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Non-orthogonal access method for MTC user clustering in NB-IoT system

An access method, non-orthogonal technology, applied in the direction of machine-to-machine/machine-type communication services, electrical components, wireless communication, etc., to achieve the effect of maximizing the total downlink transmission rate

Active Publication Date: 2021-03-12
STATE GRID JIANGSU ELECTRIC POWER ENG CONSULTING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the NB-IoT system, there is little research work using NOMA technology to increase the number of access users, especially to ensure that MTC users with different quality of service requirements (QoS) access the network in a clustered manner.

Method used

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  • Non-orthogonal access method for MTC user clustering in NB-IoT system
  • Non-orthogonal access method for MTC user clustering in NB-IoT system
  • Non-orthogonal access method for MTC user clustering in NB-IoT system

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Embodiment

[0028] A non-orthogonal access method for clustering MTC users in the NB-IoT system, such as figure 1 As shown, the specific steps are as follows:

[0029] Establish a NOMA downlink NB-IoT communication system based on MTC equipment. The system is equipped with a base station equipped with N antennas to serve K single-antenna users. The users are two types of machine communication (MTC) equipment, including large-scale Machine Type Communications (mMTC) devices and Ultra Reliable Low Speed ​​Communications (URLLCs) devices. mMTC devices need to be decoded before URLLC devices.

[0030] S1. The base station acquires downlink channel information of the user.

[0031] S2. On the premise of satisfying the QoS requirement, perform grouping and clustering according to the average channel gain of the users.

[0032] S3. After grouping, perform power allocation to the users.

[0033] Specifically, in S2, the first stage is URLLC clustering, and the URLLC devices are sorted in desc...

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Abstract

The invention discloses a non-orthogonal access method for MTC (Machine Type Communication) user clustering in an NB-IoT (Narrow Band Internet of Things) system, which is characterized in that MTC devices are allocated to different column groups in an NOMA (Non-Orthogonal Multiple Access) cluster, and are transmitted through the same frequency resource, and users are two types of MTC devices. Thesystem comprises a large-scale machine type communication (MMTC) device and an ultra-reliable low-speed communication (URLLC) device. The method mainly comprises the following steps: (1) a base station acquiring downlink channel information of a user; and (2) grouping according to the channel information of the user on the premise of meeting the QoS requirement. and (3) after grouping, carrying out power distribution on the users. According to the invention, the spectral efficiency of the system can be effectively improved, and the method can be used for data transmission of MTC equipment based on NB-IoT.

Description

technical field [0001] The present invention relates to the technical field of the wireless communication Internet of Things, and in particular to a non-orthogonal access method for clustering MTC users in an NB-IoT system. Background technique [0002] There are three typical usage scenarios for fifth-generation (5G) mobile network services, including enhanced mobile broadband (eMBB), massive machine-type communications (mMTCs), and ultra-reliable low-latency communications (URLLCs). Unlike eMBB, mMTC and URLLC are mainly aimed at IoT services and are considered as two machine-type communications (MTCs) unique to the International Telecommunication Union (ITU). As two important enablers of the Internet of Things, mMTC and URLLC devices have different characteristics. mMTC requires the connectivity of a large number of active low-power devices co-existing in a cell, which transmit small packets with relaxed requirements on the order of seconds or hours. Unlike mMTC, ultra-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/70H04W72/04H04W72/08H04W72/54
CPCH04W4/70H04W72/0453H04W72/0473H04W72/541Y02D30/70
Inventor 许建明陈勇黄涛许奇王小明
Owner STATE GRID JIANGSU ELECTRIC POWER ENG CONSULTING CO LTD
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