Wireless ad hoc network system and working method based on ieee802.15.4g

Abstract

A wireless self-organizing networking system based on the IEEE 802.15.4g and a working method belong to the technical field of the Internet of Things. The system comprises a host computer, a network coordinator, and sensor nodes. The IEEE 802.15.4g supplements a physical layer based on the EEE 802.15.4 standard protocol, and is especially applicable to wireless sensing networks which are ultra-low in power consumption, relatively low in transmission rate and which require long distance transmission. The wireless self-organizing networking system based on the IEEE 802.15.4g and the working method of invention design a self-organizing network wireless sensing network system based on a bottom standard of the IEEE 802.15.4g. The system is simple in networking mode, low in power dissipation, and good in robustness and link self-healing capability. The system and the method are applicable to aspects such as industrial control, wireless metering, environment monitoring, etc.

Description

technical field [0001] The invention relates to an IEEE802.15.4g-based wireless ad hoc network system and a working method, belonging to the technical field of Internet of Things and wireless sensing. Background technique [0002] Smart grid technology is a new type of electronic technology that emerged in the 21st century, improving the grid infrastructure of the 20th century, enabling two-way communication between homes and businesses and public facilities. At present, Task Group 4 of the IEEE802.15 working group, which aims to promote the standardization of short-range wireless communication, has begun to formulate a supplementary standard IEEE802 named "SUN (SmartUtility Networks / Smart Utility Neighborhood)" aimed at smart meter communication. 15.4g. The formulation of this supplementary standard will help to greatly reduce the power consumption of smart instruments and meters during communication, and will help increase the reliability of transmission. Based on the un...

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Problems solved by technology

[0004] 1. The ZigBee protocol stack itself has certain disadvantages. For example, if the network coordinator cannot work normally due to power failure or other reasons and needs to be restarted, all sensor nodes need to be restarted at this time, otherwise the sensor nodes will try to connect to other networks.

Also, if it is necessary to form a more complex tree or grid network, the power consumption will inevitably increase, and the network link will be relatively unreliable

[0005] 2. Since the frequency band used by ZigBee in China is 2.4GHz, compared with the frequency band below 1GHz, this frequency band has shorter transmission distance, greater attenuation in the transmission process, weak signal penetration and diffraction capabilities, and greater negative effects of multi-path propagation. In addition, the frequency band is already very crowded at present, and there are still many different standards such as WIFI and Bluetooth, and the mutual interference is relatively large.

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