Patent ID: 7403470
Filing Date: 2008-07-22
Classification: H04B,H04L

Abstract:
1. A method of operating a wireless terminal, comprising: during a first period of time including a first plurality of consecutive OFDM symbol transmission time periods, operating in a first mode of operation during which multiple OFDM tones are used simultaneously to transmit at least some user data in a first uplink signal to a first base station, the first signal having a first peak to average power ratio; during a second period of time, including a second plurality of consecutive OFDM symbol transmission time periods, operating in a second mode of operation during which at most one OFDM tone is used to transmit at least some user data in a second signal to a second base station, the second signal having a second peak to average power ratio which is different from said first peak to average power ratio, wherein said second peak to average power ratio is lower than said first peak to average power ratio; receiving user data from the first base station during said first period of time; transmitting acknowledgements to the first base station according to a first predetermined acknowledgement scheme; and receiving user data from the second base station during said second period of time without acknowledging receipt of said user data.