Multi-Link Setup Restriction for Low-Latency Service Isolation
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Solution Overview
Problem
In wireless communication systems, particularly in the 802.11be standard, there is a challenge in preventing low-latency services on 'clean links' from being interfered by non-low-latency services, as existing methods fail to effectively isolate these services during multi-link communication.
Innovation Solution
The proposed solution involves generating a frame with a supported rates and BSS membership selectors element that indicates a non-AP MLD is disallowed to initiate multi-link setup on a clean link, and using a QoS map element to differentiate between low-latency and non-low-latency services by setting specific DSCP ranges, ensuring only low-latency services are mapped to certain TIDs, thereby preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link setup is allowed on clean links, then link utilization and service diversity are improved, but low-latency service reliability deteriorates due to interference from non-low-latency services
Solution Approach 1:
The patent segments the service types into low-latency services and non-low-latency services, and segments the links into clean links and non-clean links. Clean links are exclusively allocated for low-latency services, while non-clean links can carry both service types. This segmentation prevents interference from non-low-latency services on clean links, ensuring low-latency service reliability while maintaining overall link utilization.
Solution Approach 2:
The patent applies different quality requirements to different links based on their designated purposes. Clean links are configured with strict quality control to carry only low-latency services, while non-clean links have more flexible quality requirements. This local quality differentiation ensures that critical low-latency services receive the necessary reliability guarantees without compromising overall network productivity.
2Adaptability or versatility
If all TIDs are allowed on all links, then service flexibility and link adaptability are improved, but service isolation and quality control worsen
Solution Approach 1:
The patent segments the TID-to-link mapping based on service types. For clean links, only TIDs corresponding to low-latency services are permitted to map, while non-clean links allow TIDs for both low-latency and non-low-latency services. This segmentation maintains service flexibility through TID-to-link mapping while ensuring service isolation by restricting which TIDs can access clean links.
Solution Approach 2:
Different mapping rules are applied to different links according to their specific requirements. Clean links enforce strict mapping rules that allow only low-latency service TIDs, while non-clean links apply more permissive mapping rules. This local quality approach preserves overall service flexibility while achieving necessary service isolation on critical links.
3Reliability
If clean links are established for low-latency services, then service quality and interference prevention are improved, but system complexity and configuration difficulty worsen
Solution Approach 1:
The patent segments the link configuration into clean and non-clean categories, with clear definitions and rules for each type. This segmentation simplifies the configuration process by providing a straightforward classification mechanism, reducing system complexity despite the presence of differentiated service requirements.
Solution Approach 2:
The patent applies quality differentiation locally at the link level rather than requiring complex global configuration. Each link is independently configured as clean or non-clean with corresponding TID mapping rules, which simplifies the overall system complexity by breaking down the configuration into manageable, localized decisions.
Data Source
AI summary
A multi-link communication method is implemented by an access point (AP) multi-link device (MLD). The multi-link communication method includes generating a first frame, and sending the first frame on a first link. The first frame includes a supported rates and a basic service set (BSS) membership selectors element, the element includes first indication information, and the first indication information indicates that a non-AP MLD is disallowed to initiate multi-link setup with the AP MLD on the first link.