Patent ID: 8873958
Filing Date: 2014-10-28
Classification: H04L,H04Q,Y02D

Abstract:
1. A method for controlling downstream scheduling in an Ethernet passive optical network EPON, said method comprising the steps of: i) setting downstream traffic scheduling rules at an optical line terminal OLT for a plurality of ONUs, comprising: ii) transmitting said rules to optical network units ONUs, each ONU owning information of the downstream traffic scheduling rules, such that the ONU infers its current downstream queue status based on historical arrival downstream traffic; iii) according to the inferred queue status, said ONUs making their own sleep decisions based on selective sleep control rules, said sleep control rules, being implemented at said ONUs, being known by said OLT; and iv) based on said sleep control rules, said OLT inferring a status of said ONUs, and buffering incoming downstream traffic of sleeping ONUs responsively.