Synchronized TxOP Scheduling for Low-Overhead Multi-PPDU Wi‑Fi
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing communication efficiency during Transmit Opportunities (TxOPs), particularly in environments with multiple devices and varying communication protocols, leading to inefficiencies and interference.
Innovation Solution
The implementation of Synchronized Transmit Opportunities (S-TxOPs) synchronizes communication across multiple devices, utilizing synchronized communication protocols and mechanisms to enhance data transmission efficiency and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If devices communicate independently during TxOP without synchronization, then each device can operate autonomously, but interference increases and communication efficiency decreases
Solution Approach 1:
The patent implements periodic synchronized transmission opportunities (STxOPs) where multiple devices transmit data in coordinated time intervals. The AP schedules STxOPs at regular intervals, and participating devices align their transmissions to these periodic opportunities, transforming random independent transmissions into organized periodic actions that reduce interference while maintaining high productivity
Solution Approach 2:
The access point performs preliminary scheduling actions by identifying which devices should participate in upcoming STxOPs and notifying them in advance. This preliminary action allows devices to prepare their data buffers and synchronize their transmission timing before the actual data transfer begins, preventing collisions and interference
2Productivity
If multiple devices transmit simultaneously without coordination, then data throughput increases, but collisions and interference occur
Solution Approach 1:
The patent segments the wireless medium access into distinct synchronized transmission opportunities allocated to different device groups. Instead of allowing all devices to transmit simultaneously, the AP divides transmission rights into separate STxOP slots for different device combinations, ensuring that each segment transmits without collision while maintaining overall high throughput through coordinated scheduling
3Adaptability or versatility
If devices use different communication protocols, then system versatility increases, but synchronization becomes difficult and efficiency decreases
Solution Approach 1:
The patent creates a universal synchronized transmission framework that can accommodate multiple communication protocols and device types. The AP acts as a universal coordinator that manages STxOPs for diverse devices regardless of their specific protocols, enabling versatile multi-protocol operation while maintaining synchronized timing and high communication efficiency through the unified STxOP structure
Data Source
AI summary
For example, an apparatus may be configured to cause an Access Point (AP) to transmit a frame over a wireless communication channel, the frame including a field according to a first Physical layer Protocol Data Unit (PPDU) version decodable by a wireless communication (STA) of a first STA type, the field configured to indicate to the STA of the first STA type that the wireless communication channel is to be reserved for a reserved duration; and to communicate a low-overhead PPDU with a STA of a second STA type over the wireless communication channel during a Synchronized Transmit Opportunity (S-TxOP), wherein the S-TxOP is within the reserved duration, wherein the low-overhead PPDU is configured according to a second PPDU version decodable by the STA of the second STA type, the low overhead PPDU including a low-overhead preamble excluding one or more preamble fields of the first PPDU version.