The positioning methods based on received signal strength (RSS) measurements, link the RSS values to position of mobile station(MS) be located. Their accuracy depends suitability propagation models used for actual conditions. In indoor wireless networks, these conditions are very difficult predict due unwieldy and dynamic nature RSS. this paper, we present a novel method which dynamically estimates that best fit environments, by using only measurements obtained in real time. This is...

The dynamic and unpredictable characteristics of wireless channels in harsh environments have resulted a poor performance localization systems. Conventional implementations rely on unrealistic assumptions driven by tractability requirements, such as linear models or Gaussian errors. In this paper, we present framework for data fusion systems based determining likelihood functions that represent the relationship between measurements distances. framework, likelihoods are dynamically adapted to...

In recent years, the number of embedded computing devices connected to Internet has exponentially increased. At same time, new applications are becoming more complex and computationally demanding, which can be a problem for devices, especially when they battery powered. this context, concepts computation offloading edge computing, allow fully or partially offloaded executed on servers close in network, have arisen received increasing attention. Then, design algorithms make decision tasks...

A mobile station (MS) location can be estimated from the measurement of time arrival signals that travel between each base and MS. In this scenario, existence non-line-of-sight (NLOS) propagation paths has been considered to main drawback achieve high precision in positioning, since NLOS introduces large unpredictable errors estimates are obtained measurements. paper, we propose a new technique, called prior correction (PNMC), effectively correct measurements previous stage positioning...

We propose a cognitive Quality of Transmission (QoT) estimator for classifying lightpaths into high or low quality categories in impairment-aware wavelength-routed optical networks. The technique is based on Case-Based Reasoning (CBR), an artificial intelligence which solves new problems by exploiting previous experiences, are stored knowledge base. also show that including learning and forgetting techniques, the underlying base can be optimized, thus leading to significant reduction...

Abstract Personal exposure meters for assessing to RF electric or magnetic fields are subject errors associated with perturbations of the by presence human body. Although these alterations complex they not completely unpredictable. This article concludes that this error in a common worst‐case scenario could reach up 30 dB and therefore is concern assessment. We present several guidelines address issue useful insight into overall problem based on finite‐difference time‐domain simulations...

In this paper, a proportional-integral-derivative (PID) controller integrated with neural network (NN) is proposed to ensure quality of service (QoS) bandwidth requirements in passive optical networks (PONs). To the best our knowledge, first time an approach that implements NN tune PID deal QoS PONs used. contrast other tuning techniques such as Ziegler–Nichols or genetic algorithms (GA), proposal allows real-time adjustment parameters according conditions. Thus, new algorithm provides...

Elastic Optical Networks (EONs) are a promising optical technology to deal with the ever-increasing traffic and vast number of connected devices next generation Internet, associated paradigms like Internet Things (IoT), Tactile or Industry 4.0, name just few. In this kind network, each circuit lightpath is provisioned by means superchannels variable bandwidth. manner, only necessary bandwidth accommodate demand allocated, improving spectrum usage. When establishing connection, EON control...

In wireless location systems deployed in open areas, the statistical distributions of range estimates are very tractable. However, due to nature propagation urban and indoor environments, behavior such environments is different. Therefore, performance assessment results obtained for operating areas cannot be transferred ones realistic environments. this paper, systematic random errors (accuracy precision) dilution-of-precision (DOP) harsh derived two most common multilateration algorithms,...

Nowadays, a variety of information related to the distance between two wireless devices can be easily obtained. This paper presents hybrid localization scheme that combines received signal strength (RSS) and round-trip time (RTT) with aim improving previous schemes. The is based on an RSS ranging technique uses RTT estimates as constraints among other heuristic constraints. Once distances have been well estimated, position mobile station (MS) located estimated using new robust least-squared...

5G technologies promise to bring new network and service capacities are expected introduce significant architectural deployment transformations. The Cloud-Radio Access Networks (C-RAN) architecture, enabled by the combination of Software Defined Networking (SDN), Network Function Virtualization (NFV) Mobile Edge Computing (MEC) technologies, play a key role in development 5G. In this context, paper addresses problems Virtual Functions (VNF) provisioning (VNF-placement chain allocation)...

A novel quality of transmission (QoT) estimator based on support vector machines (SVM) is proposed for classifying optical connections (lightpaths) into high or low categories in impairment-aware wavelength-routed networks (WRONs). The performance the SVM-based evaluated a long haul communications network and compared to previous semi-analytical cognitive proposals. Results show that SVM approach significantly reduces necessary computing time estimate QoT given lightpath, critical aspect...

This paper presents a comprehensive location scheme in rich multipath environment. It is based on the estimation of distance between two wireless nodes line-of-sight (LOS) from best statistical estimator round-trip time (RTT), assuming linear regression as model that relates this to actual distance. As LOS cannot be guaranteed an indoor environment, efiect non-line-of-sight (NLOS) mitigated by two-step correction scheme. At flrst step, severe NLOS error corrected estimates applying prior

In this paper a proportional–integral–derivative (PID) controller to efficiently allocate bandwidth in high coverage passive optical networks (PONs) is presented. The novelty of proposal relies on the fact that first use PID control network parameter PONs. As takes into account present, past and possible future errors adjustment, self-adapting technique results very robust process. Simulation exhibit not only it faster more stable than other algorithms, but also auto-adapts resources when...

Abstract We developed the responsive environment AIM‐Mobile Learning Platform, which permits to assess students using smartphones and design online educational packets. carried out a qualitative quantitative study in Higher Education subjects case triangulation data methods. Results demonstrated that promotes dynamic learning‐teaching process inside class, increasing motivation, participation, attention of helping them be more conscious their self‐learning process.

The impact of physical layer impairments in optical network design and operation has received significant attention the last years, thereby requiring estimation techniques to predict quality transmission (QoT) connections before being established. In this paper, we report on experimental demonstration a case-based reasoning (CBR) technique whether channels fulfill QoT requirements, thus supporting impairment-aware networking. validation cognitive estimator is performed WDM 80 Gb/s PDM-QPSK...

In this paper, an analysis of the surface electric field on a human body based finite-difference time-domain simulations is presented. A statistical dosemeter interaction with has been made by means variations relative orientation from RF source. Variations source frequency have also made, comparing three different services FM, GSM-900 and DCS-1800. Three scenarios simulated where angle arrival main contribution impinges certain probability. Despite differences between scenarios, in strength...

The development of location techniques in urban and indoor environments by using measurements received signal strength (RSS) has as a main drawback the fact that such value RSS depends on many unpredictable changeable factors, not only actual distance between mobile station (MS) different base stations (BSs). With aim solving these limitations RSS-based systems, this paper we present novel technique to find out which model best describes propagations signals traveling MS BSs. This method...

The presence of (Non line Sight) NLOS propagation paths has been considered the main drawback for localization schemes to estimate position a (Mobile User) MU in an indoor environment. This paper presents comprehensive wireless system based on (Round-Trip Time) RTT measurements unmodified IEEE 802.11 network. It overcomes impairment by implementing (Prior Measurements Correction) PNMC technique. At first, are performed with novel electronic circuit avoiding need time synchronization between...

The success of location-based services in open areas, mainly driven by Global Navigation Satellite Systems (GNSS), has pushed the research community towards development robust systems that provide a similar localization accuracy harsh environments, where there is no line-of-sight (LOS) to satellites. Techniques based on time-of-arrival (TOA) measurements are most promising since they can offer an appropriate balance between and complexity. However, their performance commonly compromised...

Abstract A novel polling algorithm is proposed to provide subscriber differentiation at the upstream channel in long‐reach EPONs. As operators and service providers prefer operate loads with no congestion losses, developed has been designed improve efficiency for those which network likely work. This new scheme permits anticipate transmission of some packets order take advantage wasted bandwidth between consecutive transmissions ONUs. a result, not only does this behave alike other...

Next generation of Internet Things (IoT) services imposes stringent requirements to the future networks that current ones cannot fulfill. 5G is a technology born give response those requirements. However, deployment also accompanied by profound architectural changes in network, including introduction technologies like multi-access edge computing (MEC), software defined networking (SDN), and network function virtualization (NFV). In particular, NFV poses diverse challenges virtual (VNF)...