Cluster-based multi-channel communications protocols in vehicle ad hoc networks
作者： Xi Zhang , Hang Su , Hsiao-hwa Chen
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摘要: The dedicated short range communications (DSRC) standard equipped with seven channels is designated for intelligent transportation system (ITS) applications to improve the driving safety and support networking services among moving vehicles. Making best use of DSRC multichannel architecture, we propose a cluster-based scheme, which integrates clustering contention-free/contention-based MAC protocols. In our proposed elected cluster-head (CH) vehicle functions as coordinator (like WLAN's basestation) collect/deliver real-time messages within its own cluster forward consolidated neighboring CHs. Also, CH controls channel-assignments cluster-member vehicles transmitting/receiving non-real-time traffics, makes wireless more efficiently utilized data transmissions. Our scheme uses contention-free (TDMA/broadcast) IEEE 802.11 such that delivery can be guaranteed. simulation results show significantly throughputs while guaranteeing
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