Low Latency Frame Notification via Preemption Allowance
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low latency data transmission due to issues like explicit preemption release signaling, preemption allowance indication, preemption on Enhanced Multi-Link Single-Radio links, and hidden node problems, which hinder efficient data transmission and reception.
Innovation Solution
The implementation of a method where a wireless device receives a frame indicating preemption allowance for low latency indication frame transmission, allowing it to pause or resume data transmission within a transmit opportunity (TXOP), using a Low Latency Indication Allowance (LIA) bit in the physical layer header or media access control (MAC) control information, and managing preemption through frame exchanges and timeouts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit preemption release signaling is used, then preemption control is achieved, but signaling overhead increases and latency increases
Solution Approach 1:
The patent extracts the preemption control function from complex explicit signaling and implements it through a simple bit flag (preemption indication bit) in the PHY header. This extraction reduces signaling overhead while maintaining preemption control capability.
Solution Approach 2:
The patent uses a simple, lightweight bit flag instead of complex signaling messages. This disposable-like approach uses minimal resources (just one bit) to achieve the same control function, reducing overhead and complexity.
2Speed
If preemption allowance indication is implemented, then low latency transmission is enabled, but device complexity increases
Solution Approach 1:
The patent applies local quality by adding a specific bit flag (preemption indication bit) at a specific location (PHY header) rather than changing the entire frame structure. This localized modification enables low latency transmission without increasing overall device complexity.
Solution Approach 2:
The patent makes the PHY header multi-functional by using the preemption indication bit to serve multiple purposes: indicating preemption allowance, enabling low latency transmission, and maintaining backward compatibility. This universal approach avoids complexity increases.
3Productivity
If preemption is allowed on Enhanced Multi-Link Single-Radio links, then transmission efficiency improves, but hidden node problems increase
Solution Approach 1:
The patent implements feedback mechanisms where the receiving device sends acknowledgment frames that include preemption indication bits. This feedback loop allows the transmitting device to adjust its transmission strategy, preventing hidden node problems while maintaining transmission efficiency.
Solution Approach 2:
The patent uses preliminary action by having devices indicate their preemption allowance status in advance through the PHY header bits. This提前 indication allows other devices to prepare for potential preemption events, reducing the impact of hidden node problems.
Data Source
AI summary
Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a wireless transceiver configured to communicate within a transmit opportunity (TXOP), where the wireless transceiver is further configured to receive a frame indicating a preemption allowance for low latency indication frame transmission from a second wireless device, and a controller configured to control the wireless transceiver to pause or resume data transmission within the TXOP in response to the frame indicating the preemption allowance for low latency indication frame transmission from the second wireless device.