Information transmission method and node

Abstract

The embodiment of the invention provides an information transmission method. The information transmission method comprises the following steps: allocating multiple spreading codes having different time delays to multiple data streams, wherein the multiple spreading codes are in one-to-one-correspondence with the multiple data streams, and the code lengths of the multiple spreading codes are equal; respectively processing each data stream in the multiple data streams according to the corresponding spreading code to obtain multiple processed data streams; carrying out weighted summation on the multiple processed data streams to obtain a summarized signal; multiplexing the summarized signal with a preamble to obtain a digital signal; processing the digital signal to obtain a transmitted signal; and sending the transmitted signal. Therefore, the embodiment of the invention provides a brand new interconnection method between nodes, and the method can meet the demands of low power consumption, wide area coverage, access to massive terminals and low cost.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, to an information transmission method and node. Background technique [0002] With the gradual rise of smart cities, more and more devices need to collect data and upload the collected data to the server through communication links. Further, the operator's server can analyze the uploaded data, so as to provide better service or more effective management for each device. Many devices do not have an independent power supply, but are powered by batteries, so a low-power transmission method is needed to ensure that the device uploads the collected data to the server. [0003] Generally speaking, the frequency of data collection by equipment is very low, and the amount of data collected each time is very small. In order to reduce the construction cost of the entire system, a concentrator is proposed to manage a large number of equipment. The concentrator serves multiple devic...

AI Technical Summary

Problems solved by technology

[0004] Existing communication systems such as WiFi, Bluetooth, and ZigBee have short communication distances and cannot provide wide-area coverage

Another cellular wide-area network technology, GSM, 3G and LTE, etc., consumes too much power, costs high, and is not suitable for device interconnection applications

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