- What is link Budget Analysis used for in GSM?
- Answer: Link budget analysis is used for the path balance between both up-links (Transmitter)Down-link(Receiver) part of the network. Imbalance in up-link and down-link causes a frequent call drop and decreases the Call Complete Success Rate (CCSR).
- 2. How is path loss taken into calculation ?
- This is the total path loss occurred due to multipath propagation of the signal between transmitted signal and the received signal level.
Few important reasons for path loss:
- Reflection
- Deflation
- Scattering
- Rain fading etc.
- Answer:
- This is process of increasing traffic by adding Transceivers (TRXs) traffic channels and proper use of frequency reuse pattern. By adding new BTSs.
- 4. How is site selection done for planning and site acquisition?
- Answer:
- After nominal cell planning with the geographical coordinates identifying best site candidate in a geographical area is the process of site selection. Selecting best sites depends on number of issues:
- Site distance from nominal.
- Site availability.
- Major obstacle.
- Type of site Rooftop (RT), Greenfield (GF), Greenfield rooftop (GFRT), here rooftop will be top prioritized.
- 24/7, 365 site access permits or not.
- Site distance from car access able road.
- Lift avail ability in rooftop (RF) sites etc.
5. What is optimization? What are the tools used for optimization?
Answer:
- Once GSM network is integrated in order to achieve proper planning predictionRF parameters Optimization is done.Drive test tool, Planning tool and Post processing tools are used for optimization.Drive Test Tools:
- Tems investigation data collector.
- Tems route analyzer.
- Nemo
- Actrix
- Cell planner
- Mapinfo
- Google map.
6. What is system information? - Answer: System information is from BTS sent to Mobile for the idle mode and dedicated mode of the call for call management.
- 7. What is bench marking in GSM ?
- Answer: Bench Marking used for comparing performance of different network for quality and call performance parameters.
- 8. What is Erlang table?
- Answer: This is the table for calculating Traffic in erlang for number of channels. To calculate Erlang we often consider blocking probability is a constant value, but in practice it’s not, It varies on Traffic and other KPI issues.
- 9. How do you optimize a network using OMCR performance data?
- Answer: Proper increase in call success, and increase in handover success performance and drop call reduction performance, error log analysis etc.
- 10. What is daily report and traffic?
- Answer: This is the report obtained in OMC for the performance of all BTS about traffic and resource utilization.
- For More question: VIVA Question
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