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1. 发明授权

US09954617B2 Station-side apparatus in optical transmission system, optical transmission system, and optical transmission method 有权
公开(公告)号：US09954617B2
公开(公告)日：2018-04-24
申请号：US15505559
申请日：2015-08-19
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Kenji Kawai , Yuki Arikawa , Tomoaki Kawamura , Nobuyuki Tanaka , Satoshi Shigematsu , Naoki Miura
IPC分类号： H04B10/27 , H04J14/00 , H04B10/40
CPC分类号： H04B10/27 , H04B10/40 , H04L12/44
摘要： An OLT (1) is formed by N optical transceivers (11), one PON control circuit (12), and one selection and distribution circuit (13). An optical transceiver selection control signal (SC) is transferred from the PON control circuit (12) to the selection and distribution circuit (13). The optical transceiver selection control signal (SC) indicates the timing of a discovery window, the timing of a grant, and a logical link identification number of a registered ONU assigned to the grant (a logical link identification number for a logical link with the registered ONU). The selection and distribution circuit (13) selects one optical transceiver (11-s (s is an integer falling within a range of 0 to N−1)) from the optical transceivers (11-0 to 11-N−1) based on the optical transceiver selection control signal (SC) from the PON control circuit (12).

2. 发明授权

US09602212B2 Optical communication system, optical communication method, higher-network apparatus, and optical line terminal 有权
公开(公告)号：US09602212B2
公开(公告)日：2017-03-21
申请号：US14441423
申请日：2013-11-06
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Shigeru Kuwano , Jun Terada , Noriko Iiyama , Takeshi Sakamoto , Nobuyuki Tanaka , Satoshi Shigematsu
IPC分类号： H04J14/08 , H04B10/27 , H04L12/28 , H04Q11/00 , H04B10/2575
CPC分类号： H04B10/27 , H04B10/25752 , H04J14/08 , H04L12/2861 , H04Q11/0067 , H04Q2011/0064
摘要： A communication system and method comprising a higher-network apparatus and a lower-network apparatus connected through a PON system, which transfers uplink data from the lower-network apparatus to the higher-network apparatus at high speed so as to meet severe conditions required for a delay time between the higher-network apparatus and the lower-network apparatus. The method including a scheduling execution process in which a higher-network apparatus performs scheduling for uplink communication from each of the lower-network apparatus to the device itself and an uplink data transmission permission process in which the higher-network apparatus calculates a transmission time and a transmission permission amount of uplink data transmitted from an ONU to OLT based on the scheduling for uplink communication and notifies the OLT.

3. 发明授权

US11036871B2 PON system, wireless network system, data transfer method, OLT, and ONU 有权
公开(公告)号：US11036871B2
公开(公告)日：2021-06-15
申请号：US16332777
申请日：2017-09-13
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Takeshi Sakamoto , Kenji Kawai , Junichi Kato , Kazuhiko Terada , Hiroyuki Uzawa , Nobuyuki Tanaka , Tomoaki Kawamura
IPC分类号： G06F21/60 , H04L12/44 , H04B10/2575 , H04B10/11 , H04B10/27
摘要： An OLT (10) is provided with a priority control bypass circuit (16) and an encryption/decryption bypass circuit (17), or an ONU (20) is provided with a priority control bypass circuit (26) and an encryption/decryption bypass circuit (27), and one or both of encryption/decryption processing and priority control processing are bypassed in accordance with a priority control bypass instruction (BP) and an encryption/decryption bypass instruction (BE), which are set in advance. This reduces a processing delay that occurs in the OLT or the ONU.

4. 发明授权

US10397133B2 Station-side apparatus in optical transmission system and optical transmission system 有权
公开(公告)号：US10397133B2
公开(公告)日：2019-08-27
申请号：US15745413
申请日：2016-07-14
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Saki Hatta , Tomoaki Kawamura , Kenji Kawai , Nobuyuki Tanaka , Satoshi Shigematsu , Namiko Ikeda , Shoko Ohteru , Junichi Kato
IPC分类号： H04B10/40 , H04B10/50 , H04B10/60 , H04L12/44 , H04Q11/00 , H04L12/911
摘要： An upstream allocation circuit (14) and a downstream allocation circuit (15) are provided in an OLT (1). For example, a superimposed frame obtained by bundling upstream frames (upstream control frames+upstream data frames) from all ONUS is input to the upstream allocation circuit (14) via a frame reproduction circuit (12-1). The superimposed frame may be generated at the stage of optical signals or generated after converting optical signals into electrical signals. The upstream allocation circuit (14) allocates each of the upstream control frames bundled into the superimposed frame to a predetermined PON control circuit (13) based on information (PON port number or LLID) added to the frames. The downstream allocation circuit (15) allocates, to a preset frame reproduction circuit (12), each downstream control frames output from the PON control circuits (13).

5. 发明授权

US10193630B2 Station-side device and optical transmission system 有权
公开(公告)号：US10193630B2
公开(公告)日：2019-01-29
申请号：US15555960
申请日：2016-03-04
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Shoko Ohteru , Namiko Ikeda , Saki Hatta , Satoshi Shigematsu , Nobuyuki Tanaka , Kenji Kawai , Junichi Kato , Tomoaki Kawamura , Hiroyuki Uzawa , Yuki Arikawa , Naoki Miura
IPC分类号： H04J14/08 , H04B10/27 , H04B10/272 , H04L12/44 , H04B10/038 , H04B10/40 , H04J14/02
摘要： A selection and distribution circuit (13) is provided between N optical transceivers (11) and one PON control circuit (12). The selection and distribution circuit (13) selects the optical transceiver (11) corresponding to an upstream frame that time-divisionally arrives, thereby transferring the upstream frame opto-electrically converted by the transceiver (11) to the PON control circuit (12) and distributing a downstream frame from the PON control circuit (12) to each optical transceiver (11). A power supply control circuit (23) stops power supply to at least one of one of optical transceivers (11) that are not used to transfer the frame of the optical transceivers (11) and a circuit that is not used to transfer the frame in the selection and distribution circuit (13). This can reduce the system cost per ONU in the optical transmission system.

6. 发明授权

US10911260B2 Link control circuit 有权
公开(公告)号：US10911260B2
公开(公告)日：2021-02-02
申请号：US16319012
申请日：2017-07-18
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Saki Hatta , Nobuyuki Tanaka , Satoshi Shigematsu
IPC分类号： H04L12/44 , H04J14/02
摘要： A link control circuit (10) includes a plurality of hardware processing units serving as an uplink parser unit (11) configured to output, as an event, the contents of link control notified by an uplink control frame, a timer unit (12) configured to start/stop a timer and output a link event in accordance with expiration of the timer, a frame generation unit (13) configured to generate a downlink control frame containing the contents of link control, and a state management unit (15) configured to manage the state of the link in accordance with these events, and instruct the timer unit to start/stop the timer and the frame generation unit to generate the downlink control frame in accordance with the state of the link, thereby controlling connection establishment, maintenance, and disconnection of the link. Each of the hardware processing units includes a memory configured to store an externally changeable internal program describing a corresponding processing operation, and a processor configured to execute the corresponding processing operation in accordance with the internal program.

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