The dense deployment of small cells has been considered as a promising approach to providing high quality of service (QoS) to mobile users. However, the resulting dense short-range line-of-sight (LoS) links bring new challenges to interference management, because the interfering links from neighbouring cells are also likely to be in LoS, thus leading to a severe inter-cell interference. In this paper, we propose a user-centric base station (BS) clustering strategy for a non-coherent joint transmissions (JTs) in dense small-cell networks. The main idea is to cluster BSs in LoS with a user to serve it, by selecting the BSs with their LoS probabilities to such user above a predefined threshold. As a result, strong LoS links serve the user, while non-line-of-sight (NLoS) links interfere it. The proposed BS clustering strategy is then evaluated in four different communication environments, as specified by their corresponding path loss models. Our simulation results show that the coverage probability and spectrum efficiency achieved by the proposed user-centric BS clustering strategy increase with the BS density even at extremely high BS densities in all four considered environments.
The Effect of LoS and NLoS Transmissions on Base Station Clustering in Dense Small-Cell Networks
2019-09-01
304745 byte
Conference paper
Electronic Resource
English
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