| Patent application number | Description | Published |
|---|
| 20080212569 | Method and Apparatus for Allocating Application Servers in an Ims - A method, application server, and Serving Call/Session Control Function (S-CSCF) for allocating a SIP Application Server to a subscriber in an IP Multimedia Subsystem. A Home Subscriber Server (HSS) identifies for the subscriber, a set of provisioned initial filter criteria, which contains at least one generic SIP Application Server identity. The HSS sends the filter criteria to an S-CSCF allocated to the subscriber. The S-CSCF resolves the generic SIP Application Server identity into a plurality of application server addresses, with one of the addresses being allocated to the subscriber for use in provisioning a service to the subscriber. The S-CSCF caches the address allocated to the subscriber for subsequent use. | 09-04-2008 |
| 20080215736 | Method and Apparatus for Allocating a Server in an Ims Network - A method, apparatus, and application server for dynamically allocating an application server within an IP Multimedia Subsystem (IMS). A Serving Call/Session Control Function (S-CSCF) receives a user request and queries a central database to determine whether the user is allocated to an application server. If so, the S-CSCF forwards the request to the allocated application server. If the user is not already allocated to a server, the S-CSCF allocates the user to an application server and forwards the request to the newly allocated application server. The S-CSCF or the newly allocated application server sends a request to the central database to record the allocation. | 09-04-2008 |
| 20080232352 | Method and Apparatus for Distributing Application Server Addresses in an Ims - A method of distributing application server addresses in an IP Multimedia Subsystem. Upon allocation of an application server to a subscriber, the allocated or another application server sends at least one application server address to a Home Subscriber Server (HSS). The HSS stores the address(es) in association with the subscriber identity and sends the address(es) to a Serving Call/Session State Control Function (S-CSCF) allocated to the subscriber. The S-CSCF caches the address(es) in association with the subscriber identity and uses the address(es) to send subscriber-related messages to the allocated application server. | 09-25-2008 |
| 20080235322 | Media Sharing - A method and device for distributing media from a network based content server to two or more clients participating in a burst-based service session. The method includes, following establishment of the burst-based service session, joining the content server to the session as a further participating client, sending a media grant to the content server, and delivering the requested media from the content server to the other participating clients. | 09-25-2008 |
| 20080256177 | Method and Apparatus for Maintaining Information at an Ims Client - A method, IP Multimedia Subsystem (IMS) client terminal, and Session Initiation Protocol (SIP) application server for synchronizing data stored at the IMS client terminal with data stored at the SIP application server. When the IMS client terminal sends a request to the SIP application server, the server determines whether the request includes information identifying the current state of the data stored at the client. If so, the server determines whether to send further data to the client based upon the information included in the request. | 10-16-2008 |
| 20080319948 | Xml Document Manager Server Method and Apparatus - A method is disclosed of providing an XML Document Manager Server function to an XML Document Manager Client ( | 12-25-2008 |
| 20080320083 | Methods and Apparatus for Push to Talk Type Service - A method and apparatus for processing a floor request in a push to talk type service in which a floor is required for a first terminal to distribute media to a second terminal. The first terminal sends a floor request message to a PoC Server. The message relates to at least two different types of media content and indicates how and to what extent the granting or denial of the different media types interrelate. The message may indicate, for example, that if a first media type is denied, the others should be denied; or that the granting or denial of the first media type should not affect the other media types. The message may also indicate other conditions and relationships. The PoC Server processes the request based on the indicated interrelationships and/or conditions, and grants or denies each media type. | 12-25-2008 |
| 20090089435 | Method for initiating IMS based communications - A method of initiating an IP Multimedia Sub-system communication for a user that is not registered a priori with the IP Multimedia Subsystem. The method comprises receiving a communication request from said user at a Session Initiation Protocol Application Server via an interface to an external network or receiving an internally or externally generated stimulus requiring the establishment of an IP Multimedia Subsystem communication, allocating a Serving Call/State Control Function to the user, forwarding a SIP request from the Application Server to the allocated Serving Call/State Control Function, and establishing the requested communication. | 04-02-2009 |
| 20090097398 | FAILURE RECOVERY IN AN IP MULTIMEDIA SUBSYSTEM NETWORK - A method and apparatus for facilitating recovery from the failure of a Serving Call Session Control Function (S-CSCF) within an IP Multimedia Subsystem (IMS) network. A Proxy Call Session Control Function (P-CSCF) receives a SIP request sent by a User Equipment (UE) having an identity previously registered with the IMS network and for which a given S-CSCF was allocated. The P-CSCF determines whether the given S-CSCF has failed or is otherwise unreachable. If so, the P-CSCF sends a re-registration message to the UE. Receipt of the re-registration message at the UE forces the UE to perform an IMS registration procedure with the IMS network. | 04-16-2009 |
| 20090215454 | Method and Apparatus for use in a Communications Network - A method and apparatus for registering a mobile node such as a User Equipment (UE) of a UMTS telecommunications network with a subsystem of the network such as an IP Multimedia Subsystem (IMS). A Policy and Charging Rules Function (PCRF) node provides policy and charging rules, and a Gateway GPRS Support Node (GGSN) enforces the rules for traffic flows. The UE sends a registration request to the GGSN, which selects a PCRF. When a Proxy Call Session Control Function (P-CSCF) receives the registration request, the P-CSCF selects a candidate PCRF and validates the selection. If the candidate PCRF is the PCRF selected by the GGSN, the registration is successful. If not, the P-CSCF may select another PCRF and repeat the validation process. | 08-27-2009 |
| 20090268723 | Methods and Apparatuses for Transporting Signalling Connectivity Status Information Relating to the Signalling Connection Between a Terminal and P-CSCF in IMS - A system, method, and Proxy Call/Session Control Function (P-CSCF) for transporting signaling connectivity status information relating to a signaling connection between a terminal and the P-CSCF in an IP Multimedia Subsystem (IMS) network. In one embodiment, when the P-CSCF detects that the connectivity status has changed, the P-CSCF sends a SIP request such as a REGISTER request to a Serving CSCF (S-CSCF) indicating the new status. Alternatively, the registration event package of the terminal may be extended to include the connectivity status, and the P-CSCF then sends the status in a PUBLISH request. In an alternative embodiment, the P-CSCF maintains a new SIP event package. The S-CSCF subscribes to the SIP event package and the P-CSCF notifies the S-CSCF upon a change of connectivity status. | 10-29-2009 |
| 20090303943 | Access Control in a Communication Network - A method of controlling access to services of an IP Multimedia Subsystem (IMS) by a user based upon the user's location. In response to a user requesting access to a service, information identifying the user's location is provided to the IMS. Within the IMS, the provided information is compared with authorization information stored in a database. The authorization information includes information identifying prohibited and/or allowed access locations. Dependent upon the result of the comparison, access to the IMS services is allowed or denied. | 12-10-2009 |
| 20100008352 | Methods and Apparatus for Registering or Deregistering a User to or From an IP Multimedia Subsystem - A method of registering or deregistering a user to or from an IP Multimedia Subsystem (IMS) network. A SIP Application Server (SIP-AS) performs a registration or deregistration with the IMS network on a user's behalf. The registration or deregistration is performed over one of the following interfaces: a Service Control Interface (ISC) with a Serving Call State Control Function (S-CSCF), a Gm interface with a Proxy CSCF (P-CSCF), or an Ma interface with an Interrogating CSCF (I-CSCF). | 01-14-2010 |
| 20100088421 | Evaluating Initial Filter Criteria - A method of evaluating Initial Filter Criteria (IFC) at a terminating Serving Call Session Control Function (S-CSCF) in an IP Multimedia Subsystem network. Upon receiving a Session Initiation Protocol (SIP) message containing a destination Uniform Resource Identifier (URI), the S-CSCF applies an Initial Filter Criterion to the message, sends the message to an Application Server (AS), and suspends further IFC evaluation. When a return message is received from the AS, the S-CSCF determines whether the AS changed the URI. If so, the S-CSCF makes a determination of whether to resume IFC evaluation. If the AS did not change the URI, the S-CSCF resumes IFC evaluation. | 04-08-2010 |
| 20100217855 | METHODS AND APPARATUSES FOR NOTIFYING AN APPLICATION FUNCTION OF RESOURCE RESTRICTIONS RELATING TO A COMMUNICATION SESSION - The invention relates to a method of notifying an Application Function (AF) in a communications network of resource restrictions relating to a communication session. The network includes a Policy and Charging Rules Function (PCRF) for authorising and controlling flows of data in the session. In the method the AF sends an authorisation request to the PCRF for establishing the communication session. The authorisation request includes an indication that the AF is to be notified of resource restrictions for the data flows in the session. The PCRF notifies the AF of the resource restrictions. | 08-26-2010 |
| 20100217858 | Handling User Identities In The IP Multimedia Subsystem - A method of handling SIP requests received by an IP Multimedia Subsystem network. The method comprises determining whether or not the SIP destination identity is within a range of identities owned by an operator of the network but is currently unallocated to a subscriber or service of the network and, if yes, routing the message to one or more SIP application servers within the network and implementing service logic at the application server(s) specific to a network owned but unallocated SIP identity. | 08-26-2010 |
| 20100223348 | Establishing a Multimedia Communications Session - The invention relates to a method of enabling use equipment to establish a communication session over an IMS network. The communication session is enabled by one or more call/session control functions in the network in accordance with media characteristics that define the network resources to be utilised for the session. The method comprises: receiving with the IMS network a subscriber registration request originating from the user equipment and, in response thereto, sending to the user equipment an identification of allowable media characteristics. | 09-02-2010 |
| 20100232402 | Handling Multiple User Interfaces in an IP Multimedia Subsystem - A method of operating an Internet Protocol Multimedia Subsystem (IMS) network having a plurality of user interfaces. A terminal agent is interposed between a plurality of Session Initiation Protocol (SIP) User Agents and a Serving Call/Session Control Function (S-CSCF) of the IMS network. The terminal agent registers its contact address with the S-CSCF on behalf of the plurality of SIP User Agents and emulates a single SIP User Agent to the S-CSCF. | 09-16-2010 |
| 20100287285 | CONTROL OF QUALITY-OF-SERVICE PRECONDITIONS IN AN IP MUTIMEDIA SUBSYSTEM - The invention relates to a method of establishing a session between client user terminals accessing IP Multimedia Subsystem, IMS, networks. At least one of the IMS networks implements the use of Quality of Service, QoS, preconditions, and at least one of the client user terminals does not use QoS preconditions. The method includes receiving, at an inter-working function, IWF located in one of the IMS networks, an IMS session initiation request originated by an originating client, the request indicating a terminating client for the session. A decision is made, based on the session initiation request, that one of the originating client and the terminating client is not using QoS preconditions. A set of QoS preconditions is inserted into a procedure for establishing the IMS session on behalf of the client that is not using QoS preconditions. Session establishment is completed only after QoS resources complying with the set of QoS preconditions have been established. | 11-11-2010 |
| 20100293261 | METHODS, APPARATUSES AND COMPUTER PROGRAM FOR IMS RECOVERY UPON RESTART OF A S-CSCF - The present invention is aimed to provide means and methods for recovery of the IMS where an S-CSCF has suffered a restart after a failure, software upgrade or other reasons. To this end, the present invention provides for a first method to be applied in a HSS holding subscriber data for subscribers of the IMS and a second method to be applied in a S-CSCF selected for serving a given subscriber, upon restart of a S-CSCF assigned for serving a given subscriber. Both first and second methods cooperating to submit from the S-CSCF towards the HSS contact data required by the S-CSCF to contact the given subscriber, or to contact a proxy server where the subscriber is accessible through; storing the contact data at the HSS; and providing from the HSS towards an IMS entity, which may be the previously assigned S-CSCF or a new S-CSCF, contact information elements selectable from the contact data. | 11-18-2010 |
| 20100306397 | STORAGE OF NETWORK DATA - A generic method is described for storing data in the HSS ( | 12-02-2010 |
| 20100316045 | Prioritising Messages in a Communications Network - A method and communications network node for allocating a priority level to an Internet Protocol (IP) packet containing all or part of a Session Initiation Protocol (SIP) message. One or more characteristics of the SIP message are determined, and the characteristics are mapped to a Differentiated Services Code Point (DSCP) value. The DSCP value is then applied to the IP packet header. | 12-16-2010 |
| 20110022722 | POLICY AND CHARGING CONTROL ARCHITECTURE - Apparatus for generating policy and charging rules to control IP flows across a packet switched network. The apparatus comprises a first interface for coupling to an application function and a second interface for coupling to a policy and charging enforcement function implemented at a node through which said IP flows pass. A processor or processors is/are configured to receive service information at said first interface, and, via said second interface to trigger the removal of one or more pre-existing policy and charging rules at the policy and charging enforcement function following a predefined delay. | 01-27-2011 |
| 20110128843 | FAILURE RECOVERY IN AN IP MULTIMEDIA SUBSYSTEM NETWORK - A method is provided for facilitating recovery from the failure of a P-CSCF within an IP multimedia Subsystem network. A gateway, such as a GGSN, monitors signals arriving at the gateway from the P-CSCF and provides an indication if the monitored signals become unacceptable, for example because of an interruption in the signals. The gateway responds by signalling the unavailability of the P-CSCF to user equipment, which was associated with the P-CSCF during a previous registration with the IMS network. In response, for example, the user equipment affected by the failure may request re-registration with the IMS network using a different available P-CSCF. | 06-02-2011 |
