DRX Control Signal for Sidelink Resource Sensing
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Solution Overview
Problem
In sidelink communication, the limited resources available during the active time of a discontinuous reception (DRX) cycle can hinder data transmission and reception, as the transmitting terminal may not have sufficient resources to perform communication with the receiving terminal.
Innovation Solution
A method where a first user equipment (UE) generates and transmits a DRX control signal to a second UE, allowing for the extension of the active time or change in the DRX cycle, enabling resource sensing and selection operations in an extended period, thereby facilitating efficient sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the transmitting terminal performs resource sensing and selection only during the DRX active time, then power consumption is reduced, but sufficient resources are not available for sidelink communication
Solution Approach 1:
The transmitting terminal performs resource sensing and selection operations in advance, before the DRX active time begins. This preliminary action allows the terminal to identify and reserve sufficient resources for sidelink communication while still benefiting from DRX power savings during the main active time period.
Solution Approach 2:
The patent introduces dynamic adjustment of the DRX active time duration based on resource availability requirements. The active time can be extended or adjusted to accommodate resource sensing and selection operations, creating a flexible system that adapts to both power efficiency and resource availability needs.
2Quantity of substance
If the DRX active time is extended to allow sufficient resource sensing and selection, then resource availability improves, but power consumption increases
Solution Approach 1:
Resource sensing and selection are performed in advance during a preliminary sensing window that occurs before the main DRX active time. This allows the system to secure sufficient resources without extending the main active time, thereby maintaining power efficiency while ensuring resource availability.
Solution Approach 2:
The DRX cycle is segmented into distinct functional windows: a preliminary resource sensing window, a resource selection window, and the main active time for data transmission. This segmentation allows each operation to occur in its optimal time slot, preventing unnecessary extension of the overall active time and reducing power consumption.
3Use of energy by moving object
If resource sensing and selection operations are performed within the limited active time, then power consumption is minimized, but sidelink communication cannot be established
Solution Approach 1:
The system performs preliminary resource sensing and selection operations before the DRX active time begins, ensuring that sufficient resources are identified and reserved in advance. This preliminary action guarantees that sidelink communication can be reliably established during the active time without requiring extension of the active period, thus maintaining both low power consumption and high communication reliability.
Solution Approach 2:
The patent implements dynamic adjustment of the DRX active time duration based on the outcomes of resource sensing and selection operations. If sufficient resources are found through preliminary operations, the active time remains short for power efficiency. If additional time is needed, the active time is dynamically extended only to the necessary extent, balancing power consumption with communication reliability.
Data Source
AI summary
Disclosed are a method and apparatus for DRX-based sidelink communication. The method for first UE comprises the steps of: generating a DRX control signal for controlling a DRX operation; and transmitting the DRX control signal to second UE at an active time of the second UE according to the DRX operation.