In wireless sensor networks（ WSNs）

although the design of existing gateway node has introduced multiple network fusion transmission mode

but few take into account the performance of the entire gateway node

including throughput

packet loss rate

power consumption

cost overhead and so on

and rare deeply discuss multinetwork selection switching method. Aiming at this situation

introduce the concept of sensor node weights

from the start of different weights sensor nodes need different transmission strategy

for the purpose of data uploading Internet

present a framework of a gateway node access heterogeneous networks. In this framework

considering three aspects including throughput

power consumption and accessing cost

propose a multi-objective optimization model and then give a heuristic approximation algorithm. Experimental results show that under the premise of ensuring reliable data transmission and stable energy consumption in sensor networks

improve efficiency of data transmission and reduce costs of gateway access heterogeneous networks

provide a kind of reliable scheme for gateway to access heterogeneous network for data transmission.