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Recently, wireless sensor network is widely used. The deployment of WSN in the field, however, is still restricted due to limited energy supply, limited computing power, limited buffer size, and packet delay. In this paper we present a new cluster model and polling protocol integrating the schedule polling and low power listening scheme. The new clustering approach allows short routing between the...
Improvements in network infrastructures, storage capacity and computing power, along with advances in video coding technology, are enabling an increasing popularity of multimedia applications. Traffic modeling plays an important role in the performance evaluation of network architectures and protocols. In this paper, we describe a tool for video traffic modeling. A graphical user interface is presented...
There is usually a tradeoff between security strength and computing power in a real time health monitoring system. In this paper, we firstly investigated the performance of several cryptographic protocols for different data sizes applied on the system in different network condition, and then presented a security protocol adaption scheme allowing to automatically change the encryption algorithm to...
If cluster C1 consists of computers with a faster mean speed than the computers in cluster C2, does this imply that cluster C1 is more productive than cluster C2? What if the computers in cluster C1 have the same mean speed as the computers in cluster C2: is the one with computers that have a higher variance in speed more productive? Simulation experiments are performed to explore the above questions...
Despite many technology advances, the limited computing power of sensors encumber them from taking part in service-oriented architectures. In recent years, the sensor-networking subject has been extensively studied, with the focus on efficient usage of energy in sensors and efficient usage of sensor node processing power. However, providing sensor nodes with the relevant computing power and network...
Nowadays, grid computing is moving from sharing computing power and storage resources to sharing business resources, including any abstract business entities and resources. The new trend brings a big challenge, since these universal business resources typically do not belong to the same level. Describing them is already difficult; describing them in a unified way is even more difficult. Business process...
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