5G-Crosshaul: mmW Transport Trial at 5G -Berlin Testbed · PDF file5G-Crosshaul: mmW Transport...

5G-Crosshaul: mmW Transport Trial at 5G-Berlin Testbed

© 2016 InterDigital, Inc. All Rights Reserved.

5G Berlin – Crosshaul Testbed

© 2016 InterDigital, Inc. All Rights Reserved.2

Core Network

Cloud RAN

EdgeLink Gateway

LTE eNodeB(Backhaul)

Remote Radio Unit(Next Generation

Fronthaul)

Computing and Hypervisor Domains

Baseband Processing

Unit

Open EPC

Control Plane

EdgeLink Mesh SDN Controller

EdgeLink EMS

MME

S-GW, PGW

1GbE

10GbEEdgeLink Wireless mmW Transport

Internet and Services

Integrated mmW Mesh Transport – multiplexing Fronthaul and Backhaul traffic over long-range mmW links. SDN-enabled Mesh topology ensures fault tolerance and high-availability.

Cloud-RAN – Flexible Next Gen Fronthaul Interface over mmW

http://5g-crosshaul.eu/

EdgeLink – mmW 5G Wireless Transport SDN-based Multi-hop Mesh Network composed of Gigabit Millimeter Wave Links

– WiGig / 802.11ad baseband– 60GHz long range, high-gain antennas– Multi-tenant, multi-service level transport slice management– Mesh topology for fault tolerance and availability

EdgeLink Nodes: – Network Discovery and Neighbor Selection – OpenFlow-based, mmW MAC/PHY/RF

Mesh Controller Software: – SDN-based, manages the mesh topology to maintain

Transport Slice Service Level requirements

O&M Software– Cloud-enabled, web- interface for remote operations and

monitoring


InterDigital’sCloud-Based

Software PlatformOpenFlow Mesh Controller

WiGig Baseband

RF

WiGig Baseband

RF

. . .

SoftwareHardware

INTERDIGITAL MESH LAYER SOFTWARE

Antenna Unit

Network Unit

Views from the 5G Berlin Testbed3 EdgeLink mmW Nodes –

across the HHI and Berlin Technical University campuses


185 meters

140 meters95 meters

Indoor Lab Deployment

Outdoor Antenna Installation

Cloud RAN – Next Generation Fronthaul

Next Generation Fronthaul– FH traffic transported over UDP/IP packets– Reduced throughput and latency requirements in

comparison with CPRI-based FH– Load correlated with user’s traffic not system

bandwidth or MIMO scheme

Remote Radio Unit– Lower level LTE processing - PHY, MAC, RLC– Physical LTE layer emulated over Ethernet

Baseband Unit– Centralized higher LTE layers functionality: PDCP,

RRC and SCTP, S1AP– Co-located with EPC


Physical

RRCRadio Resource Control

Ethernet

PDCPPacket Data Control

Protocol

RLCRadio Link Control

MACMedium Access Control

Physical

RRCRadio Resource Control

PDCPPacket Data Control

Protocol

RLCRadio Link Control

NASNon-Access Stratum


Ethernet


IPInternet Protocol

SCTPStream Control

Transmission Protocol

S1APS1 Application Protocol

NASNon-Access Stratum

RRUUE MMELTE-Uu S1-MME

PHY Emulation over Ethernet

FH protocol

Ethernet

S1APS1 Application Protocol

SCTPStream Control

Transmission Protocol

IPInternet Protocol

Ethernet


BBU

IPInternet Protocol

FH protocol

IPInternet Protocol

Next GenerationFronthaul over mmW Ethernet

C-RAN RRU with EPCRRU with UE (laptop)

LTE eNodeB Base Station - Backhaul

Small Cell BBU– Azcom Small Cell BBU – 2x2 MIMO LTE-A system– OpenEPC by CND as Core Network – S1 connection over the InterDigital mmW mesh

Small Cell RRH– Azcom RRH for 2.6 GHz FDD 2x2 MIMO 25dbm– CPRI connection to Azcom BBU (2457, 6 Mbit/s)– Cabled 2x2 MIMO RF on 2.6 GHz FDD – Attenuators to simulate Over-The-Air Transmission

User Equipment– COTS LTE USB Dongle (Huawei E392u-21)– Capable of 100Mbit/s downlink and 50Mbit/s uplink– Cabled RF connection to Small Cell RRH


Small Cell BBU and RRH are collocated

and appear as legacy LTE eNodeB

to the mmW transport

UE (laptop with modem dongle)

5G Berlin – Crosshaul Testbed

Objectives Experiments / Scenarios

1. Evaluation and verification of SDN mmW Wireless Mesh as a viable 5G Integrated Fronthaul / Backhaul Transport solution

2. Transition from a Legacy CPRI-based interface to a Next Generation Fronthaul and deployment over of a SDN-based mmW transport

• Real-World / Commercial Applications: iPerf, Skype (video calls), Streaming Video, Browsing, Bit-Torrent, Speed test, etc., etc. on commercial devices

• Backhaul Only and Fronthaul Only Traffic: Impact of mmW link failures and recovery

• Combined FH / BH Traffic: Multiplexing of FH and BH over mmW + impact of mmW link failures and recovery

• Maximum EdgeLink mmW Capacity: Gigabit+ mmW links in full mesh and max single link configurations – 5G load levels

• Long-running Operation: mean-time-to- failure


Trial Timeline – Started in September 2016, extending through 4Q 2016.

Green – successfully executed demonstratedOrange – successfully executing with additional iterations in progress

Example Scenario: Fronthaul + Backhaul Traffic


Core Network

Cloud RAN

EdgeLink Gateway



Fronthaul)


Baseband Processing

Unit

Open EPC

Control Plane

EdgeLink Mesh SDN

Controller

EdgeLink EMS

MME

S-GW, PGW

1GbE

10GbE


Fronthaul and Backhaul traffic loaded into mmW Mesh –LTE Load - 150 Mbps DL + 50 Mbps UL

EdgeLink Wireless mmW Transport

Example Scenario: mmW Link Failure and Mesh Recovery


Core Network

Cloud RAN

EdgeLink Gateway



Fronthaul)


Baseband Processing

Unit

Open EPC

Control Plane

EdgeLink Mesh SDN

Controller

EdgeLink EMS

MME

S-GW, PGW

1GbE

10GbE


Backhaul mmW link failure, mesh reconfiguration, and backhaul traffic restoration


X

• Throughput– 1 – 1.2 Gbps – max mmW

link capacity– 200 Mbps – Full-LTE load

input on FH and BH– 10 – 20 kbps – in-band

signaling

• Link Failure Events– Naturally occurring +

injected

• Latency – ~ .7 ms per link

• Weather – Co-related to conditions

in Berlin


0

200

400

0

200

400

Example Scenario: Metrics and Performance Indicators



Fronthaul)


~52s

0

200

400

Conclusions and Observations…so far

• Demonstrated that a long-range mmW Mesh Transport Network is able to multiplex packet-based Fronthaul and Backhaul and to recover eventual mmW link blockages by means of SDN.

• Experimental results suggest that Next Generation Packet-based Fronthaul Interfaces (having less-stringent requirements compared to CPRI) can be effectively carried over Packet-based mmW Mesh Networks and multiplexed with Backhaul Traffic


Next Steps and Future Plans

• Continuing 5G Berlin Testbed Field Trial with additional experiments and data collection

• EdgeLink Network Controller / Multi-Domain Transport Orchestration– Northbound SDN Control Interface– mmW transport slices configured in a multi-domain transport environment

• mmW Wireless Mesh Transport integration with lower-layer Fronthaul functional split


5G-Crosshaul: mmW Transport Trial at 5G -Berlin Testbed · PDF file5G-Crosshaul: mmW Transport...

Documents

Transcript of 5G-Crosshaul: mmW Transport Trial at 5G -Berlin Testbed · PDF file5G-Crosshaul: mmW Transport...