Abstract
It is difficult for TCP/IP to manage the mobile nodes in the dynamic environment of VANET (Vehicular Ad hoc Network), so combining urban VANET with a new network architecture—ICN (information-centric network)—this paper proposes a FIB (forwarding information base) selecting scheme based on link quality, and we name it as RSBLQ (Routing Selecting Based on Link Quality). The metrics of link quality in RSBLQ are mainly LET (link expiration time) and link available probability. To reduce network delay, cache redundancy, and network traffic, our RSBLQ has the following designs: (1) we modify the structure of PIT (pending interest table) by adding two domains: receive time and tolerance time; (2) we introduce the algorithm of LET to help with the content routing selection in FIB; (3) RSBLQ also gets the link available probability to be another metric for our algorithm. Simulation results show that in terms of average response time, the performance improvement of RSBLQ is about 10, 15–20, and 60% compared to CCVN, V-NDN, and TCP/IP, respectively; it approximately has 8 and 13.8% improvement than CCVN and V-NDN about cache hit ratio; and the network traffic also decreases a lot.
Highlights
Due to the significant research and technology advancements in wireless communication, the traditional intelligent transport system (ITS) [1] has evolved towards vehicular communication
(3) we introduce the LET and link available probability [11] as the metrics of link quality to help with the content routing selection in FIB; RSBLQ would calculate the LET and link availability of each link associated with each FIB outgoing interface
The contribution of our work lies in the following aspects: (1) by using information-centric networking (ICN) idea, RSBLQ makes the communication in Vehicular Ad hoc Networks (VANETs) more flexible, the nodes can adapt to the dynamic environment well with ICN features, which is because there is no need for the request to arrive at a fixed destination node, an interest can be satisfied by any content nodes at any time, and it improves the network efficiency
Summary
Due to the significant research and technology advancements in wireless communication, the traditional intelligent transport system (ITS) [1] has evolved towards vehicular communication. 1.1 Limitations in conventional VANET The communication architecture [4] of conventional VANETs can be divided into three categories including Wireless Access in Vehicular Environments (WAVE)based Wi-Fi, ad hoc, and hybrid. In WAVE-based Wi-Fidriven architecture, RSUs (road-side units) alongside roads are used as wireless access points which provide communication coverage to the vehicles inside its coverage area. As technological advances have brought greaterthan-ever numbers of computing devices, most of which are mobile, managing IP address assignments for all of these devices is becoming increasingly infeasible and less meaningful. Some researchers begin to consider applying other technologies to VANET to shield the limitation mentioned above
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