National Tsing Hua University Institutional Repository:Discrete Power Allocation for Lifetime Maximization in Cooperative Networks
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    NTHUR > Research & Development Office > Computer and Communication Research Center  > CCRC Technical Reports  >  Discrete Power Allocation for Lifetime Maximization in Cooperative Networks

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    Title: Discrete Power Allocation for Lifetime Maximization in Cooperative Networks
    Authors: Huang, Wan-Jen
    Hong, Yao-Win
    Kuo, C.-C. Jay
    Date: 2007
    Publisher: Institute of Electrical and Electronics Engineers Inc.
    Keywords: Discrete Power Allocation
    Lifetime Maximization
    Cooperative Networks
    Abstract: Discrete power allocation strategies for amplifyand- forward cooperative networks are proposed based on selective relaying methods. The goal of power allocation is to maximize the network lifetime, which is defined as the duration of time for which the outage probability at the destination can be maintained above a certain level. The discrete power levels enable a low cost implementation and a close integration with high speed digital circuits. We propose three power allocation strategies that take into consideration both the channel state information (CSI) and the residual energy information (REI) at each node. By modeling the residual energy of each node as the states of a Markov Chain, we are able to derive the network lifetime analytically by the expected number of transitions to the absorbing states, i.e., the energy states for which the outage probability is no longer achievable. The performance of the three strategies are compared through numerical simulations and a significant improvement in network lifetime is shown, when compared with the case considering only the local CSI.
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    Appears in Collections:[Computer and Communication Research Center ] CCRC Technical Reports
    [Institute of Communications Engineering] COM Conference Papers
    [Design Technology Center ] DTC Conference Papers

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