Patent ID: 6148190
Filing Date: 2000-11-14
Classification: H04W

Abstract:
In a radio telecommunications network having a serving mobile switching centre (MSC) serving a mobile station with an emergency (emergency MS), a method of reconnecting a disconnected emergency call between the emergency MS and a public safety answering point (PSAP) when a first reconnection attempt has resulted in a second MS being connected to the PSAP, said method comprising the steps of:determining by the PSAP that the emergency MS has not been reconnected;sending an alarm message from the PSAP to the serving MSC instructing the serving MSC to reattempt to page the emergency MS;paging first in a location area where the emergency MS was located when the emergency call was disconnected;paging second in a broadened paging area in the service area of the serving MSC;paging third in a plurality of MSCs utilizing a multi-exchange paging procedure;reconnecting the emergency MS to the PSAP if the emergency MS responds to the page attempt;determining whether a reconnection timer in the serving MSC has expired, upon determining that the emergency MS did not respond to the page attempt;instructing by the PSAP, a subscriber utilizing the second MS to turn off the second MS; andinstructing the serving MSC to restart the paging process.