WO2020032613A1

WO2020032613A1 - Method for transmitting and receiving signal in wireless communication system, and device for supporting same

Info

Publication number: WO2020032613A1
Application number: PCT/KR2019/009958
Authority: WO
Inventors: 김영태; 윤석현; 이윤정
Original assignee: 엘지전자 주식회사
Priority date: 2018-08-08
Filing date: 2019-08-08
Publication date: 2020-02-13

Abstract

The present invention relates to a wireless communication system, and specifically provides a communication method comprising the steps of: receiving first hop number information for a first cell from a donor base station; and determining whether to report a quality measurement result for the first cell to a base station on the basis of the first hop number information, wherein the first hop number information includes a first hop number according to the number of relay nodes of the first cell and a first offset value assigned to the first hop number, the relay nodes being located on a path from the donor base station to the terminal, and a device therefor.

Description

Method for transmitting / receiving signal in wireless communication system and apparatus supporting same

The present invention relates to a method and apparatus for use in a wireless communication system, and more particularly, to a method for transmitting and receiving a signal in a next generation communication system and an apparatus supporting the same.

As more communication devices demand greater communication capacity, there is a need for enhanced mobile broadband (eMBB) communication as compared to conventional radio access technology (RAT). In addition, massive machine type communications (mMTC), which connects multiple devices and objects to provide various services anytime and anywhere, is also one of the major issues to be considered in next-generation communication. In addition, a communication system design considering a service / UE that is sensitive to reliability and latency is being discussed. As described above, the introduction of next-generation RAT considering eMBB communication, mMTC, ultra-reliable and low latency communication (URLLC), and the like are discussed, and for convenience, the technology is referred to as NR.

An object of the present invention is to provide a method for transmitting and receiving a signal in a wireless communication system and an apparatus supporting the same.

Technical objects to be achieved in the present invention are not limited to the above-mentioned matters, and other technical problems not mentioned above are provided to those skilled in the art from the embodiments of the present invention to be described below. May be considered.

The present invention provides a method for transmitting and receiving a signal in a wireless communication system and an apparatus supporting the same.

In an aspect of the present invention, in a communication method by a terminal in a wireless communication system, receiving first hop number information for a first cell from a donor base station, and based on the first hop number information And determining whether to report a quality measurement result for the first cell to a base station, wherein the first hop number information is located on a path from the donor base station to the terminal. A communication method is provided that includes a first hop number according to the number of relay nodes and a first offset value assigned to the first hop number.

In one aspect of the present invention, a terminal used in a wireless communication system, comprising a memory and a processor, the processor receives first hop number information for a first cell from a donor base station, Determine whether to report a quality measurement result for the first cell to a base station based on 1 hop number information, wherein the first hop number information is located on a path from the donor base station to the terminal; A terminal is provided that includes a first hop number according to the number of relay nodes in one cell and a first offset value assigned to the first hop number.

Preferably, the method further includes receiving second hop number information for a second cell from the donor base station, wherein the second hop number information is located on the path from the donor base station to the terminal. The second hop number according to the number of relay nodes of the and may include a second offset value given to the second hop number.

The method may include comparing the first result value to which the first offset value is applied to the first hop number and the second result value to which the second offset value is applied to the second hop number. Report the quality measurement result for the second cell to the base station if it is larger than the second result value, and if the first result value is smaller than the second result value, report the quality measurement result for the second cell to the base station. You may not report it.

Preferably, the first hop number information and the second hop number information may be received through a system information block (SIB) or an upper layer signal.

Preferably, the second cell may be a cell neighboring the first cell where the terminal is located.

In addition, the terminal may include an autonomous vehicle.

The above-described aspects of the present invention are merely some of the preferred embodiments of the present invention, and various embodiments in which the technical features of the present invention are reflected will be described in detail below by those skilled in the art. Can be derived and understood.

According to embodiments of the present invention, it is possible to effectively report the quality measurement result in consideration of the number of hops based on the relay node in the next-generation communication system.

According to embodiments of the present invention, in a next generation communication system, a terminal may be connected to a cell having a low number of hops for a relay node.

Effects obtained in the embodiments of the present invention are not limited to the above-mentioned effects, and other effects not mentioned are common knowledge in the technical field to which the present invention belongs from the following description of the embodiments of the present invention. Can be clearly derived and understood by those who have That is, unintended effects of practicing the present invention may also be derived by those skilled in the art from the embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to facilitate understanding of the present invention, and provide embodiments of the present invention together with the detailed description.

FIG. 1 is a diagram illustrating a control plane and a user plane structure of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard.

2 is a diagram for describing physical channels and a signal transmission method using the same.

3 is a diagram illustrating a structure of a radio frame used in an LTE system.

4 is a diagram illustrating a structure of a radio frame based on an NR system.

5 is a diagram illustrating a slot structure of a frame based on an NR system.

FIG. 6 is a diagram illustrating a self-contained slot structure based on the NR system.

FIG. 7 illustrates an abstract hybrid beamforming structure from the perspective of a transceiver unit (TXRU) and a physical antenna.

8 illustrates a beam sweeping operation for a synchronization signal and system information during downlink transmission.

9 illustrates a cell of a new radio access technology (NR) system.

10 to 11 illustrate a signal transmission and reception method according to an embodiment of the present invention.

12 illustrates a communication system applied to the present invention.

13 illustrates a wireless device that can be applied to the present invention.

14 illustrates another example of a wireless device that can be applied to the present invention.

15 illustrates a vehicle or autonomous vehicle that can be applied to the present invention.

The following embodiments combine the components and features of the present invention in a predetermined form. Each component or feature may be considered to be optional unless otherwise stated. Each component or feature may be embodied in a form that is not combined with other components or features. In addition, some of the components and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.

In the present specification, embodiments of the present invention have been described based on data transmission / reception relations between a base station and a mobile station. Here, the base station is meant as a terminal node of a network that directly communicates with a mobile station. Certain operations described as performed by the base station in this document may be performed by an upper node of the base station in some cases.

That is, various operations performed for communication with a mobile station in a network consisting of a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station. In this case, the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), a gNode B (gNB), an advanced base station (ABS), or an access point. Can be. In addition, in the present specification, the name of a base station may be used as a generic term including a remote radio head (RRH), an eNB, a transmission point (TP), a reception point (RP), a relay, and the like.

Further, in embodiments of the present invention, a terminal may be a user equipment (UE), a mobile station (MS), a subscriber station (SS), a mobile subscriber station (MSS), It may be replaced with terms such as a mobile terminal or an advanced mobile station (AMS).

In addition, the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service, and the receiving end refers to a fixed and / or mobile node that receives a data service or a voice service. Therefore, in uplink, a mobile station may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a mobile station may be a receiving end and a base station may be a transmitting end.

The following techniques may include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. It can be used in various radio access systems.

CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), or the like.

UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink. LTE-Advanced / LTE-A pro is an evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolution of 3GPP LTE / LTE-A / LTE-A pro.

For clarity, the description will be based on 3GPP communication systems (eg, LTE, NR), but the technical spirit of the present invention is not limited thereto.

The 3GPP based communication standard provides downlink physical channels corresponding to resource elements carrying information originating from a higher layer, and downlink corresponding to resource elements used by the physical layer but not carrying information originating from an upper layer. Physical signals are defined. For example, a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical multicast channel (PMCH), a physical control format indicator channel (physical control) format indicator channel (PCFICH), physical downlink control channel (PDCCH) and physical hybrid ARQ indicator channel (PHICH) are defined as downlink physical channels, reference signal and synchronization signal Is defined as downlink physical signals. A reference signal (RS), also referred to as a pilot, refers to a signal of a predefined special waveform that the gNB and the UE know from each other. For example, a cell specific RS, UE- UE-specific RS, positioning RS (PRS), and channel state information RS (CSI-RS) are defined as downlink reference signals. The 3GPP LTE / LTE-A standard corresponds to uplink physical channels corresponding to resource elements carrying information originating from an upper layer and resource elements used by the physical layer but not carrying information originating from an upper layer. Uplink physical signals are defined. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are used as uplink physical channels. A demodulation reference signal (DMRS) for uplink control / data signals and a sounding reference signal (SRS) used for uplink channel measurement are defined.

In the present invention, Physical Downlink Control CHannel (PDCCH) / Physical Control Format Indicator CHannel (PCFICH) / PHICH (Physical Hybrid automatic retransmit request Indicator CHannel) / PDSCH (Physical Downlink Shared CHannel) are respectively DCI (Downlink Control Information) / CFI ( Control Format Indicator) / Downlink ACK / NACK (ACKnowlegement / Negative ACK) / Downlink Means a set of time-frequency resources or a set of resource elements, and also includes PUCCH (Physical Uplink Control CHannel) / PUSCH (Physical Uplink Shared CHannel / PACH (Physical Random Access CHannel) means a set of time-frequency resources or a set of resource elements that carry Uplink Control Information (UCI) / Uplink Data / Random Access signals, respectively. PDCCH / PCFICH / PHICH / PDSCH / PUCCH / PUSCH / PRACH RE or time-frequency resource or resource element (RE) assigned to or belonging to PDCCH / PCFICH / PHICH / PDSCH / PUCCH / PUSCH / PRACH, respectively. The PDCCH / PCFICH / PHICH / PDSCH / PUCCH / PUSCH / PRACH resource is referred to below: The expression that the user equipment transmits the PUCCH / PUSCH / PRACH is hereinafter referred to as uplink control information / uplink on or through PUSCH / PUCCH / PRACH, respectively. It is used in the same sense as transmitting data / random access signal, and the expression that the gNB transmits PDCCH / PCFICH / PHICH / PDSCH is used for downlink data / control information on or through PDCCH / PCFICH / PHICH / PDSCH, respectively. It is used in the same sense as sending it.

Hereinafter, an OFDM symbol / subcarrier / RE to which CRS / DMRS / CSI-RS / SRS / UE-RS is assigned or configured is configured as CRS / DMRS / CSI-RS / SRS / UE-RS symbol / carrier. It is called / subcarrier / RE. For example, an OFDM symbol assigned or configured with a tracking RS (TRS) is referred to as a TRS symbol, and a subcarrier assigned or configured with a TRS is called a TRS subcarrier and is assigned a TRS. Alternatively, the configured RE is called a TRS RE. In addition, a subframe configured for TRS transmission is called a TRS subframe. Also, a subframe in which the broadcast signal is transmitted is called a broadcast subframe or a PBCH subframe, and a subframe in which a sync signal (for example, PSS and / or SSS) is transmitted is a sync signal subframe or a PSS / SSS subframe. It is called. OFDM symbols / subcarriers / RE to which PSS / SSS is assigned or configured are referred to as PSS / SSS symbols / subcarriers / RE, respectively.

In the present invention, the CRS port, the UE-RS port, the CSI-RS port, and the TRS port are each an antenna port configured to transmit CRS, an antenna port configured to transmit UE-RS, An antenna port configured to transmit CSI-RS and an antenna port configured to transmit TRS. Antenna ports configured to transmit CRSs can be distinguished from each other by the location of REs occupied by the CRS according to the CRS ports, and antenna ports configured to transmit UE-RSs The antenna ports configured to transmit CSI-RSs may be distinguished from each other by the positions of REs occupied by the UE-RSs according to the -RS ports, and the CSI-RSs occupy The location of the REs can be distinguished from each other. Therefore, the term CRS / UE-RS / CSI-RS / TRS port may be used as a term for a pattern of REs occupied by CRS / UE-RS / CSI-RS / TRS in a certain resource region.

FIG. 1 is a diagram illustrating a control plane and a user plane structure of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard. The control plane refers to a path through which control messages used by a user equipment (UE) and a network to manage a call are transmitted. The user plane refers to a path through which data generated at an application layer, for example, voice data or Internet packet data, is transmitted.

The physical layer, which is the first layer, provides an information transfer service to an upper layer by using a physical channel. The physical layer is connected to the upper layer of the medium access control layer through a trans port channel. Data moves between the medium access control layer and the physical layer through the transmission channel. Data moves between the physical layer between the transmitting side and the receiving side through the physical channel. The physical channel utilizes time and frequency as radio resources. In detail, the physical channel is modulated in an Orthogonal Frequency Division Multiple Access (OFDMA) scheme in downlink, and modulated in a Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme in uplink.

The medium access control (MAC) layer of the second layer provides a service to a radio link control (RLC) layer, which is a higher layer, through a logical channel. The RLC layer of the second layer supports reliable data transmission. The function of the RLC layer may be implemented as a functional block inside the MAC. The Packet Data Convergence Protocol (PDCP) layer of the second layer performs a header compression function to reduce unnecessary control information in order to efficiently transmit IP packets such as IPv4 or IPv6 in a narrow bandwidth wireless interface.

The radio resource control (RRC) layer located at the bottom of the third layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transmission channels, and physical channels in connection with configuration, reconfiguration, and release of radio bearers. The radio bearer refers to a service provided by the second layer for data transmission between the terminal and the network. To this end, the RRC layers of the UE and the network exchange RRC messages with each other. If there is an RRC connection (RRC Connected) between the UE and the RRC layer of the network, the UE is in an RRC connected mode, otherwise it is in an RRC idle mode. The non-access stratum (NAS) layer above the RRC layer performs functions such as session management and mobility management.

The downlink transmission channel for transmitting data from the network to the UE includes a broadcast channel (BCH) for transmitting system information, a paging channel (PCH) for transmitting a paging message, and a shared channel (SCH) for transmitting user traffic or a control message. have. Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH). Meanwhile, the uplink transmission channel for transmitting data from the terminal to the network includes a random access channel (RAC) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or a control message. Above the transmission channel, the logical channel mapped to the transmission channel includes a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), and an MTCH (multicast). Traffic Channel).

2 is a diagram for explaining physical channels and a general signal transmission method used in a 3GPP system.

In a wireless communication system, a terminal receives information through a downlink (DL) from a base station, and the terminal transmits information through an uplink (UL) to the base station. The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type / use of the information transmitted and received.

When the power is turned off while the power is turned off, or a new terminal enters a cell, an initial cell search operation such as synchronization with a base station is performed (S11). To this end, the UE may receive a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH) from a base station through a Synchronization Signal Block (SSB) block. The terminal receives the PSS and the SSS, synchronizes with the base station, and acquires information such as a cell identity. In addition, the terminal may receive the PBCH from the base station to obtain broadcast information in the cell. In addition, the UE may check the downlink channel state by receiving a DL RS (Downlink Reference Signal) in the initial cell search step.

After completing the initial cell search, the UE may obtain more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) corresponding thereto (S12).

Thereafter, the terminal may perform a random access procedure (S13 to S16) to complete the access to the base station. In more detail, the UE may transmit a preamble through a physical random access channel (PRACH) (S13), and may receive a random access response (RAR) for the preamble through a PDCCH and a PDSCH corresponding thereto (S14). . Thereafter, the UE may transmit a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15) and perform a contention resolution procedure such as a PDCCH and a PDSCH corresponding thereto (S16).

After performing the above procedure, the UE may perform PDCCH / PDSCH reception (S17) and PUSCH / PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink / downlink signal transmission procedure. Control information transmitted from the terminal to the base station is referred to as uplink control information (UCI). UCI includes Hybrid Automatic Repeat and reQuest Acknowledgment / Negative-ACK (HARQ ACK / NACK), Scheduling Request (SR), Channel State Information (CSI), and the like. The CSI includes a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Rank Indication (RI), and the like. The UCI is generally transmitted through the PUCCH, but may be transmitted through the PUSCH when control information and data should be transmitted at the same time. In addition, the UE may transmit the UCI aperiodically through the PUSCH according to the request / instruction of the network.

3 is a diagram illustrating a structure of a radio frame used in an LTE system.

Referring to FIG. 3, a radio frame has a length of 10 ms (327200 × Ts) and consists of 10 equally sized subframes. Each subframe has a length of 1 ms and consists of two slots. Each slot has a length of 0.5 ms (15360 x Ts). Here, Ts represents a sampling time and is represented by Ts = 1 / (15 kHz x 2048) = 3.2552 x 10 ^-8 (about 33 ns). The slot includes a plurality of OFDM symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain. In the LTE system, one resource block includes 12 subcarriers x 7 (6) OFDM symbols. Transmission time interval (TTI), which is a unit time for transmitting data, may be determined in units of one or more subframes. The structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of OFDM symbols included in the slot may be variously changed.

4 illustrates the structure of a radio frame used in NR.

In NR, uplink and downlink transmission are composed of frames. One radio frame has a length of 10 ms and is defined as two 5 ms half-frames (HFs). One half-frame is defined as five 1 ms subframes (SFs). One subframe is divided into one or more slots, and the number of slots in the subframe depends on subcarrier spacing (SCS). Each slot includes 12 or 14 OFDM (A) symbols according to a cyclic prefix (CP). Usually when CP is used, each slot contains 14 symbols. If extended CP is used, each slot includes 12 symbols. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or DFT-s-OFDM symbol).

In the NR system, OFDM (A) numerology (eg, SCS, CP length, etc.) may be set differently among a plurality of cells merged into one UE. Accordingly, the (absolute time) section of a time resource (eg, SF, slot, or TTI) (commonly referred to as a time unit (TU) for convenience) composed of the same number of symbols may be set differently between merged cells.

5 illustrates a slot structure of an NR frame. One slot includes a plurality of symbols in the time domain. For example, in general, one slot includes 14 symbols in case of CP, but one slot includes 12 symbols in case of extended CP. The carrier includes a plurality of subcarriers in the frequency domain. Resource block (RB) is defined as a plurality of consecutive subcarriers (eg, 12) in the frequency domain. A bandwidth part (BWP) is defined as a plurality of consecutive (P) RBs in the frequency domain and may correspond to one numerology (eg, SCS, CP length, etc.). The carrier may include up to N (eg 5) BWPs. Data communication is performed through an activated BWP, and only one BWP may be activated by one UE. Each element in the resource grid is referred to as a resource element (RE), one complex symbol may be mapped.

6 shows the structure of a self-contained slot based on the NR system.

In an NR system, a frame is characterized by a self-complete structure in which all of a DL control channel, DL or UL data, UL control channel, etc. may be included in one slot. For example, the first N symbols in a slot may be used to transmit a DL control channel (hereinafter DL control region), and the last M symbols in the slot may be used to transmit a UL control channel (hereinafter UL control region). N and M are each an integer of 0 or more. A resource region (hereinafter, referred to as a data region) between the DL control region and the UL control region may be used for DL data transmission, or may be used for UL data transmission. There may be a time gap for DL-to-UL or UL-to-DL switching between the control region and the data region. For example, the following configuration may be considered. Each interval is listed in chronological order.

1.DL only configuration

2. UL only configuration

3. Mixed UL-DL composition

DL area + Guard Period (GP) + UL control area

DL control area + GP + UL area

DL area: (i) DL data area, (ii) DL control area + DL data area

UL region: (i) UL data region, (ii) UL data region + UL control region

The PDCCH may be transmitted in the DL control region, and the PDSCH may be transmitted in the DL data region. PUCCH may be transmitted in the UL control region, and PUSCH may be transmitted in the UL data region. Downlink Control Information (DCI), for example, DL data scheduling information, UL data scheduling information, and the like may be transmitted in the PDCCH. In PUCCH, uplink control information (UCI), for example, positive acknowledgment / negative acknowledgment (ACK / NACK) information, channel state information (CSI) information, and scheduling request (SR) for DL data may be transmitted. The GP provides a time gap in the process of the base station and the terminal switching from the transmission mode to the reception mode or from the reception mode to the transmission mode. Some symbols at the time of switching from DL to UL in the subframe may be set to GP.

On the other hand, the NR system considers using a high frequency band, that is, a millimeter frequency band of 6 GHz or more to transmit data while maintaining a high data rate to a large number of users using a wide frequency band. 3GPP uses this as the name NR, which is referred to as NR system in the present invention. However, the millimeter frequency band has a frequency characteristic that the signal attenuation with the distance is very rapid due to the use of a frequency band too high. Therefore, NR systems using bands of at least 6 GHz or more narrow beams that solve the problem of reduced coverage due to abrupt propagation attenuation by gathering and transmitting energy in a specific direction rather than omnidirectionally to compensate for abrupt propagation characteristics. narrow beam) transmission scheme. However, when only one narrow beam is used for service, since a base station narrows the service range, the base station collects a plurality of narrow beams to serve a broadband service.

In the millimeter frequency band, that is, the millimeter wave (mmW) band, the wavelength is shortened to allow the installation of a plurality of antenna elements in the same area. For example, in a 30 GHz band with a wavelength of about 1 cm, a total of 100 antenna elements can be installed in a two-dimension arrangement in a 0.5 lambda (wavelength) interval on a panel of 5 by 5 cm. Do. Therefore, in mmW, it is considered to use a plurality of antenna elements to increase the beamforming gain to increase coverage or to increase throughput.

As a method for forming a narrow beam in the millimeter frequency band, a beamforming scheme in which a base station or a UE transmits the same signal using a phase difference appropriate to a large number of antennas is mainly considered. Such beamforming schemes include digital beamforming that creates a phase difference in a digital baseband signal, analog beamforming that creates a phase difference using a time delay (ie, cyclic shift) in a modulated analog signal, digital beamforming, and an analog beam. Hybrid beamforming using all of the foaming. Having a transceiver unit (TXRU) to enable transmission power and phase adjustment for each antenna element enables independent beamforming for each frequency resource. However, there is a problem in that it is not effective in terms of price to install TXRU in all 100 antenna elements. In other words, the millimeter frequency band should be used by a large number of antennas to compensate for rapid propagation attenuation, and digital beamforming is equivalent to the number of antennas. Since an amplifier (power amplifier, linear amplifier, etc.) is required, the implementation of digital beamforming in the millimeter frequency band has a problem of increasing the cost of communication equipment. Therefore, when a large number of antennas are required, such as the millimeter frequency band, the use of analog beamforming or hybrid beamforming is considered. The analog beamforming method maps a plurality of antenna elements to one TXRU and adjusts the beam direction with an analog phase shifter. Such an analog beamforming method has a disadvantage in that only one beam direction can be made in the entire band so that frequency selective beamforming (BF) cannot be performed. Hybrid BF is an intermediate form between digital BF and analog BF, with B TXRUs, which is fewer than Q antenna elements. In the case of the hybrid BF, although there are differences depending on the connection method of the B TXRU and the Q antenna elements, the direction of beams that can be transmitted simultaneously is limited to B or less.

As mentioned above, digital beamforming processes the digital baseband signal to be transmitted or received, so that multiple beams can be used to transmit or receive signals simultaneously in multiple directions, while analog beamforming can transmit or receive signals. Since the beamforming is performed in a modulated state of the received analog signal, the signal cannot be simultaneously transmitted or received in multiple directions beyond the range covered by one beam. In general, a base station communicates with a plurality of users at the same time by using broadband transmission or multiple antenna characteristics. When a base station uses analog or hybrid beamforming and forms an analog beam in one beam direction, it is because of the characteristics of analog beamforming. Only users within the same analog beam direction can communicate. The RACH resource allocation and resource utilization scheme of the base station according to the present invention to be described later is proposed to reflect the constraints caused by the analog beamforming or hybrid beamforming characteristics.

When multiple antennas are used, a hybrid beamforming technique that combines digital beamforming and analog beamforming has emerged. In this case, analog beamforming (or RF beamforming) refers to an operation in which a transceiver (or RF unit) performs precoding (or combining). In hard-brid beamforming, the baseband unit and transceiver (or RF unit) perform precoding (or combining), respectively, resulting in the number of RF chains and the D / A (or A / D) converter. There is an advantage that the performance can be close to the digital beamforming while reducing the number of. For convenience, the hybrid beamforming structure may be represented by N TXRUs and M physical antennas. The digital beamforming for the L data layers to be transmitted at the transmitting end can be represented by an N-by-L matrix, and then the converted N digital signals are converted into analog signals via TXRU and then into an M-by-N matrix. The expressed analog beamforming is applied.

In FIG. 7, the number of digital beams is L, and the number of analog beams is N. In FIG. Furthermore, in the NR system, the base station is designed to change the analog beamforming on a symbol basis, so that a direction for supporting more efficient beamforming for a UE located in a specific area is being considered. Furthermore, when N TXRUs and M RF antennas are defined as one antenna panel, a method of introducing a plurality of antenna panels to which hybrid beamforming independent of each other is applicable in an NR system is also considered. As such, when the base station utilizes a plurality of analog beams, analog beams advantageous for signal reception may be different for each UE, and thus, the base station is applied to at least a synchronization signal, system information, and paging in a specific slot or subframe (SF). A beam sweeping operation is considered in which a plurality of analog beams to be changed symbol by symbol so that all UEs have a reception opportunity.

8 is a diagram illustrating a beam sweeping operation for a synchronization signal and system information in downlink transmission.

In FIG. 8, a physical resource or a physical channel through which system information of the New RAT system is broadcasted is referred to as a physical broadcast channel (xPBCH). In this case, analog beams belonging to different antenna panels may be simultaneously transmitted in one symbol, and in order to measure a channel for each analog beam, as shown in FIG. A method of introducing Beam RS (BRS), which is a reference signal (RS) transmitted for a single analog beam, has been discussed. The BRS may be defined for a plurality of antenna ports, and each antenna port of the BRS may correspond to a single analog beam. In this case, unlike the BRS, a synchronization signal or a xPBCH may be transmitted for all the analog beams included in the analog beam group so that any UE can receive them well.

9 illustrates a cell of a new radio access technology (NR) system.

Referring to FIG. 9, in the NR system, a method in which a plurality of TRPs constitute one cell is discussed, unlike one base station forming one cell in a conventional wireless communication system such as LTE. If the cell is configured, even if the TRP serving the UE is changed, seamless communication is possible, and thus there is an advantage in that mobility management of the UE is easy.

In the LTE / LTE-A system, PSS / SSS is transmitted omni-direction, whereas signals such as PSS / SSS / PBCH are rotated omg-directionally by the gNB applying mmWave. A method of beamforming and transmitting the beam is considered. As described above, transmitting / receiving signals while rotating the beam direction is referred to as beam sweeping or beam scanning. In the present invention, "beam sweeping" refers to transmitter side behavior, and "beam scanning" refers to receiver side behavior. For example, assuming that the gNB can have up to N beam directions, signals such as PSS / SSS / PBCH are transmitted for the N beam directions, respectively. That is, the gNB transmits synchronization signals such as PSS / SSS / PBCH for each direction while sweeping directions that it may have or support. Alternatively, when the gNB can form N beams, several beams may be bundled into one beam group, and PSS / SSS / PBCH may be transmitted / received for each beam group. At this time, one beam group includes one or more beams. A signal such as PSS / SSS / PBCH transmitted in the same direction may be defined as one SS block, and a plurality of SS blocks may exist in one cell. When there are a plurality of SS blocks, an SS block index may be used to distinguish each SS block. For example, if PSS / SSS / PBCH is transmitted in 10 beam directions in one system, PSS / SSS / PBCH in the same direction may constitute one SS block, and in the system, 10 SS blocks It can be understood to exist. In the present invention, the beam index may be interpreted as an SS block index.

The SSB (Synchronization Signal Block) is composed of SS / PBCH blocks and is periodically transmitted according to SSB periods.

UE acquires DL synchronization based on SSB (eg, OFDM symbol / slot / half-frame boundary detection), cell ID (eg, Physical Cell Identifier, PCID) acquisition, beam alignment for initial access, MIB acquisition, DL measurement and the like can be performed.

Currently, 3GPP Rel. 16, that is, the standardization of the NR system is discussing relay base stations for the purpose of supplementing coverage holes and reducing wired connections between base stations. This is called integrated access and backhaul (IAB), and donor base stations (donor gNB, DgNB) transmit signals to the terminal through a relay base station (relay node), and wireless backhaul for communication between the donor base station and the relay base station or relay base station. A link (wireless backhaul link) and an access link for communication between a donor base station and a terminal or between a relay base station and a terminal.

The present invention is a method of reflecting a value according to the number of relay hops when reporting radio resource measurement (RRM) by event triggering in an IAB environment. For example, more weight is given to relays (relay nodes) with fewer hops. Accordingly, the present invention seeks to reduce signaling overhead of wireless backhaul as a whole by allowing relays having a small number of hops to be more reflected in the cell configuration of the terminal.

In a wireless relay environment, the amount of information to be relayed increases linearly with the number of hops. For example, if a terminal needs to relay a certain amount of information (eg, A amount) once using wireless backhaul when the terminal is attached to a single hop relay, the terminal is connected to a three-hop relay. In that case, A information must be relayed three times. Therefore, as the number of hops increases, the amount of resources of the wireless backhaul to be used increases, thereby increasing the interference of resources in the wireless backhaul.

In order to solve the above problem, the following method can be considered.

1. In RRM, a cell which is a relay base station reflects the number of relay hops in the RRM.

Specifically, the RRM has two forms in NR. One is event triggering, and the other is reporting the measurement results periodically. In the case of periodic reporting, the network may reflect the number of relay hops in the RRM measurement value reported by the cell ID and reflect the result in cell configuration or handover of the UE. In the event triggering scheme, when a specific event is triggered, the network may reflect the number of relay hops in the RRM measurement value reported by the cell ID and reflect the same in cell configuration or handover as in periodic reporting.

On the other hand, in the event triggering scheme, as the UE specifies specific events in order not to feed back unnecessary measurement values, the network considering the cell configuration considering the relay hop number has a relay hop count only when the event is triggered during RRM. It is necessary to operate to make the calculation in consideration of the feedback, so as not to feed back unnecessary measurement values.

Rel.15 NR standardization specifies six event triggering in TS 38.331: In each of the six events below, an entering condition is a condition of putting a serving cell or a neighboring cell into a measurement reporting target list. The removing condition is a condition of subtracting the serving cell or the neighboring cell from the measurement report target list.

References 1 to 6 below represent six event triggerings.

[Reference 1]

[Reference 2]

[Reference 3]

[Reference 4]

[Reference 5]

[Reference 6]

In Event A1 of [Reference 1], condition A1-1 reports the situation from the point of view of improving the condition (eg, RSRP, RSRQ, SINR) of adding a serving cell to the list of serving cells to report the measurement result. Meaning). A1-1 has a margin of Hys and means that the serving cell is added to the cell list when the measurement result of the serving cell is higher than the threshold value. This condition is a formula that does not reflect the number of relay hops.

2.

In formula 2, RH means the number of relay hops. Here, the number of relay hops may refer to the number of hops according to the number of relay nodes (eg, IAB nodes) existing on the path from the donor base station to the terminal. The number of relay hops may be specified in a residual minimum SI (eg, system information block (SIB)) or may be reported per cell (or measurement objective specific) through measObjectNR, which is RRC signaling information. For reference, essential system information necessary for the UE to access the network in the NR system is referred to as minimum system information (minimum SI, Min.SI). The remaining Min.SI is RMSI. measObjectNR is information transmitted through RRC signaling and may specify information related to measurement. When the relay hop number is informed by the RMSI, the UE must decode the SS block, but when the measObjectNR is informed, the relay hop number can be known without the SS block decoding. In Equation 2, the delta value is a weight value according to the number of relay hops. The delta value may be specified in the RMSI or may be informed for each cell through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the weight value can be known without SS block decoding. Equation 2 has the effect of arbitrarily lowering the RRM measurement result according to the number of relay hops. Cells with a larger number of relay hops are intentionally unsuitable for connection / attachment of the UE (that is, the larger the number of relay hops, the harder it is to satisfy equation 2). Equation 2 is intended to allow the terminal to attach / enter a cell with a small number of relay hops.

Event A1-2 in [Reference 1] is a condition for removing a serving cell from the list of serving cells to which the measurement result is to be reported (meaning reporting the situation in terms of improving the quality of the serving cell (eg, RSRP, RSRQ, SINR)). With a margin of hys, it means that the serving cell is removed when the measurement result of the serving cell is lower than the threshold value (Thresh). A1-2 is a formula that does not reflect the number of relay hops.

3.

In Equation 3, RH means the number of relay hops, and can be indicated in each cell through measObjectNR, which is specified in the RMSI or RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the number of relay hops can be known without SS block decoding. In Equation 3, the delta value is a weight value according to the number of relay hops and may be specified in the RMSI, or may be informed for each cell (or to be measured specifically) through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the weight value can be known without SS block decoding. Equation 3 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that a cell having a large number of relay hops is not intentionally suitable for connection / entry of the UE, so that the UE is located in a cell having a small number of relay hops. The intention is to stick / enter.

Event A2-1 of [Reference 2] is a condition for adding a serving cell to the list of serving cells to which the measurement result is to be reported (meaning reporting a situation in terms of deteriorating the quality of the serving cell (eg, RSRP, RSRQ, SINR)). to be. A2-1 has a margin of Hys, and means that the serving cell is added to the serving cell list when the measurement result of the serving cell is lower than the threshold value (Thresh). If this condition is reflected as a formula without relay hop count, it is as follows.

4.

In Equation 4, RH means the number of relay hops, and the number of relay hops may be specified in the RMSI, or may be informed for each cell (or specific to measurement) through measObjectNR, which is RRC signaling information. If informed by the RMSI, the UE must decode the SS block, but if informed via measObjectNR, the number of relay hops can be known without SS block decoding. In Equation 4, the delta value is a weight value according to the number of relay hops and may be specified in the RMSI or may be informed for each cell through RRC signaling information measObjectNR. If informed by the RMSI, the UE must decode the SS block, but when informed via measObjectNR, the UE can know the weight value without decoding the SS block. Equation 4 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that a cell having a larger number of relay hops is intentionally unsuitable for connection / attachment of the terminal, so that the number of relay hops There is an intention to have a terminal attach / enter a small cell.

In [Reference 2], event A2-2 is a condition of removing a serving cell from the list of serving cells to which the measurement result is to be reported (meaning reporting a situation in terms of poor quality of the serving cell (eg, RSRP, RSRQ, SINR)). With a margin of Hys, when the measurement result of the serving cell is higher than the threshold value, it means that the serving cell is removed from the serving cell list. If this condition is reflected as a formula without relay hop count, it is as follows.

5.

In Equation 5, RH means the number of relay hops and can be indicated in each cell through measObjectNR, which is specified in the RMSI or RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed via measObjectNR, the number of relay hops can be known without SS block decoding. In Equation 5, the delta value is a weight value according to the number of relay hops and may be specified in the RMSI, or may be informed for each cell (or to be measured specifically) through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed via measObjectNR, the UE can know the weight value without decoding the SS block. Equation 5 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that cells with a larger number of relay hops are intentionally unsuitable for connection / attachment of the terminal, so that the number of relay hops There is an intention to have a terminal attach / enter a small cell.

In [Reference 3], event A3-1 has a margin of Hys as a condition of adding a neighboring cell to the cell list to report the measurement result, and the neighboring when the measurement result of the neighboring cell is higher than the measurement result of SpCell (special cell). This means adding a cell to the cell list. In the formula, Ocn and Ocp are cell specific offset values for neighbor cells and SpCell, respectively. Ofn and Ofp are measurement objective specific offset values (frequency specific values) for neighbor cells and SpCell, respectively. The same frequency has the same value), and Off can be regarded as an event specific offset value. If this condition is reflected as a formula without relay hop count, it is as follows.

6.

In Equation 6, RHn and RHp represent relay hop numbers of neighbor cells and SpCell, respectively. The number of relay hops may be specified in the RMSI or may be reported for each cell through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed via measObjectNR, the UE can know the number of relay hops without SS block decoding. In Equation 6, deltan and deltap values are weighted values based on the number of relay hops of neighboring cells and SpCell, respectively, and can be specified in the RMSI or informed for each cell (or measurement specific) through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed via measObjectNR, the UE can know the weight value without SS block decoding. In Equation 6, the values of deltan and deltap are weighted values for the number of relay hops and can be operated so that only one value can be signaled. Equation 6 has the effect of arbitrarily lowering the RRM measurement result value according to the number of relay hops, so that the larger the number of relay hops, the more intentionally unsuitable for connection / attachment of the terminal, the terminal in the cell with fewer relay hops There is an intention to make this stick / enter.

Event A3-2 of [Reference 3] sets Hys as a condition that removes the neighboring cell from the cell list to which the measurement result is to be reported. It is meant to be removed from. In the formula, Ocn and Ocp are cell-specific offset values for neighboring cells and SpCell, respectively, Ofn and Ofp are measurement specific offset values (frequency-specific values with the same value for the same frequency) for neighboring cells and SpCell, respectively. , Off can be seen as an event specific offset value. If this condition is reflected as a formula without relay hop count, it is as follows.

7.

In Equation 7, RHn and RHp respectively represent the number of relay hops of neighboring cells and SpCell, and can be specified in the RMSI or informed for each cell through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed via measObjectNR, the number of relay hops can be known without SS block decoding. In Equation 7, deltan and deltap values are weighted values based on the number of relay hops of neighboring cells and SpCell, respectively, and can be specified in the RMSI or informed for each cell (or measurement specific) through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. In Equation 7, deltan and deltap can be operated to signal only one value assuming the same value as the weight value for the number of relay hops. Equation 7 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops.As a cell having a large number of relay hops, the number of relay hops is intentionally unsuitable for the connection / attachment of the terminal. The intention is to make the terminal stick to a small cell.

In the above event A4-1, the condition of adding the neighboring cell to the cell list to report the measurement result is set to the margin of Hys in the formula, and when the measurement result of the neighboring cell is higher than the threshold value (Thresh) It is meant to be added. In the formula, Ocn is a cell specific offset value for a neighboring cell, and Ofn is a measurement target specific offset value for a neighboring cell (a frequency specific value having the same value for the same frequency). If this condition is reflected as a formula without relay hop count, it is as follows.

8.

In Equation 8, RH means the number of relay hops and can be indicated in each cell through the measObjectNR, which is specified in the RMSI or RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. The delta value in Equation 8 may be specified in the RMSI as a weight value according to the number of relay hops, or may be informed for each cell (or measurement object specific) in measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the weight value without SS block decoding. Equation 8 has the effect of arbitrarily lowering the RRM measurement result value according to the number of relay hops, so that a cell with a large number of relay hops is intentionally unsuitable for connection / attachment of the terminal, and thus the terminal in a cell with a small number of relay hops I have an intention to make this stick.

In the event A4-2, the margin of Hys is set as a condition of removing the neighbor cell from the cell list to which the measurement result is to be reported, and the neighbor cell is removed from the cell list when the measurement result of the neighbor cell is lower than the threshold value. It makes sense. In the formula, Ocn is a cell specific offset value for a neighboring cell, and Ofn is a measurement target specific offset value for a neighboring cell (a frequency specific value having the same value for the same frequency). If this condition is reflected as a formula without relay hop count, it is as follows.

9.

In Equation 9, RH means the number of relay hops and can be indicated in each cell through measObjectNR, which is specified in the RMSI or RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. In Equation 9, the delta value may be specified in the RMSI as a weight value according to the number of relay hops, or may be informed for each cell (or to be specifically measured) in the RRC signaling information measObjectNR. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. Equation 9 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that cells with a large number of relay hops are intentionally unsuitable for terminal connection / attachment, so that the number of relay hops is small. The intention is to make the terminal stick.

The events A5-1 and A5-2 above must satisfy both the formulas of A5-1 and A5-2 as a condition of adding a neighbor cell to the cell list to report the measurement result. With a margin of Hys, if SpCell's measurement result is smaller than Threshold 1 (Thresh 1) and the neighbor cell's measurement is larger than Threshold 2 (Thresh 2), it means adding a neighbor cell to the cell list. In the formula, Ocn is a cell specific offset value for a neighboring cell, and Ofn is a measurement target specific offset value for a neighboring cell (a frequency specific value having the same value for the same frequency). If this condition is reflected as a formula without relay hop count, it is as follows.

10.

In Equation 10, RHn and RHp respectively represent the number of relay hops of neighboring cells and SpCells, and can be specified in the RMSI or informed for each cell through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. In Equation 10, deltan and deltap values are weighted values based on the number of relay hops of neighboring cells and SpCell, respectively, and may be specified in the RMSI, or may be informed cell-by-cell (or measurement specific) through RRC signaling information measObjectNR. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the weight value without SS block decoding. In Equation 10, the values of deltan and deltap are assumed to be the same as weight values for the number of relay hops and can be operated to signal only one value. Equation 10 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that cells with a larger number of relay hops are intentionally unsuitable for connection / attachment of the terminal, so that the number of relay hops is small The intention is to have the terminal attached to.

Above events A5-3 and A5-4 remove Hys in the A5-3 and A5-4 formulas as a condition of removing neighboring cells from the list of cells to report the measurement result, and SpCell's measurement result is Threshold 1 (Thresh If greater than 1) and the measurement result of the neighboring cell is smaller than the threshold 2 (Thresh 2), it is meant to remove the neighboring cell from the cell list. In the formula, Ocn is a cell specific offset value for a neighboring cell, and Ofn is a measurement target specific offset value for a neighboring cell (a frequency specific value having the same value for the same frequency). If this condition is reflected as a formula without relay hop count, it is as follows.

11.

In Equation 11, RHn and RHp denote relay hop numbers of neighboring cells and SpCell, respectively, and can be indicated in each cell through measObjectNR, which is specified in RMSI or RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. In Equation 11, deltan and deltap values are weighted values based on the number of relay hops of neighboring cells and SpCell, respectively. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the weight value without SS block decoding. In Equation 11, the values of deltan and deltap are assumed to be the same as weight values for the number of relay hops and can be operated so that only one value is signaled. Equation 11 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that cells with a large number of relay hops are intentionally unsuitable for connection / attachment of the terminal, so that the number of relay hops is small. The intention is to make the terminal stick.

In the event A6-1 above, the margin of Hys is added as a condition of adding a neighboring cell to the cell list to report the measurement result, and the neighboring cell is added to the cell list when the measurement result of the neighboring cell is higher than the measurement result of the SCell. Becomes Here, the SCell may be regarded as a serving cell. That is, in event A6, a (secondary) secondary cell corresponding to measObjectNR associated with the event may be regarded as the serving cell. In the formula, Ocn and Ocs are cell specific offset values for neighbor cells and SCell, respectively, and Off can be regarded as event specific offset values. If this condition is reflected as a formula without relay hop count, it is as follows.

12.

In Equation 12, RHn and RHs denote relay hop numbers of neighboring cells and SCells, respectively, and can be specified in the RMSI or informed for each cell through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. In Equation 12, deltan and deltas are weighted values according to the number of relay hops of neighboring cells and SCells, respectively, and may be specified in the RMSI or may be informed for each cell (or measurement specific) in measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the weight value without SS block decoding. In Equation 12, the values of deltan and deltas are assumed to be the same as weight values for the number of relay hops and can be operated to signal only one value. Equation 12 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that a cell with a large number of relay hops is intentionally unsuitable for connection / attachment of the terminal, so that a cell with a small number of relay hops The intention is to make the terminal stick.

In the event A6-2 above, the margin of Hys is set as a condition of removing the neighbor cell from the cell list to report the measurement result, and the neighbor cell is removed from the cell list when the measurement result of the neighbor cell is lower than the measurement result of the SCell. Becomes In the formula, Ocn and Ocs are cell specific offset values for neighbor cells and SCell, respectively, and Off can be regarded as event specific offset values. If this condition is reflected as a formula without relay hop count, it is as follows.

13.

In Equation 13, RHn and RHs represent the number of relay hops of neighbor cells and SCells, respectively, and can be specified in the RMSI or informed for each cell through measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the number of relay hops without SS block decoding. In equation 13, deltan and deltas are weight values according to the number of relay hops of neighboring cells and SCells, respectively, and may be specified in the RMSI, or may be informed for each cell (or measurement specific) in measObjectNR, which is RRC signaling information. When informed by the RMSI, the UE must decode the SS block, but when informed by measObjectNR, the UE can know the weight value without SS block decoding. In equation 13, the values of deltan and deltas are assumed to be the same value as the weight value for the number of relay hops and can be operated to signal only one value. Equation 13 has the effect of arbitrarily lowering the value of the RRM measurement result according to the number of relay hops, so that cells with a large number of relay hops are intentionally unsuitable for connection / attachment of the terminal, so that the number of relay hops is small. The intention is to make the terminal stick.

In the above inventions 1 to 13, whether an event for which the relay hop number is added or an existing event condition is used in an event for an existing RRM may be informed in RRC signaling (eg, measObjectNR).

In the inventions 1 to 13, Ms, Mn, Mp, and Ms, which are RRM measurement results of serving cells, neighboring cells, SpCells, and SCells, which are not considered offset, may be inaccurate in terms of measurement quality when a relay node is considered. . For example, when the result of RRM measurement of one relay node is R1, when the relay node is a single hop, it may be regarded that R1 does not reflect RRM from the donor node to the relay node. If the R1 value is high, but the RRM quality from the donor node to the relay node is not good, the actual data transmission will not have good quality. Accordingly, the relay node needs to inform the RMSI or RRC signaling (eg, measObjectNR) of the worst value of the RRM from itself to the donor node. At this time, if the relay node has multiple paths to the donor node, it may inform all of the worst RRMs for the multiple paths. Through this, the UE or the IAB node may use a smaller value in Ms, Mn, Mp, and Ms of the inventions 1 to 13 in comparison with the worst RRM during its RRM. RRC signaling (eg measObjectNR) can tell whether this worst-case RRM is used in event-triggered RRM or not.

In addition, new events can be added to report new RRM measurement results. An event is one that creates an entry condition and a removal condition when the hop count is more than a certain number regardless of the actual RSRP value.

As a concept corresponding to the event A3 of [Reference 3], the following conditions can be considered.

14. When the number of hops of the neighbor cell is more than a certain number or more than the number of hops of the PSCell, the entry condition and the removal condition of the list to report the RRM measurement result can be applied.

A. Entry conditions: RHn-N1 <RHp

B. Removal conditions: RHn + N2> RHp

In the above, the values of RHn, RHp, N1, and N2 can be informed by RMSI or RRC signaling (e.g. measObjectNR), each of the number of relay hops of neighboring cells, the number of relay hops of PSCell, the entry condition hop count margin for events, The elimination condition hop count for the event is margin. The entry condition is the concept of adding the RRM measurement result to the list to report when the number of hops of the neighboring cell is less than the number of hops of the PSCell by using the neighboring cell with the fewest hops as the cell configuration for the actual UE. For sake. When the number of hops of the neighboring cell is more than a certain number of hops than the number of hops of the PSCell, the removal condition is a concept of subtracting from the list to report the RRM measurement result. Through this, the neighboring cell having the high number of hops is not used in advance in configuring the cell for the actual UE. In order not to. In addition, preferably, the removal condition may include a case where the number of hops of the neighbor cell is the same as the number of hops of the PSCell. N1 and N2 may be informed by measObjectNR, which is RRC signaling information, or other RRC signaling information, and N1 and N2 may be applied with the same value.

Invention 14 can be used as an additional condition in the current event. For example, in addition to the condition of event A3, it may be defined that the neighboring cell may be added to the reporting list only when the number of hops of the neighboring cell is more than a certain number of hops of the PSCell or subtracted from the reporting list only when the number of hops of the neighboring cell is more than the predetermined number. Whether to consider invention No. 14 as an additional condition can be indicated by RRC signaling (eg measObjectNR).

As a concept corresponding to the event A4 of [Reference 4], the following conditions may be considered.

15. When the number of hops of neighboring cells is more than a certain number or more than the threshold value, the entry condition and the removal condition may be applied to the list to report the RRM measurement result.

A. Entry conditions: RHn <threshold1

B. Removal conditions: RHn> threshold2

In the above, the values of RHn, RHp, threshold1, and threshold2 can be informed by RMSI or RRC signaling (e.g. measObjectNR), each of the number of relay hops of neighboring cells, the number of relay hops of PSCell, the entry condition threshold for the event, and the elimination. Condition threshold. The entry condition is a concept of adding a RRM measurement result to a list to report when the neighboring cell has a smaller number of hops than a predetermined number, so that the neighboring cell having a small hop count can be used for cell configuration for the actual UE. The removal condition is a concept of subtracting from the list to report the RRM measurement result when the neighboring cell has more than a certain number of hops, so that the neighboring cell having a large number of hops is not used in advance in the cell configuration for the actual UE. threshold1 and threshold2 may be informed by measObjectNR, which is RRC signaling information, or other RRC signaling information, and threshold1 and threshold2 may be applied to the same value.

The 15th invention can be considered to be used as an additional condition in the current event. For example, in addition to the condition of the event A4, it may be defined that the neighboring cell may be added to the reporting list only when the number of hops of the neighboring cell is less than a certain amount (RHn <threshold1) or subtracted from the reporting list only when the number of hops is more than the certain number (RHn> threshold2). Whether or not the 15th invention is considered as an additional condition can be indicated by RRC signaling (eg, measObjectNR).

As a concept corresponding to the event A6 of [Reference 6], the following conditions may be considered.

16. When the number of hops of the neighboring cell is more than a certain number or more than the number of hops of the SCell, the entry condition and the removal condition of the list to report the RRM measurement result can be applied.

A. Entering condition: RHn-N1 <RHs

B. Leaving condition: RHn + N2> RHs

In the above, the values of RHn, RHs, N1, and N2 may be informed by RMSI or RRC signaling (for example, measObjectNR), each of the number of relay hops of neighboring cells, number of relay hops of SCell, entry condition hop number of events, margin of event, The elimination condition hop count for the event is margin. The entry condition is a concept of adding a RRM measurement result to a list to report when the neighbor cell has a predetermined number of hops smaller than the SCell. This is to use a neighbor cell having a small hop count in a cell configuration for an actual UE. The removal condition is a concept of subtracting from the list to report the RRM measurement result when the neighbor cell has more than a certain number of hops than the SCell, so that the neighbor cell having a large number of hops is not used in advance in configuring the cell for the actual UE. N1 and N2 may be informed by measObjectNR, which is RRC signaling information, or other RRC signaling information, and N1 and N2 may be applied with the same value.

Invention 16 can be used as an additional condition in the current event. For example, in addition to the condition of event A6, it may be defined that the neighboring cell may be added to the reporting list only when the number of hops of the neighboring cell is less than or equal to the number of hops of the SCell or to be removed from the reporting list only when the number of hops of the neighboring cell is more than the predetermined number. Whether or not the 16th invention is considered as an additional condition may be indicated by RRC signaling (for example, measObjectNR).

The base station may use the entry conditions and removal conditions of the 1 to 16 invention for reselection of the IAB node.

The said invention of 1-16 can use only a part or its combination.

10 to 11 is a view to which an embodiment of the present invention is applied.

Referring to FIG. 10, the terminal may receive hop number information from the donor base station (S1010). Here, the terminal is located in the first cell, and the information about the first cell where the terminal is located to distinguish it from the information about the second cell which is the neighboring cell is referred to as first hop number information. The terminal may determine whether to report a quality measurement result (eg, RRM measurement) for the first cell to the base station based on the first hop number information (S1020). S1020 may be a step of determining whether an entry condition and / or a removal condition are satisfied whether to include the first cell in the RRM result report cell list in the above-described embodiments of the present invention. The first hop number information may be the hop number (first hop number) based on the number of relay nodes in the first cell located on the path from the donor base station to the terminal of the first cell. In addition, the first hop number information may further include an offset value assigned to the first hop number.

The terminal may report the measurement result (for example, communication quality of RSRP, RSRQ, etc.) of the first cell to the base station according to the determination result of S1020 (S1030). For example, the UE will feed back the measurement result only to the base station when the first hop number information of the first cell satisfies a predetermined condition (eg, entry condition), and satisfies another condition (eg, removal condition). The measurement result may not be fed back to the base station.

The UE may determine whether to include the neighboring second cell in the RRM result report cell list in consideration of the number of relay hops for the neighboring second cell as well as the first cell in which the terminal is located.

Referring to the example of FIG. 11, in the terminal located in the first cell, the number of hops from the donor base station to the terminal is 4 (first hop number) for the first cell, and for the second cell. The hop count (second hop count) is three. Comparing the first result value and the second result value with the first offset and the second offset applied to the first hop number and the second hop number, respectively, and when the second result value is smaller, the second cell is added to the RRM result reporting cell list. It may include and report the RRM result for the second cell to the base station. Here, assuming that the first offset value and the second offset value are the same, since the second result value is smaller than the first result value, the terminal may include the second cell in the RRM result report cell list.

Although not limited thereto, the various descriptions, functions, procedures, suggestions, methods and / or operational flowcharts of the present invention disclosed herein may be applied to various fields requiring wireless communication / connection (eg, 5G) between devices. have.

Hereinafter, with reference to the drawings to illustrate in more detail. The same reference numerals in the following drawings / descriptions may illustrate the same or corresponding hardware blocks, software blocks, or functional blocks unless otherwise indicated.

12 illustrates a communication system 1 applied to the present invention.

12, a communication system 1 applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a radio access technology (eg, 5G New RAT (Long Term), Long Term Evolution (LTE)), and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may be a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, a home appliance 100e. ), IoT (Internet of Thing) device (100f), AI device / server 400 may be included. For example, the vehicle may include a vehicle having a wireless communication function, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, and the like. Here, the vehicle may include an unmanned aerial vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, Head-Mounted Device (HMD), Head-Up Display (HUD), television, smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. The portable device may include a smartphone, a smart pad, a wearable device (eg, smart watch, smart glasses), a computer (eg, a notebook, etc.). The home appliance may include a TV, a refrigerator, a washing machine, and the like. IoT devices may include sensors, smart meters, and the like. For example, the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station / network node to other wireless devices.

The wireless devices 100a to 100f may be connected to the network 300 through the base station 200. AI (Artificial Intelligence) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300. The network 300 may be configured using a 3G network, a 4G (eg LTE) network or a 5G (eg NR) network. The wireless devices 100a-100f may communicate with each other via the base station 200 / network 300, but may also communicate directly (e.g. sidelink communication) without going through the base station / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. vehicle to vehicle (V2V) / vehicle to everything (V2X) communication). In addition, the IoT device (eg, sensor) may directly communicate with another IoT device (eg, sensor) or another wireless device 100a to 100f.

Wireless communication /

connection

150a, 150b, 150c may be performed between the wireless devices 100a-100f / base station 200 and base station 200 / base station 200. Here, the wireless communication / connection is various wireless connections such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), inter-base station communication 150c (eg relay, integrated access backhaul), and the like. Technology (eg, 5G NR) via wireless communication /

connections

150a, 150b, 150c, the wireless device and the base station / wireless device, the base station and the base station may transmit / receive radio signals to each other. For example, the wireless communication /

connection

150a, 150b, 150c may transmit / receive signals over various physical channels.To this end, based on various proposals of the present invention, a wireless signal for transmission / reception At least some of various configuration information setting processes, various signal processing processes (eg, channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.) and resource allocation processes may be performed.

13 illustrates a wireless device that can be applied to the present invention.

Referring to FIG. 13, the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals through various wireless access technologies (eg, LTE and NR). Here, the {first wireless device 100 and the second wireless device 200} may refer to the {wireless device 100x, the base station 200} and / or the {wireless device 100x, the wireless device 100x of FIG. 12. }.

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 controls the memory 104 and / or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 102 may process the information in the memory 104 to generate the first information / signal, and then transmit the wireless signal including the first information / signal through the transceiver 106. In addition, the processor 102 may receive the radio signal including the second information / signal through the transceiver 106 and store the information obtained from the signal processing of the second information / signal in the memory 104. The memory 104 may be coupled to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may perform instructions to perform some or all of the processes controlled by the processor 102 or to perform descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Can store software code that includes them. Here, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 106 may be coupled to the processor 102 and may transmit and / or receive wireless signals via one or more antennas 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be mixed with a radio frequency (RF) unit. In the present invention, a wireless device may mean a communication modem / circuit / chip.

The second wireless device 200 may include one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 controls the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 202 may process the information in the memory 204 to generate third information / signal, and then transmit the wireless signal including the third information / signal through the transceiver 206. In addition, the processor 202 may receive the radio signal including the fourth information / signal through the transceiver 206 and then store information obtained from the signal processing of the fourth information / signal in the memory 204. The memory 204 may be connected to the processor 202 and store various information related to the operation of the processor 202. For example, the memory 204 may perform instructions to perform some or all of the processes controlled by the processor 202 or to perform descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Can store software code that includes them. Here, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 206 may be coupled with the processor 202 and may transmit and / or receive wireless signals via one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be mixed with an RF unit. In the present invention, a wireless device may mean a communication modem / circuit / chip.

Hereinafter, hardware elements of the

wireless devices

100 and 200 will be described in more detail. One or more protocol layers may be implemented by one or

more processors

102, 202, although not limited thereto. For example, one or

more processors

102 and 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or

more processors

102, 202 may employ one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. Can be generated. One or

more processors

102, 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. One or

more processors

102, 202 may generate signals (eg, baseband signals) including PDUs, SDUs, messages, control information, data or information in accordance with the functions, procedures, suggestions and / or methods disclosed herein. And one or

more transceivers

106 and 206. One or

more processors

102, 202 may receive signals (eg, baseband signals) from one or

more transceivers

106, 206, and include descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. In accordance with the above, a PDU, an SDU, a message, control information, data, or information can be obtained.

One or

more processors

102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or

more processors

102, 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) May be included in one or

more processors

102, 202. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) of It may be driven by the above-described processor (102, 202). The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions, and / or a set of instructions.

One or

more memories

104, 204 may be coupled to one or

more processors

102, 202 and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or instructions. One or

more memories

104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer readable storage medium, and / or combinations thereof. One or

more memories

104, 204 may be located inside and / or outside one or

more processors

102, 202. In addition, one or

more memories

104, 204 may be coupled with one or

more processors

102, 202 through various techniques, such as a wired or wireless connection.

One or

more transceivers

106 and 206 may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operational flowcharts of this document, to one or more other devices. One or

more transceivers

106 and 206 may receive, from one or more other devices, user data, control information, wireless signals / channels, etc., as mentioned in the description, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. have. For example, one or

more transceivers

106 and 206 may be coupled with one or

more processors

102 and 202 and may transmit and receive wireless signals. For example, one or

more processors

102 and 202 may control one or

more transceivers

106 and 206 to transmit user data, control information or wireless signals to one or more other devices. In addition, one or

more processors

102 and 202 may control one or

more transceivers

106 and 206 to receive user data, control information or wireless signals from one or more other devices. In addition, one or

more transceivers

106, 206 may be coupled with one or

more antennas

108, 208, and one or

more transceivers

106, 206 may be connected to one or

more antennas

108, 208 through the description, functions, and features disclosed herein. Can be set to transmit and receive user data, control information, wireless signals / channels, etc., which are mentioned in the procedures, procedures, suggestions, methods and / or operational flowcharts, and the like. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). One or

more transceivers

106, 206 may process the received wireless signal / channel or the like in an RF band signal to process received user data, control information, wireless signals / channels, etc. using one or more processors 102,202. The baseband signal can be converted. One or

more transceivers

106 and 206 may use the one or

more processors

102 and 202 to convert processed user data, control information, wireless signals / channels, etc. from baseband signals to RF band signals. To this end, one or

more transceivers

106 and 206 may include (analog) oscillators and / or filters.

14 shows another example of a wireless device to which the present invention is applied. The wireless device may be implemented in various forms depending on the use-example / service (see FIG. 12).

Referring to FIG. 14, the

wireless devices

100 and 200 correspond to the

wireless devices

100 and 200 of FIG. 13, and various elements, components, units / units, and / or modules are described. It can be configured as a module. For example, the

wireless device

100, 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit may include communication circuitry 112 and transceiver (s) 114. For example, communication circuitry 112 may include one or

more processors

102, 202 and / or one or

more memories

104, 204 of FIG. 13. For example, the transceiver (s) 114 may include one or

more transceivers

106, 206 and / or one or

more antennas

108, 208 of FIG. 13. The controller 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140, and controls various operations of the wireless device. For example, the controller 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to the outside (eg, other communication devices) through the communication unit 110 through a wireless / wired interface, or externally (eg, through the communication unit 110). Information received through a wireless / wired interface from another communication device) may be stored in the memory unit 130.

The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include at least one of a power unit / battery, an I / O unit, a driver, and a computing unit. Although not limited thereto, the wireless device may be a robot (FIGS. 12, 100 a), a vehicle (FIGS. 12, 100 b-1, 100 b-2), an XR device (FIGS. 12, 100 c), a portable device (FIGS. 12, 100 d), a home appliance. (Fig. 12, 100e), IoT devices (Fig. 12, 100f), terminals for digital broadcasting, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, It may be implemented in the form of an AI server / device (FIGS. 12 and 400), a base station (FIGS. 12 and 200), a network node, and the like. The wireless device may be used in a mobile or fixed location depending on the usage-example / service.

In FIG. 14, various elements, components, units / units, and / or modules in the

wireless devices

100 and 200 may be entirely interconnected through a wired interface, or at least a part of them may be wirelessly connected through the communication unit 110. For example, the control unit 120 and the communication unit 110 are connected by wire in the

wireless device

100 or 200, and the control unit 120 and the first unit (eg, 130 and 140) are connected through the communication unit 110. It can be connected wirelessly. In addition, each element, component, unit / unit, and / or module in

wireless device

100, 200 may further include one or more elements. For example, the controller 120 may be composed of one or more processor sets. For example, the controller 120 may be configured as a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, and the like. As another example, the memory unit 130 may include random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and / or combinations thereof.

15 illustrates a vehicle or an autonomous vehicle applied to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, or the like.

Referring to FIG. 15, the vehicle or the autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and autonomous driving. It may include a portion 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110/130 / 140a through 140d respectively correspond to blocks 110/130/140 in FIG.

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other vehicles, a base station (e.g. base station, road side unit, etc.), a server, and other external devices. The controller 120 may control various elements of the vehicle or the autonomous vehicle 100 to perform various operations. The control unit 120 may include an electronic control unit (ECU). The driving unit 140a may cause the vehicle or the autonomous vehicle 100 to travel on the ground. The driver 140a may include an engine, a motor, a power train, wheels, a brake, a steering device, and the like. The power supply unit 140b supplies power to the vehicle or the autonomous vehicle 100, and may include a wired / wireless charging circuit, a battery, and the like. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like. The sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / Reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, illuminance sensors, pedal position sensors, and the like. The autonomous driving unit 140d is a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and automatically setting a route when a destination is set. Technology and the like.

For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the obtained data. The controller 120 may control the driving unit 140a to move the vehicle or the autonomous vehicle 100 along the autonomous driving path according to the driving plan (eg, speed / direction adjustment). During autonomous driving, the communication unit 110 may acquire the latest traffic information data aperiodically from an external server and may obtain the surrounding traffic information data from the surrounding vehicles. In addition, during autonomous driving, the sensor unit 140c may acquire vehicle state and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly obtained data / information. The communication unit 110 may transmit information regarding a vehicle location, an autonomous driving route, a driving plan, and the like to an external server. The external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomous vehicles, and provide the predicted traffic information data to the vehicle or autonomous vehicles.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to constitute an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form embodiments by combining claims that do not have an explicit citation in the claims or as new claims by post-application correction.

In this document, embodiments of the present invention have been mainly described based on a signal transmission / reception relationship between a terminal and a base station. This transmission / reception relationship is extended to the same / similarly for signal transmission / reception between the terminal and the relay or the base station and the relay. Certain operations described in this document as being performed by a base station may be performed by an upper node in some cases. That is, it is apparent that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station. A base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like. In addition, the terminal may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit of the invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

The present invention can be used in a terminal, base station, relay or other equipment of a wireless mobile communication system.

Claims

A communication method by a terminal located in a first cell in a wireless communication system,

Receiving first hop number information for the first cell from the donor base station; And

Determining whether to report a quality measurement result for the first cell to a base station based on the first hop number information;

The first hop number information is,

And a first offset value assigned to the first hop number and the first hop number according to the number of relay nodes of the first cell, located on a path from the donor base station to the terminal.

Communication method.
The method of claim 1,

Receiving second hop number information for a second cell from the donor base station;

The second hop number information is,

It includes a second hop number according to the number of relay nodes of the second cell located on the path from the donor base station to the terminal and the second offset value given to the second hop number,

Communication method.
The method of claim 2,

Comparing a first result value to which the first offset value is applied to the first hop number and a second result value to which a second offset value is applied to the second hop number,

Report the quality measurement result for the second cell to the base station when the first result value is greater than the second result value;

And if the first result value is smaller than the second result value, reporting the quality measurement result for the second cell to the base station.
The method of claim 2,

The first hop number information and the second hop number information are received through a system information block (SIB) or a higher layer signal.
The method of claim 2,

And the second cell is a cell neighboring the first cell in which the terminal is located.
The method of claim 1,

And the relay node is an integrated access and backhaul (IAB) node.
A terminal located in a first cell, used in a wireless communication system,

Memory; And

A processor, wherein the processor,

Receive first hop number information for a first cell from a donor base station,

Determine whether to report a quality measurement result for the first cell to a base station based on the first hop number information,

The first hop number information is,

And a first offset value assigned to the first hop number and a first hop number according to the number of relay nodes of the first cell, located on a path from the donor base station to the terminal.
The method of claim 7, wherein the processor,

Receive second hop number information for a second cell from the donor base station,

The second hop number information,

And a second offset value according to the number of relay nodes of the second cell located on a path from the donor base station to the terminal and a second offset value assigned to the second hop number.
The method of claim 8, wherein the processor,

Comparing a first result value to which the first offset value is applied to the first hop number and a second result value to which a second offset value is applied to the second hop number,

Report the quality measurement result for the second cell to the base station when the first result value is greater than the second result value;

If the first result value is smaller than the second result value, the terminal does not report the quality measurement result for the second cell to the base station.
The method of claim 8,

The first hop number information and the second hop number information are received through a system information block (SIB) or a higher layer signal.
The method of claim 8,

The second cell is a cell neighboring the first cell where the terminal is located.
The method of claim 7, wherein

The relay node is an IAB (Integrated Access and Backhaul) node.
The terminal of claim 7, wherein the terminal comprises an autonomous vehicle capable of communicating with at least one of the relay node, the donor base station, and another autonomous vehicle other than the terminal.