Abstract: To address coverage performance of wireless sensor networks issues,most studies have focused on the optimization of node placement, positioning, etc.，in a complex environment, pay less attention to the quantitative evalualion. The paper first analyzed the performance of the main factors affecting coverage. Secondly, the data fusion model and strategy were discussed to find a basis for model selection. Then from a theoretical point of view of the use of data fusion performance evaluation of the coverage under way and the relationship between the two, found integration of range and network density and coverage relationship, an optimal integration of environment related application range can be obtained by experiment or experience derived through the analysis of the approximate solution.

Key words: Data fusion, Wireless sensor network, Coverage, Connectivity