Multi-Link Wi-Fi Frame Exchange for Interference-Resilient Links
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Solution Overview
Problem
Wireless communication networks face challenges in maintaining reliable communication links in high interference environments, particularly for devices like drones that experience varying interference levels and asymmetric bandwidths, limiting their range and communication reliability.
Innovation Solution
Implementing multi-link device (MLD) communication links with dual communication paths, utilizing duplicated packets and enhanced frame exchange protocols to enhance reliability and range in high interference scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single communication link is used, then device complexity is low, but communication reliability deteriorates in high interference environments
Solution Approach 1:
The communication link is segmented into multiple independent links (first communication link and second communication link) operating on different frequency bands. Each link can independently transmit packets, allowing the system to achieve high reliability through diversity without requiring complex interference management on a single link.
Solution Approach 2:
Multiple communication links are merged into a unified multi-link device (MLD) architecture that shares a common MAC layer and coordination mechanism. This allows the system to combine the reliability benefits of multiple links while avoiding the full complexity of completely independent systems through shared resource management.
2Reliability
If multi-link device communication is implemented, then communication reliability improves, but device complexity increases
Solution Approach 1:
The MLD architecture implements a universal MAC layer that can operate across multiple frequency bands and links. This multi-functional design allows the same hardware and software components to serve multiple communication purposes, reducing overall system complexity compared to having separate dedicated systems for each link.
Solution Approach 2:
The MLD performs self-coordination and self-management of its multiple links through internal MAC layer protocols. The device autonomously manages packet distribution, link selection, and interference avoidance without requiring external coordination, reducing the complexity burden on network infrastructure.
3Reliability
If backoff protocol is used in interference conditions, then collision avoidance improves, but transmission delay increases
Solution Approach 1:
The system employs periodic backoff intervals on the first communication link during which the second communication link can transmit packets. This periodic structure provides systematic collision avoidance while minimizing overall delay by ensuring that transmission opportunities are regularly available on both links.
Solution Approach 2:
While the first link implements backoff for collision avoidance, the second link continues uninterrupted transmission during the backoff period. This continuity ensures that useful communication action is maintained across the MLD system as a whole, offsetting the delay incurred on the first link.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for providing enhanced frame exchange via multi-link device (MLD) communication links. Some aspects more specifically relate to communicating a first portion of a network traffic connection between MLD enabled Wi-Fi devices via a first communication link between a first MLD on a first network and a first MLD on a second network device. Some aspects also include communicating a second portion of the network traffic connection between the first network device and the second network device via a second communication link between a second MLD on the first network device and a second MLD on the second network device.