GB/T 20999-2017Data communication protocol between traffic signal controller and control center (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 20999-2007 "Data Communication Protocol between Traffic Signal Controller and Host Computer". Compared with GB/T 20999-2007, the main technical changes except editorial changes are as follows.

--- Added terms such as phase green interval time, phase phase, phase phase transition constraints, and phase phase chain;

--- Removed the term output channel and the empty interval;

--- Modify the contents of the coordination control for the central coordination control and local coordination control;

--- Appendix A, Appendix B, and Appendix C specify the communication procedures, state constants, data tables, and data fields;

--- Added Appendix D for illustration.

1 Scope

This standard specifies the structure of the data communication protocol between the traffic signal controller and the host computer, the physical layer, the data link layer, and the network layer. Application layer requirements.

This standard is applicable to the data communication between the signal generator and the host computer in the traffic signal control system.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 15126-2008 Information Technology Open System Interconnection Network Service Definition

GB/T 17547-1998 Information technology open system interconnection data link service definition

RFC0768 UDP Protocol (Userdatagramprotocol)

RFC0791 IP Protocol (Internet protocol)

RFC0793 TCP Protocol (Transmissioncontrolprotocol)

IEEE802.2/3.1985 LAN Protocol Standard (EthernetLAN Protocol)

3 Terms and Definitions

The following terms and definitions apply to this document.