Multi-Subframe Uplink Grants for CSI and Unlicensed Access

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing multi-carrier operations, particularly in scenarios involving carrier aggregation and dual connectivity, leading to high PUCCH load on primary cells and suboptimal resource utilization in unlicensed spectrum.

Innovation Solution

Implementing mechanisms for carrier aggregation and dual connectivity that include dynamic timing advance group management, listen-before-talk procedures for unlicensed spectrum access, and adaptive channel access techniques to optimize resource allocation and reduce load on primary cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If carrier aggregation and dual connectivity are implemented to improve multi-carrier communication efficiency, then resource utilization and load balancing are improved, but device complexity and protocol management complexity increase

Engineering Contradiction:

Improvemulti-carrier communication efficiencyVSAvoidprotocol management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the uplink grant into multiple parts distributed across different subframes. Each subframe contains a portion of the grant information, allowing the device to receive and process uplink scheduling information in a distributed manner across multiple time resources, thereby improving resource utilization while managing complexity through structured segmentation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic timing advance group management where the network can dynamically adjust timing advance values for different uplink transmissions across multiple subframes. This dynamic adjustment optimizes uplink synchronization and resource allocation in real-time, improving communication efficiency while adapting to changing channel conditions

Inventive Principle:

Principle #15Dynamics

2Reliability

If listen-before-talk procedures are implemented for unlicensed spectrum access, then fair coexistence with other technologies is improved, but access delay and resource utilization efficiency deteriorate

Engineering Contradiction:

Improvefair coexistenceVSAvoidaccess delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs listen-before-talk procedures in advance before uplink transmissions in unlicensed spectrum. By conducting channel sensing and clearance checks beforehand, the device ensures fair coexistence with other technologies while preparing transmission resources in advance, thereby reducing actual access delay when the channel becomes available

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent maintains continuous monitoring and preparation for uplink transmissions across multiple subframes in unlicensed spectrum. By keeping the transmission chain ready and continuously checking channel availability, the system minimizes idle time and ensures seamless transmission when conditions permit, reducing overall access delay while maintaining fair coexistence

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If dynamic timing advance group management is implemented, then uplink synchronization and resource allocation are improved, but control signaling overhead and processing complexity increase

Engineering Contradiction:

Improveuplink synchronizationVSAvoidcontrol signaling overhead

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent merges multiple timing advance adjustments into unified control signaling mechanisms. By consolidating timing advance management across different uplink grants and subframes, the network reduces redundant control signaling while maintaining precise uplink synchronization, thereby improving productivity without proportionally increasing signaling overhead

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements universal timing advance group management that serves multiple functions simultaneously. The same timing advance mechanisms are used across different carrier aggregates, dual connectivity scenarios, and uplink transmission types, reducing the need for separate control signaling for each scenario and thereby minimizing overall overhead while maintaining synchronization

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250274244A1Multi-subframe uplink grant in a wireless device

Publication Date: 2025.08.28 PENINSULA TECH LLC

AI summary

A base station sends, to a wireless device, a DCI that has a first field and a second field, the DCI indicating uplink resources in a number of consecutive physical uplink shared channel (PUSCH) time intervals. Employing the first field, the base station determines a position of a first time interval in the one or more consecutive uplink PUSCH time intervals, and receives, in the first PUSCH time interval, one or more CSI fields when the second field is set to trigger a CSI report. The DCI may also include a third field indicating one or more parameters for a wireless device to perform a listen-before-talk (LBT) procedure that indicates whether a channel is available for transmission in the first PUSCH time interval.