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The Computer Journal Advance Access published online on January 6, 2006
The Computer Journal, doi:10.1093/comjnl/bxh167
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© The Author 2006. Published by Oxford University Press on behalf of The British Computer Society. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Received March 15, 2005
Revised September 1, 2005

Article

A Hybrid Network Processor with Support for High-Speed Execution of CPN and Upper Layer IP Protocols

Taskin Kocak 1 *

1 Department of Electrical and Computer Engineering, University of Central Florida, Orlando, FL 32816, USA

* To whom correspondence should be addressed.
Taskin Kocak, E-mail: tkocak{at}cs.ucf.edu


  Abstract

The trend in network processing is towards layer 4-7 processing in the routers and switches. In this paper, we present a hybrid network processor (NPU) architecture that supports high-speed execution of higher layer TCP/IP protocol processing. The architecture achieves this by employing optimized logic blocks for specific tasks in the processing elements. This is a unique architecture such that it can realize both task-level and packet-level parallelism. We also present an example of implementation of a fast adaptive routing algorithm, Cognitive Packet Networks (CPNs), using the proposed NPU architecture. CPN uses a neural network model with a reinforcement learning algorithm to find routes. The applicability of the CPN concept has been demonstrated through several software implementations. Through hardware implementation, we show that this new network model can sustain similar line rates as the current IP protocols.

Keywords: Network routers; hardware design; cognitive packet networks.
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