Dynamic Optical Networking via Overlay Control of Static Lightpaths
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1 Dynamic Optical Networking via Overlay Control of Static Lightpaths George N. Rouskas Department of Computer Science North Carolina State University Joint work with: G. Karmous-Edwards, D. Reeves, L. Battestilli Supported by DARPA under Grant No: HR Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.1
2 Outline Dynamic Optical Networking: Vision vs. Reality Edge Reconfigurable Optical Networks (ERONs) ERON Dimensioning Simulation Results Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.2
3 Dynamic Optical Networking: Vision E2E transparent lightpaths with optical switching Hundreds of λs On-demand optical connections Highly reconfigurable core networks Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.3
4 Dynamic Optical Networking: Reality P2P connections with OEO Few λs Long-lived, leased lightpaths Mostly statically configured core networks Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.4
5 Application Requirements vs. Infrastructure Limitations Application and Research Collaboration Requirements: Lightpaths across multi-domain networks Distributed coordination of network & network-attached resources Connection establishment/termination based on user requirements Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.5
6 Application Requirements vs. Infrastructure Limitations Application and Research Collaboration Requirements: Lightpaths across multi-domain networks Distributed coordination of network & network-attached resources Connection establishment/termination based on user requirements Infrastructure Limitations: Lack of capabilities for rapid/automatic lightpath establishment High administrative burden coordinate multiple providers High cost of (semi-)permanent lightpaths Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.5
7 Static Topologies Collection of independent lightpaths; assembled by NRENs academic/research communities large government/private organizations Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.6
8 Static Topologies Collection of independent lightpaths; assembled by NRENs academic/research communities large government/private organizations Each lightpath: established on an as needed basis dedicated between two end-users high-end devices, instruments,... held in place for long time periods (> months) Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.6
9 Challenges Applications require sporadic access to lightpaths extremely low utilization Dedicated lightpaths only available to small fraction of potential users Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.7
10 Utilization (1) Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.8
11 Utilization (2) Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.9
12 Utilization (3) Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.10
13 Edge Reconfigurable Optical Networks ERON goal: transform a set of static optical connections into a flexible network topology that affords users the ability to reserve on demand, or in advance, lightpaths for any desired duration Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.11
14 Edge Reconfigurable Optical Networks ERON goal: transform a set of static optical connections into a flexible network topology that affords users the ability to reserve on demand, or in advance, lightpaths for any desired duration Overlay network: optical switching capabilities at edge nodes under user (not network provider) control Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.11
15 ERON Components 1. A collection of permanent lightpaths leased, connect organization s sites define static logical topology Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.12
16 ERON Components 1. A collection of permanent lightpaths leased, connect organization s sites define static logical topology 2. Edge hardware under user control MEMS optical switches Ethernet switches Short-reach optical interfaces Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.12
17 ERON Components 1. A collection of permanent lightpaths leased, connect organization s sites define static logical topology 2. Edge hardware under user control MEMS optical switches Ethernet switches Short-reach optical interfaces 3. Control software implements control overlay GMPLS signaling resource broker Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.12
18 ERON Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.13
19 ERON Benefits Dynamic connections over static topology Multihop connections (transparent to network provider) Lightpath sharing among multiple users Increased degree of connectivity Higher utilization Amortization of high resource cost over many users/applications Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.14
20 EnLIGHTened Computing Testbed Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.15
21 Research Question ERON deployment costs: hardware and software expense (one-time, mostly) possibility of blocking Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.16
22 Research Question ERON deployment costs: hardware and software expense (one-time, mostly) possibility of blocking Savings? reduced number of lightpaths blocking probability 10 3 QoS metric Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.16
23 Research Question ERON deployment costs: hardware and software expense (one-time, mostly) possibility of blocking Savings? reduced number of lightpaths blocking probability 10 3 QoS metric Objective: quantify practically achievable benefits no attempt to find optimal solutions Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.16
24 ERON Topology Design 1. Start with static topology link capacities 2. Run simulation link utilizations 3. Consider each link in isolation Erlang-B target link utilization 4. Reduce capacity of link with smallest relative link utilization 5. Repeat from Step 2 while BP< 10 3 Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.17
25 Assumptions: Topology M = 100 users (end-devices) D = 3 domains N = 20 nodes ( MEMS switches) N L = 6 large nodes (including N R = 4 relay nodes) N S = 14 small nodes Domains under different administrative control lightpaths terminate at boundaries end-to-end lightpaths intra-domain lightpaths end-to-end lightpath consists of 1 3 intra-domain lightpaths Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.18
26 Three-Domain Topology Relay Node Relay Node Small Node Domain 1 Domain 2 Domain 3 Large Node Relay Node Relay Node Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.19
27 Three-Domain Topology Relay Node Relay Node Small Node Domain 1 Domain 2 Domain 3 Large Node Relay Node Relay Node Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.19
28 Assumptions: Traffic Lightpath capacity: 10 Gbps Traffic distribution: 40% Large-Large 40% Large-Small 20% Small-Small Traffic Pattern: uniform distance decreasing distance increasing Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.20
29 Simulation Scenarios Low traffic scenario aggregate traffic: 5, 10, 100, 150, 200, 250, 300 Gbps High traffic scenario aggregate traffic: 1.0, 1.5, 2.0, 2.5, 3.0 Tbps Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.21
30 Topology Visualizations: Low Traffic, 100 Connections Static topology: 141 LPs ERON: 114 LPs Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.22
31 Topology Visualizations: Low Traffic, 200 Connections Static topology: 254 LPs ERON: 143 LPs Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.23
32 Topology Visualizations: Low Traffic, 300 Connections Static topology: 376 LPs ERON: 173 LPs Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.24
33 Low Traffic Scenario: Effect of Traffic Amount 40 K=100, BP=0.001 Aggregate Traffic (Tbps) Dist-Dec Uniform Dist-Inc % Decrease in Lightpaths Peak Transmission Hours/Month Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.25
34 Low Traffic Scenario: Effect of # of Connections 200 GBps, BP=0.001 Number K of Static Connections % Decrease in Lightpaths Peak Transmission Hours / Month Dist-Dec Uniform Dist-Inc Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.26
35 High Traffic Scenario: Effect of Traffic Amount K=1000, BP= Aggregate Traffic (Tbps) Dist-Dec Uniform Dist-Inc % Decrease in Lightpaths Peak Transmission Hours / Month Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.27
36 High Traffic Scenario: Effect of # of Connections 2 TBps, BP=0.001 Number K of Static Connections % Decrease in Lightpaths Peak Transmission Hours / Month Dist-Dec Uniform Dist-Inc Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.28
37 Summary ERON overlay control networks: medium-term solution static topologies ERON reconfigurable core Easy to implement and deploy use existing hardware and software technology Substantial benefits: user-controlled dynamic optical networking lightpath savings sharing higher utilization, degree of connectivity low blocking Dynamic Optical Networking via Overlay Control of Static Lightpaths ACP 2009, November 5, 2009 p.29
ERONs: Dynamic Optical Networking via Overlay Control of Static Lightpaths
ERONs: Dynamic Optical Networking via Overlay Control of Static Lightpaths G. Karmous-Edwards, D. Reeves, L. Battestilli, P. Vegesna, A. Viswanath, G. N. Rouskas Department of Computer Science North Carolina
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