Abstract
Inefficient data transmission has been a development bottleneck of Vehicular Ad-hoc NETworks (VANETs), especially in urban areas. It has been proved that many complex IP-based solutions are difficult to be applied in the highly dynamic and link-interrupted vehicular environment. In recent years, Named Data Networking (NDN) has become the most popular realization of Information-Centric Networking (ICN) for future networks. Its characteristics of multi-source, multi-path and in-network caching are helpful for improving the data transmission in VANETs. However, the bottom layer of vehicles cannot provide multiple interfaces to different domains like the routers in wired networks. Thus interface-based forwarding degenerates into directionless broadcasting with low performance and high overhead. Against this problem, we propose COMPASS, a novel named data transmission protocol for VANETs. Firstly, a dynamic directional interface model is built as the cornerstone of our COMPASS. Secondly, the forwarding strategies are improved for rapid interest dissemination and named data retrieving. Besides, an interface remapping method and the update strategies of Forwarding Information Base (FIB) and Pending Interest Table (PIT) are designed to enhance the robustness in high-mobility environment. Finally, the performance of COMPASS is verified on ndnSIM. Compared with the other three state-of-the-art protocols, COMPASS obtains the highest interest satisfaction ratio and the shortest transmission delay in urban traffic scenarios with restricted communication and storage overhead.
Highlights
In recent decades, Vehicular Ad-hoc NETworks (VANETs) have been a research hotspot concerned by both academia and industry
DYNAMIC DIRECTIONAL INTERFACE MODEL Aiming at the defects of static division strategy, we propose a novel Dynamic Directional Interface Model (DDIM) based on the movement patterns of vehicles in urban areas
In this paper, we present that the lack of valid underlying interface is a key reason resulting in inefficient named data transmission of VANETs
Summary
VANETs have been a research hotspot concerned by both academia and industry. Some research works [6]–[8] have attempted to deploy NDN on VANETs and proposed the concept of Vehicular Named Data Networking (VNDN) [9]. Some methods [12]–[14] have been proposed to alleviate this problem such as adopting a delay-based distributed broadcast algorithm and selecting the optimal neighbor as the relay at hop according to one or multiple attributes [15]–[18] These efforts can mitigate broadcast storm by reducing network redundancy, they cannot achieve efficient named data transmission. To deal with the high mobility of vehicular environment, an interface remapping method is put forward to maintain the validity of FIB and PIT entries after the driving directions of vehicles have changed.
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