Wcdma And Gsm Wireless Network Interoperability Parameter Optimization Studies

Since May 2009, China Unicom have completed the first phase of construction of WCDMA networks in China's major cities. However, breadth and depth of its coverage is still a considerable gap between the National WCDMA network and the existing GSM network. Full use of existing GSM network resources for achieving the rapid distribution network of China Unicom,'s WCDMA network is important.In the long period of time, we should adhere to the principle of a network, and GSM networks to WCDMA networks achieved through mutual operation between the network coverage extension and load balancing, WCDMA networks and GSM networks to achieve coordinated development.The principle of interoperability optimization shall be performed as follows: Reduce the existing GSM/GPRS network upgrade and reduce the number of switching between systems occur, try to let users enjoy the WCDMA 3G network services, using GSM/GPRS network to expand the coverage of WCDMA networks,3G users to maintain business continuityThis research involved 2G/3G interoperability, including re-election of 3G to 2G and 2G to 3G in idle mode re-election, CS domain switching 3G to 2G, PS domain 3G to 2G handover, PS domain 2G to 3G handover.