GB/T 34992-201712.5kHz TDMA channel based professional digital trunking communication system—Technical specifications for call control layer of air interface (English PDF)
基于12.5kHz信道的时分多址（TDMA）专用数字集群通信系统 空中接口呼叫控制层技术规范
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 1, 2017
Implementation date
February 1, 2018
Scope
GB/T 34992-2017 is the English-translated version of 基于12.5kHz信道的时分多址（TDMA）专用数字集群通信系统 空中接口呼叫控制层技术规范.
GB/T 34992-2017 fixes the call control layer of the air interface of a professional digital trunking communication system working on 12.5 kHz TDMA channels.
Clause 1 states that the standard specifies the address code, the protocol data unit format, the message sequences and the parameter definitions of that call control layer, and that it applies to such systems, called cluster systems in the text, in the frequency range from 30 MHz to 1 GHz.
The document is built in six clauses, Scope, Normative references, Terms, definitions and abbreviations, an overview covering the protocol architecture and the address mapping table, the routine business of the cluster system, with subclauses on the general business overview, general business, voice services, supplementary services, the general protocol data unit, the general protocol information element and conventional protocol control frame coding, and the cluster business of the cluster system, with subclauses on its basic provisions, the data link layer and the call control layer.
An informative appendix describes the message sequence diagram notation and a normative appendix gives the ESN checksum algorithm, and the front matter lists seventy-eight figures and one hundred and eighty-five tables, the tables running from the address mapping table and the burst type tables to the protocol data unit and information element contents.
Clause 3 defines the power-save frame, of sixteen time slots and 480 ms, used to wake a dormant mobile station, the dedicated control channel, the composite control channel, the received signal strength indicator (RSSI), the alias and the partition (PAR).
Clause 2 cites GB/T 34991-2017 on the physical layer and data link layer of the same air interface, and the foreword places the standard in a series of six specifications for this type of system, covering general technical requirements, the physical and data link layers, this call control layer, mobile terminals, security and system interconnection.
The introduction carries a patent declaration, with an undertaking by the holders to negotiate licences on reasonable and non-discriminatory terms. The foreword names the National Communications Standardization Technical Committee (SAC/TC485) as the body in charge. It was issued on 1 November 2017 and has applied since 1 February 2018.
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Document preview — GB/T 34992-2017
National Standard of the People's Republic of China
- ICS
- 33.060.99
- Classification
- M 36
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and abbreviations
- 3.1 Terms and definitions
- 3.2 Abbreviations
- 4 Overview
- 4.1 protocol architecture
- 4.2 Address Mapping Table
- 5 cluster system routine business
- 5.1 Cluster System General Business Overview
- 5.2 General Business
- 5.3 Voice Services
- 5.4 Supplementary Services
- 5.5 General Protocol Data Unit
- 5.6 General Protocol Information Element
- 5.7 Conventional Protocol Control Frame Coding
- 6 cluster system cluster business
- 6.1 The basic provisions of the cluster business
- 6.2 Data Link Layer
- 6.3 Call Control Layer
- Appendix A (Informative) Message Sequence Diagram (MSC) Description
- Appendix B (Normative) ESN checksum algorithm
Foreword
This standard is based on 12.5kHz channel time division multiple access (TDMA) dedicated digital trunking communications system standard series. The series The standard structure and name are estimated as follows.
--- Based on 12.5kHz channel time division multiple access (TDMA) dedicated digital trunking communications system general technical specifications;
--- 12.5kHz channel-based time division multiple access (TDMA) dedicated digital trunking communication system air interface physical layer and data link Road technical specifications;
--- 12.5kHz channel-based time division multiple access (TDMA) dedicated digital trunking communication system air interface call control layer technology specification;
--- 12.5kHz channel-based time division multiple access (TDMA) dedicated digital trunking communication system mobile terminal technical specifications;
--- 12.5kHz channel-based time division multiple access (TDMA) dedicated digital trunked communication system security technical specifications;
--- 12.5kHz channel-based time division multiple access (TDMA) dedicated digital trunking communication system system interconnection specifications.
This standard was drafted in accordance with the rules given GB/T 1.1-2009.
Introduction
The issuing authority of this document draws attention to the fact that statements that conform to this document may relate to 6.3.4.8 and Handover, 5.3.2 and Conference Calling Use of patents related to dynamic grouping.
The issuing authority of this document has no position whatsoever about the truthfulness, validity and scope of this patent.
These patent holders have assured the issuing authorities of this document that they are willing to cooperate with any applicant on reasonable and non-discriminatory terms and conditions Under the pieces, negotiate a patent license. The statement of these patent holders has been filed with the issuing authority of this document.
The patent holders named are Harbin Hainengda Technology Co., Ltd. and Hanergy Co., Ltd.
Please note that in addition to the above patents, some of the contents of this document may still involve patents. The issuing agencies of this document are not responsible for identifying these patents.
1 Scope
This standard specifies a 12.5kHz channel-based time division multiple access (TDMA) dedicated digital trunking communication system air interface call control Layer address code, protocol data unit format, message sequence and parameter definitions.
This standard applies to the frequency range of 30MHz ~ 1GHz based on 12.5kHz channel time division multiple access (TDMA) dedicated digital Cluster communication system (hereinafter referred to as "cluster system").
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 34991-2017 based on 12.5kHz channel time division multiple access (TDMA) dedicated digital trunking communication system air interface Physical layer and data link layer technical specifications
3 Terms, definitions and abbreviations
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1 Power-saving frame
power-save-frame Contains 16 time slots (480ms), used to wake up dormant mobile station basic timing unit.
3.1.2 Dedicated control channel
Control channels that can not be converted to traffic channels or other types of channels.
3.1.3 Composite control channel
It can be temporarily converted into a control channel used by the traffic channel.
3.1.4 Received signal field strength
received signal strength indicator; RSSI The rms signal power received by the receiver at the antenna.
3.1.5 Alias
For ease of user memory, the number, channel, etc. defined mnemonic.
3.1.6 Partition
partition PAR Information element used to divide a mobile station on a cluster base station with dual control channel (TSCC).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 168 pages — is available in the English PDF.
Referenced standards
Normative references
Cited by
- GB/T 46920-2025Professional digital trunking communication systems based on 12.5 kHz TDMA channels - Technical requirements for security
- GB/T 46922-2025Professional digital trunking communication systems based on 12.5 kHz TDMA channels - Technical specification for system interconnection
- GB/T 46923-2025Professional digital trunking communication systems based on 12.5 kHz TDMA channels - General technical requirements
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