SOCP Approximation Based Resource Allocation in Shared Spectrum Access Communications

摘要

We consider the resource allocation (RA) optimization problem in shared spectrum access communications system, and propose efficient solutions for both inter-operator and intra-operator RA optimization problems. For inter-operator RA optimization, we present a spectrum sharing framework that primarily focuses on fairness issues for the spectrum sharing operators, by taking care of the sharing policy measures. For intra-operator RA, a joint subcarrier and power allocation scheme is considered for throughput maximization of a spectrum sharing operator employing exclusive assignment of subcarriers to its users under transmitting power constraint. Since the optimization problem is combinatorial with nonlinear constraints and has non-convex feasible regions, it is numerically very difficult to solve. We propose an efficient solution by linearizing and/or linearly approximating the nonlinear constraints, and by applying a transformation to a second order cone program form to handle the nonlinear objective function. The simulation results demonstrate the efficiency of the proposed solutions.