Patents by Inventor Choon B. Shim

Choon B. Shim 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: 9749337
    Abstract: A method and a system track network access information for authorized network devices. The access information facilitates tracking movement of the device throughout the network. In addition the access information can be used to detect when an unauthorized device attempts to access the network, posing as an authorized device.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: August 29, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Joonbum Byun
  • Patent number: 9491245
    Abstract: The invention relates to a system and method for management of an IP network using eXtensible Markup Language (XML) or a similar protocol in addition to SNMP or other managed-device protocol. In embodiments of the invention, a XML-formatted request for data is received, where the data is associated with a Voice over IP (VoIP) device. A device IP address in a first argument and a Xpath query in a second argument are specified, where the device IP address and the Xpath query are based on the XML-formatted request. A Management Information Base (MIB) variable is identified based on the Xpath query.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: November 8, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Dongwook Shin
  • Publication number: 20160044052
    Abstract: A method and a system track network access information for authorized network devices. The access information facilitates tracking movement of the device throughout the network.
    Type: Application
    Filed: October 19, 2015
    Publication date: February 11, 2016
    Inventors: Choon B. Shim, Joonbum Byun
  • Patent number: 9166983
    Abstract: A method and a system track network access information for authorized network devices. The access information facilitates tracking movement of the device throughout the network. In addition the access information can be used to detect when an unauthorized device attempts to access the network, posing as an authorized device.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: October 20, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Joonbum Byun
  • Patent number: 9030959
    Abstract: An apparatus and method for measuring metrics associated with a wireless network is described. One embodiment includes capturing a packet transmitted over a network and determining a minimum delay of a plurality of previously captured packets, where each previously captured packet of the plurality of previously captured packets is associated with a delay. The embodiment further includes determining a current overall delay of the packet based on features of the packet and calculating a congestion indicator based on the current overall delay and the minimum delay.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: May 12, 2015
    Assignee: Cisco Technology, Inc.
    Inventor: Choon B. Shim
  • Publication number: 20140003277
    Abstract: An apparatus and method for measuring metrics associated with a wireless network is described. One embodiment includes capturing a packet transmitted over a network and determining a minimum delay of a plurality of previously captured packets, where each previously captured packet of the plurality of previously captured packets is associated with a delay. The embodiment further includes determining a current overall delay of the packet based on features of the packet and calculating a congestion indicator based on the current overall delay and the minimum delay.
    Type: Application
    Filed: August 29, 2013
    Publication date: January 2, 2014
    Applicant: Cisco Technology, Inc.
    Inventor: Choon B. Shim
  • Patent number: 8559327
    Abstract: An apparatus and method for measuring metrics associated with a wireless network is described. One embodiment includes capturing a packet transmitted over a network and determining a minimum delay of a plurality of previously captured packets, where each previously captured packet of the plurality of previously captured packets is associated with a delay. The embodiment further includes determining a current overall delay of the packet based on features of the packet and calculating a congestion indicator based on the current overall delay and the minimum delay.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: October 15, 2013
    Assignee: Cisco Technology, Inc.
    Inventor: Choon B. Shim
  • Publication number: 20120287810
    Abstract: A method and a system track network access information for authorized network devices. The access information facilitates tracking movement of the device throughout the network. In addition the access information can be used to detect when an unauthorized device attempts to access the network, posing as an authorized device.
    Type: Application
    Filed: July 24, 2012
    Publication date: November 15, 2012
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Choon B. Shim, Joonbum Byun
  • Patent number: 8243599
    Abstract: A method includes receiving a first capture time corresponding to a first time that a data packet is received at a first probe and a second capture time corresponding to a second time that the data packet is received at a second probe. The data packet is from existing network traffic transmitted over a data network. The first and second probes can be configured to capture the data packet in response to a capture instruction. The first capture time and second capture time are different and are used to calculate the latency of at least a portion of a data network.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: August 14, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Daniel L. Becker, Todd J. Lizambri, Choon B. Shim, Xiang Yu
  • Patent number: 8238352
    Abstract: A method and a system track network access information for authorized network devices. The access information facilitates tracking movement of the device throughout the network. In addition the access information can be used to detect when an unauthorized device attempts to access the network, posing as an authorized device.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: August 7, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Joonbum Byun
  • Patent number: 7965650
    Abstract: In one embodiment, a method includes receiving an internet protocol (IP) packet including encoded media content. A media-quality-value is calculated based on a value of at least one parameter associated with the IP packet and based on a quality equation. The quality equation includes at least one parameter and at least one constant that are defined so that media-quality-values calculated using the quality equation substantially correlate with subjective quality measurements.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: June 21, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Joonbum Byun, Choon B. Shim
  • Publication number: 20110085466
    Abstract: An apparatus and method for measuring metrics associated with a wireless network is described. One embodiment includes capturing a packet transmitted over a network and determining a minimum delay of a plurality of previously captured packets, where each previously captured packet of the plurality of previously captured packets is associated with a delay. The embodiment further includes determining a current overall delay of the packet based on features of the packet and calculating a congestion indicator based on the current overall delay and the minimum delay.
    Type: Application
    Filed: December 17, 2010
    Publication date: April 14, 2011
    Applicant: Cisco Technology, Inc.
    Inventor: Choon B. Shim
  • Patent number: 7894488
    Abstract: An apparatus and method for measuring metrics associated with a wireless network is described. One embodiment includes capturing, at a capturing device, a packet transmitted in a wireless network. A congestion indicator is calculated based on a delay associated with the packet.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: February 22, 2011
    Assignee: Cisco Technology, Inc.
    Inventor: Choon B. Shim
  • Patent number: 7890995
    Abstract: The invention provides a system and method for that facilitating the remote management of one or more networks. In enabling the remote management of a network, embodiments of the invention provide limited access to service providers through a firewall, without the need to modify the configuration of the firewall. Advantageously, the cost of providing such access may be reduced compared to conventional approaches. In addition, such access may be limited to data inquiries or other commands, which can reduce the risk that the security of the network is compromised.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: February 15, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Richard M. Tworek
  • Patent number: 7805517
    Abstract: The invention relates to a system and method for load-balancing multiple servers in a communications network. Instead of using round robin or other predetermined scheme, SIP messages are forwarded to one of multiple SIP servers according to a performance score that is calculated from measured performance data. Advantageously, the disclosed system and method decreases signaling latency, improving overall communications speed. Moreover, where performance data indicates that a SIP server has failed, the performance score for the failed SIP server is zero, and the load balancer will not forward SIP messages to the failed SIP server. System uptime is also improved.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: September 28, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Liehua Xie
  • Patent number: 7702087
    Abstract: An apparatus equipped with Radio Frequency Identity (RFID) reader and LAN/WAN access reads an RFID tag attached to a Video and Voice Over Internet Protocol (VoIP) phone. The apparatus retrieves phone information, including such information as an Ethernet Media Access Control (MAC) address from the RFID tag and requests that a VoIP call server register the phone automatically. A VoIP service operator can register multiple phones without opening phone packaging. Additional information such as a directory number (DN) or a phone user name can be associated with the phone during the registration process using the apparatus.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: April 20, 2010
    Assignee: Cisco Technology, Inc
    Inventors: Choon B. Shim, Joonbum Byun
  • Patent number: 7577239
    Abstract: A system and method track short term and long term intervals to assess whether a voice message source is a likely source of voice spam. Upon detection of a spamming threshold, calls from the source are blocked until detection that a sufficient time interval has elapsed without generation of messages.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: August 18, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Dongwook Shin
  • Patent number: 7450568
    Abstract: The invention provides a system and method for improved management of VoIP networks. In one respect, embodiments of the invention provide a dual channel interface between a control unit and an IP-PBX. In another respect, embodiments of the invention enable the integration of IP-PBX platforms from multiple vendors by utilizing a conversion agent. In yet another respect, embodiments of the invention monitor the performance of IP-PBX's, and/or their power sources, and initiates action where performance is deteriorating and/or where failures have occurred.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: November 11, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Choon B. Shim, Richard M. Tworek
  • Publication number: 20080247331
    Abstract: A method includes receiving a first capture time corresponding to a first time that a data packet is received at a first probe and a second capture time corresponding to a second time that the data packet is received at a second probe. The data packet is from existing network traffic transmitted over a data network. The first and second probes can be configured to capture the data packet in response to a capture instruction. The first capture time and second capture time are different and are used to calculate the latency of at least a portion of a data network.
    Type: Application
    Filed: November 1, 2006
    Publication date: October 9, 2008
    Applicant: Cisco Systems, Inc.
    Inventors: Daniel L. BECKER, Todd J. LIZAMBRI, Choon B. SHIM, Xiang YU
  • Publication number: 20070268836
    Abstract: In one embodiment, a method includes receiving an internet protocol (IP) packet including encoded media content. A media-quality-value is calculated based on a value of at least one parameter associated with the IP packet and based on a quality equation. The quality equation includes at least one parameter and at least one constant that are defined so that media-quality-values calculated using the quality equation substantially correlate with subjective quality measurements.
    Type: Application
    Filed: May 18, 2006
    Publication date: November 22, 2007
    Inventors: Joonbum Byun, Choon B. Shim