Abstract
Information-Centric Networking advocates ubiquitous in-network caching to enhance content distribution. Nonsafety application in vehicular communications is emerging beyond the initial safety application. However, content distribution based on TCP/IP Internet service in vehicular networks suffers from typical issue of low delivery ratio in urban environments, where high buildings block or attenuate the radio propagation as well as short radio coverage range. In order to solve this issue to deliver proximity marketing files, in this paper we propose in-network caching scheme in vehicular networks in accordance with traffic features, in which every vehicle is treated as either a subscriber to request a file or as a cache node to supply other nodes so as to accelerate file transmission effectively. Cache strategy of leave copy everywhere is uncoordinated and distributed, which fits the random and dynamic vehicular network. The performance evaluation is carried out by comparing the proposed scheme with the legacy solution of TCP/IP based scheme using simulation tools of OMNeT++ and Veins and SUMO, which is supplied with real-world urban map associated with random but reasonable traffic routes generated by our designed software for every vehicle. The simulation results validate the proposed scheme in four aspects: robustness resisting obstacle buildings, reliability and scalability in different traffic loads, low utilization ratios of RSUs and Internet resource, and efficiency of cache functions.
Highlights
Information-Centric Network (ICN) has motived the development of future Internet architectures instead of the current Internet of host-to-host communication model [1,2,3]
TCP/IP protocols have been proposed to run on top of vehicular networks for data exchange among vehicles [7, 11], a fundamental limitation is that the requirement of infrastructure support is essentially needed for global IP address allocation [7], which is somewhat infeasible to assume a sustainable availability on infrastructure support due to instability connectivity to Road side unit (RSU) infrastructures such as radio attenuation caused by obstacle buildings and limited radio coverage range shown in Figure 1, as well as rapidly expanded Internet traffics
Our work in this paper addresses an in-network caching based scheme shown in Figure 2, which aims at solving the issue of low data delivery caused by obstacle buildings and short radio coverage range in a metropolitan area for proximity marketing file distributions
Summary
Information-Centric Network (ICN) has motived the development of future Internet architectures instead of the current Internet of host-to-host communication model [1,2,3]. TCP/IP protocols have been proposed to run on top of vehicular networks for data exchange among vehicles [7, 11], a fundamental limitation is that the requirement of infrastructure support is essentially needed for global IP address allocation [7], which is somewhat infeasible to assume a sustainable availability on infrastructure support due to instability connectivity to RSU infrastructures such as radio attenuation caused by obstacle buildings and limited radio coverage range shown, as well as rapidly expanded Internet traffics. Our work in this paper addresses an in-network caching based scheme shown, which aims at solving the issue of low data delivery caused by obstacle buildings and short radio coverage range in a metropolitan area for proximity marketing file distributions. The proposed scheme makes an effort to achieve high data delivery ratios and to reduce the access frequency to RSUs and the Internet traffic by adding vehicle-to-vehicle communication model since every vehicle is equipped with an on-board cache. Proposed In-Network Caching Based Scheme and Legacy Solution of TCP/IP Based Scheme
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