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Inexpensive sensors capable of significant computation and wireless communication with limited energy resources are available. Once deployed, the small sensor nodes are usually inaccessible to the user, and thus replacement of the energy source is not feasible. Hence, energy efficiency is a key design issue that needs to be enhanced in order to improve the life span of network. Several network layer...
Opportunistic dissemination is a promising research domain, for more and more applications that need efficient information spreading in one area are emerging in vehicular ad-hoc networks (VANETs). The most important characteristic of vehicular networks is that they do not have a stable framework. The communication between vehicles mostly depends on the unexpected meeting. Some available data dissemination...
This paper presents a novel transmission power assignment mechanism for on-body wireless links formed between severely energy-constrained wearable and implanted sensors. The objective is to develop a model based framework in which RF signal strength is predicted and is regulated at a reference value. In particular, the body movement has been modeled as a stochastic linear system and a quantized Linear...
The deployment of wireless sensor networks (WSN) has enabled applications to operate at its optimum and maximum potential. This paper presents the enhancement of the wireless hockey (WiHoc) system ver.1.0. The sensors are utilized to acquire the movement of field hockey players on a coaching strategy board. These are denoted and executed by the Cricket /Mica-2 sensors which have been utilized as the...
Given a wireless network where some pairs of communication links interfere with each other, we study sufficient conditions for determining whether a given set of minimum bandwidth quality-of-service (QoS) requirements can be satisfied. We are especially interested in algorithms which have low communication overhead and low processing complexity. The interference in the network is modeled using a conflict...
In expanded service area of wireless mesh network to support mobility of the mobile station research is recognized as an important issue. The wireless body area networks promise to revolutionize health monitoring. Due to the mobile station move frequently to changing the path, data loss and network performance degradation are often occur, such as the service broken. In the existing research of support...
In recent years, interests in the application of Wireless Body Area Network (WBAN) have grown considerably. Wireless Body Area Sensor networks consist of fixed sensor nodes. Sometimes, creating such a fixed sensor networks could be a daunting task. Wireless Body Area Sensor nodes assume deploying a stationary sensor network over a human body area. Even if an advanced method to make the deployment...
Existing routing protocols such as AODV were used to simplify the shortest path metric. It assumes that all link quality must be the same. It does not consider link quality such as bandwidth, packet loss rate, packet size, etc. Several performance metrics that consider different link quality for WMNs such as ETX and ETT. Although, these metrics can provide more effective performance than the hop count...
The convergent feature of traffic in wireless body area networks (WBANs) makes congestion in certain areas which are the place of events and/or the location of sensor nodes near a sink. Congestion brings packet loss, retransmission, and delay at the node and it also causes the consumption of additional energy. Therefore there is no doubt that congestion needs to be controlled efficiently. In this...
The recent spread of communicable diseases like swine flu, disasters like stampedes and ongoing security issues have made management of large crowded events more critical than ever before. Managing large crowds is a very complex, challenging and costly exercise. Many of the problems encountered in crowd management can be minimized by the use of RFID and other wireless technologies. These technologies...
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