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Method for processing voice service continuity switching failure

A voice service and handover failure technology, applied in the field of communication, can solve the problem that UE cannot return to the access channel, etc.

Active Publication Date: 2011-07-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0049] However, the following problems exist in the prior art when the above-mentioned handover failure is handled: In step A213, after receiving the handover cancel message sent by E-UTRAN, the enhanced MSC will notify the SCC AS to release the CS session Leg established in step A208, and the SCC After the AS receives the message of releasing the CS session leg, it will release the corresponding remote session leg together.
Therefore, if the SIP session invitation message in step A214 reaches the SCC AS later than the CS session leg release message sent by the enhanced MSC, when the SIP session invitation message in step A214 arrives, the SCC AS may have released the corresponding remote session leg, and the UE will not be able to return to the original access channel

Method used

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  • Method for processing voice service continuity switching failure
  • Method for processing voice service continuity switching failure
  • Method for processing voice service continuity switching failure

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0090] image 3 For the first embodiment of the present invention based on figure 2 The flow chart of the processing method when voice service continuity switching (switching from LTE / SAE network access to CS domain access) fails in the shown SRVCC architecture.

[0091] The core idea of ​​this embodiment is: after the enhanced MSC receives the handover cancellation message, it is judged whether the handover cancellation message carries the original access channel identifier, and if the identifier is carried, only the handover target MSC is notified (i.e. figure 2 The shown MSC, or the MSC combined with the enhanced MSC) releases the established resources without sending the message for releasing the CS session Leg; or delays sending the message for releasing the CS session Leg. Such as image 3 As shown, the method includes the following steps:

[0092] 301. After receiving the measurement request sent by the LTE / SAE wireless network element E-UTRAN, the UE sends a measu...

no. 2 example

[0121] Figure 4 For the second embodiment of the present invention based on figure 2 The flow chart of the processing method when voice service continuity switching (switching from LTE / SAE network access to CS domain access) fails in the shown SRVCC architecture.

[0122] The core idea of ​​this embodiment is: after the MME receives the handover cancel message, it judges whether the message carries the original access channel identifier, and if it carries the identifier, delays or does not send the handover cancel message to the enhanced MSC. Such as Figure 4 As shown, the method includes the following steps:

[0123] 401-413, same as steps 301-313;

[0124] 414. The MME receives a handover cancel message sent by the E-UTRAN;

[0125] 415. The MME judges whether the handover cancel message carries the identifier of the original access channel, and if it carries it (indicating that the UE actively cancels the handover), delay sending or not send the handover cancel message...

no. 3 example

[0131] Figure 5 For the third embodiment of the present invention based on figure 2 The flow chart of the processing method when voice service continuity switching (switching from LTE / SAE network access to CS domain access) fails in the shown SRVCC architecture.

[0132] The core idea of ​​this embodiment is: when the SCC AS receives the message of establishing CS session Leg or releasing the message of CS session Leg sent by enhanced MSC, it sets a timer T1, and does not release the remote session Leg and CS session Leg before T1 times out. Source session leg. Such as Figure 5 As shown, the method includes the following steps:

[0133] 501-508, same as steps 301-308;

[0134] 509. The SCC AS updates the remote session Leg so that it is connected to the CS session Leg, and sets timers T and T1;

[0135] The timer T is used to release the source session Leg if no handover completion message is received before timeout.

[0136] The function of timer T1 is discussed in t...

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Abstract

The invention provides a method for processing voice service continuity switching failure. The method comprises the following steps that: when UE performs a voice service continuity switch and fails to switch a session from LTE / SAE network access to CS domain access, the UE sends a notification message for canceling the switch to an E-UTRAN; the E-UTRAN sends a switch-canceling message to an enhanced MSC through an MME; and the enhanced MSC sends a message for releasing bearing resources of a session between the enhanced MSC and an SCC AS to the SCC AS, wherein the UE delays sending the notification message for canceling the switch after switching failure, or the E-UTRAN delays preset time span before sending the switch-canceling message, or the MME delays the preset time span before sending the switch-canceling message, or the enhanced MSC delays the preset time span before sending the message for releasing the bearing resources of the session.

Description

technical field [0001] The invention relates to the communication field, in particular to a processing method when voice service continuity switching fails. Background technique [0002] In order to ensure the continuity of voice services between the Circuit Switched (CS) domain and the IP (Internet Protocol, IP) Multimedia Subsystem (IP Multimedia Core Network Subsystem, IMS) domain, traditional voice services Continuity (Voice Call Continuity, referred to as VCC) solutions such as figure 1 shown. [0003] Among them, after the dual-mode user equipment (User Equipment, referred to as UE) is successfully registered in both the CS domain and the IMS network, when the UE initiates a voice service in the CS domain or the IMS network, it is anchored to the centralized control service and session service of the IMS network. In the continuity application server (Service Centralization and Continuity Application Server, SCC AS for short), at this time, the UE has two identifiers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/14H04W76/02H04W76/06H04W68/00
Inventor 游世林蔡继燕郝振武李振东余志铭谢振华
Owner ZTE CORP