摘要:
A method and apparatus for establishing a communication session in an IMS Centralized Services communication network. A Service Centralization and Continuity Application Server (SCC AS) receives a request from an originating device to establish a session with a target device. The request includes a plurality of codec identifiers that could be used by the originating device. The SCC AS sends a second request to establish the session to the target device. The SCC AS subsequently receives, from an intermediate node between the SCC AS and the target device, an invite message. The invite message includes an indication that a codec identifier has been selected from the plurality of codec identifiers. The SCC AS then sends a message to the intermediate node instructing the intermediate node to establish the session.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
The invention relates to a method of notifying an Application Function, AF, in a communications network of resource restrictions relating to a communications 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.