• 868.0–868.6 MHz: allows one communication channel
• 902–928 MHz: up to ten channels expanded to thirty
• 2400–2483.5 MHz: used worldwide up to sixteen channels
MAC layer
The medium access control layer(MAC) allows the channeling of MAC frames by the use of Physical channel. Apart from this it also provides administration interface and itself controls the access to the physical layer. Also it assures time slots, controls frame substantiation and node alliance. Last but not the least it provides hook prints for security services. IEEE802.15.4 does not exchanges standard Ethernet frames.
Higher layer
The higher level layers and the sublayers associated with these are not defined by the standard. Zigbee is one of the example that is defined by the standard. ROIT, Unison, contiki and ROTS are some OS that are used in some hardware devices of IEEE 802.15.4.
The protocol architecture of IEEE 802.15.4. Every network is formed by a group of devices that are separated by a suitable distance. Now there are two ways in which a network can be built a network. The first is point to point network in which there is a group of system which …show more content…
There are standards and protocols available ranging from simple to highly complex. Zigbee is the most advanced standard of 802.15.4. Bluetooth and wi-fi are the most widely used now a days. Bluetooth is now available on almost all devices such as wireless speakers, hands free connection and cell- phone connections.the new low energy are findind many applications in the field of medical and sports. On the other side is the wi-fi which is the high speed inthernet in simple words and is used by laptops, smart phones and tablets. The newer faster versions are used in televion set for video transfer. The low power versions are also available now a