Innovations in technology and its rapid deployment in day-to-day matters has become the center of attraction for improvingquality of life. In this context, Vehicular Ad Hoc Network(VANET) has become a promising topic in research communitydue to its various applications like safety, infotainment, traffic management application etc. and supports for Vehicle-to-Vehicle(V2V) and Vehicle-toInfrastructure (V2I) communication. To reducethe number of accidents, safety applications require effectiveV2V communication. Vehicles broadcast two types of messages, beacons and emergency messages, through the Control channel (CHH) of Dedicated Short Range Communication (DSRC). Beacon messages include vehicle status like position, velocity, etc.that are disseminated periodically. With the increase in a number of vehicles, dissemination of safety messages becomes congested, for mitigation of which we analyze congestion detection schemes as well as congestion control. Effective congestion control algorithm involves incorporation of Decentralized Congestion Control (DCC) scheme using rate adaption on the lower layers of the protocol stack, i.e., Physical and Medium Access layer (MAC). The effects of congestion on vehicular safety can be controlled by designing a DCC algorithm including with priority model and transmission rate of the beacon, which provides more reliable and timely reception of safety messages. DCC algorithm controls the congestion by maximizing the transmission rate of the high priority safety messages. A novel approach is proposed regarding congestion control and performance is analyzed with respect to some indexes such as Packet-Delivery-Rate (PDR) and End-to-End (E2E) delay. The proposed scheme improves the PDR and E2E dealy along varying traffic density.
Transmission Rate-based Congestion Control in Vehicular Ad Hoc Networks
2019-02-01
229779 byte
Conference paper
Electronic Resource
English
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