Abstract
Sensors are deployed in a sensor network for the purpose of providing data about environmental phenomena to the sink node(s). As not all sensors may be able to transmit their data directly to the sink(s), sensors must also route other sensors’ data. Therefore, sensors must assume roles of both data provider and router. However, there are often many more sensors in the network than are needed at a given time to accomplish these tasks. Sensor management is needed to assign roles to each sensor, so that nodes that are not needed at a given time can enter a sleep state to save energy until they are needed, thereby extending network lifetime. The area of sensor management, as defined here, includes topology control--choosing which nodes should be routers to ensure a connected network—and sensing mode selection—choosing which nodes should sense data to meet application requirements (application QoS). It is possible to maximize network lifetime by finding optimal schedules of when each node should perform each function. However, these optimizations are computationally intensive, require global knowledge, and are not robust to changes in network topology. Therefore, there is a need for distributed, robust, and computationally efficient sensor management protocols that extend network lifetime while ensuring that application goals are met. In this chapter, protocols for both topology control and sensing mode selection are described and a qualitative comparison of these protocols is given.
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Perillo, M., Heinzelman, W. (2004). Sensor Management. In: Raghavendra, C.S., Sivalingam, K.M., Znati, T. (eds) Wireless Sensor Networks. Springer, Boston, MA. https://doi.org/10.1007/978-1-4020-7884-2_16
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DOI: https://doi.org/10.1007/978-1-4020-7884-2_16
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-387-35269-5
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