WO2001015472A1

WO2001015472A1 - Network-side device and method for transmitting data in a radiocommunications system

Info

Publication number: WO2001015472A1
Application number: PCT/EP2000/008008
Authority: WO
Inventors: Christian Menzel
Original assignee: Siemens Aktiengesellschaft
Priority date: 1999-08-19
Filing date: 2000-08-16
Publication date: 2001-03-01
Also published as: DE19939366B4; DE19939366A1

Abstract

The invention relates to a radiocommunications system in which a transmission channel between a network-side device and a subscriber station is allocated exclusively to the transmission of high priority real time data, in order to prevent delays in the transmission of said data. Pauses in the transmission of the real time data are detected on the transmission side. During the pauses that are detected, the exclusivity of the allocation is temporally cancelled and low priority data are transmitted to other subscriber stations in the transmission channel.

Description

description

Network-side device and method for transmitting data in a radio communication system

The invention relates to a method for transmitting data in a radio communication system and a network device for carrying out the method.

In radio communication systems, information (for example voice, image information or other data) is transmitted with the aid of electromagnetic waves via a radio interface between the transmitting and receiving station (base station or subscriber station). The electromagnetic waves are emitted at carrier frequencies that lie in the frequency band provided for the respective system. Frequencies at 900, 1800 and 1900 MHz are used for the introduced GSM mobile radio system (Global System for Mobile Communication). For future mobile radio systems with CDMA or TD / CDMA transmission methods via the radio interface, for example UMTS (universal mobile telecommunication system) or other 3rd generation systems, frequencies in the frequency band of approx. 2000 MHz are provided.

While the transmission of voice information was originally in the foreground in the GSM mobile radio system, e.g. by GPRS (general packet radio system) based on the GSM mobile radio system and for future systems also packet data services planned from the beginning. Various services are provided that have very individual requirements for variable data rates.

In the case of packet data transmission, data packets are conveyed in a packet-oriented manner. The resource, for example a transmission channel, is only assigned when a data packet is actually transmitted. For this purpose, the data packets on the send side are assigned to a resource until they are sent. The point in time is buffered and processed according to their order. The resource (the transmission channel) can be optimally used for non-time-critical services.

Time-critical services, for example a voice transmission or a video transmission, on the other hand cannot be switched in packet-oriented manner in data packets via a radio interface. Real-time data of time-critical services must not be delayed, which would be unavoidable when packaging and buffering. A resource, for example a transmission channel, is therefore exclusively allocated for time-critical services. So far, separate channels are used for time-critical and non-time-critical services.

The object of the invention is to provide an improved method and an improved network-side device which combine the packet data transmission and the transmission of real-time data. This object is achieved by the method having the features of claim 1 and the network-side device according to claim 12. Advantageous developments of the invention can be found in the subclaims.

For the transmission of data in a radio communication system, a transmission channel between a network-side device and a subscriber station is exclusively assigned for an undelayed transmission of real-time data of high priority. On the transmission side, pauses in the transmission of the real-time data are detected. During the pauses detected, the exclusivity of the assignment is temporarily removed and low-priority data is transmitted to other subscriber stations in the transmission channel.

The transmission of the low priority data is terminated at the end of a detected pause in order to continue the transmission of the real time data of high priority without delay. There is no signaling of the continuation of the transmission of the real-time data, which would delay the transmission. There U> cυ K) r P "t- ¹ cπ o Cπ o Cπ o Cπ

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implicitly addressed with the encryption, so that a aufwen ^¬-ended signaling is omitted.

In an advantageous embodiment of the invention, the Echtzeitda ^¬ th high priority and the low priority data detected by the respective receiving subscriber station by evaluating a first transmitted bit sequence as addressed to the subscriber station. One bit denotes, for example, the real-time data, while the low priority data, which can also be transmitted to several subscriber stations, are addressed, for example, by a longer bit sequence.

The invention is combined with a method (ARQ) for retransmitting incorrectly received data in order to ensure the quality of the transmission. For this purpose, the data are provided with an address head and a numbering, so that the numbering can be evaluated at the receiving end in the event of transmission errors. Data received with interference is recognized, the transmission side is signaled with the numbering and is repeatedly transmitted by it. In particular for low-priority data that permit repeated transmission with a large delay, such as packet data, a data packet that is only incompletely transmitted due to the end of the detected pause is retransmitted, for example within the next detected pause.

If the data has a lower priority than packet data, the data packets are cached in a queue particularly advantageously. Intelligent readout from one or more queues optimizes the transmission of the packet data, for example with a differentiated prioritization of the data in the individual queues.

If several transmission channels are available for the transmission of the low priority data to a subscriber station, the data are transferred to these transmission channels. divides, which significantly increases the average transmission rate. For this purpose, the low-priority data are advantageously prepared on the transmission side for separate transmission in a plurality of transmission channels. For example, several queues and a multiplexer are available to prepare the data. The data is divided, for example by means of the multiplexer, for the separate transmission and is transmitted separately to another subscriber station during the pauses detected. The breaks can occur at the same time or independently of time.

The subscriber station informs the base station of possible transmission modes by means of appropriate signaling. For example, data in several channels are only transmitted to a subscriber station simultaneously within a time slot if the subscriber station can also evaluate these channels simultaneously (as with different spreading codes, for example). If the data is read from several queues, simultaneous transmission in several transmission channels is possible. The data are reassembled on the receiving side.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to drawings.

Show

1 shows a block diagram of a radio communication system, in particular a mobile radio system,

2 shows a schematic representation of a transmission channel, FIG. 3 shows a transmission of data of low priority in the breaks of the transmission of real-time data of high priority,

4 shows addressing and numbering of the data by means of bit sequences, 5 shows a transmission of data of low priority with bit sequences for addressing and numbering,

6 different ciphers of real-time data of high priority and data of low priority, FIG. 7 ciphering of real-time data and addressing and numbering of data of low priority,

8 shows a schematic representation of the sequence of the method according to the invention, and

9 shows a schematic illustration of a network-side device.

The radio communication system shown in FIG. 1 and designed as an example as a mobile radio system consists of a large number of mobile switching centers SGSN, which are networked with one another or provide access to a fixed network PDN. Furthermore, these mobile switching centers SGSN are each connected to at least one device for allocating radio resources RNC. Each of these RNC devices in turn enables a connection to at least one base station BS.

This base station BS is a radio station which establishes and signals communication connections to mobile or stationary subscriber stations MS, MSI, MS1, MS2 and MS3 via a radio interface. The functionality of this structure is used by the method according to the invention. Use in, for example, a wireless subscriber line system (access network) is also possible.

In the subscriber stations MS, MSI, MSI \ MS2 and MS3, a receiving device EE for receiving data d1, dl and d2, which are sent by the base station BS, is implemented. An identification device IE, also implemented, is used to identify data d1, dl ^λ and d2 addressed to the subscriber station MS, MSI, MS1 \ MS21 and MS3. Between the base station BS and two subscriber station MSI and MS1 ^Λ transmission channels DCH, DCH "are dl for undelayed transfer of real time data, dl ^x exclusively assigned. These transmission channels DCH, DCH are designed for the maximum values strongly fluctuating data rates. Especially time-critical applications with widely varying data rates , which must be transmitted without delay, such as video transmissions or voice transmissions with an interruption in transmission during speech pauses (VAD, Voice Activity Detection), require an exclusively assigned transmission channel DCH, DCH ^λ for these services, in which the transmission of real-time data not be delayed by the transmission of low priority data to further subscriber stations MS2, MS3.

Shared transmission channels DSCH, however, are not exclusively assigned to a transmission to several subscriber stations MS2 and MS3. They are used for non-time-critical, delayed transmissions of data packets to different subscriber stations MS2, MS3. For this purpose, the transfer is also assigned (allocated). The assignment is made via a separate signaling channel and delays the transmission by a period of time that is unacceptable for the transmission of real-time data dl, dl ^Λ .

In addition, according to the invention, data d2 of low priority are additionally transmitted in two transmission channels DCH, DCH during the breaks in the transmission of the real-time data d1, dl ^{λ of} high priority. In one embodiment of the invention, the low-priority data d2 is transmitted in the breaks, for example two real-time transmissions. The low-priority data d2 are thus transmitted to the subscriber station MS via two transmission channels DCH and DCH ^λ . These measures are suitable, the statistical mean waiting time for the next transmission of data d2 is lower

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• P- d rt üd tf H Φ φ d O φ P- P ⁾ Φ Φ PJ CΛ PJ cn rt N

Ω d ti CΛ 3 Hl Φ d d φ CL N> P 'ti uq li er TJ p- ω P "d ö TJ tr d rt Hi Φ d

CL PJ φ φ d TJ ti PJ uq CΛ φ • d PJ 3 P- CL P "uq PJ ti cn φ d:

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P- M 3 ⁾ P> u rt rt Φ rt Φ uq r5 P- ti tr α d Φ α Φ CL yd P- P- ti dl φ P- d rt tr CΛ d Φ ti Φ O P- fi Φ li Φ CΛ P ¹ d CΛ cn o Φ d rt P- φ Hi ii C P- PJ J d Φ CΛ d O Φ ti TJ rt H rt Φ φ P- C

O P- rt O Hl d ⁾ • P- rt 3 W Φ d

H d ti Φ CL rt d Φ P- cn uq d H φ • CL d rt O rt Φ 3 £ P- CL φ CL P> et P "P-. CL cn odd • - • Φ d CL ti φ Φ α CΛ σ CΛ P "S ^ CΛ rt X Φ uq

P er P ¹ uq CL d ti d ti £ Φ Φ P- pj: CL Pf H d Φ rt

P er P- φ N d ti d CΛ et ü 3 ti Hi Φ Φ rt N - rt Φ ¹ d ti • P- d Φ d fi er φ dhd uq t≥, PJ Φ ti • d er ti d et uq CΛ Ω P- φ ii

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O: he

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H ti d TJ tr ti ti φ ti ti et rt Φ rt d rt P- φ Φ ti PJ φ O: ti d P- PJ J Φ CΛ tr d rt Φ PJ er Φ dh PJ Φ NJ P ¹ t ti PJ φ Φ cn 3 φ 1 ii rt tr ö φ P- 1 φ? P ⁾ cn ti rt Φ

Φ CL

PJ 1 P- Φ P- Hl tr 1 H 1 1 1 1 φ Φ rt d P- 1 1 rt 1 1 d Φ

The bit sequences AK, NK are correspondingly short to ensure transmission of the real-time data d1. The length of the bit sequence for addressing the data d2 low priority ent ^¬ speaking varies the number of subscriber stations MS. As an alternative to this embodiment, only the bit ^¬ follow AK to address or just the bit sequence NK numbering with transmitted.

FIG. 5 shows an example of an arrangement of real-time data d1 high priority and data d2 low priority with bit sequences NK, AK for addressing and numbering. Between the data d1, d2 and the bit sequences AK, NK, for example, transmission pauses are used to separate them.

Another embodiment of the method according to the invention can be seen in FIG. 6. The real-time data d1 and the data d2, d3, d4 of low priority are encrypted differently. The subscriber station-specific data d1, d2, d3 or d4 to be transmitted are encrypted differently for the respective subscriber station MSI, MS2, MS3 or MS4. A subscriber station MSI can only decrypt the data dl specifically encrypted for it. All other subscriber stations MS2, MS3, MS4 decrypt this data dl as faulty and they discard the data dl.

A numbering or addressing, as mentioned above, is necessary when using a different encryption of the data d1, d2 if an ARQ method is to be used.

FIG. 7 shows a combination of the methods of encryption and the use of bit sequences for addressing. In order to differentiate the methods of encryption and addressing by the subscriber station MS, MSI, MSI ^x (see also FIG. 1), an identifier KN, for example a signal bit, is introduced to signal the respective method. In this example, the real-time data dl are generated using the Sl encryption of data d2 low priority under shoot ^¬ while data d2 low priority are distinguished by the bit sequence AK to address the. In particular when using an ARQ method, the repeated transmission of incorrectly received data d2, the identifier signals the only encrypted data d1 as not readable and evaluable for an ARQ method.

In addition - but not shown in FIGS. 5 and 7 - all data d1, d2, with the exception of the identifier KN and addressing AK, can be identified by a bit sequence AK for addressing from the subscriber station MS, MSI, MSI ^Λ as to the subscriber station MS, MSI, MSI ^x addressed can be recognized, encrypted. This ensures that the transmitted data d1, d2 are secure against eavesdropping.

A schematic representation of the sequence of the method steps is shown in FIG. 8. The sequence is divided into two parts, the signaling before transmission and the process flow during transmission. In the signaling, to set up a communication connection between a base station BS and a subscriber station MS, MSI, MSI, a service required for the transmission of data d1, d2 is first requested (see FIG. 1).

A high quality service is, for example, a transmission of real-time data d1. To determine the service, quality of service parameters DGP are transmitted to the base station BS. These quality of service parameters DGP contain, for example, a required maximum bit rate, a guaranteed bit rate, an average bit rate, a transfer delay or an access delay.

According to the invention, the quality of service parameters DGP are evaluated. The evaluation shows, for example, that real-time data d1 should be transmitted without delay. This corresponds to a service with a high quality of service, ie with OO N> MP ¹

Cπ o Cπ o Cπ o Cπ

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Φ H PJ O: cn P- CL Φ d Φ ti PJ φ 3 Φ cn P ¹ PJ P- φ P> uq φ H d φ! -? rt d Ω CΛ

HO rt ti d TJ rt Φ 3 d P "d P- tr P- TJ P- EP rt P" d ti Φ ti d φ uq tr Hi tr er d PJ d P- Φ 3 uq ≤ CL uq ti rt P ¹ P- Ω rt cn Hi CL φ ti N cn d cn Φ Φ

PJ d 3 Φ φ H o Φ Φ φ cn Φ φ tr TJ P- Z Φ <d O: Z yr d H

P- Φ uq φ d P "Φ a er d ti ti Ω Cn CL CL P ⁾ Φ φ TJ ti Φ rt ^¬ d uq φ α P> P- 1 er P- rt Φ P- rt Φ tr • • Φ P - cn cn d ti p- PJ ti cn P- φ ti P ¹ d Φ <d CL Φ Cπ P ¹ ti uq NH TJ Φ P> d uq Z P- cn Φ CΛ d σ N TJ Φ li rt PJ d Φ

CL Φ φ H α O rt φ d ZH P- rt P "φ d Φ d Φ CΛ P- O: ti CL rt d Φ P ¹ H

Φ ti Φ uq d ti P- TJ P- d P- P ¹ P- P- α d Φ Φ uq Φ ti Φ d X 3 N

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CL d cn P ¹ _^ <HOP ¹ uq N d CL PJ φ P- er φ H et 1 rt ld P ⁾ dd ^ω φ dd = O Cπ Φ er er d CL dd ti rt P- CL Φ er TJ Φ Φ CΛ d CL uq P- cfl d ti uq rt uq ti P- Φ Z d P- α d cn ^ rt uq et J P- Φ DJ d P- rt uq J φ d P- CL

Φ P- Z er d ti P- uq φ d: Φ d J Cfl "^ φ er Cfl d fi ti 1 φ ω o rt

NC 1 CΛ P- P- CL tr ti er 3 Hi P "• _^ cn Hl Φ Φ rt P ⁾ C do Hl ti CL ü tsi d φ TJ Ω fi dd P ⁾ CL s Φ O cn o ti uq 3 ti 3 t \) Φ: OP ¹ CL P- PJ d ti fi PJ tr CL CL d Φ ti et α P ¹ CΛ d ii rt ii ⁾ φ p ^j rt ti Φ d φ rt uq ti Φ d uq er er HN rt er P- uq Φ od CL ti O: <uq rt dp Φ CL CL φ cn Φ H

<Ό PJ ti J d Φ N PJ ti Φ φ rt P- CL φ PJ EP Φ d Φ P- φ • »Φ P- rt φ p-

Φ PJ 3 "uq P ⁾ CL P- O: tr PJ ti d P- ti uq Φ ti d ti Φ H li uq • 3 Hi H)

H rt rt <rt φ d Φ cn uq P ¹ uq rt £ cn CL rt d ti tr uq CL cn CΛ rt d: Hl

Hl Φ Φ φ Φ d Hi cn TJ φ φ ti O: CL CΛ rt P- Φ d pj: ö H rt O P- t * l ti CΛ: d HH ti uq P- ti α d PJ uq ⁾ Ω φ uq Φ CL cn P- P ⁾ er • z O PJ uq d N φ CΛ Φ rt Φ uq E tr CL 3 P- rt Φ TJ uq rt z P- tr P ¹ CL Φ d C σ P- PJ d er Ω P ¹ Φ H d P- Z PJ> 3 P ⁾ α dd ti Φ P- P- ti P ^J P- ti d O d rt cn PJ tr cn H d Ω TJ φ cn P- X φ cn P- P ¹ HO ti CL Φ Φ N uq TJ CL P- P: dz Z 3 d uq tr PJ rt P- H CΛ W pj: d CL P- CL O: dd <rt rt φ φ ö O: CΛ cn yd P ¹ <rt 3 P- Ω EP TJ d Φ et uq

Cfl P- zd NP "P- PJ uq y Φ cn s: Φ - ^j PJ w Cfl tr rt ti £ Φ CL H er φ rr φ P- uq PJ s: P" cn rt P ¹ CL J P- Φ ti Φ Ω rt o rt P- CΛ p- α Φ H

Φ CL H d P- P- Z Φ Φ P- Φ d rt d H tr ti Φ tr d N N

CL o er d tr P- tr et ti d tr ti Ω H φ d Ω 3 P ⁾ rt pj: Φ rt Φ d H Hi Φ Φ er rt d φ P- Φ P ⁾ tr CL H PJ tr P 'er TJ - »P" et N uq 3 P- cn P- C- d Φ ti uq d uq Z cn d * «» rt he CL Φ <Φ rt üd he Φ φ PJ rt DJ: rt H φ cn ti PJ

CL φ φ rt CL ⁾ Φ uq M ti φ α cn P- α d P- Φ P- CΛ X rt pj: O p- rt rt uq φ ti p- P- d cn cn φ ti n rt d Φ P- rt H rt Ω P- P ⁾ N rt uq d H rt 3 d CΛ d CL Hl OP * er tr tα Φ ti cn ii rt α tr 3 rt P ¹ P- P- NJ d

Φ o

3 Φ uq UJ. Φ Φ op: tr CL P ⁾ ti PJ P ¹ PJ Φ P- PJ Φ CΛ d uq uq ≤

H rt ti Φ CL Φ P- 1 uq P "N rt Φ Φ rt PJ rt o P ¹ d Ω d Ω ti 1 d P-

1 J 1 1 P- rt d li rt Φ 1 Φ CΛ φ tP 1 1 1 tr Hi tr d φ

1 d 1 H 1 Φ uq

Breaks P is possible and accordingly the detection of the breaks P is controlled with a control device ST.

If, on the other hand, the difference between the maximum and average transmission rate of the real-time data d1 is relatively small and the ratio is below the threshold value, a high number of pauses P is rather unlikely. Detection of the pauses P is suppressed and no logical connections to further subscriber stations MS are set up for this transmission channel DCH. With the suppression of the detection, computing resources in the transmission-side network device BS are saved.

The logical connection for the transmission channel DCH enables a transmission of data d2 of low priority, that is to say of a low quality of service. Neither a short transfer or access delay nor a guaranteed bit rate can be made available to the service. Such low-quality services are provided for correspondingly low fees and allow non-time-critical transmissions, for example the transmission of an email.

With the determination of the transmission pauses P from the quality of service parameters DGP, the detection of the pauses P is triggered by a control ST. For this purpose, the control ST decides from the evaluation of the quality of service parameters whether the number and length of the breaks P is suitable for a non-time-critical transmission and, if necessary, controls the detection of the breaks P for one or a group of connections to partial subscriber stations MS. If the quality of service parameters DGP change, the control device ST can in turn interrupt a detection of the pauses P.

In the second section of the sequence, the process sequence, the real-time data d1 to be transmitted are encrypted specifically for the subscriber station MSI and transmitted without delay. Due to the signaling, the pauses P are co co KM P> P ¹ cπ o Cπ O Cπ o cn

I \) P "P ¹ o Cπ o cπ

cn CL d X CΛ N ≥! Φ α CL and CL d uq α Pf

Ω P- PJ P- Ω tr tr z φ P- P- the er N) d d Φ P> o

Φ Ω 3 φ er d Φ ti Φ -— CL d er ti

P- tr PJ P ¹ P- Φ φ O ti £ uq d _' Φ

Φ \ -> PJ d li σ tr rt CΛ σ P- d

CL & CL Φ da P ⁾ cn ti P ⁾ n CL CΛ M

P "Z Φ ti uq PJ O rt Ω DJ '-' tu Φ P- σ

P- φ ti φ ti Φ CL φ tr uq - • _* ti CL d

Ω ti et d rt d φ d PJ dd Φ Φ J tr er Φ ti P ¹ dd Φ φ fi P> cn d Φ a cn P- CL rt uq CL P- X CΛ d rt d N ti CΛ Ω d 3 N > Φ cn df ö rt cn

Φ uq PJ rt _^ tr Φ rt f CL φ φ Φ Φ tr HP "CL tr £ • DJ N> dd rt dd

<CL P ⁾ er P ⁾ Φ ti cn d - Cfl Φ Φ

Φ φ uq Φ d ti Φ PJ pj: £ £ P- Pf ti J ti ti CL d P- uq ti ^ ~ - cn d <rt d yr Φ d Cfl φ ^ Φ φ er φ O d P-

Φ Φ ti uq TJ d M d d rt d ti uq d tr ti n P- cn d α p- Φ cn ti Hl σ yr φ a a CL CΛ PJ TJ CSl d Φ CL

CΛ p- Φ JP ¹ CΛ) DJ nd p- Φ

P "d rt d cn ti CL tu cn Φ O ö d ti

DJ CL Φ pj: Z cn CL rt M X ti ti

CΛ d Pf P ^J Φ P- PJ Φ. O φ CL P ⁾ P- et rt d rt φ P- d ti cn £ ö DJ ti dd Ω er

Φ uq O cn CL uq Ω CΛ o rt d cn tr Φ d Λ ti ö φ φ tr er tu Φ 2 d rt ti uq Φ n £ cn ~ - d Ξ uq d d

<φ d tu Φ Φ rt P ⁾ d ^ s Φ ddo 3 _^ d P- φ ddd CL d α uq ti PJ: ö rt ^¬ rt P "uq P- α CL PJ uq rt E Ö cn Φ P ¹ Φ φ Cfl d CL cn CΛ d

Φ Φ d o. TJ ti rt d CL α Ω • _^ Φ rt Hl d

P- d d tπ ti Φ Φ ti o tr ti Φ uq

P ¹ CL _* Φ d tr a P- td ≤

<"> Ω ö CΛ uq Φ et φ Φ CL

PJ Φ a tr Φ N φ CL fi er ti ti φ

Hi ti PJ ö Φ rt z N ti N CL Φ rt rt ti rt Hi ti CΛ d Φ φ z d Ω CL ti Φ

PJ rt n CL Pf P- P- TJ ii tr P- rt N rt W

PJ tr Φ ffi rt CΛ ti φ H d Ω d ti Cfl CL O σ Ω P- CΛ d PJ ü tr

Z φ Ω Φ li Φ tr O φ d α uq P ⁾ rt

Φ d tr O ti Φ rt Φ ti d CL PJ d rt cn N d cn P ¹ ü d φ d P- CL rt d Φ φ

DJ rt Pf uq rt Φ CL φ uq 3 ö p-

& Hi d Φ σ rt Φ p: Φ CL d Cfl TJ Φ rt

PJ - uq P- N O cn rt P- Ω Pf O rt CL ti ti φ P-- PJ d ti TJ d tr CL PJ ti Φ P>

• d tr tr d Φ φ Z ti d pj: Pf rt d PJ - ^> CL d P- φ P- pj: ti rt Φ da Hl Ω ti Ω Hi P ¹ Φ P- d rt CΛ rt

• α a ö tr CL tr d: CL Φ d O

Φ Φ P ⁾ Φ Φ rt ti P ¹ d CL ti P- H ti d ti dd _*

1 cn -i rt d rt α cn P "d CL n d φ rt Φ 3 Φ CL • P- uq P- t Hl ti d

DJ 1 d Φ tr 1 d 1 CΛ Φ CL

1

Claims

claims

1. Method for the transmission of data in a radio communication system in which a transmission channel (DCH) between a network-side device (BS) and a subscriber station (MSI) is exclusively assigned for an undelayed transmission of real-time data (dl) of high priority, pauses on the transmission side (P) the transmission of the real-time data (dl) can be detected, while the detected pauses (P) temporarily exclude the exclusivity and in the transmission channel (DCH) a transmission of data (d2) low priority to other subscriber stations (MS) takes place.

2. The method of claim 1, wherein the priority is determined on the basis of quality of service parameters (DGP).

3. The method according to claim 2, in which the detection of the pauses (P) is controlled on the basis of the evaluation of the quality of service parameters (DGP).

4. The method as claimed in one of the preceding claims, in which the real-time data (dl) of high priority and the data (d2) of low priority are evaluated by the respective receiving subscriber station (MSI, MS) by evaluating a first transmitted bit sequence (AK) as to the subscriber station ( MSI, MS) can be recognized addressed.

5. The method according to claim 4, in which received received data (dl, d2) is detected, signaled to the transmission side and transmitted repeatedly by the latter.

6. The method according to any one of claims 1 to 3, wherein the real-time data (dl) high priority and the data (d2) low priority are encrypted differently.

7. The method according to claim 6, in which of the respective receiving subscriber station (MSI, MS) the real-time data (dl) high priority and the data (d2) low priority based on the encryption (SI, S2) than to the subscriber station (MSI, MS ) can be recognized addressed.

8. The method according to any one of the preceding claims, wherein the data (d2) of lower priority than packet data (d2) are transmitted.

9. The method according to claim 8, in which the packet data (d2) of low priority are temporarily stored in a queue (WS) before the transmission.

10. The method according to claim 8 or 9, wherein the packet data are numbered by means of a second bit sequence (NK) for repeated transmission.

11. The method as claimed in one of the preceding claims, in which the data (d2) of low priority are prepared and divided on the transmission side for separate transmission in a plurality of transmission channels (DCH, DCH ^λ ), during the detected pauses (P) to a further subscriber station (MS) are transmitted separately in a number of transmission channels (DCH, DCH ^X ), and are combined again at the receiving end in the subscriber station (MS).

12. Network-side installation (BS) of a radio communication system with

Transmission means (SE) for the transmission of data (dl, d2), an allocation device (ZE) for the exclusive allocation of a transmission channel (DCH) between a network-side input direction (BS) and a subscriber station (MSI) to real-time data (dl) high priority for an undelayed transmission, a detector (D) for the detection of pauses in the transmission (P) in the transmission of real-time data (dl), means (ST) for temporary Removal of the exclusivity of the assignment during the pauses detected and for the assignment of the transmission channel (DCH) to the data (d2) of low priority, and at least one device (WS) for intermediate storage of the data (d2) low priority.