Mục lục bài viết (5)
- What is the RFID frequency 918.4–923 MHz and why was it chosen in Vietnam?
- Why is the 918.4–923 MHz band important for warehouse goods location?
- What specific compliance regulations apply to RFID devices in Vietnam?
- How to select compliant UHF RFID devices for a warehouse goods location system?
- Summary table: Key concepts about UHF RFID in Vietnam
The RFID frequency 918.4–923 MHz is the only compliant band for UHF devices in Vietnam, as regulated by Circular 08/2021/TT-BTTTT. This band allows UHF RFID systems to operate legally, delivering superior read performance for warehouse goods location and organization applications. This article explains the regulations in detail, their impact on performance, and the factors to consider when deploying.
The RFID frequency 918.4–923 MHz is the only compliant band for UHF devices in Vietnam under Circular 08/2021/TT-BTTTT. This band enables RFID tag reading in warehouses with high accuracy, with a maximum transmit power of 500 mW ERP. Imported or domestically manufactured devices must comply with this regulation to be legally circulated and used.
Table of Contents
- What is the RFID frequency 918.4–923 MHz and why was it chosen in Vietnam?
- Why is the 918.4–923 MHz band important for warehouse goods location?
- What specific compliance regulations apply to RFID devices in Vietnam?
- How to select compliant UHF RFID devices for a warehouse goods location system?
- Summary table: Key concepts about UHF RFID in Vietnam
- Common mistakes when deploying RFID for warehouse goods location
- Why choose Việt POS for warehouse goods location RFID solutions?
- FAQ
What is the RFID frequency 918.4–923 MHz and why was it chosen in Vietnam?
The RFID frequency 918.4–923 MHz belongs to the UHF (Ultra High Frequency) band, licensed by Vietnam for RFID applications under Circular 08/2021/TT-BTTTT. This band allows tag reading at longer distances (3-10 meters) compared to lower frequency bands, making it suitable for warehouse management, inventory, and goods location applications.
The choice of the 918.4–923 MHz band is not arbitrary. It is part of the global UHF band (860-960 MHz) allocated by the ITU for RFID applications, but each country has its own regulations. Vietnam selected the 918.4–923 MHz band to avoid conflicts with existing telecommunications services and to ensure compatibility with equipment imported from major markets.
Key point: imported UHF RFID devices must be adjusted to operate within this frequency band. If not, the device may cause interference or may not be legally permitted for use in Vietnam.
Why is the 918.4–923 MHz band important for warehouse goods location?
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Why is the 918.4–923 MHz band important for warehouse goods location?
The 918.4–923 MHz band allows RFID systems to read tags at distances of 3-10 meters, sufficient to cover large warehouse areas such as doorways, aisles, and high-level racks. This enables real-time tracking of goods locations, reduces search time, and increases accuracy in warehouse management.
In a warehouse environment, accurately determining goods locations is a critical challenge. With UHF RFID, each pallet and each carton is tagged with a unique identifier. When a forklift passes through a reading portal, the system automatically records the new location without manual intervention.
Specific benefits:
- Reduce goods search time in the warehouse by 60-80%
- Inventory accuracy exceeding 99%
- Real-time goods location updates
- Minimize errors during goods receiving and shipping
- Support efficient FEFO/FIFO processes
What specific compliance regulations apply to RFID devices in Vietnam?
UHF RFID devices operating in Vietnam must comply with Circular 08/2021/TT-BTTTT, with a frequency band of 918.4–923 MHz and a maximum transmit power of 500 mW ERP. Devices must be certified as compliant before being circulated, including checks on frequency, power, and electromagnetic compatibility.
The compliance process includes the following steps:
- Test device samples at a laboratory designated by the Ministry of Information and Communications
- Evaluate technical parameters: operating frequency, transmit power, bandwidth
- Issue a certificate of conformity
- Affix the conformity mark (CR mark) on the device
Note: UHF RFID devices imported from abroad typically have a wider frequency range (860-960 MHz). Importers must ensure the device is configured to operate within the 918.4–923 MHz band before use in Vietnam.
How to select compliant UHF RFID devices for a warehouse goods location system?
How to select compliant UHF RFID devices for a warehouse goods location system?
When selecting UHF RFID devices for a warehouse, check: the operating frequency band (918.4–923 MHz), transmit power (≤500 mW ERP), certificate of conformity, resistance to metal and liquid interference, and the ability to integrate with existing WMS systems.
Detailed selection criteria:
- Frequency band: the device must fully support the 918.4–923 MHz band, not just a portion
- Power: ensure transmit power ≤500 mW ERP to meet regulations
- Certification: require the supplier to present the certificate of conformity
- Interference resistance: RFID tags must perform well on metal and liquids
- Compatibility: readers must be compatible with common RFID tag types such as EPC Gen2
Summary table: Key concepts about UHF RFID in Vietnam
Summary table: Key concepts about UHF RFID in Vietnam Term Definition Practical example UHF RFID Identification technology using ultra-high frequency radio waves (860-960 MHz) Reading tags on pallets from a distance of 3-10
| Term | Definition | Practical example |
|---|---|---|
| UHF RFID | Identification technology using ultra-high frequency radio waves (860-960 MHz) | Reading tags on pallets from a distance of 3-10 meters |
| 918.4–923 MHz band | Compliant frequency band for UHF RFID in Vietnam under Circular 08/2021/TT-BTTTT | RFID reader |
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