DocumentCode :
895451
Title :
Code-based all optical routing using two-level coding
Author :
Meenakshi, M. ; Andonovic, Ivan
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Strathclyde, Glasgow, UK
Volume :
24
Issue :
4
fYear :
2006
fDate :
4/1/2006 12:00:00 AM
Firstpage :
1627
Lastpage :
1637
Abstract :
Code-based all optical routing employing a two-level-coding scheme is proposed. The first level of coding is employed to establish connections between users within a local area network; a second level of coding provides routing/interconnectivity between networks. The limitations due to physical-layer impairments, such as relative intensity noise (RIN) of the optical source, the signal-dependent shot noise, optical beat interference (OBI), and thermal noise at the receiver, which are some of the fundamental issues in the design of practical optical code division multiple access (CDMA) systems, are analyzed for the two-level scheme. The throughput in terms of "packets/time slot" offered by the scheme is also compared with that of the wavelength division multiple access (WDMA) system. The system capacity in WDMA is limited by the number of available wavelengths; optical CDMA, on the other hand, has many codes (user addresses), but the throughput is limited by multiple user interference, OBI, and RIN. System designs that overcome these effects and thereby improve the throughput are suggested.
Keywords :
code division multiple access; encoding; optical fibre LAN; optical receivers; shot noise; telecommunication network routing; thermal noise; user interfaces; all optical routing; code-based routing; interconnectivity; local area network; multiple user interference; optical beat interference; optical code division multiple access; optical source; physical-layer impairments; relative intensity noise; signal-dependent shot noise; thermal noise; two-level coding; wavelength division multiple access; Interference; LAN interconnection; Multiaccess communication; Optical design; Optical fiber LAN; Optical interconnections; Optical noise; Optical receivers; Routing; Throughput; Bit error rate (BER); multiple user interference (MUI); optical beat interference (OBI); relative intensity noise (RIN); two-level optical code division multiple access (OCDMA); wavelength division multiple access (WDMA);
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2006.870962
Filename :
1618751
Link To Document :
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