Importance

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Abstract

Reconnection of a mobile unit to a call session controlled by a first MSC is supported responsive to a network-initiated or mobile-originated reconnect attempt even in instances where the mobile unit has roamed to a border cell controlled by a second MSC. In a network-initiated reconnect attempt, the first MSC sends a suspended call page request to a second MSC. The second MSC pages the mobile unit, sets up a bearer channel to the mobile unit, and sends to the first MSC a suspended call page response including indicia of the bearer channel set up by the second MSC. The first MSC establishes a bearer channel to the second MSC thereby reconnecting the mobile unit to the call session. In a mobile-originated reconnect attempt, the mobile unit sends a mobile-originated reconnect message to the second MSC. If the second MSC does not find session information associated with the call, it sends a suspended call handoff request to the first MSC causing the first MSC to query a database to find indicia of the call session, establish a bearer channel to the second MSC and send to the second MSC a suspended call handoff acknowledgement including information associated with the call session. The second MSC establishes a bearer channel to the mobile unit thereby reconnecting the mobile unit to the call session.

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First Claim