2 Stefano Agosta CERN IT/Communication Systems High-Speed Mobile Communications in Hostile Environments CHEP 2015 Okinawa 14/04/2015 High-Speed Mobile.

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Presentation transcript:

2 Stefano Agosta CERN IT/Communication Systems High-Speed Mobile Communications in Hostile Environments CHEP 2015 Okinawa 14/04/2015 High-Speed Mobile Communications in Hostile Environments

Introduction Increasing demand for indoor wireless networks 14/04/ High-Speed Mobile Communications in Hostile Environments Offices Meeting points Homes Hostile environments CERN underground Trains

CERN needs 14/04/2015 High-Speed Mobile Communications in Hostile Environments 4 Target Gas release risk Strict access constraints Ionizing radiations

CERN needs Voice and data for : 14/04/2015 High-Speed Mobile Communications in Hostile Environments 5 Services Standard machines operation Remote experts consultancy Train Inspection Monorail (Radio Protection surveys) Temperature and humidity sensors

WiFi technology 14/04/2015 High-Speed Mobile Communications in Hostile Environments ac wave 2 offers 3.5 Gbps Access Points (AP) cover small areas (few meters) Widely deployed in residential and office areas

Adopted for offices Not suitable in the underground Ionizing radiations Tunnel lengths (27 Km for LHC, 7 Km for SPS) Temporary VDSL during LongShutdown1 10 Mbps, 275 APs in LHC tunnel 14/04/2015 High-Speed Mobile Communications in Hostile Environments 7

LTE technology 100% IP network High spectral efficiency MIMO (reliability and/or throughput enhancement) Round Trip Time <10 ms 1 Gbps download, 500 Mbps upload 14/04/2015 High-Speed Mobile Communications in Hostile Environments 8

CERN tunnels mobile infrastructure 14/04/2015 High-Speed Mobile Communications in Hostile Environments 9 Target: tunnels + LHC caverns Services: GSM, UMTS, TETRA, TETRAPOL Antenna cable resistant to radiations

14/04/2015 High-Speed Mobile Communications in Hostile Environments 10 CERN tunnels mobile infrastructure Inter-technology compatibility Passive Radio Frequency network optimized for bands: 400 MHz 800 MHz 900 MHz

14/04/2015 High-Speed Mobile Communications in Hostile Environments 11 Mobile operator base station Master Unit Remote Units Mobile operator eNodeB GSM + UMTS LTE Remote Units CERN tunnels mobile infrastructure LHC repeating system

Measurements 14/04/2015 High-Speed Mobile Communications in Hostile Environments Mbps download, 15 Mbps upload LHC8 >100 Mbps download, >50 Mbps upload LHCb cavern Limited by measurements tools

Conclusions 14/04/2015 High-Speed Mobile Communications in Hostile Environments 13 Voice + data services needs in CERN underground WiFi: good performance, problematic feasibility LTE: high throughputs in tunnels + caverns RF infrastructure upgrade for inter-technology compatibility

Questions? 14/04/2015 High-Speed Mobile Communications in Hostile Environments 14 Thank you!