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    • 5. 发明专利
    • Buffer control method and buffer control device
    • JP5366905B2
    • 2013-12-11
    • JP2010188581
    • 2010-08-25
    • 日本電信電話株式会社
    • 寛之 鵜澤和彦 寺田奈美子 池田昭彦 宮崎正美 浦野
    • H04L12/44H04L13/08
    • PROBLEM TO BE SOLVED: To promote power saving of a PON system by controlling switching of buffers, relating to an ONU equipped with an internal buffer of small capacity and an external buffer of large capacity. SOLUTION: The buffer control method includes: accumulation control processing means 11 which acquires packet information containing at least a packet length and a destination of the packet inputted in an OLT to control accumulation of the packets in a downlink buffer 12 of the OLT; accumulation information management processing means which records and manages the packet information; external buffer triggering state determination processing means 14 which determines whether or not an external buffer of an ONU is in triggering process based on the packet information; and downlink data rate control processing means 15 which, based on the determination result of the external buffer triggering state determination processing means 14, does not adjust output interval of packets to be transmitted to the ONU if the external buffer is not in triggering process, but adjusts the output interval of the packets to be transmitted to the ONU if the external buffer is in triggering process, thus the downlink data rate is limited to a specified value or lower. COPYRIGHT: (C)2012,JPO&INPIT