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公开(公告)号：US20140098682A1
公开(公告)日：2014-04-10
申请号：US13645576
申请日：2012-10-05
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Min Cao , Tak Ming Pang , Hari Rangarajan , Allan Thomson , Hang Jin
CPC classification number: H04W36/0083 , H04W36/32
Abstract: The direction of movement of a wireless local area network client device, determined based on data generated by one or more sensors onboard the client device, is provided by the client device to its serving access point. Using the direction of movement information, a list is generated of neighbor access points that are likely to be in the path of travel of the client device. The list may be generated by the serving access point or another infrastructure device, e.g., a wireless network controller. The serving access point sends the list of neighbor access points to the client device to enable the client device to select an access point to roam to at the appropriate time.
Abstract translation: 根据客户端设备上的一个或多个传感器生成的数据确定的无线局域网客户端设备的移动方向由客户端设备提供给其服务接入点。 使用移动信息的方向，生成可能在客户端设备的行进路径中的邻居接入点的列表。 该列表可以由服务接入点或另一个基础设施设备（例如，无线网络控制器）生成。 服务接入点将邻居接入点列表发送到客户端设备，以使得客户端设备能够在适当的时间选择一个接入点漫游。
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公开(公告)号：US10931328B2
公开(公告)日：2021-02-23
申请号：US16362930
申请日：2019-03-25
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin
IPC: H04B3/20 , H04L12/28 , H04B10/2507
Abstract: Upstream (US) funneling noise suppression may be provided. First, a signal comprising a plurality of mini-slots in a two dimensional time frequency space may be received by a funneling noise suppressor. Next, the power level in each of the plurality of mini-slots may be determined. The received signal may then be outputted. Outputting the received signal may comprises outputting the received signal with mini-slots muted in the received signal that have a power level less than a predetermined threshold.
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公开(公告)号：US20200304170A1
公开(公告)日：2020-09-24
申请号：US16362293
申请日：2019-03-22
Applicant: Cisco Technology, Inc.
Abstract: Proactive Echo Cancellation (EC) training may be provided. First, a plurality of Echo Cancellation Training Opportunities (ECTOs) may be identified in an upstream bandwidth allocation. Identifying the ECTOs may comprise identifying a corresponding plurality of mini-slots in a two dimensional time frequency space designated as not to be used for Upstream (US) traffic. Then Echo Cancellation Training (ECT) may be conducted for each of the plurality of ECTOs.
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公开(公告)号：US20190326949A1
公开(公告)日：2019-10-24
申请号：US15956902
申请日：2018-04-19
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin , John T. Chapman
Abstract: Ringing suppression may be provided. First, a first ringing suppressor in a first branch of an amplifier may cancel interference from a second branch of the amplifier using a transmitted signal from the second branch as a reference. The first ringing suppressor may also cancel echo interference from the first branch of the amplifier using an output of the first ringing suppressor in the first branch as a reference. Furthermore, a second ringing suppressor in the second branch of the amplifier may cancel interference from the first branch of the amplifier using a transmitted signal from the first branch as a reference. Furthermore, the second ringing suppressor may cancel echo interference from the second branch of the amplifier using an output of the second ringing suppressor in the second branch as a reference.
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公开(公告)号：US10177811B2
公开(公告)日：2019-01-08
申请号：US15666628
申请日：2017-08-02
Applicant: CISCO TECHNOLOGY, INC.
Inventor： John T. Chapman , Hang Jin
Abstract: A method is provided in one example and includes receiving a data signal, receiving an interference signal, wherein the interference signal is copied to create a reference data interference signal, combining the data signal and the interference signal to create a combined signal, using an analog echo cancellation engine on the combined signal to create an analog echo cancellation signal, and using a digital echo cancellation engine on the analog echo cancellation signal to create a data with echo cancellation signal. The data with echo cancellation signal can be communicated using a coaxial cable.
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Patent Agency Ranking
26.发明申请公开(公告)号：US20180367852A1
公开(公告)日：2018-12-20
申请号：US15626100
申请日：2017-06-17
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Alon Shlomo Bernstein , Hang Jin
IPC: H04N21/45 , H04N21/442
Abstract: An embodiment of a method includes determining a channel signature for each of a plurality of cable devices associated with a selected household; determining whether at least one of the channel signatures is substantially different than the remaining ones of the channel signatures; and if at least one of the channel signatures is substantially different than the remaining ones of the channel signatures, flagging the selected household for potential theft of services review. Additional embodiments may include determining a radio frequency (“RF”) signal power level for each of the cable devices; calculating a sum of the determined RF signal power levels; determining whether the calculated sum is equal to an RF power signal level measured at a tap of the selected household; and if the calculated sum is not equal to the measured RF power signal level, flagging the selected household for potential theft of services review.
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公开(公告)号：US20180294941A1
公开(公告)日：2018-10-11
申请号：US15483260
申请日：2017-04-10
Applicant: CISCO TECHNOLOGY, INC.
Inventor： John T. Chapman , Hang Jin , Tong Liu
IPC: H04L5/14
CPC classification number: H04L5/14 , H04B3/52 , H04L5/003 , H04L5/0039 , H04L47/76 , H04L47/781
Abstract: An example apparatus comprises a processor, a memory element, and a media access control (MAC) scheduler. The MAC scheduler is configured to implement a transmission-reception (T-R) coordination scheme among a plurality of cable modems in a cable network, wherein the cable modems are categorized into interference groups. The MAC scheduler is further configured to assign one or more of the interference groups to at least one transmission group based upon predetermined criteria; and determine an upstream bandwidth constraint and downstream bandwidth constraint for the at least one transmission group, wherein the upstream bandwidth constraint and downstream bandwidth constraint is implemented by proportionally modifying an allocated upstream bandwidth and an allocated downstream bandwidth for the at least one transmission group to require that the sum of the allocated upstream bandwidth and the allocated downstream bandwidth does not exceed a spectrum capacity for the at least one transmission group.
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公开(公告)号：US20180234130A1
公开(公告)日：2018-08-16
申请号：US15666628
申请日：2017-08-02
Applicant: CISCO TECHNOLOGY, INC.
Inventor： John T. Chapman , Hang Jin
IPC: H04B3/23
CPC classification number: H04B3/23
Abstract: A method is provided in one example and includes receiving a data signal, receiving an interference signal, wherein the interference signal is copied to create a reference data interference signal, combining the data signal and the interference signal to create a combined signal, using an analog echo cancellation engine on the combined signal to create an analog echo cancellation signal, and using a digital echo cancellation engine on the analog echo cancellation signal to create a data with echo cancellation signal. The data with echo cancellation signal can be communicated using a coaxial cable
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公开(公告)号：US09966993B2
公开(公告)日：2018-05-08
申请号：US15052499
申请日：2016-02-24
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Hang Jin , John T. Chapman
CPC classification number: H04B3/32 , H04B1/0475 , H04B1/10 , H04B3/20 , H04B3/487
Abstract: An example method for interference suppression in full duplex cable network environments is provided and includes providing a baseband (BB) reference signal on a first pathway to a signal processor, converting the BB reference signal to a first radio frequency (RF) signal, transmitting the first RF signal on the first pathway, the first RF signal being reflected back on a second pathway, receiving a second RF signal on the second pathway, the second RF signal including interferences from the reflections, generating an RF reference signal based on signals on the first pathway, providing the RF reference signal to the signal processor, providing the second RF signal to the signal processor, and reducing, by the signal processor, interferences in the second RF signal from reflections of the first RF signal based on the BB reference signal and the RF reference signal.
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公开(公告)号：US20170303273A1
公开(公告)日：2017-10-19
申请号：US15130629
申请日：2016-04-15
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Hang Jin , John T. Chapman , Gerard White , Alon Bernstein
CPC classification number: H04W72/0446 , H04L47/72 , H04L47/76 , H04L47/788 , H04L47/822 , H04L47/823 , H04L67/16 , H04W72/1263 , H04W72/14
Abstract: A method is provided in one example embodiment and includes predicting a user average data rate for a cable modem; establishing a minimum bandwidth grant size and a maximum bandwidth grant size for the cable modem based on the predicted user average data rate; receiving from the cable modem a request for a particular amount of bandwidth; performing an overgrant if the particular amount of bandwidth is less than the minimum bandwidth grant size, in which the overgrant comprises granting to the cable modem more than the requested particular amount of bandwidth; and performing an undergrant if the particular amount of bandwidth is greater than the maximum bandwidth grant size, in which the undergrant comprises granting to the cable modem less than the requested particular amount of bandwidth.
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