DEVICES AND METHODS FOR FLOW CONTROL OF MESSAGES IN AN PASSIVE OPTICAL NETWORK (PON) AND METHODS THEREIN

摘要

A method in an Optical Line Terminal, OLT, device (110) for transmitting a flow control message to an Optical Network Unit/Terminal, ONU/T, device (130; 140) in a Passive Optical Network, PON, access network (100) is provided. The OLT device (110) is configured to receive alarm and/or Attribute Value Change, AVC, messages from the ONU/T device (130; 140). The OLT device (110) is also configured to temporarily store the alarm and/or AVC messages in a message queue. The OLT device (110) generates a flow control message indicating that the ONU/T device (130; 140) is to stop transmitting alarm and/or AVC messages to the OLT device (110), when the number of alarm and/or AVC messages in the message queue exceeds a first threshold. Then, the OLT device (110) transmits the flow control message to the ONU/T device(s) (130; 140). An OLT device (110) for transmitting a flow control message to a ONU/T device (130; 140), an ONU/T device (130; 140) for receiving a flow control message, and method in an ONU/T device (130; 140) for receiving a flow control message is also provided.