Frequency calibration method for ultra narrowband Internet of Things (IOT) of radio and television spectrums

Abstract

The invention relates to a frequency calibration method for an ultra narrowband Internet of Things (IOT) of radio and television spectrums. The method includes the steps of detecting and analyzing a channel, dividing the channel into a plurality of sub channels based on frequencies according to a predetermined rule, and multiplexing first control information in the sub channels, the first control information being used to indicate the selection mode of the sub channels according to a predetermined rule and the first control information occupying the sub channels in the middle of the channel. In the invention, second control information is also multiplexed in the sub channels, the second control information is used to indicate a demodulation parameter of data, and the second control information occupies the sub channels at both ends of the channel. The frequency calibration method of the invention can divide the channel into the plurality of sub channels and select the best allocation criterion to select the sub channels, thereby improving the efficiency of information transmission and allowing the rational use of storage space.

Description

technical field [0001] The invention relates to the field of communications, in particular to a method for calibrating the frequency of the ultra-narrowband internet of things in the radio and television spectrum. Background technique [0002] With the continuous development of communication technology, not only the connection between people can be realized, but also the connection between things has become more and more common. The current communication technology used by the Internet of Things is mainly the 2G and 3G networks of mobile operators. The use of 2G and 3G networks requires the terminal to be connected to the base station at any time. This method is not suitable for the Internet of Things, because the terminals of the Internet of Things are not It needs to be connected to the Internet from time to time, and does not need to be turned on regularly. The terminal only needs to be connected to the Internet for data transmission when it needs to send data. The use of...

AI Technical Summary

Problems solved by technology

The current communication technology used by the Internet of Things is mainly the 2G and 3G networks of mobile operators. The use of 2G and 3G networks requires the terminal to be connected to the base station at any time. This method is not suitable for the Internet of Things, because the terminals of the Internet of Things are not It needs to be connected to the Internet from time to time, and does not need to be turned on regularly. The terminal only needs to be connected to the Internet for data transmission when it needs to send data. The use of 2G and 3G networks will not only shorten the service life of the battery in the terminal, but also cause waste of 2G and 3G networks.

In addition, most of the existing spectrum allocation base systems are based on base stations allocating spectrum for terminals. This allocation base system requires strict time and / or frequency synchronization, and the communication protocol is more complicated. Moreover, the spectrum resources of existing mobile cellular networks are becoming more and more scarce. , it is not that there are no spectrum resources available, but that most of the spectrum utilization is low

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