Near Field Communication Active Node Intermediary Design
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Solution Overview
Problem
Existing wireless communication systems face interference and interoperability issues due to the far-field RF spectrum becoming increasingly crowded, and are susceptible to electromagnetic interference (EMI) in urban environments, while near-field magnetic communication systems are limited by their short range and power requirements.
Innovation Solution
Implementing an active node with a high-power near-field generator to create a magnetic field that covers a target communication region, allowing low-power near-field communication nodes to relay and detect information using load modulation or digital modulation schemes, thereby extending communication distance and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If far-field RF communication is used to extend communication range, then communication distance is improved, but radio frequency interference and spectrum congestion increase
Solution Approach 1:
The patent introduces an active node with a near-field generator as an intermediary device. This active node generates a magnetic field that acts as a mediator, enabling low-power near-field communication nodes to relay information over extended distances without directly transmitting far-field RF signals, thus avoiding spectrum congestion and RF interference
Solution Approach 2:
The patent replaces the traditional far-field RF electromagnetic wave transmission mechanism with a near-field magnetic induction mechanism. By using magnetic field coupling instead of radiated RF waves, the system achieves extended communication range through active node relaying while avoiding the harmful effects of far-field RF propagation
2Object-generated harmful factors
If near-field magnetic communication is used to reduce RF interference, then radio frequency interference is reduced, but communication range is limited
Solution Approach 1:
The patent merges multiple low-power near-field communication nodes with an active node that has a near-field generator. By combining the magnetic field generation capability of the active node with the information relay capability of low-power nodes, the system extends communication range while maintaining the low RF interference characteristics of near-field magnetic communication
Solution Approach 2:
The active node serves as an intermediary that bridges the gap between limited near-field range and extended communication needs. It generates the magnetic field that enables low-power nodes to communicate over longer distances indirectly, preserving the low interference benefits while overcoming the range limitation
3Length of moving object
If transmission power is increased to extend communication range, then communication distance is improved, but power consumption increases
Solution Approach 1:
The patent segments the communication function into two parts: an active node that generates the magnetic field (consuming most power) and multiple low-power near-field communication nodes that relay information (consuming minimal power). This segmentation allows extended communication range while keeping the power consumption of individual communication nodes low, improving battery life
Solution Approach 2:
The active node with the near-field generator acts as an intermediary that provides the magnetic field infrastructure, enabling low-power nodes to communicate over extended ranges without needing to generate their own high-power fields, thus reducing their power consumption
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable and secure communication over a larger area with reduced radio frequency interference, improving battery life and signal quality in high-density environments, while maintaining low power consumption for near-field communication devices.
Implementation Method 1
Near field magnetic communication is a form of wireless physical layer communication that transmits information by coupling non-propagating, quasi-static magnetic fields between devices
Implementation Method 2
This magnetic field energy resonates near the communication system, but does not generally radiate into free space
Implementation Method 3
The signal modulation schemes often used in RF communications (amplitude modulation, phase modulation, and frequency modulation) can also be used in near-field magnetic systems
Data Source
AI summary
Systems and methods for communication between near field communication devices within a target communication region using near field magnetic induction is disclosed. One method comprises generating a near field detectable signal at an active node having a power level sufficient to enable communication with a plurality of near field communication nodes located within the target communication region. Information is modulated onto the near field detectable signal using at least one of the near field communication nodes. The modulated information is detected at the active node. The information is then relayed on the near field detectable signal from the active node to at least one of the plurality of near field communication nodes within the target communication region.