Opportunistic Delayed Transmission for Network Coding in Vehicular Wireless Networks

Hong, Jing-Lin; Wang, Tsan-Pin; Hsieh, Yi-Ju

doi:10.7125/apan.38.6

Cited by 1 publication

(2 citation statements)

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“…The ODT (Opportunistic Delayed Transmission) scheme is proposed to compromise between the delay and coding opportunity where the mid node may be waiting for a certain period of time to maximize the coding opportunity. This scheme not only increases the coding rate, but also the packet-delivery rate [45]. Network coding and Multi-Hop Beaconing have been used in combination to improve the reliability and awareness in vehicular networks.…”

Section: Related Workmentioning

confidence: 99%

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An enhanced heuristic XoR network coding-based method for high quality video streaming over VANETs

et al. 2019

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One of the most important challenges in live video streaming in mobile vehicular networks is the optimal use of broadband and point-to-point packet delay. Recent studies show that the sheer use of frames flow compression methods (such as H.264 or HEVC) and the proper communication overlay, such as Peer-to-Peer (P2P), has no absolute influence on increasing the quality of received video in VANET networks. Therefore, the use of an appropriate data exchange method, such as network coding, seems to be of great importance. Compared to Random Network Coding (RNC), XoR Network Coding (XNC) method has the least computational load for the network which is an important factor in optimal use of limited energy of nodes in a wireless network. The basic problem in XNC is that when a node is supposed to combine several frames and transmit them through an encoded frame, how this combination could be made to enable other nodes of the network to be broadcasted through receiving this packet and how can the available packets in their buffers decode as well as extract the largest number of frames in order to experience a higher video quality. To fulfil this aim, an encoding intelligent method is required which is based on the buffers’ status of neighbours. In the proposed method in this article, the best frame combination is reached through buffers status of neighbours and AHP methods or AHP-TOPSIS methods, and the encoded frames are broadcasted through XNC. Simulation results show that due to the reduction in number of transmitted packets in the network, parameters such as congestion and point-to-point delay are significantly reduced and vehicles experience a higher video quality compared with other similar methods.

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Section: Related Workmentioning

confidence: 99%

“…Previous researches show that XNC is an efficient and practical method for video broadcasting in vehicular networks. According to these studies, although XNC increases the throughput considerably [33,38,39,45,55,56], it suffers from the following problems:…”

Section: Problem Statementmentioning

confidence: 99%