Patent ID: 8861961
Filing Date: 2014-10-14
Classification: H04J,H04Q

Abstract:
1. A method for helping Optical Network Units (ONUs) access a Passive Optical Network (PON), comprising: sending, by an Optical Line Termination (OLT) of the PON, a same Optical Network Unit (ONU) information request message to the ONUs to thereby broadcast the ONU information request message to the ONUs, wherein the ONUs are located in different distance intervals from the OLT, the ONU information request message carrying a distance parameter indicating which interval is a target interval among the distance intervals; receiving, by the OLT, ONU information response messages from ONUs which are located in the target interval, in response to the sent ONU information request message; sending, by the OLT, ranging request messages to the ONUs located in the target interval according to the received ONU information response messages; receiving, by the OLT, ranging response messages returned by the ONUs located in the target interval, and obtaining Equalization Delay (EQD) values of the ONUs located in the target interval, according to the sent ranging response messages; and communicating, by the OLT, with the ONUs located in the target interval according to the EQD values.