Patents by Inventor Kyeong-Hee Han

Kyeong-Hee Han 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: 8238918
    Abstract: The present invention relates to a method of performing handover from an asynchronous mobile communication network to a synchronous mobile communication network. If the access network of the asynchronous mobile communication network (100) requests handover to an MSC (104) of the asynchronous mobile communication network, the MSC requests/receives subscriber information of the mobile communication terminal from a dual-stack HLR (300), and transmits a handover request message to the synchronous mobile communication network (200). The MSC (203) of the synchronous mobile communication network assigns a forward channel to the mobile communication terminal. The asynchronous mobile communication network (100) transmits a handover instruction message to the asynchronous RF device of the mobile communication terminal. Accordingly, the mobile communication terminal sets up a synchronous RF device, connects to the synchronous mobile communication network through reverse channel assignment and synchronization.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: August 7, 2012
    Assignee: SK Telecom Co., Ltd.
    Inventors: Sang-Yun Lee, Jae-Young Ju, Hee-Hyeok Hahm, Young-Ho Joo, Bum-Soo Shin, Kyeong-Hee Han
  • Patent number: 8014773
    Abstract: In the mobile communication system, asynchronous and synchronous Mobile Switching Centers (MSCs) are interconnected via an Interworking Interoperability Function (IIF), and are connected to a Dual stack Home Location Register (D-HLR). The D-HLR stores and manages asynchronous subscription and synchronous subscription information of the mobile communication terminal. The IIF stores and manages the synchronous mobile communication system information, receives the synchronous subscription information of the mobile communication terminal from the D-HLR, transmits synchronous system information and the synchronous subscription information of the mobile communication terminal to the synchronous MSC and receives a response from the synchronous MSC, and requests the asynchronous MSC to release a wireless connection when the mobile communication terminal and the synchronous mobile communication system are interconnected and notification of completion of the handover is provided.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: September 6, 2011
    Assignee: SK Telecom Co., Ltd.
    Inventors: Jae Young Ju, Sang-Yun Lee, Hee-Hyeok Hahm, Soo Jin Kim, Bum-Soo Shin, Kyeong-Hee Han, Young-Ho Ju, Hyun Ki Hong, Young Ahn Ryu
  • Publication number: 20090129359
    Abstract: The present invention relates to a method of performing handover from an asynchronous mobile communication network to a synchronous mobile communication network. If the access network of the asynchronous mobile communication network (100) requests handover to an MSC (104) of the asynchronous mobile communication network, the MSC requests/receives subscriber information of the mobile communication terminal from a dual-stack HLR (300), and transmits a handover request message to the synchronous mobile communication network (200). The MSC (203) of the synchronous mobile communication network assigns a forward channel to the mobile communication terminal. The asynchronous mobile communication network (100) transmits a handover instruction message to the asynchronous RF device of the mobile communication terminal. Accordingly, the mobile communication terminal sets up a synchronous RF device, connects to the synchronous mobile communication network through reverse channel assignment and synchronization.
    Type: Application
    Filed: April 19, 2005
    Publication date: May 21, 2009
    Applicant: SK TELECOM CO., LTD.
    Inventors: Sang-Yun Lee, Jae-Young Ju, Hee-Hyeok Hahm, Young-Ho Joo, Bum-Soo Shin, Kyeong-Hee Han
  • Publication number: 20080287131
    Abstract: In the mobile communication system, asynchronous and synchronous Mobile Switching Centers (MSCs) are interconnected via an Interworking Interoperability Function (HF), and are connected to a Dual stack Home Location Register (D-HLR). The D-HLR stores and manages asynchronous subscription and synchronous subscription information of the mobile communication terminal. The HF stores and manages the synchronous mobile communication system information, receives the synchronous subscription information of the mobile communication terminal from the D-HLR, transmits synchronous system information and the synchronous subscription information of the mobile communication terminal to the synchronous MSC and receives a response from the synchronous MSC, and requests the asynchronous MSC to release a wireless connection when the mobile communication terminal and the synchronous mobile communication system are interconnected and notification of completion of the handover is provided.
    Type: Application
    Filed: April 19, 2005
    Publication date: November 20, 2008
    Applicant: SK TELECOM CO., LTD.
    Inventors: Jae Young Ju, Sang-Yun Lee, Hee-Hyeok Hahm, Soo Jin Kim, Bum-Soo Shin, Kyeong-Hee Han, Young-Ho Ju, Hyun Ki Hong, Young Ahn Ryu
  • Publication number: 20080137607
    Abstract: Disclosed are a method and a system for management of handover only trunk line between mobile switching centers for handover in a mixed mobile communication system of an asynchronous network and a synchronous network. The invention is performed to connect and disconnect a trunk line between asynchronous mobile switching centers and synchronous mobile switching centers, thereby sending and receiving of trunk line management messages wherein the message types are reset circuit message, blocking message, trunk test message and other additional types of message.
    Type: Application
    Filed: March 10, 2005
    Publication date: June 12, 2008
    Applicant: Sk Telecom Co., Ltd.
    Inventors: Jae-Yong Ju, Sang-Yun Lee, Hee-Hyeok Hahm, Young-Ho Joo, Kyeong-Hee Han