One of the important tasks to optimize the wireless network is the drive test (DT) to collect data, perform analysis and make optimal adjustment recommendations to constantly improve the network quality.

1. Drive test

• Prepare DT tools: measurement software (Tems investigaion, Nemo outdoor, Swissqual), Laptop, GPS, DC-AC inverter, mobile, SIM card, data card, external antenna, Scanner ...
• Prepare DB: cellfile, digital map, route, cluster...
• Prepare test case (Script): download, upload, longcall, shortcall, MOS, scanner, ping ...

2. Analysis: analysis is the most important part of the network optimization to identify existing problems and propose the solutions to solve the network problems:

• Analysis software: Tems discovery, Actix, Nemo analyze, Google earth, Map info ...
• Analysis DB: cellfile, main KPI data of cell taken from OSS (down/up throughput, CDR, CSSR, HO, congestion), customer complaint data taken from CS ...
• Import logfile, use analysis software to identify abnormal issues such as overlapping, overshooting and abnormal coverage, poor coverage, cross cell, poor signal quality, low download / upload throughput, low MOS , call dropped , call setup failure, HO failure ...
• Make recommendations and report the optimal adjustment: adjust the coverage area of ​​the station such as adjusting the azimuth, tilt, height of the antenna, adding and removing cells, site, degrade or upgrade configuration, frequency planning, optimize neightbor, adjust parameters, algorithm HO ...