Sidelink Relay DRX Timing for Control Signals
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing discontinuous reception (DRX) during sidelink communications, particularly in beam-based scenarios, leading to inefficient power consumption and suboptimal communication performance.
Innovation Solution
Implementing a discontinuous reception (DRX) mode that alternates between inactive and active time periods for monitoring control signals from a base station and sidelink control signals from another UE, allowing for dynamic adjustment of communication periods and enabling the transmission of messages to optimize power usage and communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors both control signals from base station and sidelink control signals continuously, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent segments the reception monitoring function into distinct time periods: first active time periods for monitoring base station control signals and second active time periods for monitoring sidelink control signals. This temporal segmentation allows the UE to monitor both signal types reliably while limiting power consumption by restricting monitoring to specific intervals rather than continuous operation.
Solution Approach 2:
The patent implements periodic DRX cycles with alternating inactive and active time periods. During inactive periods, the UE enters low-power state; during active periods, the UE wakes up to monitor control signals. This periodic action pattern enables the UE to maintain communication reliability through regular monitoring while significantly reducing average power consumption compared to continuous monitoring.
2Use of energy by moving object
If the UE enters DRX inactive mode to save power, then power consumption is reduced, but the ability to receive control signals timely deteriorates
Solution Approach 1:
The patent applies preliminary action by having the UE transmit indication information to the base station before the actual signal reception period. The UE indicates upcoming second active time periods when it needs to monitor sidelink control signals. This advance notification allows the base station to prepare appropriate scheduling and ensures the UE wakes up at the correct time to receive signals without unnecessary delays, balancing power saving with timely reception.
Solution Approach 2:
The patent implements feedback mechanisms where the UE sends indication information about its intended active periods to the base station. The base station uses this feedback to adjust downlink assignments and ensure control signals are transmitted during appropriate time windows. This feedback loop ensures that when the UE wakes up during active periods, the necessary control signals are already prepared and available for timely reception.
3Productivity
If the UE dynamically adjusts active time periods for different signal types, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamics by allowing the UE to flexibly adjust DRX active time periods based on actual communication needs. The UE can modify the timing and duration of first and second active periods to optimize monitoring of different signal types. This dynamic adjustment capability improves communication efficiency by aligning monitoring periods with actual data transmission patterns while managing complexity through standardized DRX protocols.
Solution Approach 2:
The patent applies parameter changes by modifying DRX configuration parameters such as active time duration, inactive time duration, and adjustment parameters based on communication conditions. The UE and base station can adjust these parameters dynamically to optimize the balance between power consumption and communication efficiency. This parameter-based approach manages system complexity by using configurable values rather than complex adaptive algorithms.
4Use of energy by moving object
If the UE transmits indication information about active periods, then power management is improved, but overhead signaling increases
Solution Approach 1:
The patent applies the extraction principle by separating the indication information transmission from the main data communication. The UE transmits compact indication information about upcoming active periods using dedicated signaling mechanisms, extracting only the essential timing parameters needed for power management. This extraction approach improves power management effectiveness while minimizing the quantity of signaling overhead by transmitting only necessary control information rather than complete communication state data.
Data Source
AI summary
A wireless communication device can activate a discontinuous reception (DRX) mode having first inactive and active time periods allowing a user equipment (UE) to communicate sidelink control signals to another UE. The UE may receive a message from the another UE indicating an upcoming second active time period and second active time period duration for transmitting the sidelink control signals. The UE may transmit the sidelink control signals to the another UE during the second active time period duration after receiving the message from the another UE. Other aspects, features, and embodiments are also claimed and described.