Patents by Inventor Ki Hyun Joo

Ki Hyun Joo 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: 7965685
    Abstract: A wireless office communication system including a wireless internet base station (WIBS) encompassing a base station controller, a mobile switch controller and an ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. A wireless office communication system can also be based on the conventional architecture comprising the BTS, BSC and MSC. The WIBS or BTS is attached to a number of antennas via different and identifiable delay elements for the purpose of determining the serving antennas of mobile communication units. A location determination logic enables the system to handle handoffs between a WIBS or BTS and the external public communication system in an optimum manner.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: June 21, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Ki Hyun Joo, Peter S. Rha, Chol Su Kang, Sang Kyoon Hyun
  • Patent number: 7483410
    Abstract: A wireless office communication system including a multi-protocol wireless internet base station (WIBS) encompassing a base station controller, a mobile switch controller and an ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. The interface module provides for coupling the WIBS to an ethernet back-bone, a mobile communication unit and a public switch telephone network (PSTN). In one embodiment of the invention, a maintenance and operation server is coupled to the ethernet back-bone to allow a technician to remotely call into the enterprise system from a mobile system such as a lap-top computer or a personal digital assistant (PDA) to perform typical system operations and maintenance functions via the internet.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: January 27, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Ki-Hyun Joo, Chol Su Kang, Jay Wu Hong, Choi Young, II
  • Patent number: 7154870
    Abstract: A wireless office communication system including a wireless internet base station (WIBS) encompassing a base station controller (BSC), a mobile switch controller (MSC), and an ethernet interface module for coupling the wireless internet base station (WIBS) to an existing internet protocol (IP) based network. A wireless office communication system can also be based on the conventional architecture comprising the base station transceiver subsystem BTS, BSC, and MSC. The WIBS or BTS is attached to a number of antennas via different and identifiable delay elements for the purpose of determining the serving antennas of mobile communication units. A location determination logic enables the system to handle handoffs between a WIBS or BTS and the external public communication system in an optimum manner.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: December 26, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Ki Hyun Joo, Peter S. Rha, Chol Su Kang, Sang Kyoon Hyun
  • Patent number: 7120133
    Abstract: A wireless office communication system including a multi-protocol wireless internet base station (WIBS) encompassing a base station controller (BSC), a mobile switch controller (MSC) and an ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. The interface module provides for coupling the WIBS to an ethernet back-bone, a mobile communication unit and a public switch telephone network (PSTN). In one embodiment the wireless communication system includes wireless signaling logic and media gateway logic to enable the wireless office communication system to handle signal transmission between a mobile terminal and a media gateway. A virtual circuit identity code (VCIC) enables the base station to provide a virtual traffic path (VTP) to link communications between TIA/EIA-634 wireless signaling and media gateway control protocol (MGCP).
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: October 10, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Ki-Hyun Joo, Chol Su Kang, Sung Goo Shim, Jay Wu Hong
  • Patent number: 7046652
    Abstract: A wireless office communication system including a multi-protocol, multi-sector wireless internet base station (WIBS) encompassing a base station controller, a mobile switch controller and an Ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. The interface module provides for coupling the WIBS to an Ethernet back-bone, a mobile communication unit and a public switch telephone network (PSTN). In one embodiment of the invention, stackable base modules including a transceiver, channel elements and an Ethernet interface unit are integrated in a base station to provide scalability of an enterprise wireless network.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: May 16, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: SangKyoon Hyun, Ki-Hyun Joo, Chol Su Kang
  • Patent number: 7016331
    Abstract: A wireless office communication system including a wireless internet base station (WIBS) encompassing a base station controller (BSC), a mobile switch controller (MSC), and an ethernet interface module for coupling the wireless internet base station (WIBS) to an existing internet protocol (IP) based network. A wireless office communication system can also be based on the conventional architecture comprising the base station transceiver subsystem BTS, BSC, and MSC. The WIBS or BTS is attached to a number of antennas via different and identifiable delay elements for the purpose of determining the serving antennas of mobile communication units. A location determination logic enables the system to handle handoffs between a WIBS or BTS and the external public communication system in an optimum manner.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: March 21, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Ki Hyun Joo, Peter S. Rha, Chol Su Kang, Sang Kyoon Hyun
  • Patent number: 7006479
    Abstract: A wireless office communication system including a multi-protocol wireless internet base station (WIBS) encompassing a base station controller, a mobile switch controller and an ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. The interface module provides for coupling the WIBS to an ethernet back-bone, a mobile communication unit and a public switch telephone network (PSTN). In one embodiment of the invention, a maintenance and operation server is coupled to the ethernet back-bone to allow a technician to remotely call into the enterprise system from a mobile system such as a lap-top computer or a personal digital assistant (PDA) to perform typical system operations and maintenance functions via the internet.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: February 28, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Ki-Hyun Joo, Chol Su Kang, Jay Wu Hong, Choi Young, II
  • Patent number: 6967938
    Abstract: A wireless office communication system including a wireless internet base station (WIBS) encompassing a base station controller, a mobile switch controller, and an ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. The interface module provides for coupling the WIBS to an ethernet back-bone, a mobile communication unit and a public switch telephone network (PSTN). In one embodiment, the wireless communication system includes a wireless internet server which also encompasses base station controller and mobile switch controller functions to enable the wireless communication system to manage call mobility with the system. In one embodiment, communication between the WIBS and the PSTN is in an IP data protocol format. The WIBs provides control and sequencing of all call control operations by handling both voice and data calls which are transmitted over the ethernet back-bone to the PSN or the internet.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: November 22, 2005
    Assignee: Cisco Technology, Inc.
    Inventors: Chol Su Kang, Sang Kyoon Hyun, Ki Hyun Joo
  • Patent number: 6901061
    Abstract: A wireless office communication system including a wireless internet base station (WIBS) encompassing a base station controller, a mobile switch controller and an ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. A wireless office communication system can also be based on the conventional architecture comprising the BTS, BSC and MSC. The WIBS or BTS is attached to a number of antennas via different and identifiable delay elements for the purpose of determining the serving antennas of mobile communication units. A location determination logic enables the system to handle handoffs between a WIBS or BTS and the external public communication system in an optimum manner.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: May 31, 2005
    Assignee: Cisco Technology, Inc.
    Inventors: Ki Hyun Joo, Peter S. Rha, Chol Su Kang, Sang Kyoon Hyun
  • Publication number: 20020089951
    Abstract: A wireless office communication system including a multi-protocol, multi-sector wireless internet base station (WIBS) encompassing a base station controller, a mobile switch controller and an Ethernet interface module for coupling the WIBS to an existing internet protocol (IP) based network. The interface module provides for coupling the WIBS to an Ethernet back-bone, a mobile communication unit and a public switch telephone network (PSTN). In one embodiment of the invention, stackable base modules including a transceiver, channel elements and an Ethernet interface unit are integrated in a base station to provide scalability of an enterprise wireless network.
    Type: Application
    Filed: January 9, 2001
    Publication date: July 11, 2002
    Inventors: SangKyoon Hyun, Ki-Hyun Joo, Chol Su Kang