Invention Grant
- Patent Title: Communication method, optical communication system, station-side optical-line terminal apparatus, and user-side optical-line terminal apparatus
- Patent Title (中): 通信方式，光通信系统，站侧光线路终端装置和用户侧光线路终端装置
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Application No.: US13395145Application Date: 2010-03-24
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Publication No.: US08687960B2Publication Date: 2014-04-01
- Inventor: Yukio Hirano , Hiroaki Mukai
- Applicant: Yukio Hirano , Hiroaki Mukai
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- International Application: PCT/JP2010/002054 WO 20100324
- International Announcement: WO2011/117917 WO 20110929
- Main IPC: H04B10/20
- IPC: H04B10/20
Abstract:
A communication method of an optical communication system in which a plurality of ONUs are connected to an OLT, includes steps (a) allocating, by the OLT, a transmission bandwidth to an ONU capable of an operation in a sleep mode in which an optical transmitter is tentatively halted for a predetermined sleep period, and transmitting a transmission bandwidth notification to the ONU when the ONU is in the sleep mode and when the ONU is not in the sleep mode; (b) receiving, from the ONU to which the transmission bandwidth is allocated, a response signal when the ONU is not in the sleep mode, wherein the response signal is or is not received during the sleep mode; and (c) suppressing, by the OLT, an alarm in the sleep mode, the alarm being caused by a communication failure with the ONU on a basis of the response signal not being received.
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