Packet Traffic Arbitration for Multi-Radio Interference
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Solution Overview
Problem
Multi-radio devices face interference issues due to shared frequency bands, antennas, and physical proximity, which can damage sensitive circuits when multiple radios operate simultaneously, necessitating a mechanism to coordinate radio communication and reduce power consumption.
Innovation Solution
A packet traffic arbitration (PTA) module coordinates radio communication requests between radio subsystems, granting requests based on usage duration and rejecting overlapping requests to prevent interference, allowing subsystems to enter a sleep mode and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radios operate simultaneously in a multi-radio device, then wireless communication functionality is enhanced, but interference between radios occurs and sensitive circuits may be damaged
Solution Approach 1:
The patent introduces a Packet Traffic Arbitration (PTA) module as an intermediary between multiple radio subsystems. This mediator coordinates radio operations by receiving traffic indication messages from different radios, determining which radio should transmit at any given time, and controlling the operation of radio subsystems accordingly. This intermediary mechanism enables multiple radios to coexist without direct interference while maintaining versatile wireless communication functionality.
2Adaptability or versatility
If multiple radios operate simultaneously, then communication capability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by having radios enter sleep mode during periods when they are not granted transmission rights by the PTA module. The PTA module controls radio operations in periodic cycles, activating radios only when needed for transmission and keeping them in low-power sleep mode otherwise. This periodic activation strategy maintains communication capability when required while significantly reducing overall power consumption.
3Object-affected harmful factors
If a PTA module coordinates radio requests with usage duration, then interference is prevented, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling radio subsystems to autonomously monitor PTA decisions and self-regulate their operation states. When the PTA module grants transmission rights with a specific usage duration, the radio subsystem automatically activates and monitors its own transmission timing. When the usage duration expires, the radio subsystem self-deactivates without requiring continuous external control signals. This self-service approach reduces the complexity of the coordination mechanism compared to fully centralized control.
Data Source
AI summary
A multi-radio device includes two or more radio subsystems coupled to a packet traffic arbitration (PTA) module. The PTA module receives a first request for radio communication from a first radio subsystem, where the first request indicates a first usage duration. After granting the first request, the PTA module receives a second request for radio communication from a second radio subsystem. The second request indicates a second usage duration. The PTA module sends a rejection of the second request to the second radio subsystem, where the rejection indicates a remaining time of the first usage duration.