Abstract: A parking lot management system that works in cooperation with intelligent cameras is disclosed. The system includes a plurality of intelligent cameras connected to each other via a wired/wireless mesh network, a license plate recognition unit which can recognize a license plate of a vehicle entering and exiting a parking lot, a server for storing and managing information about the vehicle, a parking information board and a vehicle information about the position terminal which provide a user with parking information, and a personal computer for controlling all information.

Abstract: In a vehicle communication environment, a handover apparatus that is located at a random vehicle determines whether to perform handover based on a received signal intensity value of a signal that is received from base stations that are installed at the roadside and information that is acquired from peripheral vehicles. In this case, it is determined whether to perform handover using a signal intensity value and a link base station value representing a base station to which each vehicle is connected among information that is acquired from peripheral vehicles.

Abstract: Provided are a method and device for determining a non-line of sight (NLOS) state around a GPS receiver. The method may include collecting, from at least one satellite, satellite information including a direction angle, a signal to noise (SNR), and an altitude, selecting a satellite of which the NLOS state is to be determined based on an altitude value of the collected satellite information, and determining whether the selected satellite is in the NLOS state with respect to a direction to the satellite based on the SNR and direction angle included in the satellite information of the selected satellite. According to the present invention, by reducing a location calculation error that occurs due to a distance measurement error when a location is measured, a more precise result of location measurement can be obtained.

Abstract: Provided is a multi-route routing scheme that supports Quality of Service (QoS) in the wireless mesh network. A method of notifying about and avoiding congestion situation in data transmission in a wireless mesh network and a mesh node may also be provided. Data may be differentially transmitted to multiple routes by obtaining a route congestion level existing in a current multi-hop route and thus, data providing a real-time service, such as a video streaming service, may avoid congested routes and may be promptly transmitted. Multiple queues in a mesh node may be divided into divided queues based on a congestion situation of a transmission route in a network and the divided queues may be transmitted through multiple routes and thus, an efficiency of the overall network may increase.

Abstract: Provided are an apparatus and method for transmitting data using a multi-antenna. The apparatus includes a transmission buffer selecting unit for selecting transmission buffer of an antenna group corresponding to characteristics of each aggregated Medium access control Protocol Data Units (MPDU) when a list of aggregated MPDUs to transmit is received; a data transmitting unit for generating a list of aggregated MPDUs to transmit with storage information of the aggregated MPDUs, transferring the generated list to the transmission buffer selecting unit and transmitting corresponding aggregated MPDUs through the selected transmission buffer; and a timing controlling unit for controlling a transmission timing of each aggregated MPDU.

Abstract: A parking lot management system that works in cooperation with intelligent cameras is disclosed. The system includes a plurality of intelligent cameras connected to each other via a wired/wireless mesh network, a license plate recognition unit which can recognize a license plate of a vehicle entering and exiting a parking lot, a server for storing and managing information about the vehicle, a parking information board and a vehicle information about the position terminal which provide a user with parking information, and a personal computer for controlling all information.

Abstract: Provided are a transmitter and receiver for a high throughput wireless communication system using a multiple antenna, a method thereof, and a digital intermediate frequency (DIF) transmission signal processing method for the same. The transmitter, includes: a baseband transmitting unit for processing a transmission signal by performing a Media Access Control (MAC) protocol process on transmission data and dividing the transmission data into n band signals where n is a predetermined natural number in a physical layer process; a DIF transmitting unit for integrating transmission signals of each band transmitted from the baseband transmitting unit and outputting m channels where m is a predetermined natural number; and a Radio Frequency (RF) transmitting unit for modulating each channel signal transmitted from the DIF transmitting unit into an RF signal and emitting the signal through the multiple antenna.

Abstract: Provided are an apparatus and method for providing a WLAN service using multiple channels. The wireless local area network (WLAN) service apparatus includes a service request receiver configured to receive service request information from a first wireless terminal accessed through a first channel, a data receiver configured to receive data from a first access point accessed through a second channel according to the service request information, a data transmitter configured to transmit the data to the first wireless terminal in a predetermined service area, and an access controller configured to control the first wireless terminal and the first access point to be accessed through different channels.

Abstract: Provided are an apparatus and method for processing an ARQ in a MIMO system. The apparatus includes a storing unit for storing reordering thresholds of each receiving terminal and retransmission data; a priority managing unit for assigning a priority to a plurality of antenna groups in ascending order of a bit error rate of a wireless channel of each antenna group and managing the plurality of antenna groups based on the priorities; a data transmitting unit for transmitting retransmission data; and a controlling unit for controlling the data transmitting unit to transmit retransmission data within a range not exceeding a reordering threshold of a corresponding receiving terminal sequentially using an antenna group having the highest priority first.

Abstract: Provided are a MAC method and a method for transmitting data using the same in a WLAN. The MAC method includes: transmitting a bandwidth scheduling report frame for informing information on downlinks and uplinks allocated to a terminal by including the bandwidth scheduling report frame in one of the downlinks where the bandwidth scheduling report frame includes a plurality of downlinks, a plurality of uplinks, and a plurality of short uplinks and the number of the plurality of downlinks is equal to the number of the plurality of uplinks; receiving a bandwidth request frame for requesting bandwidth allocation through one of the uplinks; and allocating a bandwidth to each of the terminals by an unit of the downlink and the uplink.

Abstract: A surveillance system includes a sensor node, a master sensor node and a server. The sensor node firstly determines whether an event occurs based on self-event information and supplementary event information received from the plurality of sensors. The master sensor node receives the occurrence of the event from the sensor node, and secondly determines whether the event occurred based on the self-event information and the supplementary event information. The server receives whether the event occurs from the master sensor node. The occurrence of the event can be autonomously detected and determined among the sensor node, the master sensor node, and the server.

Abstract: An apparatus for providing driving information for a vehicle based on high speed movement long distance impulse radio-ultra wideband (IR-UWB) is provided. The apparatus includes an IR-UWB module configured to generate a packet based on high speed movement long distance IR-UWB, transmit the generated packet, and interpret a received packet and a controller operationally coupled to the IR-UWB module. The controller is configured for the step of estimating a distance between an own vehicle and a different vehicle, estimating a relative location of the own vehicle with respect to the different vehicle based on the distance and generating driving information including the distance and the relative location.

Abstract: Provided is a multi-route routing scheme that supports Quality of Service (QoS) in the wireless mesh network. A method of notifying about and avoiding congestion situation in data transmission in a wireless mesh network and a mesh node may also be provided. Data may be differentially transmitted to multiple routes by obtaining a route congestion level existing in a current multi-hop route and thus, data providing a real-time service, such as a video streaming service, may avoid congested routes and may be promptly transmitted. Multiple queues in a mesh node may be divided into divided queues based on a congestion situation of a transmission route in a network and the divided queues may be transmitted through multiple routes and thus, an efficiency of the overall network may increase.

Abstract: Disclosed is a method and system for allocating resources in a communication system. The method includes calculating a size of a transmission area for transmitting the generated data when data to be transmitted to mobile stations is generated; and controlling data to be transmitted through the transmission area and then allocating the controlled data to the transmission area according to priorities of data bursts based on sizes of the data bursts.

Abstract: Provided are an apparatus and method for processing an ARQ in a MIMO system. The apparatus includes a storing unit for storing reordering thresholds of each receiving terminal and retransmission data; a priority managing unit for assigning a priority to a plurality of antenna groups in ascending order of a bit error rate of a wireless channel of each antenna group and managing the plurality of antenna groups based on the priorities; a data transmitting unit for transmitting retransmission data; and a controlling unit for controlling the data transmitting unit to transmit retransmission data within a range not exceeding a reordering threshold of a corresponding receiving terminal sequentially using an antenna group having the highest priority first.

Abstract: An apparatus for allocating resources in a wireless communication system includes: a verification unit configured to receive channel information and base station information of a system, verify from the channel information the number of channels capable of being used in the system and bandwidths of the channels, and verify from the base station information the number of base stations and bandwidths of channels requested by the base stations to be allocated; an allocation unit configured to allocate at least one channel of the channels capable of being used to each base station in response to verification by the verification unit; and a generation unit configured to generate allocation information corresponding to channel allocation by the allocation unit and transmit the allocation information to the base stations.

Abstract: A data transmission method includes: deciding the priority of data; deciding a channel priority based on a channel state; selecting a modulation and coding scheme (MCS) for the data based on the priority of data; selecting a transmission channel through which the data is to be transmitted, based on the channel priority; and modulating and coding the data in accordance with the selected MCS, and transmitting the modulated and coded data through the selected transmission channel.

Abstract: An apparatus for transmitting in a wireless communication system includes: a frame generating unit configured to generate a frame based on user data and to transmit the frame and frame information; a scheduling unit configured to generate a schedule of the frames to be transmitted on a frame-by-frame basis based on the frame information and to transmit the schedule; and a data matching unit configured to match the frames based on the schedule so as to transmit the frames at a time.

Abstract: Provided are an apparatus and method for providing a WLAN service using multiple channels. The wireless local area network (WLAN) service apparatus includes a service request receiver configured to receive service request information from a first wireless terminal accessed through a first channel, a data receiver configured to receive data from a first access point accessed through a second channel according to the service request information, a data transmitter configured to transmit the data to the first wireless terminal in a predetermined service area, and an access controller configured to control the first wireless terminal and the first access point to be accessed through different channels.

Abstract: An apparatus and method for updating a check node of a low-density parity check (LDPC) code in order to decode the LDPC code are provided. The method includes the operations of: (a) obtaining a first bit of a first minimum value among input values, the number of input values being equal to the number of degrees of the check node, by performing an AND operation on first bits of the input values, the first bits being most significant bits of the input values; (b) obtaining result values by switching and sequentially performing an XOR operation and an OR operation on the first bit of the first minimum value and each of the first bits of the input values; and (c) performing operations (a) and (b) on the result values set as input values and performing operations (a) and (b) a number of times corresponding to the number of bits of each input value, that is, repeating until last bits are set as input values, to thereby obtain the first minimum value, the last bits being least significant bits of the input values.