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ETSI - TR 101 538

Electromagnetic compatibility and Radio spectrum Matters (ERM); Short Range Devices (SRD); UWB location tracking devices in the railroad environment

active, Most Current
Organization: ETSI
Publication Date: 1 October 2012
Status: active
Page Count: 34
scope:

The present document describes a railway application utilizing ultra wideband technology operating in the preferred frequency ranges from 3,1 GHz to 4,8 GHz and from 6 GHz to 8,5 GHz. Operation is foreseen for indoor and outdoor applications, including either mobile devices installed onboard the train cars and fixed devices installed on ground, as reference stations. These stations, belonging to the fixed infrastructure, will be allowed to operate as UWB emitters only in the lower frequency band, from 3,1 GHz to 4,8 GHz, in compliance with the compatibility studies and with the latest recommendation [i.9] proposed by ECC/CEPT, as this provision would allow the deployment of such fixed UWB devices in the railway environment according to the "registration and coordination" process recently proposed by ECC/CEPT 167 [i.10].

In railway applications, location tracking is performed within specified areas, called as an Area-Of-Interests (AOIs), which are areas around Point-Of-Interests (POIs). The POIs are listed below:

• Point in passenger platform

• Railway signal

• Railway crossing

• Generic POI

The UWB radio technology is required to track with sub-meter accuracy any rail vehicle to the purpose of stopping it in the appropriate POI. The length of AOI is defined by the braking distance of a rail vehicle, and it is typically hundreds of meters.

The generic regulation on UWB technology for use in rail and road vehicles onboard applications, such as - for instance - in subway underground stations, within the frequency ranges of 3,1 GHz to 4,8 GHz and 6 GHz to 8,5 GHz has been recently updated in the last Electronic Communication Committee (ECC) amended ECC/DEC(06)04 [i.1] including the suitable reference to mitigation techniques. According to [i.2], underground station should be considered as an indoor environment because surrounding structures shields any emitted radio signal, providing the necessary attenuation to protect primary radio communication services against harmful interference.

However, in railway stations and trackside signalling installations there may not be structures blocking the propagation of emitted signals, and therefore the outdoor environment regulation should apply. The outdoor usage of UWB devices in location and tracking applications such as person and object tracking in industrial, automotive and transportation environments are described in [i.4] and [i.5]. Nevertheless, these applications do not include the location / tracking specific application in railway environments, which may occur at many points across a public rail or tram network. Actually, the latest generic ECC regulation [i.11] for the deployment of UWB devices in vehicles and the ECC/REC(11)09 [i.9] on provisions relevant to fixed UWB infrastructures do not deal with specific railway application issues, but are actually permitting the deployment of such UWB, respectively, onboard the trains and along the wayside of railway infrastructures. Therefore, the present document describes the railway application of UWB devices and collects specific information, including:

• Market information (annex A).

• Technical information (annex B).

Document History

TR 101 538
October 1, 2012
Electromagnetic compatibility and Radio spectrum Matters (ERM); Short Range Devices (SRD); UWB location tracking devices in the railroad environment
The present document describes a railway application utilizing ultra wideband technology operating in the preferred frequency ranges from 3,1 GHz to 4,8 GHz and from 6 GHz to 8,5 GHz. Operation is...

References

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