2g drive procedure-140715041309-phpapp01 (1).doc

8/10/2019 2G drive procedure-140715041309-phpapp01 (1).doc

1/23

Drive Test Procedure Part I

Steps followed to perform Drive Test

Physical Verification

Alarm Checking

Freqency Plan Verification

!ardware Configration Verification

Physical Verification

Physical Verification is carried ot "y verifying physical parameter of the #ew

Site with the TSS$ %Technical Site Srvey $eport& sch as Address' (at'(ong' )ilding !eight' Antenna !eight' Antenna Type' *rientation'

Tilt%electrical + mechanical&,

Alarm Verification

Alarms are generated mainly de to nm"er of reasons' and these needs to

checked "efore Drive is "eing carried ot for the Site, Alarms are checkedfrom the #*C %#etwork *perating Centre& and if fond needs to "e verified

"efore drive "eing carried ot,

Frequency Plan VerificationFreqency Plan can "e verified from the #*C %#etwork *perating Centre& for

)CC! and TC! freqencies "eing implemented as per the Site -ntegrationSheet sent to #*C %#etwork *perating Centre&,

Hardware Configuration Verification

!ardware verification is performed to know the Site type' )TS Type' T$.Configration' VS/$ checking ' Power measrement for each T$.,

Following is the procedre and parameters that need to checked while

performing Drive Test for a #ew Site,

CPC %Cell Parameter Check&

0*C %0o"ile *riginated Calls&

0TC %0o"ile Terminated Calls 1 Prepaid to Postpaid&

S0S %Short 0essaging Service&

2P$S


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-ntra Site !andover

-nter Site !andover

T$. Test

-dle Drive %#ormal Drive + Freqency (ock Drive&

Dedicated Drive

Drive Test Procedure Part II

CPC %Cell Parameter Check&

2iven are the parameters that need to "e checked while performing CPC,C2- %Cell 2lo"al -dentity& consists if 0CC3#CC3(AC3C-

)CC! Freqency)S-C

2S0 )and

Definitions4
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Time:-t is system time of compter,

Cell name4 -t displays the name of the sector which is serving according to

the cellfile that is loaded in T50S,

CGI :-t stands for the Cell Global Identity which is niqe for every sectorof the site, -t consists of 0CC'0#C'(AC'C-,

0CC4 obile Country Code6 1 777 0#C4 obile !etwor" Code # $ %%

(AC 4 &ocation Area Code # '())*)C-4 Cell Identity6 1 899:9

Cell 2P$S Spport4 Tells sector is having 2P$S or not, Vales are ;es or#o ,

)and 4 -t tells in which Freq, )and mo"ile is operating e,g, 2S0 766< =>66,

)CC! A$FC#4 -t tells "y which )CC! is the mo"ile station getting served,

TC! A$FC#4 *n which Traffic Freq, call is going on,

)S-C %)ase Station -dentity Code& 4 -t is com"ination of !etwor" ColorCode +!CC, +# $ -, . /ase 0tation Color Code +/CC, +# $ -,1 e,g, 8?,

-t is decoded "y mo"ile on every Sync, Channel 0essage,

0ode4 -t is shows in which state is mo"ile operating'Idle2 3edicated .

Pac"et1

Time slot4 *n which time slot of crrent TC! call is going on, Vi@, time slot

no, of T$.,

Channel Type4 Type of channel mo"ile is getting now, &i"e /CCH 4

03CCH45 6 0ACCH4C5 or C/CH 4 TCH4F 6FACCH4F 60ACCH4F1

Channel 0ode 4 Shows mode of coding like Speech Fll $ate of !alf $ate,

Speech Codec4 -t shows F$ for Fll $ate' !$ for !alf $ate + 5F$ for

5nhanced Fll $ate,

Ciphering Algorithm 4 -t shows ciphering algorithm sed "y the system toprotect data for privacy, 5,g, Cipher "y A9


4/23

!opping Channel 4 -t shows that crrent sector is having hopping featre or

not, Vales are ;es or #o,

!opping Freqencies 4 -t displays no, of freq, on which mo"ile is allowed to

hop, vi@, 0A (ist for hopping of that sector,

0o"ile Allocation -nde *ffset %0A-*&4 -t is the nm"er which tells fromwhich freq, from given 0A list for sector hopping has to "e started, 5,g, 6

means sector will start from first freq, to hop,

Ho77ing 0equence !umber +H0!, :-ndicates seqence in which

freqencies are allowed to hop from the 0A (ist, 6B 8:, 6 for Cyclic !opping'= 1 8: random hopping seqences,

Drive Test Procedure III

8C and TC

2iven are parameter need to "e checked while performing 0*C and 0TC

$. (evel %B d"m to B==6d"m&

$. Eality %6 to &

SE- %?6 to :6&

DT.

!S# %!opping Seqence #m"er& %6 to 8:&

0A-*

!opping Freqency

C< - $atio %=9 d"m&

C< A $atio %=? d"m&


5/23

Definition of $adio Parameters4

$(ev 4 $eceiving level in terms of d)m that mo"ile is receiving from thesite, 9ange of '*# d/m to '#d/m1

$Eal 4 Eality of voice which is measred on "asis of )5$, $ange of

$Eal 6 B,

F5$ 4Frame ;rror 9ateit represents the percentage of frames "eingdropped de to high nm"er of nonBcorrected "it errors in the frame, -t isindication of voice qality in network,

)5$ Actal 4 9atio of the number of bit errors to the total number of

bits transmitted in a gi


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strength of the crrent serving cell and the signal strength of ndesired%interfering& signal components, -t shold "e atleast 7,

0S Power Control (evel 4 Displays range of power control from 6 to >

depending pon network design, 5,g, 6 means no power control and =

means level that is defined "y operator vi@, ? d)m less acc, To airtel,

DT. 4 3iscontinuous transmission +3T=,is a mechanism allowing theradio transmitter to "e switched off dring speech pases, This featre

redces the power consmption of the transmitter' which is important for

0Ss' and decreases the overall interference level on the radio channelsaffecting the capacity of the network,,

TA 4 Vale that the "ase station calclates from access "rsts and sends to

the mo"ile station %0S& ena"ling the 0S to advance the timing of its

transmissions to the )S so as to compensate for propagation delay, Vale of6 means 0S in radis of 996mt, From )S,

$( Timeot Conter %Cr& 4 This parameter define the maimm vale of the

radio link conter epressed in SACC! "locks, $ange of 1 8 in step si@e of, it shows crrent vale of $(T, Decrease "y = "t increase "y ?, /hen it

reaches @ero it reslts in normal D$*P Call,

$( Timeot Conter %0A.& 4 This parameter define the maimm vale of

the radio link conter epressed in SACC! "locks, $ange of 1 8 in stepsi@e of , it shows crrent vale of $(T, #ormally =8' ?6' ?,

0S )ehavior 0odified 4 This window shows crrent settings for the mo"ilestation' for instance whether handover is disa"led or mlti"and reporting

ena"led,

Drive Test Procedure Part IV

GP90 +General Pac"et 9adio 0ystem,

This is performed to check whether 2P$S is working on the Site, This is done"y "rowsing a we" page in "rowser of the phone, For 2P$S to "e checked it

isnecessary to see that the handset is /AP' 2P$S ena"led,


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Intra Site Handover

Intra Handover is performed to check whether handover is taking place both ways

on the Site.Handover is performed among all the Sectors of the Site.

Inter Site Handover

Inter Handover is performed to check whether handover is taking place both ways

on the Site with its adjacent neighbor. Handover needs to checked mandatorarilyfor primary neighbor.

Handover is performed with all the defined neighbor's in the integration sheet.
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Drive Test Procedure Part V

T9= Test

T$. Test is done to check whether calls originated are "eing handled "y all

the T$.Hs, Call made dring the process is tracked "y the 0A-* nm"erdisplayed on the screen for all the T$.Hs,

5,g, for Site of configration 8 T$. per sector the 0A-* vales for T$. testshall "e 6'='?':', Call can "e originated on the )CC! or the TC!

freqencies, !ence 0A-* vales will "e reflected only for calls on TC!freqency and not on )CC! freqency,

Drive Test Procedure Part VI

Idle 3ri


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Freqency (ock Drive

#ormal Drive

This is done to frame the potential area of the new site planned, -t also helps

s to get to know the important neigh"oring sites for which the handoverhas to take place,

Freqency (ock Drive

This is done "y locking the )CC! freqency of the serving cell andperforming the drive for the same cell nless the mo"ile enters into #o

Service 0ode, This is seB fl for making decision related to 2S0 antennaheight' tilt' and orientation,

3edicated 3ri


10/23

7B Do not drive away too mch from the site,=6B Drive in to the Site passing throgh the cltter as well as crossing the

cltter==B Try and drive many roads close to the site nless the cltter is so

important,

=?B Try to avoid driving the same road twice,=:B Do not drive over a "ridge or in to a tnnel inside a cltter area'

otherwise take that parts of data a ot of the data file collected for thiscltter,

=B 0ake short calls and (ong calls' Short calls is the average dration "y

cstomers' short calls are to know whether calls will srvive the setp andthe termination sccessflly' it also determines the setp timeL

=9B (ong calls are to test the hand over capa"ilities,=8B AdKacent channels are channels with coverage of 7d" more than the

serving cell,

=B The coBchannel interference is interference from channels havefreqency lower the serving channel,

=>B For the adKacent channel yo cold "e served from this adKacent channel"t the system can not read it and it gives the name of another channel

=7B The 8 neigh"oring cells are those who are listed in the scan list these donot mean that these are the only channels that the phone can see,

?6B ;o have to make sre of the vales yo are getting ot of the srveying

eqipment do actally make sense,?=B Jnow the eact power ot of the antenna' 5$P level' %5ffective $adiation

Power&,??B 5verything a"ot the antenna conditions' dring the test time shold "e

reported in the final report,?:B /eather conditions shold "e reported as well,?B Jnow the distance and direction of any "ildings "locking yor way,

?9B Finally' report all sorts of pro"lems,

Handover Success Rate (HOSR):

-f !*S$ will "e good TC! drop will also "e good,-f !andover sccess rate degrades call drop rate will take place,

9easons for Poor H809:

-mproper #eigh"or planning,C*B)CC!B)S-C isses in #eigh,

Parameter Check,

!S# clash,


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S( vale,(AC "ondary,

DAC vale mismatch,Syn mismatch,

*vershoot,

!/ -sses,(ow Coverage

0olutions for remo


12/23

Check (AC "ondary,!igh fail takes place there will "e -nter )SC cells,

!igh fail takes place there will "e -nter 0SC cells,Define proper (AC in neigh cells,

H> Issues:Clear !/ isses,

Check T$.s,Check otages,

Check )*-A Card, )ecase if it is falty incoming and otgoing !* will "e

fail,

Clear 9e7orts:

Clear M5AT,

Clear 86,Clear 8,

Clear 8=,

9e7orts for H809 :

=9: reports for !* fail "w two cells,=9 !* analyses,

86 for discrepancy,8 for Sync report,

8= for one way neigh,

M5AT for C*B)CC!B)S-C neighs

for !* definition report,M5(* for inter 0SC !* report,=96 for high !* fail,

=9 for high !* attempt and call ratio,

=9> for intra )SS !* o"servation,8? for AdK cell having same or adK freq,

TCH Blocking

/hen TC! is not allocated to the ser after SD allocation' it is TC! )locking,-t is the failed call attempts which the 0S ser can notice,

-t takes place de to lack of TC! $esorce,

9easons for TCH /loc"ing:


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Some of them areB!igh Itili@ation of TC!

Time slot falty,(ock T$.s,

!/ Pro"lem,

0olutions for remo


14/23

5ffective tilt shold "e check,0ont position shold "e check

Im7ro:Check Alarms on site,

Check T$.s,

Check Slips,Check the !opping plan,

Check ))?F card,Check VS/$'

Path im"alance,

Connector Connection,Check T0A

9e7orts for TCH 3ro7:

=8: for TC! Drop

M5*( for alarms,MA!P for Flicks,

?:? for TA report,?6> Path -m"alance report,

?6 for )TS report,

?=8 for all parameter,=78 for I(BD( El,

8? for AdK cell having same or adK freq,


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OT:

* R+lev access ,in (R-P): With this parameter we define the minimm power level an !S has

to receive before it is allowed to access the cell. "ange: #$$%..#& (d)m*

+efalt: #$%,

**Radio link ti,eout (R.T):With this parameter we define the ma-imm vale of the radio

link conter e-pressed in S//H blocks.

"ange: &..0&1 with step si2e of & +efalt: 3%

TCH /ssign,ent

-tHs a process of "y which TC! is assigned to the 0S, After the SD reqest

0S gets TC! sccessflly and the call transfers to TC! it means TC!

assignment is sccessfl,For the "est JP- TC! assignment shold tend to =66G,

-t degrades de to !/ pro"lems,

9easons for TCH Assignment failure:

!ardware Falt%T$.s'Com"iner'Dpleer'Ca"les&VS/$

!igh Path (oss,Falty T0A,

!igh TC! )locking,

(oose connections,D$ "eing sed etensively

0olutions for remo


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SDCCH Dro'

/hen we assigned SD for call origination and at that time de to somepro"lem or any mismatch comes "y which SD loss occrs' it is called as SD

Drop,

-t occrs "etween allocation of SD and "efore TC! allocation, Sometimes SDdrop occrs "ecase qeing is not activated in the system,

-f SD drop is high pl@ look on parameters likeovershooting' shift the SDtimeslot ' may "e hardware isse' interference' change the vales of $.P'

P0A.' may "e isse of plink or downlink isse in that cells for I( pt a T0A

in that cell and for D( provide tilt 're orient that antenna,

If 03 3ro7 is high:-f SD drop is high pl@ look on parameters likeB

*vershooting

Shift the SD time slot!ardware isse

-nterferenceChange the vales of $.P P0A.

-t may "e plink or downlink isse in which cells for I( pt a T0A in that cell

and for D( provide tilt $e orient that antenna,

9easons of 03 3ro7:!ardware Falt,

-nterference,

0A-* mismatch,)ad Coverage,

!igh T$ Fail,*tage,

*vershooting,A"is Drop,

!igh Path (oss,

/rong Parameter Planning,De to -C0 )and%CD0A&

!igh (APD Itili@ation!eavy "locking and D$ featre "eing sed etensively

0olutions for remo


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Interference:

Check the )CC! Plan %C


18/23

Some times yo will find isses on )CC! T$.,-n this case )CC! shift fromone to other T$. will redce SD drop,

Chec" for 7arameter:

Check the Timer T :=6=

Check the Timer T ?66%?6ms&T== 5pired%=6 s&

0A-* check,

?seful 9e7orts for 03 3ro7:Ise report M5*( to find the alarms,

Ise ?6> for Path loss analysis,Ise =78 for I(BD( -nterference,

Ise =8: report for SD drop,

Ise report ?=8 for detail SD Drop,?:? report for TA report,

8? for AdK cell having same or adK freq,#D === for freq plan,

?6 for )TS and cell report,

Blocking and Congestion

3ifference /etween /loc"ing and Congestion:

-t is very important to know difference "etween "locking and congestion,Some people think that "oth are same' "t they differ from each other, -f allthe SD resorces are fll and not availa"le for SD assign then its come into

congestion, -f at a particlar time call is attempted and it fails then it knownas )locking,

SDCCH Blocking

SD "locking means that yo are not getting SD resorce for the call

origination, /hen 0S connects with #/ then $AC! and A2C! are provided,After A2C!'SDCC! is provided "t if SDCC! is not provided at this time de

some pro"lems or de to navaila"le of SD "y )SC 'itHs called as SD)locking, There are no of reasons for that,-f sch a case arises the cstomer

will not "e a"le to originate any call,

9easons for 03 /loc"ing:


19/23

Some of them areB

(AC "ondary,

!/ Pro",

0olutions for remo


20/23

/:C7rogram ?ilesC5ricssonC65!S 7rodctsC65!S InvestigationCpplication ?older. ,#=ow open

the 65!S window from. !y +ocmentsC65!S 7rodct ?ilesC65!S Investigation

@.$CWorkspaces. In workspaces folder yo have to open Investigation W/+! ;S!. fterinstalling device drivers1 /opy and 7aste above patch files in

9or # Investigation:

?or 3; Investigation o have to open & windows.. $#;S! radio parameter 3#;S! crrent

channel A#;S! servingD=eighbor vents ?irst A windows is open from above toolbar

7resentation#;S! nd last window is open from 7resentation# Signalling #5vent =ow connectthe device by pressing the ;reen btton(/onnect all* or by pressing ?3 btton

9or # Investigation:

?or 3; Investigation

9or Investigation 5CDM/(8) and SM(#) ;ot" i7e in Dual ,ode:

?or Investigation W/+!(A;* and ;S!(3;* both i.e in +al mode long with & window of

;S! yo have to open A window more and they are.... $#HS+7 analysis 3#W/+! radio

parameter A#W/+! ServingE ctiveD=eighbrs 6he $ st window i.e HS+7 analysis is sedonly for data call.. nd remaining 3 is sed for W/+! analysis.


?or Investigation W/+!(A;* and ;S!(3;* both i.e in +al mode


?or Investigation W/+!(A;* and ;S!(3;* both i.e in +al mode 6he above window shows

that yo are latch in A;networkF +ring A; network all the parameters in the 3; window are

blank..

ITROD6CTIO:

I=6"8+9/6I8= W /+! !eans Wideband /ode +ivision !ltiple ccess. Wideband /ode+ivision !ltiple ccess is a /+! channel that is for times wider than the crrent channels

that are typically sed in 3; networks. Wideband /+! has a bandwidth of , !H2 or more . It

is also called A; system1 allow for faster data transfer than ;7"S and 5+;5 and also let yotalk while yo transfer data .
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.OIC/. CH/.S:

>8;I/> /H==5>S 6here are three available common control channels )roadcast control

channel ()//H* 7aging channel (7/H* ?orward access channel (?/H* )roadcast controlchannel ()//H* carries system and cell specific information. 7aging channel (7/H* for

messages to the mobiles in the paging area. ?orward access channel (?/H* for massages fromthe base station to the mobile in one cell. In addition1 there are two dedicated channels Dedicated control c"annel (DCCH)covers the two dedicated control channel stand#alone

dedicated channel (S+//H* and associated control c"annel (/CCH).Dedicated tra IHO6RS:


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W/+! S5"4I=;E/6I45 S56 D =5I;H89"S 6his windows shows the Serving cell

=eighbors S : ctive Set !=: !onitered =eighbors +=: +ominant =eighbors

HSDP/ TSTI :

HS+7 65S6I=; It shows the Speed of HS+7 We consider Same window of HS97

nalysis for the Speed 6esting of HS97

HSDP/=HS6P/ TSTI I 9TP SRVR:

HS+7EHS97 65S6I=; I= ?67 S5"45"We find ot the ccrate verage Speed of

HS+7E HS97 throgh ot the ?67

HSDP/=HS6P/ TSTI:

HS+7EHS97 65S6I=;

HSDP/=HS6P/ TSTI:

We also check the speed of HS+7EHS97 throgh =et7erSec1 for this we check /rrent speed

verage speed and !a-imm speed of HS+7 HS97 HS+7EHS97 65S6I=;

RT6(RMOT .CTRIC/. TI.T 6IT):

"569("5!865 5>5/6"I/> 6I>6 9=I6* 6wo /ables are connected in "569 +-$ /able6ilt !onitor /able "56 9nit is monitered from "=/ to ma-imi2e or minimi2e 5lectrical 6ilt.

!inimm tilt shold be % !a-imm tilt shold be $% We have also pdate the type of antenna

in "=/ i.e. single band1 dal band or tri band antenna. lso one 7ower Switch is in "56 9nit.

9pper press is 8= +own 7ress is 8??

RT6(RMOT .CTRIC/. TI.T 6IT):

"569("5!865 5>5/6"I/> 6I>6 9=I6*

Handover in 6MTS or 5CDM/:

Handover in 9!6S or W/+! 6here are A basic types of handover Intra freBency handovers

Handovers between 3 9!6S carriers at the same freBency 6hese can be soft handovers Inter
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23/23

freBency handovers Handovers between 3 9!6S carriers at different freBencies 6hese are

hard handovers Inter system handovers Handovers between 9!6S and ;S! carriers 6hese are

hard handovers 6hese Handover also knows as I"6 Handover

TH/? @O6:

6H= 89

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