摘要
无线传感网络的链路状态可能很不稳定,链路丢包率与网络的有效性直接相关。现有的定向扩散路由算法没有考虑丢包率的影响,可能出现路由完全不可用的情况。本文提出了基于丢包率估计的定向扩散路由协议,首先在网络运行过程中,通过收集端到端的传输信息来估计链路丢包率;然后根据链路丢包率估计的结果,结合链路的时延状况,选择最优的链路进行数据传输。该算法从丢包率和时延两个方面来提高网络的服务质量,NS2下的仿真结果验证了该协议的有效性。
The link status of wireless sensor networks is very unstable, and the link packet loss rate is directly related to the effectiveness of the network. The directed diffusion routing algorithm does not consider the impact of packet loss rate, thus a constructed route may be entirely invalid because of high packet loss rate. In this paper, we propose a directed diffusion based routing protocol which additionally considers the link packet loss rate. First, the link packet loss rate is examined by collecting end to end data transmission information, and then the data packets are transmitted along the link with the lowest link packet loss rate and delay. This algorithm can improved the network quality of service in aspects of packet loss rate and link delay, and the simulation results show that this protocol is superior to other protocols in terms of end to end packet loss rate.
出处
《微计算机信息》
2010年第33期84-86,共3页
Control & Automation
基金
基金申请人:胡光岷
项目名称:大规模通信网络异常行为特征分析与提取关键技术研究
基金颁发部门:国家自然科学基金委(60872033)
关键词
路由
定向扩散
丢包率
梯度
route
directed diffusion
loss rate
gradient
