Patent ID: 6804256
Filing Date: 2004-10-12
Classification: H04B,H04J,H04Q

Abstract:
An automatic bandwidth adjustment method in a passive optical network (PON) comprising an optical line terminal (OLT) connected to a plurality of optical network units (ONUs), the method comprising the steps of:transmitting data between at least one of the ONUs and the OLT; detecting if there is any undelivered data in the data being transmitted; queuing the undelivered data in an undelivered data block (UDB) in an upstream frame of the ONUs; informing the OLT of the undelivered data using the undelivered data block (UDB); reading the UDB; adjusting bandwidth of the ONU according to the UDB; informing the ONU whether the PON is unavailable using an unused bandwidth block (UBW); and rejecting a new transmission request between the ONU and the OLT if the PON is unavailable.