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Method, device and system for called access

A technology for accessing domains and networks, applied in the field of communication

Active Publication Date: 2009-12-16
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these cases, according to the prior art, the UE will inform the network that the call establishment fails, release the call, and do not make other attempts

Method used

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  • Method, device and system for called access
  • Method, device and system for called access
  • Method, device and system for called access

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0070] Embodiment 2. In this embodiment, after the network fails to establish a bearer, the user sends a bearer establishment failure indication to the network, and the network reselects to access the network. see Figure 4 , this embodiment specifically includes:

[0071] Step 401: After the current called network side fails to establish the bearer, the UE sends a notification message notifying the network of the failure to establish the bearer.

[0072] Because the UE has dual-mode (CS / PS) access capability, the network can be either CS or PS. When establishing a bearer on the CS network fails, it can try to re-establish the bearer on the PS network, and vice versa.

[0073] Step 402: After receiving the notification message, the network selects a new bearer to access the network.

[0074] When the network receives the failure indication, it selects a new bearer to access the network through T-ADS.

[0075] Step 403: instruct the UE to establish a call bearer in the new b...

Embodiment 3

[0078] Embodiment 3. In this embodiment, it is taken as an example that a user fails to establish a bearer on the CS network. The user sends an UPDATE message indicating that the CS network bearer establishment fails, Figure 5 It is a signaling flow diagram of this embodiment.

[0079] Specifically include:

[0080] Step 501: After UE B receives a call from UE A, UE B tries to establish a bearer in the CS domain after the called access domain selection (T-ADS) decision of the SCC AS, but the bearer establishment fails.

[0081] Step 501 is the same as the existing called procedure of the UE based on the Gm interface, and will not be repeated here.

[0082] Step 502: UE B sends an UPDATE message to I / S-CSCF to notify bearer failure.

[0083] A session description protocol (SDP, Session Description Protocol) parameter is used to indicate that the establishment of the CS bearer fails.

[0084] SDP specifies a method for describing the media information of a multimedia sessio...

Embodiment 4

[0099] Embodiment 4. In this embodiment, it is taken as an example that a user fails to establish a CS network bearer. The user indicates that the CS network bearer establishment fails through the 183Session Progress message, Image 6 It is a signaling flow diagram of this embodiment. Specifically include:

[0100] Step 601: After receiving a call from UE A, UE B tries to establish a bearer in the CS domain through the T-ADS of the SCC AS, but the establishment of the bearer fails.

[0101] Step 602: UE B sends a 183 Session Progress message to I / S-CSCF to notify bearer failure.

[0102]A session description protocol (SDP, Session Description Protocol) parameter is used to indicate that the establishment of the CS bearer fails. For example c=PSTN--m=audio OPSTN-.

[0103] Step 603: The I / S-CSCF forwards the 183 Session Progress message to the SCC AS.

[0104] The SCC AS may send an access network update request to the UE using the following steps 604a-6012a or 604b-608b: ...

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Abstract

The invention discloses a method, a device and a system for called access, wherein the method comprises the following steps: selecting a new loading access network when the establishment of loading is failed; and establishing the loading in the new loading access network. The method provided by the embodiment ensures that a called terminal changes an access domain of the called terminal and re-tries the access under the condition of the failed establishment of the loading, thereby providing more guarantees for the successful calling.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method, device and system for called access. Background technique [0002] The IP-based multimedia subsystem (IMS, IP Multimedia Subsystem) communication network is considered to be the core technology of the next-generation network that realizes the integration of mobile and fixed networks and supports multiple media such as voice, video, and data, and their combined services. The current IMS network uses the IMS core network subsystem (IPMultimedia Core Network Subsystem) for business control, and the packet switching network (IP-CAN) as the access network provides bearer for signaling and media transmission, thereby separating the service control network from the bearer network , providing a unified and flexible support platform for IP multimedia applications. [0003] IMS centralized service network (ICS, IP Multimedia Subsystem Centralized Serv) is a network that us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/18H04W76/02
CPCH04L29/06326H04L29/06217H04L65/1016H04L29/06523H04W88/06H04L65/1069H04W48/18H04W76/027H04L65/80H04W76/18H04L65/1095
Inventor 段小嫣龙水平金辉
Owner HUAWEI TECH CO LTD
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