Reliability Guaranteed Efficient Data Gathering in Wireless Sensor Networks

摘要: Wireless sensor networks (WSNs) are widely applied in various industrial applications. In this paper, we present an efficient data gathering scheme that guarantees the Quality of Service and optimizes following network performance metrics as well end-to-end reliability WSNs: 1) minimum total energy consumption; 2) unit transmitting 3) maximum utilization efficiency defined lifetime per deployment. We first transform optimization problem into a to optimize parameters: deployed nodal number ${N} ^\ast $ ; placement ${d} transmission structure ${p} . Then, prove is solvable mathematically. For our observation, nodes close sink trend failed early since they consumed more with heavier relay traffic destined for sink, which seriously affects performance. The key point adopting lower requirements shorter distance near sink. Consequently, reduces consumption hotspot area. Meanwhile, it adopts higher farther far from make full use node residual energy, so without harming reliability. Numerical simulation results demonstrate optimal approach improves by 18%–48% utility 17%, desire level.