tdma-based wireless sensor network star ad hoc network

Abstract

The invention relates to a star-shaped self-networking mode and a system of a wireless sensor network based on TDMA (time division multiple address). The technical scheme of the system is: all coordinators at the same wireless sensor network operate by using the same frequency; the coordinators with the same frequency interference operate through a TDMA mode (namely when one coordinator operates at the wireless sensor network, the normal communication of the other coordinator is influenced), when one coordinator A operates, other coordinators which possibly interference the coordinator A or are interfered by the coordinator A stop operating; and the coordinators without the same frequency interference can operate simultaneously (namely when one coordinator in the wireless sensor network operates, the influence to another coordinator can be neglected). According to the invention, not only can the same frequency interference be avoided, but also the unnecessary band width distribution can be saved.

Description

Technical field [0001] The present invention relates to wireless sensor network technology, in particular to a networking method and system of wireless sensor network. Background technique [0002] Wireless Sensor Networks (Wireless Sensor Networks, WSN) have now begun to be widely used in industrial monitoring, smart grid, smart home, smart transportation, public safety, medical and health, environmental protection and other social industries, especially suitable for some inconvenient wiring Fields, such as industrial fields such as on-line monitoring of power high-voltage equipment, and on-line monitoring of vibration of rotating equipment; or occasions where mobile testing is often required, such as industrial test data acquisition systems. [0003] The wireless sensor network represented by Zigbee realizes the wireless sensor network through CDMA (Code-Division Multi-Access) or Direct-Sequence Spread-Spectrum (Direct-Sequence Spread-Spectrum) communication and FDMA (Frequency-D...

AI Technical Summary

Problems solved by technology

[0007] 3) The transceiver structure of spread spectrum communication is more complicated, and it is very difficult to realize

[0009] 1) More wireless bandwidth must be allocated to different coordinators;

[0010] 2) When the terminal device switches between coordinators working on different frequencies, it needs to additionally monitor the coordinators on all possible frequencies, resulting in unnecessary time overhead and complex physical implementation;

[0011] 3) When a certain coordinator fails and cannot work, the terminal equipment to which it belongs must adjust the working frequency and connect to the coordinator on other frequency points, so the robustness of the network is not strong, and the self-healing ability is poor

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