基于优先级的智慧道路无线网络资源预留模型

Resource Reservation Model for Intelligent Road Wireless Network Based on Priority

在智慧道路系统中,为区分不同类型和不同服务质量需求的数据流服务,提出一种基于优先级的资源预留模型。对不同服务质量需求的数据包进行优先级分类,放入不同的优先级队列,通过调度算法决定选取哪些数据包进行发送。当节点竞争得到信道后,采用资源预留机制抑制其他竞争节点的发送,直到剩下的相同优先级的数据包发送完毕。实验结果表明,该模型可有效地减少碰撞几率,提高信道利用率,并实现对不同优先级数据流的服务区分。

To differentiate data streaming services of different types and different requirements for Quality of Service （QoS） in intelligent Road （iRoad） systems, this paper proposes a resouce reservation model based on priority. The model classifies data packets of different QoS requirements into different priority queues, and the schedule algorithm decides data output sequence. When the node gets into channel successfully, it will restrain the transmission of other nodes by resouce reservation model, until the transmission of remaining data packets with the same priority is completed. Experimental results show that the proposd model effectively reduces the probability of collisions and improves channel utilization, and can realize service differentiation between data streams of different priorities.