go_np10_e1_1 sdr basics and network planning

7/28/2019 GO_NP10_E1_1 SDR Basics and Network Planning

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SDR Basics and Network

Planning

Zte university



Outline:

•ZXSDR equipment family

•ZXSDR networking and cascade objective

•ZXSDR maximum configuration•ZXSDR’s RU/RRU technical criterion

•Differences between STSR and OTSR

•OTSR networking in two ways

ZXSDR

I. ZXSDR series

equipment introduction

II. STSR andOTSR networking

III. ZXSDR equipmentp & o

•Influences over o & p

IV. ZXSDR equipment

applications

• High speed railway

areas

•OTSR networking

Link budget

Capacity planning

Channel planning

Frequency planning

•Indoor coverage

•Outdoor coverage



I. ZXSDR series equipment introduction

1. What is SDR?

2. What are the technological qualities of SDR?

3. What are ZXSDR series equipment? How about the maximum

configuration?

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

5. What is the maximum distance for RRU cascade? What is the maximum

number of cascade tiles?6. How to realize RRU cascade synchronization?

7. What is the maximum configuration for ZXSDR series equipment?

8. What is the baseband unit for ZXSDR equipment?

9. What is the radio frequency processing unit for ZXSDR equipment?

10. First technical specifications of RU/RRU: Work pattern? Capacity?

Applications? Independent networking? With built-in combiner or not?11. Second technical specifications of RU/RRU: Power of set top unit?

Working frequency bands? Bandwidth constraint? Sensitivity?

Compatible with what kind of coverage strengthening technologies?

Baseband frequency-hopping supported or not?

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



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.



RU02

B8200

RU02A

RSU60

Outdoor macro BTS

BS8900

R8860

R8860

RU60

B8200+R8860 to

form a scattered

base station

μTCA structure, 2U high.

Processing capacity of eachUBPG (12 TRX carrier frequency)

No more than 5 basebandprocessing boards for each1B8200

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 beexpanded 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 themaximum configuration for a single station withan additional piece of equipment. (At present,the additional piece of equipment is notavailable, the period of validity of the apertureexpires on 31st, Dec, 2009.)

Compatible with G/U dual mode

Indoor macro BTS BS8800

3. What are ZXSDR series equipment? How about

the maximum configuration?GU dual mode multi-carrier

A single R8860 configuration is

1-6 GSM carrier frequency or 1-4UMTS carrier frequency. Themaximum configuration is4G+1U. ( At present, 2Uconfiguration is not supported byR8.2)

Outdoor micro BTS BS8906 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.



4. What are the ways of networking between BBU

and 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



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



6.How to realize RRU cascade synchronization?

The system can automatically calculate the delay between BBUand 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.



7. What is the maximum configuration for ZXSDR

series 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 S10/10/10/10/10/10It is suggested that S12/12/12 or S6/6/6/6/6/6 should be the maximumfor a single station.

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

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!)



8. What is the baseband unit for ZXSDR

equipment?

Power module（PM）：

Provide power for each board;

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

Site alarm（SA）：

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 board（CC）： 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 board（FS）：

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 board（UBPG/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



9. What is the radio frequency processing unit for

ZXSDR equipment?

RU02

RU02A

RSU60

R8860

RU60

RSU40Built-in frequency

module

Remote radio head

module

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/GU186 —— Output power of the set-top unit 60w

R8860 GU908/G188/GU858/G198

—— Output power of the set-top unit 80w

G/U of the same band

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 of different band

G/U can’t 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.



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

RU/RRU type Mode Capacity for oneRU/RRU

Applications

Independen

t

networking?

Built-incombiner?

RU02

GSM single

mode dual-

carrier

2TRX

Suitable for low/medium

traffic areas with no more

than 4 carrier for each cell

Yes Yes

RU02A

GSM single

mode dual-

carrier

2TRX

Suitable for low/medium

traffic areas, and expanded

to S4 by integrating with

RU02

No Yes

RU60GU dual mode

multi-carrier

GSM 1～6TRX or UMTS 1～4C or

4G+1U which is the

maximum

configuration for the

dual mode

S1～S12 configuration，

suitable for medium/large

traffic areas, compatible

with G/U dual mode

networking configuration.

Yes No

RSU60GU dual mode

multi-carrier

GSM 1～6TRX or

UMTS 1～4C or

4G+1U which is the

maximum


dual mode

S1～S12 configuration,

suitable for low/large traffic

areas or outdoor coverageYes No

R8860

GU906/GU186

/GU908/G188/G

U858/G198

GU dual mode

multi-carrier

GSM 1～6TRX or

UMTS 1～4C or

4G+1U which is the

maximum


dual mode

S1～S12 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 and

feeder interfaces on

the 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.

Strongly

recommended radio

frequency processing

units!



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

type

Set-top unit output power W Work

frequency

band

Work

bandwidth

GSM

sensitivity

Support of

frequency

hopping

Coverage

strengthening

technologyGMSK 8-PSK

RU02 40w，uponcombination 20W

25， uponcombination 12.5W

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

Baseband

frequency-hopping/radio

frequency-

hopping

DPCT/DDT/FWDR/IRC

RU02A40w，upon

combination 20W

25， upon

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

Baseband

frequency-

hopping/radio

frequency-

hopping

DPCT/DDT/FWD

R/IRC

RU60

60W， power

configuration per

carrier

40W， power

configuration per

carrier

EGSM/900/1800M

GU dual

mode 20M;G single

mode 10M

-113dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DDT/FWDR/IRC

RSU60

80W， power

configuration per

carrier

50W， power

configuration per

carrier

EGSM/900/18

00M/850/1900

M

GU dual

mode 20M;

G single

mode 15M

-113dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DDT/FWDR/IRC

R8860

GU906/GU186

60W， power

configuration per carrier

40W， power

configuration per carrier

EGSM/900/18

00M

GU dual

mode 20M;

G single

mode 10M

-113dBm

Baseband

frequency-

hopping/radiofrequency-

hopping

DDT/FWDR/IRC

R8860

GU908/G188

/GU858/G19

8

80W， power

configuration per

carrier

50W， power

configuration per

carrier

EGSM/900/18

00M/850/1900

M

GU dual

mode 20M;

G single

mode 15M

-113dBm

Baseband

frequency-

hopping/radio

frequency-

hopping

DDT/FWDR/IRC

The bandwidth constraint

requires moreconsideration about

frequency planning, so

more difficulties comealong!

This influences link

budget, and differs from

the traditional coverage

planning.



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

GSM：7 levels10W/12W/15W/20W/30W/40W

/60WUMTS：20W/30W/40W

RSU60 80W

GSM：9 levels10W/12W/15W/20W/25W/30W

/40W/60W/80W

UMTS：20W/30W/40W

R8860GU906/GU186

60W

GSM： 7 levels

10W/12W/15W/20W/30W/40W/60W

UMTS：20W/30W/40W

R8860

GU908/G188/G

U858/G198

80W

GSM： 9 levels

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

/40W/60W/80W

UMTS：20W/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

<= the total output power of the set-top unit

R9 version：

1. The output power of each GSM carrier

frequency in the same radio frequency

module can be configured respectively.

2. The degree of adjustment for each

carrier frequency can be different when the

power level needs to be adjusted.

3. GSM carrier frequency number ×power per carrier frequency + UMTS carrier power

<= the total output power of the set-top unit

Under this premise, the output power of

each carrier frequency can be customized

in the range of 0～the maximum value.



II. STSR and OTSR networking

1. What is STSR/OTSR networking?

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?



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



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 signalsare combined through choices.



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 doesn’t incorporate

extra loss.

The form of power divider

The form of power divider can be

realized by any base station form. For example：B8018，OTSR-2 O2 station

model with 2TRX， and a 20W set-top

unit. With the 3dB loss by power divider ，the power is reduced to 10W.

By the use of powder divider ，3dB loss

is 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 cell（ both the

configuration and the channel

number are the same）；

The motion among the cells

covered by the two antennae

doesn’t need

reselection/handover among the

cells.



4. Influence of OTSR networking over the internet

Influence over the performance of the Internet

•Reduction of the reselection/handover between cells 1

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



III. Influence of ZXSDR equipment over network

planning 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



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.



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

(2)

Work bandwidth constraint of multi-carrier RU/RRU

makes frequency planning more

difficult.

The close relationship between the

power of set-top unit of multi-

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.



3. What is the difference between ZXSDR and the

link 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 frequency

processing unit is

adopted, it does not

need to configurefeeder arrester!



4. What is the output power of the set-top unit of RU/RRU

with different configuration?

•Now multi-carrier RU/RRU follows the

principle of equipartition of carrier power ！ At present, for R8.2 version, the

maximum output power of each carrier

must be configured at the same level!

Carrier

number

RU02 /RU02A RU60

/R8860(60W)

RSU60/R8860

(80W)

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 12GSM

Carrie

r

numb

er

UMTS

Carrie

r

numb

er

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

The

maximum

power per

carrier of GSM (W)

The

maximu

m power

per carrier of

UMTS

(W)

The

maximum

power per

carrier of GSM (W)

The

maximu

m 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 GSM

with 8PSK modulation is about 2dB lower

than that of GSM with GMSK modulation.

•If dual-carrier RU02/RU02A is S3~S4, the

loss for internal combiner is 3dB.

1

2

GSM

single

mode

configur

ation

G/Udual-

mode

configur

ation

The output power of set-top unit of UMTSper carrier should be 20W at least. It can

also be configured as 30W or 40W. At

present, R8.2 version only supports the

dual mode XG+1U configuration.



5. Considerations for the feeder loss made by a

distributed 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 tower （a

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 normalway by 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 ½” loss for softer jumper

2. 2 connector loss

Height

of

anten

na (m)

Height

of

RRU

on

platfor m (m)

Lengt

h of

7/8

main

feedline

(m)

Lengt

h of ½

jumpe

r (m)

Conne

ctor +

lightni

ng

arrester

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. 2×2m ½” 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!



6. What is the influence of OTSR networking over

link 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.



7. What should be considered as to ZXSDR

capacity planning?

Mutual constraints

between coverage

and capacity

The maximumconstraint of carrier

supported by RU/RRU

and 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 S3～4 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 not，one 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.



8. Is the channel planning of ZXSDR is the same

as a traditional base station?

For the hardware part, ZXSDR has no limitation for channel planning 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



9. How does multi-carrier RU/RRU bandwidth

constraint influence frequency planning?There are constraints for the 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

processing unit type

GSM

single

mode

GU dual

mode

Notes

RU60/

R8860 GU906/GU186

10M 20M 1. For GU dual mode, the total bandwidth of 17M is not

achieved by R & D engineers, that is GSM12M，UMTS 5M.

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

configuration of frequencies must not be larger than 5Mabove 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



What is the influence of BBU constraint over MA

configuration 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 12。See 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 and MA3).

UBPG1Cell 1/MA1 Cell2 / MA2

UBPG2Cell 3/MA4Cell2 / MA3

UBPG1Cell 1/MA1

UBPG2Cell1 / MA2

Cell1/Cell2/Cell3, with 8 carrier frequency for each, which uses

baseband frequency-hopping, the MAList confituration is as

follows：

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 doesn’t influence radio

frequency-hopping!



IV. Scenarios for the application of ZXSDR

equipment

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?



1. What are the scenarios for the application of

ZXSDR 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 OTSR networking to reduce

handover/reselection

between cells



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

railway like?

Several RRU are configured in one logical cell,

connected through OTSR networking

Synchronized and undistorted remotion realized by

BBU and RRU

The deploy is flexible, the construction of network is

fast, and equipment rooms and other kinds of relevant

resources can be saved;

RRU supports cascade hierarchical remote，and is

suitable for continuous coverage for belt like areas;

The configuration of several RRU in one cell is

supported, longer cell coverage is realized, and

handover between cells is reduced;

Because of the synchronized and undistorted remotion

and frequency offset compensation between BBU and

RRU, the quality of coverage is guaranteed.



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

speed railway network planning?Network

planningWhat 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 antenna：High-speed railway special network forms a ribbon coverage, narrow beam lobe, horizontal

beamwidth is about 35 degree, is suitable; the antenna gain should be 18～21dBi; the antenna should not be too high,

and it should be lower than that of a public network, and the suggested height is 5～10m;

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

Capacityplanning

The carrier frequency for each cell is calculated according to the number of passengers, and the classic traff ic 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

independence of 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 two

cells right before and after that specific cell, so the number of neighbor cells can be reduced.



4.1 Principles of handover/reselection parameters planning

for high-speed railway station special network 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 0（the platform special network cell）



4.2 principles of handover/reselection parameters planning

for high-speed railway chain special network 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 drop handover N value 2

The shortest handover interval 0

HoFailPenaltyTime between cells 0

Handover preprocessing 0



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 networkingis flexible. Also, it saves

feeder loss.



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 issuggested that 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.

go_np10_e1_1 sdr basics and network planning

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