sdr basics and network planning v1.1_091207

7/31/2019 SDR Basics and Network Planning V1.1_091207

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SDR Basics and Network PlanningV1.0

Suitable for Staff with P&O Skill Certificate IV or Lower

Issued by GSM Network P & O Dept

GSMSpecial Subject Training Material


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Version introduction

Version Date Writer Assessor Translator Amendment

RecordsV1.0 2009-06-22 Chen Ni Zheng Hao Lu Yan No

V1.1 2009-11-24 Chen Ni Zheng Hao Lu Yan The updated information

includes the equipment

names of SDR base stations,

the technical parameters,

the bandwidth apertures

supported by RU. Thetechnical parameters and

the relevant apertures are

suitable for R8.2 version.


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Outline:

ZXSDR equipment family

ZXSDR networking and cascade

objective

ZXSDR maximum configuration

ZXSDRs RU/RRU technical criterion

Differences between STSR and

OTSR

OTSR networking in two waysZXSDR

I. ZXSDR seriesequipment introduction

II. STSR andOTSR networking

III. ZXSDRequipment p & o

Influences over o & p

IV. ZXSDRequipmentapplications

High speed

railway areas

OTSR networking

Link budget

Capacity planning

Channel planning

Frequency planning

Indoor coverage

Outdoor coverage


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I. ZXSDR series equipment introduction


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1. What is SDR

SDRSoftware Defined Radio

The same radio frequency channel module can be defined as

different modes by software. For example, it can be defined as

GSM single mode, UMTS single mode, or G/U dual mode.

ZXSDR series products make SDR come true


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2.What are the technological qualities of SDR?

A multi-mode, multi-frequencyband, unified hardware

platform

It is easier to realize the developmentfrom 2G,3G to 4G

A platform structure of

separated baseband and radiofrequency

The separated radio frequency makes it

possible to set up scattered basestations, and more flexible networking.

A baseband processing unit

built on u TCA structure

Networks share all the boards except the

baseband processing board.

A radio frequency unit with

broadband multi-carrier

power amplifier

Networks of the same band can be

converged only with a software definition;

while those of different band can be

converged only by adding a RU module.


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RU02

B8200

RU02A

RSU60

Outdoor macro BTS

BS8900

R8860 R8860

RU60

B8200+R8860 toform a scattered

base station

TCA structure, 2U high.

Processing capacity of each UBPG(12

TRX carrier frequency)

No more than 5 baseband processing

boards for each 1B8200

Compatible with G/U dual mode

36TRX for a single cabinet

Maximum configuration: S12/12/12 or

S6/6/6/6/6/6

Flexible deployment, compatible with G/U

dual mode

For a single piece of equipment it can be expanded from

36TRX to 72TRX.

S12/12/12 or S6/6/6/6/6/6 maximum

configuration for a single station without an

additional piece of equipment

S20/20/20 or S10/10/10/10/10/10 is the maximum

configuration for a single station with an additional piece of

equipment. (At present, the additional piece of equipment is not

available, the period of validity of the aperture expires on 31st,

Dec, 2009.)

Compatible with G/U dual mode

Indoor macro BTS BS8800

3. What are ZXSDR series equipment? How aboutthe maximum configuration?

GU dual mode multi-carrier

A single R8860 configuration is 1-6 GSM

carrier frequency or 1-4 UMTS carrier

frequency. The maximum configuration is

4G+1U. (At present, 2U configuration is not

supported by R8.2)

Outdoor micro BTSBS8906 G060

A one-piece cabinet

only supports 1 RSU60, or

(together with) more than

one R8860; A divided

cabinet only supports the

configuration of R8860;

Maximum configuration:

S12/12/12 or S6/6/6/6/6/6

BS8906 G060 is a

single mode GSM product.


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4. What are the ways of networking between BBUand RU/RRU?

A single station for no more than 6 cells

Support 3 networking ways:

Star topology, 12 light interfaces for 12 RU/RRU

Chain topology, RRU for no more than 4 cascade

tiles; Mixed topology, for 48 RRU at most


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5. What is the maximum distance for RRU cascade?What is the maximum number of cascade tiles?

For chain topology, the maximum number of cascade tiles is4

The maximum distance between BBU and the last RRU is

10km

R8600 R8600 R8600 R8600

10km


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6.How to realize RRU cascade synchronization?

The system can automatically calculate the delay between BBU and RRU,

and make a compensation for it. Since BBU will measure the delay of each

RRU and compensate for it, RRU cascade synchronization can be realized.


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7. What is the maximum configuration for ZXSDRseries equipment?

Equipment types

Maximum carrier

frequency for a

single station

Maximum configuration for a single station

BS8800

Main piece +

additional piece (At

present, the additional

piece of equipment is

not available, the

period of validity of

the aperture expires on

31st, Dec, 2009)

60 S20/20/20 or S10/10/10/10/10/10

Main piece 36 S12/12/12 or S6/6/6/6/6/6

BS8900 36 S12/12/12 or S6/6/6/6/6/6

BS8906 G060 60 S20/20/20 or S10/10/10/10/10/10

BS8700 60 S20/20/20 or S10/10/10/10/10/10

It is suggested that S12/12/12 or S6/6/6/6/6/6 should be the maximum for a

single station.

If the configuration for a cell is no more than 12TRX, one antenna and

feeder

is needed.

If it is more than 12TRX, there are two possible solutions:

1. Add one antenna and feeder (recommended)

2. Add one bridge (3dB loss, not recommended!)


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8. What is the baseband unit for ZXSDR equipment?

Power modulePM Provide power for each board;

Default setting is 1, and 1+1 backup is optional.

Site alarmSA

It integrates the function of environment monitor and

control and that of E1interface. It provides 8 node ports

monitors, 6 in and 2 out, and 8 E1/T1 interfaces;

1 fixed configuration

Control and clock and switch boardCC

It is responsible for the switch between media stream

and control flow;

It controls the clock and monitors the insertion box;

GE interface on the panel is suitable for either optical or

power access, and is for Abis transmission. It also

provides GPS antenna interface;

Default setting is 1, and and 1+1 backup is optional.

Fiber switch boardFS

It is used to switch IQ signal;

Each FS board supports 6 fiber interface, used for

connection with RU module;

Default setting is 1, and the maximum configuration is 2,

which depends on the number of optical ports

G/W baseband boardUBPG/BPC

It is used to deal with baseband signal;

GSM and WCDMA use different types of baseband (UBPG

or BPC). One UBPG supports 12 TRX;

Fan module (FA): It is on one side of subrack to dissipate heat;

1 fixed configuration

Power module

Site alarm

Control & clock

& switch board

Fiber switch

board

GSM baseband /

WCDMA baseband

Fan module


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9. What is the radio frequency processing unit forZXSDR equipment?

RU02

RU02A

RSU60

R8860

RU60

RSU40Built-in frequency

module

Remote radio headmodule

G single mode

dual-carrier

U single mode

multi-carrier

GU dual mode

multi-carrierGU dual mode

multi-carrier

GU dual mode

multi-carrier

R8860 GU906/GU186Output power of the set-top unit 60w

R8860 GU908/G188/GU858/G198

Output power of the set-top unit 80w

G/U

G/U can share one RU60/R8860, in a

dual mode form.

For example: If G/U share the 900M

band, a RU60-900 can be collocated.

G/U

G/U cant share the same RFP unit, an

independent collocation is needed.

For example, if GSM is 1800M, and

UMTS is 900M, GSM is configuredwith RU60-1800; UMTS is configured

with RU60-900.


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10. Technical specifications for RFP unit RU/RRU (1)

RU/RRU type Mode Capacity for oneRU/RRU

Applications Independentnetworking?

Built-incombiner?

RU02GSM single mode

dual-carrier2TRX

Suitable for low/medium traffic

areas with no more than 4

carrier for each cell

Yes Yes

RU02AGSM single mode

dual-carrier2TRX

Suitable for low/medium traffic

areas, and expanded to S4 by

integrating with RU02

No Yes

RU60GU dual mode

multi-carrier

GSM 16TRX or

UMTS 14C or

4G+1U which is the

maximum configuration

for the dual mode

S1S12 configurationsuitable for medium/large traffic

areas, compatible with G/U dual

mode networking configuration.

Yes No

RSU60GU dual mode

multi-carrier

GSM 16TRX or

UMTS 14C or

4G+1U which is the


for the dual mode

S1S12 configuration, suitable

for low/large traffic areas or

outdoor coverageYes No

R8860GU906/GU186

/GU908/G188/GU8

58/G198

GU dual mode

multi-carrier

GSM 16TRX or

UMTS 14C or

4G+1U which is the


for the dual mode

S1S12 configuration, in form

of scattered base stations, and

suitable for some special

applications, like railway areas,

indoor coverage, and ultra long

range coverage.

Yes No

1 TDUP unit in RU02,and 2 antenna andfeeder interfaces onthe panel;

No TDUP unit in

RU02A, no antenna

and feeder interface

on the panel;

So independent

RU02A networking is

not expected, and it

can only integrate with

RU02 to form S4.

Stronglyrecommended radiofrequency processingunits!


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11. Technical specifications for RFP unit RU/RRU (2)

RU/RRU type

Set-top unit output power WWork frequency

band

Work

bandwidth

GSM

sensitivity

Support of

frequency

hopping

Coverage

strengthening

technologyGMSK 8-PSK

RU02 40wuponcombination 20W

25 upon combination12.5W

900/1800M 25M/75M -112dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DPCT/DDT/FWDR/IRC

RU02A40wupon

combination 20W

25 upon combination

12.5W900/1800M 25M/75M -112dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DPCT/DDT/FWD

R/IRC

RU60

60Wpower

configuration per

carrier

40Wpower

configuration per

carrier

EGSM/900/180

0M

GU dual

mode 20M;

G single

mode 10M

-113dBm

Baseband

frequency-

hopping/radio

frequency-hopping

DDT/FWDR/IRC

RSU60

80Wpower

configuration per

carrier

50Wpower

configuration per

carrier

EGSM/900/180

0M/850/1900M

GU dual

mode 20M;

G single

mode 15M

-113dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DDT/FWDR/IRC

R8860

GU906/GU186

60Wpower

configuration per

carrier

40Wpower

configuration per

carrier

EGSM/900/180

0M

GU dual

mode 20M;

G single

mode 10M

-113dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DDT/FWDR/IRC

R8860

GU908/G188/

GU858/G198

80Wpower

configuration per

carrier

50Wpower

configuration per

carrier

EGSM/900/180

0M/850/1900M

GU dual

mode 20M;

G single

mode 15M

-113dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DDT/FWDR/IRC

The bandwidth constraintrequires moreconsideration aboutfrequency planning, somore difficulties comealong!

This influences linkbudget, and differs fromthe traditional coverageplanning.


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12. How is the carrier power allocated for the multi-carrier radio unit?

RU/RRU type

The totaloutput power

of the set-top

unit W

The configuration of maximum

output power per carrier for R8.2

W

RU60 60W

GSM7 levels

10W/12W/15W/20W/30W/40W/6

0W

UMTS20W/30W/40W

RSU60 80W

GSM9 levels10W/12W/15W/20W/25W/30W/4

0W/60W/80W

UMTS20W/30W/40W

R8860

GU906/GU18660W

GSM 7 levels

10W/12W/15W/20W/30W/40W/6

0W

UMTS20W/30W/40W

R8860

GU908/G188/GU

858/G198

80W

GSM 9 levels

10W/12W/15W/20W/25W/30W/4

0W/60W/80W

UMTS20W/30W/40W

R8.2 version the existing version

1. The output power of each GSM carrier

frequency in the same radio frequency module

must be the same.

2. The degree of adjustment for each carrier

frequency must be the same when the power

level needs to be adjusted.

3. GSM carrier frequency number power per

carrier frequency + UMTS carrier power


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II. STSR and OTSR networking

1. What isSTSR/OTSRnetworking?

2. What is multi-carrier combining?

3. What are the forms of OTSR networking?

4. What is the influence of OTSR networking over the Internet?


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1. What is STSR/OTSR networking?

Sectorized TX Sectorized RX

sectorized transmitter and

sectorized receiver

1 coverage zone for each cell

not including repeater system

The same as traditional omni site or N

sector site networking

Omni TX Sectorized RX

Omni transmitter and sectorized

receiver

more than 1 coverage zone for each

cell

Logically, this networking allows

several antennas of different

locations and directions to be in

one cell

OTSR can be realized by a

traditional power divider, or SDR

multi-carrier combining.

STSR OTSR


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2. What is Multi Carrier Unite Combine?

MCUM Multi Carrier Unite Combine

M RRU are connected with N antenna (M is a multiple of N, values can be 1

2)

Logically, all the carrier of RRU belongs to one cell the downlink signals

of a number of RRU are the same and the uplink signals are combined

through choices.


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3. What are the forms of OTSR networking?

The form of MCUM

OTSR-2 02 station model realized by MCUM

needs 2 R8860 with 2 carrier for each. The

output power of the set-top unit is 30W.

OTSR realized by MCUM doesnt incorporate

extra loss.

The form of power divider

The form of power divider can be

realized by any base station form. Forexample B8018 OTSR-2 O2 stationmodel with 2TRX and a 20W set-topunit. With the 3dB loss by power dividerthe power is reduced to 10W.

By the use of powder divider 3dB lossis incorporated and the power of the

set-top unit is reduced by half.

R8860

Ant1

0

Ant2

60

R8860

Ant1

0

Ant2

60

Power divider

3dB

Only the

emission path

is drawn here.

Logically, the two directions of

coverage (0/60) belong to the

same cellboth the

configuration and the channel

number are the same

The motion among the cells

covered by the two antennae

doesnt need

reselection/handover among the

cells.


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4. Influence of OTSR networking over the internet

Influence over the performance of the Internet

Reduction of the reselection/handover between cells1

Influence over the frequency and the planning of the nearby cell

One cell may have several coverage directions, possible co& adjacent interference on all directions needs

consideration. Especially, in cities of great intensity, frequency planning is more difficult

High-speed railway coverage should use MCUM OTSR, the distance of frequency reuse is increased, and the

planning is easier.

The increase of coverage directions of a cell means the increase of coverage range. So this is no longer only

limited by the beamwidth and gain of each antenna but more consideration is put into the nearby cell.

2

The influence over the coverage and the planning of capacity

The received signal of the uplink N antenna is combined through choices

so the uplink receive diversity gain is increased, and the quality of uplink

coverage is improved

Since N direction antennae transmit the same signal, so the downlink has the

transmit diversity. That is, by increasing an irrelevant transmit energy, the

link gain is improved so as to confront C/I fluctuation caused by multi-link

and to improve the quality of downlink coverage.

OTSR networking realized by SDR multi carrier unite combine can avoid

3dB loss caused by use of power divider, so the output power of the set-top

unit is guaranteed.

For OTSR networking, in the same logical cell, the same carrier of different

RU/RRU must be configured on the same UBPG.

Limited by the relationship between RU/RRU carrier configuration and

power distribute, more attention is paid to the balance between coverage and

capacity.

3


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III. Influence of ZXSDR equipment over networkplanning and optimization

1. Influence of SDR over network p & o (1)

2. Influence of SDR over network p & o (2)

3. What is the difference between ZXSDR and the link budget of traditional base station?

4. What is the output power of the set-top unit of RU/RRU with different configuration?

5. What should be considered over the calculation of feeder loss made by a distributed base

station?

6. What is the influence of OTSR networking over link budget?

7. What should be considered as to ZXSDR capacity planning?

8. Is the channel planning of ZXSDR is the same as a traditional base station?

9. How does multi-carrier RU/RRU bandwidth constraint influence frequency planning?

10. What is the influence of BBU constraint over MA configuration when baseband frequency-

hopping happens?

11. Examples for the constraint of ZXSDR equipment over frequency planning


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1. What is the influence of SDR over network p & o(1)

It provides the best smoothevolution plan towards TCO radio

network.

It improves the network p & o

technology for the 2/3G convergence

Remote radio head composes a

distributed base station.

It provides better network o & p

solutions for special scenes, e.g., high-

speed railway, indoor coverage and

dense urban spaces with complicated

transmission environment.

ZXSDR equipment supports

baseband frequency-hopping.It enriches frequency planning.


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2. What is the influence of SDR over network p & o(2)

Work bandwidth constraint ofmulti-carrier RU/RRU

makes frequency planning more

difficult.

The close relationship between the

power of set-top unit ofmulti-carrier RU/RRU and its capacity

makes the following planning and

optimization of network capacity

expansion more complicated.

Configuration of 2 set of data for

OMCR and OMCB

makes the implementation and

maintenance of the project more

difficult.


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3. What is the difference between ZXSDR and thelink budget of traditional base station?

Calculation of the

power of set-top unit

Considerations for

feeder loss

OTSR networking brings uplink/downlink gain.

Dual-carrier is the same as a traditional

base station

The power of set-top unit of multi-carrier

RU/RRU is equally shared.

No difference exists between the feed line

connection of SDR macro BTS and that of a

traditional base station.

Calculation of feeder loss for a distributed

base station is different.

When SDR multi-carrier radio frequencyprocessing unit isadopted, it does not

need to configurefeeder arrester!


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4. What is the output power of the set-top unit of RU/RRUwith different configuration?

Now multi-carrier RU/RRU follows the

principle of equipartitionofcarrier powerAt present, for R8.2 version, the

maximum output power of each carriermust be configured at the same level!

Carrier

number

RU02 /RU02A RU60

/R8860(60W)

RSU60/R8860(80

W)

GSM The maximum

power per carrier

GMSK (W)

The maximum

power per carrier

GMSK (W)

The maximum

power per carrier

GMSK (W)

1 40 60 80

2 40 30 40

3 20 20 25

4 20 15 20

5 12 15

6 10 12

GSM

Carrier

number

UMTS

Carrier

number

RU60/R8860(60W) RSU60/R8860(80W)

The

maximum

power per

carrier of

GSM (W)

The

maximum

power per

carrier of

UMTS (W)

The

maximum

power per

carrier of

GSM (W)

The

maximum

power per

carrier of

UMTS (W)

1 1 40 20 60 20

2 1 20 20 30 20

3 1 12 20 20 20

4 1 10 20 15 20

The output power of set-top unit of GSMwith 8PSK modulation is about 2dB lowerthan that of GSM with GMSK modulation.

If dual-carrier RU02/RU02A is S3~S4, theloss for internal combiner is 3dB.

1

2

GSMsinglemode

configuration

G/Udual-mode

configuration

The output power of set-top unit of UMTSper carriershould be 20W at least.It canalso be configured as 30W or 40W. Atpresent, R8.2 version only supports thedual mode XG+1U configuration.


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5. Considerations for the feeder loss made by adistributed base station

Installation near

an antenna

1

RRU and BBU is connected

by fiber

RRU and antenna is

connected by 1/2 jumper.

The installation

position keeps a

distance from

both BBU and

the antenna.

2

RRU is installed on the

platform of a towera

platform under the antenna

or installed at the roof

and it is lower than the

antenna

RRU and BBU is connected

by fiber

RRU and the antenna is

connected in a normal wayby 2 1/2 jumper + main

feed line (7/8 or 5/4 or

13/8 feed line), the length

of main feed line is the

distance between RRU and

the antenna.

1. 2m loss for softer jumper

2. 2 connector loss

Height

of

antenn

a (m)

Height

of

RRU

on

platform(m)

Lengt

h of

7/8

main

feedline

(m)

Lengt

h of

jumpe

r (m)

Conne

ctor

+

light

ningarres

ter

900M(

dB)

1800

M(dB)

50 0 50 4 6+1 2.89 4.04

50 10 40 4 6+1 2.5 3.46

50 20 30 4 6+1 2.11 2.89

50 30 20 4 6+1 1.73 2.31

50 50 0 2 2 0.32 0.43

1. 22m softer jumper loss

2. Main feed line loss between RRU and

the antenna

3. 6 connectors loss

The table here is only for reference, in practice please

calculate according to specific conditions!


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6. What is the influence of OTSR networking overlink budget?

Uplink:

Several antenna diversity receivers in one logical cell is

combined according to MRC, so it is believed that there is

2dB gain of 4 diversity receivers.

Downlink

Several antennae transmit the same signal. So by increasing

some irrelevant transmit energy, the link gain is improved to

confront C/I fluctuation caused by multi-link and to get the

downlink transmit diversity gain, at the value of 2 dB.


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7. What should be considered as to ZXSDRcapacity planning?

Mutual constraintsbetween coverageand capacity

The maximumconstraint of carriersupported by RU/RRUand BBU

OTSR networking

If the number of carrier needed by the cell is more than what a single

RU/RRU supports, the increase of RU/RRU should be considered. But thequantity should not overpass the maximum configuration for a single station.

Dual-carrier module RU02/RU02A is suitable for configuration lower

than S4.Configuration for S34 should be checked by a combiner to see

if the power of set-top unit satisfies coverage requirement.

The power of set-top unit of multi-carrier module RU60/RSU60/R8860 isshared by each carrier. If the carrier frequency for a single RU/RRU is too

much, the power of set-top unit for each carrier frequency will be too

small. In this case, the power of set-top unit should be checked to see if it

satisfies coverage requirement. If notone more RU/RRU should be

added to ensure that the carrier frequency for each RU/RRU is proper. This

is especially important when the network is to be moved

When the logical carrier frequency for each cell is decided, the physical

carrier frequency should be calculated according to the quantity of

RU/RRU and antenna. The quantity of UBPG board should be calculated

according to physical carrier frequency but not logical carrier frequency.


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8. Is the channel planning of ZXSDR is the same asa traditional base station?

For the hardware part, ZXSDR has no limitation for channelplanning and configuration, and the channel planning is the

same as a traditional base station and it supports all types of

channel

SDCCH

TCH

PDCH

HR/FR

Dynamic/ static channel allocation

Dynamic channel translating


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9. How does multi-carrier RU/RRU bandwidth constraintinfluence frequency planning?

There are constraints forthe operation bandwidth of multi-carrier radio frequency processing unit

(RU60/RSU60/R8860). No matter it is baseband frequency-hopping, radio frequency-hopping, or no

frequency-hopping, the multi-carrier radio frequency processing unit must be configured with a

center frequency. All the frequencies of all carrier frequencies in this radio unit must not be larger

than 1/2 operation bandwidth above or below the center frequency. Here are the detailed operation

bandwidth specifications:

1

0~10MHz

2 3 4 5 6 7 8 9 10

10~20MHz

RRU1 RRU2RRU3

UBPG11

Multi-carrier radio frequency processingunit type

GSMsinglemode

GU dualmode

Notes

RU60/

R8860 GU906/GU186

10M 20M 1. For GU dual mode,the total bandwidth of 17M is not achieved byR & D engineers, that is GSM12MUMTS 5M.

2. The single G mode of 60W module is 10M. The

configuration of frequencies must not be larger than 5M

above or below the center frequency.

3. The single G mode of of 80W module is 15M. The

configuration of frequencies must not be larger than 7.5M

above or below the center frequency.

RSU60/

R8860 GU908/GU188/GU858/GU198

15M 20M


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10. What is the influence of BBU constraint over MAconfiguration when baseband frequency-hopping happens?

Constraint of baseband

frequency-hopping

Baseband frequency-hopping is

limited by the processing capacity of

DSP on UBPG, the number of

frequency point for 1 MAList should

be no more than 12See the

example of Cell1 on the right.

Baseband frequency-hopping within

1 cell but more than 1 UBPG, 2

MAList should be configured.

See the example of Cell2 on the

right. Here its frequency points are

configured on both UBPG1 and

UBPG2, so each needs a MAlist

(MA2 andMA3).

UBPG1Cell 1/MA1 Cell2 / MA2

UBPG2Cell 3/MA4Cell2 / MA3

UBPG1Cell 1/MA1

UBPG2Cell1 / MA2

Cell1/Cell2/Cell3, with 8 carrier frequency for each, which usesbaseband frequency-hopping, the MAList confituration is asfollows Cell 1/MA1 = 8 carriers; Cell 2/MA2 = 4 carriers;Cell 2/MA3 = 4 carriers; Cell 3/MA4 = 8 carriers;For Cell2, the configuration of MA=8 carriers is not allowed

For Cell1 with 16TRX, which uses baseband frequency-hopping,the MAList configuration is as follows

Cell 1/MA1 = 12 carriers; Cell 1/MA2 = 4 carriers;MA1=16 carriers is not allowed

It only influences MA configuration

for baseband frequency-hopping,

and doesnt influence radio

frequency-hopping!


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11. Examples for the constraint of ZXSDRequipment over frequency planning

NO.Scenarios

RRU1=0~10MHz RRU2=10~20MHz Yes/No

1Baseband frequency-hopping between RRU1 and

RRU2 of the same cell and the same UBPGYes

2Baseband frequency-hopping between RRU1 and

RRU2 of the same cell, but different UBPGNo

3Radio frequency-hopping between RRU1 and RRU2

of the same cellNo

4Separate radio frequency-hopping on RRU1 and RRU2

of the same cell

Yes

5

Within one cell, some frequency points for baseband

frequency-hopping, and some for radio frequency-

hopping

Yes

6On the same RRU, baseband frequency-hopping and

radio frequency-hopping by the same carrier frequencyNo

E.g., the configuration of frequency point for both RRU1 and

RRU2 is 10MHz.


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IV. Scenarios for the application of ZXSDRequipment

1. What are the scenarios for the application of ZXSDR equipment?

2. What is the application of OTSR for high-speed railway like?

3. What should be considered as to the application for high-speed railway network

planning?

4. What should be considered for handover/reselection parameters planning for high-

speed railway application?

5. What is the solution for OTSR application in cities of great intensity (like Hong Kong)?

6. What is the application for indoor coverage of a distributed base station like?

7. What is the application for ultra long range coverage of a distributed base station like?

O


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1. What are the scenarios for the application ofZXSDR equipment?ZXSDR is a series of base station equipment, and satisfies different

kinds of application scenarios!

The networking for a distributed base

station is more flexible, and is quite

suitable for these scenarios:

High speed motion scenarios e.g., high-

speed railway or highways

Cities of high intensity which need three-

dimensional coverage e.g., Hong Kong

indoor coverage e.g., shopping malls,

hotels, etc.;

outdoor coverage e.g., deserts, sea

coverage.

B8200

R8860 R8860

Macro BTS is suitable for the following scenarios,

e.g., cities of high intensity, urban areas, suburban

areas, rural areas, and roads. This application is

similar with traditional macro BTS.

Suitable for OTSRnetworking to reduce

handover/reselection

between cells

I t l U O l 2 Wh i h li i f OTSR f


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Internal Use Only2. What is the application of OTSR forhigh-speed railway like?

Several RRU are configured in one logical cell,connected through OTSR networking

Synchronized and undistorted remotion realized byBBU and RRU

The deploy is flexible, the construction of network isfast, and equipment rooms and other kinds of relevantresources can be saved;

RRU supports cascade hierarchical remote and issuitable for continuous coverage for belt like areas;

The configuration of several RRU in one cell issupported, longer cell coverage is realized, andhandover between cells is reduced;

Because of the synchronized and undistorted remotionand frequency offset compensation between BBU andRRU, the quality of coverage is guaranteed.

I t l U O l


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3. What should be considered as to the application forhigh-speed railway network planning?

Networkplanning

What should be considered for high-speed railway network planning?

Coverage

planning

Compared to the public network, the design of signal level should pay more attention to the fading margin during the time of

handover;Overlapping areas of neighbor cells should be considered, especially reselection/handover between cells;

The location of RRU should not be too far from the railway , no more than 50m is suitable;

Choice of types of antennaHigh-speed railway special network forms a ribbon coverage, narrow beam lobe, horizontal beamwidth

is about 35 degree, is suitable; the antenna gain should be 1821dBi; the antenna should not be too high, and it should be lower than

that of a public network, and the suggested height is 510m;

4 TRX diversity gain for uplink; transmission diversity gain for downlink

Capacity

planning

The carrier frequency for each cell is calculated according to the number of passengers, and the classic traffic model for high-speed

railway. The configuration of carrier frequency for each RRU is the same in one cell;

If possible, areas along the railway should use the same LAC to avoid frequent location update;

On LAC border, SDCCH should be added properly to reduce signaling jam caused by location update.

Frequency

planning

The special network uses 900M frequency point to reduce the influence of Doppler shift;

It is suggested that some frequency point should be reserved for high-speed railway special network;

If the frequency point is shared by a special network and a public network, it is suggested that the special network BBCH must use

TCH frequency point of the public network for planning,when frequency planning is made for high-speed railway special network. So it

can be avoided that a subscriber is wrongly connected to a special network cell, when he powers on the phone near the special

network cell;

The location of NCC of a special network should also be different from that of a public network so as to guarantee the independenceof the special network when it is planned.

Neighbor

cells

planning

The special network for high-speed railway and the public network are relatively independent. The configuration of neighbor cells are

only for areas between the station and the public network. Here are the specific suggestions:

Cells near the station and the waiting room are configured as neighbor cells to be used as a area for transition and isolation

between the public network and the special network; So it can be guaranteed that the cell phones of passengers can be

connected to the public network when their travel is finished;

When the train is moving, there is no configuration of neighbor cells between the special network and the public network,

and the configuration of neighbor cells is only between special networks; When the train is moving, it should be guaranteed

that the cell phone is within the special network; the cells, which are configured as neighbor cells for a specific cell, are twocells right before and after that specific cell, so the number of neighbor cells can be reduced.

I t l U O l


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4.1 Principles of handover/reselection parametersplanning for high-speed railway station specialnetwork cell

Important parameters Suggestions

RxLevAccessMin A platform cell should be 2dB lower than a public network.

CRO (choosing and reselection offset) A platform cell should be 10 dB higher than a public network.

TO (temporary offset) 0

PT (penalty time) 0

CRH 4

Handover algorithm

Set on uplink/downlink handover based on quality,

uplink/downlink handover based on signal level, PBGT

handover, rapid signal level drop handover (the relevant cells

should be a chain network).

PBGT threshold

It is suggested that PBGT threshold of handover from the

public network to the special network cell should be reduced.

It is suggested that PBGT threshold of handover from the

special network to the public network should be increased.

SDCCH handover Set on (the platform special network cell)

Handover preprocessing 0the platform special network cell

Internal Use Onl 4 2 i i l f h d / l ti t


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Internal Use Only4.2 principles of handover/reselection parametersplanning for high-speed railway chain specialnetwork cell

Important parameters Suggestions

C2 parameter should be set on

or not No

Handover algorithm

Set on uplink/downlink handover based on quality, uplink/downlink

handover based on signal level, PBGT handover, rapid signal level

drop handover (the special network cell should be a chain network)

PBGT threshold

It is suggested that the PBGT threshold of handover between special

network cells should be 27 (3dB)

SDCCH handover Set on

Average window size 2

Level/quality handover N/P 2/1

PBGT handover N/P 2/1

Rapid signal level drophandover N value 2

The shortest handover interval 0

HoFailPenaltyTime between

cells 0

Handover preprocessing 0

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5. BBU+RRU OTSR networking in Hong KongOTSR-3 has 3 antennae for 3 directions, each of which covers different target coverage areas.Usually, on each direction, the target coverage area is limited, but the target is specific, forexample, a street, a building, a shopping center, etc,.

All the RRU on these directions belong to one logical cell, so no handover/reselection isneeded for them;

As to neighbor cell planning, overlapping coverage on all these directions should beconsidered.

This antenna covers the

streets below and the

residents buildings

nearby.

This antenna

covers the

residents building

right in front of it.

This antenna covers

another residents

building.

They belong

to one logical

cell.

Internal Use Only


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6. BBU+RRU indoor coverage application

Feeder Fiber

Indoor three-dimensional

coverage covers all floors

and basements;

The structure of BBU+RRU

is easy to install, and its

networking is flexible. Also,it saves feeder loss.

Internal Use Only


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7. BBU+RRU outdoor coverage application

R8860

1. High gain antenna 18 22dBi is used

2. R8860 is installed near the antenna on the tower so as to save

feeder loss, and to increase the effective radiated power (EiRP) of

an antenna;

3. One carrier for a single RRU with 60W output power of a set-top

unit

4. If the maximum coverage is over 35km,dual timeslot should be

set on. Then, the capacity of each carrier is half reduced. If

remote coverage of 8 timeslot is required, 2 RRU will be needed.

The configuration is 1 carrier for 1 RRU, and 1 antenna for one

cell;

5. If the number of RRU for a cell is more than 2, it is suggestedthat an extra antenna should be configured without change of the

output power of the set-top unit;

6. For installation, the weight capacity of the tower and the

installation space for RRU should be considered.

High gain

antenna

Installation of RRU near

the antenna on a tower

BBU can be installed

independently, or in a

macro station prepared.


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sdr basics and network planning v1.1_091207

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