Buffer capacity allocation: a method to QoS support on MPLS networks

This paper describes an optimized model to support QoS by mean of Congestion minimization on LSPs (Label Switching Path). In order to perform this model, we start from a CFA (Capacity and Flow Allocation) model. As this model does not consider the buffer size to calculate the capacity cost, our model- named BCA (Buffer Capacity Allocation)- take into account this issue and it improve the CFA performance. To test our proposal, we perform several simulations; results show that BCA model minimizes LSP congestion and uniformly distributes flows on the network.Keywords: MPLS, QOS, Buffer allocation

Fuzzy system of irrigation applied to the growth of Habanero Pepper (Capsicum chinense Jacq.) under protected conditions in Yucatan, Mexico

Agriculture is the largest user of water worldwide by using about 70 percent of total consumption. The world food production depends on the availability of water, considering factors such as demographic and climate change, so the use of efficient irrigation is necessary to apply the correct amount of water to crops. The traditional irrigation systems generally program their scheme based on measurements made at Class A evaporimeter pan. In this paper an irrigation scheme defined by an algorithm that automates the amount of water supplied is presented, it considers the consumption of habanero pepper crop, and a fuzzy system evaluates the necessary duration of irrigation. The climatic variables considered are temperature, relative humidity, and soil moisture. The algorithm was programmed in a microcontroller Atmel 328p included in Arduino platform, with the addition of a ZigBee wireless system that allows for monitoring through a PC. The climatic variables were inserted into the fuzzy system by sets of trapezoidal and triangular form and a Mamdani type inference mechanism in which the knowledge of an expert is registered through the fuzzy rules. The system was applied to a habanero pepper crop at Conkal Institute of Technology in Yucatan, Mexico.Peer ReviewedPostprint (published version

SOPORTE DE QOS SOBRE IPV6 CON INTSERV6

RESUMEN. Este documento propone una solución para soportar Calidad del Servicio extremo a extremo en una Internet que trabaja con IPv6. Esta propuesta se conoce como IntServ6 y utiliza las etiquetas de flujo de IPv6 para mejorar el desempeño en el proceso de clasificación de paquetes de los Routers IntServ. Para la evaluación de nuestra propuesta, se compara su mecanismo de clasificación de paquetes con sus equivalentes en tecnologías como IntServyMPLS mediante simulaciones. El modelo obtenido está basado en un modelo desarrollado en [18] que originalmente no contiene el efecto de las colisiones presentadas en la clasificación, el cual se debe al uso de una función hash para obtener el identificador de los flujos en IntServ. En este artículo se agrega el efecto mencionado a dicho modelo y, una vez hecha esta modificación se contrasta el resultado con un modelo obtenido para IntServ6. Como resultado del uso de etiquetas de flujo de IPv6 para identificar los flujos, se obtiene una solución con grandes ventajas como la mejora de las prestaciones de los routers IntServ, además funciona sobre una Internet IPv6, también explota los recursos que ofrece IPv6 para el manejo de Calidad del Servicio y, a su vez, ofrece un fácil mapeo de flujos con Calidad de Servicio de una red de acceso IPv6 en los flujos de una red de transporte MPLS. PALABRAS CLAVE Ipv6,Quality of Service, Router architecture, Label switching, IntServ, MPLS.  ABSTRACT This paper proposes an approach to support End-to-End Quality of Service over IPv6 networks. In this approach, named IntServ6, IPv6 flow labels are used to give better performance into the process of packet classification into IntServ network routers. In order to evaluate our proposal, a router model for IntServ6 is obtained and it is compared with other technologies as IntServ and MPLS. The models described here are obtained having a model developed in [18] as starting point. However, this model does not include an important collision effect due to the use of hashing function to obtain flow identifiers in IntServ. In this paper, we add this effect to the model of IntServ. The IntServ modified model and MPLS model are compared with the model obtained for IntServ6. As result of the use of IPv6 flow labels to identify the flows in an IntServ network, we obtain a solution with benefits as better performance in IntServ routers due to label switching, Quality of Service support in IPv6 networks, and the use of IPv6 resources created for QoS support and not used yet. Additionally, this solution allows to its flows could be easily mapped to MPLS transport networks due to the use of the same size flow label. KEYWORDS Ipv6,Quality of Service, Router architecture, Label switching, IntServ, MPLS.  

SOPORTE DE QOS SOBRE IPV6 CON INTSERV6

RESUMEN. Este documento propone una solución para soportar Calidad del Servicio extremo a extremo en una Internet que trabaja con IPv6. Esta propuesta se conoce como IntServ6 y utiliza las etiquetas de flujo de IPv6 para mejorar el desempeño en el proceso de clasificación de paquetes de los Routers IntServ. Para la evaluación de nuestra propuesta, se compara su mecanismo de clasificación de paquetes con sus equivalentes en tecnologías como IntServyMPLS mediante simulaciones. El modelo obtenido está basado en un modelo desarrollado en [18] que originalmente no contiene el efecto de las colisiones presentadas en la clasificación, el cual se debe al uso de una función hash para obtener el identificador de los flujos en IntServ. En este artículo se agrega el efecto mencionado a dicho modelo y, una vez hecha esta modificación se contrasta el resultado con un modelo obtenido para IntServ6. Como resultado del uso de etiquetas de flujo de IPv6 para identificar los flujos, se obtiene una solución con grandes ventajas como la mejora de las prestaciones de los routers IntServ, además funciona sobre una Internet IPv6, también explota los recursos que ofrece IPv6 para el manejo de Calidad del Servicio y, a su vez, ofrece un fácil mapeo de flujos con Calidad de Servicio de una red de acceso IPv6 en los flujos de una red de transporte MPLS. PALABRAS CLAVE Ipv6,Quality of Service, Router architecture, Label switching, IntServ, MPLS.  ABSTRACT This paper proposes an approach to support End-to-End Quality of Service over IPv6 networks. In this approach, named IntServ6, IPv6 flow labels are used to give better performance into the process of packet classification into IntServ network routers. In order to evaluate our proposal, a router model for IntServ6 is obtained and it is compared with other technologies as IntServ and MPLS. The models described here are obtained having a model developed in [18] as starting point. However, this model does not include an important collision effect due to the use of hashing function to obtain flow identifiers in IntServ. In this paper, we add this effect to the model of IntServ. The IntServ modified model and MPLS model are compared with the model obtained for IntServ6. As result of the use of IPv6 flow labels to identify the flows in an IntServ network, we obtain a solution with benefits as better performance in IntServ routers due to label switching, Quality of Service support in IPv6 networks, and the use of IPv6 resources created for QoS support and not used yet. Additionally, this solution allows to its flows could be easily mapped to MPLS transport networks due to the use of the same size flow label. KEYWORDS Ipv6,Quality of Service, Router architecture, Label switching, IntServ, MPLS.  

Revista Colombiana de Computación. Volumen 7 Número 1 Junio de 2006

Presentamos a la comunidad académica este nuevo volumen de la Revista Colombiana de Computación para el cual se han seleccionado los artículos mejor evaluados en el Congreso EATIS 2006 (Congreso Euroamericano de Telemática y Sistemas de Información), el cuál se llevó a cabo en la ciudad de Santa Marta, Colombia, del 7 al 10 de febrero de 2006 y que contó con el respaldo de las asociaciones IEEE, IEEE Computer Society, ACM y Sociedad Brasilera de Computación.We present to the academic community this new volume of the Colombian Journal of Computing, for which the best evaluated articles have been selected at the EATIS 2006 Congress (Euro-American Congress on Telematics and Information Systems), which took place in the city of Santa Marta, Colombia, from February 7 to 10, 2006, with the support of the IEEE, IEEE Computer Society, ACM and Brazilian Computing Society associations

A Review of Automatic Patient Identification Options for Public Health Care Centers with Restricted Budgets

A comparative review is presented of available technologies suitable for automatic reading of patient identification bracelet tags. Existing technologies’ backgrounds, characteristics, advantages and disadvantages, are described in relation to their possible use by public health care centers with budgetary limitations. A comparative assessment is presented of suitable automatic identification systems based on graphic codes, both one- (1D) and two-dimensional (2D), printed on labels, as well as those based on radio frequency identification (RFID) tags. The analysis looks at the tradeoffs of these technologies to provide guidance to hospital administrator looking to deploy patient identification technology. The results suggest that affordable automatic patient identification systems can be easily and inexpensively implemented using 2D code printed on low cost bracelet labels, which can then be read and automatically decoded by ordinary mobile smart phones. Because of mobile smart phones’ present versatility and ubiquity, the implantation and operation of 2D code, and especially Quick Response® (QR) Code, technology emerges as a very attractive alternative to automate the patients' identification processes in low-budget situations. Keywords— Patient identification, Automatic identification, 2D Codes, RFID, ID tags, EHR

Estimation of emptying urinary bladder in paraplegic and elderly people based on bioimpedance, hypogastric region temperature and neural network

As is known, bioimpedance is a measurement method that can be used in medicine to know the volume of a person’s urinary bladder. However, this method is not entirely reliable due to the multiple factors that influence its measurement, such as the weight of the person, body fat and even the different skin type of each person. Therefore, this paper proposes a method that combines bioimpedance, hypogastric region temperature and an artificial feed-forward neural network, sufficiently capable of determining when to empty the bladder, so that this muscle is not affected by the time exceeded of urine continence, this work is aimed to people who have suffered injuries to their spine, who do not have the ability of feeling when their bladder needs to be emptied. It is also aimed to older adults who begin to have problems with their bladder control, allowing them to improve their quality of life. © Springer Nature Singapore Pte Ltd. 2019.As is known, bioimpedance is a measurement method that can be used in medicine to know the volume of a person’s urinary bladder. However, this method is not entirely reliable due to the multiple factors that influence its measurement, such as the weight of the person, body fat and even the different skin type of each person. Therefore, this paper proposes a method that combines bioimpedance, hypogastric region temperature and an artificial feed-forward neural network, sufficiently capable of determining when to empty the bladder, so that this muscle is not affected by the time exceeded of urine continence, this work is aimed to people who have suffered injuries to their spine, who do not have the ability of feeling when their bladder needs to be emptied. It is also aimed to older adults who begin to have problems with their bladder control, allowing them to improve their quality of life. © Springer Nature Singapore Pte Ltd. 2019.Prag