Terminal PUCCH Repetition Hopping Across Slots and PRBs
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Solution Overview
Problem
Existing communication systems in LTE and NR face challenges in efficiently managing the repetition and allocation of PUCCH transmissions, particularly in terms of slot configuration and resource block utilization, which affects communication efficiency.
Innovation Solution
A terminal and base station apparatus are designed to configure PUCCH repetition across multiple slots, determine hopping patterns, and allocate PUCCH transmissions in specific resource blocks based on higher layer parameters, enhancing communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH repetition is configured across multiple slots with fixed PRB allocation, then transmission reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies frequency hopping to dynamically change the PRB allocation for PUCCH repetitions across different slots. Instead of using a fixed PRB, the system hops to different PRBs based on a hopping pattern determined by parameters like hopStartPRB and hopDeltaPRB. This dynamic resource allocation improves resource utilization efficiency while maintaining transmission reliability through diversity.
2Adaptability or versatility
If multiple hopping patterns are available for PUCCH, then adaptability to different channel conditions is improved, but device complexity increases
Solution Approach 1:
The patent uses parameter-based configuration to manage hopping patterns. Higher layer parameters (RRC signaling) configure the hopping characteristics including hopStartPRB, hopDeltaPRB, and hopping pattern indices. The terminal determines the specific hopping pattern by combining these configured parameters with slot index and other dynamic variables, achieving adaptability without requiring complex stored pattern tables.
3Reliability
If PUCCH repetition is allocated in multiple PRBs through hopping, then frequency diversity gain is improved, but scheduling complexity increases
Solution Approach 1:
The patent implements self-service hopping where the terminal autonomously determines its own PRB allocation for each PUCCH repetition based on pre-configured parameters and current slot information. The hopping behavior is self-determined using formulas that combine configured parameters (hopStartPRB, hopDeltaPRB) with dynamic variables (slot index, PUCCH format), eliminating the need for complex base station scheduling decisions for each repetition.
Data Source
AI summary
A terminal apparatus includes a receiver configured to receive a PDCCH including a DCI format indicating transmission of a PUCCH, and a transmitter configured to transmit the PUCCH. The number of slots NrepeatPUCCH is configured by a higher layer parameter NrofSlots, the PUCCH is repeated in the NrepeatPUCCH slots, a first PRB is configured by a higher layer parameter StartingPRB, a second PRB is configured by a higher layer parameter SecondHopPRB, one hopping pattern is determined based on the DCI format, and whether repetition of the PUCCH in each of the NrepeatPUCCH slots is allocated at least in the first PRB or at least in the second PRB is determined based on the one hopping pattern.