Title :
Upstream OCDMA-TDM passive optical network using a novel sourceless ONU
Author :
Gharaei, Mohammad ; Lepers, Catherine ; Gallion, Philippe
Author_Institution :
SAMOVAR, Telecom SudParis, Evry, France
Abstract :
OCDMA over conventional TDM PON leads to increase access network capacity by multiplexing TDM signals with OCDMA codes. We propose a novel sourceless ONU for OCDMA-TDM PON within a centralized light source placed at OLT. Sparser and longer extended quadratic congruence (EQC) codes with good correlation properties are used as optical CDMA en/decoders. However, multiple access interference (MAI) can limit the number of simultaneous users in this system. We analyze BER performance of sourceless OCDMA-TDM PON using four different EQC codes. Finally, network scalability and throughput performance of the proposed scheme are analyzed. These analyses over OCDMA-TDM PON show an upgrade of bandwidth and network capacity with an advantage of sourceless ONUs compared to the conventional TDM PON.
Keywords :
code division multiple access; code division multiplexing; passive optical networks; time division multiplexing; BER performance; OCDMA codes; access network capacity; centralized light source; extended quadratic congruence codes; multiple access interference; multiplexing TDM signal; network scalability; optical CDMA decoders; optical CDMA encoders; sourceless OCDMA-TDM PON; sourceless ONU; upstream OCDMA-TDM passive optical network; Optical fibers; Optical network units; Optical receivers; Optical reflection; Passive optical networks; Time division multiplexing; Access network; optical code-division multiple access (OCDMA); passive optical network (PON); reflective ONUs;
Conference_Titel :
Networks and Optical Communications (NOC), 2012 17th European Conference on
Conference_Location :
Vilanova i la Geltru
Print_ISBN :
978-1-4673-0949-3
Electronic_ISBN :
978-1-4673-0950-9
DOI :
10.1109/NOC.2012.6249912
