WO2003015310A1 - Procede de prise en charge de debits binaires variables dans un systeme cdma - Google Patents

Procede de prise en charge de debits binaires variables dans un systeme cdma Download PDF

Info

Publication number
WO2003015310A1
WO2003015310A1 PCT/US2001/041616 US0141616W WO03015310A1 WO 2003015310 A1 WO2003015310 A1 WO 2003015310A1 US 0141616 W US0141616 W US 0141616W WO 03015310 A1 WO03015310 A1 WO 03015310A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
data rate
receiver
user data
transmitting
Prior art date
Application number
PCT/US2001/041616
Other languages
English (en)
Inventor
Xiaoyang Lee
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to US10/485,971 priority Critical patent/US20050041629A1/en
Priority to PCT/US2001/041616 priority patent/WO2003015310A1/fr
Priority to JP2003520109A priority patent/JP2004538713A/ja
Priority to CNA018236308A priority patent/CN1547812A/zh
Publication of WO2003015310A1 publication Critical patent/WO2003015310A1/fr

Links

Classifications

    • 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

Definitions

  • CDMA Code Division Multiple Access
  • CDMA Code division multiple access
  • CDMA Code Division Multiple Access
  • Each subscriber unit's baseband data signal is multiplied by a code sequence which has a much higher rate than the data rate and is commonly referred to as a "spreading code”.
  • This coding results in a much wider transmission spectrum than the spectrum of the baseband data signal, and hence this technique is called “spread spectrum”.
  • Subscriber units and their communications can be discriminated by assigning a unique spreading code to each communication link. Since communications from different subscriber units are sent over the same frequency band, CDMA allows more users to access wireless networks simultaneously than with other conventional data communication techniques, such as time division multiple access or frequency division multiple access.
  • Variable rate service may vary the data rate from frame to frame depending on the application.
  • blind-rate detection is used to determine the data rate for a given frame received at a receiver.
  • the receiver must make a determination of the data rate of the received frame before processing the frame.
  • Each frame must be separately processed at each possible data rate before a determination is made regarding which data rate was utilized by the transmitter.
  • the greater the number of data rates supported by the service the more processing power and more complex the receiver. Therefore, it is desirable to provide a less complicated and highly reliable method for supporting variable data rates in CDMA system.
  • an improved method for supporting variable data rates between a transmitter and a receiver in a code division multiple access (CDMA) data communication system.
  • the method includes: providing a control channel and at least one application data channel between the transmitter and the receiver; transmitting user data from the transmitter via the application data channel to the receiver; transmitting a data rate indicator from the transmitter via the control channel to the receiver, where the data rate indicator is indicative of the data rate at which the user data is transmitted by the transmitter; and using the data rate indicator to decode the user data at the receiver.
  • CDMA code division multiple access
  • Figure 1 is a flowchart illustrating a method for supporting variable data rates in accordance with the present invention.
  • Figure 2 is a diagram illustrating the four different dedicated uplink channels that have been proposed for CDMA2000.
  • CDMA technology is typically deployed in cellular-type wireless network communication systems.
  • the service area is geographically divided into several adjacent zones of coverage called cells.
  • Each cell in the network has at least one base station that establishes communication links with various mobile stations located in or nearby the cell.
  • Base stations and mobile stations are transceivers capable of sending and receiving data signals as is well known in the art.
  • any communication link with the mobile station is maintained by passing the link to a base station in the adjacent cell. In this way, a mobile station can move from cell to cell without interruption to its communication link. While the following description is provided with reference to cellular-type wireless network system, it is readily understood that CDMA technology may be utilized in other types of data communication systems.
  • Figure 1 is a flowchart illustrating an improved method for supporting variable data rate transmissions between a transmitter and a receiver in a CDMA data communication system.
  • the communication link is configured to provide a dedicated control channel and at least one application data traffic channel between the transmitter and the receiver as noted in step 12. It is envisioned that the control channel will operate at a fixed data rate; whereas the application data channel can support variable data rates.
  • Data is transmitted in blocks of bits called frames, such that a data rate is specified as the number of bits transmitted per frame.
  • a data rate indicator is transmitted 14 by the transmitter via the control channel to the receiver simultaneously with the user data being transmitted 16 by the transmitter via the application data channel to the receiver.
  • the frame size employed by the control channel is shorter than the frame size employed by the application data channel.
  • a four bit binary indicator is preferably used to transmit the data rate to the receiver.
  • the value of the indicator correlates to a particular data rate (i.e., the number of bits per frame) and a corresponding frame duration.
  • a '0000' value for the indicator is indicative of the highest supported data rate and a '1111' value is indicative of the lowest supported data rate.
  • the data rate indicator as well as the corresponding data rate and frame duration are stored in a look-up table residing at the receiver. It is envisioned that the data rates are ordered from highest to lowest in look-up table.
  • the data rate indicator may embody the actual data rate used by the transmitter.
  • the receiver Upon receipt, the receiver decodes the data rate indicator received from the transmitter. Once the data rate is determined, the receiver can then decode the user data received via the application data channel from the transmitter as shown at step 18. In this way, the user data payload can be varied frame to frame.
  • the data rate indicator only needs to be transmitted when the data rate changes, it is envisioned that a data rate indicator may also be transmitted for each user data payload transmitted between the transmitter and the receiver.
  • base stations and mobile stations are each capable of performing transmitting and receiving functions. Transmissions from a base station to a mobile station are referred to as downlinks or forward channel communication links; whereas transmissions from a mobile station to a base station are referred to uplinks or reverse channel communication links. Thus, it is to understood that the above-described methodology is applicable to transmissions in either direction.
  • Various wideband CDMA standards have been proposed for use in third generation wireless personnel communication systems. Unlike earlier CDMA standards (e.g., IS-95), proposed wideband CDMA standards include one or more dedicated control channels which may be used to transmit a data rate indicator.
  • CDMA2000 The wideband CDMA standard proposed by the Telecommunications Industry Association (commonly referred to as "CDMA2000”) is one such wideband CDMA standard.
  • CDMA2000 the wideband CDMA standard proposed by the Telecommunications Industry Association
  • ETRI the wideband CDMA standard proposed by ETRI.
  • Figure 2 illustrates the four different dedicated uplink channels that have been proposed for CDMA2000.
  • a fundamental channel 22 and one or more supplemental channels 24 and 26 carry user data.
  • a dedicated control channel 28 carries control information, and a pilot channel 30 carries timing signals for uplink coherent detection.
  • the four uplink channels are separated by Walsh codes as is well known in the art.
  • user data is transmitted in either the fundamental channel 22 or one of the supplemental channels 24 and 26 in a frame length of 20 ms.
  • the dedicated control channel 28 is then used to transmit the data rate indicator.
  • the dedicated control channel 28 preferably employs a frame length of 5 ms having a fixed data rate.
  • CDMA2000 Fundamental and supplemental channels carry user data and a dedicated control channel carries control information.
  • the dedicated control channel is used to transmit the data rate indicator

Landscapes

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

Abstract

L'invention concerne un procédé amélioré (10) de prise en charge de taux binaires variables entre un émetteur et un récepteur dans un système de communication de données à accès multiples par répartition de code (CDMA). Ce procédé consiste à : fournir un canal de commande (12) et au moins un canal de données d'application entre l'émetteur et le récepteur; transmettre les données d'utilisateur (14) de l'émetteur au récepteur, via le canal de donnés d'application; transmettre un indicateur de débit binaire (16) de l'émetteur au récepteur, via le canal de données d'application, l'indicateur de données binaires correspondant au débit binaire auquel les données d'utilisateur sont transmises par l'émetteur; et enfin, utiliser l'indicateur de débit binaire pour décoder les données d'utilisateur (18) dans le récepteur.
PCT/US2001/041616 2001-08-07 2001-08-07 Procede de prise en charge de debits binaires variables dans un systeme cdma WO2003015310A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/485,971 US20050041629A1 (en) 2001-08-07 2001-08-07 Method for supporting variable data rates in a cdma system
PCT/US2001/041616 WO2003015310A1 (fr) 2001-08-07 2001-08-07 Procede de prise en charge de debits binaires variables dans un systeme cdma
JP2003520109A JP2004538713A (ja) 2001-08-07 2001-08-07 Ｃｄｍａシステムにおいて可変データレートをサポートするための方法
CNA018236308A CN1547812A (zh) 2001-08-07 2001-08-07 用于在码分多址系统中支持可变数据速率的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2001/041616 WO2003015310A1 (fr) 2001-08-07 2001-08-07 Procede de prise en charge de debits binaires variables dans un systeme cdma

Publications (1)

Publication Number Publication Date
WO2003015310A1 true WO2003015310A1 (fr) 2003-02-20

Family

ID=21742949

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/041616 WO2003015310A1 (fr) 2001-08-07 2001-08-07 Procede de prise en charge de debits binaires variables dans un systeme cdma

Country Status (3)

Country Link
JP (1) JP2004538713A (fr)
CN (1) CN1547812A (fr)
WO (1) WO2003015310A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005036913A1 (fr) * 2003-10-02 2005-04-21 Qualcomm Incorporated Systemes et procedes de multiplexage de donnees de commande pour canaux de donnees multiples sur un seul canal de commande
KR100712323B1 (ko) 2003-10-02 2007-05-02 삼성전자주식회사 패킷 통신 시스템에서 빠른 전송율 변화를 지원하는 역방향 전송율 스케쥴링 방법 및 장치
US7474643B2 (en) 2003-10-02 2009-01-06 Qualcomm Incorporated Systems and methods for communicating control data using multiple slot formats

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544156A (en) * 1994-04-29 1996-08-06 Telefonaktiebolaget Lm Ericsson Direct sequence CDMA coherent uplink detector
US5751761A (en) * 1993-07-20 1998-05-12 Qualcomm Incorporated System and method for orthogonal spread spectrum sequence generation in variable data rate systems
US6163524A (en) * 1998-10-19 2000-12-19 Telefonaktiebolaget Lm Ericsson (Publ) Code allocation in CDMA

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5751761A (en) * 1993-07-20 1998-05-12 Qualcomm Incorporated System and method for orthogonal spread spectrum sequence generation in variable data rate systems
US5544156A (en) * 1994-04-29 1996-08-06 Telefonaktiebolaget Lm Ericsson Direct sequence CDMA coherent uplink detector
US6163524A (en) * 1998-10-19 2000-12-19 Telefonaktiebolaget Lm Ericsson (Publ) Code allocation in CDMA

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005036913A1 (fr) * 2003-10-02 2005-04-21 Qualcomm Incorporated Systemes et procedes de multiplexage de donnees de commande pour canaux de donnees multiples sur un seul canal de commande
KR100712323B1 (ko) 2003-10-02 2007-05-02 삼성전자주식회사 패킷 통신 시스템에서 빠른 전송율 변화를 지원하는 역방향 전송율 스케쥴링 방법 및 장치
AU2004306724B2 (en) * 2003-10-02 2008-06-26 Qualcomm Incorporated Systems and methods for multiplexing control data for multiple data channels onto a single control channel
US7474643B2 (en) 2003-10-02 2009-01-06 Qualcomm Incorporated Systems and methods for communicating control data using multiple slot formats
AU2004306724C1 (en) * 2003-10-02 2009-01-22 Qualcomm Incorporated Systems and methods for multiplexing control data for multiple data channels onto a single control channel
US7613144B2 (en) 2003-10-02 2009-11-03 Qualcomm Incorporated Systems and methods for multiplexing control data for multiple data channels onto a single control channel
US8023474B2 (en) 2003-10-02 2011-09-20 Qualcomm Incorporated Systems and methods for communicating control data using multiple slot formats

Also Published As

Publication number Publication date
CN1547812A (zh) 2004-11-17
JP2004538713A (ja) 2004-12-24

Similar Documents

Publication Publication Date Title
RU2293441C2 (ru) Способ и устройство для мультиплексирования высокоскоростной передачи пакетных данных с передачей голоса/данных
KR100389663B1 (ko) 확산 스펙트럼 통신 시스템에서의 데이터 전송
EP0903019B1 (fr) Unite d'abonne pour systeme de transmission sans fil amdc
US5930230A (en) High data rate CDMA wireless communication system
US7508807B2 (en) Raising random access channel packet payload
AU2009243412B2 (en) Physical channel configuration signaling procedures
EP0981914B1 (fr) Unite d'abonne et procede utile dans un systeme de telecommunications sans fil
WO1993003558A1 (fr) Systeme de communication par etalement du spectre a plusieurs utilisateurs
KR100421798B1 (ko) Cdma 시스템에서의 병렬 정보 스트림 전송 방법
US8509195B2 (en) TDMA/CDMA user equipment
EP1418786B1 (fr) Procédé de transport d'informations de contrôle à liaison descendante pour un channel specialisé de liaison montante amélioré
US20050041629A1 (en) Method for supporting variable data rates in a cdma system
WO2003015310A1 (fr) Procede de prise en charge de debits binaires variables dans un systeme cdma
KR100472692B1 (ko) Cdma무선통신시스템용가입자유닛
AU2012205197A1 (en) Physical Channel Configuration Signaling Procedures

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS JP KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NO NZ PL PT RO RU SE SG SI SK SL TJ TM TR TT TZ UA US UZ VN YU ZA

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZW AM AZ BY KG KZ MD TJ TM AT BE CH CY DE DK ES FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW MR NE SN TD TG

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2003520109

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 20018236308

Country of ref document: CN

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWE Wipo information: entry into national phase

Ref document number: 10485971

Country of ref document: US

122 Ep: pct application non-entry in european phase