Access mode based on TDMA wireless sensor network

Abstract

The invention relates to an access mode based on a TDMA wireless sensor network. In the TDMA wireless sensor network, the access mode comprises the following steps: each coordinator fixedly occupies a specific time slice, when the time reaches a given time slice, a broadcast signal is transmitted, and a device which does not access the network is guided to acquire the information of the network; after starting up, the device intercepts the broadcast signal of the coordinator; and through intercepting the broadcast signal, the device accesses the network at the specific time slice. The access mode has the following advantages: an occupied bandwidth is narrow, the mode is suitable for network planning optimization, radio resources are saved to the utmost extent, and the difficulty of the network planning optimization is simplified; more access channels are provided, and the probability of successful access is raised; a network access load is balanced to the utmost extent, and each coordinator and a terminal device in the network are always in an optimal configuration state.

Description

[0001] technical field [0002] The invention relates to wireless sensor network technology, in particular to a wireless sensor network access method. [0003] Background technique [0004] Wireless sensor networks (Wireless Sensor Networks, WSN) have 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 for some inconvenient In the field of wiring, such as industrial fields such as online monitoring of electric high-voltage equipment, online monitoring of vibration of rotating equipment, or some occasions that often require mobile testing, such as industrial test data acquisition systems, etc. [0005] The wireless sensor network represented by Zigbee is realized through the networking mode of CDMA (Code-Division Multi-Access) or Direct-Sequence Spread-Spectrum (Direct-Sequence Spread-Spectrum) communication and FDMA (Frequency-D...

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Problems solved by technology

[0010] 3) The transceiver structure of spread spectrum communication is more complicated, and it is very difficult to realize

[0012] 1) More wireless bandwidth must be allocated to different coordinators;

[0013] 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;

[0014] 3) When a certain coordinator fails and cannot work, the terminal equipment it belongs to 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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