Olt and frame transfer control method
AssigneeNippon Telegraph and Telephone Corporation
InventorsTomoaki KAWAMURA, Shoko OHTERU, Ritsu KUSABA
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Abstract
In a control frame processing unit (14), the number of control frames from a frame demultiplexing unit (13) is counted for each of LLIDs given to the control frames. If the number of frames during a predetermined count period is equal to or smaller than a preset threshold, some or all of the control frames are written in a storage device (30) as processing data. When the number of frames has exceeded the threshold, writing data of the control frames having the LLID in the storage device is stopped. Hence, even when the number of control frames from ONUs increases, software processing can be executed properly.
Claims5
An OLT that is connected to a plurality of ONUs via a PON and connected to a host apparatus via an SNI (Service Node Interface) and mutually transfers a frame to be exchanged between the ONUs and the host apparatus, comprising:
- a storage device that stores processing data as a target of software processing;
- a frame demultiplexing unit that demultiplexes and outputs one of a control frame to be used in the PON and a control frame to be used in the software processing from an upstream frame received from the ONU via the PON;
- and
- a control frame processing unit that counts the number of control frames from said frame demultiplexing unit for each of individual LLIDs (Logical Link IDs) of the ONUs given to the control frames, if the number of frames during a predetermined count period is not more than a preset threshold, writes data formed from some or all of the control frames having the LLID in said storage device as the processing data, and when the number of frames has exceeded the threshold, stops writing data of the control frames having the LLID in said storage device.
A frame transfer control method used in an OLT that is connected to a plurality of ONUs via a PON and connected to a host apparatus via an SNI (Service Node Interface) and mutually transfers a frame to be exchanged between the ONUs and the host apparatus, the method comprising:
- the step of storing processing data as a target of software processing in a storage device;
- the frame demultiplexing step of demultiplexing and outputting one of a control frame to be used in the PON and a control frame to be used in the software processing from an upstream frame received from the ONU via the PON;
- and
- the control frame processing step of counting the number of control frames from the frame demultiplexing step for each of individual LLIDs (Logical Link IDs) of the ONUs given to the control frames, if the number of frames during a predetermined count period is not more than a preset threshold, writing data formed from some or all of the control frames having the LLID in the storage device as the processing data, and when the number of frames has exceeded the threshold, stopping writing data of the control frames having the LLID in the storage device.
Dependencies are inferred from the claim text.