Qualcomm Research a New Kind of Network Open Indoor Femtos for Both Indoor and Outdoor Coverage.v4.20120306[1]

7/29/2019 Qualcomm Research a New Kind of Network Open Indoor Femtos for Both Indoor and Outdoor Coverage.v4.20120306[1]

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A New Kind of Network: Open Indoor Femtosfor Both Indoor and Outdoor Coverage

FEBRUARY | 2011 CORPORATE R&D

2012 QUALCOMM Incorporated. All rights reserved.


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A New Network Deployment Model:Open Access Neighborhood Femtocells

2

LOW COST DEPLOYMENT

Minimal CapEx and OpEx

Leverages customer site

and backhaul

MACRONETWORK

EASY TO DEPLOY

Simple plug-n-play by

customer

HIGH CAPACITY

Capacity gains of 5x to 20x

compared to macro-only

deployment


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Private Femto Vs. Neighborhood Femto

Private Femtocells forIndoor Coverage

Coverage restricted indoors

Dedicated or co-channel

spectrum

Using customers backhaul

Enhanced Indoor Coverageand Capacity

Neighborhood Femtocellsfor Indoor and Outdoor

Coverage Coverage extending outdoors

to serve neighborhood

Dedicated spectrum

Using customers backhaul for

open accessHigh Capacity Offload &

Large Area Coverage

Requires SON, Mobility and Interference Management


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Neighborhood Femtos Use Industry StandardFemto Architecture

Integrated Femto +

Broadband Modem

Macro RAN

HNB-GWIuh

Iu

3G Devices

Internet

Femto

MobileCN

Broadband

Modem

Iu

Fully StandardizedArchitecture

Mature eco-system following

Scalability for large number of

femtocells

Compatible with legacy macro/femto networks and mobiles


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Neighborhood Femtos Capacity SimulationAssumptions

Red: 2 story bldgBlue: 3 story bldg

Green: 4 story bldgCyan: 5 story bldg

Yellow: 6 story bldg

Dense-Urban Area

(Simulation with Apartment Buildings)

Parameter Value

City Area 100 km2

Macrocell ISD 500m

Area per Macrocell ~72000 sq m

Population 2 Million

Number of Dwellings 1 Million Black star: FemtocellCircle: Mobile

Blue circle: Macrocell

meter

Notes:a) Femtos are randomly dropped in a apartment statistically

independent of other femto locations

b) At the most one femtocell is dropped in any apartment


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Neighborhood Femtos Provide SignificantCapacity Gains

0x

5x

10x

15x

20x

25x

0% 2% 4% 6% 8% 10%

CapacityGain

Femto Penetration

Median Capacity Gain

10% Capacity Gain

Notes:

Gains shown are median down link throughputs relative to macro baseline with same amount of spectrum 48 active mobiles per macrocell

Femto penetration is percentage of total apartments with a femtocell

Downlink Throughput Gains Relative to Macro Only Deployment

Even further capacity improvements can be achieved with higherdensity of femtocells and UEs


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Neighborhood Femto is the lowest cost option in termsof total expense over 5 years to provide same capacity

Capacity Upgrade Options

Neighborhood Femtowith 5 MHz

UMTS Macro with 5 MHz LTE Macro with 20MHz

Model AssumptionsDense Urban

Area: 100 sqkm

20,000 Pops/sqkm

Macro Sites: 462

Traffic Assumptions

Subs: 134,000

MOU per Month: 200

MB per Month : 444 (Year 2012) to

2091 (Year 2016)

Economic AnalysisNeighborhood Femto as a Replacement to Adding Macro Carrier


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Main Considerations for Mobility Management forNeighborhood Femtos

Both idle and active mobility need to be supported for legacy mobiles

Key Issues:

Target cell discovery for handover

Preventing PSC confusion for femto-femto handover

Battery life impact due to idle mobility

Femto to Femto

Femto carrier

Overlay Macro carrier


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Self Healing Enables Dynamic Adaptation toChanges in Network Topology

Neighborhood femto network ishighly dynamic

Some femtos powered off

New femtos added

Femto location change

Self-healing capabilities are required toadapt to these changes

Femtos constantly monitor RF environmentthrough

Network listen measurements

Mobile measurement reports

Femtos adjust power and mobility

parameters accordingly

Power off

Location change

New femto


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Dynamic Power Calibration is Essential to MitigatePilot Pollution

High femto penetration withoutinterference management maylead to pilot pollution

Requires dynamic power calibrationto optimize each femtos coverage

Some femtos

reduce power

Without Interference Management Downlink Power Calibration

Q l O th Ai D N t k


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Qualcomm Over-the-Air Demo Network 7 femtocells located inside buildings within QC campus

Femtocells use QC FSM chipset and connect to existing ethernet ports

Operate at max power of 20dBm on a dedicated channel

Continuous coverage

High throughput

Excellent voice quality


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Common Multi-mode platform for all segments Residential through Metro

Highest level of integration enabling best in class

size, power and performance

Systems approach to chipset design

BB & RF optimized for dense deployment

Optimized for UltraSON Interference &

mobility management

Powerful RF subsystem

Secure boot and execution environment

FSM chipset enabling Scalable & Mature Small cellsresidential, enterprise, metro

Commercially available

Advanced trials with Tier 1 operators

Strong & growing ecosystem of partners

FSM9xxx


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THANK YOU

2012 QUALCOMM Incorporated. All rights reserved. QUALCOMM is registered

trademark of Qualcomm Incorporated.

Qualcomm Incorporated, 5775 Morehouse Dr, San Diego CA, 92121-1714

For more information about Femtocell research please visit:www.qualcomm.com/about/research/projects/femtocells/
http://www.qualcomm.com/about/research/projects/femtocells/http://www.qualcomm.com/about/research/projects/femtocells/

Documents

Qualcomm Research a New Kind of Network Open Indoor Femtos for Both Indoor and Outdoor Coverage.v4.20120306[1]