Subcarrier allocation in multi-cell OFDMA wireless networks with non-coherent base station cooperation and controllable fairness

Abstract

In this paper, a non-coherent base station cooperation (NC-BSC) scheme is examined for the downlink OFDMA wireless cellular networks. We formulate the resource allocation in the scheme as a subcarrier allocation optimization problem with equal power allocated on each subcarrier. To balance the tradeoff between system throughput and fairness, a multi-cell scenario controllable fairness is extended from single-cell scenario mentioned in [1], based on which the controllable global fairness (GF) scheme in the NC-BSC system is proposed. Two heuristic iterative algorithms are proposed to realize the subcarrier allocation in the NC-BSC system with and without the controllable fairness in a distributed manner. The performance is compared with traditional dynamic subcarrier allocation in noncooperative multi-cell networks. Simulation results show the performance enhancement through implementation of NC-BSC and the effectiveness of multi-cell controllable fairness in the NC-BSC system.

A Frequency Allocation Scheme with Controllable Fairness in FFR Aided OFDMA Networks

“…Jain's index is often used to measure the fairness among users [2], [7], [15]. However, its domain is [1/K, 1], which affected by the number of MSs.…”

“…To enhance celledge MSs' Quality of service (QoS) and increase system throughput, [5] and [6] give their solution, respectively. Cooperation among base stations (BSs) is discussed in [7].…”

“…The most common constraint of fairness is PF [13], it is applied into researches of resource allocation as a basic criterion [2], [14]. Some adjustment factors are also introduced into allocation policies [7] [15]. All the schemes above can either achieve fixed fairness index or limited flexibility, but none could reach a wide range controllability.…”

Availability Analysis and Optimization in CoMP and CA-enabled HetNets

“…In [28], a joint clustering and resource allocation problem for ultra dense cellular networks was solved using a twostep algorithm, which consists of the user-centric clustering based on load information and scheduling algorithm based on graphic coloring. In [29], the subcarrier allocation algorithm was proposed to satisfy both throughput and fairness. In [30], with the aim of maximizing the energy efficiency, the joint optimization on BS coordination, user scheduling, data rate adaption, and power allocation was solved via iterative algorithm.…”

Spectrum sharing in wireless cellular networks

“…Thus, the resource allocation in multi-cell scenario will be different, and generally more complex, compared with that in the single-cell scenario. Distinct from the resource allocation in multi-cell OFDMA networks [57,109,110] or CDMA networks [111,54,79], the resource allocation of OFDMA system which concurrently transmit as a secondary system should also consider the interference constraint to protect CDMA system.…”