Patents by Inventor Il Soon Jang
Il Soon Jang 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: 8391720Abstract: There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed.Type: GrantFiled: July 29, 2010Date of Patent: March 5, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Il-Soon Jang, Dae-Ho Kim, Sang-Kyu Lim, Tae-Gyu Kang
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Publication number: 20130004183Abstract: There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed.Type: ApplicationFiled: September 11, 2012Publication date: January 3, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Il-Soon JANG, Dae-Ho KIM, Sang-Kyu LIM, Tae-Gyu KANG
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Publication number: 20130004182Abstract: Disclosed herein are a visible light communication method and apparatus. The visible light communication method includes determining a dimming level variable to perform minute dimming control, selecting an upper dimming symbol and a lower dimming symbol, which belong to Variable Pulse Position Modulation (VPPM) symbols, based on the dimming level variable, determining at least one of the number of upper dimming symbols to be sent and the number of lower dimming symbols to be sent based on the dimming level variable, and generating a transmission sequence corresponding to the dimming level variable by combining the upper dimming symbols and the lower dimming symbols based on the number of symbols to be sent.Type: ApplicationFiled: March 22, 2012Publication date: January 3, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Dae-Ho KIM, Tae-Gyu KANG, Sang-Kyu LIM, Il-Soon JANG, You-Jin KIM
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Publication number: 20130004184Abstract: There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed.Type: ApplicationFiled: September 11, 2012Publication date: January 3, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Il-Soon JANG, Dae-Ho KIM, Sang-Kyu LIM, Tae-Gyu KANG
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Publication number: 20120157159Abstract: A communication apparatus using an image sensor captures an image including a light signal transmitted from a transmission apparatus that includes a transmission light source, and obtains data from the captured image. In a case that a reception error rate generated by the obtained data is changed, a cause of the change of the error rate is measured, and at least one of a zooming operation and a focusing operation is performed depending on the measured result, thereby correcting the error.Type: ApplicationFiled: December 15, 2011Publication date: June 21, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Il-Soon JANG, Dae Ho Kim, Sang-Kyu Lim, You Jin Kim, Tae-Gyu Kang
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Publication number: 20120155889Abstract: A transmitting apparatus using visible light communication generates transmission data into a two-dimensional data code according to a predetermined code method between the transmitting apparatus and a receiving apparatus and transmits the two-dimensional data code through a plurality of light emitting diodes (LED) that are arranged in a two-dimensional form. Therefore, the receiving apparatus senses light from a plurality of LEDs as an image using an image sensor, demodulates the image into a two-dimensional data code, decodes the two-dimensional data code using a code book, and restores data.Type: ApplicationFiled: December 12, 2011Publication date: June 21, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: You Jin KIM, Tae-Gyu KANG, Sang-Kyu LIM, Dae Ho KIM, Il-Soon JANG
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Publication number: 20120154824Abstract: A position measuring apparatus receives at least one precise position information set from at least one visible-light wireless communication device including a transmission light source, and upon receipt of the at least one precise position information ser, acquires a virtual distance based on the positions of transmission light sources imaged on an image sensor. Next, the position is measured according to the precise position information and the actual distance, virtual distance, and image sensor inclination based on this information.Type: ApplicationFiled: December 2, 2011Publication date: June 21, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Dae Ho KIM, Tae-Gyu Kang, Sang-Kyu Lim, Il-Soon Jang, You Jin Kim
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Publication number: 20120087676Abstract: An apparatus for transmitting data for visible light communication sets up the pulse width control step of pulse width modulation (PWM) in a unit time interval, modulates each symbol of VLC source data input into a PWM signal in accordance with the pulse width control step, generates a visible light modulation signal by controlling the turn-on time or turn-off time of a plurality of light emitting diodes (LEDs) in response to the PWM signal, and transmits the visible light modulation signal.Type: ApplicationFiled: October 7, 2011Publication date: April 12, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sang-Kyu Lim, Il-Soon Jang, Dae Ho Kim, Yon Jin Kim, Tae-Gyu Kang
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Publication number: 20120087677Abstract: A transmitting apparatus using visible light communication generates a light source control signal from color information representing additional information and transmits additional information with a color of light that is emitted by a light source by controlling an on/off time of a plurality of LEDs according to the light source control signal. Therefore, a user can intuitively know additional information from a color of light that is emitted by the light source.Type: ApplicationFiled: October 7, 2011Publication date: April 12, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Il-Soon JANG, Dae Ho KIM, Sang-Kyu LIM, You Jin KIM, Tae-Gyu KANG
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Publication number: 20110069965Abstract: A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication.Type: ApplicationFiled: September 16, 2010Publication date: March 24, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Dae-Ho KIM, Sang-Kyu Lim, Il-Soon Jang, Tae-Gyu Kang
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Publication number: 20110033181Abstract: There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment state, a communication state, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source from among a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication state or transmission speed.Type: ApplicationFiled: July 29, 2010Publication date: February 10, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Il-Soon Jang, Dae-Ho Kim, Sang-Kyu Lim, Tae-Gyu Kang
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Patent number: 7881298Abstract: Provided is a method of segmenting a packet using a tree structure in order to reduce headers in the packet when the packet is transmitted or received in a wireless communication system using an adaptive modulation and coding (AMC), and a method of transmitting/receiving a packet using the same. The method includes the steps of: determining whether a transmitting processing data unit (PDU) is a retransmitted PDU; determining whether a size of the retransmitted PDU is a transmittable size allowed by a corresponding adaptive modulation and coding (AMC) option if the transmitting PDU is the retransmitted PDU; and segmenting the retransmitting PDU, inserting a header and a sub header with identification information for reassembling into each of the segmented PDUs and transmitting the segmented PDUs.Type: GrantFiled: July 26, 2005Date of Patent: February 1, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Il-Soon Jang, Byung-Han Ryu
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Publication number: 20100136987Abstract: The present invention relates to a wireless communication system having protocol architecture for reducing latency of a cellular system. In the protocol architecture of the wireless communication system in the cellular system, a physical layer supports wireless transmission of the cellular system and estimates a radio channel condition. A data link layer determines a data transmission mode based on a QoS of user data and the radio channel condition estimated by the physical layer and performs segmentation and assembly of the packet data, and a network layer establishes and releases a radio bearer for transmitting packet data transmitted from the data link layer and a control command. A control service access point is provided for control information transmission between the data link layer and the physical layer.Type: ApplicationFiled: June 15, 2006Publication date: June 3, 2010Applicant: Electronics and Telecommunications Research InstituteInventors: Kang-Hee Kim, Soo-Jung Jung, Geon-Min Yeo, Soon-Yong Lim, Kyung-Seok Lee, Jae-Heung Kim, Il-Soon Jang, Hyun-Hwa Seo, Jung-Im Kim, Mu-Yong Shin, Byung-Han Ryu
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Publication number: 20100136910Abstract: Provided are a device searching method of a Bluetooth application and an apparatus using the same. The apparatus includes an application unit that generates a command for searching a Bluetooth device in a surrounding area of the device searching apparatus, a stack unit that performs a Bluetooth device initialization process and processes the command generated in the application unit, a first module unit that searches first Bluetooth devices in the surrounding area of the device searching apparatus, and a second module unit that searches second Bluetooth devices in the surrounding area of the device searching apparatus.Type: ApplicationFiled: December 1, 2009Publication date: June 3, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Seong-hee LEE, Il-Soon JANG, Sangsung CHOI, Seong Hee PARK
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Patent number: 7624214Abstract: A resource allocation method for performing resource competition between protocols based on a protocol in a home network environment using multiple protocols is provided. In the resource allocation method, a request of using a resource is received from an external device. An AIFS value is allocated according to a data type of the resource requested from the device. Then, the resource is not provided to the device for an AIFS period. After passing the period of the AIFS value, a back-off timer period is entered. In the back-off timer period, an application protocol of the external device requesting the resource is identified, and an idle time value is allocated according to a type of the identified protocol. Then, a corresponding resource is provided to the first device coming out of the allocated idle time.Type: GrantFiled: September 26, 2007Date of Patent: November 24, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Seong Hee Lee, Seong Hee Park, Il Soon Jang, Sang Sung Choi
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Publication number: 20090213800Abstract: A terminal state controlling method and apparatus are provided. The terminal state includes a connected state and an idle state, and the connected state includes an active state and a dormant state. The active state includes a scheduling-ON state and a scheduling-OFF state. In the state controlling apparatus, a radio resource control (RRC) layer controls a transition between the active state and the dormant state, and a media access control (MAC) layer controls a transition between the scheduling-ON state and the scheduling-OFF state.Type: ApplicationFiled: June 15, 2006Publication date: August 27, 2009Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITInventors: Kyung-Seok Lee, Soo-Jung Jung, Byung-Han Ryu, Kang-Hee Kim, Jung-Im Kim, Hyun-Hwa Seo, Mu-Yong Shin, Geon-Min Yeo, Soon-Yong Lim, Jae-Heung Kim, Il-Soon Jang
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Publication number: 20090154433Abstract: An apparatus and method for local area communication between Bluetooth and MBOA-MAC devices is provided. A new Bluetooth Protocol Adaptation Layer (PAL) is implemented to adapt a Bluetooth host module and an MBOA-MAC to each other so as to enable use of conventional legacy Bluetooth applications in a wireless network environment employing a WiMedia Multiband OFDM Alliance (MBOA)-based Media Access Control (MAC) layer. This allows devices equipped with a conventional Bluetooth host module to perform high-speed data communication based on MBOA-MAC, thereby increasing the efficiency of utilization of networks.Type: ApplicationFiled: July 22, 2008Publication date: June 18, 2009Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Il-Soon JANG, Seong-hee Lee, Seong Hee Park, Sangsung Choi
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Publication number: 20080098150Abstract: Provided is a method for forming a route map in a wireless 1394 bridge network. The method for forming a route map in a wireless 1394 bridge network, including the steps of: a) storing route map information; b) collecting changed bus information when a new network is formed according to addition/removal of a bridge; c) checking whether a quantity of the collected bus information exceeds a threshold; d) forming a route map having all bus information when the quantity of the collected bus information exceeds a threshold; and e) forming a route map having changed bus information when collected bus information does not exceed the threshold.Type: ApplicationFiled: October 23, 2007Publication date: April 24, 2008Inventors: Il-Soon JANG, Seong-Hee PARK, Seong-Hee LEE, Sang-Sung CHOI
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Publication number: 20080082709Abstract: A resource allocation method for performing resource competition between protocols based on a protocol in a home network environment using multiple protocols is provided. In the resource allocation method, a request of using a resource is received from an external device. An AIFS value is allocated according to a data type of the resource requested from the device. Then, the resource is not provided to the device for an AIFS period. After passing the period of the AIFS value, a back-off timer period is entered. In the back-off timer period, an application protocol of the external device requesting the resource is identified, and an idle time value is allocated according to a type of the identified protocol. Then, a corresponding resource is provided to the first device coming out of the allocated idle time.Type: ApplicationFiled: September 26, 2007Publication date: April 3, 2008Inventors: Seong Hee LEE, Seong Hee PARK, Il Soon JANG, Sang Sung CHOI
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Publication number: 20080037547Abstract: Provided is a method of segmenting a packet using a tree structure in order to reduce headers in the packet when the packet is transmitted or received in a wireless communication system using an adaptive modulation and coding (AMC), and a method of transmitting/receiving a packet using the same. The method includes the steps of: determining whether a transmitting processing data unit (PDU) is a retransmitted PDU; determining whether a size of the retransmitted PDU is a transmittable size allowed by a corresponding adaptive modulation and coding (AMC) option if the transmitting PDU is the retransmitted PDU; and segmenting the retransmitting PDU, inserting a header and a sub header with identification information for reassembling into each of the segmented PDUs and transmitting the segmented PDUs.Type: ApplicationFiled: July 26, 2005Publication date: February 14, 2008Applicant: Electronics and Telecommunications Research InstituteInventor: Il-Soon Jang