Abstract
It has been established that the IoT concept has three interrelated basic issues: providing information security (IoT Security), scaling up the growing volume of technical devices and data (IoT Scalability), and IoT Technical Solutions and Low-Power Consumption. Also, the analysis of protocols for solving IoT tasks was carried out: MQTT: protocol for collecting data of devices and transmitting their servers (D2S); XMPP: protocol for connecting devices to humans, partial case of D2S-schemes when people connect to servers; DDS: fast bus for integrating smart devices (D2D); AMQP: The system organizes queues for connecting servers (S2S). Stochastic models of the functioning of wireless sensor networks that use randomized network parameters (with variable number of nodes and random participation of nodes in separate groups of network nodes) have been improved. It allowed us to estimate the probability of collision of signals and to more effectively design communications protocols of the IoT. These models allowed us to estimate the probability of collision of signals: the maximum number of nodes that provide the quality of transmission at the level of the probability of collision no higher than 10-2 is 50, with the number of nodes involved in the collision is negligible in comparison with the average number of transmissions, in particular, the ratio of the average number involved in the collision of nodes to the average number of transmissions is 10-7. Given results can be used for developing an effective environment monitoring system.