Heinz Droste

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We report on field trials using CoMP transmission in the downlink of a mobile radio network. Two new features enable over-the-air CoMP transmission from physically separated base stations and terminals. These are distributed synchronization and a fast virtual local area network. Using VLAN tags, terminals feed back the multi-cell channel state information(More)
OBJECTIVE To investigate the value of coronary pressure derived fractional flow reserve (FFR) measurements in supporting decisions about medical or surgical treatment in patients with angiographically equivocal left main coronary artery stenosis. DESIGN A two centre prospective single cohort follow up study. INTERVENTIONS FFR of the left main coronary(More)
As a chain is as strong as its weakest element, so are the efficiency, flexibility, and robustness of a mobile network, which relies on a range of different functional elements and mechanisms. Indeed, the mobile network architecture needs particular attention when discussing the evolution of 3GPP EPS because it is the architecture that integrates the many(More)
Heterogeneous cellular networks (HetNets), where lowpower base-stations are overlaid with conventional macro base-stations, is a promising technique to improve coverage and capacity of the macroonly networks. To realize the potential benefits of HetNets, it is crucial to jointly optimize the user association, channel assignment, beamforming and power(More)
In current cellular networks base stations (BSs) usually perform independent scheduling without coordinating the resource allocation among different cells. This, however, often leads to high interference levels in cellular networks operating with universal frequency reuse, such as the 3GPP UTRAN Long Term Evolution (LTE). Coordinated scheduling between(More)
The METIS project is laying the foundation of 5G mobile and wireless communication systems putting together the point of view of vendors, operators, third party players and academia. In particular, METIS is developing and evaluating the key technology components of 5G systems. In this framework, a new mobile and wireless network architecture is required to(More)
During the last two years, the METIS project (“Mobile and wireless communications Enablers for the Twentytwenty Information Society”) has been conducting research on 5G-enabling technology components. This paper provides a summary of METIS work on 5G architectures. The architecture description is presented from different viewpoints. First, a functional(More)
Although the range expansion and inter-cell interference coordination (ICIC) have been shown to successfully enhance the capacity and load balancing in the heterogeneous network (HetNet), their impacts on the handover performance are not fully understood in existing studies. In this paper, a novel measurement-based approach is adopted to investigate these(More)