Card reader and communication method thereof

Abstract

The invention belongs to the technical field of wireless sensor network and particularly discloses a card reader. The card reader comprises a first communication module and a second communication module connected with the first communication module, wherein the first communication module is used for carrying out data communication with upper-layer equipment and receiving bottom-layer node information by adopting a first wireless channel; the second communication module is used for continuously sending broadcast information to bottom-layer nodes by adopting a second wireless channel. The invention also discloses a communication mode of the card reader. By the adoption of the card reader, the in-time transmission of information of the upper-layer equipment can be ensured, and the loss of information sent from bottom-layer equipment is avoided to a certain extent.

Description

technical field [0001] The present application relates to the technical field of wireless networks, and in particular, to a card reader and a communication method in a wireless sensor network. Background technique [0002] Wireless sensor networks are widely used in the underlying data acquisition due to their low power consumption and low cost. Usually, the underlying information nodes of wireless sensor networks are often powered by batteries. In order to control the power consumption of the nodes, the wireless data transceiver is often turned off when idle, so as to ensure the low power consumption of the information nodes to run for a long time. This results in that each information node cannot communicate in real time, and also limits the information sending and receiving method of the information nodes. The existence of the distributed mode of wireless sensor network, at the same time, because the time of each node cannot be accurately synchronized, it is impossible t...

AI Technical Summary

Problems solved by technology

However, it has obvious shortcomings in actual use, that is, it cannot realize effective information transmission from upper-layer equipment to lower-layer dormant nodes.

Once the upper layer needs to operate on the lower layer, when transferring data, since the upper layer device cannot know when the underlying device sleeps and wakes up, this communication method cannot be implemented or is extremely unreliable

Especially in case of an emergency, the failure to ensure timely communication between the upper equipment and the lower equipment will lead to significant property and personnel losses

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