D1.1 – Drive-by-Data Requirements Specification
Safe4RAIL-2 D1.1 Page IV
Contents
Chapter 1 Introduction ......................................................................................... 7
1.1 Scope ............................................................................................................... 7
1.2 Definitions ........................................................................................................ 7
Chapter 2 Requirements structure ...................................................................... 9
2.1 Requirements characteristics ........................................................................... 9
2.2 Requirements writing rules ............................................................................ 10
2.3 Requirements attributes ................................................................................. 12
Chapter 3 Architecture Requirements .............................................................. 14
3.1 Network Device - Requirements from CONNECTA-2 .................................... 15
3.2 Network Level Inauguration Requirements .................................................... 23
3.3 Device Level Inauguration Requirements ...................................................... 26
3.3.1 Device Level Inauguration Requirements (Variant D topology) ......................26
3.3.2 ETB topology discovery .................................................................................29
3.3.3 Inauguration requirements .............................................................................30
3.4 Network Device - Clock Synchronisation Requirements ................................ 33
3.4.1 Clock Sync Time Dissemination ETB ............................................................33
3.4.2 Synchronization Architecture – Grandmaster Clock, Synchronous Startup on
Power-Up 40
3.4.3 Synchronization Architecture – Master Clock Resynchronization ..................44
3.4.4 Synchronization Slaves and Network Traffic Control .....................................46
3.5 Network Device - ETB Services Requirements .............................................. 49
3.5.1 TTDB, ECSP, Annex E ..................................................................................49
3.6 Network Device - Flow Control Requirements .............................................. 62
3.6.1 Frame Identification, Queues, Priorization, Scheduled Traffic........................62
3.6.2 Ingress Policing .............................................................................................63
3.6.3 Egress Policing .............................................................................................67
3.7 Network Device - Gateway Requirements ..................................................... 71
3.7.1 ETBN/ECN-Gateway .....................................................................................71
3.7.2 TSNGW Configuration ...................................................................................75
3.7.3 Status and Health of TSNGW ........................................................................79
3.8 Network Device - Redundancy Requirements ............................................... 81
3.8.1 802.1CB related requirements .......................................................................81
3.8.2 VRRP related requirements ...........................................................................82
3.9 Network Device - Network Management Requirements ................................ 85
3.9.1 DHCP, DNS, other generic network services .................................................85
