Narrowband Internet of Things wireless transmission method based on interference alignment technology

A narrow-band Internet of Things and wireless transmission technology, applied in the field of wireless communication, can solve the problems of spectrum resource shortage, narrow NB-IoT authorized frequency band, and large number of connections, so as to improve spectrum efficiency and system capacity, reduce transmission delay and terminal Effect of power consumption, broad application prospects

Inactive Publication Date: 2016-11-23
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of narrow NB-IoT licensed frequency band, large number of connections, and tight spectrum resources, the present invention provides an NB-IoT wireless transmission method based on IA technology

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  • Narrowband Internet of Things wireless transmission method based on interference alignment technology
  • Narrowband Internet of Things wireless transmission method based on interference alignment technology

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Embodiment Construction

[0020] The present invention will be further described below with reference to the accompanying drawings and in conjunction with the embodiments.

[0021] A NB-IoT wireless transmission method based on IA technology, the specific execution flow chart is as follows figure 1 shown. Including the following steps:

[0022] Step 1. Build a narrowband Internet of Things wireless transmission system;

[0023] The wireless transmission method of the present invention must be under the control of the central control node (base station, relay node, or main connection node supported by power supply equipment, etc.), to realize cooperative communication of multiple transmission node pairs, so as to improve transmission efficiency and reduce Terminal power consumption: The wireless transmission system includes at least 3 transmission node pairs, that is, there are at least 2*k (k is greater than or equal to 3) transmission nodes, and each transmission node is equipped with two or more an...

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Abstract

The invention provides a narrowband Internet of Things wireless transmission method based on the interference alignment technology and relates to the field of wireless communication. The method includes: a central control node selects transmission node pairs for cooperated transmission; the cooperated-transmission nodes simultaneously transmit frame synchronization signals and orthogonal pilot signals; multiple cooperated-receiving nodes performs synchronization and MIMO channel estimation; the central control node calculates a pre-coding matrix and an interference suppression matrix; the cooperated-transmission nodes uses the pre-coding matrix to transmit pre-coded information in a same-time and same-frequency manner; the cooperated-receiving node uses the interference suppression matrix to correctly receive useful information. The narrowband Internet of Things wireless transmission method has the advantages that same-time and same-frequency information transmission of NB-IoT transmission node pairs is achieved through the central control node and by using the interference alignment technology, system capacity and frequency spectrum efficiency are increased effectively as compared with that of a conventional point-to-point FDD and TDD transmission system, transmission time delay and terminal power consumption are lowered, and the massive link requirement of NB-IoT is satisfied.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a narrowband Internet of Things wireless transmission method based on interference alignment technology multi-point cooperative communication. Background technique [0002] Interference alignment technology (Interference alignment, IA) is an important means to solve the same-frequency interference in wireless communication systems. It can effectively suppress inter-cell interference in the same-frequency networking mode, improve the throughput of users at the edge of the cell, and achieve a linear relationship with the number of users. The degree of freedom gain increases the system capacity. This technology is one of the key implementation technologies of coordinated multi-point transmission proposed by the 3rd Generation Partnership Project (3rdGeneration Partnership Project, 3GPP) in the LTE-A system. [0003] Narrow Band Internet of Things (NB-IoT) is built on c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06H04L27/26
CPCH04B7/0452H04B7/0456H04B7/0626H04L27/2656H04L27/2695Y02D30/70
Inventor 刘允翟立君李宁张晓龙李捷
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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