Risk assessment GSM-R blocking to support the coordination process in the Netherlands Loek Colussi June 30, 2014

Coordination agreement technical committee: UMTS/LTE900 will increase probability of blocking/intemodulation agreement between MNOs, GSM-R operator and regulator interim solution  sustainable solution mid 2015 no legal basis, appeal on social engagement single points of contact valid until July 1st 2015 June 30, 2014

Coordination process Before site activation information to regulator >1 week prior to activation base stations within 500 m from railway track probability of blocking  software tool/modeling & field measurements impact analysis  ‘severity map’ from GSM-R operator After site activation active monitoring by GSM-R operator report interference to MNO and regulator severe disturbance  switch off site/sector within 4 hours moderate disturbance  mitigation June 30, 2014

Pre-activation coordination process June 30, 2014

Post-activation interference management June 30, 2014

Risk of blocking/intermodulation Risk = Probability x Impact Probability of blocking determined by: simulations with coordination tool, translated to geografic picture measurements from railway detailed inspection feedback from field Impact of blocking determined by : annoyance/danger to be predicted location (station, shunt, port) expected train speed application of ERTMS June 30, 2014

Coordination tool ‘proportional method’ all block of MNO filled with UMTS GSM-R on highest channel (924.8 MHz) single MNO basestation (Tier 0) rural & suburban HATA propagation model fixed distance between GSM-R basestations good & bad radios with & without filters Tx power of MNO June 30, 2014

Model GSM-R radio June 30, 2014

Simulations with coordination tool rural suburban June 30, 2014

Translation to geografic picture for each 100 m railway bin: what is the distance to the nearest MNO basestation? what is the distance to the nearest GSM-R basestation? is the protection distance jeopardized? June 30, 2014

Geotool GSM-R: all basestations MNO: < 500 m from track analysis resolution: 100 m = GSM-R = KPN = T-Mobile = Vodafone = blocking June 30, 2014

June 30, 2014

Measurements June 30, 2014

Risk assessment Low risk: small chance of blocking according to simulation and measurement outside area of potential risk expected range of disturbance short special railway provisions High risk: large chance of blocking according to simulation or measurement inside area of potential risk expected range of disturbance large cumulation of signals June 30, 2014

Example: high risk June 30, 2014

Example: low risk June 30, 2014

Example: high or low risk? June 30, 2014