Performance Analysis of Asynchronous ABSF Configuration in Large-Scale Femtocell Networks

This paper investigates a combined macro and femtocell communications deployment where macro users suffer significant downlink interference from femtocells. Based upon the large-scale cellular network model using stochastic geometry, we analyze the performance of the asynchronous ABSF configuration, where femtocell independently reserves resource for the victim macro user based on the condition of intercell interference. The trade-off between reducing this interference (and thus improving coverage probability) versus maximising the available femtocell resources (overall network throughput) has been demonstrated. By comparing with the synchronous counterpart, we highlight the benefits of the asynchronous ABSF configuration in terms of the minimized femtocell resource expense for only a small compromise in coverage.