huawei lte rnp introduction1

HUAWEI TECHNOLOGIES Co., Ltd.

www.huawei.com

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


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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 budget Capacity dimensioning Site numbers/configuration Cell radius in each morphology Network 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 search Neighbor cell configuration PCI, TA planning Cell parameters configuration Algorithm configuration

NominalPlanning

Site location/ RF parameters configurations Search ring specifications prediction & Simulation Cluster 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

z Benefit: No more antenna installation space

z Risk: Additional diplexers cause insertion

loss Can not adjust azimuth/tilt

independently

z Recommendation: Wide band or multi band Same gain and beam width RET for SON High front-to-back ratio

z Benefit: Saving feeder cost

z Risk: High feeder loss in 2.6GHz. Additional loss caused by

additional diplexers/TMAs Negative impact on 2/3G

coverage

z Recommendation: RRU installed near to antenna Thicker 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 12 and UL SISO 11 in the first stage

Impalement DL MIMO 22 and UL MIMO 12 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:z Network dimensioning in different design types for different application scenarios

z Independent calculation or inheriting of calculation results among modules

z Network dimensioning in multiple cities and networking scenarios simultaneously

z 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:

GIS Antenna model Network element management Service model management Propagation model tuning & mngt.

Coverage Prediction: Path loss calculation Polygon operation Coverage plot generation Point analysis Monte Carlo simulation

LTE Specific Planning: PCI planning Neighbor list planning Frequency planning

Benefitz Accurate predictionz Easy operation and friendly interfacez Saving HR cost due to higher planning efficiency. z Lower technical level requirement by Professional functions


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LTE RNP Overview

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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

MorphologySectorizationBandwidth

MC Parameters

snapshot numbers Schedule Strategy

Cell Parameters Carrier Frequency

.

Input

Cell Average Throughput

Output

Inputs & Outputs of LTE Dimensioning (1/3)


GSM

z Hard blocking

z Capacity --- hardware dependant

z Single service

z Capacity dimensioning ---ErlangB

z Cell load : traffic per channel

LTE

z Soft blocking

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

z Multi services (VoIP&PS)

z Capacity dimensioning ---Monte Carlo

z Cell load : RB (both DL and UL)

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


UMTS LTE

z Soft blocking

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

z Capacity dimensioning ---curve formula

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

z Soft blocking

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

z Capacity dimensioning ---Monte Carlo Simulation

z 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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Copyright2008 Huawei Technologies Co., Ltd. All Rights Reserved. The information contained in this document is for reference purpose only, and is subject to

change or withdrawal according to specific customer requirements and conditions.

huawei lte rnp introduction1

Documents

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lte rnp challenges

lte coverage

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lte frequency

lte capability