Abstract: Provided are a bandwidth-allocation method and apparatus for a wireless network based on a time division transmission mechanism, and a method and apparatus for transmitting and receiving data on the wireless network. The data transmission method includes at least one wireless device belonging to the wireless network transmitting a frame to a network coordinator, the frame including a transmission mode of data and used to request a time slot, receiving a beacon frame containing information about the transmission mode and a time slot duration from the network coordinator, and transmitting the data in the transmission mode to other wireless devices belonging to the wireless network during the duration of the time slot, wherein the transmission mode indicates whether the data is transmitted by a wide-band signal or a narrow-band signal.

Abstract: An apparatus and method are provided for transmitting and receiving wireless data and a method of transmitting and receiving wireless data in which a frame is transmitted via one of a plurality of channels, a response frame is received via another of the channels in return for the frame, the receive sensitivity for the frame is determined based on the response frame, and a set of TXVECTOR parameters are controlled according to the determination. The apparatus includes a media access control (MAC) unit which generates a data frame, a first physical (PHY) unit which transmits a wireless signal of the data frame via a first channel, a second PHY unit which receives a control frame comprising a receive sensitivity for the wireless signal via a second channel, and a parameter control unit which adjusts a set of TXVECTOR parameters for the data frame via the first channel based on the control frame.

Abstract: An apparatus and method for wireless communications are provided. The apparatus for wireless communications includes a media access control processing unit providing a plurality of sub-packets, and a transmitting/receiving unit outputting a packet that includes the plurality of sub-packets using a plurality of transmission modes.

Abstract: An apparatus and method for wireless communications are provided. The apparatus for wireless communications includes a receiving unit which receives a packet, which comprises a plurality of sub-packets, output from a transmitting device, and processes the received packet in a plurality of signal processing modes that correspond to a plurality of transmission modes applied to the received packet, and a media access control processing unit which acquires data from the sub-packets included in the processed packet.

Abstract: Provided are a data transmission apparatus and method which apply an appropriate coding rate according to significance of bits or bit groups included in uncompressed data and retransmit all or part of the data when a transmission error occurs in the data while the data is being transmitted over a wireless network. The data transmission apparatus includes a mode termination unit which determines a retransmission mode for an initial transmission packet which has a transmission error; a packet generation unit which generates a retransmission packet, which includes at least part of the initial transmission packet, according to the determined retransmission mode; and a communication unit which transmits the retransmission packet through a communication channel.

Abstract: A method and apparatus for a coordinator handover in high frequency bandwidth wireless communication are provided. The apparatus having the coordinator includes a device priority list that records the priority of devices that can act as a coordinator, a handover controller that requests a handover to a selected device by referring to the device priority list, and a transceiver that transmits network information to the device according to the handover.

Abstract: A method is provided for determining a transmission rate of a control response frame for acknowledging data receipt in a wireless local area network. The method includes obtaining transmission parameters of a transmitting station from a data transmission frame received from the transmitting station, searching a receiving station for transmission parameters which correspond to the transmission parameters of the transmitting station, determining the transmission rate of the control response frame according to transmission parameters of the receiving station if the transmission parameters corresponding to the transmission parameters of the transmitting station are found in the receiving station, and determining a maximum rate among a set of basic transmission rates to be the transmission rate of the control response frame if the transmission parameters corresponding to the transmission parameters of the transmitting station are not found in the receiving station.

Abstract: A wireless communication technology, and more particularly, a transmission packet for wireless transmission in a high frequency band, and a method and apparatus for transmitting and receiving using the same, are described. The structure of a transmission packet may include an MPDU composed of a plurality of transmission data units, a MAC header unit added to the MPDU, and a PHY header unit added to the MAC header unit, wherein the MAC header unit includes a MAC header generated based on the information used in a MAC layer, a first HCS field which determines if an error occurred in the MAC header or the PHY header, a MAC header extension field which exists depending on the setting of an indicator field in the MAC header, and a second HCS field which determines if an error occurred in the MAC header extension field.

Abstract: A transmission packet structure for transmitting uncompressed AV data is provided. The transmission packet structure includes a payload including multiple TDUs error-correction coded at a predetermined coding rate, wherein the payload is classified according to importance of bits constituting the uncompressed AV data; a MAC header added to the payload, wherein information for medium access control is recorded in the MAC header; and a PHY header comprising information about the coding rate, wherein the PHY header is added to the MAC header.

Abstract: A method and apparatus for encrypting data. The method includes assigning bits included in data units to a plurality of data blocks based on positions of the bits in the data units and encrypting the data blocks. The apparatus includes an assignment unit which assigns bits included in the data units to a plurality of data blocks based on positions of the bits in the data units; and an encryption unit which encrypts the data blocks.

Abstract: There is provided a wireless communication method, the method including selecting first and second channels that apply different data transmission capabilities, respectively, and transmitting and receiving data using the selected first and second channels.

Abstract: A wireless network system and a method of transmitting/receiving data over a wireless network, and more particularly, for transmitting/receiving data over a wireless network capable of allowing a station that has not received a beacon frame or has received a damaged beacon frame among stations performing wireless communication in a high-frequency band to acquire schedule information in a super frame. A wireless network coordinator according to an exemplary embodiment of the invention includes: a media access control (MAC) unit that generates a beacon frame for forming a super frame including one or more channel time blocks; a band managing unit that allows a station on a network to set a specific channel time block among the channel time blocks to a period in which a packet including a predetermined control command is transmitted or received; and a transmitting unit that transmits the beacon frame including information on the setting through a predetermined communication channel.

Abstract: A beacon packet is provided. The packet includes a first information field that includes channel-time-allocation information in a wireless network; and information about whether there is residual channel time that can be allocated to a device that belongs to the wireless network.

Abstract: An apparatus and method of enhancing a block Ack in a WLAN is disclosed. The apparatus includes a frame verification module receiving a plurality of data frames and selecting erroneous frames, a sequence control mapping module mapping sequence numbers of the selected frames with spoofing numbers, and a frame combining module combining the mapped frames with other sequence frames and transmitting the combined frames. The data frames include spoofing sequence control frames with which the spoofing sequence numbers are mapped.

Abstract: A stored transmission packet having a structure intended for use in a new link-adaptation mechanism, and a method ahd an apparatus for transmitting the transmission packet using the same are disclosed. The structure includes a payload composed of a plurality of transmission data units, a MAC header appended to the payload, and a PHY header appended to the MAC header, wherein the payload includes a link recommendation command in which information on a transmission mode is recorded, among a link-adaptation mechanism including Link Assessment, in which the state of a channel used to transmit and receive the transmission packet and the quality thereof is assessed, Link Recommendation, in which a transmission mode suitable for a current channel state is recommended using the result of Link Assessment, and Link Adjustment, in which the channel state is adjusted using information on the recommended transmission mode.

Abstract: The invention relates to a structure of a transmission packet for a link adaptation mechanism that can efficiently transmits/receives uncompressed data using a link adaptation mechanism in a high-frequency wireless communication, and an apparatus and method of transmitting/receiving a packet using the same. According to an aspect of the invention, a structure of a transmission packet for a link adaptation mechanism includes a payload having a plurality of data units obtained through error correction encoding of uncompressed data at a predetermined coding rate, an MAC header being added to the payload and having a link adaptation field and a link adaptation extension field expressing presence/absence of the link adaptation field for transmission/reception of the uncompressed data, and a PHY header being added to the MAC header and including information about the coding rate and information about usability of an unequal error protection mode.

Abstract: A wireless communication method and apparatus are provided. The wireless communication method includes receiving a packet including information of a device connected to a wireless network, the wireless network uses a first channel and a second channel supporting different transmission capabilities, and storing the information of the device included in the packet.

Abstract: A method of managing channel allocation for uncompressed isochronous data transmission includes broadcasting a first superframe for a first beacon period, the first superframe containing a control section and a data slot section; receiving a request frame from at least one wireless device belonging to a network via the control section, the request frame requesting addition of a data slot for uncompressed isochronous data transmission; transmitting a response frame to the at least one wireless device via the control section in response to the request frame; and broadcasting a second superframe for a second beacon period, the second superframe containing the data slot added to the at least one wireless device.

Abstract: Provided are an apparatus and method for allocating a data slot to transmit uncompressed audiovisual (AV) data. The method includes transmitting a first superframe that includes a data-slot-reservation period during a first beacon period and information thereon; receiving a frame that requests the data slot from at least one of wireless devices included in a network, in the data-slot-request period; transmitting a response frame to the data-slot-request frame to at least one of the wireless devices; and transmitting a second superframe that includes a data slot allocated to at least one of the wireless devices during a second beacon period.

Abstract: A method and apparatus for efficiently transmitting large multimedia data over a wireless network are provided. A wireless device includes a device information reading unit which receives and reads information regarding available capabilities of devices included in a wireless network; a control unit which selects a first device which can process a video stream and a second device which can process an audio stream from the devices based on the information; a stream generation unit which generates a video stream and an audio stream which form the same content; and a wireless transmission/reception unit which transmits the generated video stream to the first device and transmits the generated audio stream to the second device.