Uplink Control Information Resource Selection via Cyclic Shift Ramping

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Solution Overview

Problem

Next-generation wireless communication systems face challenges in efficiently managing uplink control information transmission across multiple resource block sets due to limitations in cyclic shift ramping and resource allocation, particularly in unlicensed frequency bands, which affects communication performance and peak-to-average power ratio (PAPR).

Innovation Solution

The implementation of cyclic shift ramping across successive resource block sets with different cyclic shift sets and root sequences, where each set of contiguous resource blocks uses a unique cyclic shift and root sequence to optimize transmission, reducing PAPR and improving communication efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cyclic shift ramping is applied across multiple resource block sets, then communication performance and PAPR are improved, but device complexity increases due to multiple cyclic shift sets and root sequences

Engineering Contradiction:

Improvecommunication performanceVSAvoidcyclic shift configuration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the resource blocks into multiple sets (first RB set, second RB set, etc.) and applies different cyclic shift sets to each segment. This allows optimized PAPR control for each segment while managing overall system complexity through structured division of the frequency domain resources.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different cyclic shift sets are applied to different resource block sets based on their specific characteristics and requirements. The first RB set uses a first cyclic shift set while the second RB set uses a second cyclic shift set, allowing localized optimization of PAPR and communication performance for each region of the frequency spectrum.

Inventive Principle:

Principle #3Local quality

2Loss of energy

If multiple root sequences are used for different RB sets, then PAPR is minimized and communication efficiency is improved, but the complexity of resource allocation and processing increases

Engineering Contradiction:

ImprovePAPRVSAvoidresource allocation complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent changes the parameter of root sequence based on the resource block set index. Different root sequences are assigned to different RB sets to minimize PAPR. This parameter change approach allows systematic optimization of power characteristics while maintaining manageable complexity through structured parameter assignment.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11683805B2Resource selection for communicating uplink control information

Publication Date: 2023.06.20 QUALCOMM INC

AI summary

Resource selection for communication of uplink control information may include determining cyclic shift ramping for resource block (RB) sets. A user equipment UE) may use one or more RB sets for transmitting uplink control information on a shared radio frequency spectrum such as an unlicensed band. In some examples, the UE may transmit uplink control information to a base station (BS) via consecutive RB sets. To this end, the BS may schedule consecutive RB sets for an uplink transmission by the wireless communication device and monitor each of these RB sets for uplink control information.