Dynamic resource configuration in DiffServ network: control plane mechanisms and performance evaluation of a Traffic Control API

Voice, video and multimedia applications are sensitive to the QoS provided by the underlying IP network. The DiffServ architecture offers a set of QoS mechanisms for IP networks

Dynamic resource configuration in DiffServ networks: Control plane mechanisms and performance evaluation of a traffic control API

Voice, video and multimedia applications are sensitive to the QoS provided by the underlying IP network. The DiffServ architecture offers a set of QoS mechanisms for IP networks. The "binding" of the applications QoS needs with the QoS features offered by the DiffServ networks is still an open problem. The simplest approach is to have a static configuration of QoS and therefore no direct interaction in the control plane between applications and QoS. We consider the advanced scenario, where the QoS mechanisms can be dynamically configured to follow the applications' need. For this scenario, a set of control plane interfaces needed for a whole end-to-end QoS architecture is defined. At the lower level, an internal interface ("Application Programming Interface"-API) in the QoS router is considered. This interface provides access to the DiffServ QoS mechanism available in a router and is used by the control logic running in the router itself. Then a QoS signaling protocol is considered, that allows external QoS clients to dynamically access the QoS services provided by the network. Finally the interaction of a session level signaling protocol (i.e., the SIP for IP telephony) with the QoS protocol is defined. A testbed implementation of the proposed architecture and a set of performance tests on the internal QoS API are reported. (C) 2003 Elsevier B.V. All rights reserved

SIP originated dynamic resource configuration in DiffServ networks: SIP/COPS/traffic control mechanisms

Voice, video and multimedia sessions are applications sensitive to the QoS provided by the underlying IP network. Therefore a lot of interest is currently devoted to the interaction of application level protocols with the QoS mechanism in IP networks. Among them SIP is currently having a lot of attention as a protocol for session signaling over the Internet. This work will describe an enhancement to SIP protocol for the interworking with a QoS enabled IP network. The proposed mechanism is simple and it fully preserves backward compatibility and interoperability with current SIP applications. Moreover the paper describes the application of this mechanism to a particular QoS enabled IP network, which implements DiffServ as transport mechanisms (the DiffServ mechanisms are obtained by means of Traffic Control functionalities with the TCAPI software libraries) and modified COPS clients for resource admission control. A test-bed implementation on Linux PCs of the proposed solutions is finally described

Dynamic resource configuration in DiffServ networks: control plane mechanisms and performance evaluation of a traffic control API

Voice, video and multimedia applications are sensitive to the QoS provided by the underlying IP network. The DiffServ architecture offers a set of QoS mechanisms for IP networks. The "binding" of the applications QoS needs with the QoS features offered by the DiffServ networks is still an open problem. The simplest approach is to have a static configuration of QoS and therefore no direct interaction in the control plane between applications and QoS. We consider the advanced scenario, where the QoS mechanisms can be dynamically configured to follow the applications' need. For this scenario, a set of control plane interfaces needed for a whole end-to-end QoS architecture is defined. At the lower level, an internal interface ("Application Programming Interface" - API) in the QoS router is considered. This interface provides access to the DiffServ QoS mechanism available in a router and is used by the control logic running in the router itself. Then a QoS signaling protocol is considered, that allows external QoS clients to dynamically access the QoS services provided by the network. Finally the interaction of a session level signaling protocol (i.e., the SIP for IP telephony) with the QoS protocol is defined. A testbed implementation of the proposed architecture and a set of performance tests on the internal QoS API are reported

Architecture and Protocols for the Seamless and Integrated Next Generation IP Networks

The paper presents a novel end-to-end seamless framework to support end-to-end Quality of Service and Traffic Engineering. The network model is based on the MPLS/DiffServ paradigm and addresses the definition of a network architecture according to both users and network providers requirements. A first solution relies on the centralized MPLS/DiffServ based Multi-protocol Access Inter-Domain (MAID) architecture. This architecture allows a seamless QoS-IP service setup through proper Users-Network Interfaces and inter-domain communication through Network-to-Network Interfaces. A fully distributed solution is also presented to address critical scalability issues and to improve network resilience. The overall architecture has been validated by means of functional tests carried out on operational testbeds based on Linux PC platforms

Architecture and protocols for the seamless and integrated next generation IP networks

Abstract. The paper presents a novel end-to-end seamless framework to support end-to-end Quality of Service and Traffic Engineering. The network model is based on the MPLS/DiffServ paradigm and addresses the definition of a network architecture according to both users and network providers requirements. A first solution relies on the centralized MPLS/DiffServ based Multi-protocol Access Inter-Domain (MAID) architecture. This architecture allows a seamless QoS-IP service setup through proper Users-Network Interfaces and inter-domain communication through Network-to-Network Interfaces. A fully distributed solution is also presented to address critical scalability issues and to improve network resilience. The overall architecture has been validated by means of functional tests carried out on operational testbeds based on Linux PC platforms.

Architecture and Protocols for the Seamless and Integrated Next Generation IP Networks

The paper presents a novel end-to-end seamless framework to support end-to-end Quality of Service and Traffic Engineering. The network model is based on the MPLS/DiffServ paradigm and addresses the definition of a network architecture according to both users and network providers requirements. A first solution relies on the centralized MPLS/DiffServ based Multi-protocol Access Inter-Domain (MAID) architecture. This architecture allows a seamless QoS-IP service setup through proper Users-Network Interfaces and inter-domain communication through Network-to-Network Interfaces. A fully distributed solution is also presented to address critical scalability issues and to improve network resilience. The overall architecture has been validated by means of functional tests carried out on operational testbeds based on Linux PC platforms

Architecture and protocols for the seamless and integrated next generation IP networks

The paper presents a novel end-to-end seamless framework to support end-to-end Quality of Service and Traffic Engineering. The network model is based on the MPLS/DiffServ paradigm and addresses the definition of a network architecture according to both users and network providers requirements. A first solution relies on the central- ized MPLS/DiffServ based Multi-protocol Access Inter-Domain (MAID) architecture. This architecture allows a seamless QoS-IP service setup through proper Users-Network Interfaces and inter-domain communica- tion through Network-to-Network Interfaces. A fully distributed solution is also presented to address critical scalability issues and to improve net- work resilience. The overall architecture has been validated by means of functional tests carried out on operational testbeds based on Linux PC platforms