Multidrop network system

A multidrop network system comprising N network devices, the N network devices including a master device and (N−1) slave device(s), each of the N network devices having at least one identification code as an identification in the multidrop network system, M transmission-permissible devices of the N network devices earning transmission opportunities in turn in each round of data transmission of the multidrop network system, each of the M transmission-permissible devices performing a count operation to generate a current count value, when the current count value reaching a first extreme value, the current count value is reset to a second extreme value, and the first extreme value and the second extreme value jointly define a count range of the current count value, wherein:

• the M transmission-permissible devices include the master device and one of the (N−1) slave device(s);
• the N is an integer greater than one, and the M is an integer greater than one but not greater than the N;
• the first extreme value and the second extreme value are an upper limit and a lower limit of the count range respectively, or are the lower limit and the upper limit of the count range respectively;
• a total number of the identification codes of the M transmission-permissible devices is not fewer than the N, and a difference between the first extreme value and the second extreme value is not fewer than the N;
• when the identification code of a transmission-permissible device among the M transmission-permissible devices is the same as the current count value, the transmission-permissible device earns a transmission opportunity;
• and
• during an Xth round of data transmission of the multidrop network system, a Kth device of the M transmission-permissible devices has multiple identification codes and earns multiple transmission opportunities, in which the total number of the identification codes of the M transmission-permissible devices is greater than the M, the K is a positive integer not greater than the M, and the X is a positive integer.