Engineering End-to-End IP Resilience Using Resilience-Differentiated QoS
نویسندگان
چکیده
Network resilience is becoming a key issue in the design of IP-based multimedia and multiservice networks. The current discussion about IP network resilience centers around MPLSbased recovery mechanisms. Any well designed recovery strategy has to take into account the different resilience requirements of the single traffic flows in order to avoid excessive usage of bandwidth for standby links. Faced with multiple recovery options, an ISP or NSP must decide which flows to protect to what extent against network failures. In this article an extension to existing Quality of Service (QoS) architectures is presented that integrates the signaling of resilience requirements with the traditional QoS signaling. We refer to this extended QoS model as Resilience-Differentiated QoS (RD-QoS). At the border of MPLS domains, the resilience requirements can then be directly mapped to the appropriate MPLS recovery options. A traffic engineering process for the provisioning of the resilience classes is introduced, and a case study demonstrates the significant network capacity savings achievable via this approach.
منابع مشابه
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 (MAI...
متن کاملA Fuzzy Based Three Color Meter/Marker for Diffserv Networks (RESEARCH NOTE)
Differentiated Services (Diffserv) which was proposed by Internet Engineering Task Force (IETF), is a scalable and robust model for providing the end-to-end QoS. In the Diffserv networks, metering mechanisms are used to measure traffic stream. The single rate Three Color Meter (srTCM) [1],which was proposed by IETF, meters an IP packet stream and marks its packets either green, yellow, or red....
متن کاملFault Tolerance and Resilience Issues in IP-Based Networks
A huge effort is currently put into the research of Quality of Service issues in the internet. Until recently, only little interest was given to the question of the resilience of IP based networks. However, with the growing commercial importance of the internet and the development of new real-time, connectionoriented services like streaming technologies or IP-telephony the resilience is becomin...
متن کاملDifferentiated Services and Integrated Services Use of MPLS
All the new emerging QoS service architectures are motivated by the desire to improve the overall performance of IP networks. Integrated Services (Intserv), Differentiated Services (Diffserv), MultiProtocol Label Switching (MPLS) and constraint-based routing are all technologies starting to coexist together in today’s Internet to provide means for the delivery of end-to-end QoS to applications ...
متن کاملPerformance indicators for supply chain resilience: review and conceptual framework
In the current competitive and dynamic market, customer demands and interests are changing continuously, and hence, risk of disruption in the supply chain is also increasing. To be successful in this scenario, supply chain of a firm should be resilient. Most of the firms realize that with a specific end goal to develop a resilient supply chain, there is a need for assessment of performance. The...
متن کامل