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The problem of the capacity of multi-channel interference-limited ad hoc networks with local frequency planning is examined in the transmission capacity framework. Bounds on outage and transmission capacity are given. If local frequency planning, i.e., frequency domain orthogonalization of neighbors in the communication range, is employed, transmission capacity can be significantly improved. The gain on the transmission capacity depends on the node density and is found to be a factor of 1.35 to 13 for a path loss attenuation α = 4 and outage probability greater than 0.01. A design insight is, that, if frequency planning in the communication range of nodes is employed, low node densities call for lower spectral efficiencies, while at high node densities higher spectral efficiencies increase the capacity of the network.
Date of Conference: 18-20 Oct. 2010