PSFCH Power Allocation in Multi-Carrier Sidelink
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating transmission power for Physical Sidelink Feedback Channels (PSFCH) in multi-carrier scenarios, particularly when there are limitations in total transmission power and simultaneous transmissions across multiple carriers.
Innovation Solution
The proposed solution involves prioritizing PSFCH transmissions with higher priority across multiple carriers and allocating power accordingly. This includes determining the actual number and power of simultaneous PSFCH transmissions based on the UE's total transmission power and capability, ensuring that higher priority transmissions are maintained even in power-limited scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is allocated to maintain higher priority PSFCH transmissions across multiple carriers, then reliability of sidelink communications is improved, but total transmission power consumption increases
Solution Approach 1:
The patent applies local quality by allocating different power levels to different carriers based on their specific needs. Higher priority PSFCH transmissions receive adequate power to maintain reliability, while lower priority transmissions on less critical carriers receive reduced power. This selective power allocation ensures that critical communications maintain high reliability without unnecessarily consuming power across all carriers.
Solution Approach 2:
The patent dynamically changes the transmission power parameter based on priority levels and channel conditions. By adjusting the power parameter adaptively - increasing power for high-priority PSFCH transmissions and decreasing power for low-priority transmissions - the system maintains reliability where needed while reducing overall power consumption.
2Productivity
If the number of simultaneous PSFCH transmissions across multiple carriers is increased, then productivity of sidelink feedback is improved, but device complexity increases
Solution Approach 1:
The patent segments the simultaneous PSFCH transmissions across multiple carriers, organizing them by priority levels and carrier indices. This segmentation allows the UE to systematically manage multiple transmissions by dividing them into manageable groups, reducing the complexity of coordinating simultaneous transmissions while maintaining high productivity through efficient resource utilization.
Solution Approach 2:
The patent implements dynamic management of simultaneous PSFCH transmissions by allowing the UE to adaptively select which transmissions to perform based on current power availability, priority requirements, and capability constraints. This dynamic approach enables the system to handle varying numbers of simultaneous transmissions without requiring fixed complex infrastructure, improving productivity while managing device complexity.
Data Source
AI summary
Apparatus and methods are provided for a user equipment (UE) to control sidelink power allocation on multiple carriers. The UE determines, from among a plurality of physical sidelink feedback channels (PSFCHs) scheduled for simultaneous transmission on the multiple carriers, prioritized PSFCHs to simultaneously transmit across the multiple carriers based at least in part on a capability of the UE for a maximum number of simultaneous PSFCH transmissions per carrier of the multiple carriers and a total transmission power PCMAX of the UE, where j is an index of a jth-carrier of the multiple carriers. The UE determines allocated transmission power for the prioritized PSFCHs. Then, the UE simultaneously transmits the prioritized PSFCHs on the multiple carriers according to the allocated transmission power.