TXOP Sharing for Ambient Energy Uplink Channel Access

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Solution Overview

Problem

Ambient energy-based communication devices lack the capability for channel preemption, making it difficult for them to acquire channels for signal transmission in unlicensed spectra.

Innovation Solution

A method where a second device transmits a frame carrying information to determine a transmission opportunity (TXOP) preempted by the second device, allowing the first device to share this TXOP without performing channel preemption, thereby enabling signal transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If ambient energy-based communication devices perform channel preemption to acquire TXOP for uplink transmission, then transmission capability is improved, but device complexity and cost increase

Engineering Contradiction:

Improvetransmission capabilityVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces a network device as an intermediary that performs channel preemption on behalf of ambient energy-based communication devices. The network device acquires TXOP and shares it with the communication device, eliminating the need for the communication device to implement channel preemption capabilities itself, thus reducing device complexity while maintaining transmission capability

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The network device performs channel preemption autonomously and shares the acquired TXOP with ambient energy-based communication devices. This self-service mechanism allows the communication devices to benefit from channel preemption without implementing the complex preemption logic themselves, as the network device handles this function independently

Inventive Principle:

Principle #25Self-service

2Productivity

If ambient energy-based communication devices implement channel preemption capability, then TXOP acquisition is improved, but device cost increases

Engineering Contradiction:

ImproveTXOP acquisition capabilityVSAvoiddevice cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The network device serves as an intermediary that performs channel preemption and TXOP acquisition on behalf of ambient energy-based communication devices. By offloading this function to the network device, the communication devices avoid the cost of implementing channel preemption capabilities while still benefiting from TXOP acquisition

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Instead of each communication device independently implementing channel preemption capability, the system uses a single network device that copies the preemption function and shares the acquired TXOP with multiple communication devices, reducing overall system cost

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20250365713A1Channel preemption methods and apparatuses, and communication device

Publication Date: 2025.11.27 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided are channel preemption methods and apparatuses, and a communication device. A channel preemption method includes: a first device receiving a first frame sent by a second device, where the first frame carries first information, the first information is used for determining a transmission opportunity (TXOP), and the TXOP is preempted by the second device and used for uplink sending.