Patent ID: 6885697
Filing Date: 2005-04-26
Classification: H04L

Abstract:
1. A communication device comprising: a transmission/reception unit that transmits and receives a data signal utilizing a plurality of sub carriers; an information storage unit that stores information as to whether each of the plurality of sub carriers is used for transmission or reception; and a control unit that changes the information stored in the information storage unit in compliance with a control instruction, wherein a transmission and reception process of the transmission/reception unit is controlled in accordance with the information stored in the information storage unit, so as to adjust a transmission band and a reception band so that a change from the transmission band to the reception band precedes a change from the reception band to the transmission band, and wherein the control instruction is transmitted and received using at least two dedicated sub carriers selected from the plurality of sub carriers such that the at least two dedicated sub carriers are allocated to frequency bands that are lower in frequency than frequency bands assigned to all other sub carriers.