Channel Sense Resource Allocation for Wireless Interference Isolation

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Solution Overview

Problem

Existing channel sense methods in wireless communications suffer from low accuracy due to interference from data transmission by other terminals in the same cell, which affects the reliability of channel interference sensing.

Innovation Solution

A network side device determines a sense resource for a terminal that is not used by other terminals in the same cell for data transmission, ensuring that any sensed interference is from neighboring cells, and provides indication information for the terminal to perform channel sense and data transmission on allocated resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the terminal performs channel sense on a resource that may be allocated to another terminal in the same cell for data transmission, then the sense resource can be reused efficiently, but the sense result accuracy deteriorates due to interference from intra-cell data transmission

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidsense result accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent segments the resource pool into sense resources and data transmission resources, clearly separating their functions. The network side device allocates specific resources for channel sensing that are distinct from resources allocated for data transmission, preventing interference and ensuring accurate sense results while maintaining efficient resource utilization through dedicated allocation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts the sense resource allocation function from the general resource pool, creating a dedicated sense resource pool that is separate from data transmission resources. This extraction ensures that sense operations are performed on resources not used for intra-cell data transmission, eliminating interference and improving measurement accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If the network side device allocates the same resource for both sense and data transmission, then resource efficiency is improved, but the reliability of channel sense deteriorates due to interference from data transmission

Engineering Contradiction:

Improveresource efficiencyVSAvoidchannel sense reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments resources into distinct sense resources and data transmission resources, with clear functional separation. The network side device maintains separate resource pools and allocation mechanisms for sensing and data transmission, ensuring that sense operations are not interfered with by intra-cell data transmission while preserving overall resource efficiency through dedicated allocation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The network side device acts as an intermediary that manages resource allocation, introducing control signaling to coordinate between sense resource allocation and data transmission resource allocation. This intermediary function ensures that resources are not simultaneously allocated for both purposes, preventing interference and maintaining sense reliability while optimizing overall system efficiency.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of time

If the terminal performs sense before scheduled transmission time, then the sense timing is optimized, but the sense resource may be interfered with by data transmission from other terminals in the same cell

Engineering Contradiction:

Improvesense timing optimizationVSAvoidsense result accuracy

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The patent segments the time-frequency resource space into distinct sense resources and data transmission resources. The network side device allocates specific time-frequency slots dedicated to channel sensing that are separated from slots allocated for data transmission, ensuring that early sense operations can be performed without interference from intra-cell data transmission while maintaining optimized timing.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3637935B1Channel interception method, network side device and terminal

Publication Date: 2023.02.22 HUAWEI TECH CO LTD

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AI summary

This application discloses a channel sense method, a network side device, and a terminal, and relates to the field of wireless communications technologies. The method includes: determining, by a network side device, a first sense resource used by a terminal to perform channel sense, where the first sense resource is another resource other than a resource that is in a cell in which the terminal is located and that is used by each terminal to perform data transmission; and sending, by the network side device, first sense indication information to the terminal, where the first sense indication information is used to indicate the first sense resource. To be specific, when the terminal performs sense on the first sense resource, another terminal in a same cell does not receive or send data on the first sense resource. If the terminal senses an interference signal, it can be determined that the interference signal is not an interference signal generated when the another terminal in this cell performs data transmission. Therefore, the channel sense performed by the terminal can be prevented from being interfered with by the data transmission performed by the another terminal in the same cell, thereby improving accuracy of a sense result.