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公开(公告)号：US10797467B2
公开(公告)日：2020-10-06
申请号：US16170125
申请日：2018-10-25
申请人： ADTRAN, Inc.
发明人： Daniel M. Joffe , Leif Sandstrom
IPC分类号： H01S5/0683 , H01S5/00 , H04B10/516 , H01S5/10 , H01S5/06
摘要： An optical transmission system includes a laser module generating a modulated optical waveform, including both amplitude and frequency modulation, at center frequencies corresponding to different operating temperatures; and an optical shaping filter, with passbands corresponding to the different center frequencies, that converts at least part of the frequency modulation to additional amplitude modulation. The optical transmission system is tuned by: determining a range of temperatures at which the laser module center frequencies are within a passband of the optical shaping filter; setting the laser module to a temperature, within the range of temperatures, at which the modulated optical waveform is within the passband; measuring an average output power of the optical shaping filter; and adjusting the temperature of the laser module to a target temperature, within the range of temperatures, at which an output condition is achieved, based on the average output power and/or extinction ratio of the filtered waveform.
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公开(公告)号：US10749623B2
公开(公告)日：2020-08-18
申请号：US16228848
申请日：2018-12-21
申请人： ADTRAN, Inc.
摘要： Methods, systems, and apparatus for hosting an optical line terminal (OLT) bonding engine are disclosed. In one aspect, packet data for transmission over a passive optical (PON) is selected. A transmission wavelength assigned to the packet data is identified. A particular OLT is selected from among the additional OLTs to transmit the packet data over the PON based on the corresponding wavelength of the particular OLT matching the identified transmission wavelength assigned to the packet. The packet data is formatted based on the particular OLT. The formatted packet data is transmitted to the particular OLT for transmission over the communications interface.
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公开(公告)号：US10715890B2
公开(公告)日：2020-07-14
申请号：US16199533
申请日：2018-11-26
申请人： ADTRAN, Inc.
摘要： Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optimizing PON efficiency using a variable FEC. In one aspect, an OLT broadcasts a message over an optical network, and receives, from an ONU, a response to the message. The OLT transmits activation parameters specifying that the OLT supports multiple different FEC code lengths when FEC is activated, and receives from the ONU, a set of FEC code lengths supported by the ONU. The OLT also receives performance measures collected by the ONU. The OLT selects, from among the FEC code lengths supported by the ONU, one or more appropriate FEC code lengths for communications between the ONU and the OLT based on the performance measures collected by the ONU and performance measures collected by the OLT. The OLT configures the ONU to utilize the appropriate FEC code length.
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公开(公告)号：US10547407B2
公开(公告)日：2020-01-28
申请号：US16159285
申请日：2018-10-12
申请人： ADTRAN, Inc.
发明人： Jared Cress
IPC分类号： H04J14/08 , H04J14/02 , H04Q11/00 , H04B10/272
摘要： Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for reducing jitter and latency in a PON. In one aspect, an optical network unit includes a downstream optical receiver configured to receive downstream traffic over a first wavelength; a first upstream optical transmitter having a first data rate; a second upstream optical transmitter having a second data rate that is higher than the first data rate; and a controller configured to direct upstream traffic to one of the first upstream optical transmitter or the second upstream optical transmitter depending on a traffic type of the traffic. Traffic having a control plane traffic type is directed to the first upstream optical transmitter and traffic having a data plane traffic type is directed to the second upstream optical transmitter.
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公开(公告)号：US20190318238A1
公开(公告)日：2019-10-17
申请号：US15952887
申请日：2018-04-13
申请人： ADTRAN, Inc.
发明人： Armand Nokbak Nyembe , Sheila Knight , Michael Arnold , Ramya Raghavendra , Jeremy Lyon , Venkata Mallikarjunarao Kosuri , Zack Whaley
摘要： Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for an artificial intelligence system. In one aspect, a system includes multiple artificial intelligence skill agents that have each been trained to perform different actions in a telecommunications system. The system also includes an orchestrator agent that interacts with each of the artificial intelligence skill agents and coordinates which of the artificial intelligence agents performs actions in response to user inputs. The orchestrator agent receives a user input and determines an intent expressed by the user input. The orchestrator agent transmits an instruction to an artificial intelligence skill agent to perform an action that provides a response to the intent. In response to receiving the instruction from the orchestrator agent, the artificial intelligence skill agent performs the action when the artificial intelligence skill agent is capable of carrying out the action.
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公开(公告)号：US20190280795A1
公开(公告)日：2019-09-12
申请号：US15713143
申请日：2017-09-22
申请人： ADTRAN, INC.
发明人： Martin Kuipers
摘要： A time-division duplexing (TDD) system reduces crosstalk associated with signals communicated by coordinated dynamic time assignment (cDTA) transceivers. In some embodiments, the TDD system has both cDTA transceivers and legacy transceivers. Based on the dynamic allocation of downstream and upstream timeslots for the cDTA transceivers, timeslots for the legacy transceivers are selectively muted in an effort to limit the amount of near-end crosstalk (NEXT) that occurs in the TDD system. Thus, subscriber lines coupled to both cDTA transceivers and legacy transceivers may be bound within the same binder without significantly increasing crosstalk to unacceptable levels.
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公开(公告)号：US20190173980A1
公开(公告)日：2019-06-06
申请号：US16207521
申请日：2018-12-03
申请人： ADTRAN, Inc.
摘要： Methods, systems, and apparatus for payload compression are disclosed. In one aspect, a determination is made that one or more fields of a packet to be transmitted are compressible based on a compression table. Prior to transmitting the packet and in response to the determination, the one or more fields of the packet are compressed based on the compression table. Compressing the one or more fields of the packet includes removing the one or more fields from the packet to generate a compressed packet. One or more bits in a header of the compressed packet are modified to indicate at least one compression entry in the compression table associated with the compression performed on the compressed packet.
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公开(公告)号：US10298725B2
公开(公告)日：2019-05-21
申请号：US14938424
申请日：2015-11-11
申请人： Adtran, Inc.
摘要： Methods and apparatus for communicating synchronous digital signals through an asynchronous domain are disclosed. In one aspect a method includes receiving a first synchronous digital signal of a first domain, wherein the first synchronous digital signal is generated by a first device for communication to a second device; encapsulating the first synchronous digital signal of the first domain into a first asynchronous packet of a second domain; and transmitting the first asynchronous packet to an asynchronous network of the second domain.
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公开(公告)号：US10205551B2
公开(公告)日：2019-02-12
申请号：US15400073
申请日：2017-01-06
申请人： ADTRAN, Inc.
发明人： Jared D. Cress , Nagaraj Padur
IPC分类号： H04J14/02 , H04B10/079
摘要： Systems and methods are provided for an optical network unit (ONU) to automatically set its output power level for messages to be transmitted on a passive optical network. The ONU can autonomously determine the appropriate power level based on information provided to the ONU by an optical line terminal (OLT) and characterization by the ONU of optical signals it receives from the fiber. Specifically, the OLT can provide the ONU with control data indicative of the power level used by the OLT to transmit the message and the desired power level of the OLT for messages from the ONU. The ONU can measure the power level of at least one message received from the OLT and determine the path loss based on the measured power and the control data. The ONU can then automatically determine a suitable power level for its response message such that unacceptable levels of crosstalk between channels are avoided without having to perform an iterative power-leveling process that otherwise may introduce significant delays.
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公开(公告)号：US20190036800A1
公开(公告)日：2019-01-31
申请号：US15661500
申请日：2017-07-27
申请人： ADTRAN, Inc.
IPC分类号： H04L12/26
摘要： Methods, systems, and apparatus for determining a loop length of a link. In some implementations, a method includes obtaining timing information for bi-directional communications over a link that is being initialized or is in showtime and determining a loop length of the link using the timing information while the link is being initialized or is in showtime. The timing information used while the link is being initialized can include a time value used to align data transmissions over the link. The timing information used while the link is in showtime can include times at which time synchronization events occur on the link while the link is in showtime.
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