Long-term interference mitigation in an asynchronous...

H - Electricity – 04 – W

Patent

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Details

H04W 72/08 (2009.01) H04W 52/24 (2009.01) H04W 84/04 (2009.01)

Patent

CA 2719031

Techniques for mitigating interference in a wireless communication network are described. A terminal may desire to communicate with a weaker serving base station and may observe high interference from a strong interfering base station. The two base stations may be asynchronous and have different frame timing. In an aspect, high interference may be mitigated by having the interfering base station reserve downlink and/or uplink resources. The interfering base station may transmit at a low power level or not at all on the reserved downlink resources to reduce interference to the terminal. Terminals served by the interfering base station may transmit at a low power level or not at all on the reserved uplink resources to reduce interference at the serving base station. The terminal may then be able to communicate with the serving base station.

L'invention concerne des techniques de réduction de brouillage dans un réseau de communication sans fil. Un terminal souhaitant communiquer avec une station de base de desserte plus faible risque de subir un puissant brouillage depuis une forte station de base brouilleuse. Les deux stations de base peuvent être asynchrones et avoir différents cadencements de trames. Selon un aspect, il est possible de réduire un puissant brouillage en faisant en sorte que la station de base brouilleuse réserve des ressources de liaison descendante et/ou de liaison montante. La station de base brouilleuse peut émettre à un faible niveau de puissance ou pas du tout sur les ressources de liaison descendante réservées afin de réduire le brouillage affectant le terminal. Les terminaux desservis par la station de base brouilleuse peuvent émettre à un faible niveau de puissance ou pas du tout sur les ressources de liaison montante réservées afin de réduire le brouillage au niveau de la station de base de desserte. Le terminal peut alors être en mesure de communiquer avec la station de base de desserte.

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