Meaning
Operational states in cellular communication where a user equipment maintains an active signaling link and allocated radio resources with the base station define the network attachment level. In this state, known as RRC connected, the device can transmit and receive payload data on demand. It represents the highest power consumption state due to continuous receiver monitoring and scheduled signaling exchanges.
Resource Allocation
Control channels continuously monitor the connection to manage radio bearer configurations and schedule transmission slots. The network dynamically adjusts the allocated physical channels to match the throughput requirements of the mobile terminal. While the device remains RRC connected, it performs neighbor-cell measurements and reports them to the base station to facilitate handovers.
This continuous activity ensures reliable, high-speed data transfer across the network.
Transition Control
Inactivity timers run in the base station to release resources when data transfer ceases. If no packets are exchanged before the timer expires, the device transitions from RRC connected to a lower power state. This mechanism frees up scarce radio resources for other active devices on the cell.
Power Measurement
Energy profiling must measure the current draw during active states. Measuring the current when the device is RRC connected helps engineers estimate the battery consumption under continuous transmission scenarios.
