Multi-Link WLAN Setup Using BSS Colors for Interference Control
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Solution Overview
Problem
Existing wireless LAN standards face limitations in supporting high-throughput and efficient communication in high-density environments, particularly with the need for improved transmission rates and reliability across various frequency bands.
Innovation Solution
A wireless communication method and terminal utilizing a multi-link approach, where multiple links are established with distinct BSS colors, shared identifiers, and synchronized operation parameters, enabling efficient channel management and data transmission across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple links operate in the same frequency band with overlapping channels, then channel utilization is improved, but interference between links increases
Solution Approach 1:
The patent segments the wireless communication system into multiple independent links, each with its own channel and BSS color identifier. This allows different links to operate simultaneously in the same frequency band without interfering with each other, as each link is managed separately with distinct BSS colors that prevent cross-link interference.
Solution Approach 2:
The patent applies local quality by assigning different BSS colors to different links, creating distinct identification characteristics for each link. This allows the system to maintain high channel utilization while preventing interference through localized differentiation of link properties.
2Productivity
If links are managed independently with separate control, then channel utilization is optimized, but coordination complexity increases
Solution Approach 1:
The patent merges multiple independently managed links into a unified multi-link device structure that shares common identifiers and operates under coordinated control. This allows independent link management for optimization while reducing overall coordination complexity through shared resources and unified identification mechanisms.
Solution Approach 2:
The patent implements universality by enabling a single multi-link device to manage multiple links with different characteristics (different BSS colors, channels, and frequency bands) using a unified control framework. This multi-functional approach optimizes channel utilization across all links while simplifying coordination through a single device-level management structure.
3Object-affected harmful factors
If BSS colors are assigned to distinguish links, then interference is reduced, but identification overhead increases
Solution Approach 1:
The patent uses BSS colors as identification markers to distinguish between different links, allowing the system to reduce interference by assigning different colors to different links. This color-based identification mechanism provides effective link differentiation with minimal overhead compared to alternative identification methods.
Data Source
AI summary
Disclosed is a station which communicates with an access point (AP) multi-link device using a plurality of links. The AP multi-link device comprises: a transceiver, and a processor. The processor receives, by using the transceiver, a management frame from the AP multi-link device, and obtains, from the management frame, a multi-link setup element including information required for setting the plurality of links. The multi-link setup element includes a common part including information corresponding to all links signaled by the multi-link setup element, and link-specific parts independently including information corresponding to each of the plurality of links signaled by the multi-link setup element.