Patent ID: 8411637

Claim:
A method for dividing a subcarrier permutation zone for a first base station and a second base station in an Orthogonal Frequency Division Multiple Access system, comprising the following steps: a configuration unit performing configuration to subcarrier permutation zone division information for the first base station and the second base station, and sending the subcarrier permutation zone division information to a configuration synchronization unit; the configuration synchronization unit calculating a configuration effective frame number, wherein the configuration effective frame number is dependent on a maximum time delay required for synchronizing the first base station with the second base station, and sending the subcarrier permutation zone division information and the configuration effective frame number to the first base station and the second base station; the first base station dividing its frames into a first plurality of subcarrier permutation zones according to the subcarrier permutation zone division information and the configuration effective frame number; and the second base station dividing its frames into a second plurality of subcarrier permutation zones according to the subcarrier permutation zone division information and the configuration effective frame number such that, at any given moment, a first frame associated with the first base station and a first frame associated with the second base station have an identical permutation mode.