Multi-Link Wi-Fi Frame Signaling for TID Remapping After AP Switch

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Solution Overview

Problem

The challenge in multi-link Wi-Fi scenarios is the implementation failure of Traffic Identifier-to-Link (TID-to-Link) mapping when affiliated Access Point (AP) changes, leading to communication disruptions.

Innovation Solution

A communication method and apparatus that utilize a target radio frame with a first identification bit to map a target traffic identifier (TID) to a new link corresponding to a new affiliated AP, enabling seamless TID-to-Link mapping and communication between Non-AP and AP Multi-Link Devices (MLD).

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the affiliated AP changes in multi-link scenario, then the system can adapt to new communication conditions, but the TID-to-Link mapping mechanism fails to implement

Engineering Contradiction:

Improveadaptability to new affiliated APVSAvoidTID-to-Link mapping implementation

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-defining the TID-to-Link mapping mechanism and establishing mapping rules before the affiliated AP changes occur. The Non-AP MLD prepares mapping information and sends it to the AP MLD in advance, ensuring that when the AP changes, the mapping mechanism is already in place and can immediately handle the new configuration without implementation failure.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by having the Non-AP MLD send TID-to-Link mapping information to the AP MLD, and the AP MLD uses this feedback to update its mapping table. This closed-loop feedback mechanism ensures that both devices maintain consistent mapping information even when affiliated APs change, resolving the reliability issue.

Inventive Principle:

Principle #23Feedback

2Productivity

If multiple frequency bands are aggregated and collaborated, then transmission capacity increases, but system complexity increases

Engineering Contradiction:

Improvetransmission capacityVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the multi-band aggregation system into independent TID-to-Link mapping tables for each frequency band (2.4 GHz, 5.8 GHz, 6 GHz). Each band maintains its own mapping relationships, allowing the system to handle multiple frequency bands simultaneously without creating unmanageable complexity. The segmentation enables independent management of each band's traffic identifiers and links.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces another dimension by adding the TID-to-Link mapping layer above the physical frequency band layer. This creates a two-dimensional structure where traffic identifiers are mapped to specific links within each frequency band, providing an additional organizational dimension that simplifies the management of multi-band aggregation without directly increasing operational complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20260006536A1Communication method and apparatus, electronic device, and storage medium

Publication Date: 2026.01.01 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A communication method is applied to a non-access-point multi-link device (Non-AP MLD) and includes: determining a target radio frame, where the target radio frame includes a first identification bit, and the first identification bit indicates that a target traffic identifier (TID) is mapped to a new link corresponding to a new affiliated AP of an access point multi-link device (AP MLD); and sending the target radio frame.