A Stochastic Geometry Framework for Analyzing Pairwise-Cooperative Cellular Networks

作者：Baccelli Francois^*; Giovanidis Anastasios

来源：IEEE Transactions on Wireless Communications, 2015, 14(2): 794-808.

DOI：10.1109/TWC.2014.2360196

• Cellular networks
• cooperative communications
• CoMP
• coverage probability
• stochastic geometry

Cooperation in cellular networks is a promising scheme to improve system performance, especially for cell-edge users. In this work, stochastic geometry is used to analyze cooperation models where the positions of base stations follow a Poisson point process distribution and where Voronoi cells define the planar areas associated with them. For the service of each user, either one or two base stations are involved. If two, these cooperate by exchange of user data and channel related information with conferencing over some backhaul link. Our framework generally allows for variable levels of channel information at the transmitters. This paper is focused on a case of limited information based on Willems' encoding. The total per-user transmission power is split between the two transmitters and a common message is encoded. The decision for a user to choose service with or without cooperation is directed by a family of geometric policies, depending on its relative position to its two closest base stations. An exact expression of the network coverage probability is derived. Numerical evaluation shows average coverage benefits of up to 17% compared to the non-cooperative case. Various other network problems of cellular cooperation, like the fully adaptive case, can be analyzed within our framework.

• 出版日期2015-2