1. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 1 NTT Network Service Systems Laboratories / NTT Network Innovation Laboratories NTT’s Research on Application-Network Collaborative Bandwidth On-Demand for Uncompressed HDTV Transmission in IP-optical Networks Kohei Shiomoto, Tomonori Takeda (NTT)

2. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 2 Summary This talk is about sharing NTT’s research activities in the field of Application-Network collaboration. – Application is uncompressed HDTV on-demand transmission. – N etwork is GMPLS-based IP-optical network. We defined and prototyped interfaces for the application to better use network resources.

3. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 3 Uncompressed HDTV transmission in IP networks Videos are usually compressed before transmitting over networks – Compression causes encoding /decoding delays and Loss of information Uncompressed HDTV video transmission offers significant values – Low Delay enables high-presence, bi-directional visual communication – Broadcasting studios can share original materials to edit programs – Future advanced use of high-definition video in telemedicine, e-learning, etc i-Visto : Internet Video Studio System for High-resolution Video Production Transfers, stores and delivers high-quality uncompressed video over IP network i-Visto : Internet Video Studio System for High-resolution Video Production Transfers, stores and delivers high-quality uncompressed video over IP network i-Visto gateway (XG-2) i-Visto gateway (XG-1) IP network i-Visto eXmedia server (XMS)

4. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 4 Challenge: Need for huge bandwidth circuit It requires a dedicated circuit with huge bandwidth (Uncompressed HDTV-Class video = 1.5Gbps)  Cannot be used immediately – It usually takes several weeks or even months to subscribe a circuit  Availability information is important – Users want to know when and how much is the bandwidth is available  Capacity design is hard – A single application (or single flow) occupies a huge bandwidth 3. Configuration 1. Path setup request 4. Notification The set path is occupied even when it is not used. 2. Manual allocation

5. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 5 Solution Network Virtualization Application-network Collaboration Immediate use Problem Solution Network provides an interface to let applications setup optical circuit dynamically Network provides a Interface to make inquiry of the network status (ex. available bandwidth and time, delay) Network availability info. Network capacity design Network optimizes its topology by switching the optical path Network provides not only immediate but also future reservation of the circuit

6. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 6 Key components – High performance network virtualization Network Control - Optical/MPLS path setup - Topology info. collection - Traffic info. collection Resource management - Resource allocation - Resource optimization Open interface (XML/CORBA) Automatic control -Traffic matrix estimation -VNT reconfiguration Manual control (GUI) -Multi-layer NW info. view -Topology design Application (Overlay Network Operation) Platform server (Underlay Network virtualization and control) Topology control -Optical/MPLS path setup request Network status -Allocated resources - Measured traffic Sapporo Tokyo Nagoya Sapporo Nagoya Tokyo Osaka Sapporo Tokyo Osaka VoIP Service IP-optical network Resource Allocation OXC Router Optical Path VPN ServiceExperiment Virtualization and path setup control is conducted by the IP-optical TE server developed based on the PCE/VNTM architecture [RFC 5212, 5623]

7. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 7 Application-network collaboration in IP-optical networks On-demand circuit setup – MPLS-LSP route that can accommodate the required bandwidth is calculated – If no route is found, it calculates to set up a new optical path (L1-LSP) Reconfigure virtual network topology dynamically – IP-optical TE Server re-optimizes the virtual network topology based on measured traffic Circuit setup request Dynamic Topology reconfiguration Path setup (L1/MPLS) Editorial room Live Broadcasting IP-optical network infrastructure IP-optical TE server Video Application

8. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 8 SC09 Booth #2164 Wide area experiment Experimental network using testbeds: JGN2plus(NICT), GEMnet2(NTT) Demo in SC09 (Portland, OR) using international connection Dynamic optimization of the VNT successfully worked without packet drop. On-demand path setup time = 28 seconds IP-Optical TE server 1.5 Gbps Un-compressed video transmission i-Visto GW OSAKA i-Visto GW Traffic generator i-Visto GW TOKYO HDTV Camera in Osaka (Asahi Broadcasting Corp) Video Server in Tokyo i-Visto GW

9. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 9 Concluding Remarks Application-network collaboration interface is designed assuming use of uncompressed video transmission in broadcasting studios – On-demand path setup and future reservation – Inquiry of network availability – Dynamic re-optimization of the virtual network topology Prototype implementation and experiment

10. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 10 Backup Slides

11. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 11 Application-network IF IP-optical TE Server provides four commands to the applications – Setup – Modification – Teardown – Inquiry By adding parameters, applications can use the functions such as 1.-5. – flowKey, applicationType, maxBandwidth, minBandwidth, maxDelay, maxDelayVariation Range, protection, setupTime, setupTimeRange, teardownTime, teardownTimeRange, fileSize, deadline, deadlineRange Setup (flowKey, maxBandwidth, […] ) Configuration Path setup (GMPLS) Response (OK|NG, sessionID) Modification (sessionID, […] ) Configuration Path modify (GMPLS) Response (OK|NG) Teardown (sessionID) Configuration Path teardown (GMPLS) Response () IP-optical TE Server ApplicationRouter Optical Switch 1.Circuit setup (immediate) 2.Circuit setup (future reservation) 3.Modification 4.Bandwidth reservation for file transfer 5.Network availability inquiry

12. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 12 Network function for Video Streaming Application 1.Circuit setup (immediate) MPLS/L1 LSP is set according to the constraints notified bay the parameters maxDelayVariationTime : constraint to avoid route changes that cause large difference of the delay that the video stream cannot tolerate 2.Circuit setup (future reservation) Applications can specify time range ( T s to T s +  T s ) 3.Modification Applications can modify the condition of the existing or the reserved circuit (ex. bandwidth, time …)

13. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 13 Network function for Video Streaming Application 4.Bandwidth reservation for file transfer Broadcasting studios want to transmit video materials before a deadline to start the editorial  Network plans a circuit to transfer the filesize before the deadline. The path/bandwidth may not be consistent through the reserved time. maxBandwidth – User site may have limitation in transmission capacity

14. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 14 Network function for Video Streaming Application 5.Network availability inquiry Users want to know when and how the network is available Users can adapt the video steaming according to the network availability (rescheduling, transcoding, …)  Network answers to the question How much bandwidth is available between A and B? When does the bandwidth become available? How is the packet delay between A and B? What is the price? – Bandwidth in a less available time can be sold at high price

15. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 15 Prototype implementation Implementation of basic commands (Setup and Teardown) XML format setup multilayer 2 1.0.0.201 2 1.0.0.202 1 1.000000E+08 2009/02/02 12:59 Setup( flowKey, applicationType, maxBandwidth, minBandwidth, maxDelay, maxDelayVariation Range, protection, setupTime, setupTimeRange, teardownTime, teardownTimeRange, fileSize, deadline, deadlineRange)

16. Copyright (c) 2010 Nippon Telegraph and Telephone Corp. 16 Dynamic reconfiguration of the Virtual Network Topology (VNT) VNT can be dynamically reconfigured by setting up and/or tearing down the optical paths between any pair of IP routers. The VNT reconfiguration is done in response to the change in the traffic condition Collect link traffic measurement Estimation of Traffic Matrix Optimum topology Calculation Path control Measurement teardown setup Control Application Server (Service Network Operation) Platform server (Optical Network virtualization and control) Optical SW Router