Abstract:
The present invention relates to a system and method for providing Multicast and Broadcast Service (MCBCS). According to the present invention, the MCBCS system and method supports session start and data path registration procedures, join and leave procedure for providing the MCBCS with static or dynamic multicast service schemes, and supports procedures for providing to mobile stations operating in idle mode. Accordingly, the present invention enables effectively implementing the MCBCS in a wireless communication system, particularly in WiMAX system, and provides the MCBCS according to the mobile stations operating in idle mode.
Abstract:
A method of forming a polycrystalline silicon layer and an atomic layer deposition apparatus used for the same. The method includes forming an amorphous silicon layer on a substrate, exposing the substrate having the amorphous silicon layer to a hydrophilic or hydrophobic gas atmosphere, placing a mask having at least one open and at least one closed portion over the amorphous silicon layer, irradiating UV light toward the amorphous silicon layer and the mask using a UV lamp, depositing a crystallization-inducing metal on the amorphous silicon layer, and annealing the substrate to crystallize the amorphous silicon layer into a polycrystalline silicon layer. This method and apparatus provide for controlling the seed position and grain size in the formation of a polycrystalline silicon layer.
Abstract:
A method and apparatus are provided for recognizing characters in a portable terminal with a scan module. Scanned image data is generated by the scan module by scanning a scan target through a scanning-light input/output panel provided on an external surface of the portable terminal as the portable terminal moves across the scan target. Part of the scanned image data is deleted when a current moving speed of the portable terminal is less than a lower limit of an optimal scan speed range, and character recognition is performed on remaining scanned image data. Image data most similar to the scanned image data is detected from a previously stored correction image database when the current moving speed is greater than an upper limit of the optimal scan speed range, and characters corresponding to the detected image data are output as character recognition results.
Abstract:
A mobile terminal and controlling method may be provided by which a specific one of various external devices neighboring a mobile terminal may be easily searched and may be connected to the mobile terminal by short-range communication.
Abstract:
Provided is a switched beam-forming apparatus which includes a beam-forming unit forming a plurality of beams using an array antenna, a beam selection adjusting unit measuring Quality of Service (QoS) values of each of a plurality of signals received through the plurality of beams, a beam selecting unit selecting at least two beams with high QoS from among the plurality of beams according to the results of the QoS measuring, and a beam combining unit combining the at least two beams selected by the beam selecting unit.
Abstract:
A header-compression packet processing method in a wireless communication system is disclosed, which can transmit a header-compression packet through a packet transmission path mapped to a service flow, the method comprising, when a service flow of a downlink packet is mapped to a header-compression transmission channel, obtaining a second packet by adding a header-compression context ID mapped to an IP flow of the downlink packet to a first packet made by compressing a header of the downlink packet, in a control station; adding a data path tag mapped to the service flow of the downlink packet to the second packet; and transmitting the second packet with the data path tag to a base station maintaining mapping information of a connection ID for a corresponding mobile station and the data path tag, so as to transmit the second packet with the data path tag to the corresponding mobile station using the header-compression transmission channel.
Abstract:
An RFID reader control system and method is provided. A protocol for controlling an RFID reader and an RFID reader control unit of a mobile phone is defined. Messages, information, commands, responses, and notification are constructed and transmitted between the RFID reader and the RFID reader control unit.
Abstract:
A pulse width modulator includes a discrete time oscillator, a data storage device, a data processing block, a counter, and a comparator. The discrete time oscillator generates a first address of bits used by the data processing block for reading first data from the data storage device. The data processing block generates second data from the first data and at least one bit of the first address bits. The comparator generates a pulse width modulation signal by comparing the second data and a digital count generated by the counter.
Abstract:
An RFID reader control system and method is provided. A protocol for controlling an RFID reader and an RFID reader control unit of a mobile phone is defined. Messages, information, commands, responses, and notification are constructed and transmitted between the RFID reader and the RFID reader control unit.
Abstract:
An RFID reader control system and method is provided. A protocol for controlling an RFID reader and an RFID reader control unit of a mobile phone is defined. Messages, information, commands, responses, and notification are constructed and transmitted between the RFID reader and the RFID reader control unit.