Communication controller and method for maintaining a...

Details Communication controller and method for maintaining a... Communication controller and method for maintaining a...

2005-12-13

2005-12-13

Ferguson, Keith (Department: 2683)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S436000, C455S437000, C455S440000, C455S442000, C455S426100, C455S422100, C455S553100, C370S331000, C370S332000, C370S334000, C370S351000, C370S352000, C370S355000, C370S357000

Reexamination Certificate

active

06975881

ABSTRACT:
The present invention provides a communication controller and a method for maintaining a communication connection during a cell reselection. The communication connection is maintained by changing between a first operating mode, such as a packet data mode, which does not support the maintenance of a communication connection throughout a cell reselection, and a second operating mode, such as a circuit switched mode, which does support maintenance of a communication connection during a handover. Use of a virtual mobile switching center in the base station subsystem facilitates the conversion and routing of circuit switched data, transmitted between the mobile subscriber and the base transceiver station, to the packet data network while in a circuit switched mode.

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GSM 3GPP TS 29.061 V3.10.0 (Jun. 2002) Technical Specification; 3rdGeneration Partnership Project; Technical Specification Group Core Network; Packet Domain; Interworking between the Public Land Mobile Network (PLMN) supporting Packet Based Services and Packet Data Networks (PDN) (Release 1999).

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