Monica Karel Huerta - Profile on Academia.edu (original) (raw)

Papers by Monica Karel Huerta

IEEE Workshop on Local and Metropolitan Area Networks, 2004

Multicommodity network flows models are computationally challenging due to the large dimension of... more Multicommodity network flows models are computationally challenging due to the large dimension of real instances, as those from the fields of telecommunications specifically in multiprotocol label switching (MPLS). MPLS extends the IP destination based routing protocols to provide a new and scalable routing capabilities in connectionless networks using a relatively simple packet forwarding mechanism. MPLS networks carry traffic on virtual connections called label switched path (LSP). This paper considers the distributed D-LSP mechanism, each sub-LSP is set up on a different node-disjoint route. We propose an analytical method that allows minimizing the spare bandwidth using the optimization multicommodity flows technique, specifically applying the reformulation with path flows. The results show that there is an optimization of the spare bandwidth with distributed LSP mechanism in comparison with conventional LSP.

Resumen: En este artículo se propone un modelo de optimización que proporciona QoS en una red MPL... more Resumen: En este artículo se propone un modelo de optimización que proporciona QoS en una red MPLS mediante la minimización de la congestión en los LSP. Analizamos el modelo de asignación de capacidad y flujo (CFA) el cual no considera el tamaño del buffer para el cálculo del costo de las capacidades, está deficiencia la soluciona el modelo propuesto, al cual llamamos asignación de la capacidad del buffer (ACB). Las simulaciones indican que el modelo ACB soluciona el problema de asignación de flujos y capacidad en los LSP y mejora los valores de lo niveles de la congestión en cada enlace comparado con los modelos: general asignación de flujo (GFA) y optimización de la congestión del LSP (OCL).

Recent studies in Bioengineering show a great interest in telemedicine projects, it is motivated ... more Recent studies in Bioengineering show a great interest in telemedicine projects, it is motivated mainly for the fast communication technologies reached during the last decade. Since then many telemedicine projects in different areas have been pursued, among them the electrocardiographic monitoring, as well as methodological reports for the evaluation of these projects. In this work a methodology to evaluate an electrocardiographic telemonitoring system is presented. A procedure to verify the operation of Data Acquisition Module (DAM) of an electrocardiographic telemonitoring system is given, taking as reference defined standards, and procedures for the measurement of the Quality of Service (QoS) parameters required by the system in a Local Area Network (LAN). Finally a graphical model and protocols of evaluation are proposed.

In this paper we present a study for the optimization of the links utilization in several MPLS ne... more In this paper we present a study for the optimization of the links utilization in several MPLS network topologies. This information helps in determining the maximum link utilization required, which is a valuable knowledge in balancing load strategies in the network. We present mathematical models that tune the optimal parameters for strategically routing traffic in an MPLS network. We present the Optimal Link Utilization Model (OLUM) for different topologies. OLUM provides an approach that would result in optimally balanced link utilization. Finally we compare the results of the model with the interior point and simplex algorithms. Results show that the maximum link utilization required is minimized.

This paper presents a new strategy for burst reservation in OBS networks for the transport of IP/... more This paper presents a new strategy for burst reservation in OBS networks for the transport of IP/DiffServ traffics with Quality of Service (QoS) constraints using MPLS. The current resource reservation protocols research in OBS offer several algorithms for burst transmission, some of them taking into account QoS parameters. In this paper, these solutions will be shown according to the needs of IP/DiffServ/MPLS traffic. The main features of each strategy will be discussed and an enhanced algorithm proposed.

Telemedicine etworks should meet specific Quality of Service (QoS) requirements to guarantee that... more Telemedicine etworks should meet specific Quality of Service (QoS) requirements to guarantee that the users can work with the supported applications in a reliable manner. Therefore it must be verified that network resources satisfy these requirements especially in wireless networks, due to their channel characteristics: Communication over a wireless link often suffers from limited bandwidth, high error rates and interference from other users on the shared channel.

In the midterm future Near Field Communications (NFC) is expected to spread up within the healthc... more In the midterm future Near Field Communications (NFC) is expected to spread up within the healthcare sector. This article reviews the use of NFC in the healthcare sector. Application areas, use cases, potential benefits and barriers, will be presented. The present study provides guidance for researchers in adopting and deploying NFC in medical sector. The main healthcare and security applications are patient's identification and medication control. NFC can also be used in deploying resource control, management and data acquisition and remote delivery applications. The main benefits of NFC are: improvement of care quality, existence of standards and applications with friendly human interface. The main barriers are: limited availability of mobile phones with NFC, deployment costs, security, technology limitations and support of the health centre staff.

Developing of wireless personal mobile systems and home automation have been in the mind of scien... more Developing of wireless personal mobile systems and home automation have been in the mind of scientists and engineers for some decades. In recent years a huge variety of mobile systems that offer an increasing amount of applications for personal communication and productivity have been introduced in the market. That trend besides to the apparition of new sensors has allowed the developing of accessible personal telemedicine systems. This article proposes the developing of a Personal Monitoring and Alert System (spanish abbreviations SMyAP) for third age people. The goal of the system is to preserve the user independence, offering attention in emergencies produced for falls, abnormal or irregular bio-signals, etc. The SMyAP will be developed using open-source platforms and programming languages in new generation mobile systems.

It is thought that detailed neuron-models could lead to a better understanding of how the nervous... more It is thought that detailed neuron-models could lead to a better understanding of how the nervous system works. However, neural networks preserve their collective computational properties, regardless of the level of description used for modeling the main building block. In this paper, we built a Neuroid-based retina model. As a result of the implementation, the Neuroid was able to reproduce the essential features of the photoreceptor response to light. Likewise, the retina model responded to specific visual effects such as simultaneous contrast, Mach bands and Hermann grid. All of these suggest that the model comprises enough functional characteristics to provide us with a holistic comprehension of the fundamental features of large-scale neural networks.

IEEE International Caracas Conference on Devices, Circuits and Systems, 2004

Multicommodity network flows (MCNF) is a useful tool to solve bandwidth allocation and distributi... more Multicommodity network flows (MCNF) is a useful tool to solve bandwidth allocation and distribution problems on flows over MPLS (multiprotocol label switching) networks. MPLS has emerged as the protocol of the future due to it's true "multiprotocol architecture" nature, where it use a simple label switching mechanism and provide some level of quality of service (QoS) management features through traffic engineering. The objective of this paper is to propose a model based on multicommodity network flows theory to determine the optimal allocation of flows in a label switched path (LSP) at minimal cost. We discuss implementation issues and present some computational results.

IEEE Latin America Transactions, 2007

2012 Global Information Infrastructure and Networking Symposium (GIIS), 2012

Hybrid Wavelength Division Multiplexing-Passive Optical Networks (XDMA-WDM-PON) seems to be the s... more Hybrid Wavelength Division Multiplexing-Passive Optical Networks (XDMA-WDM-PON) seems to be the solution to tackle the requirements for optical access networks of the future. This article presents the trending for Next Generation Optical Access Networks (NG-OAN). In this work the requirements for optical access networks of the future are summarized in order to compare several XDMA-WDM-PON proposed solutions. Time

2013 IEEE Latin-America Conference on Communications, 2013

Wavelength Division Multiplexing-Orthogonal Frequency Division Multiple Access-based Passive Opti... more Wavelength Division Multiplexing-Orthogonal Frequency Division Multiple Access-based Passive Optical Network (WDM-OFDMA-PON) is accepted as one of the most suitable architectures to tackle the requirements for Next Generation Optical Access Networks (NG-OAN). The main technologies for the development of this architecture are the Digital Signal Processing (

2012 IEEE Latin-America Conference on Communications, 2012

Today, smartphones are being equipped with an important set of different sensors that could be us... more Today, smartphones are being equipped with an important set of different sensors that could be used to detect: sound, motion and location. This feature, in addition to the use of wireless communication networks are offering the possibility to build wireless sensor networks using smartphones as sensor nodes, in order to collect and transmit data from its surrounding environment. Unfortunately, by the nature of RF, wireless networks are disturbed by many factors, which could affect the devices communication and their ability to deliver collected data, such as signal attenuation and radio interferences. Because of these facts implementing a network of smartphones that use WiFi communication implies that devices should be situated, in a way that they can communicate with each other. To deal with this situation, there is a set of commonly used tools for the site survey process, among them are spectrum analyzers and packet sniffers to measure the RF signal range and to evaluate the potential for interferences. In this work, we implemented an traffic testbed that can help significantly during a site survey process, identifying if the communication between Android smartphones can be effectively reached, even though they have being placed distant from each other.

A design methodology for a pilot communications infrastructure to enable Telemedicine services in... more A design methodology for a pilot communications infrastructure to enable Telemedicine services in ambulatory primary health care centers located within "Baruta" and "El Hatillo" municipalities in Venezuela's Miranda state. The main purpose of the proposed infrastructure is to provide voice and data network connectivity between these primary care centers and a chief facility, a local major hospital. The design of the infrastructure was based on a prior assessment of the physical infrastructure and medical resources available at the ambulatory centers, as well as the characteristics of their surroundings. A wireless IEEE 802.11 technology was chosen as being the most adequate for this particular application, after having considered several other alternatives. Features such as technical adequacy, ease and cost of installation and operation, etc., were used as selection criteria. The design included both physical and logical aspects of the infrastructure. The design's performance was analyzed under the simultaneous use of different applications regarding quality of service, bandwidth, and delay parameters.

… Conference on Telematics …, 2006

In this paper we introduce a novel computational neuron-model, the Neuroid, which is based on thr... more In this paper we introduce a novel computational
neuron-model, the Neuroid, which is based on three basic
operations that are carried out by nerve cells to process the
incoming information, such as comparison, and frequency
pulse modulation-demodulation. The model was implemented
using LabVIEW 10.0, in order to assign to each of these
operations, an execution block (Virtual Instrument). The
results of its implementation showed a very similar behavior to
that exhibited by real neurons. Furthermore, due to its
simplicity and low computational requirements, it is expected
that the Neuroid can be used to create several software models of biological neural systems, either for research or teaching purposes.

IEEE Workshop on Local and Metropolitan Area Networks, 2004

IEEE International Caracas Conference on Devices, Circuits and Systems, 2004

IEEE Latin America Transactions, 2007

2012 Global Information Infrastructure and Networking Symposium (GIIS), 2012

2013 IEEE Latin-America Conference on Communications, 2013

2012 IEEE Latin-America Conference on Communications, 2012

… Conference on Telematics …, 2006