1. Grid Optical Burst Switched Networks

2. Today’s optical network infrastructure for Grid services
Data intensive Grid services/applications
Particle physics large international collaborations and data intensive experiments are demanding leading edge networks
Very Long Baseline Interferometry (VLBI) used by radio astronomers to obtain detailed images of cosmic radio sources.
Optical network provides dedicated end-to-end high-bandwidth connection
Well known virtual organisations participates
Static or semi-static point-to-point connections
long-lived wavelength paths between client and Grid resources are usually established.
Centralized job management strategies
Optimized for extremely large jobs

3. Optical switching technology for High Performance-Data Intensive Grid Computing
Wavelength switching
High bandwidth dedicated links, dynamically allocated on-demand or by scheduled reservation
Data intensive applications can ask the optical network for a point-to-point link on a private network or an OVPN
Hybrid IP router/wavelength switching
Extends the wavelength switching architecture by adding a layer of IP routers with OC-48/192/768 interfaces between the Grid nodes and the optical network
The GRID node could connect to these interfaces or to the optical network

4. New Solutions, Architectures and Technologies are Emerging
Evolving Grid applications:
Need infrastructures that makes vast amount of storage and computation resources potentially available to a large number of users.
Need for user controlled network infrastructure :
high resolution home video editing
real-time rendering
high-definition interactive TV
e-health
immersive interactive learning environments
A wavelength-switched based optical network for transport between job origin and remote resource location will be very inefficient
A request/grant based architecture may not be suitable

5. Optical Burst Switching (OBS)
Separation of the control and data planes
Brings together the complimentary strengths of optics and electronics
Allows for fine-grain multiplexing of data over a single lambda
Optical burst switching (OBS) supports multi-service traffic, offering sub-wavelength granularity and high spectral efficiency

6. OBS Network Scenario Computational & storage resources Small User
Scientific User
Computational & storage
resources
Small User
Burst Header
Traditional OBS User
Traditional OBS User
Burst payload
Computational & storage
resources
Computational & storage
OBS Router
resources
Traditional OBS User

7. Optical Burst Switching (OBS) a Promising Technology for Grids
OBS Offers transport for highly demanding Grid applications
All-optical data transmission with user/application-initiated light path setup
OBS can deal with a wide variety of applications and accommodate, medium and large size jobs, short lived & long lived Grid relationships
Decentralized management (P2P-like)
Native mapping between bursts and Grid jobs
Single protocol layer
Clear job delivery semantics
Efficient : “optimal” routing decision per job
Separation of control and data plane
Electronic processing of the burst control packet at each node
Optical Burst
Grid Applications
Requirements

8. Specific Use Cases: Remote Medical image processing
Remote medical image processing in UK:
Optical link between the Visualisation Centre for Medical Applications in Cardiff and virtual reality cave (IBM super computer) in Swansea
Optical link is part of traffic Wales network infrastructure
The virtual reality facility will enable medical science researchers to examine high-definition medical images in 3D format remotely
Images are high-definition :
Need high bandwidth, dedicated processing power
They can not efficiently use wavelength switching (waste of bandwidth)
They can be accommodated in bursts
Offering sub-wavelength BW granularity for requested time duration will be optimum

9. Grid Optical Burst Switched Networks Draft Current Situation
Use cases and specific implementations:
OBS for consumer Grid applications
Control plane and signalling issues for Grid-OBS
Connection setup mechanism
QoS provisioning for Grid services
Constrained-based routing
Grid-OBS network elements
Core router
Edge router
Advanced network concepts
Self-organised OBS network
Programmable OBS network

10. Grid Optical Burst Switched Networks Draft Future Works
Use case scenarios developed in Japan
Use case scenario for medical application (developing in UK)
Reliable transport control technology for Grid-OBS
Ultra fast optical path setup protocol for Grid-OBS and its optical implementations
Security issues in Grid-OBS networks