Sidelink Carrier Aggregation Feedback Channel Alignment

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In wireless communication systems, particularly in sidelink communications, conventional resource selection methods are inefficient due to misalignment of feedback channels across different carriers, leading to resource wastage and inefficient power utilization.

Innovation Solution

A user equipment (UE) selects a subset of component carriers for sidelink message transmission based on feedback channel alignment rules, ensuring time-aligned feedback channels across multiple transmission time intervals, thereby optimizing resource usage and reducing wastage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional resource selection methods are used for sidelink transmissions on multiple component carriers, then carrier aggregation capacity is utilized, but feedback channel misalignment causes resource wastage and inefficient power utilization

Engineering Contradiction:

Improveresource efficiencyVSAvoidpower utilization efficiency

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent changes the parameter of feedback channel timing alignment by selecting component carriers based on aligned feedback channel configurations. The UE identifies and selects component carriers where feedback channels are synchronized in time, transforming the resource selection process from carrier-agnostic to configuration-aware, thereby eliminating resource wastage caused by misalignment.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent segments the set of configured component carriers into subsets based on feedback channel alignment characteristics. The UE divides available carriers into aligned and unaligned groups, selectively operating on aligned carriers for simultaneous transmissions, thereby isolating and eliminating the source of resource inefficiency.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If feedback channels are not aligned across component carriers, then more flexible carrier configurations are supported, but resource wastage occurs during simultaneous transmissions

Engineering Contradiction:

Improvecarrier configuration flexibilityVSAvoidresource wastage

Core Design Contradiction:

Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The patent introduces dynamic carrier selection based on real-time feedback channel alignment status. The UE adaptively chooses which component carriers to use for simultaneous transmissions by evaluating their feedback channel configurations, making the system flexible enough to handle both aligned and unaligned carrier scenarios while optimizing performance.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies different operational characteristics to different component carriers based on their individual feedback channel configurations. Carriers with aligned feedback channels are selected for simultaneous transmissions, while carriers with unaligned configurations are excluded, creating a localized optimization strategy that preserves overall system flexibility.

Inventive Principle:

Principle #3Local quality

3Productivity

If multiple component carriers are used for sidelink messages, then transmission capacity increases, but misaligned feedback channels lead to inefficient resource usage

Engineering Contradiction:

Improvetransmission capacityVSAvoidresource usage efficiency

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent performs preliminary evaluation of feedback channel alignment status before initiating simultaneous transmissions on multiple component carriers. The UE checks the feedback channel configurations of available carriers in advance, identifies aligned carriers, and prepares the transmission plan accordingly, preventing resource wastage before it occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent enables the UE to autonomously select appropriate component carriers based on their own feedback channel alignment characteristics without requiring external coordination. The device self-evaluates the alignment status of its configured carriers and makes independent decisions about which carriers to use for simultaneous transmissions, optimizing resource efficiency independently.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11743866B2Resource selection methods for unaligned feedback transmissions for sidelink carrier aggregation

Publication Date: 2023.08.29 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive control signaling indicating a plurality of component carriers of a sidelink channel and a plurality of feedback channel configurations for the plurality of component carriers. The UE may select, based at least in part on the plurality of feedback channel configurations, a subset of the plurality of component carriers for transmission of a first sidelink message and a second sidelink message using a feedback channel alignment rule indicating to select component carriers having feedback channels aligned in time for at least a subset of a plurality of transmission time intervals. The UE may transmit the first sidelink message on a first component carrier of the subset and the second sidelink message on a second component carrier of the subset.