Patent application number | Description | Published |
20080267074 | METHOD OF SETING QoS PACKET FLOW AND HANDLING QoS PACKET IN PACKET SWITCHING SYSTEM - Provided is a method of setting a QoS packet flow and processing a QoS packet for providing a QoS service. In the method of setting a QoS packet flow in the packet switching system, whether there are VOQs that are not pre-allocated is determined in response to a QoS packet flow setting request. If there are no VOQs that are not pre-allocated, it is determined whether there are VOQs that have not been used for a predetermined period. If there are VOQs that have not been used for the predetermined period, one of the VOQs is selected. Thereafter, an inactive state of a flow using the selected VOQ is indicated and QoS parameters set for the flow are released. Therefore, metro Ethernet services such as E-LINE and E-LAN can be provided in an Ethernet network and custom QoS services such as Diff Serv and ACL can be provided in an IP network. Also, limited resources can be efficiently used and thus costs can be reduced. | 10-30-2008 |
20100118816 | APPARATUS AND METHOD FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - 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. | 05-13-2010 |
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 |
20120263126 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - Disclosed are an apparatus and a method for transmitting/receiving data by acquiring channel information of a terminal receiving data in a communication system providing services to users through beamforming according to a multi-input multi-output (MIMO) scheme, wherein so as to acquire channel information of the terminal for transmitting/receiving data through the beamforming according to the MIMO scheme, a null data packet announcement (NDPA) frame and a null data packet (NDP) frame are transmitted to the terminal, the beamforming frame is received from the terminal as a response of the null data packet announcement frame and the null data packet frame, and the channel information of the terminal included in the beamforming frame and the indication information on which the null data packet frame included in a control information field of the beamforming frame is normally received are checked. | 10-18-2012 |
20130094488 | METHOD FOR CHANNEL SOUNDING IN WIRELESS LOCAL AREA NETWORK AND APPARATUS FOR THE SAME - A channel sounding method in a wireless local area network (WLAN) system and an apparatus supporting the same are provided. A method of performing a sounding operation by an access point (AP) in a wireless local area network (WLAN) includes: generating a beamforming report (BR) poll frame including a sounding sequence; transmitting the BR poll frame to a station (STA); and selectively performing transmission beamforming on the station according to whether or not the BR frame is received from the station before a predetermined timeout. Transmission of an erroneous BR frame in case that a beam receiver fails to receive an null data packet announcement (NDPA) and an null data packet (NDP) is eliminated and a degradation of transmission efficiency is prevented. | 04-18-2013 |
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 |
20140269656 | MULTI-USER MULTIPLE-INPUT AND MULTIPLE-OUTPUT (MU-MIMO) TRANSMISSION METHOD AND SYSTEM IN WIRELESS LOCAL AREA NETWORK (WLAN) - Provided is a data transmission method and system in a wireless local area network (WLAN) supporting a multi-user multiple-input and multiple-output (MU-MIMO), the method including determining a type of a first frame to be transmitted to at least one reception terminal, setting, based on a result of the determining, user identification (ID) information indicating an order of the at least one reception terminal, transmitting the first frame to the at least one reception terminal corresponding to the user ID information, receiving, from the at least one reception terminal, a second frame corresponding to the first frame, extracting, based on the received second frame, a beamforming parameter of the at least one reception terminal, and transmitting, to a physical (PHY) layer, the user ID information and the beamforming parameter corresponding to the at least one reception terminal. | 09-18-2014 |
20140307722 | METHOD AND APPARATUS FOR TRANSMITTING BEAMFORMING REPORT FRAME FOR TRANSMIT BEAMFORMING - A method of transmitting a beamforming report frame for transmit beamforming is provided. The method may include acquiring, by a receiver, data of a signal transmitted by a transmitter, selecting either media access control (MAC) software or MAC hardware, to assign a sequence number based on a type of the data, and assigning a sequence number to the management frame based on the data, using either the MAC software or MAC hardware that is selected. | 10-16-2014 |
20150016558 | UPLINK MULTI-USER MULTIPLE-INPUT AND MULTIPLE-OUTPUT (UL MU-MIMO) TRANSMISSION REQUEST METHOD IN UL MU-MIMO COMMUNICATION - Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including transmitting, to each of a plurality of stations (STAs), an uplink multi-user request (UL MU request) frame requesting transmission of a data frame, and receiving, from each of the plurality of STAs, the data frame during an identical period of time based on an identical reception intensity, wherein the UL MU request frame includes at least one of information on a transmission time of the data frame and information on a reception intensity of the data frame in the AP. | 01-15-2015 |
20150043482 | METHOD OF TRANSMITTING AND RECEIVING FRAME FOR UPLINK MULTI-USER MULTIPLE-INPUT AND MULTIPLE-OUTPUT (UL MU-MIMO) COMMUNICATION - Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including determining at least one transmission station (STA), transmitting, to the transmission STA, an uplink multi-user poll (UL MU poll) frame requesting a data frame, receiving the data frame from the at least one transmission STA simultaneously, and transmitting an acknowledgement (ACK) frame to the at least one transmission STA in response to the receiving. | 02-12-2015 |