Dual-Link MLD Communication for Low-Latency Time Synchronization
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Solution Overview
Problem
Multi-link communication networks face challenges such as latency, power consumption, and time synchronization issues, particularly in dense environments, with existing technologies failing to effectively manage slow timer issues and hardware faults in APs and STAs.
Innovation Solution
Implementing multi-link devices (MLDs) that combine the functionality of both STAs and APs, enabling them to communicate via dual links on different radio channels, and employing time synchronization correction schemes using beacon frames and traffic steering strategies to optimize link usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple concurrent communication links are established between APs and STAs, then data throughput is improved, but latency and time synchronization issues occur in dense environments
Solution Approach 1:
The patent segments the multi-link communication system into separate functional components: beacon frame transmission for synchronization, traffic steering for load distribution, and power saving mechanisms for energy management. This segmentation allows each component to be optimized independently, reducing overall system latency while maintaining high throughput
Solution Approach 2:
The patent implements preliminary time synchronization through beacon frames before actual data transmission occurs. By pre-synchronizing clocks and establishing timing references in advance, the system prevents timing-related latency during active communication phases
2Reliability
If multiple concurrent communication links are established, then communication capability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic power saving mechanisms where STAs can enter sleep modes between beacon frame intervals. The system periodically wakes to synchronize using beacon frames, then returns to sleep, maintaining communication capability while significantly reducing power consumption during idle periods
Solution Approach 2:
The patent enables STAs to autonomously manage their power states based on traffic conditions and synchronization requirements. Each STA can independently determine when to wake for beacon frames and when to sleep, without requiring continuous power from the AP, thus reducing overall system power consumption
3Measurement precision
If time synchronization correction schemes are implemented using beacon frames, then time synchronization is enhanced, but device complexity increases
Solution Approach 1:
The patent implements feedback-based time synchronization where APs transmit beacon frames containing timing information, and STAs use this feedback to correct their local clocks. The continuous beacon frame transmissions provide ongoing synchronization feedback, maintaining precise time alignment without requiring complex one-time synchronization procedures
Solution Approach 2:
The patent makes beacon frames multi-functional: they serve both as synchronization references and as carriers for timing correction information. This universality eliminates the need for separate synchronization protocols, reducing device complexity while maintaining high synchronization precision
Data Source
AI summary
Systems and methods are provided that relate to multi-link communications between multi-link devices, in which a first link between a station of a first multi-link device and an access point of a second multi-link device and a second link between an access point in the first multi-link device and a station in the second multi-link device can be both established. The first link and the second link are combined for an improved multi-link communication with better performance, such as the reduction of latency, an improved power-saving mechanism and the enhanced time synchronization.