【摘要】 为了减少数据传递延迟,增加网络吞吐量和减少网络负载,提出一种状态轮换分组的MDDMAC(multi-divided deliver MAC)协议.将数据的发送和接收分开进行以减少碰撞和串音,并结合网络拓扑信息,实现节点分组状态轮换,降低网络延迟,减少耗能.OMNet++仿真结果表明:分组数为4的MDD-MAC在十字型网络中的端到端延迟和最大消息负载量分别比DW-MAC少67.59%和89.16%,比TMAC少72.49%和89.80%.在网格网络和随机网络中MDD-MAC的性能也优于DW-MAC和TMAC.更多还原

【Abstract】 In order to decrease the delivery latency,increase the throughput and lower the traffic loads,this paper presents MDD-MAC(multi-divided deliver MAC),a new synchronous MAC protocol with low delivery latency and low traffic loads.MDD-MAC minimizes collisions and overhearing by dividing data transmission cycle into two time slots,i.e.data sending slot and data receiving slot.To achieve low latency and energy-efficiency,MDD-MAC introduces an efficient group deliver mechanism by combining the topology information of network.We evaluate MDD-MAC on OMNet++ and compare it with DW-MAC and TMAC,two previous energy-efficient MAC protocols,under the scenarios of cross network,random networks and grid networks.In all experiments,MDD-MAC significantly outperforms those other protocols.For example,on scenarios of cross network with 43nodes,the delivery latency and maximum buffer load for MDD-MAC is 67.59%and 89.16%less than that of DW-MAC,and 72.49%and 89.80%less than that of TMAC respectively.Specially,the average collision times for DW-MAC and TMAC is 8and 34respectively while the MDD-MAC is almost zero.更多还原