Patent ID: 7408955
Filing Date: 2008-08-05
Classification: H04Q

Abstract:
1. A GE-PON (Gigabit Ethernet Passive Optical Network) system in a PON (Passive Optical Network) system having an ODN (Optical Distribution Network) as of an optical splitter, comprising: an OLT (Optical Line Termination) for transmitting a downstream window containing both a control frame having a variable timeslot position and variable size information in association with at least two ONUs (Optical Network Units) and Ethernet frames to the ODNs, analyzing contents of RAUs (Request Access Units) in an upstream window which is transmitted from the ONUs according to a TDMA (Time Division Multiplexing Access) method and received from the ODNs, and permitting timeslot position and size corresponding to each of the ONUs; and the at least two ONUs connected to the ODN, wherein the at least two ONUs are configured for having respective timeslot position and size variably allocated in response to respective information contained in the control frame of the downstream window, and transmitting/receiving RAU frames having respective queue information from each ONU's and Ethernet frames to/from the allocated timeslots; wherein the OLT provides permission in the permit control frame to transmit the RAU frames without receiving a request from the ONUs based on a queue level value (QL) in each ONU.