Dynamic Channel Access Selection for Unlicensed Bands

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Solution Overview

Problem

There is no clear method for selecting a channel access mechanism for unlicensed bands in communications systems, which affects the performance of wireless communication systems.

Innovation Solution

A channel access selection method and apparatus that obtain first information, such as statistical data or transmission priority, to determine whether to use an LBT or non-LBT channel access mechanism for unlicensed bands, allowing communication devices to flexibly select the appropriate mechanism based on specific conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If LBT channel access mechanism is used for unlicensed band, then channel access fairness is improved, but system productivity deteriorates due to additional listening time

Engineering Contradiction:

Improvechannel access fairnessVSAvoidsystem throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements dynamic channel access mechanism selection that adapts to different transmission scenarios. The system dynamically switches between LBT and non-LBT mechanisms based on transmission type, priority, and channel conditions, allowing optimal performance in varying situations rather than using a fixed mechanism for all cases.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of channel access mechanism selection by introducing multiple mechanisms (LBT and non-LBT) with different characteristics. The system selects appropriate mechanisms based on transmission parameters such as priority levels, transmission types, and channel conditions, effectively changing the access behavior to match requirements.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If non-LBT channel access mechanism is used for unlicensed band, then system productivity is improved, but channel access fairness deteriorates

Engineering Contradiction:

Improvesystem throughputVSAvoidchannel access fairness

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies different channel access mechanisms to different transmission scenarios locally. High-priority transmissions may use non-LBT for speed, while low-priority or contention-sensitive transmissions use LBT for fairness. This localized application of different mechanisms optimizes overall system performance.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If multiple channel access mechanisms are provided for selection, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvechannel access flexibilityVSAvoidselection mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system performs self-service by automatically selecting the appropriate channel access mechanism based on pre-defined criteria and current channel conditions. The selection process is autonomous, using configured parameters and real-time information to determine the optimal mechanism without manual intervention, thereby managing complexity internally while providing adaptability externally.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20230232446A1Channel access selection method and apparatus, communication device, and readable storage medium

Publication Date: 2023.07.20 VIVO MOBILE COMM CO LTD

AI summary

A channel access selection method and apparatus, a communication device, and a readable storage medium, are provided. The channel access selection method includes: the communication device obtains first information and selects a channel access mechanism for an unlicensed band according to the first information. The first information includes statistical information of a channel’s historic state, a transmission type, a transmission priority, or the like.