COMMUNICATION APPARATUS ENABLING COEXISTENCE OF SYSTEMS

摘要

A frequency band is divided into N subchannels. Subchannels are first allocated for a power line communication system (A) having a higher priority, such as public communication or the like. Subchannels for a power line communication system (B) having a relatively lowpriority, such as in-home communication or the like, are allocated from free subchannels. In this case, the subchannels used by the power line communication system (A) having the high priority are limited to a plurality of consecutive subchannels from an upper side or a lower side of the frequency band.