Report on Recent EANTC Cellular Backhaul Multi-Vendor Interoperability Testing

Report on Recent EANTC Cellular Backhaul Multi-Vendor

Interoperability Testing

European Advanced Networking Test Center Carsten Rossenhoevel, Managing Director 2013-11-05

About the European Advanced Networking Test Center

Vendor independent network quality assurance since 1991 Unique technical expertise of network design and testing in latest technology areas 20-year testing experience matches highest quality standards

Business Areas Test and certification of network

components for manufacturers Network design consultancy and

proof of concept testing for service providers Request for Proposal (RfP) support, acceptance testing

and network audits for large enterprises and government organizations

Vendor neutral technology seminars

2013

Current Interoperability Test Event Focus

• Gathering of many people in confined space (spectrum depletion) • Better coverage indoor • Increase mobile-network edge coverage (quality of experience)

Why did we choose Small Cell Backhaul?

• High speeds while maintaining spectral efficiency requires tight synchronization of both frequency and time

• Service continuity is enabled through protection mechanisms • Service level assurance is tracked using fault and performance

monitoring

What is important to check in Small Cell Backhaul?

Hot Staging August/ September 2013

Spent two weeks in EANTC‘s lab in Berlin, Germany Focus on Small Cell Backhaul Integrated end-to-end network demonstrating relevant use

cases

Participating Vendors & Devices

Vendor Calnex Paragon-X

Ericsson MINI-LINK PT 2020 MINI-LINK PT 3060 MINI-LINK SP 110 MINI-LINK SP 210 MINI-LINK SP 310 MINI-LINK SP 415 MINI-LINK SP 420 MINI-LINK TN SPO 1410

Huawei Huawei ATN905-indoor Huawei ATN905-outdoor Huawei ATN910I Huawei ATN910B Huawei ATN950B Huawei CX600-X1-M4 Huawei CX600-X2-M8

Vendor

Ixia Anue 3500 Anue GEM Anue XGEM ImpairNet IxNetwork

RAD ETX-205A ETX-220A MiNID

Spirent Communications

Spirent TestCenter

Symmetricom SSU 2000e TimeProvider 1500 TimeProvider 2300 TimeProvider 2700 TimeProvider 5000

Small Cell Backhaul Interoperability Topology

EANTC Interoperability Testing Focus Small Cell Backhaul

•Phase support – for tight coordination in the time domain (e.g., eICIC), enabling higher speeds along with better spectral efficiency

•Heterogeneous networks support – where not all devices along the path support synchronization (partial on-path support), e.g., third party leased lines.

•Resiliency – Clock redundancy via best master clock selection •New grandmaster clock elements topologically closer to the cell sites

Synchronization

•Protection scenarios: ring protection for large number of nodes, linear protection for the backhaul

•QoS support on microwave transport – prioritize traffic in bad weather conditions

Transport

•Multipoint fault monitoring – monitor large number of devices efficiently •Performance measurements per EVC per Class of Service (CoS) – enables monitoring and

enforcing SLA on a service level (e.g., video delivery)

Operations

EANTC Packet Clock Interoperability Testing Evolution

MBH 2008

• Single vendor demos: 1588v2, SyncE

CEWC 2008

• First 1588v2 interop

MPLS 2009

• First SyncE interop

CEWC 2009

• First ESMC interop

MPLS 2010

• First hybrid mode (1588v2 + SyncE) interop

CEWC 2010

• First transparent clock interop; Phase requirements added

MPLS 2011

• First boundary clock interop

CEWC 2011

• First SyncE over Microwave Nodes interop

MPLS 2012

• First SyncE over LAG and SyncE Islands interop

CEWC 2012

• First hybrid mode boundary clock and best master clock interop

MPLS 2013

• First hybrid mode transparent clock interop

EW 2013

• First distributed master clock and Ethernet multicast scope interop

EANTC Packet Clock Testing Coverage to Date

IEEE 1588v2

Grandmaster/ Slave Clocks

Best Master Clock Selection

Boundary Clocks

Partial on-path Support

Transparent Clocks

Correction Field Accuracy

Performance Targets (ITU-T)

Frequency TIE/MTIE (G.8261)

Time of Day/Phase Accuracy (G.8271)

PDV at network limits (FPP) (G.8261.1)

Profiles/Transports

ITU-T Telecom Profile (Freq.)

G.8265.1

IPv4 Unicast (Annex D)

Ethernet Multicast (Annex F) SyncE

Frequency Transfer (G.8262)

ESMC (G.8264)

SyncE over Microwave

SyncE over LAG

SyncE + 1588v2

Hybrid Mode

Hybrid Mode Boundary Clock

Hybrid Mode Transparent

Clock

SyncE Islands

Clock Synchronization: Transparent Clock

• 5 implementations tested G.823 SEC mask (frequency) G.8271 time/phase accuracy level 4

(±1.5µs)

Transparent Clocks mitigate the effects of packet delay variation, allowing faster and more accurate synchronization

Clock Synchronization: Boundary Clock

• 7 implementations tested All passed G.823 SEC mask (frequency) All qualified for G.8271 time/phase

accuracy level 3 (±5µs) and level 4 (±1.5µs)

• PDV based on G.8261 test case 12, both segments (partial on-path support)

• One boundary clock supported multiple profiles upstream/downstream, improving master/slave interoperability

Boundary Clocks enable scaling of the clock synchronization topology

Clock Synchronization: Distributed Grandmaster Clock

• 2 distributed grandmaster clocks tested All passed G.823 SEC mask (frequency) All passed G.8271 time/phase accuracy

level 5 (±1µs)

Distributed Grandmaster Clocks are deployed closer to cell sites, reducing the risk of clock infrastructure failure and reducing PDV and asymmetry.

Clock Synchronization: Best Master Clock Selection

• 5 implementations tested • Induced grandmaster clock switching

using Priority1 values • Induced grandmaster clock switching

using impairment to drop all PTP packets • Verified correct data structures at

boundary and slave clocks

Best Master Clock Selection provides clock source resiliency in the event of quality degradation or node failure

Carrier Ethernet Transport: Ethernet Ring Protection Switching

• 5 successful test runs with 8 implementations • Verified resiliency by emulating link failure; verified restoration by

resolving link failure • Observed failover time between 6 to 35 ms, restoration up to 16 ms

Ethernet Ring Protection Switching provides resiliency in terms of port quantity, best used in a tight geographical area with large number of nodes

Carrier Ethernet Transport: Microwave QoS Support

• Configured QoS using MPLS EXP • Verification of test setup performed

under no attenuation resulting in no traffic loss

• Used RF attenuator to reduce the microwave link capacity

Microwave QoS Support in conjunction with adaptive multi-rate encoding ensures availability of high priority traffic during bad weather conditions

Carrier Ethernet Life Cycle: Performance Monitoring per CoS for Point-to-Point EVC

• Measurement per EVC per Application (CoS)

• Artificial delay introduced per EVC per class of service for validation

• Successful test runs with four implementations

Performance Monitoring per Class of Service (CoS) allows to monitor the service levels of individual mobile services

Multi-Vendor Interoperability Event White Paper

Detailed white paper available at http://www.eantc.de/ew2013

Summary

Small Cell backhaul tests are making good progress Limited number of leading vendors is committed Future work:

Continue phase synchronization testing, following new IEEE and ITU standards

Evaluate new microwave solutions for tightly coupled small cells on streets

Focus service assurance testing for large-scale backhaul deployments

Next EANTC backhaul interoperability test event at MPLS & Ethernet World Congress, Paris, March 18-21, 2014

Thank you for your interest!

For further information, please contact us: EANTC AG Salzufer 14 D-10587 Berlin Germany Phone: +49.30.318 05 95 - 0 Fax: +49.30.318 05 95-10 E-mail: [email protected] www.eantc.de