Velocity based Reliable Forwarding Strategy Towards Disconnect Link Avoidance in NDN- VANETs Muhammad Burhan, Rana Asif Rehman Department of Computer Science National University of Computer and Emerging Sciences Chiniot-Faisalabad Campus, 35400, Pakistan mbsh909@gmail.com, r.asif@nu.edu.pk Byung-Seo Kim Department of Software and Comm. Engineering Hongik University Sejong City, 30016, Repulic of Korea jsnbs@hongik.ac.kr Abstract—Vehicular Named-Data Network (VNDN) is an adoption of Named-Data Network (NDN) and Vehicular ad hoc Network (VANET). Unlike current Internet architecture i.e., TCP/IP, vehicles require desired content objects by broadcasting the name of them in the form of Interest packet. The vehicle who has requested content object, simply generates Data packet and broadcasts towards the content requester vehicle. In VNDN, there exist no end-to-end connection between vehicles. However, this situation may lead to the problem of broadcast storm of Interest packets, where each vehicle transmit Interest packet in the network to search the producer vehicle. There are a lot of proposed work exist to avoid broadcast storm of Interest packets, but, these solutions lead towards the problem of disconnect link and isolated network between vehicles. The disconnect link prevent Data packets from reaching to the content requester due to high and different speed of the vehicles. Further, isolated network refers as whenever vehicles become unable to broadcast Interest packets in the network. However, a forwarding strategy, Velocity based Reliable Forwarding Strategy (VRFS) is proposed in order to avoid disconnect link problem and isolated network in VNDN. For this purpose, the speed and location information of the vehicles are used during the communication in the network. Furthermore, the proposed scheme is evaluated through simulations as well as compared to the traditional VNDN implementation. Keywords—Named-Data Network, Vehicle ad hoc Network, Vehicular Named-Data Network, Interest packet, Broadcast Storm, Disconnect Link, Isolated Network I. INTRODUCTION For a past few spans, Vehicular ad hoc Network (VANET) has been studied by research, academia and industry communities. It is considered as a sub class of Mobile ad hoc Network (MANET) where it treats the vehicles as nodes in the mobile network [1]. The key purpose is to expand the MANET into a VANET, reduce the risk while driving the vehicle on the road [2]. However, it is considered as an emerging technology to implement the Intelligent Transportation System (ITS) [3]. In VANET, vehicles are equipped with different types of wireless communication sensors to transmit safety and infotainment messages to other vehicles as well as fixed infrastructure, such as road-side units [4, 5]. Furthermore, there are three types of communication approaches; Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I) and Hybrid architecture, where both V2V and V2I communication approaches are covered [6]. Although, VANET have abilities to deal real-time issues regarding the drivers and passengers such as security and transport management but on the other hand, it also faces numerous challenges due to dependence on the current Internet architecture. The current Internet architecture is based on host-centric communication approach, where routing path must be exposed and established among two vehicles. Along, required content object is retrieved through sending the request to the vehicle that has it. However, this communication approach provides severe limitations in order to handle the large amount of network traffic. Furthermore, it faces discontinuous connectivity due to high and dynamic mobility of vehicles [7]. In addition, due to development in architecture of Internet and appearance of variability of application, users appears to have what services and what content objects they need, rather than information regarding the location where service and content object exist. To solve above stated problems, several solutions have been implemented to provide the architecture of future Internet, such as Named-Data Network (NDN). It uses the concept of Information-Centric Network (ICN) and Content-Centric Network (CCN) to retrieve the required content object in network by use of named-based forwarding communication approach [8]. Unlike current Internet architecture, it does not use IP address of the node, where required content object exist. The NDN communication paradigm uses two types of packets; Interest and Data packets to broadcast the name of required content object in the network and retrieve the corresponding content object from the network respectively. There are three entities involved in NDN communication paradigm. First of all, communication is initiated through consumer node by broadcasting the name of the required content object in the network. The producer node, who has ability to fulfil the request of consumer node, generates a Data packet and broadcasts towards the consumer node. Sometime, the producer node does not exist in the communication range of consumer node. However, consumer node takes help of his neighbor nodes to search the producer node, where neighbor nodes in considered as intermediate nodes to convey the packets from consumer node to producer node and vice versa. Authorized licensed use limited to: UNIVERSITA TRENTO. Downloaded on June 30,2020 at 11:16:16 UTC from IEEE Xplore. Restrictions apply.