H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/02 (2006.01) H04B 7/15 (2006.01) H04L 12/56 (2006.01) H04L 27/26 (2006.01)
Patent
CA 2632191
A first aspect of the invention relates to a wireless relaying network having a number of network nodes including a designated originating node (10), at least one relaying node (20), and at least two receiving nodes (30). Basically, the designated originating node (10) transmits a pilot signal, and the relaying node(s) (20) receives and forwards the pilot signal to the receiving nodes (30), each of which measures channel quality based on the received pilot signal. In accordance with the invention, at least part of the receiving nodes (30) feed information on the measured channel quality all the way back to the designated originating node (10), and the originating node (10) then schedules data for transmission to at least one selected node of the receiving nodes (30) based on the received channel quality information. Subsequently, the designated originating node (10) transmits data to the selected receiving node(s) via the same relaying node(s) (20) that forwarded the pilot signal. In this way, multi-user diversity scheduling is introduced to relaying networks in a unique and efficient manner that provides significant data rate enhancements.
L'invention concerne, dans un premier aspect, un réseau relais sans fil ayant plusieurs noeuds de réseau comprenant un noeud d'origine désigné (10), au moins un noeud relais (20), et au moins deux noeuds de réception (30). Fondamentalement, le noeud d'origine désigné (10) émet un signal pilote, et les noeuds relais (20) reçoivent et transmettent le signal pilote aux noeuds de réception (30), dont chacun mesure la qualité du canal en fonction du signal pilote reçu. Selon l'invention, au moins une partie des noeuds de réception (30) fournit des informations sur la qualité mesurée du canal jusqu'au noeud d'origine désigné (10), ce dernier (10) programmant alors les données à transmettre à au moins un des noeuds de réception (30) choisis sur la base des informations reçues relatives à la qualité du canal. Par la suite, le noeud d'origine désigné (10) transmet les données aux noeuds de réception choisis par le biais des mêmes noeuds relais (20) qui ont transmis le signal pilote. Ainsi, une programmation de diversité multi-utilisateurs est offerte aux réseaux relais d'une manière unique et efficace qui apporte des améliorations importantes au niveau du débit binaire.
Nicolaescu Sawyer
Telefonaktiebolaget L. M. Ericsson (publ)
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