基于停放车辆路边单元环境感知的车联网资源高效分配  

Efficient resource allocation with context-awareness for parked car road side unit-based Internet of vehicles

作　　者：秦鹏 和昊婷 赵雄文[1,2] 伏阳 张钰 王淼[1,2] 王硕[1,2] 武雪 QIN Peng;HE Haoting;ZHAO Xiongwen;FU Yang;ZHANG Yu;WANG Miao;WANG Shuo;WU Xue(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;Hebei Key Laboratory of Power Internet of Things Technology,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学河北省电力物联网技术重点实验室,河北保定071003

出　　处：《通信学报》2022年第7期113-125,共13页Journal on Communications

基　　金：河北省自然科学基金资助项目(No.F2022502017);新能源电力系统国家重点实验室开放课题基金资助项目(No.LAPS21018)。

摘　　要：为减少路边单元(RSU)部署,同时满足移动车辆用户对处理时延敏感和计算密集任务的需求,提出了基于停放车辆环境感知的资源分配算法。选择路边停放的车辆替代RSU为车辆用户提供服务,将停放时间作为选择停放车辆路边单元(PCRSU)的决策要素,分别在内容缓存和分发2个方面设计了减小需求响应时延的机制。在内容缓存方面,PCRSU通过感知用户历史搜索数据与兴趣点区域类型两类要素对用户进行个性化的内容推荐。在内容分发方面,PCRSU通过感知车辆用户的数据传输需求,对带宽进行高效分配。实验证明,与已有方法相比,所提算法能更合理地选择PCRSU,有效降低系统的需求响应时延,在保证网络覆盖的同时提升系统稳定性,并且能为车辆用户提供更加准确的服务内容。In order to reduce the number of road side unit(RSU)and meet the needs of mobile vehicle users for processing latency-sensitive and computation-intensive tasks,a context-aware resource allocation algorithm was pro-posed based on parked cars.Road side parked vehicles were selected to serve the vehicle users instead of RSU using parking time as a factor for determining whether a parked vehicle could become a parked car roadside unit(PCRSU).In order to further reduce the system response time,a mechanism was designed considering content caching and distribution.In respect to user content caching,PCRSU made personalized content recommendation for vehicle users with awareness by using two elements of user historical search data and point of interest(PoI)area type.In respect to content distribution,PCRSU allocated bandwidth efficiently by sensing the data transmission needs of vehicle users.Extensive experiments show that compared with the existing benchmark methods,the proposed algorithm can select PCRSU more reasonably,effectively reduce the demand response delay,improve the stability of the network while ensuring network coverage,and provide more accurate service content for vehicle users.

关 键 词：停放车辆路边单元 环境感知 车联网 内容推荐 资源分配 

分 类 号：TN92[电子电信—通信与信息系统]