基于速龙码的WSNs传输功率控制重编程协议

Reprogramming protocol of WSNs with transmission power control based on raptor code

为了降低节点能耗,提高能量的利用率,提出了一种高效节能的基于速龙码(RC)的传输功率控制(RC-TPC)重编程协议。该协议分两个阶段完成数据传输,第一阶段各个节点更新自己的位置信息,形成最优化的拓扑结构。进入第二阶段后,根据优化的拓扑结构通过调整发送节点的传输功率和中继节点的累计选择次数,Sink节点选择适当的中继节点,使中继节点的传输功率和RC的开销达到最优化。此外,RC的编码方式使传输数据包发生的错误概率更小,减少了重编程过程中的冗余以保证网络负载的均匀分布,有效地实现了高效节能,从而提高整个网络的生存周期。理论分析与实验结果表明:与MNP协议和ATPC协议相比,RC-TPC协议用于传输的平均能量消耗降低17.2%。

In order to reduce node energy consumption and enhance energy utilization, propose a reprogramming protocol which is based on raptor code （RC） transmitting power control（RC-TPC）. It completes data transmission via two stages. The first stage is that each node self-updates its positioning information and the forms the most optimized topology structure. Then it comes to the second stage, by adjusting the transmission power of the starting node and the selecting number of relay node, Sink node selects proper relay nodes so that the transmission power of relay nodes and consumption of RC can be most optimized. Besides, the way of RC transmission reduces the data transmission errors,it also reduces the redundancy of reprogramming so as to ensure the uniform distribution of network load and effectively realizes the energy-saving, which further enhances the life cycle of the whole network. It is elaborated by both theoretical analysis and experimental result that compared with MNP and ATPC protocols, RC-TPC protocols reduces average energy consumption of transmission to 17.2 %.