Wireless repeater, the method for wireless repeating, and data communications system

A method for wireless repeating between first and second apparatuses communicating in a first bandwidth, including:

• communicating with the first apparatus through a first communication line of the first bandwidth;
• communicating with the second apparatus through a bundle of second communication lines, where each second communication line is a wireless communication line of a second bandwidth and the bundle of second communication lines has the first bandwidth;
• automatically recognizing that a new wireless communication line of the second bandwidth is added as a new second communication line, or that a part of the bundle of second communication lines becomes non-usable,
• as a result of the recognizing, dynamically determining a number N of usable second communication lines;
• and
• dynamically increasing or decreasing the capacity of the first bandwidth of the first communication line according to increase or decrease in the determined number N, through dividing data in the first bandwidth into the determined number N of the second bandwidths, and through N-fold-multiplexing data in the second bandwidths into the first bandwidth.

A data communication system that includes:

• a plurality of data relay devices communicating with each other through at least a part of ring topology transmission route including a first communication line of a first bandwidth, where each data relay device controls the sending and receiving of the data between the first communication line and a network connected to the data relay device;
• and
• wireless repeaters existing between the data relay devices;
• wherein each of said wireless repeaters includes:
• a communication module for communicating with one of the plurality of data relay devices in the first bandwidth;
• a plurality of wireless communication units, each for communicating with another wireless communication unit in another wireless repeater through each of a bundle of second communication lines, where each second communication line is a wireless communication line of a second bandwidth and the bundle of second communication lines implements a part of the ring topology transmission route of the first bandwidth;
• and
• a band control unit for
• automatically recognizing one or more of the wireless communication units that are added during operation, or the wireless communication unit that is lost during operation,
• as a result of the recognizing, dynamically determining a number N of usable wireless communication units;
• and
• dynamically increasing or decreasing the capacity of the first bandwidth of the first communication line according to increase or decrease in the determined number N of the usable wireless communication units, through dividing data in the first bandwidth into the determined number N of the second bandwidths, and through N-fold-multiplexing data in the second bandwidths into the first bandwidth.