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- W1550719682 abstract "With advance in technology, sensor networks composed of small and cost effective sensing devices equipped with wireless radio transceiver for environment monitoring have become feasible. The key advantage of using these small devices to monitor the environment is that it does not require infrastructure such as electric mains for power supply and wired lines for Internet connections to collect data, nor need human interaction while deploying. These sensor nodes can monitor the environment by collecting information from their surroundings, and work cooperatively to send the data to a base station, or sink, for analysis. However, currently there are two limitations on these sensor nodes. First, the power supply is limited. Without electric infrastructure, the nodes are powered by batteries. Once the batteries run out of energy, the nodes die. Battery replacement is not economic, and sometimes infeasible. The sensor nodes will be very cheap once they are mass production products. Deploying new sensor nodes will be more economic than human power. Sometimes the sensor network may be deployed in a hostile or unreachable environment, such as a battle field or chemical waste disposal, and therefore it is not possible for a human to replace a depleted battery. Second, the bandwidth of the radio transceiver is limited. Unlike the current 802.11 wireless LAN which can reach up to 54Mbps, current radio transceivers of these sensor nodes can only reach to a few hundreds Kbps, and some only have 30 ∼ 40 Kbps. Therefore the amount of data that can be transmitted within the sensor network is limited. To reduce energy consumption and traffic load of a sensor network, the amount of the data transmitted in the network must be reduced. Consider the dynamics of a sensor network. It collects data from its surrounding environment. This data is usually highly correlated within the sensor’s area, thus the data collected by sensor nodes close to each other is usually closely related. Temperature readings, for example, are usually the same from each of a cluster of sensors. If every node transmits its sensed data to the sink, these multiple packets will contain duplicate readings. Also, for applications that ask only for averages, sums or total counts from sensor nodes," @default.
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- W1550719682 date "2008-01-01" @default.
- W1550719682 modified "2023-10-16" @default.
- W1550719682 title "Data Aggregation in Wireless Sensor Networks" @default.
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- W1550719682 doi "https://doi.org/10.1007/978-0-387-49592-7_13" @default.
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