Telefonaktiebolaget Lm Ericsson (publ)

Bernt Karlsson

Rolf Hansson

Rolf Elis Gustaf Hansson

Niklas Gustafsson

The present invention is a method and system for updating location information of mobile stations. A mobile station moves from an area controlled by a first mobile services switching center (MSC) to an area controlled by a second MSC. The mobile station then registers with the second MSC, and, in response, the mobile station is added to a second MSC database. The second MSC recalculates a second MSC checksum to include the newly registered mobile station. Next, the HLR sends an HLR checksum to the second MSC. The second MSC compares the HLR checksum and the second MSC checksum. If the checksums are equal, then the second MSC sends the location registration signal to the mobile station. If the checksums are unequal, then the second MSC sends an error signal to the HLR, and also sets the second MSC database equal to a previous correct database. Next, the HLR sends all logged erasures to the second MSC. The second MSC then appropriately subtracts and adds each erased and newly registered mobile station to the database of the second MSC and recalculates the second MSC checksum until both checksums are equal.

Subscribers database proofing using a checksum in a telecommunications system

A telecommunications system and method is disclosed for managing congestion in the Home Location Register (HLR). At regular intervals or in response to a registration message associated with a Mobile Station (MS) registration request, the HLR can transmit the current load conditions in the HLR to one or more Mobile Switching Centers (MSC's) within the area served by the HLR. In response, the MSC's can use this load information to reduce the registration intensity in order to protect the HLR from congestion. Each MSC can include one or more HLR load thresholds, and if the current load level in the HLR is above one of these thresholds, the MSC can reduce the number of registration messages sent to the HLR by a certain amount.

System and method for providing protection from an overload condition within the home location register

A method and system for the routing and transmission of data to a mobile station. Upon receiving a request to deliver data addressed to the mobile station, a node in a circuit-switched network of a mobile telecommunications system identifies whether the mobile station is capable of receiving data via a packet data bearer. If so, the node further determines whether the data addressed to the mobile station should be sent via a packet data bearer in a packet-switched network instead of sending the data via a circuit-switched bearer. If it is determined that the data should be sent via a packet data bearer, then the data is transmitted to the mobile station using a selected packet data bearer. Alternatively, if the request to deliver data addressed to the mobile station is received by a node in the packet-switched network, that node determines whether the data should be sent via a circuit-switched bearer in the circuit-switched network. If so, then the data is rerouted and transmitted to the mobile station using a circuit-switched bearer.

Bearer selection in a mobile communication system having both circuit-switched and packet-switched bearers

A method is disclosed for increasing signaling link capacity between nodes in a digital cellular communications system, wherein the signaling message to be conveyed over the link is compressed. The compressed message received at the other side of the link is then decompressed. As a consequence, the capacity of the signaling links between nodes can be increased up to 100%, and mobile station registration restrictions can be reduced. The method is disclosed for compressing MTP messages, but it can also be used for compressing other signaling messages to improve link capacity.

Growing community of inventors

Sollentuna, Sweden

Bernt Karlsson