Disjointed SRLG Routing for GMPLS Networks by Hierarchically Distributed PCE

Hiroshi MATSUURA; Naotaka MORITA; Tatsuro MURAKAMI; Kazumasa TAKAMI

doi:10.1093/ietcom/e90-b.1.51

Disjointed SRLG Routing for GMPLS Networks by Hierarchically Distributed PCE

Hiroshi MATSUURA, Naotaka MORITA, Tatsuro MURAKAMI, Kazumasa TAKAMI

Full Text Views

0

Share
Cite this

Summary :

Multilayered network interaction among various networks such as IP/MPLS packet networks and optical fiber networks are now achieved using generalized multiprotocol label switching (GMPLS) technology. One unique feature of GMPLS networks is that GMPLS packet-layer label switching paths (LSPs), such as IP/MPLS LSPs, sometimes tunnel through GMPLS lower layer LSPs such as optical fiber/lambda LSPs. One problem that occurs in this situation is protecting an important primary packet LSP by using a protection LSP that is physically separated from the primary LSP. The packet router has difficulty recognizing lower layer LSPs that are totally disjointed from the primary LSP. This is because, in a GMPLS's packet layer, a source router only differentiates one lower layer LSP from another, and does not check the disjointedness of segments through which the lower layer path passes. Sometimes, different lower LSPs pass through the same optical fiber, and a malfunction of one optical fiber sometimes causes many lower layer LSPs to malfunction at the same time. To solve this problem, a shared risk link group (SRLG) is introduced. Network links that belong to the same SRLG share a common physical resource. We apply this SRLG to the proposed hierarchically distributed path computation elements (HDPCEs) and achieve effective disjointed SRLG protection for important primary GMPLS packet paths.

Publication: IEICE TRANSACTIONS on Communications Vol.E90-B No.1 pp.51-62

Publication Date: 2007/01/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e90-b.1.51

Type of Manuscript: PAPER

Category: Internet

Cite this

Copy

Hiroshi MATSUURA, Naotaka MORITA, Tatsuro MURAKAMI, Kazumasa TAKAMI, "Disjointed SRLG Routing for GMPLS Networks by Hierarchically Distributed PCE" in IEICE TRANSACTIONS on Communications, vol. E90-B, no. 1, pp. 51-62, January 2007, doi: 10.1093/ietcom/e90-b.1.51.
Abstract: Multilayered network interaction among various networks such as IP/MPLS packet networks and optical fiber networks are now achieved using generalized multiprotocol label switching (GMPLS) technology. One unique feature of GMPLS networks is that GMPLS packet-layer label switching paths (LSPs), such as IP/MPLS LSPs, sometimes tunnel through GMPLS lower layer LSPs such as optical fiber/lambda LSPs. One problem that occurs in this situation is protecting an important primary packet LSP by using a protection LSP that is physically separated from the primary LSP. The packet router has difficulty recognizing lower layer LSPs that are totally disjointed from the primary LSP. This is because, in a GMPLS's packet layer, a source router only differentiates one lower layer LSP from another, and does not check the disjointedness of segments through which the lower layer path passes. Sometimes, different lower LSPs pass through the same optical fiber, and a malfunction of one optical fiber sometimes causes many lower layer LSPs to malfunction at the same time. To solve this problem, a shared risk link group (SRLG) is introduced. Network links that belong to the same SRLG share a common physical resource. We apply this SRLG to the proposed hierarchically distributed path computation elements (HDPCEs) and achieve effective disjointed SRLG protection for important primary GMPLS packet paths.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.1.51/_p

Copy

@ARTICLE{e90-b_1_51,
author={Hiroshi MATSUURA, Naotaka MORITA, Tatsuro MURAKAMI, Kazumasa TAKAMI, },
journal={IEICE TRANSACTIONS on Communications},
title={Disjointed SRLG Routing for GMPLS Networks by Hierarchically Distributed PCE},
year={2007},
volume={E90-B},
number={1},
pages={51-62},
abstract={Multilayered network interaction among various networks such as IP/MPLS packet networks and optical fiber networks are now achieved using generalized multiprotocol label switching (GMPLS) technology. One unique feature of GMPLS networks is that GMPLS packet-layer label switching paths (LSPs), such as IP/MPLS LSPs, sometimes tunnel through GMPLS lower layer LSPs such as optical fiber/lambda LSPs. One problem that occurs in this situation is protecting an important primary packet LSP by using a protection LSP that is physically separated from the primary LSP. The packet router has difficulty recognizing lower layer LSPs that are totally disjointed from the primary LSP. This is because, in a GMPLS's packet layer, a source router only differentiates one lower layer LSP from another, and does not check the disjointedness of segments through which the lower layer path passes. Sometimes, different lower LSPs pass through the same optical fiber, and a malfunction of one optical fiber sometimes causes many lower layer LSPs to malfunction at the same time. To solve this problem, a shared risk link group (SRLG) is introduced. Network links that belong to the same SRLG share a common physical resource. We apply this SRLG to the proposed hierarchically distributed path computation elements (HDPCEs) and achieve effective disjointed SRLG protection for important primary GMPLS packet paths.},
keywords={},
doi={10.1093/ietcom/e90-b.1.51},
ISSN={1745-1345},
month={January},}

Copy

TY - JOUR
TI - Disjointed SRLG Routing for GMPLS Networks by Hierarchically Distributed PCE
T2 - IEICE TRANSACTIONS on Communications
SP - 51
EP - 62
AU - Hiroshi MATSUURA
AU - Naotaka MORITA
AU - Tatsuro MURAKAMI
AU - Kazumasa TAKAMI
PY - 2007
DO - 10.1093/ietcom/e90-b.1.51
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2007
AB - Multilayered network interaction among various networks such as IP/MPLS packet networks and optical fiber networks are now achieved using generalized multiprotocol label switching (GMPLS) technology. One unique feature of GMPLS networks is that GMPLS packet-layer label switching paths (LSPs), such as IP/MPLS LSPs, sometimes tunnel through GMPLS lower layer LSPs such as optical fiber/lambda LSPs. One problem that occurs in this situation is protecting an important primary packet LSP by using a protection LSP that is physically separated from the primary LSP. The packet router has difficulty recognizing lower layer LSPs that are totally disjointed from the primary LSP. This is because, in a GMPLS's packet layer, a source router only differentiates one lower layer LSP from another, and does not check the disjointedness of segments through which the lower layer path passes. Sometimes, different lower LSPs pass through the same optical fiber, and a malfunction of one optical fiber sometimes causes many lower layer LSPs to malfunction at the same time. To solve this problem, a shared risk link group (SRLG) is introduced. Network links that belong to the same SRLG share a common physical resource. We apply this SRLG to the proposed hierarchically distributed path computation elements (HDPCEs) and achieve effective disjointed SRLG protection for important primary GMPLS packet paths.
ER -