NDLI: Constructions of optical FIFO queues

Content Provider	ACM Digital Library
Author	Chen, Yi-Ting Chang, Cheng-Shang Lee, Duan-Shin
Abstract	Discrete-time queues are infinite dimensional switches in time. Ever since Shannon published his paper ("Memory requirements in telephone exchange," Bell Syst. Tech. J., pp. 343-349, vol. 29, 1950) on the memory requirements in a telephone exchange, there have been tremendous efforts in the search for switches with minimum complexity. Constructing queues with minimum complexity has not received the same amount of attention as queues are relatively cheap to build via electronic memory. Recent advances in optical technologies, however, have spurred interest in building optical queues with minimum complexity. In this correspondnece, we develop mathematical theory of constructing discrete-time optical first-in-first-out (FIFO) queues. To our surprise, we find that many classical constructions for switches have their counterparts for constructing queues. Analogous to the three-stage construction of Clos networks, we develop three-stage construction of optical FIFO queues via switched delay lines (SDLs). Via recursively expanding the three-stage construction, we show that an optical FIFO queue with buffer $2^{n}$ -- 1 can be constructed by using $2\textit{n}$ 2 × 2 switches with the total fiber length 3, $2^{n-1}$ -- 2.
Starting Page	2838
Ending Page	2843
Page Count	6
File Format	PDF
ISSN	10636692
DOI	10.1109/TIT.2006.874538
Volume Number	14
Issue Number	SI
Journal	IEEE/ACM Transactions on Networking (TON)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2006-06-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Clos networks First-in-first-out (FIFO) queues Optical memory Optical switches Switched delay lines (SDLs).
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Networks and Communications Software Computer Science Applications

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