Difference between Zigbee and RF

Key Difference: ZigBee is a RF standard that has been specifically designed and developed for low power, low data rate wireless monitoring and control applications present across a large number of distributed nodes. RF stands for Radio Frequency. It refers to a frequency or a band of frequency lying in the range of 10 kilohertz to 300,000 megahertz. These rays are suitable for radio communications and broadcasting.

ZigBee is a specification for a set of wireless protocols that have been designed for data transfer by low power devices. It is based on an IEEE 802.15 standard. ZigBee has been developed by the ZigBee Alliance. This alliance is an open and non-profit association. The protocols of ZigBee are extensively used for producing personal area networks using small and low powered digital radios.

ZigBee based networks were developed as the alternative to Wi-fi and Bluetooth technology. It was required for lower power consumption and for longer battery lives. It is used to create networks that require a low data rate. One of the important features for ZigBee is that it is capable of providing a secure communication with the help of 128-bit cryptographic keys. One of the popular uses of ZigBee is wireless sensor networks using the mesh topology. Mesh topology allows the communication between nodes in both direct and indirect manner. The ZigBee Alliance provides full testing and certification of ZigBee enabled products in order to ensure interoperability.

RFRF stands for Radio Frequency. It refers to a frequency or a band of frequency lying in the range of 10 kilohertz to 300,000 megahertz. These rays are suitable for radio communications and broadcasting. A specific form of the electromagnetic waves is basically used to communicate wirelessly in IEEE 802.11 networks. This particular form of wave is known as a radio frequency wave or an RF wave. Thus, an RF-based system is the one which depends upon the characteristics of electromagnetic wave theory to provide data and voice communication wirelessly.

RF characteristics –

  • Wavelength – it is determined by calculating the distance between two adjacent similar identical points on the wave.
  • Frequency – It is the number of wave cycles that are produced in a given window of time.

Various protocols/standards are developed to make use of Radio frequency like GSM, CDMA, LTE, ZigBee, Bluetooth, etc. It is very difficult to compare Zigbee and RF as ZigBee is a technology that makes use of the radio frequency. It uses the 2.4 GHz radio frequency to deliver a range of dependable and convenient standards anywhere in the world.

Comparison between ZigBee and Bluetooth:

 

ZigBee

RF

Definition

ZigBee is an IEEE 802.15 standards based wireless technology that is mainly used to connect low-power wireless devices in a network. These devices can be used for home automation, industrial automation, etc. and to communicate with other connected devices using ZigBee.

ZigBee makes use of radio frequencies for wireless connectivity.

ZigBee is promoted by its governing body –  ZigBee Alliance, which is an open and not for profit association.

RF is any frequency in the electromagnetic radiation which is used for radio wave propagation. Typically, it is characterized by the rate of oscillation in range of 3 kHz to 300 GHz. Various protocols/standards are developed to make use of Radio frequency, like GSM, CDMA, LTE, ZigBee, Bluetooth, etc.

Name

Devised in the year 1998. Named after the movements of honeybee

Short for Radio Frequency

Categorization

Based on geographic location, the following frequency bands are used by Zigbee:

  • Europe – 868 MHz
  • Australia, USA – 915 MHz
  • Most of other nations – 2.4 GHz

Based on frequency, RF spectrum can be categorized as:

  • Very Low Frequency – 3kHz to 30 kHz
  • Low Frequency – 30 kHz to 300 kHz
  • Medium Frequency – 300 kHz to 3 MHz
  • High Frequency – 3 MHz to 30 MHz
  • Very High Frequency – 30 MHz to 300 MHz
  • Ultra High Frequency – 300 MHz to 3 GHz
  • Super High Frequency – 3 GHz to 30 GHz
  • Extreme High Frequency – 30 GHz to 300 GHz

Applications

ZigBee applications include the following:

  • Home automation
  • Industrial control
  • Energy management
  • Security – intruder warning, fire alert, etc.
  • Wireless sensor networks

Radiofrequency enegy is used in many areas like:

  • Telecommunications
  • Microwave ovens
  • Radar
  • Industrial heaters and sealers
  • Medical uses

 

Application area

Focus on control and automation

Focus on connectivity between laptops, PDAs, etc.

License

License or ZigBee Alliance membership is required for commercial use of ZigBee. However, ZigBee specification is free to use for

non-commercial purposes.

License – Various standards/ protocols may deploy their own licensing regime. E.g. GSM is open market, while CDMA and ZigBee are license based standards.

Image Courtesy: e-smartsys.com, glendalewaterandpower.com

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