Multi-link Policy Signaling for EHT Wireless Networks
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Solution Overview
Problem
Current wireless communication standards, such as IEEE 802.11, lack a standardized method for defining and advertising multi-link policies across different wireless links, particularly in multi-band operations, which hinders efficient configuration and compliance in various use cases.
Innovation Solution
A multi-link policy element is introduced, comprising a common policy sub-element applicable to all links and link-specific policy sub-elements for each individual link, allowing dynamic adjustment and advertisement within beacon frames or management frames, enabling unified and flexible multi-link operations across different bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standardized multi-link policy signaling method is introduced, then compliance and configuration efficiency are improved, but device complexity and protocol overhead increase
Solution Approach 1:
The multi-link policy element is segmented into a common policy subelement (applicable to all links) and multiple link-specific policy subelements (each applicable to a specific link). This segmentation allows the protocol to provide comprehensive policy coverage while maintaining manageable complexity through modular structure.
Solution Approach 2:
The common policy subelement provides universal policy settings that apply across all links, eliminating the need to repeat identical policy information for each link. This multi-functionality approach reduces overall protocol overhead while ensuring consistent compliance across the multi-link system.
2Manufacturing precision
If link-specific policy sub-elements are added for each link, then policy precision and control are improved, but message size and transmission overhead increase
Solution Approach 1:
The policy element is divided into common and link-specific portions, allowing precise control where needed (link-specific) while avoiding unnecessary repetition (common). This segmentation achieves policy precision without proportionally increasing message size.
Solution Approach 2:
Link-specific policy subelements provide localized precision only where different policies are needed for individual links, rather than requiring separate full policy definitions for each link. This local quality approach minimizes redundant information while maintaining necessary control precision.
3Adaptability or versatility
If multi-link policy signaling is implemented across all links, then operational flexibility and adaptability are improved, but processing complexity and memory requirements increase
Solution Approach 1:
By segmenting policy information into common and link-specific components, the system achieves operational flexibility across multiple links while simplifying processing through modular data structure. Each link can be configured independently where needed while sharing common policies elsewhere.
Solution Approach 2:
The multi-link policy element is signaled in advance during the association process (in beacon frames, probe response frames, or association response frames), allowing devices to pre-configure their multi-link operations before actual data transmission begins. This preliminary action reduces real-time processing complexity.
Data Source
AI summary
A multi-link access point (AP) device is configured for multi-link operation to communicate with a plurality of non-AP stations (STAs) over a plurality of corresponding links. A multi-link policy element is encoded for transmission to the non-AP STAs to signal a multi-link policy. The multi-link policy element comprises a common policy sub-element and a plurality of link-specific policy sub-elements. The common policy sub-element is applicable to all links. Each of the link-specific policy sub-elements is applicable to a single link. The link-specific policy sub-elements comprise at least a first link-specific policy sub-element applicable to a first link and a second link-specific policy sub-element applicable to a second link. The common policy sub-element defines a link policy for all links that have been set up between the multi-link AP device and the non-AP STAs. Each link-specific policy element defines a link policy specific to an associated link.