Per-Resource Block Power Offset for Sidelink Feedback Channels
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in power control for physical sidelink feedback channels (PSFCH), particularly in managing transmission power between resource blocks carrying ACK/NACK feedback and those in a common interlace, leading to excessive power consumption and diminished performance.
Innovation Solution
The proposed solution involves signaling a per-resource block (RB) power offset to user equipment (UE) from a network node, indicating the power difference between RBs carrying ACK/NACK feedback and those in a common interlace, allowing for efficient power allocation for PSFCH transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If uniform transmission power is used for all resource blocks in PSFCH, then implementation is simple, but power consumption is excessive and performance is diminished
Solution Approach 1:
The patent applies local quality by differentiating transmission power levels between different resource blocks within the PSFCH. Specifically, resource blocks carrying ACK/NACK feedback are assigned different power levels compared to resource blocks in the common interlace, allowing each local region to operate at its optimal power level for its specific function, thereby reducing overall power consumption while maintaining performance.
Solution Approach 2:
The patent implements parameter changes by introducing per-resource-block power offset values that modify the transmission power parameter for different RBs. The network node signals these power offset values to the UE, enabling dynamic adjustment of transmission power based on the specific resource block being used, which optimizes the balance between power consumption and communication performance.
2Reliability
If per-resource block power offset is signaled for PSFCH, then power consumption is reduced and performance is improved, but configuration complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the PSFCH resource blocks into different categories (those carrying ACK/NACK feedback versus those in the common interlace) and assigning different power control parameters to each segment. This segmentation allows targeted power optimization for each resource block type, improving reliability where needed while maintaining manageable configuration complexity through structured parameter assignment.
Solution Approach 2:
The patent utilizes feedback mechanisms where the network node signals power offset values to the UE based on observed channel conditions and feedback requirements. This feedback loop enables the system to adapt power levels dynamically, improving ACK/NACK feedback performance while the standardized feedback protocol keeps configuration complexity manageable.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating a power offset, per resource block, between one or more first resource blocks to carry acknowledgement/negative acknowledgement feedback and one or more second resource blocks in a common interlace. The UE may transmit, using the power offset and using a transmission power that depends on whether a downlink pathloss value is indicated in the configuration information, a physical sidelink feedback channel transmission in the one or more first resource blocks and the one or more second resource blocks. Numerous other aspects are described.