routing and wavelength assignment information encoding for wavelength switched optical networks
DESCRIPTION
Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks. draft-ietf-ccamp-rwa-wson-encode-04.txt. Greg Bernstein [email protected] Grotto Networking Young Lee [email protected] Huawei. Authors/Contributors. - PowerPoint PPT PresentationTRANSCRIPT
77th IETF – Anaheim, California, March 2010Page - 1
Routing and Wavelength Assignment Information Encoding for Wavelength Switched
Optical Networks
Greg Bernstein [email protected] Networking
Young Lee [email protected]
draft-ietf-ccamp-rwa-wson-encode-04.txt
77th IETF – Anaheim, California, March 2010Page - 2
Authors/Contributors
• Greg Bernstein (Grotto Networking)• Diego Caviglia (Ericsson)• Ander Gavler (Acreo AB)• Jianrui (Rebecca) Han (Huawei)• Young Lee (Huawei)• Dan Li (Huawei)• Wataru Imajuku (NTT)• Jonas Martensson (Acreo AB)• Itaru Nishioka (NEC Corp.)
77th IETF – Anaheim, California, March 2010Page - 3
Encoding RWA Info in WSON
• Scope is the WSON specific aspects of the RWA WSON Framework and Info Model drafts. (scope reduction)
• This document provides efficient, protocol-agnostic encodings for the WSON specific information elements. It is intended that protocol-specific documents will reference this memo to describe how information is carried for specific uses.
77th IETF – Anaheim, California, March 2010Page - 4
Changes from Encoding 03.txt
• Removed encodings for general concepts to [Gen-Encode].• Generalized & Simplified Resource Pool
– Use “Resource block” terminology to refer to either wavelength converters, regenerators, or other processing
– “Resource blocks” can contain multiple identical resources better for encoding OEO switches, regular regenerators.
• Added in WSON signal compatibility and processing capability information encodings from ietf-ccamp-signal-compatibility-ospf-00.– Resource block info sub-TLV– Related sub-sub-TLVs: Input Modulation, Input FEC, Input Bit
Rate, Input client signal types, Processing Capabilities, Output modulation types, Output FEC types.
77th IETF – Anaheim, California, March 2010Page - 5
Resource Pool Information Model
• <Node_Info> ::= <Node_ID>[Other GMPLS sub-TLVs] [<ResourcePool>][<RBPoolState>]
where <ResourcePool> ::= <ResourceBlockInfo>... [<ResourceBlockAccessibility>...] [<ResourceWaveConstraints>...]
77th IETF – Anaheim, California, March 2010Page - 6
Resource Pool Encoding
PoolDem
uxD
emux
Optical Switch
WC #1
WC #2
Optical Switch
I1E1
I2 E2
C
C
Combiners
PoolDem
uxD
emux
Optical Switch
WC #1WC #2
I1
E1
I2 E2WC #3
WC #4 C
C
Combiners
(a) Shared by node
Dem
uxD
emux
Mux
Optical Switch M
uxI1E1
I2 E2Optical Switch
Optical Switch
PoolWC #1
WC #2
WC #3
WC #4
DM
I1
I3
DM
DM
DM
OS λ1
OS λ2
OS λ3
OS λ4
OS λ5
PoolWC #1
WC #2
WC #3
I2
I4
(λ1, λ2, λ4, λ5 )
(λ1, λ3, λ4)
(λ2, λ3, λ5)
Optical Combiners
p=2
M=3
Pool
WC #1
WC #2
WC #3
M=3
DM
I1
I3
DM
DM
I2
OS λ1
OS λ2
OS λ3
OS λ4
OS λ5
I4
q=2
(b) Shared by port
(c) “Half Clear”
(d) “Shared by Wavelength”, W=5, M=3, p=2
I1
I2
E1
E2
Ij
IM
Ek
EN
...
......
...
wijp = 1
R #1
R #K
R #2
...
wepk = 1
Ingress Matrix Egress MatrixAggregate Resource Pools
Λi1
ΛiQ1
ΛiQ1 +1
ΛiP
Λo1
Λo2
Λop
...
......
ΛoP
......
ΛiQ2
Gen
eral
Mod
el
77th IETF – Anaheim, California, March 2010Page - 7
Resource Pool Encoding (cont)
λ1 λ2 λ3
I1
I2 - I6E1 – E5
E6
Optical Switch
λ4 λ5 λ6 λ7 λ8
PoolWC #1
WC #2
WC #3
Optical Switch
λ1 λ2 λ3 λ4 λ5 λ6 λ7 λ8
ROADM (colored)
λ1 λ2 λ3
I1
I2 - I6E1 – E5
E6
λ4 λ5 λ6 λ7 λ8 λ1 λ2 λ3 λ4 λ5 λ6 λ7 λ8
ROADM (colored)
Electronic Switch
~Tx
~Tx
~TxRx
Rx
Rx
I1
I2 - I6E1 – E5
E6
PoolWC #1
WC #2
WC #3
ROADM (colorless)
C
Dem
uxD
emux Ele
ctro
nic
Sw
itch
I1E1
I2 E2
Com
bine
rs
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
~Tx
~Tx
~Tx
~Tx
~Tx
~Tx
~Tx
~Tx
C
Dem
uxD
emux
I1E1
I2 E2
Com
bine
rs
Rx
Rx
Rx
Rx
Rx
Rx
Rx
Rx
~Tx
~Tx
~Tx
~Tx
~Tx
~Tx
~Tx
~Tx
C
Regenerators
C
(e) Shared with Local
(f) Shared with Local
(g) Shared with Local
(h) OEO switch with DWDM optics
(i) Regenerators on a DWDM line
77th IETF – Anaheim, California, March 2010Page - 8
Compatibility Encoding
• Applied to the “Resource Block sub-TLV”
• Resource block info sub-TLV– Addresses the compatibility
and capabilities of the resources in a block.
– sub-sub-TLVs: Extracted from OSPF WSON compatibility draft.
Resource Block Set Field
Input Modulation
Input FEC
Input Bit Rate
Input client signal types
Processing Capabilities
Output modulation types
Output FEC types.
77th IETF – Anaheim, California, March 2010Page - 9
Next Steps
– Polish, refine, prepare for last call