Wi-Fi Multi-Link Transmission Control for Asymmetric Link Throughput
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Wi-Fi multi-link operations face inefficiencies due to asymmetric links with varying bandwidth, modulation, and interference levels, leading to suboptimal throughput and connection stability.
Innovation Solution
A Wi-Fi device with a link selection module that dynamically adjusts transmission between high and low performance links based on real-time status and predefined quality conditions, using overhearing mechanisms to optimize frame exchange processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional Wi-Fi multi-link operation methods (e.g., EMLSR) are used, then device complexity is reduced, but throughput is not optimized in environments with unbalanced links and low to medium OBSS load
Solution Approach 1:
The patent implements dynamic link selection where the Wi-Fi device continuously monitors link status and adaptively switches between high-performance and low-performance links based on real-time conditions. The link selection module dynamically adjusts transmission configurations by evaluating duration information from PPDU frames and selecting appropriate links, transforming the static multi-link operation into a dynamic system that responds to changing channel conditions and load levels.
2Productivity
If dynamic link selection is implemented to manage asymmetric links, then throughput is enhanced, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The MAC module is segmented into distinct functional components: a receiving circuit for acquiring duration information, a link selection module for decision-making, and transmission circuits for execution. This segmentation allows each component to perform its specific function efficiently, reducing the complexity burden on any single module while collectively managing asymmetric links through coordinated operation.
Solution Approach 2:
The link selection module acts as an intermediary between the receiving circuit and transmission circuits. It receives duration information from the receiving circuit, processes this information to determine optimal transmission strategies, and then controls the appropriate transmission circuit based on current link status. This intermediary structure simplifies the overall control architecture by centralizing the decision-making logic.
3Adaptability or versatility
If transmission on low-performance links is utilized, then link utilization is improved, but transmission latency may increase due to lower link performance
Solution Approach 1:
The patent changes the operational parameters of transmission by selecting different links based on performance requirements. When the high-performance link is available and conditions are favorable, the system uses that link to minimize latency. When the high-performance link is occupied or conditions are poor, the system switches to the low-performance link to maintain utilization. This parameter change strategy allows the system to balance latency and utilization dynamically.
Data Source
AI summary
A Wi-Fi (Wi-Fi) device and a transmission control method are provided. The Wi-Fi device selectively transmits at least a data division of a transmission data on a low performance link based on several parameters. The parameters include a start time point of a backoff procedure of the low performance link, a duration information associated with another Wi-Fi device on a high performance link, and some predefined exception conditions. By overhearing status of another Wi-Fi device on the high performance link, the Wi-Fi device attempts to acquire the duration information. If the duration information can be acquired, the Wi-Fi device calculates a coherent remnant-duration accordingly. Then, the Wi-Fi device determines whether the transmission data should be transmitted immediately on the low performance link, transmitted later on the high performance link, or partially transmitted on the low performance link.