公开(公告)号：DE3069679D1

公开(公告)日：1985-01-03

申请号：DE3069679

申请日：1980-12-08

Applicant: IBM

Inventor： BUX WERNER DR ,  MULLER HANS-RUDOLF ,  JANSON PHILLIPPE DR ,  SZE DANIEL TSI WING DR

IPC: H04L12/433 ,  H04L12/64 ,  H04L11/16 ,  H04Q11/04

Abstract: In a ring communication system comprising several stations, access to the ring is granted to one station at a time by a circulating token indication. A method is provided guaranteeing a transmission opportunity for synchronous or circuit-switched data in periodic time intervals to authorized stations. A CS monitor station issues a frame header which is marked in a specific bit position to allow only authorized stations to transmit their synchronous data together with a distination address. In a first embodiment, a single frame comprises a plurality of slots each having a free/busy indication, a destination address field and a field for synchronous data, and each authorized station can occupy one such slot. In a second embodiment, a marked frame can be used by only one authorized station for transmitting synchronous data, but a new marked frame header is reissued until all authorized stations around the ring have transmitted synchronous data.

公开(公告)号：DE3071510D1

公开(公告)日：1986-04-24

申请号：DE3071510

申请日：1980-12-23

Applicant: IBM

Inventor： GFELLER FRITZ DR ,  MULLER HANS-RUDOLF

IPC: H04B10/00 ,  H04B10/10 ,  H04B10/118 ,  H04B10/22 ,  H04H20/67 ,  H04L27/00 ,  H04B9/00 ,  H04H3/00

公开(公告)号：FR2296339A1

公开(公告)日：1976-07-23

申请号：FR7535236

申请日：1975-11-10

Applicant: IBM

Inventor： MULLER HANS-RUDOLF ,  SCHINDLER HANS DR ,  VETTIGER PETER

IPC: H04M1/00 ,  H04M19/00 ,  H04Q3/42 ,  H04Q3/72 ,  H04Q5/00 ,  H04M9/04