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Method for transmitting/receiving signal and channel in narrowband wireless communication system, and apparatus therefor

A wireless communication system and a technology for receiving signals, applied in wireless communication, synchronization devices, transmission systems, etc., can solve problems such as resource shortages, and achieve the effect of minimizing the impact of transmission and reception

Pending Publication Date: 2021-02-26
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Explosive growth in business today has led to resource shortages

Method used

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  • Method for transmitting/receiving signal and channel in narrowband wireless communication system, and apparatus therefor
  • Method for transmitting/receiving signal and channel in narrowband wireless communication system, and apparatus therefor
  • Method for transmitting/receiving signal and channel in narrowband wireless communication system, and apparatus therefor

Examples

Experimental program
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Embodiment 1

[0375]First, in the first embodiment, a method of transmitting information on a channel grid shift that may occur when an NB-IoT system coexists with an NR system will be described.

[0376] In the case of the LTE system, the channel raster may be set to a value of 100 kHz. In case of the LTE system, the UE may sequentially monitor a frequency value equal to an available minimum frequency bandwidth (eg, 6RB, 1.08MHz) at intervals of a channel grid (eg, 100kHz). In the case of the NB-IoT system, the UE can sequentially monitor a frequency value equal to an available minimum frequency bandwidth (1RB, 180kHz) at an interval of a channel grid (for example, 100kHz). For example, in case of NB-IoT system, there may be four channel raster offset values ​​{+2.5kHz, -2.5kHz, +7.5kHz, -7.5kHz}.

[0377] Similarly, for the coexistence of NB-IoT system and enhanced MTC (eMTC) system in NR system, it is necessary to align NRPRB boundaries, and channel raster offset may be generated accord...

Embodiment 2

[0394] In the above first embodiment, the method for coexistence of the NB-IoT system and the NR system in the LTE system without affecting the predefined rules, configurations and / or definitions of the NR system has been described. However, in certain cases, problems may arise that existing NB-IoT UEs (eg, legacy NB-IoT UEs) cannot be supported in an LTE system (eg, a separate indication is required in standalone mode). Therefore, in this embodiment, a method capable of supporting an existing NR-IoT UE in an LTE system in any case will be described.

[0395] The LTE system frequency band can be re-divided, and the NR BS (eg, NR gNB) can be configured to generate NB-IoT signals for existing NB-IoT UEs and NR signals for new NR UEs. In this case, in order to generate NB-IoT signal and NR signal in one inverse fast Fourier transform (IFFT), the NR BS needs to match the subcarrier spacing grids of NB-IoT signal and NR signal.

[0396] When the subcarrier spacing grids do not mat...

Embodiment 3

[0415] Hereinafter, in the present embodiment, a method of transmitting information on a channel grid offset when an eMTC system coexists with an NR system, a method of utilizing remaining resources through a channel grid offset, and the like will be described.

[0416] The methods described below are classified for convenience of description only, and some components of one method may be replaced with some components of another method, or may be combined and applied to each other.

[0417] (method 1)

[0418] In the case of an eMTC system, +10kHz or -10kHz channel grid offset occurs when the NR system bandwidth is configured with an odd number of PRBs (i.e., RBs), and when the NR system bandwidth is configured with an even number of PRBs (i.e. , RB), then the channel raster offset may not occur (ie, channel raster offset = 0 kHz).

[0419] Figure 24 An example of calculating a channel grid offset of an eMTC system when an NR system and an eMTC system coexist is illustrated...

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Abstract

The present specification provides a method for transmitting / receiving a signal and a channel in a narrowband wireless communication system, and an apparatus therefor. Specifically, the method for transmitting / receiving the signal and the channel by a terminal in the narrowband wireless communication system that coexists with other wireless communication systems, comprises the steps of receiving asynchronization signal from a base station on the basis of a predetermined channel raster; receiving, from the base station, the information on a channel raster offset through a physical broadcast channel (PBCH); and performing transmission and reception of the signal and the channel with the base station in a narrowband in which a center frequency is adjusted by applying the channel raster offset, wherein a specific subcarrier of a plurality of subcarriers included in the narrowband may be punctured or rate-matched.

Description

technical field [0001] The present invention relates to a method and device for transmitting and receiving signals and channels in a narrowband wireless communication system. Background technique [0002] Mobile communication systems have been developed to provide voice services while ensuring user activity. However, the coverage of mobile communication systems has been extended to data services as well as voice services. Today, the explosive growth of business has led to a shortage of resources. Therefore, since users want relatively high-speed services, advanced mobile communication systems are required. [0003] Requirements for next-generation mobile communication systems include accommodating explosive data traffic, significantly increasing the transmission rate per user, accommodating a greatly increased number of connected devices, very low end-to-end delay, and high energy efficiency. To this end, studies on various technologies are performed, such as dual connect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W72/04H04W74/08
CPCH04W56/0015H04L5/14H04L5/0023H04L5/0012H04L5/0092H04L5/0048H04L27/2602H04L27/261H04W48/12H04W72/0453H04W72/1273H04W72/23
Inventor 辛硕珉金哉亨金善旭朴昶焕安俊基梁锡喆黄升溪
Owner LG ELECTRONICS INC
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