NR PUCCH Power Control for Mixed-Priority UCI Reliability
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Solution Overview
Problem
Current PUCCH power control mechanisms in NR do not adequately account for UCI of different priority indices, leading to improper power adjustment when UCI with varying priorities is multiplexed.
Innovation Solution
The UE determines PUCCH power adjustment based on the PUCCH format and transport format, considering the number of high-priority and low-priority UCI bits, or the minimum of such bits, to ensure proper power adjustment when UCI consists of different priority indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH power control mechanisms do not differentiate between UCI priorities, then device complexity is reduced, but reliability of high-priority UCI transmission deteriorates when multiplexed with low-priority UCI
Solution Approach 1:
The patent segments the UCI transmission power control by priority levels. The UE determines separate power adjustments for high-priority and low-priority UCI bits based on their respective quantities and priorities. This segmentation allows high-priority UCI to receive adequate power allocation even when multiplexed with low-priority UCI, resolving the contradiction between maintaining simple power control mechanisms and ensuring reliable high-priority transmission.
2Measurement precision
If PUCCH power is adjusted based on total UCI bits without priority consideration, then ease of operation is improved, but power allocation accuracy for high-priority UCI deteriorates
Solution Approach 1:
The patent applies local quality by treating high-priority and low-priority UCI bits differently in the power control process. Instead of uniform power allocation based on total bit count, the UE calculates power adjustments locally for each priority level based on the quantity of bits at each priority. This ensures accurate power allocation for high-priority UCI while maintaining reasonable operational simplicity through standardized calculation procedures.
Data Source
AI summary
Systems and methods for enhanced Physical Uplink Control Channel (PUCCH) power control when missing Uplink Control Information (UCI) of different priorities are provided. In some embodiments, a method performed by a User Equipment (UE) for determining a power adjustment includes determining a PUCCH power adjustment with respect to a PUCCH format and/or Transport Format (TF); wherein determining the PUCCH power adjustment is based on one or more out of: a UCI consists of UCI with same priority index or different priority indices; a number of high-priority and/or low-priority UCI bits; and a minimum of high-priority and low-priority UCI bits. In this way, PUCCH power is able to be properly adjusted when UCI consists of UCI with different priority index.