Reduction of end-to-end delay using threaded RaptorQ codes in VANETs

Abstract

Multimedia data transmission, a prevalent and significant requirement in Vehicular Adhoc Networks (VANETs) demands less end-to-end delay. The transmission of data in VANET scenarios is challenging as the vehicles are mostly on move resulting in dynamic topology. RaptorQ (RQ) codes help in error correction, where the redundant symbols sent along with the actual symbols help in correcting the errors encountered in the receiver(s), eliminating the requirement of retransmission. In this work, the reduction of end-to-end delay of the video data transmitted in VANETs is achieved with the usage of RaptorQ codes, while encoding in the transmitter and decoding in the receiver. Multithreading is introduced in both the ends to further reduce the delay incurred. The various scenarios exhibiting all possible combinations of single or multiple hops, single transmission or multiple transmission are observed and the results showing the influence of RQ encoder and decoder in reducing the end-to-end delay are presented.