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OSPF is one of the routing protocols which is the most widely used in internet and intranet today. The link-state algorithm in OSPF is based on the thought of local optimization, but in certain cases, routing algorithms based on local optimization might lead to a disadvantage which will remarkably depress global performances. A self-adaptive method based on the genetic algorithm is proposed, which...
Delivery of the required QoS in IP-over-DWDM networks would face uncertain environment capacity problems due to demand variations over different periods of network operation. Therefore, future demand uncertainties should be considered in planning DWDM transport backbones for capacity sensitive telecommunication applications with enhanced quality of service. This paper, presents a genetic algorithm...
An important challenge in cellular IP networks, which deals with the micro mobility, is providing good quality of service (QoS) to the users especially to the real-time users that are involved in the exchange of real-time packets. Bandwidth reservation for real-time traffic to maximize the connection completion probability (CCP) is an important activity. Genetic algorithm (GA), which is a useful tool...
Real-time distributed multimedia applications have special requirements in terms of bandwidth, delay, delay jitter, etc. The current network, essentially being a connection-less network, provides only un-reliable, best-effort service. The data packets may follow different paths to the destination. The network resources, viz., switch buffer and link bandwidth, are fairly shared by packets from different...
The user-level brokers in grids consider individual application QoS requirements and minimize their cost without considering demands from other users. This results in contention for resources and sub-optimal schedules. Meta-scheduling in grids aims to address this scheduling problem, which is NP hard due to its combinatorial nature. Thus, many heuristic-based solutions using genetic algorithm (GA)...
Traffic engineering, particularly routing optimization, is one of the most important aspects to take into account when providing QoS in next generation networks (NGN). The problem of weight setting with conventional link state routing protocols for routing optimization has been object of study by a few authors. To solve this problem for big networks artificial intelligence heuristics have been used,...
Call admission control (CAC) plays a significant role in communication networks. In heterogeneous environments, CAC performs differrent function in different segments along with an end-to-end data path. In this paper, an end-to-end CAC model in transport layer is presented. Further, a unified CAC (U-CAC) algorithm is proposed , which manage different kinds of upstream traffics from different access...
QoS-aware service composition intends to maximize the QoS of a composite service when selecting service providers. This paper proposes a service composition scheme that uses a combination of Integer Programming, case-based reasoning, and, genetic algorithms techniques. The scheme reduces the service composition costs by reusing existing compositions. Experiments show that, compared with solutions...
The requirements for quality of service (QoS) of applications in networks are becoming stricter. Toward to solve the routing problem in IP networks, MPLS architecture allows to define explicit routes in the network. This paper describes a multi-objective heuristic approach to solve the routing problem in MPLS networks. An evolutionary multi-objective algorithm is proposed based on Dijkstra's shortest...
In this paper, a QoS multicast routing algorithm in IP/DWDM optical Internet is proposed. Given a user request, a bandwidth, delay jitter and error rate bounded and cost optimized QoS multicast routing tree is constructed based on the evolutionary-simplex-algorithm, taking network load balancing into account. Simulation results have shown that it is not only feasible and effective but also advantageous...
IP/DWDM optical Internet is one of the main networking technologies for the NGI (next generation Internet). QoS multicast routing is one of its basic problems to be solved and is proven to be NP-hard. Thus, a non-NP algorithm is proposed in this paper. It is based on bi-population-evolution to find a cost-optimized QoS multicast routing tree with routing and wavelength assignment solved integratedly...
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