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1. WO2010033379 - METHODS AND SYSTEMS FOR TRANSMISSION MODE SELECTION IN A MULTI CHANNEL COMMUNICATION SYSTEM

Publication Number WO/2010/033379
Publication Date 25.03.2010
International Application No. PCT/US2009/055686
International Filing Date 02.09.2009
IPC
H04L 1/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
H04L 1/06 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
02by diversity reception
06using space diversity
H04L 1/20 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
20using signal-quality detector
CPC
H04L 1/0002
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
0002by adapting the transmission rate
H04L 1/0016
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
0015characterised by the adaptation strategy
0016involving special memory structures, e.g. look-up tables
H04L 1/0019
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
0015characterised by the adaptation strategy
0019in which mode-switching is based on a statistical approach
H04L 1/0025
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
0025Transmission of mode-switching indication
H04L 1/06
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
02by diversity reception
06using space diversity
H04L 1/20
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
20using signal quality detector
Applicants
  • QUALCOMM INCORPORATED [US]/[US] (AllExceptUS)
  • MEDVEDEV, Irina [US]/[US] (UsOnly)
  • KETCHUM, John W. [US]/[US] (UsOnly)
  • WALTON, J. Rodney [US]/[US] (UsOnly)
Inventors
  • MEDVEDEV, Irina
  • KETCHUM, John W.
  • WALTON, J. Rodney
Agents
  • FRANKS, Ross, L.
Priority Data
12/211,81116.09.2008US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHODS AND SYSTEMS FOR TRANSMISSION MODE SELECTION IN A MULTI CHANNEL COMMUNICATION SYSTEM
(FR) PROCÉDÉ ET SYSTÈME POUR LA SÉLECTION DE MODE DE TRANSMISSION DANS UN SYSTÈME DE COMMUNICATION À CANAUX MULTIPLES
Abstract
(EN) Techniques to select a suitable transmission mode for a data transmission in a multi channel communication system with multiple spatial channels having varying SNRs are presented in this disclosure. For certain embodiments, a closed-loop technique may be applied, in which back-off factors used to calculate an effective SNR value fed back to a transmitter are adjusted. An open-loop rate control scheme is also presented in which a transmitter may select a data rate and number of streams based on whether transmitted packets are received in error at a receiver.
(FR) L'invention concerne des techniques pour sélectionner un mode de transmission adéquat pour une transmission de données dans un système de communication à canaux multiples avec des canaux spatiaux multiples ayant des SNR variables. Pour certains modes de réalisation, une technique de boucle fermée peut être appliquée, dans laquelle des facteurs de réduction de puissance utilisés pour calculer un retour de valeur SNR effectif sur un émetteur sont adaptés. L'invention concerne également un plan de contrôle différentiel à boucle ouverte dans lequel un émetteur peut sélectionner un débit de données et un certain nombre de flux selon que des paquets transmis sont reçus en erreur au niveau d'un récepteur.
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