KR-102961568-B1 - METHOD AND APPARATUS FOR PERFORMING WIRELESS COMMUNICATION USING REPEATER

KR102961568B1KR 102961568 B1KR102961568 B1KR 102961568B1KR-102961568-B1

Abstract

The present embodiments relate to a method and apparatus for performing wireless communication using repeaters, comprising the steps of: receiving configuration information for a sounding reference signal (SRS) from a base station; transmitting the SRS to the base station in sequential time intervals according to the ON/OFF state of the repeaters based on the configuration information for the SRS; and performing wireless communication with the base station through a repeater determined to be located within the coverage area of a terminal based on the transmitted SRS.

Inventors

김성현
박규진
김성관

Assignees

주식회사 케이티

Dates

Publication Date: 20260507
Application Date: 20230927
Priority Date: 20220928

Claims (20)

In a method for a terminal (user equipment; UE) to perform wireless communication using a repeater, A step of receiving configuration information for a Sounding Reference Signal (SRS) from a base station; Based on the configuration information for the above SRS, the step of transmitting the above SRS to the base station in sequential time intervals according to the ON/OFF status of the repeaters; and A method comprising the step of performing wireless communication with the base station through a repeater determined to be located within the coverage area based on the transmitted SRS.
In Article 1, The above terminal is, A method for determining that a location is within the coverage of the repeaters when the difference between the strength of the SRS received at the base station in the ON state of the repeaters and the strength of the SRS received at the base station in the OFF state of the repeaters is greater than a predetermined threshold value.
In Article 2, The repeater determined to be located within the coverage area of the above terminal is, A method determined based on the strength of the SRS received at the base station when each of the repeaters is sequentially turned on/off when it is determined that the terminal is located within the coverage of the repeaters.
In Article 2, The repeater determined to be located within the coverage area of the above terminal is, When it is determined that the terminal is included in the coverage of the repeaters, a repeater group including the repeater in which the terminal is located within the coverage is determined based on the strength of the SRS received from the base station while each of the plurality of repeater groups in which the repeaters are grouped is sequentially turned on/off, and A method determined based on the strength of the SRS received at the base station while each of the repeaters included in the above-determined repeater group is sequentially turned on/off.
In Article 1, The repeater determined to be located within the coverage area of the above terminal is, A method determined based on the sequence applied to the SRS received at the base station among sequences configured differently for each of the above repeaters.
In a method for a base station to perform wireless communication using a repeater, A step of transmitting configuration information for a Sounding Reference Signal (SRS) to a terminal; Based on configuration information for the above SRS, a step of receiving the above SRS from the terminal in sequential time intervals according to the ON/OFF status of the repeaters; Based on the received SRS, a step of determining a repeater among the repeaters where the terminal is located within coverage; and A method comprising the step of performing wireless communication with the terminal through the determined repeater.
In Article 6, The above terminal is, A method for determining that a location is within the coverage of the repeaters when the difference between the strength of the SRS received in the ON state of the repeaters and the strength of the SRS received in the OFF state of the repeaters is greater than a predetermined threshold value.
In Article 7, A repeater located within the coverage area of the above terminal is, A method determined based on the strength of the SRS received when each of the repeaters is sequentially turned on/off, when it is determined that the terminal is located within the coverage of the repeaters.
In Article 7, A repeater located within the coverage area of the above terminal is, When it is determined that the terminal is included in the coverage of the repeaters, a repeater group including the repeater in which the terminal is located within the coverage is determined based on the strength of the SRS received while each of the plurality of repeater groups in which the repeaters are grouped is sequentially turned on/off, and A method determined based on the strength of the SRS received while each of the repeaters included in the above-determined repeater group is sequentially turned on/off.
In Article 6, A repeater located within the coverage area of the above terminal is, A method determined based on the sequence applied to the received SRS among sequences configured differently for each of the above repeaters.
In a terminal (user equipment; UE) that performs wireless communication using a repeater, Transmitter; Receiver; and It includes a control unit that controls the operation of the transmitting unit and the receiving unit, wherein The above control unit receives configuration information for a Sounding Reference Signal (SRS) from a base station, transmits the SRS to the base station in sequential time intervals according to the ON/OFF state of repeaters based on the configuration information for the SRS, and performs wireless communication with the base station through a repeater determined to be located within the coverage area based on the transmitted SRS.
In Article 11, The above terminal is, A terminal determined to be located within the coverage of the repeaters when the difference between the strength of the SRS received at the base station in the ON state of the repeaters and the strength of the SRS received at the base station in the OFF state of the repeaters is greater than a predetermined threshold value.
In Article 12, The repeater determined to be located within the coverage area of the above terminal is, A terminal determined based on the strength of the SRS received from the base station while each of the repeaters is sequentially turned on/off when it is determined that the terminal is located within the coverage of the repeaters.
In Article 12, The repeater determined to be located within the coverage area of the above terminal is, When it is determined that the terminal is included in the coverage of the repeaters, a repeater group including the repeater in which the terminal is located within the coverage is determined based on the strength of the SRS received from the base station while each of the plurality of repeater groups in which the repeaters are grouped is sequentially turned on/off, and A terminal determined based on the strength of the SRS received at the base station while each of the repeaters included in the above-determined repeater group is sequentially turned on/off.
In Article 11, The repeater determined to be located within the coverage area of the above terminal is, A terminal determined based on the sequence applied to the SRS received at the base station among sequences configured differently for each of the above repeaters.
In a base station that performs wireless communication using a repeater, Transmitter; Receiver; and It includes a control unit that controls the operation of the transmitting unit and the receiving unit, wherein A base station comprising the steps of: the above control unit transmitting configuration information for a Sounding Reference Signal (SRS) to a terminal; receiving the SRS from the terminal in sequential time intervals according to the ON/OFF state of the repeaters based on the configuration information for the SRS; determining a repeater among the repeaters where the terminal is located within the coverage area based on the received SRS; and performing wireless communication with the terminal through the determined repeater.
In Article 16, The above terminal is, A base station determined to be located within the coverage of the repeaters when the difference between the strength of the SRS received in the ON state of the repeaters and the strength of the SRS received in the OFF state of the repeaters is greater than a predetermined threshold value.
In Article 17, A repeater located within the coverage area of the above terminal is, A base station determined based on the strength of the SRS received when each of the repeaters is sequentially turned on/off, when it is determined that the terminal is located within the coverage of the repeaters.
In Article 17, A repeater located within the coverage area of the above terminal is, When it is determined that the terminal is included in the coverage of the repeaters, a repeater group including the repeater in which the terminal is located within the coverage is determined based on the strength of the SRS received while each of the plurality of repeater groups in which the repeaters are grouped is sequentially turned on/off, and A base station determined based on the strength of the SRS received while each of the repeaters included in the above-determined repeater group is sequentially turned on/off.
In Article 16, A repeater located within the coverage area of the above terminal is, A base station determined based on the sequence applied to the received SRS among sequences configured differently for each of the above repeaters.

Description

Method and apparatus for performing wireless communication using a repeater The present embodiments propose a method and apparatus for performing wireless communication using a repeater in a next-generation wireless access network (hereinafter referred to as "NR [New Radio]"). 3GPP recently approved "Study on New Radio Access Technology," a study item for research on next-generation radio access technology (in other words, 5G radio access technology), and based on this, RAN WG1 is currently designing frame structures, channel coding and modulation, and waveforms and multiple access schemes for NR (New Radio). Compared to LTE, NR is required to be designed to satisfy not only improved data transmission rates but also various QoS requirements for detailed and specific usage scenarios. eMBB (enhancement Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communications) have been defined as representative usage scenarios for NR, and a flexible frame structure design compared to LTE is required to satisfy the requirements of each usage scenario. Since each service requirement (usage scenario) has different demands regarding data rates, latency, reliability, and coverage, there is a need for a method to efficiently multiplex wireless resource units based on different numerologies (e.g., subcarrier spacing, subframe, TTI (Transmission Time Interval), etc.) as a way to efficiently satisfy the requirements of each usage scenario through the frequency bands that constitute an arbitrary NR system. As part of this aspect, when applying repeaters to expand wireless coverage in wireless networks, a specific design is required to more efficiently reduce energy consumption. FIG. 1 is a diagram briefly illustrating the structure of an NR wireless communication system to which the present embodiment can be applied. FIG. 2 is a drawing illustrating the frame structure in an NR system to which the present embodiment can be applied. FIG. 3 is a diagram illustrating a resource grid supported by wireless access technology to which the present embodiment can be applied. FIG. 4 is a diagram illustrating the bandwidth part supported by the wireless access technology to which the present embodiment can be applied. FIG. 5 is a diagram illustrating an exemplary synchronization signal block in a wireless access technology to which the present embodiment can be applied. FIG. 6 is a diagram illustrating a random access procedure in a wireless access technology to which the present embodiment can be applied. Figure 7 is a diagram for explaining CORESET. FIG. 8 is a diagram illustrating the control of a relay of wireless signals performed by a repeater between a base station and a terminal according to the embodiments. FIG. 9 is a diagram illustrating a procedure in which a terminal according to one embodiment performs wireless communication using a repeater. FIGS. 10 to 12 are drawings for explaining how a terminal according to the present embodiments determines a repeater located within the coverage area. FIG. 13 is a diagram illustrating a procedure in which a base station according to one embodiment performs wireless communication using a repeater. FIG. 14 is a diagram showing the configuration of a terminal according to another embodiment. FIG. 15 is a diagram showing the configuration of a base station according to another embodiment. Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. In assigning reference numerals to the components of each drawing, the same components may have the same reference numeral as much as possible, even if they are shown in different drawings. Furthermore, in describing the embodiments, if it is determined that a detailed description of related known components or functions may obscure the essence of the technical concept, such detailed description may be omitted. Where terms such as "comprising," "having," or "consisting of" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it may include a plural unless otherwise specified. Additionally, terms such as first, second, A, B, (a), (b), etc., may be used to describe the components of the present disclosure. These terms are used merely to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by such terms. In describing the positional relationship of components, where it is stated that two or more components are "connected," "combined," or "joined," it should be understood that while the two or more components may be directly "connected," "combined," or "joined," they may also be "connected," "combined," or "joined" with other components "intervened." Here, the other components may be included in one or more of the two or more components that are "connected," "combined," or "joined" with