福建师范大学医学光电科学与技术教育部重点实验室,福建,福州,350007
纸质出版:2017
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徐哲鑫, 蔡苓玲, 郑丽丽, 等. VANET中基于协议序列及TDMA的混合信道接入机制[J]. 电子学报, 2017,45(6):1408-1414.
XU Zhe-xin, CAI Ling-ling, ZHENG Li-li, et al. A Hybrid Channel Access Mechanism Based on Protocol Sequences and TDMA for VANET[J]. Acta Electronica Sinica, 2017, 45(6): 1408-1414.
徐哲鑫, 蔡苓玲, 郑丽丽, 等. VANET中基于协议序列及TDMA的混合信道接入机制[J]. 电子学报, 2017,45(6):1408-1414. DOI: 10.3969/j.issn.0372-2112.2017.06.019.
XU Zhe-xin, CAI Ling-ling, ZHENG Li-li, et al. A Hybrid Channel Access Mechanism Based on Protocol Sequences and TDMA for VANET[J]. Acta Electronica Sinica, 2017, 45(6): 1408-1414. DOI: 10.3969/j.issn.0372-2112.2017.06.019.
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.
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