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Publicações

Publicações por CTM

2006

Instant management infrastructure: Through network management support systems and software agents coordination

Autores
Folha, JA; Marques, BF; Oliveira, JA; Coelho, PM; Oliveira, RF;

Publicação
ICE-B 2006 - International Conference on e-Business, Proceedings

Abstract
Enterprises need to automate manual and routine aspects of IT infrastructure management. In this paper a new concept that integrates different autonomous and management level applications through Instant Messaging protocol (XMPP) is introduced. This is achieved by means of a common management information model implemented in LDAP. A content language implemented in XML is also described, allowing autonomous application integration to carry out management tasks dynamically.

2006

GANS: A Signalling Framework for Dynamic Interworking between Heterogeneous Networks

Autores
Akhtar, N; Campos, R; Kappler, C; Paakkonen, P; Poyhonen, P; Zhou, D;

Publicação
2006 IEEE 64TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6

Abstract
There is a growing trend towards convergence of telecommunication and data networks in order to support a richer set of services and applications. At the same time, increasing diversity and density of network access technologies has made the goal of providing connectivity anytime and anywhere a real possibility. Another important development is the emergence of small, low-complexity user owned networks, such as Personal Area Networks and Body Area Networks. Dynamic interworking, also known as network composition, between networks of different types and sizes is essential in the push towards convergence, as well as to realize truly seamless connectivity between heterogeneous access networks. Dynamic interworking requires signalling between different elements of the control planes of the different networks in order to coordinate the control functions and resources of the networks concerned. In this paper, we present the Generic Ambient Network Signalling protocol suite to address the diverse signalling requirements for dynamic interworking of networks.

2006

Scalability of name resolution for ambient networks

Autores
Paakkonen, P; Akhtar, N; Campos, R; Kappler, C; Poyhonen, P; Zhou, D;

Publicação
WIRED/WIRELESS INTERNET COMMUNICATIONS, PROCEEDINGS

Abstract
The convergence of mobile domain and data networks has been under focus in the standardization forums. However, dynamic interworking of wired infrastructure, wireless access systems and small scale Personal Area Networks has been challenging due to their heterogeneous nature. One of the most important problems to be solved is name resolution between different terminals and networks. This paper presents a new mechanism for name resolution, which relies on existing naming mechanisms. In particular the focus is on the scalability of the solution from signaling load and latency point of view.

2006

Implementation of a dominance protocol for wireless medium access

Autores
Pereira, N; Andersson, B; Tovar, E;

Publicação
12th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, Proceedings

Abstract
Consider the problem of scheduling sporadic message transmission requests with deadlines. For wired channels, this has been achieved successfully using the CAN bus. For wireless channels, researchers have recently proposed a similar solution; a collision-free medium access control (AMC) protocol that implements static-priority scheduling. Unfortunately no implementation has been reported, yet. We implement and evaluate it to find that the implementation indeed is collision-free and prioritized. This allows us to develop schedulability analysis for, the implementation. We measure the response times of messages in our implementation and find that our new response-time analysis indeed offers an upper bound on the response times. This enables a new class of wireless real-time systems with timeliness guarantees for sporadic messages and it opens-up a new research area: schedulability analysis for wireless networks.

2005

A processor for testing mixed-signal cores in System-on-Chip

Autores
Duarte, F; da Silva, JM; Alves, JC; Pinho, GA; Matos, JS;

Publicação
DSD 2005: 8th Euromicro Conference on Digital System Design, Proceedings

Abstract
This paper describes the design of a processor specific for testing cores embedded in system-on-chip. This processor which can be implemented within a system's reconfigurable area, shall be responsible for scheduling and control test operations and perform preliminary data processing, as well as to provide the interface with an external tester Building these test operations on-chip allows for simplifying external tester interface and to reduce testing time. The testing procedure and the infrastructure required to test an AID converter is described as an example.

2005

MPLS - Multiprotocol Label Switching

Autores
Ruela, J; Ricardo, M;

Publicação
The Industrial Information Technology Handbook

Abstract

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