Research and Experimental Assessment of Control plane architectures for In-Operation flexgrid Network re-optimization (REACTION)

Transcription

1 Research and Experimental Assessment of Control plane architectures for In-Operation flexgrid Network re-optimization (REACTION) Filippo Cugini, Luis Velasco, Juan Pedro Fernandez-Palacios Copenaghen, November, 2014

2 Outline Project overview Implemented project tools and facilities OPNET model Distributed testbed Some project achievements on advanced use cases Slice-ability After failure repair optimization Multipath restoration and bitrate squeezing 2

3 Participants Participant no. Participant organisation name Participant short name Country 1 (Coordinator) Consorzio Nazionale Interuniversitario per le Telecomunicazioni CNIT Italy 2 Universitat Politècnica de Catalunya, Barcelonatech UPC Spain 3 Telefonica TID Spain 3

4 Abstract REACTION targets the design and validation of a flexible optical network enabling software-controlled superchannel transmission. The focus is on: 1. Advanced bandwidth variable transponder (BVT) functionalities supporting multi-carrier transmission, adaptation of transmission parameters (mod. format, spectrum allocation, coding/fec) and slice-ability 2. Advanced control plane architecture and functionalities including innovative two-level active stateful PCE including the BGP-LS advertising solution 3. Advanced routing and spectrum assignment (RSA) algorithms Activity lead by CNIT Activity lead by TID Activity lead by UPC 4

5 Tool: OPNET Model C programming language OPNET: Event driven network framework 5

6 OPNET Implementation (1/3): OSPF-TE Functionalities: Link state advertisement Spectrum availability adv. Extensions for flex-grid Routing and Spectrum Assignment 6

7 OPNET Implementation (2/3): RSVP-TE Functionalities: Reserve/Release spectrum slots along the path Extensions for flex-grid 7

8 OPNET Implementation (3/3): PCE and PCEP Finite state machine (FSM) of the root process FSM of the child process: specific for each PCE-PCC session. 8

9 Distributed control plane implementation Extended for flexi-grid 9

10 Implemented control plane architecture Front-end PCE Back-end PCE Provisioning PCEP Server PCEP BGP-LS PCEP Server Active Solver Inventory TED LSP-DB TED LSP-DB Active stateful front-end PCE, in charge of computing RSA and elastic provisioning Back-end PCE responsible for performing complex network operation s (e.g., re-optimizations) To provide the back-end PCE with updated network topology info, we propose to rely on the North-Bound Distribution of Link-State and TE Information through BGP, known as BGP-LS. 10

11 Testbed resources CNIT: PCE TED P 3 (QPSK) - IP/MPLS network testbed composed of six IP/MPLS routers (Juniper M7i/M10, Cisco 7206); OXC3 p 2 OXC4 - traffic generator/analyzer, Tb/s Tx/Rx OXC1 OXC5 p 1 (16QAM) OXC2 Tb/s Tx/Rx - 3 ROADMs and 3 flexi-grid WSS; - Optical terabit/s TX with coherent RX - Advanced control plane including GMPLS and PCE as well as SDN controller and agents. UPC: Back-end PCE The test-bed supports the most advanced RSA algorithms and interoperates with the PCEs of the other partners. Telefonica I+D: - Flexgrid testbed with Flexgrid ROADMS from Cisco - control plane emulator supporting multiple domains and including GMPLS and PCE extensions for Flexgrid. 11

12 Slice-ability (1/2) Year 1 Four different destinations Year 2 Two different destinations Year 3 Single destination 37,5GHz 100G 100G 100G 100G 200G 200G 400G Sliceable functionality applied to a single fourcarrier SBVT 150 GHZ 125 GHZ 100 GHZ Flexibility to cope with traffic increase support connections to different destinations, each served by a sub-set of sub-carriers. 12

13 Slice-ability (2/2) Year 1 Four different destinations Year 2 Two different destinations Year 3 Single destination 37,5GHz 100G 100G 100G 100G 200G 200G 400G 150 GHZ 125 GHZ 100 GHZ Flexibility in provisioning and recovery Single path with low spectrum use vs. multi-path with overall larger spectrum? s d 13

14 Performance evaluation: Provisioning Sliced No Sliced Adaptive 14

15 Performance evaluation: Recovery Sliced No Sliced Adaptive [Ref] M. Dallaglio, A. Giorgetti, N. Sambo, F. Cugini, P. Castoldi, Impact of slice-ability on dynamic restoration in GMPLS-based Flexible Optical Networks Optical Fiber Communications Conference (OFC), March

16 Slice-ability on different SBVT architectures Sliceable BVT architecture can be implemented either with 1. Array of N tunable lasers 2. A single tunable multi-wavelength source (generated from 1 laser) N lasers guarantee full and independent tunability of each sub-carrier no constraint s on RSA Conversely, a MW source only supports contiguous frequencies RSA constraints A MW source is expected to be to be cheaper (reducing the number of lasers), with lower footprint and lower power consumption. Moreover a MW source enables better frequency stability among sub-carriers less spectrum. 16

17 Performance evaluation: Recovery with MW [Ref] M. Dallaglio, A. Giorgetti, N. Sambo, P. Castoldi, Impact of SBVTs based on Multi-wavelength Source During Provisioning and Restoration in Elastic Optical Networks, ECOC Conf, Sept

18 After failure repair optimization P P2 4 slices 8 slices Restoration P P2b 4 slices 8 9 P2a 2 slices 4 slices 1 0 Re-optimization P slices P2 8 slices Optical Link a) Frequency slice P1 P5 P5 P4 P2 P2 P3 b) Frequency slice P1 P5 P5 P2b P2b P2b P2a P4 P3 c) Frequency slice P1 P5 P5 P4 P2 P2 P3 18

19 Effective re-optimization algorithms 19

20 Implementation (1/2) Telefonica CNIT UPC ABNO-driven re-optimization Involves both front-end PCE and Back-end PCE [Ref] L. Velasco, F. Paolucci, Ll. Gifre, A. Aguado, F. Cugini, P. Castoldi, V. Lopez,, First experimental demonstration of ABNO-driven in-operation flexgrid network re-optimization, OFC Conf, March. 2014, post-deadline paper 20

21 Implementation (2/2) Telefónica Premises (Madrid, Spain) UPC Premises (Barcelona, Spain) ABNO Controller Back-end PCE PCEP PCEP PCEP Server Active Solver TED LSP-DB CNIT Premises (Pisa, Italy) Active Stateful PCE Provisioning PCEP Server GCO PCC Conn. Controller Res. Mngr. TED LSP-DB n = 1 m = Controller RSVP-TE Controller PCEP Controller [Ref]. L. Gifre, F. Paolucci, L. Velasco, A. Aguado, F. Cugini, P. Castoldi, V. Lopez, First Experimental Assessment of ABNO-driven In-Operation Flexgrid Network Re-Optimization Journal of Lightwave Technology (JLT),

22 Multipath Restoration and Bitrate Squeezing 22

23 SDN-based Implementation [Ref]. F. Paolucci, A. Castro, F. Cugini, L. Velasco, P. Castoldi Multipath restoration and bitrate squeezing in SDN-based elastic optical networks [Invited] Journal of Photonic Network Communications (PNET), Aug

24 Multi-domain networks Broker Multi-domain planning tool SDN Controller SDN Controller ABNO SDN Controller Inter-domain Links In-operation Planning Tool Abstract Links In-operation Planning Tool DataCenter 1 Optical Transport Network Optical Transport Network DataCenter 2 24

25 Example Candidate Path src Domain 2 (ABNO) 1, 3, 6 Domain 1 1, 5, 6 1, 2,6 free slices: 1, 3, 4, 6 3, 6 1, 6 tgt 1, 5, 6 Domain 4 25

26 Experimental Set-up OF-Controller D2 USTC Premises (Hefei, China) OpenFlow OpenFlow Broker HTTP/XML PLATON UPC Premises (Barcelona, Spain) OpenFlow Controller D1 HTTP REST Server UC Davis Premises (Davis, California) Controller OpenFlow Topology DB Algorithm [Ref] Ll. Gifre et al, "Experimental Assessment of Broker and Planning Tool Coordination in Multi-domain Environments, submitted to OFC,

27 REACTION Publications [1]. L. Velasco, F. Paolucci, Ll. Gifre, A. Aguado, F. Cugini, P. Castoldi, V. Lopez, First experimental demonstration of ABNO-driven in-operation flexgrid network re-optimization OFC Conf., March 2014, Post-deadline Paper [2]. M. Dallaglio, A. Giorgetti, N. Sambo, F. Cugini, P. Castoldi, Impact of slice-ability on dynamic restoration in GMPLS-based Flexible Optical Networks OFC Conf., March 2014, Top Scored Paper [3]. Ll. Gifre, A. Castro, M. Ruiz, N. Navarro, L. Velasco, An in-operation planning tool architecture for flexgrid network re-optimization ICTON Conf., July 2014 [4]. M. Dallaglio, A. Giorgetti, N. Sambo, P. Castoldi, Impact of SBVTs based on Multi-wavelength Source During Provisioning and Restoration in Elastic Optical Networks ECOC Conf., Sept [5]. F. Paolucci, A. Castro, F. Cugini, L. Velasco, P. Castoldi Multipath restoration and bitrate squeezing in SDN-based elastic optical networks [Invited] Journal of Photonic Network Communications (PNET), August 2014 [6]. L. Gifre, F. Paolucci, L. Velasco, A. Aguado, F. Cugini, P. Castoldi, V. Lopez, First Experimental Assessment of ABNO-driven In-Operation Flexgrid Network Re-Optimization Journal of Lightwave Technology (JLT), One additional JOCN journal under minor revisions, two papers submitted at OFC

28 Contacts Filippo Cugini Luis Velasco Juan Pedro Fernandez-Palacios Gimenez Victor Lopez 28