Patent ID: 8615049
Filing Date: 2013-12-24
Classification: H04B

Abstract:
1. A method of controlling co-channel interference in a base station of a wireless communication system based on collaborative MIMO, wherein the method comprises: a. sending a downlink reference signal to a served mobile station and at least one coordinating mobile station; b. receiving precoding information corresponding to a downlink signal from the base station to the served mobile station from the served mobile station; c. sending the received precoding information to at least one other serving base station of the at least one coordinating mobile station; d. receiving at least one precoding information corresponding to at least one downlink signal from the base station to the at least one coordinating mobile station respectively forwarded by at least one other serving base station of the at least one coordinating mobile station from the at least one coordinating mobile station; e. precoding a downlink signal from the base station to the served mobile station based on the precoding information corresponding to a downlink signal from the base station to the served mobile station, and precoding the at least one downlink signal from the base station to the at least one coordinating mobile station respectively based on the at least one precoding information corresponding to the at least one downlink signal from the base station to the at least one coordinating mobile station; wherein, between (b) and (e), the method comprises: m. receiving at least one precoding information corresponding to at least one precoding information of at least one downlink signal from the at least one other serving base station to the at least one coordinating mobile station respectively forwarded by at least one serving base station of the at least one coordinating mobile station from the at least one coordinating mobile station; n. sending the received at least one precoding information to the served mobile station; o. receiving at least one precoding information corresponding to at least one downlink signal from at least one other serving base station of the at least one coordinating mobile station to the served mobile station; p. sending the received at least one precoding information to at least one other serving base station of the at least one coordinating mobile station respectively.