PUCCH Resource Allocation Modes for SBFD Frequency Hopping

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Solution Overview

Problem

Existing technologies face challenges in efficiently allocating radio resources for uplink channels in Sub-Band Full Duplex (SBFD) operations, leading to issues such as improper frequency hopping, increased processing complexity, and uncontrolled frequency domain resource allocation, particularly for physical uplink shared channels (PUSCH) and physical uplink control channels (PUCCH).

Innovation Solution

A wireless terminal selects between different resource allocation modes to determine radio resources for uplink channels, using processor circuitry to choose between first and second resource allocation modes based on SBFD configurations, and transmits using the selected resources, while base stations receive these channels using corresponding resource allocation modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If Sub-Band Full Duplex (SBFD) operations are implemented for simultaneous uplink and downlink transmissions, then network capacity and spectral efficiency are improved, but interference control and resource allocation complexity increase

Engineering Contradiction:

Improvenetwork capacityVSAvoidresource allocation complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the frequency spectrum into multiple sub-bands, allowing different uplink and downlink resource allocations in different frequency segments. This enables simultaneous UL/DL transmissions while controlling interference through frequency-domain separation, thus improving network capacity while managing resource allocation complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different resource allocation strategies and interference mitigation techniques to different sub-bands based on local conditions. Each sub-band can have customized UL/DL configurations, power control parameters, and resource allocation rules, allowing optimized performance while managing overall system complexity.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If flexible TDD patterns are used to balance uplink and downlink traffic, then adaptability to traffic demands is improved, but uplink coverage and transmission power limitations worsen

Engineering Contradiction:

Improvetraffic demand adaptabilityVSAvoiduplink coverage

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent transitions from time-domain TDD patterns to frequency-domain SBFD resource allocation. By introducing frequency sub-bands as an additional dimension for resource management, the system can provide flexible UL/DL configurations while ensuring adequate uplink coverage through dedicated uplink sub-bands with appropriate power control, thus improving both adaptability and reliability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If frequency hopping is implemented for PUSCH transmissions, then frequency diversity and robustness are improved, but processing complexity and resource determination difficulty increase

Engineering Contradiction:

Improvefrequency diversityVSAvoidprocessing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent pre-configures frequency hopping patterns, resource offsets, and sub-band assignments through higher-layer signaling before actual PUSCH transmissions. This preliminary configuration reduces real-time processing complexity while maintaining frequency diversity benefits, as the UE can follow predetermined hopping patterns without complex real-time calculations.

Inventive Principle:

Principle #10Preliminary action

4Adaptability or versatility

If multiple PRACH resources are allocated for different SBFD configurations, then random access capability in diverse scenarios is improved, but resource selection complexity and processing overhead increase

Engineering Contradiction:

Improverandom access capabilityVSAvoidresource selection complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent implements dynamic PRACH resource selection where the UE can adaptively choose between different PRACH resources based on current SBFD configuration and channel conditions. The system provides multiple PRACH resource options with different associations to UL sub-bands, allowing flexible random access while managing selection complexity through clear selection criteria and higher-layer configuration guidance.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250374331A1User equipments and methods for determining time-frequency resource set for enhanced duplex operation

Publication Date: 2025.12.04 SHARP KK

AI summary

A wireless terminal of a cellular telecommunication system comprises processor circuitry and transmitter circuitry. The processor circuitry is configured to select between a first resource allocation mode and a second resource allocation mode for determining a radio resource(s) to use for a physical uplink control channel. The transmitter circuitry is configured to transmit the physical uplink control channel using the radio resource(s) of a selected resource allocation mode.