PSFCH Power Allocation for OCB-Compliant Sidelink Feedback
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Solution Overview
Problem
The challenge of meeting Occupied Channel Bandwidth (OCB) requirements for Physical Sidelink Feedback Channels (PSFCH) in unlicensed bands, particularly in scenarios involving multiple channels or resource blocks, is not adequately addressed by existing power control methods, leading to inefficiencies in PSFCH capacity and resource utilization.
Innovation Solution
A method and device for determining the number and transmission power of PSFCHs, along with corresponding common resource blocks, using rational numbers to ensure that the total power does not exceed the UE's maximum capacity, while prioritizing PSFCHs based on priority orders and power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PSFCH transmission bandwidth is increased to meet OCB requirements, then OCB compliance is improved, but power consumption increases
Solution Approach 1:
The patent segments frequency resources into common RB resources and feedback information resources. Common RB resources are shared by multiple UEs to collectively meet OCB requirements, while feedback information resources are allocated individually. This segmentation allows the system to meet OCB requirements through shared resources rather than each UE independently increasing bandwidth, thereby reducing individual power consumption while maintaining compliance.
Solution Approach 2:
The patent applies partial action by having only the necessary common RB resources activated to meet the 80% OCB threshold, rather than all PSFCH resources being expanded. The common RB resources are selectively used only when needed to satisfy regulatory requirements, avoiding excessive power consumption while ensuring compliance.
2Productivity
If common RB resources are shared by multiple UEs, then resource utilization efficiency is improved, but power control complexity increases
Solution Approach 1:
The patent separates power control into two independent parts: common RB power control and feedback information resource power control. This segmentation simplifies the overall power control complexity by treating shared resources and individual resources differently, while still achieving efficient resource utilization through the common RB mechanism.
Solution Approach 2:
The patent implements dynamic power control for common RB resources based on the number of active UEs and transmission conditions. The power allocation for common RBs is adjusted dynamically to match actual network conditions, ensuring efficient resource utilization while adapting to changing scenarios, thereby managing complexity through adaptability rather than static rigid control.
3Productivity
If PSFCH capacity is increased by using more frequency resources, then transmission capacity is improved, but overhead increases
Solution Approach 1:
The patent merges the functions of common RB resources and feedback information resources into a unified PSFCH transmission framework. By combining these two resource types, the system achieves increased PSFCH capacity through efficient resource allocation, while the overhead is controlled because common RB resources are shared rather than duplicated for each UE, thus improving capacity without proportional overhead increase.
Data Source
AI summary
An information determination method comprises determining the number N2 of PSFCHs and the transmit power of the PSFCHs simultaneously sent by a terminal device UE in one PSFCH occasion and determining common resource blocks corresponding to the N2 PSFCHs and the transmit power of the common resource blocks by means of: determining N2 to be equal to N1 or Nmax, or determining the N2 PSFCHs from N1 PSFCHs according to a priority order of the PSFCHs; determining the transmit power of the PSFCHs to be a required power of the PSFCHs, or X times the maximum power of the UE, or the maximum or minimum value in the above two values; sending the determined N2 PSFCHs and the common resource blocks corresponding to the N2 PSFCHs; and determining the transmit power of the common resource blocks to be a required power of the common resource blocks.