Method and equipment for transmitting data

Abstract

The embodiment of the invention provides a method and equipment for transmitting data. The method for transmitting the data comprises the following steps that: a network node determines that a target sensor node to which the data is transmitted is in an inactive period; the network nodes sends an awakening message to the target sensor node, wherein the awakening message is used for triggering the target sensor node to enter an awakened state from a dormant state in the inactive period; the network node receives a response message, which corresponds to the awakening message, which is sent by the target sensor node; and the network node transmits the data to the target sensor node according to the response message. According to the method and the equipment for transmitting the data, the network node sends the awakening message to the target sensor node which is in the inactive period to ensure that the target sensor node is awakened from the dormant state, and then the network node transmits the data to the target sensor node, so that the network node can transmit the data to the target sensor node without waiting for the next superframe active period when the target sensor node is in the inactive period, time delay of data transmission is shortened, and synchronization of the data transmission is guaranteed.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular, to a data transmission method and device. Background technique [0002] The wireless sensor network is composed of a large number of miniature sensor nodes deployed in the monitoring area. It is a multi-hop self-organizing network formed by wireless communication. At present, the wireless sensor network has been widely used, but the sensor nodes are powered by batteries. When the battery energy is exhausted, the sensor nodes will lose their function. Therefore, reducing energy consumption is an important technology to prolong the life cycle of wireless sensor networks. [0003] In the prior art, the sensor nodes are in the wake-up state during the active period of the superframe, and can perform data interaction with the network nodes at this time, while during the inactive period of the superframe, the sensor nodes enter the sleep state to redu...

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Problems solved by technology

[0004] In the process of implementing the embodiment of the present invention, the inventors found that in the prior art, when the sensor node needs to interact with the network node during the inactive period, the network node needs to wait until the next superframe active period arrives before interacting with the sensor node. Data interaction, which increases the delay of data transmission

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