A Novel Scheme to Detect the Busy Medium for TH UWB Ad-hoc Network

초록

In this paper, a novel busy medium detection method for TH UWB Ad-hoc network is proposed and evaluated. UWB is a carrierless wireless communication system and the carrier sense multiple access (CSMA) schemes used in carrier wireless systems can not be used in UWB systems any more. We give out our scheme to detect the busy medium and try to reduce the collisions probability 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 reception node is also added to the modulation scheme to indicate the statuses of the two working nodes. The other nodes which want to send packets to the target node can sense this information by the correlation value of the spreading codes and detect if the target node can receive a packet or not, thus potential collisions are avoided.