Method and system for realizing radio voice call continuity (RVCC)

A technology for call continuity and voice services, applied in connection management, communication supplementary services, wireless communications, etc., can solve problems such as eNB failure to trigger, affect user experience, and voice service interruption, and achieve the effect of avoiding handover failure

Active Publication Date: 2012-08-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] There is a problem here: because the two different SRVCC procedures of the UE for different target systems correspond to two UE capabilities respectively, and there is only one "SRVCC Operation Possible" indication field delivered by the MME to the eNB, so the UE only supports one In the case of SRVCC, this field cannot indicate the SRVCC process of which target system the UE actually supports, and errors will be caused when the MME fills in the cells and the eNB makes SRVCC decisions
[0013] Question 1: How should the "SRVCC Operation Possible" field be filled in the UE Context Setup Request message or HandoverRequest message sent by the MME to the eNB? If it is filled in as "Possible", it may cause the eNB to mistakenly trigger the SRVCC process when it decides the handover between UE and CDMA200

Method used

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  • Method and system for realizing radio voice call continuity (RVCC)
  • Method and system for realizing radio voice call continuity (RVCC)
  • Method and system for realizing radio voice call continuity (RVCC)

Examples

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Embodiment 1

[0048] In this embodiment, the UE capability only supports the SRVCC capability to UTRAN / GERAN. The core network capability supports SRVCC capability to UTRAN / GERAN and CDMA2000lxRTT. The schematic diagram of the processing method for switching the target cell to UTRAN / GERAN cell is shown in Figure 4 .

[0049] The UE indicates to the MME through the "UE Network Capability" field and the "MS Network Capability" field in the NAS signaling Attach Request or Tracking Area Update Request message that its capability supports the SRVCC process to UTRAN / GERAN, but does not support the SRVCC process to CDMA2000lxRTT ;

[0050] The MME judges that the core network capabilities support both UTRAN / GERAN and CDMA2000lxRTT SRVCC capabilities. After integrating the SRVCC capabilities of the UE, only the "SRVCC Operation Possible" field corresponding to The bit position of SRVCC to UTRAN / GERAN is "TRUE".

[0051] The UE initiates a voice service in E-UTRAN. Since it reaches the coverage e...

Embodiment 2

[0053] In this embodiment, the UE capability only supports SRVCC to UTRAN / GERAN, and the core network capability supports SRVCC capability to UTRAN / GERAN and CDMA2000lxRTT. Figure 5 .

[0054] The UE indicates to the MME through the "UE Network Capability" field and the "MS Network Capability" field in the NAS signaling Attach Request or Tracking Area Update Request message that its capability supports the SRVCC process to UTRAN / GERAN, but does not support the SRVCC process to CDMA2000lxRTT ;

[0055] The MME judges that the core network capabilities support both UTRAN / GERAN and CDMA2000lxRTT SRVCC capabilities. After integrating the SRVCC capabilities of the UE, only the "SRVCC Operation Possible" field is included in the Initial UE Context Setup Request or Handover Request message sent to the eNB. The bit position corresponding to SRVCC to UTRAN / GERAN is "TRUE".

[0056] The UE initiates a voice service in E-UTRAN. Since it reaches the coverage edge of the E-UTRAN network...

Embodiment 3

[0058] In this embodiment, the UE is capable of supporting two SRVCC procedures, but the core network only supports UTRAN / GERAN SRVCC, and the processing method for switching the target cell to a UTRAN / GERAN cell is shown in Image 6 .

[0059] The UE indicates the MME through the "UE Network Capability" field and the "MS Network Capability" field in the NAS signaling Attach Request or Tracking Area Update Request message, and its capability supports both the SRVCC process to UTRAN / GERAN and the SRVCC process to CDMA2000lxRTT;

[0060]The MME judges that the core network capability only supports the SRVCC capability of UTRAN / GERAN, but not the SRVCC capability of CDMA2000lxRTT. After integrating the SRVCC capability of the UE, only "SRVCC The bit position corresponding to SRVCC to UTRAN / GERAN in the Operation Possible" field is "TRUE".

[0061] The UE initiates a voice service in E-UTRAN. Since it reaches the coverage edge of the E-UTRAN network, it triggers the reporting of ...

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Abstract

The invention relates to a method and a system for realizing radio voice call continuity (RVCC). The method comprises the following steps that a core network determines and sends single RVCC (SRVCC) ability information shared with user equipment (UE) initiating the radio voice to a current radio access network system, wherein the shared SRVCC ability information shows the SRVCC ability information to different radio access network systems; and after the UE initiates the radio voice, the current radio access network system judges to trigger SRVCC to a target cell when judging that the SRVCC ability information sent by the core network shows support of the SRVCC ability to the target cell corresponding to the inter-system measurement report. By adopting the method and the system, the current radio access network system can correctly trigger the SRVCC flow and avoid handover failure.

Description

technical field [0001] The present invention relates to a mobile communication system, more specifically, to a method and system for realizing voice service call continuity. Background technique [0002] SRVCC (Single Radio Voice Call Continuity, single voice call continuity) function is to ensure that voice service users move from LTE (Long Term Evolution, long-term evolution) network to UTRAN (UMTS Terrestrial Radio Access Network-UMTS Terrestrial Radio Access Network) / GERAN (GSM EDGE Radio Access Network, GSM / EDGE wireless access network) or CDMA2000lxRTT (a CDMA2000 type based on radio transmission technology (RTT)) system, the continuity of voice services. [0003] In the initial stage of LTE network deployment, the coverage of the entire network will not be achieved, but the coverage of hotspot areas will be mainly covered. When the deployed LTE network provides VoIP (voice) services, users who initiate VoIP services in the LTE network will leave the coverage of LTE. ...

Claims

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Application Information

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IPC IPC(8): H04W4/16H04W36/30H04W76/04
Inventor 刘静
Owner ZTE CORP
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