Communication organization method and repeater thereof based on massive node cluster
A large-scale, repeater technology, applied in the direction of data exchange through path configuration, electrical components, transmission systems, etc., can solve problems such as inability to support cluster control and management, global addresses increase the burden of node identification, and inability to support clusters, etc. , to achieve the effect of error management and correct transmission of information, improvement of reliability, and stable transmission of information
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Embodiment 1
[0042] Aiming at the above purpose and target, the method proposed by the present invention is roughly divided into five parts: node group architecture, address mapping, frame structure extension, relay protocol extension and repeater hardware design. Firstly, complete the node group architecture part, and find the network topology that satisfies the constraints on the number of nodes. Then, through address mapping, the mapping relationship between the global address and the local address of the terminal node is found. Afterwards, through frame structure expansion and relay protocol expansion, protocol support for node group management and control is established to realize communication organization based on large-scale node groups. Its main parts are as follows:
[0043] 1. Node group structure;
[0044] The network topology is as figure 1 As shown, the only master controller in the node group is connected to the terminal through the repeater, presenting a tree topology. ...
Embodiment 2
[0063] Repeater hardware design such as Image 6 , Figure 7 , Figure 8 , Figure 9 shown. The hardware circuit control chip uses a relatively cheap 51 dual-port single-chip microcomputer STC12C5A60S2, while the RS485 interface uses an enhanced Max3085. Because the repeater has a lot of store-and-forward work during the repeating process, the internal memory of the 51 single-chip microcomputer is too small to meet the demand, so a 32K WS62256LLP static expansion memory is added externally, and a latch SN74HC573AN is added as a data latch auxiliary . Since RS485 adopts differential transmission, it is difficult to ensure that the ground potentials of different nodes are within the common-mode voltage range under the condition of large clusters. By isolating the power supply and signal of the control chip and the Max3085 interface, and connecting the transceivers in each local area network to the common ground, the impact is minimized. The power isolation adopts the B0505...
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