A Frequency Reuse Technique for MANET Networks

In MANET networks, the frequency spectrum is a scarce commodity, requiring implementation of efficient resource management techniques like power management, efficient adaptive modulation and coding schemes, and especially Frequency Reuse (FR). FR is the simultaneous use of the frequency channels in a given geographical area of operation to increase the subnet capacity and improve the spectral efficiency. For a typical scenario, such as commercial or military network application, FR channel allocation presents a number of challenges, including the following: ¿ Multiple transceiver antennae mounted on a confined vehicular platform cause inadequate RF separation. ¿ A dense subnet condition introduces additional noise. ¿ Rapid environmental and terrain changes within the subnet create network "holes" as well as hotspots. ¿ High spectrum demand due to adverse battlefield. In this paper, we propose an algorithm that is empirically based (with historical data) in conjunction with a dynamic measurement-based procedure to address FR. The algorithm shows a way to estimate the separation distance between the clusters and/or subnets necessary for FR The paper starts with a spectrum allocation scheme that is used to derive channels for its waveforms, the subnets and their regions. Then it describes the importance of management of slots for each channel by individual nodes to enhance FR. Next we discuss the theoretical construct that is used for instituting the FR Process. Finally the theoretical construct of FR is validated by using a simulation.