Coexistence Coordinator for WiFi and IoT TDMA Interference
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Solution Overview
Problem
Existing IoT networks face challenges in coexisting multiple communication technologies like WiFi, BLE, RFID, and ZigBee, particularly in the 2.4 GHz band, leading to interference and reduced performance due to overlapping frequency channels.
Innovation Solution
Implementing a coexistence coordinator that uses Time-division multiple access (TDMA) and channel division methods to synchronize WiFi and IoT radio transmissions, allowing WiFi transmissions to be suspended during IoT data transfers and utilizing different frequency channels to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If WiFi and IoT communications operate simultaneously in the 2.4 GHz band, then network coverage is maintained, but interference occurs and performance degrades
Solution Approach 1:
The patent segments the communication resource allocation by dividing time into distinct slots for WiFi and IoT TDMA communications. The access point schedules transmissions in separate time intervals, preventing simultaneous transmissions that cause interference while maintaining both communication types within the same 2.4 GHz band
Solution Approach 2:
The patent implements periodic time-division multiple access (TDMA) slots for IoT device transmissions. IoT devices transmit data in periodic time slots scheduled by the access point, creating a structured rhythm of transmissions that avoids random collisions with WiFi traffic and ensures predictable interference-free periods
2Adaptability or versatility
If multiple communication technologies are integrated in an access point, then functionality is enhanced, but device complexity increases
Solution Approach 1:
The access point is designed with multi-functionality to handle both traditional WiFi communications and IoT TDMA communications through a single device. The system provides universal support for multiple communication protocols and device types, allowing one access point to serve diverse communication needs without requiring separate dedicated hardware for each technology
Solution Approach 2:
The patent introduces a coexistence coordinator as an intermediary component within the access point. This coordinator manages resource allocation, schedules TDMA slots, and coordinates between WiFi and IoT communication streams, simplifying the complexity by providing a centralized control mechanism rather than requiring complex peer-to-peer coordination between multiple communication technologies
3Productivity
If IoT devices transmit data continuously, then data throughput is maximized, but WiFi performance is degraded
Solution Approach 1:
The patent applies partial action by allocating specific time slots for IoT TDMA transmissions rather than continuous transmission. IoT devices transmit data in scheduled intervals rather than continuously, providing sufficient bandwidth for IoT productivity while leaving remaining time slots available for WiFi communications to maintain acceptable WiFi throughput levels
Data Source
AI summary
Systems and methods are provided for implementing a coexistence coordinator in an access point (AP) operating in a Internet of Things (IoT) network. The coexistence coordinator coordinates transmission of both IoT-related data from an IoT radio and WiFi data from a WiFi radio, the IoT radio and the WiFi radio coexisting in the AP. The coexistence coordinator synchronizes time between the WiFi radio and the IoT radio so that times during which IoT-related data is to be sent from the IoT radio (in accordance with Time-Division Multiple Access (TDMA) channel access method) can be determined. Operation of the WiFi radio is suspended during those times when the IoT-related data is transmitted from the IoT radio.