METHOD OF PACKET FRAGMENTATION IN UNSTABLE DATA EXCHANGE IN COMPUTER NETWORKS ON TRANSPORT

Nina Kuchuk; Galina Cherneva; Viacheslav Davydov

Scientific paper ID 2064 : 2021/1

METHOD OF PACKET FRAGMENTATION IN UNSTABLE DATA EXCHANGE IN COMPUTER NETWORKS ON TRANSPORT

Nina Kuchuk1, Galina Cherneva2, Viacheslav Davydov 1

Transmission of packets of the maximum length does not in all cases provide the best probability-time characteristics. In such cases, it is customary to use the fragmentation mechanism. This approach is most useful for unstable data exchange in computer networks in transport.

The purpose of the article is to develop a method for fragmentation of packets with un-stable data exchange in computer networks on transport.

The article proposes a criterion for the fragmentation of the original data packets to achieve the maximum possible reduction of the error probability under the given conditions. This criterion is the maximum ratio of the error probability of the original packet to the error probability of the fragmented packet. The dependence of the optimal number of fragments on the length of the information part of the original data packet is shown. A method for calculating the optimal number of fragments with known characteristics of the data transmission channel and fixed sizes of information, service and verification information is presented. It has been proved that the optimal number of fragments increases with an increase in the size of the information part of the packet and with a deterioration in the quality of the communication channel. It is also shown that when using poor quality communication channels for data transmission and/or the need to transmit packets of considerable length, the advantages of fragmentation become more significant. For such conditions, the original packet should be split into smaller fragments.

One of the directions for further research in this area is to determine the criterion for fragmentation of original packets to reduce the average delivery time while increasing the reliability of the data.

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передача данных фрагментация вероятность ошибки критерий фрагментацииdata transfer fragmentation probability of error fragmentation criterionNina Kuchuk Galina Cherneva Viacheslav Davydov

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