GB/T 7262: Evolution and historical versions
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Technical requirement and equipment arrangement for highway communication
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Basic data | Standard ID | GB/T 7262-2025 (GB/T7262-2025) | | Description (Translated English) | Technical requirement and equipment arrangement for highway communication | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2025-12-01 | | Older Standard (superseded by this standard) | GB/T 7262-2009 | GB/T 7262-2009: Technical requirements and equipment arrangement for highway communication---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical requirements and equipment arrangement for highway communication
ICS 03.220.20; 33.020
M11
National Standards of People's Republic of China
Replacing GB/T 7262.1-1993, GB/T 7262.2-2001, GB/T 7262.3-2001
Road communication technology requirements and equipment configuration
2009-09-30 release
2010-02-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
This standard replaces GB/T 7262.1-1993 "General technical requirements for road communication and equipment," GB/T 7262.2-2001 "Highway
Communication technology requirements and equipment equipped with equipment and "and GB/T 7262.3-2001" road communication technical requirements and equipment with the network
skills requirement".
The main changes in this standard compared with GB/T 7262.1-1993, GB/T 7262.2-2001 and GB/T 7262.3-2001 are as follows.
- the deletion of the "Classification of Road Communications Centers", the division of the principle (see GB/T 7262.2-2001 and 4.1 of this standard);
- Increased technical requirements and equipment configuration requirements for road emergency communications systems (see 5.1.3 and 5.9);
--- increased the requirements of the Ethernet interface (see 5.7.4);
- increased the requirements of the pipeline network (see 5.8);
--- delete the contents of the digital microwave (see GB/T 7262.3-2001 4.2);
- delete the relevant content of the shortwave single sideband (see 4.5 of GB/T 7262.3-2001);
- the contents of the cluster mobile communication system are deleted (see 4.6 of GB/T 7262.3-2001);
Amend appendix A.
Appendix A of this standard is a normative appendix.
This standard is proposed by the Ministry of Transport of the People's Republic of China.
This standard by the Ministry of Communications Information and Navigation Standardization Technical Committee.
The drafting unit of this standard. China Transportation and Communication Center.
The drafters of this standard. Wang Zhi, Hu Song.
This standard replaced the previous version of the standard release.
--- GB 7262.1-1987, GB/T 7262.1-1993;
--- GB/T 7262.2-1991, GB/T 7262.2-2001;
GB/T 7262.3-1991, GB/T 7262.3-2001.
Road communication technology requirements and equipment configuration
1 Scope
This standard specifies the basic technical requirements and basic configuration of the system equipment for the design, design and networking of the highway communication network
in principle.
This standard applies to the construction and reconstruction of highway communication networks.
2 normative reference documents
The terms of the following documents are hereby incorporated by reference into this standard. Whichever is the date of the reference file, which is followed by all
(Excluding corrigenda) or revisions do not apply to this standard, however, encourage the parties to reach an agreement under this standard
Whether you can use the latest version of these files. For undated references, the latest edition of this document applies to this standard.
GB/T 7611-2001 Digital network series Bit rate Electrical interface characteristics
JT/T 703 Expressway Emergency Telephone System
Code for design of communication pipe and channel for YD5007
Access network technology system YDN061-1997
Postal and telephone telephone exchange equipment - General technical specification book YDN065-1997
Technical requirements for Ethernet switches
Code for design of SDH local network fiber optic cable transmission project YD/T 5024-2005
Code for design of installation of fixed telephone exchange equipment YD/T
Code for design of digital synchronous network engineering YD/T
Code for engineering design of SDH long - distance optical fiber transmission system YD/T 5095-2005
Code for design of installation of cable access network equipment YD/T 5139-2005
ITU-TG. 811 full network reference clock timing characteristics G series (TimingCharacteristicsofPrimaryReference
Clocks-SeriesG)
3 terms and definitions, abbreviations
3.1 Terms and definitions
The following terms and definitions apply to this standard.
3.1.1
To high-grade highway communication facilities for the transmission backbone, for the road management and business departments, related business-specific communication network. Road communication
The network includes conventional communication networks and emergency communication facilities. In this standard, only the conventional communication networks are specified.
3.2 abbreviations
The abbreviations in Table 1 apply to this standard.
Table 1
Abbreviations English Chinese
OTN OpticalTransportNetwork Optical Transport Network
PDH PlesiochronousDigitalHierarchy quasi-synchronous digital system
Table 1 (continued)
Abbreviations English Chinese
SDH SynchronousDigitalHierarchy Synchronous digital system
SONET SynchronousOpticalNetworking
STM SynchronousTransportModule Synchronous transfer module
4 General
4.1 classification of highway communication network
4.1.1 The road network is divided into the following three levels.
a) a communication network. set up national highway communication network center, connecting provinces, autonomous regions and municipalities communications network;
b) secondary communication network. set up provinces, autonomous regions and municipalities highway communications network center, connecting the local (city) or road highways;
c) three-level communication network. set up (city) or road section of the road sub-centers, connecting the management, service departments, toll stations of the road communication network.
4.1.2 Highway hub, transport enterprises and other business units Communication network should be included in two or three highway communication network management.
4.2 Composition and business type of highway communication network
4.2.1 Road communication network from the logic function by the business network, transport network and support network.
4.2.2 highway communication network transmission network currently has PDH, SDH/SONET, OTN and other types; support network, including network management network, signaling network
And synchronous network.
4.2.3 Road communication network business types include voice, images and data.
a) The voice service mainly includes business telephone, directive telephone, intercom telephone, emergency telephone and other services, including G3 fax;
b) The image business mainly includes static images or dynamic images for high-grade highway operations management monitoring systems, charging systems, and
Including road traffic, transportation, inspection, construction management and rescue and other required image information, divided into digital images and analog
image;
c) data services, including road operations management and monitoring system, charging system data and government information, security information and other management data.
4.3 Principles of resource allocation for highway communication networks
4.3.1 highway communication network in the planning and design of the area should deal with the public communication network capacity, the need for comprehensive consideration of road communications to
Determine the mode of communication and its size.
4.3.2 Highway communication network in the new construction, reconstruction, should be based on existing infrastructure and channel resources for system configuration, should be regional, provincial and
National communications network platform resource integration using the design of the necessary backup, reserved, in the network structure design necessary extension and detour
routing.
4.3.3 All levels of communication network in the planning and design in addition to conventional communication networks and equipment, should fully consider the needs of emergency communications systems and
Configuration.
4.3.4 Newly built and rebuilt high-grade highways should synchronize the construction of communication pipes and make pipe network an important resource of highway communication network. highway
Communication network planning, design and construction should be for all levels of highway communication network interconnection to consider the necessary capacity reservation and routing extension.
5 networking technical requirements
5.1 Network structure and networking principles
5.1.1 Network structure
5.1.1.1 Highway communication network consists of highway trunk communication network, local communication network and access network.
5.1.1.2 Highway trunk communication network by relying on high-grade highway construction of inter-provincial long-distance communication network, the province long-distance communication network.
5.1.1.3 The local communication network is composed of the regional regional communication network or the road communication network.
5.1.1.4 The road communication access network is used to establish a communication connection between the service nodes and the user terminals at all levels.
5.1.2 networking principles
5.1.2.1 Road transport network transmission lines at all levels between the transmission lines should use optical fiber, the use of digital communication technology network; transmission nodes and
The transmission lines between the user terminals may use optical fibers or cables, using digital or analog signals.
5.1.2.2 There should be a tandem interface between the road communication network and the public network.
5.1.2.3 There should be a tandem interface between the road communication network and the water transport communication network.
5.1.3 Emergency communication system
5.1.3.1 Highway emergency communication system Relying on the national traffic emergency communication information platform construction, highway emergency communication facilities should be with the national traffic
Emergency communication information platform and network construction.
5.1.3.2 highway emergency communication system consists of highway emergency communication command platform and highway emergency communication mobile command platform, the use of stars
Mesh or mesh network.
5.1.3.3 between the road mobile emergency communication facilities and the road communication network, between the public communication network and the national emergency communication network
Create a business connection.
5.2 Optical fiber digital transmission system
5.2.1 General requirements
Optical fiber digital transmission system should be preferred to use synchronous digital system (SDH) network, small business capacity of the local network can also be used
Quasi - synchronous digital system (PDH) networking.
SDH transmission network should adopt the core layer, access layer hierarchical structure to build. By the core layer to build a communication network or secondary communication network
Trunk transmission system, relying on high-grade highway along the line between the inter-provincial trunk transmission system and the provincial trunk transmission system Ring network or grid
Structure, the reference configuration shown in Figure 1.
By the access layer SDH transmission network to build three-level communication network, the general sub-regional, according to the attribution of business construction, the use of ring network and
Tree structure.
S - an optical fiber point behind the optical connector of the optical transmitting terminal or repeater;
R - an optical fiber point in front of the optical connector of the light receiving terminal or repeater;
MPI --- main channel interface.
If a fiber distribution rack is used, additional optical connectors should be considered as part of the fiber optic line and between S and R.
Figure 1 Schematic diagram of the reference configuration of the trunk digital transmission system
5.2.2 SDH cable line
5.2.2.1 Working nominal wavelength and fiber requirements are as follows.
a) Working nominal wavelength. 1310 nm, using G. 652 fiber;
b) Working nominal wavelength. 1550nm, using G. 652, G. 653, G 655 fiber.
5.2.2.2 Light source types include.
a) Lasers. multi-longitudinal-mode lasers (MLM), single longitudinal-mode lasers (SLM);
b) light-emitting diodes.
5.2.3 bit rate
The SDH signal consists of one or more different steps of the Synchronous Transfer Module (STM-N) signal, where N is a positive integer. High order mode
The bit rate of the block (STM-N) signal is N times the signal rate of the base module STM-1. N in this standard only take positive integer 1,4,16,64.
The bit rate of the synchronous digital system is shown in Table 2.
Table 2 SDH signal bit rate
Synchronous transfer module bit rate/(kbit/s)
STM-1 155520
STM-4 622080
STM-16 2488320
STM-64 9953280
5.2.4 Transmission performance indicators
Long-distance trunk SDH digital transmission system error performance, jitter and drift performance should be consistent with YD/T 5095-2005 Chapter 8 of the
Requirements; local access layer SDH digital transmission system error performance, jitter and drift performance should be consistent with YD/T 5024-2005 Chapter 12
Claim.
5.2.5 network management system
Shall comply with the requirements of Chapter 4 of YD/T 5095-2005.
5.3 switching systems
5.3.1 Network structure
Highway communication network switching system in accordance with the three-tier exchange of network structure organization, the first and second long-distance switching network, the third level for the local exchange
network. Highway-level communication network set up one to two long-distance long-distance exchange center, highway two communication network by region to set up a two long-distance delivery
Change the center, highway three communications network set up in the local exchange.
The three-level communication network exchange and the secondary communication network exchange center should be established between the efficient direct route, the two communications network exchange
There should be an efficient and direct route between the heart and the primary communication network switching center and between the primary communication network switching center. Adjacent three-level communication network
For the exchange or the larger exchange between the exchange should be established between the highly efficient direct route, adjacent two communication network switching center or traffic volume of the two
An efficient direct route should be established between the switching centers.
The exchange centers or exchanges at all levels should access a common local telephone network and communicate with the public network in accordance with the common network
Transmission quality indicators, signal mode, numbering plan and other related technical standards and regulations; access to public network when the number of relay circuits should be based on the Department
The traffic volume of the design and the relevant call loss in the 10.0.6 provision of YD/T 5076-2005 are determined by calculation.
5.3.2 Signaling mode
Signaling at all levels of long distance exchange center and exchange office 7 signaling methods; exchange centers or exchanges at all levels and local public
The signaling between the telephone networks conforms to the relevant technical standards and regulations of the local telecommunication network signaling system.
5.3.3 Transmission of indicators
Shall comply with the requirements of Chapter 8 of YD/T 5076-2005.
5.4 Access network system
Shall comply with the requirements of Chapter 5 of YD/T 5139-2005.
5.5 Emergency telephone system
Should meet the requirements of JT/T 703.
5.6 digital synchronization network synchronization requirements
5.6.1 Synchronization mode
Road communication digital synchronous network using mixed synchronization mode, the network using master-slave synchronization, road communication network and public communication network synchronization
The quasi-synchronous mode, its timing requirements should be consistent with ITU-TG. 811.
5.6.2 Classification of Highway Communication Synchronization Network
The digital communication network is divided into three levels, namely, level 1 node, level 2 node and level 3 node. The hierarchical structure shown in Figure 2.
Figure 2 digital synchronous network hierarchical structure
5.6.3 Node clock level
Highway communication digital synchronization network classification, the node clock level can be divided into. 1 level reference clock; 2 node clock and 3 nodes
clock.
5.6.4 Clock setting
Synchronous network level 1 node with a level of reference clock, 2 nodes using 2 node clock, 3 nodes using 3 node clock. Time
Clock settings and the relationship with the synchronization network classification and clock level in Table 3.
Table 3 Synchronization network classification and clock settings
Synchronize the network to level the clock level to set the position
Level 1 Level 1 Reference Clock Level 1 or Level 2 Communication Network Center
Level 2 Level 2 Node Clock Secondary or Level 3 Communication Network Center
Level 3 Level 3 Node Clock Level 3 Communication Network Center
5.6.5 Synchronous network interface and its basic requirements
Shall comply with the requirements of 3.6 in YD/T 5089-2005.
5.6.6 Performance indicators
Shall comply with the requirements of Appendix A of YD/T 5089-2005.
5.6.7 Synchronous links
5.6.7.1 The synchronization link in the network shall have a primary synchronization link and at least one standby synchronization link.
5.6.7.2 Synchronization information is preferentially transmitted through SDH transmission system, can also be transmitted through PDH system, or use dedicated line, telephone communication
Traffic transmission between stations.
5.6.7.3 Synchronous reference transmission conforms to the requirements of 3.4 of YD/T 5089-2005.
5.6.8 clock reliability
5.6.8.1 The cumulative downtime of the equipment shall not exceed 1 min per year, and the equipment shall be able to provide the timing signal continuously and steadily,
Functions such as timing input, clock function and timing output function should be redundant configuration, the device board can be charged during operation.
5.6.8.2 When the primary clock of the primary reference clock fails, it should be automatically switched to the standby reference clock immediately.
5.6.8.3 When the reference clock is not received, the 2-level node clock and the 3-node clock should be automatically transferred to the active state.
5.7 interface
5.7.1 Electrical interface parameters
The following digital signal bit rate electrical interface parameters should be consistent with the provisions of GB/T 7611-2001.
a) 64 kbit/s interface (E0);
b) 2048kbit/s interface (E12), with 2048kbit/s interface basic frame characteristics, and its basic frame format derived
× 64kbit/s (2 < ≤ ≤) interface;
c) 8448 kbit/s interface (E22) with 8448 kbit/s basic frame characteristics;
d) 34368 kbit/s interface (E31);
e) 139264 kbit/s interface (E4);
f) 155520 kbit/sSTM-1e interface (ES1).
5.7.2 Optical interface parameters
The parameters of the STM-1, STM-4, STM-16 and STM-64 optical interfaces shall comply with Table B in YD/T 5095-2005. 1 ~ Table B. 9
The request.
5.7.3 Optical interface classification
5.7.3.1 According to the different applications, highway communication system optical interface is divided into two categories.
a) short distance communication optical interface;
b) Long distance communication optical interface.
5.7.3.2 Short-range communication Optical interface application classification code is shown in Table 4.
Table 4 Short-range communication Optical interface application classification code
Synchronous transfer module optical interface code
Working wavelength /
nm
Use fiber type
STM-1
S-1.1 1310 G. 652
S-1.2 1550 G. 652
STM-4
S-4.1 1310 G. 652
S-4.2 1550 G. 652
STM-16
S-16.1 1310 G. 652
S-16.2 1550 G. 652
STM-64
S-64.1 1310 G. 652
S-64.2 1550 G. 652
S-64.3 1550 G. 653
S-64.5 1550 G. 655
5.7.3.3 Long-distance communication Optical interface application classification code is shown in Table 5.
Table 5 Long-distance communication Optical interface application classification code
Synchronous transfer module optical interface code
Working wavelength /
nm
Use fiber type
STM-1
L-1.1 1310 G. 652
L-1.2 1550 G. 652
L-1.3 1550 G. 653
STM-4
L-4.1 1310 G. 652
L-4.2 1550 G. 652
L-4.3 1550 G. 653
Table 5 (continued)
Synchronous transfer module optical interface code
Working wavelength /
nm
Use fiber type
STM-16
L-16.1 1310 G. 652
L-16.2 1550 G. 652
L-16.3 1550 G. 653
STM-64
L-64.1 1310 G. 652
L-64.2 1550 G. 652
L-64.3 1550 G. 653
5.7.4 Ethernet interface
Shall comply with the requirements of Chapter 5 of YD/T 1099-2005.
5.7.5 audio interface
5.7.5.1 Bandwidth. 300Hz ~ 3400Hz.
5.7.5.2 Input and output impedance. 600Ω.
5.7.5.3 The switching power level is shown in Table 6.
Table 6 audio interface transfer power level
Project second line four lines
Input/dBr 0 -14
Output/dBr -2 +4
Impedance/Ω 600 600
5.7.6 Interchange Device Interface
Shall comply with the requirements of Chapter 10 of YDN065-1997.
5.7.7 Access Network Interface
Shall comply with the requirements of Chapter 4 of YDN061-1997.
5.8 Communication pipes
Communication pipe technical requirements should be consistent with the provisions of YD5007.
Provincial high-grade highway at the provincial boundary should be inter-provincial highway communication network at least a hole within the diameter of 90mm or two hole diameter
32mm above the tube hole capacity. The pre-construction of the communication pipeline should be extended to the provincial boundary and set aside the staff hole, the late construction of the communication pipe
Into the person's hand hole.
5.9 Emergency communication facilities
Highway emergency communication facilities can provide four kinds of communicatio...
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