Optimisation of Message Distribution in Ad-hoc networks

Vehicular Ad hoc network (VANET) can serve as a sourceand storage of up-to-date data that improve safety, flu-ency and comfort in road traffic. We aimed in this disser-tation thesis on improvements in end-to-end communica-tion between two VANET nodes by means of proposinga new application-level communication protocol that isspecialised on transferring large object structures. In or-der to minimise size of transferred message, the protocolmakes use of the information about the structure thatboth communicating parties already share. The proto-col uses UDP as an end-to-end datagram transportationservice, because it is, according to our simulation results,more efficient than TCP. In order not to waste success-fully received datagrams, the proposed protocol uses ad-dressing that allows processing of independently receiveddatagrams and using their contents for reconstructing thetransferred message. In case of not receiving all the data-grams the message cannot be reconstructed completely,its missing parts are exactly denoted so that a receivingapplication is able to make use of at least the receivedpart.