Wireless Access Feedback for Zero-Power Device Collision Reduction

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Solution Overview

Problem

Traditional anti-collision algorithms for zero-power devices result in excessive communication delay when accessing a large number of devices, such as in logistics, such as logistics warehousing management, shopping in supermarkets, where a large number of zero-power devices need to communicate quickly without omissions.

Innovation Solution

A method for wireless communication that involves sending a first message on a second frequency domain resource with finer granularity than the first frequency domain resource, and determining whether to retransmit the message based on a received response, reducing the probability of collisions and communication delay.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If traditional anti-collision algorithms are used to enable access of a large number of zero-power devices, then the access capability is improved, but the communication delay increases excessively

Engineering Contradiction:

Improvenumber of zero-power devicesVSAvoidcommunication delay

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The frequency domain resource is divided into multiple first frequency domain resources, each containing multiple second frequency domain resources. This hierarchical segmentation allows devices to access different resource groups, reducing collision probability while maintaining scalable access capacity for large numbers of zero-power devices

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a two-dimensional frequency resource structure (first frequency domain resources as groups, second frequency domain resources as individual units within groups) to resolve the contradiction. This dimensional organization enables both high device capacity and reduced delay by providing multiple access paths simultaneously

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If traditional anti-collision algorithms are used to handle communications of zero-power devices, then the access reliability is improved, but the communication efficiency deteriorates

Engineering Contradiction:

Improveaccess reliabilityVSAvoidcommunication efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The second device sends feedback information to the first device regarding the successful reception of data. This feedback mechanism enables the first device to determine whether retransmission is necessary, improving reliability through confirmation while enhancing efficiency by avoiding unnecessary retransmissions and reducing overall communication delay

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250386380A1Wireless communication method, first device and second device

Publication Date: 2025.12.18 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided are a wireless communication method, a first device and a second device. The method includes: a first message is sent to a second device on at least one second frequency domain resource in at least one first frequency domain resource, wherein the first frequency domain resource includes one or more second frequency domain resources; a second message sent by the second device is received; and sending the first message is stopped or the first message is retransmitted based on the second message.