摘要:
A wireless LAN communication device is provided for making it possible to set beacons including DTIM information elements not to be synchronous in the case that the timing for generating the beacons including DTIM information elements is the same among access points, so that it is avoidable that only a terminal device under a specific access point among access points using the same channel is subjected to a delay and jitters, while anxiety about mutual interference of the terminal devices is removed in the case of broadcast and multicast service, so that a fair broadcast and multicast service can be received. In the device, a wireless LAN control unit (202) detects beacons of other stations received in a prescribed period of time before the transmission of its own station (200). A beacon analyzing unit (203) analyzes the beacons of the other stations and adjusts transmission intervals of its own DTIM beacon.
摘要:
An image display apparatus including an image receiving unit that receives an image signal on which additional display information is superimposed, an image display unit that displays the image signal on which the additional display information is superimposed in a screen, and an information display unit that displays predetermined display information at a display position of the additional display information so that the additional display information displayed in the screen is hidden.
摘要:
There are provided a communication system, a radio LAN base station control device, and a radio LAN base station device capable of increasing the control reliability and improving communication stability and safety between the radio LAN base station control device and the radio LAN base station device. In this communication system (10), a plurality of data tunnels are formed between an AP control device (100) and the radio LAN base station device (200) and the data tunnels are used according to the frame type (control data frame, data frame, etc.) so as to increase the reliability that the AP control frame reaches the radio LAN base station device (200). As a result, control reliability between the AP control device (100) and the radio LAN base station device (200) is increased. Thus, it is possible to improve the communication stability and safety in the communication system (10).
摘要:
A wireless LAN communication device is provided for making it possible to set beacons including DTIM information elements not to be synchronous in the case that the timing for generating the beacons including DTIM information elements is the same among access points, so that it is avoidable that only a terminal device under a specific access point among access points using the same channel is subjected to a delay and jitters, while anxiety about mutual interference of the terminal devices is removed in the case of broadcast and multicast service, so that a fair broadcast and multicast service can be received. In the device, a wireless LAN control unit (202) detects beacons of other stations received in a prescribed period of time before the transmission of its own station (200). A beacon analyzing unit (203) analyzes the beacons of the other stations and adjusts transmission intervals of its own DTIM beacon.
摘要:
A wireless terminal device which can be easily connected with an access point with a simple procedure and with no expertise, a wireless connection method and a program are provided. In a wireless terminal device (100), when information (SSID) for identifying the access point and authentication information (encryption key) used for connection with the access point are inputted, each of system judgment units (123 to 127) performs a trial connection with the connection target access point according to the obtained access point information and authentication information in accordance with the selected security system in series and determines the security system by which the trial connection succeeds as the security system used for the actual communication.
摘要:
It is possible to perform access from a global network side to a private network side so as to realize mutual communication between the global network and the private network while maintaining security. A table setting unit (307) decides a correspondence between a private IP address and a global IP address and registers it in an address conversion table (310). The address conversion table (310) holds the private IP address and the global IP address while correlating them to each other.
摘要:
There are provided a communication system, a key distribution control device, and Wireless LAN base station device capable of more synchronizing the key configuration time of the Wireless LAN base station device with that of a communication terminal device, thereby reducing the communication cut-off period generated between the Wireless LAN base station device and the communication terminal device. In this communication system, an AP control device (100) can concatenate (encapsulate) an EAPoL-Key frame as first key information used by the communication terminal device (300) and second key information used by the Wireless LAN base station device (200) so as to generate a single frame (a key configuration request frame) and transmit the frame to the Wireless LAN base station device (200). The Wireless LAN base station device (200) separates the received frame into the EAPoL-Key frame as the first key information and the second key information used by the Wireless LAN base station device (200). The EAPoL-Key frame is transmitted to the communication terminal device (300).
摘要:
An access point control system capable of easily executing the correspondence between the BSSID and the VLAN of an access point device. This access point control system (100) comprises a plurality of access point devices (110-1, 110-2) , and an access point control device (120) for controlling the access point devices (110-1, 110-2) by sending a message to the access point devices (110-1, 110-2). The access point control device (120) is provided with a frame division unit (123) for dividing the frames from the access point devices (110-1, 110-2) into a plurality of VLAN networks (130-1, 130-2) on the basis of the BSSID, and division target changing means for changing the VLAN networks (130-1, 130-2) of the division targets divided by the division unit (123).
摘要:
There is provided a portable terminal device that enables a user to operate all buttons to be operated by moving only one finger of one hand carrying the terminal when operating the terminal equipped with both a touch panel and a stationary operation section and that exhibits superior operability. The portable terminal device has enclosures 11, 12 with a movable portion, a display section 17 capable of displaying visible information showing an operation target area, and a touch sensor 13 that detects a position on a display screen of the display section touched by a user's finger, or the like. The device is further provided with a shape detection section for detecting a change in the shape of the enclosure; an input operation management section for managing a position detected by the touch sensor and an operation target area of each of pieces of visible information displayed on the display section in an associated manner; and a display control section that automatically makes a change to at least display positions of the respective pieces of visible information about the operation target displayed on the display section in accordance with a change in shape of the enclosure detected by the shape detection section.
摘要:
A wireless terminal device which can be connected to a wireless LAN service to which the terminal can be connected without regard to the identifier for specifying a wireless LAN service, a wireless connection method, and a program are provided. A wireless terminal device (100) stores common authentication information (200) that can be verified by a plurality of access points (111 to 113) in common in a common authentication information DB (104) in advance. Before connecting to the wireless LAN, the wireless terminal device repeats a trial in order to be authenticated with respect to the connectable wireless LAN service according to the common authentication information (200) until the connection is made.