Handover of mobile radio calls between mobile switching centers

Details Handover of mobile radio calls between mobile switching centers Handover of mobile radio calls between mobile switching centers

H - Electricity

04

B

H04B 7/26 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2078194

-41- HANDOVER OF MOBILE RADIO CALLS BETWEEN MOBILE SWITCHING CENTERS Abstract This invention relates to apparatus and methods for providing cellular mobile telecommunication service in accordance with the requirements of the Global Systems for Mobile Communications (GSM) standard. A modular switching system is provided which performs the functions of the mobile switching center plus those of a home location register, authentication center, visitor location register, and equipment identity register. The latter functions are advantageously spread among the modules of the switching system, thus avoiding the getting started cost of expensive dedicated data bases. A wireless global switching module advantageously switches mobile communications control messages among the modules of the system and between the modules and the base station systems, and terminates signaling links between the mobile switching center and the base station systems. A of communications to a mobile station from a first base station to a second basestation, the first and second base stations being served by a first and second mobile telecommunications switching system, respectively, is accomplished by changing connections within a switching network of the first switching system from a first port and a second port, to the first port and a third port, the third port being connected via an interoffice trunk to the second base system.

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