One document matched: draft-ietf-ccamp-rwa-wson-encode-02.txt
Differences from draft-ietf-ccamp-rwa-wson-encode-01.txt
Network Working Group G. Bernstein
Internet Draft Grotto Networking
Intended status: Standards Track Y. Lee
Expires: January 2010 D. Li
Huawei
W. Imajuku
NTT
July 10, 2009
Routing and Wavelength Assignment Information Encoding for
Wavelength Switched Optical Networks
draft-ietf-ccamp-rwa-wson-encode-02.txt
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Drafts.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html
This Internet-Draft will expire on January 10, 2007.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
Bernstein and Lee Expires January 10, 2010 [Page 1]
Internet-Draft Wavelength Switched Optical Networks July 2009
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
Abstract
A wavelength switched optical network (WSON) requires that certain
key information elements are made available to facilitate path
computation and the establishment of label switching paths (LSPs).
The information model described in "Routing and Wavelength Assignment
Information for Wavelength Switched Optical Networks" shows what
information is required at specific points in the WSON.
The information may be used in Generalized Multiprotocol Label
Switching (GMPLS) signaling protocols, and may be distributed by
GMPLS routing protocols. Other distribution mechanisms (for example,
XML-based protocols) may also be used.
This document provides efficient, protocol-agnostic encodings for the
information elements necessary to operate a WSON. It is intended that
protocol-specific documents will reference this memo to describe how
information is carried for specific uses.
Conventions used in this document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC-2119 [RFC2119].
Table of Contents
1. Introduction...................................................3
1.1. Revision History..........................................4
1.1.1. Changes from 00 draft................................4
1.1.2. Changes from 01 draft................................4
2. Terminology....................................................4
3. Common Field Encoding..........................................5
3.1. Link Set Field............................................5
3.2. Wavelength Information Encoding...........................7
3.3. Wavelength Set Field......................................8
3.3.1. Inclusive/Exclusive Wavelength Lists.................9
3.3.2. Inclusive/Exclusive Wavelength Ranges................9
3.3.3. Bitmap Wavelength Set...............................10
Bernstein and Lee Expires January 10, 2010 [Page 2]
Internet-Draft Wavelength Switched Optical Networks July 2009
4. Wavelength and Connectivity sub-TLV Encodings.................10
4.1. Available Wavelengths Sub-TLV............................11
4.2. Shared Backup Wavelengths Sub-TLV........................11
4.3. Connectivity Matrix Sub-TLV..............................11
4.4. Port Wavelength Restriction sub-TLV......................12
4.4.1. SIMPLE_WAVELENGTH...................................13
4.4.2. CHANNEL_COUNT.......................................14
4.4.3. WAVEBAND1...........................................14
4.4.4. SIMPLE_WAVELENGTH & CHANNEL_COUNT...................14
5. Wavelength Converter Pool Encoding............................15
5.1. Wavelength Converter Set Field...........................15
5.2. Wavelength Converter Accessibility Sub-TLV...............16
5.3. Wavelength Conversion Range Sub-TLV......................17
5.4. Wavelength Converter Usage State Sub-TLV.................18
6. WSON Encoding Usage Recommendations...........................19
6.1. WSON Node TLV............................................19
6.2. WSON Dynamic Node TLV....................................19
6.3. WSON Link TLV............................................20
6.4. WSON Dynamic Link TLV....................................20
7. Security Considerations.......................................20
8. IANA Considerations...........................................20
9. Acknowledgments...............................................21
APPENDIX A: Encoding Examples....................................22
A.1. Wavelength Set Field.....................................22
A.2. Connectivity Matrix Sub-TLV..............................22
A.3. Wavelength Converter Accessibility Sub-TLV...............26
A.4. Wavelength Conversion Range Sub-TLV......................28
10. References...................................................30
10.1. Normative References....................................30
10.2. Informative References..................................30
11. Contributors.................................................32
Authors' Addresses...............................................32
Intellectual Property Statement..................................33
Disclaimer of Validity...........................................34
1. Introduction
A Wavelength Switched Optical Network (WSON) is a Wavelength Division
Multiplexing (WDM) optical network in which switching is performed
selectively based on the center wavelength of an optical signal.
[WSON-Frame] describes a framework for Generalized Multiprotocol
Label Switching (GMPLS) and Path Computation Element (PCE) control of
a WSON. Based on this framework, [WSON-Info] describes an information
model that specifies what information is needed at various points in
Bernstein and Lee Expires January 10, 2010 [Page 3]
Internet-Draft Wavelength Switched Optical Networks July 2009
a WSON in order to compute paths and establish Label Switched Paths
(LSPs).
This document provides efficient encodings of information needed by
the routing and wavelength assignment (RWA) process in a WSON. Such
encodings can be used to extend GMPLS signaling and routing
protocols. In addition these encodings could be used by other
mechanisms to convey this same information to a path computation
element (PCE). Note that since these encodings are relatively
efficient they can provide more accurate analysis of the control
plane communications/processing load for WSONs looking to utilize a
GMPLS control plane.
1.1. Revision History
1.1.1. Changes from 00 draft
Edits to make consistent with update to [Otani], i.e., removal of
sign bit.
Clarification of TBD on connection matrix type and possibly
numbering.
New sections for wavelength converter pool encoding: Wavelength
Converter Set Sub-TLV, Wavelength Converter Accessibility Sub-TLV,
Wavelength Conversion Range Sub-TLV, WC Usage State Sub-TLV.
Added optional wavelength converter pool TLVs to the composite node
TLV.
1.1.2. Changes from 01 draft
The encoding examples have been moved to an appendix. Classified and
corrected information elements as either reusable fields or sub-TLVs.
Updated Port Wavelength Restriction sub-TLV. Added available
wavelength and shared backup wavelength sub-TLVs. Changed the title
and scope of section 6 to recommendations since the higher level TLVs
that this encoding will be used in is somewhat protocol specific.
2. Terminology
CWDM: Coarse Wavelength Division Multiplexing.
DWDM: Dense Wavelength Division Multiplexing.
FOADM: Fixed Optical Add/Drop Multiplexer.
Bernstein and Lee Expires January 10, 2010 [Page 4]
Internet-Draft Wavelength Switched Optical Networks July 2009
ROADM: Reconfigurable Optical Add/Drop Multiplexer. A reduced port
count wavelength selective switching element featuring ingress and
egress line side ports as well as add/drop side ports.
RWA: Routing and Wavelength Assignment.
Wavelength Conversion. The process of converting an information
bearing optical signal centered at a given wavelength to one with
"equivalent" content centered at a different wavelength. Wavelength
conversion can be implemented via an optical-electronic-optical (OEO)
process or via a strictly optical process.
WDM: Wavelength Division Multiplexing.
Wavelength Switched Optical Network (WSON): A WDM based optical
network in which switching is performed selectively based on the
center wavelength of an optical signal.
3. Common Field Encoding
In encoding WSON information both sets of links and sets of
wavelengths frequently arise. In the following we specify the
encoding of these repeatedly used fields.
3.1. Link Set Field
We will frequently need to describe properties of groups of links. To
do so efficiently we can make use of a link set concept similar to
the label set concept of [RFC3471]. All links will be denoted by
their local link identifier as defined an used in [RFC4202],
[RFC4203], and [RFC5307].The information carried in a Link Set is
defined by:
Bernstein and Lee Expires January 10, 2010 [Page 5]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action |Dir| Format | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Identifier 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: : :
: : :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Identifier N |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Action: 8 bits
0 - Inclusive List
Indicates that one or more link identifiers are included in the Link
Set. Each identifies a separate link that is part of the set.
1 - Inclusive Range
Indicates that the Link Set defines a range of links. It contains
two link identifiers. The first identifiers indicates the start of
the range (inclusive). The second identifiers indicates the end of
the range (inclusive). All links with numeric values between the
bounds are considered to be part of the set. A value of zero in
either position indicates that there is no bound on the corresponding
portion of the range. Note that the Action field can be set to
0x02(Inclusive Range) only when unnumbered link identifier is used.
Dir: Directionality of the Link Set (2 bits)
0 -- bidirectional
1 -- incoming
2 -- outgoing
In optical networks we think in terms of unidirectional as well as
bidirectional links. For example, wavelength restrictions or
connectivity may be different for an ingress port, than for its
"companion" egress port if one exists. Note that "interfaces" such as
those discussed in the Interfaces MIB [RFC2863] are assumed to be
Bernstein and Lee Expires January 10, 2010 [Page 6]
Internet-Draft Wavelength Switched Optical Networks July 2009
bidirectional. This also applies to the links advertised in various
link state routing protocols.
Format: The format of the link identifier (6 bits)
0 -- Link Local Identifier
Indicates that the links in the Link Set are identified by link local
identifiers. All link local identifiers are supplied in the context
of the advertising node.
1 -- Local Interface IPv4 Address
2 -- Local Interface IPv6 Address
Indicates that the links in the Link Set are identified by Local
Interface IP Address. All Local Interface IP Address are supplied in
the context of the advertising node.
Others TBD.
Note that all link identifiers in the same list must be of the same
type.
Length: 16 bits
This field indicates the total length of the Link Set field.
Link Identifier: length is dependent on the link format
The link identifier represents the port which is being described
either for connectivity or wavelength restrictions. This can be the
link local identifier of [RFC4202], GMPLS routing, [RFC4203] GMPLS
OSPF routing, and [RFC5307] IS-IS GMPLS routing. The use of the link
local identifier format can result in more compact WSON encodings
when the assignments are done in a reasonable fashion.
3.2. Wavelength Information Encoding
This document makes frequent use of the lambda label format defined
in [Otani] shown below strictly for reference purposes:
Bernstein and Lee Expires January 10, 2010 [Page 7]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Where
Grid is used to indicate which ITU-T grid specification is being
used.
C.S. = Channel spacing used in a DWDM system, i.e., with a ITU-T
G.694.1 grid.
n = Used to specify the frequency as 193.1THz +/- n*(channel spacing)
and n is an integer to take either a negative, zero or a positive
value.
3.3. Wavelength Set Field
Wavelength sets come up frequently in WSONs to describe the range of
a laser transmitter, the wavelength restrictions on ROADM ports, or
the availability of wavelengths on a DWDM link. The general format
for a wavelength set is given below. This format uses the Action
concept from [RFC3471] with an additional Action to define a "bit
map" type of label set. Note that the second 32 bit field is a lambda
label in the previously defined format. This provides important
information on the WDM grid type and channel spacing that will be
used in the compact encodings listed.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action| Num Wavelengths | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n for lowest frequency |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Additional fields as necessary per action |
|
Action:
0 - Inclusive List
1 - Exclusive List
Bernstein and Lee Expires January 10, 2010 [Page 8]
Internet-Draft Wavelength Switched Optical Networks July 2009
2 - Inclusive Range
3 - Exclusive Range
4 - Bitmap Set
3.3.1. Inclusive/Exclusive Wavelength Lists
In the case of the inclusive/exclusive lists the wavelength set
format is given by:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 or 1 | Num Wavelengths | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n for lowest frequency |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| n2 | n3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| nm | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Where Num Wavelengths tells us the number of wavelength in this
inclusive or exclusive list this does not include the initial
wavelength in the list hence if the number of wavelengths is odd then
zero padding of the last half word is required.
3.3.2. Inclusive/Exclusive Wavelength Ranges
In the case of inclusive/exclusive ranges the wavelength set format
is given by:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|2 or 3 | Num Wavelengths | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n for lowest frequency |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bernstein and Lee Expires January 10, 2010 [Page 9]
Internet-Draft Wavelength Switched Optical Networks July 2009
In this case Num Wavelengths specifies the number of wavelengths in
the range starting at the given wavelength and incrementing the Num
Wavelengths number of channel spacing up in frequency.
3.3.3. Bitmap Wavelength Set
In the case of Action = 4, the bitmap the wavelength set format is
given by:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 4 | Num Wavelengths | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n for lowest frequency |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Bit Map Word #1 (Lowest frequency channels) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Bit Map Word #N (Highest frequency channels) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Where Num Wavelengths in this case tells us the number of wavelengths
represented by the bit map. Each bit in the bit map represents a
particular frequency with a value of 1/0 indicating whether the
frequency is in the set or not. Bit position zero represents the
lowest frequency, while each succeeding bit position represents the
next frequency a channel spacing (C.S.) above the previous.
The size of the bit map is clearly Num Wavelengths bits, but the bit
map is made up to a full multiple of 32 bits so that the TLV is a
multiple of four bytes. Bits that do not represent wavelengths (i.e.,
those in positions (Num Wavelengths - 1) and beyond) SHOULD be set to
zero and MUST be ignored.
4. Wavelength and Connectivity sub-TLV Encodings
A type-length-value (TLV) encoding of the high level WSON information
model [WSON-Info] is given in the following sections. This encoding
is designed to be suitable for use in the GMPLS routing protocols
OSPF [RFC4203] and IS-IS [RFC5307] and in the PCE protocol PCEP
[PCEP]. Note that the information distributed in [RFC4203] and
[RFC5307] is arranged via the nesting of sub-TLVs within TLVs and
this document makes use of such constructs.
Bernstein and Lee Expires January 10, 2010 [Page 10]
Internet-Draft Wavelength Switched Optical Networks July 2009
4.1. Available Wavelengths Sub-TLV
To indicate the wavelengths available for use on a link the Available
Wavelengths sub-TLV consists of a single variable length wavelength
set field as follows:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Wavelength Set Field |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
4.2. Shared Backup Wavelengths Sub-TLV
To indicate the wavelengths available for shared backup use on a link
the Shared Backup Wavelengths sub-TLV consists of a single variable
length wavelength set field as follows:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Wavelength Set Field |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
4.3. Connectivity Matrix Sub-TLV
The switch and fixed connectivity matrices of [WSON-Info] can be
compactly represented in terms of a minimal list of ingress and
egress port set pairs that have mutual connectivity. As described in
[Switch] such a minimal list representation leads naturally to a
graph representation for path computation purposes that involves the
fewest additional nodes and links.
A TLV encoding of this list of link set pairs is:
Bernstein and Lee Expires January 10, 2010 [Page 11]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Connectivity | MatrixID | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Set A #1 |
: : :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Set B #1 :
: : :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Additional Link set pairs as needed |
: to specify connectivity :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Where
Connectivity is the device type.
0 -- the device is fixed
1 -- the device is switched(e.g., ROADM/OXC)
MatrixID represents the ID of the connectivity matrix and is an 8 bit
integer. The value of 0xFF is reserved for use with port wavelength
constraints and should not be used to identify a connectivity matrix.
4.4. Port Wavelength Restriction sub-TLV
The port wavelength restriction of [WSON-Info] can be encoded as a
sub-TLV as follows. More than one of these sub-TLVs may be needed to
fully specify a complex port constraint. When more than one of these
sub-TLVs are present the resulting restriction is the intersection of
the restrictions expressed in each sub-TLV. To indicate that a
restriction applies to the port in general and not to a specific
connectivity matrix use the reserved value of 0xFF for the MatrixID.
Bernstein and Lee Expires January 10, 2010 [Page 12]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MatrixID | RestrictionType | Reserved/Parameter |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Additional Restriction Parameters per RestrictionType |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Where:
MatrixID: either is the value in the corresponding Connectivity
Matrix sub-TLV or takes the value OxFF to indicate the restriction
applies to the port regardless of any Connectivity Matrix.
RestrictionType can take the following values and meanings:
0: SIMPLE_WAVELENGTH (Simple wavelength selective restriction)
1: CHANNEL_COUNT (Channel count restriction)
2: WAVEBAND1 (Waveband device with a tunable center frequency
and passband)
3: SIMPLE_WAVELENGTH & CHANNEL_COUNT (Combination of
SIMPLE_WAVELENGTH and CHANNEL_COUNT restriction. The
accompanying wavelength set and channel count indicate
wavelength permitted on the port and the maximum number of
channels that can be simultaneously used on the port)
4.4.1. SIMPLE_WAVELENGTH
In the case of the SIMPLE_WAVELENGTH the GeneralPortRestrictions (or
MatrixSpecificRestrictions) format is given by:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MatrixID | RstType = 0 | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Wavelength Set Field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bernstein and Lee Expires January 10, 2010 [Page 13]
Internet-Draft Wavelength Switched Optical Networks July 2009
In this case the accompanying wavelength set indicates the
wavelengths permitted on the port.
4.4.2. CHANNEL_COUNT
In the case of the CHANNEL_COUNT the format is given by:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MatrixID | RstType = 1 | MaxNumChannels |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
In this case the accompanying MaxNumChannels indicates the maximum
number of channels that can be simultaneously used on the
port/matrix.
4.4.3. WAVEBAND1
In the case of the WAVEBAND1 the GeneralPortRestrictions (or
MatrixSpecificRestrictions) format is given by:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MatrixID | RstType = 2 | MaxWaveBandWidth |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Wavelength Set |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
In this case the accompanying MaxWaveBandWidth indicates the maximum
width of the waveband in terms of the channels spacing given in the
wavelength set. The corresponding wavelength set is used to indicate
the overall tuning range. Specific center frequency tuning
information can be obtained from dynamic channel in use information.
It is assumed that both center frequency and bandwidth (Q) tuning can
be done without causing faults in existing signals.
4.4.4. SIMPLE_WAVELENGTH & CHANNEL_COUNT
In the case of the SIMPLE_WAVELENGTH & CHANNEL_COUNT the format is
given by:
Bernstein and Lee Expires January 10, 2010 [Page 14]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MatrixInfo | RstType = 3 | MaxNumChannels |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Wavelength Set Field |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
In this case the accompanying wavelength set and MaxNumChannels
indicate wavelength permitted on the port and the maximum number of
channels that can be simultaneously used on the port.
5. Wavelength Converter Pool Encoding
The encoding of structure and properties of a general wavelength
converter pool utilizes a converter accessibility sub-TLV, a
wavelength converter range sub-TLV, and a wavelength converter state
sub-TLV. All these sub-TLVs make use of the wavelength converter set
field.
5.1. Wavelength Converter Set Field
A WSON node may include a set of wavelength converters (WC) and such
information frequently is used in describing the wavelength converter
pool and its properties. The WC Set field is defined in a similar
manner to the label set concept of [RFC3471].
The information carried in a WC set field is defined by:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action | Reserved | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC Identifier 1 | WC Identifier 2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: : :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC Identifier n-1 | WC Identifier n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Action: 8 bits
0 - Inclusive List
Bernstein and Lee Expires January 10, 2010 [Page 15]
Internet-Draft Wavelength Switched Optical Networks July 2009
Indicates that the TLV contains one or more WC elements that are
included in the list.
2 - Inclusive Range
Indicates that the TLV contains a range of WCs. The object/TLV
contains two WC elements. The first element indicates the start of
the range. The second element indicates the end of the range. A value
of zero indicates that there is no bound on the corresponding portion
of the range.
Reserved: 8 bits
This field is reserved. It MUST be set to zero on transmission and
MUST be ignored on receipt.
Length: 16 bits
The total length of this field in bytes.
WC Identifier:
The WC identifier represents the ID of the wavelength convertor which
is a 16 bit integer.
5.2. Wavelength Converter Accessibility Sub-TLV
This sub-TLV describes the structure of the wavelength converter pool
in relation to the switching device. In particular it gives the
ability of an ingress port to reach a wavelength converter and of a
wavelength converter to reach a particular egress port. This is the
PoolIngressMatrix and PoolEgressMatrix of [WSON-Info].
The wavelength converter accessibility sub-TLV is defined by:
Bernstein and Lee Expires January 10, 2010 [Page 16]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Ingress Link Set Field A #1 |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC Set Field A #1 |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Additional Link set and WC set pairs as needed to |
: specify PoolIngressMatrix :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC Set B Field #1 (for egress connectivity) |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Egress link Set Field B #1 |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Additional WC set and egress link set pairs |
: as needed to specify PoolEgressMatrix :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note that the direction parameter within the Link Set Field is used
to indicate whether the link set is an ingress or egress link set.
5.3. Wavelength Conversion Range Sub-TLV
Wavelength converters may have a limited input or output range.
Additionally, due to the structure of the optical system not all
wavelengths can necessarily reach or leave all the converters. These
properties are described by using one or more wavelength conversion
sub-TLVs as defined below:
Bernstein and Lee Expires January 10, 2010 [Page 17]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC Set Field |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Input Wavelength Set Field |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Output Wavelength Set Field |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
WC Set Field:
A set of wavelength converters (WCs) which have the same conversion
range.
Input Wavelength Set Field:
Indicates the wavelength input range of the WCs in the corresponding
WC set.
Output Wavelength Set Field:
Indicates the wavelength output range of WCs in the corresponding WC
set.
5.4. Wavelength Converter Usage State Sub-TLV
The usage state of a wavelength converter is encoded as a bit map
indicating whether the converter is available or in use. This
information can be relatively dynamic, i.e., can change when a
connection is established or torn down. This bit map is in
correspondence with a wavelength converter set as follows:
Bernstein and Lee Expires January 10, 2010 [Page 18]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC Set Field |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC Usage state bitmap |
: :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ...... | Padding bits |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
WC Usage state: Variable Length but must be a multiple of 4 byes.
Each bit indicates the usage status of one WC with 0 indicating the
WC is available and 1 indicating the WC is in used. The sequence of
the bit map is ordered according to the WC Set field with this sub-
TLV.
Padding bits: Variable Length
6. WSON Encoding Usage Recommendations
In this section we give recommendations of typical usage of the
previously defined sub-TLVs. Typically the sub-TLVs defined in the
preceding sections would be incorporated into some kind of composite
TLV. The example composite TLVs in the following sections are based
on the four high level information bundles of [WSON-Info].
6.1. WSON Node TLV
The WSON Node TLV could consist of the following list of sub-TLVs:
<Node_Info> ::= <Node_ID>[Other GMPLS sub-
TLVs][<ConnectivityMatrix>...]
[<WavelengthConverterPool>][<WCPoolState>]
6.2. WSON Dynamic Node TLV
If the protocol supports the separation of dynamic information from
relatively static information then the wavelength converter pool
state can be separated from the general Node TLV into a dynamic Node
TLV as follows.
<NodeInfoDynamic> ::= <NodeID> [<WCPoolState>]
Bernstein and Lee Expires January 10, 2010 [Page 19]
Internet-Draft Wavelength Switched Optical Networks July 2009
Note that currently the only dynamic information modeled with a node
is associated with the status of the wavelength converter pool.
6.3. WSON Link TLV
The new link related sub-TLVs could be incorporated into a composite
link TLV as follows:
<LinkInfo> ::= <LinkID> [Other GMPLS sub-TLVs]
<[PortWavelengthRestriction>...][<AvailableWavelengths>]
[<SharedBackupWavelengths>]
6.4. WSON Dynamic Link TLV
If the protocol supports the separation of dynamic information from
relatively static information then the available wavelength and
shared backup status can be separated from the general link TLV into
a TLV for dynamic link information.
<DynamicLinkInfo> ::= <LinkID> <AvailableWavelengths>
[<SharedBackupWavelengths>]
Where
<LinkID> ::= <LocalLinkID> <LocalNodeID> <RemoteLinkID>
<RemoteNodeID>
7. Security Considerations
This document defines protocol-independent encodings for WSON
information and does not introduce any security issues.
However, other documents that make use of these encodings within
protocol extensions need to consider the issues and risks associated
with, inspection, interception, modification, or spoofing of any of
this information. It is expected that any such documents will
describe the necessary security measures to provide adequate
protection.
8. IANA Considerations
TBD. Once our approach is finalized we may need identifiers for the
various TLVs and sub-TLVs.
Bernstein and Lee Expires January 10, 2010 [Page 20]
Internet-Draft Wavelength Switched Optical Networks July 2009
9. Acknowledgments
This document was prepared using 2-Word-v2.0.template.dot.
Bernstein and Lee Expires January 10, 2010 [Page 21]
Internet-Draft Wavelength Switched Optical Networks July 2009
APPENDIX A: Encoding Examples
[Editors note: these examples will be revised once the changes to the
encodings settle down.]
A.1. Wavelength Set Field
Example:
A 40 channel C-Band DWDM system with 100GHz spacing with lowest
frequency 192.0THz (1561.4nm) and highest frequency 195.9THz
(1530.3nm). These frequencies correspond to n = -11, and n = 28
respectively. Now suppose the following channels are available:
Frequency (THz) n Value bit map position
--------------------------------------------------
192.0 -11 0
192.5 -6 5
193.1 0 11
193.9 8 19
194.0 9 20
195.2 21 32
195.8 27 38
With the Grid value set to indicate an ITU-T G.694.1 DWDM grid, C.S.
set to indicate 100GHz this lambda bit map set would then be encoded
as follows:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 4 | Num Wavelengths = 40 | Length = 16 bytes |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n for lowest frequency = -11 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 0 0 0 0 0 1 0| Not used in 40 Channel system (all zeros) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
A.2. Connectivity Matrix Sub-TLV
Example:
Bernstein and Lee Expires January 10, 2010 [Page 22]
Internet-Draft Wavelength Switched Optical Networks July 2009
Suppose we have a typical 2-degree 40 channel ROADM. In addition to
its two line side ports it has 80 add and 80 drop ports. The picture
below illustrates how a typical 2-degree ROADM system that works with
bi-directional fiber pairs is a highly asymmetrical system composed
of two unidirectional ROADM subsystems.
(Tributary) Ports #3-#42
Ingress added to Egress dropped from
West Line Egress East Line Ingress
vvvvv ^^^^^
| |||.| | |||.|
+-----| |||.|--------| |||.|------+
| +----------------------+ |
| | | |
Egress | | Unidirectional ROADM | | Ingress
-----------------+ | | +--------------
<=====================| |===================<
-----------------+ +----------------------+ +--------------
| |
Port #1 | | Port #2
(West Line Side) | |(East Line Side)
-----------------+ +----------------------+ +--------------
>=====================| |===================>
-----------------+ | Unidirectional ROADM | +--------------
Ingress | | | | Egress
| | _ | |
| +----------------------+ |
+-----| |||.|--------| |||.|------+
| |||.| | |||.|
vvvvv ^^^^^
(Tributary) Ports #43-#82
Egress dropped from Ingress added to
West Line ingress East Line egress
Referring to the figure we see that the ingress direction of ports
#3-#42 (add ports) can only connect to the egress on port #1. While
the ingress side of port #2 (line side) can only connect to the
egress on ports #3-#42 (drop) and to the egress on port #1 (pass
through). Similarly, the ingress direction of ports #43-#82 can only
connect to the egress on port #2 (line). While the ingress direction
of port #1 can only connect to the egress on ports #43-#82 (drop) or
port #2 (pass through). We can now represent this potential
Bernstein and Lee Expires January 10, 2010 [Page 23]
Internet-Draft Wavelength Switched Optical Networks July 2009
connectivity matrix as follows. This representation uses only 30 32-
bit words.
Bernstein and Lee Expires January 10, 2010 [Page 24]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Conn = 1 | MatrixID | Reserved |1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: adds to line
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=2 |0 1|0 0 0 0 0 0|Reserved(Note:inclusive range) |2
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #3 |3
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #42 |4
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |1 0|0 0 0 0 0 0|Reserved (Note:inclusive list) |5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #1 |6
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: line to drops
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |0 1|0 0 0 0 0 0|Reserved (Note:inclusive list) |7
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #2 |8
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=2 |1 0|0 0 0 0 0 0|Reserved(Note: inclusive range)|9
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #3 |10
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #42 |11
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: line to line
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |0 1|0 0 0 0 0 0|Reserved (Note:inclusive list) |12
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #2 |13
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |1 0|0 0 0 0 0 0|Reserved(Note: inclusive range)|14
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #1 |15
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: adds to line
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=2 |0 1|0 0 0 0 0 0|Reserved(Note:inclusive range) |16
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #42 |17
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bernstein and Lee Expires January 10, 2010 [Page 25]
Internet-Draft Wavelength Switched Optical Networks July 2009
| Link Local Identifier = #82 |18
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |1 0|0 0 0 0 0 0|Reserved (Note:inclusive list) |19
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #2 |20
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: line to drops
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |0 1|0 0 0 0 0 0|Reserved (Note:inclusive list) |21
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #1 |22
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=2 |1 0|0 0 0 0 0 0|Reserved(Note: inclusive range)|23
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #43 |24
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #82 |25
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: line to line
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |0 1|0 0 0 0 0 0|Reserved (Note:inclusive list) |26
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #1 |27
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |1 0|0 0 0 0 0 0|Reserved(Note: inclusive range)|28
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #2 |30
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
A.3. Wavelength Converter Accessibility Sub-TLV
Example:
Figure 1 shows a wavelength converter pool architecture know as
"shared per fiber". In this case the ingress and egress pool matrices
are simply:
Bernstein and Lee Expires January 10, 2010 [Page 26]
Internet-Draft Wavelength Switched Optical Networks July 2009
+-----+ +-----+
| 1 1 | | 1 0 |
WI =| |, WE =| |
| 1 1 | | 0 1 |
+-----+ +-----+
+-----------+ +------+
| |--------------------->| |
| |--------------------->| C |
/| | |--------------------->| o | E1
I1 /D+--->| |--------------------->| m |
+ e+--->| | | b |========>
========>| M| | Optical | +-----------+ | i | Port #3
Port #1 + u+--->| Switch | | WC Pool | | n |
\x+--->| | | +-----+ | | e |
\| | +----+->|WC #1|--+---->| r |
| | | +-----+ | +------+
| | | | +------+
/| | | | +-----+ | | |
I2 /D+--->| +----+->|WC #2|--+---->| C | E2
+ e+--->| | | +-----+ | | o |
========>| M| | | +-----------+ | m |========>
Port #2 + u+--->| | | b | Port #4
\x+--->| |--------------------->| i |
\| | |--------------------->| n |
| |--------------------->| e |
| |--------------------->| r |
+-----------+ +------+
Figure 1 An optical switch featuring a shared per fiber wavelength
converter pool architecture.
This wavelength converter pool can be encoded as follows:
Bernstein and Lee Expires January 10, 2010 [Page 27]
Internet-Draft Wavelength Switched Optical Networks July 2009
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num In Pairs=1| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: I1,I2 can connect to either WC1 or WC2
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |0 1|0 0 0 0 0 0|Reserved(Note: inclusive list) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 | Reserved(Note: inclusive WC list) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC ID = #1 | WC ID = #2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: WC1 can only connect to E1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 | Reserved(Note: inclusive list) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC ID = #1 | zero padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |1 0|0 0 0 0 0 0|Reserved(Note: inclusive list) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: WC2 can only connect to E2
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 | Reserved(Note: inclusive WC list) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC ID = #2 | zero padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |1 0|0 0 0 0 0 0|Reserved(Note: inclusive list) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Link Local Identifier = #4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
A.4. Wavelength Conversion Range Sub-TLV
Example:
We give an example based on figure 1 about how to represent the
wavelength conversion range of wavelength converters. Suppose the
Bernstein and Lee Expires January 10, 2010 [Page 28]
Internet-Draft Wavelength Switched Optical Networks July 2009
wavelength range of input and output of WC1 and WC2 are {L1, L2, L3,
L4}:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: WC Set
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action=0 |0 1| Reserved(Note: inclusive list) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WC ID = #1 | WC ID = #2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: wavelength input range
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action = 2 | Reserved | Num Wavelengths = 4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n for lowest frequency = 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note: wavelength output range
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Action = 2 | Reserved | Num Wavelengths = 4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. | Reserved | n for lowest frequency = 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bernstein and Lee Expires January 10, 2010 [Page 29]
Internet-Draft Wavelength Switched Optical Networks July 2009
10. References
10.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
MIB", RFC 2863, June 2000.
[RFC3471] Berger, L., "Generalized Multi-Protocol Label Switching
(GMPLS) Signaling Functional Description", RFC 3471,
January 2003.
[G.694.1] ITU-T Recommendation G.694.1, "Spectral grids for WDM
applications: DWDM frequency grid", June, 2002.
[RFC4202] Kompella, K., Ed., and Y. Rekhter, Ed., "Routing Extensions
in Support of Generalized Multi-Protocol Label Switching
(GMPLS)", RFC 4202, October 2005
[RFC4203] Kompella, K., Ed., and Y. Rekhter, Ed., "OSPF Extensions in
Support of Generalized Multi-Protocol Label Switching
(GMPLS)", RFC 4203, October 2005.
10.2. Informative References
[G.694.1] ITU-T Recommendation G.694.1, Spectral grids for WDM
applications: DWDM frequency grid, June 2002.
[G.694.2] ITU-T Recommendation G.694.2, Spectral grids for WDM
applications: CWDM wavelength grid, December 2003.
[Otani] T. Otani, H. Guo, K. Miyazaki, D. Caviglia, "Generalized
Labels for G.694 Lambda-Switching Capable Label Switching
Routers", work in progress: draft-ietf-ccamp-gmpls-g-694-
lambda-labels.
[RFC5307] Kompella, K., Ed., and Y. Rekhter, Ed., "IS-IS Extensions
in Support of Generalized Multi-Protocol Label Switching
(GMPLS)", RFC 5307, October 2008.
Bernstein and Lee Expires January 10, 2010 [Page 30]
Internet-Draft Wavelength Switched Optical Networks July 2009
[Switch] G. Bernstein, Y. Lee, A. Gavler, J. Martensson, " Modeling
WDM Wavelength Switching Systems for Use in GMPLS and Automated
Path Computation", Journal of Optical Communications and
Networking, vol. 1, June, 2009, pp. 187-195.
[WSON-Frame] Y. Lee, G. Bernstein, W. Imajuku, "Framework for GMPLS
and PCE Control of Wavelength Switched Optical Networks",
work in progress: draft-ietf-ccamp-wavelength-switched-
framework, Marh 2009.
[WSON-Info] G. Bernstein, Y. Lee, D. Li, W. Imajuku, "Routing and
Wavelength Assignment Information Model for Wavelength
Switched Optical Networks", work in progress: draft-ietf-
ccamp-rwa-info, March 2009.
[PCEP] Vasseur, JP., Ed. and JL. Le Roux, Ed., "Path Computation
Element (PCE) communication Protocol (PCEP) - Version 1",
RFC5440.
Bernstein and Lee Expires January 10, 2010 [Page 31]
Internet-Draft Wavelength Switched Optical Networks July 2009
11. Contributors
Diego Caviglia
Ericsson
Via A. Negrone 1/A 16153
Genoa Italy
Phone: +39 010 600 3736
Email: diego.caviglia@(marconi.com, ericsson.com)
Anders Gavler
Acreo AB
Electrum 236
SE - 164 40 Kista Sweden
Email: Anders.Gavler@acreo.se
Jonas Martensson
Acreo AB
Electrum 236
SE - 164 40 Kista, Sweden
Email: Jonas.Martensson@acreo.se
Itaru Nishioka
NEC Corp.
1753 Simonumabe, Nakahara-ku, Kawasaki, Kanagawa 211-8666
Japan
Phone: +81 44 396 3287
Email: i-nishioka@cb.jp.nec.com
Authors' Addresses
Greg M. Bernstein (ed.)
Grotto Networking
Fremont California, USA
Phone: (510) 573-2237
Email: gregb@grotto-networking.com
Bernstein and Lee Expires January 10, 2010 [Page 32]
Internet-Draft Wavelength Switched Optical Networks July 2009
Young Lee (ed.)
Huawei Technologies
1700 Alma Drive, Suite 100
Plano, TX 75075
USA
Phone: (972) 509-5599 (x2240)
Email: ylee@huawei.com
Dan Li
Huawei Technologies Co., Ltd.
F3-5-B R&D Center, Huawei Base,
Bantian, Longgang District
Shenzhen 518129 P.R.China
Phone: +86-755-28973237
Email: danli@huawei.com
Wataru Imajuku
NTT Network Innovation Labs
1-1 Hikari-no-oka, Yokosuka, Kanagawa
Japan
Phone: +81-(46) 859-4315
Email: imajuku.wataru@lab.ntt.co.jp
Jianrui Han
Huawei Technologies Co., Ltd.
F3-5-B R&D Center, Huawei Base,
Bantian, Longgang District
Shenzhen 518129 P.R.China
Phone: +86-755-28972916
Email: hanjianrui@huawei.com
Intellectual Property Statement
The IETF Trust takes no position regarding the validity or scope of
any Intellectual Property Rights or other rights that might be
claimed to pertain to the implementation or use of the technology
described in any IETF Document or the extent to which any license
under such rights might or might not be available; nor does it
Bernstein and Lee Expires January 10, 2010 [Page 33]
Internet-Draft Wavelength Switched Optical Networks July 2009
represent that it has made any independent effort to identify any
such rights.
Copies of Intellectual Property disclosures made to the IETF
Secretariat and any assurances of licenses to be made available, or
the result of an attempt made to obtain a general license or
permission for the use of such proprietary rights by implementers or
users of this specification can be obtained from the IETF on-line IPR
repository at http://www.ietf.org/ipr
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
any standard or specification contained in an IETF Document. Please
address the information to the IETF at ietf-ipr@ietf.org.
Disclaimer of Validity
All IETF Documents and the information contained therein are provided
on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE
REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE
IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
WARRANTY THAT THE USE OF THE INFORMATION THEREIN WILL NOT INFRINGE
ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE.
Acknowledgment
Funding for the RFC Editor function is currently provided by the
Internet Society.
Bernstein and Lee Expires January 10, 2010 [Page 34]
| PAFTECH AB 2003-2026 | 2026-04-24 01:55:48 |