System and method for radio-based information interchange between track-side devices and vehicles moving along a track section

Abstract

The invention relates to a system and a method for radio-based information interchange between track-side devices (6) and vehicles (1, 2) moving along a track section, in particular of a railway system, having a radio network which is formed from radio cells and via which the track-side devices (6) which are fixed on the track section exchange information with vehicle-side devices (4a) which are arranged in the vehicles (1, 2), with the radio range of a device (6) in each case defining the radio cell of this device (6), and with the radio cells of in each case two devices (6) which are arranged immediately alongside one another overlapping one another, and with the radio cells which are arranged one behind the other being switched as they are passed through, in that, in the overlap area (A, B) of two track-side devices (6), a radio link to the track-side device (6) of the immediately subsequent radio cell is additionally set up by the vehicle-side device (4a). In order to ensure that the changeover from one radio cell to the next takes place without any interruption and as far as possible without any restrictions, in particular even when the bandwidth margins are small, it is proposed that the location (18, 19, 22) for changing the radio cell is defined on the basis of local transmission qualities determined when this track section is passed through, in particular by vehicles (1, 2) travelling in front.

Description

technical field [0001] The invention relates to a system and a method according to the preambles of claims 1 and 10 for the radio-based exchange of information between roadside devices and vehicles moving along a travel route, in particular vehicles of a rail system. Background technique [0002] It is known to exchange information between stationary installations and vehicles of a rail system by means of radio transmission. In this case, the radio network for data exchange consists of radio blocks which are defined by the radio range of the permanently installed devices. In order to ensure the transition from one radio block to the immediately adjacent next radio block, the fixed device distance is chosen such that the directly adjacent radio blocks overlap. For continuous data exchange, the vehicles of the rail system must each switch radio blocks, that is to say switch over the radio communication with one device to the immediately following device. This takes place in ...

AI Technical Summary

Problems solved by technology

[0003] A disadvantage of this known system is that the transmission quality of the radio communication along the route may experience strong fluctuations from place to place and from time to time, so that radio interruptions may occur in transitions from one radio block to another

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