Patent application number | Description | Published |
20120099664 | METHOD OF MULTIPLE FRAME TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM AND TRANSMITTER - A method for multiple frame transmission in a wireless communication system and a transmitter are provided. The transmitter transmits a request to send (RTS) frame to a receiver. The RTS frame has a first bandwidth. The transmitter receives a clear to send (CTS) frame as a response of the RTS frame from the receiver to establish a transmission opportunity (TXOP) indicating an interval of time when the transmitter has the right to transmit at least one data frame. The CTS frame has a second bandwidth. The transmitter transmits a plurality of data frames sequentially to the receiver during the TXOP. | 04-26-2012 |
20120106575 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - Disclosed is an apparatus and method for transmitting/receiving data using a low-density parity check (LDPC) coding scheme in a communication system. The method includes generating a multi-user data packet containing data to be transmitted to a plurality of users, encoding the multi-user data packet as a BCC and an LDPC code, and transmitting the encoded multi-user data packet to the plurality of users. In the method, the encoding of the multi-user data packet encodes MPDU subframes corresponding to each of the plurality of users in the multi-user data packet as the LDPC code, and calculates information on a length in LDPC encoding, corresponding to the encoding of the multi-user data packet as the LDPC code. | 05-03-2012 |
20120314801 | TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver. | 12-13-2012 |
20120314802 | TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: encoding an information bit and generating a block coded with an NCBPSS bit; generating two sub-blocks by parsing the coded block; and transmitting the two sub-blocks to the transmitter. By preventing the bits that are contiguous to the encoding block from having continuous identical reliabilities on a signal constellation, the deterioration of the decoding performance of the transmitter can be prevented. | 12-13-2012 |
20130136075 | Apparatus and method for transmitting/receiving data in communication system - A data transmission apparatus in a communication system includes a verification unit configured to verify a basic frequency band capable of being used for transmitting and receiving data to and from a plurality of terminals, and a multi-bandwidth mode in the basic frequency band; a generation unit configured to generate data packets in the multi-bandwidth mode; and a transmission unit configured to transmit the data packets in the multi-bandwidth mode, wherein the multi-bandwidth mode includes a ½× bandwidth of the basic frequency band, a basic bandwidth, a 2× bandwidth of the basic frequency band, a 4× bandwidth of the basic frequency band and an 8× bandwidth of the basic frequency band. | 05-30-2013 |
20130136097 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - A data transmission apparatus in a communication system includes a reception unit configured to receive adjacent terminal information from a plurality of terminals through a new frequency band for transmission and reception of data between the terminals and one AP (access point); a verification unit configured to identify positions of the terminals within a service coverage of the AP through the adjacent terminal information, group the terminals into terminal groups through position-based grouping, and verify transmission possible times to the AP, in terminals included in the terminal groups; and a transmission unit configured to transmit the transmission possible times to the terminals included in the terminal groups through beacon frames in the AP, wherein, as the transmission possible times for the terminal groups, different time intervals are allocated in a beacon interval of the beacon frames. | 05-30-2013 |
20130136207 | TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: encoding an information bit and generating a block coded with an NCBPSS bit; generating two sub-blocks by parsing the coded block; and transmitting the two sub-blocks to the transmitter. By preventing the bits that are contiguous to the encoding block from having continuous identical reliabilities on a signal constellation, the deterioration of the decoding performance of the transmitter can be prevented. | 05-30-2013 |
20130159458 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - A data transmission apparatus in a communication system includes a reception unit configured to receive terminal information from a plurality of terminals through a new frequency band for transmitting and receiving data between the plurality of terminals and one AP (access point); a verification unit configured to verify the terminal information, group the terminals into terminal groups by using the terminal information, and verify virtual APs which respectively correspond to the terminal groups, in the AP; and a transmission unit configured to transmit beacon frames in the virtual APs, to the terminals included in the terminal groups, wherein the beacon frames include beacon interval information, beacon duration information, beacon offset information, and terminal group information. | 06-20-2013 |
20130176986 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - A data transmission apparatus in a communication system includes a reception unit configured to receive terminal information from a plurality of terminals through a new frequency band for transmission and reception of data between the plurality of terminals and an AP (access point); a determination unit configured to determine access timing of the terminals to the AP by using the terminal information, and generate terminal access information including information on the access timing; and a transmission unit configured to transmit the terminal access information and beacon frames to the terminals, wherein the terminals access the AP and transmit data frames to the AP, at the access timing based on the beacon frames. | 07-11-2013 |
20130177096 | METHOD AND APPARATUS FOR TRANSCEIVING DATA IN A MIMO SYSTEM - The present invention relates to a method and apparatus for transceiving data. A method in which a transmitting terminal transmits data to a receiving terminal in a MIMO system according to one embodiment of the present invention comprises the following steps: generating a data field containing the data; generating a signal field containing information on the data field; generating a data frame containing the data field and the signal field; and transmitting the data frame to the receiving terminal. According to the present invention, an end of the frame being transmitted is accurately notified to the receiving terminal in a communication system in which the frame is transmitted using MIMO, thereby decoding the frame in a more efficient manner at the receiving terminal. | 07-11-2013 |
20130188506 | APPARATUS AND METHOD FOR ALLOCATING CHANNEL IN COMMUNICATION SYSTEM - A channel allocation apparatus in a communication system includes: a measuring unit configured to measure clear channel assessments (CCA) of a plurality of stations (STAs) included in the communication system; a checking unit configured to compare the measured CCAs to preset reference CCA, and check fairness and unfairness in the STAs; and an allocating unit configured to change and allocate channels allocated to STAs corresponding to unfairness, according to the measured CCA and the reference CCA. | 07-25-2013 |
20130188571 | APPARATUS AND METHOD FOR ALLOCATING CHANNEL IN COMMUNICATION SYSTEM - A channel allocation apparatus in a communication system includes: a receiving unit configured to receive terminal information containing transmission mode information of a plurality of stations (STAs) from the STAs; a checking unit configured to check transmission modes of the STAs and check a frequency band available for the STAs; an allocating unit configured to allocate channels of an allocable frequency band in the available frequency band to the STAs, according to the transmission modes of the STAs; and a transmitting unit configured to transmit channel allocation information on the channels allocated to the STAs to the STAs. | 07-25-2013 |
20130188572 | APPARATUS AND METHOD FOR ALLOCATING RESOURCE IN COMMUNICATION SYSTEM - A resource allocation apparatus in a communication system includes an identification unit configured to identify a new frequency band for transmission and reception of data between a plurality of terminals and a first access point, and identify a first frequency band which is being used by a second access point in the new frequency band; a setting unit configured to divide the new frequency band into sub bands of a basic frequency band, and set priorities of the sub bands; and an allocation unit configured to allocate the sub bands in correspondence to the priorities, for transmission and reception of data between the plurality of terminals and the first access point. | 07-25-2013 |
20130188628 | METHOD AND APPARATUS OF SCANNING IN WIRELESS LOCAL AREA NETWORK SYSTEM - A scanning method in a wireless local area network (WLAN) system is provided. The scanning method includes transmitting by a station a probe request frame via a channel, and receiving by the station a probe response frame from a target access point (AP) to respond to the probe request frame. The probe request frame includes at least one of information regarding a response reception time and preference information regarding the target AP. | 07-25-2013 |
20130188747 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA IN COMMUNICATION SYSTEM - An apparatus for transmitting data in a communication system includes: a receiving unit configured to receive feedback information for each of a plurality of stations (STAB) in response to a control frame; an adjusting unit configured to adjust links of the STAB at frequency channels based on the feedback information, and set optimal links for the respective STAB; and a transmitting unit configured to transmit data to the STAB through the optimal links, wherein the feedback information comprises one or more of optimal stream number information, optimal modulation and coding scheme (MCS) information, optimal bandwidth information, average signal-to-noise ratio (SNR) information, space-time information, optimal space-time block coding (STBC) information, group ID information, coding type information, and FB Tx type information. | 07-25-2013 |
20130315219 | APPARATUS AND METHOD OF INDICATING BANDWIDTH IN WIRELESS COMMUNICATION SYSTEM - The phase rotation relates to an apparatus and method of indicating a bandwidth in a wireless communication system. This disclosure discloses a wireless device comprising a transmission transmitting and receiving a wireless signal and a processor operating in operative connection with the transmission, wherein the processor generates a PPDU (physical protocol data unit) to which a phase rotation application is selectively applied depending on a case of bandwidth indication or a case of no bandwidth indication. | 11-28-2013 |
20140004873 | ACCESS POINT APPARATUS FOR CONFIGURING NEXT GENERATION WIRELESS COMMUNICATION NETWORK AND METHOD OF OPERATING THE ACCESS POINT APPARATUS | 01-02-2014 |
20140037025 | TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: encoding an information bit and generating a block coded with an NCBPSS bit; generating two sub-blocks by parsing the coded block; and transmitting the two sub-blocks to the transmitter. By preventing the bits that are contiguous to the encoding block from having continuous identical reliabilities on a signal constellation, the deterioration of the decoding performance of the transmitter can be prevented. | 02-06-2014 |
20140119303 | OPERATING METHOD OF ACCESS POINT (AP) AND STATION FOR COEXISTENCE OF BASIC SERVICE SETS HAVING DIFFERENT BANDWIDTHS - An operating method of an access point (AP) for a coexistence of basic service sets (BSSs) having different bandwidths includes detecting at least one of a first signal having a channel bandwidth of the AP and a second signal having a channel bandwidth narrower than the channel bandwidth of the AP, establishing a BSS having the channel bandwidth of the AP, based on a result of the detecting, and reporting the establishment of the BSS to an adjacent BSS. | 05-01-2014 |
20140169387 | METHOD AND COMMUNICATION APPARATUS FOR TRANSMITTING GROUP FRAME, AND METHOD AND USER TERMINAL FOR RECEIVING GROUP FRAME - A communication apparatus and method for transmitting a group frame, and a user terminal and method for receiving a group frame are provided. The communication apparatus may transmit a group frame to each of a plurality of user terminals. The group frame may be generated by grouping, in a physical layer, frames that are respectively transmitted to the plurality of user terminals. | 06-19-2014 |
20140177605 | METHOD FOR TRANSMISSION SCHEDULING BY GROUPING STATIONS - Provided is a transmission scheduling method based on station grouping, including performing physical grouping on stations into sectors based on positions of the stations, performing logical grouping of each physical group into logical groups based on a common characteristic of the stations in each physical group, transmitting, to the stations, access scheduling information used to enable each logical group to access an access point at different time intervals, and controlling a station access based on the access scheduling information. | 06-26-2014 |
20140219225 | TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM - Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver. | 08-07-2014 |
20140242998 | TERMINAL AND BASE STATION IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE HIERARCHICAL CELLS AND COMMUNICATION METHOD OF TERMINAL IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE HIERARCHICAL CELLS - Disclosed are handover and connection of a terminal and control of connection of a terminal by a base station in a communication environment including a plurality of communication cells having different ranges of communication coverage. According to an exemplary embodiment, a terminal of a wireless communication system including a plurality of hierarchical cells determines whether the terminal accesses a microcell in a macrocell as the terminal moves based on whether a control signal transmitted from a micro-base station managing the microcell is detected in a communication environment including a plurality of hierarchical cells divided according to communication coverage, determines whether the terminal connects to the microcell based on a connection criteria for the microcell, and connects to the microcell when the connection criteria for the microcell are satisfied and conducts communications using the macrocell when the connection criteria for the microcell are not satisfied. | 08-28-2014 |
20140293911 | METHOD OF SHARING CHANNEL INFORMATION IN WIRELESS LOCAL AREA NETWORK (WLAN) SYSTEM - Provided is a method of sharing channel information performed by an access point (AP), the method including setting a master AP among adjacent APs, adjusting time stamp information on a point in time for communication based on a beacon received from the adjacent APs, estimating a carrier frequency offset (CFO) using a packet received from the master AP, and readjusting the time stamp information based on the estimated CFO. | 10-02-2014 |
20140294109 | METHOD AND APPARATUS FOR OPPORTUNISTIC INTERFERENCE ALIGNMENT (OIA) IN SINGLE-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (SU-MIMO) TRANSMISSION - A method and apparatus for opportunistic interference alignment (OIA) in single-user multiple-input multiple-output (SU-MIMO) transmission, the method including selecting an interference space, broadcasting information on the selected interference space, selecting a user terminal to be assigned a transmission opportunity for each subchannel based on leakage of interference (LIF) information when a request to send (RTS) message including the LIF information is received from at least one user terminal, and transmitting data to the selected user terminal. | 10-02-2014 |
20140294110 | METHOD AND APPARATUS FOR OPPORTUNISTIC INTERFERENCE ALIGNMENT (OIA) IN MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MU-MIMO) TRANSMISSION - A method and apparatus for opportunistic interference alignment (OIA) in multi-user multiple-input multiple-output (MU-MIMO) transmission, the method including broadcasting a random beam, receiving, from a terminal, feedback information determined based on the random beam, selecting at least one terminal to which data is to be transmitted from among terminals based on the feedback information, adjusting a transmission power based on the feedback information, and transmitting data to the selected at least one terminal based on the adjusted transmission power. | 10-02-2014 |
20140301294 | METHOD FOR DIRECT COMMUNICATION BETWEEN STATIONS IN WIRELESS LOCAL AREA SYSTEM - Disclosed is a method for direct communication between stations. The method for direct communication between stations may include: receiving scheduling information on a frequency selective transmission (FST) from an access point; setting up a link for communication with another station based on the scheduling information; and communicating with the other station using the link. | 10-09-2014 |
20140334476 | METHOD FOR TRANSMITTING DATA FRAME IN WIRELESS LOCAL AREA NETWORK AND APPARATUS FOR THE SAME - A wireless device of transmitting a data frame in a WLAN is provided. The wireless device includes: a MAC unit generating a data frame; a PHY unit transmitting a wireless signal of the data frame; and a processor being operably coupled to the MAC unit and the PHY unit and controlling a set of TXVECTOR parameters. The processor is configured for: generating the data frame, the data frame including a data field having a service field and a very high throughput signal information (VHT-SIG-B); and transmitting a wireless signal of the data frame via a operating channel bandwidth. The data field is scrambled with a scrambling sequence, the scrambling sequence is generated based on a initial scrambling sequence and a generator polynomial. The service field is determined based on the set of TXVECTOR parameters, the TXVECTOR parameters including an control information for the service field. | 11-13-2014 |