KDDI R&D LABORATORIES INC.
|KDDI R&D LABORATORIES INC. Patent applications|
|Patent application number||Title||Published|
|20110222858||OPTICAL COMMUNICATION APPARATUS AND OPTICAL COMMUNICATION METHOD - A present invention provides an optical communication apparatus and method which can use a data modulator and an OFDM modulator more narrow band than a transmission band.||09-15-2011|
|20110158324||VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - It is a purpose of the present invention to provide a video encoding apparatus and a video decoding apparatus which are capable of providing real-time processing having improved coding performance. A video encoding apparatus AA includes an inter-encoding predicted value generating unit||06-30-2011|
|20090010163||LOAD BALANCE SERVER AND METHOD FOR BALANCING LOAD OF PRESENCE INFORMATION - A load balance server has a first database for recording a list of identifiers of the presence servers, a second database for recording a subscription message receiving rate, an entry retrieval means for selecting a presence server that the subscription message receiving rate is lowest, in presence servers included in the list of the entry based on the presence information, a presence server selecting means for selecting an additional presence server whichever subscription message receiving rate is lower than predetermined threshold Ts, when the subscription message receiving rate in the selected presence server is higher than predetermined threshold Ts, and a message sending/receiving control means for sending the public message to the selected presence server.||01-08-2009|
|20080304442||Wireless Base Station for Communications Network - A wireless base station includes: a trend factor regression expression calculator for determining, on the basis of measured wireless communication environment factor, the trend of the variation in the environment factor; a trend prediction value calculator for calculating, on the basis of the determined trend of the variation in the environment factor, the environment prediction value; an irregular variation factor calculator for calculating, on the basis of the difference between the determined trend of the environment factor variation and the measured environment factor, the magnitude of correction to be applied to the environment prediction value; and a radio environment prediction correction unit for correcting the environment prediction value according to the tolerance of the base station for its communication failure risk.||12-11-2008|
|20080279132||Wireless Communication Device - A plurality of nodes each including a transmitter, a receiver, and a controller is linked together via a network. The transmitter of a transmission node using multiple wireless interfaces sends a beacon message sending its own node identifier and wireless interfaces to at least one reception node, which in turn sends back a response message sending its own node identifier and at least one usable wireless interface. The controller of the transmission node determines the broadcast order based on the response message received by the receiver. The transmitter of the transmission node performs broadcasting or multicasting using the wireless interface, which is selected based on the broadcast order. Thus, it is possible to perform broadcasting or multicasting at an efficient usage of radio frequency while covering all reachable neighboring nodes in node-to-node wireless communications based on multiple wireless communication methods.||11-13-2008|
Patent applications by KDDI R&D LABORATORIES INC.