Modeling VC, VP and VN bandwidth assignment strategies in broadband networks

1997

IEEE Network

115

The recent move toward market deregulation and open competition has sparked a wave of serious introspection in the telecommunications service industry. Telecom providers and operators are now required to open up their primary revenue channels to competing industries. The competition for product differentiation increasingly depends on the level of sophistication, degree of flexibility, and speed of deployment of services that a future provider can offer. These factors in turn depend heavily on the flexibility of the software architecture in place in a provider's operational infrastructure. Within this context, we examine the service architecture of two major global communication networks-the Telephone Network and the Internet and explore their weaknesses and strengths. We discuss the realization of an open programmable networking environment based on a new service architecture for advanced telecommunication services that overcomes the limitations of the existing networks. Our approach to network programmability stems from two angles-one conceptual, the other implementational. In the first, we attempt to develop a service model that is open and reflects the economic market structure of the future telecommunications service industry. We believe that investigating such a model will help clarify some of the pertinent issues confronting the telecommunications service industry today as it comes of age. Furthermore, we introduce an extended reference model for realizing the service marketplace and present it as a vehicle for creating multimedia services with QoS guarantees. In the second, we investigate the feasibility of engineering the reference model from an implementation standpoint. We describe a realization of the open programmable networking environment as a broadband kernel. Called xbind, the broadband kernel incorporates IP and CORBA technologies for signaling, management, and service creation, and ATM for transport. We address some of the important QoS, performance, scalability, and implementation issues, fully aware that our work has opened new vistas that call for additional research.

Section: The Resource Allocation Modelmentioning

confidence: 99%

“…QoS support can be locally achieved via resource reservation algorithms. Recursive application of these algorithms along the capacitated graphs leads to a partitioning of network resources [31,33]. Resources here refer to both name space, bandwidth, and buffer space.…”

Section: The Resource Allocation Modelmentioning

confidence: 99%

Programming telecommunication networks

1997

IEEE Network

115

“…the VPN) can be achieved using the schemes described in [HYM91,ELW93]. Cell multiplexing among calls with different source-destination pairs can be performed based on the contract region concept [HYM94]. On the call-level, schemes for VP control (e.g.…”

Section: Customer Control and Management Objectivesmentioning

confidence: 99%

Customer Management and Control of Broadband VPN Services

Chan

Integrated Network Management V

Stadler

1997

We present an architecture for customer management and control of a broadband VPN service. The architecture is aimed at giving the VPN customer a high level of control over the traffic on the VPN, such that end-to-end requirements for the customer's enterprise network can be met. We describe how different control and management objectives can be achieved with this architecture. Its design includes a generic resource controller, which can be specialized in order to realize a large class of control schemes, following a customer's specific requirements. We have implemented a prototype of this architecture on a high-performance emulation platform. The prototype allows us to validate the management and control functionality of the customer control system and to demonstrate the performance characteristics of different realizations of the architecture.

“…At every node along the route of the VP, the necessary networking capacity must be secured from the output link that the VP is traversing. The networking capacity of links is described by the Schedulable Region (SR) [HYM91 ], and of VPs by the Contract Region (CR) [HYM93b]. Informally, the Schedulable Region is a surface in a k dimensional space (where k is the number of traffic classes), that describes the allowable combinations of cans from each traffic class that can be accepted on the link and be guaranteed Quality of Service.…”

Section: Vp Architecturementioning

confidence: 99%

Managing Virtual Paths on Xunet III: Architecture, Experimental Platform and Performance

Aneroussis

Integrated Network Management IV

1995

Self Cite

An architecture for integrating the Virtual Path service into the network management system of future broadband networks is presented. Complete definitions and behavioral descriptions of Managed Object Classes are given. An experimental platform on top of the XUNET Ill ATM network provides the proof of concept. The Xunet mana,ger is equipped with the necessary monitoring tools for evaluating the performance of the network and controls for changing the parameters of the VP connection services. Performance data from Xunet is presented to highlight the issues underlying the fundamentals of the operation of the VP management model such as the trade-offbetween throughput and call processing load.