Chih-Chuan Cheng

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Many energy efficient routing protocols have been proposed in sensor networks for different scenarios and various applications in literature. One of the efficient way is to group sensors in the neighboring into clusters and send aggregate data by a designated cluster head. However, such design discipline still can not balance the energy consumption of the(More)
Home sensor nodes are devices embedded in home appliances and are designed to sense environments, to process collected information, to perform a specific task, and to cooperate with other units. The advances of VLSI technologies and wireless sensor networks (WSN) turn the inspirational idea of intelligent home appliances into reality. In this paper, we(More)
Sensor networks inherit unique technical challenges such as limited battery capacity and very primitive computing capabilities. To prolong the lifetime of the wireless sensor networks, energy efficiency is one of the most critical issues. Many routing protocols are developed to address this issue from different aspects. Related routing protocols can be(More)
—Reducing the communication energy is essential to facilitate the growth of emerging mobile applications. In this paper, we introduce signal strength into location-based applications to reduce the energy consumption of mobile devices for data reception. First, we model the problem of data fetch scheduling, with the objective of minimizing the energy(More)
Reducing the communication energy is essential to facilitate the growth of emerging mobile applications. In this paper, we introduce signal strength into location-based applications to reduce the energy consumption of mobile devices for data reception. First, we model the problem of data fetch scheduling, with the objective of minimizing the energy required(More)
—Wireless Sensor Network (WSN) comprises of sensor nodes which are designed to sense the environment, transmit sensed data back to the base station via multi-hop routing to reconstruct physical phenomena. Since physical phenomena exists significant overlaps between temporal redundancy and spatial redundancy, it is necessary to use Redundancy Suppression(More)
Mobile devices, which are inherently of limited computing capabilities, face a growing demand to support increasingly complex applications. Computation offloading addresses this issue by enabling mobile devices to offload computations to a remote server. Advancing on previous work, this paper presents a cloud-based offloading service, which models an(More)