A Modified CSMA Protocol for TH UWB Ad-hoc Network

초록

In this paper we propose and evaluate a novel busy medium detection method for TH UWB ad-hoc network. Because UWB has power contraints regulated by FCC, the conventional carrier sense multiple access (CSMA) schemes used in carrier based wireless systems can not fit for UWB systems. We give out our scheme to detect the busy medium and try to reduce the probability of collisions in TH UWB ad-hoc network. The spreading codes of the transmission node are used in the TH modulation and another PN sequence according to the destination node is also added to the modulation scheme to indicate the busy medium in transmission, thus potential collisions are avoided.