Adaptive control at the channel level of the packet radio networks with a rigid strategy for accessing the radio channel
DOI:
https://doi.org/10.20535/kpisn.2023.1-4.274795Abstract
Background. Development of methods and means of the adaptive management control of the bandwidth radio networks with competitive access to the radio channel.
Objective.
Determination of the effect of packets length on the effective transmission speed of radio networks taking into account the parameters, formats and procedures of the physical and channel levels when using six possible strategies of the adaptive CSMA protocol with a rigid strategy of competitive access to the radio channel.
Methods.
The goal is achieved by creating and analyzing a mathematical model of effective transmission speed in radio network. The model is described by the equation of the effective transmission rate, which is a function of the probability of conflict-free transmission of the adaptive CSMA protocol for rigid strategy and the deviation coefficient of the size of data packets from the optimal LLC protocol, taking into account the probability of packet damage due to interference in the radio channel.
Results.
With the help of this mathematical model, it is proved that of the six packet length management strategies for adaptive CSMA protocols with a rigid strategy, only the first, third and sixth strategies have practical significance from the point of view of increasing the effective transmission speed, provided that the influence of the parameters of the physical and LLC levels is taken into account. For these strategies can be calculated according to this model the optimal size of the length of data packets for each set of system parameters, such as the transmission speed, the probability of damaging one bit of information due to interference in the radio channel, and the structure of the packet of the LLC protocol.
Conclusions.
The proposed mathematical model is a tool for calculating the bandwidth of radio networks and the optimal size of data packets during adaptive management of competitive access to a radio channel with a hard strategy in conditions of significant fluctuations in traffic intensity and changes in the intensity of interference in the radio channel.
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