Dt notes part 11

IMPORTANT QUESTIONS
WHILE START DRIVE TEST LEARNING, YOU MUST KNOW THE BASIC THINGS!
THESE ALL CONOTENTS ARE AT INTRODUCTORY LEVEL.
1. WHAT IS PHYSICAL VARIFICATION?
2. WHAT INSTRUMENT WE CARRY DURING DRIVE TEST AND FOR WHAT PURPOSE?
3. MECHANICAL AND ELECTRICAL TILT?
4. WHAT ARE THE TYPES OF ANTINA?
5. WHAT IS BEAMWIDTH?
6. WHAT IS ANTINA BEAMWIDTH?
7. RECIEVER LEVEL?
8. RECIVER QUALITY?
9. WHAT IS LOGFILE?
10. WHAT IS THE USE OF MCOM 4.2 ?
11. WHAT IS BCCH & ARFCN?
12. WHAT IS BSIC?
13. FREQ. REUSE?
14. WHAT IS TEMS?
15. HOW MANY VERSION THIS HAVE?
16. WHAT IS THE DIFF.TYPE OF DRIVE TEST?
17. WHAT IS BENCH MARK KIT?
18. WHAT WORK WE HAVE IN BTS?
19. WHAT WORK WE HAVE IN MSC?
20. WHAT IS IDLE MODE AND DEDICATED MODE?
21. WHY WE DO DT IN IDLE MODE AND DEDICATED MODE?
22. WHAT IS EET?
23. WHAT IS AT?
WHAT IS PHYSICAL VARIFICATION?
ACTUALLY THIS IS PRILIMINARY TEST OF DRIVE TESTER IN WHICH THEY TOLD US TO CHECK OR
ADJUST, GSM HEIGHT, DIRECTION, CABLE CONNECTOR, ELECTRICAL TILT OR MECHANICAL TILT.
ANTENNA ADJUSTMENTS:
ANTENNA ADJUSTMENTS SUCH AS ANTENNA TILT AND HEIGHT AFFECTS THE SIGNAL STRENGTH
AND THEREBY THE CELLS BOARDERS AND INTERFERENCE LEVELS.
BY DOENTILTING THE ANTENNAS ,A CALMER BEHAVIOR IS GENERALLY ACHIEVED IN THE NETWORK .THE
SIGANL STRENGTH BECOMES MORE CONCENTRATED TO THE AREA CLOSE TO THE SITE .DOWNTILTING
AN ANTENNA CAN REDUCE THE IN INTERFERENCE IN CO- CHANNEL OR ADJUSTENT CHANNEL CELLS AS
WELL AS IN THECELL ITSELF.
THE MAJOR DRAWBACK OF HAVING TOO MUCH DOWNTILT IS THE RISK OF A LOSS IN OVERALL
COVERAGE.

MECHANICAL AND ELECTRICAL TILT?
AS NAME INDICATES “TILT” , IT JUST LIKE THE SAME THING WHICH WE GIVE TO OUR TABLE FAN FOR
GETTING AIR.THE SAME WE DO FOR GETTING COVERAGE .
OK! IN GSM THERE ARE TWO TYPES OF TILT.
MECHANICAL TILT
ELECTRICAL TILT
ITS DEPEND ON YOUR ANTENNA COMPANY THAT U HAVE TWO TYPES OF TILT OR NOT .SOME COMPANY
HAVE TWO TYPS OF TILT AND VICE VERSA.
OK!
MECHANICAL TILT:
LIKE ITS NAME THIS TILT IS GIVEN BY PHYSICALLY TILTING U R ANTENNA.THE SPECIALITY OF THIS TILT
IS ,IT CONCENTRATE ON PARTICALUR AREA LIKE WHEN WE ARE FOCUSING THE TORCH ON
PARTICAULAR OBJECT ON PARTICAULAR PART THEN WE GET THE DARK PORTION OF THAT AREA.
ANOTHER EASY EX.
IF ANY VILLAGE WE SET UP A SITE .BUT IN THAT PARTICULAR VIL. WE WANT TO GIVE INDOOR
COVERAGE TO MARKET PLACE FIRST , THEN FOR ANOTHER PART OF THAT VIL. OUTDOOR COV. THEN
WE WILL FOCUS OUR GSM TOWARDS MARKET PLASE BY GIVING THE TILT AT PARTICULAR DEGRRE.
OK!
ITS RANGE IS 0 TO 12 DEGREE.
HOW MUCH TILTS WE GIVE?
ITS DEPEND ON OUR CLUTTER TYPE.
BUT ALWAYS DON’T GIVE IT ZERO DEGREE.IF YOU GIVES THEN THEIR WILL BE CHANCES OF CALL DROP.
ALWAYS GIV IT AT LEAST ONE DEGREE.
IF U CONSIDERING CLUTTER, IF THE SITE IS IN UP (EAST) ,THEN ALWAYS GIV IT 2 OR 3 DEGREE.
IF IT IS IN HP (SHIMLA) I ALWAYS GIVE EITHER 1 OR 4 DEGREE.
BECAUSE IT IS HILLY AREA.OK!
ELECTRICAL TILT?
I SAID MECH. TILT CONCENTRATE ON PARTICULAR AREA OK! THEN WHAT DO ELEC. TILT?
ELECTRICAL TILT IS FOR SIDE LOBES .IT WORKS ON HORIZANTAL AND VERTICAL BEAMWIDTH .IT
COVERS ENTIRE AREA IN
ELEPTICALLY.
ITS RANGE IS 1 TO 10.
NORMALLY THIS IS 1 TO 2. ITS DEPEND ON CLUTTER.
WHAT ARE THE TYPES OF ANTINA?
THERE ARE TWO TYPES OF ANTINA.
CITY ANTINA.
HIGH WAY ANTINA.
WHAT IS BEAMWIDTH?
IT IS ZONE MADE UP FROM RADITION OF ANTEINA FROM HORIZANTAL AND VERTICAL RADITION.
WHAT IS THE BANDWIDTH FOR HIGHWAY AND CITY ANTINA?
FOR HIGH WAY IT IS 33 TO 35 DEGREE
AND FOR CITY IT IS 65 OR 90 DEGREE
FROM WHERE WE ADJUST IT?
WE CANT ADJUST IT . IT IS INTERNAL THING.

WHAT INSTRUMENT WE CARRY DURING DRIVE TEST AND FOR WHAT
PURPOSE?
PC WITH TEMS S/W
TEMS
GPS/DIGITAL GPS (NO BATEERYIN THAT)
DONGLE(IT IS NOTHING BUT THE AUTHENTICATION KEY OF TEMS S/W)
USB CABLE
INVETER
RECIEVER LEVEL?
IT IS NOTHING BUT HOW MUCH AMOUNT OF SIGNAL STRENGTH WE GET.
RECIEVER QUALITY?
THIS IS NOTHING BUT HOW MUCH AMOUNT OF SOUND QUALITY WE GET .
WHAT IS LOGFILE?
THIS IS THE FORM IN WHICH WE GIVE THE REPORT TO OUR COORDINATOR.
THIS IS THE COLLECTION OF RX.LEVEL AND RX.QUAL. WE GET WHILE DRIVE TEST.BY ANALISING THIS
WE CAN SOLVE THE N/W PROBLEM.
WHAT IS THE USE OF MCOM?
IT IS THE S/W LIKE MAP INFO. PROFESSIONAL WITH SITE DATA COLLETION OF EXACT ANTENNA
ORIENTATION, MAP.ETC.BY USING THIS WE CAN SEE WHAT IS THE FREQ.AND BSIC.
AS WELL AS WE CAN SEE WHICH SITE SHOULD BE TAKING ITS HANDOVER OR WE CAN SEE NEIGHBOUR.
FREQ.HIT IS THEIR THEN, WHAT IS THE MOST CHANCES THAT FREQ.COMING FROM WHICH SITE?
WHAT IS BCCH & ARFCN?
BCCH BROADCAST CONTROL CHANEEL AND ABSOLUTE RADIO FREQ. CHANNEL NO.
THE MAIN SECREAT IS THESE ,BOTH ARE SAME, OK!
IN FIG. EVERY ONE SAY FREQ. IS 842,847,844 OR BCCH IS 842,847,844 AND OTHER IN ROUND
BRACKET IS BSIC.
842 DOES NOT NEANS 842 IT WILL BE RANGE OF FREQ .GIVEN IN YOUR BAND .OK!

842 MEANS EX.FOR 900 BAND (GSM FREQ.UPLINK 890 TO 915 DOWNLINMK 935 TO 960 )
UPLINK 899 TO 903 AND
FOR DOWN LINK IT IS 935 TO 940. THESE RANGES ARE FOR EXAMPLE HERE.
THESE RANGES ARE FOR EXAMPLE HERE.
AND FOR EX. 1800 BAND (GSM FREQ.UPLINK 1710 TO 1785 DOWNLINMK 1805 TO 1880 )
UPLINK 1715 TO 1720
DOWN LINK 1808 TO 1880 THESE RANGES ARE FOR EXAMPLE HERE.
WHAT IS BASIC?
FOR MORE DETAIL SEE ABOVE FIG.
IN FIG . EVERY ONE SAY FREQ. IS 842,847,844 OR BCCH IS 842,847,844 AND OTHER IN ROUND
BRACKET IS BSIC.
BASE STATION IDENTITY CODE IS THE CODE WHERE IN THE FIRST DIGIT INDICATES NCC AND SECOND
DIGIT INDICATES BCC.
NCC: NETWORK COLOUR CODE
BCC: BASE STATION COLOUR CODE
THE NCC AND BCC HAVE VALUE RANGING FROM O0 TO 77(OCTAL SYSTEM).
NCC: THE NCC IS FIXED FOR AN OPERATOR, SIGNIFYING AT ANY GIVEN POINT THERE CAN BE MAXIMUM
OF 8 OPERATORS IN AN AREA.
BCC: BCC DEFINES THE CLUSTER NO.WHICH MEANS A GROUP OF 8 CLUSTERS CARRY UNIQE IDENTITY
WHICH ARE USED FOR ANOTHER GROUP OF 8 AND SO ON.
EX. IF BSIC IS 65 THEN 6 IS NCC AND 5 IS BCC
IF BSIC IS 55 AND FREQ.IS 55 THEN HO WOULD NOT TAKE PLACE.
WHAT IS CLUSTER?
GROUP OF FREQ. CAN BE PLACED TOGETHER INTO PATTERNS OF CELLS CALLED CLUSTER.
CLUSTER IS A GROUP OF CELLS IN WHICH ALL AVAILABLE FREQ. HAVE BEEN USED ONCE AND ONLY
ONCE.
THE PRINCIPAL FOR ALLOCATION OF THE BSIC IS THE SAME AS THE RF CARRIER BUT AT
CLUSTER LEVEL RATHER THAN CELL LEVEL.
FREQ. REUSE?
FREQUENCY REUSE IMPLIES THAT IN A GIVEN COVERAGE AREA THERE ARE SEVERAL CELLS THAT USES
THE SAME SET OF FREQ.
THESE CELLS ARE CALLED COCHANNEL CELLS .AND THE INTERFERENCE BETWEEN SIGNALS FROM
THESE CELLS ARE CALLED CO CHANNEL INTEREFERENCE.

WHAT IS TEMS?
TEST EQIPEMENT MOBILE SYSTEM IS A TESTING TOOL USED TO READ AND CONTROL THE INFORMATION
SENT OVER AIR INTERFACES BETWEEN BASE STATION AND THE MOBILE STATION .IT CAN BE USED
FOR RADIO COVERAGE MEASUREMENS.IN ADDITION
TO FIELD MEASUREMENT AND POST PROCESSING.
ALL KIT CONSISTS OF MOBILE STATION WITH SPECIAL SOFTWARE, A PORTABLE PC AND OPTIONALLY A
GLOBAL POSITONING SYSTEM RECIEVER.THE PC IS USED FOR PRESENTATION, CONTROL AND
MEASUREMENT STORAGE.
MS IS USED IN ACTIVE OR IDLE MODE.
WHAT IS THE DIFF. VERSION OF TEMS? AND WHICH INSTRUMENT IS COMPATIBLE
WITH THEM?

TEMS 6.0
TEMS 6.1.3 T 610
TEMS 7.0
TEMS 8.0 (NO NEED OF PORT SETTING.)
WHICH PARAMETER WE NEED TO CHECK IN DRIVE TEST?
1] CURRENT CHANNEL
2] SERVING NEIGHBOUR
3] RADIO PARAMETER
4] C/I
5] C/A
1] CURRENT CHANNEL:
TIME
CELL NAME
CGI (MCC NCC LAC (BSC) CI)
CELL GPRS SUPPORT
BAND 900/1800/1900
BCCH ARFCN
TCH ARFCN
BSIC
MODE
TIMESLOT
CHANNEL TYPE
CHANNEL MODE
SPEECH CODEC
CIPHERING ALGORITHUM
SUB CHANNEL NO.
HOPPING CHANNEL
HOPPING FREQ.
MAIO
HSN
WHEN YOU START LEARNIG JUST GIVE CONCENTRARION ON (CELL NAME,CGI (MCC NCC LAC (BSC)
CI) ,BAND 900/1800/1900,BSIC ,TIMESLOT HOPPING CHANNEL,HOPPING FREQ.,MAIO&HSN).
REMAING POINT CONCENTRATES LATER…..
DETAIL :
CGI: CELL GLOBLE IDENTITY: = MCC+MNC+LAC+CI
MCC MOBILE COUNTRY CODE ITS RANGE IS 000 TO 999 FOR INDIA IT IS 404.
MOBILE NETWORK CODE 000 TO 999 OR SOMETIMES IT IS TWO DIGITS 00 TO 99
LAC LOCATION AREA CODE AND CELL ID BOTH HAVE SAME RANGE 0000 TO FFFF (HEXADESIMAL)
OR 0000 TO 65535
CELL GPRS SUPPORT: IT INDICATES WHETHER GPRS SUPPORTED OR NOT……… YES/NO
BAND: IT INDICATES FREQ BAND OF BCCH CARRIER ONE OF “850” “900” “1800” “1900” “900E”
“900R”
CHANNEL TYPE: ALSO INDICATING WHICH SPEECH CODER IS USED.
FOR EX. “TCH/F” +FACCH/F&SACCH/M” “BCCH”, OR “PDCH”.

Channel mode: Signaling only, speech transmission or data transmission.
Speech codec: currently used speech codec
RANGE “FER, HR, FR, AMR”
CIPHERING ALGORITHUM: CURRENTLY USED CIPHERING (A5/1,A5/2,GEA5/ 1” ETC.)
WHATEVER FOR CKT. SWITCHED OR PACKT SWITCHED..
SUB CHANNEL NO. : RANGE 0 …..TO ….7 .
NO.OF SUBCHANNEL USED IN SDCCH OR TCH HALF RATE CHANNEL.
HOPPING CHANNEL :
HOPPING FREAUENCY:
MAIO: MOBILE ALLOCATION INDEX OFFSET .INDICATES WHERE IN THE HOPPING FREQ.LIST TO START.
VALID ONLY HOPPING FREQ. IS USED.
RANGE 0……..63
HSN: HOPPING SEQ.NO: HOPPIING SEQ. NO. INDICATING WHICH FREQ. LIST TO USE.
RANGE 0 …….63
2] SERVING NEIGHBOUR : BSIC , ARFCN , RX. LEVEL , C1 , C2 , C31 , C32
HERE THE DEFINED NEIGHBOUR WILL APPEAR.
3] RADIO PARAMETER : FULL & SUB
A] RX LEVEL RANGE: -10 TO -120
-10 TO -70 BEST
- 71 TO -80 GOOD
-91 TO -120 BAD
B] RX QUALITY (ITS DEPEND ON INTERFERENCE) : RANGE 0 TO 7
0 TO 3 GOOD
4 TO 5 AVG.
6 TO 7 BAD
C] FER ACTUAL:
D] BER ACTUAL:
E] SQI : RANGE 21 TO 30 OK
ABOUT SQI: IF BSIC AND FREQ ARE SAME THEN SQI GOES NEGATIVE.
4] C/I (WORST /BEST) RANGE 5 TO 25
20 TO 30 GOOD
15 TO 20 AVERAGE
15 TO 10 UNACCPTABLE
5 TO 10 BAD
MS POWER CONTROL LEVEL
DTX
TA
1 TA = 550m
(RECEIVING LEVEL)RL TIME OUT COUNTER (MIN)
RL TIME OUT COUNTER (MAX)
MS BEHEVIOR MODIFIED
5] C/A

SEE LATER (MS POWER CONTROL LEVEL DTX, FER ACTUAL ,BER ACTUAL, RL TIME OUT COUNTER
(MIN),RL TIME OUT COUNTER (MAX),MS BEHEVIOR MODIFIED).
DETAIL:
*FER ACTUAL: IT IS VALID FOR VOICE ONLY.
FER CALCULATED TAKING DTX (DISCONTINEOUS TRANSMISSION) INTO ACCOUNT I. E. THE FIGURE IS
BASED ONLY ON BLOCKS ACTUALLY TRANSMITTED.
RANGE 0 TO 100 %
IT IS CALCULATED BY
% FER ACTUAL= (NO.OF ERASED BLOCKS /TOT.NO.OF BLOCKS)*100
A BLOCK IS ERASED WHEN PARITY CHECK FAILED.
*BER ACTUAL: RANGE 0 …… TO 26 %
BIT ERROR RATE CALCULATED TAKING DTX (DISCONTINEOUS TRANSMISSION) INTO ACCOUNT I.E. THE
FIGURE IS BASED ONLY ON BLOCKS ACTUALLY TRANSMITTED.
IT IS VALID FOR VOICE ONLY.
*SQI: SPEECH QUALITY INDEX. THE RANGE DEPENDS ON THE SPEECH CODEC USED.
RANGE: -20 TO 30.DBQ
HALF RATE: -20 TO 17 DBQ
FULL RATE: -19 TO 22 DBQ
ENHANCED FULL RATE: -20 TO 30 DBQ
C/I WORST (BEST) (0): RNAGE -5 TO 35.
C/I FOR THE WORST CHANNEL IN THE HOPPING LIST FOR EACH USED TIME SLOT.
*MS POWER CONTROL LEVEL: RANGE 0 ….TO 31
PHONE TRANSMIT POWER LEVEL ORDERED BY THE BASE STATION, MAPPED TO A NO.BETWEEN 0 & 31
ACCORDING TO THE TRANSMISSION 3 GPPTS 05 05, CH 4, VLAID ONLY IN DEDICATED MODE.
*DTX: (RATE DL) RANGE 0 TO 100%.
DISCONTINEOUS TRANSMISSION:
CALCULATED AS = (NO.OF BLOCKS SENT /TOT. NO. OF BLOCKS) * 100
TWO MANDETARY BLOCKS ARE ALWAYS SENT USING DTX: 1 TCH AND 1 SACCH.
NON EXISTENT FOR PACKET SWITCHED (NO.DTX).
* TA: TIMING ADVANCE: RANGE 0 …. TO 63
VALID ONLY IN DEDICATED MODE.
TA is used to compensate the time delays of transmission of radio signals from different
mobiles (Delay of data bits).It is transmitted on SACCH and its max.value is 63.It means the
max. Distance from BTS to MS is 35 km allowed by TA.
TA increases as go away from the site.
From TA we l measure the distance of MS from the BTS.
1 TA= .550metres
so if TA = 2 then we r around 1.2 km far from the site.
TA = 1 den Ur in a radius of 550 meters from the site whether it should be 300 mts or 400
mts.
*TIME SLOT: VALID ONLY IN DEDICATED MODE.
RANGE 0 TO 7
TIME SLOT USED FOR CURRENT CALL.
MS BEHAVIOR MODIFIED:
BELOW TEMS 6.1 S/W IS COMPITABLE WITH INSTRUMENTS (MOBILE) T610

WHAT IS THE DIFF.TYPE OF DRIVE TEST?
THERE ARE NOT SPECIFIC TYPES OF DRIVE BUT WE CAN SAY,
1. COMPARE DRIVE
2. MIGRATION DRIVE
3. ZONAL DRIVE
LET US SEE!
1 : COMPARE DRIVE:
IS NOTHING BUT WE ARE CHECKING THE COVERAGE OF OURSELF AS WELLL AS OUR COMPITATER.IT
MEANS WE ARE WORKING FOR AIRTEL OK! WHILE WE ARE DOING DRIVE WE ARE SET HUTCH IN
ANOTHER MS AND DO DRIVE.
SEE IN ABOVE TEMS FIG. FIRST TWO MOBILES ARE CONNECTED, THE SAME WAY WE COMPARE THE
COVERAGE OF BOTH PARTY.

2 : MIGRATION DRIVE:
LET US CONSIDER THERE ARE TWO MSC .IN FIRST MSC THERE ARE 25 SITES AND IN ANOTHER MSC 20
SITES .OK!
AFTER SOME TIME THERE IS SOME PROBLE THEN WE SHIFT 2 SITES FROM FIRST MSC (25) TO SECOND
MSC (20).
AFTER THIS EVENT THERE IS NEED OF MIGRATION DRIVE .IT MEANS WHEN THERE IS SOME CHANGES
IN SITE DISTRIBUTION OF BSC NEED OF ZONAL DRIVE.
WHAT PRECACATION NEED TO TAKE DURING THIS DRIVE?
LISTEN IN ABOVE PROCEDURE THEIR IS CHANGES IN LOCATIOIN SO WE HAVE ALWAYS TAKE
CARE WHILE LOCATION AREA UPDATE AND HANDOVER IS CORRECT OR NOT .AS WELL AS WE
TAKE CARE OF CGI, BSC, HO.
3 : ZONAL DRIVE:
IT IS NOTHING BUT THE YOUR COVERAGE AREA IS DIVIDE INTO ZONE NOTHING ELSE .THIS IS IN
HYDRABAD ONLY.
HOW MANY VERSION TEMS HAVE?
TEMS DATA COLLECTION 6.1.3
TEMS DATA COLLECTION 7.1.1
TEMS DATA COLLECTION 8.O—8.0.4
WHAT IS BENCH MARK KIT?
THIS KIT IS NOTHING BUT JUST WE ARE CONNECTING MORE THEN ONE MS FOR KIT AND NOTHING
ELSE.
WE SEE THIS IS IN COMPARE DRIVE.
WHAT WORK WE HAVE IN BTS?
BTS IS NOT OUR SECTION; WE JUST KNOW THE TRU/TRX, HLT MODE, And SOME ALARM INDICATOR.
WE HAVE WORK IN BTS SOLVE THE PROBLEM OF CABLE SWAP TO SET BOWN THE SITE IN LOCAL MODE
(HALT MODE) !
BEFOR SET THE SITE IN LOCAL MODE WE MUST MAKE CALL MSC AND TELL THEM THAT WE ARE DOING
THIS!
HOW SEND THE SITE IN LOCAL MODE?
THERE IS ONE BUTTON (ALSO THERE IS AN INDICATOR BESIDE BUTTON) ON BTS WHICH WE PUSH BY
ALIGNER SLIGHTLY
AFTER COMPLETE OUR WORK WE MUST PRESS IT AGAIN TO EXIT FROM LOACL MODE.
WHAT ARE ALARMS IN BTS?
THESE ARE THE INDICATOR WHICH IS INIDICATE IN MSC REGARDING TO THEIR SETTING.
EX.IF DOOR OF BTS IS OPEN THEN IN MSC THERE IS ALARM FOR IT KNOWN AS DOOR ALARM.
IN SUCH WAY THERE ARE LOTS OF ALARM, VSWR, ETC.
HOW TO CONFIRM THAT THESE ALARM ARE ACTIVE?

SIMPLY THERE IS INDICATOR IN BTS OR ASK MSC BY DOING CALL IS THEIR ANY TYPE OF ALARM?
WHAT WORK WE HAVE IN MSC?
II THERE IS PROBLM IN HANDOVER TAKING THEN WE HAVE TO CALL IN MSC TO DEFINE NEIGHBOUR.
SIMPLY WE HAVE TO SET SOME PARAMETER OF SITE FROM MSC JUST FOR CONFIRM ALL PARAMETER IS
SET OR NOT WE HAVE TO CALL MSC .EX.NCC PARAMETER
OR CONFIRM ANY ALARM?
OR CONFIRM IS THAT SITE ON AIR OR NOT?
WHAT DOES MEANS ON AIR OR NOT?
IT SIMPLY MEANS SITE IS READY TO LAUNCH OR NOT?
WHAT IS IDLE MODE AND DEDICATED MODE?
SIMPIL IDLE MEANS AIMLESS.WHEN YOUR MOBILE IS NOT HAVING CALL.
DEDICATED: IT MEANS YOUR CALL IS CONTINUE …………………………………..
WHY WE DO DT IN IDLE MODE AND DEDICATED MODE?
FOR COLLECTING THE DATA.
(SECREAT:IN IDLE MODE WE CANT GET THE QUALITY LEVEL)
SOME TIMES WHILE DOING DT THERE IS CHANCE MISS RX.LEVEL, IF THERE IS SHADOW ZONE COMING
IN OUR PATH.SO THAT LEVEL WE COLLECT IN IDLE MODE!
WHAT IS SHADOW ZONE?
SIMPLY IT MEANS THERE IS BIG OBSTCLE BETWEEN OUR SITE GSM AND MS.(OR SIGNAL CANT REACH
COMPLETLI CONTINEOUSLY UPTO U R MS)
WHAT IS SHORT CALL AND LONG CALL?
SHORT CALL: IT IS NOTHING BUT THE CALL CONTINUES FOR ONE OR TWO MINUTES AND THEN
DISCONNEC.
LONG CALL: IT MEANS U R CALL WILL CONTINUE FOR A LONG TOME JUST FOR ONE OR TWO HOUR.
WHY WE DO DRIVE IN SHORT AS WELL AS LONG CALL?
FOR CHECKING THE NETWORK PERFORMANCE.
IN SHORT CALL WE CHECK THAT OUR NETWORK IS SETUP CALL AS WELL AS AGAIN CONNECT THE CALL
IMMEDIATELY AFTER WE DISCOONECT IT OR NOT ?
IN THIS WE CHECK CONNECTIVITY OF OUR NETWORK.
OR
THE PURPOSE OF THIS TEST IS TO DETERMINE IF CALL SET-UPS ARE PERFORMED PROPERLY.
LONG CALL:
BUY USING THIS WE TEST BOTH THE NETWORK COVERAGE AND QUALITY.
IN LONG CALL WE CHECK EITHER OR CALL CONTINEOSLY GOING ON OR DISCONNECTING? MEANS WE
ARE CHECKING CONTINEUTY!
WHAT IS EET?

THE FREQ.PLANNING IS DONE WITH THE ERICSSON ENGINEERING TOOL, EET.
EACH CELL WAS ASSIGINED FREQ. FROM ONE GROUP.THE GROUP WAS CHOSEN SO THAT THE
FREQ.REUSE PATTERN WAS AS CLOSE TO AN X/YY REUSE PATTERENAS POSSIBLE.
CO-CHANNEL AND IN ADJUCENT CHANNEL INTEFEREENCE PREDICTIONS WERE MADE WHEREBY FREQ.
WERE BORROWWED FROM OTHER GROUPS SO THAT THE RISK FOR INTEREFERENCE COULD BE
MINIMISED.
WHAT IS AT?
ACCEPTANCE TEST:
IT IS THE PROCEDURE THATCARRIED OUT AFTER THE INSTALLATION OF A SYSTEM IN ORDER TO ASSES
THAT THE PERFORMANCE OF RADIO NETWORK RELATED ISSUES IS SATISFACTORYILY COMPERED TO THE
COMMITMENTS MADE BY ERICSSON TO CUSTME(HUTCH/AIRTEL/IDEA /BSNL.)
THAT’S ALL FROM NOW! SEE U IN SECOND PART OF HUNK’S TIPS!

Dt notes part 11

More Related Content

Similar to Dt notes part 11 (20)

Recently uploaded (20)

Dt notes part 11