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Wireless Sensor Networks (WSNs) have a wide variety military applications including battlefield surveillance, enemy tracking, and target classification. In this paper, we propose a WSN architecture based on a mobile sink. The proposed architecture differentiates the regular data from the critical data, and leverages this difference to reduce the energy consumption in WSNs. We formally modeled the...
Vehicular Ad hoc Networks (VANETs) has a high node mobility speed, frequently changed network topology and limited node movement directions. Simulation is the main method that obtained in the VENET's research. The simulation of VANET includes two main parts: the built of vehicular mobility model and the simulation of self-organizing wireless mobile network. The authenticity of network simulation result...
Content sharing, dissemination and collaboration in open environments require the ability to send and combine data packets across network even in the absence of an end-to-end connected path [1]. User mobility plays a fundamental role in selection of intermediate relays for multi-hop communication [2]. Current schemes do not take into account the effect of power law distribution of inter-contact times,...
In dynamic wireless networks, effective modeling on link behavior would lead the network protocol design towards a predictive and reasonable way. Emerging mobile ad hoc network (MANET), however, is of self-organizing and infrastructureless paradigm, where topology dynamics are highly related to many complicated parameters, such as node density, mobility model, and transmission range etc, which make...
The performance of Mobile Ad Hoc Networks (MANETs) is influenced by many factors including node mobility, node density, and wireless transmission range. The mobility model representing the moving behavior of mobile nodes plays an important role in performance analysis and simulation of MANETs. In this paper, we first investigate the effect of node mobility on two fundamental characteristics of MANETs:...
Opportunistic networks are one of the fast developing research areas in mobile communications. Under opportunistic networks, mobile nodes try to communicate with other nodes without any prior information and knowledge about the network topology. Furthermore, the network topologies are dynamic and can rapidly change. In addition, communication under opportunistic networks can be erratic, thus routes...
Mobility modeling is important to analyze the network performance of protocols since it determines the network topology inducing the network performance. In this paper, we analyze the real trace data in military operations, and design a new mobility model for military units. Based on the military training trace data of the KCTC (Korea Combat Training Center) in Hong-Cheon, Korea, we investigate the...
Link topology lifetime is not only an important metric to evaluate the dynamic characteristic of ad hoc network, but also is a direct and effective method to determine the time to perform ad hoc network measurement. This paper introduces the concept of ldquosnapshotrdquo to take the picture of link topology of three classical mobile mobility (i.e., RPGM, Freeway and Manhattan) respectively. Simulation...
We developed a quality of service (QoS) management system to support service level management (SLM) for global enterprise services. The QoS management system is integrated with one of our enterprise services in a preproduction system, an identical system as the production system but in a test environment. Lab experiments showed that our integrated solution helps global enterprise services to better...
A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes...
The next generation of wireless communication is a ubiquitous radio system concept, providing wireless access from short-range to wide-area, with one single reconfigurable and adaptive system for all envisaged radio environments. This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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