2019/01/14 by Anastasios Papazafeiropoulos, Papazafeiropoulos, Anastasios, Pandelis Kourtessis +7
Computer Science · Engineering · #Advanced MIMO Systems Optimization #Cooperative Communication and Network Coding #Energy Harvesting in Wireless Networks #FOS: Computer and information sciences #Information Theory (cs.IT)
paper · pdf · doi:10.48550/arxiv.1901.04280
openalex publication_date 2019/01/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Small-cell densification is a strategy enabling the offloading of users from\nmacro base stations (MBSs), in order to alleviate their load and increase the\ncoverage, especially, for cell-edge users. In parallel, as the network\nincreases in density, the BS cooperation emerges as an efficient design method\ntowards the demands for drastic improvement of the system performance against\nthe detrimental overall interference. In addition, the tiers are enhanced with\ncell association policies by introducing the concept of the association\nprobability. Above this and motivated by the advantages of cooperation among\nBSs, the small base stations (SBSs) are enriched with this property in their\ndesign. SBS cooperation allows shedding light into its impact on the cell\nselection rules in multi-antenna HetNets. Under these settings,\nsoftware-defined networking (SDN) is introduced smoothly to play the leading\nrole in the orchestration of the network. In particular, heavy operations such\nas the coordination and the cell association are undertaken by virtue of an SDN\ncontroller performing and managing efficiently the corresponding computations\ndue to its centralized adaptability and dynamicity towards the enhancement and\npotential scalability of the network. In this context, we derive the coverage\nprobability and the mean achievable rate. Not only we show the outperformance\nof BS cooperation over uncoordinated BSs, but we also demonstrate that the SBS\ncooperation enables the admittance of more users from the macro-cell BSs\n(MBSs). Moreover, we investigate the performance of different transmission\ntechniques, and we identify the optimal bias in each case when SBSs cooperate.\nFinally, we depict that the SBS densification is beneficial until a specific\ndensity value since a further increase does not increase the coverage\nprobability.\n