With more and more demand from devices to use wireless communication networks, there has been an increased interest in resource sharing among operators, to give a better link quality. However, in the analysis of the benefits of resource sharing among these operators, the important factor of co-location is often overlooked. Indeed, often in wireless communication networks, different operators co-locate: they place their base stations at the same locations due to cost efficiency. We therefore use stochastic geometry to investigate the effect of co-location on the benefits of resource sharing. We develop an intricate relation between the co-location factor and the optimal radius to operate the network, which shows that indeed co-location is an important factor to take into account. We also investigate the limiting behavior of the expected gains of sharing, and find that for unequal operators, sharing may not always be beneficial when taking co-location into account.

翻译：随着设备对无线通信网络的需求日益增长，运营商间资源共享以提升链路质量的研究备受关注。然而在分析运营商间资源共享的收益时，共址这一重要因素常被忽略。事实上，在无线通信网络中，不同运营商常因成本效益而采用共址部署：即将其基站置于相同位置。为此，我们利用随机几何方法探究共址对资源共享收益的影响，并揭示了共址因子与网络最优运行半径之间的复杂关系，这表明共址确实是一个需要重点考量的因素。我们还研究了共享期望收益的极限行为，发现当运营商规模不对等时，若考虑共址因素，资源共享未必总是有益的。