关键词: 通用移动通信系统（UMTS）, 全球微波互联接入（WiMAX）, 异构网, 切换, 融合

Abstract: Universal Mobile Telecommunications System（UMTS） provides wider coverage for mobile users，while WiMAX can provide higher bandwidth access in the local hot spots.The combination of the distinct advantage of the two networks，offers seamless connection for areas in heterogeneous wireless networks.Based on analysis for convergence configuration and handoff technology of UMTS and WiMAX，this paper proposes a mechanism that uses Received Signal Strength（RSS），delaying level and delay time as a handoff benchmark judgment，the real-time traffic and non real-time traffic are distinguished during the judgment.The simulation results show that new mechanism effectively prevents the occurrence of a ping-pong effect，and decreases the delay meanwhile.

Key words: Universal Mobile Telecommunications System（UMTS）, Worldwide Interoperability for Microware Access（WiMAX）, heterogeneous networks, handoff, convergence