Abstract
All-optical label swapping is a promising approach to ultra-high
packet-rate routing and forwarding directly in the optical layer. In this
paper, we review results of the DARPA Next Generation Internet program in
all-optical label swapping at University of California at Santa Barbara
(UCSB). We describe the overall network approach to encapsulate packets with
optical labels and process forwarding and routing functions independent of
packet bit rate and format. Various approaches to label coding using serial
and subcarrier multiplexing addressing and the associated techniques for label
erasure and rewriting, packet regeneration and packet-rate wavelength
conversion are reviewed. These functions have been implemented using both
fiber and semiconductor-based technologies and the ongoing effort at UCSB to
integrate these functions is reported. We described experimental results for
various components and label swapping functions and demonstration of 40 Gb/s
optical label swapping. The advantages and disadvantages of using the various
coding techniques and implementation technologies are discussed.
© 2000 IEEE
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