Patent ID: 9203545
Filing Date: 2015-12-01
Classification: H04B,H04J,H04Q

Abstract:
1. A method for allocating downlink bandwidth in a nested passive optical network (PON), comprising: receiving, by a primary optical network unit (ONU), a primary PON downlink frame from a nested optical line terminal (OLT), wherein the primary PON downlink frame carries primary PON downlink user service data, secondary PON user service data, primary PON overhead, and secondary PON overhead; parsing, by the primary ONU, the primary PON downlink frame to acquire the primary PON user service data, the secondary PON user service data, the primary PON overhead, and the secondary PON overhead; delivering, by the primary ONU, the primary PON user service data to a user; formulating, by the primary ONU, a secondary ONU downlink bandwidth grant according to the secondary PON user service data and the secondary PON overhead; and sending, by the primary ONU, a secondary PON downlink frame to a secondary ONU according to the secondary ONU downlink bandwidth grant, wherein the secondary PON downlink frame carries the secondary PON user service data and the secondary PON overhead.