DRX-Aware Transmission Resource Selection for Direct Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, especially in direct communication links, the sending-end UE cannot select resources based on the DRX setting of the receiving-end UE, leading to potential data loss as the receiving-end UE may miss direct transmissions due to being in a sleep state during the transmission.
Innovation Solution
The method involves determining a time-frequency transmission resource for direct transmission based on the DRX setting of the receiving-end UE, ensuring that the transmission occurs within the activated state of the receiving-end UE, by obtaining or sending the DRX setting through network devices or target UEs, and using control information to synchronize the transmission resource selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sending-end UE transmits data without considering the DRX setting of the receiving-end UE, then the transmission can occur at any time-frequency resource, but the receiving-end UE may miss the transmission when in sleep state, leading to data loss
Solution Approach 1:
The sending-end UE obtains the DRX setting of the receiving-end UE in advance and uses this information to pre-determine appropriate time-frequency transmission resources. By performing this preparation beforehand, the system ensures that transmissions are scheduled during the receiving-end UE's activated states, preventing data loss while maintaining efficient resource selection
Solution Approach 2:
The DRX setting information is fed back from the receiving-end UE to the sending-end UE (either directly or through network devices), enabling the sending-end UE to adapt its transmission resource selection. This feedback mechanism allows the system to dynamically adjust transmissions according to the receiving-end UE's sleep and wake patterns, ensuring reliable communication
2Reliability
If the sending-end UE aligns transmission resources with the receiving-end UE's DRX activated state, then data loss is prevented, but the resource selection process becomes more complex
Solution Approach 1:
The receiving-end UE autonomously determines its own DRX settings and provides this information to the sending-end UE. The sending-end UE then independently uses this information to select appropriate transmission resources without requiring complex coordination or control from network devices. This self-service approach simplifies the overall operation while ensuring reliable transmission
Data Source
AI summary
A method for selecting a transmission resource, includes: determining a time-frequency transmission resource used for direct transmission sent to a receiving-end user equipment based on a discontinuous reception DRX setting of the receiving-end user equipment. Determining the time-frequency transmission resource may include excluding, from a set of candidate time-frequency resources. Further, according to the DRX setting, time-frequency transmission resources used for first K repetitions of M repetitions of the data transmission are within a time range indicated by the DRX setting.