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Energy conservation is the key factor driving the trend toward green next-generation wireless networks. Existing studies have shown that cooperative communications can significantly reduce energy consumption. Most of these studies simplistically assume that all of the nodes in the network will cooperatively transmit. However, in practice, nodes may not always be altruistic and reject collaboration...
This paper describes our strategy to operate WSN with or without security based on our measurements of energy consumption using CrossBow and Ember sensor nodes. It was found that the node microcontroller's CPU operates for substantially longer times for both hashing and encryption operations compared to the time for handling messages without any security. However, the associated overall increased...
In demand of more computing power and less energy use, multiprocessor with power management facility emerges in embedded system design. Dynamic voltage scaling is such a facility that varies clock speed and supply voltage to save more energy. In this paper, we propose ETAHM to allocate tasks on a target multiprocessor system. In pursuit of global optimal solution, it mixes task scheduling, mapping...
WSN nodes are usually powered by batteries. Energy consumption during node operation determines battery life. Power consumption depends on the different hardware and software components in a WSN node and their various activities. In order to determine the life of the battery, we must measure the energy consumption of a node that is active in a network. That is, we must know the power consumption and...
Both correct transmission using hashing and protection of messages using encryption in sensor nodes require additional energy. This paper describes our measurement results for energy consumption in CrossBow and Ember sensor nodes for the process of exchanging data messages between nodes both in the clear and in a protected form. Full strength algorithms were loaded into and executed in nodes. It was...
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