eCPRI Specification V2.0 (2019-05-10)
6.2.1. Synchronization of eRE ................................................................... 65
6.2.2. Synchronization of eREC................................................................. 65
6.2.3. Synchronization of IWFs .................................................................. 65
6.3. Link Delay Management ............................................................................. 65
6.3.1. Reference Points for Delay Measurement ....................................... 66
6.3.2. Delay Management example ........................................................... 70
6.4. Network Connection Maintenance ............................................................. 72
6.5. Networking .................................................................................................. 73
6.5.1. Difference between eCPRI and CPRI .............................................. 73
6.5.2. eCPRI/CPRI networking with eCPRI/CPRI IWF type 0 .................... 74
6.5.3. eCPRI/CPRI networking with eCPRI/CPRI IWF type 1 and type 2 ... 75
6.6. Priority considerations ............................................................................... 76
6.7. Message Ordering Considerations ............................................................ 76
6.8. Security ........................................................................................................ 77
6.8.1. eCPRI Network Security Protocol .................................................... 77
6.8.2. eCPRI Network Security Specification ............................................. 77
6.8.2.1. User plane ................................................................ 77
6.8.2.2. C&M plane ................................................................ 77
6.8.2.3. Synchronization plane............................................... 77
7. Annex B – eCPRI/CPRI Interworking with IWF type 0 (Informative) ...................... 78
7.1. Concept ....................................................................................................... 80
7.2. Bridging of User Plane ................................................................................ 81
7.3. Bridging/Routing of C&M Plane ................................................................. 82
7.4. Bridging of Synchronization Plane ............................................................ 83
7.5. Bridging of L1 inband protocol .................................................................. 83
7.6. Start-up Sequence ...................................................................................... 84
8. Annex C – eCPRI/CPRI Interworking with IWF type 1 and type 2 .......................... 85
8.1. Concept ....................................................................................................... 85
8.2. Definition of IWF type 1 and IWF type 2 CPRI ports ................................. 85
8.3. Bridging of User Plane ................................................................................ 86
8.4. Bridging/Routing of CPRI Control Words .................................................. 86
8.5. Bridging of Synchronization Plane ............................................................ 86
8.6. Bridging/handling of CPRI sub-channels 0 and 2 ..................................... 87
8.7. Start-up Sequence ...................................................................................... 87
8.7.1. eCPRI/CPRI IWF Start-up sequence overview ................................ 87
8.7.2. Start-up Delay Management ............................................................ 88
8.7.3. IWF CPRI port start-up sequence .................................................... 90
8.7.3.1. General ..................................................................... 90
8.7.3.2. Layer 1 Start-up Timer .............................................. 90
8.7.3.3. State Description ...................................................... 91
8.7.3.4. Transition Description ............................................... 95
8.8. Synchronization .......................................................................................... 97
8.9. Delay Management ...................................................................................... 97
8.10. Handling of eCPRI Remote Reset and CPRI Reset ................................. 100
8.11. Link and Fault Management ..................................................................... 100
8.11.1. IWF CPRI transmitter fault recovery/actions for CPRI detected
faults ............................................................................................. 102
8.11.2. IWF CPRI transmitter fault recovery/actions for Ethernet detected
faults ............................................................................................. 102
9. List of Abbreviations .............................................................................................. 104
10. References .............................................................................................................. 107
11. History ..................................................................................................................... 108
