一种基于簇首协调的时分多址路由协议

摘要

针对现有无线移动网络中采用竞争广播交互路由、控制信息,造成路由控制信息碰撞丢包的问题,提出了一种基于簇首协调的时分多址路由协议.该协议复合设计多址接入协议与路由协议,通过保障路由、控制信息的可靠传输,降低了传输延时,提高了数据传输效率.提出了一种基于超帧结构的多址接入协议,在超帧的控制信息交互阶段以时分多址的方式交互路由、控制信息,在数据信息交互阶段,以载波侦听碰撞避免的方式交互用户数据信息.为了控制节点之间的路由控制信息交互开销,簇首节点只为成功入网的节点分配时隙,并保证入网节点稳定地占有该时隙.成员节点通过交互两跳邻节点信息建立不超过3跳的簇内路由表,簇首节点通过控制信息交互获取全簇路由信息.仿真结果表明,在群组移动模式下,与AODV、OLSR等现有路由协议相比,所提出的协议在平均时延方面降低了23％,在传输效率方面提升了30％.%The broadcasting way for exchange of routing packets in wireless mobile network easily causes the packets lossing.A time division multiple access routing protocol (TDRP) based on cluster head coordination is proposed.The TDRP combines multiple access protocol and routing protocol.The transmission efficiency is improved,and the transmission delay is reduced by ensuring the reliable transmission of routing/control information.A multiple access protocol based on super frame structure is proposed.Under the manage span of the super frame,it uses TDMA for routing information exchange;and under the data span of the super frame,it uses CSMA/CA for data exchange.In order to control the media resources occupied by routing information,it designs the nodes login and logout processes so that the cluster head only distributes time slots for the nodes which have already joined the network successfully.Through the interaction of two-hop routing information between adjacent nodes,all nodes can get the three-hop routing table steadily,and the cluster head can get the complete routing table by the interaction of manage frames.The simulated results show that,compared with the existing AODV/OLSR routing protocol,the proposed protocol can reduce the average delay by 23％ and improve the transmission efficiency by 30％ under the mode of mobile group.