Patent ID: 8045580
Filing Date: 2011-10-25
Classification: H04B,H04J,H04L

Abstract:
1. A frequency bandwidth control method for controlling a frequency bandwidth when a first communication apparatus and a second communication apparatus communicate with full duplex by using two or more divided frequency bandwidths within a previously allocated whole frequency bandwidth, wherein frequency bandwidths which said first communication apparatus and said second communication apparatus use at data transmission are different frequency bandwidths, the bandwidth control method comprising the steps of: a bandwidth presumption step for presuming a first bandwidth required by said first communication apparatus at data transmission and a second bandwidth required by said second communication apparatus at data transmission; a bandwidth comparison step for comparing said first bandwidth with a first bandwidth used which said first communication apparatus currently uses and comparing said second bandwidth with a second bandwidth used which said second communication apparatus currently uses; and a bandwidth used determination step for determining a third bandwidth used by said first communication apparatus at data transmission and a fourth bandwidth used by said second communication apparatus at data transmission according to comparison results obtained by said bandwidth comparison step, wherein said determining said third bandwidth and said fourth bandwidth comprises: a first communication step for transmitting data by using said third bandwidth and for receiving data by using said fourth bandwidth, in said first communication apparatus; and a second communication step for transmitting data by using said fourth bandwidth and for receiving data by using said third bandwidth, in said second communication apparatus.