Stochastic Geometry-Based Evaluation of Edge User QoS With Cooperative Allocation

Abstract

Long Term Evolution (LTE) frequency bands are being considered for use in 5G due to their coverage advantage. However, LTE usage is expected to be non-negligible for a while, so the amount of spectrum resources for it should be carefully estimated. In this letter, we propose a criterion for evaluating the adequacy of LTE spectrum resources in terms of edge user Quality of Service (QoS). For resource allocation to the edge user, we consider cooperative schemes that reflects the joint resource utilization of the associated and neighbor base stations. Based on stochastic geometry model, we derive semi-closed expressions of lower and upper bounds for the ergodic spectral efficiency at the edge user and devise a QoS satisfaction evaluation method through the decision region determined from them. Numerical analysis validates our derivations and shows the effect of joint resource utilization and cooperative allocations on QoS satisfaction.