Patent application number | Description | Published |
20120320755 | METHOD OF COMMUNICATION FOR STATION OPERATING BASED ON BATTERY IN WIRELESS LOCAL AREA NETWORK SYSTEM AND APPARATUS FOR THE SAME - A method of communication based on battery in a wireless LAN system is provided. The method includes receiving, by a station (STA), a battery lifetime request message from an access point (AP), wherein the battery lifetime request message includes a battery lifetime report interval field and battery lifetime report threshold field, the battery lifetime report interval field indicating an interval at which the STA report a battery lifetime, the battery lifetime report threshold field indicating a threshold of the battery lifetime and transmitting, by the STA, a first battery lifetime report message including information indicating a first battery lifetime. | 12-20-2012 |
20130329620 | METHOD FOR COMMUNICATION BASED ON IDENTIFYING INFORMATION ASSIGNMENT AND APPARATUS FOR THE SAME - A communication method based on identifying information assignment in a wireless local area network (WLAN) system, performed by a station (STA), is provided. The method includes receiving an identifier assignment message from an access point (AP), wherein the identifier assignment message comprises identifying information for the STA, and TIM offset information for a time point at which at least one traffic indication map (TIM) element for the STA starts to be transmitted; receiving a first TIM element from the AP at a time point indicated by the TIM offset information; determining whether the first TIM element comprises the identifying information; and receiving a first data frame from the AP if the first TIM element contains the identifying information. | 12-12-2013 |
20140126509 | METHOD FOR TRANSMITTING AND RECEIVING DATA UNIT BASED ON UPLINK MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT TRANSMISSION AND APPARATUS FOR THE SAME - In an aspect, a method of receiving a data unit, performed by an Access Point (AP), in a Wireless LAN (WLAN) system is provided. The method includes transmitting a signal protection frame, the signal protection frame comprising a group ID field indicating a Multiple Input Multiple Output (MIMO) transmission STA group including a first station (STA) and a second STA; and, a spatial stream field indicating a number of spatial streams allocated to each of member STAs included in the MIMO transmission STA group; receiving a first preamble for a first data unit from the first STA; receiving a second preamble for a second data unit from the second STA; and simultaneously receiving the first data unit from the first STA and the second data unit from the second STA. | 05-08-2014 |
20140153469 | COMMUNICATION METHOD IN WIRELESS LOCAL AREA NETWORK SYSTEM - A communication method performed by a target station in a WLAN system is provided. The method includes receiving a relayed TIM message from a relay station, the TIM message comprising a relayed TIM field indicating whether there is buffered traffic intended to be transmitted from an AP to the target station, determining whether there is the buffered traffic based on the relayed TIM field, receiving a data frame related to the buffered traffic, if the relayed TIM field indicates that there is the buffered traffic, and switching to a doze state, if the relayed TIM field indicates that there is no buffered traffic. The relayed TIM field is determined based on a TIM element transmitted from the AP to the relay station. The TIM element is transmitted in a first period, and the relayed TIM message is transmitted in a second period. | 06-05-2014 |
20140204821 | METHOD FOR TRANSCEIVING DATA ON BASIS OF SERVICE PERIOD SCHEDULING IN WIRELESS LAN SYSTEM AND APPARATUS FOR SUPPORTING SAME - Provided is a method for transceiving data in a wireless LAN system on the basis of station (STA)-based service period scheduling. The method comprises entering an awake state, configuring a service period for transceiving an access point (AP) and data, transceiving the AP and the data during the service period, and entering a doze state when the service period ends. | 07-24-2014 |
20140204891 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING FRAME ON THE BASIS OF FREQUENCY SELECTION TRANSMISSION - A method for communicating in a wireless local area network is provided. The method includes receiving allowed channel information from a second station, the allowed channel information indicating whether at least one channel is allowed for transmission, selecting, by the first station, at least one operating channel from the at least one allowed channel, and transmitting, by the first station, frames on the at least one selected operating channel. The allowed channel information comprises an allowed channel bitmap. Each bit of the allowed channel bitmap indicates each channel is allowed for the transmission. | 07-24-2014 |
20140211680 | COMMUNICATION METHOD AND COMMUNICATION APPARATUS BY STATION THAT OPERATES IN POWER SAFE MODE IN WIRELESS LAN SYSTEM - A method for communication performed by a station in a wireless local area network system is provided. The method includes receiving a first change sequence from an access point, transmitting a probe request frame to an access point in order to request updated system information, the probe request frame including the first change sequence, and receiving a probe response frame from the access point in response to the probe request frame. The probe response frame includes a second change sequence. The first change sequence and the second change sequence indicate a change of system information within a basic service set (BSS). | 07-31-2014 |
20140233483 | METHOD AND DEVICE FOR TRANSMITTING FRAME - Disclosed are a method and device for transmitting a frame. The method for transmitting a frame includes a step of generating A-MPDU (aggregate MAC protocol data unit) and a step of transmitting A-MPDU. The A-MPDU includes a first AMPDU subframe and a second A-MPDU subframe, wherein the first A-MPDU subframe includes a data block, and the second AMPDU subframe includes an FEC (Forward Error Correction) coding block which is additionally used in the decoding of the data block. Thus, the STA is capable of preventing unnecessary power consumption of STA by selectively determining whether FEC information is received according to whether an error occurred in the decoded data. | 08-21-2014 |
20140247746 | LINK ADAPTATION AND DEVICE IN ACTIVE SCANNING METHOD - Disclosed are a link adaptation method and device in an active scanning method. The link adaptation method transmits a the probe request frame comprising null data packet announcement (NDPA) information elements, transmits a null data packet (NDP) frame comprising only a physical layer convergence protocol (PLCP) header after transmitting the probe request frame, and receives a the probe response frame comprising feedback information elements measured based on the NDP frame. Therefore, the invention is capable of improving data transmission efficiency by using a modulation coding scheme (MCS) suitable for a channel state from initial connection. | 09-04-2014 |
20140247838 | METHOD AND APPARATUS FOR INDICATING A FRAME TYPE USING A PREAMBLE - Disclosed are a method and an apparatus for indicating a frame type using a physical layer convergence protocol header. A method for determining a frame type using a PLCP header may comprise: a step of demodulating a frame type contained in an SIG of the PLCP header so as to acquire information indicating a physical service data unit (PSDU) of a frame; and a step of acquiring frame information required for demodulating the frame contained in the SIG dependently on the information indicating PSDU. Thus, unnecessary information may not be additionally demodulated to thereby improve demodulation efficiency and reduce unnecessary power consumption. | 09-04-2014 |
20140286226 | METHOD FOR TRANSMITTING AND RECEIVING A FRAME IN A WIRELESS LAN SYSTEM, AND APPARATUS FOR SUPPORTING THE METHOD - Provided is a method for receiving a frame, which is to be performed by a station (STA) in a wireless LAN system. The method includes receiving a multicast frame from an access point (AP). The multicast frame includes a medium access control (MAC) header. The MAC header includes a transmitter address (TA) field and a receiver address (RA) field. The RA field includes a multicast association identifier for identifying an STA group including said STA. | 09-25-2014 |
20140286356 | METHOD AND DEVICE FOR INDICATING PLCP HEADER TRANSMISSION MODE - Disclosed are method and device for indicating a PLCP header transmission mode. A method for generating a physical layer convergence protocol (PLCP) of a data frame can comprise the following steps: demodulating PLCP header mode information based on a scrambling sequence of the received frame or information elements included in the received frame; and generating a data frame including the PLCP header generated based on the PCLP header mode information. The PLCP header mode information comprises at least one indication from a space time block coding mode indication, a guard interval mode indication, and a repetition mode indication. The invention is capable of improving data transmission efficiency by adaptively determining a transmission mode of a PCLP header to a channel situation. | 09-25-2014 |
20140294020 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL PARAMETER INFORMATION - The present invention relates to a method and apparatus for transmitting channel parameter information. A method for transmitting a frame in consideration of a channel environment includes the steps of: receiving long training field (LTF) setting information from a station; creating a frame including an LTF, a plurality of divided data fields, and an additional LTF on the basis of the LTF setting information; and transmitting the frame, wherein the LTF positions are ahead of the plurality of divided data fields, the additional LTF positions are between or behind the plurality of divided data fields, and the LTF setting information can be created on the basis of the movement of the station. Therefore, channel estimation performance can be increased. | 10-02-2014 |
20140313936 | METHOD AND DEVICE FOR SEARCHING FOR SERVICE FOR TERMINAL USING GAS PROTOCOL - Method and device for discovering a service are provided. A responding device receives a service request frame including a first service identifier indicating a service queried by the requesting device. The responding device transmits a service response frame to indicate that the queried service is currently not available and a service announce frame follows on. The responding device determines whether the queried service is accepted or not during a pre-defined time after transmitting the service response frame. | 10-23-2014 |
20140314054 | METHOD FOR TRANSCEIVING DATA ON BASIS OF GROUPING IN WIRELESS LAN SYSTEM, AND DEVICE FOR SUPPORTING SAME - Provided is a method for transceiving data in a wireless LAN system on the basis of a station (STA). The method comprises: receiving an allocation for an association ID (AID) by associating with an access point (AP); and exchanging data with the AP during the channel access period for an STA group comprising the STA. The STA group is grouped on the basis of the AID. | 10-23-2014 |
20140314056 | METHOD FOR TRANSMITTING AND RECEIVING A FRAME IN A WIRELESS LAN SYSTEM AND APPARATUS FOR SUPPORTING SAME - The present invention relates to a method for transmitting and receiving a frame performed by an AP in a wireless communication system. The method includes the steps of: transmitting a PST message providing instructions to transmit a frame to at least one STA; and receiving frames from a first STA and a second STA. The PST message includes first subband information indicating a first subband in which a first frame is transmitted from the first STA and second subband information indicating a second subband in which a second frame is transmitted from the second STA. | 10-23-2014 |
20140314064 | METHOD FOR TRANSMITTING DATA UNIT IN WIRELESS LOCAL AREA NETWORK SYSTEM AND APPARATUS FOR SUPPORTING SAME - Provided is a method for transmitting a data unit in a wireless local area network system, according to one embodiment. The method comprises transmitting a signal field, transmitting a first data symbol for a first data field, and transmitting a second data symbol for a second data field. The signal field, the first data symbol, and the second data symbol are transmitted through a 1 MHz channel bandwidth having a band of 1 GHz or less. Two pilot tones are inserted to each of the first data symbol and the second data symbol. | 10-23-2014 |
20140321349 | METHODS OF TRANSMITTING AND RECEIVING FRAME BY STATION OPERATING IN POWER SAVE MODE IN WIRELESS LAN SYSTEM AND APPARATUS FOR SUPPORTING SAME - The present invention relates to methods of transmitting and receiving a frame, which are performed by a station operating in a power save mode in a wireless LAN system. The method includes: transmitting a poll frame requesting the transmission of a buffered frame to an access point AP, wherein the poll frame includes a sustain time field that indicates a service section; and receiving at least one buffered frame from the AP within the sustain time in response to the poll frame. A method is provided for transmitting and receiving a frame executed by a station (STA) operating in a power sub mode in a wireless LAN system. The method includes transmitting a first poll frame requesting the transmission of a buffered frame to an access point AP, receiving an acknowledgement ACK frame in response to the first poll frame, and receiving at least one buffered frame from the AP. | 10-30-2014 |
20140328238 | GROUPING-BASED DATA TRANSCEIVING METHOD IN WIRELESS LAN SYSTEM AND APPARATUS FOR SUPPORTING SAME - Provided is a data transceiving method performed by a station (STA) in a wireless LAN system. The method comprises: receiving subgrouping parameter information from an access point (AP); determining whether a frame buffered in the STA subgroup in which the STA is contained exists or not based on the subgrouping parameter information; receiving a TIM element in a channel access interval for the STA subgroup from the AP if the buffered frame exists; and exchanging the AP and the frame in the channel access interval based on the TIM element. | 11-06-2014 |
20140328430 | METHOD AND APPARATUS FOR TRANSMITTING TRAINING FIELD - Disclosed are a method and apparatus for transmitting a training field. The method for transmitting a training field in a wireless LAN system comprises the steps of: transmitting additional long training field (LTF) indication information; and transmitting a frame including the additional LTF and partitioned data fields. The additional LTF comprises a field for demodulating the partitioned data fields included in the frame, the additional LTF indication information includes information on the location of the additional LTF included in the frame, and the partitioned data field includes at least one sub-field. Accordingly, the present invention can enhance channel estimation performance. | 11-06-2014 |
20140328435 | METHOD OF TRANSMITTING AND RECEIVING DATA UNIT IN WIRELESS LOCAL AREA NETWORK SYSTEM AND APPARATUS FOR THE SAME - A method for transmitting a data unit, performed by a transmitting station, in a wireless local area network system is provided. The method includes generating a repeated bit sequence, generating an interleaved bit sequence by interleaving the repeated bit sequence, generating at least one symbol by modulating the interleaved bit sequence, generating at least one OFDM symbol by performing IDFT (Inverse Discrete Fourier Transform) on the at least one symbol and transmitting the at least one OFDM symbol. | 11-06-2014 |
20140334420 | METHOD FOR PERFORMING CHANNEL SOUNDING IN WIRELESS LAN SYSTEM AND APPARATUS - The present invention relates to a method for performing channel sounding by means of an access point (AP) in a wireless LAN system. The method includes the steps of transmitting a null data packet announcement (NDPA) frame to notify that an NDP is to be transmitted, transmitting the NDP, and receiving a feedback frame from a station (STA). The NDP includes a signal field. The signal field of the NDP is transmitted through two orthogonal frequency division multiplexing (OFDM) symbols. One of the two OFDM symbols is a repeated OFDM symbol signifying that the other is repeated. | 11-13-2014 |
20140348047 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING FRAME USING SHORT GUARD INTERVAL - Disclosed are a method and a device for transmitting and receiving a frame using a short guard interval. A method for receiving a beacon frame comprises the steps of: receiving a first beacon frame which contains guard interval type information; determining a second beacon frame which is to be received after the first beacon frame on the basis of the guard interval type information; and receiving the second beacon frame, wherein the guard interval type information may be information which is related to a guard interval used when said second beacon frame is transmitted. Thus, since a station can determine whether to receive a frame using a certain guard interval, the station can receive a power-saving effect. | 11-27-2014 |
20140348148 | METHOD FOR TRANSMITTING AND RECEIVING FRAM IN WIRELESS LOCAL AREA NETWORK SYSTEM AND DEVICE SUPPORTING SAME - Provided is a method for receiving a frame that is carried out by a station (STA) in a wireless local area network (WLAN) system. The method comprises receiving the frame from an access point (AP). The frame comprises a medium access control (MAC) header. The MAC header comprises a transmitter address (TA) field and a receiver address (RA) field. The RA field comprises identification information that is set on the basis of an association identifier (AID), which is allocated when the STA is associated with the AP. | 11-27-2014 |