Patent application number | Description | Published |
20110164613 | Media negotiation method for IP multimedia link - A media negotiation method for an IP multimedia link is used in the process of establishing an IP multimedia link between a first entity and a second entity via an application server (AS) of an IP multimedia subsystem (IMS). AS sends the second entity an invite message, which includes media resource information of the first entity; When AS receives a message with media resource information from the second entity before an answer message is received or after it receives a response message with media resource information from the second entity, AS sends an IMS re-invite message without media source information to the first entity; the AS, after receiving the IMS signaling message with media resource information from the first entity, sends the first entity the media resource information returned by the second entity. The present invention is applicable to an IMS centralized service and may effectively reduce the number of steps and the time required after response for media resource re-negotiation. | 07-07-2011 |
20110243149 | PATH NODE DETERMINING METHOD, MEDIA PATH ESTABLISHING METHOD, AND SIGNALING MEDIA GATEWAY - The present invention provides a path node determining method, a media path establishing method and a signaling media gateway. The path node determining method comprises: for any one of the signaling media gateways in the IMS network, when receiving a first SDP offer, transmitting a first SDP offer carrying a first path parameter, wherein a network segment identifier of the signaling media gateway is added in the first path parameter of the transmitted first SDP offer; when receiving a first SDP answer for the transmitted first SDP offer, the signaling media gateway judging, according to a second path parameter in the received first SDP answer or the first path parameter in the transmitted first SDP offer, whether the signaling media gateway is a path node; and transmitting the first SDP answer which carries or does not carry the second path parameter. Through the technical solutions of the present invention, it is possible to effectively reduce the number of the nodes of a media path and save the resources of media processing equipment. | 10-06-2011 |
20120057569 | Method for realizing single radio voice call continuity and single radio voice call continuity system - A method for realizing a single radio voice call continuity and a single radio voice call continuity system are disclosed. After a UE- | 03-08-2012 |
20120198068 | IMS media codec negotiation method and system - The present disclosure provides an IMS media codec negotiation method, which is used in an IMS network. The method comprises: when forwarding a media resource request, a first signaling media network element carries a media address of a second media gateway and a codec supported by the second media gateway into the media resource request, wherein the second media gateway is controlled by the first signaling media network element and is used for code transition; when receiving a media resource response, the first signaling media network element takes the second media gateway as a node of a media path in the case that the media resource response information related to the second media gateway. An IMS media codec negotiation system is also provided by the present disclosure. The method and system mentioned in the present disclosure can realize media codec negotiation via interaction of the media resource request and response for only one time, therefore, the signaling overhead is reduced, and the user experience is improved. | 08-02-2012 |
20120207127 | Method and system for realizing single radio voice call continuity - The disclosure discloses a method for realizing single radio voice call continuity, which is applied in an IP Multimedia Core Network Subsystem (IMS) network. The method includes: receiving, by a service continuity application server (SC AS), a handover request, and then updating, by the SC AS, a remote leg, and transmitting, by the SC AS, a handover notification message to a user terminal; receiving, by the user terminal, a handover command in a Packet Switch (PS) domain and the handover notification message, then adjusting, by the user terminal, an access mode to be accessing a Circuit Switch (CS) domain. The invention further discloses a system for realizing single radio voice call continuity. The method and system for realizing enhancement of single radio voice call continuity provided by the disclosure can effectively reduce the overlong interruption time in the prior art, and greatly improve the user experience. | 08-16-2012 |
20120213202 | Switching System and Method of Ringing Session with CRBT - A method for handing over an alerting phase session with customized alerting tone is disclosed. The method includes: when the handover occurs in an alerting phase session with a customized alerting tone in the way of early session, a mobile switching center initiating a handover of a normal media negotiation dialog and the MSC or customized alerting tones application server initiating a handover of customized alerting tone session. A system for handing over an alerting phase session with customized alerting tone is also disclosed, and the system includes a mobile switching center and a customized alerting tones application server. In the present method and system, even the handover from PS network to CS network occurs, the service experience of the calling user on the customized alerting tone session will not change, thus the normal call request is not affected and there is no need to modify the exiting IMS architecture. | 08-23-2012 |
20120269117 | METHOD AND SYSTEM FOR IMPLEMENTING DOMAIN SELECTION DURING THE TERMINATED CALL - The present invention discloses a method and a system for implementing domain selection during a terminated call, wherein, the method comprises: an application server (AS) sending, according to a received call request message, a query request message to a home subscriber server (HSS); the HSS querying, according to the query request message, a packet switching (PS) domain mobility management network element to obtain information of a called terminal and/or a network accessed by the called terminal in the call request message; the HSS feeding back the obtained information of the called terminal and/or the network accessed by the called terminal to the AS; and the AS selecting a domain to which a call message is to be routed according to the information of the called terminal and/or the network accessed by the called terminal. The present invention can greatly reduce the number of the signalings between the PS domain mobility management element and the HSS, avoids various limitations of the signaling loads generated by the HSS on network deployment, is convenient for the network deployment, and ensures the implementation of services. | 10-25-2012 |
20120303825 | METHOD AND DEVICE CONFIGURED FOR PROCESSING AN SDP REQUEST IN A MEDIA PATH OPTIMIZATION PROCESS - The present invention provides a method and device configured for processing an SDP request in a media path optimization process. In this case, the method comprises: an application layer gateway (ALG) receiving a session description protocol (SDP) request; the ALG determining that media connection information used by the SDP request is different from media connection information in last accessible domain information in node information of the SDP request; and the ALG sequentially adding its forward accessible domain information and its backward accessible domain information to an end of a queue of the node information of the SDP request, and then sending the SDP request. By virtue of the present invention, an optimized media path and normal communication can be ensured. | 11-29-2012 |
20130039267 | Method and System for Implementing Single Radio Voice Call Continuity - The present invention discloses a method and a system for implementing single radio voice call continuity (SRVCC), and said method includes: an ALG sending number information and/or identifier information if the ALG to a SCAS via a signaling message; said SCAS judging whether the number information and/or identifier information of the ALG are identical with the last used REFER number information or not, and if not, said SCAS notifying a PS or CS network control entity of the number information and/or identifier information of the ALG; alternatively, said SCAS notifying the PS or CS network control entity of the number and/or identifier information of the ALG. The present invention implements to dynamically select the ALG as a REFER operation entity to implement SRVCC, and solves the problem that a REFER request cannot be sent to an appropriate ALG since this ALG cannot be dynamically determined. | 02-14-2013 |
20130188606 | Method and system for switching circuit switch domain service to packet switch domain - The disclosure discloses a method for switching a circuit switch domain service to a packet switch domain, configuring an HO-Proxy for handover to a PS domain of a target network, the method includes that: a service network base station system sends a CS domain service handover request for a UE to the HO-Proxy when the service network base station system determines to switch a CS domain service of the UE to the PS domain of the target network; and the HO-Proxy requests a target network control entity to switch the CS domain service of the UE to the PS domain of the target network, or switches the CS domain service of the UE to the PS domain of the target network. The disclosure further discloses a system for implementing the method. In the disclosure, when used for switching a CS domain service to a PS network, the HO-Proxy can preserve accurately the PS bearer resource for a corresponding (CS or PS domain) service of the UE, thereby implementing accurate and timely handover. | 07-25-2013 |
20130250909 | Method and System for Implementing Reverse Single Radio Voice Call Continuity - A method and system for implementing reverse Single Radio Voice Call Continuity (rSRVCC) are provided in the present invention. The method includes: after receiving a handover request from a Circuit Switch (CS) domain, a current Mobile Switch Center (MSC) sending a transfer request regarding a terminal subscriber or a session in which the terminal subscriber participates to an IP Multimedia Core Network Subsystem (IMS) Control Function Entity (ICFE); and after receiving the transfer request, the ICFE initiating a media connection establishment flow between the terminal and a far end. The technical solution of the present invention ensures rSRVCC when a terminal hands over from a CS domain to a PS domain. | 09-26-2013 |
20140362772 | Local Forwarding Method and System for User Plane Data, and Local Gateway - A local switching method for user plane data includes: after being triggered, a level 1 data node judging whether a direct tunnel can be established for a source user equipment and a target user equipment, and if so, establishing a direct tunnel between a source level 2 data node and a target level 2 data node for the source user equipment and the target user equipment; after receiving an IP data packet transmitted by the source user equipment to the target user equipment, the source level 2 data node forwarding the IP data packet to the target level 2 data node through the direct tunnel between the source level 2 data node and the target level 2 data node, so that the target level 2 data node forwards the IP data packet to the target user equipment. | 12-11-2014 |