Devices and methods for flow control of messages in a passive optical network (PON) and methods therein

摘要

A method in an Optical Line Terminal (OLT) device for transmitting a flow control message to an Optical Network Unit/Terminal (ONU/T) device in a Passive Optical Network (PON) access network is provided. The OLT device is configured to receive alarm and/or Attribute Value Change (AVC) messages from the ONU/T device. The OLT device is also configured to temporarily store the alarm and/or AVC messages in a message queue. The OLT device generates a flow control message indicating that the ONU/T device is to stop transmitting alarm and/or AVC messages to the OLT device, when the number of alarm and/or AVC messages in the message queue exceeds a first threshold. Then, the OLT device transmits the flow control message to the ONU/T device(s). An OLT device for transmitting a flow control message to an ONU/T device, and an ONU/T device and related method for receiving a flow control message are also provided.

主权项

1. A method in an Optical Line Terminal (OLT) device for transmitting a flow control message to one or more Optical Network Unit/Terminal (ONU/T) devices in a Passive Optical Network (PON) access network, wherein the OLT device is configured to receive alarm and/or Attribute Value Change (AVC) messages from the one or more ONU/T devices and to temporarily store the alarm and/or AVC messages in a message queue, the method comprising:
detecting from which ONU/T device(s) the alarm and/or AVC messages in the message queue originated; generating the flow control message indicating to stop transmitting the alarm and/or AVC messages to the OLT device, when a number of alarm and/or AVC messages in the message queue exceeds a first threshold, wherein the flow control message indicates at least one of a lower limit of a period of time, an upper limit of the period of time, and both the lower and the upper limit of the period of time for which the ONU/T device(s), from which the alarm and/or AVC messages originated, is to stop transmitting the alarm and/or AVC messages to the OLT device; and transmitting the flow control message only to the ONU/T device(s) from which the alarm and/or AVC messages originated.