Optimization method for eliminating ZigBee interference in WiFi (wireless fidelity) communication

Abstract

The invention discloses an optimization method for eliminating ZigBee interference in WiFi (wireless fidelity) communication. The optimization method modifies the RTS / CTS (Request To Send / Clear To Send) mechanism in the 802.11 protocol, so that a ZigBee node can sense the existence of WiFi communication and carry out rollback, and thereby WiFi can obtain better transmission performance under ZigBee interference. The optimization method includes the following specific steps: (1) the CCA (Clear Channel Assessment) check method of WiFi communication is specified, and works under mode 0: energy detection mechanism; (2) the CTS frame structure of WiFi is filled, so that the transmission time length of the CTS frame structure is prolonged to a length which can be sensed by ZigBee signals, and the ZigBee node can carry out rollback when detecting the CTS frame of WiFi. The optimization method increase the data packet reception rate and transmission delay of WiFi communication under ZigBee signal interference, and is more suitable for WiFi communication under complex signal interference.

Description

technical field [0001] The invention relates to a wireless communication protocol, in particular to an optimization method for eliminating ZigBee interference in WiFi communication, and belongs to the technical field of communication. Background technique [0002] With the development of science and technology, compared with the traditional communication equipment limited by wired connection, the more convenient, fast and flexible wireless network has been developed rapidly. Wireless network communication technologies such as WiFi (802.11), ZigBee (802.15.4) are more and more widely used in daily life. WiFi is a wireless network technology based on the IEEE802.11 standard. It is one of the most popular network protocols in daily applications. It is deployed in offices, homes, entertainment, and even urban outdoor areas. The WiFi protocol works in the 2.4GHz ISM frequency band, as attached figure 1 , which has a total of 14 overlapping frequency bands, each with a width of ...

AI Technical Summary

Problems solved by technology

However, in the cross-protocol hidden terminal problem, due to the "language barrier" between the ZigBee node and the WiFi device, the RTS / CTS mechanism used by the 802.11 protocol to solve the hidden terminal problem cannot be implemented according to the settings, and ZigBee cannot know the information contained in the CTS packet. The signal is to remind yourself to get out of the way

[0007] Due to the power difference between ZigBee and Wi-Fi, most of the existing technologies have studied the situation of ZigBee under signal WiFi interference, but there is little research on the situation of WiFi being interfered by ZigBee

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