Francisco M. Delicado

University of Castilla-La Mancha · Computer Systems

La revisión bibliográfica es una fase fundamental en un proyecto de investigación, y debe garantizar la obtención de la información más relevante en el campo de estudio. El objetivo principal de este proyecto es conocer los trabajos relacionados con el Internet de las Cosas Médicas, en adelante (IoMT). Se analiza un total de 535 artículos buscados...

Fog computing arises as a complement to cloud computing where computing and storage are provided in a decentralized way rather than the centralized approach of the cloud paradigm. In addition, blockchain provides a decentralized and immutable ledger which can provide support for running arbitrary logic thanks to smart contracts. These facts can lea...

Glyphosate contamination in waters is becoming a major health problem that needs to be urgently addressed, as accidental spraying, drift, or leakage of this highly water-soluble herbicide can impact aquatic ecosystems. Researchers are increasingly concerned about exposure to glyphosate and the risks its poses to human health, since it may cause sub...

In the context of IEEE 802.16e networks, physical transmission relies on Orthogonal Frequency Division Multiple Access (OFDMA). This mechanism defines resource allocation as a bi-dimensional mapping of spectral resources. Although in the IEEE 802.16e standard the Medium Access Control (MAC) and physical (PHY) layers are well defined, the problem of...

The IEEE 802.16 standard defines a contention bandwidth request mechanism offering QoS-aware broadband access through a wireless medium. According to the standard, the Base Station (BS) is responsible for granting the requests issued by the Subscriber Stations (SSs). The SSs communicate their requests to the BS by placing their requests into the up...

The IEEE 802.16 standard is one of the BWA (Broadband Wireless Access) standards, which could provide Quality of Service (QoS) support to applications with end-to-end delay, jitter and/or maximum loss rate requirements. Its Medium Access Control (MAC) layer is centralized basis, where the Base Station (BS) is responsible for assigning the needed ba...

Orthogonal Frequency Division Multiple Access (OFDMA) is one of the most promising, demanded and researched modulation and access methods for future mobile wireless networks. Emerging technologies, like Worldwide Interoperability for Microwave Access (WiMAX) or Long Term Evolution (LTE), are adopting OFDMA due to its high spectral efficiency, scala...

Broadband Wireless Access (BWA) is gaining interest due to the increasing demand of high-quality mobile wireless systems. In this context, the IEEE 802.16 standard, and particularly its OFDMA physical transmission mode, is one of the most promising and researched technologies. In OFDMA, data have to be mapped into a time-frequency matrix before the...

Broadband Wireless Access (BWA) offers QoS-aware broadband access through a wireless medium, being IEEE 802.16 one of the BWA standards. In it, the Base Station (BS) is responsible of allocating the required bandwidth by the rest of nodes, acting as a central controller. The other nodes, Subscriber Stations (SSs), have to send a bandwidth request t...

Demand of high quality broadband wireless systems is quickly and continuously increasing day by day. Nowadays, one of the most promising Broadband Wireless Access (BWA) technologies is Worldwide Interoperability for Microwave Access (WiMAX), characterized by the IEEE 802.16 standard. Efficient data transmission and available bandwidth use optimizat...

The IEEE 802.16 standard is a Broadband Wireless Access (BWA) technology which offers Quality of Service (QoS) support to different types of applications. This standard defines the physical (PHY) and medium access control (MAC) layers. Its MAC layer defines different types of QoS mechanisms to support various types of applications, being the multic...

A handover mechanism defines the steps involved in the transfer of all information and resource allocation enabling a mobile terminal to remain connected to the wireless network infrastructure. A large number of handover mechanisms have been reported in the literature for Wireless ATM (WATM) networks. In this paper, we carry out a comprehensive QoS...

The use of Broadband Wireless Access (BWA) technology is increasing due to the use of Internet and multimedia applications with strict requirements of end-to-end delay and jitter, through wireless devices. The IEEE 802.16 standard, which defines the physical (PHY) and the medium access control (MAC) layers, is one of the BWA standards. Its MAC laye...

Broadband wireless access systems offer a solution for broadband access and QoS-aware multimedia services through a wireless medium. The IEEE802.16 standards specify the physical and medium access control layers for broadband wireless access systems as well as the various mechanisms to meet the quality of service (QoS) requirements of a wide variet...

Nowadays, a large number of applications characterized by stringent endtoend requirements are on high demand. The development of Broadband Wireless Access (BWA) should enable the ubiquitous and cost-effective deployment of such applications. The IEEE 802.16 standard is currently one of the promising BWA technology under development. The IEEE 802.16...

Broadband wireless access systems offer a solution for broadband access and QoS-aware multimedia services through a wireless medium. The IEEE 802.16 standards specify the physical and medium access control layers for broadband wireless access systems as well as the various mechanisms to meet the quality of service (QoS) requirements of a wide varie...

In recent years there has been an explosive growth on the use of wireless video communications. Despite much research in this field, the deployment of effective QoS-aware real-time video services over wireless channels remains a challenging task. In this paper, we first introduce and describe an overall system architecture capable of offering true...

Recent advances in wireless technology are enabling the design and deployment of multiservice wireless networks. In order to be able to meet the QoS requirements of the various applications, it is essential to deploy QoS provisioning mechanisms. In this paper we present a QoS framework to support various types of services in a wireless networking e...

In recent years there has been an explosive growth on the use of wireless video communications. Despite much research in this field, the deployment of effective QoS-aware real-time video services over wireless channels remains a challenging task. In this paper, we first introduce and describe an overall system architecture capable of offering true...

The design of high-performance wireless LAN technologies making use of TDMA/TDD MAC is a very active area of research and development. The control of the network resources of such networks is taken care by a central controller. The mobile terminals may place their resource requests by making use of a well-defined set of primitives. In turn, the cen...

Objective video quality metrics play a major role in the overall design of many video applications. The quality measures are valuable because they provide video designers and standards organizations with means for making meaningful quality evaluations with-out convening viewer panels. It is well-known that simple energy based metrics such as the pe...

The IEEE 802.16 standard, called WiMax (Worldwide Interoperability for Microwave Access), defines the basics of the mechanisms enabling the QoS (quality of service) provisioning in multiservice BWA-based networks. However, the standard does not define the specifics of such mechanisms. In recent years, several studies have undertaken the analysis of...

Recent advances on wireless technology are enabling the design and deployment of multiservice wireless networks. In order to be able to meet the QoS requirements of the various applications, it is essential to deploy QoS provisioning mechanisms. In this paper, we present a QoS framework to support various types of services in a wireless networking...

In recent years, several wireless LAN technologies making use of TDMA/TDD MAC have been designed. In this type of environment, there is the need for a central controller responsible for allocating the bandwidth among all the active mobile terminals. In order to properly carry out this task, the use of simple but effective signaling and bandwidth al...

Many studies have been conducted to evaluate the benefits of using layered video coding schemes as a means to improve the robustness of video communications systems. In this paper, we study a frame-aware nonlinear layering scheme for the transport of a DCT-based video over packet-switched networks. This scheme takes into account the relevance of th...

Many studies have been conducted to evaluate the benefits of using layered video coding schemes as a means to improve the robustness of video communications systems. In this paper, we study a frame-aware nonlinear layering scheme for the transport of a DCT-based video over packet-switched networks. This scheme takes into account the relevance of th...

Recent advances on wireless technology are enabling the design and deployment of multiservice wireless networks. In order to be able to meet the QoS requirements of the various applications, it is essential to deploy QoS provisioning mechanisms. To be most effective, these mechanisms require to monitor the status of the various active sources enabl...

Personal communication systems (PCS) aim to provide ubiquitous service to its subscribers. In order to fulfil the ubiquity requirement for service, PCS rely on two main features: use of wireless communications technology and mobility management. The former sets the basis to untie subscribers from a wire allowing them to freely move around. The latt...

HIPERLAN/2 is a recent standard from ETSI for highspeed wireless LANs. This work explores this standard when providing QoS support to different traffic types. We describe a new bandwidth allocation protocol, which distinguishes among five types of connections, each one of them having its own QoS requirements. We carry out a performance evaluation v...

A handover mechanism defines the steps involved in the transfer of all the information and resource allocation enabling a mobile terminal to remain connected to the wireless network infrastructure. A large number of handover mechanisms have been reported in the literature. We carry out a comprehensive QoS performance study of the handover mechanism...

Recent advances in wireless technology are enabling the design and deployment of multiservice wireless networks. In order to be able to meet the QoS requirements of the various applications, it is essential to deploy QoS provisioning mechanisms. In this paper, we present various QoS provisioning mechanisms. Our simulation results show the effective...

It is widely recognized that mobility is one of the main features of wireless networks. In order to be able to remain reachable within a given geographic area (cell), a mobile terminal has to keep within the reach of a base station. As the mobile terminal moves from cell to cell, the station has to connect to the base station covering the new cell....

It is widely recognized that mobility is one of the main features of wireless networks. In order to be able to remain reachable within a given geographic area (cell), a mobile terminal has to keep within the reach of a base station. As the mobile terminal moves from a cell to cell, the station has to connect to the base station covering the new cel...

A large number of studies have been conducted to evaluate the benefits of using layered video coding schemes as a means to improve the robustness of video communications systems. In this article, we study a frame-aware layering scheme for the transport of DCT-based video over packet switched networks. Under this scheme, the relevance of the differe...

Two major issues in providing true end-to-end wireless/mobile video capabilities are: interoperability among network platforms and robustness of video compression algorithms in error-prone environments. In this paper, we mainly focus on the second issue and show how error resilience techniques can be used to improve the video quality. We argue that...

In the last years, the deployment of wireless networks and the development of multimedia applications have spurred the need for reliable transmission of mixed media information over wireless links. The use of ATM-based wireless links may partially address the need of a communications infrastructure capable of meeting the QoS expectations of a wide...

Audio-visual and other multimedia services are seen as an important source of traffic for current telecommunications networks, including ATM networks. There has been an emerging interest in using ATM for wireless transmission. Because ATM is primarily designed for an essentially error-free environment, in the wireless context the sources of errors...

Because ATM is primarily designed for an essentially error-free environment, in a wireless context the sources of errors and their consequences must be thoroughly understood. While this concern is valid in any network, it takes on a new, more central role in the wireless environment where error bursts are expected to be a very significant source of...

1 In the last years, the development of novel video coding technologies has spurred the interest in developing digital video communications. The definition of evaluation mechanisms to assess the quality of video will play a major role in the overall design of video communication systems. It is well-known that simple energy based metrics such as the...