System and method for mobile network tuning field measurement

A system for measuring the performance of a mobile network, comprising:

• a field measurement device with a global positioning system, comprising:
• a control unit having a first transceiver that is capable of obtaining a command script;
• and
• a scan unit having a second transceiver, the scan unit being coupled to the control unit and using the second transceiver to continuously scan an assigned frequency of the mobile network, and collect measurement data by executing the command script so that the measurement data with geographic location is recorded in a log file, and transmits the log file to the control unit;
• a server capable of remotely controlling the field measurement device by sending the command script via the mobile network to the field measurement device for execution and in response receiving the log file from the control unit of the field measurement device via the mobile network, the log file is imported into an application software to provide analysis and tuning of the mobile network;
• and
• a built-in command set listing a plurality of command options to operate the field measurement device and selected from a group consisting of a duration or repetition of mobile origination voice call, duration or repetition of mobile termination voice call, duration or repetition of mobile origination 64 Kbps circuit-switched call, duration or repetition of mobile termination 64 kbps circuit-switched call, upload or download packet-switched call, file size of packet-switched call, repetition of packet-switched call, test call, predefined trouble call, unit management, unit status update, idle mode logging start, idle mode logging stop, send back log file, delete log file, pause, mobile network service domain and scan state;
• wherein the predefined trouble call contains the situations of call access failure, call discontinuance, handover failure, LA/RA (Location Area/Routing Area) update failure and a low quality event, and the low quality event is detected by referring to received signal strength indicator (RSSI), ratio of energy per chip and received power density (Ec/Io), block error rate (BLER), channel quality index (CQI) or carrier to interference-plus-noise ratio (CINR), and indicators for the low quality event is detected by referring to received signal strength indicator (RSSI), ratio of energy per chip and received power density (Ec/Io), block error rate (BLER), channel quality index (CQI) or carrier to interference-plus-noise ratio (CINR), and one test sample for any indicator is an average value in a certain user-defined period and the low quality event will be triggered if the test sample count or ratio reaches a user-defined threshold of any indicator in a judgment window which is a definite user-defined duration to decide whether the event happens or not.