QoS Strategies for Wired Communication Networks in Urban Rail Transit Signaling System
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 11
Abstract
Objective With the increase in data traffic and diversification of data types in urban rail transit signaling systems, higher demands are placed on reliability, real-time performance, and security. It is necessary to thoroughly investigate QoS (quality of service) strategies for wired communication networks in signaling system. Method Based on the actual data from signaling systems and the architecture of wired communication networks, an analysis is conducted on the service requirements of ATP (automatic train protection) and ATS (automatic train supervision) subsystem backbone networks in the signaling system, from perspectives of network bandwidth, bandwidth requirements of each service, and involved data terminals. Considering the transmission capacity, data processing efficiency, and fault tolerance of wired communication networks, an optimized QoS implementation strategy for the signaling system is proposed and tested to validate its effectiveness. Result & Conclusion The QoS strategy employs RSVP (resource reservation protocol) to reserve resources before establishing communication sessions, and configures appropriate DSCP (differentiated services code point) parameters to ensure controllable bandwidth usage for each service terminal. Priority processing of services on the backbone network switches is based on the IEEE 802.1p protocol. Simulation test results show that the QoS strategy effectively limits the traffic of individual terminals under extreme traffic conditions, preventing application unavailability caused by single terminal failure. This significantly improves the quality and performance of the signaling system, ensuring the safe and efficient operation of urban rail transit signaling systems.
Authors and Affiliations
Yongshun XU
Keywords
Related Articles
- EP ID EP751185
- DOI 10.16037/j.1007-869x.2024.11.012
- Views 54
- Downloads 0
Deformation and Dynamic Response Analysis of Metro Shield Tunnel Under-Crossing Existing Railway Frame Bridge
［Objective］ At present, there are few studies on the interaction between the under-crossing shield and the upper vehicle-track structure. In order to ensure the safety of new metro shield construction and existing line...
Design of Operation Inspection Garage Clearance Height for Metro Vehicle Bases with Overhead Property Development
Objective The development of overhead property in urban rail transit vehicle bases becomes a basic requirement for vehicle base design in many cities such as Shanghai and Beijing. To effectively address the impact of ove...
Optical Power Prediction Method Based on Double Pooling Multilayer Perception
Objective In response to the situation where historical optical power data in metro communication systems is missing despite the sufficient historical related data, an optical power prediction method based on double pool...
Deep Energy-saving and Consumption Reduction Strategies for Urban Rail Transit
Objective With the increase in urban rail transit operational lines and operating hours, electrical energy consumption rises annually. To reduce energy consumption and operational costs, it is essential to conduct in-dep...
Automatic Protection Scheme Analysis for Fully Automatic Operation Line Section Evacuation
Objective There are no train crew on the train that runs on the fully automatic operation (FAO) line of urban rail transit, leading to very big safety risks in the evacuation scenario. Therefore, it is necessary to study...