铁路信号系统无线网络数据转发问题分析

Jahnavi Katragadda, Mubeena Shaik, Seetha Ramanjaneyulu B
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摘要

由于有线信令系统所面临的困难,基于无线通信的信令系统在全球范围内正变得越来越重要。虽然 GSM-R 和 LTE-R 等基于蜂窝通信的系统在大多数情况下都被提出,但基于 adhoc 网络和无线传感器网络的非蜂窝通信系统也变得同样重要。在后一种情况下,需要使用 AODV 等路由协议,在无法直接从源网络到达目的地时转发数据包。在这种情况下,如果对这些协议进行一些改进,使其更适合这些环境,将有助于提高其性能。本研究通过对铁路信号应用的模型网络进行仿真研究,对这些方面进行了研究和分析。结果表明,利用 GPS 和保留备用路线可以大大提高性能。仿真使用了带有 INET 框架的 Omnet++ 仿真器。
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Analysis Of Data Forwarding Issues In Wireless Networks Aimed For Railway Signaling Systems
Due to the difficulties faced with wire-based signaling systems, wireless communication based signaling systems are gaining importance worldwide. While the cellular communication based systems like GSM-R and LTE-R were proposed in majority of the cases, the non-cellular communication systems that are based on adhoc networks and wireless sensor networks have also become equally important. In this later case, routing protocols like AODV are needed to forward the data packets when destination is not reachable directly from the source. In this context, if some improvements are made to these protocols to make it more suitable to these environments, it can help to have better performance. These aspects are studied and analyzed in this work by carrying out the simulation studies for the model network considered for railway signaling application. Results suggest that making use of GPS and keeping the alternate route on hand can improve the performance considerably. Omnet++ simulator with INET framework is used to carry out the simulations.
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