LTE RNP Introduction1

HUAWEI TECHNOLOGIES Co., Ltd.

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HUAWEI Confidential

Huawei LTE RNP Introduction

HUAWEI TECHNOLOGIES Co., Ltd. Page 2HUAWEI Confidential

1

LTE RNP Challenges and Solutions

LTE RNP Dimensioning Introduction3

LTE RNP Overview

2

Agenda


0 3 6 912 15 18 21 24 27 30 33 36 39 42 45 48

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Number of Sites

0 3 6 912 15 18 21 24 27 30 33 36 39 42 45 48

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2030

4050

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Number of Sites

Mature Network Optimization after commercial launch

Launch

Pre-LaunchRadio Optimization LTE Radio Network

Planning

2G/3G Resources

What challenges that operators are facing in LTE RNP?

LTE network life cycle

RNP is the first and important step in the LTE network life cycle.


Huawei Radio Network Planning Main Steps

Detailed Planning

Inputs: Coverage, Capacity & Service Requirement

Outputs: Calculated eNodeBcoverage radius and site numbers based on capacity calculation

Inputs: Calculated coverage radius, digital map and subscriber distribution information

Outputs: Preliminary eNodeB numbers

Inputs: Coverage target and site survey result

Outputs: Actual site location and engineering parameters

Estimation

Preplanning


The operator provides:Naming conventionsExisting sites information

Preparation

Network DeploymentDetailed Planning

Coverage area (Dense urban, Urban, Suburban )Quality objective (QoS criteria)Capacity requirement (Subscriber, traffic model)Link budget parameters (Penetration loss, Propagation model)

Agreement achieved bythe operatorand Huawei

Link budgetCapacity dimensioningSite numbers/configurationCell radius in each morphologyNetwork development solution

Huawei deliver

The output of dimensioning is important criteria toassess RNP solution

Background Interference Test (optional)Propagation model tuning (optional)

Site survey/candidate site searchNeighbor cell configurationPCI, TA planningCell parameters configurationAlgorithm configuration

NominalPlanning

Site location/ RF parameters configurationsSearch ring specificationsprediction & SimulationCluster definition for project management

Detail LTE Radio Network Planning


• What are the LTE coverage and capacity?• How good is LTE comparing with 2G/3G? • How many LTE sites should be deployed?

LTE Capability

???

How to guarantee the network quality by RNP?

Operators Facing Challenges in LTE RNP

• LTE system reuses legacy facilities.• Cost & risk balancing of co-antenna/feeder. • Complicated indoor coverage planning.

Reuse & Indoor

• Risk of negative impact to current 2/3G network caused by LTE.

• Need solution to avoid interference.• Difficult to do LTE frequency planning.

LTE Interference• Long time spent on LTE network planning.• Lots of human resource spent on RNP.• High professional level requirement to RNP

engineer.

RNP Engineering

How to reduce cost and human resource by RNP?


1



LTE RNP Overview

2

Agenda


Huawei RNP: Your LTE Network Tailor

Huawei elaborate RNP concerns all challenges that operator faces

LTE Capability• LTE Coverage & Capacity• Performance Enhancement

Reuse & Indoor• Co-antenna/feeder• Indoor analysis

RNP Engineering• Professional RNP Tool• RF Expert Support

LTE Interference• Frequency Planning• Guard Band Recommendation

Huawei RNP


Huawei LTE Capability Analysis

Reuse & IndoorRNP Engineering

LTE Interference

Huawei RNP

LTE Capability

LTE Capability

• Huawei achieves LTE peak rate 173Mbps in downlink.

• Further coverage and higher capacity than 2G/3G.

• Huawei LTE key features brings even better performance.


LTE Reuse Facilities Analysis (1/5)

Reuse FacilitiesRNP Engineering

LTE Interference

Huawei RNP

LTE CapabilityReuse Facilities• Additional feeder loss caused by higher

frequency will impact LTE network.

• Huawei provides the analysis for co-antenna/feeder scenarios.

• Reusing current DAS will not support MIMO.


Co-Antenna/Feeder Analysis (2/5)

Co-antenna/feeder with 2/3G systemCo-antenna Analysis Co-feeder Analysis

Benefit:No more antenna installation space

Risk:Additional diplexers cause insertion lossCan not adjust azimuth/tilt independently

Recommendation:Wide band or multi bandSame gain and beam widthRET for SONHigh front-to-back ratio

Benefit:Saving feeder cost

Risk:High feeder loss in 2.6GHz. Additional loss caused by additional diplexers/TMAsNegative impact on 2/3G coverage

Recommendation:RRU installed near to antennaThicker feeder (Optional)


DCS 1800MHz

DCS1800MHz

LTE2600MHz

TMA STMA

RCU

RCU

LTE2600MHz

DCS1800MHz

RCU

SBT

RCU

☺ Saving antenna space

No independent network optimization

Need one more set of feeder

Co-antenna Solution between LTE 2.6G with DCS1800 (3/5)


DCS 1800MHz

☺ Saving feeder && independent network optimization

Diplexer cost && extra antenna space and engineer

Co-feeder Solution between LTE 2.6G with DCS1800 (4/5)

DCS 1800MHz

LTE2600MHz

Diplexer Diplexer

DiplexerDiplexer


Reusing Legacy DAS (5/5)

• High frequency (2.6GHz) caused additional feeder and insertion loss

• legacy DAS structure is difficult to implement MIMO technology.

• Negative impact for the coverage planning

Challenges

Solution

Suggestion

• Higher transmit power compensate feeder and insertion loss

• Implement DL SIMO 1×2 and UL SISO 1×1 in the first stage

• Impalement DL MIMO 2×2 and UL MIMO 1×2 when multi antenna DAS is ready in following stages

• Directly construct multi antenna DAS to support MIMO

• Select feeder and elements with less loss in high frequency (Optional)


LTE Interference Consideration


LTE Interference

Huawei RNP

LTE CapabilityLTE Interference• LTE performance is strongly impacted by the

frequency planning.

• Huawei compares the traditional frequency planning methods.

• SFR is recommended for LTE.

• Huawei analyzes the interference between LTE and 2/3G system and provides recommendations to avoid interference.


LTE RNP Engineering (1/4)


LTE Interference

Huawei RNP

LTE Capability

RNP Engineering• Huawei uses professional RNP tools for

network dimensioning and simulation.

• Professional tools brings more accurate planning result, higher working efficiency and lower human resource cost.

• Huawei has over 1800 RF expert and abundant global commercial network RNP & RNO experiences.


LTE RND Dimensioning Tool (2/4)

RND tool is Supporting:Network dimensioning in different design types for different application scenarios

Independent calculation or inheriting of calculation results among modules

Network dimensioning in multiple cities and networking scenarios simultaneously

Importing/exporting parameters and calculation results, and importing the parameters and calculation results into the RNP output template.

RND is the LTE dimensioning tool developed by Huawei


U-Net: Professional LTE RNP Tool (3/4)

What is U-Net?

U-Net is the professional LTE simulation tool developed by Huawei.

U-Net is based on the abundant global RNP experiences.


U-Net: Powerful and Saving (4/4)

What can U-Net do?

Function• Network modeling:

GISAntenna modelNetwork element managementService model managementPropagation model tuning & mngt.

• Coverage Prediction:Path loss calculationPolygon operationCoverage plot generationPoint analysisMonte Carlo simulation

• LTE Specific Planning:PCI planningNeighbor list planningFrequency planning

BenefitAccurate predictionEasy operation and friendly interfaceSaving HR cost due to higher planning efficiency. Lower technical level requirement by Professional functions


1



LTE RNP Overview

2

Agenda

HUAWEI TECHNOLOGIES Co., Ltd. Page 21HUAWEI Confidential HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

UE Transmit Power(e.g. 23dBm)

UE Antenna Gain

eNodeB Antenna Gain

Other Gain Slow fading margin

Interference margin

Body Loss

Cable Loss

Penetration Loss

Path Loss

UPLINK BUDGET

eNodeB reception sensitivity(e.g. -119dBm)

Antenna Gain

Other Gain

Margin

Loss

Path Loss

Cable Loss

Antenna Gain

eNodeBSensitivity Penetration

Loss

LTE Link Budget Procedure – Uplink(1/3)


DOWNLINK BUDGET

Antenna Gain

Other Gain

Margin

Loss

eNodeB Transmit Power (e.g. 46dBm)

eNodeB Antenna Gain

UE Antenna Gain

Other Gain Slow fading margin

Interference margin

Body Loss

Cable Loss

Penetration Loss

Path Loss

UE reception sensitivity(e.g. -109dBm)

Path Loss

Cable Loss

Antenna Gain

eNodeBSensitivity Penetration

Loss

LTE Link Budget Procedure – Downlink(2/3)


5

Single Service SensitivityComposite Rx SensitivityRx Sensitivity4

PA, VA, …ePA, eVA, …Channel Model3

Fast Fading MarginNo Fast Fading MarginPower Control2

Soft handoverHard handoverHandover1

UMTSLTEDifferenceSN

Differences b/w UMTS and LTE (3/3)


Scenario Parameters

－Morphology－Sectorization－Bandwidth……………

MC Parameters

－ snapshot numbers－ Schedule Strategy………

Cell Parameters－ Carrier Frequency

……….

Input

Cell Average Throughput

Output

Inputs & Outputs of LTE Dimensioning (1/3)


GSM

Hard blocking

Capacity --- hardware dependant

Single service

Capacity dimensioning ---ErlangB

Cell load : traffic per channel

LTE

Soft blocking

Capacity ---many factors(bandwidth, eNodeB power, antenna configuration…)

Multi services (VoIP&PS)

Capacity dimensioning ---Monte Carlo

Cell load : RB (both DL and UL)

Capacity Dimensioning Differences between GSM and LTE (2/3)


UMTS LTE

Soft blocking

Capacity --- many factors(Cell load, service type, traffic model, scenario…)

Capacity dimensioning ---curve formula

Cell load : Interference (UL) & Power (DL)

Soft blocking

Capacity ---many factors(bandwidth, eNodeB power, antenna configuration…)

Capacity dimensioning ---Monte Carlo Simulation

Cell load : RB (both DL and UL)

Capacity Dimensioning Differences between UMTS and LTE (3/3)


MSC/SGSN/GGSN

BSC RNC

BTS BTS NodeB NodeB

2G/3G: Legacy Architecture2G/3G: Legacy Architecture LTE: Flat ArchitectureLTE: Flat Architecture

Network Architecture of LTE (1/4)


GTPU

UDP

IP

Data Link Layer

Physical Layer

SCTP

IP

Data Link Layer

Physical Layer

Control Plane User Plane

GTPU

UDP

IP

Data Link Layer

Physical Layer

SCTP

IP

Data Link Layer

Physical Layer

Control Plane User Plane

S1 interface Throughput


Control Plane

Throughput

Control Plane

ThroughputUser Plane

Throughput

User Plane

Throughput

T_control planeT_control plane T_user planeT_user plane



Control Plane

Throughput

Control Plane

ThroughputUser Plane

Throughput

User Plane

Throughput

T_control planeT_control plane T_user planeT_user plane

S1 Interface Overview (2/4)


CS TrafficVoice TrafficVP Traffic

GoS Requirements

SubscribersSubs per NodeB

PS TrafficPS64 ThroughputPS128 ThroughputPS384 Throughput

PS Retransmission

HSPA Traffic

CS Iub Bandwidth

PS Iub Bandwidth

Bandwidth for Traffic

HSPA Iub Bandwidth

Common Channel Bandwidth

Signalling Bandwidth

O&M Bandwidth

Iub Bandwidth

Input Iub Dimensioning Output


GoS Requirements


GoS Requirements




PS Retransmission


PS Retransmission

HSPA TrafficHSPA Traffic

CS Iub BandwidthCS Iub Bandwidth

PS Iub BandwidthPS Iub Bandwidth



HSPA Iub BandwidthHSPA Iub

Bandwidth



Signalling BandwidthSignalling Bandwidth

O&M BandwidthO&M Bandwidth

Iub BandwidthIub Bandwidth

Input Iub Dimensioning Output

SubscribersSubs per eNodeB

PS Traffic

PS Iub Bandwidth



Signalling Bandwidth

O&M Bandwidth

S1 Bandwidth

Input S1 Dimensioning OutputSubscribers

Subs per eNodeBSubscribers

Subs per eNodeB

PS Traffic

PS Iub BandwidthPS Iub Bandwidth





Signalling BandwidthSignalling Bandwidth

O&M BandwidthO&M Bandwidth

S1 BandwidthS1 Bandwidth

Input S1 Dimensioning Output

Comparison between S1 and Iub Bandwidth Calculation (3/4)


Factors influence X2 throughputThe handover frequency between eNodeBs

The duration time of handover

The average service rate and packet size per handover

Signalling overhead in control plane of X2 interface

Estimated to be 3% of S1 interface throughput

S1 Interface Throughput= 41.94 MbpsS1 Interface Throughput= 41.94 Mbps

3%3%

X2 Interface Throughput = 1.26 Mbps

X2 Interface Throughput = 1.26 Mbps

X2 Interface Throughput Dimensioning (4/4)

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Documents

LTE RNP Introduction1