TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS

Transcription

1 Mestrado em Engenharia de Redes de Comunicações TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS Introdução à Análise, Planeamento e Projecto de Redes - Introduction to Network Analysis, Planning and Design 1

2 Outline TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 2

3 Dealing with Complexity! The Telecommunications Network is the largest system man has ever made! With convergence of Telecommunications and Information Technologies, the system gets larger and more complex TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 3

4 Background Network Analysis, Architecture, and Design have traditionally been considered art, combining: an individual s particular rules on evaluating and choosing network technologies; knowledge about how technologies, services, and protocols can be meaningfully combined; experience in what works and what doesn t work; (often arbitrary) selections of network architectures. This may have been acceptable in the early days of networking, when networks were more of a hobby than a critical resource and did not directly support revenue generation. Today, Networks are considered mission-critical and provide near real-time access to information throughout the world. As such, the Design of a Network must be logical, reproducible, and defensible. TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 4

5 Background Network Analysis, Architecture, and Design have traditionally focused on capacity planning, which is over-engineering a network to provide capacity or coverage, estimated to accommodate traffic or serviced users fluctuations over the life cycle of the design: As network traffic grows over time, this bandwidth buffer is reduced, and users experience problems related to traffic congestion. This is an inefficient use of network resources, wasting money in resources that are not used while failing to provide the flexibility needed to adapt to users changing traffic requirements. As network expansion evolves over time, the coverage conditions require complex adaptations from the Access up to the Core of the Network. Besides network bandwidth we also need to consider how delay through the network, as well as network reliability, maintainability, and availability (RMA), can be optimized. In today s evolving networks, delay and reliability can be more important than capacity. TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 5

6 Objectives Perform Network Analysis, Architecture, and Design by applying a systems methodology to networking. The Methodology to use considers the Analysis, Architecture, and Design as Processes with Information Flows between them: TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 6

7 Network Analysis TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 7

8 Network Architecture TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 8

9 Network Design Design TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 9

10 Processes Components TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 10

11 Strategic Significance Projects have immediate, tactical (nearterm), and strategic (long-term) significance: develop a network design to be implemented within one year, will prepare us for any changes we might need to make to the network within three years, and will keep us in the direction of what is planned for five years in the future TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 11

12 Conclusion Network Analysis, Architecture, and Design are similar to other engineering processes in that they address the following areas: Defining the problems to be addressed Establishing and managing customer expectations Monitoring the existing network, system, and its environment Analyzing data Developing a set of options to solve problems Evaluating and optimizing options based on various trade-offs Selecting one or more options Planning the implementation TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 12

13 TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 13

14 References and Readings TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 14