Multi-Link PPDU Signaling for Lower Overhead Wi‑Fi Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication standards, such as IEEE 802.11ax, face challenges in supporting high throughput and data rates required by emerging technologies like the extreme high throughput (EHT) standard, particularly in managing multi-link operations and efficient information exchange across multiple links.
Innovation Solution
The proposed solution involves a multi-link device (MLD) that operates across multiple links, enabling the transmission and reception of information on different links using enhanced PHY layer protocols, hybrid automatic repeat request (HARQ) schemes, and wide bandwidths, with specific mechanisms for link setup and management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If element information for multiple links is included in a single PPDU, then overhead reduction is achieved, but processing complexity increases
Solution Approach 1:
The element information for multiple links is segmented into separate information fields within the PPDU. Each information field corresponds to a specific link and contains link-specific parameters. This segmentation allows the receiver to process each link's information independently, reducing processing complexity while maintaining overhead reduction benefits.
Solution Approach 2:
A link identification field acts as an intermediary that associates each element information field with its corresponding link. This intermediary structure enables the receiver to efficiently route and process element information for different links without confusion, managing the complexity of multi-link information while keeping the overall PPDU structure organized and manageable.
2Device complexity
If element information for multiple links is transmitted separately, then processing complexity is reduced, but overhead increases
Solution Approach 1:
Multiple element information fields for different links are merged into a single PPDU structure. Instead of transmitting separate PPDU frames for each link, the patent combines all necessary element information for multiple links into one consolidated PPDU, reducing the total number of transmissions and overhead while maintaining manageable processing through structured organization.
3Loss of information
If complete element information for all links is included in every PPDU, then information completeness is improved, but transmission efficiency decreases
Solution Approach 1:
The patent extracts only the necessary element information for specific links into separate information fields within the PPDU, rather than including complete element information for all links in every transmission. This selective extraction maintains information completeness for the relevant links while improving transmission efficiency by reducing redundant data.
Solution Approach 2:
Instead of transmitting complete element information for all possible links in every PPDU, the patent uses partial action by including only the element information fields for the specific links that are currently active or relevant. This partial inclusion strategy maintains necessary information completeness while significantly improving transmission efficiency.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
According to various embodiments, a multi-link device (MLD) operating in a plurality of links can receive a PPDU through a first link from among the plurality of links. The PPU can include a first information field related to a second link that is differentiated from the first link. The first information field related to a second link can include a second information field related to a link identifier of a second link and a third information field related to whether all pieces of element information related to a second link is included in the PPDU.