Sidelink Destination Address Selection Using DRX State
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Solution Overview
Problem
Current sidelink communication methods do not effectively consider the discontinuous reception (DRX) state of destination terminals, leading to data loss and delay by transmitting data outside the wakeup window or using non-priority logical channels.
Innovation Solution
A method for selecting a destination address in sidelink communication that takes into account the DRX parameters and states of logical channels, prioritizing data transmission within the wakeup window and using logical channel priorities to avoid data loss and delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted without considering DRX state, then transmission simplicity is maintained, but data loss and delay occur
Solution Approach 1:
The terminal pre-determines the DRX parameters and DRX state of the destination address before transmitting data. By checking whether the destination terminal is in the wakeup window in advance, the system avoids data loss and delay without requiring complex real-time coordination during transmission.
Solution Approach 2:
The system uses feedback from the DRX state information to dynamically adjust the destination address selection. The terminal receives DRX configuration information and uses this feedback to determine the appropriate destination address based on the current DRX state, ensuring reliable transmission while maintaining manageable complexity.
2Reliability
If logical channel prioritization is not considered, then channel selection is simplified, but data loss and delay increase
Solution Approach 1:
The terminal determines the DRX state and logical channel priority before selecting the destination address. This preliminary assessment ensures that data is transmitted through the most appropriate channel during the destination's wakeup window, preventing data loss while maintaining a clear selection process.
Solution Approach 2:
The system changes the selection parameters by incorporating both DRX state and logical channel priority into the destination address selection process. This multi-parameter approach improves reliability by considering both the receiver's wake schedule and the data's priority level, without creating excessive complexity through systematic evaluation criteria.
3Productivity
If data is transmitted outside wakeup window, then transmission timing flexibility is improved, but data loss occurs
Solution Approach 1:
The terminal checks the DRX state and determines whether the destination is in the wakeup window before transmitting data. This preliminary check ensures that transmission only occurs when the destination is actively listening, preventing data loss while maintaining efficient use of the wakeup window period.
Solution Approach 2:
The system dynamically adjusts transmission timing based on the destination's DRX state. Rather than using fixed transmission schedules, the terminal adapts its transmission timing to match the destination's wakeup windows, ensuring reliable delivery while maximizing productivity within the constraints of the DRX cycle.
Data Source
AI summary
A method for selecting a destination address in a sidelink includes: determining, by a terminal, a discontinuous reception (DRX) parameter and a DRX state of a destination address corresponding to a logical channel on which there is data to be transmitted; and selecting, on the basis of the DRX parameter, the DRX state and a logical channel priority of the logical channel, a destination address configured to transmit the data to be transmitted.