5G SA核心网融合计费方案设计与实践

doi:10.11959/j.issn.1000-0801.2022114

Abstract

Abstract:

There are some challenges of direct communication and converged charging in large SA network construction to be solved.A converged charging project based on SCP and customized CG was proposed, following by analysis of how to meet converged charging requirements of large operators.Technology details of several cases and presents target evolution were compared.Finally, the deployment practice in commercial construction was described.

Key words: SCP, converged charging, CG, CHF, 5G SA

CLC Number:

TN929.5

Dongfeng MAO, Song JIANG, Qing WANG. 5G SA converged charging project design and practice[J]. Telecommunications Science, 2022, 38(Z1): 128-133.

UDM/PCF数量m	AMF/SMF数量n	直接通信连接数（假设每个网元和对端平均建16个连接，含客户端和服务端）	平均每网元连接数
100	200	100×200×16=320 000	320 000/300=1 067
300	500	300×500×16=2 400 000	2 400 000/800=3 000

方案	方案一	方案二	方案三
组网方式	CG旁挂方式	CG串联方式	SCP与CG功能合一为SCP+网元
架构	类似4G架构，CG是话单存储网元，旁挂对计费消息主转发路径无影响，网元功能定位清晰	CG 作为话单存储网元，串接在计费消息转发路径上，需要支持消息转发功能	话单存储、路由转发功能合一，组网简单
功能	需要定制SMF网元接口，支持CG旁挂计费消息的复制等功能	SMF无需定制，只需定制CG网元	SCP+需要定制，功能融合影响后续SCP网元演进
计费	满足计费全消息交互、异常计费、省间漫游结算需求，时延相对较小	满足计费全消息交互、异常计费、省间漫游结算需求，时延由于CG的串联，略大	满足计费全消息交互、异常计费、省间漫游结算需求，时延相对较小
安全	故障点少，可靠性高	CG 故障仅影响计费消息，通过优化设计容灾方案提升可靠性	故障点少，可靠性高

[1]	3GPP. 3rd Generation partnership project; technical specification group services and system aspects; system architecture for the 5G system stage 2 (release 15):TS 23.501 V15.4.0[S]. 2018.
[2]	3GPP. 3rd generation partnership project; technical specification group services and system aspects; telecommunication management; charging management; charging architecture and principles (Release 16):TS 32.240 V16.0.0[S]. 2019.
[3]	3GPP. 3rd generation partnership project; technical specification group services and system aspects; telecommunication management; charging management; 5G system charging service Stage 3 (Release 16):TS 32.291 V16.1.1[S]. 2019.
[4]	3GPP. 3rd Generation partnership project; technical specification group services and system aspects; system architecture for the 5G system stage 2 (Release 16):TS 23.501 V16.6.0[S]. 2020.

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5G SA converged charging project design and practice

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