Hybrid remote wireless sensor network system and communication method thereof

Abstract

The invention relates to a hybrid remote wireless sensor network system and a communication method thereof. The hybrid remote wireless sensor network system comprises a plurality of wireless terminals, more than one relay and a gateway. The wireless terminals are taken as end nodes of the network, are mobile nodes and are used for collecting user information, sending the information to the gateway and receiving the information from the gateway. The relays are taken as intermediate nodes for communication and are used for forwarding the information from the terminals and the gateway and providing a synchronous mechanism for communication in a coverage range of the relays and a data routing function. The gateway is taken as a sink node of the network and is used for receiving the information from the wireless terminals and the information forwarded by the relays, providing the synchronous mechanism for the wireless sensor network and is responsible for managing the wireless terminals in a management network. The wireless sensor network provided by the invention is established through adoption of a low-power-consumption remote wireless technology, such as a LoRa modulation technology and a Sigfox technology and has the advantages of low power consumption and long transmission distance.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a hybrid long-distance wireless sensor network system (WSN) and a communication method thereof. Background technique [0002] In field activities such as emergency rescue and outdoor exploration, there is often a need for information transmission. Such as the transmission of the geographic location information of the rescue team, the release of command information, etc. At present, in such activities, a walkie-talkie system is usually used for data transmission. However, the walkie-talkie method can only achieve half-duplex communication, and it consumes a lot of power and is inconvenient to set up relays. It cannot meet the requirements for battery life of communication equipment and fast and flexible network set-up in field activities. In recent years, with the development of communication technology, especially the development of Internet of Things technolo...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN105813099A discloses an outdoor wireless communication system based on LoRa ad hoc network, which is used to solve the technical problems of poor mobile network signal, short transmission distance and no interactive interface for information sharing in the existing outdoor wireless communication system. It includes a central processing unit, a positioning module, a Bluetooth module, a peripheral device interface, a power supply module, a LoRa communication module and a mobile phone APP terminal; the central processing unit is respectively connected to the positioning module, the Bluetooth module, a peripheral device interface, a power supply module and a LoRa communication module; The LoRa communication module and other system LoRa communication modules build a wireless Mesh network, and perform reliable data communication through the CSMA / CA protocol and AODV routing algorithm; the mobile phone APP terminal and the Bluetooth module exchange data through Bluetooth

However, the CSMA / CA protocol based on the competition mechanism will lead to more network conflicts and a sharp drop in network efficiency with the increase of terminal nodes.

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