Patent ID: 8121077
Filing Date: 2012-02-21
Classification: H04B,H04W

Abstract:
1. A relay device comprising: a representative node determining unit configured to determine, when communication quality of said relay device does not meet predetermined quality and a representative node does not exist among at least one neighboring node, a channel used for intra-cluster communication in a cluster of said relay device to be a channel different from a channel used for intra-cluster communication in a neighboring cluster so that said relay device serves as the representative node, the cluster being formed of relay devices that share a common channel used for data communication, the intra-cluster communication being communication with at least another relay device in a same cluster, the at least one neighboring node being a neighboring relay device which can communicate with said relay device, the representative node being a representative relay device which determines a channel used for the intra-cluster communication; a notifying unit configured to notify the at least another relay device in the cluster of said relay device about the channel determined by said representative node determining unit; a joining unit configured to allow a neighboring node which is not associated with any cluster among the at least one neighboring node to join the cluster of said relay device by causing the neighboring node to use, for the intra-cluster communication, the channel determined by said representative node determining unit, when said relay device is the representative node; and a channel changing unit configured to change the channel used for the intra-cluster communication to the channel determined by said representative node determining unit of the representative node.