Sidelink Monitoring Configuration for PSFCH Scheduling Reliability
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Solution Overview
Problem
The direct reuse of Uu Discontinuous Reception (DRX) in sidelink communication leads to packet loss, low reliability, and incorrect scheduling due to the inability to monitor Physical Sidelink Feedback Channels (PSFCH) outside the active time, resulting in inconsistent understanding of feedback content and resources among terminals and the base station.
Innovation Solution
A transmission or reception configuration method that indicates specific time domain ranges for terminals to monitor or not monitor target objects, such as SCI, PSCCH, PSSCH, and PSFCH, thereby controlling transmission behaviors to avoid packet loss and ensure accurate scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If Uu DRX is directly reused in sidelink communication, then energy saving is achieved by monitoring only during active time, but packet loss occurs and reliability decreases because PSFCH resources outside active time cannot be monitored
Solution Approach 1:
The patent applies dynamics by making the monitoring behavior adaptive rather than static. Terminals dynamically adjust their monitoring behavior based on whether resources fall within or outside active time. The network device dynamically configures different monitoring requirements for different time domains, allowing the system to balance energy saving during inactive periods with reliable reception during active periods.
Solution Approach 2:
The patent segments the time domain into active time and inactive time, and further segments resource monitoring requirements accordingly. Different monitoring rules are applied to different segments: during active time, terminals monitor all resources including PSFCH; during inactive time, terminals may skip monitoring certain resources to save energy. This segmentation allows the system to achieve energy saving while maintaining reliability for time-critical communications.
2Loss of time
If Uu DRX is directly reused in sidelink communication, then monitoring duration is reduced to only active time, but scheduling accuracy decreases and incorrect scheduling occurs due to inconsistent understanding of feedback content among terminals and base station
Solution Approach 1:
The patent implements feedback mechanisms where the network device provides configuration information to terminals about which resources to monitor during inactive time. This feedback ensures that all terminals have consistent understanding of which PSFCH resources to monitor, eliminating the inconsistent scheduling understanding problem. The network device feedbacks the active time configuration and monitoring requirements to ensure synchronized behavior across all terminals.
3Productivity
If resources are reserved for subsequent transmission within a period of time, then resource utilization improves, but packet loss increases when PSFCH corresponding to these resources falls outside active time and cannot be monitored
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure monitoring requirements for resources that may fall outside active time. Before terminals enter inactive time, they receive configuration information about which PSFCH resources to monitor even if those resources fall in the inactive period. This preliminary configuration ensures that terminals are prepared to monitor critical feedback resources, preventing packet loss while maintaining efficient resource utilization.
Data Source
AI summary
A transmission or reception configuration method and a terminal are provided. The transmission or reception configuration method is performed by a terminal and includes: obtaining a transmission or reception configuration, where the transmission or reception configuration is used to indicate a first time domain range in which the terminal does not monitor a target object or a second time domain range in which the terminal monitors a target object.