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We propose a Q-Learning-based algorithm for an HTTP Adaptive Streaming (HAS) Client that maximizes the perceived quality, taking into account the relation between the estimated bandwidth and the qualities and penalizing the freezes. The results will show that it produces an optimal control as other approaches do, but keeping the adaptiveness.
Ultra-wideband (UWB) technology is very popular in indoor localization due to its high accuracy, which can lead to enhanced user experience in indoor motion gaming. In this paper, we introduce results of empirical measurement and modeling of the statistics of localization error in a typical indoor motion gaming scenario. Both time of arrival (TOA) and received signal strength (RSS) estimations are...
This paper presents a characteristic expression to determine the effective bandwidth of broadband wavefields observed over a source-free finite spherical region. To address this topic, for given constraints on size of the observation region and bandwidth, we characterize the observable wavefield using modal expansion of wave propagation in 3D. When signals are transmitted to a spatially constrained...
Physical-layer network coding (PNC) can significantly improve the throughput of wireless communication systems by exploiting signal superimposition at relays. It is practically challenging to achieve symbol alignment in PNC. In this paper, we study the impact of the signal power loss and the inter-symbol-interference (ISI) on the system performance when the symbols are not aligned. We show that when...
In this paper, we propose a client-based adaptation method for Adaptive Streaming over HTTP/2 leveraging the server push feature. A cost function that takes into account both the number of pushed segments and the playout buffer level is defined. Experiment results show that the proposed method can improve the tradeoff between the number of requests and buffer stability compared to existing solutions.
This paper is concerned with the optimal association of user equipments (UEs) to the base stations, which are either a macro base station or pico base stations, for the sum rate utility in a cooperative heterogeneous network (HetNet). This is a nonconvex combinatorial problem. By recasting the problem as a d.c (difference of convex (d.c.)) program, the optimal association solution is sought by d.c...
Filter banks are often used in the analysis and the synthesis of signals. By using cascade or parallel connected filters, multi-resolution analysis of a signal in different sub-bands is possible. A method based on the filter banks using discrete prolate spheroidal sequences (DPSS) is proposed in this paper. DPSS are solutions to an energy maximization problem in a limited bandwidth context; their...
The time-varying landscape of spectral congestion is driving the investigation into new forms of “spectrally aware” radar emissions based on passive sensing of the environment. The recent Pseudo-Random Optimized FMCW (PRO-FMCW) framework, which can be viewed as an instantiation of FM noise radar, generates a nonlinear FMCW waveform that does not repeat and is designed using spectrally shaped optimization...
In recent years most Internet Service Providers (ISPs) have come across one of the important problems. That is, how to manage automatic adjustment of the bandwidth in the field of Virtual Private Networks (VPNs).One solution, is a model called Autonomic Service Architecture (ASA), which can manage the bandwidth allocation for individual customers. Nevertheless, this model has two main drawbacks. One...
Schemes to reconstruct signals defined in the nodes of a graph are proposed. Our focus is on reconstructing bandlimited graph signals, which are signals that admit a sparse representation in a frequency domain related to the structure of the graph. The schemes, which are designed within the framework of linear shift-invariant graph filters, consider that the signal is injected at a single seeding...
In this paper we present a novel message forwarding algorithm, the reachability matrix algorithm, for V2V communication in a platooning scenario. The algorithm uses a communication quality estimate to determine appropriate forwarding candidates. We show that the algorithm achieve a higher reliability in the communication compared to only using broadcast but still keeping the message intensity at a...
We are witnessing a considerable amount of research work related to data center and cloud infrastructures but evaluations are often limited to small-scale scenarios as very few researchers have access to a real infrastructure to confront their ideas to reality. In this demo we will reveal our experiment automation tool, DiG (Data centers in the Grid), which explicitly allocates physical resources...
This paper describes a multi-path Hall sensor intended for wide-bandwidth current sensing. The spinning-current technique and on-chip ripple reduction loops are used to suppress the offset and spinning ripple, respectively, of a set of Hall sensors in a low frequency path. More bandwidth is achieved by combining this path with a high frequency path consisting of a second set of non-spun Hall sensors...
When applying updates on distributed network elements with SDN, intra-update states may violate desired network properties, such as drop- and loop-freeness. Current stateless approaches cannot guarantee the constancy of arbitrary network invariants (correctness) in general, yet update procedures guaranteeing certain invariants do exist. In this paper, we investigate on update consistency for the case...
The article deals with the problem of controlling the flow of information coming from a group of unmanned aerial vehicles by radio channel. The stream is a sequence of binary information packages. The inevitable data losses compensated by repetition of lost packages. Modern methods control of data flow assumes using a mechanism automatic repetition query based on the method of sliding window. In this...
We use some simple techniques to derive a universal alphabet-size dependent bound on the parameters of erasure-correcting regenerating codes. It can be shown that the well-known previous bounds are special cases of our more general bound. In certain cases our bound leads to improvement over prior results.
We consider distributed storage (DS) for a wireless network where mobile devices arrive and depart according to a Poisson random process. Content is stored in a number of mobile devices, using an erasure correcting code. When requesting a piece of content, a user retrieves the content from the mobile devices using device-to-device communication or, if not possible, from the base station (BS), at the...
Virtual private networks (VPNs) are now practically the only mean of establishing secure data exchange via the public networks (Internet). The problem of designing a virtual private network is to determine the required number of VPN channels, connecting the fragments of the distributed network infrastructure to each other. However, if the number of fragments is great, this problem becomes rather complex...
Mobile traffic is increasing exponentially year by year and it will be over 1000 times higher than that of today in the near future. In order to tackle this matter, millimeter wave mobile access networks which can provide several GHz bandwidth attract international attention. This paper investigates the candidates of millimeter wave spectrum for 5G by referring to several ongoing 5G R&D projects...
Frequency Spectrum is a non-renewable limited radio resource and therefore every effort has been made to efficiently utilize the spectrum. In LTE Release 10, 3GPP introduced carrier aggregation as a key enabler to meet the requirements set by IMT-Advanced by combining component carriers and have an aggregated bandwidth of up to 100 MHz. Further enhancements in LTE Rel. 11 and 12 have been introduced...
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