Multi-Link Probing Elements for Low-Overhead Wi-Fi Roaming
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in signaling overhead and spectral efficiency during multi-link probing for seamless roaming, particularly when multiple access points are involved, leading to increased frame sizes and reduced network scalability.
Innovation Solution
Implementing a multi-link element format that allows for the efficient transmission and reception of profile information associated with multiple access point multi-link devices (AP MLDs) within a single frame, reducing signaling overhead and enabling more seamless roaming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional profile information requesting methods are used for multiple APs, then profile information can be obtained, but signaling overhead increases and spectral efficiency decreases
Solution Approach 1:
The patent combines multiple profile information requests for different APs into a single probe request frame by introducing a multi-link element that can carry multiple per-AP profile subelements. This merging approach allows a station to request profile information for multiple APs simultaneously without sending separate probe requests for each AP, thereby reducing signaling overhead and improving spectral efficiency.
Solution Approach 2:
The patent segments the profile information structure into hierarchical components: a multi-link element containing multiple per-AP profile subelements, where each subelement contains specific profile information for a particular AP. This segmentation allows efficient packing of multiple profile requests into a single frame while maintaining organized access to individual AP information.
2Loss of information
If multiple separate probe requests are sent for different APs, then profile information for each AP can be requested, but time consumption increases
Solution Approach 1:
The patent merges multiple profile information requests into a single probe request frame using the multi-link element structure. This allows a station to simultaneously request profile information for multiple APs in one communication transaction, significantly reducing the time required compared to sending separate probe requests for each AP sequentially.
Solution Approach 2:
The patent enables preliminary action by allowing the station to request and receive profile information for multiple APs before making a roaming decision. The multi-link element structure allows the AP to provide comprehensive profile information proactively, enabling the station to make more informed roaming decisions faster.
3Adaptability or versatility
If traditional single-link probing is used, then compatibility is maintained, but multi-link roaming capability is limited
Solution Approach 1:
The patent implements universality by designing the multi-link element to serve multiple functions: it can carry profile information for multiple APs, support both single-link and multi-link operations, and maintain compatibility with existing probe request frames while enabling enhanced multi-link roaming capabilities.
Solution Approach 2:
The patent uses a nested structure where the multi-link element contains multiple per-AP profile subelements, and each subelement contains specific profile information for a particular AP. This nesting allows the frame structure to accommodate multiple AP profiles within a single element, enabling multi-link capability without fundamentally redesigning the entire frame format.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for multi-link probing enhancements for more seamless roaming. Some aspects more specifically relate to various formats of multi-link elements via which a non-access point (AP) multi-link device (MLD) may request the profile information associated with multiple AP MLDs and via which an AP MLD (or an AP affiliated with the AP MLD) may provide the requested profile information. In some examples, profile information associated with multiple AP MLDs may be requested or provided, or both, via a single multi-link element in accordance with one or more of the various formats. A non-AP MLD or an AP MLD may use such a single multi-link element to request or provide MLD-level information associated with the multiple AP MLDs or to request or provide link-level information associated with the multiple AP MLDs, or any combination thereof.