WiFi-Cellular Spectrum Coexistence With Adaptive Power and MCS

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Solution Overview

Problem

Existing communication systems face challenges in ensuring fair coexistence between wireless fidelity (WiFi) and cellular networks, particularly in spectrum sharing scenarios, leading to interference and security vulnerabilities due to differing Clear Channel Assessment (CCA) mechanisms and lack of secure authentication protocols.

Innovation Solution

A system and methodology that includes a Wi5G module to adjust cellular device parameters like MCS and transmission power based on WiFi presence, and a ticketing system with a Zero Trust engine for secure authentication and dynamic security policies to manage spectrum access, ensuring fair coexistence and security in shared networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If cellular devices transmit at high power to ensure coverage, then transmission range is improved, but interference with WiFi devices increases

Engineering Contradiction:

Improvetransmission rangeVSAvoidinterference with WiFi

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adjusts cellular device transmission power based on real-time detection of WiFi devices in the vicinity. When WiFi devices are detected, the cellular device reduces its transmission power to minimize interference, while maintaining adequate power when only cellular devices are present to ensure optimal coverage and range.

Inventive Principle:

Principle #15Dynamics

2Productivity

If cellular devices use high modulation and coding schemes to increase data rate, then throughput is improved, but susceptibility to interference increases

Engineering Contradiction:

Improvedata rateVSAvoidinterference susceptibility

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adjusts the modulation and coding scheme (MCS) of cellular devices based on the detected presence of WiFi devices. When WiFi devices are detected, the system selects more robust, lower-order modulation schemes that are less susceptible to interference, while using higher-order modulation schemes when only cellular devices are present to maximize data rate.

Inventive Principle:

Principle #15Dynamics

3Productivity

If spectrum sharing is enabled between WiFi and cellular networks, then network capacity is improved, but security vulnerabilities increase

Engineering Contradiction:

Improvenetwork capacityVSAvoidsecurity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system introduces a Wi5G module as an intermediary component that detects the presence of WiFi devices and mediates between WiFi and cellular devices. This module enables spectrum sharing to increase network capacity while simultaneously managing security by controlling which devices can access the spectrum based on their authentication status and the detected environment.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements a feedback mechanism where the Wi5G module continuously monitors the spectrum environment for WiFi devices and provides this information to cellular devices. Based on this feedback, cellular devices adjust their transmission parameters, creating a closed-loop system that maintains security while enabling spectrum sharing to improve network capacity.

Inventive Principle:

Principle #23Feedback

4Adaptability or versatility

If Clear Channel Assessment mechanisms differ between WiFi and cellular, then each network optimizes its access, but coexistence fairness deteriorates

Engineering Contradiction:

Improvenetwork optimizationVSAvoidcoexistence fairness

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system changes the operational parameters of cellular devices based on the detected presence of WiFi devices. When WiFi devices are detected, cellular devices adjust their transmission power and modulation schemes to levels that ensure fair coexistence, while maintaining the ability to optimize performance when only cellular devices are present through parameter adaptation.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12556913B2System and methodology for secure coexistence between wireless fidelity and cellular networks

Publication Date: 2026.02.17 ANDRO COMPUTATIONAL SOLUTIONS LLC

AI summary

Embodiments of the disclosure provide a system and methodology for secure coexistence between wireless fidelity and cellular networks. Methods include: determining whether a wireless fidelity (WiFi) device is sharing a spectrum of a network; and adjusting a parameter of a cellular device sharing the spectrum in response to determining that the WiFi device is sharing the spectrum, wherein the parameter includes a modulation and coding scheme or a transmission power of the cellular device. Methods further include controlling admission of users to a communications network, including: determining whether an incoming transmission is an authentication request from a new user; issuing a temporary authentication to the user to transmit a set of access requirements to the user; determining whether a reply from the user complies with the set of access requirements; and issuing a long-term authentication to the user in response to the reply complying with the set of access requirements.