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The paper concerns a wireless sensor network (WSN) hosting multiple applications. The applications vary in terms of their resource requirements such as the number of sensors required by the applications and the location of the required sensors relative to a sink node. The requests for the various applications need to be scheduled in a manner so as to reduce the overall mean response time to the users...
During the last decade, we witnessed a rapid growth in deployment of pull-based P2P streaming applications. In these applications, each node selects some other nodes as its neighbors and requests streaming data from them. This scheme allows eliminating data redundancy and recovering from data loss, but it pushes the complexity to the receiver node side. In this paper, we theoretically study the scheduling...
The paper proposes a new PON architecture that applies an optical broadcast capable router (OBR) to route a wavelength to a set of selected PON branches and thus enables the transceivers in the central office (CO) to be shared among them. The OBR is built on fiber splitters and switching gates, and by controlling the gates the wavelengths at the inputs can reach any outputs of the OBR. Logical PONs...
In LTE-A (3GPP LTE-Advance) systems, CoMP (Cooperative Multi-Point) is adopted to enhance the performance of edge users. To maximize the edge user throughput, it is very crucial to properly determine the set of simultaneously served users in the same PRB (physical resource block) and cooperating BSs (base stations) for each selected user, as well as the transmit power of the BSs. In this paper, we...
LTE Advanced (LTE-A) small cells (pico cells) allow a smart densification of an existing macro cellular network. They are a means to cope with increasing traffic demands. They cover hotspots and support users in areas with otherwise bad service coverage. As they are surrounded by macro cells with a much higher TX power, higher antenna gain, and a much lower path loss, they offer a high transmission...
We investigate the problem of distributed scheduling and power control for vertical spectrum sharing in spatial-reuse time division multiple access (STDMA) networks. The objective is to minimize the transmission length (in term of time slots) of secondary users (e.g. users in femtocell networks) subject to the interference-limit constraint for primary users (e.g. users in cellular networks) and quality-of-service...
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