Telefonaktiebolaget Lm Ericsson (publ)

Javier Perez Fernandez

Luis Maria Lafuente Alvarez

Cristina Ruiz Balmaseda

Jesus-Javier Arauz-Rosado

Alfonso Celaya Prieto

Javier Arauz Rosado

Francisco Parra-Moyano

Francisco Parra Moyano

Fernando Inigo Torre

A method of enabling redundancy for a Home Subscriber Service (HSS) of an IP Multimedia Subsystem (IMS) is provided. Redundancy is provided by a plurality of HSS instances. Where a client node of the IMS requires details of an HSS, the client node is provided with details of a proxy HSS representing the HSS instances. The client node uses the details to send a subsequent request directed to the proxy HSS. The proxy HSS selects an appropriate one of the HSS instances to handle the request received at the proxy HSS from the client node. The proxy HSS forwards the request to the selected HSS instance for handling.

Method and apparatus for use in a communications network

A controller (GK) of a communication system (SYS) including in each of a plurality of geographically distant zones (ZA, ZB, ZC) a zone-specific controller (GK) and one or more subscriber terminals (EP) comprises a controller characteristics memory (CCM) for storing at least a private network identifier (PNID), a private network configuration memory (PNCM) for storing the private network configuration, a private network configuration determing means (PMDM) for communicating with other controllers (GK) of the communication system to determine the private network configuration and a call router for routing a call setup message received from a subscriber terminal (EP-A) in one zone (ZA) to another subscriber terminal (EP-B) of another zone (ZB). Before setting-up a call or at repeated time intervals the private network configuration including the controllers and subscriber stations in all zones (ZA, ZB, ZC) which belong to the private network identified by the private network identifier (PNID) can be determined and this private network configuration is used for determining the location of the respective controller which serves the called subscriber station (EP-B).

Communication system, method and controller for routing calls within private networks distributed among geographically distant zones

The invention relates to a PCS-server of a personal communication system providing personal telephone numbers for PCS subscribers. A PCS subscriber can send a handling message to the PCS-server and can form a specific handling of one or more destination profiles stored in a destination profile memory. The specific handling relates to the specific selection and activation/deactivation or switching between specific destination profiles or to the setting of specific call distribution criteria in the destination profiles. The call distribution criteria relate to origin parameter teleservice-type parameters, busy option parameters and number of call parameters. The PCS subscriber can therefore flexibly configure and use the destination profiles allocated to his personal telephone number. Based on the selected call distribution criteria a flexible delivery of the calls by using the so-set destination profiles is possible.

Personal communication system

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Rivas Vaciamadrid, Spain

Javier Perez Fernandez