idt_ _short final.pdf

8/18/2019 IDT_ _short final.pdf

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IDT Report

TRAI 1

Analysis of the Network Performance of the Telecom Service

Providers in Mumbai and Delhi

Background

1. TRAI is regularly monitoring the performance of Telecom Service Providers (TSP) against the

enchmar!s for the various "uality of Service ("oS) parameters laid do#n y the Authority. TSPs sumit

Performance $onitoring Reports to TRAI every %uarter.

&. TRAI also underta!es audit and assessment of "uality of Service through independent agencies

to verify the "uality of Service claimed. The Audit agencies conduct sample 'Drive tests across various

cities all over the country as part of audit and assessment of the TSPs performance. The audit reports of

these agencies are pulished on the #esite of TRAI.

. In vie# of complaints on call drops and other net#or! issues* on ehalf of TRAI* an independent

Drive Test (IDT)#as conducted y $+s T,- S,D on

a. &rd

and &th

/une &01 covering various locations in South and 2entral $umai. The

performance of Idea* Airtel* -odafone* Reliance (3S$)* Aircel4 Tata(3S$) #as

monitored5

. 6th to 11th /uly &01 covering various locations in South Delhi* 2entral Delhi and 7est

Delhi. The performance of Idea* Airtel* -odafone* Reliance (3S$)* Aircel 4 Tata(2D$A)

#as monitored.

. A team from the TRAI 8" #as present for these Drive tests during these days. 9or the purpose

of these tests* only 2GBTS #ere covered.

. The test results otained from these drive tests are presented to e:plain the net#or! condition

in terms of Radio 9re%uency (R9)2overage5 R: "uality5 Accessiility5 Retainaility5 and 2arrier to

Interference ratio. ;f these parameters* performance enchmar!s have een prescried y TRAI or the

<icensor for R9 2overage5 R: "uality5 Accessiility and Retainaility. 8o#ever* for a comprehensive

e:amination of the net#or! %uality* the parameters relating to 2arrier over Interference have also een

added.

What is a Drive Test?

=. Drive Test is a test performed to evaluate the performance of various cellular net#or!s onpredetermined parameters. A Drive test is performance oriented and therefore technology neutral.

>. A Drive test is conducted y driving a vehicle at a steady speed over the selected route. The

vehicle carries the testing e%uipment #hich measures the !ey performance indicators (?PI)y

repeatedly ma!ing calls* estalishing the call* recording the %uality of connection* measuring dropped

calls* etc. in accordance #ith the predetermined parameters.



IDT Report

TRAI

RF DRIVE TEST IN MMB!I

2"rd

!ND 2#th

$une 2%&'



IDT Report

Target Network:1. The target net#or!s for t

(3S$).

Mu()ai *irc+e

Population

Area

Population Density

Mu()ai *it, Ma- is sho.n )e+o./

1http++maps.google.co.in

he IDT #ere BIdea* Airtel* -odafone* Reliance (3

Ta)+e & *IT0 DEM1GR!3I*S

Detai+s

1*0*000

=0 S%uare ?m

&6*=0 People per S%uare ?m

Ta)+e 2 Mu()ai *it, Ma-&

TRAI

S$)* Aircel 4Tata



IDT Report

TRAI

&. The numer of ETS count and the suscrier ase of the target net#or!s are given elo#

;perator Technology Eand ($8C) ETS 2ount SuscriersF

(Prepaid G

Postpaid)

Suscriers + ETS

Aircel 3S$ 1@00 1@&6 &@01> 1>

Airtel 3S$ 600 4 1@00 0 010> 66

Idea 3S$ 1@00 @ >>1>= 1=6

Reliance (3S$) 3S$ 1@00 &1>@ &@1&11&6&

Tata(3S$) 3S$ 1@00 &@@= &&@1=6 @1

-odafone 3S$ 600 4 1@00 1& @=&0&1 1611

FSuscriers data of $umai circle on 1 $arch &01 ta!en from 2SD audit.



IDT Report

Drive Test Route

. The total Drive test route

covered included *o+a)a4 *hurch

elo# depicts the route that #as f

Peddar Road

Navy Nagar

Malabar Hill

overed over the t#o days #as appro:imately "%%

ate4 !ndheri4 Ma+ad4 Ghatko-ar4 5okhand.a+a

llo#ed during the $umai Drive test.

Ghatkopar

Govandi St

TRAI =

k(s. $aHor areas

6 $uhu. The map

tion Rd



IDT Report

TRAI >

Drive Test Schedu+e

. The test #as performed from 0600 hrs. to 160 hrs. to cover pea! and offBpea! hours. In all

aout 0 calls #ere made for all the = operators.

. The tests #ere conducted as Eenchmar!ing tests aimed to compare the performances of thevarious net#or!s for the same parameters and against the same enchmar!s for comparaility. The ?ey

Performance Indicators recorded #ere R9 2overage ()*Accessiility ()* Retainaility()* $oility ()*

R: "uality()*2arrier over Interference().

A. RF Coverage rate

=. Radio Frequency (RF) Coverage relates to the geographical footprint within an area that has

sufficient RF signal strength to allow for a call/data session. The R9 2overage rate of an operator is

calculated on the asis of of samples in #hich the receive level (R:) is etter than 78' d)(at street

level. The test results otained in $umai on the drive test route (appro:. 00 !m) are as follo#s

;perator2overage Rate

R: <evel 0 to B@dEm

2overage Rate

R: <evel 0 to B6dEm

Aircel 6.= 66.=0

Airtel 6.1 66.&6

Idea 6.0 66.6@

Reliance (3S$) @6.6 6@.

Tata(3S$) 6>.0> 66.>=

-odafone 61.0@ [email protected]

>. As per the drive test report* the coverage along the selected route of a++ the o-erators #as

found to e satisfactory.

B. Accessibility

@. Accessibility is the aility of a user to otain the re%uested service from the net#or!.

6. Accessiility is monitored y measuring the 2all Setup Success Rate (2SSR).The 2SSR is

defined as the ratio of Jstalished 2alls to numer of 2all Attempts. 7hen a user KAL initiates a call

to user KEL in the same net#or!* a Stand Alone Dedicated 2ontrol 2hannel (SD228)is allocated for

setting up the call. ;nce the call is setup* a Traffic 2hannel(T28) is allocated for the call. Mon

availaility of control channel or traffic channel #ill lead to congestion #hich is measured through

the SD228 congestion and the T28 congestion. The SD228 congestion and T28 congestion are

monitored through the 'Eloc!ed 2all rate parameter in the Drive test.



IDT Report

TRAI @

10. TRAI has laid do#n the "oS enchmar!s for *SSR 9:';< SD**3 congestion at &; and T*3

congestion at 2; respectively Nthe )+ocked ca++ rate at ";O.The test results otained are as follo#s

;peratorTotal 2all

Attempts

Total 2all

Success

Total 2alls

Eloc!ed

Eloc!ed

2all Rate

()

2SSR ()

Aircel 0 &= & .= 6.=

Airtel &6 1 1= .0& 6=.6@

Idea >0 1 > 10.00 60.00

Reliance (3S$) > 6= 1>6 1.1 =@.@>

Tata(3S$) = &1 & .@ 6.&

-odafone 1 &1 .6 6=.0>

11. As per the drive test report* none o= the o-erators have met the prescried >oS )ench(ark =or

)+ocked ca++ rate and the -er=or(ance o= t.o o= the o-erators is =ound to )e ver, -oor

C. Retainability

1&. Retainaility is the aility of a service* once otained* to continue to e provided under given

conditions for a re%uested duration. During the Drive test* Retainaility is measured y ma!ing a call

from user A to user E and after the call is successfully setup* holding the call for a duration of 60 sec+

1&0 sec. If the call drops during this period it is considered to e a dropped call. The 2all Drop Rate

(2DR) parameter gives a reliale measure of the aility of the moile net#or! to maintain a call once it

has een correctly estalished. TRAI has laid do#n the "oS enchmar!s for ca++ dro- rate to )e +ess

than2; The test results otained for this parameter are

;peratorTotal 2alls

Jstalished

Total 2alls

Dropped2all Drop

Rate

Retainaility

Aircel 1> .16 6=.@1

Airtel 1 0.6> 66.0

Idea 0 0 .= 6.

Reliance (3S$) 6 6 &.&6 6>.>1

Tata (3S$) &= &6 .1 6.6

-odafone 6> & .@ 6.1>

1. As per the drive test report* e@ce-t =or one o-erator4 no other o-erator is (eeting the

-rescri)ed )ench(ark



IDT Report

TRAI 6

1. The specific reason for a call drop in a particular case cannot e determined during the drive test

or from the test results themselves. The common reasons attriuted for call drops are given elo#.

a. Spectrum related issues such as limited spectrum or unavailaility of spectrum5

. 2overage gaps5

c. Inade%uate capacity in a ETS5

d. Interference issues caused y illegal repeaters* private #ide and repeaters* and other

#ireless devices5

e. J%uipment failure* transmission media fluctuations+ disruptions.

D. Mobility

1. In a cellular system a ase station has only a limited coverage area. 8ence it is possile for a

moving suscrier to e out of range of a ase station #hile ma!ing a call or during a call. The process

y #hich a moile telephone call is transferred from one ase station to another as the suscrier

passes the oundary of a cell is called a 8andover. A 8andover success rate (8;SR) more than 6 is

considered to e good. The various operators performance oserved during the Drive Test #as

;perator Total 8; AttemptTotal 8;

Success8; Success Rate

Aircel >6 >>0 6=.@=

Airtel 1&@ 1&1> 6=.>

Idea 6@ 6= 6>.@>

Reliance (3S$) 100 6@ [email protected]

Tata(3S$) 1 1=6 6.0

-odafone 1>0 1>0> 6>.

1=. As per the drive test report* a++ o=the o-erators are meeting the enchmar!.

E. Rx Quality

1>. 9or measuring voice %uality* R: "ual samples on a scale from 0 to > for 3S$ operators are

measured. As per the TRAI "oS norms* R: "ual et#een 0B for 3S$ operators is considered to e

good* #hereas R: "ual eyond this enchmar! is considered to e poor. TRAI has set do#n the "oS

norm re%uiring connections #ith good voice %uality to e 6. Accordingly the R:"uality is determined

and as can e seen from the tale elo#

;peratorR: "uality Samples

(0B>)

R: "uality

Samples (0B)

R: "uality Samples

(0B)

Aircel =>=@> >61>> @.=0

Airtel =>=06 =1= 61.11

Idea =6@00 =1>@6 @=.=

Reliance (3S$) >>1> 60=@& @.

Tata (3S$) >1106> ==1 @6.0

-odafone =00& >@=0 @6.=

1@. As per the drive test report* none o= the o-erators are (eeting the -rescri)ed )ench(ark.



IDT Report

TRAI 10

F. Carrier over nter!erence "C#$

16. The carrierBoverBinterference ratio see!s to test the level of optimisation of the signal strength

of a net#or!. It is the ratio et#een the levels of the signal strength of the current serving cell to that of

the signal strength of undesired or interfering signal components. The measurement range e:tends from

0 dE to 0 dE. A 2+I elo# dE #ould normally result in a dropped call. The 2+I values et#een 6 and 1is acceptale5 #hile values et#een 1 and 0 are considered good.

&0. Mo specific "oS Eenchmar! has een laid do#n for 2+I. The performance of TSPs is given elo#

;perator 2+I Samples (1B0) 2+I Total Samples2+I Samples (1B0)

Aircel &>=0 6&=1 [email protected]

Airtel 606=0 1011 =.@

Idea 1=6@60 &@= ==.=>

Reliance 1060> 6& @.

Tata &=11@ >>@ =6.>

-odafone 10=0 1=1=@0 =.&

%verall %&erator Analysis

&1. The results of these ?ey Performance Indicators is summarised in the tale elo#B

?PI Aircel Airtel IdeaReliance

(3S$)

Tata

(3S$)

-odafone

2overage 6.= 6.1 6.0 @6.6 6>.0> 61.0@

Accessiility 6.= 6=.6@ 60.00 =@.@> 6.& 6=.0>

Retainaility 6=.@1 66.0 6. 6>.>1 6.6 6.1>

$oility 6=.@= 6=.> 6>.@> [email protected] 6.0 6>.

R: "uality @.=0 61.11 @=.= @. @6.0 @6.=

2+I [email protected] =.@ ==.=> @. =6.> =.&



IDT Report

TRAI 11

!na+,sis o= the RF drive re-ort

&&. The overall performance of the TSPs* as determined y the independent audit agency* is

summed up elo#

AI !irce+ !irte+ IdeaRe+iance

GSMC

Tata

GSMCVoda=one

*a++ !tte(-t 0 &6 >0 > =

B+ocked *a++ Rate

";C#"; "%2; &%%%; "&&"; #'8; ":";

*a++ Setu- Success

Rate 9:';C

6.= 6=.6@ 60.00 =@.@@ 6.& 6=.0>

Dro--ed *a++ Rate

2;C.16 0.6> .= &.&6 .1 .@

R@ >ua+it, %7'C

9:';C@.=0 61.11 @=.= @. @6.0 @6.=

3andover Success

Rate 9:';C6=.@= 6=.> 6>.@> [email protected] 6.0 6>.

&. The Drive test resu+ts revea+ed that (ost o= the o-erators are not (eeting the )ench(arks o=

the net.ork re+ated -ara(eters The, =ai+ed to achieve the )ench(arks due to 3igh B+ock *a++ Rate4

3igh Dro- *a++ Rate4 5o. *a++ Setu- Success Rate 6-oor R@ >ua+it, 3o.ever4 as (entioned ear+ier4this resu+t re=+ects on+, the net.ork conditions on the route =o++o.ed ), the Test vehic+es and as

deter(ined during the da, and ti(e o= the Drive test



IDT Report

Target Network1. The target net#or!s for th

(2D$A)

De+hi *irc+e

Population

Area

Population Density

De+hi *it, Ma- is sho.n )e+o.

& ###.mapsof#orld.com

e IDT #ereB Aircel* Idea* -odafone* Airtel* Relian

Ta)+e & *it, De(ogra-hics

Detai+s

1.=@ 2rores (2ensus &011)

1@ S%uare ?m

11*&0 People per S%uare ?

Ta)+e 2 De+hi *it, Ma-2

TRAI 1

e (3S$) and Tata

m



IDT Report

TRAI 1

&. The numer of ETS count and the suscrier ase of the target net#or! are given elo#

;perator Technology Eand ($8C) ETS 2ountSuscriersF (Prepaid

G Postpaid)Suscriers + ETS

Aircel 3S$ 1@00 >6 06>@ 10

Airtel 3S$ 600 4 1@00 6@@ 106=60 1>=

Idea 3S$ 1@00 @0 60=& 1&

Reliance 3S$ 1@00 &6 &1@

Tata 2D$A @00 1== &=&= 1>6>

-odafone 3S$ 600 4 1@00 =11 6@@@ 1=@

FSuscriers data of Delhi circle in 1 $arch &01 ta!en from 2SD audit.

Drive Test Route

. The total Drive test route covered #as appro:imately "%% k(s. $aHor areas covered included

*onnaught +ace *C inner and outer circ+e4 India gate4 5ut,ens one4 *hank,a-uri4 South *a(-us4 IIT4

!IIMS4 De+hi *antt4 De+hi Gate4 Dar,aganH and di==erent -arts o= South and West De+hi The map elo#

depicts the route that #as follo#ed during the Delhi Drive test.

Drive test route o= Ne. De+hi

Sadar Baar



IDT Report

TRAI 1

Drive Test Schedu+e

. The test #as performed from 0600 hrs to &00 hrs* to cover oth pea! as #ell as offBpea! hours.

In all aout =&= calls #ere made for all the = operators.

. The ?ey Performance Indicators recorded #ere R9 2overage ()*Accessiility ()*Retainaility()* $oility ()* R: "uality()*2arrier over Interference() in the Delhi IDT is e:plained

elo#.

A. RF Coverage rate

=. The test results otained in Delhi on the drive test route (appro:. 00 !m) are as follo#s

;PJRAT;R 2overage Rate N0 to B@dEmO 2overage Rate N0 to B6dEmO

Aircel >.& 6=.0=

Airtel 61.&= 66.6=Idea @>.& 6@.=

Reliance >.6= @=.10

Tata(2D$A) @.0> @&.1&

-odafone @>.&6 [email protected]

>. As per the drive test report* the coverage =or a++ the o-erators e@ce-t one is -oor

B. Accessibility

@. The test results otained are as follo#s

;peratorTotal 2all

Attempts

Total 2all

Success

Total 2alls

Eloc!ed

Eloc!ed 2all

Rate ()2SSR ()

Aircel 1 &@ 1 &.6 6>.0

Airtel @> 6 @.1@ 61.@&

Idea >@& >@ &@ &=.06 >.61

Reliance =0 0 1 10. @6.

Tata(2D$A) >& >1 &0 1.11 6@.@6

-odafone 60 => && .=6 6.1

6. As per the drive test report* (ost o= the o-erators have not (et the -rescri)ed >oS

)ench(ark =or )+ocked ca++ rate and the -er=or(ance o= three o= the o-erators .as =ound to )e ver,

-oor



IDT Report

TRAI 1=

C. Retainability

10. The test results otained for this parameter are

;peratorTotal 2alls

Jstalished

Total 2alls

Dropped2all Drop Rate () Retainaility ()

Aircel & && .1@ 6.@&Airtel @.0 61.6=

Idea @@ 11 &.@ 6>.1=

Reliance @ 6 1>.&6 @&.>1

Tata(2D$A) >1 = 0.@ 66.1=

-odafone => &0 .&@ 6.>&

11. As per the drive test report* e@ce-t =or one o-erator4 none o= the o-erators are (eeting the


D. 'obility1&. The performance of the various operators oserved during the Drive Test #as

;perator Total 8; Attempt Total 8; Success 8; Success Rate

Aircel =& =@ 6>.@

Airtel 10@ 101 6.6

Idea 1&@ 1&1 6@.=

Reliance >6 >>0 6=.@=

Tata(2D$A) >= >&0 6.1&

-odafone 1=@ 1&@@ 6.1

1. As per the drive test report* t.o o= the o-erators are not (eeting the )ench(ark

E. Rx Quality

1. The R: "uality for the operators are as sho#n in the tale elo#

;peratorR: "uality

Samples (0B)

R: "uality

Samples (0B>)

R: "uality Samples (0B)

Aircel @1=@> @&11 @&.=6

Airtel 0>&> =01=06 @.&

Idea &611 @0&> 61.1&

Reliance 1>0 @==> @.=

Tata(2D$A) @>=@>> @>6>& 66.=@

-odafone 660=& 0&>& 60.=>

1. As per the drive test report* none o= the o-erators e@ce-t one o-erator are (eeting the




IDT Report

TRAI 1>

F. Carrier over nter!erence "C#$ (

1=. The performances of TSPs on this parameter is given elo#

;perator 2+I Samples 2+I Total Samples 2+I Samples ()

Aircel &11>= 6=@ .=

Idea &0>&> >1 =0.0

-odafone &10&60 > @.@&

Airtel 1@=@0@ &=&6& .@&

Reliance 101& &>0&0 .=

Tata(2D$A)BJc+Io @161= 10&6@ >6.6=

%verall %&erator Analysis

1>. The results of the ?ey Performance Indicators are summarised in the tale elo#B

AI !irce+ !irte+ Idea Re+ianceTata

*DM!CVoda=one

2overage >.& 61.&= @>.& >.6= @.0> @>.&6

Accessiility 6>.0 61.@& >.61 @6. 6@.@6 6.1

Retainaility 6.@& 61.6= 6>.1= @&.>1 66.1= 6.>&

$oility 6>.@ 6.6 6@.= 6=.@= 6.1& 6.1

R: "uality @&.=6 @.& 61.1& @.= 66.=@ 60.=>

2+I .= .@& =0.0 .= >6.6= @.@&

In 3S$* the 2+I value is measured through samples having more than 1 to 0. In 2D$A * it is usually measured as

Jc+Io. The Jc+Io is used to measure the for#ard lin! coverage performance.



IDT Report

TRAI 1@

!na+,sis o= the RF drive re-ort

1@. The overall performance of the service providers is as given elo#

AI !irce+ Idea Voda=one !irte+ Re+ianceTata

*DM!C

2all Attempt 1 >@& 60 @> =0 >&

Eloc!ed 2all

Rate ( ).&> @.6= .>1 @.1= 6. &.@0

2all Setup

Success

Rate (6)

6.@& 6>.1= 6.>& 61.6= @&.>1 66.1=

Dropped

2all Rate

(&)

.1@ &.@ .&@ @.0 1>.&6 0.@

R: "uality

(0B) (6)@&.=6 61.1& 60.=> @.& @.= 66.=@

8andover

Success

Rate 6

6>.@ 6@.= 6.1 6.6 6=.@= 6.1&

16. The Drive test resu+ts revea+ed that (ost o= the o-erators are not (eeting the )ench(arks o=

net.ork re+ated -ara(eters The, =ai+ed to achieve the )ench(arks due to 3igh B+ock *a++ Rate4 3igh

Dro- *a++ Rate4 5o. *a++ Setu- Success Rate 6 -oor R@ >ua+it, 3o.ever4 as (entioned ear+ier4 thisresu+t re=+ects on+, the net.ork conditions on the route =o++o.ed ), the Test vehic+es and as

deter(ined during the da, and ti(e o= the Drive test



IDT Report

TRAI 16

SMM!R0



IDT Report&0

1. The issue of call drop is regularly ta!en up y TRAI #ith the 2hief Technology ;fficers (2T;s) of

all the TSPs and certain measures including net#or! optimiCation discussed. They have een advised to

underta!e their o#n Drive tests to effectively optimiCe their net#or!s. 3iven the adverse impact of call

drops on the consumers* the TSPs #ere advised to ta!e initiatives and improve their performance*

including e:ploring suitale compensation for call drops.

&. The TSPs have claimed that follo#ing are the main reasons contriuting to fre%uent call drops

a. Spectrum related issues such as limited spectrum5 delay in allocation of spectrum5

reduction in &3 fre%uency and after the spectrum auction5 and maHor changeover of

fre%uencies #ithin and across the 600 $8C and 1@00 $8C ands on the live net#or!s

for some TSPs.

. Poor coverage due to nonBavailaility of sites for ETS in some areas5 sealing of e:isting

sites5 forced closure of e:isting sites y local odies. During the last si: months around

8%& sites Detai+s at !nne@ure J!KCin $umai and '2" sites Detai+s at !nne@ure JBKCin

Delhi #ere shutBdo#n due to various reasons (sealing of sites y municipal authorities*

R7A*J$9 related issues* o#ner issues).The closure of each site impacts three to four

neighouring sites #hich could result in increased call drops at such locations.

c. J$9 radiation issues causing fear in the minds of general pulic.

d. Interference issues caused y illegal repeaters* private #ide and repeaters* and other

#ireless devices installed y individuals.

. During the last one and half years the independent auditors appointed y TRAI have conducted

around 00 R9 drive tests* each covering aout 00 route ?ms* totalling in e:cess of aout 1.& la!h route

?ms. Thus* all the states of the country have een covered y at least one R9 Drive Test. Eased on these

tests the TSPs are eing+ have een instructed to ta!e necessary action to improve coverage+%uality in

the identified affected areas.

. TRAI is evaluating the need for a consultation paper on 'Regulatory 9rame#or! on 2all Drops*

ased on availale information and facts* discussions #ith TSPs* independent R9 drive tests*

international est practices and other related issues.

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idt_ _short final.pdf

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