پروتکل مسیریابی الهام گرفته از میکروب برای VANETs
Abstract
I- Introduction
II- Related Work
III- Unicast Routing Protocol Based on Attractor Selection
IV- Simulation Results
V- Conclusion
References
Abstract
We present a bio-inspired unicast routing protocol for vehicular Ad Hoc Networks which uses the cellular attractor selection mechanism to select next hops. The proposed unicast routing protocol based on attractor selecting (URAS) is an opportunistic routing protocol, which is able to change itself adaptively to the complex and dynamic environment by routing feedback packets. We further employ a multi-attribute decision-making strategy, the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS), to reduce the number of redundant candidates for next-hop selection, so as to enhance the performance of attractor selection mechanism. Once the routing path is found, URAS maintains the current path or finds another better path adaptively based on the performance of current path, that is, it can self-evolution until the best routing path is found. Our simulation study compares the proposed solution with the state-of-the-art schemes, and shows the robustness and effectiveness of the proposed routing protocol and the significant performance improvement, in terms of packet delivery, end-toend delay, and congestion, over the conventional method.
Introduction
Over the past few decades, the Intelligent Transportation System (ITS) has been developing rapidly, owing to the rapid development of wireless network technologies and the increasing traffic demand. The Vehicular Ad Hoc Networks (VANETs) has become an emerging research focusing on the communication among vehicles without the extra support of infrastructure [1], [2]. There are many potential applications in the field of VANETs, such as traffic management, collision avoidance, cooperative driving [3], [4]. As one type of Mobile Ad Hoc Networks (MANETs), VANETs have to face many problems not only inherent in MANETs, such as competition, interference, channel weakness but also high vehicular mobility, quick topology changes, limited geographical position and direction of movement. Due to the mobility nature of vehicles, the duration time of communication link between two vehicles is quite short [5]. For example, when the signal radius is 250m and the average speed is 100 km/h, the probability of two vehicles keeping continuous communication for 15 seconds is only 57% [6]. Due to the restrictions of the urban road and the differences in time, development and function of various regions as well as distribution among traffic flows, traditional MANETs routing protocols will not be suitable in VANETs and thus we need seek new mechanisms.