r24km0-wcdma intro .pdf

8/10/2019 R24KM0-WCDMA INTRO .pdf

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REMOTEK CORPORATION

www.remotek.com.tw

R24KM0-WCDMA RepeaterIntroduction


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AgendaPRODUCT OVERVIEW

INTELLIGENT MODE

APPLICATION

OMT

ADVANTAGES

2

SILENT MODE

DONOR SIGNAL MEASUREMENT


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AgendaPRODUCT OVERVIEW

3

INTELLIGENT MODE

APPLICATION

OMT

ADVANTAGES


SILENT MODE


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Intelligent algorithm to prevent UL interference

Self-control to minimize interference towards

new rollout Node B

Silent Mode function

Self-oscillation

Support monitoring the RF parameters of the

donor signal which would make optimization and

troubleshooting of the repeater system become

easy.

Features

4


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Intelligent Mode Application OMT AdvantagesProduct Overview

R24KM0-WCDMA Technical Spec.

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Block Diagram

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Agenda

INTELLIGENT MODE

7

APPLICATION

OMT

ADVANTAGES


SILENT MODE

PRODUCT OVERVIEW


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Interference Repeater Implementation

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Thermal noise = K * T * B

K = 1.38 * 10-23 J/K

T = Room temperature (Kelvin)

B = Resolution bandwidth (Hz)

UL Noise Floor -108 (3G)

REPEATERNode B


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Interference Normal System

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REPEATERNode BNode B noise Floor = -105dBm

UL Gain = 85dB

Noise figure = 6dB

Cable Loss= -3dB

Donor Antenna = 10dBi

Node B

RPT

Node B Antenna = 17dBi

Cable Loss= -3dB

Repeater Noise Floor = -108dBm+85dB+6dB-3dB+10dBi-123dB+17dBi-3dB =-119dBm

Total Noise Floor = -119dBm+(-105dBm) = 1.26x10^-12mW + 3.16x10^-11mW =3.29x10^-11mW

= -104.84dBm

Total Increment -104.84dBm-(-105dBm)= 0.16dB


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Interference Noise Floor is High

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REPEATERNode BNode B noise Floor = -105dBm

UL Gain = 93dB

Noise figure = 5dB

Cable Loss= -3dB

Donor Antenna = 10dBi

Node B Antenna = 17dBi

Cable Loss= -3dB

Node BRPT

Repeater Noise Floor = -108dBm+85dB+6dB-3dB+10dBi-114dB+17dBi-3dB =-110dBm

Total Noise Floor = -110dBm+(-105dBm) = 1.00x10^-11mW + 3.16x10^-11mW = 4.16x10^-11mW

= -103.81dBm

Total Increment = -103.81dBm-(-105dBm)=1.19dB


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Application OMT AdvantagesIntelligent ModeProduct Overview

Interference to Existing Node B New Repeater

11

Node B

Coverage

Node BCoverage

NODE BNODE B

Repeater

coverage

Repeater

coverage

NODE B

Node B

Coverage

New

Repeatersite

The existing Node B site will have UL interference due to shorter distance

between Node B and repeaters and improper repeater commissioning. The

sensitivity and coverage of existing Node B will reduce by adding new

repeaters to nearby Node B site.

Repeater

coverage

Repeater

coverage

Repeatercoverage

Repeater

coverage


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Application OMT AdvantagesIntelligent ModeProduct Overview

With/Without Intelligent Mode

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Repeater

Without Intelligent Mode

Repeater

With Intelligent Mode

Intelligent

Circuit

Cannot make call

Can make call

Node b Coverage

Interference

B.T.S

Node B Coverage

B.T.S

No

Interference


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Agenda

SILENT MODE

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APPLICATION

OMT

ADVANTAGES


PRODUCT OVERVIEW

INTELLIENT MODE


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16

Node B

Repeaters noise floor = -116dBm








Amount ofRepeaters

Increment ofRepeaters Noise Floor

Total RepeatersNoise Floor

Total NoiseFloor in BTS

Increment ofBTSs Noise Floor

Status

Ref: Node B Noise Floor = -105dBm

1 0dB -116dBm -104.67dBm 0.33dB No Interference

2 3dB -113dBm -104.36dBm 0.64dB Low Interference

4 6dB -110dBm -103.81dBm 1.19dB Interference

8 9dB -107dBm -102.88dBm 2.12dB Interference

Total Noise Floor Without Silent Mode


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Total Noise Floor With Silent Mode

Amount ofRepeaters

Increment ofRepeaters Noise Floor

Total RepeatersNoise Floor

Total NoiseFloor in BTS

Increment ofBTSs Noise Floor

Status

1 0dB 0dBm -105dBm 0dB No repeater is active

2 0dB 0dBm -105dBm 0dB No repeater is active

4 0dB -116dBm -104.67dBm 0.33dB 1 repeater is active

8 3dB -113dBm -104.36dBm 0.64dB 2 repeaters are active

Ref: Node B Noise Floor = -105dBm

Node B

In Silent Mode

In Silent Mode

In Silent Mode


In Silent Mode

In Silent Mode

In Silent Mode



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UL RF INPUTSilent modeDetection

enable/disableUL PA

Silent Mode

Silent mode detection will always detect the UL RF input.

When there are no subscribers making calls, the silent mode will disable the UL

PA, when there are subscribers making calls, silent mode will enable the UL PA.

Designed with Silent mode which can automatically deactivate UL PA when

there are no subscribers making calls, so the UL noise floor interference

towards the BTS can be avoided.

Silent Mode


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Operator A WCDMA

Operator B GSM

Enable UL PA

UL PA keep on

silent modeDesigned for

Operator A WCDMA

Since the repeater was designed for operator A with WCDMA system, when the subscriber

of operator A with WCDMA System were making a call, the repeater will activate the UL

PA automatically.

When there are other signals go to the repeater, the repeater wont activate the UL PA,

because the repeater was designed only for operator A with WCDMA system according to

the operator A frequency.

Operator A GSM

Operator B WCDMA

Silent Mode


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Ex. Walkie-talkie

UL PA keep on

silent mode

Designed for

Operator A WCDMA

Silent Mode can detect the harmonic signal that goes to the repeater, so even if there is a

harmonic signal which is causing interference to the repeater frequency, the repeater will

not turn on the UL PA.

Silent Mode also can detect the interference which goes to the repeater that we dont

know where it is from, with the Silent Mode feature the repeater will not enable the UL PA

Unknown Interference

Harmonic Frequency


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Agenda


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APPLICATION

OMT

ADVANTAGES

SILENT MODE

PRODUCT OVERVIEW



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Donor Signal Measurement

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Donor Signal strength can be measured

Donor Signal Quality can be measured

Donor Signal can either be 2G or 3G

Neighbors Information can also be measured

Potential Co-Channel and Adjacent Channel problem

can be identified.


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Donor Signal Parameters User Interface

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Benefits

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Optimization

The most appropriate location and direction for the donor antenna

can be find out with easiness, and optimization for the Repeatersystem becomes easy.

Troubleshooting

The faulty problem can be located easily which would enhance theTroubleshooting efficiency

MaintenanceRepeater Status can be maintained even easier, since the comparisonof the donor signal and the service signal can be made morespecifically.


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Cost Saving

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No additional equipment needs to be purchased

It may take some time to arrange the trip to site for troubleshooting.

Trip to site for troubleshooting would cost around USD200.

The problem may not always be coming from repeater, and the trip to the

site may be in vain.

The donor signal measurement provide the means to rule out some of the

situations that when the problems are not coming from the repeater.


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Agenda

APPLICATION

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OMT

ADVANTAGES

SILENT MODE

PRODUCT OVERVIEW




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Applications

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In-building

Rural area

Tunnel

Highway

Commercial Building

Rural Area

Tunnel


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Applications

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Advantages Low cost

Simple & easy construction

Resolve customers

complaint

Optimal solution for areas

with low traffic

Low maintenanceRepeater

Coverage Antenna

Donor Antenna

Base

Station

Donor Antenna

Coverage

Antenna

Repeater


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Applications

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Advantages Low cost

Fast & easy

implementation

Enhance operators

reputation

Reduce drop call rate

Donor AntennaService

Antenna

inside

tunnel


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Applications

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Advantages Low cost

Fast & easyimplementation

Reduce drop call rate &

better handover

Optimal solution for

resolving coverage holes

Coverage

of BTS (A)

BTS (A)

BTS (B)

Coverage

of BTS (B)


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ApplicationIntelligent Mode AdvantagesOMTProduct Overview

Remote Monitoring & Control

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3. Repeater configurationcan be remotely changedor viewed.

1. Current status of the repeater can be remotelymonitored.

2. Any alarm will be reported back to OMT(Control Center).

4. Search Donor Signal RFParameters


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Remote Monitoring Structure Concept

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GSM/WCDMA network

Computerw/OMTsoftware

Modem

Repeater withModem


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Agenda

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APPLICATION

OMT

SILENT MODE

PRODUCT OVERVIEW



ADVANTAGES


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THANK YOU

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r24km0-wcdma intro .pdf

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