Impact on GSM-R of nationwide introduction of ETCS

1. Impact on GSM-R of nationwide introduction of ETCS Dirk Taeleman Program manager 03.04.2014

2. 1. Short introduction ETCS L2: a challenging project, 1/3 of the network by 2022 Impact on GSM-R of nationwide introduction of ETCS

3. 2. Voice VS data Radio coverage: ETCS requires critical real time interactive data transfer – if the GSM-R network is not available at the right time, the train will stop. Radio capacity: in “circuit switched based” data transfer, each train requires a timeslot in the radio network.The required capacity for ETCS is a multiple than for voice. Impact on GSM-R of nationwide introduction of ETCS

4. 3. Radio coverage (I) Initial state: Actual network • Application : Voice - 8W cab radios • Coverage criteria : -95 dBmat 95% at 4m height New Coverage criteria : • min. -85 dBmat 95% at 4m height Impact on GSM-R of nationwide introduction of ETCS

5. 3. Radio coverage (II) New Coverage criteria : • min. -85 dBm at 95% at 4m height Comes from the individual criteria from various applications on the GSM-R network: • ETCS L2 at 4m • Coverage for maintenance teams along the tracks at 1.5m • In-Train coverage for new train departure procedures Impact on GSM-R of nationwide introduction of ETCS 5

6. 4. Improve radio quality in a live network (I) • EVALUATION OF NEEDED IMPROVEMENTS : Step 1 Weak areas (with the new threshold) are listed based on coverage measurement made for the validation. Part of a line with two problematic areas (blue arrows) Impact on GSM-R of nationwide introduction of ETCS

7. 4. Improve radio quality in a live network (II) Step 2 Analyzing the possibilities to improve locally the coverage. Impact on GSM-R of nationwide introduction of ETCS

8. 4. Improve radio quality in a live network (III) Step 3 • Evaluation of the listed possibilities: • Difficulties (building permit, environmental permit, …) • Frequency planning constraints Impact on GSM-R of nationwide introduction of ETCS

9. 5. Capacity (I) • Theoretical & real “train traffic” • RBC implementation • Site locations and cell sizes • Line speed Analysis of Train Traffic in function of: Impact on GSM-R of nationwide introduction of ETCS

10. 5. Capacity (II) Micro cells are used in areas with high traffic density (e.g. a railway station) Impact on GSM-R of nationwide introduction of ETCS

11. 5. Capacity (III) 03.04.2014 Impact on GSM-R of nationwide introduction of ETCS

12. 6. Introduction in to a live network Step 1 • Site “On air”: First call possible. Step 2 • Limited “measurement campaign” with measurement train allowing first analysis and fine tuning of radio parameters. Step 3 • Validation of the ETCS lines following QoS specifications (Subset-093, O-2475) using a measurement train. Step 4 • Permanent monitoring via “mobile call generator” on board of passenger trains and with other monitoring tools. Impact on GSM-R of nationwide introduction of ETCS

13. 7. Figures • Current situation : • 488 existing live sites, from which 189 sites on future ETCS2 lines. Impact on GSM-R of nationwide introduction of ETCS

14. 8. Evolution and Conclusion Smaller cells and GPRS usage are important aspects to consider in order to fulfill the needs for higher capacity demand. • Control of interferences by own network and disturbances of public operators is a must to achieve QoS: • Smaller cells = tighter frequency reuse • Improve the GSM-R coverage • Improved radio modules (receiver) • Better coordination with national regulator ETCS over GPRS offers better usage of radio resources than CS. Impact on GSM-R of nationwide introduction of ETCS

15. ? QUESTIONS Impact on GSM-R of nationwide introduction of ETCS