Contention Intensity based Distributed Coordination for V2V Safety Message Broadcast

摘要: In this paper, we propose a contention intensity based distributed coordination (CIDC) scheme for safety message broadcast. By exploiting the high-frequency and periodical features of broadcast, application-layer design CIDC enables each vehicle to estimate instantaneous channel in fully manner. With information, MAC layer allows vehicles adopt better access strategy compared 802.11p. This is because selects initial back-off counter new packet deterministically, i.e., on intensity, instead randomly. The proposed modeled, key performance indicators terms collision probability average delay, are derived. It shown that change selection leads system model completely different from classic Markov chain model. Moreover, CIDC, compatible with 802.11p, can achieve both much lower smaller delay 802.11p at cost small communication computation overhead. Extensive simulation results demonstrate effectiveness accurate erroneous estimation scenarios.