Wireless Frame Preemption for Bursty Low-Latency Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication technologies struggle to efficiently transmit non-periodic low-latency services due to the lack of a resource preemption mechanism for bursty low-latency services, which are not supported by the restricted target wake time mechanism designed for periodic services.
Innovation Solution
A wireless frame transmission method that includes determining a lifetime parameter for non-low-latency service data, where the parameter can be a preset lifetime or a sum of the preset lifetime and transmission duration of low-latency service data, allowing resource preemption to transmit low-latency services between media access control service data units of non-low-latency service data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the restricted target wake time (rTWT) mechanism is used to reserve resources for periodic low-latency services, then latency is reduced for periodic services, but non-periodic low-latency services cannot be transmitted efficiently
Solution Approach 1:
The patent introduces a dynamic resource preemption mechanism that allows the system to adapt between periodic and non-periodic low-latency service transmission modes. The rTWT mechanism provides reserved resources for periodic services, while the preemption mechanism dynamically allocates these resources when non-periodic services require immediate transmission, enabling the system to switch between different operational states based on service requirements.
Solution Approach 2:
The patent changes the resource allocation parameters by introducing a preemption indicator field in the MAC header and modifying the lifetime parameter structure. These parameter changes enable the system to differentiate between periodic and non-periodic service requirements, allowing resource preemption for non-periodic services while maintaining reserved resources for periodic services through parameter-based control.
2Productivity
If resources are preempted to transmit low-latency service data, then transmission efficiency for non-periodic services is improved, but the integrity of non-low-latency services may be compromised
Solution Approach 1:
The patent applies preliminary action by pre-calculating and setting the lifetime parameter to include both the preset lifetime of non-low-latency data and the transmission duration of low-latency service data. This preliminary configuration ensures that the non-low-latency service data remains valid and can be retransmitted if preempted, maintaining data integrity while allowing efficient preemption for urgent low-latency services.
Solution Approach 2:
The patent provides beforehand cushioning by extending the lifetime parameter to cover the potential transmission duration of low-latency services. This creates a buffer that protects non-low-latency service data from becoming invalid due to preemption, ensuring that even if transmission is interrupted, the data remains recoverable and the service integrity is maintained.
3Device complexity
If the lifetime parameter includes only the preset lifetime of non-low-latency service data, then the parameter structure is simple, but it cannot accommodate the transmission duration of low-latency service data
Solution Approach 1:
The patent merges two time parameters - the preset lifetime of non-low-latency service data and the transmission duration of low-latency service data - into a unified lifetime parameter. This combination allows the single parameter to simultaneously represent both the validity period of non-low-latency data and the expected duration of low-latency transmission, providing adaptability without significantly increasing structural complexity.
Data Source
AI summary
A wireless frame transmission method is performed by a transmitter. The method includes: transmitting a wireless frame that includes non-low-latency service data and low-latency service data; where the low-latency service data is transmitted between two media access control service data units (MSDUs) of an aggregation of MSDUs (A-MSDU) of the non-low-latency service data; a lifetime parameter of the A-MSDU includes: a first parameter or a second parameter; the first parameter includes a preset lifetime of the non-low-latency service data; and the second parameter includes a sum of the preset lifetime and a transmission duration of the low-latency service data.