PUCCH Resource Index Determination for Interlace Transmission
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Solution Overview
Problem
Current communication systems, particularly in LTE and NR, face inefficiencies in uplink and downlink transmission due to challenges in mapping physical resource blocks for the physical uplink control channel (PUCCH), which affects the reception and transmission processes in terminal and base station apparatuses.
Innovation Solution
The solution involves determining specific indexes for physical resource blocks (PRBs) to which the PUCCH is mapped, based on the resource block used for interlace, the number of interlaces, and the starting PRB within a bandwidth part (BWP), enabling efficient transmission and reception of PUCCH in both terminal and base station apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUCCH is transmitted using interlace in BWP, then transmission efficiency is improved, but resource block index determination complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the PRB index determination method based on the BWP configuration and interlace usage. The formula for calculating PRB indexes changes depending on whether interlace is used and the specific BWP parameters (starting PRB, number of interlaces), allowing the system to optimize transmission efficiency while managing complexity through parameter adaptation rather than fixed complex logic
Solution Approach 2:
The patent segments the resource block allocation into specific interlace units within the BWP. By dividing the total PRBs into multiple interlaces and calculating indexes based on interlace number and starting PRB, the system manages complexity through structured segmentation rather than handling all PRBs as a single complex unit
2Measurement precision
If PUCCH mapping is optimized for interlace transmission, then reception accuracy is improved, but processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the PRB index mapping relationships in the terminal apparatus. The determination formulas for PRB indexes based on interlace configuration are established in advance, allowing the terminal to quickly retrieve and apply the correct mapping without performing complex real-time calculations during transmission, thus reducing processing time while maintaining reception accuracy
Data Source
AI summary
A terminal apparatus includes a processing circuitry configured to determine one or multiple first indexes of one or multiple physical resource blocks (PRBs) to which a physical uplink control channel (PUCCH) is mapped, and a transmitting circuitry configured to transmit the PUCCH in a bandwidth part (BWP). In a case that the PUCCH is transmitted using an interlace, the one or multiple first indexes are determined based on a resource block (RB) used for the interlace, the number of interlaces, and the number of the one or multiple PRBs from zero to a starting PRB of the BWP in a common resource block (CRB) index.