1. Photonic Networks K.J.Blow 2005-2006

2. Module Details 18 lectures and tutorials + Introduction to Optical Transmission lab – Syllabus, slides/notes: http://www.aston.ac.uk/~blowkj/photonicnetworks/index.htm – Course Book Optical Networks, Ramaswami & Sivarajan Morgan Kaufman Publishers, Inc. ISBN 1-55860-445-6 – Assessment Report 70% Technology presentation 30%

3. Other Books Thomas E. Stern, Krishna Bala, Multiwavelength Optical Networks: A Layered Approach, Addison Wesley,1999. Biswanath Mukherjee, Optical Communication Networks, McGraw- Hill, 1997. Andrea Borella, Giovanni Cancellieri, Franco Chiaraluce, Wavelength Division Multiple Access Optical Networks, Artech House, 1998. (X) Walter J. Goralski, Optical Networking & WDM, McGraw-Hill, 2001. (X) Krishna M. Sivalingam and Suresh Subramaniam (Editors), Optical WDM Networks - Principles and Practice, Kluwer, 2000. X=not in library yet

4. Logical vs Physical e.g. These lectures – 7 logical lectures – 24 physical 1 hour slots – may not be a simple mapping addressing – logical network addresses e.g. IP addresses – physical network addresses e.g. wavelength

5. Networking vs Transmission Transmission – Sending data from A to B over a single link – usually connection-oriented – can be data independent Networking – Involves switching – often involves specific types of data HeaderPayload Packet: Trailer

6. Bandwidth Management Circuit Switching – Switching on slow time scales – not traffic dependent – may include protection – intermediate between ‘point to point’ transmission and full packet networking

7. Internet Growth Number of connected computers Time

8. Internet Growth Logarithmic plot Number of connected computers Time

9. Single Link A B Bandwidth Error rate/ Signal to noise ratio Data Rate Failure probability

10. Network Shared AccessSwitched

11. Topology

12. Fully Interconnected Network Network size of N nodes So we have: L = N(N-1)/2 point to point links Scales very badly with N Incremental network cost is L(N+1)-L(N) = (N+1)(N)/2- N(N-1)/2 = N So the cost of adding a new node increases as the network grows, there is no economy of scale.

13. Optical Network Problems Node/ switch/ router failures Accumulation of noise Cross talk Amplifier performance Multiplexing de-multiplexing Network measurements Bandwidth provision Access networks Path dependent effects

14. OSI Reference Model Host A Router Host B Physical Data Link Network Communication Subnet Transport Session Presentation Application

15. Internet Resources http://www.whatis.com/ – lots of general introductory material on communications http://www.iec.org/ – contains tutorials submitted by companies, remember this might give you a biased view http://www.opcook.sc.edu/http://www. – link to ~90 page document covering many many aspects of optical networking, from ‘what is a fibre?’ to ‘how much does it cost?’

16. Next Lecture Basic techniques and concepts Multiplexing Demultiplexing Routing Contention