-
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.
-
公开(公告)号：US10985800B2
公开(公告)日：2021-04-20
申请号：US16792740
申请日：2020-02-17
Applicant: Cisco Technology, Inc.
Inventor： John T. Chapman , Hang Jin , Tong Liu
Abstract: Echo cancellation to alleviate timing varying channels may be provided. First, a feedback signal corresponding to one of a plurality of downstream paths and a combination upstream signal comprising a combination of upstream signals from a plurality of upstream paths may be received. Next, a plurality of echo corrected signals may be created using the feedback signal, the combination upstream signal, and a plurality of echo cancelation coefficients that each respectively correspond to each one of the plurality of echo corrected signals and that are different from each other. Then a one of the plurality of echo cancelation coefficients that corresponds to a one of the plurality of echo corrected signals that provides a best echo cancelation performance as compared to other ones of the plurality of echo corrected signals may be selected to use.
-
公开(公告)号：US10771106B1
公开(公告)日：2020-09-08
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 Cancelation 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 Cancelation Training (ECT) may be conducted for each of the plurality of ECTOs.
-
公开(公告)号：US20200245346A1
公开(公告)日：2020-07-30
申请号：US16257485
申请日：2019-01-25
Applicant: Cisco Technology, Inc.
Inventor： John T. Chapman , Tong Liu , Hang Jin
Abstract: A centralized Upstream (US) scheduling system configured to provide a US split scheduler may be provided. The centralized US scheduling system may comprise a US scheduler and a map editor. The US scheduler may be configured to create a map for US bandwidth allocation. The map may include Steady-State Grants (SGNTs) and Editable Grants (EGNTs). The map editor may be configured to receive the map from the US scheduler and to assign the EGNTs among low latency Service Flows (SFs).
-
公开(公告)号：US20190386701A1
公开(公告)日：2019-12-19
申请号：US16012504
申请日：2018-06-19
Applicant: Cisco Technology, Inc.
Inventor： John T. Chapman , Hang Jin , Tong Liu
Abstract: Echo cancellation to alleviate timing varying channels may be provided. First, a feedback signal corresponding to one of a plurality of downstream paths and a combination upstream signal comprising a combination of upstream signals from a plurality of upstream paths may be received. Next, a plurality of echo corrected signals may be created using the feedback signal, the combination upstream signal, and a plurality of echo cancelation coefficients that each respectively correspond to each one of the plurality of echo corrected signals and that are different from each other. Then a one of the plurality of echo cancelation coefficients that corresponds to a one of the plurality of echo corrected signals that provides a best echo cancelation performance as compared to other ones of the plurality of echo corrected signals may be selected to use.
-
Patent Agency Ranking
公开(公告)号：US20180337868A1
公开(公告)日：2018-11-22
申请号：US15983023
申请日：2018-05-17
Applicant: Cisco Technology, Inc.
Inventor： John T. Chapman , Tong Liu
IPC: H04L12/911 , H04L12/927 , H04L12/863 , H04L12/28
CPC classification number: H04L47/39 , H04L47/24 , H04L47/2441 , H04L47/6215 , H04N21/6168
Abstract: Waterfall granting may be provided. First, a plurality of grants may be received for a service flow. Then a first plurality of packets may be placed in a first queue associated with the service flow in response to determining that the first plurality of packets corresponding to the service flow are associated with a first quality of service level. Next, a second plurality of packets may be placed in a second queue associated with the service flow in response to determining that the second plurality of packets corresponding to the service flow are associated with a second quality of service level. The first plurality of packets in the first queue may then be serviced from the plurality of grants until all the first plurality of packets in the first queue are serviced before servicing any of the second plurality of packets in the second queue with remaining ones of the plurality of grants.
-
17.发明申请公开(公告)号：US20180294837A1
公开(公告)日：2018-10-11
申请号：US15483234
申请日：2017-04-10
Applicant: CISCO TECHNOLOGY, INC.
Inventor： John T. Chapman , Hang Jin , Tong Liu
IPC: H04B3/46 , H04B17/345 , H04L12/28
CPC classification number: H04B3/46 , H04B1/38 , H04B17/345 , H04J11/003 , H04L1/0071 , H04L5/00 , H04L5/0073 , H04L5/14 , H04L12/2801 , H04L12/2885
Abstract: An example apparatus comprises a processor, and a memory element in communication with the processor. The processor configured to send a first message to at least a first cable modem of a plurality of cable modems. The first message indicates an upstream test signal to be generated by the first cable modem within a predetermined portion of a frequency spectrum allocated for downstream communication. The processor is further configured to send a second message to at least a second cable modem of the plurality of cable modems. The second message indicates a downstream interference measurement to be performed on the upstream test signal by the second cable modem. The processor is further configured to receive at least one interference measurement result indicative of the downstream interference measurement, and determine at least one interference group for the plurality of cable modems based upon the at least one interference measurement result.
-
公开(公告)号：US20160072578A1
公开(公告)日：2016-03-10
申请号：US14476969
申请日：2014-09-04
Applicant: Cisco Technology, Inc.
Inventor： Hang Jin , Tong Liu , Pawel Sowinski , De Fu Li , John Skrobko
IPC: H04B10/079 , H04L12/26 , H04J3/16
CPC classification number: H04B10/0795 , H04B10/0793 , H04J3/1694 , H04J14/086 , H04L12/2801 , H04L43/0882
Abstract: Presented herein are techniques for detection and avoidance of interference in a telecommunications network. In one example, a cable modem termination system (CMTS) is configured to receive upstream traffic from a plurality of cable modems. The CMTS detects collision characteristics resulting from substantially simultaneous transmissions from different combinations of the cable modems. Based on the detected collision characteristics, the CMTS designates/identifies collision groups for each of a plurality of the cable modems. After designation of the collision groups, the CMTS schedules upstream transmissions by the plurality of cable modems such that cable modems within the same collision group do not transmit within a same time frame and such that two or more cable modems that are not within the same collision group may transmit within a same time frame.
Abstract translation: 这里提出的是用于检测和避免电信网络中的干扰的技术。 在一个示例中，电缆调制解调器终端系统（CMTS）被配置为从多个电缆调制解调器接收上行流量。 CMTS检测来自电缆调制解调器的不同组合的基本同时传输产生的冲突特性。 基于检测到的碰撞特性，CMTS指定/识别多个电缆调制解调器中的每一个的冲突组。 在指定冲突组之后，CMTS调度多个电缆调制解调器的上行传输，使得同一冲突组内的电缆调制解调器在相同的时间帧内不发送，并且使得两个或更多个不在同一冲突内的电缆调制解调器 组可以在相同的时间帧内传输。
-
公开(公告)号：US20230043675A1
公开(公告)日：2023-02-09
申请号：US17392352
申请日：2021-08-03
Applicant: Cisco Technology, Inc.
Inventor： Tong Liu , Isha Girdhar , Rutuja Pravin Kharche , Priyadarshini Anand
IPC: H04L12/721 , H04L12/715 , H04L12/751 , H04L12/707
Abstract: In one embodiment, a first path computation element (PCE) receives a request from a gateway for service chain functions (SFs) to be applied to a traffic flow, wherein a first subset of the SFs is located in a first zone. The first PCE identifies a boundary node located at a border between the first zone and a second zone where a second subset of the SFs are located. The first PCE sends a response to the gateway indicating a path within the first zone between the gateway and the boundary node to apply the first subset of SFs to the flow. The first PCE provides information regarding the flow and the boundary node to a second PCE that uses the information to configure the boundary node to route the flow in the second zone to apply the second subset of SFs to the flow.
-
公开(公告)号：US11038811B2
公开(公告)日：2021-06-15
申请号：US15983023
申请日：2018-05-17
Applicant: Cisco Technology, Inc.
Inventor： John T. Chapman , Tong Liu
IPC: H04L12/911 , H04L12/927 , H04L12/801 , H04L12/851 , H04L12/28 , H04L12/863 , H04N21/61
Abstract: Waterfall granting may be provided. First, a plurality of grants may be received for a service flow. Then a first plurality of packets may be placed in a first queue associated with the service flow in response to determining that the first plurality of packets corresponding to the service flow are associated with a first quality of service level. Next, a second plurality of packets may be placed in a second queue associated with the service flow in response to determining that the second plurality of packets corresponding to the service flow are associated with a second quality of service level. The first plurality of packets in the first queue may then be serviced from the plurality of grants until all the first plurality of packets in the first queue are serviced before servicing any of the second plurality of packets in the second queue with remaining ones of the plurality of grants.
-
-
-
-
-
-
-
-
-
Search Results
26
records
(took 0.019 seconds)
