Beamforming and positioning-assisted handover scheme for long-term evolution system in high-speed railway

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Beamforming and positioning-assisted handover scheme for long-term evolution system in high-speed railway

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Published

As the railway industry expands and trains speed-up, the reliability and efficiency of wireless communication systems in high-speed railway have to face the severe challenges. The high-speed brings about more severe Doppler effect, the postponement of handover triggering location and more frequent handover. Therefore the influence caused by the high-speed decreases the reliability of wireless communication network. In this study, considering the decision of ‘global system for mobile communication for railway’ evolution to long-term evolution for railway (LTE-R) by International Union of Railways, a scheme based on the beamforming and positioning information is proposed to improve the system handover performance for the LTE system which is being applied to the high-speed railway. In the overlapping region, both the current serving eNodeB and the target eNodeB start to use beamforming with different gain factors to improve handover success probability. The results have shown that the proposed scheme increases the handover success probability effectively.

Inspec keywords: Long Term Evolution; radionavigation; cellular radio; Doppler effect; probability; telecommunication network reliability; array signal processing; mobility management (mobile radio); railway communication

Other keywords: Doppler effect; LTE-R system; eNodeB; wireless communication systems; Long-Term Evolution system; handover success probability; beamforming; railway industry; high-speed railway; positioning-assisted handover scheme; wireless communication network reliability; global system for mobile communication for railway evolution; system handover performance

Subjects: Signal processing and detection; Reliability; Mobile radio systems; Other topics in statistics; Network management; Radionavigation and direction finding

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