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Sharing the licensed frequency spectrum among multiple mobile networkoperators (MNOs) is a promising approach to improve licensed spectrumutilization. In this paper, we model and analyze a non-orthogonal spectrumsharing system consisting of multiple seller and multiple buyer MNOs wherebuyer MNOs lease several licensed sub-bands from different seller MNOs. Allbase stations (BSs) owned by a buyer MNO can also utilize various licensedsub-bands simultaneously, which are also used by other buyer MNOs. To reducethe interference that a buyer MNO imposes on one seller MNO sharing itslicensed sub-band, this buyer MNO has a limitation on the maximum interferencecaused to the corresponding seller MNO's users. We assume each MNO owns its BSsand users whose locations are modeled as two independent homogeneous Poissonpoint processes. Applying stochastic geometry, we derive expressions for thedownlink signal-to-interference-plus-noise ratio coverage probability and theaverage rate of both seller and buyer networks. The numerical results validateour analysis with simulation and illustrate the effect of the maximuminterference threshold on the total sum-rate of the network.

Stochastic Geometry Analysis of Spectrum Sharing Among Multiple Seller and Buyer Mobile Operators