Thursday, March 17, 2011

GSM: Drive Test Methodology: Tems Investigation *.*.* Data Collection

Architecture for drive test tools and Methodology platform
MS1: Idle mode
MS2: Long call
MS3: Short call 
 Test SIM cards (3)
Called party number (***….)
DC to AC converter
GSM Scanner (If required)
Post Processing Tool (If required)

You may use dB gain antenna to meet requirement of client at your own (.….)

Test Case Description

Drive defined route/area and make sure no data loss and always avoid overlap.

Network Integration Test:
• Call set up test
Timeslot test, forced call test

GPRS Performance Test:
• Application Performance Test
• WWW, FTP, WAP etc.
Mobility Test
• Cell Reselection, RA Update

Manipulation you can make based on your skill:
- Forced handover
- Lock on to Frequency
- Layer 3 messages Analysis on-spot

You can discard event mismatch by exporting, re-recording of Logfile.

To read more about Drive Test and Mapping of Log file please visit at:  
Note: do not forget to follow this bible: 
Start Record Log-file –> Start Command Sequence –> Stop Command Sequence –> Stop Record Log-file
Please feel free to give comment and ask for relevant help (query).
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Saturday, March 5, 2011

Five villages (300 acre from Kushtia) falsified by BSF

Bangladesh losing five villages (Mohammadpur, Chaidova, Dangerpara, Insapnagor and Purbokharjatak) from its country map. BSF does not allow local citizen to enter their land. Aksed ali, local farmer says; they are tensed because BSF entered Bangladesh territory and took our farming tools.

The BSF has interest in working to falsify maps to create complicated conspiracy, seize our farmers land and mobilize Indian farmers on to the falsely occupied land and start cultivating our land, Indian hegemonic attitudes: they are not only killing our people, but using the fertile land to benefit the Bharti farmers.
The people who live in enclaves do not see the borders. They speak the same language, eat the same food and live life without regard to the politicians in Dhaka and Delhi. But their grievance is lack of public services: with no education, infrastructure for water, electricity etc, they are as well not be citizens of India.

 Our government does not look into their living style because those citizens are barred to cast their vote against rolling Political party.

How to solve this dispute?.

References: Jahurul, I. (2011, March 01).Shimanter Pach Gram ki Bangladesher Manchitro Teke Harie Zabe.Bangladesh Protidin , p.9.
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Tuesday, March 1, 2011


1.Define GSM, C/I , SQI, RxQual, RxLevel, BER,BSIC, AMR, C1 & C2, CEFR, CSSR, RSSI,FER, IMSI attached procedure, MOC & MTC, GGSN & SGSN, BSS, NSS, HLR & VLR, E1 & T1, EIR & AuC, BSC, BTS/RBS, GPRS and EDGE, BCCH, LAC and Cell File etc.
2. How does RxQual relate to BER?
3. What is the frequency ranges of GSM 900 and DCS 1800?
4. Why the uplink frequencies are smaller than downlink?
5. What are the characteristics of Radio frequencies?
6. What are the logical channels used between MS and BTS?
7. What is SDCCH doing during the call establishment?
8. What is Co-Channel interference?
9. What is interference?
10. What is the difference between BER-Full and BER-Sub?
11. Why do we prefer SQI over RxQual?
12. What can be the reasons of a Call drop?
13. What are counters? Why do we need them?
14. What is cell-reselection?
15. Why do we make “short calls” and “long calls” during drive test?
16. Explain call setup, MS registered and Handover (Ho) procedures!
17. What makes GPRS technology different from traditional GSM?
18. How many channels used in GSM .Explain each?
19. Define Timing Advance? Handover failures other than Co-Bcch and Neighbor, difference of RX full and Sub, Multiple coverage and Call muting.
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