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1. WO2008108708 - IMPROVED RETRANSMISSIONS IN A WIRELESS COMMUNICATIONS SYSTEM

Publication Number WO/2008/108708
Publication Date 12.09.2008
International Application No. PCT/SE2008/000181
International Filing Date 06.03.2008
IPC
H04L 1/18 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
12by using return channel
16in which the return channel carries supervisory signals, e.g. repetition request signals
18Automatic repetition systems, e.g. van Duuren system
H04B 7/15 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
CPC
H04B 7/15
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
H04L 1/0026
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
0023characterised by the signalling
0026Transmission of channel quality indication
H04L 1/0076
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
004by using forward error control
0076Distributed coding, e.g. network coding, involving channel coding
H04L 1/1607
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
12by using return channel
16in which the return channel carries supervisory signals, e.g. repetition request signals
1607Details of the supervisory signal
H04L 1/1819
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
12by using return channel
16in which the return channel carries supervisory signals, e.g. repetition request signals
18Automatic repetition systems, e.g. van Duuren system ; ; ARQ protocols
1812Hybrid protocols
1819with retransmission of additional or different redundancy
H04L 1/1825
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
12by using return channel
16in which the return channel carries supervisory signals, e.g. repetition request signals
18Automatic repetition systems, e.g. van Duuren system ; ; ARQ protocols
1825Adaptation of specific ARQ protocol parameters according to transmission conditions
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE]/[SE] (AllExceptUS)
  • LARSSON, Peter [SE]/[SE] (UsOnly)
Inventors
  • LARSSON, Peter
Agents
  • NILSSON, Charlotte
Priority Data
0700583-806.03.2007SE
0700584-606.03.2007SE
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVED RETRANSMISSIONS IN A WIRELESS COMMUNICATIONS SYSTEM
(FR) RETRANSMISSIONS AMÉLIORÉES DANS UN SYSTÈME DE COMMUNICATION SANS FIL
Abstract
(EN)
A method (800) for a communications system (100, 300), with a sender (110), which transmits data as packets to a receiver (120). The receiver transmits (805) quality values to the sender representing the reception quality of packets received with errors. The receiver stores (810) information regarding a number of received data packets, and there is a relay transceiver (130) between the sender and the receiver. Both the relay transceiver and the sender can encode (820) data packets into composite packets, and to transmit (825) composite packets to the receiver. Said stored information in the receiver (120) comprises the data in correctly received packets and information regarding the reception quality of packets received with errors and the data of those packets, and the stored information is used by the receiver to decode (835) composite packets, thereby extracting the data in the packets of the composite packets.
(FR)
L'invention concerne un procédé (800) pour un système de communication (100,300), pourvu d'un émetteur (110), qui transmet des données sous la forme de paquets à un récepteur (120). Le récepteur transmet (805) des valeurs de qualité à l'émetteur représentant la qualité de réception de paquets reçus avec des erreurs. Le récepteur stocke (810) des informations concernant plusieurs paquets de données reçus, et il y a un émetteur-récepteur relais (130) entre l'émetteur et le récepteur. L'émetteur-récepteur relais et l'émetteur peuvent encoder (820) des paquets de données sous la forme de paquets composites, et transmettre (825) des paquets composites au récepteur. Les informations stockées dans le récepteur (120) comprennent les données dans des paquets reçus correctement et des informations concernant la qualité de réception de paquets reçus avec des erreurs ainsi que les données de ces paquets, et les informations stockées sont utilisées par le récepteur pour décoder (835) des paquets composites, en extrayant ainsi les données dans les paquets des paquets composites.
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