An Update on Short Range Wireless Technology
High Frequency Electronics, California Eastern Laboratories
The IEEE 802.15.4 standard originated in response to the need for robust, low-cost, low-power wireless control networks. Operating in the 868 MHz, 902-928 MHz, and 2.4 GHz ISM radio bands, 802.15.4 defines the fundamental lower levels of these networks: the physical layer (PHY) and media access control (MAC). While these layers manage the RF and data transmission functions, the upper layers—security, networking, and application—must also be defined in order to provide a complete networking solution. A growing number of specification sets have evolved, each of which addresses the unique requirements of a specific group of end users.
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