WLAN STA Grouping for Low-Latency TXOP Contention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing EDCA mechanism in wireless local area networks (WLANs) is inefficient in scenarios with a large number of stations (STAs), leading to low probabilities of acquiring a transmission opportunity (TXOP) and resulting in significant latency and latency jitter for both uplink (UL) and downlink (DL) data transmission.
Innovation Solution
Introduce an STA grouping function in channel contention to enhance the EDCA mechanism, allowing for more efficient assignment of TXOPs and increased frequency of multi-user uplink (MU UL) transmissions, thereby reducing latency and jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the existing EDCA mechanism is used in WLANs with a large number of STAs, then the channel access mechanism is simple to implement, but the probability of acquiring TXOP is low and latency is high
Solution Approach 1:
The patent segments STAs into different groups based on their service types and QoS requirements. Each group is assigned specific contention parameters and TXOP opportunities, allowing simultaneous channel access for multiple groups. This segmentation increases individual TXOP acquisition probability while maintaining overall system efficiency, directly resolving the contradiction between simple implementation and high productivity.
2Productivity
If the existing EDCA mechanism is used, then the system is easy to operate, but latency jitter is significant
Solution Approach 1:
The patent applies local quality by assigning different contention parameters (CWmin, CWmax, AIFS, TXOP limit) to different STA groups based on their specific QoS requirements. Latency-sensitive traffic receives more favorable parameters, ensuring stable and predictable latency performance for critical applications while maintaining overall system productivity.
Solution Approach 2:
The patent performs preliminary classification of STAs into groups before channel contention based on their service types and QoS requirements. This preliminary action allows the system to pre-assign appropriate contention parameters and predict TXOP acquisition patterns, thereby reducing latency jitter before transmission actually occurs.
3Productivity
If STA grouping function is introduced for efficient TXOP assignment, then TXOP assignment efficiency and MU UL transmission frequency increase, but device complexity increases
Solution Approach 1:
The patent implements a universal grouping mechanism that can accommodate different service types and QoS requirements through a single standardized framework. The grouping function serves multiple purposes: TXOP assignment, parameter configuration, and QoS management, thereby increasing productivity without proportionally increasing device complexity.
Data Source
Figure 1~2
Figure 3~4
Figure 5~8
AI summary
Provided are methods for wireless communication, a station (STA), and an access point (AP), which relate to the field of communications. The method is performed by a station (STA) having uplink (UL) data to be transmitted, and includes: transmitting (S210) a first medium access control (MAC) frame, wherein the first MAC frame is configured for channel contention, and a channel contention result corresponding to the first MAC frame is associated with grouping information of the STA.