BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram illustrating a construction of point-to-multipoint communication system according to one preferred embodiment of the present invention;
FIG. 2 is a block diagram illustrating constructions of a main transmission apparatus and subsidiary transmission apparatuses of FIG. 1;
FIG. 3A and FIG. 3B are diagrams for describing operation modes of a switch unit;
FIG. 4 is a table for describing operation patterns (modes) of the switch unit;
FIG. 5 is a flowchart for describing operations of multiple subsidiary transmission apparatuses;
FIG. 6 is a flowchart for describing an operation of the subsidiary transmission apparatuses of FIG. 1 and FIG. 2;
FIG. 7 is a flowchart for describing an operation of the main transmission apparatus of FIG. 1 and FIG. 2;
FIG. 8 is a timing chart for describing the timing of the communication method according to one preferred embodiment of the present invention; and
FIG. 9 is a block diagram illustrating a construction of a previous point-to-multipoint communication system.
Patent Application
20070223384
