Patents by Inventor Se-Kang Park
Se-Kang Park 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).
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Patent number: 7450719Abstract: A Gigabit Ethernet-based passive optical network that can reliably transmit data is disclosed. The network includes an OLT for receiving a public key through a transmission medium, encrypting a secret key by means of the received public key, transmitting the encrypted secret key, encrypting data by means of the secret key, and transmitting the encrypted data, the OLT being located in a service provider-side. The network also includes an ONT for transmitting the public key to the OLT, receiving the secret key transmitted from the OLT, decrypting the secret key by means of a private key, receiving the data, and decrypting the received data by means of the decrypted the secret key. The public key is used for encrypting the secret key. The secret key is encrypted by means of the public key. The data is encrypted by the OLT by means of the secret key.Type: GrantFiled: January 16, 2004Date of Patent: November 11, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Hak-Phil Lee, Se-Kang Park, Whan-Jin Sung, Young-Seok Kim, Yun-Je Oh, Jun-Sung An, Tae-Sung Park, Su-Hyung Kim
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Patent number: 7292784Abstract: A high speed optical routing apparatus and method, in which data traffic, such as an IP packet, an Ethernet frame, etc., is switched in an optical frame unit at a high speed. The apparatus is provided with a plurality of input and output ports, and with one add port for adding data received from a lower IP router, and one drop port for dropping processed data toward the lower IP router. A header wavelength dividing unit extracts the header wavelength signals from among input optical signals inputted through the input ports and the add port. The header wavelength signals contain header information on data wavelength signals contained in the input optical signals. An optical signal inputting section demultiplexes optical signals having the data signals according to the wavelength, and for dividing and inputting the wavelength-based demultiplexed data wavelength signals according to a frame.Type: GrantFiled: March 3, 2004Date of Patent: November 6, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Ki-Cheol Lee, Jong-Kwon Kim, Jun-Ho Koh, Sang-Hyun Doh, Se-Kang Park
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Patent number: 7280758Abstract: An optical multi-ring network for burst data communication is disclosed. The multi-ring network includes a plurality of optical single-ring networks having a plurality of optical add/drop routers connected with each other through fiber links, and a core optical router for supporting communication between the optical single-ring networks. The core optical router includes a wavelength division demultiplexing section for demultiplexing optical signals received from the each single-ring network and outputting the demultiplexed optical signals as channels whose wavelengths are different from each other; a branching section for branching off and outputting a portion of each channel; and a switching section for switching each channel to a path directed to the destination of each channel according to a first control signal.Type: GrantFiled: June 6, 2003Date of Patent: October 9, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Sang-Hyun Doh, Se-Kang Park, Ki-Cheol Lee, Yun-Je Oh, Byung-Chang Kang
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Patent number: 7272311Abstract: Disclosed is an optical ring network for burst data communication having a plurality of core nodes connected with each other through fiber links. Each core node comprises a demultiplexer for demultiplexing a received optical signal into a plurality of channels by wavelength, an add/drop section for dropping channels selected from the plurality of channels based on a control signal, a multiplexer for multiplexing and outputting the plurality of channels inputted through the add/drop section, a branching section arranged between the demultiplexer and the add/drop section for branching off channel portions from each channel, and a controller for recognizing destinations for frames with each channel modulated and outputting the control signal for dropping the selected channels to the add/drop section.Type: GrantFiled: June 6, 2003Date of Patent: September 18, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Sang-Hyun Doh, Ki-Cheol Lee, Se-Kang Park, Yun-Je Oh
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Patent number: 7228071Abstract: Disclosed is a wavelength division multiplexing optical switching system, which is connected with a plurality of nodes of an optical network and supports communication between the nodes. The optical switching system includes a wavelength division demultiplexing unit which demultiplexes optical signals received from each of the plurality of nodes and outputs them as channels with different wavelengths. A routing unit which classifies the channels in accordance with destinations thereof. A fixed wavelength converting unit which converts the classified channels into channels of a single wavelength, the single wavelength being allocated in accordance with corresponding starting places. A wavelength division multiplexing unit which collects the wavelength-converted channels in accordance with destinations and then outputs them as multiplexed optical signals.Type: GrantFiled: May 28, 2003Date of Patent: June 5, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Se-Kang Park, Ki-Cheol Lee, Sang-Hyun Doh, Yun-Je Oh
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Patent number: 7167302Abstract: A wideband erbium-doped optical fiber amplifier is disposed among an optical fiber through which a first and second band-band optical signals (for example, the C-band and L-band) are transmitted and forms a first optical path and a second optical path parallel to each other. The wideband erbium-doped optical fiber amplifier comprising a first amplifying section disposed on the first optical path, including a first erbium-doped optical fiber to amplify the first-band optical signals, a filter to gain-flatten the amplified first-band optical signals, wherein a reflected portion of the first band optical signal by the filter is directed to the second optical path; and a second amplifying section disposed on the second optical path, having a second erbium-doped optical fiber to amplify received second-band optical signals, wherein the reflected first-band optical signal is used to pump the second erbium-doped optical fiber.Type: GrantFiled: September 29, 2003Date of Patent: January 23, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-Hun Lee, Se-Kang Park, Hak-Phil Lee, Ki-Cheol Lee, Jong-Kwon Kim, Sang-Hyun Doh, Sang-Il Lee
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Patent number: 7133609Abstract: A bidirectional WDM self-healing ring network is provided and includes an outer ring network and an inner network for processing N units of optical signals and for performing a protection switching by using the outer ring network when the inner ring network suffers a link failure.Type: GrantFiled: May 28, 2003Date of Patent: November 7, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-Kwon Kim, Sang-Hyun Doh, Yun-Je Oh, Ki-Cheol Lee, Jong-Hun Lee, Hak-Phil Lee, Se-Kang Park
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Publication number: 20060176835Abstract: A solution for allowing conditional access to IP-based broadcast services in a passive optical network is disclosed. When a subscriber requests broadcast services by selecting a broadcast channel, an IP set-top converts the request into an IGMP join message and forwards the message to an ONU/ONT, a unit on the subscriber's side. The ONU/ONT delivers the message to an OLT interworking with a router while storing mapping information of the port that received the message and a MAC address of the selected channel. Thereafter, the OLT extracts information on MAC address of the IP set-top box and the requested broadcast data. The OLT compares the extracted information to the subscriber's subscription information and determines whether to provide the requested broadcast services. If the broadcast services may be provided, the broadcast data provided from the broadcast server is transmitted to the IP set-top box via ONU/ONT based on the stored mapping information.Type: ApplicationFiled: January 26, 2006Publication date: August 10, 2006Inventors: Soon-Ho Jang, Chang-Sup Shim, Yun-Je Oh, Tae-Sung Park, Seong-Ha Kim, Se-Hong Park, Yu-Gun Kim, Dong-Il Seo, Jung-Hwan Lim, Jun-Sung An, Sung-Il Sohn, Se-Kang Park, Do-Young Joung, Su-Hyung Kim, Gil-Yong Park
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Publication number: 20050158048Abstract: A system and method for managing link status in Gigabit Ethernet passive optical network (GE-PON) units (ONUs) is disclosed. The GE-PON comprises one or more ONUs allocated data transmission periods, respectively. Each of the ONUs sends a report signal and a data signal in a corresponding one of the allocated data transmission periods. The report signal contains a signal to request allocation of a bandwidth for data signal transmission in a next window period. The GE-PON further comprises an optical splitter having its one side connected with the ONUs and its other side connected with at least one optical communication channel. The optical splitter switches an input signal to a desired destination.Type: ApplicationFiled: June 16, 2004Publication date: July 21, 2005Inventors: Whan-Jin Sung, Shin-Hee Won, Tae-Sung Park, Do-Young Joung, Se-Kang Park, Jun-Sung An, Soon-Ho Jang, Dong-Il Seo
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Publication number: 20050135803Abstract: A Gigabit Ethernet passive optical network (GE-PON) and method for accurately detecting an error of data to securely transmit the data.Type: ApplicationFiled: June 16, 2004Publication date: June 23, 2005Inventors: Hak-Phil Lee, Se-Kang Park
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Publication number: 20050047602Abstract: A Gigabit Ethernet-based passive optical network that can reliably transmit data is disclosed. The network includes an OLT for receiving a public key through a transmission medium, encrypting a secret key by means of the received public key, transmitting the encrypted secret key, encrypting data by means of the secret key, and transmitting the encrypted data, the OLT being located in a service provider-side. The network also includes an ONT for transmitting the public key to the OLT, receiving the secret key transmitted from the OLT, decrypting the secret key by means of a private key, receiving the data, and decrypting the received data by means of the decrypted the secret key. The public key is used for encrypting the secret key. The secret key is encrypted by means of the public key. The data is encrypted by the OLT by means of the secret key.Type: ApplicationFiled: January 16, 2004Publication date: March 3, 2005Inventors: Hak-Phil Lee, Se-Kang Park, Whan-Jin Sung, Young-Seok Kim, Yun-Je Oh, Jun-Sung An, Tae-Sung Park, Su-Hyung Kim
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Publication number: 20040240045Abstract: A wideband erbium-doped optical fiber amplifier is disposed among an optical fiber through which a first and second band-band optical signals (for example, the C-band and L-band) are transmitted and forms a first optical path and a second optical path parallel to each other. The wideband erbium-doped optical fiber amplifier comprising a first amplifying section disposed on the first optical path, including a first erbium-doped optical fiber to amplify the first-band optical signals, a filter to gain-flatten the amplified first-band optical signals, wherein a reflected portion of the first band optical signal by the filter is directed to the second optical path; and a second amplifying section disposed on the second optical path, having a second erbium-doped optical fiber to amplify received second-band optical signals, wherein the reflected first-band optical signal is used to pump the second erbium-doped optical fiber.Type: ApplicationFiled: September 29, 2003Publication date: December 2, 2004Inventors: Jong-Hun Lee, Se-Kang Park, Hak-Phil Lee, Ki-Cheol Lee, Jong-Kwon Kim, Sang-Hyun Doh, Sang-Il Lee
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Publication number: 20040223762Abstract: A high speed optical routing apparatus and method, in which data traffic, such as an IP packet, an Ethernet frame, etc., is switched in an optical frame unit at a high speed. The apparatus is provided with a plurality of input and output ports, and with one add port for adding data received from a lower IP router, and one drop port for dropping processed data toward the lower IP router. A header wavelength dividing unit extracts the header wavelength signals from among input optical signals inputted through the input ports and the add port. The header wavelength signals contain header information on data wavelength signals contained in the input optical signals. An optical signal inputting section demultiplexes optical signals having the data signals according to the wavelength, and for dividing and inputting the wavelength-based demultiplexed data wavelength signals according to a frame.Type: ApplicationFiled: March 3, 2004Publication date: November 11, 2004Inventors: Ki-Cheol Lee, Jong-Kwon Kim, Jun-Ho Koh, Sang-Hyun Doh, Se-Kang Park
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Publication number: 20040213572Abstract: Disclosed is an optical ring network for burst data communication having a plurality of core nodes connected with each other through fiber links. Each core node comprises a demultiplexer for demultiplexing a received optical signal into a plurality of channels by wavelength, an add/drop section for dropping channels selected from the plurality of channels based on a control signal, a multiplexer for multiplexing and outputting the plurality of channels inputted through the add/drop section, a branching section arranged between the demultiplexer and the add/drop section for branching off channel portions from each channel, and a controller for recognizing destinations for frames with each channel modulated and outputting the control signal for dropping the selected channels to the add/drop section.Type: ApplicationFiled: June 6, 2003Publication date: October 28, 2004Inventors: Sang-Hyun Doh, Ki-Cheol Lee, Se-Kang Park, Yun-Je Oh
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Publication number: 20040131354Abstract: A bidirectional WDM self-healing ring network is provided and includes an outer ring network and an inner network for processing N units of optical signals and for performing a protection switching by using the outer ring network when the inner ring network suffers a link failure.Type: ApplicationFiled: May 28, 2003Publication date: July 8, 2004Inventors: Jong-Kwon Kim, Sang-Hyun Doh, Yun-Je Oh, Ki-Cheol Lee, Jong-Hun Lee, Hak-Phil Lee, Se-Kang Park
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Publication number: 20040071160Abstract: Disclosed is a wavelength division multiplexing optical switching system, which is connected with a plurality of nodes of an optical network and supports communication between the nodes. The optical switching system includes a wavelength division demultiplexing unit which demultiplexes optical signals received from each of the plurality of nodes and outputs them as channels with different wavelengths. A routing unit which classifies the channels in accordance with destinations thereof. A fixed wavelength converting unit which converts the classified channels into channels of a single wavelength, the single wavelength being allocated in accordance with corresponding starting places. A wavelength division multiplexing unit which collects the wavelength-converted channels in accordance with destinations and then outputs them as multiplexed optical signals.Type: ApplicationFiled: May 28, 2003Publication date: April 15, 2004Inventors: Se-Kang Park, Ki-Cheol Lee, Sang-Hyun Doh, Yun-Je Oh
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Publication number: 20040071468Abstract: An optical multi-ring network for burst data communication is disclosed. The multi-ring network includes a plurality of optical single-ring networks having a plurality of optical add/drop routers connected with each other through fiber links, and a core optical router for supporting communication between the optical single-ring networks. The core optical router includes a wavelength division demultiplexing section for demultiplexing optical signals received from the each single-ring network and outputting the demultiplexed optical signals as channels whose wavelengths are different from each other; a branching section for branching off and outputting a portion of each channel; and a switching section for switching each channel to a path directed to the destination of each channel according to a first control signal.Type: ApplicationFiled: June 6, 2003Publication date: April 15, 2004Inventors: Sang-Hyun Doh, Se-Kang Park, Ki-Cheol Lee, Yun-Je Oh, Byung-Chang Kang