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Wireless Ad Hoc and Sensor Networks

Wireless Ad Hoc and Sensor Networks

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200 <strong>Wireless</strong> <strong>Ad</strong> <strong>Hoc</strong> <strong>and</strong> <strong>Sensor</strong> <strong>Networks</strong>2.5Total power of all nodes2Total power1.510.500 100 200 300 400 500 600 700IterationsFIGURE 5.17Total power with SCSD scheme.scheme (see Figure 5.17). Here a node, which is dropped, gets added tothe network after waiting for a period of “dormant time.” The optimalDPC scheme for this scenario results in an optimal selection of the gainvalue for each link as k 1 = 0.1654 <strong>and</strong> k 2 = 0.1330, whereas for the SSCDscheme the gains, k 1 = 0.3 <strong>and</strong> k 2 = 0.5, are selected after careful analysis.In both the cases, the new links are updated with k 1 = 0.1 <strong>and</strong> k 2 = 0.1.As seen from Figure 5.16 <strong>and</strong> Figure 5.17, the total power consumed byall transmitters is small for the optimal DPC scheme compared to theSSCD scheme.5.3 <strong>Ad</strong>mission Control of Users in a <strong>Wireless</strong> NetworkIn the previous section, transmitter power control is detailed for cellular<strong>and</strong> peer-to-peer networks. In this section, admission control of new usersis treated with DPC. Then the DPC/ALP with admission controller algorithmis presented in a unified manner.

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