Multi-PRB PUCCH Resource Allocation for Enhanced Uplink Coverage
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Solution Overview
Problem
Uplink transmission is limited by maximum power spectral density (PSD) and maximum equivalent isotropically radiated power (EIRP), restricting the coverage of physical uplink control channel (PUCCH) formats 0/1/4 to a single physical resource block (PRB), which is inadequate for enhanced coverage.
Innovation Solution
The method involves determining a target PUCCH resource that includes multiple PRBs per hop unit, allowing for enhanced coverage by configuring PUCCH formats 0/1/4 to occupy multiple contiguous PRBs within the initial uplink bandwidth part (BWP).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If PUCCH transmission is limited to one PRB due to PSD and EIRP constraints, then power spectral density and equivalent isotropically radiated power requirements are satisfied, but coverage of PUCCH transmission is limited
Solution Approach 1:
The patent divides the PUCCH transmission into multiple segments across different PRBs within the initial uplink BWP. By segmenting the transmission across multiple PRBs rather than concentrating it in a single PRB, the system achieves broader coverage while maintaining compliance with PSD and EIRP constraints through distributed power allocation.
Solution Approach 2:
The patent transitions from a single-PRB transmission approach to a multi-PRB transmission approach, effectively adding the dimension of frequency spread. This dimensional change allows the system to overcome the coverage limitations of single-PRB transmission while managing power constraints through distribution across multiple frequency resources.
2Area of stationary object
If multiple PRBs are used for PUCCH transmission to enhance coverage, then coverage is improved, but the number of PUCCH resources that can be supported increases
Solution Approach 1:
The patent makes the initial uplink BWP universal by enabling it to support multiple PUCCH resources simultaneously across multiple PRBs. This multi-functional approach allows the same initial BWP to serve multiple purposes - supporting both single-PRB and multi-PRB transmission modes, and accommodating multiple PUCCH resources with different formats (0/1/4) across the available PRBs.
Solution Approach 2:
The patent introduces dynamic adaptability in PUCCH resource allocation, where the system can dynamically determine which PRBs to use based on coverage requirements and power constraints. The number and configuration of PUCCH resources can be dynamically adjusted within the initial uplink BWP to match actual transmission needs rather than being fixed.
3Reliability
If PUCCH resources are adjusted to align with bandwidth limitations, then compliance with PSD and EIRP constraints is achieved, but transmission coverage is reduced
Solution Approach 1:
The patent changes the parameter of PRB utilization from a fixed single-PRB allocation to a flexible multi-PRB allocation. By adjusting the number of active PRBs and the power distribution across them, the system can achieve both compliance with PSD/EIRP constraints and adequate coverage, resolving the contradiction between these two requirements through parameter optimization.
Data Source
AI summary
A method for wireless communication, a terminal device, and a network device are provided. The method for wireless communication includes the following. The terminal device determines a physical resource block (PRB) position of a target PUCCH resource for a PUCCH in an initial uplink BWP, where the target PUCCH resource includes at least one PRB per hop unit. The terminal device transmits the PUCCH on the target PUCCH resource.