CN102394730B - Multi-carrier wave dispatch - Google Patents

Abstract

The invention names a multi-carrier wave dispatch. The invention provides a dispatch of data blocks on multi-data carrier waves (310 and 320) and monitor selection of data carrier waves. During a communication conversation period of the dispatch and at least one participant received unit (100), an emitting unit (200-1) simultaneously emits at least first data blocks (14) on the first data carrier wave (310) and emits second data blocks (22) on the second data carrier wave (320), based on the receiving quality of previously received data blocks (12), the receiving unit (100) selects which one of the data carrier waves (310 and 320) to be monitored, namely the first data blocks (14) or the second data blocks (22) are received, and at least one of the first and second data blocks (14 and 22) is based on sharing information with the data block (14 and 22) and the previously received data blocks (12), for example, the firs data blocks (14 ) or the second data blocks (22) are re-emitting edition of the previously received data blocks (12).

Description

Multi-carrier scheduling

The application is the divisional application of the application for a patent for invention that application number is 200580049737.1, the applying date is on May 11st, 2005, denomination of invention is " multi-carrier scheduling ".

Technical field

The present invention relates generally to the scheduling of data block in radio communications system, and relate in particular to transmitting and receiving of on many data carriers data dispatching piece.

Background technology

The utilization of radio resource and channel is constantly subject to many research and development to optimize the throughput of system causing due to the limited availability of the radio resource in communication system.This is especially true in new communication service is introduced to existing communication system time.The example of this class new communication services is multimedia broadcast multicast services (MBMS).The benefit of this MBMS service is that it can use Same Physical channel that data are distributed to some users simultaneously, i.e. so-called point-to-multipoint transmission.Please refer to 3GPP document [1] about the more information of MBMS.

But, although the existing communication system of for example GSM (global system for mobile communications [cf1]) and EDGE (the GSM evolution of enhanced data rates) communication system and so on is generally used for providing by tolerance guaranteed minimum C/I (Carrier interference ratio) level that is suitable for traditional voice service, but the minimum C/I level of these assurances is often too low and cannot successfully provide new high bit rate services, for example video flowing on MBMS.Due to the needs to high bit rate, these services often must be used the communication resource allowing (time slot) of maximum quantity.

But, even radio link simulation shown when use the communication resource of maximum quantity in GSM/EDGE system time, the data block robustness accepted down to minimum assurance C/I level of often also having to retransmit time and again to provide.But the quantity that provides this class that can accept robustness to retransmit is often too high in existing GSM/EDGE system, thereby causes unacceptable poor throughput.

To introduce multicarrier EDGE solution for this compromise obvious solution between low robustness (due to little repeating transmission) and poor throughput (due to too many repeating transmission).But although this may be relatively simple and clear in the base station of existing communication system, but multicarrier solution is by the great change needing in mobile terminal, because these terminals have to process multiple channels in analog-and digital-part simultaneously.

Summary of the invention

Thus, need a solution, this solution allows in existing communication system, to implement high bit rate services and still provides acceptable robustness and throughput and without existing mobile terminal is made to great change.

The present invention has overcome these and other shortcoming of prior art scheme.

General object of the present invention is to provide a kind of robust data block dispatching with high data block throughput.

Another object of the present invention is to provide a kind of relating to and on many data carriers, carries out the scheduling that data block is transmitted simultaneously.

Another object of the present invention is to provide a kind of selection of the data carrier that is used simultaneously in transmit data blocks.

Specific purpose of the present invention is to provide a kind of transmitting and scheduling and reception that reduces data block error rate and selects.

These and other object is by meeting as the present invention that appended Patent right requirement limited.

In brief, the present invention relates to, on multiple different pieces of information carrier waves, data block is transferred to the receiving element that participates in communication session together with transmitter unit simultaneously.These data blocks on different carrier are relevant with current communication service, and current communication service can be unicast services, or broadcast in particular or multicast services.

In this multi-carrier scheduling, in the time that the second data block is launched on the second data carrier, at least one first data block is also launched simultaneously on the first data carrier.Then, which in these data carriers receiving element select to intercept, and receives the first or second data block.At least partly quality of reception of the data block associated with the session based on previous reception and carry out this data carrier and select.And, in the data block that this is previous and the first and second data blocks at least one of them based on public information.For example, in the first and second data blocks can comprise previous data block information at least a portion or can be its re-transmitted version.

By making a choice between these two data carriers based on the quality of reception, it is to receive further information (for example, the further repeating transmission of previous data block) or the fresh information relevant to previous data block that receiving element is selected substantially.

In exemplary embodiment of the present invention, the previous data block if receiving element does not successfully receive and decodes as the quality of reception is represented, it may be favourable receiving other data bit relevant to the information of decoded in error.In this case, receiving element is preferably selected to carry the data carrier of the data block relevant with this previous data block to increase and had been correctly decoded also decipher previously and the chance of the information that current data block is entrained.But the previous data block if receiving element has successfully received and decoded, from decoding viewpoint, receives that the data block that comprises the bit relevant to successful decoded information is wasted often and insignificant.In this case, receiving element preferably selects to carry the data carrier of data block, and described data block comprises and the incoherent fresh information of previous data block.

Especially, in the broadcast and multicast conversation of receiving element with multiple participations, some in these unit have generally correctly received previous data block, and other unit does not have.In this case, when successfully receiving element receives new data block and fresh information by another data carrier of selection, unsuccessful receiving element is managed acquisition the new chance of reception decoded information.Thus, the specified Block Error Rate in system will reduce, and specified throughput is without any remarkable reduction.

Other parameter according to the selection of data carrier of the present invention outside can the quality of reception based on previous data block.The information of the volume residual that for example, data block is retransmitted, the information that is considered to the control frame of failure and/or the carrier-quality of the data carrier that adopts can be used together with the quality of reception.

Transmitter unit is suitable on the first data carrier, launching at least the first data block stream simultaneously and on the second data carrier, launching second block of stream.This first-class first group of comprising multiple data blocks, and second comprises second group of multiple data blocks equally.In addition, second group is the restructuring version (reshuffled version) of first group of data block.Therefore, each data block comprises the information identical with data block in first group in second group, but the relative order of the data block of second group is different from the relative order of data block in first group.The position of first group in first-class can be identical with the position of second group in second.But if only overlap or do not have overlappingly in these two groups transmission, second group is the version of time delay and the restructuring of first group, is preferred.

In addition, in the time launching the data block of first and second groups, can use different data transfer rates.For example, in the time that data block is launched for the first time, can use High Data Rate, when this specific repeating transmission, use lower data transfer rate.

In a preferred embodiment, the relative position of two data blocks based on public information is different than the relative position of these data blocks in first group in second group.And with regard to the quantity of intermediate data piece, than first group, the distance between these data blocks in second group is preferably larger, to increase diversity in the time of the data block of second group of transmitting.This class scheduling scheme has increased diversity and has prevented attenuation problem.

The invention provides following advantages:

-allow the robustness transmission of data block and do not reduce piece throughput;

-multiple available data carriers provide the flexibility that reduces Block Error Rate simultaneously;

-permission is more effectively used available radio resource in communication system;

-can in low carrier noise ratio and Carrier interference ratio level, carry out the operation of gratifying high bit rate and broadcast service; And

-in existing communication system, even down to approximately serving identical Carrier interference ratio level with traditional voice, can both implement the high bit rate services the video on MBMS.

Other advantage provided by the invention will be understood after reading following examples explanation of the present invention.

Accompanying drawing explanation

By reference to the accompanying drawings, can understand best the present invention and further object and advantage with reference to following explanation, in the accompanying drawings:

Fig. 1 is the schematic overview that adopts communication system of the present invention;

Fig. 2 is the flow chart having illustrated according to the embodiment of reception data block of the present invention;

Fig. 3 A and 3B schematically illustrate the embodiment of transmit data blocks on different pieces of information carrier wave;

Fig. 4 A and 4B schematically illustrate the embodiment of while transmit data blocks on different carrier;

Fig. 5 schematically illustrates the tissue of data block according to an embodiment of the invention;

Fig. 6 is the flow chart that illustrates in greater detail the embodiment of the selection step of Fig. 2;

Fig. 7 schematically illustrates another embodiment of transmit data blocks on different pieces of information carrier wave;

Fig. 8 is the flow chart that the additional step of the data block method of reseptance of Fig. 2 has been described;

Fig. 9 is the flow chart having illustrated according to the embodiment of transmit data blocks of the present invention;

Figure 10 understands that the group of Fig. 9 generates the flow chart of the embodiment of step in more detail;

Figure 11 schematically illustrates the embodiment according to transmit data blocks of the present invention;

Figure 12 is the block diagram of performance and the prior art of comparison embodiments of the invention;

Figure 13 is the block diagram of performance and the prior art solution of comparison embodiments of the invention;

Figure 14 schematically illustrates another embodiment according to transmit data blocks of the present invention;

Figure 15 is the flow chart that understands in more detail the embodiment of the step of transmitting of Fig. 9;

Figure 16 be illustrated be represented as mobile terminal according to the schematic block diagram of receiving element of the present invention;

Figure 17 is the schematic block diagram having illustrated according to the embodiment of emission system of the present invention;

Figure 18 is the schematic block diagram having illustrated according to another embodiment of emission system of the present invention; And

Figure 19 is the schematic block diagram having illustrated according to another embodiment of emission system of the present invention.

Embodiment

In the accompanying drawings, identical reference marker will be used to correspondence or similar element.

The present invention relates to multiple, at least two data carriers, transmit and receive data block so that increase receiving element successfully receives and detect the probability of data block.It is a kind of for select and be received in method and the unit of the data block of launching on many data carriers simultaneously that a first aspect of the present invention provides.A second aspect of the present invention relates to a kind of method, System and Network node for while transmit data blocks on many data carriers.

Fig. 1 is the schematic overview that adopts communication system 1 of the present invention.In this illustrative system 1, be present in four mobile terminals of radio coverage area 205-1 of network node or base station 200-1 or unit 100-1 and participate in the communication session with base station 200-1 to 100-4.Described communication session can be broadcast and/or multicast (point-to-multipoint) service such as multimedia broadcast multicast services (MBMS).But, the present invention is not limited to this, and conventionally can be applied to any type of communication service, serve comprising clean culture (point-to-point), and especially can be applied to the high bit rate services that may need multiple radio channels or resource, but also can be applied to the service or have without Limited authorization possibility.

In the communication system 1 of Fig. 1, base station 200-1 from MBMS server 600 relevant or that connect receive MBMS data and with at least two different data carriers 310,320 in point-to-multipoint mode with the form of data block or grouping this data transmission to the mobile terminal 100-1 of participation MBMS session to 100-4.

Note, the transmission of data blocks on many data carriers 310,320 can be managed by two different transmitters, for example two base station 200-1,200-2.In this case, the first base station 200-1 can be on the first data carrier 310 transmit data blocks, transmit data blocks on the second different data carrier 320 simultaneously of the second base station 200-2.The mobile terminal 100-3 being present in radio coverage area 205-1, the 205-2 of these two base station 200-1,200-2 can receive the data block on two data carriers 310,320 potentially.

In another example, in fact at least the second transmitter can be mobile terminal 100-5 self, and it is as the unit that has relay capabilities of another mobile terminal 100-4 at that time.This will be discussed hereinafter in more detail.

Thus, the present invention is applicable to communication system 1, wherein, and transmitter unit or node 200-1 or multiple transmitter unit 200-1,200-2; 100-5 is while transmit data blocks at least two data carriers 310,320.

The present invention is particularly useful for GSM (global system for mobile communications) and EDGE (enhanced data rates G SM evolution) communication system, but the present invention can be applied to any FDMA (frequency division multiple access) system equally.The present invention can also be applied to adopting the communication system of other point of multiplex technique, such as OFDM (OFDM) system or CDMA multiple carrier (code division multiple access) system, comprise multicarrier WCDMA (wideband CDMA) system.And the present invention can also be applied to the radio broadcasting of digital video broadcasting (DVB) and other type, described digital video broadcasting is for satellite, movement and/or terrestrial broadcasting transmission.

According to the present invention, " data carrier " is adoptable any carrier wave in the wireless communication system that comprises broadcast system, data carrier data with the form of data block or grouping from transmitter unit transmission or be transmitted into receiving element.The typical preferred example of this class data carrier is frequency carrier.In the case of adopting the communication system of frequency hopping, data carrier is defined as comprising frequency-hopping mode, and all radio bursts of data block are considered to be on identical data carrier wave and launch, identical although the frequency carrier of these radio bursts does not need.In OFDM or WCDMA system, data carrier can be the subset of available orthogonal sub-carriers.

Fig. 2 has illustrated the flow chart that receives according to an embodiment of the invention data block method.This method of reseptance is based between the data carrier that simultaneously carries the data block in given communication session and makes a choice.The method from step S1, wherein, first data block of the receiving element of for example mobile terminal from the transmitter unit received communication session of for example base station.The data block that receiving element trial decoding receives and the quality indication that the quality of reception that represents this first data block is provided conventionally.

In the first execution mode of the present invention, this quality of reception can specify receiving element whether can be correctly decoded the full content of data block simply.But, also can adopt more detailed quality representation according to the present invention.For example, signal to noise ratio (SNR) can represent this class quality of reception indication.The further example that can be used for the parameter of the quality of reception that represents the first data block comprises that block error probability (BLEP), BLER (block error rate) (BLER), bit error rate (BEP), bit error rate (BER) (BER), carrier-in-interference (C/I) compare etc.Thus, conventionally indicate any expression of the quality of reception of the first data block receiving in receiving element or by receiving element to be used according to the present invention.The quality of reception represents to be estimated by the decoding device of receiving element, for example, by operation cyclic redundancy check (CRC) (CRC) or by other quality estimation unit in receiving element.In the situation that data-oriented piece has been launched and has been received thus many times, quality representation of the present invention is preferably considered the mass accumulation of the gross mass of that all (again) transmission of specific.This principle can also be extended to two data blocks to be based on public information but to be not situation about retransmitting each other.In this case, the mass accumulation that the quality of reception can be based on this two data blocks (separately) quality of reception.

In next step S2, receiving element this quality of reception based on the first data block selects to intercept a data carrier in this at least the first and second data carrier.And the first data carrier carries the second data block when the second data carrier carries the 3rd data block, wherein, this 3rd data block and previous the first data block are based on public information.Thus, in embodiments of the present invention, the 3rd data block may be the copy of the first data block, and the 3rd data block comprises the payload information identical with the first data block, although it may differently be modulated and/or encode.In another embodiment, the 3rd data block comprises a part for the information of the first data block.For example, the 3rd data block may comprise Part I and second (residue) part, and wherein Part I comprises the information bit identical with the information bit comprising in the part of first, and Part II comprises out of Memory bit.In another execution mode, the 3rd data block comprises the incremental redundancy relevant to information in the first data block.

In other words,, by making a choice between these two data carriers based on the quality of reception, receiving element is selected reception second or the 3rd data block substantially.Because the 3rd data block comprises the information relevant to the information of carrying in the first data block of previous reception, so this that make between data carrier selects the quality of reception that also can be considered to based on the first chunk for example, still to receive in the reception further information relevant to the first data block (, retransmitting again of the first data block) selection of making between fresh information (the second data block).

In exemplary embodiment of the present invention, the first data block if receiving element does not successfully receive and decodes as the quality of reception is represented, it may be favourable receiving the further data bit relevant to decoded in error information.In this case, thereby preferably selecting the second data carrier in step S2, receiving element can receive the information that the 3rd data block chance that also increase is correctly decoded decipher first and the 3rd data block are carried.But, the first data block if receiving element successfully receives and decodes in step S1, receiving the 3rd data block from the viewpoint of decoding wastes and insignificant often, because the relevant bit of the information that this data block comprises to success is decoded.In this case, the fresh information of launching during can receiving the second data block thereby receiving element is preferably selected the first data carrier and being received in session.

In the given broadcast session that relates to multiple receiving elements, for example, in MBMS session, be desirably in the given time, some receiving elements will correctly receive the first data block and other unit can not be correctly decoded all bits of this data block.Then the fresh information that the receiving element, being correctly decoded generally selects the first data carrier to comprise to receive the second data block based on their (height) qualities of reception of corresponding first.On the contrary, be not correctly decoded unit and preferably select the second data carrier to obtain the additional opportunities of the information of decoding the first data block by receiving the 3rd data block based on their corresponding (low) qualities of reception.The receiving element that gives not to be correctly decoded receive and this additional opportunities of decoded information not to reduce the throughput of the receiving element being correctly decoded or time of delay as cost, thereby because these can select to be different from based on their relatively high qualities of reception relevant to first and not be correctly decoded unit and intercept another data carrier and reception fresh information bit.

Then, in step S3, receiving element receives data block on selected data carrier, and second or the 3rd data block.Then the method finishes.

Method of reseptance of the present invention as above is preferably participated in all receiving elements of communication session or is at least adopted by a unit or some unit.The step S1 of Fig. 1 to S3 preferably at the different pieces of information piece being repeated during communication session for launching in session.Due to transmission in the data block relevant to same communication session is on different pieces of information carrier wave, the potential transmission of information and data block and the quantity of repeating transmission are increased, and the throughput of communication session is without any reduction.

In the foregoing description about Fig. 2, receiving element based on previous reception and the quality of reception of the data block that is not necessarily correctly decoded carry out between the first and second data carriers and make a choice.This should only be counted as illustrated examples of the present invention.Described selection can be performed among the n of an arbitrary number available data carriers, and a described n available data carriers is carried the data block relevant to communication session simultaneously, and wherein, n is equal to or greater than 2 integer.Note also, the present invention can also be applied to the receiving element of multi-carrier capability.In this case, receiving element selects to intercept n m data carrier in possible carrier wave based on the quality of reception simultaneously, wherein, and 1≤m < n and n >=2.This provides further advantage for receiving element, because power/battery and/or hardware complexity can be saved by only intercepting the subset of all available carrier wave in this unit.

The first data block may be launched into receiving element on the first data carrier, the second data carrier or the 3rd data carrier, and the first data carrier is identical with the carrier wave of the second data block, and the second data carrier is identical with the carrier wave of the 3rd data block.Second and the 3rd data block may directly follow in time the first data block, or they may be the first data block transmission and second and the time transmission of the 3rd data block between time slot.In this data slit, base station can be carried out some other tasks or be launched other data block.

Fig. 3 A and 3B are that transmit data blocks according to the present invention is to allow the explanation of the embodiment that selects data carrier.Explanation transmission of data blocks these and subsequently in accompanying drawing, data carrier is represented by frequency carrier.But this only should be counted as according to the illustrative of possible data carrier wave of the present invention and nonrestrictive example.

In communication session, the first data block 12 is at data carrier f ₁on be launched into relevant (or multiple) receiving element.Note, this first data block 12 must be not necessarily first data block of just in time launching in session, and in fact it can be any given data block.(or multiple) receiving element receives the quality indication that this data block 12 and generation or estimation represent the quality of reception of this data block 12.If other relevant data block was previously launched, this quality indication can be mass accumulation.

In Fig. 3 A, comprise that the second data block 16 of the out of Memory that is different from the first data block 12 is then at identical data carrier f ₁on be launched.Preferably, (or multiple) receiving element receives equally the second data block 16 and estimates the quality of reception indication of this piece 16.Then the quality of reception that, each receiving element corresponding (or multiple) is estimated based on it is indicated at available carrier wave f ₁, f ₂among select.In the first embodiment of the present invention, in selection course, only adopt the quality of reception relevant to the first data block 12 or the second data block 16.But, in a preferred embodiment of the invention, represent both quality of reception indications of these data blocks 12,14 be preferably used for selecting in to provide more selections basic.In the later case, because two data blocks 12,16 are not based on public information, so two different quality indications are used rather than mass accumulation.

In this illustrative example, the 3rd data block 14 is at the data carrier f identical with the second data block 16 with the first data block 12 ₁on be launched and be the re-transmitted version of first 12.Another data carrier f ₂be used to launch the 4th data block 22, the four data blocks 22 is re-transmitted version of the second data block 14 simultaneously.

Suppose after the first transmission receiving element first data block 12 of can not decoding, and second data block 16 of successfully decoding after the first transmission of the second data block 16.Receiving element can be based on first 12 (low) quality of reception and (height) quality of reception of second 16 select to intercept first retransmitted frequency f ₁, receive the 3rd data block 14.Correspondingly, between the first transmission period, successfully decode the first data block 12 and the receiving element of second data block 16 of successfully not decoding generally carrys out selective reception the 4th data block 22 (re-transmitted version of second 16) based on quality of reception designator, intercept another frequency f ₂.

This embodiment of transmitting data provides and in three transmission opportunities only, has launched and retransmit the first data block 12 and the second data block 16 chance once.This should from there is individual data carrier wave and when different the corresponding prior art situation of transmission data block compare, corresponding prior art situation will adopt transmission opportunity four times.

Fig. 3 B has illustrated slightly different scheme, and wherein, the repeating transmission 14 of the first data block 12 is immediately at same carrier wave f ₁on first transmission after.When the 3rd data block 14 is at first frequency f ₁on while being launched, the first transmission of the second data block 22 occurs in another frequency f simultaneously ₂on.The repeating transmission 16 of this data block 22 is then at first frequency f ₁on.

Then the receiving element that, has correctly received the first data block 12 in the time of the first transmission can select to intercept another carrier wave f ₂, so that potentially can be in correct second data block 22 that receives of moment t1.If the first transmission of the first data block 12 is not enough to realize its correct decoding, receiving element is preferably intercepted first carrier f continuously ₁to can receive the repeating transmission 14 of this piece 12.Then, by after receive and the decode re-transmitted version 16 of second 22, such receiving element can be potentially in the correct information that receives the first data block 12 and the second data block 22 of moment t2.

Thering is individual data carrier wave and when different in the prior art situation of transmission data block, all receiving elements all have to wait until that time t2 could receive the information that the first and second data blocks comprise always, but this can complete at time t1 (t1 < t2) according to the present invention.

As illustrated by these simple signaling block diagrams, the present invention allows to introduce the repeating transmission of data block and total time of reception of not increasing receiving element.

Note, the information that data block 14 in Fig. 3 B comprises may identical with the information of data block 12 (or at least the same as public information with data block 12), may identical with the information of data block 22 (or at least the same as public information with data block 22), or irrelevant with data block 12,22.In the situation of data block 14 and 22 based on public information, these two data blocks 14,22 can be launched with different pieces of information speed at the same time, but by different coding and/or comprise slightly different still relevant information.Under latter event, data block 14 may be for example the re-transmitted version of the data block of previous transmitting, and data block 22 comprises the incremental redundancy relevant to this previous data block.

Hereinbefore, with reference to carrying at the same time between at least the first and second data carriers of different pieces of information piece and make a choice and described the present invention based on the quality of reception.Fig. 4 A and 4B have illustrated according to the definition of " transmission simultaneously " of the present invention or " carrying " simultaneously.

As well-known in the art, in data block or radio blocks four continuous tdma frames in GSM/EDGE system, be launched by four radio bursts.These four radio bursts in four continuous tdma frames form so-called time slot together.

With reference to figure 3A or 3B and Fig. 4 A, wording " simultaneously transmission " comprise data block 14 and data block 22 at identical tdma frame 30-1 to the corresponding radio bursts/time slot in 30-4, but at different carrier frequency f ₁, f ₂on transmission.For example,, with carrier frequency f ₁on the relevant radio bursts of time slot TS1 be used to data block 14, and with carrier frequency f ₂on the relevant radio bursts of time slot TS1 be used to data block 22.But, according to wording of the present invention, " transmission simultaneously " is not limited to this illustrative example, but there is partly overlapping situation while being also included in multiplexing, mean that at least a portion of data block 14 is launched within the time interval identical with at least a portion of transmit data blocks 22.

Fig. 4 B has illustrated in transmission, to have partly overlapping this situation.Data block 14 is launched in time slot TS1 and four radio bursts relevant to 30-4 to four continuous T MDA frame 30-1.But data block 22 is launched on four radio bursts of 30-5 at time slot TS1 and tdma frame 30-2.A part that this means data block 14 is launched in tdma frame 30-1, there is no the transmission of implementation data piece 22 in this frame.At tdma frame 30-2, in 30-4, both data of data block 14,22 are at different frequency f ₁, f ₂on be launched.In the end, in the tdma frame 30-5 of explanation, only have a part for data block 22 to be launched.

Thus, when definition according to the present invention, transmit also to have contained and in the transmission of these two data blocks, there is partly overlapping situation.Note also, data block 22 not necessarily must be positioned at radio bursts same position for data block 14 on the radio bursts of tdma frame launch.With reference to figure 4B, data block 14 can be launched to being labeled as in 30-4 in the radio bursts of TS1 at tdma frame 30-1, and data block 22 for example can be launched to being labeled as in 30-5 in the radio bursts of TS0 at tdma frame 30-2.In the example that another transmits simultaneously according to the present invention, at least a portion of data block 14 is launched in the tdma frame identical with at least a portion of data block 22.

Fig. 5 has illustrated may organizing of the controll block in employing GSM/EDGE communication system of the present invention or the data in frame or radio blocks.As well-known in those skilled in the art, data or the information by being launched into receiving element of for example MBMS data and so on are organized into LLC (logic link control) piece or the frame that comprise multiple information bits.This LLC frame is divided into RLC (radio link control) piece that size may be different subsequently.RLC piece is packaged as the radio blocks (RB) may with fixing " original bit size ".Due to the potential difference size of RLC piece, radio blocks can comprise one or more (typically being two of as many as) piece.Then, radio blocks, in time slot, is launched in four radio bursts in four continuous T DMA frames.

The data block defining in the present invention in the time being applied to GSM/EDGE system can be so-called radio blocks or RLC piece.Then, select the quality of reception of radio blocks that can be based on previous reception to be made on radio blocks basis according to data carrier of the present invention, or the quality of reception of RLC piece that can be based on previous reception is made on RLC piece basis.In the situation that RLC block size equals radio blocks size, between these two embodiment, conventionally there is no difference, between two block types, there is man-to-man relation.But, comprise in the situation of two RLC pieces at radio blocks, one interweaves and another interweaves in two bursts in residue in the first two radio bursts of radio blocks, and the selection of data carrier can be carried out on the right basis of burst.This is for especially attractive the higher modulation such as MCS-8 and MCS-9 and encoding scheme (MCS).Then, piece header is preferably identical on two data carriers selects with the data carrier of simplifying based on RLC piece.

In fact, the selection of data carrier can be carried out with meticulousr granularity, on the basis of burst to burst, makes a choice.For example, receiving element can select to receive only three in four bursts of radio blocks before being then switched to another data carrier attempting decoding.This meticulousr granularity will improve performance.

According to data carrier of the present invention select can be based on except the quality of reception of one or more data blocks out of Memory and parameter.For example, for receiving element, using the data carrier selection scheme of average probability that can minimise data background block error may be favourable sometimes.As mentioned above and as illustrated in fig. 5, data block (radio blocks and RLC piece) is generally organized into LLC frame.Forever lose if receiving element has been concluded a data block of specific LLC frame, for example, successfully do not received because all repeating transmission of data block have all made, can think that LLC frame forever loses.In this case, even if receiving element has the good opportunity of the remaining data piece that receives that LLC frame, and it also may ignore the remaining data piece of this LLC frame completely, and phase shaft priority give its have lower correct receiver can other data block (belonging to other LLC frame).Thus, if receiving element could not successfully receive one or more data blocks of specific LLC frame, receiving element often from manage to receive and any remaining data piece of that LLC frame of decoding cannot obtain whatever, because conventionally only have when this unit has correctly received all data blocks of that LLC frame or the data block of minimum number at least, LLC frame is just successfully received and is significant.

In Fig. 3 B, suppose that the first data block 12 belongs to a LLC frame and the second data block 22 belongs to the 2nd LLC frame.Also supposition, receiving element previously could not correctly receive and belong to for example data block of a LLC frame, and this data block comprises its any repeating transmission.In this case, even if the quality of reception of the first data block 12 specifies this piece not to be correctly received, the information of the quality of reception that receiving element also can be based on first and the miss data piece of a LLC frame selects to intercept second frequency carrier wave f ₂to manage to receive the second data block 22 that belongs to another not failed LLC frame.

In another example, based on the information of the volume residual of the expected data piece of previous data block identical information, the volume residual that the expectation of for example piece is retransmitted, can be used to select according to data carrier of the present invention.For example, suppose that receiving element could not correctly receive the first data block and notifiedly be desirably at once the once repeating transmission of only carrying out this failed block on the first data carrier.Further supposition, receiving element is current is just being subjected to very poor radio quality, and the probability that therefore successfully receives data block is very low.In this case, receiving element is intercepted the first data carrier and may be wasted, because the probability of the correct reception of the last repeating transmission of the first data block and the wherein decoding of information may be too low.So conventionally, be more preferably and intercept another data carrier to manage to receive at least some information of the new data block of launching thereon when launch the first data block on the first data carrier time simultaneously.

In another situation, the quantity that the expectation of the first data block of failure is retransmitted on the first data carrier may exceed once.In this case, in the time that one of repeating transmission of first is launched on the first data carrier simultaneously, the quality of reception of the first data block that receiving element can be based on failure and the information of the number of re-transmission of this piece select to intercept another data carrier.This may be because the quality of reception indication of the first data block of failure is enough for the information expection of successfully decoding wherein receives only retransmitting again of this piece.Then, receiving element is without all repeating transmission of intercepting this piece, and intercepts another data carrier during can being chosen on the contrary these repeating transmission one or more.

Selecting according to data carrier of the present invention can also the channel quality of part based on relevant to the first and/or second data carrier.For example, even if suppose and decoding error occurs and cause the unsuccessful reception of the first data block, in the time that the first data block is launched on the second data carrier for example, channel/carrier quality is good.Worsen from the quality of known the second data carrier of channel quality data of estimating, and the channel quality of first carrier is fine.In this case, intercepting the first data carrier may be more favourable to receive the data block of transmitting thereon.

Note, the low channel quality of data-oriented carrier wave has increased the probability of the unsuccessful reception of the data block of transmitting thereon, and thus conventionally (negatively) affect the quality of reception of this data block.But the quality of reception of data block is also considered other parameter outside channel quality, and may occur that the quality of reception is low and situation that channel quality is high.

Fig. 6 is the flow chart that understands in more detail the embodiment of the selection step S2 of Fig. 2.Method continues from the step S1 of Fig. 2.In the first optional step S10, receiving element provides the information of the volume residual of the expected data piece of the information based on identical with the data block of previous reception, the quantity that the residue of for example data block is retransmitted.Alternatively, the information of the desired amt of the repeating transmission of ensuing data block on these at least two data carriers can be used.This information can be from communicating by letter with receiving element and receiving to the transmitter unit of there transmit data blocks.In another embodiment, the data block of receiving element based on previous reception oneself determined this quantity.For example, the transmission plan that particular transmission unit adopts can be that data block is launched three times altogether, i.e. the first transmission and twice repeating transmission.In this case, receiving element can receive the quantity that this data block how many times is inferred or at least estimation residue is transmitted based on it.This information can also be indirectly receives from transmitter unit, transmitter unit then notify receiving element it to current communication session by the particular transmission scheme adopting.Then the information that, receiving element has received this piece how many times based on this scheme notice and it is determined the quantity of residue repeating transmission.

In next optional step S11, receiving element provides the piece relevant to previous miss data piece to detect the information of error data and the LLC frame under them.Thus, receiving element is preferably stored it and is thought the notice of LLC frame of failure, wherein due to it fail to receive belong to the data block that comprises its any repeating transmission of that LLC frame or at least the data block of minimum number think this LLC frame failure.

In step S12, the quality of reception (referring to step S1 in Fig. 2) of receiving element based on the first data block and the information based on number of re-transmission and background block error data or failed LLC frame data at least one of them selects data carrier.In the first embodiment, in processing, selection only uses the quality of reception and number of re-transmission.Adopt in a second embodiment the quality of reception and background block error data/failed LLC frame, and in the 3rd embodiment, adopt the quality of reception, number of re-transmission and background block error data/failed LLC frame data.Then the method proceeds to the step S3 of Fig. 2.

In another embodiment of the present invention, the carrier-quality that the selection step S12 of Fig. 6 can be based on the first and/or second data carrier and the quality of reception and optionally based on number of re-transmission and/or background block error data.

Fig. 7 illustrated according to of the present invention on multiple data carriers another method of transmit data blocks simultaneously, its data carrier of having realized based on the quality of reception is selected.This Fig. 7 has illustrated first-class 10 the first frequency carrier wave f that carries multiple data blocks ₁, second frequency carrier wave f simultaneously ₂be used to launch the second 20 of multiple data blocks.

The first data flow 10 comprises first group 15 of multiple data blocks, and the second data flow 20 comprises second group 25 of multiple data blocks equally.In addition, the information of the each data block in second group 25 based on identical with data block in first group 15.In the preferred embodiment of the present invention, the each data block in second group 25 comprises at least a portion information in the data block in first group 15, and more preferably, and the each data block in second group 25 is the repeating transmission of the data block in first group 15.

The data block location of first group 15 in the first data flow 10 may be consistent with the correspondence position of second group 25 in second 20.In this case, first group 15 first arrive last data block at first frequency f ₁on be launched, simultaneously second group 25 first to last data block at second frequency f ₂on be launched.But as shown in Figure 7, in the preferred embodiment of the present invention, the corresponding data piece of the transmission of the data block of second group 25 with respect to first group 15 postpones if having time.This means when first data block 12 of first group 15 is at first carrier f ₁on while being launched, do not belong to the data block of second group 25 simultaneously at second frequency f ₂on be launched.In two group 15,25 transmission, may exist and partly overlap, therefore when at first frequency f ₁when one of them data block 14 that upper transmitting is first group 15, the data block 22 of second group 15 is launched simultaneously on second group 25.Another execution mode can adopt two group 15, the not overlapping transmission of 25 data block, and therefore, in the time that first data block 22 of second group 25 will be launched, the final data block 14 of first group 15 has been sent out.

As depicted in the figures, second group 25 can be the time delay version of first group 15.Alternatively, second group 25 can be the restructuring version of first group 15, and therefore the relative order of the data block of second group 25 is different from the relative order of the corresponding data piece of first group 15.And second group 25 can be the restructuring version of first group 15, it also with respect to first group of delay (partly overlap or not overlapping) in transmission.

As can be seen from Figure 7, receiving element can receive nearly retransmitting for three times of data block potentially according to the specific selection of frequency carrier, amounts to receive for four times and attempts.This should with only have corresponding single frequency carrier wave (for example f ₁) situation compare, wherein, receiving element can receive at most once to be retransmitted.Consider in the most real communication system on identical data carrier, on average to only have one or and to maximum twice repeating transmission, because otherwise throughput will be too low.Therefore, the invention provides more potential reception and attempt, it has greatly reduced residual data BLER (block error rate) and without any the reduction of throughput.

Suppose that given receiving element intercepted for example first frequency carrier wave f ₁until moment t ₁.Then, receiving element has and continues to intercept first frequency f at this moment t 1 ₁selection so that receive first group 15 final data block 14 or change carrier wave to second frequency f ₂to receive first data block 22 of second group 25.Preferably, this frequency is selected at least in part the mass accumulation based on representing data block DB219,12 reception gross mass on opportunity.Thus, if do not use other parameter in this selects to process, if two of data block DB2 potential receptions are not enough to be correctly decoded the information that mass accumulation reflects opportunity, receiving element is preferably selected second frequency f so ₂.Otherwise receiving element preferably continues to intercept first frequency f ₁.

Fig. 8 is the flow chart that the additional step of the method for reseptance of Fig. 2 has been described.The method is from step S 20, and wherein, receiving element provides the scheme information relevant to the first data chunk and/or the second data chunk.Thus, this scheme information allows receiving element to infer the relative order of the data block in first and/or second group.This scheme information can also provide the order information of the transmission of data blocks on all data carriers in addition, for example the relative order of the data block in the first and/or second data flow.

Transmitter unit may always adopt the transmission plan of specific (standardization), and therefore receiving element is known (fixing) data block order in advance.In this case, certainly do not need to provide scheme information and step S20 to omit.But, the many predefined available transmission schemes that may exist transmitter unit therefrom to select.These different schemes can be suitable for different radio condition, for example, available hardware in low or high radio quality, different data type, transmitter unit etc.In this case, transmitter unit is preferably sent in the notice of the specific selected scheme that will use in current communication session in step S20 to receiving element.This scheme notice can be a part for session establishment program or be launched after a while.If there is no available standard scheme, the subsequent data blocks transmission that transmitter unit is preferably for example notifying receiving element on different carrier in step S20 during session establishment.This class is notified and for example can be stated, first each data block launches once on first carrier, then on same carrier wave, carries out the first repeating transmission.Second and the 3rd retransmit follow thereafter the predefined cycle but on another data carrier.

In another execution mode of step S20, the relative order of the data block based in another group or on another data carrier, receiving element is determined the relative order of the data block in one of them group or one of them data carrier.For example, many data blocks can be prior to first or second group or stream on one of them carrier wave (data block DB1, DB1 and DB2 in Fig. 7).The relative order of the data blocks that then, receiving element can be based on before these is carried out the subsequent order of specified data piece.This process can be expanded, and like this in step S20, receiving element is determined the relative order of the expectation of the subsequent data blocks on one of them data carrier at least by the order of the data block that may receive so far on different pieces of information carrier wave.

The relative order of data block, i.e. transmission plan, can be fixed, and this hint is used same transmission plan during communication session is whole.Can use in other embodiments self adaptation or changeable scheme, therefore during session, change or new transmission plan more.Then, transmitter unit preferably notifies this scheme of receiving element to change, unless receiving element can oneself be inferred it.

Note, particular transmission scheme not necessarily must mean that the relative order of the data block on data-oriented carrier wave must be identical with the relative order of the data block on another data carrier.

In next step S21, receiving element provides specifies the carrier information of one of them data carrier for while transmit data blocks according to the present invention.This identifier that provides step S21 for example to send institute's usage data carrier wave or one of them data carrier when the session establishment by transmitter unit is implemented.Under latter event, the identifier of the carrier wave of receiving element based on notified is preferably identified (or multiple) other data carrier.

Can during whole communication session, use identical data carrier.But the present invention is also applicable to adopt the communication system of carrier exchange.In this case, in transmitter unit or system, some other network node preferably notifies receiving element (or multiple) new data carrier or a frequency hopping v.In the later case, receiving element can be according to f ₁+ v, f ₂+ v calculates new frequency carrier.Adopt different frequency hopping υ for different frequency carriers ₁, υ ₂also be possible.

Note also, the quantity of the data carrier of employing can change during session.For example, in the situation that having two original data carriers, can during session, add the 3rd data carrier, therefore three data carriers are used to while transmit data blocks in session altogether.Contrary is also genuine, can remove and usage data carrier wave during whole session no longer.As long as there are at least two remaining data carrier waves can be for while transmit data blocks.

Then method proceeds to the step S1 of Fig. 2.

Fig. 9 has illustrated according to the present invention the flow chart of the embodiment of transmit data blocks.Method is from step S30, and wherein, the transmitter unit of for example base station provides the first data chunk that comprises multiple data blocks, described multiple data blocks by be launched into participate in the communication session of transmitter unit at least one receiving element.Can the application program from transmitter unit provide this first group of data block or previously from another transmitter unit, network node or service provider, for example MBMS server has received this first group of data block.

In next step S31, the relative order of multiple data blocks of first group is reorganized to generate second group of multiple data blocks.Thus, the relative order of the data block of second group is different from the corresponding order of the data block of first group.The data block of second group also comprises the information identical with the data block of first group.

Then, in step S32, on the first data carrier, transmitting comprises multiple data blocks first-class of the first data chunk, and on the second data carrier, transmitting comprises the second of multiple data blocks of the second data chunk simultaneously.

In certain embodiments of the invention, the first and second streams comprise respectively the first and second data chunk.This means substantially in the time that the data block of first group is launched on the first data carrier, and the data block of second group is launched simultaneously on the second carrier wave.In other embodiments, the first and second streams comprise respectively other data blocks except the first and second data chunk.In these cases, the transmission of the data block of second group can be consistent with the transmission of the first data chunk, the partly transmission of overlapping first group or separate in time with the transmission of first group does not therefore have overlapping for these two groups in the transmission of data block.

This process certainly can be extended to and exceed two data carriers and data chunk.For example, first the first data chunk is sent out on the first data carrier, the second data chunk is sent out (simultaneously, overlapping or not overlapping) on the second data carrier, and on the 3rd data carrier, is sent out (simultaneously, overlapping or not overlapping) as the 3rd data chunk of the restructuring version of first group and second group.Alternatively, the delay version of first or second group can be sent out (overlapping or not overlapping) subsequently on the 3rd data carrier.

Then the method finishes.

Figure 10 is the flow chart that the additional step of the launching technique of Fig. 9 has been described.The step S31 of the method from Fig. 9 continues.In next step S40, for first and/or second group and/or first and/or the transmission plan of second be passed to receiving element.Thus, the relative order of the data block of at least one in piece group or piece stream is launched in this step S40.The in the situation that of standardization or predefined available transmission schemes, can launch the identifier of at least one this class scheme that will adopt.Otherwise, preferably launch more detailed piece order information.

In next step S41, the information of the data carrier adopting is passed.This information can comprise all employings data carrier identifier or only adopt one of them or wherein a part identifier.Under latter event, receiving element preferably own (or multiple) identifier based on transmitting is determined (or multiple) carrier wave of failing to give notice.

Communicating by letter of scheme information and carrier information can send together or dividually, for example, in the time of other during session establishment or during communication session.Can adopt static scheme and/or data carrier.But, may be preferably in some application program can be adaptive or change the transmission plan and/or the data carrier that adopt.In this class situation, the information of new departure and/or (or multiple) data carrier is preferably passed to correlation reception unit.

Figure 11 is the signal diagram having illustrated according to the transmission of data blocks of the embodiment of the present invention.In this accompanying drawing, comprise that first block of stream 10 of first group 15 of multiple data blocks is at the first data carrier f ₁on be launched, comprise that second block of stream 20 of second group 25 of multiple data blocks is at the second carrier wave f simultaneously ₂on be sent out.Visible in this accompanying drawing, the each data block in first group 15 has the correspondence (re-transmitted version) in second group 25, but in two group 15,25, the relative order of piece is different.

In a preferred embodiment of the invention, comprise the first data block 11 for first group 15, (directly) is second data block 13 (being for example the re-transmitted version of first 11) of the information based on identical with the first data block 11 after described the first data block.After this second data block 13, be first sequence 17 that comprises at least one data block.Correspondingly, second group 25 preferably includes the re-transmitted version 21 of the first data block 11, is second sequence 27 that comprises at least one data block after this re-transmitted version 21.In other words,, in first group 15, " the piece distance " relatively between the first data block 11 and the first re-transmitted version thereof (the second data block) 13 is preferably less than the correspondence " piece distance " between first 21 and second 23 in second group 25.This reason is for having IA High Speed Channel coded data piece, only to attempt twice transmission (transmission of data block 11,13) may be a shortcoming aspect diversity afterwards, and has advantage aspect diversity for the 3rd (data block 21) of identical or relevant information and (data block 23) transmission attempt subsequently.The first transmission and first that this means piece is retransmitted and is preferably occur in the relatively short time cycle, and any repeating transmission subsequently preferably spreads all in time to diversity is provided.

The Another reason that uses different masses distance on different pieces of information carrier wave may be to increase the probability that gives to receive in configuration that receiving element has many transmitter units many possibilities of certain data block, and described many transmitter units are launched in nonsynchronous mode on many data carriers.If different transmitter units is by identical sequential transmission data block and just have different time migrations, the probability that allows two transmitter units always simultaneously launch identical block will be quite large.Thus, this means that two transmitter units will provide the more multimachine meeting that receives any data-oriented piece for receiving element than individual transmitter.On the other hand, if data block is launched by different transmitter units with different order, the degree of freedom significantly increases and two transmitter units are very impossible except once in a while launches just at the same time identical data block.

If propagation delay is quite large, similar discussion also can be applied in synchronizing network.Even if launch identical data block when transmitter unit is guaranteed difference, same data block still may arrive receiving element from different transmitters because of different propagation delays simultaneously.

In the time the first transmission of data block 11 being adopted to different pieces of information or code rate than its repeating transmission 13,21,23, especially applicable apart from situation about discussing with the different masses on different pieces of information carrier wave hereinbefore.Thus, the first transmission 11 preferably has high data rate and can be at a data carrier f ₁upper received to avoid diversity, effectively provide lower data rate and can be at different carrier wave f and retransmit 13,21,23 ₁, f ₂upper received to increase diversity.In this case, in the time sending data block 11, it all uses the first data rate to launch.Any repeating transmission 13,21,23 of this piece 11 all uses at least the second data rate that is preferably lower than first rate to send.All these repeating transmission 13,21,23 can be the second speed or can adopt changing downs to each repeating transmission 13,21,23.

In further expanding, use a frequency f for all radio bursts ₁launch the first transmission 11, can in each burst, on different frequency, be sent out to provide maximum diversity and retransmit.

As illustrated in the second 20 in Figure 11, transmitter unit can interrupt at a data carrier f temporarily ₂upper transmission.Send and stop having different reasons for this class.Data carrier may be subject to low-down radio quality or interference level temporarily, so transmit data blocks there is no meaning at that time.Alternatively, transmitter unit may be busy with carrying out other task temporarily, comprises with this carrier wave f ₂send the data relevant to other session.

Adopt the scheduling scheme shown in Figure 11 to simulate.In these simulations, data block is MCS-6 RLC piece.For the sake of simplicity, first only consider that a time slot and supposition expectation bit rate are～10kbit/s.This quantity and MBMS service height correlation are 4[1 because the video flowing on MBMS roughly requires the maximum quantity of the time slot in 40kbit/s and expection MBMS], the target bit rate of every time slot is given 10kbit/s.And the LLC frame sign of use 500 bytes, so it comprises seven RLC pieces.In these simulations, think～1% LLC Loss Rate is acceptable.

By the prior art solution only with individual data carrier wave (frequency), for MCS-6～nominal rated speed of 30kbit/s means three transmission can carrying out each RLC piece i.e. twice repeating transmission.The result LLC Loss Rate of this prior art solution is used curve " 3TX " explanation in Figure 12.Significantly, this service eases down to the 11-12dB of the Loss Rate with < 1%.

By two frequencies, according to the present invention, each RLC piece can be launched 6 times, and in each frequency 3 times, and still reach the nominal rated speed of 30kbit/s transmission plan shown in Figure 11 is used to obtain the curve " 3TX in each frequency of 2 frequencies " in Figure 12.In Figure 12, can find out, obtain 1% Loss Rate at the C/I place that approximately 4dB is lower.Because EFR (EFR) voice at least need to be slightly lower than 10dB to operate well, so communication network is often configured to provide this C/I level.This means that the 4dB gain being produced by the present invention can be that cell boarder place in the communication network that is designed for GSM voice has or do not have the difference between acceptable MBMS quality.

For reason relatively, there is unifrequency but have three times and prior art situation that four RLC pieces are retransmitted also uses respectively curve " 4TX " and " 5TX " to illustrate in the accompanying drawings.As shown in Figure 12, in the time of 1% LLC Loss Rate, Figure 11's and scheduling scheme according to the present invention than thering is the prior art better off of for four times of each RLC piece retransmitting.In addition, than having this prior art situation of retransmitting for four times, the throughput of the scheduling scheme of Figure 11 is obviously higher.

Can further improve gain of the present invention by for example increasing the quantity of adopted data carrier.Along with the quantity of data carrier used increases, be far longer than number of carriers even if participate in the quantity of receiving element of session, the performance of communication system also convergence has the performance of the special Temporary Block Flow (TBF) of confirmation/(ACK/NACK) the unconfirmed feedback for single receiving element.

As is well known in the art, can type of service for some communication service and system the feedback business that is ACK/NACK.In this class feedback, the receiving element that does not successfully receive data block can be notified its base station and this data block of request repeat.But, because can (simultaneously) in community implementing the quantity of the receiving element of this class ACK/NACK feedback is limited (being generally 16), so this class feedback solution effect for MBMS and other broadcast and multicast services is lower or not effect, wherein, the par that simultaneously participates in the receiving element of broadcast/multicast session can be expected and is greater than the maximum quantity of the feedback unit that (may be tens mobile units) allow.Thus, the present invention also by can be any ACK/NACK feedback provide performance like comparing class to realize the introducing of this class multicast and broadcast.

Result shown in Figure 12 obtains with single time slot.By multiple time slot more complicated.Receiving element can not be switched to next time slot from a time slot data carrier (frequency) conventionally.For example, this means that receiving element can be only four radio blocks groups rather than be each radio blocks selection data carrier with four time slots.But the adjacent time-slots in identical TMDA frame is subject to closely similar decline situation conventionally, and as shown in Figure 13, all must use the restriction of identical data carrier wave not need that performance is had to very large impact for all time slots of tdma frame.

Reuse the transmission plan of Figure 11, but apply on four parallel data streams on four time slots, all repeating transmission of each RLC piece are on the time slot identical with original transmitted.All four time slots of tdma frame are given identical C/I, and use desirable frequency hopping between TMDA frame.Each time slot has been simulated 2500 pieces.Receiver frequency scheme is very simple: if the RLC piece not being correctly received is up to now just at second frequency f ₂on at least one time slot on be launched, at second frequency f ₂upper reception, otherwise at first frequency f ₁upper reception.

In Figure 13, curve " 1 freq " has illustrated only have the above-mentioned situation that unifrequent prior art situation, curve " 2 freq., 4TS " represent to have four time slots, and curve " 2freq., 1TS " represents that (comparing with the simulation of Figure 12) only has the corresponding situation of single time slot.In Figure 13, can find out, the great majority gain with a time slot can be maintained in the time having four time slots.Note also, the typical operation point of MBMS is to be about 10 ^-3remaining RLCBLER.

Frequency hopping in the many frequencies of estimation supposition in Figure 13 is made.If there is no frequency hopping, by receive the extra potential advantage with rapid drawdown (the fading dips) that can avoid declining in the frequency with better C/I.

The receiver selection scheme using in Figure 13 extremely simple and can be for example by adopt previously discussed in selection, use than in the selection scheme of the more data of the quality of reception one of them and be easily carried out improvement.

Note also, by dispatching radio blocks on four continuous slots in a tdma frame rather than on four continuous T DMA frames, can prevent that data carrier (frequency) from can not change to from a time slot problem of next time slot completely.

As described above, according to the selection of data carrier of the present invention preferably at the same time transmitting among belonging to the data carrier of data block of Different L LC frame, carry out.Figure 14 has illustrated such a case, and wherein, the first data flow 10 comprises first group 15 of data block that belongs to a LLC frame.Use first carrier f at this first group 15 ₁when transmitting, the second carrier wave f ₂be used to transmitting and belong to the 3rd group 28 of data block of the 2nd LLC frame.As the restructuring version of first group 15 and comprise that thus second of the data block group 25 that belongs to a LLC frame is then at the second carrier wave f ₂on follow.At second group 25 at the second carrier wave f ₂on when being launched, first carrier f ₁be used to send the 4th group 18 of data block that belongs to the 2nd LLC frame or the 3rd LLC frame.Thus, in this transmission plan according to the present invention, relevant data carrier f ₁, f ₂carry the data block that belongs to Different L LC frame simultaneously, thereby allow receiving element to avoid intercepting specific carriers, the current transmitting of this specific carriers belongs to the data block failed for receiving element that be considered to of LLC frame.

As above, in conjunction with as described in Fig. 1, the data block on different pieces of information carrier wave not necessarily must be launched by same transmitter unit.As shown in Figure 1, the first data carrier 310 can be used by the first base station 200-1, and another data carrier 320 is used by the second base station 200-2.If receiving element 100-3 can intercept the transmission in these base stations 200-1,200-2 Liang Ge community 205-1,205-1, result is by identical with having single transmitter unit when.The advantage with this difference is not need extra bandwidth for excessive data carrier wave.The present invention is conducive to have the receiving element of low C/I especially, and because these unit 100-3 generally probably approaches cell boarder, is unlikely so relevant unit 100-3 can intercept another base station 200-2.In most of the cases, each in base station 200-1,200-2 can be used in multiple data carriers, therefore receiving element 100-3 can select potentially among exceeding the data carrier of two, and these data carriers may be from same cells or different districts 205-1,205-2.

In another embodiment of the present invention, the transmitter unit 200-1 of for example base station adopts at least one unit 100-5 that has relay capabilities in order to carry out the transmission on one of them data carrier 320.In this case, base station 200-1 is to having the unit 100-5 transmission 325 first of relay capabilities or the data block of second and ordering it to forward this stream to one or more receiving element 100-4 on data-oriented carrier wave 320.When this TU Trunk Unit 100-5 forwards one of them data flow, base station 200-1 launches (or multiple) other data flow on one (or multiple) other data carrier 310.

In another optional embodiment, base station 200-1 sends 325 first data blocks to the mobile unit 100-5 and the receiving element 100-4 that have relay capabilities.There is the unit 100-5 of relay capabilities preferably based on ordering the order of this first data block of restructuring or provide elsewhere from base station restructuring, and the transmitting 320 to receiving element 100-4 using data block as second.

The unit 100-5 that has relay capabilities can be the fixing or mobile node that forms a network configuration part, and for example its form is repeater.In optional execution mode, mobile terminal 100-5 or some other non-network communication units can be used to this task.The execution mode with the unit that has relay capabilities that exceedes is also possible, for example, at least adopt the situation of three data carriers.

Figure 15 has illustrated the flow chart that has the additional step of Fig. 9 launching technique of the situation of the unit of relay capabilities for employing.The step S31 of the method from Fig. 9 continues.In next step S50, base station is transmitted into second (or first) stream of data block the unit of relay capabilities.Together with this transmission of data blocks or dividually, the data block that base station commands has the unit of relay capabilities to send to one or more receiving elements.This data block is forwarded to data carrier used can be specified and be included in order or may be selected by TU Trunk Unit oneself by base station.Then the method proceeds to the step S32 of Fig. 9, and wherein, first (or second) data flow is launched in base station on the first data carrier, has the unit of relay capabilities on the second data carrier, to forward second (or first) data flow simultaneously.

Alternatively, base station is launched the first data flow and is ordered its recombinate order of this data block to generate second to the unit that has relay capabilities.And TU Trunk Unit is also sent the data flow of this restructuring on the data carrier different from the data carrier that is used for receiving the first data flow by order.

Figure 16 is according to the schematic block diagram of receiving element 100 of the present invention, and it is illustrated as mobile terminal or unit.But, the present invention is not limited to the receiving element 100 take mobile terminal as form, but can be applied to participating in any receiving element that communicates session (for example MBMS session) with transmitting node and be suitable for receiving data block during whole session.

Receiving element 100 comprises that universal input output (I/O) unit 110 is for receiving data block and may being used for reception programme and carrier identifiers.Unit 100 also comprises the demodulator/decoder 120 of the data block being received by I/O unit 110 for demodulation code.Other unit in this demodulator/decoder 120 or receiving element 100 is also for the data block having received is determined the quality of reception.As mentioned above, this quality of reception can obtain from crc check, is simple decoded/non-decoded notification or mass parameter that some are meticulousr, such as SNR, BLEP, BLER, BEP, BER, C/I etc.

The quality of reception that carrier wave selector 130 is implemented for based on being estimated by demodulator/decoder 120 in receiving element 120 selects data carrier to intercept in particular moment among multiple available carrier wave.This selector 130 can be configured to for selecting a data carrier from least two possible carrier waves, or from least three possible carrier waves, selects at least two carrier waves in the case of the unit 100 that has multi-carrier capability.These possible data carriers also carry data block simultaneously, and the information that one of them data block based on previously having received with I/O unit 110 is identical and the data block demodulator/decoder 120 based on entrained are estimated the quality of reception.

Carrier wave selector 130 can also adopt the quality of reception relevant to the data block of multiple previous receptions, accumulative reception quality and/or adopt other data outside one or more qualities of reception in selection course.The information of quantity information, carrier-quality data and/or the previous failed LLC frame of residue retransmitted data blocks can also be used together with the quality of reception.

Scheme identifier 140 is preferably implemented in receiving element 100 in order to notify the relative expectation order of the data block of carrier wave selector 130 on different carrier and/or the residue number of re-transmission of certain data block.This scheme identifier 140 is determined the relative expectation order of the data block on different pieces of information carrier wave substantially.This determines the scheme identifier that may receive from transmitter unit based on I/O unit 110, or the order of the scheme identifier 140 own data blocks based on having been received by I/O unit 110 is so far determined it.

Corresponding optional carrier identifier 150 is preferably provided in receiving element 100 for notifying the possible data carrier of selector 130 to select among them.This identifier 150 always notice of spontaneous emission unit or other external unit provides this information.Alternatively, for example one of them individual information based on other carrier wave of identifier 150 is carried out oneself one of them data carrier of identification.

The unit 110 to 150 of receiving element 100 may be provided in software, hardware or its combination.

Figure 17 is according to the schematic block diagram of the embodiment of emission system 400 of the present invention.Emission system 400 comprises the I/O unit 410 for communicating by letter with external unit, comprise participate in the communication session of emission system 400 in receiving element.This I/O unit 410 is particularly suited for transmit data blocks on multiple data carriers 310,320 simultaneously.I/O unit 410 can comprise for antenna or the transmitter apparatus of this piece transmission simultaneously or be connected to this antenna or transmitter apparatus.Antenna equipment also can comprise the antenna of multiple separation, and wherein, for example each this class antenna is suitable for specific frequency carrier transmit data blocks.

System 400 also comprises data block buffering device 440, and it stores the data block that will be launched in (clean culture, broadcast or multicast) session at least provisionally.They oneself may be generated data block by the application-specific in emission system 400.Alternatively, they are from the external source such as service provider, for example MBMS server, or some other communication network node is received.

Piece group provides device (provider) 420 to be configured in emission system 400 first group in order to multiple data blocks to be preferably provided from relevant data buffer 440.This first group will be launched by one in I/O unit 410 and antenna equipment usage data carrier wave 310,320.The data block of first group or its at least one identifier provide device 420 to bring piece group reorganization device (block set shuffler) 430 into by group.This group reorganization device 430 is recombinated the relative order of data block of first group to generate at least the second data chunk.Then this second group will be launched by I/O unit 410 on another of data carrier 310,320.Common oneself the recombination data piece in buffer 440 not of reorganization device 430, but the identifier of data block of first group of recombinating.Then the order, providing with identifier is taken out data block from buffer 440.

In a preferred embodiment, group reorganization device 430 generates second group, and wherein, the relative position of two data blocks based on public information is different than the relative position of these data blocks in first group.And at the quantitative aspects of intermediate data piece, the distance between these data blocks in second group is preferably more than first group so that the diversity while increasing transmit data blocks.

The transmission plan that may order can be provided by optional Scheme Choice device 450 of the data block in the specific reorganization scheme that group reorganization device 420 adopts and first group stipulates.In the Relational database with multiple different predefine available solutions 460 that this Scheme Choice device 450 preferably provides from be configured in emission system 400 or in outside, select the scheme using.The specified scheme of selecting may be at least in part based on input message, and the form of input message is for example the quantity of the receiving element of current wireless electricity quality condition, participation, will launches available hardware in which kind of data, emission system 400 etc.

In optional execution mode, in database 460, do not have predefine (standardization) scheme and Scheme Choice device 450 for example to generate a suitable scheme based on above identified input message oneself.

Database 460 can also comprise carrier data, or the data of this formation can be provided in private database.In the time that I/O unit 410 provides the piece of the data block of first group that device 420 defines and second group of being defined by group reorganization device 430 by transmitting by group, the notice of the data carrier that adopt can be obtained from database 460.Also may, emission system 400 is only to access the data carrier of fixing limited quantity, and these data carriers always adopt by I/O unit 410 in the time of transmit data blocks, therefore need not carry out the selection of suitable data carrier.Alternatively, external unit can be notified the data carrier that emission system 400 and I/O unit 410 will adopt.

I/O unit 410 is also preferably configured to for forwarding the transmission plan of specific use selected by Scheme Choice device 450 and/or the information of the identifier of data carrier to participating in (or multiple) receiving element of communication session.

Then, the data block of first and second groups is launched in I/O unit 410 with the form of the second data flow on the first data flow on the first data carrier 310 and the second data carrier 320, wherein first-classly comprises first group, and second comprises second group.This principle is extended to simply has the situation that exceedes two available data carriers.Note, although the first and second data flow are by I/O unit 410 transmitting simultaneously on different data carrier 310,320, but the data block of first and second groups not necessarily must launch simultaneously because they the relative position in the first and second streams may be different respectively.

I/O unit 410 can use different data rates for different data blocks.In a preferred embodiment, in the time that being launched for the first time, certain data block uses higher data rate.Correspondingly, no matter occur in first group or second group, the repeating transmission of this data block is all preferably carried out with relatively low data rate.

The unit 410,420,430 and 450 of emission system 400 may be provided in software, hardware or its combination.Unit 410 to 460 can at single network node, for example, be implemented in the emission system 400 in base-station node together.Alternatively, be used in some unit that provide in the heterogeneous networks node in communication system and also may realize distributed enforcement.

Figure 18 is the schematic block diagram with the distributed emission system 400 of dedicated communications network node 200-1,200-2 and block management data node 500.In this embodiment, other network node of base station controller 500 or some, for example base station, comprises that piece group provides device 520, piece group reorganization device 530, data buffer 540, Scheme Choice device 550 and scheme and carrier wave database 560.The class of operation of these unit is similar to above about the operation described in Figure 17 and does not do further discussion at this.As long as piece group provides for example transmission plan based on being selected by selector 550 and defined the first and second data chunk of device 520 and group reorganization device 530, relevant data block is just forwarded to by the base station 200-1 accompanying drawing, associated transmissions unit that 200-2 represents from data buffer 540.Then, each in this class base station 200-1,200-2 by management data block stream and group one of them transmission and there is corresponding data buffer or high-speed cache 240-1,240-2, wherein data block before the I/O unit 210-1, the 210-2 that use base station 200-1,200-2 transmit by adhoc buffer.For example, base station controller 500 is forwarded to the first base station 200-1 the data block of the first data flow, forwards together with the order that preferably should be launched with data block notice, unless the order being forwarded from data block clearly.In addition, can be sent to base station 200-1 for the data carrier information of the first base station 200-1 and the time information that should start to transmit.Correspondingly, the second base station 200-2 preferably receives the data block of second together with order information, carrier information and temporal information.

Then, on the data carrier 310 that the first base station 200-1 is assigned at it, send first data block, the second data block stream is launched in the second base station on its relevant data carrier 320 simultaneously.

In Figure 18, disclosed emission system 400 can be extended to the Special transmitting unit 200-1, the 200-2 that comprise the use different pieces of information carrier wave 310,320 that exceedes two.

Unit 210-1, the 210-2,510,520,530 and 550 of emission system 400 may be provided in software, hardware or its combination.Data block management functionality can be carried out with other network node outside base station controller 500, for example, carried out by the 3rd base station.

Figure 19 is the schematic block diagram of another distributed execution mode of emission system 400.In this embodiment, the first network node being represented by the first base station 200-1 comprises that piece group provides device 220, piece group reorganization device 230, data buffer 240, Scheme Choice device 250 and scheme and carrier wave database 260.The class of operation of these unit is similar to the corresponding unit of Figure 17 and does not do further discussion at this.In addition, the first base station 200-1 is also suitable for sending at least one of them data block stream of simultaneously launching at least one data carrier 310.

One (or multiple) other data block stream is forwarded to by the I/O unit 210-1 of this first base station 200-1 at least one that represented by the second base station 200-2 in accompanying drawing the unit of relay capabilities.Then this second base station 200-2 is indicated on the data block that on the different data carrier 320 of the data carrier used from the first base station 200-1, transmitting is forwarded.In another embodiment, there is the unit 200-2 of relay capabilities can be repeater node, mobile relay device or be actually mobile unit.

Unit 210-1, the 210-2,220,230 and 250 of emission system 400 may be provided in software, hardware or its combination.

Those skilled in the art should understand, and under the prerequisite that does not depart from the scope of the invention defined by the appended claims, can make different changes and change to the present invention.

list of references

[1]3GPP?TS?43.246，version?6.1.0：3 ^rd?Generation?PartnershipProject；Technical?Specification?Group?GSM/EDGE?Radio?AccessNetwork；Multimedia?Broadcast?Multicast?Service(MBMS)in?theGERAN；stage?2(Release?6)，November?2004.

Claims (14)

1. a method that is received data block by receiving element (100), comprises the following steps:

Described receiving element (100) receives the first data block (12);

Based on the quality of reception of described the first data block (12), described receiving element (100) makes a choice carrying first data carrier (310) of the second data block (14) and carry between second data carrier (320) of the 3rd data block (22) simultaneously, described selection is made before in described the second data block of reception (14) or described the 3rd data block (22), wherein, described the first data block (12) and described the 3rd data block (22) are based on public information;

Described receiving element (100) receive described the second data block (14) or described the 3rd data block (22) change to before described the first data carrier (310) and described the second data carrier (320) in selected data carrier, unless intercepted selected data carrier; And

It is the data block of described the second data block (14) or described the 3rd data block (22) that described receiving element (100) receives on selected data carrier.

2. according to the method for claim 1, wherein, described selection step comprises the following steps: that described receiving element (100) makes a choice between described the first data carrier (310) and described the second data carrier (320) based on the described quality of reception and the quantity information of potential subsequent data blocks of at least a portion information based on comprising described the first data block (12) or described the second data block (14).

3. according to the method for claim 1 or 2, wherein, data block is assembled piece frame, each frame comprises multiple data blocks, described selection step comprises the following steps: to detect error message based on the piece of the described quality of reception and the data block based on belonging to the piece frame identical with described the first data block (12) or described the second data block (14), and described receiving element (100) makes a choice between described the first data carrier (310) and described the second data carrier (320).

4. according to method arbitrary in claim 1 to 2, wherein, described selection step comprise the following steps: based on the described quality of reception and based on at least one relevant carrier-quality in described the first data carrier (310) and described the second data carrier (320), described receiving element (100) makes a choice between described the first data carrier (310) and described the second data carrier (320).

5. according to method arbitrary in claim 1 to 2, wherein, described the first data carrier (310) carries first-class (10) of data block and described the second data carrier (320) carries the different second (20) of data block simultaneously, each data block in second group (25) of multiple data blocks of described second (20) comprises at least a portion information in the data block in first group (15) of multiple data blocks of described first-class (10), described first group (15) comprise that described the second data block (14) and described second group (25) comprise described the 3rd data block (22).

6. according to the method for claim 5, also comprise the following steps: that described receiving element (100) receives described the first data group (15) and at least one the relative order information of described data block in described the second data group (25).

7. according to method arbitrary in claim 1 to 2, wherein, described the 3rd data block (22) is the re-transmitted version of described the first data block (12).

8. a receiving element (100), comprising:

Receiver (110), for receiving the first data block (12);

Device (130), for the quality of reception based on described the first data block (12), make a choice carrying first data carrier (310) of the second data block (14) and carry between second data carrier (320) of the 3rd data block (22) simultaneously, described selection receives described the second data block (14) or described the 3rd data block (22) is made before at described receiver (110), wherein, described the first data block (12) and described the 3rd data block (22) are based on public information; And

Device (130), for receiving described the second data block (14) or described the 3rd data block (22) changes to described the first data carrier (310) and the selected data carrier of described the second data carrier (320) before at described receiver (110), unless intercepted selected data carrier, wherein, described receiver (110) be configured in described choice device (130) select data carrier on receive be the data block of described the second data block (14) or described the 3rd data block (22).

9. receiving element according to Claim 8, wherein, described choice device (130) be configured to for: based on the described quality of reception and the quantity information of potential subsequent data blocks of at least a portion information based on comprising described the first data block (12) or described the second data block (14), between described the first data carrier (310) and described the second data carrier (320), make a choice.

10. according to Claim 8 or 9 receiving element, wherein, data block is assembled piece frame, each frame comprises multiple data blocks, described choice device (130) be configured to for: the piece based on the described quality of reception and the data block based on belonging to the piece frame identical with described the first data block (12) or described the second data block (14) detects error message, between described the first data carrier (310) and described the second data carrier (320), makes a choice.

11. according to Claim 8 to arbitrary receiving element in 9, wherein, described choice device (130) be configured to for: based on the described quality of reception and based on at least one relevant carrier-quality of described the first data carrier (310) and described the second data carrier (320), between described the first data carrier (310) and described the second data carrier (320), select.

12. according to Claim 8 to arbitrary receiving element in 9, wherein, described the first data carrier (310) carries first-class (10) of data block and described the second data carrier (320) carries the different second (20) of data block simultaneously, each data block in second group (25) of multiple data blocks of described second (20) comprises at least a portion information in the data block in first group (15) of multiple data blocks of described first-class (10), described first group (15) comprise that described the second data block (14) and described second group (25) comprise described the 3rd data block (22).

13. according to the receiving element of claim 12, and wherein, described receiver (110) is configured at least one the relative order information of described data block for receiving described the first data group (15) and described the second data group (25).

14. according to Claim 8 to arbitrary receiving element in 9, and wherein, described receiving element (100) is mobile terminal.