An identification card and its operating method

Abstract

The invention belongs to the technical field of wireless sensor network, and especially discloses an identification card, comprising a first timer, a counter, a processing module, and a radio frequency module. The first timer is used for first preset time timing when the identification card is in a dormant state, and at the first preset time, the first timer sends signals to the processing module. The counter is used to count the number of timing of the first timer, and when the number gets to a preset number, the counter sends signals to the processing module, and the counter is reset. The processing module is used for hardware detection of a control according to the signals of the first timer, and controls starting of the radio frequency module according to the signals of the counter. The radio frequency module is started according to control commands of the processing module, and is used for data exchange with the external through a radio-frequency channel. Through the identification card, power utilization of the identification card is reduced, and node wake-up number is greatly reduced.

Description

technical field [0001] The present application relates to the technical field of wireless networks, in particular to an identification card and an operating method in a wireless sensor network. Background technique [0002] Low power consumption has always been an important characteristic of wireless sensor networks. Since the terminal nodes of the wireless sensor network are generally powered by batteries, in order to ensure the working time, it is often necessary to turn off the energy-consuming module of the terminal node for wireless data transmission and reception to reduce the operating power consumption. [0003] In order to solve the energy consumption problem of terminal nodes in wireless sensor networks, a lot of energy has been put into research (including improvements of MAC protocol and routing protocol) all over the world. [0004] The power consumption control of the terminal nodes in the wireless sensor network mainly focuses on the reasonable switching of t...

AI Technical Summary

Problems solved by technology

However, due to the mobility of the terminal node, the address sent last time may be sent unsuccessfully due to mobile transformation according to the routing information.

Who to send to when the terminal node wakes up becomes the bottleneck of this working mode; simple broadcast transmission often easily leads to unreliable communication; and if a connection needs to be established after each wake-up to ensure the reliability of communication, the cost of establishing a connection It is much higher than the cost of sending and collecting information. Sending data once may require multiple transmissions between terminal nodes to complete the establishment of the connection, which will consume more energy of the terminal nodes.

At the same time, using the broadcast method in establishing a connection is likely to cause channel occupation conflicts

In addition, in this method, usually the upper-layer device can only passively receive the status data or alarm data sent by the terminal node, and the upper-layer device cannot actively alert the terminal node to dangerous situations such as the environment

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