Multi-Link WLAN Signaling for Dynamic Auxiliary Link Control
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Solution Overview
Problem
Existing wireless local area network (WLAN) technologies lack efficient methods for managing multi-link associations and activating/deactivating auxiliary links to optimize power consumption and data throughput.
Innovation Solution
Implementing a method for multi-link communication that includes establishing a multi-link association between an access point (AP) and a non-AP device, using signaling to activate or deactivate auxiliary links through an aggregated control (A-Control) field in frames, and managing link configurations such as bandwidth, channel, and frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple links are maintained active in a multi-link association, then data throughput is improved, but power consumption increases due to continuous RF chain activation
Solution Approach 1:
The patent implements dynamic link activation and deactivation based on traffic conditions. The AP MLD can signal the non-AP MLD to activate or deactivate auxiliary links using A-Control fields in frames transmitted over the anchor link. This allows the system to adapt link states to current traffic demands, maintaining high throughput when needed while reducing power consumption during low-activity periods.
Solution Approach 2:
The anchor link serves multiple functions: it carries data traffic and simultaneously transmits control signals for activating/deactivating auxiliary links. The A-Control field structure allows embedding link activation commands within standard frame types (data frames, control frames, management frames), making the control mechanism universal and integrated into the existing protocol framework.
2Use of energy by moving object
If auxiliary links are dynamically activated and deactivated, then power savings are achieved, but link switching delay increases
Solution Approach 1:
The system performs preliminary configuration of auxiliary links during the association setup phase. Link parameters such as bandwidth, channel, and frequency band are pre-negotiated and stored in the A-Control field structures. When activation is needed, the pre-configured parameters can be quickly applied without extensive negotiation, reducing the activation delay while maintaining power savings during inactive periods.
3Device complexity
If signaling for link activation is embedded in A-Control fields, then protocol complexity is reduced, but frame structure flexibility is constrained
Solution Approach 1:
The A-Control field structure is designed to be universal, working with multiple frame types (data frames, control frames, management frames) and supporting both anchor link and auxiliary link operations. The same field structure carries different types of control information depending on the context, reducing the need for separate signaling mechanisms while maintaining adaptability through parameter variations within the unified structure.
Data Source
AI summary
This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for signaling between an access point (AP) multi-link device (MLD) and a non-AP MLD that support multi-link communication in a wireless local area network (WLAN). In some implementations, a multi-link association may include a first link (referred to as an anchor link) and one or more other links (referred to as auxiliary links). The signaling may include control information to activate or deactivate auxiliary links dynamically based on communication load, throughput requirements, or quality of service (QOS). The signaling also may include requests, acknowledgments, or negotiation regarding multi-link connections. Furthermore, signaling and timing information may be used to coordinate when auxiliary links are used for communication or when to promote an auxiliary link to an anchor link.