Time Domain Preemption in Wireless Frames
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Solution Overview
Problem
Existing wireless communication systems lack efficient mechanisms for time domain preemption, which is essential for allowing urgent traffic to be sent by stopping ongoing transmissions.
Innovation Solution
A time domain preemption system that pauses, stops, or restarts a Physical Layer Convergence Protocol Data Unit (PPDU) to enable urgent traffic transmission, using techniques such as inserting pauses or delimiters in the PPDU frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time domain preemption is implemented to allow urgent traffic transmission, then the responsiveness and reliability for urgent traffic are improved, but the system complexity and frame structure complexity increase
Solution Approach 1:
The PPDU frame structure is segmented into multiple data portions (first data portion, second data portion, etc.) separated by delimiters. This segmentation enables the transmitter to pause transmission at delimiter boundaries and allows receivers to process data in discrete units, facilitating time domain preemption without requiring complex mid-frame interruption mechanisms.
Solution Approach 2:
Delimiters are introduced as intermediary elements between data portions. These delimiters serve as predefined pause points that simplify the preemption mechanism by providing natural breakpoints in the transmission stream, eliminating the need for complex signaling or mid-data interruption handling.
2Speed
If pauses are inserted in PPDU frames to enable preemption, then urgent traffic can be transmitted promptly, but the transmission duration and time loss increase
Solution Approach 1:
The frame structure incorporates periodic delimiters at predetermined intervals between data portions. These periodic pause points enable urgent traffic to preempt transmission without requiring continuous monitoring or arbitrary interruptions, as the system is already designed to pause at regular intervals anyway.
Solution Approach 2:
Delimiter positions are predetermined and built into the frame structure in advance. By pre-planning where pauses will occur in the transmission stream, the system eliminates the need for dynamic decision-making during transmission, reducing processing overhead and enabling faster preemption responses.
3Adaptability or versatility
If the data payload is divided into multiple data portions with delimiters, then time domain preemption becomes feasible, but the frame overhead and processing complexity increase
Solution Approach 1:
The data payload is divided into multiple data portions separated by delimiters, creating a modular frame structure. Each data portion can be independently processed and transmitted, allowing receivers to handle data in discrete units and enabling preemption at segment boundaries without requiring complex partial-frame processing.
Solution Approach 2:
The use of consistent delimiter structures between different data portions creates a homogeneous and predictable frame format. This uniformity simplifies receiver processing by establishing regular patterns that can be efficiently parsed, reducing the complexity compared to irregular or variable-length interruption points.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to time domain preemption. A device may generate a frame comprising a preamble and a data payload. The device may divide the data payload into a plurality of data portions. The device may insert a time domain gap between each of the plurality of data portions to allow for preemption during transmission of the frame. The device may cause to send the frame to a first station device.