A method and system for realizing continuous voice call in emergent service

Abstract

The method includes steps: (1) urgent call center PSAP and one party in user equipment (UE) in source domain initiates urgency traffic request to the other party; (2) network entity determines whether the condition for triggering service of urgent call continuity is satisfied; if yes, the urgency traffic is anchored to voice call continuity (VCC) application server (AS); and the UE in source domain establishes talking connection with PSAP; (3) based on anchored the urgency traffic, VCC AS implements VCC service. The invention also discloses the system in use for implementing VCC in urgency traffic. Thus, the invention realizes VCC in switching time between source domain and target domain when urgency traffic is carrying on.

Description

technical field [0001] The invention relates to network communication technology, in particular to a method and system for realizing voice call continuity in emergency business. Background technique [0002] Currently, the communication industry has proposed the concept of Voice Call Continuity (VCC), which is a contracted IP Multimedia Subsystem (IMS) application service in the user's home domain. The so-called IMS is an IP multimedia subsystem defined by the 3rd Generation Mobile Communications Standardization Partnership Project (3GPP) standard. target network. [0003] A user capable of simultaneously accessing the IMS domain and the circuit switched (CS) domain is called a VCC user terminal (UE). In common voice call continuity services, all calls initiated or received by a UE must first be anchored to a VCC application server (AS) with domain switching control functions in the IMS domain to which the UE belongs, and anchored to the VCC AS Updating here refers to sav...

AI Technical Summary

Problems solved by technology

[0006] It can be seen that in the prior art, when the UE initiates an emergency service in the IMS domain, the user's subscription information cannot be obtained because the emergency service initiated by the user in the visited domain is processed by a special call session unit or the user does not have a card or the card holder is not registered. Therefore, the session unit cannot anchor the voice call to the VCC AS in the user's home IMS domain through the initial filtering rule (iFC); when the UE initiates an emergency voice call service in the CS domain, it cannot touch the intelligent service, so it cannot anchor the emergency call Set to the VCC AS of the user's home IMS domain

When the UE that initiates the emergency service is handed over between the IMS domain and the CS domain, since the emergency call cannot be anchored to the VCC AS, the voice call continuity of the emergency service handover between the source domain and the destination domain cannot be achieved

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