Patent ID: 8135011

Claim:
A method for operating a multipoint control system, comprising: providing the multipoint control system, wherein the multipoint control system includes a plurality of controlled units serially connected, each of the controlled units has a execution unit and an interpretive unit, each of the interpretive unit has a data processing unit and a memory unit; transmitting an information stream by a controller, wherein the information stream includes a first start packet and a plurality of first data packets, the first start packet includes a first leading message, a first address, and a first length message; modifying the first address by each of the data processing units of a present controlled unit included in each of the interpretive units according to the first leading message and transmitting to the next controlled unit; retrieving the first data packet corresponding to the first address by each of the interpretive units according to the first address, the first length message; and enabling each of the execution units included in each of the interpretive units according to content of each of the first data packets; wherein the first data packet having long propagation delay is selectively transmitted by the controller before the first data packet having short propagation delay so as to synchronously transmit the plurality of first data packets to the controlled units.