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This paper proposes a novel intelligent transportation system (ITS) using the cellular network, GPS probes, and limited ITS infrastructure for edge-level speed estimation under heterogeneous traffic condition. The erroneous vehicle position data taken from cellular network are processed in real time to compute edge level vehicle flow, space occupancy, and congestion with a mean error of less than...
Tree is a widely used topology for Wireless Sensor Networks (WSNs). As Time Division Multiple Access (TDMA) eliminates collisions, it is a preferred channel access mechanism. Often multiple sinks are deployed in WSNs. Use of multiple sinks provides fault tolerance and load balancing. In tree based networks, every sink becomes root of exactly one tree. When node deployment is not uniform across the...
In the earlier work [1]-[2], an Intelligent Transportation System (ITS) was designed using cellular network, GPS probes and limited ITS infrastructure for real time vehicular speed estimation. The speed estimations have a certain amount of error and the estimation may not be available at all the times and locations. This paper assesses the utility of such traffic information in an Advanced Traveler...
Rapid urbanization and industrialization has resulted in a sustained degradation of environmental quality parameters. It is important to keep track of various environmental pollution indices so that realistic models can be developed and relevant public policies are created. Traditional methods for air pollution measurement are expensive and have a spatial constraint. With these limitations, air pollution...
Data collection is very basic application of Wireless Sensor Networks. Sensor nodes are deployed in region to be observed. They sense quantity of interest. It may be temperature, pressure, humidity, solar radiation and so on. The sensed readings are transferred to a central node known as sink or base station. Often networks are heterogeneous in nature i.e. more than one types of sensors are deployed...
In developing countries like India, limited Intelligent Transportation Systems (ITS) infrastructure is available and it is difficult to generate real time traffic information for city wide or larger regions. On the other hand, cellular network is widely deployed in India covering major part of the road network. However, cellular network based positioning data have large location error (250-500 meters)...
Micro-blogging in Mobile Social Network can be very successful because of spatiotemporal properties of user interests and generated messages. Users can follow their interests and receive messages of their interests without getting overwhelmed instead of having to identify and follow users having similar interests. We propose a distributed and scalable micro-blogging protocol which exploits community...
Intelligent Transportation Systems (ITS) play major role in generating fine grained vehicular traffic information for city wide or larger region. However, in developing countries like India, limited ITS infrastructure is available. On the other hand, cellular infrastructure is widely deployed in India with more than 867 million cellular connections and more than 70% cellular teledensity [1]. Also,...
Data collection is an important operation in Wireless Sensor Networks. Sensors are deployed in given region of interest. They sense physical phenomenon and transfer data to a central node known as Sink. Tree is a widely used routing topology and Time Division Multiple Access (TDMA) is a widely used Medium Access Control (MAC) protocol. Sink is at the root of the tree. Often nodes in a tree aggregate...
In many sensor network applications, messages are perciodically flooded through the network. Routing protocols also depend on such flooding for their functioning. Establishment of a connected dominating set (CDS) helps in reducing the cost of such operations. We propose a robust distributed algorithm for setting up a CDS and maintaining the CDS under a variety of node and link failures. We compare...
Delay tolerant ad hoc network between mobile devices is a promising paradigm which can avoid significant cost of cellular data transfer. Many interesting applications such as peer-to-peer file transfer, micro-blogging etc. are possible on this network. We propose viral spread (Many-to-all broadcast) for such networks. Viral spread can be useful to variety of such applications as well as for routing...
Availability of city wide accurate traffic information enables optimal flow of vehicles in a road network. Intelligent Transportation Systems (ITS) play major role in generating fine grained traffic information. However, in developing countries like India, limited ITS infrastructure is available and city wide manual traffic surveys are the basic source of traffic information. Manual traffic surveys...
Data collection is the most basic application of sensor networks. Sensors are deployed in a given region of interest. They sense some physical phenomenon and store the readings. All the sensors send stored data to sink. Sink is a central node which may be connected to the Internet. Sensor nodes may use either CSMA/CA or TDMA at the MAC layer. TDMA prevents collisions. Packets need not be retransmitted...
Workers in labor-intensive manufacturing units, in general, maximize their earnings by subjecting themselves to greater risk of occupational health hazards (RoOHH) mainly due to economic reasons. To embark upon this issue, we introduce an intelligent system employing artificial neural network (ANN) and non-dominated sorting genetic algorithm (NSGA-II). Experimentations are carried out in a brick manufacturing...
Cutwidth minimization problem (CMP) consists of finding a linear layout of a graph such that the maximal number of cuts of a line separating consecutive vertices is minimized. CMP has significant applications in VLSI design, network communications, automatic graph drawings and information retrieval but it is proven to be a NP hard problem. Exact results of cutwidth are known for some classes of graphs...
Using cross layer information exchange to build a routing protocol for mobile adhoc networks have been shown to improve the power consumption of the network [10]. In this work we propose a cross layer approach that uses the MAC layer link stability information to improve the routing efficiency. Signal strength of the link is captured from the MAC Layer and used at network layer to predict the future...
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