YD/T 4463-2023
SDN-based metropolitan integrated IP bearer network architecture (English Version)

Standard No.

YD/T 4463-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Post and Telecommunication  CN  /  YD

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YD/T 4463-2023

Introduction

Analysis of Standard Core Architecture

Architecture Levels	Traditional Network	SDN Integrated Bearer Network	Technological Breakthrough
Control Plane	Distributed Control	Centralized SDN Controller	Global Topology View
Forwarding Plane	Dedicated Hardware	General-purpose x86 Server	NFV Virtualization
Management Plane	CLI Configuration	REST API Orchestration	Automated deployment

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Key technical features

1. Integrated bearing of fixed and mobile services

Through Multi-service aggregation gateway (MSG):

• Fixed network side: vBRAS architecture is adopted, and the U plane reuses the old BNG equipment
• Mobile network side: S/PGW-U is sunk to the aggregation layer
• EVPN technology realizes differentiated QoS marking

2. Network flattening transformation

Typical application: In the 5G mobile backhaul scenario, the SGi interface is used to directly connect to the Internet, reducing the two IP RAN layers and reducing the latency by 40%

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Implementation suggestions

Phase-based evolution route

1. Pilot phase: Select 2-3 aggregation nodes to deploy MSG-U
2. Scale deployment: Cloudify the control plane and adopt SR+EVPN technology
3. Full network integration: Realize the sinking of all CDN nodes

API interface specification

Interface type	Protocol	Function
Northbound interface	REST	Service activation/resource management
Southbound interface	NETCONF	Device configuration delivery

YD/T 4463-2023 history

• 2023 YD/T 4463-2023 SDN-based metropolitan integrated IP bearer network architecture

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