UE cDRX Mode Switching for Low-Latency Power Saving
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing latency and power consumption due to varying arrival times of data at the modem, which impact user experience.
Innovation Solution
A method and apparatus for user equipment (UE) to switch between low-latency and low-power modes based on predefined conditions, including cDRX cycle, RSRP and SNR thresholds, and successful data transmission to base station, to optimize power consumption without significantly affecting latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data transmission timing is controlled to arrive at the modem at specific times, then latency can be reduced, but power consumption increases
Solution Approach 1:
The system dynamically switches between two data transmission timing modes (low-latency mode and low-power mode) based on real-time conditions. The modem determines which mode to use by evaluating whether data should arrive at the beginning of a cDRX-on cycle (low-power mode) or at a time optimized for latency (low-latency mode). This dynamic adaptation allows the system to optimize the trade-off between latency and power consumption according to current network and device state.
2Adaptability or versatility
If the UE continuously monitors network conditions and evaluates switching conditions, then mode optimization is achieved, but device complexity increases
Solution Approach 1:
The modem autonomously evaluates switching conditions and determines when to switch between low-latency mode and low-power mode without requiring external intervention. The evaluation is based on predefined conditions including cDRX cycle configuration, reference signal received power (RSRP), signal-to-noise ratio (SNR), and transmission status. This self-service approach simplifies the overall system architecture by embedding the decision-making logic within the modem itself rather than requiring complex external control mechanisms.
Data Source
AI summary
User equipment (UE) is provided. The UE comprises a processing circuit and a modem. The processing circuit is configured to execute an application. The processing circuit is further configured to determine whether a first condition, a second condition, and a third condition are satisfied; and control the UE to switch to a low-power mode, in response to a determination that the first condition, the second condition, and the third condition are satisfied. The application transmits data to the modem of the UE at the beginning of a connected mode discontinuous reception (cDRX)-on cycle in the low-power mode. The modem is configured to transmit the data transmitted from the application to the modem to a base station on the PUSCH.