Abstract:
PURPOSE: An efficient scanning method for a wireless local area network (LAN) is provided to reduce the initial setup link time on a wireless LAN after an STA (STAtion) searches for an access point (AP). CONSTITUTION: An RSN IE (Information Element) is added to a probe request in order to inform an AP about the capability of an STA. The secure processing capability of the corresponding STA informs through a probe request frame. A new field is defined in order to accurately inform the capability and preference of the STA. The new field is called a capability filter information element. The new field is included in the probe request. [Reference numerals] (AA) Transmit AP scan intermediate result - Abort a scanning process when a suitable AP is found → Scanning premature termination is possible; (BB) Transmit a probe response to the AP selected by an inclusion list or exclusion list; (CC) Selective scanning from a channel which has a probability of the existence of the AP; (DD) AP, which does not allow association based on the capability of STA specified on a probe request, transmit a Null Response or does not send a response
Abstract:
PURPOSE: A channel allocation device and a method thereof are provided to allocate restricted frequency channel to the terminals by considering a transmission mode of the terminals. CONSTITUTION: A reception unit(1010) receives terminal information including the transmission mode information of the terminals from a plurality of terminals. A confirmation unit(1020) confirms the transmission mode of the terminals. The confirmation unit confirms a frequency band which is able to be confirmed by the terminals. An allocation unit(1030) corresponds to the transmission mode of the terminals to allocate the channel of the frequency band to the available frequency band. A transmission unit(1040) transmits channel allocation information for the channel allocated to the terminals to the terminals. [Reference numerals] (1010) Reception unit; (1020) Confirmation unit; (1030) Allocation unit; (1040) Transmission unit
Abstract:
PURPOSE: A data transmission and reception device and a method thereof are provided to normally transmit and receive data by constructing a frame in a new frequency band. CONSTITUTION: A generation unit(620) generates a data frame and a control frame in a new frequency band for transmitting and receiving data between an AP(Access Point) and a terminal. A transmission unit(630) transmits the control frame in the new frequency band. The transmission unit transmits the data frame through beam-forming. A determination unit(610) determines the repeated transmission number of the control frame. [Reference numerals] (610) Determination unit; (620) Generation unit; (630) Transmission unit
Abstract:
PURPOSE: A data frame transmission method and apparatus thereof are provided to promote the performance of wireless communication by increasing diversity gains using a time block coding method. CONSTITUTION: A processor(910) creates a data frame. The data frame includes a service filed and a data field. The data field includes VHT-SIG-B like a VHT(Very High Throughput) signal information. The processor transmits the wireless signal of the data frame through an operating channel bandwidth. The data field is scrambled by a scrambling sequence. The scrambling sequence is created based on the initial scrambling sequence and a polynomial generator. [Reference numerals] (910) Processer; (920) Memory
Abstract:
PURPOSE: A method for transmitting a multiple frame in a wireless communication system and a transmitter are provided to allow other stations to use idle sub channels by adjusting the bandwidth of a data frame while request to send-clear to send(RTS-CTS) and transmission opportunity(TXOP). CONSTITUTION: A processor(11) establishes TXOP by receiving a CTS frame with a second bandwidth in response to an RTS frame. The TXOP indicates a time with authority which allows a transmitter to transmit a data frame. The processor successively transmits data frames while the TXOP. The bandwidths of the data frames are the same as or smaller than the second bandwidth. The bandwidth of a subsequent data frame is the same as or smaller than a bandwidth of a preceding data frame.
Abstract:
본 발명은 데이터를 송수신하는 방법 및 장치에 관한 것이다. 본 발명의 일 실시예에 의한, 가변 주파수 대역을 사용하는 MIMO 시스템에서 송신 단말이 수신 단말에 데이터를 송신하는 방법은, 상기 데이터 프레임의 송신에 적용되는 주파수 대역에 따라 반복적으로 시그널 필드를 생성하는 단계, 상기 데이터를 포함하는 데이터 필드를 생성하는 단계, 상기 시그널 필드 및 상기 데이터 필드를 포함하는 데이터 프레임을 생성하는 단계 및 상기 데이터 프레임을 상기 수신 단말에 송신하는 단계를 포함한다. 본 발명에 의하면 MIMO 시스템에서 송신 단말이 수신 단말로 데이터를 전송할 때 함께 전송되는 시그널 필드를 보다 효율적으로 전송할 수 있는 효과가 있다.
Abstract:
본 발명은 저밀도 패리티 검사 부호의 고속 검사노드 갱신 장치 및 그 방법에 관한 것으로, 저밀도 패리티 검사 부호의 검사노드 갱신에 있어서, 입력 비트의 첫 번째 최소값 및 두 번째 최소값을 각 비트별로 산출하고 산출된 첫 번째 최소값 또는 두 번째 최소값을 이용하여 검사노드의 각 차수에 해당하는 최소값을 결정함으로써, 검사노드를 갱신하는 과정을 효율적으로 수행할 수 있게 하는, 저밀도 패리티 검사 부호의 고속 검사노드 갱신 장치 및 그 방법을 제공하고자 한다. 이를 위하여, 본 발명은 저밀도 패리티 검사 부호의 고속 검사노드 갱신 장치에 있어서, 입력 비트의 첫 번째 최소값을 각 비트별로 산출하고, 상기 산출된 첫 번째 최소값을 이용하여 두 번째 최소값을 함께 산출하기 위한 최소값 산출 수단; 상기 산출된 첫 번째 및 두 번째 최소값을 검사노드별로 행분해하여 노드별 첫 번째 및 두 번째 최소값을 산출하기 위한 노드 최소값 산출 수단; 및 상기 산출된 노드별 첫 번째 및 두 번째 최소값 중 어느 하나의 최소값을 상기 입력 비트의 각 차수에 해당하는 최소값으로 결정하기 위한 최소값 결정 수단을 포함한다. 입력 비트, 첫 번째 최소값, 두 번째 최소값, 검사노드 갱신, 행분해, 저밀도 패리티 검사 부호
Abstract:
PURPOSE: A device and a method for providing wlan service using multiple channel are provided to transmits received data from access point through the multi channel to a wireless terminal, thereby expanding service area of the access point. CONSTITUTION: A service request receiver(901) receives service request information from the first wireless terminal. A data receiver(903) receives data according to the service request information from the first access point. A data transmitter(905) transmits the data to the first wireless terminal of preset service area. The first wireless terminal and the first access point controls a access controller(907) to be connected respectively through different channels.
Abstract:
An apparatus and a method for updating a check node of a low density parity check code are provided to determine a minimum value corresponding to each balance of a check node by using a first minimum value and a second minimum value of an input bit. A minimum value calculating part(410) calculates a first minimum value and a second minimum value of an input bit. A node minimum value calculating part(420) calculates a first minimum value and a second minimum value about a check node R1, and a first minimum value and a second minimum value about a check node R2. The node minimum value calculating part calculates the first minimum value and the second minimum value according to the check node R1 and R2. A minimum value determining part(430) calculates a check node output value.
Abstract:
A transceiver for a wireless communication system using multiple antennas, a method thereof and a digital intermediate frequency transmission signal processing method used in the method are provided to simultaneously transmit eight streaming signals through eight or more multi antennas in an MIMO(Multi Input Multi Output) system, thereby drastically increasing a transmission rate. A baseband transmitting unit(2) performs MAC(Media Access Control) protocol processing about transmission data. The baseband transmitting unit divides the transmission data into bands during a physical layer processing process. A digital intermediate frequency transmitting unit(3) outputs channels by combining transmission signals according to each band transferred from the baseband transmitting unit.