With the rapid development of high-speed railway, the railway mobile communication system has more demands on the handover delay and handover success rate. This paper proposes an advance trigger handover algorithm based on the speed in LTE-R. It is designed to suppress communication interruption and dropped calls caused by that the signaling interaction and setting pre-bearer switching point get rise to handover too early or too late. The theoretical analysis is established in the signaling flow chart, and it is shown that the advance handover algorithm can shorten the handoff latency, which TDD frame structure type two has the most significant time effect. Finally, the simulation shows that compared with the conventional handover algorithm, the advance handover algorithm has a higher and more stable handover success rate. It provides a technical support for the future railway private network applications to LTE-R.
米根锁,马硕梅. 基于速度触发的提前切换算法在LTE-R中的应用研究[J]. 电子与信息学报, 2015, 37(12): 2852-2857.
Mi Gen-suo, Ma Shuo-mei. Advance Trigger Handover Algorithm Based on the Speed in LTE-R. JEIT, 2015, 37(12): 2852-2857.
Pang Meng-meng. Effect of GSM-R handover on CTCS-3 and model analysis in high-speed railway environment[D]. [Master dissertation], Beijing Jiao Tong University, 2010.
Cao Yuan, Ma Lian-chuan, and Zhang Yu-zhuo. Comparison of handover success between rates between LTE-R and GSM-R[J]. China Railway Science, 2013, 34(6): 117-122.
He Zhen-zhen. The research on handover technology under high-speed mobile communication system based on LTE-R[D]. [Master dissertation], Central South University, 2013.
Wu Duan-po, Jin Xin-yu, and Jiang Lu-rong. Dropped-call probability in high speed railway environment[J]. Journal of Zhejiang University (Engineering Science), 2015, 49(4): 705-710.
Zhu Xiao-rong, Luo Xiao-qin, and Zhu Hong-bo. Adaptive res-ource allocation scheduling algorithm for multi-service applica- tion in OFDMA system[J]. Journal of Electronics & Information Technology, 2015, 37(6): 1298-1303.
Liu Qin, Li Hong-xia, and Li Zhao. Dynamic spectrum alloc- ation for LTE systerm by Exploiting cognitive capability[J]. Journal of Electronics & Information Technology, 2015, 37(1): 175-181.
Huang Miao-na, Feng Sui-li, and Chen Jun. Dynamic load balancing scheme for multi-objective optimization in LTE networks[J]. Journal of Electronics & Information Technology, 2014, 36(9): 2152-2157.
[8]
Piro G and Boggia G. Two-level downlink scheduling for real- time multimedia services in LTE networks[J]. IEEE Transactions on Multimedia, 2011, 13(5): 1052-1065.
[9]
Capozzi F and Grieco L A. Downlink packet scheduling in LTE cellular networks: key design issues and a survey[J]. IEEE Communications Surveys & Tutorials, 2013, 17(2): 678-700.
[10]
赵治. LTE系统原理及应用[M]. 北京: 电子工业出版社, 2012: 57-194.
Zhao Zhi. The Principle and Application of LTE System[M]. Beijing: Publishing House of Electronics Industry, 2012: 57-194.
Meng Fan-li, Zhang Xin-cheng, and Hu Heng-jie. LTE system time delay analysis[J]. Design Technology of Posts and Telecommunications, 2009, 24(3): 37-41.
Wu Hao, Gu Yong-hao, and Zhong Zhang-dui. Research on the fast algorithm for GSM-R switching for high-speed railway[J]. Journal of Railway Enginering Society, 2009, 37(1): 92-96.
Di Cheng, Fang Xu-ming, and Yang Chong-zhe. On-board dual-antenna seamless handover scheme in GSM-R redundant network[J]. Journal of the China Railway Society, 2012, 34(6): 51-56.
[14]
原燕斌. 高速铁路环境下LTE切换技术的研究[D]. [硕士论文],北京邮电大学, 2012.
Yuan Yan-bin. Research on high-speed railway environment LTE handover technology[D]. [Master dissertation], Beijing University of Posts and Telecommunications, 2012.
Luan Lin-lin. Research on designing and optimization of signaling of TD-LTE based in high-speed handover[D]. [Ph.D. dissertation], Beijing University of Posts and Telecommunications, 2012.
