A frequency to be used in a cognitive wireless system is determined appropriately. A DB apparatus manages white spaces (WS) for each frequency, and calculates and reports, to a mobile terminal, WS vectors (distances from a mobile terminal location to an interference area in the four directions, north, south, east and west) for each frequency. The mobile terminal refers to the WS vectors and uses a frequency providing the longest available distance in a direction of movement. The available distance is calculated by interpolation (triangular interpolation, elliptical interpolation, rectangular interpolation) of WS boundaries using various methods. Desirably, the mobile terminal reports a direction of movement to the DB apparatus, and the DB apparatus reports the distance to an interference area only in the two directions near to the direction of movement. Furthermore, desirably, information indicating whether the interference areas in the two directions are the same area or different areas is added to the WS vectors, and the interpolation method employed by the mobile terminal is changed in accordance with this information.


    Access

    Download


    Export, share and cite



    Title :

    Frequency selection method and cognitive wireless system


    Contributors:

    Publication date :

    2016-04-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr



    FREQUENCY SELECTING METHOD AND COGNITIVE WIRELESS SYSTEM

    IHARA YUTAKA / ALTINTAS ONUR | European Patent Office | 2018

    Free access

    Cognitive Route Selection and Frequency Allocation for CubeSat Swarm

    Zhang, Wenkai / Behbahani, Alireza S. / Eltawil, Ahmed M. | IEEE | 2021


    Wireless charging station device with frequency selection and vehicle position determination

    HOCKE FREDRIK / KRAMMER JOSEF / WAGATHA HELMUT | European Patent Office | 2021

    Free access


    A cognitive radio enabled wireless aircraft cabin management system

    Heller, Christoph / Blumm, Christian | IEEE | 2013