RAION2 - CTTC

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29 Οκτ 2013 (πριν από 3 χρόνια και 7 μήνες)

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RAION2

Inter
-
domain all
-
optical transport
networks, phase 2

Ramon Casellas, Ricardo Martínez, Raül Muñoz

Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)


Weekly Seminar


November 2009

2

RAION2 project overview


Project funded by an Industrial Research Grant
-

KDDI R&D Labs (JP)


December 2008
-

March 2009.



Main Scope and Objectives


Extend the results obtained in RAION Phase 1
on the topic of OSNR
-
aware
algorithms for GMPLS controlled optical networks.


RAION: Inter
-
domain all
-
optical transport network
-

Translucent GMPLS RWA algorithm,
Weekly Seminar
-

12 November 2008 Speaker: Ricardo
Martínez
, Ph.D.



Evaluation of Path Computation Element (PCE) architectures
and their applicability
in optical transport core networks, focusing in the algorithm of RAION1



Experimental Field
-
Trial of Multi
-
domain
Impairment
-
aware PCE
-
based Path
Computation and protocol extensions for dynamic GMPLS
-
enabled translucent
Wavelength Switched Optical Networks (WSON).


3

Outline


Background


Path Computation in GMPLS controlled optical networks


Introduction and overview


Path Computation Elements, drivers and definition


Design and conception of a Path Computation Element (PCE)


Deployment of a PCE for a Wavelength Switched Optical Network (WSON)


Traffic Engineering Database synchronization


PCE based multi
-
domain path computation using BRPC, and specifics for WSON
such as the wavelength continuity constraint (WCC)




RAION2


specific developments


Performance evaluation of RAION1 algorithm in a PCE
-
based environment.


PCE based multi
-
domain path computation using a "per segment" approach.


Multi
-
domain field trial


4

Two main specific developments


Performance evaluation of OSNR
-
aware algorithm


ADRENALINE Testbed® with PCE based path computation


Simulator
-
based


The PCE is a Path computation engine, can be used in closed
-
loop where the
topology is fed at each request


10000 connections ~ 8h testbed / ~ 2 minutes with simulator


Neglects errors due to signaling and outdated information



PCE
-
based multi
-
domain path computation field trial


Both BRPC and Per
-
segment (to be detailed) possible, focused on the
latter.


IPSec tunnel for test
-
bed interconnection


5

Type
: TE Link Channel
Status

Length
: variable

Number of Wavelength Channels

State#0: Unequipped

Channel Bitmap

0

15

16

31



State#6: In
-
service Protecting

Channel Bitmap

Type
: TE Link SPP Channel
SRLG List

Length
: variable

Shareable Restoration Bandwidth (Bytes/sec)

Number of Wavelength Channels

SRLG Id

0

15

16

31

Channel Bitmap



Extensions to disseminate OSPF
-
TE per link:


a) wavelength status (bitmap) and

b) per wavelength protected SRLGs

6

Type: 53 OSNR Link Info

Length

0

15

16

31

OSNR Local in [dB] at the Booster of the link

OSNR Remote in [dB] at the Pre
-
Amplifier of the link

(b) fulfill the optical signal quality requirements.

OSNR local

OSNR remote

7

Type: 5 Node Top TlV

Length

0

15

16

31

Type: 1 Node ID subtlv

Length

IPv4 Address of the Network Element

0

15

16

31

Type: 2 OSNR Info

Length

Local Link Id

0

15

16

31

OSNR in [dB] at the Booster of the link for TX

OSNR in [dB] at the Pre
-
Amplifier of the link for RX



Type: 2 OSNR Info

Length

0

15

16

31

Regen Level

#Avail. regen

Reserved

7

8

Llinkid 1

Llinkid 2

OSNRboost

OSNRpreamp

disseminate node 3R availability

8





























240km;
25.14dB

160km;
26.89dB

240km;
25.14dB

80km;
29.87dB

40km;
41.17dB

40km;
41.17dB

80km;
29.87dB

160km;
26.89dB

240km;
25.14dB

80km;
29.87dB

240km;
25.14dB

160km;
26.89dB

40km;
41.17dB

40km;
41.17dB

40km;
41.17dB

240km;
25.14dB

240km;
25.14dB

240km;
25.14dB

160km;
26.89dB

320km;
23.9dB

320km;
23.9dB

240km;
25.14dB



Node OSNR
: 31.9dB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Net I: 14
-
node Japan topology

9

OSNR
-
aware Algorithm Performance

10

PCE

Path Computation

Request
(A
-
D)

Path Computation

Reply

CTTC

PCC

KeepAlive

KeepAlive

Open

Open

KeepAlive

KeepAlive

Close

Segment Path

Computation Request (
C
-
D
)

Segment Path

Computation Reply

PCE

KDDI R&D

A: Source Node

D: Destination Node

B: Upstream domain egress

C: Downstream domain ingress


A

B

C

D

Field trial (I) Per segment Path
computation

11









Path
Computation
Element (PCE)

Distributed
Control Plane
(Signalling,
Routing)

Transparent /
Translucent
Optical
Networks

OCC

PCE

ROADM

CTTC DOMAIN

DOWNSTREAM
DOMAIN

PCEP

PCEP

(The Internet, IPsec tunnel VPN)

Emulated

inter
-
domain link





CCI

CTTC KDDI R&D field trial

12

Path Computation Latency

a) Field Trial Path Computation

b) LAN Lab Trial Path Computation

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

330

340

350

360

ms

0.45

40

ms

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

45

50

320

35

Multi Domain Path Computation Latency

Multi Domain Path Computation Latency

Relative Occurrence

Relative Occurrence

13

Publications


On the topic of Path Computation Element


R. Casellas, R. Martínez, R. Muñoz, S. Gunreben,
Enhanced Backwards Recursive Path Computation for Multi
-
area Wavelength
Switched Optical Networks Under Wavelength Continuity Constraint
, Journal of Optical Communications and Networking (JOCN) Vol.
1, No. 2 pp. A180
-
A193, ISSN: 1943
-
062, July 2009



A. Prem
-
Bianzino, J.
-
L. Rougier, S. Secci, R. Casellas, R. Martínez, R. Muñoz, N. Bachir
-
Djarallah, R. Douville, H. Pouyllau,
Implementation
and validation of control
-
plane extensions for inter
-
domain GMPLS
-
TE provisioning
, in Proceedings of 5th International Conference on
testbed and Research Infrastructures for the Development of Networks and Communities (Tridentcom 2009), 6
-
8 April 2009,
Washington D.C. (USA).



R. Casellas, R. Muñoz, R. Martínez,
A Path Computation Element for Shared Path Protection in GMPLS
-
enabled Wavelength Switched
Optical Networks
, in Proceedings of 34th European Conference on Optical Communications (ECOC 2008), 21
-
25 September 2008,
Brussels (Belgium).



R. Casellas, R. Martínez, R. Muñoz,
Design, Implementation and Validation within ADRENALINE® Testbed of a Path Computation
Element for Wavelength Switched Optical Networks
, in Proceedings of 4th International Symposium on IP over Optical (iPOP 2008), 5
-
6
June 2008, Tokyo (Japan).



RAION2 specific field
-
trial


R. Casellas, T. Tsuritani, S. Okamoto, R. Martínez, R. Muñoz,
Experimental Field
-
Trial of Multi
-
domain PCE
-
based Path Computation for
OSNR
-
aware GMPLS enabled translucent WSON
, In Proceedings of 35th European Conference and Exhibition on Optical Communication
(ECOC), 19
-
24 September 2009, Vienna (Austria).


Thanks for your kind
attention!

Questions?