Dynamic Frequency Resource Allocation in Heterogeneous Cellular Networks

Abstract—Deployment of low power pico basestations within
cellular networks can potentially increase both capacity and
coverage. However, such deployments require efficient frequency
allocation schemes for managing interference from the pico and
macro basestations that are located within each other’s transmission
range. Partitioning the available frequencies between the
various basestations avoids the problem of interference, but can
lead to inefficient spectrum usage.
In this paper, we introduce a distributed frequency allocation
scheme that shares frequencies between macro and pico basestations,
and guarantees a minimum average throughput to users.
The scheme seeks to minimize the total number of frequencies
needed to honor the minimum throughput requirements. We
evaluate our scheme using detailed simulations and show that
it performs on par with the centralized optimum allocation.
Moreover, our proposed scheme outperforms a static frequency
reuse scheme and the centralized optimal partitioning between
the macro and picos.

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