Method and apparatus for implementing voice continuity of conversation

Abstract

The invention provides a method for realizing the voice continuity of a session and a device. The method comprises the following steps that: when the switching is needed between a source network and a target network, the technical proposal that the voice continuity is realized on a bearing level can be adopted; if a target network grouping domain does not support VoIP, the signaling bearer of the session is switched to the target network grouping domain, and the voice bearer of the session is switched to a target network circuit domain; a PCC framework is utilized to process a subsequent signaling which is switched from the source network to the target network circuit domain in order that the whole process of the voice continuity keeps transparent to a business network; on the basis of not needing to upgrade and reform the business network, the voice business continuity of the session and the normal use of other business in the business network are ensured; at the same time, when the target network needs to be switched to the source network subsequently, the PS switching from the target network to the source network is utilized to trigger that the voice data and the signaling of the subsequent session are switched back to the source network.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for realizing voice continuity of a conversation. Background technique [0002] With the development of SAE / LTE (System Architecture Evolution / Long Term Evolution, System Architecture Evolution / Long Term Evolution) network technology, the SAE / LTE network has covered some urban areas and traffic hot spots, resulting in the current communication network, SAE / LTE network and 2G / 3G (2nd Generation / 3rd Generation, second generation mobile communication technology / third generation mobile communication technology) network coexist. The user who initiated the call may cross two networks during a call. In order to ensure that the user's call is not interrupted, it is necessary to switch between the SAE / LTE network and the 2G / 3G network. [0003] According to different network bearer mechanisms, mobile communication service applications can be divided into the fo...

AI Technical Summary

Problems solved by technology

[0008] After years of development, the 2G / 3G network can be regarded as a kind of comprehensive coverage to some extent. Due to the difference in the deployment of the SAE / LTE network and the 2G / 3G network, and in different networks, mobile communication The difference in the service bearing mechanism causes when UE (User Equipment, user equipment) moves out of the coverage area of ​​the base station of the SAE / LTE network and enters the coverage area of ​​the base station of the 2G / 3G network, if the UE has an IMS voice service carried on the SAE / LTE network , the IMS voice service may be interrupted, thereby affecting the continuity of the user's voice service

[0058] In addition, after switching from the SAE / LTE network to the GSM CS domain, in order to maintain the SIP session, the P-CSCF must register with the IMS as a UE proxy, and corresponding modifications and upgrades to the IMS network are also required;

[0059] 3) After switching from the SAE / LTE network to the GSM CS domain, since the Serving / PDN SAE Gateway is required to have the ability to convert SIP signaling into ISUP signaling with corresponding content, the complexity of the Serving / PDN SAE Gateway will be increased;

[0060] 4) After switching from the SAE / LTE network to the GSM CS domain, because the IP data cannot be transmitted normally, the IP-based services in the IMS network cannot be used normally;

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