1. DETNET crosshauling requirements draft-bernardos-detnet-crosshaul-requirements
Carlos J. Bernardos (UC3M), Antonio de la Oliva (UC3M), Luca Cominardi (InterDigital), Luis M. Contreras (Telefonica)
Seoul, DETNET, November 2016

2. draft-bernardos-detnet-crosshaul-requirements-00
Objectives
Discuss requirements for integrated fronthaul and backhaul (crosshaul/xhaul) transport networks based on the work of the EU 5G-Crosshaul project
Check against the requirements already included in draft-ietf-detnet-use-cases
Suggest (if needed) changes/additional requirements
97th IETF, Seoul
draft-bernardos-detnet-crosshaul-requirements-00

3. draft-bernardos-detnet-crosshaul-requirements-00
Objectives
Discuss requirements for integrated fronthaul and backhaul (crosshaul/xhaul) transport networks based on the work of the EU 5G-Crosshaul project
Check against the requirements already included in draft-ietf-detnet-use-cases
Suggest (if needed) changes/additional requirements
97th IETF, Seoul
draft-bernardos-detnet-crosshaul-requirements-00

4. Fronthaul/backhaul in cellular nets
RRH: Remote Radio Head
BBU: BaseBand Unit
RAN: Radio Access Network
EPC: Evolved Packet Core
Fronthaul: connects RRHs to BBUs
Mostly based on CPRI over fiber
Backhaul: connects RAN to the core
Mostly IP networks
97th IETF, Seoul
draft-bernardos-detnet-crosshaul-requirements-00

5. Crosshaul requirements
Functional requirements
Support multiple functional splits simultaneously
Including Backhaul and CPRI-like Fronthaul
Multi-tenancy.
Isolate traffic (guaranteed QoS)
Separate traffic (tenant privacy)
Differentiation of forwarding behavior
Multiplexing gain
Tenant ID (identification of tenants' traffic)
Coexistence, Compatibility
Ethernet (same switching equipment, for example different ports, etc.)
Security support
Synchronization: IEEE1588, IEEE802.1AS
97th IETF, Seoul
draft-bernardos-detnet-crosshaul-requirements-00

6. Crosshaul requirements (cont’d)
Functional requirements (cont’d)
Transport efficiency
Short overhead
Multi-path support
Flow differentiation
Class of Service Differentiation
Management
In band control traffic (OAM info, ...)
Energy efficiency
Energy usage proportional to handled traffic (e.g., sleep mode, reduced rate)
Support of multiple data link technologies
IEEE 802.3, (including mmWave), etc
97th IETF, Seoul
draft-bernardos-detnet-crosshaul-requirements-00

7. Crosshaul requirements (cont’d)
Performance requirements
Latency: < 100 us (IQ data between RRH and BBU)
For Control & Management (C&M) traffic: No requirement
Frame loss ratio (FLR): < 10E-7
For C&M, FLR < 10E-6
Synchronization, depends on the Radio Access Technology (RAT)
Intra-band contiguous carrier aggregation RATs: < 10ns
Multiple-Input and Multiple-Output (MIMO) and transmit diversity RATS: < 45ns
Intra-band non-contiguous and inter-band carrier aggregation RATs: < 110ns
Time division duplex RATs: < 110ns
97th IETF, Seoul
draft-bernardos-detnet-crosshaul-requirements-00

8. Next steps. Relation to draft-ietf-detnet-use-cases
draft-ietf-detnet-use-cases already includes a very comprehensive and good coverage of backhaul and fronthaul DETNET requirements
Are there any differences?
Performance requirements differ a bit
Are there additional functional or performance requirements that need to be considered?
E.g., introduced by 5G or by the integration of backhaul and fronthaul
If needed, include some text in draft-ietf-detnet-use-cases
97th IETF, Seoul
draft-bernardos-detnet-crosshaul-requirements-00