Distributed wireless ad hoc network

Abstract

The invention discloses a distributed wireless ad hoc network and solves the problems of a conventional wireless ad hoc network that the application universality is poor, the networking is complicated, the number of nodes is limited, and the reliability of data transmission is poor. Synchronization control and asynchronous transmission are realized according to the requirements of multi-node and multi-parameter distributed wireless data acquisition; both branch nodes and a mainframe adopt multi-channel and multi-address switching modes, and data transmission between the branch nodes and the mainframe is accomplished through address match identification and user-defined message combination; the mainframe reads data in a manner of requesting one branch node actively and skips the branch node when the request is timeout or is not responded; and data acquisition of the branch nodes is controlled by the transmission network through synchronously controlling the nodes or the main frame, and the mainframe accurately analyzes and positions a data packet lost during the data transmission process through a message and the message heading. The invention provides a reliable and feasible wireless networking method and an efficient and stable data transmission protocol thereof.

Description

Technical field: [0001] The invention relates to the field of distributed wireless data transmission, in particular to a one-to-many wireless networking method and a data transmission protocol thereof. Background technique: [0002] Data transmission is a crucial link in various data acquisition systems. It is mainly divided into wired transmission mode and wireless transmission mode. The wired transmission mode usually costs a lot of money, has a long construction period, is inconvenient to realize the application in mobile terminals, and is easy to introduce various interferences in data collection network applications, and cannot meet various requirements. Data transmission requirements in harsh environments or complex occasions. With the continuous improvement of the level of data acquisition technology and the expansion of the application environment, the way of data transmission is gradually developing from wired to wireless. Compared with wired transmission, wirele...

AI Technical Summary

Problems solved by technology

Among them, the GSM network has been widely used in various handheld terminals and wireless data transmission platforms. Its wide application is mainly due to the widespread deployment of the base station network, which fully meets the requirements of wireless communication distance, but the actual application must use a fixed Modules and interfaces, the corresponding service provider needs to charge a certain service fee, the overall cost of networking is relatively high, especially when the mature switch module is used, the control end still needs to write a specific transmission protocol when networking, in this case The GSM network is usually not suitable for a dedicated data transmission network with a small networking range; WIFI, as the current mainstream wireless networking method, has been widely used in various occasions, especially in the handheld terminal industry. The high transmission speed of WIFI is its A major advantage of being widely used, its mainstream application is to access the Internet in various hotspot servers, but it is impossible to obtain services in places without hotspot support, especially the limitation of its communication distance (usually in open areas Maximum 300 meters), which leads to WIFI is not suitable for some occasions of multi-branch node ad hoc network; Zigbee technology has been widely used in the field of dedicated data transmission network of multi-branch node ad hoc network, especially its mature integrated module The design structure is more convenient for the development of multi-branch node wireless products, but the networking process usually requires a specific communication protocol, and different wireless products usually have their own specific protocols, which have not formed a unified standard protocol; Bluetooth and infrared The technology is usually only suitable for point-to-point communication, not suitable for multi-point networking, and the communication distance between the two is usually limited to within a few meters

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