基于5G网络的VoWi-Fi互操作研究

doi:10.11959/j.issn.1000-0801.2023113

Abstract

Abstract:

By referring to the service network architecture and interoperation scheme of VoWi-Fi under 4G, the differences of the service network architecture and interoperation scheme of VoWi-Fi under 5G were studied and analyzed.Under the current situation that the network and terminal industry chain didn’t support the interoperability between standalone (SA) and Wi-Fi, a workaround scheme for interoperation in the transitional period was proposed, and the terminal and network side configuration suggestions were given to realize the interoperation between VoWi-Fi and VoLTE based on 5G network to ensure that users were unaware.The feasibility of this scheme was verified by practical tests.It provides reference for the actual deployment of VoWi-Fi.

Key words: 5G, VoWi-Fi, VoNR, VoLTE, handover

CLC Number:

TN929.5，TN92

Hao XU, Lin WU. Research on VoWi-Fi interoperability based on 5G network[J]. Telecommunications Science, 2023, 39(5): 144-154.

技术方案	与UE间的接口	与5G核心网的接口	部署难度	功能扩展	产业链
延用ePDG	SWu	S2b-C、S2b-U	容易	单一	已支持
引入N3IWF	NWu	N2、N3	较难	便于扩展	暂不支持

业务状态	切换方向	切换结果	变通方案
业务态	VoNR→VoWi-Fi	切换掉话	VoNR→VoLTE→VoWi-Fi
空闲态	SA→Wi-Fi	切换失败，保持在原网络	在目标网络发起初始附着请求
业务态	VoWi-Fi→VoNR	切换掉话	VoWi-Fi→VoLTE
空闲态	Wi-Fi→SA	切换失败，保持在原网络	在目标网络发起初始附着请求

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Research on VoWi-Fi interoperability based on 5G network

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