摘要
研究目的:随着我国高速铁路和客运专线建设,GSM-R数字移动通信系统在我国铁路得到迅速发展,同时也带来一些亟待解决的问题。GSM-R的线状覆盖方式,使列车运行过程中越区切换频繁发生,切换性能对系统的服务质量和行车安全有很大的影响,尤其是高速列车对GSM-R系统越区切换提出更加严格的要求。为在高速环境下实现快速可靠切换,针对切换算法进行研究,提出一种快速切换算法,达到缩短切换时延,提高高速环境下跨MSC间越区切换的成功率的目标。研究结论:通过研究提出了一种适用于高速铁路环境下的新型快速切换算法。在理论上对该算法的实现方式和性能进行了分析,并与常规的切换算法在切换时延上进行了比较。结果表明本算法在缩短切换时延上具有一定的优势,特别在跨MSC切换时能减少约64%的时延。采用快速切换算法非常适用于高速环境,通过缩短切换时间,从而提高切换成功率,为移动通信系统提供更高的可靠性和有效性。
Research purposes ： With the development of high - speed railway and passenger - dedicated railway, GSM - R digital mobile communication system is developing fast in China. Meanwhile it brings some problems to be solved urgently because of the linear coverage plan of GSM - R, requiring frequent switching for the running train. The performance of switching has very much effect on system service quality and train running safety because high - speed train requires high standard for GSM - R switching. The research is done on the switching algorithms for the purpose of seeking one fast algorithm to shorten switching delay time, realize the fast and reliable switching and enhance the successful switching ratio of GSM - R during transferring MSC section under condition of high speed.
Research conclusions：A new type of fast algorithm for GSM - R switching for high - speed railway is present through research, and the analyses of the feasibility and feature of this algorithm are made in theory. In addition, compared with the normal switching algorithm, the new algorithm is better in shortening switching delay time, especially the switching delay time can be reduced by 64% during transferring MSC section. This fast algorithm is very appropriate for high - speed railway.
出处
《铁道工程学报》
EI
北大核心
2009年第1期92-96,共5页
Journal of Railway Engineering Society
基金
轨道交通控制与安全国家重点实验室(北京交通大学)开放课题基金资助(SKL2008K007)
