Telefonaktiebolaget Lm Ericsson (publ)

Gunnar Thrysin

John Walter Diachina

Gunnar Rydnell

Francis Lupien

Sara Mazur

Paul Lee

An integrated radio telecommunications network which integrates an ANSI-41 circuit switched network and a General Packet Radio Service (GPRS) packet data network to support a mobile station which operates in both the ANSI-41 network and the GPRS network. An interworking function interfaces a mobile switching center (MSC) in the ANSI-41 network with a serving GPRS switching node (SGSN) in the GPRS network by mapping circuit switched signaling utilized by the MSC into GPRS packet switched signaling utilized by the SGSN, and mapping GPRS packet switched signaling into circuit switched signaling. An interworking GPRS base station controller interfaces the SGSN with a GPRS/ANSI-136 base station which supports both ANSI-136 operations and GPRS operations. The interworking GPRS base station controller adapts the traffic signaling format utilized by the SGSN into an air interface traffic signaling format utilized by the GPRS/ANSI-136 base station. An authentication center interface passes the authentication state of the mobile station between an ANSI-41 home location register/authentication center (HLR/AC) in the ANSI-41 network, and a GPRS home location register/authentication center (HLR/AUC) in the GPRS network.

Integrated radio telecommunications network and method of interworking an ANSI-41 network and the general packet radio service (GPRS)

A method of obtaining cell specific information for a dual-mode mobile station (MS) operating in an overlaid network operating on different frequency bandwidths and time slot structures such as a combined D-AMPS and EDGE described in the ETSI Enhanced Data Rates for GSM Evolution (EDGE) specification. The combined networks operating on 30 kHz and 200 kHz respectively having a combined circuit switched and packet switched capability. An MS camping in packet mode is able to perform cell selection/reselection on a particular network by scanning and reading the appropriate control channels of the associated network. For example, in a first aspect of the invention, the MS periodically scans both the control channels on the 30 kHz network to read related cell information and the control channels of the 200 kHz network to read related cell information associated therewith. In a second aspect of the invention, the MS scans the 30 kHz control channels to read the cell information and, if cell reselection occurs, then scans the 200 kHz control channels. In a third aspect, the MS scans and reads the 200 kHz control channels for cell information and, in response to a page from the 30 kHz network, scans control channels associated with the 30 kHz network. A fourth aspect includes the situation where both 30 kHz and 200 kHz cells are coordinated. The MS can then scan and read the control channels from either network and obtain a pointer to the control channels of the other network.

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Linkoping, Sweden

Gunnar Thrysin