3AJAY K, AMIT K B, KUMAR R. A mobile technologyfor hazard management system [ J ]. International Jour-nal of Computers & Technology, 2012,3(1) :66 -75.
4LIU Y H,YANG X H. Aware handoff algorithm basedon the location of the 3G and WIFI [ J ]. Advanced Ma-terials Research, 2013,76(3) :556 -560.