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需求的快速增长，运营商间通过资源共享提升链路质量的研究日益受到关注。然而，在分析运营商间资源共享效益时，共址这一关键因素常被忽视。在无线通信网络中，不同运营商常因成本效益考量而实施共址部署：将基站置于相同位置。为此，我们采用随机几何模型探究共址效应对资源共享效益的影响。研究发现共址因子与网络最优半径间存在复杂关联，证实共址确为必须考虑的重要因素。进一步分析共享预期收益的极限性质表明，当运营商规模不对等时，考虑共址因素后共享策略并非总能带来增益。