Patent ID: 7826861

Claim:
A communication system comprising a first communication apparatus and a second communication apparatus, wherein the first communication apparatus comprises: reception means for receiving transmission power control information which is based on signal-to-interference ratio (SIR) measurement results in the second communication apparatus from the second communication apparatus; first control means for carrying out transmission power control of the first communication apparatus in accordance with a predetermined control pattern before the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus, the predetermined control pattern being fixed and invariable; and second control means for carrying out transmission power control of the first communication apparatus in accordance with the transmission power control information received from the second communication apparatus after the first communication apparatus becomes able to receive the transmission power control information from the second communication apparatus, and the second communication apparatus comprises: transmission means for transmitting the transmission power control information which is based on SIR measurement results in the second communication apparatus to the first communication apparatus.