Multi-link AP Device Link Management for Wireless Reliability
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Solution Overview
Problem
Current WLAN technologies face challenges in maintaining reliability and data throughput, especially in outdoor environments with moving devices and for real-time applications that require low latency and low packet loss, such as online gaming and virtual reality.
Innovation Solution
An access point (AP) device that receives setup information from external AP devices, selects the best link based on available links, buffer status, and STA associations to efficiently transmit data traffic and acknowledgments, enabling multi-link operation for improved network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single link is used for wireless communication, then device complexity is reduced, but network reliability and data throughput deteriorate in high-density and dynamic environments
Solution Approach 1:
The patent divides the wireless communication system into multiple independent links (Link 1, Link 2, etc.) that can operate simultaneously. Each link is managed separately with its own transmission queue, allowing the system to achieve higher reliability through link diversity while maintaining manageable complexity through modular link-level management.
Solution Approach 2:
The patent combines multiple links into a unified multi-link device (MLD) framework that shares a common MAC layer and coordination mechanism. This merging approach allows the system to achieve improved reliability and throughput through link aggregation while avoiding the complexity of completely independent multi-radio architectures.
2Productivity
If multiple links are established for multi-link operation, then data throughput is improved, but link management complexity increases
Solution Approach 1:
The patent performs preliminary link setup and configuration before data transmission begins. The multi-link setup procedure establishes all necessary link parameters, associations, and transmission queues in advance, reducing the complexity of real-time link management during actual data throughput operations.
Solution Approach 2:
The patent introduces a coordination mechanism that acts as an intermediary between multiple links and the MAC layer. This mediator manages link selection, traffic distribution, and acknowledgment routing, simplifying the overall link management complexity while maintaining high data throughput through efficient multi-link coordination.
3Loss of time
If data traffic is transmitted through a single AP link, then transmission protocol is simplified, but latency increases for real-time applications
Solution Approach 1:
The patent implements dynamic link selection and traffic routing that adapts to real-time channel conditions and application requirements. For time-sensitive applications, the system can dynamically switch to or prioritize specific links with better performance, reducing latency while managing protocol complexity through adaptive rather than static configurations.
Solution Approach 2:
The patent applies different transmission protocols and quality parameters to different links based on their specific characteristics and the requirements of the traffic they carry. Time-sensitive applications can be routed through links with optimized low-latency parameters, while other traffic uses standard protocols, reducing overall latency without requiring complete protocol redesign across all links.
4Reliability
If link failover mechanism is implemented, then network reliability is improved, but detection and switching time increases
Solution Approach 1:
The patent pre-configures backup links and establishes transmission queues for alternative paths before failures occur. When a link failure is detected, the system can immediately switch to pre-prepared backup routes, reducing the detection and switching time while maintaining high network reliability through proactive failover preparation.
Solution Approach 2:
The patent maintains continuous monitoring and keeps backup links in a ready state, ensuring that useful communication action can continue without interruption upon failure. The system continuously manages link status and maintains alternative transmission paths active but dormant, enabling instantaneous failover that preserves reliability while minimizing detection and switching time.
Data Source
AI summary
A wireless communication network includes an access point (AP) device and a non-AP device. The AP device receives setup information from one or more external AP devices, including available links and buffered status of external AP devices. The AP devices generates data traffic to be transmitted to a station (STA) affiliated with a non-AP device via a link established between the AP device and the non-AP device. When detecting that the link is not available, the AP device selects one external AP device based on the setup information received from the one or more external AP devices and transfers the data traffic to the selected external AP device.