GPON

GPON is a standard about PON. PON are a passive optical network and it has the next steps: Fiber-optic access network, Point to Multipoint, FTTx architecture network, Unpowered Optical Splitter (single optical fiber), Optical Line Terminal (OLT) and the Optical Network Units (ONUs). The way to allocate BW between ONUs is using the Dynamic Bandwidth Allocation (DBA) that is more effective method is required, allocate BW only if needed and uses statistical Multiplexing.

Fiber to the x (FTTx) is a generic term for any broadband network architecture using optical fiber. It was initially a generalization for several configurations of fiber deployment (FTTN, FTTC, FTTB, FTTH...)

An optical network unit (ONU) is a device that transforms incoming optical signals into electronics at a customer's premises in order to provide telecommunications services over an optical fiber network.

An optical line termination (OLT), also called an optical line terminal, is a device which serves as the service provider endpoint of a passive optical network.

Very important is the problem of optimal network planning. Build a PON infrastructure is difficult because it implies installation of many ODN's and there are architecture constraints that have to be respected with cost minimization.

In conclusion, SR algorithms are more promising than NSR. SLA should also consist packet delay requirement and GPON architecture does not immediately support LLU.