Carrier ethernet

Reid, A.; Willis, Peter; Hawkins, I.; Bilton, C.

doi:10.1109/mcom.2008.4623713

Cited by 22 publications

(15 citation statements)

References 1 publication

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“…Each DRR scheduler has a time complexity of 0(1) [1]. If the hierarchical scheduler has L hierarchies or levels, it needs to establish a token path in L steps and thus the time complexity will be O(L).…”

Section: Pw(l)=i· /;mentioning

confidence: 99%

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Topology-based hierarchical scheduling using Deficit Round Robin: Flow protection and isolation for triple play service

Huang

Yan

Berger

2009

2009 First International Conference on Future Information Networks

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Abstract-This paper proposes a topology-based hierarchical scheduling scheme using Deficit Round Robin (DRR). The main idea of the topology-based hierarchical scheduling is to map the topology of the connected network into the logical structure of the scheduler, and combine several token schedulers according to the topology. The mapping process could be completed through the network management plane or by manual configuration. Based on the knowledge of the network, the scheduler can manage the traffic on behalf of other less advanced nodes, avoid potential traffic congestion, and provide flow protection and isolation. Comparisons between hierarchical scheduling, flowbased scheduling, and class-based scheduling schemes have been carried out under a symmetric tree topology. Results have shown that the hierarchical scheduling scheme provides better flow protection and isolation from attack of malicious traffic. This is significant for IPTV services in Carrier Ethernet networks.

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Section: Pw(l)=i· /;mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Topology-based hierarchical scheduling using Deficit Round Robin: Flow protection and isolation for triple play service

Huang

Yan

Berger

2009

2009 First International Conference on Future Information Networks

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“…Carrier Ethernet [3] offers functionality (such as QoS) typically only associated with circuitswitched carrier-grade transport. Where SONET/SDH offers deterministic multiplexing behavior because of fixed time slotting, frame-based Ethernet uses statistical multiplexing, which influences QoS performance; this is detailed in Section 2.…”

Section: Introductionmentioning

confidence: 99%

Impact of topology on layer 2 switched QoS sensitive services

Puype

Verbanck²,

Michielsen³

et al. 2010

2010 12th International Conference on Transparent Optical Networks

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High-bandwidth QoS sensitive services such as large scale video surveillance generally depend on provisioned capacity delivered by circuit-switched technology such as SONET/SDH. Yet development in layer 2 protocol sets and manageability extensions to Ethernet standards propose layer 2 packet switching technology as a viable, cheaper alternative to SONET/SDH. Layer 2 switched networks traditionally offer more complex topologies; in this paper we explain general QoS issues with layer 2 switching and show the impact of topology choice on service performance. Keywords: layer 2 switching, quality of service, topology. INTRODUCTIONElectronic circuit-switching technology has existed for quite some time, and was originally envisioned for telephony services. Circuit-switching has culminated into SONET/SDH technology, which offers a wide range of features that facilitate manageability, resilience and quality of service. As bandwidth needs grew larger, optical transmission was used in the physical layer. At the same time, required bandwidth of services grew larger as well. Of course one such service consists of best-effort TCP/IP packet transmission for internet connectivity. More interestingly, digital transmission also became popular for services that traditionally were carried over an analog encoding. Given the guaranteed high bandwidth needs and QoS constraints of such services such as video streaming, SONET/SDH is the obvious digital transmission technology.On the other hand, the packet switched TCP/IP layer model defines a packet (or frame) switched transport layer (layer 2). Ethernet and related IEEE defined physical layers are the de facto standard for TCP/IP transport. Yet development in layer 2 protocol sets and manageability extensions to Ethernet standards propose layer 2 packet switching technology as a viable, cheaper alternative to SONET/SDH. Furthermore, native optical transmission is available for higher (1 Gbit/s and up) bandwidth Ethernet standards.While circuit-switched technology is essentially connection-oriented by design, Ethernet is basically a connectionless protocol. Similar to how TCP/IP can be transformed into a connection-oriented network through the use of MPLS[1] (adding a shim header to TCP/IP packets), connection-oriented functionality can be added to Ethernet by adding a forwarding label to the Ethernet frame. The ongoing design of MPLS TP[2] (transport profile) is a result of a joint effort between ITU-T and IETF. MPLS TP removes features from MPLS not needed for pure connection-oriented operation.This paper looks at layer 2 switching technology -specifically Ethernet-as a viable alternative to SONET/SDH. Carrier Ethernet[3] offers functionality (such as QoS) typically only associated with circuitswitched carrier-grade transport. Where SONET/SDH offers deterministic multiplexing behavior because of fixed time slotting, frame-based Ethernet uses statistical multiplexing, which influences QoS performance; this is detailed in Section 2. The impact of more complex topology constructi...

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“…Under economic consideration, network operators consider not only the capability of the network, but also the corresponding cost to deploy such a network. It has been discussed in [2] that the Carrier Ethernet can greatly reduce the consequences of the complexity associated with the large scale of carriers' networks by being a cost-effective replacement for SONET/SDH. To keep this preferable feature and to reduce the required deploying period, the topology-based hierarchical scheduling scheme is proposed in this work.…”

Section: Introductionmentioning

confidence: 99%

IPTV traffic management using topology-based hierarchical scheduling in carrier ethernet transport networks

Huang

Yan

Berger

2009

2009 Fourth International Conference on Communications and Networking in China

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Abstract-Carrier Ethernet is becoming a favorable access technology for Next Generation Network (NGN). The features of cost-efficiency, operation flexibility and high bandwidth have a great attraction to service providers. However, to achieve these characteristics, Carrier Ethernet needs to have Quality of Service (QoS) provisioning abilities, which guarantee end-to-end performances of voice, video and data traffic delivered over networks. This paper introduces a topology-based hierarchical scheduler scheme, which controls the incoming traffic at the edge of the network based on the network topology. This work has been carried out as a part of the research project HIPT (High quality IP network for IPTV and VoIP) founded by Danish Advanced Technology Foundation.

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Carrier ethernet

Cited by 22 publications

References 1 publication

Topology-based hierarchical scheduling using Deficit Round Robin: Flow protection and isolation for triple play service

Topology-based hierarchical scheduling using Deficit Round Robin: Flow protection and isolation for triple play service

Impact of topology on layer 2 switched QoS sensitive services

IPTV traffic management using topology-based hierarchical scheduling in carrier ethernet transport networks

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