Wyniki wyszukiwania - BazTech

1

System zarządzania jakością obsługi w sieci TCP/IP - architektura i implementacja

Jaskóła P.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2009

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nr 8-9

811-814

PL

Przedstawiono kompleksową metodę sterowania ruchem w sieci TCP/IP. Umożliwia ona zestawianie ścieżek o gwarantowanych parametrach jakościowych między dwoma wybranymi punktami brzegowymi znajdującymi się w obrębie tego samego systemu autonomicznego. Opisano architekturę systemu, którego centralnym elementem jest komputer pełniący rolę brokera przepływności oraz wyjaśniono istotę technik sterowania ruchem stosowanych w warstwie wykonawczej systemu. Przedstawiono oryginalną heurystykę umożliwijającą wyznaczanie polityki działania brokera. Omówiono wynik eksperymentu przeprowadzonego w sieci laboratoryjnej, ilustrujący działanie systemu.

EN

The paper presents the system for traffic egineering and Quality of Service differentiation in TCP/IP networks. It defines a control structure making use of existing standard networking technologies. The centralised controller enables near-optimal paths setup in an autonomous subsystem of the TCP/IP network. In the first part of the paper a system architecture is described, then an original heuristic algorithm for traffic control is presented. In the second part presented are the results of the experiments performed in an isolated autonomous systems.

2

Comparative evaluation of distributed Bandwidth Broker

Żmudziński P., Piechowiak M.

Image Processing & Communications

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2006

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Vol. 11, no 1

59-69

EN

The Differentiated Services (DS) framework is one of the basic architectures that have been proposed for provision in the Internet. One of the most significant advantages of DS is ability to distinguish management plane of the network to provide the customer Quality of Service. A DS architecture proposed by IETF alone is not sufficient to address the end-to-end guaranties in a network layer but it does show great potential for scalability. To fulfill negotiated QoS services Bandwidth Broker - an additional management entity, has to be implemented. The main tasks of the Broker are: limiting the traffic volume carried through the managed domain and services nego-tiation on behalf of domain with customers and adjacent brokers. The authors concentrated on the concept of distributed Broker as a more scalable and efficient solution. The different bandwidth allocation scenarios are presented and compared with regard to signaling overhead, admission control delay and control complexity. The quota-based admission control algorithm has been briefly described and discussed. The new style of reservation has been proposed to decrease the amount of signaling traffic between core and edge routers. The example of its functioning has been given at the end of the presented paper.

3

Bandwidth broker extension for optimal resource management

Sohail S., Jha S.

Journal of Telecommunications and Information Technology

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2003

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nr 2

77-82

EN

Bandwidth broker (BB), resource manager of differentiated services domain cannot provide per domain behavior (PDB) attribute information to customers and neighboring domains at the time of service level agreement (SLA) negotiation. Extending BB's functionality to calculate PDB attributes can help it to negotiate SLAs dynamically and efficiently. Using current measurements or historic data about PDB attributes, bandwidth broker can perform off-line analysis to evaluate the range of quality of service (QoS) parameters that its domain can offer. Using these values BB can perform optimal capacity planning of the links and provide better QoS guarantees.