摘要
延迟容忍移动无线传感器网络(delay tolerant mobile sensor network,简称DTMSN)用于广泛数据收集.与传统的传感器网络不同,DTMSN具有节点移动性、间歇连通性并且能够容忍适当的延迟,因此传统传感器网络的数据收集算法不能适用.提出了一种基于相对距离感知的动态数据传输策略RDAD(relative distance-aware data delivery scheme).RDAD采用传感器节点到汇聚点(sinknode)的相对距离来计算节点传输概率的大小,并以此作为消息(message)传输时选择下一跳的依据.为优化复本管理,RDAD引入消息的生存时间ST(survival time)和消息最大复制数MR(maximal replication)决定队列中消息传递的优先顺序和丢弃原则.模拟实验表明,与现有的几种DTMSN数据传输算法相比,RDAD能够以较低的数据传输能耗和传输延迟获得较高的数据传输成功率,并且具有相对较长的网络寿命.
The delay tolerant mobile sensor network （DTMSN） is a type of sensor network used for pervasive information gathering. DTMSN distinguishes itself from conventional sensor networks by several unique characteristics such as sensor mobility, loose connectivity, and delay tolerability. Therefore, traditional data gathering methods cannot be applied. In this paper, a novel data gathering method named relative distance-aware data delivery scheme （RDAD） is proposed. RDAD introduces a simple non-GPS method with small overhead to gain the relative distance from a node to sink and then to calculate the node delivery probability which gives a guidance to message transmission. RDAD also employs the message survival time and message maximal replication to decide message＇s transmission and dropping for minimizing transmission overhead. Simulation results have shown that the proposed RDAD data delivery scheme does not only achieve a relatively long network lifetime but also get the higher message delivery ratio with lower transmission overhead and data delivery delay than other DTMSN data delivering approaches.
出处
《软件学报》
EI
CSCD
北大核心
2010年第3期490-504,共15页
Journal of Software
基金
国家自然科学基金Nos.60703114
60673154
60903158
国家重点基础研究发展计划(973)No.2006CB303000
国家高技术研究发展计划(863)No.2007AA01Z443
电子科技大学校青年基金Nos.L08010601JX0746
L08010601JX0747~~
关键词
延迟容忍移动无线传感器网络
数据收集
动态数据传输
选择复制
队列管理
DTMSN （delay tolerant mobile sensor network）
data gathering
dynamic data delivery
selective replication
queue management
