TAILIEUCHUNG - Tối ưu hóa viễn thông và thích nghi Kỹ thuật Heuristic P10

All point-to-point communication networks have a means of directing traffic from a source to a destination via intermediate nodes. This routing function must be performed efficiently as it affects all aspects of network communications including jitter, latency and total bandwidth requirement. Other issues related to routing, such as policing and traffic control are not dealt with in this chapter. There are two distinct approaches to ‘routing’ traffic, namely connection-oriented and connectionless. . | Telecommunications Optimization Heuristic and Adaptive Techniques. Edited by David W. Corne Martin J. Oates George D. Smith Copyright 2000 John Wiley Sons Ltd ISBNs 0-471-98855-3 Hardback 0-470-84163X Electronic 10 Optimization of Restoration and Routing Strategies Brian Turton Introduction All point-to-point communication networks have a means of directing traffic from a source to a destination via intermediate nodes. This routing function must be performed efficiently as it affects all aspects of network communications including jitter latency and total bandwidth requirement. Other issues related to routing such as policing and traffic control are not dealt with in this chapter. There are two distinct approaches to routing traffic namely connection-oriented and connectionless. Connectionless networks use information contained within the data packet itself. Typically the destination address is all that is required however explicit routing information may also be contained within the packet. Connection oriented networks establish the route first and subsequently use it for all traffic associated with the connection until it is torn down. In both cases a method is required for the efficient identification of either a route for the packet or a route for the connection being established. The Traditional Approach Traditionally routing has been static with permanent routes established in the switches or dynamic with routes established according to the traffic flow at the time. In static routing manual updates to the routing tables is still a common occurrence for connection oriented networks and is frequently based on the experience of the network manager. Different forms of shortest path routing method Steenstrup 1995 are usually employed to assist in Telecommunications Optimization Heuristic and Adaptive Techniques edited by . Corne . Oates and . Smith 2000 John Wiley Sons Ltd 168 Telecommunications Optimization Heuristic and Adaptive .

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