Medium-long range wireless sensor network networking system

Abstract

The invention relates to a medium-long range wireless sensor network networking system which comprises at least two end machines and at least two base stations. A TCP (Transmission Control Protocol) / IP (Internet Protocol) local area network networking mode is adopted in the networking system. Wireless transmitting terminals of the end machines and wireless receiving terminals of the base stations are all used as dedicated hosts. The wireless terminals of the end machines and the base stations are arranged in the same network segment. The wireless terminals of the base stations are used as gateway hosts. Wire terminals of the base stations are connected to a base station control system through the Ethernet. Hardware of the networking system is realized by FPGAs (Field Programmable Gate Arrays) which are in asynchronous parallel connection. A physical layer of the networking system is an OFDM (Orthogonal Frequency Division Multiplexing) wireless channel. Software of the networking system is realized by registering a private protocol stack into a tap device. The tap device is used for being externally abutted with a Linux TCP / IP protocol stack through a network card driving interface, internally realizing communication between a private wireless network protocol and OFDM hardware modules in the base stations and the end machines, providing a character device driver for parameter transmission between an application program and the OFDM modules. Due to the adoption of the medium-long range wireless sensor network networking system, the networking of a plurality of end machines to wireless transceiving nodes of a plurality of base stations can be realized.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a medium and long-distance wireless sensor network networking system. Background technique [0002] Conventional LAN networking methods are divided into two types: wired and wireless. The wired method is based on the IEEE802.3 standard, often using twisted pair, coaxial cable, and optical fiber as the transmission medium; the wireless method is based on the IEEE802.11 standard wireless local area network. In the field of security and monitoring, the former is suitable for occasions where the terminal is fixed, while the latter has a transmission distance of only 100 meters and is suitable for small-scale networking. [0003] The terminal machine of the developed high-speed image transmission system works in the vehicle-mounted, airborne or ship-borne mobile environment. It is a data transmission system in the middle and long range. The wireless networking metho...

AI Technical Summary

Problems solved by technology

[0003] The terminal machine of the developed high-speed image transmission system works in the vehicle-mounted, airborne or ship-borne mobile environment. It is a data transmission system in the middle and long range. The wireless networking mode of 11 is limited by the transmission distance. At the same time, due to the use of public frequency bands, it is not conducive to the realization of dedicated network networking.

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