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In this paper, we consider the use of device-to-device (D2D) communications for extending the coverage area of active base stations in the case of public safety communications with partial coverage. A 3GPP standard compliant system level simulator is developed for D2D and heterogeneous network (HetNet) technologies considering public safety scenarios. The simulator is used to evaluate the performance...
The use of small cell deployments in heterogeneous network (HetNet) environments is expected to be a key feature of 4G networks and beyond, and essential for providing higher user throughput and cell-edge coverage. However, due to different coverage sizes of macro and pico base stations (BSs), such a paradigm shift introduces additional requirements and challenges in dense networks. Among these challenges...
Heterogeneous networks (HetNets) are expected to be a key feature of long-term evolution (LTE)-advanced networks and beyond and are essential for providing ubiquitous broadband user throughput. However, due to different coverage ranges of base stations (BSs) in HetNets, the handover performance of a user equipment (UE) may be significantly degraded, especially in scenarios where high-velocity UE traverse...
The time domain inter-cell interference coordination (eICIC) mechanism specified in LTE Rel. 10 improves the throughput of picocell-edge users by protecting them from macrocell interference. On the other hand, it also degrades the aggregate capacity in macrocell because the macro base station (MBS) does not transmit data during the coordinated subframes (CSFs). The MBS data transmission at a reduced...
Device-to-device (D2D) communication enables mobile devices to directly communicate with each other without the help of infrastructure and to reuse radio resources within cellular networks. When D2D user equipments (UEs) use the same radio resources for discovery and communication as the cellular network, intercell interference (ICI) may degrade the D2D discovery performance. Therefore, ICI between...
The use of reduced power subframes in LTE Rel. 11 can improve the capacity of heterogeneous networks (HetNets) while also providing interference coordination to the picocell-edge users. However, in order to obtain maximum benefits from the reduced power subframes, setting the key system parameters, such as the amount of power reduction, carries critical importance. Using stochastic geometry, this...
Poisson Point Process (PPP) models provide important insights for the analysis of heterogeneous networks (HetNets). Recently, several theoretical results which investigate the outage and the capacity of HetNets have been developed based on PPPs. The goal of the present paper is to provide exact analytical expressions for the capacity of range expanded and interference coordinated HetNets, and validate...
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