H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/216 (2006.01) H04B 7/005 (2006.01)
Patent
CA 2299575
A method for controlling the transmission power of the reverse common channel for a mobile station in a CDMA communication system. In the method, the mobile station transmits a preamble signal at predetermined periods with increasing transmission power. Upon receipt of an acknowledge signal from a base station, the mobile station accesses the reverse common channel. In order to avoid multiple mobile stations from simultaneously generating increasingly powerful and interfering transmissions, the method generates two transmission power control signals: one based on the measured strength of a signal received from the base station and the other based on an accumulated value of power control commands transmitted by the base station. These two signals are accumulated and used to control the preamble signal.
L'invention concerne un procédé de commande de la puissance de transmission d'un canal commun de retour, destiné à une station mobile d'un système de communication CDMA. Selon ledit procédé, la station mobile émet un signal de préambule à des moments prédéterminés avec une puissance de transmission croissante. Dès réception d'un signal d'accusé de réception en provenance d'une station de base, la station mobile accède au canal commun de retour. Afin d'éviter que plusieurs stations mobiles ne génèrent simultanément des transmissions de plus en plus puissantes et perturbatrices, le procédé génère deux signaux de commande de la puissance de transmission: l'un basé sur l'intensité mesurée du signal reçu de la station de base, et l'autre basé sur une valeur cumulée des instructions de commande de puissance transmises par la station de base. Ces deux signaux sont cumulés et utilisés pour commander le signal de préambule.
Ahn Jae-Min
Kim Young-Ky
Park Chang-Soo
Samsung Electronics Co. Ltd.
Smart & Biggar
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