DRX Active Time Determination for Sidelink Periodic Transmission
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Solution Overview
Problem
The existing DRX mechanism does not effectively cover cases of sidelink-based periodic transmission, leading to inefficiencies in discontinuous reception and resource management in communication systems.
Innovation Solution
A method and apparatus for determining an active time for the DRX active state in sidelink communication, where a sender UE sends first indication information and active configuration information to a receiver UE, allowing the receiver to determine the active time for receiving periodic transmissions based on the reserved transmission resource and configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the existing DRX mechanism is used for sidelink periodic transmission, then power saving can be achieved through discontinuous reception, but the resource management efficiency deteriorates due to lack of alignment between receiver active state and sender transmission schedule
Solution Approach 1:
The sender UE feeds back transmission resource reservation information (period, offset, duration) to the receiver UE through indication information. This feedback mechanism enables the receiver to determine its active time based on the sender's transmission schedule, achieving alignment between receiver active state and sender transmission without continuous monitoring, thus improving both power saving and resource management efficiency
Solution Approach 2:
The receiver UE preliminarily determines its active time before the actual transmission occurs by using the indication information from the sender. This preliminary action allows the receiver to enter the active state only when needed for receiving periodic transmissions, avoiding unnecessary wake-ups and improving both energy efficiency and resource utilization
2Reliability
If the receiver UE continuously monitors for periodic transmissions, then no data loss occurs, but power consumption increases due to inability to enter DRX sleep state
Solution Approach 1:
The receiver UE dynamically adjusts its active state duration based on the indication information received from the sender. The active time is determined by combining the reserved period, offset, and duration parameters, allowing the receiver to be active only during the necessary window for receiving transmissions and sleep during other periods, thus maintaining reliability while reducing power consumption
Solution Approach 2:
The DRX mechanism implements periodic active and sleep states for the receiver UE. By using the sender's transmission schedule (period, offset, duration) to determine when to be active, the receiver performs periodic monitoring only when transmissions are expected, ensuring no data loss while enabling power saving during idle periods
3Reliability
If the receiver UE enters DRX active state frequently to catch periodic transmissions, then data reception is ensured, but resource management efficiency deteriorates due to misalignment with sender schedule
Solution Approach 1:
The sender UE provides feedback about its transmission schedule through indication information containing reserved period, offset, and duration. This feedback enables the receiver to precisely align its active state with the sender's transmission timing, ensuring data reception while optimizing resource management by avoiding unnecessary active states
Solution Approach 2:
The receiver UE preliminarily calculates and determines its active time based on the indication information before transmissions occur. This preliminary determination of active state timing ensures the receiver is ready to receive data when needed while maintaining efficient resource management through precise alignment with the sender's schedule
Data Source
AI summary
The present application relates to the technical field of communications, and provides an activation time determination method and apparatus, devices and a storage medium. The method comprises: a first device sends first indication information to a second device, the first indication information being used to indicate that the first device is a transmission resource reservation period reserved for periodic transmission; and the second device determines the activation time of a DRX activation state for the periodic transmission on the basis of activation configuration information and the first indication information, the activation configuration information being used to indicate the activation duration of the DRX activation state for the periodic transmission.