Group Addressed Data Delivery in Multi-Link Wireless Networks
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Solution Overview
Problem
In wireless communication systems, the delivery of group addressed data frames across multiple links can result in duplicate or missing frames, due to differences in target beacon transmission times and the presence of legacy STAs, leading to inefficiencies and data loss.
Innovation Solution
A group addressed data delivery system that ensures a non-AP multi-link logical entity receives group addressed frames in only one link at a time, using shared or non-shared sequence number spaces, and implements mechanisms such as advanced reordering operations and handshakes to manage link changes and avoid duplicates or misses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If group addressed frames are transmitted across multiple links, then data delivery coverage is improved, but duplicate or missing frames occur due to timing differences
Solution Approach 1:
The patent segments the multi-link transmission by designating a specific primary link for group addressed frame transmissions. This segmentation approach divides the multi-link system into a primary transmission path and secondary paths, ensuring that group addressed frames are delivered through a single designated link to prevent duplicates while maintaining multi-link capability for other data types.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a primary link that mediates the transmission of group addressed frames across the multi-link system. This primary link acts as a controlled intermediary that ensures proper timing and sequencing, preventing the duplicate or missing frame issues that arise from uncoordinated multi-link transmissions.
2Productivity
If link changes are allowed to optimize performance, then communication efficiency is improved, but frame delivery reliability deteriorates due to potential misses or duplicates
Solution Approach 1:
The patent applies preliminary action by establishing the primary link designation and transmission protocol before actual group addressed frame transmissions begin. This pre-configuration ensures that when link changes occur for optimization purposes, the fundamental reliability mechanism is already in place, allowing efficiency improvements without compromising frame delivery integrity.
Solution Approach 2:
The patent applies local quality by allowing different transmission characteristics for different links - the primary link maintains strict timing and sequencing controls for reliability, while secondary links can operate with more flexible timing for optimization. This localized differentiation enables both reliability and efficiency goals to be achieved simultaneously.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to group addressed data delivery. A device may determine a plurality of links between one or more access points (APs) in an AP multi-link device (MLD) and one or more logical non-AP stations (STAs) in a non-AP MLD. The device may determine one or more group addressed frames to be sent from the one or more APs of the AP MLD to the one or more non-AP STAs of the non-AP MLD. The device may generate a delivery traffic indication map (DTIM) associated with each link to be used by the one or more non-AP STAs of the non-AP MLD to receive group addressed frames. The device may perform an action based on whether the non-AP MLD sent an indication that a first link of the plurality of links is selected by the non-AP MLD for receiving a first group addressed frame from the one or more group addressed frames.