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The ability to rapidly create and deploy new services in response to the market demands will be the key factor in determining the success of future network service provider. There are several works to meet this requirement in the field of active network management [1,2,10-
Future computer networks must be more flexible and faster then today. Active network paradigm is the way how to add flexibility to networks. During the last five years, several active network architecture models were presented. A new one, based on model of active nodes is presented here. The key features of this architecture are the separation of session or connection management functions from the...
In Unspecified Bit Rate (UBR) service provided by ATM networks, user sends cells into networks with no feedback, no guarantee cells may be dropped during congestion. This paper describes a congestion control scheme using active network technology to avoid congestion in a conventional ATM network. Ants routing algorithm for congestion control and associated with active network fashion is implemented...
In this paper we present the active harness, a scalable and versatile means for deep probing of network local states. The approach makes a clear separation between the “communication” from the “information” part of the probing process. The composition of the “information” component is handled by means of network embedded harness plug-ins. It can facilitate not only a new generation of network aware...
Traditionally, the Internet supports best effort service. The quality of service available to real time applications such as the delivery of video and audio is therefore difficult to predict and control. Two new technologies have emerged recently, namely the MPEG-4 standard and active network, for media data compression and data networking, respectively. MPEG-4 uses a content or object-based representation...
A mobile ad hoc network (MANET) is one consisting of a set of mobile hosts capable of communicating with each other without the assistance of base stations. This paper considers the QoS (qualityof- service) routing problem in a MANET. We propose an on-demand protocol for searching for a multi-path QoS route from a source host to a destination host in a MANET, where a multi-path is a network with a...
This paper describes our simulation study of a new route discovery mechanism for mobile ad hoc networks. Based on the concept of unicast query and simulated with the reactive Dynamic Source Routing (DSR) protocol, the mechanism is found to perform most effectively at high node mobility, allowing routes to be acquired with significantly lower overhead. Results obtained using ns2 showed an aggregate...
In this paper, we propose a new filesystem named Ad-hoc Filesystem which targets ad-hoc wireless networks. Ad-hoc Filesystem is a serverless filesystem which automatically generates temporary shared space among multiple mobile machines when they gather in a communicable range. The generated space is kept stable as long as possible even if some machines join or leave the communicable range. We have...
Mobile ad hoc networks are data networks entirely made up of enduser communication terminals (known as nodes). Each node in the network can act as an information sink (i.e. a receiver), a source and a router. All nodes have a transmission range, which is limited by their transmission power, attenuation and interference. Mobile ad hoc networks have a number of disadvantages over wired networks. These...
This paper presents a new Cut-through forwarding mechanism for multipoint-to-point communications over ATM networks. Initially, we present the cell interleaving problem and a concise description of current ATM multicast proposals. Then, we present an improvement to existing Cut-through forwarding schemes for providing a good level of fairness among the connections competing for the available bandwidth...
Multimedia applications generate network traffic that requires stringent per-connection performance guarantees, in terms of throughput, delay, jitter and packet loss. To guarantee such performance requirements, the network must maintain two levels of control: connection admission control (CAC) at the connection level and service discipline at the packet level. In this paper we present a new service...
This paper models and evaluates the AAL multiplexer to analyze delay and departure distributions of CBR traffic in ATM networks. We consider an AAL multiplexer in which a single periodically deterministic CBR traffic stream and several variable size bursty background traffic streams are multiplexed and one ATM cell stream goes out. We model the AAL multiplexer as a BX + D/D/1 queue and analyze departure...
Motivated by Asynchronous Transfer Mode (ATM) in telecommunication networks,we investigate the problem of designing a virtual topology on a physical topology, which consists of finding a set of virtual paths (VPs) satisfying some constraints in terms of load (the number of VPs sharing a physical link) and hop count (the number of VPs used to establish a connection). For particular network: paths,w...
In response to the lack of realistic performance guarantees in “store and forward” networks, the asynchronous transfer mode (ATM) network has resurrected the idea of connection oriented calls. Thus, for every user call, the ATM network first determines and verifies a route, where possible, that meets the user’s quality of service (QoS) requirements, and then transports the traffic along the route...
Nowadays high-speed transmissions and heterogeneous traffic are some of the most essential requirements that a communication network must satisfy. Therefore, the design and management of such networks must consider these requirements. Network congestion is a very important point that must be taken into consideration when a management system is designed. ATM networks support different types of services...
Recent years have shown a great change in the telecommunication environment. Thus far, separated voice and data networks are being replaced by heterogeneous networks capable of supporting a diverse variety of traffic. Quality of Service (QoS) has become an important factor in the deployment of the next-generation of data networks. The continuing increase in the volumes of data to be carried by ATM...
This work proposes a method of combining wavelet transforms to feed forward artificial neural networks for ATM (Asynchronous Transfer Mode) traffic prediction. Wavelet transforms are used to preprocess the nonlinear time- series in order to provide a step-closer phase learning paradigm to the artificial neural network. The network uses a variable length time window on approximation coefficients over...
In this paper, a new threshold-based connection admission control scheme is proposed and analyzed. The scheme uses effective bandwidth for making decision about acceptance or rejection of a connection request. This threshold and effective bandwidth based method is simulated on an 8-node network model. The traffic used in the simulation is a multiplexed stream of cells from video, voice and data sources,...
This paper presents the Neural Indicates Explicit Rate (NIER) scheme, in which an artificial neural network (ANN) is used to obtain suitable Explicit Rate (ER) for congestion control of Available Bit Rate (ABR) service in ATM networks. The neural network used in this scheme will monitor the queue status in switches’ buffer and output suitable ER value to be carried by Resource Management (RM) cells...
This paper describes the ideas behind a new way of running Internet applications on an ATM network. ATM already contains some functionality of the network layer and therefore there is no need to duplicate them in the IP stack. Instead of adapting the TCP/IP stack to ATM at the bottom, we replace the TCP/IP stack with something else that is capable of supporting the QoS needs of applications. The intention...
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