A dedicated channel acknowledgement protocol for multihop CDMA packet radio networks

Abstract

The authors present an acknowledgement scheme for receiver-directed code-division multiple-access (CDMA) networks that takes advantage of the inherent CDMA capabilities of the radios to ensure the success of acknowledgement transmissions with very high probability. This is accomplished by placing acknowledgements on a dedicated code channel that is guaranteed to be contention free. This results in a large improvement over the performance of acknowledgements on the normal data transmission channel. Throughput expressions are developed for the cases of perfect acknowledgement, normal acknowledgement, and dedicated channel acknowledgement.<>