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Table 3 Priority of T2W services

From: A novel network architecture for train-to-wayside communication with quality of service over heterogeneous wireless networks

Priority Services
1 (low) Passenger internet
2 Crew intranet
3 Diagnostics
4 Application update
  Content update
  TCMS event
5 CCTV security
6 Intercom (VoIP)
  CCTV safety
  TCMS cyclic
7 Public address
  PIS data
8 (high) Configuration traffic