Propose a strategy for virtual honeycomb-based structured energy-efficient single sink node relocation（ HEESR）. In this method

overall network coverage field is divided into several honeycomb virtual grid structure Sink node periodicly collect average residual energy of surrounding grids and residual energy of single node within grids and sink node is relocated based on these information. In order to increase energy efficiency

a radius adjustment strategy is used. Simulation shows that HEESR can significantly reduce energy consumption

improve network lifetime

compared with other methods of sink node relocation.