Abstract
r The first layer in the OSI reference model is the physical layer, as shown in Fig. 2.1. The physical layer specifies the communication media, the type of energy used for communication, and the mapping of information bits to energy. A transmitter can send a signal through a variety of physical media, including wires, air, and water. Several communication technologies that use different energy types for encoding information also exist, such as radio frequency waves, microwave, infrared, ultra wide band radio, and acoustics. In this chapter, we briefly explore the communication media and technology possibilities for ad hoc and sensor networks.
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© 2007 Springer Science+Business Media, LLC
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(2007). Physical Layer. In: Wireless Ad Hoc and Sensor Networks. Springer Series on Signals and Communication Technology. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39023-9_2
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DOI: https://doi.org/10.1007/978-0-387-39023-9_2
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-387-39022-2
Online ISBN: 978-0-387-39023-9
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