WO2002058423A1 - Procede de transfert de signaux dans un systeme de radiocommunication - Google Patents

Procede de transfert de signaux dans un systeme de radiocommunication Download PDF

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Publication number
WO2002058423A1
WO2002058423A1 PCT/DE2002/000106 DE0200106W WO02058423A1 WO 2002058423 A1 WO2002058423 A1 WO 2002058423A1 DE 0200106 W DE0200106 W DE 0200106W WO 02058423 A1 WO02058423 A1 WO 02058423A1
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WO
WIPO (PCT)
Prior art keywords
transmission
channel
base station
shared
packet data
Prior art date
Application number
PCT/DE2002/000106
Other languages
German (de)
English (en)
Inventor
Fariba Raji
Axel Meiling
Joerg Schniedenharn
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to DE10290174T priority Critical patent/DE10290174D2/de
Publication of WO2002058423A1 publication Critical patent/WO2002058423A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the invention relates to a method for signal transmission in a radio communication system.
  • the invention is particularly suitable for use in a mobile radio system or wireless subscriber line system.
  • radio communication systems for example the second generation GSM (Global System for Mobile Communications) European mobile radio system
  • information for example voice, image information or other data
  • the radio interface relates to a connection between a base station and subscriber stations, it being possible for the subscriber stations to be mobile stations or fixed radio stations.
  • the electromagnetic waves are emitted with carrier frequencies that lie in a frequency band provided for the respective system.
  • UMTS Universal Mobile Telecommunication System
  • 3rd generation systems frequencies in the frequency band of approx. 2000 MHz are provided.
  • Two modes are provided for the third mobile radio generation, one mode denoting FDD operation (frequency division duplex) and the other mode denoting TDD operation (time division duplex). These modes are used in different frequency bands. Both modes support a so-called CDMA subscriber separation procedure (Code Division Multiple Access).
  • CDMA subscriber separation procedure Code Division Multiple Access
  • TDD Time Division Duplex Stream
  • TS 25.221 Physical Channels and mapping of transport Channels onto physical Channels (TDD)", VI.1.0, 1999-06, 3GPP, TSG, RAN, WGl, in particular Chapter 5.4,
  • FDD Physical Channels and mapping of transport Channels onto physical Channels
  • FDD Physical layer procedures
  • the receiver confirms with each packet data transmission whether the packet was received correctly or not. This is done, for example, by means of the ACK or NACK confirmation message. In order to notify the sender of this confirmation, it is necessary to provide the recipient with a respective return channel for the transmission of the confirmation message after each packet data transmission.
  • ARQ Automatic Repeat Request
  • the object of the invention is to provide a method for quickly assigning a return channel with a low signaling to specify expenditure. This object is achieved by the method according to the features of patent claim 1. Further developments of the invention can be found in the dependent claims.
  • packet data are transmitted via so-called shared channels, i.e. physical transmission channels used in parallel by several logical connections. These channels are occupied by several participants, for example in accordance with a time-division multiplex method. A participant thus receives this resource from the network for a limited time.
  • shared channels i.e. physical transmission channels used in parallel by several logical connections. These channels are occupied by several participants, for example in accordance with a time-division multiplex method. A participant thus receives this resource from the network for a limited time.
  • the shared channels for the uplink (UL - uplink) and downlink (DL - downlink) have been separately requested and allocated or assigned. This means that a subscriber who is assigned a packet data channel for the transmission of data packets in the downward direction must subsequently independently request a return channel for the transmission of the confirmation message.
  • a return channel in the UL is automatically implicitly or explicitly assigned when the forward channel (in the DL) is allocated for the packet data transmission. If a subscriber now receives packet data via the downlink channel (DL), for example only this subscriber can use the subsequent and previously allocated return channel for his packet data confirmation in the upward direction (UL). If the subsequent data in the downlink channel is intended for another subscriber, the subscriber uses the return channel.
  • the advantage of this method is the low and fast signaling of access to the return channel for all participants using this shared channel.
  • the configuration of the invention enables a more flexible allocation of the return channel. If the subscriber is informed that the data packets in the downlink channel are intended for him, it is possible to inform him of a certain resource for the return channel at the same time. Depending on the system status, this resource can be adapted for each data transfer.
  • the invention resides in the common access signaling of outbound and return channels, which are used by several participants in the
  • Time-division multiplexing This technique is particularly advantageous for the ARQ methods described.
  • FIG. 1 shows a block diagram of a radio communication system
  • FIG. 2 shows a schematic representation of the structure of a TDD radio interface
  • FIG. 3 shows a schematic structure of time slots for signal transmission within a time frame of a TDD radio interface to explain the method according to the invention.
  • a mobile radio system consists of a multiplicity of mobile switching centers MSC which belong to a switching network (SSS - Switching Subsystem) and are networked with one another or the Establish access to a fixed network, and each from one or more base station systems BSS (base station subsystem) connected to these mobile switching centers MSC.
  • a base station system BSS in turn has at least one device RNC (RNC - Radio Network Controller) for assigning radio resources and at least one base station NB (node B) connected to it.
  • RNC Radio Network Controller
  • a base station NB can set up connections to subscriber stations ME (Mobile Entity), such as mobile stations or other mobile and stationary terminals, via a radio interface.
  • ME Mobile Entity
  • At least one radio cell Z is formed by each base station NB.
  • the size of the radio cell is generally determined by the range of a general signaling channel (BCCH - Broadcast Control Channel), which is transmitted by the base station NB with a predetermined transmission power.
  • BCCH - Broadcast Control Channel a general signaling channel
  • several radio cells can also be supplied per base station NB. The functionality of this structure can be transferred to other radio communication systems in which the invention can be used, in particular to subscriber access networks for wireless subscriber connection.
  • the frame structure of the radio transmission in the TDD mode of a UMTS mobile radio system can be seen from FIG. 2.
  • a TDMA component time division multiple access
  • a division of a broadband frequency range into several time slots ts of the same duration for example 15 time slots ts0 to tsl4, is provided, which form a time frame fr.
  • a frequency band B extends over a certain frequency range.
  • Some of the time slots are used for signal transmission in the downward direction DL and some of the time slots in the upward direction UL.
  • An example is an asymmetry ratio of 3: 1 in favor of the downward tung DL shown.
  • the frequency band B for the upward direction UL corresponds to the frequency band B for the downward direction DL.
  • the same is repeated for other carrier frequencies.
  • the data d are spread individually for each connection with a fine structure, a spread code c, so that, for example, n connections can be separated at the receiving end by this CDMA component (code division multiple access).
  • the spreading of individual symbols of the data d causes that within the symbol duration T Sym Q
  • Chips of the duration T c i p are transmitted.
  • the Q chips form the connection-specific spreading code c.
  • FIG. 3 shows by arrows that in the time slot tsl one or more resources for a downlink
  • the subscriber station ME 1 receives packet data from the base station NB in the time slot tsl of the time frame fr 1.
  • the subscriber station ME 1 uses the or part of the return channel (uplink shared channel) in the time slot tsl4 of the same time frame for 1 for the subsequent transmission of a confirmation message to the base station NB, for example according to a described ARQ method, can be used exclusively.
  • the same procedure is used in the time frame for 2 carried out. In the time frame for 3, those are in the downlink
  • Shared channel transmitted packet data in the time slot ts 1 is determined for the subscriber station ME 2. Subsequently, the uplink shared channel (USCH) in the time slot ts 14 can be used exclusively for transmitting a confirmation message to the base station NB.
  • USCH uplink shared channel
  • the subscriber station can be explicitly signaled which signaling channel it should use to transmit the confirmation message. This can be done, for example, together with the signaling of the resource for the transmission of the packet data in the downward direction to the subscriber station.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Procédé de transfert de signaux dans un système de radiocommunication, dans lequel le transfert de signaux s'effectue sous la forme d'un transfert de paquets de données entre au moins une station de base et une station d'abonné, par l'intermédiaire d'un canal de transfert utilisé en commun, caractérisé en ce que lors de l'attribution d'une fraction au canal de transfert utilisé en commun, en vue du transfert de paquets de données en direction aval vers la station d'abonné, un canal de signalisation est attribué, implicitement ou explicitement, à la transmission d'une information de confirmation, en direction amont vers la station de base.
PCT/DE2002/000106 2001-01-17 2002-01-16 Procede de transfert de signaux dans un systeme de radiocommunication WO2002058423A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10290174T DE10290174D2 (de) 2001-01-17 2002-01-16 Verfahren zur Signalübertragung in einem Funk-Kommunikationssystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10101954.8 2001-01-17
DE10101954A DE10101954A1 (de) 2001-01-17 2001-01-17 Verfahren zur Signalübertragung in einem Funk-Kommunikationssystem

Publications (1)

Publication Number Publication Date
WO2002058423A1 true WO2002058423A1 (fr) 2002-07-25

Family

ID=7670855

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/000106 WO2002058423A1 (fr) 2001-01-17 2002-01-16 Procede de transfert de signaux dans un systeme de radiocommunication

Country Status (2)

Country Link
DE (2) DE10101954A1 (fr)
WO (1) WO2002058423A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5377192A (en) * 1990-11-13 1994-12-27 Cognito Limited Radio data communication system having means for reducing collisions between contending remote stations
EP0681406A1 (fr) * 1994-05-03 1995-11-08 Nokia Mobile Phones Ltd. Système de transmission de données par paquets pour interface radio numérique cellulaire à accès multiple à repartition dans le temps
WO2001091319A2 (fr) * 2000-05-19 2001-11-29 Tantivy Communications, Inc. Attribution automatique de canaux de retour dans un systeme de communication bidirectionnel a multiplexage temporel (tdm)

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5377192A (en) * 1990-11-13 1994-12-27 Cognito Limited Radio data communication system having means for reducing collisions between contending remote stations
EP0681406A1 (fr) * 1994-05-03 1995-11-08 Nokia Mobile Phones Ltd. Système de transmission de données par paquets pour interface radio numérique cellulaire à accès multiple à repartition dans le temps
WO2001091319A2 (fr) * 2000-05-19 2001-11-29 Tantivy Communications, Inc. Attribution automatique de canaux de retour dans un systeme de communication bidirectionnel a multiplexage temporel (tdm)

Also Published As

Publication number Publication date
DE10101954A1 (de) 2002-07-18
DE10290174D2 (de) 2003-12-11

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