Signal strength measurement in a wireless communication system

H - Electricity – 04 – Q

Patent

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H04Q 7/34 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2235141

Methods and devices for measuring signal strengths by mobile stations in a wireless communication system are described. More particularly, while transmitting and receiving on a channel, signal strength measurements may be required. For instance, the received signal strength of broadcast information slots at the beginning of a superframe may be measured at predetermined times for several carriers. However, the mobile station may be busy performing information reception or transmission tasks. According to one exemplary embodiment, the signal strength measurments may be delayed when the mobile is transmitting and receiving on a channel, and then more frequent signal strength measurements may be made when there is no communication. In other words, the signal strength measurements do not have to occur uniformly in time, but may be more frequently performed if they have been delayed. Alternatively, the mobile station can "steal" one or more time slots to perform the signal strength measurements by ignoring its tasks of receiving and/or transmitting information.

L'invention concerne des procédés et des dispositifs permettant à des stations mobiles d'un système de radiocommunication de mesurer l'intensité d'un signal. Plus particulièrement, pendant l'émission et la réception sur un canal, des mesures de l'intensité d'un signal peuvent être nécessaires. Par exemple, on peut mesurer, à des moments prédéterminés pour plusieurs porteuses, l'intensité d'un signal reçu dans les créneaux temporels d'information de diffusion au début d'une supertrame. Mais la station mobile peut être occupée à des tâches de réception ou d'émission d'informations. Selon l'un des modes de réalisation exemplaires, il est possible de retarder les mesures de l'intensité d'un signal quand la station mobile est en train d'émettre ou de recevoir sur un canal, et d'effectuer des mesures plus fréquentes quand il n'y a pas de communication. En d'autres termes, il n'est pas obligatoire d'effectuer les mesures uniformément dans le temps, mais il est possible de les effectuer plus fréquemment si elles ont été retardées. En variante, la station mobile peut "voler" un ou plusieurs créneaux temporels pour effectuer les mesures de l'intensité, en omettant ses tâches de réception et/ou émission d'informations.

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