Antônio Jorge G. AbelémFederal University of Pará | UFPA · Faculty of Computing
Antônio Jorge G. Abelém
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53
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Introduction
Skills and Expertise
Publications
Publications (53)
O cache em rede é uma importante característica de Redes Centrada em Conteúdo (RCCs). A escolha dos nodos que armazenarão o conteúdo é um grande desafio e uma boa maneira de fazer isso é através de medidas de centralidade de rede, que descrevem a importância de um nodo, dada uma característica. Entretanto, o grande número de medidas torna a escolha...
The second Global Experimentation for Future Internet (GEFI)workshop was held October 25-26 in Rio de Janeiro, Brazil, hosted by Rede Nacional de Ensino e Pesquisa (RNP). Attendees representing Brazil, the United States, the European Union, Japan, and the Republic of Korea participated in a mixed format of presentations and open group discussions t...
The Future Internet approach requires new solutions to support novel usage scenarios driven by the technological evolution and the new service demands. However, this paradigm shift requires deeper changes in the existing systems, which makes Internet providers reluctant in deploying the full transformation required for the Future Internet. The Enti...
The user experience on watching live video sequences transmitted over a Flying Ad-Hoc Networks (FANETs) must be considered to drop packets in overloaded queues, in scenarios with high buffer overflow and packet loss rate. In this paper, we introduce a context-aware adaptation mechanism to manage overloaded buffers. More specifically, we propose a u...
Software Defined Networking (SDN) has emerged as a new paradigm that highly increase the network management flexibility through simple but powerful abstractions. The key idea is decoupling the control plane, which makes the forward decisions, from the data plane, which effectively makes the forward. However, the OpenFlow, the main SDN enabler, is d...
ao por Rede El´ etrica. Abstract— Bandwidth estimate in a computer network is useful to multimedia applications, Quality of Service controllers and reservation and resource controls protocols. Very much utilized methods on cabled and wireless networks is not applicable on PLC (Power Line Communications) networks. In this paper, we present an approa...
Wireless Mesh Networks (WMNs) are increasingly deployed to enable thousands of users to share, create, and access live video streaming with different characteristics and content, such as video surveillance and football matches. In this context, there is a need for new mechanisms for assessing the quality level of videos because operators are seekin...
The increase in complexity of computer networks and their services have boosted the development of standardizations, models, and solutions for network management over the years. Lately, the Distributed Management Task Force (DMTF) defined the Common Information Model (CIM) for describing computational entities and businesses on the Internet. This p...
Packet scheduling is essential to properly support applications on Software-Defined Networking (SDN) model. However, on OpenFlow/SDN, QoS is only performed with bandwidth guarantees and by a well-known FIFO scheduling. Facing this limitation, this paper presents the QoSFlow proposal, which controls multiple packet schedulers of Linux kernel and imp...
Currently, there is a philosophical problem that arises between the real need for current support to OpenFlow and legacy network infrastructure. Among them, the legacy networking has not been compatible with OpenFlow network, and for that, it needs to be replaced or a few cases upgraded, as a consequence there are additional spending with new equip...
In the next generation of mobile network services, there will be the provision of multimedia services with the desired quality for wireless networks. In the future Internet, an integrated platform of cloud services will be made available within the XaaS (X-as-a-Service) paradigm. In the light of this evidence, the fo- cal point of this study is an...
The development of real-time quality estimator schemes for emerging Internet videos with different content types remains a significant challenge and is crucial for the success of wireless multimedia systems. However, currently in-service assessment schemes fail in capturing subjective aspects of multimedia content related to the user perception. Th...
Currently, the Internet is experiencing a revolution in the provisioning and demand of multimedia services. In this context, 3D-video is envisioned to attract more and more the multimedia market with the perspective for enhanced applications (video surveillance, mission critical control, entertainment, etc.). However, 3D-video content delivery plac...
As Wireless Mesh Networks (WMNs) have been increasingly deployed, where users can share, create and access videos with different characteristics, the need for new quality estimator mechanisms has become important because operators want to control the quality of video delivery and optimize their network resources, while increasing the user satisfact...
The Future Internet will arise from the convergence of new network concepts and combine technologies, services, media and content. It will offer flexibility and diversity, with scalable content and services that are accessible through a wide range of interfaces and devices. However, the biggest challenge now is how to enable and test the proposed a...
Improvements in genome sequencing techniques have resulted in generation of huge volumes of data. As a consequence of this progress, the genome assembly stage demands even more computational power, since the incoming sequence files contain large amounts of data. To speed up the process, it is often necessary to distribute the workload among a group...
It is expected that multimedia applications will be the most abundant application in the Internet and thousands of new wireless and mobile users will produce and share multimedia streaming content ubiquitously. In this multimedia-aware system, it is important to assure the end-to-end quality level support for video and voice applications in wireles...
Recent advances in Wireless Mesh Networks (WMNs) have overcome the drawbacks of traditional wired and ad-hoc networks and now they are seen as a means of allowing last mile communications with quality level assurance in Future Multimedia Systems. However, new routing schemes are needed to provide end-to-end Quality of Service (QoS) and Quality of E...
The proliferation of broadband wireless facilities, together with the demand for multimedia applications, are creating a wireless multimedia era. In this scenario, the key requirement is the delivery of multimedia content with Quality of Service (QoS) and Quality of Experience (QoE) support for thousands of users (and access networks) in broadband...
This paper sets out an extension of an AODV routing protocol, called Routing by Energy and Link quality indicator (REL). The proposed protocol adopts a new cross-layer approach as a mechanism to select the best routes. The paths are selected on the basis of remaining energy, a proposed link quality estimator (WeakLink), and hop count. Thus, REL pro...
The OpenFlow protocol allows production networking environments such as campus networks, metropolitan networks or R&D networks, to be used as experimental infrastructure hosting, future internet architectures, softwares and protocols, in isolation to the production traffic. During rollout, one practical problem arises with legacy switches that do n...
In a near future, wireless mesh networks (WMNs) and multimedia content will be abundant technologies/applications in the Internet. Hence, in order to keep and attract new customers, as well as, reduce operational costs, the development of new quality level control schemes are needed and it is one of the key requirements for the success of next gene...
This paper presents a hybrid analytical/simulated model to analyze the performance of upstream flows in Ethernet Optical Passive Networks (EPON) based on frame's total delay. The modeling was done using Stochastic Colored Petri Networks (SCPN), from where the average queue size is obtained. Then, this average is used to analytically obtain the tota...
The growth of multimedia applications and wireless systems requires a new behavior of routing protocols for wireless mesh networks (WMNs). It is necessary to provide not only the minimum requirements for quality of service (QoS), but also to assure the quality of experience (QoE) support for multimedia applications. In this context, the usage of on...
It is reported a LPG dynamic interrogation technique based on the modulation of fibre Bragg gratings located in the readout unit that permits to attenuate the effect of the 1/f noise of the electronics in the resolution of the LPG-based sensing head. The concept is tested to detect variations of the external refractive index and a resolution of 2.0...
The adoption of Wireless Mesh Networks (WMNs) is a solution to provide last mile indoor and outdoor Internet access and is
gaining an important attention form academic and industry research groups in recent years. WMNs will support the distribution
of diverse type of services, ranging from battlefield surveillance to high quality mobile audio and v...
Nowadays wireless systems changing our life experience, allowing ubiquitous communications, attracting new users, and supporting
new applications, such as video streaming, VoIP, Mobile TV and other kind of multimedia applications. The combination of wireless
networks and multimedia content distribution requires a new behavior of routing protocols f...
1 Universidade Federal do Pará (UFPA) 2 Rede Nacional de Ensino e Pesquisa (RNP) 3 On secondment from Universidade Federal Fluminense (UFF) Abstract. This paper discusses the current state of research into large-scale network architectures to substitute the current Internet architecture. Such a "clean slate" approach to "Future Internet" architectu...
The adoption of wireless mesh networks as a solution for access networks in indoor and outdoor environments is considered by the academic community and industry as a good alternative for Internet access due to their economic and technical feasibility. However, the existence of proprietary and open-source solutions that are not interoperable and the...
The increasing demand of multimedia applications requires a new conduct of routing protocols for Wireless Mesh Networks (WMN). It is necessary to support the minimum requirements for Quality of Service (QoS), but the WMN also need to support the minimum requirements for Quality of Experience (QoE). This article complements analysis of the proposed...
This paper presents a proposal for dynamic control of Quality of Service (QoS) in optical networks based on optical burst switching (OBS) using a GMPLS control plane. In this proposal, monitoring agents are used to verify the QoS experienced by the burst classes and to deploy reactive mechanisms in order to guarantee absolute performance levels. Us...
We present a multiple-metric approach in order to improve routing in wireless mesh networks (WMNs). It is based on the proactive optimized link state routing (OLSR) protocol to deal with applications with high quality of service (QoS) demands. Since routing with multiple metrics is an NP-complete problem, we use the analytic hierarchy process (AHP)...
This paper proposes an architecture for the establishment of routes with absolute QoS constraints for optical burst switched grid networks. This model uses traffic engineering provided by GMPLS to build LSPs that matches the required performance in response to a request made by the user/application of the grid. Results show that the proposal is cap...
This paper proposes an architecture for the automatic establishment of connections that match the performance constraints for grid applications. This architecture is based on optical burst switching and on the utilization of protocols with traffic engineering functionalities. It propose an element called GOBS (Grid Optical Burst Switching) Server t...
The Transmission Control Protocol - TCP has been widely researched in many different networking technologies such as wireless, optical, satellite, sensor, and wired since it is the most used protocol on the Internet. In Wireless mesh networks, this protocol still has challenges due to its origin and implementations for wired networks. This paper pr...
Wireless mesh networks (WMNs) can be used in many different ap-plications. However, they lack standards and, as a consequence, a number of issues must still be addressed to ensure the proper functioning of these networks. Amongst these issues, routing is this paper's main concern. Thus, we propose the use of multiple metrics with the proactive Opti...
In this paper we propose an extention to the proac-tive Optimized Link State Routing (OLSR) protocol in order to provide quality of service and support to applications using the TCP protocol. The proposal performance, called OLSR Dynamic Choice (OLSR-DC), is evaluated using the Network Simulator. These simulations show the extension's performance b...
The 802.11x standard for wireless network has been widely adopted by large corporations and institutions during its daily tasks, forasmuch the productivity increase produced by flexibility and mobility found in these new sorts of wireless equipments have provided great operational advantages. Nevertheless, there are some important security issues t...
Label switching, which in IP networks is exemplified by MPLS and its extensions MPLambdaS and GMPLS, appears as one of the
best alternatives to offer a reliable and flexible control plane for WDM networks, since it allows the integration of the
IP Protocol with WDM technology, when lambdas are associated with labels, implements powerful traffic-eng...
The adoption of Wireless Mesh Networks (WMNs) is a solution to provide last mile indoor and outdoor Internet access and is gaining an important attention academic and industry research groups in recent years. WMNs will support the distribution of diverse type of services, ranging from battlefield surveillance to high quality mobile audio and video...
New research perspectives opened up by the combination of IP and WDM technologies present an excellent opportunity for reformulating certain aspects of multicast transmission, bringing them more in line with the needs of future generations of IP internetworking. This paper analyses MIRRORS, which proposes modifications to traditional IP Multicast i...
This paper presents a evaluation of Optimized Link State Routing (OLSR) protocol with Expected Transmission Count (ETX), Expected Transmission Time (ETT), Minimum Delay (MD), Minimum Loss (ML) and Alternative Path (AP) metrics that were implemented and installed in the routers with OpenWrt at the UFPA wireless mesh networks. On the testbed was veri...
This paper shows the progress of the dissertation project that aims to propose a TCP protocol adaptation for mesh networks using a cross layer technique. It also shows the TCP protocol problems in wireless networks and the available solutions, as well as the finished activities, the ones in progress and the ones to be accomplished which are necessa...
![Figura 2. Ilustração de cenário com visada direta [6].](profile/Michael-Stanton-10/publication/228766562/figure/fig2/AS:341131394076673@1458343470767/Figura-2-Ilustracao-de-cenario-com-visada-direta-6_Q320.jpg)
The necessity of wireless networks already has been felt a long time ago in sight of limitations imposed by the wired networks, mainly related to the increasing necessity of flexibility of the current network projects. In association to this necessity, also is observable a crescent demand for data transmissions that supply the current multimedia ap...
The increasing use and importance that networks have acquired in today's economics and social context also brought an increase in the number of malicious activities that violate privacy and security policies of institutional networks. There are several approaches that aim to detect such activities, for instance the usage of intrusion detection syst...
The adaptation of label switching to multicast communication in optical networks opens several opportunities for research, since most of the previous studies and definitions only considered the point-to-point communication (unicast) approach. In the specific case of the triggering problem for LSPs (Label Switched Paths), there is still no consensus...
The IEEE 802.11e standard was developed to provide quality of service for wireless local networks, since it is based on best effort service. In this paper, we propose a new admission control mechanism, used to restrict network traffic excess, prioritizing handoff calls, because studies prove that the loss of such call has a bigger impact when compa...
The IEEE 802.11e standard was developed to provide quality of service for wireless local networks, since it is based on best effort service. In this paper, we propose a new admission control mechanism, used to restrict network traffic excess, prioritizing handoff calls, because studies prove that the loss of such call has a bigger impact when compa...
The increasing use and importance that networks have acquired in today's economics and social context also brought an increase in the number of malicious activities that violate privacy and security policies of institutional networks. There are several approaches that aim to detect such activities, for instance the usage of intrusion detection syst...
This paper presents a number of suggestions for altering the signaling and control mechanisms used in GMPLS, to make them more suitable for use with Labeled Optical Burst Switching (LOBS). In order to evaluate the applicability of these proposals, we carry out simulation studies, using the Network Simulator (NS) platform. Resumo. Este artigo aprese...
Projects
Projects (2)
The technological evolution centered on the concepts of Network Slicing (NS), Software Defined Networks (SDN), Network Functions Virtualization (NFV), Internet of Things (IoT), and, more recently, on the fifth-generation mobile telecommunications networks (5G), has caused a great impact on the Internet. This impact comes not only from the creation of new technologies, communication protocols, security solutions, and energy efficiency mechanisms but also from the need to jointly operate this plethora of innovations with each other and with the legacy of the Internet.
As a result, several experimentation networks (testbeds) with different technological scopes have emerged in Brazil, targeting the research of different subsets of technologies. The FIBRE experimentation network allows SDN-like experimentation, the FUTEBOL testbed allows experimentation in telecommunications networks involving optical and wireless communications, CloudNEXT supports experimentation on cloud computing and bare-metal provisioning, FIWARE focuses on future Internet-based applications with the Internet of Things (IoT), 5GINFIRE allows experimentation with 5G networks, and, finally, NECOS, focused on the creation of slices that encompass different clouds with distributed resources.
In this scenario, the main objective of the Slicing Future Internet Infrastructures (SFI2) project is to provide a solution for the provision of advanced networking scenarios and allocation of diverse computational resources by slicing these multi-domain experimentation infrastructures towards an integrated multi-domain and multi-technology experimentation network (testbed).
SFI2 technological effort uses intelligent orchestration of multi-domain slicing, offering Slice-as-a-Service (SlaaS) for future Internet developers.
