能量捕获无线传感网的信道质量和能量感知高传递率多播方案  

Link-quality and Energy Aware High-rate Multicast Scheme for Energy Harvesting Wireless Sensor Networks

作　　者：池凯凯[1,2] 戴志泉 李燕君[1] 程珍[1] 

机构地区：[1]浙江工业大学计算机科学与技术学院,杭州310023 [2]浙江省可视媒体智能处理技术研究重点实验室,杭州310023

出　　处：《计算机科学》2015年第B11期263-267,共5页Computer Science

基　　金：国家自然科学基金(61472367;61202204);浙江省自然科学基金(LY15F020029;LY15F020027)资助

摘　　要：能量捕获无线传感器网络(EH-WSNs)由于可以无限期持续工作而具有非常广泛的应用前景。目前已有的EH-WSNs单跳多播方案存在以下问题:没考虑到链路质量会动态变化、节点储能易发生溢出而浪费能量等。提出了一种高传递率、高能效的EH-WSNs单跳多播方案。该方案采用纠删码,综合考虑节点当前储能、能量捕获速率以及当前信道质量等3方面因素,分析出当前待接收数据块的正确接收数据包数目期望值,只有当该期望值大于等于一定值时或者如果不接收该数据块则将发生储能溢出时才接收该数据块,有效地降低了信道质量差造成数据块接收失败和节点储能溢出的发生频率,高效利用极其有限的捕获能量。仿真结果表明,相比已有方案,本方案能显著提高EHWSNs单跳多播的数据包成功传递率。As the energy harvesting wireless sensor networks（EH-WSNs） can work forever,they have a lot of promising applications. The available one-hop multicast schemes of EH-WSNs have the shortcomings that they have not taken the feature of dynamic link quality into account and waste the energy due to the overflow of energy storage, ect. This paper presented one energy-efficient one-hop multicast scheme with high packet delivery rate. This scheme integrates the erasure code and considers the node energy, energy harvesting rate and current link quality to analyze the expected number of correctly received packets of the follow data block. This scheme only let the sensor receive the block whose expected number of correctly received packets is greater than or equal to one threshold and the block followed by the occurrence of energy overflow once the sensor does not receive it, effectively reducing the occurrence probabilities of energy overflow and the failure decoding due to non-perfect link quality. Simulation results demonstrate that, compared to the available scheme,the proposed scheme is able to greatly improve the one-hop multicast packet delivery rate of EHWSNs.

关 键 词：无线传感器网络 能量捕获 单跳多播 数据包传递率 

分 类 号：TN911.2[电子电信—通信与信息系统]