摘要:
A User Equipment (UE) and IP Multimedia Subsystem (IMS) network node for indicating the IMS services and IMS applications to which a Session Initiation Protocol (SIP) message relates. An IMS communication service identifier and an IMS application reference are added to the SIP message. The identifier and the reference may be added as Feature Tags. The reference may also be added as an a-line augmenting an m-line in a Session Description Protocol (SDP) part of the SIP message.
摘要:
A method and apparatus for providing location information for subscribers connected to a packet-switched mobile access network in connection with emergency calls made over a multimedia service network. An emergency request is received at the multimedia service network from a subscriber containing the calling number of the subscriber. In response thereto, a media gateway control function in the multimedia service network sends a location query including the calling number to a mobile positioning center in the mobile access network, which then can retrieve location information for the subscriber. After receiving location information from the mobile positioning center, the media gateway control function selects an emergency center and sends a location indication for the subscriber thereto in a circuit-switched control message for initiating an emergency call, according to prevailing standards.
摘要:
A method of reserving credit for a mobile subscriber in respect of an IP multimedia service. The method comprises, following initial registration of the subscriber to the IP Multimedia service but prior to invocation of an IP Multimedia service, using the early session establishment procedure to reserve a credit amount at a charging control node and to notify an IP Multimedia Serving Element of the credit reservation, whereupon, at invocation of said IP multimedia service, the IP Multimedia Serving Element is able to proceed immediately with the session establishment.
摘要:
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.
摘要:
The invention relates to method of executing a service in a Media Gateway Control Function (12) for establishing a call between a calling party's terminal (8) served by a Mobile Switching Centre (2), and an IP Multimedia Subsystem Service (20). The Media Gateway Control Function (12) is arranged to query a Service Control Point (10) on which an overlay process is loaded. The correct SCP (10) is identified by the MGCF (12) using a correlation identifier originally published by the SCP itself after having received an IN service trigger from an MSC or GMSC. The MGCF will receive call related data from the SCP, such as the original dialled number. This data is used by the MGCF to populate information elements in a SIP Invite message. The invention gives a solution for providing GSM specific information, e.g. dialled number, location information, to an IMS service. This information may not be available to the IMS service through present methods.
摘要:
A method and apparatus for providing location information for subscribers connected to a packet-switched mobile access network in connection with emergency calls made over a multimedia service network. An emergency request is received at the multimedia service network from a subscriber (A) containing the calling number of the subscriber. In response thereto, a media gateway control function in the multimedia service network sends a location query including said calling number to a mobile positioning centre in the mobile access network, which then can retrieve location information for the subscriber. After receiving location information from the mobile positioning centre, the media gateway control function selects an emergency centre and sends a location indication for the subscriber thereto in a circuit-switched control message for initiating an emergency call, according to prevailing standards.
摘要:
There is a need in the art for application servers to be able to exhibit the same behavior irrespective of the used access technology. In order to address this need the present invention provides methods and apparatuses for allowing one or more subscribers to be administratively registered.
摘要:
An enhanced Voice Call Continuity (VCC) application server and a method are described herein that: (1) assists in establishing an emergency call between a VCC capable User Equipment (UE) (which is located within an IMS network) and a Public Safety Access Point (PSAP); (2) assists in transitioning the emergency call from an IMS domain to a CS domain so the emergency call can be continued when the UE roams from the IMS network to a Circuit Switched (CS) network; and (3) assists the PSAP to call back the UE if the emergency call is dropped while the US is located in the CS network.