Abstract: Disclosed are a method and apparatus for reusing wastewater. The method for reusing wastewater disclosed herein includes: generating a mixed wastewater by mixing multiple types of wastewater (S20); performing a first purification by passing the mixed wastewater through a flocculation-sedimentation unit (S40); performing a second purification by passing an effluent of the flocculation-sedimentation unit through a membrane bioreactor (MBR) (S60); performing a third purification by passing an effluent of the MBR through a reverse-osmosis membrane unit (S80); and reusing an effluent of the reverse-osmosis membrane unit as cooling water or industrial water (S100).

Abstract: According to the present invention, content generated from a mobile terminal, a camera, or the like is stored automatically in a home gateway in a home network system. If synchronization is set between the home gateway and a home device, the home gateway may transmit backup content to the synchronized home device. Content may be selectively stored and classified based on a specific location, memo, voice, and the like set by a user for privacy protection.

Abstract: A method of connecting an Access Point (AP) is disclosed. The method includes, if a device having a nearfield wireless communication tag is tagged with a mobile terminal apparatus having a nearfield wireless communication reader, providing connecting information stored on the device to the mobile terminal apparatus, connecting the mobile terminal apparatus, receiving AP information from the connected mobile terminal apparatus, and connecting to an AP using the received AP information. As a result, connecting to the AP can be implemented more conveniently.

Abstract: A method of connecting an Access Point (AP) is disclosed. The method includes, if a device having a nearfield wireless communication tag is tagged with a mobile terminal apparatus having a nearfield wireless communication reader, providing connecting information stored on the device to the mobile terminal apparatus, connecting the mobile terminal apparatus, receiving AP information from the connected mobile terminal apparatus, and connecting to an AP using the received AP information. As a result, connecting to the AP can be implemented more conveniently.

Abstract: A method of connecting an Access Point (AP) is disclosed. The method includes, if a device having a nearfield wireless communication tag is tagged with a mobile terminal apparatus having a nearfield wireless communication reader, providing connecting information stored on the device to the mobile terminal apparatus, connecting the mobile terminal apparatus, receiving AP information from the connected mobile terminal apparatus, and connecting to an AP using the received AP information. As a result, connecting to the AP can be implemented more conveniently.

Abstract: According to the present invention, content generated from a mobile terminal, a camera, or the like is stored automatically in a home gateway in a home network system. If synchronization is set between the home gateway and a home device, the home gateway may transmit backup content to the synchronized home device. Content may be selectively stored and classified based on a specific location, memo, voice, and the like set by a user for privacy protection.

Abstract: A method of connecting an Access Point (AP) is disclosed. The method includes, if a device having a nearfield wireless communication tag is tagged with a mobile terminal apparatus having a nearfield wireless communication reader, providing connecting information stored on the device to the mobile terminal apparatus, connecting the mobile terminal apparatus, receiving AP information from the connected mobile terminal apparatus, and connecting to an AP using the received AP information. As a result, connecting to the AP can be implemented more conveniently.

Abstract: An authentication system and method in a wireless LAN (WLAN) environment. A terminal transmits an access authentication request to an access point of a WLAN which the terminal desires to access, and transmits its own transmission power information to the access point when receiving a response to the access authentication request from the access point, and the access point measures received signal strength, calculates a path loss value through the use of the received transmission power and the measured received signal strength, and performs access authentication of the terminal according to the calculated path loss value, so that a new terminal can easily access the WLAN where security has been set up.

Abstract: An apparatus and a method for adjusting a transmission rate of data, in particular a moving picture experts group 2 (MPEG-2) data is disclosed The apparatus includes a receiving buffer for buffering multi program transport stream (MPTS) packets received at various transmission rates, and a packet storage for storing MPEG-2 null packets. A signal processing section reads data buffered in the receiving buffer at a predetermined output transmission rate, wherein the signal processing section stops an operation of reading data buffered in the receiving buffer, and reads and transmits the MPEG-2 null packets stored in the packet storage when a predetermined underflow occurrence forecast situation is caused in the receiving buffer.

Abstract: An optical subscriber network system is disclosed, which comprises: a server bi-directional optical transmitter including a multiplexer to multiplexes communication data and broadcast data, a server laser diode to converts the multiplexed data into an optical signal, and a server photo diode receive communication data from a subscriber, wherein the server bi-directional optical transmitter transmits the upstream communication data; and a subscriber bi-directional optical receiver including a subscriber laser diode to transmit upstream communication data, a subscriber photo diode to receive the optical signal transmitted from the server bi-directional optical transmitter, and a demultiplexer to demultiplex and divide the multiplexed signal into communication data and broadcast data. In the optical subscriber network system, the optical transmitter and the optical receiver can transceive image signals and Ethernet communication signals in a two-way direction by means of a single laser diode and photo diode.

Abstract: An asynchronous transport stream receiver of a digital broadcasting receiving system connected to MPEG-2 (Moving Picture Experts Group-2) equipment, such as a VOD (Video On Demand) server is disclosed. The inventive receiver includes an FIFO section for storing MPEG-2 data generated from DVB-ASI (Digital Video Broadcasting Asynchronous Serial Interface) signals, an oscillator for generating clock signals for producing the MPEG-2 data from the DVB-ASI signals, and a read controller for reading and outputting the MPEG-2 data stored at the FIFO section in synchronization with clock signals of the oscillator. Accordingly, the MPEG-2 data can be processed and outputted regardless of the SD or HD leveled compression condition (bit rate) of the MPEG-2 data transmitted according to the DVB-ASI standard.

Abstract: An optical transmission network is disclosed that classifies digital broadcast channel data according to virtual channel connection (VCC) before transmission. In the optical transmission network, an optical signal receiver converts an optical signal from an optical line terminal (OLT) into an ATM cell that is classified according to the VCC. A VCC-based ATM cell classifier detects header information and a payload part from the classified ATM cell of each VCC. PID analyzers receive a payload part of an ATM cell corresponding to one VCC from the VCC-based ATM cell classifier, extract PID of each broadcast channel from digital broadcast channel data included in the payload part, and output specific broadcast channel data in the broadcast channel data included in the payload part. A switch receives broadcast channel data output from the PID analyzers and switches the received broadcast channel data to a broadcast channel desired by each subscriber.

Abstract: An apparatus and a method for adjusting a transmission rate of data, in particular a moving picture experts group 2 (MPEG-2) data. The apparatus includes a receiving buffer for buffering multi program transport stream (MPTS) packets received at various transmission rates, and a packet storage for storing MPEG-2 null packets. A signal processing section reads data buffered in the receiving buffer at a predetermined output transmission rate, wherein the signal processing section stops an operation of reading data buffered in the receiving buffer, and reads and transmits the MPEG-2 null packets stored in the packet storage when a predetermined underflow occurrence forecast situation is caused in the receiving buffer.

Abstract: A system for performing transmission and reception operations based on broadcast/communication convergence. A transmitter adapted for the broadcast/communication convergence converts input broadcast data into a parallel format, inserts port identification (Port ID) information into each of the broadcast data converted into the parallel format and input communication data, multiplexes the broadcast data and the communication data, and transmits a broadcast/communication convergence signal based on a result of the multiplexing through a single transmission channel. A receiver adapted for the broadcast/communication convergence demultiplexes the broadcast/communication convergence signal using the Port ID information to be separated into the broadcast data and the communication data when the broadcast/communication convergence signal is received, and outputs data to a corresponding destination.

Abstract: An optical subscriber network system is disclosed, which comprises: a server bi-directional optical transmitter including a multiplexer to multiplexes communication data and broadcast data, a server laser diode to converts the multiplexed data into an optical signal, and a server photo diode receive communication data from a subscriber, wherein the server bi-directional optical transmitter transmits the upstream communication data; and a subscriber bi-directional optical receiver including a subscriber laser diode to transmit upstream communication data, a subscriber photo diode to receive the optical signal transmitted from the server bi-directional optical transmitter, and a demultiplexer to demultiplex and divide the multiplexed signal into communication data and broadcast data. In the optical subscriber network system, the optical transmitter and the optical receiver can transceive image signals and Ethernet communication signals in a two-way direction by means of a single laser diode and photo diode.

Abstract: An optical transport network for providing broadcasting services is disclosed and includes: an OLT for receiving single-channel MPTSs from a plurality of broadcasting service providers, assigning VCIs to each of the single-channel MPTSs, converting into ATM cells, and continuously transmitting optical signals according to a corresponding bandwidth; an ATM cell conversion section for converting the optical signals transmitted from the OLT into an ATM format data, dividing the ATM format data into ATM cells and outputting one broadcasting channel data from each ATM cell; a switch for switching each digital broadcasting data provided from the ATM cell conversion section to each subscriber; and a control section for receiving header information in an ATM cell from the ATM cell conversion section, updating broadcasting channel information, receiving desired broadcasting channels from subscribers, and controlling the switch so that channel data outputted from the ATM cell conversion section can be corresponded to s

Abstract: A circuit for protecting a laser diode from an initial instantaneous surge current includes an upper voltage limiter for applying a predetermined voltage to a laser diode and limiting the voltage not to exceed a predetermined level and further features a low-speed voltage increaser for slowly increasing a voltage to be applied to the upper voltage limiter by a predetermined time constant. For ATC (automatic temperature control), the laser diode protection circuit may further comprise a lower voltage limiter, a low-speed voltage reducer and a second leakage current breaker.

Abstract: An asynchronous transport stream receiver of a digital broadcasting receiving system connected to MPEG-2 (Moving Picture Experts Group-2) equipment, such as a VOD (Video On Demand) server is disclosed. The inventive receiver includes an FIFO section for storing MPEG-2 data generated from DVB-ASI (Digital Video Broadcasting Asynchronous Serial Interface) signals, an oscillator for generating clock signals for producing the MPEG-2 data from the DVB-ASI signals, and a read controller for reading and outputting the MPEG-2 data stored at the FIFO section in synchronization with clock signals of the oscillator. Accordingly, the MPEG-2 data can be processed and outputted regardless of the SD or HD leveled compression condition (bit rate) of the MPEG-2 data transmitted according to the DVB-ASI standard.

Abstract: An optical transmission network is disclosed that classifies digital broadcast channel data according to virtual channel connection (VCC) before transmission. In the optical transmission network, an optical signal receiver converts an optical signal from an optical line terminal (OLT) into an ATM cell that is classified according to the VCC. A VCC-based ATM cell classifier detects header information and a payload part from the classified ATM cell of each VCC. PID analyzers receive a payload part of an ATM cell corresponding to one VCC from the VCC-based ATM cell classifier, extract PID of each broadcast channel from digital broadcast channel data included in the payload part, and output specific broadcast channel data in the broadcast channel data included in the payload part. A switch receives broadcast channel data output from the PID analyzers and switches the received broadcast channel data to a broadcast channel desired by each subscriber.