Abstract

Nodes in original S-MAC protocol just can visit the channel in the scheduling and listening stage. The working schema may result in data latency and high conflict. To solve those above problems, we split scheduling duty into multiple micro-duties. By using different micro-dispersed contention channel, the sensor nodes reduce the collision probability of the data. Aiming at detecting the fixed duty cycle in S-MAC protocol, on the basis of the micro-duty and buffer queue length, this paper presents an adaptive duty cycle and back-off algorithm. While using different back-off algorithm with different duty cycles, sensor node Fast-Binary Exponential Backoff and Conflict-Avoid-Binary exponential Backoff algorithm separated are applied to reduce data latency further reduce the conflict probability. Combining both of the improvements, we propose a modified S-MAC protocol. Comparing the performance of S-MAC protocol and Division-Multiple Access-Media Access Control (MDA-SMAC) protocol on the NS-2 simulation platform, the results show that MDA-SMAC protocol performs better in terms of energy consumption, latency, and effective throughput than S-MAC protocol

中文翻译：

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用于无线传感器网络的高能效MDA-SMAC协议

摘要

原始S-MAC中的节点协议只能在调度和侦听阶段访问信道。工作模式可能会导致数据延迟和高冲突。为了解决上述问题，我们将调度任务划分为多个微型任务。通过使用不同的微分散竞争通道，传感器节点可降低数据的冲突概率。针对S-MAC协议中固定占空比的检测，基于微占空比和缓冲区队列长度，提出了一种自适应占空比和补偿算法。在使用具有不同占空比的不同退避算法的同时，应用了分离的传感器节点快速二进制指数退避和冲突避免二进制指数退避算法来减少数据等待时间，从而进一步降低冲突概率。结合这两项改进，我们提出了一种改进的S-MAC协议。