Patents by Inventor Kathy Xia Ke

Kathy Xia Ke has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11063781
    Abstract: Systems and methods herein can convert downstream group addressed packets to unicast packets and send them to Workgroup Bridges (WGBs) by Downlink (DL) Multiple-User (MU) Orthogonal Frequency Division Multiple Access (OFDMA) (DL-MU-OFDMA). A Wireless Controller (WLC)/Access Point (AP) can extend current Inter-Access Point Protocol (IAPP) messages for broadcast and deploy Internet Group Management Protocol (IGMP) processing for multicast messages. The APs can maintain WGB entries for each group address. When there is a downstream broadcast packet received at the AP, the AP can search the entries in the domain and can build a 4-address unicast packet for each WGB, then transmit those converted packets in parallel by DL-OFDMA. After receiving those converted packets over the air, the WGB simply rebuilds 802.3 packets and forwards the 802.3 packets to the corresponding VLAN domain.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: July 13, 2021
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Jun Liu, Jing Wang, Yong Wang, Kathy Xia Ke
  • Publication number: 20210119815
    Abstract: Systems and methods herein can convert downstream group addressed packets to unicast packets and send them to Workgroup Bridges (WGBs) by Downlink (DL) Multiple-User (MU) Orthogonal Frequency Division Multiple Access (OFDMA) (DL-MU-OFDMA). A Wireless Controller (WLC)/Access Point (AP) can extend current Inter-Access Point Protocol (IAPP) messages for broadcast and deploy Internet Group Management Protocol (IGMP) processing for multicast messages. The APs can maintain WGB entries for each group address. When there is a downstream broadcast packet received at the AP, the AP can search the entries in the domain and can build a 4-address unicast packet for each WGB, then transmit those converted packets in parallel by DL-OFDMA. After receiving those converted packets over the air, the WGB simply rebuilds 802.3 packets and forwards the 802.3 packets to the corresponding VLAN domain.
    Type: Application
    Filed: October 22, 2019
    Publication date: April 22, 2021
    Applicant: Cisco Technology, Inc.
    Inventors: Jun Liu, Jing Wang, Yong Wang, Kathy Xia Ke
  • Patent number: 10389615
    Abstract: In one embodiment, enhanced packet flow monitoring is performed by packet switching devices in a network. A packet switching device is configured to monitor a flow of packets passing through the packet switching device, including detecting a gap in consecutive packets of the flow of packets, and attributing the gap as not being dropped one or more packets based on a particular time duration between a last received packet of the flow of packets before said detected gap and a first received packet of the flow of packets after said detected gap. In one embodiment, the gap is attributed to not being dropped packets when the particular time duration is greater than a threshold value; and conversely, attributed to being dropped packets when the particular time duration is less than a same or different threshold value.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: August 20, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Tony Changhong Shen, Yu Zhang, Alan Xiao-Rong Wang, Aviv Prital, Doron Oz, Kathy Xia Ke
  • Patent number: 10341140
    Abstract: In one embodiment, a packet switching device is configured to operate as a spoke or a hub in a Dynamic Multipoint Virtual Private Network (DMVPN) using one or more initially negotiated service overlay capabilities including service encapsulation to use in communicating service overlay data packets between the packet switching device and another device (e.g., spoke, hub) of the DMVPN over an established tunnel (e.g., secure protocol channel). The packet switching device is further configured to negotiate updated one or more service overlay capabilities including updated service encapsulation to use in communicating service overlay data packets with another device (e.g., spoke, hub) without dropping the already established tunnel. In one embodiment, the negotiation between the packet switching device and another device (e.g., spoke, hub) of the DMVPN uses Next Hop Resolution Protocol (NHRP). In one embodiment, the service encapsulation uses Network Service Header (NSH).
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: July 2, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Tony Changhong Shen, Di Cheng, Will Lipeng Jiang, Kathy Xia Ke
  • Publication number: 20170230199
    Abstract: In one embodiment, a packet switching device is configured to operate as a spoke or a hub in a Dynamic Multipoint Virtual Private Network (DMVPN) using one or more initially negotiated service overlay capabilities including service encapsulation to use in communicating service overlay data packets between the packet switching device and another device (e.g., spoke, hub) of the DMVPN over an established tunnel (e.g., secure protocol channel). The packet switching device is further configured to negotiate updated one or more service overlay capabilities including updated service encapsulation to use in communicating service overlay data packets with another device (e.g., spoke, hub) without dropping the already established tunnel. In one embodiment, the negotiation between the packet switching device and another device (e.g., spoke, hub) of the DMVPN uses Next Hop Resolution Protocol (NHRP). In one embodiment, the service encapsulation uses Network Service Header (NSH).
    Type: Application
    Filed: February 4, 2016
    Publication date: August 10, 2017
    Applicant: Cisco Technology, Inc., a corporation of California
    Inventors: Tony Changhong Shen, Di Cheng, Will Lipeng Jiang, Kathy Xia Ke
  • Publication number: 20160380869
    Abstract: In one embodiment, enhanced packet flow monitoring is performed by packet switching devices in a network. A packet switching device is configured to monitor a flow of packets passing through the packet switching device, including detecting a gap in consecutive packets of the flow of packets, and attributing the gap as not being dropped one or more packets based on a particular time duration between a last received packet of the flow of packets before said detected gap and a first received packet of the flow of packets after said detected gap. In one embodiment, the gap is attributed to not being dropped packets when the particular time duration is greater than a threshold value; and conversely, attributed to being dropped packets when the particular time duration is less than a same or different threshold value.
    Type: Application
    Filed: June 29, 2015
    Publication date: December 29, 2016
    Applicant: Cisco Technology, Inc., a corporation of California
    Inventors: Tony Changhong Shen, Yu Zhang, Alan Xiao-Rong Wang, Aviv Prital, Doron Oz, Kathy Xia Ke
  • Patent number: 9503272
    Abstract: In one embodiment, a method includes discovering at a first edge device in a first network that a multicast source has moved from the first network to a second network, the first edge device in communication through a core network with a plurality of edge devices belonging to a multicast group comprising the multicast source, transmitting from the first edge device to a second edge device in the second network, a join request for the multicast group comprising the multicast source at the second network, receiving multicast traffic for the multicast group at the first edge device on a transient multicast tree extending from the second edge device to the plurality of edge devices, and forwarding the multicast traffic to the plurality of edge devices. An apparatus and logic are also disclosed herein.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: November 22, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Fang Yang, Kathy Xia Ke, Isidoros Kouvelas, Christian Cassar
  • Publication number: 20150263864
    Abstract: In one embodiment, a method includes discovering at a first edge device in a first network that a multicast source has moved from the first network to a second network, the first edge device in communication through a core network with a plurality of edge devices belonging to a multicast group comprising the multicast source, transmitting from the first edge device to a second edge device in the second network, a join request for the multicast group comprising the multicast source at the second network, receiving multicast traffic for the multicast group at the first edge device on a transient multicast tree extending from the second edge device to the plurality of edge devices, and forwarding the multicast traffic to the plurality of edge devices. An apparatus and logic are also disclosed herein.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 17, 2015
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Fang Yang, Kathy Xia Ke, Isidoros Kouvelas, Christian Cassar