Fair and QoS-oriented resource management in heterogeneous networks

Abstract

In this paper, a heterogeneous network composed of femtocells deployed within a macrocell network is considered, and a quality-of-service (QoS)-oriented fairness metric which captures important characteristics of tiered network architectures is proposed. Using homogeneous Poisson processes, the sum capacities in such networks are expressed in closed form for co-channel, dedicated channel, and hybrid resource allocation methods. Then a resource splitting strategy that simultaneously considers capacity maximization, fairness constraints, and QoS constraints is proposed. Detailed computer simulations utilizing 3GPP simulation assumptions show that a hybrid allocation strategy with a well-designed resource split ratio enjoys the best cell-edge user performance, with minimal degradation in the sum throughput of macrocell users when compared with that of co-channel operation.

A Distributed Coverage Adjustment Algorithm for Femtocell Networks

“…has been widely used for resource allocation [18], [29]. Note that the value of JI changes between 1 and 1/N corresponding to best and worst case of fairness respectively.…”

Fair Resource Allocation With Interference Mitigation and Resource Reuse for LTE/LTE-A Femtocell Networks

“…Several recent studies [7]- [13] have investigated the shared spectrum approach for femtocell networks. In [7], the entire channel bandwidth is assigned to macrocell UEs (MUEs), while a portion of it is assigned to femtocell UEs (FUEs), the size of which is adjusted based on a spectrum splitting ratio. In addition, a max-min fair scheduler is used.…”

“…In general, the techniques proposed in [7]- [20] do not jointly consider interference, global fairness, resource utilization and complexity issues. Furthermore, most of these techniques are not designed to meet the QoS requirements of both GBR and non-GBR flows as defined in the LTE/LTE-A standard.…”

“…In the literature, resource allocation for femtocell networks has been intensively studied under the shared spectrum [7]- [13] and split spectrum [14]- [20] approaches. The shared spectrum approach allows the macrocell and femtocells to share the channel bandwidth.…”

“…When each HeNB receives the amount of resources it requires for its GBR and non-GBR flows, the resource allocation is said to be globally fair [1]. However, most of the related work in [7]- [17], [19], [20] only considered the GBR class. To ensure a high level of global fairness, it is crucial to ensure that each HeNB has its minimum resource demand satisfied for the GBR flows, and be provided with a fair amount of resources for the non-GBR flows.…”