Patent ID: 6888822
Filing Date: 2005-05-03
Classification: H04W

Abstract:
1. A method of updating an association for a mobile unit from a service support node supporting packet switched services to a mobile switching center in a pool of mobile switching centers supporting circuit switched services, comprising the steps: receiving a routing area update at the service support node from a mobile unit being supported by the service support node; detecting a new assignment of the mobile unit to a mobile switching center in the pool of mobile switching centers after receipt of the routing area update, wherein said step of detecting an assignment of the mobile unit to a mobile switching center in the pool of mobile switching centers comprises the step of mapping a unique identification of the mobile unit to a mobile switching center in the pool of mobile switching centers according to a pre-specified algorithm, wherein said pre-specified algorithm maps the unique identification of the mobile unit into an index for access to a table storing a relation between the index and a mobile switching center in the pool of the mobile switching centers providing services to the mobile unit; and initiating an association update from the service support node to the mobile switching center assigned to the mobile unit after receipt of the routing area update.