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1. 湖南理工学院复杂工业物流系统智能控制与优化湖南省重点实验室,湖南 岳阳 414000
2. 湖南大学嵌入式与网络计算湖南省重点实验室,湖南 长沙 410082
3. 北京邮电大学信息与通信工程学院,北京 100876
4. 湘潭大学信息工程学院,湖南 湘潭 411105
Online First:2019-03,
Published:25 March 2019
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Xin PENG, Qingyong DENG, Shujuan TIAN, et al. Data dissemination scheduling algorithm for V2R/V2V in multi-channel VANET[J]. Journal on Communications, 2019, 40(3): 92-101.
Xin PENG, Qingyong DENG, Shujuan TIAN, et al. Data dissemination scheduling algorithm for V2R/V2V in multi-channel VANET[J]. Journal on Communications, 2019, 40(3): 92-101. DOI: 10.11959/j.issn.1000-436x.2019060.
针对多信道车联网的数据传输需求,提出了 V2R/V2V 数据传输调度算法。算法首先根据车辆的数据传输请求生成初始调度操作,依初始调度操作之间的冲突关系构建初始调度冲突图和冲突矩阵。其次,在证明冲突矩阵具有半正定性的基础上,采用半定规划方法进行信道分配并完善调度冲突图。最后,根据车辆在服务区域的滞留时间和请求传输的数据量赋予其不同的服务权重,依据调度冲突图,结合 V2R/V2V 协作传输的方式分时完成调度。交通仿真实验表明,所提算法可以有效利用车联网的多信道特性,通过 V2R/V2V 协作传输调度改善了网络服务容量。
Considering that the data dissemination in multi-channel VANET (vehicular ad hoc network)
a cooperative data dissemination scheduling algorithm was introduced for V2R(vehicle to roadside unit) and V2V(vehicle to vehicle).The algorithm created initial scheduling operators according to data requisition of vehicles.Then
initial collision graph and collision matrix were generated based on the conflict among initial scheduling operators.After proving the positive semidefinite of collision matrix
SDP (semidefinite programming) was used to channel allocation and collision graph creation.The algorithm then assigned weights for each data requisition according to dwell time and data volume of vehicles in RSU service region.Furthermore
it selected maximum weighted independent set of collision graph.The goal was to satisfy the most urgent data requisitions by V2R/V2V cooperate transmission.Transportation simulation results demonstrate that the proposed solution effectively promotes the service capacity by utilizes the multichannel of VANET and V2R/V2V transmission scheduling.
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