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Wireless-Network-Slide14

There are two basic types of devices that can be present in an 802.15.4 network; RFD and FFD. An RFD, also referred to as an end-device, contains a limited set of 802.15.4 features. The main characteristics of an RFD are that it can only communicate to a single FFD in the network and no RFDs. It also requires little memory, processing and power resources for operation. Usually such reduced networking functionality is sufficient for sensor and actuator nodes. An FFD device contains the full set of IEEE 802.15.4 features and hence FFD is capable to act as a network coordinator and as an end-device. It can communicate both to FFDs and RFDs but requires extra memory and processing power. It consumes more energy than an RFD. A network device must be FFD if it is to act as network coordinator or if it requires data packet forwarding capability.

PTM Published on: 2012-04-03