摘要:
Provided are a method of controlling frame transmission in a wireless local area network (WLAN) and an apparatus using the same. A first retransmission control method includes: comparing the number of errors in a frame received from a server with a predetermined threshold; and adaptively not allowing retransmission of the frame on the basis of the comparison result. Therefore, optimal pictures can be provided without regard to a state of a WLAN environment by adaptively allowing retransmission frames in which errors are detected.
摘要:
An image photographing apparatus using location information, a method of storing data therefor, and a navigation apparatus using the location information included in the image data, are provided. The image photographing apparatus includes a filming unit for photographing an object and providing the image data, a location information providing unit for providing location information of the place where the image data is taken, a control unit for adding location information to an area of the image data, and a storage unit for storing the image data according to the control of the control unit. According to the apparatus and method, a user is required to perform less searching by creating and using the filenames including the location information when the image data is retrieved, thereby saving time, and the image data can be arranged and stored as the user desires, so that the image data can be managed efficiently.
摘要:
A method for transmitting multimedia data in a wireless network using an access point, comprising receiving information on a data quantity from each of stations, and assigning and sending a waiting time to each of the stations based on the received information on the data quantity. Consistent with another aspect of the present invention, there is provided a method for transmitting multimedia data in a wireless network using an access point, comprising providing, by each of stations, information on data quantity to the access point, receiving a waiting time assigned by the access point based on the received information on the data quantity, and transferring, by each station, the data through contention in accordance with the assigned waiting time.
摘要:
A fast hand-over method of a mobile device roaming in a wireless LAN environment includes: receiving GPS information; based on the received location information of the mobile device, searching one or more APs; by scanning the searched APs, detecting an AP to reassociate with; and reassociating with the detected AP. According to the method, when roaming in a wireless LAN environment, a mobile device calculates a moving path by using GPS information and then, by scanning only APs belonging to channels allocated to areas related to the moving direction, the mobile device can reduce a hand-over period, and as a result, a QoS guaranteed service can be provided continuously. Also, by using GPS information, the mobile device can selectively switch to an optimum network service in an area to which different network services are applied.
摘要:
An image photographing apparatus using location information, a method of storing data therefor, and a navigation apparatus using the location information included in the image data, are provided. The image photographing apparatus includes a filming unit for photographing an object and providing the image data, a location information providing unit for providing location information of the place where the image data is taken, a control unit for adding location information to an area of the image data, and a storage unit for storing the image data according to the control of the control unit. According to the apparatus and method, a user is required to perform less searching by creating and using the filenames including the location information when the image data is retrieved, thereby saving time, and the image data can be arranged and stored as the user desires, so that the image data can be managed efficiently.
摘要:
A time division-based wireless LAN communication method by use of an AP in an infrastructure mode, including, on the AP's side, receiving a time slot allocation request frame from a station, allocating time slots during which the station can transmit data based on the time slot allocation request frame, and broadcasting reservation information on allocated time slots. A time division-based wireless LAN communication system includes an AP receiving a time slot allocation request frame transmitted by a station, allocating time slots on this basis, with which the station can transmit data, and broadcasting reservation information on allocated time slots, and one or more stations transmitting the time slot allocation request frame to the AP when there is data to be transmitted, receiving reservation information on time slots allocated by the AP based on the received time slot allocation request frame, and transmitting the data according to reservation of the beacon.
摘要:
A tag-based content classification method of classifying content based on a custom tag defined using user taste-based category information and a content reproduction apparatus to perform the method. The content classification method includes: analyzing content, and classifying the content based on whether the content comprises a first custom tag, the first custom tag and a second custom tag, the first custom tag, the second custom tag, and a tag, or the first custom tag and the tag. The first custom tag is category information based on a user's taste, the second custom tag is usage information based on a pattern of use, and the tag is category information based on content information.
摘要:
A system for providing position information by using a wireless personal area network (WPAN), and a method of acquiring the position information of a mobile device thereof where the system includes: a first node including referenced position information; and a plurality of second nodes calculating their respective position information based on the reference position information of the first node, wherein the mobile device calculates its position information by using the reference position information received from the first node and/or one or more of the respective position information of the second nodes. According to the system and method, at an indoor place where a global positioning system (GPS) signal is weak or absent, the GPS position information can be acquired through the position information providing system using a low-price wireless LAN communication network.
摘要:
A fast hand-over method of a mobile device roaming in a wireless LAN environment includes: receiving GPS information; based on the received location information of the mobile device, searching one or more APs; by scanning the searched APs, detecting an AP to reassociate with; and reassociating with the detected AP. According to the method, when roaming in a wireless LAN environment, a mobile device calculates a moving path by using GPS information and then, by scanning only APs belonging to channels allocated to areas related to the moving direction, the mobile device can reduce a hand-over period, and as a result, a QoS guaranteed service can be provided continuously. Also, by using GPS information, the mobile device can selectively switch to an optimum network service in an area to which different network services are applied.
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.