GSM P&O Special Subject Manual-SDR Frequency Planning V1.1

7/25/2019 GSM P&O Special Subject Manual-SDR Frequency Planning V1.1

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SDR Frequency Planning

Special Subject Manual

Version: V1.1

Released by:

GSM Network Planning & Optimization Dept.

Engineering Seri!e Diision

"#E $orporation

This document contains proprietary information of ZTE Corporation and is not to be disclosed or used

except in accordance with applicable agreements.


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GSM Network Planning & Optimization Dept

Special Subject Manual

!er"ion intro#uction$

Version Date Writer Assessor Translator Amendment records

V.! "!!#$!%$

!%

Chen Chun Chen &i' Tang

(a)ing

*eng +iao(ing &one

V. "!!#$"$ Cao (e Chen &i *eng +iao(ing ,-! is changed to ,/-%!.




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%ey wor#"$

Dual$mode ,,-' !012 fre3uency band limit' 4T/,' 0C-0

b"tract$

This manual mainly introduces the effects that /D, e3uipment features ha5e on

fre3uency planning' including the following aspects6

!012 fre3uency band limit of dual$mode ,,-7

8aseband hopping 0Alist should not cross -89:7

Application of 0C-0.

bbr$

0C-06 0ulti$Carrier -nite 0ode

,,-6 ,emote ,adio -nit

4T/,6 4mni$Transmission /ectori2ed ,ecei5ing

-89:6 -ni5ersal 8aseband 9rocessing board for :/0

Re'erence"$




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Contents1 Overview 1

2 10MHz Frequency Band Limit o !ual"Mode ##U 2

$ UB%& Base'and Ho((in) M*List +ot *llowed to Cross UB%& ,

- *((lication o Multi".#/ Com'ination

, 00Hz Frequency 3(ace 4

*((endi5 * Frequency %lannin) or % %ro6ect 10

This document contains proprietary information of ZTE Corporation and is not to be disclosed or usedexcept in accordance with applicable agreements.


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.a'le contents#able %' (orking bandwidt) *or di**erent no. o* #R+s in d,almode RR-................................."

#able %% working bandwidt) o* d,almode RR-..............................................................................;

#able ' S,mmary o* s!enarios *or *re/,en!y )opping.................................................................. bandwidth is re3uired to be # times of signal bandwidth to reach

good inter$modulation distortion@0D= performance. f the downlin> wor>ing

bandwidth of ,,-B,- is "!012' then the feedbac> ADC bandwidth is re3uired to be

!012. 1owe5er' the feedbac> bandwidth of current feedbac> signal ADC is only

#!0. Therefore' under :/0 mode' downlin> wor>ing bandwidth is !012' that is the

:/0 T,+s of the same ,,-B,- are distributed within the bandwidth of !012. The

actual wor>ing bandwidth is closely related to the 9A, of multi$carrier signals' for themulti$carrier signal that different 9A, represents ma>es 9A operate in different linear

2one. 8ecause the 9A, of T,+s of different numbers is different' the actual operating

bandwidth is different. /ee Table " $6

#able %' (orking bandwidt) *or di**erent no. o* #R+s in d,almode RR-

No. o* #R+s *or RR-0R- operation (orking bandwidt)M1z

%2G %3

42G '5

62G '3

'2(7%2G %3

'2(742G %3

%2(7%2G %3

1owe5er' in actual planning the operating bandwidth is not di5ided according to the

number of T,+s configured. *or :/0 system' the unanimous bandwidth limits are

shown in the following table6

#able %% working bandwidt) o* d,almode RR-

.y(es o multi".#/ #U &3M sin)le" &U dual" #emar7sThis document contains proprietary information of ZTE Corporation and is not to be disclosed or usedexcept in accordance with applicable agreements. 2


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mode mode

R-630R8863 G-9360G-'86

'3M %3M ' G-d,almode !,rrently t)e totalbandwidt) !an rea!) ';M ie.

GSM'%M-M#S 5M.

% 63( mode: GSM singlemode is '3M

and the fre3uency points used must be within

ing !0 bandwidth as an example7 pro5ided the fre3uency resource is

rich' which exceeds !0=6

= 9ac>et multiplexing of fre3uency resource' especially the segmentation of 8CC1

and TC1 fre3uency7 should not follow the past ideas.

"= f mode G or G; is used in ,* hopping' the 8CC1 fre3uency point of each cell

plus hopping se3uence should not exceed !0. f the fre3uency range of single

cell has to exceed !0' long hopping se3uence should be segmented into shorthopping se3uences7 in the mean time' T,+s should be configured to different

,,-7 if the cell is configured with only one ,,-' it will lead to waste of ,,-.

Therefore' itHs suggested that mode G; or &G @&G;= be adopted for large site

I&G @&G;= is the 5ariant of G or G;J7 di5ide TC1 fre3uency band into &

segments according to site configuration' and ma>e multiplexing based on the site

groups.

9lease refer to appendix A for details.

;= *or common fre3uency multiplexing and baseband hopping' the fre3uency band

of single site is allowed to exceed !0. f the number of T,+s in the cell is under

%' the number of ,,- needs to be increased' which could be a waste of ,,-.

There is a concept of central fre3uency point relating to the limit of !0 bandwidth.

*or cells with /D, e3uipment of the current 5ersions' a central fre3uency point must

be configured' and the fre3uency points used by the cell must be within


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This document contains proprietary information of ZTE Corporation and is not to be disclosed or usedexcept in accordance with applicable agreements. 4


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1 0-PG -a"eban# ,opping M.i"t Notllowe# to 2ro"" 0-PG

n baseband fre3uency hopping system' each T,+ is configured with a fixed

fre3uency7 after coding and interlea5ing' each 8urst on different frames is scheduled to

different T,+ and transmitted' so as to achie5e fre3uency hopping. /D, e3uipment

supports baseband fre3uency hopping as well as containing 8CC1 in the hopping

se3uence @except T/!=' but the fre3uencies in the 0Alist of a cell is not allowed to

cross the baseband processing board @-89:=.

As shown in the following figure' a siteHs configuration is /BB with "K T,+s in total

on two -89: boards7 the T,+s of Cell" are distributed on two -89: boards. n this

case' if baseband fre3uency hopping is adopted' we ha5e to ma>e two 0Alists for

Cell"' or we can a5oid the problem by adopting imitated baseband fre3uency hopping.

The following table gi5es a summary of combination scenarios of -89: and ,,-'

when /D, e3uipment adopts fre3uency hopping.

#able S,mmary o* s!enarios *or *re/,en!y )opping

Scenari

o

Supposed distribution of

frequency bands

RR0(3+4(+M,z5RR0*3(+4*+M,z

Feasibility

67e"8No9

'


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4 Part o* #R+s ,se


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: pplication o' Multi/;R< 2ombination0C-0 is the product of introducing ;:4T/, to :/0 system. Configure a cell with

se5eral sets of ,,- which transmit exactly the same downlin> signals and ma>e

selecti5ity combination of uplin> signals. n this way' single cell can use multi$

positioned and multi$directioned antennas to co5er areas' which is applicable in special

areas @highways' railways= with the complicated co5erage re3uirements.

*or multi$T,+ combination' the re3uirement for hardware configuration is6 one T,+

must be configured on one -89:' therefore the number of -89: will necessarily

increase' so will the number of ,,-.

As shown in the following figure' for a cell with T,+s' usually -89: is enough7 if

the configuration is 4T/,;' " -89: will be needed' each of which will carry K ,,+s

and their clones.

The influence of 0C-0 on fre3uency planning is6

when baseband hopping is adopted' long hopping se3uence must be segmented into

se5eral short hopping se3uences because 0Alist is not allowed to cross -89:. )ong

hopping se3uence and short hopping se3uence may ha5e different impact on the radio

performance of system' which is also related to channel allocation strategy' but

currently there is no simulation result to be referred to.

This document contains proprietary information of ZTE Corporation and is not to be disclosed or usedexcept in accordance with applicable agreements. 7


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= >++%,z Frequency SpaceThe energy lea>age at K!!>12 and %!!>12 fre3uency offset is $%!d8c and $F!d8c

respecti5ely. K!!>12 fre3uency space is the lowest threshold. ;:99 standards stipulate

that fre3uency space for multi$T,+ test is %!!>12. 8esides' in 5iew of the dynamic

power control of ;!d8' currently configuration of %!!>12 fre3uency space for :/0

multi$T,+ in /D, is recommended.

%!!>12 is recommended by ,D experts' but currently there isnHt any final

conclusion. n case of rich fre3uency resource' we may as well adopt %!!>12 in

planning of fre3uency space' but we must ta>e into consideration the future expansionin the planning process.

This document contains proprietary information of ZTE Corporation and is not to be disclosed or usedexcept in accordance with applicable agreements.


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ppen#i? Frequency Planning 'or PProject

Frequency

resource of ! pro

This document contains proprietary information of ZTE Corporation and is not to be disclosed or usedexcept in accordance with applicable agreements. $

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GSM P&O Special Subject Manual-SDR Frequency Planning V1.1