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Increasing bandwidth demand from mobile Internet applications and the existence of 2G, 3G and soon 4G equipment in operators' networks forces them to implement an efficient resource management over all available radio access technologies. While such a multi-radio management will certainly improve resource utilization and allows reducing local hot spots, it comes at the cost of additional signaling...
An Orthogonal Frequency Division Multiple Access (OFDMA) based radio-interface is specified by 3GPP for LTE system. OFDMA provides efficient spectral efficiency by reusing complete frequency band in all cells. However it projects high inter cell interference (ICI) especially on cell borders. ICI not only minimizes the cell border throughput but also effects on the handover performance in LTE. Hard...
In this paper we cover the problem of resource allocation in terms of optimum air-interface and cell selection in cellular, heterogeneous multi-air-interface scenarios. For a given set of voice users with minimum quality of service requirements and a set of best effort users we find the optimum allocation that guarantees service for the voice users and maximizes the sum utility of the best effort...
Recent simulation studies of heterogeneous wireless networks have shown promising system performance improvements by using multi standard radio resource management (MxRRM) with a centralised MxRRM architecture. In the present paper, the distributed MxRRM architecture is studied, including the modelling of signalling, where intersystem cell load information can only be exchanged at certain events....
A collaborative multimedia environment (CME) allows users to works remotely on common projects by sharing applications (e.g. CAD tools, text editors, white boards) and simultaneously communicate audiovisually. Several dedicated applications (e.g. MBone tools) exist for transmitting video, audio and data between users. Due to the fact that they have been developed for the Internet, which does not provide...
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