为了提高高速公路场景下用户平均有效数据吞吐量,提出车载自组织网络分布式信道接入机制.通过道路区段划分实现协议序列集复用;通过引入少量反馈并利用UI(User Irrepressibility)序列特性实现节点间接入顺序感知;同区段节点间利用分布式TDMA(Time Division Multiple Access)模式最大化吞吐量.仿真结果表明,其吞吐量性能优于经典的基于GNSS(Global Navigation Satellite Systems)的机制,并且物理层数据传输速率越大,节点通信半径越大,车辆密度越稀疏,其优势越明显.%In order to improve the average throughput performance of user effective data under highway scenario,a distributed channel access mechanism is proposed.The protocol sequence set is reused by road division.According to the characteristic of UI(User Irrepressibility) sequences,a few bits of feedback information are introduced for detecting the channel access order among nodes.Distributed TDMA(Time Division Multiple Access) is proposed for maximizing the throughput performance with a competition zone.The simulation results show that the throughput performance of UI-TDMA mechanism is more superior to classical method in a sparser distributed network or a higher PHY data rate or a larger communication range of node.
展开▼
