Real Time Tra c Management by Dynamic Bandwidth Allocation
نویسنده
چکیده
We introduce a six layer model of tra c variations and a corresponding model of management actions. In particular, we tra c study real time tra c management on the tra c and session levels which correspond to variations on the hour and minute levels. Using virtual paths (VPs) and virtual channels (VCs) as the managed entities on the two levels respectively, we put forward a simple and robust strategy for tra c management in real time: For slow variations, i.e. on the tra c level, all nodes simultaneously monitor o ered tra cs and forward the result to a network management centre (NMC); The NMC computes a new set of optimal VPs compares the result to the existing network; If a change appears pro table, the necessary information is sent back to the nodes and the new design is implemented. For fast variations, i.e. on the session level, dynamic routing schemes similar to those of public switched telephone networks are employed. Applying our strategy to control general networks subject to tra cs which in advance are known only as expectations, we develop simple methods for tra c observation, derive the optimal observation interval, brie y review algorithms to compute VP networks, develop a cost optimal test to determine whether to implement a new design or not, and derive the optimal updating interval. Running our strategy in a simulator, we discover a considerable adaptivity and a performance far better than obtained by alternative methods.
منابع مشابه
A Framework for Bandwidth Management and Call Admission Control in ATM Networks Sponsor: Sprint Corporation
One critical issue in tra c management of ATM networks is, to achieve the balance between two seemingly con icting goals: to guarantee the Quality of Service (QoS) for all service classes, while still allowing enough statistical sharing of bandwidth so that the network is e ciently utilized. Guaranteeing QoS requires tra c isolation, as well as allocation of enough network resource (e.g. bu er ...
متن کاملA Framework for Bandwidth Management and Call Admission Control in ATM Networks
One critical issue in tra c management of ATM networks is, to achieve the balance between two seemingly con icting goals: to guarantee the Quality of Service (QoS) for all service classes, while still allowing enough statistical sharing of bandwidth so that the network is e ciently utilized. Guaranteeing QoS requires tra c isolation, as well as allocation of enough network resource (e.g. bu er ...
متن کاملUse of CBR for IP over ATM
Internet tra c burstiness allows for statistical multiplexing gain in the available bandwidth of an ATM link. However, a dynamic allocation bandwidth assignment (ABR) has to be performed. In this paper we evaluate the real advantages of ABR versus CBR for Internet service provisioning. We consider performance parameters such as connection setup delay and active waiting time due to ow control an...
متن کاملReal - Time Implementation of an Adaptive Tra cShaper for Dynamic Bandwidth Allocation in ATMNetworksVinai
متن کامل
Content-based VBR Video Tra c Modeling and its Application to Dynamic Network Resource Allocation
In bandwidth limited networks and network interfaces, dynamic resource allocation can substantially increase the link utilization and also decrease the required network bu ering. In general, there are two important tradeo s e ecting the network utilization. First, tradeo between e ciency of the real-time dynamic resource allocation and the policy controlling the renegotiation frequency. Second,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1995