Wireless Frame Preemption for Low-Latency Data Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication technologies struggle to transmit data requiring low latency outside scheduled time periods, necessitating a different technique for prioritized low-latency transmission.
Innovation Solution
A communication device capable of transmitting a wireless frame with a preamble containing information for data preemption, allowing it to interrupt the transmission of certain data and preemptively transmit low-latency data when specific conditions are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If R-TWT technology is used to transmit data in scheduled time periods, then latency is reduced for steady-occurring data, but latency cannot be reduced for data occurring outside scheduled time periods
Solution Approach 1:
The patent implements dynamic preemption capability that allows the system to switch from scheduled transmission mode to interruptive transmission mode when high-priority data arrives. The transmitting device can dynamically decide to preempt ongoing transmissions based on real-time conditions, making the system adaptable to both scheduled and unscheduled data requirements
Solution Approach 2:
The patent embeds preemption information in the preamble of wireless frames in advance, allowing receiving devices to prepare for potential preemption before it occurs. This preliminary action enables the system to handle high-priority data interruptions efficiently without disrupting the overall scheduled transmission framework
2Loss of time
If transmission of first data is interrupted to preemptively transmit second data, then low-latency transmission is achieved for critical data, but transmission of the first data is delayed
Solution Approach 1:
The patent implements a preemption mechanism where the transmitting device can discard the ongoing transmission of first data to recover transmission resources for second high-priority data. The system manages this discarding and recovery process through preemption information in the preamble, allowing reliable handling of both data types through proper resource management
3Adaptability or versatility
If preemption information is embedded in the preamble of wireless frames, then receiving devices can prepare for potential preemption, but the frame structure becomes more complex
Solution Approach 1:
The patent segments the wireless frame into distinct parts: the preamble containing preemption information and the data field containing the actual data. This segmentation allows preemption information to be embedded without significantly increasing overall frame complexity, as the preemption indicators are confined to specific fields in the preamble portion
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A communication device capable of performing wireless communication based on an IEEE 802.11 standard transmits a wireless frame having a preamble of a physical layer (PHY) and a data field containing data. If a specific condition is satisfied when the communication device is transmitting the wireless frame that includes information related to data preemption in the preamble and that contains first data in the data field, the communication device interrupts transmission of the first data and preemptively transmits second data different from the first data.