CN100433706C

CN100433706C - Uplink macrodiversity incorporating method

Info

Publication number: CN100433706C
Application number: CNB2005100568839A
Authority: CN
Inventors: 吴玉忠; 涂悦
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2005-03-28
Filing date: 2005-03-28
Publication date: 2008-11-12
Anticipated expiration: 2025-03-28
Also published as: CN1842050A

Abstract

The present invention discloses an uplink macro-diversity mergence method. When data packets of different branches are received by the method, the quality of the data packet with certain CFN number is mainly considered. In a mergence waiting timer, only the quality of the data packet is good, namely that the data packet satisfies a merging condition, the data packet takes part in mergence processing; the data packet with poor quality is discarded; therefore, the quality of the data packet which takes part in the mergence is ensured, and further, the high quality of the merged data is ensured. After the mergence timer overtime is overtime, if the data packet with the CFN number is a data packet with good quality, the data packet is uploaded by the present invention; the data packet with good quality is ensured to take part in the mergence, and further, the high quality of the merged data is ensured; the phenomenon that polling and retransmission for multiple times cause the oversized flow rate of an entire network or even cause the deterioration of transmission performance is avoided; simultaneously, the submitting efficiency and the transmission efficiency of uplink data are improved.

Description

The method that a kind of uplink macro diversity merges

Technical field

The present invention relates to grand diversity folding, refer to the method that a kind of uplink macro diversity merges especially.

Background technology

Grand diversity folding is meant between radio network controller (RNC) and the user terminal (UE) can select multi wireless links, connects by a plurality of NodeB and realizes communication, can effectively improve Radio Link communication efficiency and communication quality.

Based on above-mentioned grand diversity folding, in the data transmission procedure of wireless system, the up packet that may receive simultaneously from many branch roads, like this, need be merged by certain strategy these packets from different branch, such as judging, finally obtain being submitted to high level behind the merging data according to quality of service indication and coding checkout.

In Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, behind the up packet of receiving from different branch, will merge according to identical continuous frame number (CFN).

At present, the method that uplink macro diversity merges is fairly simple, but can not overcome because the time delay of every different branch there are differences, and the situation of packet loss may occur for same CFN number packet, thereby cause the merging compromised quality.Fig. 1 is the flow chart that the prior art uplink macro diversity merges, and is example with certain bar branch road, and job step is as follows:

Step 100～step 102: judge whether to receive certain CFN number first packet, if receive, then startup enters step 103 after merging waiting timer; Otherwise, abandon returning step 100 behind this packet.

Need carry out packet that uplink macro diversity merges all have one CFN number, between NodeB and RNC, be consistent for this CFN number.Such as, the packet that need to receive this moment be CFN number be 3 packet, promptly current C FN number is 3, then RNC is according to the CFN information in the packet, whether CFN number that judges the packet receive be 3, if be 3 CFN number and be to receive first, then starts and merge waiting timer; If CFN number is not 3, then this packet is abandoned.

The CFN of the packet of current reception number value depends on default system counter, and system counter adds one, and being about to CFN number increases by one.

Here, merge the transfer of data shake time delay that the waiting timer timing length depends on every branch road, generally get in all branch roads that long branch road of shake time delay the time elongatedness as merging the waiting timer duration, certainly the setting of this duration can be decided according to other situation of system, is combined efficient, merges the requirement of quality etc. as system.

Step 103～step 105: judge that whether the packet that receives satisfies the merging condition, if satisfy the merging condition, then enters step 106 behind the merging data bag; If do not satisfy the merging condition, enter step 106 after then abandoning this packet.

Here passing judgment on the standard whether satisfy the merging condition is: at first the CFN of this packet number should be for current C FN number, such as 3; Secondly, (1) if this packet through Cyclic Redundancy Check, and CRC check indicating correct so then compares error rate of physical channel (BER) or transmission channel BER.Comparative approach is: according to the goal-selling BER of system's regulation, if the BER of current data packet is better than goal-selling BER, judge that then this packet is the measured packet of matter, promptly the measured packet of this matter satisfies the merging condition, otherwise judge that this packet is ropy packet, promptly this ropy packet does not satisfy the merging condition; When the CRC check misdirection, judge that then this packet is ropy packet, promptly this packet does not satisfy the merging condition.(2) if this packet is not pass through CRC check, then directly compares physical channel BER or transmission channel BER and get final product, method is described in (1).

The packet that will satisfy the merging condition in step 103～step 105 is merged according to certain strategy of systemic presupposition.

Step 106～step 108: judge whether this timer is overtime, if overtime, abandon this packet, return step 100 after simultaneously the packet that merges being uploaded to high level; Otherwise, continue to receive packet and return step 103.

In step 106～step 108,, in timing, continue the packet that receives is merged judgement if it is not overtime to merge waiting timer;

If it is overtime to merge waiting timer, then with the data packet discarding that receives, the data delivery that will finally merge is given high-risely simultaneously, and high-rise data to the final merging that receives are assembled.The high level here is adjacent logical layer, also can think to be exactly the destination node of data flow or referring to of the next receiver module of data.

For CFN number determine, the front was mentioned, and current CFN number value depends on default system counter, each timer expiry and the packet that merges is submitted high-rise after system counter add one, be about to CFN number increase by.Such as, above-mentioned CFN number is 3, after merging waiting timer data delivery overtime and that will finally merge and giving high level, is adjusted to 4 CFN number.CFN number value is increased at 255 o'clock at system counter in 0～255 scope, promptly equal at 255 o'clock CFN number, and system counter resets, and since 0 counting, also is to increase progressively since 0 for CFN number again.

Job step from above-mentioned prior art uplink macro diversity merging, from step 103～step 105 as can be seen, behind timer expiry, even be this packet that merges required value and also be dropped for CFN number, above-mentioned situation that may packet loss that Here it is, the effect that uplink macro diversity is merged incurs loss.Such as, suppose to have a kind of like this combination situation, wherein second-rate packet place branch road uplink time delay is little, and the measured packet of matter place branch road uplink time delay is big, the delay variation of the two place branch road is greater than merging the waiting timer duration simultaneously, according to the method for uplink macro diversity merging at present, will upwards submit second-rate branch road packet this moment, and abandon the measured packet of matter so.

At present two kinds of commonplace business are to adopt the business of affirmation mode (AM) transmission means and adopt the business of stopping the isotype transmission means, and the method that merges in conjunction with the prior art uplink macro diversity below is further analyzed the problem that prior art exists:

The AM pattern refers to a kind of mechanism of receiving terminal to the reception condition of transmitting terminal feedback data message, such as, transmitting terminal has sent 1,2,3,4,5 five data, receiving terminal can be to transmitting terminal announcement reception condition, such as correctly having received 1 to the transmitting terminal announcement when receiving data or satisfy certain condition, 2,4,5 four data, and do not receive 3 these data.This feedback mechanism is exactly an affirmation mode.According to the working method of AM pattern, after having reported second-rate packet, will certainly cause network side to require UE to carry out the re-transmission of data, otherwise high level just can't be with the data assembling of each segmentation.And in some cases, be in the bigger environment of certain decline such as UE, needing repeatedly poll and re-transmission, this has also increased the flow of whole network, has caused the deterioration of transmission performance.

Stopping isotype proposes at the AM mode, under the AM pattern, after receiving terminal receives data, advertised information is returned to transmitting terminal in the capital, receiving terminal carries out retransmission operation according to announcement then, can influence the transmitting efficiency of transmitting terminal like this, therefore, in stopping isotype, transmitting terminal provides the announcement that a sliding time window is waited for receiving terminal, transmitting terminal continues to the receiving terminal data retransmission simultaneously, like this, may be when transmitting terminal not also be received the re-transmission announcement, the data retransmission that receiving terminal is needed has been uploaded to receiving terminal, receiving terminal can be as early as possible to high-rise data delivery, and at this moment receiving terminal no longer sends and retransmits announcement.

As seen, this isotype of stopping can improve transmitting efficiency and submit efficient.But, in the method that the prior art uplink macro diversity merges, can the measured data of active upload matter, so the method that existing uplink macro diversity merges can not embody this advantage of stopping isotype.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method that realizes that uplink macro diversity merges, this method can solve because the data that the different branch time delay causes merge impaired problem, can improve transmission performance simultaneously, submits efficient and transmitting efficiency thereby improve upstream data.

For achieving the above object, technical scheme of the present invention specifically is achieved in that

The method that a kind of uplink macro diversity merges is provided with each branch road and merges waiting timer, and this method may further comprise the steps:

A. each branch road receives packet respectively and judges whether to receive the first packet of certain continuous frame number CFN of this branch road, if receive, enters step B after starting this first packet place branch road merging waiting timer; Otherwise, return steps A after uploading the measured packet of the matter that receives;

Whether CFN number that B. judges the packet receive be current C FN number, if enter step C after then merging the measured packet of the described matter that receives; If not, enter step C after then uploading the measured packet of the matter that receives;

C. judge should first packet place branch road whether merge waiting timer overtime, as if overtime, then upload the described measured packet of this CFN matter that receives, and the packet after will merging returns steps A after uploading; Otherwise, continue to receive data and return step B;

The determination methods of the measured packet of described matter is: the error rate of physical channel of the described packet that receives or transmission channel bit error rate are better than the packet of the goal-selling error rate.

In step B, judging that CFN number of the described packet that receives is that this method further comprises after current C FN number:

B1. judge that whether the packet that receives has the indication of cyclic redundancy CRC check, if having, then enters step B2; Otherwise, enter step C behind the measured packet of merging matter;

B2. judge that described CRC check indicates whether indicating correct, if indicating correct, enter step C after then merging the measured packet of matter; If indication is incorrect, enter step C after then abandoning the described packet that receives.

In step B, judging that CFN number of the described packet that receives is not that this method further comprises after current C FN number:

Judge CFN number of the described packet that receives with described current C FN number spacing whether less than 128, if less than, enter step C after then uploading the measured packet of the matter that receives; Otherwise enter step C after abandoning the described packet that receives.

Before steps A, this method also comprises: start each branch roads system counter respectively;

Overtime when certain branch road merging waiting timer, whether system judges the counting of this branch roads system counter less than 255, if less than, then this branch roads system counter increases by one, increases by one described CFN number simultaneously; Otherwise this branch roads system counter reset resets for described CFN number simultaneously.

As seen from the above technical solution, the present invention is when receiving the packet of different branch, the main quality of considering certain CFN number packet quality, in merging waiting timer,, promptly satisfy the packet of merging condition so long as matter is measured, all participate in merging processing, ropy packet then will be dropped, and guarantee to participate in the quality of the packet of merging like this, further guarantee to merge the high-quality of back data; After merging timer expiry, if this CFN number packet is a measured packet of matter, the present invention uploads this packet, guaranteed that the measured packet of matter can participate in merging, further guaranteed to merge the high-quality of back data, avoided owing to repeatedly poll and re-transmission, the flow of the whole network that causes is excessive, so that cause the deterioration of transmission performance; Improved the transmitting efficiency of submitting efficient and data of upstream data simultaneously.

Description of drawings

Fig. 1 is the flow chart that the prior art uplink macro diversity merges;

Fig. 2 is the flow chart that uplink macro diversity of the present invention merges.

Embodiment

Core concept of the present invention is: for certain CFN number, merge so long as the measured packet of matter all can participate in uplink macro diversity, guaranteed the quality of merging data, improved upstream data and submitted efficient and data transmission efficiency.

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.

Fig. 2 is the flow chart that uplink macro diversity of the present invention merges, and is example with certain bar branch road, supposes that the system counter of this branch road starts in the present embodiment, and has been increased to 3 with CFN number this moment, and job step of the present invention is as follows:

Step 200～step 201: judging whether to receive is for current C FN number 3 first packet, if receive, then starts and enters step 205 after merging waiting timer; Otherwise, enter step 202.Need carry out packet that uplink macro diversity merges all have one CFN number, between NodeB and RNC, be consistent for this CFN number.Such as, the packet that need to receive this moment be current C FN number be 3 packet, then RNC is according to the CFN information in the packet, judges whether CFN number of the packet that receives is 3, if be 3 CFN number and be to receive first, then starts and merges waiting timer; If CFN number is not 3, then this packet is abandoned, promptly this packet is not the required packet of uplink macro diversity.

CFN number determine is the same with prior art, also be CFN number with the increasing progressively and increase progressively of system counter, promptly counter adds one, then adds one CFN number.

Here, merge the transfer of data shake time delay that the waiting timer timing length depends on every branch road, generally get the shake time delay is long in all road that branch road the time elongatedness as merging the waiting timer duration, certainly the setting of this duration can be decided according to other situation of system, is combined efficient, merges the requirement of quality etc. as system.

Step 202～step 204: judge that whether this packet satisfies the condition of uploading, if satisfy, returns step 200 after then this packet being uploaded; Do not upload condition if do not satisfy, to return step 200 after then abandoning this packet.

If the packet that receives is not current C FN number a first packet, need then to judge whether this packet satisfies the condition of uploading, promptly at first judge CFN number of this packet with current C FN number spacing whether less than 128, if less than 128, and this packet satisfies the quality judging condition, then this packet is satisfied uploads condition, and this packet is uploaded.

The quality judging condition is: (1) if this packet through CRC check, and CRC check indicating correct, so then compare physical channel BER or transmission channel BER, comparative approach is: according to the goal-selling BER of system's regulation, if the BER of current data packet is better than goal-selling BER, judge that then this packet is the measured packet of matter, promptly this packet satisfies the quality judging condition, otherwise judge that this packet is ropy packet, promptly this packet does not satisfy the quality judging condition; When the CRC check misdirection, judge that then this packet is ropy packet, promptly this packet does not satisfy the quality judging condition.(2) if this packet is not pass through CRC check, the method for then directly pressing (1) middle relatively physical channel BER or transmission channel BER compares and gets final product.

Why the CFN spacing being limited, is in order to prevent that the CFN data from repeating to send to high level data and handling the mistake of bringing.Whether the present invention selects CFN number of packet that the median 128 of CFN number span 0～255 receives as judgement is the foundation of epicycle CFN numbering, determination methods is, current C FN number CFN number spacing with the packet that receives, whether the absolute value of difference that is the two is less than 128, if less than, the packet that then receives is the packet in the epicycle CFN numbering; If be not less than, the packet that then receives is not the packet in the epicycle CFN numbering.Such as, current C FN number is 229, and received this moment is for CFN number 100 packet, this moment so, the absolute value of the difference of current C FN numbers 229 and the CFN that receives packet numbers 100 is 129, and this value is not less than 128, so, be for CFN number 100 the packet packet when not being epicycle CFN numbering,, can handle to high level data and bring mistake if this packet is uploaded to high level.

Step 205～step 211: receive packet and judge that whether the packet that receives satisfies the merging condition, if satisfy the merging condition, then enters step 212 behind the merging data bag; If do not satisfy the merging condition, judge that then whether this packet is current C FN number packet, if this packet is current C FN packet then enters step 212 after abandoning this packet; If this packet is not current C FN number a packet, need then to judge that whether this packet satisfies the condition of uploading, enter step 212 if satisfy after then uploading, otherwise enter step 212 after abandoning this packet.

Here passing judgment on the standard that whether satisfies the merging condition is: at first should be 3 the CFN of this packet number; Secondly, this packet will satisfy the quality judging condition described in step 202～step 204.

The packet that will satisfy the merging condition in step 205～step 211 is merged according to certain strategy of systemic presupposition.

Whether the decision data bag satisfies described in the method such as step 202～step 204 of the condition of uploading in step 205～step 211.

Step 212～step 214: judge whether this timer is overtime,, upload the packet that satisfies the condition of uploading for this CFN number, will return step 200 behind the data delivery high level that merge in the timer simultaneously if overtime; Otherwise, continue to receive packet and return step 205.

In step 212～step 214,, in timing, continue the packet that receives is merged judgement if it is not overtime to merge waiting timer;

If it is overtime to merge waiting timer, satisfies in the packet of the condition of uploading the measured packet of matter for this CFN that then will receive number and upload; The data delivery that will finally merge is given high-rise simultaneously.Equally, the high level here also is meant adjacent logical layer, also can think to be exactly the destination node of data flow or referring to of the next receiver module of data.

From the invention described above method as can be seen, the key difference of the present invention and prior art point is:

Merge waiting timer overtime after, if there is the measured packet of matter to exist, and the CFN of this packet number with current C FN number spacing less than 128, the present invention uploads this packet, has guaranteed the quality of high-rise assembling data like this.

In addition, can't participate in merging if the measured branch road time delay of above-mentioned matter is big, and time delay satisfies the bad situation of branch road quality of merging condition, for the business of using the AM transmission means, network side can require UE to carry out the re-transmission poll of data.According to the inventive method, because the data of the measured branch road of matter also can be in the time after a while, promptly with time of delay of other branch road in, upwards submit, upload to so high-rise the time, high level can be thought these data that to be UE retransmit the response of poll, will directly utilize this data message to carry out the processing of data, and can not issue the re-transmission polling request of data again to UE, improve the up efficient of submitting.

For the data transmit-receive mechanism of modes such as employing stops, will accelerate data like this and merge the efficient of upwards submitting to, make that receive window can continue to slide; Also can reduce simultaneously poll, make the send window of UE side to slide rapidly, improve data transmission efficiency the UE side.

In sum, the present invention can improve the up efficient of submitting for receiving terminal; And, can promote the utilance of up transmission window for transmitting terminal.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims

1. the method that uplink macro diversity merges is characterized in that, each branch road is set merges waiting timer, and this method may further comprise the steps:

2. method according to claim 1 is characterized in that, in step B, is judging that CFN number of the described packet that receives is that this method further comprises after current C FN number:

3. method according to claim 1 and 2 is characterized in that, in step B, is judging that CFN number of the described packet that receives is not that this method further comprises after current C FN number:

4. method according to claim 1 is characterized in that, before steps A, this method also comprises: start each branch roads system counter respectively;