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YD/T 2638.3-2024Technical requirements for priority calling in public telecommunication networks - Part 3: LTE network (English PDF)

公众电信网优先呼叫技术要求第3部分：LTE网络

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Issued by

Ministry of Industry and Information Technology

Level / Type

National · Recommended

Issue date

December 10, 2024

Implementation date

April 1, 2025

Scope

YD/T 2638.3-2024 is the English-translated version of 公众电信网优先呼叫技术要求第3部分：LTE网络.

YD/T 2638.3-2024 is the Chinese standard "Technical requirements for priority calling in public telecommunication networks - Part 3: LTE network".

This standard applies to terminal equipment, wireless subsystem equipment, EPC core network, and IMS system equipment for VoLTE services using priority call technology.

It was issued by Ministry of Industry and Information Technology. Issued on 2024-12-10, in force from 2025-04-01.

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Document preview — YD/T 2638.3-2024

National Standard of the People's Republic of China

ICS: 33.060
Classification: M36

Issued by: Ministry of Industry and Information Technology

1 Foreword

YD/T 2638.3-2024 was issued by Ministry of Industry and Information Technology on 10 December 2024 and has been in force since 1 April 2025.

It is one of 2 parts of the YD/T 2638 series.

2 Scope

This standard specifies the priority call technology of VoLTE based on LTE network in public telecommunications networks, including the functional description, parameter settings, message flow, and equipment functional requirements of priority access control technology and user priority access enhancement technology. This standard applies to terminal equipment, wireless subsystem equipment, EPC core network, and IMS system equipment for VoLTE services using priority call technology.

3 About this standard

Sector: Telecommunication Industry Standard (Recommended)

Issued by: Ministry of Industry and Information Technology

English translation: about 15 pages (approximate)

4 Related standards

Other parts of this standard:

YD/T 2638.2-2018 — Public telecommunication network priority call technical requirements Part 2: CDMA network

5 Classification and status

International classification (ICS): 33.060

Chinese Standard Classification (CCS): M 36

Prefix YD/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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