A novel dynamic fault restoration mechanism using cluster allocation approach in WDM mesh networks

Hwang, I‐Shyan; Tu, Meng-Yuan; Tseng, Wang-Dauh; Shyu, Zen-Der

doi:10.1016/j.comcom.2006.07.009

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…To assign the transmission time to each ONU, the OLT runs a dynamic bandwidth allocation (DBA) which plays a key component of the EPON systems. During the last decade, many DBA refinements were proposed to improve the efficiency of the EPON upstream bandwidth in response to the ONU burst traffic requirement [8][9][10][11][12][13][14][15]. Although the power consumption of the TDM-EPON is the best among access network technology, it is still receiving considerable attention in the global energy-saving plan of modern telecommunication.…”

Section: Introductionmentioning

confidence: 99%

QoS-aware energy-efficient mechanism for sleeping mode ONUs in enhanced EPON

et al. 2015

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Ethernet passive optical network (EPON) is a broadband access time-division multiplexing passive optical network technology which can be referred to as green network, as it has less power consumption compared with other networks. The optical network unit (ONU) is the best candidate to implement energy-saving adjustments in EPON. Turning off the ONU transmitter (Tx)/receiver (Rx) for substantial time is a common method to achieve the energy saving. However, setting overlong sleep duration decreases the QoS, while short sleep duration increases the ONU power consumption. The challenging issue is how to balance the trade-off between achieving energy saving and guaranteeing QoS. In this paper, we introduce an enhanced EPON architecture and a QoS-aware energy-saving mechanism to reduce ONU energy consumption and guarantee an overall QoS metric based on the ITU-T standards requirements. To achieve the energy saving in the upstream/downstream direction, two sleep durations are defined for the ONU's Tx/Rx to generate four ONU modes including active, transmission, doze, and sleep. Simulation results show that the proposed scheme B I-Shyan Hwang improves the energy efficiency 44 % in average to fulfill the QoS metrics in terms of packet loss, delay and jitter, and the buffer requirement.

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Section: Introductionmentioning

confidence: 99%

QoS-aware energy-efficient mechanism for sleeping mode ONUs in enhanced EPON

et al. 2015

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“…In [11], finding an MC-tree with minimum cost in terms of minimized wavelength channels needed is equivalent to finding a Steiner tree in the corresponding MC network without an additional rerouting procedure in the tree construction. The nodes search for neighboring nodes and establish the relationship between them to build numerous logical clusters in [12]. Each cluster has a unique manager, called Cluster Head (CH) that searches for routing path, wavelength assignment (RWA), and restoration paths upon receiving requests from its cluster members.…”

Section: Introductionmentioning

confidence: 99%

“…Route optimization in sparse-splitting networks is discussed in [7][8][9][10] and existing multicast solutions for sparsesplitting WDM networks can be classified into two types: source-based trees [7,8] and MC-based trees [9][10][11][12]. Sourcebased multicast schemes build light-trees in a way similar to traditional IP multicast trees, with routing algorithm modifications for adapting to the sparse-splitting constraint.…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of multicast node placement for multicast routing in WDM networks with sparse light splitting

Hwang

Lin

2008

Photon Netw Commun

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This article examines all-optical multicast routing for wavelength-routed optical networks with sparse Multicast Capable (MC) nodes in two phases. The first phase is MC node placement and use of a simple and straightforward Maximum Path Count First (MPCF) algorithm to obtain candidates for MC nodes. The second phase is multicast routing with MC-based schemes that minimizes the number of wavelength channels with minimum transmission delay as required by a given multicast session, in that a light-tree is first constructed to connect MC nodes in a multicast group by using two algorithms, namely, the Pre-computing Minimum Cost (PMC) tree algorithm and the Pre-computing Shortest Path (PSP) tree algorithm. System performance of the proposed MPCF MC node placement algorithm is compared with that of the Normalized Cuts (NC) MC node placement algorithm for both PMC and PSP multicast routing. Furthermore, simulation results compare PMC and PSP multicast routing based on MPCF and NC node placement with Re-route-to-Source (RTS), Re-route-to-Any (RTA), Member-First (MF), and Member-Only (MO) multicast routing based on a light forest for a given multicast session in terms of average number of wavelengths needed, average blocking probability, and mean maximum transmission delay.

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A novel dynamic fault restoration mechanism using cluster allocation approach in WDM mesh networks

Cited by 2 publications

References 15 publications

QoS-aware energy-efficient mechanism for sleeping mode ONUs in enhanced EPON

QoS-aware energy-efficient mechanism for sleeping mode ONUs in enhanced EPON

Performance assessment of multicast node placement for multicast routing in WDM networks with sparse light splitting

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