Split UMAC Multi-Link Roaming for Reliable WLAN Handover
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Solution Overview
Problem
Existing wireless local area networks (WLANs) face challenges in maintaining reliable and efficient communication as devices move between access points, leading to data interruptions and suboptimal signal quality due to overlapping coverage areas and varying signal strengths.
Innovation Solution
Implementing a distributed multi-link operation (MLO) system that splits the upper medium access controller (UMAC) into an upper UMAC and multiple lower UMACs, establishing simultaneous connections through these UMACs to maintain seamless communication as devices roam, utilizing a split architecture to manage traffic flow and ensure redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single UMAC is used for wireless communication, then the system structure is simple, but data interruptions occur during device movement between access points
Solution Approach 1:
The patent divides the single UMAC into multiple lower UMACs (first lower UMAC, second lower UMAC, etc.) that can operate simultaneously. Each lower UMAC can maintain independent connections to different access points, allowing the system to continue communicating even when one path fails during device movement, thus resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent assigns different lower UMACs to different spatial locations and access points based on local signal conditions. The first lower UMAC connects to a first access point while the second lower UMAC connects to a second access point, allowing each segment to optimize its connection locally while maintaining overall system reliability during device mobility.
2Reliability
If multiple access points are used simultaneously, then signal quality and connectivity are improved, but managing traffic flow becomes complex
Solution Approach 1:
The patent segments the traffic flow management by assigning specific lower UMACs to specific access points. The first lower UMAC handles traffic for the first access point while the second lower UMAC handles traffic for the second access point, simplifying the management complexity through structured separation while maintaining improved connectivity.
Solution Approach 2:
The patent introduces an upper UMAC as an intermediary component that coordinates between multiple lower UMACs and access points. The upper UMAC manages the overall traffic flow coordination and synchronization across multiple lower UMACs, reducing the complexity of direct multi-point management while enabling reliable simultaneous connections.
3Adaptability or versatility
If devices move between access points, then connectivity flexibility is improved, but data interruptions occur
Solution Approach 1:
The patent establishes multiple lower UMAC connections to different access points in advance before the device needs to move. The first lower UMAC and second lower UMAC are pre-configured with alternative access points, so when device movement is detected, the system can switch paths without data interruptions, achieving both mobility adaptability and data reliability.
Solution Approach 2:
The patent creates redundancy by establishing multiple parallel paths through different lower UMACs and access points before any failure or movement occurs. This beforehand cushioning ensures that if one path becomes unavailable during device movement, alternative paths are already in place to maintain continuous data transmission without interruptions.
Data Source
AI summary
Method, system, and/or computer readable medium for providing enhanced diversity and reliability for a continued wireless connection including: establishing an upper upper medium access controller (UMAC) and a plurality of lower UMACs; discovering the upper UMAC by each of the plurality of lower UMACs; connecting a station (STA) actor to each of the plurality of lower UMACs; connecting each of the plurality of lower UMACs to the upper UMAC; and establishing a connection through the upper UMAC and each of the plurality of lower UMACs to the STA actor.