Decision-making voice over LTE (VoLTE) final call domain selection method and system

A long-term evolution voice and decision-making technology, applied in the field of communication, can solve problems such as call establishment failure

Active Publication Date: 2018-01-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the embodiments of the present invention is to provide a voice over long term evolution (VoLTE) call domain selection method, device and system to solve the problem of call establishment failure due to signal coverage or user roaming during the VoLTE call establishment process

Method used

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  • Decision-making voice over LTE (VoLTE) final call domain selection method and system
  • Decision-making voice over LTE (VoLTE) final call domain selection method and system
  • Decision-making voice over LTE (VoLTE) final call domain selection method and system

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Experimental program
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Embodiment 1

[0060] Embodiment 1 of the present invention provides a VoLTE terminal call domain selection method, such as figure 1 As shown, the method includes:

[0061] S101. UE_A sends an INVITE message to I-CSCF_B;

[0062] S102. After receiving the INVITE message, the I-CSCF_B sends an LIR message to the HSS, requesting to acquire the S-CSCF_B address registered by the UE_B.

[0063] In this embodiment, the HSS is a converged HLR / HSS, which can detect whether the user is registered in the CS network.

[0064] S103. After the HSS receives the LIR message, since UE_B will register the S-CSCF address in the HSS during registration, the HSS will send a LIA message carrying the server address of S-CSCF_B to I-CSCF_B. At the same time, the integrated HLR / HSS detects that the user has registered in the CS network, and the LIA message carries the T-ADS suppression parameter.

[0065] Wherein, when the T-ADS suppression parameter is the first value (such as 0), it means no suppression; when...

Embodiment 2

[0077] Embodiment 2 of the present invention provides a VoLTE call domain selection method, such as figure 2 As shown, the method includes:

[0078] S201. UE_A sends an INVITE message to I-CSCF_B;

[0079] S202. After receiving the INVITE message, the I-CSCF_B sends an LIR message to the HSS, requesting to acquire the S-CSCF_B address registered by the UE_B.

[0080] S203. After the HSS receives the LIR message, since the UE_B will register the S-CSCF address in the HSS during registration, the HSS will send the LIA message carrying the server address of the S-CSCF_B to the I-CSCF_B.

[0081] S204. After receiving the INVITE message, the S-CSCF_B triggers the VoLTE AS_B according to the IFC data of the called user.

[0082] S205. The VoLTE AS_B sends a Sh interface UDR message to the HSS, requesting to obtain T-ADS information.

[0083] S206-211. The UE roams in the LTE network and re-registers with the MME2.

[0084] S212, the HSS itself integrates the SAE-HSS function, ...

Embodiment 3

[0094] Embodiment 3 of the present invention provides a VoLTE call domain selection method, such as image 3 As shown, the method includes:

[0095] S301. UE_A sends an INVITE message to I-CSCF_B;

[0096] S302. After receiving the INVITE message, the I-CSCF_B sends an LIR message to the HSS, requesting to acquire the S-CSCF_B address registered by the UE_B.

[0097] S303. After the HSS receives the LIR message, because the UE_B will register the S-CSCF address in the HSS during registration, the HSS sends the LIA message carrying the server address of the S-CSCF_B to the I-CSCF_B.

[0098] S304. After receiving the INVITE message, the S-CSCF_B triggers the VoLTE AS_B according to the IFC data of the called user.

[0099] S305. The internal logic of the VoLTE AS_B judges that the CS network should be selected, and sends a Sh interface UDR message to the HSS, requesting to obtain a CSRN number.

[0100] S306-S309. The UE roams on the CS network and re-registers with the MSC ...

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Abstract

The invention provides a decision-making voice over LTE (VoLTE) call domain selection method and system, belonging to the field of communication technology. The method comprises the following steps: an HSS detects that a terminal has been registered in a CS network after receiving an LIR message, and sends an LIA message that carries suppression T-ADS parameters to I-CSCF_B; an S-CSCF_B receives aterminal INVITE message, and then sends the terminal INVITE message that carries the suppression T-ADS parameters to VoLTE AS_B according to IFC data of a called terminal; and the VoLTE AS_B receivesthe INVITE message, and then detects the suppression T-ADS parameters, and sends a UDR message to the HSS to acquire a CSRN. According to the method and system provided by the invention, the problemthat the call establishment fails due to signal coverage or user roaming in a VoLTE call establishment process can be solved, and the smooth communication can be guaranteed.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and system for selecting a long-term evolution voice terminal domain. Background technique [0002] IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) is the development direction of multimedia communication in the future, and it is also the most important component of the next generation network. It is a subsystem supporting IP multimedia services proposed by the Third Generation Partnership Project (Third Generation Partnership Project, 3GPP). [0003] VoLTE based on an IP Multimedia Subsystem (IP Multimedia System, IMS) is a major development direction recognized by 3GPP for a voice solution over an LTE network. [0004] Due to the insufficient coverage in the early stage of LTE network deployment, in order to ensure the continuity of voice services, it is necessary to use Single Radio Voice Call Continuity (SRVCC) technology to utilize the existin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/14H04W76/10H04W76/19H04L29/06
Inventor 仝黎
Owner ZTE CORP
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