Beacon TSF Integrity Protection Using MIC Extension Fields

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Solution Overview

Problem

Timing synchronization function (TSF) fields in wireless communication are not adequately protected by message integrity checks (MICs), leading to potential security vulnerabilities in wireless local area networks (WLANs).

Innovation Solution

Incorporating a message integrity check (MIC) value generated using the TSF field into a beacon extension frame or an information element (IE) of a beacon frame, such as a vendor-specific (VS) IE, to protect the TSF field, which may also have a different periodicity than the beacon frame.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the TSF field is not protected by MIC, then the device complexity and processing overhead are reduced, but the security and reliability of wireless communications deteriorate

Engineering Contradiction:

Improvesecurity of TSF fieldVSAvoidcomplexity of security processing

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the security protection approach by applying MIC protection selectively to specific fields (TSF, beacon interval, capability information) while leaving other fields unprotected. This allows the system to protect critical timing and synchronization information without requiring MIC protection for the entire beacon frame, thereby balancing security needs with processing complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary security measures by pre-calculating and including MIC values for the TSF field and other critical parameters within the beacon frame structure. This preliminary protection is built into the beacon transmission process, allowing receiving devices to verify integrity without adding complex real-time security processing.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If MIC protection is applied to TSF field, then the integrity and authenticity of timing synchronization are improved, but the processing time and energy consumption increase

Engineering Contradiction:

Improveintegrity of TSF fieldVSAvoidprocessing time for security checks

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent divides the beacon frame into protected and unprotected segments, applying MIC protection only to the TSF field and other essential parameters. This segmentation allows receiving devices to perform security verification on only the critical portions of the beacon frame, reducing the overall processing time and energy consumption compared to protecting the entire frame.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies partial security action by implementing MIC protection for only the most critical fields (TSF, beacon interval, capability information) rather than providing excessive protection for all fields. This partial approach ensures adequate security for timing synchronization while minimizing the processing overhead associated with security verification.

Inventive Principle:

Principle #16Partial or excessive action

3Object-affected harmful factors

If the TSF field is protected with MIC, then the resistance to unauthorized access is improved, but the ease of operation and implementation deteriorate

Engineering Contradiction:

Improveresistance to unauthorized accessVSAvoidease of implementing security protection

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent implements segmented protection where the TSF field and other critical parameters are identified and protected with MIC, while other fields remain unprotected. This segmentation provides resistance to unauthorized access for critical timing information without requiring complete security implementation across all fields, thus maintaining ease of operation for non-critical functions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by providing differential security treatment to different fields within the beacon frame. The TSF field receives high-level security protection through MIC, while other fields have varying or no protection. This local quality approach ensures strong protection where needed (TSF for timing synchronization) while maintaining operational simplicity elsewhere.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12634698B2Protecting timing synchronization function values with security parameters

Publication Date: 2026.05.19 QUALCOMM INC

AI summary

This disclosure provides methods, components, devices and systems for protecting timing synchronization function (TSF) values with message integrity checks (MICs). Various aspects relate generally to methods for a wireless device to protect the TSF field using an MIC. Some aspects more specifically relate to methods for the wireless device to include a MIC value generated using a TSF field of a beacon frame in a beacon extension frame. Some aspects more specifically relate to methods for the wireless device to include the MIC value generated using the TSF field in an information element (IE) of a beacon frame. In some examples, a vendor-specific (VS) IE or another IE. In some examples, the associated TSF field may be a TSF field of the beacon frame or of a recurring time epoch, such as a target beacon transmission time (TBTT) of the beacon frame.