anycell connectivity supporting any mobile radio technology

Ulrich Kohn – Director Technical Marketing

LTE World Summit 2014

AnyCell Connectivity Supporting any Mobile Radio Technology

© 2014 ADVA Optical Networking. All rights reserved. Confidential. 2 2

3GPP Radio Interface Innovation

From 2G trough 4G and beyond …

QoS Management

More Spectrum

Air Interface Evolution

Carrier Aggregation

Spectrum Re-Use

Interference Coordination


AnyCell™ Connectivity

Evolved Packet Core Macro Cell

Small Cell

Small Cell (RRH)

Macro Cell Hub Site

Small Cell (RRH)

Backhaul and fronthaul efficiency for radio access networks

Managed Fronthaul Connectivity

Assured Time/Phase Synchronization

Agenda:


Application Radio Interface Backhaul

Frequency Phase Frequency Phase

CDMA 2000 ±50ppb ±3 to 10µs GPS GPS

GSM ±50ppb n/a ±16ppb n/a

WCDMA ±50ppb n/a ±16ppb n/a

LTE (FDD) ±50ppb n/a ±16ppb n/a

LTE (TDD) ±50ppb ±1.5µs ±16ppb ±1.1µs

LTE-A MBSFN ±50ppb ±1 to 5µs ±16ppb ±1.1µs

LTE-A CoMP ±50ppb ±1 to 5µs ±16ppb ±1.1µs

LTE-A eICIC ±50ppb ±1 to 5µs ±16ppb ±1.1µs

Mobile Backhaul Synchronization Needs

new new


Network-based timing distribution

• ITU-T Synchronous Ethernet: Good long-term solution for hop-by-hop frequency distribution

• IEEE 1588v2 – Precision Time Protocol: Favored solution for combined frequency & phase alignment

GNSS-based synchronization

• GPS or GLONASS: Global coverage with availability challenges

Combination required to meet precision and availability targets

IEEE 1588

GPS/ GNSS

SyncE

RAN Synchronization Options


Synchronization Delivery Challenges

Jitter, wander and asymmetric delay are causing timing error

Frequency Synchronization

Time/Phase Synchronization

Delay Asymmetry

Packet Delay Variation


• Antennas must have line-of-sight to multiple satellites

• Easy to jam both maliciously and unintentionally

• Interference caused by weather conditions

• Reflections at tall buildings in urban canyons

Challenges with GNSS

Availability issues plus high deployment and maintenance cost

Radio Base Station

GNSS


• Frequency holdover to within 16ppb for 72 hours is practical

• Rubidium or dual-oven quartz technology

• No oscillator technology will achieve the required holdover performance of ±1µs over 72 hours

• Rubidium clock will hold ±1µs for 8 hours

• PRTC-quality Cesium clock will hold ±1µs for one day

• ±1µs over 72 hours equals approximately 0.004ppb

Holdover Boundary Conditions

Need to constantly track a reference for time protection


1588v2 PTP Frequency Synchronization

Over-the-top implementation across non-sync-aware backhaul

T-GM

GNSS

PRTC

PTP Grandmaster

PTP Slave Clock

Packet-Based Backhaul Network

T-SC

Radio Base Station


1588v2 PTP for Phase Synchronization

Lacking end-to-end control of delay asymmetry in the network

T-GM

GNSS

PRTC

PTP Grandmaster

PTP Slave Clock


T-SC

Radio Base Station

Each network element needs to be PTP-aware (T-BC)


Combined APTS and mini-GM Deployment

Efficient and highly available synchronization of radio base stations

T-GM

GNSS

PRTC

PTP Grandmaster


APTS mini-GM

Local Base Station

GNSS

Remote Base Station

T-SC

T-SC

T-SC

T-SC


Visibility Across the Entire Network

Monitoring the performance of the synchronization infrastructure

T-GM

GNSS

PRTC

PTP Grandmaster

APTS mini-GM Probe

Local Base Station

GNSS

Remote Base Station

T-SC

T-SC

T-SC

T-SC

End-to-End Measurement of Delay Asymmetry

Remote Slave Clock

Testing

Local Slave Clock

Testing


Self-Calibration and Clock Validation


• Precise and robust delivery of phase synchronization

• Combining grandmaster with network- based synchronization distribution

• Suitable for network upgrade and greenfield applications

• Synchronization delivery and most advanced assurance functions

OSA 5410 FSP 150SP-100

APTS and mini-GM in a Single Device

Simplifying the evolution to TD-LTE and LTE-Advanced


From Remote Radio Head to Cloud-RAN

RRH

RRH

RRH

BBU

RRH

RRH

BBU

RRH EPC

CPRI

CPRI

S1

S1

X2

RRH

RRH

RRH

RRH

RRH

RRH EPC

CPRI

CPRI

S1

X2

BBU Pool

Centralizing control for improved flexibility and efficiency


• Benefits

• Tight interference and spectrum coordination

• Highest spectral efficiency

• Phase synchronization of RRHs not required

• Small footprint and simple deployment

• Challenges

• Low-latency, high bandwidth connection

• CPRI needs to be transported over fiber

• Limited reach

• WiFi small cells not supported by CPRI standard

Centralized vs. Distributed BBUs

Fronthaul and backhaul will co-exist for RAN interconnection


Passive DWDM for Fronthaul Connectivity

Challenge: passive DWDM lacks ability to assure service integrity

RRH

RRH

RRH

RRH RRH RRH

Small Cell Small Cell Small Cell Macro Cell

Centralized BBU Pool

FSP 3000 ALM


Access Link Monitoring (ALM)

Access Link Monitoring (ALM) is designed for intelligent passive optical multiplexing

• Clear demarcation of fiber infrastructure to the rest of the equipment through use of a probe reflector

• Simplified root cause analysis as ALM supervises the health of the fiber infrastructure

• Simple integration into NMS by north-bound interface

CPE Device

Access Fiber Link

Probe In/Out Probe Reflect

CO Device

Reflecta

nce

1x

Measurement Principle

Distance


OptojackTM Fronthaul Monitoring

Non-intrusive fiber monitoring and optical service assurance

RRH

RRH

RRH

RRH RRH RRH

Small Cell Small Cell Small Cell Macro Cell

Centralized BBU Pool

FSP 3000 ALM

FSP Service Manager

Probe Reflect


Why ADVA Optical Networking?

Fronthaul Network

Active and passive solutions for managing

connectivity

Comprehensive Portfolio

Synchronisation DWDM

Carrier Ethernet Assurance

Synchronization Enablement

Different needs even with same network ask for

versatile solution

ADVA Optical Networks protects your investment and paves the way to higher network performance

Thank You

IMPORTANT NOTICE

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Copyright © for the entire content of this presentation: ADVA Optical Networking.

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