METHODS OF INCREASING THE PRODUCTIVITY OF DEVICES OF WIRELESS MEASURING SENSOR NETWORKS

The ZigBee / 802.15.4 technology has three classes of devices: FFD routing devices (Full Function Device - R), Coordinators - FFD with additional system resources depending on network complexity - C) and Reduced Function Device (Reduced Function Device - E). Each ZigBee local network only has one coordinator. His main task is to set the parameters and create a network, the choice of the main radio frequency channel, in the setting of a unique network identifier. Therefore, the coordinator is the most complex of these three types of devices, it has a large amount of memory and increased power consumption (usually used by AC power). Routers are used to extend the range of the network, because they are able to perform repeater functions between devices located far one from another. Routers support any ZigBee network topology, can perform coordinator functions and access all network nodes (FFD, RFD). Devices with a limited set of functions do not participate in routing, can not perform the function of the coordinator, apply only to the local network coordinator (FFD device), support topology type "each with each", "star", play the role of end nodes of the network. In practice, most of the network nodes are RFD devices, and the use of FFD devices and coordinators is needed to create communication bridges and the corresponding network topology. Once routers and other devices are connected to the network, they receive information about it from the coordinator or any other existing router already involved in the network, and based on this information, establish their operating parameters in accordance with the characteristics of the network. A ZigBee router receives a network address table that it distributes between its end-devices that are connected to it.