Clear Cincom telecom Projects - 2017
Audit Nominal Cell Plan GSM-R in Northern Netherlands
Clear CinCom has performed an audit of the GSM-R Nominal Cell Plan (NCP) for the northern part of the Netherlands stretching a network section of about 600km. The audit was performed for the Dutch railway infrastructure operator ProRail whereby Clear CinCom was asked to assess the design as independent and neutral engineering entity. The NCP was produced by a subcontractor of ProRail. Clear CinCom used a prediction model for forecasting the path loss between the GSM-R transmitter and receiver based on a variety of metrics and conditions with the objective the validate the design of each GSM-R site as part of the NCP. Path loss could be predicted with a very high level of accuracy, thanks to the integration of the CrossWave prediction model (which was developed by Orange Labs and recently acquired by Clear CinCom) with the Atoll planning tool by Forsk. To further improve the quality of the audit, open-source Digital Terrain Model (DTM) and Morphology data, with an original resolution up to 50cm, as provided by the Dutch government was used. The company Object Vision, under the direction of Clear CinCom, prepared a number of scripts and algorithms that converted the open source geo-data into DTM, Morphology and 3D vector data for use with the CrossWave prediction model as part of the Atoll RF planning tool. Based on previously acquired continuous wave measurement data, the CrossWave prediction model was optimized to match with the local land use conditions. The radio network planners at Clear CinCom have specific attention for using the correct antenna pattern and settings to minimize the far-field pollution. Based on the performance of the live network (since 2003), changes were advised to improve the design such that it would be more robust for future expansion and operation.
Static PLMN interference measurements
One problem faced by railway operators is interference by commercial telecom operators, also called PLMN interference. At the request of Dutch railway operator ProRail, Clear CinCom conducted a number of static interference measurements on stations and along railway lines. This effectively meant installing a small mast and recording performance for a specific location, whereby we identify, characterize and report on possible sources of interference. Our reports are used by ProRail to negotiate with the public operators in order to mitigate the interference and ensure a correct functioning of the GSM-R network throughout the country. This is an ongoing project, where Clear CinCom steps in on an as-needed basis.
Subset093 EoG Packet Switched performance measurements
Clear CinCom has supported Dutch GSM-R railway operator ProRail collecting EoG (ETCS over [E]GPRS) packet switched performance data with the objective to verify the KPI targets as specified in the draft Subset093 document. The measurements were conducted in accordance with the draft O-2475 packet switched test specification in a GSM-R network supporting both GPRS and EDGE. For this assignment Clear CinCom has developed a bespoke RF QoS measurement application, consisting of a mobile client for the train born side and a fixed server as a land-side unit. The two entities measured the following packet switched KPIs as detailed in the draft Subset093 and O-2475 specifications: PS mode service setup (PS-SS), Network Registration Delay (NRD), Attach Delay (GPRS-AD), PDP Context Activation Delay (PDP-CAD), Transaction Transfer Delay (TTD) and ETCS DNS Look-up Delay (ETCS-DLD).
Weak Spot Analysis of radio access network
Clear CinCom has been a partner of the Dutch railway operator ProRail for many years. In this project, our assignment was to identify weak spots in the radio access network in Northern region of The Netherlands. ProRail wanted an independent verification of their network performance against new set of specifications and wanted to map areas where a need for network improvement was required.