Uplink Resource Occupation Indication in Unlicensed Spectrum

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Solution Overview

Problem

In License Assisted Access (LAA) communication, base stations are unsure whether they can jointly occupy frequency domain resources with terminals in unlicensed frequency bands, leading to inefficient resource utilization.

Innovation Solution

A method where terminals detect idle frequency domain resources and transmit uplink information indicating whether base stations can jointly occupy these resources, allowing for coordinated communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the terminal occupies frequency domain resources in an unlicensed frequency band, then the terminal can initiate communication, but the base station cannot determine whether it can jointly occupy the frequency domain resources with the terminal

Engineering Contradiction:

Improveterminal's ability to initiate occupation of frequency domain resourcesVSAvoidbase station's lack of knowledge about joint occupation capability

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The terminal feeds back occupation indication information to the base station through uplink information, explicitly indicating whether the base station can jointly occupy the frequency domain resources with the terminal. This feedback mechanism resolves the information asymmetry and enables the base station to make informed decisions about joint occupation.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If the base station initiates occupation of frequency domain resources, then the base station and terminal can jointly occupy resources, but the terminal cannot initiate occupation independently

Engineering Contradiction:

Improvecommunication initiation flexibilityVSAvoidresource occupation coordination mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system dynamically adapts the resource occupation mode based on terminal capability and network conditions. Terminals with the capability to detect idle resources and send occupation indication information can initiate occupation, while other terminals rely on base station initiation. This dynamic approach enhances flexibility without requiring complex coordination mechanisms for all terminals.

Inventive Principle:

Principle #15Dynamics

3Loss of information

If the terminal transmits uplink information indicating joint occupation capability, then the base station can determine resource occupation status, but additional signaling overhead is introduced

Engineering Contradiction:

Improvebase station's knowledge of resource occupation statusVSAvoiduplink information signaling overhead

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The occupation indication information is extracted and embedded within existing uplink information structures rather than requiring separate dedicated signaling. This approach provides the necessary information to the base station while minimizing additional signaling overhead by utilizing already-transmitted uplink resources.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12063630B2Method and device for indicating resource occupation state, and method and device for determining resource occupation state

Publication Date: 2024.08.13 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method is provided for indicating a resource occupation state. The method includes: performing detection with respect to a first frequency domain resource within an unlicensed frequency band to determine whether the first frequency domain resource is free; and if so, using the first frequency domain resource to transmit uplink information to a base station, where the uplink information provides indications including an indication stating whether the base station and a terminal can co-occupy the first frequency domain resource.