The Multi-Gigabit mobile RANCoverage & Capacity with SoC-based Compact BTS

Joachim Hallwachs, VP M & BD, DesignArt Networks

DesignArt Networks – Confidential 2008 2

Operators face tough requirements in 4G data networks

Imagine, if all subscribers would have Smart Phones … !

• Increased mobile data usage more capacity density needed• More indoor service consumption in indoor locations• Dynamic geography of demand flexible deployment model

Shannon’s law is clear… need to install more cell sites…• A “dense cell underlay” is needed to deliver mobile data capacity

Traditional RAN architecture is no longer feasible• per-site installation, equipment & backhaul costs are too big

The current 4G RAN architecture needs to evolve …

Data Capacity ExplosionAre we well equipped … ??

DesignArt Networks – Confidential 2008 3

Evolving RAN InfrastructureTraditional 2G/3G RAN - Equipment Classification

Traditional Equipment - Definitions:• MicroBTS = Same technology as MacroBTS, single cabinet• Discrete multi-card technology = air-conditioned shelter or cabinet• New-site development costs between $ 75,000 and $ 250,000

BTS Type Integrated BTSCell Type macrocell microcell

Application Outdoor Coverage

Range 1 - 25 km 0.5 – 5 km

Sectors 3 - 6 1 - 3

Power Out 10-20 W 2-4 W

Subs/Sector > 200 < 200

RF - Tx/Rx 2x2, 4x4 2x2

PA Type Discrete PAs

How do we evolve the current RAN architecture to

yield multi-gigabit data capacity ??

DesignArt Networks – Confidential 2008 4

In order to build multi-gigabit 4G RAN Metrozones, allof the following conditions have to be met: Very compact equipment – minimize site-related CAPEX

Low-cost equipment – minimize equipment CAPEX

Low-cost self-backhaul – minimize backhaul CAPEX & OPEX

Low site complexity at “any location” – minimize site-related OPEX

Automated operation (SON) – minimize network-related OPEX

Flexible RF / antenna array options – location-specific RF configuration

“Compact Base Stations” with “Self-Backhaul”

4G RAN EvolutionMulti-gigabit Metrozones - Key Requirements

DesignArt Networks – Confidential 2008 5

Evolving RAN InfrastructureTraditional 2G/3G RAN - Equipment Classification

Traditional Equipment - Definitions:• MicroBTS = Same technology as MacroBTS, single cabinet• Discrete multi-card technology = air-conditioned shelter or cabinet• New-site cost between $75,000 and 200,000

BTS Type Integrated BTSCell Type macrocell microcell

Application Outdoor Coverage

Range 1 - 25 km 0.5 – 5 km

Sectors 3 - 6 1 - 3

Power Out 10-20 W 2-4 W

Subs/Sector > 200 < 200

RF - Tx/Rx 2x2, 4x4 2x2

PA Type Discrete PAs

By itself this isnot suitable for cost-effective

multi-gigabit RAN

DesignArt Networks – Confidential 2008 6

A new BTS Equipment ClassCompact BTS – needed for the Multi-Gigabit RAN

Compact BTS EquipmentApplication macrocells microcells picocells indoor pico APs

General Single-enclosure BTS, size and cost reduced by extensive use of SoC technology. Contains all BTS components, such as Control Layers, MAC and PHY - as well as digital radio front-end (DFE) and analog RF/PA sub-systems.

Spec Size, Weight and Power Consumption are driven by the heat-dissipation of the integrated PA. [Compact BTS are passively cooled and never require air-conditioned shelter or cabinet]

Power Consumption Up to ~170W 50W to 120W 25W to 60W 10W to 25W

Antenna Options Discrete Antennas multi-sector Options

Discrete Antennas multi-sector Options

Integrated Antennas multi-sector Options

Integrated Antennas single sector

Physical Form Factor Identical to RRH similar to small RRHor outdoor Access Point outdoor Access Point Indoor Access Point

RF Array Support 2x2 - 8x8 2x2 - 4x8 4x4 4x4

Mounting Locations

Dependent on actual Compact BTS Equipment Form Factor (size, weight, power consumption)

Tower, roof tops Tower, roof tops, side walls

Side walls, lamp posts, traffic lights, poles, … MSO cable strands, ...

Floors, SMB, MTU, …

Operational Controlled and monitored remotely, very high MTBF (HW)

Multi-protocol Software-defined archetecture supporting multiple, simultaneous technologies including HSPA, LTE, WiMAX

Self-backhaul, Relay Hub Functionality Hub Functionality Self-Backhaul for Metrozone Deployments tbd

Subscribers Flexible - driven by site location, cell size, local market demography

Subs per Sector > 200 < 200 < 100 < 50

Source: In-Stat, 5/2010

DesignArt Networks – Confidential 2008 7

Evolving RAN InfrastructureEvolving 3.9G RAN - Equipment Classifications

BTS Type Distributed BTS Compact BTS (single-box)Cell Type macrocell microcell microcell picocell pico AP

Application Outdoor Coverage OutdoorCoverage

OutdoorFill-In

IndoorCoverage

Range 1 - 25 km 0.5 – 5 km 0.2 – 1 km SMB/Floor

Sectors 3 - 8 1 - 3 1 - n 1

Power Out 20 - 40 W 2 - 10 W 0.5 - 2 W 2 x 250 mW

Subs/Sector > 200 < 200 < 100 < 50

RF - Tx/Rx 2x4, 4x4, … 2x2

PA Type Discrete PAs PA-IC

Emerging Compact BTS – Capacity Fill-In and Coverage:• Compact BTS = SoC-based, single-box BTS, with RF/PA options for various Cell Types• Picocell & PicoAP = Out- & indoor variants of PA-IC based Compact BTS• SoC-based BTS cannibalize MicroBTS, enable Metrozone locations for deployment

DesignArt Networks – Confidential 2008 8

Evolving RAN Infrastructure Distributed 4G – PA Linearization Requirement

Multi-gigabit 4G RAN - Definitions:• Compact BTS = SoC-based single-box BTS for all site types – Macro-, Micro- and Picocells • DFE Gain = Reduction in power consumption through SoC-embedded RRH functionality

• Passively cooled all-outdoor BTS equipment RRH-enabled SoCs flexible cell locations

MacroBTS Compact BTS (single-box)Cell Type distributed macrocell microcell picocell pico AP

Application Outdoor Coverage - MetroZone IndoorCoverage

Range 1 - 25 km 0.5 – 5 km 0.2 – 1 km SMB/Floor

Sectors 4 - 8 1 - n 1

Power Out 20-80+ W 20-80 W 5-20 W 1-5 W 4 x 250 mW

Subs/Sector > 200 < 200 < 100 < 50

RF - Tx/Rx 2x2 - 8x8 2x2 - 4x4 4x4

PA Type Discrete PAs Discreteor PA-IC PA-IC

DFE Gain > 400 W > 100 W > 50 W < 10 W

DesignArt Networks – Confidential 2008 9

Building Ethernet

MacroDAS

PHY

Macro BTS

Microcell

DesignArt

Picocell

DesignArt

IndoorAccessPoints

Compact BTSMacrocell

DAS

Macro BTS

4x4 micro

PHY PHY

Metro Ethernetwireless

buildings towers

fixed

4x4 pico

4x8 macro 4x4 macro

Service Control

PHY

2x2 APs

Service Control

Compact BTS

Distributed 4G Network:• [3G/]4G Compact Base Stations• Fixed & wireless Metrozones

• Distributed MetroBTS Architecture• [Metro-] Ethernet Connectivity

• Centralized Service Control

Multi-gigabit 4G RAN ArchitectureDistributed managed 4G RAN

Distributed 4G BTS Markets• Built to support wide 4G channels• Compact, low cost, easy to install• Wireless relay & self-backhaul

4x4 APs

4x4 APs

DesignArt Networks – Confidential 2008 10

Multi-gigabit 4G RAN Architecture The 4G Mobile Metrozone

Embedded high-capacity Self-backhaul SLA-grade, multi-hop Clusters (end-to-end QoS)

− “Zero-cost” in-band Self-backhaul & Relay− Out-of-band, multi-hop Self-backhaul & Relay

Centralized backhaul Cluster Management (Feeder AP)− Adaptive, SW-driven Mesh Topology

MetroZone Powerful ultra-compact Access Points (APs) Self-organized Service Access (SON-A)

− Much improved Building Penetration

Self-organized Service Backhaul (SON-B)− Unmatched mesh-wide Capacity Density

On-demand 4G Service Deployments

Clusters of “Metrocells”(adaptive, synchronized tree topology)

Feeder APConnection to fixed Backhaul

Relay APMulti-hop Relay

PmP WirelessSelf-Backhaul

Thank you !!!