Probabilistic Random Multiple Access Procedure Model to the CSMA/CA Type Medium
Maksim Peregudov, Anatoliy Steshkovoy, Aleksey Aleksandrovich Boyko · Informatics and Automation · 2018
Today its very important to provide the safety functioning of digital radio networks in the conditions of destructive influences from the malefactor. Antijamming methods are applied to protection against destructive influences at the physical OSI level, and on network and the highest OSI levels enciphering is applied. Practice shows that the most dangerous vulnerabilities for destructive influences are concentrated on the data link level of digital radio networks in the procedures which are responsible for random multiple access for subscribers. In work the mathematical model of the procedure of random multiple access to the environment of a digital radio networks like CSMA/CA is presented. The model takes into account potentially possible destructive influences on the part of the malicious intent by clarifying its probabilistic and temporal characteristics and allows evaluating the effectiveness of random multiple access to the environment of digital radio networks like CSMA/CA under such conditions. As a result of the simulation, it was revealed that with practically identical values of the potentially destructive effects characteristics, the effectiveness of the existing algorithms for realizing random multiple access to the CSMA/CA type environment is tending to zero. The results of the work are applicable in the development of algorithms for automatic recovery of the operability of digital radio communication networks in conditions of destructive influences on the part of the attacker.