ALU RF Methodology Femto Deployment_Sep2014_Ed1

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ENGINEERING RF METHODOLOGY for Femto DeploymentsAIS FEMTO networkSep 2014

1. Introduction

2. Product Overview

3. Femto Indoor RF Guidelines

AGENDA


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4. Femto Outdoor RF Guidelines

AGENDA

Item 1 | Introduction

Item 2 | Product Overview


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Item 3 | Femto Indoor RF Guidelines

Item 4 | Femto Outdoor RF Guidelines

INTRODUCTION

• Adding a Femto cell layer can be a solution to improve coverage quality and capacity

• Two carriers’ allocation strategies are possible

o Femto network deployed on 3G macro carrier

o Femto network deployed on a dedicated carrier


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The high level system architecture for small cell as defined by 3gpp

Small cell solution architecture


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AGENDA




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The Alcatel-Lucent 9362 enterprise cell v2.2 2100Mhz is designed to be located indoors for filling holes in coverage within building to improve network reach and increase capacity

Radio Characteristic

� Operation Band : 2100 Mhz (UMTS)

� Listening band

• 2100 Mhz (UMTS)

• 900/1800 GSM

Enterprise V2.2 2100 Mhz Small Cell with Integrated Antennas


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• 900/1800 GSM

� Capacity

• Pay as you grow capacity 16 ,24, 32 users

� Maximum bearer

• 21 Mb/s L1 HSDPA+ bearer

• 5.7 Mb/s L1 HSUPA bearer

�Maximum Transmission Power

• 100 mW output power (option increase to 250 mW with licensing)

� -2 dBi internal antenna

� Can use with power supply by PoE+ injector

Enterprise V2.2 2100 Mhz Small Cell with Integrated Antennas – Antenna Pattern


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The Alcatel-Lucent 9361 home cell askey v3 20 mW is a low power, high capacity wireless device designed to be located indoors for filling holes in coverage


� Operation Band : 2100 Mhz (UMTS)

� Listening band

• 2100 Mhz (UMTS)

• 900/1800 GSM

� Capacity

Home Cell ASKEY V3


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� Capacity

• 8 devices with each connection supporting a simultaneous voice call and data session

� Maximum bearer



� Maximum Transmission Power : 20 mW output power

� -2 dBi internal antenna

Home Cell ASKEY V3- Antenna Pattern


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The Alcatel-Lucent 9364 metro cell is more than extending coverage and capacity. It also enables the creation of new and innovative applications


�Operation Band : 2100 Mhz (UMTS)

�Capacity

• Pay as you grow capacity 16 ,24, 32 users


Metro Cell Outdoor V2 2100Mhz


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� Maximum bearer



� Power supply by PoE+ injector

� Support 2 external antenna with N-type Male

� Compact size 241x241x53 mm with 2kg weight

The Alcatel-Lucent 9764 LR MCO is the entire solution with all the parts assembled. It share a common look & fell as well as a simple installation


�Operation Band : 2100 Mhz (UMTS)

�Capacity

• Support up to 32 users

� Maximum Transmission Power : 1 W output power at

Light Radio Metro Cell Outdoor (MCO)


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� Maximum Transmission Power : 1 W output power at internal antenna connector

� Maximum bearer



�Flexible media connector :either Optical GE(1000Base-X) or Electrical GE(1000Base-T) using (SFP)

� Integrated two directional cross polarized antennas with a 8.5 dBi gain

� Compact size 350x 138x 124 mm with 4.5kg weight

LR MCO 1W - Antenna Pattern


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AGENDA




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Item 4 | Femto Outdoor RF Guideline

Small Cell RF deployment Process

• 3 Scenarios are considered:• Coverage only :

• Coverage is not ensured through the underlay Macro (indoor/outdoor)

• Small Cells are used to fill coverage holes

• Capacity only :

• Coverage is ensured through the underlay Macro (indoor/outdoor)

• Small Cells are used to offload the Macro and provide additional resources and/or improve the


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• Small Cells are used to offload the Macro and provide additional resources and/or improve the quality of experience

• Coverage and Capacity

• Coverage is not ensured through the underlay Macro (indoor/outdoor)

• The areas has a high user density or high foot fall.

• The process ensures that • Experience from more complex deployments is feedback to improve similar deployments in the future.

• Guidelines can by dynamically updated

SHUNTER

• Based on the input from the Customer, an initial classification is made between the different projects.

• The classification will rely on the number of Small Cells which are to deployed and on knowledge gained from already studied scenarios.


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• Three choices are offered:

• GREEN (couple of Small Cells)

• YELLOW (few Small Cells)

• RED (many Small Cells)

• In a second step, the number of users that can be supported using the Number of Small Cells for Coverage is to be calculated.

• In the case it is below the number of users in the Enterprise, then the case will be classified as

• GREEN if the number of Small Cells is between 1-2 (or home cell)

HOW TO ESTIMATE THE # OF SMALL CELLS?


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• GREEN if the number of Small Cells is between 1-2 (or home cell)

• YELLOW if the number of Small Cells is between 3 and 5 (5 being the number of PSC allowed for Small Cells)

• In any other cases, the classification will be RED

Classification - GREEN

• These are straight forward scenarios

• No RF expertise is required

• Profile should be configured by Maintenance team

• A GREEN classified Scenario can be moved to YELLOW following the initial Evaluation Phase or due to Performance Issues


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• It will rely on

• Profiles and Deployment Guidelines

Classification - YELLOW

• This is complex scenarios where RF Knowledge is needed

• RF Expertise is needed

• A GREEN classified Scenario can be moved to YELLOW following the initial Evaluation Phase or due to Performance Issues

• It will rely on


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• An analysis of the location

• Profiles and Deployment Guidelines

• Known cases

• Manual Planning can be done in case of Small Cell group

Classification - RED

• This is the most complex scenarios

• RF Expertise is strongly required

• A YELLOW classified Scenario can be moved to RED following the initial Evaluation Phase or due to Performance Issues

• It will rely on

• Deep analysis


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• Walk tests / Detailed site survey

• Simulations

• Optimization steps

• In the case KPIs target cannot be meet, an alternative solution is to be provided

Indoor RF design in shared carrier is driven by

Macro best server signal strength

• To perform a RF design it is mandatory to evaluate this, to ensure indoor layer must be above the highest macro RSCP value measured in indoor to ensure the dominance

RSSI of macro layer in indoor

Indoor Femto Cell Coverage design


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RSSI of macro layer in indoor

• In some cases generally for high floor levels, macro radio quality can be very poor as a high number of servers is detected, and it is very difficult to match good macro RF design over all floors and alos in outdoor

Indoor ENVIRONMENTS DESCRIPTION

Description

MoO Moderately Open Warehouse, Airport, Manufacturing

MiD Mildly DenseRetail, Office Space w/ approx 80%

cubes/20% hard-walled offices

MoD Moderately DenseOffice Space w/ approx 50% cubes/50% hard-

walled offices

Den DenseHospital, Office Space w/ approx 20%

cubes/80% hard-walled offices

Environment


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Indoor COVERAGE SCENARIO (Shared carrier)

Indoor

EnvironementFemto Power

Outodoor

Macro

RSCP = -50

Outodoor

Macro

RSCP = -60

Outodoor

Macro

RSCP = -70

Outodoor

Macro

RSCP = -80

Outodoor

Macro

RSCP = -90

Outodoor

Macro

RSCP = -100

1W (7 dBi) 30 m 55 m 101 m 188 m 347 m 642 m

250 mW 13 m 25 m 46 m 84 m 156 m 288 m

100 mW 10 m 19 m 36 m 66 m 122 m 226 m

20 mW 7 m 13 m 23 m 43 m 79 m 147 m

1W (7 dBi) 21 m 37 m 65 m 113 m 197 m 344 m

Moderately Open

1700-2100 Mhz bands


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1W (7 dBi) 21 m 37 m 65 m 113 m 197 m 344 m

250 mW 10 m 18 m 32 m 55 m 96 m 167 m

100 mW 8 m 14 m 25 m 44 m 77 m 134 m

20 mW 6 m 10 m 17 m 30 m 52 m 91 m

1W (7 dBi) 16 m 27 m 45 m 75 m 124 m 206 m

250 mW 8 m 14 m 23 m 39 m 64 m 106 m

100 mW 7 m 11 m 19 m 32 m 52 m 87 m

20 mW 5 m 8 m 13 m 22 m 37 m 61 m

1W (7 dBi) 13 m 21 m 33 m 53 m 84 m 134 m

250 mW 7 m 11 m 18 m 29 m 46 m 73 m

100 mW 6 m 9 m 15 m 24 m 38 m 61 m

20 mW 4 m 7 m 11 m 17 m 27 m 44 m

Midly Dense

Moderately Dense

Dense

Compare to the shared carrier solution, there is nomore neighboring and interference impact on outdoor network

The main challenge is to keep coverage inside the building avoiding outdoor UE to be able to connect to Femto network


Indoor COVERAGE SCENARIO (dedicated carrier)


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Whatever indoor or outdoor femto deployment, distance between femtodepends essentially on service requested, or on the capacity required in term of users/m2 which should be supported

• If limitation is only coverage then inter small cell distance should be 2 times cell radius required to support service requested at cell edge

Inter-Femto Cells distanceIndoor COVERAGE SCENARIO


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• If capacity is the most constraining criterion then femto density should be enough to support user desnity. In case for indoor, femto power should be 20 mW or 100 mW

• In indoor the minimum distance between small cells should be 10m, having a lower distance may be induce too high inter-fmeto cell interference

AGENDA




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Outdoor deployment 2 scenarios are possible

• Femto cells are deployed on a dedicated carrier never resued by macro-cell layer. There is no risk of interference, so no constraints

• Femto cells are deployed in the spot area, but the carrier should be re-used by the macro cell layer. A buffer zone should be applied in order to avoid macro-layer interfering small cells. To avoid potential interference,

Femto Outdoor deployment


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avoid macro-layer interfering small cells. To avoid potential interference, the channel can be re-used on macro cells whose RSCP received levelanywhere in small cell cluster respects

Macro-cell RSCP < Femto RSCP - 10

Shared Carrier Outdoor Femto deployment

• To avoid DL interference from macro-cells layers in shared carrier conditions, it is necessary to position outdoor femto cells in areas where macro cells RSCP is lower than below recommendation at Femto position to obtain at least 50 m Femto cell radius as best server

Femto Outdoor deployment


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Femto Outdoor radius VS Macro signal level

1 0 0

1 5 0

2 0 0

2 5 0

3 0 0

3 5 0

Met

roce

ll eq

uiva

lent

rad

ius

[m]

M a c ro IS D = 1 7 3 2 m

0 .2 5 W0 .5 W

1 W2 W

5 W

3 0

4 0

5 0

6 0

7 0

8 0

9 0

Met

roce

ll eq

uiva

lent

rad

ius

[m]

M a c ro IS D = 5 0 0 m

0 .2 5 W

0 .5 W

1 W2 W

5 W


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-9 5 -9 0 -8 5 -8 0 -7 5 -7 0 -6 5 -6 0 -5 5 -5 0 -4 50

5 0

1 0 0

M a x im u m m a c ro c e ll C P IC H R S C P a t m e t ro c e ll B S [d B m ]

Met

roce

ll eq

uiva

lent

rad

ius

[m]

-7 5 -7 0 -6 5 -6 0 -5 5 -5 0 -4 50

1 0

2 0

M a x im u m m a c ro c e ll C P IC H R S C P a t m e t ro c e ll B S [ d B m ]

Met

roce

ll eq

uiva

lent

rad

ius

[m]

� Deployment in low macro RSCP, or if this is not possible (e.g. in dense urban areas) higher transmit powers required to achieve good metro cell coverage areas.

2 LR MCO trial at AsiaTique for shared-carrier at good Macro signal scenario

LR MCO Trial case : Asiatique

9292


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9191

UE Measurement RSCP : AsiaTique Trial

Best RSCP Best RSCP –– without LR MCOwithout LR MCO Best RSCP Best RSCP –– with LR MCOwith LR MCO


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UE Measurement EcNo : AsiaTique Trial

Best Best EcEc/No /No –– Without LR MCOWithout LR MCO Best Best EcEc/No /No –– with LR MCOwith LR MCO


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The objective is to improve coverage on the road near Trisara resort . There is one Macro site nearby, but due to hilly terrain environment the macro signal is not able to serve on these 2 road area.

LR MCO mouth on pole with daisy chain is planned as solution for this case

LR MCO coverage on the road : Trisara Phuket


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LR MCO coverage on the road : Trisara PhuketRSCP Coverage prediction : 2.5D model


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LR MCO coverage on the road : Trisara Phuket


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ALU RF Methodology Femto Deployment_Sep2014_Ed1

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