Cross–layer–based reliable robust transmission for emergency messages in high mobility unreliable VANET networks. (24th March 2015)

• Record Type: Journal Article
• Authors: Chang, Ben–Jye; Liang, Ying–Hsin; Yang, Tsung–Yuan
• Is Part Of: International journal of ad hoc and ubiquitous computing. Volume 18:Number 3(2015)
• Page Start: 139
• Page End: 152
• Publication Date: 2015-03-24
• Subjects: cross–layer messages -- active safety -- safe driving -- enhanced AODV routing -- path reliability -- robust transmission -- VANETs -- vehicular ad–hoc networks -- vehicular networks -- emergency messages -- high mobility -- mobile networks -- unreliable networks -- intelligent transport systems -- ITS -- ad hoc on–demand distance vector -- TCP connections; Ubiquitous computing -- Periodicals; Embedded computer systems -- Periodicals; Electronic data processing -- Distributed processing -- Periodicals; Wireless communication systems -- Periodicals; Computer architecture -- Periodicals; 004.2
• Languages: English
• ISSNs: 1743-8225

Abstract

To achieve active safe driving has become a key trend in intelligent transport systems (ITS). However, in the high–mobility unreliable vehicular ad–hoc networks (VANETs), the emergency messages or the driving videos are difficult to be sent to the receivers, the platoon leader or the cloud server in time. The reliable end–to–end transmission protocol suffers from extremely unreliable links, high mobility, and hardly providing an accurate congestion window (cwnd) for transmissions. This paper proposes a Cross–Layer–based reliable robust CL–TCP to forward real–time emergency messages. CL–TCP proposes several TCP states: congestion, loss, unstable, frozen and disconnecting, to control TCP cwnd according to the status of L2 and L3 protocols. The Enhanced AODV (EAODV) algorithm is proposed to increase path reliability and maximize throughput. The designed cross–layer messages include: CL_EAODV, CL_ICMP_FB, CL_ICMP_DU, etc. Numerical results demonstrate CL–TCP outperforms others in goodput, number of link–breaks, average packet delivery ratio. Furthermore, CL–TCP yields a higher fairness among TCP connections.