Method and system for GSM mobile station roaming to IS-41
OwnerNikhil Jain, Gregory Heinzingerinventors
Life of this patent
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Abstract
A roaming gateway interfaces between a CDMA MSC and a GSM core infrastructure, so that a GSM-enabled CDMA mobile station having a subscription in the GSM system can roam into the CDMA system and be authenticated to use the CDMA system. The roaming gateway obtains necessary authentication information from the GSM system and transfers the information to the mobile station using a short message service.
Claims20
A roaming gateway configured for supporting communication between a CDMA mobile switching center (MSC) and a GSM core infrastructure to enable a mobile station (MS) subscribed in the GSM core infrastructure to communicate using the CDMA MSC, comprising:
- at least one register communicating with the GSM core infrastructure and with the MSC to convey authentication information from the GSM core infrastructure to the MS and to signal to the MSC to provide service to the MS.
A method for authenticating an MS subscribing in a first wireless system and roaming into a second wireless system, comprising:
- receiving location information from the MS;
- determining whether the MS is subscribed in the first system or second system;
- and
- if the MS is subscribed in the first system, registering the MS in the second system.
A system for servicing, using an IS-41 MSC, a cdma2000-1x or cdma2000-3x MS having a subscription in a GSM core infrastructure but not having a subscription in a CDMA core infrastructure associated with the IS-41 MSC, comprising:
- an IS-41 MSC;
- a CDMA RAN linking the MS with the IS-41 MSC;
- a roaming gateway communicating with the IS-41 MSC;
- and
- a GSM core infrastructure communicating with the roaming gateway.
Dependencies are inferred from the claim text.