Abstract: A wireless communication system includes a queue status detection unit for detecting the amount of unit data being used for communication between a plurality of external devices, and deciding a class parameter T of one of the external devices; a counter for counting the number of giving-away times of the external device based on the giving-away of communication opportunities to communicate with the plurality of external devices, and deciding a delay parameter D of an external device; a communication priority decision unit for calculating priority values P of an external device by using a class parameter and a delay parameter, and determining an external device having a priority out of the plurality of external devices based on the priority values; and a communication initiation unit for initiating data communications with the determined external device having the priority. Accordingly, a communication method considering both throughput and fairness can be obtained.

Abstract: Disclosed is a handoff processing method capable of restarting fast communications. The handoff processing method stores in a handoff buffer Host Control Interface (HCI) data and transmission data upon communications in a state where an Access Point is interlinked with an external device. Further, the method forwards the HCI data and the transmission data buffered in the handoff buffer to a new Access Point (AP) transmitting a message indicating setup completion of a connection if the message indicating setup completion of a connection with the external device is transmitted from the new AP after a handoff occurs as the external device moves. Accordingly, throughputs are not lowered despite handoff occurrences in poor wireless channel environments, so that service quality can be enhanced.

Abstract: Disclosed are an electronic settlement system, an electronic settlement method, and a cash payment method using a LCD barcode displayed on a mobile terminal, thereby simply performing member identification using the LCD barcode including member information, electronic settlement services (such as credit card settlement, direct payment card settlement, advance payment card settlement, small amount settlement, and Giro system settlement) at various shops via a procedure verifying whether a user is an actual owner of the barcode, cash payment services via member information barcode and member identification procedures, advance payment card services by depositing a designated amount of money at a database of the bank and allowing the user to systematically use the advance card within the deposited money, and wirelss banking services for transmitting and receiving various banking related data via wireless network between the bank and the members.

Abstract: Disclosed is a wireless communication system capable of minimizing the hand-off throughput for wireless communication systems. The wireless communication system according to the present invention includes a first communication device for carrying out an inquiry and paging with respect to a wireless communication device located within a communication allowance range, and starting a connection with the wireless communication device; and a second communication device for receiving and transmitting data with the wireless communication device when the wireless communication device connected with the first communication device is cut off by a hard hand-off.

Abstract: A wireless communication system has a queue information search unit for searching a queue-status information provided in a packet unit, a communication priority decision unit for deciding communication priority of external devices based on the queue-status information, giving a higher priority to the external device having a greater number of packets in queues, a communication initiation unit for initiating a communication with the external devices according to the communication priority, a counter for counting the number of times that the communication is initiated for each of the external devices, and a comparator for comparing a counter value of a first external device that corresponds to a transmitted data with a counter value of a second external device that has a maximum counter value. Accordingly, when the wireless communication device transmits and receives data with respect to the plural wireless communication devices, both high throughput and high fairness can be guaranteed.

Abstract: A customer management system and method using an LCD barcode displayed on a mobile terminal. The present invention is simply and conveniently identifies customers using commodity barcodes being widely used and customer information barcodes on cellular phones, realizing effective marketing at minimum cost according to the purchase propensities or preferences of the customers for commodities and rapidly provides the customers with a variety of commodity information and a variety of benefits based on the results of their barcode use at any place, thereby effectively managing the customers integratedly.

Abstract: The present invention relates to a customer management system and method using LCD barcode displayed on mobile terminal. The present invention is capable of simply and conveniently identifying customers using commodity barcodes being widely used and customer information barcodes on cellular phones, realizing effective marketing at minimum cost according to the purchase propensities or preferences of the customers for commodities and rapidly providing the customers with a variety of commodity information and a variety of benefits based on the results of their barcode use at any place, thereby effectively managing the customers integratedly.

Abstract: The present invention relates to a customer management system and method using LCD barcode displayed on mobile terminal. The present invention is capable of simply and conveniently identifying customers using commodity barcodes being widely used and customer information barcodes on cellular phones, realizing effective marketing at minimum cost according to the purchase propensities or preferences of the customers for commodities and rapidly providing the customers with a variety of commodity information and a variety of benefits based on the results of their barcode use at any place, thereby effectively managing the customers integratedly.

Abstract: A cross-connection apparatus for tributary unit-12 signal included in a synchronous transfer module-N signal used as a connection signal between synchronous digital hierarchy network nodes, is provided, including, an input/output and tributary unit time switching means for receiving a signal structured in the form of a frame (HEBUS) made up with an administration unit 3 signal, identifier byte and bit interleaved parity byte, performing an administration unit 3 pointer processing, virtual container 3 path overhead processing and tributary unit-12 pointer processing in order to be connected to the switching network, and thus performing a tributary unit-12 unit switching function; and a space switching means for receiving a frame (LBUS) made up with the tributary unit-12 signal, identifier byte and bit interleaved parity byte, namely, an LBUS signal, from the input/output and tributary unit time switching means, the means performing and outputting a space switching operation with the signal.

Abstract: The present invention relates to a circuit for searching a fault location in a device having a number of ASIC's, including a first BIP(Bit Interleaved Parity) generating unit, which is coupled to the input stage of the ASIC where a fault will be detected, for calculating and outputting BIP for the specific byte, which is one of overhead bytes that were already utilized, i.e.