Method and arrangements for communication of channel quality...

H - Electricity – 04 – B

Patent

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Details

H04B 7/06 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2693372

The present invention relates to a mobile terminal device (401), a base station (400) and a method that make it possible to use a channel quality indicator, CQI, reporting format for CQI reporting from the mobile terminal device to the base station, which CQI reporting format depends on a selected transmit antenna configuration. The mobile terminal device (400) is arranged to receive a signal (404) from a number of transmit antennas, which signal includes a number of subcarriers (412), and to determine the CQI, reporting format for a collection of the subcarriers based on the selected transmit antenna configuration. The mobile terminal device is further arranged to determine a number of CQI values (409) relating to said subcarriers in accordance with the determined CQI reporting format and to transmit the CQI values to the base station in a feedback signal (408). The CQI reporting format is adapted to the selected transmit antenna configuration such that the granularity of CQI reporting depends on the selected transmit antenna configuration.

La présente invention concerne un dispositif terminal mobile (401), une station de base (400) et un procédé qui rendent possible l'utilisation d'un format de rapport d'un indicateur d'une qualité de canal, CQI, pour rapporter en CQI à partir du dispositif terminal mobile à la station de base, ce format de rapport CQI dépendant d'une configuration d'une antenne de transmission sélectionnée. Le dispositif terminal mobile (400) est arrangé pour recevoir un signal (404) provenant d'un certain nombre d'antennes de transmission, ce signal comprend un certain nombre d'ondes sous-porteuses (412), et pour déterminer le format de rapport CQI pour une collecte des ondes sous-porteuses sur la base de la configuration d'une antenne de transmission sélectionnée. Le dispositif terminal mobile est arrangé en outre pour déterminer un certain nombre de valeurs CQI (409) concernant lesdites ondes sous-porteuses conformément au format de rapport CQI déterminé et pour transmettre les valeurs CQI à la station de base dans un signal de réaction (408). Le format de rapport CQI est adapté à la configuration d'une antenne de transmission sélectionnée de telle sorte que la granularité du rapport CQI dépende de la configuration d'une antenne de transmission sélectionnée.

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