Telefonaktiebolaget Lm Ericsson (publ)

Jean-Pierre Brochu

Francois Sawyer

Donald Joong

Michel Corriveau

Jacques Raynauld

A method of handling SMS messages in a radio telecommunications network when an originating mobile station-based Short Message Entity (MS-SME) sends a SMS origination message while operating in a first Mobile Switching Center (MSC) and then moves into a second MSC before the MS-SME receives a SMS acknowledgement message. The method begins by including a R.sub.-- Transaction ID parameter in the SMS origination message sent over the Digital Traffic Channel (DTC) from the originating MS-SME to the first MSC. If the MS-SME moved back to an anchor MSC, a SMS.sub.-- Transaction ID (SMSTID) parameter is included in an ANSI-41 SMS Delivery Backward (SMDBACK) Invoke message sent from the first MSC to the anchor MSC. The SMSTID parameter utilizes information from the R.sub.-- Transaction ID parameter to enable the MS-SME to correlate a SMS acknowledgement message with the SME origination message. If the MS-SME moved to a new serving MSC, the SMSTID parameter is placed in a SMS Delivery Point-to-Point Acknowledgement (SMDPPACK) Invoke message, and sent from the anchor MSC to the new serving MSC. The information in the SMSTID parameter is used by the second MSC to send a SMS acknowledgement message to the originating MS-SME.

Method of handling short message service acknowledgement messages

A system and method for stopping call setup in a mobile telecommunication system having a home location register (HLR), a visiting mobile switching center (V-MSC) and a subscriber mobile station (MS). Upon determining that a call to the subscriber mobile station is being dropped by the calling party, or upon determining that calls are not to be routed to the mobile station when the mobile station is located in the service area of the V-MSC, a release resources message is transmitted to the HLR and the V-MSC stopping the paging process or releasing the system resources, including any such resources associated with seizure of a voice channel between the V-MSC and the MS.

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Montreal, Canada

Jean-Pierre Brochu