77th IETF – Anaheim, California, March 2010Page - 1

Routing and Wavelength Assignment Information Encoding for Wavelength Switched

Optical Networks

Greg Bernstein gregb@grotto-networking.comGrotto Networking

Young Lee ylee@huawei.comHuawei

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