PUCCH Resource Allocation for Flexible 5G Uplink Control
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Solution Overview
Problem
Current fifth-generation cellular systems face challenges in achieving flexible and efficient communication due to reduced antennas and bandwidth, which limits system flexibility and efficiency.
Innovation Solution
The proposed solution involves a communication method and system that supports PUCCH frequency hopping indication and PRB index determination, allowing for improved communication flexibility and efficiency by dynamically adjusting PUCCH resource allocation based on specific frequency and bandwidth configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If reduced antennas and bandwidth are used, then UE complexity and cost are reduced, but system flexibility and efficiency are limited
Solution Approach 1:
The patent applies dynamics by enabling dynamic BWP switching and frequency hopping for PUCCH transmission. The UE can dynamically switch between different bandwidth parts and frequency locations based on scheduling decisions, allowing a device with reduced antennas and bandwidth to achieve enhanced system flexibility and adaptability without increasing hardware complexity
Solution Approach 2:
The patent utilizes parameter changes by modifying frequency domain parameters (frequency hopping indication, PRB index determination) and bandwidth parameters (BWP switching) to optimize PUCCH resource allocation. These parameter changes enable the system to adapt to different communication scenarios dynamically, resolving the contradiction between reduced device complexity and maintained system flexibility
2Device complexity
If reduced antennas and bandwidth are used, then UE cost is reduced, but system efficiency is limited
Solution Approach 1:
The patent implements dynamic BWP switching and frequency hopping mechanisms that allow efficient utilization of spectral resources. By dynamically adjusting bandwidth parts and frequency locations based on actual communication needs, the system maximizes throughput and efficiency despite using reduced antennas and bandwidth, thereby lowering UE cost without sacrificing system efficiency
Solution Approach 2:
The patent applies preliminary action through advance BWP configuration and frequency hopping indication in DCI messages. The network pre-configures multiple BWPs and indicates frequency hopping patterns before actual PUCCH transmission, allowing the UE to efficiently allocate resources in advance and avoid latency, thus maintaining high system efficiency with reduced hardware capabilities
Data Source
AI summary
A method by a user equipment (UE) is described. The method includes receiving, from a base station, system information including a first configuration of a first initial uplink (UL) BWP and a second configuration of a second initial UL BWP wherein the second configuration includes a first RRC parameter, the first RRC parameter configures a cell-specific physical uplink control channel (PUCCH) resource set on the second initial UL BWP, and the cell-specific PUCCH resource set includes one or more PUCCH resources, receiving a PDCCH with a DCI format scheduling a PDSCH, and transmitting, on a PUCCH resource of the one or more PUCCH resources, a PUCCH with HARQ-ACK information in response to the PDSCH in the second initial UL BWP, wherein whether the UE uses a first formula or a second formula to calculate a PRB index of the PUCCH resource is determined based on one, more or all of a first frequency domain location of the first initial UL BWP, a first bandwidth of the first initial UL BWP, a second frequency domain location of the second initial UL BWP, and a second bandwidth of the second initial UL BWP, wherein the first formula uses a size of the second initial UL BWP as one of terms of the first formula, and the second formula does not use the size of the second initial UL BWP as one of terms of the second formula.