Scheduling Beacon Transmission to Improve Delay for Receiver-initiated-MAC Based Wireless Sensor Networks
Scheduling Beacon Transmission to Improve Delay for Receiver-initiated-MAC Based Wireless Sensor Networks
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DOI：
10.2197/ipsjjip.26.140
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Akihiro Fujimoto;Yukari Masui;Takuya Yoshihiro
中科院分区：
文献类型：
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作者：
Akihiro Fujimoto;Yukari Masui;Takuya Yoshihiro
为了满足实际应用的需求，降低能耗成为无线传感器网络的首要问题，许多低能耗的MAC和路由协议被提出。减少传输延迟，事实上，在无线传感器网络的另一个有前途的要求，因为无线传感器网络的应用程序的很大一部分打算观看感测到的对象在真实的时间，虽然允许的延迟量根据情况而不同。在本文中，我们处理一类接收器发起的MAC协议，这是一个很有前途的能源效率的MAC机制，并提出调度信标定时，以减少数据包的传输延迟。其核心思想是按照从叶子节点到汇聚节点的距离顺序来调度信标的定时，减少分组在每个节点的停留时间。具体地，每个传感器节点基于它们的距离（即，跳数），并自主地调整其信标定时以避免帧冲突。计算机仿真结果表明，该协议可以收集数据在更短的时间内，更少的能量消耗比传统的接收机发起的MAC协议。
Many low-energy MAC and routing protocols have been proposed for Wireless Sensor Networks (WSNs) since reducing energy consumption is a primary concern to meet the requirements of practical applications. Reducing delivery delay is, indeed, another promising requirement in WSNs because a large part of applications of WSNs intends to watch the sensed objects in real time although the amount of allowable delay differs according to cases. In this paper, we deal with a class of receiver-initiated MAC protocols, which is a promising energy-efficient MAC mechanism, and propose to schedule beacon timings so as to reduce the delivery delay of data packets. The key idea is to schedule beacon timings in the sequence of distance from leaf node to the sink node and reduce the time of packets staying at each node. Specifically, each sensor node selects a time slot to send beacon in a distributed manner based on their distances (i.e., hop counts) from the sink node, and autonomously adjusts its beacon timing to avoid frame collisions. Computer simulations show that the proposed protocol can collect data in a shorter time with less energy consumption than the conventional receiver-initiated MAC protocols.