International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
A Data collection scheme with multi-agent based approach for VSNs Shilji k c1 1P
G scholar, Dept. of Information and technology, Govt. engineering college Barton Hill Trivandrum, Kerala, India
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Abstract - VSNs (vehicular sensor networks) is a newly
collection and dissemination of messages over vast distances. VSN (Vehicular sensor networks) is an extension of VANET, in which it consists of sensor nodes as vehicles and road side units (RSUs) [6]. VSN provides a sensing platform in which vehicles and RSUs communicates by collecting and disseminating the information throughout the network. Most of the aspects in Vehicular ad hoc networks and VANETs are same, but the details of both differ. Vehicles interact with the road side units and it can be characterized in an accurate way. Similarly the vehicles mobility range is restricted in an organized fashion. Vehicular Sensor Networks have been spotlighted for many applications such as the driving safety, driving efficiency, and data services in the road networks [7]. The sensors in the vehicles play a vital role in monitoring the road surfaces to detect obstacles and any road hazards. The monitoring is performed by collecting the data from various motion sensors (e.g., accelerometer), and obstacle detection sensors (e.g., ultrasonic and laser sensors) etc. Vehicles are embedded with sensors for the driving safety, particularly for monitoring the road surface and identifying the road hazards are critically important, and those sensing pieces of information can be shared among the vehicles to avoid possible dangerous circumstances and situations.
progressive networking system of VANET (vehicular ad-Hoc networks). And it’s also considered as a subgroup of VANET. This paper focusses upon improving the energy efficiency and data collection in urban networks using agent mechanism. The important components like sensor nodes (vehicles) and roadside units together comprise a Vehicular Sensor Network (VSN). Vehicles are equipped with sensors for the collection and dissemination of data over the network. The road network is divided into small groups of nodes called clusters. It is a challenging task to manage the networks in a dynamic environment due to the various characteristics like high mobility of vehicles, high relative velocity, different behavior of drivers and occurrence of unpredictable link failures. To solve these issues an agent based communication is one of the potential solution approach. But single mobile agents are used in small road segments and have energy constraint problems as well as unnecessary communication delay. This mechanism focusses on a suitable and an efficient aspect to collect sensor readings from VSNs. It also shows the pros and cons of both cluster based and agent based solution approach and also discovers a new and improved scheme. It deploys multiple mobile agents for collecting sensor readings from the given urban areas. Mobile agents serve as an emerging potential solution to efficiently collect sensor readings in VSNs. It achieves remarkably higher network coverage on urban areas and reduces energy and delay constraint issues based on the following assumptions. Finally to overcome the short comings of an agent based scheme an improved multi agent based three layer network architecture approach is also discussed.
Similarly VSN provide a wide range of services in which vehicles are equipped with some short-range and mediumrange wireless sensors. In VSN there exists three types of communication: Vehicle-to-Vehicle and Vehicle-to-road side units, and inter road side communication .The road side units might be a sensor oriented base station. Suppose at the mid-night in some rural area, a vehicle has a very important data packet (i.e. detection of an accident) which should be forwarded to the following vehicles immediately. The probability of low density of vehicles in the rural areas at mid-night is very high. Consequently, in this situation the packet has to be broadcasted, and arrival of the following vehicles in the accident area is unavoidable. To overcome these issues there are two types of sensor nodes that are considered. Some are embedded in the vehicles known as vehicular sensor nodes (VN) and others are deployed in predetermined distances besides the highway road, known as Road Side units. We can have some Base Stations (BS) such as Police Traffic Station. The base stations considered may be either stationary or mobile. The sensor nodes collect the real data such as vehicle’ velocity and position are forward towards road side units. On the other hand, for
Key Words: Mobile agents, Road segment interest (RSI), Vehicular sensor networks (VSN)
1. INTRODUCTION
Vehicular Ad Hoc Networks (VANETs) [5] are discovered from the principles of mobile ad hoc networks (MANETs). Similarly VSN (Vehicular sensor networks) is an emerging networking system from the base concepts of VANET’s. It creates a wireless network for data exchange in the domain of vehicles within the road network. These are the key components of intelligent transportation systems (ITS).VSNs support a wide range of applications from simple one hop information collection and dissemination to multi-hop data
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