Ericsson Gmbh

Telefonaktiebolaget Lm Ericsson (Publ)

Krister Sallberg

Mahesh V Patel

Martin Reichelt

A telecommunications system and method is disclosed for providing mobility management for a Mobile Station (MS) to allow the MS to receive Internet telephone calls when the MS is in idle mode. This can be accomplished by using a voice gateway to transform an incoming Internet phone call to a normal cellular voice call. In addition, by introducing a new Intelligent Network (IN) application, which handles location updates for the MS with a central Internet telephony server, an MS in idle mode can receive incoming Internet telephony calls. The IN application can obtain a temporary Internet Protocol (IP) address for the MS from a Direct Access Unit (DAU) connected to the voice gateway associated with the serving Mobile Switching Center (MSC) and register this temporary IP address with the central Internet server, which uses this temporary IP address to forward incoming Internet telephony calls to the Voice Gateway.

System and method for mobility management for an internet telephone call to a mobile terminal

A telecommunications system and method is disclosed for providing interoperability between a cellular system's direct access to the Internet and the telephony service provided by the Public Switched Telephone Network (PSTN), in order to allow a mobile subscriber to receive calls from the PSTN while engaged in data communication, for example, over the Internet. When a Mobile Station (MS) has an active connection to a server or router running Internet Protocol, an incoming PSTN call can be forwarded to a voice gateway within the serving Mobile Switching Center/Visitor Location Register (MSC/VLR), which transforms the call to an Internet phone call. During the direct access connection to the Internet, the MS can signal specific information, using, e.g., a prefix, to activate the call forwarding to voice gateway feature.

System and method for connecting a call to a mobile subscriber connected to the Internet

A system and method in a communications network for minimizing the number of attempts required to establish a communication between two nodes is disclosed. Each node maintains a database table composed of addresses of other nodes within the communications system. Associated with each nodal entry is a list of dialogue types that have been initiated with or terminated from the relevant node. Associated with each dialogue type entry is the most-advanced protocol version, such as the Mobile Application Part (MAP), that has been negotiated with the affiliated node for that dialogue type. When a first node wishes to initiate a dialogue with a second node, the first node checks the database table. The first node locates the second node in the table by address, locates the appropriate dialogue by type, and then determines the appropriate MAP version. If either the node or the specifically desired dialogue type is not within the database table, the first node attempts to establish the dialogue with the highest MAP version that the first node supports. After any resulting fall-back procedure has occurred, the first node stores in the database table the highest MAP version that was negotiated. The database table is periodically refreshed by clearing one or more entries.

System and method for facilitating inter-nodal protocol agreement in a telecommunications

A system and method for reducing or eliminating the transference of mobile terminal mobility management information caused by temporary signal interferences blocking communications is disclosed. When the distance of a mobile terminal from a base station servicing a first network system exceeds a threshold value, the mobile terminal's distances from other base stations (servicing other network systems) are determined and the shortest distance, corresponding to a second network system, is selected and control transferred. The mobility management information for the mobile terminal, however, resident within the first network system, remains within the first network system after the control transference, the information being accessible by the second network system via a packet switch interconnecting the first and second network systems.

System and method for reduced network information handovers

A wireless communications system, such as a GSM/PCS 1900 wireless communications system, is connected to a digital network, such as the integrated services digital network (ISDN) through one or more trunks. The trunks have one or more information transfer capabilities, such as unrestricted 64 kbps data transfer rate typical in European markets or restricted data transfer rates of less than 64 kbps which can be found in North American markets. Terminal equipment, such as mobile stations, in the wireless communications system requests either restricted digital information (RDI) services or unrestricted digital information services (UDI). An interworking function unit (IWF) in a Mobile service center (MSSC) of the wireless communications system determines the transfer capability of the one or more available trunks, and maps signaling messages between the wireless communication system and the digital network in response to the transfer capability of the one or more available trunks and in response to whether an RDI or a UDI service is requested by the terminal equipment.

System and method for interworking of wireless communication systems

A method and an arrangement for link allocation which provide selecting a free link for a requested connection from a plurality of available route coordinated links according to a particular resource requirement of the requested connection and depending on the current resource seizure of connections that have already been established on utilized links. The establishment of a requested connection and the connections already established have the same or different resource requirement. The current resource seizure for each link resulting from the established connection or connections is stored in a memory. Each link is sorted in the memory in a link allocated memory site which corresponds to the current resource seizure of the link concerned, or the free resource capacity of the link. When a requested connection with a specific resource requirement occurs, it is first evaluated whether or not a link sorted in a selected memory site has residual free capacity for the requirement in question, the memory site being dependent on the specific resource requirement of the connection. When such is the case, establishment of the requested connection is accepted, either via the link or via another suitable link.

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Lund, Sweden

Krister Sallberg