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首页> 外文会议>Sensor Technologies and Applications, 2009. SENSORCOMM '09 >On the Relationship between Network Congestion and Local Contention in IEEE 802.15.4 Based Networks
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On the Relationship between Network Congestion and Local Contention in IEEE 802.15.4 Based Networks

机译：基于IEEE 802.15.4的网络中网络拥塞与本地竞争的关系

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摘要

Due to the specific operation of wireless sensor networks (WSN) and especially to the multi-hop nature of many WSNs, local contention can lead to network-wide congestion and reduce both the efficiency and the lifetime of the network. In this paper we study the interdependence between end-to-end congestion and local contention including different mobility patterns using three different application scenarios. In each of the scenarios discussed, all nodes send information to a sink which is the PAN coordinator. In the first one, all the nodes are static, in the second one the sink is static while the nodes are moving and in the third one the sink is static while the rest of the nodes are mobile. The work is based on the slotted CSMA/CA MAC adopted in IEEE 802.15.4 protocol specification for LR-WPAN. Results show the effects of changing local contention regulating parameters like activity periods, number of MAC layer retransmissions and transmission buffer size on the overall network congestion.
机译：由于无线传感器网络（WSN）的特定操作，尤其是由于许多WSN的多跳性质，本地争用会导致网络范围内的拥塞，并降低网络的效率和生存期。在本文中，我们使用三种不同的应用场景研究了端到端拥塞与包括不同移动性模式的本地争用之间的相互依赖性。在讨论的每种情况下，所有节点都将信息发送到作为PAN协调器的接收器。在第一个节点中，所有节点都是静态的；在第二个节点中，节点移动时，接收器是静态的；在第三个节点中，其余的节点是移动的，接收器是静态的。这项工作基于LR-WPAN的IEEE 802.15.4协议规范中采用的带槽CSMA / CA MAC。结果表明，更改本地争用调节参数（如活动时间，MAC层重传次数和传输缓冲区大小）对整个网络拥塞的影响。

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