Wireless TXOP Preemption via Reserved Frequency Units
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Solution Overview
Problem
Existing wireless communication systems struggle to efficiently transmit event-driven, low-latency traffic due to its unpredictability, leading to challenges in resource allocation and potential interference.
Innovation Solution
A wireless communication method and device that allows a first station to reserve frequency domain units for a second station to report low-latency traffic or preempt a transmission opportunity (TXOP) using techniques like preamble puncturing, overlapping PPDU design, and smaller interframe spaces to ensure timely transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pre-scheduling resources are used for traffic transmission, then resource allocation is simplified, but low-latency traffic cannot be transmitted efficiently due to its unpredictability
Solution Approach 1:
The system performs preliminary actions by reserving frequency domain units in advance within the uplink transmission, creating a pre-configured resource pool that can be immediately allocated to low-latency traffic when needed, without requiring complex real-time scheduling decisions
Solution Approach 2:
The patent introduces an intermediary mechanism where the first STA reserves frequency domain units that serve as a buffer resource, mediating between the scheduled uplink transmission and the unpredictable low-latency traffic requirements, allowing seamless resource allocation when latency-sensitive traffic arrives
2Reliability
If frequency domain units are reserved for low-latency traffic reporting, then transmission reliability improves, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies local quality by reserving only specific frequency domain units (partial resources) within the uplink transmission rather than dedicating entire resources, allowing the system to maintain reliable transmission paths for low-latency traffic while keeping other frequency resources available for general use
Solution Approach 2:
The system performs partial action by reserving a limited number of frequency domain units sufficient for low-latency traffic reporting without over-provisioning, achieving adequate reliability while avoiding excessive resource consumption that would reduce overall system productivity
3Speed
If the second STA preempts the first TXOP for low-latency traffic, then transmission speed improves, but interference and conflict increase
Solution Approach 1:
The system performs preliminary action by pre-configuring frequency domain units within the existing TXOP structure, allowing the second STA to access reserved resources without preempting the entire transmission opportunity, thus achieving fast access while maintaining transmission order and reducing interference
Solution Approach 2:
The patent segments the TXOP into dedicated frequency domain units that can be independently accessed by the second STA for low-latency traffic, allowing simultaneous transmissions without mutual interference while maintaining overall system coordination
Data Source
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AI summary
Provided are a wireless communication method and a device. The method comprises: in a first TXOP, a first STA sending first uplink transmission to an AP, wherein the first STA reserves one or more frequency-domain units in the first uplink transmission, the one or more frequency-domain units are used for reporting first indication information by means of a second STA, and the first indication information is used for indicating that the second STA includes low-latency traffic to be transmitted, and/or the second STA needs to preempt the first TXOP. By means of the one or more frequency-domain units reserved by the first STA, the second STA may report the first indication information. On the basis of the first indication information, the second STA may preempt the first TXOP, thereby transmitting the low-latency traffic in a timely manner.