ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS BASED UPON VIRTUAL PASSIVE OPTICAL NETWORK (VPON)

摘要

PPROBLEM TO BE SOLVED: To provide an orthogonal frequency division multiple access based upon virtual passive optical network (VPON). PSOLUTION: Various types of passive optical networks operate simultaneously in a passive optical network system having an optical line terminal, a passive remote node, and a plurality of multiple optical network devices. Downstream data are orthogonal frequency division multiplexed onto a single wavelength optical carrier transmitted on a first downstream optical beam from the optical line terminal to a splitter in the passive remote node. The first downstream optical beam is divided into a plurality of second downstream optical beams to be transmitted to a specific optical network device. Upstream data are orthogonal frequency division multiplexed onto a single wavelength optical carrier transmitted on a second upstream optical beam from each optical network device to a coupler in the passive remote node. The upstream wavelength for each optical network device is different. The wavelength division multiplexed optical beam is transmitted from the passive remote node to a parallel signal detector in the optical line terminal. PCOPYRIGHT: (C)2009,JPO&INPIT