by Mase, Kenichi; Ahn, Il-Soo; Fujii, Nobuo; Shim, Young-Chul

DOI: 10.1023/B:JONS.0000005684.62713.91
Print publication date: 12/1/2003
View article on SpringerLink

by

DOI: 10.1023/B:JONS.0000005682.96436.20
Print publication date: 12/1/2003
View article on SpringerLink

by

DOI: 10.1023/B:JONS.0000005683.28236.f5
Print publication date: 12/1/2003
View article on SpringerLink

by

DOI: 10.1023/B:JONS.0000005681.32288.6c
Print publication date: 12/1/2003
View article on SpringerLink

by Duarte, Elias Procópio; Madeira, Edmundo Roberto Mauro

DOI: 10.1023/B:JONS.0000005680.94718.58
Print publication date: 12/1/2003
View article on SpringerLink

by Mahajan, Manish; Parashar, Manish

The overall quality of network connections has a significant impact on the performance of networked applications. As a result, Quality-of-Service (QoS) management for networked multimedia applications over IP is a significant and immediate challenge. While differentiated services (DiffServ) provide a sense of resource allocation and QoS, they do not guarantee QoS. This paper presents the design, implementation and evaluation of a content-aware bandwidth broker (CABB) that manages QoS for multimedia applications in a DiffServ environment. CABB allocates network resources to multimedia flows based on client requirements, the adaptability of the application, and its tolerance to network level parameters such as bandwidth, delay, and latency. It has been implemented and evaluated using the NS-2 simulator toolkit. Evaluations show that CABB improves network resource allocations and increases overall throughput. Furthermore multimedia application flows are better managed and controlled, improving perceived QoS and avoiding possible congestion at core routers.

DOI: 10.1023/B:JONS.0000005474.43773.d8
Print publication date: 12/1/2003
View article on SpringerLink

by Lim, Teck Meng; Lee, Bu Sung; Yeo, Chai Kiat

The introduction of Differential Service architecture has initiated interests in centralized bandwidth reservation via an oracle with each network domain defining its own oracle. The centralized bandwidth reservation mechanism requires knowledge of network topology and reservation paths in the domain to control access to premium services as well as log usage. We propose a new reactive protocol, Path and Oracle Discovery Protocol (PODP), to facilitate the management of networks with centralized bandwidth reservations. This protocol discovers the routers traversed by the network connection request and the respective domain oracle. PODP is able to respond to network path changes at minimum network overhead and storage requirements compared to other methods. A prototype router and oracle supporting the PODP has been successfully developed and tested across multiple domains.

DOI: 10.1023/B:JONS.0000005473.29144.11
Print publication date: 12/1/2003
View article on SpringerLink

by Degrande, Natalie; Van Hoey, Gert; de La Vallée Poussin, Paloma; Van den Bosch, Sven

In this paper, an off-line traffic engineering algorithm is presented that optimizes the single-path routing of Label Switched Paths in a Differentiated Services IP domain by means of explicit, Multi-Protocol Label Switching controlled nonshortest paths. This algorithm allows traffic engineering up to 2500 traffic trunks in flat networks with sizes up to 150 nodes while supporting protection, pre-emption, quality-of-service, oversubscription, and resource class affinity. The algorithm with proper extensions can be applied to hierarchical networks, thus increasing the scalability properties for network size with a factor of about 50. First the single-area algorithm is detailed, then the concept and implementation of hierarchy is introduced for inter-area traffic engineering. These topics are illustrated with simulation results.

DOI: 10.1023/B:JONS.0000005472.61905.ca
Print publication date: 12/1/2003
View article on SpringerLink

by Asgari, Abolghasem (Hamid); Trimintzios, Panos; Irons, Mark; Egan, Richard; Pavlou, George

Deployment of quality-of-service (QoS) based value-added services in IP networks necessitates the use of traffic engineering. Traffic engineering allows service providers to use the network resources efficiently, according to the different quality levels associated with the range of services they offer. Traffic engineering relies typically on monitoring data for both “offline proactive” and “dynamic reactive” approaches. Monitoring data may be used for network provisioning, dynamic resource allocation, route management, and in-service performance verification for value-added IP services. A monitoring system should scale with the network size, the network speed, and the number of customers subscribed to use value-added IP services. This paper investigates the requirements of scalable monitoring system architectures, proposes principles for designing such systems and validates these principles through the design and implementation of a scalable monitoring system for traffic engineering and QoS delivery in IP Differentiated Services networks. Methods for assessing the relative merits of such monitoring systems are proposed. Experimental assessment results prove the scalability, accuracy, and also demonstrate the benefits of the proposed monitoring system.

DOI: 10.1023/B:JONS.0000005471.24268.d5
Print publication date: 12/1/2003
View article on SpringerLink

by Westphall, Carlos Becker; Sekkaki, Abderrahim; Alvarez, Luis Marco Cáceres; Watanabe, Wagner Tatsuya

Concepts and principles of TINA (Telecommunications Information Networking Architecture) are introduced with the objective of correcting problems of the current centralized service control and service data model in an IN (Intelligent Network). It is becoming increasingly clear that the future sophisticated telecommunication services, e.g., multimedia, and multi-party conferencing, breaking away from the traditional telephony call model will need the solutions for rapid and efficient introduction, deployment, operations, and management.In this paper, we discuss accounting features and requirements, as well as security services in the TINA management context. We will introduce and present an implementation of a model for a security management, based on secure objects, cryptography and certificate distribution. In order to provide secure services, secure objects that have security functionality, such as authentication and access control, have been defined. Secure objects in our model are CORBA objects. The security domain is also called SBS (Security Base Server), provides security services and has an SMIB (Security Management Information Base) that contains security policies, cryptographic algorithms, and other relevant information. A prototype has been implemented and some experimental results are presented.

DOI: 10.1023/B:JONS.0000005470.09708.f0
Print publication date: 12/1/2003
View article on SpringerLink