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机构地区:[1]黄淮学院信息工程学院,河南驻马店463000
出 处:《西南师范大学学报(自然科学版)》2016年第11期170-176,共7页Journal of Southwest China Normal University(Natural Science Edition)
基 金:河南省科技发展计划项目(132102210463);河南省教育厅科学技术研究重点项目(13A520786)
摘 要:在无线传感网络WSN(wireless sensor network)中,传感节点依据不同的路由协议向Sink发送数据,传感节点一直处于工作状态,即无线工作周期RDC(Radio duty cycle)达到100%,加快了能量消耗,降低了网络寿命.为此,本文提出MUCBR(Mesh-under cluster-based routing)路由协议,降低RDC.MUBCR协议基于IEEE 802.15.4平台,并通过Contiki operating system进行实施.MUBCR协议采用Clustering技术,并结合Mesh-under路由协议,将网络划分不同的簇Cluster,并为每个Cluster选择一个簇头CH(Cluster head).CH给Cluster内成员随机分配工作时隙(time-reference).传感节点仅在自己的时隙内发送或接收数据,降低RDC.同时,通过随机分配时隙,降低了数据包传输的碰撞.通过Contiki operating system仿真,提出MUCBR的RDC低至0.08%,能量消耗也仅占同类算法RPL约40%、RIME约25%.与802.15.4标准相比,MUCBR的碰撞概率降低了40%.According to routing protocol, node in wireless sensor network (WSN) transmits data to sink. Sensor node has been in a working state, and Radio Duty Cycle (RDC) is up to 100% , which speeds up the energy consumption and reduces the network life. Therefore, the Mesh-under cluster-based routing (MUCBR) protocol is proposed in this paper to reduce the RDC, which perform the routing function with-in the IEEE 802. 15. 4 platform. MUCBR is implemented via the Contiki operating system (OS). MUCBR divides the sensor network into multiple clusters by clustering technique and mesh-under routing, and elect the Cluster Head (CH) in cluster. The CH in each cluster will assign a random time reference for each node within its cluster. This time reference is used by each node to start transmitting or receiving to reduce RDC. Moreover, by randomly assigned time reference, reduce the collision. The proposed algorithm has been implemented within the Contiki operating system. The simulations show that MUCBR achieve a RDC of 0. 08% , and radio energy of MUCBR is only 43% of the required energy by RIME and 21% by RPL , while reducing the impact of collision by 40% as compared to the 802. 15. 4 standard.
关 键 词:802.15.4 无线工作周期 链路层 簇 路由协议
分 类 号:TP212[自动化与计算机技术—检测技术与自动化装置]
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