Research on LTE-R handover algorithm based on improved grey-Markov model

doi:10.11835/j.issn.1000.582X.2023.07.005

Home > Archive>Volume 46, Issue 7, 2023 >44-52. DOI:10.11835/j.issn.1000.582X.2023.07.005

Research on LTE-R handover algorithm based on improved grey-Markov model
DOI:
                        10.11835/j.issn.1000.582X.2023.07.005
                    
CSTR:
                        [cstr]
                    
Author:
                        WANG RuifengWANG Ruifeng
School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
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FAN WenjingFAN Wenjing
School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
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Affiliation:School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
Clc Number:U285.2
Fund Project:Supported by National Natural Science Foundation of China （61661027）.

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Abstract:

During the handover process of high-speed trains, the reference signal receiving power (RSRP) experiences fluctuations caused by path loss and terrain, leading to issues with the traditional A3 event-based handover decision method, such as ping-pong occurrences and a decrease in handover success rate. To address this problem, a handover algorithm based on an improved gray-Markov model is proposed. This algorithm processes and predicts the received power of the reference signal using an enhanced grey-Markov model. The handover process then utilizes the prediction results as the basis for the handover decision based on the preloading method. Simulation results demonstrate that the improved handover algorithm significantly reduces the fluctuation of RSRP values received by the train, lowers the probability of ping-pong handovers, and effectively improves the handover success rate.

Key words:high speed railway;LTE-R;train communication system;handover;Grey-Markov;ping-pong handovers

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王瑞峰,范文静.基于改进灰色-马尔可夫模型的LTE-R越区切换算法[J].重庆大学学报,2023,46(7):44~52

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Received:April 12,2022
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Online: August 02,2023
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