1. Axel Jantsch 1 Networks on Chip A Paradigm Change ? Axel Jantsch Laboratory of Electronics and Computer Systems, Royal Institute of Technology, Stockholm

2. Axel Jantsch 2 SoCWare Day November 13, 2002 Challange: How do we organize a chip with one or several billion of transistors?

3. Axel Jantsch 3 SoCWare Day November 13, 2002 Why can’t we just continue? Trends and Challenges  Deep submicron effects  Communication versus Computation  Global synchrony  Design productivity gap  Heterogeneity of functions

4. Axel Jantsch 4 SoCWare Day November 13, 2002 Arbitrary Composability  Given: Set of components C and combinators O  A1, A2 : assamblages of components  B is a component  ( C,O ) is arbitrarily compasable if A1 + B => A2 can be done with effort independent of size ( A1 ) A1 + => A2 B

5. Axel Jantsch 5 SoCWare Day November 13, 2002 Network on Chip

6. Axel Jantsch 6 SoCWare Day November 13, 2002 What is a NoC based Platform? A Platform is defined by  (A) the communication infra-structure from the physical level to the application level;  (B) the provided services (e.g. load balancing, power management, fault-tolerance, resource allocation, task scheduling, external I/O, etc.);  (C) the design methodology mapping and implementing applications to the platform.

7. Axel Jantsch 7 SoCWare Day November 13, 2002 How does a NoC Platform help?  Reuse  Predictability

8. Axel Jantsch 8 SoCWare Day November 13, 2002 Reuse  Components and resources  Communication infra-structure  Reuse of the physical design  Lower level communication services  Higher level communication services  Network services (operating system and middleware)  Application parts and features  Design, simulation and prototype environment  Verification effort

9. Axel Jantsch 9 SoCWare Day November 13, 2002 Predictability  Communication performance  Electrical properties  Design and verification time

10. Axel Jantsch 10 SoCWare Day November 13, 2002 The price we pay Less optimal products

11. Axel Jantsch 11 SoCWare Day November 13, 2002 Development of NOC based systems BACKBONE PLATFORMS SYSTEMS Baseband platform Database platform Multimedia platform High-perforrmance communication systems High-capacity communication systems Virtual reality games Entertainment devices Personal assistant Data collection systems

12. Axel Jantsch 12 SoCWare Day November 13, 2002 A NoC Platform Based Design Process  Configuring the platform  Selecting resources  Reuse of features  Evaluation and integration

13. Axel Jantsch 13 SoCWare Day November 13, 2002 Conclusion  Arbitrary composability at physical, architectural, and application level is necessary  If NoC can deliver that it will significantly change design and architecture of SoCs

14. Axel Jantsch 14 SoCWare Day November 13, 2002 Status of Research at KTH  Definition of the protocol stack up to the transport layer  Design of a buffer-less switch and a hot-potato routing technique  NoC simulator  Fault model and error handling scheme  Development of a quasy-sycnhronous clocking scheme  Development of a NoC Assamble Language