AnyCell Connectivity - A New Era for Mobile Networks

Dr. Michael Ritter

AnyCell™ Connectivity – A New Era for Mobile Networks

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Fully IP-Oriented

Radio Access Network Evolution

1992 2003 2009 2011 2013

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Public Access Small Cells

Different small cell flavors and deployment scenarios

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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

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• 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

• Multi-radio LTE+WiFi small cells not supported

Centralized vs. Distributed BBUs

Fronthaul and backhaul will co-exist for RAN interconnection

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Evolution Towards Super Cells

Connectivity for any protocol, capacity, size and topology

Legacy RAN HetNet

Super Cells Centralized RAN

Mobile Fronthaul

Mobile Backhaul

Next-Gen Backhaul

AnyCell™ Connectivity

more nodes deeper network

more deployment options

more capacity lower latency more transparency

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Mobile Backhaul for Small Cells

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HetNet – Heterogeneous Networks

HetNet is fast becoming a reality to be supported by the backhaul network

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• Environmentally hardened – outdoor deployment

• Ergonomically appealing – form, size and color

• Installation options – compliant to local planning requirements

• Security profile – more easy to gain access

Small Cell Demarcation Challenges

Small footprint, light weight and high security

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End-to-End Service OAM

FSP 150 provides rich service OAM consistent across the entire network

• Critical for turn-up, assurance and trouble shooting

• Rich OAM implementation enables high service availability

• Standardized implementation for seamless inter working

• Tight performance constraints require accurate measurement

Turn-Up Testing

In-Service Monitoring

Performance Assurance

Trouble Shooting

Network Maintenance

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Small Cell Backhaul

Small Cells

Macro Cell Evolved

Packet Core

Macro Cell Backhaul Network

Small Cell Backhaul Network

Leading to a deeper and more heterogeneous infrastructure

Small Cells

FSP Service Manager

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Radio Access Network Synchronization

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Need for Phase Synchronization

Challenge to synchronization architecture of today’s networks

• Time Division Duplex mode (TD-LTE)

• Small cells enable more efficient spectrum utilization

• Enhanced Inter-Cell Interference Coordination (eICIC)

• Coordinated Multipoint transmission (CoMP)

Downlink

Uplink

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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

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RAN Synchronization Options

• 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 and phase alignment

• GNSS-based synchronization

• GPS or GLONASS Global coverage with availability challenges

Combination required to meet precision and availability targets

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Syncjack™ Timing Distribution & Assurance

Efficient and highly available synchronization of radio base stations

T-GM

GNSS

PRTC

PTP Grandmaster

Packet-Based Backhaul Network

APTS mini-GM Probe

Local Base Station

GNSS

Remote Base Station

T-SC

T-SC

T-SC

T-SC

FSP Sync Manager

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Managed CPRI Fronthaul

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Application Channels Antenna Configuration CPRI Line Rate

WCDMA 4 x 5 MHz 1 sector, MIMO 2x2 1228.0 Mbps

LTE 20 MHz 1 sector, MIMO 2x2 2457.6 Mbps

WCDMA & LTE 1 x 5 MHz 20 MHz

3 sectors, MIMO 2x2 9830.4 Mbps

CPRI Interface Protocol

Scaling with technology, channel spectrum and radio sectors

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Mobile Fronthaul Architectures

All common network architectures are supported by CPRI

Point-to-Point

Star

Linear

Ring

RRH BBU

RRH

RRH

RRH

RRH

RRH BBU

RRH

RRH

RRH BBU

RRH RRH

RRH

BBU

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Access Link Monitoring for Fronthaul

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

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AnyCell™ Connectivity

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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

mritter@advaoptical.com

Thank You

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