draft-ietf-ccamp-flexi-grid-fwk-06.txt | draft-ietf-ccamp-flexi-grid-fwk-07.txt | |||
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CCAMP Working Group O. Gonzalez de Dios, Ed. | CCAMP Working Group O. Gonzalez de Dios, Ed. | |||
Internet-Draft Telefonica I+D | Internet-Draft Telefonica I+D | |||
Intended status: Informational R. Casellas, Ed. | Intended status: Informational R. Casellas, Ed. | |||
Expires: February 26, 2016 CTTC | Expires: March 2, 2016 CTTC | |||
August 25, 2015 | August 30, 2015 | |||
Framework and Requirements for GMPLS-based control of Flexi-grid DWDM | Framework and Requirements for GMPLS-based control of Flexi-grid DWDM | |||
networks | networks | |||
draft-ietf-ccamp-flexi-grid-fwk-06 | draft-ietf-ccamp-flexi-grid-fwk-07 | |||
Abstract | Abstract | |||
To allow efficient allocation of optical spectral bandwidth for high | To allow efficient allocation of optical spectral bandwidth for high | |||
bit-rate systems, the International Telecommunication Union | bit-rate systems, the International Telecommunication Union | |||
Telecommunication Standardization Sector (ITU-T) has extended its | Telecommunication Standardization Sector (ITU-T) has extended its | |||
Recommendations G.694.1 and G.872 to include a new dense wavelength | Recommendations G.694.1 and G.872 to include a new dense wavelength | |||
division multiplexing (DWDM) grid by defining a set of nominal | division multiplexing (DWDM) grid by defining a set of nominal | |||
central frequencies, channel spacings and the concept of "frequency | central frequencies, channel spacings and the concept of "frequency | |||
slot". In such an environment, a data plane connection is switched | slot". In such an environment, a data plane connection is switched | |||
skipping to change at page 1, line 48 | skipping to change at page 1, line 48 | |||
Internet-Drafts are working documents of the Internet Engineering | Internet-Drafts are working documents of the Internet Engineering | |||
Task Force (IETF). Note that other groups may also distribute | Task Force (IETF). Note that other groups may also distribute | |||
working documents as Internet-Drafts. The list of current Internet- | working documents as Internet-Drafts. The list of current Internet- | |||
Drafts is at http://datatracker.ietf.org/drafts/current/. | Drafts is at http://datatracker.ietf.org/drafts/current/. | |||
Internet-Drafts are draft documents valid for a maximum of six months | Internet-Drafts are draft documents valid for a maximum of six months | |||
and may be updated, replaced, or obsoleted by other documents at any | and may be updated, replaced, or obsoleted by other documents at any | |||
time. It is inappropriate to use Internet-Drafts as reference | time. It is inappropriate to use Internet-Drafts as reference | |||
material or to cite them other than as "work in progress." | material or to cite them other than as "work in progress." | |||
This Internet-Draft will expire on February 26, 2016. | This Internet-Draft will expire on March 2, 2016. | |||
Copyright Notice | Copyright Notice | |||
Copyright (c) 2015 IETF Trust and the persons identified as the | Copyright (c) 2015 IETF Trust and the persons identified as the | |||
document authors. All rights reserved. | document authors. All rights reserved. | |||
This document is subject to BCP 78 and the IETF Trust's Legal | This document is subject to BCP 78 and the IETF Trust's Legal | |||
Provisions Relating to IETF Documents | Provisions Relating to IETF Documents | |||
(http://trustee.ietf.org/license-info) in effect on the date of | (http://trustee.ietf.org/license-info) in effect on the date of | |||
publication of this document. Please review these documents | publication of this document. Please review these documents | |||
skipping to change at page 21, line 6 | skipping to change at page 21, line 6 | |||
4.5. Media Layer Resource Allocation Considerations | 4.5. Media Layer Resource Allocation Considerations | |||
A media channel has an associated effective frequency slot. From the | A media channel has an associated effective frequency slot. From the | |||
perspective of network control and management, this effective slot is | perspective of network control and management, this effective slot is | |||
seen as the "usable" end-to-end frequency slot. The establishment of | seen as the "usable" end-to-end frequency slot. The establishment of | |||
an LSP is related to the establishment of the media channel and the | an LSP is related to the establishment of the media channel and the | |||
configuration of the effective frequency slot. | configuration of the effective frequency slot. | |||
A "service request" is characterized (at a minimum) by its required | A "service request" is characterized (at a minimum) by its required | |||
effective frequency slot width. This does not preclude that the | effective slot width. This does not preclude that the request may | |||
request may add additional constraints such as also imposing the | add additional constraints such as also imposing the nominal central | |||
nominal central frequency. A given effective frequency slot may be | frequency. A given effective frequency slot may be requested for the | |||
requested for the media channel in the control plane LSP setup | media channel in the control plane LSP setup messages, and a specific | |||
messages, and a specific frequency slot can be requested on any | frequency slot can be requested on any specific hop of the LSP setup. | |||
specific hop of the LSP setup. Regardless of the actual encoding, | Regardless of the actual encoding, the LSP setup message specifies a | |||
the LSP setup message specifies a minimum effective frequency slot | minimum effective frequency slot width that needs to be fulfilled in | |||
width that needs to be fulfilled in order to successful establish the | order to successful establish the requsted LSP. | |||
requsted LSP. | ||||
An effective frequency slot must equally be described in terms of a | An effective frequency slot must equally be described in terms of a | |||
central nominal frequency and its slot width (in terms of usable | central nominal frequency and its slot width (in terms of usable | |||
spectrum of the effective frequency slot). That is, it must be | spectrum of the effective frequency slot). That is, it must be | |||
possible to determine the end-to-end values of the n and m | possible to determine the end-to-end values of the n and m | |||
parameters. We refer to this by saying that the "effective frequency | parameters. We refer to this by saying that the "effective frequency | |||
slot of the media channel/LSP must be valid". | slot of the media channel/LSP must be valid". | |||
In GMPLS the requested effective frequency slot is represented to the | In GMPLS the requested effective frequency slot is represented to the | |||
TSpec present in the RSVP-TE Path message, and the effective | TSpec present in the RSVP-TE Path message, and the effective | |||
End of changes. 4 change blocks. | ||||
13 lines changed or deleted | 12 lines changed or added | |||
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