YD/T 4529-2023
SDN-based IP RAN southbound interface technical requirements (English Version)

Standard No.

YD/T 4529-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Post and Telecommunication  CN  /  YD

Latest

YD/T 4529-2023

Introduction

Analysis of Standard Technical Framework

This standard proposes complete technical specifications for the southbound interface of IP RAN equipment under the SDN architecture. The core includes:

Technical Dimensions	Traditional Solutions	SDN Enhanced Requirements
Control Protocol	CLI/SNMP-based	Netconf+PCEP+BGP-LS Combination
Data Model	MIB Library	YANG 1.1 Standardized Modeling
Topology Discovery	Static configuration	BGP-LS dynamic synchronization

---

Key technical requirements

1. Protocol stack specifications

The southbound interface protocol stack adopts a four-layer architecture:

1. Netconf: Basic configuration channel, SSH encrypted transmission, mandatory support for the seven basic operation instructions defined in RFC6241
2. PCEP: Path calculation protocol, which needs to implement RFC8231 state synchronization and SR function extension
3. BGP-LS: Topology collection protocol, requiring support for three types of TLV formats: Node/Link/Prefix
4. Telemetry: Data collection channel, supporting gRPC/UDP dual protocol stack

2.

YANG modeling follows the three-layer specification system:

Model level	Example module	Key constraints
Configuration management	mpls/segment-routing	List objects must define the Container packaging layer
Fault management	alarm	Alarm levels must be clearly defined using enumeration
Performance management	performance	15-minute/24-hour performance statistics separate storage

---

Implementation recommendations

Device compatibility solution

For the transformation of traditional equipment, it is recommended to adopt a gradual migration strategy:

• Phase 1: Implement NETCONF protocol conversion through the CLI adaptation layer
• Phase 2: Deploy the YANG model conversion engine on the network management side
• Phase 3: Gradually enable the PCEP path calculation function to replace static routing

Typical deployment cases

After a provincial operator adopted this standard to build an IP RAN intelligent management and control system:

1. Service provisioning time was shortened from hours to minutes
2. Fault location efficiency was improved by 300%
3. Link utilization statistics accuracy reached 99.99%

YD/T 4529-2023 history

• 2023 YD/T 4529-2023 SDN-based IP RAN southbound interface technical requirements

Standard and Specification