Vehicular beaconing plays an important role to facilitate various applications in the paradigm of Internet of Vehicles(IoV). Due to high dynamic and resource limitation in IoV, how to schedule the vehicular beacon bro...Vehicular beaconing plays an important role to facilitate various applications in the paradigm of Internet of Vehicles(IoV). Due to high dynamic and resource limitation in IoV, how to schedule the vehicular beacon broadcast is challenging, especially in dense scenarios. In this paper, we investigate the beacon broadcast scheduling problem considering the Age of Information(AoI). We first propose an algorithm minimizing the expected sum of AoI considering the limited communication resource and vehicle mobility. Then the performance of the proposed algorithm is analyzed. With the proposed algorithm, the optimal solution can be obtained under certain conditions. Extensive simulations are conducted to verify the efficiency, effectiveness and fairness of the proposed solution.展开更多
无线传感网络的节点采用时隙CSMA/CA协议获取信道并广播数据。为了度量信息广播的时效性,提出了广播信息年龄(broadcast age of information,bAoI)的概念。广播信息年龄等于当前时刻减去刚刚广播成功的那个数据包的生成时刻。bAoI量化...无线传感网络的节点采用时隙CSMA/CA协议获取信道并广播数据。为了度量信息广播的时效性,提出了广播信息年龄(broadcast age of information,bAoI)的概念。广播信息年龄等于当前时刻减去刚刚广播成功的那个数据包的生成时刻。bAoI量化了每个节点的数据包的新鲜度,并且描述了节点在网络上快速广播数据包的能力。通过推导节点的传输概率和碰撞概率,建立了网络的等效传输模型。在此基础上研究和计算了网络的平均bAoI。通过仿真验证了平均bAoI随节点密度和到达率的变化规律。展开更多
基金supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC)China Scholarship Council (CSC)
文摘Vehicular beaconing plays an important role to facilitate various applications in the paradigm of Internet of Vehicles(IoV). Due to high dynamic and resource limitation in IoV, how to schedule the vehicular beacon broadcast is challenging, especially in dense scenarios. In this paper, we investigate the beacon broadcast scheduling problem considering the Age of Information(AoI). We first propose an algorithm minimizing the expected sum of AoI considering the limited communication resource and vehicle mobility. Then the performance of the proposed algorithm is analyzed. With the proposed algorithm, the optimal solution can be obtained under certain conditions. Extensive simulations are conducted to verify the efficiency, effectiveness and fairness of the proposed solution.
文摘无线传感网络的节点采用时隙CSMA/CA协议获取信道并广播数据。为了度量信息广播的时效性,提出了广播信息年龄(broadcast age of information,bAoI)的概念。广播信息年龄等于当前时刻减去刚刚广播成功的那个数据包的生成时刻。bAoI量化了每个节点的数据包的新鲜度,并且描述了节点在网络上快速广播数据包的能力。通过推导节点的传输概率和碰撞概率,建立了网络的等效传输模型。在此基础上研究和计算了网络的平均bAoI。通过仿真验证了平均bAoI随节点密度和到达率的变化规律。
