Worked closely with firmware software team, customers and wireless carriers (AT&T and Verizon and Sprint) during end-to-end system design/test/production launch, protocol development and improvement for GPS/GPRS/UMTS/CDMA/Bluetooth aided mobile devices/fleet management system. Support for wireless network connectivity/authentication/routing activities for GSM/GPRS/UMTS/CDMA, System configuration, optimization and performance/coverage analysis and testing. Tools development and support on Linux system/PC, managing/analyzing massive over-the-air wireless data and storage on Linux using Postgres DB.
• Test lead for Qualcomm’s mobile trailer tracking communication system integrated with GPS, motion sensor / door sensor / cargo sensor, tire pressure and fuel sensor two-way report system.
• System tested mobile trailer tracking data calls (TCP/UDP/IP) over CDMA/UMTS/GPRS/GMS network, tasks including, preparing/writing/running test cases for AT commands set validation of Telit phone module GE-386-GPS and Sierra wireless SL 808x and certification.
• Certificate tested for SMS through AT&T network. System tested for end-to-end SMS ping among NMC/QESME, SMSC of AT&T and Qualcomm wireless devices.
• Power consumption test and battery charging performance analysis for mobile device powered from solar panel and other external powers.