Wireless measurement and control communication protocol based on ieee802.15.4g standard

Abstract

The invention discloses an IEEE (Institute of Electrical and Electronic Engineers) 802.15.4g standard-based wireless monitoring communication protocol, and belongs to the technical field of embedded wireless monitoring. IEEE802.15.4g is a standard of a physical layer named SUN, which is established by Institute of Electrical and Electronic Engineers (IEEE) in recent two years, the physical layer is supplemented on the basis of an IEEE802.15.4 standard, and the IEEE802.15.4g standard is particularly suitable for battery powered infrastructure sensor networks which have ultralow power consumption, remote transmission and excellent anti-noise performance. Although IEEE802 is still standardized at present, a draft scale has been determined basically, so the set of standard is necessarily tracked and studied timely, and based on the underlying standard, a set of ultralow power consumption wireless upper-layer communication protocol applied to the field of smart grid monitoring is designed and developed. The protocol aims at a star network topological structure, working method steps for a network coordinator node and a sensor node are respectively designed, and the protocol has the characteristics of low velocity, ultralow power consumption, low complexity and the like.

Description

technical field [0001] The invention relates to a wireless measurement and control communication protocol based on the IEEE802.15.4g standard, and belongs to the technical field of embedded wireless measurement and control. 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 (Smart Utility 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 intelligent instruments and meters during communication, and will help to increase the stability an...

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Problems solved by technology

[0005] 2. The software process of the system cannot dynamically adjust the time interval of data collection and dynamically add or delete nodes according to the needs of changes in surrounding environmental factors.

[0006] 3. The working current of the microprocessor chip in this system is 1.1mA / MHz, and the current in low-power sleep mode is 20uA, while the working current of the microprocessor MSP430F5438A is only 165uA / MHz, and the current in low-power sleep mode is as low as 2.6 uA; and the nRF905 it uses is not as good as the CC1120 chip that conforms to the IEEE802.15.4g protocol regardless of the communication distance, performance and power consumption

[0008] 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

[0009] 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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