Mobile query works in heterogeneous network environment based on wireless and wired network

whose communication link error rate is higher

and susceptible to interference and interruption.Real-time and high availability are required in mobile query.After comparing and analyzing the existing algorithms

in this paper based on the previous study about directed diffusion

integrating agent technology

the directed selecting mobile agent algorithm named DSMA is proposed.Finally

the experiments represent that the network delay of the proposed algorithm is higher than traditional mobile agent algorithm at low load

but at high load condition the delay is lower.Moreover

the speed of querying using DSMA algorithm is faster.Meanwhile

during the querying with DSMA

the energy differences between WSN nodes can be balanced and the overall life of network is improved.