Minimum expected delay-based routing protocol (MEDR) for Delay Tolerant Mobile Sensor Networks.

Minimum expected delay-based routing protocol (MEDR) for Delay Tolerant Mobile Sensor Networks.
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用于延迟容忍移动传感器网络的基于最小期望延迟的路由协议 (MEDR)

DOI:
10.3390/s100908348
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发表时间:
2010
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Gong H
Gong H
中科院分区:
其他
文献类型:
--
作者:
Feng Y;Liu M;Wang X;Gong H

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为延迟容忍移动传感器网络(DTMSNs)开发高效的路由协议是一项具有挑战性的工作,该网络具有若干独特特性,例如传感器移动性、间歇性连接、能量有限以及延迟容忍性。在本文中,我们提出了一种新的路由协议,称为基于最小期望延迟的路由(MEDR),它是为DTMSNs量身定制的。MEDR通过发现和利用移动传感器动态形成的连接路径实现了良好的路由性能。在MEDR中,每个传感器维护两个重要参数:最小期望延迟(MED)及其过期时间。根据MED,消息将被传递到与宿主节点至少有一条连接路径且与汇聚节点直接通信的期望延迟最短的传感器。由于网络拓扑结构不断变化,路径脆弱且不稳定,因此我们使用MED的过期时间来指示路径的有效时间,并避免错误传输。仿真结果表明,与其他DTMSN路由方法相比,所提出的MEDR实现了更高的消息传递率,同时具有更低的传输开销和数据传递延迟。
It is a challenging work to develop efficient routing protocols for Delay Tolerant Mobile Sensor Networks (DTMSNs), which have several unique characteristics such as sensor mobility, intermittent connectivity, energy limit, and delay tolerability. In this paper, we propose a new routing protocol called Minimum Expected Delay-based Routing (MEDR) tailored for DTMSNs. MEDR achieves a good routing performance by finding and using the connected paths formed dynamically by mobile sensors. In MEDR, each sensor maintains two important parameters: Minimum Expected Delay (MED) and its expiration time. According to MED, messages will be delivered to the sensor that has at least a connected path with their hosting nodes, and has the shortest expected delay to communication directly with the sink node. Because of the changing network topology, the path is fragile and volatile, so we use the expiration time of MED to indicate the valid time of the path, and avoid wrong transmissions. Simulation results show that the proposed MEDR achieves a higher message delivery ratio with lower transmission overhead and data delivery delay than other DTMSN routing approaches.
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