A METHOD FOR INCREASING THE RELIABILITY OF DATA EXCHANGE BETWEEN REMOTE NODES IN CONDITIONS OF A LIMITED SIZE OF MESSAGE IDENTIFICATION FIELDS
The widespread use of distributed information systems for managing technological processes and complex technical objects has led to the creation of a special class of communication protocols. These protocols are characterized by high energy efficiency and low bandwidth. This cause strict restriction on the size of the transmitted information frame and reduces the size of the service and identification information fields. These fields are used by the distributed system components for determination the source that formed the transmitted control or information message. To increase the reliability of identification, methods based on determining the source for groups of messages have been created. Their disadvantage is the high computational complexity, determined by the number of possible options for forming such groups from the entire set of received messages. The article considers a method of limiting the processed blocks set to increase the identification reliability and reduce the computational complexity of the algorithms implemented in this case under conditions of a limited size of the identification information field by several bits. Mathematical models of the formation and processing of sets of messages by receivers are described. Based on the obtained results, it is shown that using the stability of the message flow characteristics allows us to significantly increase the reliability of methods based on determining the source for messages groups. The conditions for the discussed method application, which the greatest decrease in the identification error probability is observed, are determined. The practical result of the conducted research is to reduce the identification information fields size in data packets transmitted between devices of distributed information systems via communication channels with limited bandwidth, and to reduce the number of re-queries caused by errors. It reduces the transmitted data information redundancy and increases the devices performance.