Claus Gruber

Carrier Ethernet Transport in Metro and Core Networks

Presents a 130-slide tutorial on Carrier Ethernet Transport (CET). CET is not a single technology but a multilayer network architecture. It enables predictable packet transport networks and combines flexible electronic packet layer with cost-efficient optical layer. CET provides efficient multilayer traffic engineering (IP, Ethernet, NG-SDH/SONET, OTH/WDM)along with eEfficient end-to-end Quality of Service (QoS) and resilience and native transport of layer 2 services. CETs main forwarding technologies are: MPLS-TP, PBB-TE, ELS. The tutorial covers: Operator Requirements for Transport Networks; Ethernet Basics; Carrier Ethernet Evolution; Carrier Ethernet Transport Technologies; Carrier Ethernet Transport Network Architecture & Solutions; and Outlook Towards Future Internet Architectures.

Embedding optical ethernet services within the path computation element framework: The 100GET approach

We address the issues of inter-domain optical service provisioning with carrier-grade Ethernet and propose a multi-layer PCE based control plane architecture to implement adaptive advance reservation, which can significantly improve resource utilization and reduce blocking.

Adaptive advance reservation based inter-domain framework

There is a growing demand for end-to-end quality of service in present day multi-domain networks. IP/BGP is not equipped to support end-to-end QoS required by new upcoming services, and scalable QoS paradigms are required in lower layers to support future applications. Frequent fluctuations of available inter-domain resources inside a domain hinder the development of a scalable QoS routing paradigm. To address this, we propose a mechanism to create stable inter-domain topologies by employing adaptive advance reservation for inter-domain connections inside a domain. Advance reservation implies that capacity is pre-reserved for inter-domain traffic in the form of layer-2 tunnels, and simple policies are introduced to control the capacity of these tunnels. We study this proposal within the concept of the path computation element (PCE) framework and evaluate the performance of dynamic and adaptively advance-reserved inter-domain connections and topologies.

Concept and Evaluation of the Terminal Pair Available Bitrate (TPAB) for Disjoint Path Pairs

Transport network services can be offered by multiple paths that each accumulate to the desired service bitrate, falling back to lower bitrates upon failures. The paper evaluates this TPAB concept in a case study.