In-Building Wireless Solution and Capacity Offload in 3G and LTE-V1.0

8/7/2019 In-Building Wireless Solution and Capacity Offload in 3G and LTE-V1.0

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www.scheinerttelecom.com

Dec 07, 2010

In-Building Wireless Solutions & Cellular

Capacity Offload in LTE Networks

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Enterprise options

Single antenna enterprisesrepeaterfemto/picoWiFi AP

Multiple antennae enterprises

repeater- DASfemto/pico - DASBTS-RRHsmultiple femto/picomultiple femto/pico w. controllerWiFi APs

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DAS Example 1

Source: ADC Communication

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DAS Example 2

Source: mobileaccess

Highlights:self-installableoverlayRJ-45/Ethernetcompatible

Head-End Element

RF Coverage Element


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Radio Remote Head Example

Source: NEC

Micro Radio Server

Remote Radio Head

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Example Femtos with Controller

Internet

SmartCloud Services Node

SmartCloud Radio Nodes

Centralized RF system auto-tuning and zero touch

optimizationCentralized soft-handovermanagement and anchoring

Source: SpiderCloud Wireless

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Option Matrix

System Local

capacity

Macro

offload

Data rate Reduced

Tariff/ rates

Cost Integrating

IT

Rep-DAS

no marginal low no Medium/high

Notpossible

Femto-DAS

yes yes high possible Low tohigh *

possible

BTS-

RRH

yes yes high possible Medium/

high

possible

Femtos yes yes Medium/high **

possible low Possible

Femtos/controller

yes yes high possible Low/medium

Possible

APs yes yes high n/a Low Possible

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* depends on self-installation** depends on configuration and SON features


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Option Matrix II

System Indoor-

Inter-

ference

Self-

installation

Handover

needed

withinenterprise

Handover

risk

(internal/external)

Multi-

operator

Unli-

censed

Rep-DAS

no Possible/difficult

no no Possible no

Femto-DAS

no Possible/medium

no low Possible no

BTS-RRH

no Difficult* no low Verydifficult

no

Femtos yes Possible/easy

yes Medium/high

Difficult no

Femtos/controller

yes Possible/medium

yes Low/medium

Difficult no

APs yes Possible/easy

yes Medium/high

Yes andno**

yes

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Fiber cable**requires access to multiple gateways


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60% 18% 11% 8.9% 1.5% 0.3%

Wireless Solutions for Enterprises

US Census Bureau: Statistics of U.S. Businesses: 2003

Current DAS

ProductsFAP

90% of the 4.8m enterprise buildings are less than 50,000 sqftsource: Unstrung Insider Vol. 5, No. 4, April 2006

Multiple FAP

Low cost DAS

RRH

One antenna enterprise multiple antennae enterprise

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Roadmap

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Roadmap Consequences

SON featuresimproved interference handling betweenmacro FAP

FAP FAP improved handover handling between

macro FAPFAP FAP

Local breakoutOutlook, Intranet, PABX integrationsimultaneous ringing, transfer of callscaller-id (e.g. office number)

RepeaterLTE L1-repeaters will compete with DAS and multiple femtosolutions

LTE voiceRel. 10 will provide HD-voice

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Femtocell interfaces

Source: Airvana

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Interference

Femtocells need to address the two scenarios:

FAP macro interference Minimize interference into macro cell

FAP FAP interference Reduce interference to get:

Enough throughput Minimum guaranteed data rate

Requires a clear spectrum strategy(shared or separate frequencies)

Requires sophisticated SON featuresRequires optimization on a per UE basisRequires short term configurations

(monthsweeksdayshoursminutescalls)

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Femto and WiFi Handover

Femtocells need to address the three scenarios:

FAP > macro handoverLess of a problem

macro > FAP handoverMacro may have many neighbors

FAP > FAP handoverMay need some knowledge about enterprise subnets

WiFi AP need to be supported by operators!

otherwise no handover to/from macrorequires secured links to HnB Gateways risky; especially when multi-operator configurations

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Backhaul for femtocellsWireless

Standard

Max data

rate

DSL (max)

(typical)

Cable (max)

(typical)

HSPAdownlink

14 Mb/s 24 Mb/s1.5 Mb/s - 6Mb/s

42 Mb/s 171 Mb/s1.5 Mb/s

HSPA uplink 5.8 Mb/s 3.3 Mb/s384 kb/s 768kb/s

30 Mb/s 122 Mb/s256 kb/s

HSPA+downlink

42 Mb/s 24 Mb/s1.5 Mb/s - 6Mb/s

42 Mb/s 171 Mb/s1.5 Mb/s

HSPA+ uplink 11 Mb/s 3.3 Mb/s384 kb/s 768kb/s

30 Mb/s 122 Mb/s256 kb/s

LTE downlink(20 MHz, 2x2)

150 Mb/s 24 Mb/s1.5 Mb/s - 6Mb/s

42 Mb/s 171 Mb/s1.5 Mb/s

LTE uplink(20 MHz, 2x2)

75 Mb/s 3.3 Mb/s384 kb/s 768kb/s

30 Mb/s 122 Mb/s256 kb/s

Standard ADSL2+ DOCSIS 2.0/3.0

For most of the DSL and cable modems up- and downlink are the bottlenecks!

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What will change with LTE?

LTE is IP based easier transitionno more soft handoff voice as VOIPnew applications (HD-voice, video calling)potentially more users per femtoflat architecture less interfacesmore SON features dynamic configurationneed to implement voice (release 10)multi-mode femtos (LTE&UMTS)MIMO (what MIMO is needed for what indoors?)IPV6 will be neededmore frequency bands;

bands no more technology specific (2G, 3G, 4G)Scheinert Telecom


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Capacity issues in DAS Systems

assumption: 100% traffic increase per year

in 5 years traffic will be 32 fold!if one BTS has 10 antennae; in 5 years each antennahas to carry 3x the capacity as of todays 10 antennaeBTS.

Cells will have a lower number of antennas(capacity limited)more carriers per cell neededat some point multiple antennae may not makesense anymore (if a cell has 2 antennae or less)

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Cost Comparison for Enterprises

Example: 8 antennae enterprise

System Equipment Installation BTS Core Network total

Rep-DAS $23,000 $25,000 $0 no $48,000

Femto-DAS-1

$18,000 $20,000 $3,000 $1,000 $42,000

Femto-DAS-2

$8,000 $0 $3,000 $1,000 $12,000

BTS-RRH

$1,000 $10,000 $13,000 $1,000 $25,000

Femtos $0 $0 $24,000 $1,000 $25,000

Femtos/controller

$5,000 $0 $24,000 $1,000 $30,000

APs $5,000 $0 $4,800 no $9,800

Assumptions: femto: $3,000; AP: $600; RRH: $1,000 single operator; controller: $5,000

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Cost Comparison for Enterprises



Rep-DAS $23,000 $25,000 $0 no $48,000

Femto-DAS-1

$18,000 $20,000 $3,000 $1,000 $42,000

Femto-DAS-2

$8,000 $0 $3,000 $1,000 $12,000

BTS-RRH

$1,000 $10,000 $13,000 $1,000 $25,000

Femtos $0 $0 $24,000 $1,000 $25,000

Femtos/controller

$5,000 $0 $24,000 $1,000 $30,000

APs $5,000 $0 $4,800 no $9,800

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Assumptions: femto: $3,000; AP: $600; RRH: $1,000 single operator; controller: $5,000


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Cost Comparison for Enterprises II



Rep-DAS $23,000 $25,000 $0 no $48,000

Femto-DAS-1

$18,000 $20,000 $500 $1,000 $39,500

Femto-DAS-2

$8,000 $0 $500 $1,000 $9,500

BTS-RRH

$1,000 $10,000 $9,000 $1,000 $21,000

Femtos $0 $0 $4,000 $1,000 $5,000

Femtos/controller

$5,000 $0 $4,000 $1,000 $10,000

APs $5,000 $0 $4,800 no $9,800

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Assumptions: femto: $500; AP: $600; RRH: $500 single operator; controller: $5,000


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Cost Comparison for Enterprises II



Rep-DAS $23,000 $25,000 $0 no $48,000

Femto-DAS-1

$18,000 $20,000 $500 $1,000 $39,500

Femto-DAS-2

$8,000 $0 $500 $1,000 $9,500

BTS-RRH

$1,000 $10,000 $9,000 $1,000 $21,000

Femtos $0 $0 $4,000 $1,000 $5,000

Femtos/controller

$5,000 $0 $4,000 $1,000 $10,000

APs $5,000 $0 $4,800 no $9,800

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Assumptions: femto: $500; AP: $600; RRH: $500 single operator; controller: $5,000


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Outlook

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Some additional thoughts:

Femto owned by enterprise no cost for operatorOne femto serving multiple operators

simplifies indoor coverage (1 femto for coverage)aggregates traffic of multiple operators

Operators may pay femtocell owners for trafficpublic femtos (e.g. bars, restaurants) if quality requirements are met (e.g. QoS backhaul)

The future is waiting..

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Future for DAS in SME?Other aspects:

LTE L1-repeater will compete with DAS systems,eliminating even the cabling.

RRH are competing with DAS solutions; will be evenmore attractive once fiber is common in enterprises.

Multiple femto configurations will compete with DASsolutions; especially when capacity might be an issue.

Capacity of DAS solutions are dependent on availabilityof:

high capacity femtos (32 users or more)multiple carrier femto cells (2 or more femtos per cell)

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Future for DAS in public venues?

DAS for Public venues & large enterprises:

full band supportmultiple bands (400 MHz 3.5 GHz)wireless standard agnosticmulti-operator configurationssupport for > 20 BTS per DASsupport MIMO configurationsGoing back to passive DAS?

one band from 400 MHz 3.5 GHz

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and enterprise femtos?

Multiple femtocells may or may not be the solution foran enterprise:

Need to minimize interference between femtocelland macrocell (other frequencies, SON-features)

Need to minimize interference between femtocells(Controller, other frequencies, SON features)

Optimize handover between cellsNeed for multi-carrier configuration per cell

Femtos need to be more intelligent (SON features) and/or acontroller for interference and handover management may be needed

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Thank you

www.scheinerttelecom.com

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In-Building Wireless Solution and Capacity Offload in 3G and LTE-V1.0

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