Category Archives: telecommunications

Android Alarms – draining battery even when phone is idle?

Mobile devices are nowadays our mobile personal computers, where we play games, read emails, access social networks and might even do some light productivity tasks. The mobility paradigm required many changes for developers that have now to be more aware of the connectivity differences (cable, wifi, 3/4G..), execution patterns and respective impacts on the limited… Read More »

Radio Resource Control for Dummies

In order to comprehend the Radio Resource Control (RRC) state machine, we should study the architecture of the third generation mobile cellular system, the Universal Mobile Telecommunications System (UMTS). The UMTS is composed by two subsystems, the UTRAN (Umts Terrestrial Radio Access Network) and CN (core network) : We are more interested in the UTRAN… Read More »