Dual Frequency RFID Device Memory Segmentation
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Solution Overview
Problem
The existing dual frequency RFID devices have a low sensitivity UHF interface due to a single non-volatile memory shared by both HF and UHF interfaces, leading to higher power consumption and shorter communication distances for UHF communication.
Innovation Solution
The implementation of a dual frequency RF identification device with separate non-volatile memories for HF and UHF interfaces, allowing limited access to the first memory for initial communication and extended access to the second memory when sufficient power is available, optimizing power management to enable efficient communication with both HF and UHF readers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single non-volatile memory is shared by both HF and UHF interfaces, then the device complexity is reduced and manufacturing is simplified, but the UHF interface sensitivity deteriorates and power consumption increases
Solution Approach 1:
The patent divides the single shared non-volatile memory into two separate non-volatile memories: one dedicated to the HF interface and another dedicated to the UHF interface. This segmentation allows each interface to have its own memory resources, preventing the HF protocol from consuming excessive power that would otherwise affect UHF sensitivity. The separation resolves the contradiction by maintaining simple device structure while improving UHF interface performance through dedicated memory allocation.
2Adaptability or versatility
If the HF protocol accesses a large non-volatile memory, then the HF communication functionality is enhanced, but the power consumption increases and UHF communication distance is reduced
Solution Approach 1:
The patent segments the memory resources by providing a dedicated non-volatile memory for the HF interface, allowing the HF protocol to access large amounts of data without affecting the power consumption of the UHF interface. This segmentation enables full HF communication capability while preventing power hunger from impacting UHF performance.
Solution Approach 2:
The power management unit acts as an intermediary that monitors and controls power distribution to different memory units. It ensures that when the HF protocol accesses large amounts of data in its dedicated memory, the power consumption is isolated and does not propagate to affect the UHF interface sensitivity, thus maintaining both HF versatility and acceptable power levels.
3Productivity
If power is always available to activate all memory resources, then the communication efficiency is maximized, but the power consumption increases and reduces communication distance in low-power scenarios
Solution Approach 1:
The patent implements dynamic power management where the power management unit continuously monitors available power levels and dynamically activates or deactivates memory units based on current power availability. When power is abundant, both HF and UHF memory units are activated for maximum communication efficiency. When power is limited, the system dynamically switches to activate only the necessary memory unit, reducing power consumption and extending communication distance in low-power scenarios.
Solution Approach 2:
The system changes operational parameters by adjusting which memory unit is active based on power conditions. The power management unit detects power levels and changes the state of memory units from active to inactive or vice versa, optimizing the balance between communication efficiency and power consumption according to real-time power availability.
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
This approach enhances the communication distance and efficiency of UHF communication by managing power levels to activate additional memory resources only when necessary, thereby reducing power consumption and improving overall performance.
Implementation Method 1
a power generator (22) providing a power supply to the device
Data Source
Figure 1
Figure 2
AI summary
The dual frequency RF identification device (2) comprises an HF antenna (4) for receiving an HF electromagnetic field, an HF interface (6), an UHF antenna (14) for receiving an UHF electromagnetic field, an UHF interface (16), non-volatile memory means (26) formed by a first non-volatile memory (28) and a second non-volatile memory (30). The first non-volatile memory can be in an active state without the second non-volatile memory being powered and consumes substantially more power than this second non-volatile memory. The first non-volatile memory comprises all data needed for a device configuration allowing this device to carry out at least a communication mode of an UHF protocol, this communication mode having access to the first non-volatile memory but not to the second non-volatile memory. The first non-volatile memory further comprises all attributes needed for a configuration of this communication mode.