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Radio-over-fiber (RoF) technology can improve reliability and quality of service (QoS) of railway communication systems effectively. This paper studies directional antenna radiating same direction and intercross base station redundant network these two coverage strategies of RoF in long heavy haul railway tunnels (more than 1 km). As RAUs (remote antenna unit) deployed in long tunnels, according to...
Radio-over-fiber (RoF) technology is a comparatively mature technology which can effectively improve the reliability and quality of service (QoS) in railway communication systems. As a coverage strategy of RoF in long heavy haul railway tunnels (more than 1 km), directional antenna radiating same direction is highly valued. Due to the handover mechanism changed, handover trigger probability and outage...
Radio-over-fiber (RoF) technology can effectively improve reliability and quality of service (QoS) of railway communication systems. This paper studies the coverage efficiency of ROF in heavy haul railway. Coverage efficiency is determined by calculating the area power consumption of cell according to combined path loss and shadowing model. The value of the length of remote antenna unit (RAU) cells...
In this paper, we propose a novel GSM-R (GSM for Railway) train control system and method for real-time transmission of data. It includes distributed antenna array, BTS(Base Transceiver Station) in the network side and train locomotive terminal; Distributed antenna array set up along the railway, providing the same fixed frequency signal for the train locomotive terminal in order to make data transmission...
GSM-R (GSM for Railway) network is a professional cellular network which is used for railway transportation. Unlike mobiles with low speed in regular GSM network, in GSM-R network the signals received by mobiles on high speed trains may suffer severe Doppler shift and other interferences. In this paper, a novel handover scheme based on train index in GSM-R network is proposed. This method makes use...
We propose a group location management scheme used for passenger dedicated lines, in which mobile users with same moving trend are combined as a group. In the scheme, each group is identified by a group ID Gi, and implements unified location management process though a group proxy deployed on the train. Thus in the network side, instead of modifying each user's location information separately, the...
Chinese train control system level 3 (in short, CTCS3) is extremely complicated, and must be reliable and safe. Therefore, its design and development need to be validated by simulation. Particularly, we need to guarantee the reliability of the hardware-in-the-loop simulation (in short, HILS) system via verification and validation (V&V) during the modeling and simulation (M&S) for each sub-system...
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