Inter-cellular interference detection by canceling data...

H - Electricity – 04 – B

Patent

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Details

H04B 7/26 (2006.01) H04Q 7/22 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2109169

Within a cell of a TDMA mobile communication system, each mobile station transmits a control message on an up-link frame. On receiving it, the base station determines if the message quality is affected during transmission. A corruption status indication is stored into a position of a frame status memory corresponding to the up-link frame if the message quality is low. When the base station detects a frame identification contained in the received message, it erases the corruption status indication stored in a position identified by the detected frame identification, and transmits a control message on a down-link frame, containing the result of the quality determination. In response, the mobile station stores the identification of the frame of the message into a collision memory, and retransmits a copy of the up-link control message containing the frame identification.

€ l'intérieur d'une cellule d'un système de communication mobile AMRT, chaque station mobile transmet un message de contrôle sur une trame de liaison montante. Sur réception, la station de base détermine si la qualité du message est altérée pendant la transmission. Une indication d'état de corruption est stockée dans une position de mémoire d'état de trame correspondant à la trame de liaison montante si la qualité du message est faible. Lorsque la station de base détecte une identification de trame contenue dans le message reçu, elle efface l'indication d'état de corruption contenue dans une position identifiée par l'identification de trame détectée, et transmet un message de contrôle sur une trame de liaison descendante, contenant le résultat de la détermination de qualité. En réponse, la station mobile stocke l'identification de la trame du message dans une mémoire de collision, et retransmet une copie du message de contrôle de liaison ascendante contenant l'identification de trame.

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