Telefonaktiebolaget Lm Ericsson (Publ)

Thierry Josse

Miguel Cobo Esteban

Peter Hans Edlund

Jose Javier Cabero Combarros

Jose Javier Combarros

In a method of routing a short message with high or low priority from a service center to a mobile station in a public land mobile network providing both packet data service and circuit switched service, a choice is made, in advance, as to whether the short message should be received by the mobile station either via a specific one of the services or via any of the services. Based upon this choice in step, the priority of the short message sent from the service center, and an indication of whether the mobile station is reachable via one, both or none of the services, a route via one of the services, a route via both services or no route at all is selected. If a route via one of the services is selected, the short message is routed in accordance with the selected route. If a route via both services is selected, the route via the service having a higher preference than the other service is selected, and the short message is routed in accordance with the route via said service having the higher preference. If the routing of the short message to the mobile station is unsuccessful via the route via said service having the higher preference, the short message is routed in accordance with the route via the other service the lower preference.

Method of routing a short message and an apparatus for routing a short message

A radio resource connection in a successfully authenticated transaction is retained and utilized for other deliveries without requiring performance of paging or security related functions (such as authentication, assignment and ciphering). Responsive to a successfully authenticated transaction, a message is generated indicating that an addressee mobile station is available for attempted redelivery of a stored short message service message. In one implementation, the message is then retrieved and delivered to the mobile station over the retained radio resource connection. In another implementation, all other transactions are provided to the addressee mobile station over the retained radio resource connection, with the retrieved short message service message being subsequently delivered over the retained radio resource connection in a parallel transaction.

Retention of radio resource connection for short message service message delivery in a cellular telephone network

The address of a latest Serving GPRS Support Node (SGSN) is provided to a Gateway GPRS Support Node (GGSN) by a special Update SGSN Address Request message which is sent from the SGSN to the GGSN. For a subscriber whose subscription permits, the address of the latest SGSN node is sent in the Update SGSN Address Request message for a qualified packet data protocol (PDP) context. A qualified PDP context (1) has a static PDP address; and (2) is not activated. The Update SGSN Address Request message can be sent from the SGSN to the GGSN in either a GPRS Attach scenario or an Inter-SGSN Routing Area Update Scenario. In response to the Update SGSN Address Request message, the GGSN sends an Update SGSN Address Response message which advises whether the updating of the address for the SGSN at the GGSN has been successful.

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Stockholm, Sweden

Thierry Josse