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GB/T 7262-2025 English PDF

GB/T 7262: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 7262-2025RFQ ASK 3 days Technical requirement and equipment arrangement for highway communication Valid
GB/T 7262-2009299 Add to Cart 3 days Technical requirements and equipment arrangement for highway communication Valid
GB/T 7262.1-1993199 Add to Cart 2 days Technical requirements and arrangement of equipmentfor highway communcation Obsolete


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Older Standard (superseded by this standard): GB/T 7262-2009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......
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