EP1135898A1 - Procede et systeme de communication destine a transmettre des donnees d'une association de plusieurs services par des canaux physiques utilises en commun - Google Patents

Procede et systeme de communication destine a transmettre des donnees d'une association de plusieurs services par des canaux physiques utilises en commun

Info

Publication number
EP1135898A1
EP1135898A1 EP99959368A EP99959368A EP1135898A1 EP 1135898 A1 EP1135898 A1 EP 1135898A1 EP 99959368 A EP99959368 A EP 99959368A EP 99959368 A EP99959368 A EP 99959368A EP 1135898 A1 EP1135898 A1 EP 1135898A1
Authority
EP
European Patent Office
Prior art keywords
combination
services
data rate
data
transport formats
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP99959368A
Other languages
German (de)
English (en)
Inventor
Michael Benz
Anja Klein
Armin Sitte
Thomas Ulrich
Volker Sommer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to EP99959368A priority Critical patent/EP1135898A1/fr
Publication of EP1135898A1 publication Critical patent/EP1135898A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0029—Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H04B7/264—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for data rate control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0031—Multiple signaling transmission

Definitions

  • the invention relates to a method and a communication system for the transmission of data of a combination of several services over shared physical channels, in particular in mobile radio systems with broadband radio channels.
  • a communication system provides one or more physical transmission channels for the transmission of data between a data source and a data sink.
  • the transmission channels can be of various types, e.g. for wired transmission with electrical or optical signals or for radio transmission via a radio interface using electromagnetic waves.
  • the radio transmission is dealt with in particular without restricting the generality of the field of application of the invention.
  • the radio transmission is used in mobile radio systems to establish a connection to non-stationary subscriber terminals.
  • a mobile station of a mobile radio system is such a non-stationary subscriber terminal.
  • the mobile station can request a connection from any location within the network coverage or a connection to the mobile station can be established.
  • GSM global system for mobile communications
  • the GSM mobile radio system is referred to as the 2nd generation system.
  • the 3rd generation of mobile communications which is currently standardized in Europe under the name UMTS (universal system for mobile communications) is in contrast provided to a plurality of services, the-earth within a transmission protocol via shared physi ⁇ channels to be transmitted.
  • UMTS universal system for mobile communications
  • the standardization documents ETSI SMG2 / UMTS L23 expert group, Tdoc SMG2 UMTS-23 257/98, from October 6, 1998, Tdoc SMG2 508/98 and Tdoc SMG2 515/98, from November 16, 1998, provide an overview of the current state of development of the standards ⁇ Discussion and in particular about the requirements as to how a transmission protocol can support the transport of data from several services.
  • a physical channel is quenzband example, by Fre ⁇ , a spreading code (CDMA code division multiple access) and, if a time slot within a frame defined.
  • mapping rule The following terms are used to describe the mapping rule:
  • a transport format defines a data rate, a coding, an interleaving, a data rate adjustment by puncturing and an error protection regulation of a transport channel for a service.
  • Transport Format Combination This term indicates a possible combination of transport formats of the various services that are mapped onto a common physical channel.
  • Transport Format Combination Set (TFCS):
  • a set of possible TFCs is hereby designated as a subset of all TFCs that are permitted for a specific connection.
  • Transport Format Combination Identifier This information indicates the currently used combination of transport formats within the TFCS.
  • transport formats can be found in ETSI SMG2 / UMTS L23 expert group, Tdoc SMG2 UMTS-23 257/98, from October 6, 1998, pp. 14-16.
  • the invention is based on the object of specifying a method and a communication system which reduce the required signaling capacity without restricting the number of possible combinations and their selection. This object is achieved by the method according to the features of claim 1 and the communication system with the features of claim 10. Advantageous further developments can be found in the subclaims.
  • the fact is used that, regardless of the combination of the transport formats, a total data rate for all services is known to the recipient.
  • This total data rate results from a previous resource division (number of spreading codes and / or time slots, spreading factor, etc.), by a so-called “blind detection” of the receiving side (determination of the data rate or spreading factor) during the detection or by detection of the currently used resources within the pool of allocated resources (
  • the specific total data rate is an implicit information for the combination of the transport formats, since only certain combinations are possible for a given total data rate. This exclusion of possible combinations for a given total data rate is used to reduce the signaling requirement.
  • the total data rate which is taken into account when determining the combination of the transport formats, indicates a bit or symbol rate before or after a channel coding.
  • the total data rate denotes the sum of all data rates of the physical channels to which the partial information relates.
  • the symbol rate after the channel coding indicates the rate on the physical channel or channels (for example the radio interface). Alternatively, the total data rate can also mean the useful bit rate.
  • a common reference size for the total data rate can be defined.
  • the symbol rate is determined by the spreading factor.
  • the data transmission takes place via a radio interface of a radio communication system.
  • a radio communication system e.g. UMTS
  • the transmission resources are particularly scarce.
  • the number of available frequency bands is limited and each operator can only use a certain part of it. Nevertheless, high data rates (up to 2 Mbit / s) should be offered for some services.
  • the invention has particular advantages in such a radio communication system.
  • a particularly flexible allocation strategy of transmission capacities to connections is made possible if a radio interface is formed by a broadband frequency channel (e.g. 5 MHz), signals in several physical channels that can be separated by spreading codes or additionally by time slots being transmitted simultaneously. By changing the spreading code or by assigning additional spreading codes, the transmission capacities can be quickly adapted to the requirements.
  • the invention is suitable both for use in the FDD (frequency division multiplex) and in the TDD (ti e division multiplex) mode of a radio communication system.
  • the partial information is transmitted in every frame of the data transmission of the common physical channel. This also results in a very quick change of the selected combination.
  • the joint transmission of data from several services can relate to one or more channels. In the case of a number of shared channels, the data from a number of services are mapped onto a coded common transport channel and the data from the coded common transport channel is in turn evenly distributed over a number of physical channels.
  • FIG. 1 shows a schematic representation of a radio communication system
  • FIG. 2 shows a layer model of the transmission protocols
  • FIG. 3, 4 shows data of different services on common physical channels
  • FIG. 5, 6 shows tables with a mapping rule below
  • FIG. 7 shows a frame-by-frame data transmission with in-band
  • the mobile radio system shown in FIG. 1 as an example of a radio communication system consists of a multiplicity of mobile switching centers MSC which are networked with one another or which provide access to a fixed network PSTN. Furthermore, these mobile switching centers MSC are each connected to at least one device RNM for controlling the transmission resources. Each of these devices RNM in turn enables a connection to at least one base station BS.
  • a base station BS can establish a connection to subscriber stations, for example mobile stations MS or other mobile and stationary terminals, via a radio interface. At least one radio cell is formed by each base station BS. 1 shows connections for the transmission of useful information between a base station BS and mobile stations MS.
  • a connection VI data from, for example, three services S (S1, S2, S3) within one or more physical channels Phy CH and signaling information, for example the allocated radio resources for a connection VI, are transmitted via a connection-accompanying control channel FACH (Forward link Access CHannel ) transfer.
  • An operation and maintenance center OMC implements control and maintenance functions for the mobile radio system or for parts thereof. The functionality of this structure can be transferred to other radio communication systems in which the invention can be used, in particular for subscriber access networks with a wireless subscriber connection.
  • data transmission means, receiving means and signaling means are provided both in the base stations BS and in the mobile stations MS, which communicate with one another.
  • the data transmission means serve to transmit data of a combination of several services S via the currently available common physical channels Phy CH.
  • the signaling means determine partial information TFCI on the selected combinations of transport formats for services S1, S2, S3 and carry out in-band signaling of the transport formats TF.
  • the layer model according to FIG. 2 shows a division of the
  • Layer 1 physical layer to describe all functions for bit transmission via a physical medium (e.g. coding, modulation, transmission power control, synchronization etc.),
  • Layer 2 Layer of the data connection to describe the
  • Layer 3 Network layer for controlling the resources of the radio interface.
  • the TFCS is defined for a connection, during which layer 2 is used to select a combination (a TFC) which, as shown later, is signaled using a TFCI in-band.
  • the exchange of parameters between layers 1 and 2 supports the functions of transferring frames with layer 2 data via the radio interface and displaying the status of layer 1 to higher layers.
  • the parameter exchange between layers 1 and 3 supports the control of the configuration of the transmission in layer 1 and generates system information about layer 1.
  • mapping of the data of different connections S onto a common physical channel Phy CH corresponds to the interaction of layers 1 and 2.
  • a mapping is a regulation according to which bit pattern the data are entered in a serial data sequence.
  • a demultiplexer / allocation means distributes the data of the encoded common transport channel CCTrCH to several physical channels Phy CH. Data of several services S1, S2, S3 are thus constantly transmitted via the physical channels Phy CH. No physical channel Phy CH is assigned to a service S1 or S2 or S3 alone but to the coded common transport channel CCTrCH with all its services S1, S2, S3.
  • FIG. 4 shows the image in a slightly modified form, it becoming clearer that only when physical channels Phy CH are shared by several services S1, S2, S3 is it necessary to signal the partial information TFCI. If a service S1 or S2 or S3 uses a physical channel Phy CH exclusively, the signaling of the partial information TFCI can be dispensed with.
  • the services S can be of various types.
  • Sl, S2 are services with high data rate dynamics, e.g. Sl is a video transmission and S2 is an internet connection
  • S3 is a service with low data rate dynamics, e.g. a voice transmission.
  • the selected combinations TFC of the transport formats TF are defined according to a first exemplary embodiment corresponding to FIG. 5, two different total data rates GR1, GR2 being possible.
  • the total data rate GR plays no role for binary-coded partial information TFCI of “0000”.
  • the combination TFC coded with “0000” is always TFC0. With the partial information "0001" is based on the total data rate
  • GR1 or GR2 differentiated into two different combinations TFCI or TFC2. This means that the number of combinations TFC that can be coded with 4 bits is greater than 2. In other words, a given number of TFC combinations can be encoded with fewer bits. However, it is also within the scope of the invention to use encodings other than binary.
  • the information about the total data rate GR is contained in a completely coded combination. However, this information is redundant and is replaced by partial information TFCI according to the invention.
  • a second exemplary embodiment according to FIG. 6 assumes a total of five different total data rates GR, the levels between the total data rates GR1 to GR5 being identical to the levels of the data rates of the transport formats TF for simplification.
  • Two services S1, S2 are supported, each of which can use four different transport formats TF11 to TF14 and TF21 to TF24.
  • the mapping rule manages with just one bit as partial information TFCI for eight possible combinations. The symbol "-" means that this value can be arbitrary.
  • TFC (TFü, TF i2 , ..TFi L i)
  • the partial information TFCI only specifies the possible combinations of services 1 to K-1, while the transport format TF of service K can be determined via the total data rate GR minus the data rates of the other services 1..K-1.
  • Service K is advantageously the one with the highest number of different transport formats. This results in the greatest reduction in the binary symbols required for coding.
  • the total data rate GR is transmitted in a fast connection-accompanying control channel FACH as a resource allocation (spreading code, spreading factor, time slot) or is obtained from the signals themselves according to a blind detection by the receiving side.
  • FACH fast connection-accompanying control channel
  • the in-band signaling of the partial information TFCI takes place according to FIG. 7.
  • a frame-wise transmission of data (data) together with further information there is also capacity for transmission of the currently selected combination of the transport formats in the form of the partial information TFCI.
  • a frame In FDD mode, a frame has a duration of 10 ms, bits of a pilot sequence (pilot) are used for channel estimation, bits (pc) are required for transmission power control, and bits are reserved for in-band signaling of the TFCI.
  • a data portion data with useful information follows. Error protection coding of the TFCI to, for example, 32 bits and scrambling of the useful information over several frames are not shown in FIG. 7.
  • the description of the selected transport formats applies to one direction of transmission.
  • Data can of course be transmitted in a connection in both transmission directions (UL upward direction from the mobile station MS to the base station BS and DL downward direction from the base station BS to the mobile station MS), it being possible for the data rates to be determined asymmetrically and accordingly different transport formats TF.

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

Abstract

L'invention a pour objet de réduire le coût de signalisation intra-bande. Pour ce faire, on se base sur le principe que, quelle que soit l'association momentanée des formats de transport de différents services transmis par des canaux physiques utilisés en commun, le récepteur connaît le débit binaire total de tous les services. On obtient ce débit binaire total à partir d'une assignation préalable des ressources (nombre code d'étalement et/ou créneaux temporels, facteur d'étalement etc.), par une "détection aveugle" effectuée par le récepteur (détermination du débit binaire ou du facteur d'étalement) pendant la détection ou par reconnaissance par le récepteur des ressources momentanément utilisées de l'ensemble des ressources assignées. Le débit binaire total précis est une information de disponibilité implicite pour l'association des formats de transport puisque, pour un débit binaire total donné, seules certaines combinaisons sont possibles. L'invention s'applique dans les systèmes mobiles de radiocommunication UMTS.
EP99959368A 1998-11-30 1999-11-30 Procede et systeme de communication destine a transmettre des donnees d'une association de plusieurs services par des canaux physiques utilises en commun Withdrawn EP1135898A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99959368A EP1135898A1 (fr) 1998-11-30 1999-11-30 Procede et systeme de communication destine a transmettre des donnees d'une association de plusieurs services par des canaux physiques utilises en commun

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP98122719A EP1006692A1 (fr) 1998-11-30 1998-11-30 Méthode et système de communication transportant une combination de services à travers un canal physique commun
EP98122719 1998-11-30
PCT/EP1999/009312 WO2000033516A1 (fr) 1998-11-30 1999-11-30 Procede et systeme de communication destine a transmettre des donnees d'une association de plusieurs services par des canaux physiques utilises en commun
EP99959368A EP1135898A1 (fr) 1998-11-30 1999-11-30 Procede et systeme de communication destine a transmettre des donnees d'une association de plusieurs services par des canaux physiques utilises en commun

Publications (1)

Publication Number Publication Date
EP1135898A1 true EP1135898A1 (fr) 2001-09-26

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP98122719A Withdrawn EP1006692A1 (fr) 1998-11-30 1998-11-30 Méthode et système de communication transportant une combination de services à travers un canal physique commun
EP99959368A Withdrawn EP1135898A1 (fr) 1998-11-30 1999-11-30 Procede et systeme de communication destine a transmettre des donnees d'une association de plusieurs services par des canaux physiques utilises en commun

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP98122719A Withdrawn EP1006692A1 (fr) 1998-11-30 1998-11-30 Méthode et système de communication transportant une combination de services à travers un canal physique commun

Country Status (2)

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EP (2) EP1006692A1 (fr)
WO (1) WO2000033516A1 (fr)

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KR100595147B1 (ko) * 1998-12-09 2006-08-30 엘지전자 주식회사 트랜스포트 채널 멀티플렉싱 정보 송수신 방법 및 이를 위한 송수신 장치
DE60044759D1 (de) 1999-11-18 2010-09-09 Lg Electronics Inc Verfahren zur Kodierung und Übertragung von Formatkombinationsindikatoren
KR100735402B1 (ko) * 2000-11-07 2007-07-04 삼성전자주식회사 비동기 이동통신시스템에서 하향 공유 채널에 사용하는 송신 형식 결합 지시기의 전송 장치 및 방법
GB2369006B (en) * 2000-11-10 2004-04-07 Nokia Mobile Phones Ltd Mapping of internet protocol based data
US6847623B1 (en) 2000-11-15 2005-01-25 Qualcomm Incorporated Method and apparatus for allocating data streams onto a single channel
CN1129297C (zh) 2000-12-14 2003-11-26 华为技术有限公司 多业务组合传输的方法
US7103020B2 (en) 2001-05-01 2006-09-05 Telefonaktiebolaget Lm Ericsson (Publ) PLMN radio interface with upper layer supervision of layer one transport channels
DE60215333T2 (de) * 2001-05-01 2007-05-24 Telefonaktiebolaget Lm Ericsson (Publ) Konfiguration der physicalischen schicht für eine funk schnittstelle
US7188300B2 (en) 2001-05-01 2007-03-06 Telefonaktiebolaget Lm Ericsson (Publ) Flexible layer one for radio interface to PLMN
DE10124765A1 (de) 2001-05-21 2002-11-28 Siemens Ag Verfahren zur Zuweisung von Kanälen in einem Funk-Kommunikationssystem
DE10159637C1 (de) * 2001-12-05 2003-08-07 Siemens Ag Verfahren zur Zuweisung von Übertragungskanälen in einer Mobilfunkzelle für einen Multicast-Dienst
KR100810281B1 (ko) 2002-03-30 2008-03-07 삼성전자주식회사 부호분할다중접속 이동통신시스템에서 전송 포맷 선택을위한 검색시간 최소화 방법
KR100566233B1 (ko) * 2003-11-15 2006-03-29 삼성전자주식회사 이동통신 시스템에서 단말의 데이터 레이트 전송 장치 및방법
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Also Published As

Publication number Publication date
EP1006692A1 (fr) 2000-06-07
WO2000033516A1 (fr) 2000-06-08

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