Wireless Resource Preemption for Low-Latency Traffic Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Event-driven low-latency traffic in wireless communication systems is unpredictable, making it difficult to schedule resources effectively, leading to inefficiencies and interference in existing transmission methods.
Innovation Solution
A wireless communication method and device that allows for reserving frequency domain units for low-latency traffic indication and preemption, using techniques such as preamble puncturing, overlapping PPDUs, and smaller interframe spaces to manage and prioritize low-latency data 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 effectively due to unpredictability
Solution Approach 1:
The system performs preliminary actions by reserving frequency domain units in advance within ongoing uplink transmissions. These reserved units are pre-prepared for potential low-latency traffic indications, allowing the system to respond quickly when such traffic arrives without needing to reallocate resources from scratch.
Solution Approach 2:
The system dynamically adjusts resource allocation by allowing second STAs to indicate low-latency traffic needs through reserved frequency domain units during ongoing transmissions. The AP can then dynamically preempt the TXOP based on these indications, enabling flexible adaptation to unpredictable low-latency traffic requirements while maintaining structured resource management.
2Reliability
If frequency domain units are reserved for low-latency indication, then low-latency traffic transmission is improved, but available resources for other traffic are reduced
Solution Approach 1:
The system applies local quality by reserving only specific frequency domain units within the broader frequency spectrum for low-latency indications. This localized reservation approach ensures that only the necessary portion of resources is dedicated to low-latency traffic, while the majority of frequency resources remain available for other traffic types, maintaining overall resource efficiency.
3Loss of time
If TXOP preemption is implemented for low-latency traffic, then transmission latency is reduced, but transmission stability and interference increase
Solution Approach 1:
The system performs preliminary actions by establishing reserved frequency domain units and indication mechanisms before low-latency traffic arrives. This pre-arranged structure allows for controlled preemption where the AP can interrupt ongoing transmissions in a structured manner, reducing latency while maintaining stability through predefined protocols and procedures.
Solution Approach 2:
The system uses an intermediary mechanism where second STAs send indication information through reserved frequency domain units to the AP. This intermediary approach allows the AP to make informed decisions about preemption, balancing the need for low latency with transmission stability by mediating between ongoing transmissions and urgent low-latency traffic requirements.
Data Source
AI summary
A wireless communication method includes: transmitting, by a second station (STA), first indication information, wherein the first indication information is used to indicate that the second STA comprises low-latency traffic to be transmitted.