Patents Assigned to Nippon Telegram and Telephone Corporation
  • Patent number: 5062035
    Abstract: An improved time slot allocation method for a loop network. Loop networks in which the present invention is applied include a loop-connecting a control station and a number of branch stations. The control and branch stations each have at least one terminal connected thereto such that interstation communication, when demanded by a terminal, is made by passing a frame through the transmission path. The frame includes a synchronization area for indicating the leading end of the frame, a fixed-length control area, and a data area composed of a plurality of time slots. According to the invention, the control and branch stations are each allocated with a predetermined or unique number of time slots to be used by terminals for interstation communication. When a station has its reserve of unused time slots fall below a preset lower limit, the control station supplements time slots from its own reserve.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: October 29, 1991
    Assignees: Kabushiki Kaisha Toshiba, Nippon Telegram and Telephone Corporation
    Inventors: Shigeaki Tanimoto, Tadashi Kayano, Hirobumi Karasawa, Osamu Yamagishi, Tomoo Kunikyo