NRIV Calculation for PDSCH Resource Allocation in SCG
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Solution Overview
Problem
Current communication systems, such as LTE and emerging New Radio (NR) standards, face challenges in efficiently managing resource allocation for PDSCH and HARQ-ACK in Secondary Cell Groups (SCGs), leading to suboptimal communication performance.
Innovation Solution
The proposed solution involves a terminal apparatus and base station apparatus that utilize specific frequency domain resource allocation rules for PDCCH and PDSCH, where the value NRIV is calculated based on the number of resource blocks and the starting resource block in the downlink BWP, ensuring efficient scheduling and acknowledgment transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency domain resource allocation is optimized using the proposed NRIV calculation method, then communication efficiency is improved, but device complexity increases due to additional calculation operations
Solution Approach 1:
The patent changes the parameter calculation method for frequency domain resource allocation by introducing a new NRIV calculation that considers both the number of resource blocks (LRBs) and the starting resource block position (RBstart). This parameter transformation enables more efficient resource allocation by optimizing the mapping between DCI format values and actual physical resource blocks, thereby improving communication efficiency while managing device complexity through a systematic mathematical approach.
2Manufacturing precision
If resource allocation precision is improved through detailed NRIV calculation, then scheduling accuracy is improved, but processing time increases
Solution Approach 1:
The patent replaces complex iterative resource allocation mechanisms with a direct mathematical calculation system. By substituting the traditional mechanical resource allocation process with a closed-form NRIV calculation formula, the system achieves high scheduling accuracy without incurring additional processing time delays. The mathematical substitution eliminates the need for iterative searches or complex decision trees, providing both precision and speed.
Data Source
AI summary
A terminal apparatus includes a receiver configured to monitor a PDCCH with a DCI format on an active downlink BWP in a serving cell in a Secondary Cell Group (SCG), the DCI format being used for scheduling a PDSCH, and receive the PDSCH on the downlink BWP, and a transmitter configured to transmit a HARQ-ACK on a PUCCH. A value NRIV of a frequency domain resource allocation field included in the DCI format is equal to NsizeBWP*(LRBs−1)+RBstart, in a case that LRBS−1 is equal to or smaller than floor(NsizeBWP*2), the value NRIV is equal to NsizeBWP*(NsizeBWP−LRBs+1)+(NsizeBWP−1−RBstart) in a case that LRBS−1 is larger than floor(NsizeBWP/2), the floor(NsizeBWP/2) represents a largest integer within a range that does not exceed NsizeBWP/2, the RBstart is a starting resource block for allocation of the PDSCH, the LRBs is a number of resource blocks allocated to the PDSCH, and the NsizeBWP is given based on the number of resource blocks in an initial downlink BWP configured by a first parameter in a case that the DCI format is detected in a common search space.