chapter 10 huawei wcdma network solution

8/12/2019 Chapter 10 Huawei WCDMA Network Solution

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Basic Principles of WCDMA System Huawei WCDMA Network Solution

Chapter 10 Huawei WCDMA Network Solution

This chapter beins with the e!olution of "ifferent !ersions of the WCDMA system to

enable rea"ers to ha!e an o!erall un"erstan"in of the WCDMA system# followe" by

an intro"uction to Huawei$s WCDMA total network solution from the perspecti!e of

specific network construction%

10.1 Overview of WCDMA Evolution

10.1.1 Overview of Standard Evolution

The WCDMA technoloy has one throuh &''(&)(&*(&+ staes since it comes into

bein% The &'' protocol was functionally fro,en in March -.../December 0''' in

12PP official "ocument3 an" almost became mature after two years of impro!ement%

The &) protocol was functionally fro,en in March -..0% The &* protocol was

functionally fro,en in March -..- /with some functions fro,en in 4une3# an" the &+

protocol is estimate" to finali,e its functions in December -..)%

3 GPP R99

3 GPP R4

3 GPP R5

3 GPP R6

Function-finalizedtime point

2000/03 2001/03 2002/03 Under plannin

The bearer and control of theCS domain are separated;

support TDM/ATM/IPnetworking

IMS domain is added tosupport the endtoend !oIP"

The protocol is furtherimpro#ed with $%A& in it"

The core network inherits thenetwork s'stem of

(SM/(P)S and uses theTDM networking mode"

Fiure 1!1 De#elopment trend of *( protocols

Compare" with 2SM an" 2P&S networks# the most sinificant chane of the

WCDMA system is the chane of the ra"io network% 5n the WCDMA network# the

&a"io Access Network /&AN3 is use" to replace the Base Station Subsystem /BSS3%

-..)6.76-+ Confi"ential 5nformation of Huawei% NoSprea"in without Permission

Pae0# Total-+


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The WCDMA core network in the &'' !ersion can be rear"e" as a combination of

2SM an" 2P&S core networks in terms of networkin# namely# the &'' core network

is classifie" into the Circuit Switche" /CS3 "omain an" the Packet Switche" /PS3

"omain% The architectures of the CS "omain an" the 2SM core network are basically

the same# so are the architectures of the PS "omain an" the 2P&S core network%

5n contrast to the &'' !ersion# the biest chane of the &) core network is that the

network element function of MSC in the CS "omain of the &'' core network is fulfille"

by the MSC Ser!er an" M2W in the &) !ersion# where the MSC Ser!er processes

the sinalin while the M2W processes the !oice% There is no chane in PS "omain%

8or "etails# refer to the architecture "escription in Chapter 1%

The core network usin the &) protocol has two networkin mo"es9 TDM an" 5P%

When the TDM mo"e is a"opte"# the &) network plannin an" construction arei"entical with that of &'' to a lare "eree% 8or e:ample# in constructin tan"em an"

sinalin networks# many consi"erations are ;ust the same% When the 5P mo"e is

a"opte"# the &) network plannin an" construction are larely "ifferent from that of

&''%

5n contrast to the &) !ersion# an 5MS /5P Multime"ia Subsystem3 "omain is a""e" in

the &* core network# toether with the correspon"in e


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Fiure 1!2 &etworking of the )+ network

The 5MS "omain is o!erlai" with the oriinal PS(CS "omain% 5t is use" to control the

subscribers$ ser!ices% Subscribers can use all kin"s of access techni


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0% WCDMA network construction

8or operators# there are two solutions to buil"in a WCSDMA network9 >pra"in the

ol" one an" establishin a new one%

As to new mobile operators# they will usually choose to establish a new WCDMA

network% 8or 2SM an" 2P&S operators# they nee" to consi"er issues such as the

network compatibility an" roamin% Howe!er# ra"ually they will also choose to

establish a new one% The followin is a comparison between these two solutions%

Solution 09 >pra"in from 2SM to the WCDMA &'' network9

This solution will turn the -2 2SM network into a network with -2(12 coe:istence by

upra"in MSC# H?& an" 2MSC of the 2SM network into 12 MSC# 12 H? 12

2MSC%

&e


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The upra"in of the oriinal charin system will ha!e a bi impact on the

network operation% The interworkin an" compatibility of multiple manufacturers

an" nationwi"e roamin nee" to be !erifie"%

This solution will i!e a full6scale e!aluation to the problems such as the impact on

the stability of the e:istin network# the continuity of ser!ice capabilities# ser!ice

processin capacity# capacity# le!el of interation an" whether the seamless transition

of 2SM6&''6&)6&*6&+ is a!ailable after the upra"in% 5t is har" to know whether the

tra"itional architecture of -2 switches meets the abo!e re


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There may be coor"ination problems with the han"o!er between -2 an" 12

systems% 5f the manufacturers of the e:istin network "o not set obstacles

"eliberately# it is easy to sol!e this problem%

-% @!olution from &'' to &)

@!ol!in from the &'' network to the &) network# you nee" replace the MSC N@ of

&'' with the MSC Ser!er an" M2W of &) from the perspecti!e of the protocol layer%

Howe!er# in terms of the specific implementation# the construction solution of the &''

network at the initial stae is closely relate" with the amount of in!estment nee"e" for

e!olution an" the "ifficulty of upra"in%

03 Solution 09 >pra"in the &'' network to the &) network

5f the MSC N@ of the &'' network has alrea"y taken into account the i"ea of

processin the sinalin an" !oice separately /that is# the MSC base" on the "esin

philosophy of separatin bearer from control is a"opte" to buil" the &'' network3# the

e!olution will be !ery easy no matter upra"in from &'' to the &) of TDM

networkin# or e!en to the &) of 5P networkin an" only the e


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8ollowin is a comparison between the a"!antaes an" "isa"!antaes of this

solution9

A"!antaes9 The new network has powerful functions an" is capable of smooth

transition to the later all65P networkin as well as &*%

Disa"!antaes9 5t is re


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The functional an" loic entities of the 5MS inclu"e B2C8# CSC8# M2C8# 5M6M2W#

M&8C# M&8P# HSS an" S?8% Some loic entities can be e!ol!e" from the &) function

entities while others must be a""e"%

Therefore# it is better to establish new e


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-% Solution -9 Buil"in the CS network in the &) protocol mo"e

5n buil"in the CS "omain throuh the &) network which separates M2W from the

MSC Ser!er# you can use ATM(5P in the internal core network for transmission an"use the 2MSC for the con!ersion of !oice co"ec as well as the con!ersion of ATM(5P

to TDM%

The a"!antaes of buil"in the network throuh &) are i!en as follows9

5t makes networkin !ery fle:ible% ou can confiure the network capacity fle:ibly

throuh M2W accor"in to the local traffic an" con"uct centrali,e" manaement

an" confiuration throuh the MSC Ser!er%

5t helps e!ol!e to the future packet6base" network% 5t is also helpful to sa!e the

ban"wi"th for transmission%

With Trfo technoloy# the !oice


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an" M2W pro"ucts of &)% The !ersions use" to buil" WCDMA networks !ary with the

construction solution of the operators%

10.2.2 $S Do#ain Contru!tion Solution

The construction of the PS "omain comprises two aspects9 03 the construction of N@s

such as S2SN# 22SN# C2# an" DNS -3 the construction of the 2P&S backbone

network# namely the construction of the WCDMA PS "omain backbone network%

0% Construction of the WCDMA backbone network

There are se!eral construction metho"s for the WCDMA backbone network9

By usin the e:istin 5P network%

By usin the e:istin ATM network%

By usin the pri!ate line network%

By usin the abo!e metho"s for hybri" networkin accor"in to the local

con"itions%

Please note that if we use the e:istin 5P network to buil" the backbone network# we

nee" PN an" firewall for security# while if we use ATM# the firewall is unnecessary%

Normally in the PS "omain of the WCDMA system# we can use the PC of ATM or 5P

for bearin on the 2n interface%

As for the pro!incial 2n interface# if we use the ATM network# it is enouh toachie!e hih security without a""in a firewall at the 2n interface# while if we use

the 5P network# the cost is relati!ely low but e:tra metho"s are nee"e" to ensure

the security# such as a firewall an" 5PSec encryption%

As for the interconnection with e:ternal networks# the 5P mo"e is always nee"e"%

Howe!er# for the interconnection with the 2P&S backbone network# a firewall

must be set%

-% Construction of N@s in the PS "omain

The N@ form of the PS "omain an" the basic functions are ;ust the same no matter itis the 2P&S network# or the &''(&)(&* network of WCDMA%

As to new operators of WCDMA# they shoul" establish a new WCDMA PS "omain

network%

As to the operators of the e:istin 2P&S network# there are two solutions for buil"in

the PS "omain N@s%

Solution 09 >pra"in the e:istin 2P&S network to the WCDMA network9

-..)6.76-+ Confi"ential 5nformation of Huawei% NoSprea"in without Permission

Pae0.# Total-+


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As the "ifference between the 2P&S network an" the WCDMA PS "omain network

lies in their access networks# the S2SN6relate" interface mo"ules nee" to chane

their 2b interface into the lu6PS interface%

&epra"in the ol" one may impact the e:istin network%

Ser!ice a!ailability after the upra"in !aries with the oriinal 2P&S platform%

5n fact# the "ifficulty of implementin this solution an" the upra"in smoothness

"epen" on the buil"in ability of the 2P&S network e


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10.2.% NMS Solution

0% Huawei WCDMA NMS solution

Huawei WCDMA NMS is able to operate# maintain an" manae e


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-% Characteristics of Huawei WCDMA NMS

With iManaer M-... as the core# Huawei can pro!i"e a whole suite of solutions

base" on the =FM network hierarchy to the applications% 5ts characteristics areshown in the followin fiure%

Fiure 1!1 .uawei 0M network construction

03 Dimensional an" layere" =FM network architecture

M-... is capable of centrali,e" manaement an" maintenance of WCDMA N@s#

inclu"in MSC# &NC# S2SN# 22SN# C2# H?& an" No"e B# so as to manae them at

a sinle terminal% >sers can "efine the subnets accor"in to their own nee"s an"

classify the N@s base" on the "ifferent subnets% 8or e:ample# they can classify the

&AN si"e an" CN to con"uct layere" manaement in the same NMS%

M-... also pro!i"es northboun" C=&BA interfaces to the upper NMS in or"er to

communicate with them an" carry out layere" manaement of the network# so that

"ifferent layers of the NMS meet "ifferent "eman"s%

All WCDMA N@s also pro!i"e ?MT software for themsel!es% When W-... is not

a!ailable# the software can still operate an" maintain these N@s%

-3 Comprehensi!e maintenance an" manaement functions to meet "ifferent =FM

re


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The abo!e fiure shows the construction of the =FM system in the WCDMA system

networks# inclu"in the access an" manaement of the CS "omain an" PS "omain

e


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for intra6pro!ince networks% 5n this way# the work amount of 2T translation of the STP

e


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Solution -9 The mobile e


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layer sinalin transfer capability# that is# the STP network as shown in the followin

fiure9

"t#er P$%& ''(

)inalin net*or+ or

toll )inalin net*or+

,P-a)ed '.P )inalin

net*or+! /ll piece) of '.Pe0uipment #ae 'P and

%3U/ tran)fer capailit4 '.P

ma e )ered a) 'G"t#er P$%&

,P earer net*or+

Fiure 1!1 )1 signaling network construction

5f the hierarchical structure matches an" the TMSC ser!er processin "elay is

enouh# the 5P STP e


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8or the interworkin with other networks# it is better to access the nearby network to

affecti!ely a!oi" the alternati!e routes of the mobile subscribers% The remote network

may also be accesse" for this purpose# which is useful for the charin settlement

an" the full utili,ation of @C functions%

10.%.1 Nu#)erin' $lan

Now# the numberin plans a"opte" by the mobile communication inclu"e the network

numberin plan an" the PSTN numberin plan%

The net numberin plan is the numberin plan a"opte" in current China mobile

communication system% Both China Mobile an" China >nicom a"opt this kin" of

numberin plan% No further "escription is i!en for the network numberin plan in this

"ocument%

The PSTN numberin plan is to number the mobile subscribers an" e


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10.%.1 *atewa+ E,!han'e Solution

0% &e


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8or the operators that own fi:e" networks# the followin solutions are a!ailable for the

construction of their mobile ateway e:chane9

03 Solution 09 The fi:e" ateway e:chane is interate" with the mobile 2MSC by

upra"in the fi:e" network ateway e:chane

"perator 23G net*or+

"perator 2

P'.&

"perator / "perator 5 Gate*a

ec#ane

Gate*aec#ane

Gate*a

ec#ane

Fiure 1!1 Position of the upgraded fi2ed network gatewa' e2change 3fi2ed/*( integrated gatewa'

e2change4

The followin functional upra"in shoul" be carrie" out for the fi:e" ateway

e:chane9 5ncrease MAP functional mo"ules for route en


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carry out efficient networkin# thus shortenin the construction cycle an"

re"ucin the construction cost%

Disa"!antaes of the solution9

5t re


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2enerally# in"epen"ent accountin is re


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resources than the embe""e" echo canceller% 5n particular# the @C is usually

confiure" on the 2MSC eP protocol on the network "o not support the @C processin% 5n thisway# the 2MSC with @CP==? resources "oes not know whether the e:chanes in

the call route ha!e applie" for @C% 5ncorrect ;u"ment will cause e:cessi!e or

insufficient @C resources to be re


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speech call an" one for "ata ser!ice or multime"ia ser!ice% This re


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-% Access to the remote network is recommen"e" for the calls amon operators /a

subscriber of the local network calls a subscriber of other networks3

5n this mo"e# the toll ser!ice a"opts its own toll network# thus achie!in the ma:imumbenefits "urin internetwork settlement%

10.%.& /& (nterworkin'

The 12 &) network is characteri,e" by the separation of the MSC ser!er from the

M2W an" the use of ATM(5P as the transmission bearer% 4ust like &''# the &)

network nee"s the interworkin of the bearer connections an" the con!ersion of the

user plane me"ia stream formats# as well as the echo control an" the interworkin of

control layer protocols% As to the ser!ice interworkin mo"e# &'' an" &) are almost

the same%

=n the whole# the interaction between the 12 &) core network an" the PSTN is

complete" !ia the 5S>P sinalin an" trunk sinalin% 4ust like the tra"itional core

network# 12 &) shoul" be confiure" with a "e"icate" ateway e:chane to fulfill the

interworkin re

chapter 10 huawei wcdma network solution

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