摘要:
Provided are a method and apparatus for generating a data frame. The method includes generating subframes from at least one media access control (MAC) service data unit (MSDU); generating a retransmission policy field for recording a policy related to a retransmission request, against an error occurring while the subframes are being transmitted, with regard to each of the subframes; and generating the data frame by using the subframes and the retransmission policy field which is generated with regard to each of the subframes.
摘要:
A method for transmitting a wireless data, including: (a) transmitting first data frames of the wireless data at a first transmission rate; (b) storing results of retransmissions of the first data frames in a first window array; (c) determining a second transmission rate; and transmitting the second data frames.
摘要:
Provided is a wireless local area network (LAN) communication method in the Distributed Coordination Function mode. The method includes (a) setting a predetermined back-off according to the characteristic of data transmitted, and (b) transmitting data if a channel is available at the end of the back-off, and updating the back-off using residual back-off when a channel is used during the back-off. The data transmission throughput can be increased by reducing the back-off according to the characteristic of data to be transmitted. An increase in the data transmission throughput is particularly effective in transmitting real-time data.
摘要:
A networking apparatus and channel switching method being used by the same, wherein the networking apparatus includes a beacon frame checking unit which determines whether a beacon frame to be transmitted to a device has been transmitted, a channel searching unit which searches for another channel as a result of the determination, and a first channel switching unit which switches a current channel to another channel as a result of the search.
摘要:
Provided is a packet processing apparatus and method for audio/video (AV) data transmission, in which a simple protocol optimized for AV data transmission is used. Information distinguishing a data packet from a control packet may be included in a data link layer packet header, so that a data packet and a control packet may be distinguished from each other and thereby may be processed according to different procedures.
摘要:
A method of providing priority-based discriminated services in a wireless LAN environment. More particularly, providing discriminated services while maintaining compatibility with existing 802.11 MAC through a priority index map configured to enable discriminated services. A method of providing priority-based discriminated services in a wireless LAN environment consistent with the present invention includes determining priority ranks for terminals in the wireless LAN environment; and determining backoff times based on the determined priority ranks, and attempting to occupy a channel by sending frames according to the determined backoff times if predetermined channel occupation latency elapses after the transmission of a last frame is completed.
摘要:
Provided are a method of enabling a multi-input multi-output (MIMO) station and a single input single output (SISO) station to coexist in a wireless network and a wireless network device. The method includes receiving information on a station when the station accesses a wireless network, setting coexistence information by comparing a number of antennas of the station accessing the wireless network with a number of antennas of a plurality of stations constituting the wireless network, and transmitting a frame containing the coexistence information to the plurality of stations constituting the wireless network.
摘要:
Disclosed is a device for feeding a recordable paper in an ink jet printer. The device according to the present invention is designed such that a recordable paper stacking plate is upward shifted by a reciprocal movement of a carriage to be positioned at a paper feeding position at an initial printing so that a recordable paper is in close contact with a feed roller. Thus, the recordable paper is picked up by a rotation of the feed roller and moved to a base frame. As a result, it is possible to save a time for feeding the recordable paper and printing data on the recordable paper. Further, there is advantage in that a time for picking up the recordable paper can be reduced by using a CR motor having a large torque.
摘要:
A capping apparatus for an ink-jet printhead protects a printhead of an ink-jet cartridge moved to a service station by a carriage during a standby mode. The apparatus includes a cap which seals the lower surface of the ink-jet cartridge surrounding the printhead, is spaced from the printhead by a predetermined gap and forms a sealed space; a cap holder which is connected to the lower portion of the cap and supports the cap; and a support portion which is connected to the lower portion of the cap holder and attaches to and detaches the cap and the cap holder from the lower surface of the ink-jet cartridge. A boss which penetrates the cap holder is formed in the cap, and an insertion element inserted into the boss to form a vent path to connect the sealed space to the outside.
摘要:
A wireless data transmitting method through wireless network communications using an access point in an infrastructure mode including a contention-free period. The method includes the access point being set up to operate in the contention-free period, a first data frame including channel occupation information of a second data frame in order to occupy a channel when the access point transmits the first data frame to a designated wireless network apparatus, the wireless network apparatus transmitting an acknowledgement frame of the receipt of the first data frame to the access point, and the access point being released from the contention-free period.