Game Theory for Wireless Ad Hoc Networks

Game Theory for Wireless Ad Hoc Networks

Copyright: © 2014 |Pages: 16
DOI: 10.4018/978-1-4666-6050-2.ch004
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An ad hoc network typically refers to any set of networks where all devices have equal status on a network and are free to associate with any other ad hoc network device in link range. In particular, ad hoc network often refers to a mode of operation of IEEE 802.11 wireless networks. A wireless ad hoc network is a decentralized type of wireless network. The network is ad hoc because it does not rely on a pre-existing infrastructure, such as routers in wired networks or access points in managed (infrastructure) wireless networks. The decentralized nature of wireless ad hoc networks makes them suitable for a variety of applications where central nodes cannot be relied on and may improve the scalability of networks compared to wireless managed networks, though theoretical and practical limits to the overall capacity of such networks have been identified. This chapter explores this.
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Physical Layer

Power control is a hot issue of the physical layer due to the potentially significant performance gains achieved when nodes limit their power level. In wireless communication systems, mobile terminals respond to the time varying nature of the channel by regulating their transmitter powers. Specifically, in a CDMA system, where signals of other terminals can be modeled as interfering noise signals, the major goal of this regulation is to achieve a certain signal to interference (SIR) ratio regardless of the channel conditions while minimizing the interference due to terminal transmit power level. Hence, there are two major reasons for a terminal to perform power control; the first one is the limit on the energy available to the mobile node, and the second reason is the increase in quality of service (QoS) by minimizing the interference (Mehta, & Kwak, 2009).

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