Optical network unit and center of an optical communication network
US6011637A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 1997 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | May 13, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Optical communication networks (NET) transmit bidirectionally information between a center (OLT) and a plurality of optical network units (ONU) which are connected with each other by optical fiber links. The communication network (NET) of the invention operates with composite signals consisting of reference pulses and data packets which are transmitted in the time intervals between the reference pulses. The composite signals are transmitted to all optical network units (ONU). Each optical network unit (ONU) transmits its respective data stream to the center (OLT) using the asynchronous CDMA technique by modulating the received reference pulses with the respective data stream in an electro/optical unit (S1) and encoding the modulated reference pulses in a CDMA encoder (C1) using the CDMA technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.