PSFCH Power Selection Across Sidelink Resource Pools
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sidelink power control methods for PSFCHs in multiple resource pools exceed the maximum transmission power of user equipment, leading to inefficiencies and potential power limitations.
Innovation Solution
A method for determining N target PSFCHs and their transmission powers based on maximum transmission power limits, ensuring simultaneous PSFCH transmissions across multiple resource pools do not exceed the UE's maximum power, by prioritizing PSFCHs based on priority, path loss, and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power control is performed for PSFCHs in multiple resource pools, then the total power of simultaneous PSFCH transmissions can be controlled to not exceed maximum transmission power, but the power control complexity increases
Solution Approach 1:
The patent segments PSFCH power control into two distinct levels: (1) intra-resource pool power control that ensures total power of PSFCHs within one resource pool does not exceed the maximum transmission power of the resource pool, and (2) inter-resource pool power control that ensures total power of PSFCHs across multiple resource pools does not exceed the maximum transmission power of the terminal device. This segmentation resolves the contradiction by making the complex multi-resource pool power control problem manageable through hierarchical decomposition.
2Reliability
If PSFCH transmission power is increased to ensure reliable feedback, then the maximum transmission power limit of the terminal device may be exceeded
Solution Approach 1:
The patent implements dynamic power adjustment mechanisms where the terminal device calculates required transmission power for each PSFCH based on channel conditions, feedback requirements, and power constraints. The system dynamically determines whether to transmit all PSFCHs, reduce the number of PSFCHs, or adjust transmission power levels by comparing required power against available power headroom, ensuring reliable feedback transmission while respecting maximum power limits.
3Adaptability or versatility
If the number of simultaneous PSFCH transmissions is increased to improve feedback coverage, then the total transmission power may exceed the maximum power limit
Solution Approach 1:
The patent changes key parameters including the number of simultaneous PSFCH transmissions and their transmission power levels based on channel conditions and power constraints. The system adjusts these parameters dynamically by evaluating channel quality indicators, feedback importance, and available power headroom, allowing flexible adaptation between transmitting more PSFCHs at lower power or fewer PSFCHs at higher power to maintain feedback coverage within power limits.
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
The present application discloses a sidelink transmission method and apparatus, and a terminal device, and relates to the technical field of communications. The sidelink transmission method of the embodiment of the present application comprises: according to a first transmission power, a terminal device determining, from within a first set, a second transmission power of an N number of target physical sidelink feedback channels (PSFCH) and/or of a target PSFCH, where N is greater than or equal to 0; according to the second transmission power of the N target PSFCHs and/or of the target PSFCH, the terminal device performing sidelink transmission; wherein the first set comprises at least two PSFCHs predetermined by the terminal device to take part in sidelink transmission; the at least two PSFCHs being located on at least two first objects; the first objects being used for bearing the PSFCH resources of the terminal device; and the first transmission power comprising at least one of the following: the maximum transmission power of the terminal device; and the maximum transmission power of the terminal device on the first object.