Wireless relay system based on cluster-tree network

Abstract

The invention provides a wireless relay system based on a cluster-tree network. The wireless relay system comprises a tree network composed of a plurality of wireless repeaters, and a cluster network composed of a plurality of sets of wireless terminal equipment and the wireless repeaters. The wireless relay system based on the cluster-tree network can effectively prolong the communication distance, improve the reliability of data transmission, and improve the timeliness of the data transmission.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a wireless relay system based on a cluster tree network. Background technique [0002] At present, the 433MHz communication technology based on short-distance wireless communication is developing rapidly in the fields of fire alarm, environmental monitoring, industrial control, etc. In the case of the required maximum transmission power, the communication distance is usually no more than one kilometer in an open area, and the signal attenuation is more serious when used in buildings. Since in the actual engineering installation and use, the communication distance requirements between two adjacent devices using wireless radio frequency module communication cannot be determined, in order to meet the actual requirements, the actual communication distance is usually extended by adding a repeater. [0003] At present, the traditional repeaters based on 433MHz frequency band comm...

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Problems solved by technology

[0004] (1) The traditional wireless repeater has the function of forwarding and transmitting the received data. At present, the common method is point-to-point data forwarding and communication function. This kind of repeater adopts the method of transparent data transmission. When it is necessary to expand the communication of the system In terms of coverage, since repeaters cannot be cascaded, the data transmission distance is very limited

[0005] (2) Repeaters with cascading communication functions, but only realize the cascading of a single communication link. If the number of terminal devices is large, the number of repeaters required will increase significantly in the same proportion, and the increase in the number will increase Same-frequency signal interference of large-space wireless communication data

Causes a decrease in reliability during data transmission

[0006] (3) Repeaters that can form a mesh network. When the amount of communication data in a space changes suddenly at a certain time, due to the complex and changeable network transmission path, it is easy to cause the delay time of communication data in the entire network to be uncertain. Reduce the timeliness of transmitting data

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