Further Insights into the IEEE 802.15.4 Standard
Fernando José da Silva Velez, Luís Miguel Borges, Norberto Barroca, Periklis Chatzimisios · River Publishers eBooks · 2022
This chapter presents the physical and medium access control (MAC) layer specifications for the IEEE 802.15.4 standard. The Carrier sense mechanism is responsible for verifying the frequency channel availability, and reports the sensing to the radio transceiver. The quantized signal energy of each received packet allows for the creation of the received signal strength indicator. The IEEE 802.15.4 MAC sub-layer is designed to support a large number of applications, such as industrial and home applications for control and/or monitoring. In the presence of a beacon-enabled star topology, a network device that wants to send data to the coordinator needs to listen for a beacon. A Non-beacon-enabled network allows every node participating in the network to transmit at any time the channel is found to be idle. In the peer-to-peer mode a device will communicate with other devices in its vicinity while in the star networks the communication exchange will occur between a personal area network coordinator and a network device.