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公开(公告)号：US20190028145A1
公开(公告)日：2019-01-24
申请号：US16022252
申请日：2018-06-28
Applicant: Futurewei Technologies, Inc.
Inventor： Yanbin Sun , James Jeng Chen , Tao Ouyang
Abstract: A method, system, and apparatus for calibration for cable modem (CM) echo cancellation (EC) training in full duplex (FDX) coaxial networks is provided. A CM receives a current resource block assignment message (RBA) from a cable modem termination system (CMTS), and determines if designated channels available for assignment as downstream (DS) channels or upstream (US) channels have changed assignment values from a previously received RBA, and if EC training has been performed on the designated channels for the current RBA. If the designated channels have changed assignment values and EC training has not been performed on the designated channels for the current RBA, the CM performs EC training on the designated channels for the current RBA.
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公开(公告)号：US10361748B2
公开(公告)日：2019-07-23
申请号：US15871485
申请日：2018-01-15
Applicant: Futurewei Technologies, Inc.
Inventor： Xiaolong Zhang , Fan Wang , Tao Ouyang , Li Zhang , James Jeng Chen
Abstract: Disclosed herein is a multi-stage echo cancellation scheme. The disclosed embodiments include an apparatus and method for monitoring and canceling echoes greater than 25 dB in a coaxial cable plant. The method includes obtaining echo channel estimate coefficients from a cable node. The method determines a location and strength of each partial echo in an impulse response using the echo channel estimate coefficients. Optionally, the method determines a frequency response of each partial echo in the impulse response.
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公开(公告)号：US10523271B2
公开(公告)日：2019-12-31
申请号：US16022252
申请日：2018-06-28
Applicant: Futurewei Technologies, Inc.
Inventor： Yanbin Sun , James Jeng Chen , Tao Ouyang
Abstract: A method, system, and apparatus for calibration for cable modem (CM) echo cancellation (EC) training in full duplex (FDX) coaxial networks is provided. A CM receives a current resource block assignment message (RBA) from a cable modem termination system (CMTS), and determines if designated channels available for assignment as downstream (DS) channels or upstream (US) channels have changed assignment values from a previously received RBA, and if EC training has been performed on the designated channels for the current RBA. If the designated channels have changed assignment values and EC training has not been performed on the designated channels for the current RBA, the CM performs EC training on the designated channels for the current RBA.
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公开(公告)号：US20180219577A1
公开(公告)日：2018-08-02
申请号：US15871485
申请日：2018-01-15
Applicant: Futurewei Technologies, Inc.
Inventor： Xiaolong Zhang , Fan Wang , Tao Ouyang , Li Zhang , James Jeng Chen
Abstract: Disclosed herein is a multi-stage echo cancelation scheme. The disclosed embodiments include an apparatus and method for monitoring and canceling echoes greater than 25 dB in a coaxial cable plant. The method includes obtaining echo channel estimate coefficients from a cable node. The method determines a location and strength of each partial echo in an impulse response using the echo channel estimate coefficients. Optionally, the method determines a frequency response of each partial echo in the impulse response.
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公开(公告)号：US20180343033A1
公开(公告)日：2018-11-29
申请号：US15988746
申请日：2018-05-24
Applicant: Futurewei Technologies, Inc.
Inventor： Yanbin Sun , James Jeng Chen , Tao Ouyang
CPC classification number: H04B3/487 , H04B3/238 , H04L5/0053 , H04L5/006 , H04L5/143 , H04L5/1461
Abstract: An echo cancellation training method in a cable modern is provided, comprising receiving an echo cancellation service ID (EC SID) assigned for echo cancellation training, the cable modem receiving the EC SID from a cable head end in an information element (IE) in a map (MAP or P-MAP) defining a time and frequency of upstream transmission opportunities for the cable modem, the EC SID establishing when the cable modem may perform the echo cancellation training in a downstream channel allocated to the cable modem, transmitting an echo cancellation test signal upstream to the cable head end via an upstream channel allocated to the cable modem and in a time slot specified by the received EC SID in the map, and measuring noise in one or more downstream channels allocated to the cable modem, with the noise resulting from the transmission of the echo cancellation test signal on the upstream channel.
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Patent Agency Ranking
公开(公告)号：US20180115434A1
公开(公告)日：2018-04-26
申请号：US15788515
申请日：2017-10-19
Applicant: Futurewei Technologies, Inc.
Inventor： Xiaolong Zhang , Li Zhang , Tao Ouyang , James Jeng Chen
CPC classification number: H04L12/2801 , H04L5/14 , H04L12/4625 , H04Q2213/13199
Abstract: A system for cable network communications is provided, comprising a cable modem termination system (CMTS), a trunk cable coupled to the CMTS, cable modems (CMs) divided into at least a low frequency CM group and a high frequency CM group positioned between the CMTS and the low frequency CM group, one or more second taps attached to the trunk cable, with corresponding second drop cables coupled to one or more corresponding CMs of the low frequency CM group, and a first duplexer tap attached to the trunk cable between the CMTS and the one or more second taps, with a corresponding first drop cable coupled to a CM of the high frequency CM group. The first duplexer tap receives an input signal and provides a low frequency signal to the low frequency CM group and a high frequency signal to the high frequency CM group.
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公开(公告)号：US10763915B2
公开(公告)日：2020-09-01
申请号：US15988746
申请日：2018-05-24
Applicant: Futurewei Technologies, Inc.
Inventor： Yanbin Sun , James Jeng Chen , Tao Ouyang
Abstract: An echo cancellation training method in a cable modern is provided, comprising receiving an echo cancellation service ID (EC SID) assigned for echo cancellation training, the cable modem receiving the EC SID from a cable head end in an information element (IE) in a map (MAP or P-MAP) defining a time and frequency of upstream transmission opportunities for the cable modem, the EC SID establishing when the cable modem may perform the echo cancellation training in a downstream channel allocated to the cable modem, transmitting an echo cancellation test signal upstream to the cable head end via an upstream channel allocated to the cable modem and in a time slot specified by the received EC SID in the map, and measuring noise in one or more downstream channels allocated to the cable modem, with the noise resulting from the transmission of the echo cancellation test signal on the upstream channel.
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公开(公告)号：US10299313B2
公开(公告)日：2019-05-21
申请号：US15786308
申请日：2017-10-17
Applicant: Futurewei Technologies, Inc.
Inventor： James Jeng Chen , Li Zhang
Abstract: A cable modem is provided that comprises: a base station interface; a cable network interface that connects the cable modem to a cable modem termination system and one or more other cable modems, the cable network interface communicating using orthogonal frequency-division multiple access (OFDMA); a memory storage comprising instructions; and one or more processors in communication with the cable network interface, the base station interface, and the memory storage. The one or more processors execute the instructions to: receive, via the base station interface, coordination data addressed to a first cable modem of the one or more other cable modems; receive, from the cable modem termination system via the cable network interface, an allocation of a resource block in an OFDMA symbol; and transmit, to the first cable modem via the cable network interface, in the allocated resource block in the OFDMA symbol, the coordination data.
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公开(公告)号：US20180116009A1
公开(公告)日：2018-04-26
申请号：US15786308
申请日：2017-10-17
Applicant: Futurewei Technologies, Inc.
Inventor： James Jeng Chen , Li Zhang
CPC classification number: H04W84/04 , H04L5/0007 , H04L5/0035 , H04L5/0092 , H04W88/02 , H04W88/14 , H04W92/045
Abstract: A cable modem is provided that comprises: a base station interface; a cable network interface that connects the cable modem to a cable modem termination system and one or more other cable modems, the cable network interface communicating using orthogonal frequency-division multiple access (OFDMA); a memory storage comprising instructions; and one or more processors in communication with the cable network interface, the base station interface, and the memory storage. The one or more processors execute the instructions to: receive, via the base station interface, coordination data addressed to a first cable modem of the one or more other cable modems; receive, from the cable modem termination system via the cable network interface, an allocation of a resource block in an OFDMA symbol; and transmit, to the first cable modem via the cable network interface, in the allocated resource block in the OFDMA symbol, the coordination data.
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公开(公告)号：US20180076910A1
公开(公告)日：2018-03-15
申请号：US15701805
申请日：2017-09-12
Applicant: Futurewei Technologies, Inc.
Inventor： Li Zhang , Xiaolong Zhang. , James Jeng Chen , Lifan Xu , Fan Wang
Abstract: A method implemented by a cable modem of a cable network includes sending an upstream test signal during at least one frequency division duplex minislot assigned to the cable modem, receiving other upstream test signals from other cable modems, measuring interference in each received test signal from the other cable modems, and reporting the interference measurement for each received test signal to a cable modem termination system.
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