WIRELESS SHARED SPECTRUM ACCESS CONTENTION BASED ON HARQ FEEDBACK

摘要

A first wireless device determines the duration of a clear channel assessment interval based on feedback signals before transmitting data to a second wireless device. The first wireless device receives feedback signals, such as acknowledgement (ACK) and negative acknowledgement (NAK) signals, from one or more second wireless devices. The first wireless device determines a ratio of NAK/ACK signals in the feedback signals for a predetermined amount of time. The first wireless device determines whether the wireless medium is free by monitoring for wireless signals during a clear channel assessment interval. The duration of the clear channel assessment interval is based on the ratio of NAK/ACK signals. If the wireless medium is free for the duration of the clear channel assessment, the first wireless device wirelessly transmits data to at least one of the second wireless devices.

主权项

1. A method comprising:
at a first wireless device, receiving feedback signals from one or more second wireless devices, the feedback signals comprising acknowledgement (ACK) signals and negative acknowledgement (NAK) signals; computing a ratio of NAK/ACK signals in the feedback signals for a predetermined period of time; determining whether a wireless medium is free by monitoring for wireless signals during a clear channel assessment interval; computing a duration of the clear channel assessment interval based on the ratio of NAK/ACK signals; and responsive to a determination that the wireless medium is free for the duration of the clear channel assessment, wirelessly transmitting data to at least one of the second wireless devices.