NTT DoCoMo

About: NTT DoCoMo is a based out in . It is known for research contribution in the topics: Base station & Mobile station. The organization has 4032 authors who have published 8655 publications receiving 160533 citations.

Image encoding apparatus, image encoding method, image encoding program, image decoding apparatus, image decoding method, and image decoding program

Abstract: The image encoding apparatus of one embodiment of the present invention comprises a coding mode determination unit, a prediction image generation unit, a storage unit, and an encoding unit. The coding mode determination unit determines a coding mode relating to which of the first image prediction processing or second image prediction processing is used for generating prediction image of a partial area of input images. The prediction image generation unit extracts the prediction assist information by the first image prediction processing and generates a prediction image based on the prediction assist information. The storage unit stores the reproduced image that is based on the prediction image. The encoding unit generates a bit stream comprising data obtained by encoding the coding mode information and prediction assist information.

Apparatus and method for reading and decoding information contained in a barcode

Abstract: An image output device inputs content information, generates a barcode by encoding input content information, and outputs print data so that a sign visually indicating a property of the content information is printed adjacent to the generated barcode or by superimposing the sign on the generated barcode.

Molecular communication for health care applications

Abstract: Molecular communication is a new communication paradigm using molecules as a communication carrier. In molecular communication, information is encoded onto molecules at senders and the molecules propagate to receivers in a controlled manner. The receivers, upon receiving the molecules, decode the encoded information and react biochemically. Molecular communication provides means to deliver molecules to destinations and allows biological and artificially-created components to communicate with each other. This paper describes a design of a molecular communication system that has potentialities to enable future health care applications.

Positioning system, positioning method, and positioning program

Abstract: An object of the present invention is to implement accurate positioning of a mobile communication terminal even in an environment in which delay waves are included in radio waves arriving at the mobile communication terminal from radio wave sources A positioning server 10 forming a positioning system for estimating a location of a cellular terminal 20 has a distance information acquisition unit 13 for acquiring information indicating distances calculated based on radio waves transmitted and received between a plurality of cellular base stations 30 and the cellular terminal 20; a direction information acquisition unit 14 for acquiring a plurality of pieces of information indicating directions of radio waves received by the cellular terminal 20; a virtual sector calculation unit 15 for calculating for each of the cellular base stations, a range of directions from the cellular base station 30 to the cellular terminal 20 from the information indicating the directions of the radio waves, based on a range calculation rule stored in advance; and a location calculation unit 16 for calculating the location of the cellular terminal 20, based on the distances and the range of directions

Method and apparatus for prioritized information delivery with network coding over time-varying network topologies

Abstract: A method and apparatus is disclosed herein for information delivery with network coding over time-varying network topologies. In one embodiment, the method comprises decomposing a sequence of topology graphs that model a time-varying network topology into a plurality of virtual graphs, where each virtual graph of the plurality of virtual graphs corresponds to a distinct traffic class, and the virtual topology graph representing a partial topology of a time-varying network. The method also includes selecting a network code for each virtual graph in the plurality of the virtual graphs to meet requirements of the distinct traffic class corresponding to said each topology graph, where the network code is used to encode packets of the associated traffic class, and processing packets of each traffic class using the network code determined by its corresponding virtual topology and the requirements of said each traffic class, including using a virtual buffer system to implement the network code corresponding to each traffic class over the physical network topology. The method also includes using a scheduler to determine the transmission schedules for each output packet from the virtual buffer system of each traffic class where the scheduling decisions are based, at least in part, on the QoS requirements of each class.