Configured Grant HARQ Identifier Collision Avoidance

Solution Overview

Problem

Conventional configured grant communications in wireless networks are prone to collisions due to unpredictable HARQ identifier value selection by user equipment, leading to increased processing, potential delays, and complexity when dynamic grants supersede configured grants.

Innovation Solution

User equipment communicates first and second configured grant communications with separate channel occupancy times, using second bit information to inform the wireless base station of planned HARQ identifier value usage, allowing the base station to make informed decisions and avoid collisions by allocating identifiers accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If user equipment randomly selects HARQ identifier values from a pool for configured grant communications, then transmission delay is eliminated and resource allocation efficiency is improved, but collisions occur when multiple devices or dynamic grants select the same identifier

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidcollision avoidance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by having user equipment report planned HARQ identifier values to the base station before actual transmission occurs. The base station receives this advance information about which identifiers will be used in future configured grant communications and can proactively allocate different identifiers to avoid collisions, rather than reacting after a collision has occurred.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by establishing a communication channel where user equipment provides information about its intended HARQ identifier selections to the base station. This feedback loop enables the base station to adjust its identifier allocation strategy based on actual device intentions, transforming the system from purely random selection to an informed allocation process that maintains efficiency while reducing collisions.

Inventive Principle:

Principle #23Feedback

2Reliability

If the wireless base station dynamically assigns HARQ identifier values to all user equipment, then collisions are avoided through centralized control, but transmission delay increases due to constant communication overhead

Engineering Contradiction:

Improvecollision avoidanceVSAvoidtransmission delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having user equipment report planned HARQ identifier values to the base station before actual transmission occurs. The base station receives this advance information about which identifiers will be used in future configured grant communications and can proactively allocate different identifiers to avoid collisions, rather than reacting after a collision has occurred.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements self-service by allowing user equipment to autonomously select HARQ identifier values from the allocated pool for configured grant communications. This self-selection mechanism eliminates the need for continuous dynamic grant assignments and base station intervention, reducing communication overhead and transmission delay while maintaining collision avoidance through the preliminary reporting mechanism.

Inventive Principle:

Principle #25Self-service

3Productivity

If user equipment uses configured grants with pre-defined resources, then resource allocation efficiency is improved, but processing complexity increases when dynamic grants supersede configured grants requiring payload re-encoding

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidprocessing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements feedback by establishing a communication channel where user equipment provides information about its intended HARQ identifier selections to the base station. This feedback loop enables the base station to adjust its identifier allocation strategy based on actual device intentions, transforming the system from purely random selection to an informed allocation process that maintains efficiency while reducing collisions.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11678334B2Enhancement of configured grant communications in a wireless network

Publication Date: 2023.06.13 CHARTER COMM OPERATING LLC

AI summary

According to one configuration, a system includes user equipment in communication with a wireless base station. The user equipment receives resource allocation information facilitating communication of wireless communications in a network environment. The user equipment is operable to: produce a first configured grant communication to include: i) first information specifying attributes (such as a first selected identifier value) of the first configured grant communication, and ii) second information specifying attributes (such as a second selected identifier value) of a second (buffered) configured grant communication to be communicated from the user equipment to the wireless base station after communication of the first configured grant communication to the wireless base station. The user equipment communicates the first configured grant communication to the wireless base station and then follows up with communication of the second configured grant communication to the wireless base station.