通信学报 ›› 2021, Vol. 42 ›› Issue (3): 171-182.doi: 10.11959/j.issn.1000-436x.2021065
徐哲鑫, 高楷蒙, 贾文康, 吴怡
修回日期:
2020-12-20
出版日期:
2021-03-25
发布日期:
2021-03-01
作者简介:
徐哲鑫(1985- ),男,福建福州人,博士,福建师范大学副教授,主要研究方向为无线自组织网、车联网。基金资助:
Zhexin XU, Kaimeng GAO, Wenkang JIA, Yi WU
Revised:
2020-12-20
Online:
2021-03-25
Published:
2021-03-01
Supported by:
摘要:
为了解决城市环境下的 C-V2X 车辆拓扑高度动态化且车辆节点负载能力有限的问题,提高车辆缓存的利用率,减轻基站负荷,提出了负载约束下的车辆缓存节点选择算法。首先,通过定义链路稳定性度量,构建预测权重邻接矩阵,微观地描述车辆拓扑关系;其次,在负载约束和无重叠覆盖约束下构建目标函数,以最少的缓存节点实现全覆盖且最大化簇平均链路权重;最后,引入贪婪思想并合理定义节点状态,求解负载约束下车辆拓扑的最小支配集,并择优选择服务邻居节点。仿真结果表明,所提算法在缓存节点个数和簇平均链路权重均值方面接近全局最优,其重复应答率恒为零,请求应答率可达理论上界并可有效提高缓存源应答次数。
中图分类号:
徐哲鑫, 高楷蒙, 贾文康, 吴怡. 负载约束的C-V2X车辆缓存节点选择算法[J]. 通信学报, 2021, 42(3): 171-182.
Zhexin XU, Kaimeng GAO, Wenkang JIA, Yi WU. Vehicular cache nodes selection algorithm under load constraint in C-V2X[J]. Journal on Communications, 2021, 42(3): 171-182.
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