YD/T 3974-2021 in English

VALID

5G network slicing technica I requirements for end- to- -end forward ing and control plane interworking based on SPN transport network

Issued on:2021-12-02
Implemented on:2022-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $270.00
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Standard No:	YD/T 3974-2021
Document status:	VALID
Title in English:	5G network slicing technica I requirements for end- to- -end forward ing and control plane interworking based on SPN transport network
Title in Chinese:	5G 网络切片基于切片分组网络（SPN）承载的端到端切片对接技术要求
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2021-12-02
Implemented on:	2022-04-01
Professional Classification:	YD-Telecommunication
Related Keywords:	spn transport network introduction analysis private network slicing1:1 mapping type hard isolation slice transport layer collect spn port/vlan resource pool information slice instantiation four basic slicing service types
Related Topics:	docking slice network fabric slice Coated Tablets Requirements for Tablet Cores slice box Slicing Freehand Slicing cut slice slice thin slices main components of the network SPNs ptt slice slicing semi-thin sliced slices capacitor slice Slice Test Requirements capacitor slice network chip pole piece cutting YD/T 5167-2021 Tissue sectioning principle FIB slicer leica3050s slicer Enzyme fragmentation biological tissue slicer slicer place slicer place yd/t202408-2021 Pathology microtome

本文件规定了基于SPN 承载的网络端到端切片架构、SPN网络切片能力、切片对接流程、转发层切片对接要求、网络切片管控层协同对接要求等。
本文件适用于基于SPN 承载的端到端 5G 网络切片的研发和测试。

Introduction

Analysis of 5G network slicing architecture carried by SPN

The end-to-end slicing architecture based on SPN adopts a three-layer collaborative design:

Layer	Technical composition	Isolation capability
Slice Packetization Layer (SPL)	MPLS-TP/SR technology	L2/L3 soft isolation
Slice Channel Layer (SCL)	MTN TDM switching	L1 hard isolation
Slice Transport Layer (STL)	Ethernet/WDM	L0 physical isolation

Comparison of Four Basic Slicing Service Types

The four types of slicing service types defined by the standard have significant differences in isolation and resource reuse:

Type	Resource characteristics	Applicable scenarios	Typical configuration
Type 1	Dedicated MTN channel + dedicated VPN	VIP private network slicing	1:1 mapping
Type 2	Shared MTN channel + dedicated VPN	Industry private network	1:N mapping
Type 3	Shared MTN channel + shared VPN	eMBB service	N:N mapping
Type 4	Fully shared resources	Ordinary service	QoS priority differentiation

Key technologies for forwarding layer docking

The standard adopts the triple identification scheme of port+VLAN ID+priority:

VLAN ID: locally valid, supports 4K space allocation
Priority mapping: the default conversion rule of 5QI→DSCP/VLAN PRI (such as 5QI1 corresponds to EF46/DSCP5)
Secondary mapping is implemented in the SPN through MPLS label stack and MTN encapsulation

Control and management plane collaboration mechanism

The interaction process between NSMF and NSSMF includes three key stages:

Resource pre-negotiation: Collect SPN port/VLAN resource pool information
Slice instantiation: Decompose SLA requirements and issue them to TN/AN/CN NSSMF
Identifier mapping: Establish a many-to-many association between S-NSSAI and NSSI

Typical deployment case: A smart manufacturing park adopts a Type 1 + Type 3 hybrid solution. Key control instructions are guaranteed by dedicated MTN channels, and monitoring data is carried by shared VPN.

Implementation Suggestions

Focus on standard implementation:

Resource planning: It is recommended to adopt a hierarchical VLAN allocation strategy (independent numbering for access layer/core layer)
QoS assurance: It is necessary to unify the 5QI-DSCP mapping table and pre-set emergency plans
Operation and maintenance collaboration: Establish a cross-domain KPI correlation analysis mechanism

More samples: QC/T 942-2021 GB 18306-2015 DL/T 5154-2012

Sample only — not a preview of YD/T 3974-2021

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