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T-Comm Vol.13. #12-2019
47
ТРАНСПОРТ

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T-Comm Tом 13. #12-2019
48
ТРАНСПОРТ

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T-Comm Vol.13. #12-2019
49
ТРАНСПОРТ

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T-Comm Tом 13. #12-2019
50
OUTLINE MESSAGE RELAYING MODEL AT THE NETWORK 
OF AN AUTOMOBILE SHORT-RANGE COMMUNICATIONS DEVICES
Darya G. Vasilchenkova, 
VlSU, Vladimor, Russia, 
[e-mail]
Andrey S. Golubev, 
VlSU, Vladimor, Russia, 
[e-mail]
Mikhail Yu. Zvyagin, 
VlSU, Vladimor, Russia, 
[e-mail]
Artem N. Zolotov,
VlSU, Vladimor, Russia, 
[e-mail]
Abstract
We consider the process of relaying information messages between short-range radio devices (Dedicated Short Range Communications
(DSRC) technology) fixed on vehicles. The main distinguishing feature of intelligent transport systems of this type is the ability to pro-
vide subscribers with help and assistance infor-mation services on an autonomous basis, i.e. without direct access to global information
networks. In this case, we consider the task of retransmission a message from a vehicle that has lost mobility due to an acci-dent or
technical malfunction out of range of a mobile operator to one of the nearest base stations or a sta-tionary DSRC-device to inform
the emergency service. The goal is to save information traffic without losing the efficiency of message delivery. Proposed algorithm con-
siders the topological and dynamic characteristics of the network, determined by the features of the car traffic in the flow. The princi-
ple of its operation is to implement multi-path routing of messages based on the relative position and direction of movement of tran-
sit network nodes. Moreover, the algorithm does not use any a priori information about the configuration of the road network and
coverage area. For debugging and analysis of the algorithm a computer experiment was built using the capabilities of the traffic simula-
tor Simulation of Urban Mobility (SUMO). Three types of street-road network are considered and a variation of all parameters of the
algorithm is implemented. The resulting parameters are estimated that characterize the efficiency, speed of message delivery and the
density of communication traffic. The obtained results allow us to state that the algorithm is stable with respect to a change in its
parameters and performs the assigned task.