Method executed by terminal, method executed by base station, terminal and base station

Abstract

A method performed by a terminal in a wireless communication system is provided, comprising: receiving a configuration message including configuration information of at least one reference signal related to radio resource management (RRM) from a base station; receiving the at least one reference signal from the base station based on the configuration message; performing measurement on the at least one reference signal based on the configuration message; and reporting the measurement result to the base station, wherein the configuration message includes first information about a cell on which the at least one reference signal is sent and second information about a resource on which the at least one reference signal is sent on the cell, wherein the first information includes information about an identification ID of the cell and frequency information associated with the measurement of the at least one reference signal sent on the cell, and wherein, in a case where the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

Description

[0001] This application is a divisional application of an invention patent application with an application date of March 23, 2018, application number: 201880019691.6, and invention name: "Method, device and system for measurement configuration of different reference signals and cell measurement reporting mechanism for terminal". Technical Field

[0002] The present disclosure relates to a next generation wireless communication system. More specifically, the present disclosure relates to a method for allocating and transmitting different reference signals to a terminal, and a system, method and apparatus for performing cell measurement and mobility management using the transmitted different reference signals in a beamforming-based system including one or more base stations and one or more terminals. Background Art

[0003] In order to meet the growing demand for wireless data services after the commercialization of the fourth generation (4G) communication system, efforts have been made to develop an improved fifth generation (5G) or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 4G network communication system beyond or a post-LTE system.

[0004] In order to achieve the high data rates considered in the present disclosure, it has been considered to implement 5G communication systems in ultra-high frequency (millimeter wave) bands (e.g., such as 60 GHZ bands). In order to reduce the path loss of radio waves and increase the transmission distance of radio waves in ultra-high frequency bands, beamforming, large-scale multiple-input and multiple-output (MIMO), full-dimension MIMO (FD-MIMO), array antennas, analog beamforming and large-scale antenna technologies for 5G communication systems have been discussed. In addition, for system network improvements in 5G communication systems, technical development has been carried out for evolved small cells, advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device to device communication (D2D), wireless backhaul, mobile networks, collaborative communications, coordinated multi-points (CoMP) and reception interference elimination. In addition, in the 5G system, hybrid frequency-shift keying (FSK) and quadrature amplitude modulation (QAM) modulation (FQAM) and sliding window superposition coding (SWSC) corresponding to the advanced coding modulation (ACM) system, as well as filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) corresponding to advanced connection technologies have been developed.

[0005] On the other hand, the Internet, which is a human-centered connected network in which humans generate and consume information, is now evolving into the Internet of Things (IoT), in which distributed entities such as things exchange and process information. The Internet of Everything (IoE) has emerged, which is a combination of IoT technology and big data processing technology through connection with cloud servers. With the demand for technical elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology and security technology for IoT implementation, sensor networks for machine-to-machine connection, machine-to-machine (M2M) communication, machine type communication (MTC), etc. have been studied recently. This IoT environment can provide intelligent Internet technology (IT) services that create new value for human life by collecting and analyzing data generated between connected things. IoT can be applied to various fields, including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart appliances, and advanced medical services, through the integration and combination of existing information technology (IT) with various industries.

[0006] Therefore, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies for sensor networks, M2M communications, and MTC are implemented through beamforming, MIMO, and array antenna technologies corresponding to 5G communication technologies. As a big data processing technology as described above, the application of cloud RAN will be an example of the fusion of 5G technology and IoT technology.

[0007] In a communication system, a terminal needs to perform initial cell selection and cell reselection in idle mode in order to select the best base station for access. In addition, in order for the terminal to switch to a better cell in connected mode, radio resource management (RRM) measurements need to be performed. In order to determine the cell and compare the performance between cells as described above, each terminal can observe and calculate the measured value representing each cell or the value derived by the measurement.

[0008] To this end, in the shared frequency band using omni-directional beams in the existing LTE, different base stations reserve orthogonal resources and use these resources to send cell-specific reference signals, and the terminal measures the reference signals to know the received signal strength (RSRP) of each cell.

[0009] In addition, in the next-generation communication system considering beamforming, various methods have been studied in the related art, in which different base stations use different beams to alternately send cell- and beam-specific reference signals on different resources, and the terminal uses measurement values ​​for multiple beams sent from one cell to derive a representative value corresponding to the corresponding cell.

[0010] The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Summary of the invention

[0011] Technical issues

[0012] Although reference signal transmission using one beam or reference signal transmission using multiple beams has been studied in the related art, the situation in which each base station uses two or more beams with different beam areas, coverage ranges, and transmission periods to send two or more reference signals generated by different signal generation rules has not been studied in the related art.

[0013] Therefore, there is a need for a method for allocating and sending different reference signals to a terminal, and a method for performing cell measurement and mobility management using different reference signals sent to a terminal in a beamforming-based system including one or more base stations and one or more terminals.

[0014] Problem Solution

[0015] An aspect of the present disclosure is to solve at least the above-mentioned problems and / or disadvantages and to provide at least the advantages described below. Therefore, one aspect of the present disclosure provides a method for allocating and transmitting different reference signals to a terminal, and a method for performing cell measurement and mobility management using different reference signals transmitted to a terminal in a beamforming-based system including one or more base stations and one or more terminals.

[0016] According to one aspect of the present disclosure, a method performed by a base station is provided. The method includes: determining configuration information about at least one reference signal related to measurement of a serving cell and a neighboring cell for handover, and sending the determined configuration information to a terminal, wherein the determined configuration information includes first information about a cell to which the at least one reference signal is sent and second information about a corresponding resource to which the at least one reference signal is sent in the cell.

[0017] According to another aspect of the present disclosure, a method performed by a terminal is provided. The method includes: receiving configuration information of at least one reference signal related to a serving cell and a neighboring cell, performing measurement for handover based on the configuration information, and reporting the measurement result to a base station, wherein the configuration information includes first information about a cell to which the at least one reference signal is sent and second information about a corresponding resource to which the at least one reference signal is sent in the cell.

[0018] According to another aspect of the present disclosure, a base station is provided. The base station includes a transceiver and a controller, the controller being configured to determine configuration information about at least one reference signal related to measurement of a serving cell and a neighboring cell for handover, and control the transceiver to send the determined configuration information to a terminal, wherein the determined configuration information includes first information about a cell to which the at least one reference signal is sent and second information about a corresponding resource to which the at least one reference signal is sent in the cell.

[0019] According to another aspect of the present disclosure, a terminal is provided. The terminal includes: a transceiver configured to receive configuration information of at least one reference signal related to a serving cell and a neighboring cell; and a controller configured to perform measurement for handover based on the configuration information and control the transceiver to report the measurement result to a base station, wherein the configuration information includes first information about a cell to which the at least one reference signal is transmitted and second information about a corresponding resource to which the at least one reference signal is transmitted in the cell.

[0020] According to one aspect of the present disclosure, a method performed by a terminal in a wireless communication system is provided. The method includes: receiving a configuration message including configuration information of at least one reference signal related to radio resource management RRM from a base station; receiving the at least one reference signal from the base station based on the configuration message; performing measurement on the at least one reference signal based on the configuration message; and reporting the result of the measurement to the base station, wherein the configuration message includes first information about the cell on which the at least one reference signal is transmitted and second information about the resource to which the at least one reference signal is transmitted on the cell, wherein the first information includes information about an identification ID of the cell and frequency information associated with the measurement of the at least one reference signal transmitted on the cell, and wherein, in the case where the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

[0021] According to one aspect of the present disclosure, a method performed by a base station in a wireless communication system is provided. The method includes: determining configuration information about at least one reference signal related to radio resource management RRM; sending a configuration message including the determined configuration information to a terminal; and sending the at least one reference signal to the terminal according to the configuration information, wherein the configuration message includes first information about the cell on which the at least one reference signal is sent and second information about the resource to which the at least one reference signal is sent on the cell, wherein the first information includes information about an identification ID of the cell and frequency information associated with the measurement of the at least one reference signal sent on the cell, and wherein, in the case where the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

[0022] According to one aspect of the present disclosure, a terminal in a wireless communication system is provided. The terminal includes: a transceiver; and a controller configured to: receive a configuration message including configuration information of at least one reference signal related to radio resource management RRM from a base station via the transceiver; receive the at least one reference signal from the base station via the transceiver based on the configuration message; perform measurement on the at least one reference signal based on the configuration message; and report the measurement result to the base station, wherein the configuration message includes first information about the cell on which the at least one reference signal is sent and second information about the resource to which the at least one reference signal is sent on the cell, wherein the first information includes information about an identification ID of the cell and frequency information associated with the measurement of the at least one reference signal sent on the cell, and wherein, in the case where the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

[0023] According to one aspect of the present disclosure, a base station in a wireless communication system is provided. The base station includes: a transceiver; and a controller configured to: determine configuration information about at least one reference signal related to radio resource management RRM; send a configuration message including the determined configuration information to a terminal via the transceiver; and send the at least one reference signal to the terminal via the transceiver according to the configuration information, wherein the configuration message includes first information about the cell on which the at least one reference signal is sent and second information about the resource to which the at least one reference signal is sent on the cell, wherein the first information includes information about an identification ID of the cell and frequency information associated with the measurement of the at least one reference signal sent on the cell, and wherein, in the case where the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

[0024] Advantageous Effects of the Invention

[0025] According to one aspect of the present disclosure, in a beamforming-based system including one or more base stations and one or more terminals, the base station may allocate different reference signals to the terminal, and the terminal may perform cell measurement and mobility management using the allocated different reference signals.

[0026] In addition, the terminal recognizes common information such as time, frequency, and direction between different reference signals, and thus can minimize unnecessary operations when selecting a transmission beam and a reception beam between a base station and a terminal, such as repeated alternating transmission / reception of a beam and selecting a beam by receiving signal measurement. Therefore, power consumption and time delay of the terminal can be reduced.

[0027] Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses various embodiments of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0029] Figure 1 shows a reference signal transmitted according to an embodiment of the present disclosure;

[0030] Figure 2 Different kinds of reference signals with different numbers of blocks in the same time resource according to an embodiment of the present disclosure are shown;

[0031] Figure 3Different types of reference signals sent with the same period using the same frequency band in different time resources according to an embodiment of the present disclosure are shown;

[0032] Figure 4 It shows reference signals sent with different periods using the same frequency band in different time resources according to an embodiment of the present disclosure;

[0033] Figure 5A , Figure 5B and Figure 5C A resource allocation method when a channel state information reference signal (CSI-RS) to be configured is associated with a pre-existing synchronization signal (SS) according to various embodiments of the present disclosure is shown;

[0034] Figure 6 A resource allocation method when a CSI-RS to be configured is associated with a pre-existing SS according to an embodiment of the present disclosure is shown;

[0035] Figure 7 A resource allocation method when a CSI-RS to be configured is associated with a pre-existing SS according to an embodiment of the present disclosure is shown;

[0036] Figure 8 It is shown that a physical broadcast channel (PBCH) block uses an offset to configure a CSI-RS burst set, burst, and block according to an embodiment of the present disclosure;

[0037] Fig. 9 It is shown that PBCH bursts according to an embodiment of the present disclosure use offsets to configure CSI-RS burst sets, bursts, and blocks;

[0038] Fig.10 It is shown that the PBCH burst set according to an embodiment of the present disclosure uses an offset to configure the CSI-RS burst set, burst and block;

[0039] Fig.11A and Fig. 11B It is shown that a base station according to various embodiments of the present disclosure occupies downlink resources to send configuration information for CSI-RS measurement using a broadcast channel and sends the configuration information for CSI-RS measurement to a terminal through corresponding downlink resources;

[0040] Fig.12 is a flowchart showing a method for reporting a measurement result according to RS configuration of a serving base station for a terminal, RS measurement of the configured terminal, and a condition of the terminal according to an embodiment of the present disclosure;

[0041] Fig.13 is a flowchart showing an embodiment related to a case where a serving base station configures information about different RSs to a terminal according to an embodiment of the present disclosure;

[0042] Fig.14 is a flowchart showing an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure;

[0043] Fig.15 is a flowchart showing an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure;

[0044] Fig.16 is a flowchart showing an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure;

[0045] Fig.17 is a flowchart showing an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure;

[0046] Fig.18A , Fig.18B and Fig.18C is a block diagram showing a structure of a terminal according to various embodiments of the present disclosure; and

[0047] Fig.19 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure.

[0048] Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. DETAILED DESCRIPTION

[0049] The following description is provided with reference to the accompanying drawings to assist in a comprehensive understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details that are helpful for understanding, but these are merely exemplary. Therefore, it will be appreciated by those of ordinary skill in the art that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and conciseness, descriptions of known functions and structures may be omitted.

[0050] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Therefore, it is apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustrative purposes only and not for limiting the present disclosure as defined by the appended claims and their equivalents.

[0051] It should be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0052] The term "substantially" means that the features, parameters or values ​​described need not be achieved precisely, but deviations or changes (including, for example, tolerances, measurement errors, measurement precision limitations and other factors known to those skilled in the art) may occur in amounts that do not eliminate the effect that the feature is intended to provide.

[0053] By referring to the embodiments that will be described with reference to the accompanying drawings, aspects and features of the present disclosure and methods for realizing these aspects and features will become apparent. However, the present disclosure is not limited to the embodiments disclosed below, but can be implemented in various forms. Matters defined in the specification, such as detailed structures and elements, are merely provided to help those of ordinary skill in the art to fully understand the specific details of the present disclosure, and the present disclosure is only defined within the scope of the appended claims. Throughout the description of the present disclosure, the same reference numerals in different drawings are used for the same elements.

[0054] The present disclosure relates to a next-generation wireless communication system, and more particularly, to a method for allocating and transmitting different reference signals to a terminal, and a system, method, and apparatus for performing cell measurement and mobility management using the transmitted different reference signals in a beamforming-based system including one or more base stations and one or more terminals.

[0055] In addition, the present disclosure relates to a process of performing beam measurement according to conditions and performing beam measurement reporting according to conditions in a wireless system where a base station and a terminal using multiple antennas exist.

[0056] The present disclosure designs information, transmission methods and processes, in which, in a wireless communication system where base stations and terminals using multiple antennas exist, a serving base station or an adjacent base station sends reference signal configuration information for a beam measurement object (terminal) to the terminal, so as to observe and measure reference signals sent from the serving base station and the adjacent base station in a system and environment using beamforming (specifically, beamforming using multiple antennas).

[0057] In addition, the present disclosure designs information, transmission methods and processes, wherein in a wireless communication system in which there are base stations and terminals using multiple antennas, a serving base station or a neighboring base station sends additional second reference signal configuration information for a beam measurement object (terminal) to the terminal, so that in a system and environment using beamforming (specifically beamforming using multiple antennas), if there is an additional second reference signal in addition to the presence of a first reference signal sent from the serving base station and the neighboring base station, then in addition to basically observing and measuring the first reference signal, the additional second reference signal is also observed and measured.

[0058] Existing technology: Traditional LTE CSI-RS configuration

[0059] The structure and elements of CSI-RS config. in the existing LTE standard are as follows.

[0060]

[0061] Antenna ports [TS36.211, Section 6.10.5]

[0062] - Number of antenna ports used for RS Tx.

[0063] Resources [TS36.211, Section 6.10.5.2-1]

[0064] - Map RS to RE

[0065] Subframe [TS36.211, Section 6.10.5.3-1]

[0066] -RS periodicity

[0067] -Subframe offset

[0068] pC [TS 36.213, Section 7.2.5]

[0069] -UE assumptions about the reference physical downlink shared channel (PDSCH) transmit power used for CSI feedback

[0070] Prior art: Discovery RS (DRS) configuration based on traditional LTE CSI-RS

[0071] The structure and elements of the CSI-RS-based DRS config. in the existing LTE standard are as follows.

[0072]

[0073] Physical cell ID

[0074] -The RS / SS cell assumed by the UE corresponds to

[0075] Scrambled ID

[0076] - Parameters of the pseudo-random sequence generator

[0077] Resources (=same as RS-Config.)

[0078] Subframe offset

[0079] RS-Single offset

[0080] - Individual offsets to specific RS resources

[0081] Considering RS type and architecture

[0082] The terminal can measure the reference signal transmitted by the beam scanning configuration so that the base station transmits the beam alternately using different antenna configurations. The reference signals being considered are synchronization signals and channel state information reference signals (CSI-RS), but are not necessarily limited thereto.

[0083] Figure 1 A transmitted reference signal according to an embodiment of the present disclosure is shown.

[0084] refer to Figure 1 , a reference signal (RS) may include a burst set transmitted at a certain period, a burst transmitted continuously or at a certain interval in a corresponding burst set, and a block transmitted continuously or at a certain interval in a corresponding burst. In this case, each block may use the same or different antenna configurations to transmit beamformed signal information, and the unit of beam scanning for transmitting RS by changing the beams may be a block, a burst, or a burst set.

[0085] In addition, in another embodiment of the present disclosure, different types of reference signals can be Figure 2 As shown, the reference signals may have the same period and may be sent using different frequency bands on the same time resources. Even in this case, different types of reference signals may include burst sets sent at a certain period, bursts sent continuously or at a certain interval in a corresponding burst set, and blocks sent continuously or at a certain interval in a corresponding burst. In this case, each block may use the same or different antenna configurations to send beamformed signal information, and the unit of beam scanning for sending RS by changing these beams may be a block, a burst, or a burst set.

[0086] Figure 2 Different types of reference signals with different numbers of blocks in the same time resource according to an embodiment of the present disclosure are shown.

[0087] refer to Figure 2 , different types of reference signals can have different numbers of blocks in the same time resource. Figure 2 An example is shown in which two RS type 2 blocks exist corresponding to one RS type 1 block, but the number is not limited thereto but may be considered in various ways.

[0088] Figure 3 It shows different types of reference signals sent with the same period using the same frequency band in different time resources according to an embodiment of the present disclosure.

[0089] refer to Figure 3 In another embodiment of the present disclosure, different types of reference signals may be Figure 3 As shown, the reference signals have the same period and can be sent using the same frequency band on different time resources. Even in this case, different types of reference signals may include burst sets sent at a certain period, bursts sent continuously or at a certain interval in a corresponding burst set, and blocks sent continuously or at a certain interval in a corresponding burst. In this case, each block may use the same or different antenna configurations to send beamformed signal information, and the unit of beam scanning for sending RS by changing these beams may be a block, a burst, or a burst set.

[0090] Furthermore, different kinds of reference signals may independently have different periods without being correlated with each other, and may be transmitted on different time and frequency resources.

[0091] Figure 4 It shows RSs transmitted with different periods using the same frequency band in different time resources according to an embodiment of the present disclosure.

[0092] B. Elements from the network to the UE for RS measurement configuration

[0093] If there are a serving base station and a neighboring base station capable of transmitting different kinds of RSs, the network may provide the terminal with the following information so as to measure the corresponding RS (or a certain RS).

[0094] The content to be described in the present disclosure may not be limited to a certain RS, but may be one of certain RSs that can be configured by the network. The RSs that can be considered currently are as follows, but the present disclosure is not limited thereto: synchronization signal (PSS, SSS or any other RS), cell-specific RS, beam-specific RS, beam refinement RS, CSI-RS, DRS and DM-RS.

[0095] οCell Information

[0096] -Cell ID

[0097] o Physical cell ID, logical cell ID, virtual cell ID

[0098] -Scrambled ID

[0099] οParameters of the pseudo-random sequence generator

[0100] -Cell offset

[0101] o Subframe offset between serving cell and target measurement cell

[0102] o Frequency offset between the serving cell and the target measurement cell

[0103] o Timing offset between serving cell and target measurement cell

[0104] οSymbol / slot boundary offset between serving cell and target measurement cell

[0105] Frequency information

[0106] - Frequency channel ID, frequency ID, ARFCN, carrier ID, subcarrier ID, ...

[0107] RS resource information

[0108] - Antenna port for RS tx

[0109] ο Number of antenna ports, antenna port ID, ...

[0110] - Resource mapping information

[0111] o Used by UE to distinguish REs used to receive specific RS

[0112] That is, resource mapping of CSI-RS to RE

[0113] -Number of blocks in a burst (Nblock)

[0114] -Number of bursts in a burst set (Nburst)

[0115] -Subframe information

[0116] To specify a subframe containing RS

[0117] 〉In LTE, the subframe containing the CSI reference signal should satisfy

[0118]

[0119] 〉In terms of the number of subframes, time, number of symbols, number of TTIs, number of slots, number of mini-slots, number of PDCCH TTIs, etc.

[0120] -Periodicity

[0121] o Periodicity of burst sets in terms of number of subframes, time, number of symbols, number of TTIs, number of slots, number of mini-slots, number of PDCCH TTIs, etc.

[0122] o Periodicity of bursts within a burst set in terms of number of subframes, time, number of symbols, number of TTIs, number of slots, number of mini-slots, number of PDCCH TTIs, etc.

[0123] o Periodicity of blocks within a burst in terms of number of subframes, time, number of symbols, number of TTIs, number of slots, number of mini-slots, number of PDCCH TTIs, etc.

[0124] - RS offset (within the cell, i.e. from the serving cell or from the target cell)

[0125] o Offset between CSI-RS (target RS) block and SS (preconfigured RS) block

[0126] o Offset between CSI-RS (target RS) bursts relative to SS (preconfigured RS) blocks

[0127] oOffset between CSI-RS (target RS) burst sets relative to SS (preconfigured RS) bursts

[0128] oOffset between CSI-RS (target RS) burst set relative to SS (preconfigured RS) burst set

[0129] o The offset may be a time offset and / or a frequency offset

[0130] Other information

[0131] -instruct

[0132] The RS information is exactly the same as the RS of the serving cell.

[0133] oRS information can be used for L3 mobility (to trigger measurement reports)

[0134] -Index(s) from another RS

[0135] o If the network wants the UE to measure a portion of (one or more than one) RS from another RS

[0136] > Another RS ​​should have been configured to the UE

[0137] >UE should know the index of RS within the other RS

[0138] o The index(es) may be a block index, a burst index or a burst set index from the other RS ​​- a subframe number

[0139] o Absolute value used to specify subframe for precise timing

[0140] -Number of allocated CSI-RS

[0141] - Size of the allocated CSI-RS

[0142] - Number of beams to be considered for derivation of cell level measurements (N)

[0143] In order to select a better cell by comparing the cells, a representative value of the measurement value of each cell is necessary. In order to derive such a representative value in a beamforming system, for example, N best reference signal measurement values ​​are selected from all reference signals beamformed and transmitted with different beams, and an average value of reference signal measurement values ​​that satisfy a certain condition (the measurement value is within the offset of the measurement value of the best beam or the measurement value is equal to or greater than a certain absolute threshold) is obtained to calculate the representative value of the cell.

[0144] In the case of deriving a cell representative value using one or more reference signal measurement values ​​as described above, for pairwise comparison, the base station can transmit a measurement configuration for causing the terminal to measure a certain reference signal using N reference signal measurement values ​​to be considered when calculating the cell representative value using the corresponding reference signal.

[0145] The network may configure the RS measured by the terminal by providing all or part of various information to the corresponding terminal, and hereinafter, various embodiments will be described.

[0146] C. Network UE measurement configuration method

[0147] If there are serving base stations and neighboring base stations that transmit RSs that the terminal can receive and measure, in order for the terminal to measure the corresponding RSs, the network may provide the terminal with RS information transmitted by the corresponding serving base station and neighboring base stations according to the following method.

[0148] C-1. Measurement configuration based on dedicated signaling (i.e., RRC / MAC / PHY signaling)

[0149] Method for serving base station to directly provide RS information of serving cell and target cell to be measured to home terminal

[0150] Basically, a method for sending unicast type messages to each terminal independently is considered. If it is possible to additionally bind and designate one or more terminals as a group, it is also possible to send multicast type messages to multiple terminals at the same time.

[0151] As an embodiment of the present disclosure, the base station may configure a CSI-RS based on dedicated signaling to the terminal for channel information measurement and report to the base station. The corresponding CSI-RS may be valid only for a specific terminal, and the base station may configure the specific terminal by selecting antenna configuration, transmit power and resources. This information may be transmitted to the corresponding terminal in the form of RRC connection reconfiguration (RRCConnectionReconfiguration), MAC message or PHY message through various methods.

[0152] In the above-mentioned embodiments of the present disclosure, the CSI-RS to be sent by the base station to the terminal is information valid only in the cell, and may be information that does not need to be measured or estimated by other terminals belonging to adjacent cells. Therefore, the base station may configure the CSI-RS including the following information to the terminal in a dedicated signaling method for measuring the channel within the cell. In a multi-beam forming environment, the CSI-RS may be designed to even include the case where each CSI-RS is sent with different antenna configurations and different beams.

[0153] Furthermore, the signals actually considered and transmitted may be transmitted to include all or part of the following configurations.

[0154] CSI-RS Config.

[0155] - This CSI-RS is only used as an indicator within the cell (intra-cell)

[0156] If this indicator is off, the CSI-RS is also used for inter-cell

[0157] -Indicator that this CSI-RS is only valid for a specific UE

[0158] If this indicator is off, the CSI-RS is common and is used for non-UE-specific

[0159] - This CSI-RS is used as an indicator for beam refinement and scheduling

[0160] - Antenna port array, w / port number for each beam

[0161] - An array of the number of antenna ports used per beam

[0162] - Resource array for each beam

[0163] -Periodicity

[0164] οPeriodicity of CSI-RS burst sets

[0165] οPeriodicity of CSI-RS bursts within a CSI-RS burst set

[0166] οPeriodicity of CSI-RS blocks within a CSI-RS burst

[0167] -Offset: LTE considers the shift from SSS to CSI-RS

[0168] ο w / id (index, SFN) of the original SS (block / burst / burst set)

[0169] ο w / id of target CSI-RS type (block / burst / burst-set)

[0170] οOffset from SS (block / burst / burst set) to CSI-RS (block / burst / burst set)

[0171] The above-mentioned offset can be a time offset and / or a frequency offset.

[0172] -CSI-RS block size

[0173] οThe actual size of the CSI-RS block, in terms of the smallest unit

[0174] That is, the ratio of the CSI-RS block / symbol / s-frame size to the symbol size.

[0175] ο Ratio of CSI-RS block / symbol / s-frame size relative to NR-SS size

[0176] A bitmap of ο(..., 0.25, 0.5, 1, 2, 3, ...)

[0177] -Gaps between CSI-RS blocks

[0178] οConsider whether there is separation

[0179] οWindow for CSI-RS measurement

[0180] οThe number of CSI-RS that can be measured in one window

[0181] ο Duration of the measurement window

[0182] -pC

[0183] -Index (or array of indices) from other RS ​​beams

[0184] -Beam information

[0185] o Beam ID (or SS block / burst / burst set ID)

[0186] Please note that the above-mentioned “beam” can be replaced by a CSI-RS measurement unit, such as a CSI-RS block, a CSI-RS burst, or a CSI-RS burst set.

[0187] As another embodiment of the present disclosure, the base station may configure a CSI-RS based on dedicated signaling to the terminal, which is not only used for channel information measurement and reporting to the base station, but also for neighboring cell information measurement. The corresponding CSI-RS may include not only serving cell information, but also neighboring cell configuration information, and may be valid only for specific terminals. Even for many unspecified terminals, the base station may configure the many unspecified terminals by selecting antenna configuration, transmit power, and resources. This information may be transmitted to the corresponding terminal in the form of RRC connection reconfiguration (RRCConnectionReconfiguration), MAC message, or PHY message through various methods.

[0188] In the above-mentioned embodiments of the present disclosure, the CSI-RS transmitted by the base station to the terminal is information that is valid not only in the cell but also in the neighboring cell, and can be information for the terminal belonging to the serving cell to measure or estimate the CSI-RS transmitted by the neighboring cell. Therefore, if the corresponding CSI-RS is configured, the terminal should know that the corresponding CSI-RS includes neighboring cell information, and should recognize that it can include additional information for successfully receiving the signal transmitted by the serving cell.

[0189] For example, the base station may configure a CSI-RS including the following information to the terminal in a dedicated signaling method for measuring channels within the cell. In a multi-beamforming environment, the CSI-RS may be designed to even include the case where each CSI-RS is transmitted with different antenna configurations and different beams.

[0190] Community information

[0191] -Cell ID

[0192] o Physical cell ID, logical cell ID, virtual cell ID

[0193] -Scrambled ID

[0194] οParameters of the pseudo-random sequence generator

[0195] -Cell offset

[0196] o Subframe offset between serving cell and target measurement cell

[0197] o Frequency offset between the serving cell and the target measurement cell

[0198] o Timing offset between serving cell and target measurement cell

[0199] οSymbol / slot boundary offset between serving cell and target measurement cell

[0200] Frequency information

[0201] - Frequency channel ID, frequency ID, ARFCN, carrier ID, subcarrier ID, ...

[0202] - Frequency offset (from the reference point of the radio frame, from the SS block / burst / burst set)

[0203] Beam information

[0204] -Beam ID (or SS block / burst / burst set ID)

[0205] οOther information

[0206] -instruct

[0207] The RS information is exactly the same as the RS of the serving cell.

[0208] oRS information can be used for L3 mobility (to trigger measurement reports)

[0209] - Number of CSI-RS blocks within a CSI-RS burst / burst set

[0210] -The number of CSI-RS bursts in a CSI-RS burst set

[0211] -Index(s) from another RS

[0212] o If the network wants the UE to measure a portion of (one or more than one) RS from another RS

[0213] > Another RS ​​should have been configured to the UE

[0214] >UE should know the index of RS within the other RS

[0215] o The index(es) may be a block index, a burst index or a burst set index from the other RS ​​- a subframe number

[0216] o Absolute value used to specify subframe for precise timing

[0217] - Number of beams to be considered for cell level measurement derivation (N)

[0218] o In order to select a better cell by comparing the cells, a representative value of the measurement value of each cell is necessary. In order to derive such a representative value in a beamforming system, for example, N best reference signal measurement values ​​are selected from all reference signals beamformed and transmitted with different beams, and an average value of reference signal measurement values ​​satisfying a certain condition (the measurement value is within the offset of the best beam measurement value or the measurement value is equal to or greater than a certain absolute threshold) is obtained to calculate the representative value of the cell.

[0219] o In the case of deriving a cell representative value using one or more reference signal measurement values ​​as described above, for pairwise comparison, the base station may transmit a measurement configuration for causing the terminal to measure a certain reference signal using N reference signal measurement values ​​to be considered when calculating the cell representative value using the corresponding reference signal.

[0220] Please note that the above-mentioned “beam” can be replaced by a CSI-RS measurement unit, such as a CSI-RS block, a CSI-RS burst, or a CSI-RS burst set.

[0221] Hereinafter, a method for more accurately and easily allocating RS resources to be configured using an offset between a pre-existing RS (synchronization signal (SS)) and an RS to be configured (CSI-RS) will be described with reference to the accompanying drawings.

[0222] Figure 5A , Figure 5B and Figure 5C A resource allocation method when the CSI-RS to be configured is associated with a pre-existing SS according to various embodiments of the present disclosure is shown.

[0223] refer to Figure 5A , Figure 5B and Figure 5C , it can be seen that if the CSI-RS to be configured is related to a pre-existing SS, such resource allocation can be easily performed using an offset instead of a specific subframe number. The corresponding CSI-RS configuration information may exist in the broadcast channel (PBCH) shown or in a control channel / data channel (PDCCH / PDSCH) specified by the PBCH, and may be sent to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0224] In addition, the corresponding CSI-RS configuration information is divided, and a part of it may be present in the PBCH, and another part of it may be present in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH. In addition, another part of it may be sent to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0225] Figure 5A A method for allocating CSI-RS burst set resources to offsets based on SS burst sets, a method for allocating CSI-RS burst resources to offsets based on SS bursts, and a method for allocating CSI-RS block resources to offsets based on SS blocks are shown.

[0226] Figure 5BA method for allocating CSI-RS burst set resources to time and frequency offsets based on SS burst sets, a method for allocating CSI-RS burst resources to time and frequency offsets based on SS bursts, and a method for allocating CSI-RS block resources to time and frequency offsets based on SS blocks are shown. The corresponding figures show a method for allocating CSI-RS resources occupying different frequencies on the same time resources.

[0227] Figure 5C The method of allocating different CSI-RS resources to time and frequency offsets based on CSI-RS is shown. The corresponding figure shows a method for allocating CSI-RS resources occupying different frequencies on the same time resource.

[0228] Example 1

[0229] CSI-RS config. can be in the form of all or part of the following sequence.

[0230]

[0231] intra-cellUseInd BOOLEAN,

[0232] Indicates whether the corresponding CSI-RS is dedicated to the cell and whether it can be used for handover between cells

[0233] physCellID INTEGER(0…N_pcid),

[0234] The cell ID that belongs to the corresponding CSI-RS

[0235] antennaPortsCount ENUMERATED{an1, an2, an4, an8, an16,…N_ancnt},

[0236] Corresponding CSI-RS transmission antenna port configuration

[0237] resourceConfigList ResourceConfigList,

[0238] Corresponding CSI-RS transmission resource location (list)

[0239] subframeConfigList SubframeConfigList,,

[0240] Corresponding CSI-RS transmission subframe position (list)

[0241] freqConfigList FreqConfigList,

[0242] Corresponding CSI-RS transmission frequency and subcarrier position (list)

[0243] For example, it may mean the relative time interval between (multiple) NR-SSs in a subframe / time slot / symbol including a PBCH sent using the same or similar antenna configuration structure as that used by the base station when sending the corresponding CSI-RS.

[0244] timeOffset INTEGER(0…N_to),

[0245] The relative time interval between the corresponding CSI-RS transmission subframe / time slot / symbol and the NR-SS associated with the corresponding config. (PBCH - belongs to the terminal or is measured by the terminal)

[0246] frequencyOffset INTEGER(-Nfo1…N_fo2),

[0247] The relative frequency between the corresponding CSI-RS transmission subframe / time slot / symbol and the NR-SS associated with the corresponding config. (PBCH - belongs to the terminal or is measured by the terminal) and the subcarrier spacing

[0248] periodicity INTEGER(0…N_prd),

[0249] Corresponding CSI-RS transmission period (same next CSI-RS transmission scheduling time)

[0250] pC INTEGER(-N_negpc…N_pospc),

[0251] UE assumptions on reference PDSCH transmit power for CSI feedback

[0252] measUnit INTEGER(0…N_munit),

[0253] Corresponding CSI-RS measurement units (slot, symbol, subframe, subsymbol, mini-slot, ...)

[0254] Ratio indication: can be expressed as a multiple of the smallest unit, or as a ratio to a reference unit (NR-SS size)

[0255] Indicator Indicator:: can be expressed with an indicator that maps 1:1 on each unit of measurement

[0256] numberofmeasUnits INTEGER(0…N_munits),

[0257] Number of CSI-RS units that need to be measured and correlated to the reference NR-SS

[0258] measGap INTEGER(0...N_mgap),

[0259] The spacing between CSI-RS that needs to be measured and correlated to the reference NR-SS

[0260] measWindow INTEGER(0...N_mwindow),

[0261] Total CSI-RS measurement time relative to the reference NR-SS

[0262] csi-rs-IDList CSI-RS-IDList

[0263] Corresponding CSI-RS ID list (beam ID list, scrambling ID list)

[0264] QCL-ID

[0265] The ID of the specific QCL in which the corresponding CSI-RS has the QCL

[0266] QCL is an abbreviation of quasi co-location, and indicates that certain characteristics between two different signals are identical (or almost similar) to each other. "Time QCL" indicates that time synchronization is identical (or almost similar) to each other, "frequency QCL" indicates that frequency synchronization is identical (or almost similar) to each other, and "spatial QCL" indicates that transmission / reception directions are similar to each other. It can be assumed that the transmission / reception ends of two different signals with the same time, frequency, and spatial QCL use a configuration and beam of a directional antenna existing in the same physical location and having the same direction, and in the present disclosure, QCL is defined as the correlation between signals that can be transmitted / received using the same beam.

[0267] QCLed-NR-SS-ID

[0268] The corresponding CSI-RS is the ID (NR-SS block index) of a specific NR-SS with QCL. A terminal that has configured the corresponding CSI-RS can receive the corresponding CSI-RS using a receiving beam that has the best performance among the receiving beams used to measure the NR-SS (blocks, bursts, and burst sets) consistent with the QCLed-NR-SS-ID. Through such an operation, the terminal receives the CSI-RS multiple times while changing the receiving beam, omitting the operation of searching for the receiving beam through which the best CSI-RS can be received and the receiving CSI-RS performance, and can immediately find the best CSI-RS performance using the terminal beam for receiving NR-SS. In this way, the terminal can reduce power consumption and measurement delay.

[0269] QCLed-CSI-RS-ID

[0270] The corresponding CSI-RS is the ID of a specific QCLed-CSI-RS with QCL. A terminal that has configured the corresponding CSI-RS can receive the corresponding CSI-RS using a receiving beam that has the best performance among the receiving beams used to measure the QCLed-CSI-RS consistent with the QCLed-CSI-RS-ID. Through such an operation, the terminal receives the CSI-RS multiple times while changing the receiving beam, omitting the operation of searching for the receiving beam through which the best CSI-RS can be received and the receiving CSI-RS performance, and can immediately find the best CSI-RS performance using the terminal beam for receiving the QCLed-CSI-RS. In this way, the terminal can reduce power consumption and measurement delay.

[0271] Num-CSI-RS-per-NR-SS

[0272] The number of CSI-RS beams associated with QCLed NR-SS.

[0273] The corresponding number of beams can be used as the following example to find the timing of CSI-RS.

[0274] Sensing the reference point timing of the CSI-RS to be transmitted after an offset from the QCLed NR-SS.

[0275] Sensing the reference point timing of the CSI-RS to be transmitted after an offset from the QCLed NR-SS.

[0276] The terminal can identify that the number of CSI-RS from the corresponding reference point is Num-CSI-RS-per-NR-SS and is associated with one NR-SS with QCL. Using this information, the terminal can realize that the antenna configuration structure and direction used by the base station to send the corresponding CSI-RS are the same or similar to the antenna configuration structure and direction used to send one NR-SS, and even if there is no other information, the terminal can consider this CSI-RS and NR-SS associated with QCL between this CSI-RS and NR-SS. This association can be achieved by providing only three kinds of digital information, such as the starting number of the CSI-RS index, the starting number of Num-CSI-RS-per-NR-SS, and the starting number of the NR-SS index, and the terminal can easily grasp what CSI-RS is associated with the corresponding NR-SS with QCL. For example, starting from the index starting number, the CSI-RS can be grouped according to the number of Num-CSI-RS-per-NR-SS, and each group is associated with one NR-SS index with QCL.

[0277] Numerology-ID

[0278] Send the corresponding CSI-RS numerology ID.

[0279] The NR-SS ID or CSI-RS ID may be replaced with a parameter calling the ID of some other reference signal RS.

[0280] Embodiment 2:

[0281] CSI-RS config. can be in the form of all or part of the following sequence.

[0282]

[0283] CSI-RS-ID

[0284] Corresponding CSI-RS ID (beam ID, scrambling ID)

[0285] QCL-ID

[0286] The ID of the specific QCL in which the corresponding CSI-RS has the QCL

[0287] QCLed-NR-SS-ID

[0288] The corresponding CSI-RS is the ID (NR-SS block index) of a specific NR-SS with QCL. A terminal that has configured the corresponding CSI-RS can receive the corresponding CSI-RS using a receiving beam that has the best performance among the receiving beams used to measure the NR-SS (blocks, bursts, and burst sets) consistent with the QCLed-NR-SS-ID. Through such an operation, the terminal receives the CSI-RS multiple times while changing the receiving beam, omitting the operation of searching for the receiving beam through which the best CSI-RS can be received and the receiving CSI-RS performance, and can immediately find the best CSI-RS performance using the terminal beam for receiving NR-SS. In this way, the terminal can reduce power consumption and measurement delay.

[0289] QCLed-CSI-RS-ID

[0290] The corresponding CSI-RS is the ID of a specific QCLed-CSI-RS with QCL. A terminal that has configured the corresponding CSI-RS can receive the corresponding CSI-RS using a receiving beam that has the best performance among the receiving beams used to measure the QCLed-CSI-RS consistent with the QCLed-CSI-RS-ID. Through such an operation, the terminal receives the CSI-RS multiple times while changing the receiving beam, omitting the operation of searching for the receiving beam through which the best CSI-RS can be received and the receiving CSI-RS performance, and can immediately find the best CSI-RS performance using the terminal beam for receiving the QCLed-CSI-RS. In this way, the terminal can reduce power consumption and measurement delay.

[0291] Numerology-ID

[0292] Send the corresponding CSI-RS numerology ID.

[0293] Example 3:

[0294] CSI-RS config. can be in the form of all or part of the following sequence.

[0295]

[0296] NR-SS-based-time-offset

[0297] If the timing of the corresponding CSI-RS is an offset value corresponding to the offset from the specific NR-SS.

[0298] Here, the specific NR-SS is an NR-SS in which the corresponding CSI-RS has QCL, and such information may be implicitly known through observation of the terminal or may be explicitly included in the QCLed-NR-SS-ID to be transmitted.

[0299] NR-SS-offset-indicator

[0300] An indicator indicating that the timing offset of the corresponding CSI-RS is an offset from a specific NR-SS with QCL. If true, the timing of the corresponding CSI-RS corresponds to the offset from the specific NR-SS with QCL relationship with the corresponding CSI-RS, and if false, the timing of the corresponding CSI-RS corresponds to the offset value from the frame boundary (radio frame, time slot, symbol, ...).

[0301] CSI-RS-RE-mapping

[0302] The corresponding CSI-RS is enabled to know the index of the mapping rule for searching the RE being transmitted. If a specific method (table) is specified in the standard, the terminal and the base station can successfully and efficiently share the mapping by exchanging indexes.

[0303] Periodicity-ID

[0304] The corresponding CSI-RS indicates the index of the repetition period or the actual value of the period.

[0305] Example 4:

[0306] CSI-RS config. can be in the form of all or part of the following sequence.

[0307]

[0308] The above-described embodiment corresponds to an example in which the maximum amount of common information that each CSI-RS resource has is transmitted from the cell config. and individual information that only each CSI-RS has is provided in the form of a list.

[0309] Example 5: Transmission of all resource information

[0310] According to this embodiment of the present disclosure, when the base station configures the terminal to observe the CSI-RS, the resources of all CSI-RS are configured separately.

[0311]

[0312] Embodiment 6 Transmission based on NR-SS connection relationship

[0313] When configuring the terminal to observe CSI-RS, the base station can enable the terminal to identify the resources of the corresponding RS (hereinafter referred to as CSI-RS) according to the correlation with a certain reference RS (NR-SS or CSI-RS, hereinafter referred to as NR-SS). In this embodiment of the present disclosure, CSI-RS with the same offset relative to all reference NR-SSs are configured without notifying the ID of the reference NR-SS associated with a specific CSI-RS. In the corresponding embodiment of the present disclosure, Figure 5A The correlation is shown.

[0314]

[0315] A terminal that has received (configured) CSI-RS config. can grasp the rules for configuring one or more CSI-RS relative to the cell to which the corresponding CSI-RS is configured when using this embodiment. In this case, one or more CSI-RS may consist of common information (periodicity, NR-SS in QCL relationship, scrambling ID, digital science, and antenna port) and independent information (CSI-RS transmission position and antenna port). The terminal can refer to the configuration information to grasp the independent information, or can distinguish and receive each CSI-RS by using a certain operation of the parameters provided from the configuration information. As an example of such an operation, the terminal can grasp and measure the CSI-RS position in the following way.

[0316] 1) Understand the CSI-RS transmission reference point that is offset (time / frequency) from the measured NR-SS interval

[0317] 2) Understand the necessity of receiving a CSI-RS with a measUnit size from the corresponding reference point

[0318] 3) Understand the necessity of receiving a total number of measUnits CSI-RS

[0319] 4) Understand the measGap between each CSI-RS

[0320] 5) Master each CSI-RS ID from csi-rs-IDList

[0321] 6) Master the retransmission of each CSI-RS on the same frequency resource in periodic units

[0322] Example 7 Transmission based on NR-SS connection relationship

[0323] When configuring the terminal to observe CSI-RS, the base station can enable the terminal to identify the resources of the corresponding RS (hereinafter referred to as CSI-RS) according to the correlation with a certain reference RS (NR-SS or CSI-RS, hereinafter referred to as NR-SS). In this embodiment of the present disclosure, one or more CSI-RS with the same offset relative to all reference NR-SSs are configured in a one-to-many manner without notifying the ID of the reference NR-SS associated with a specific CSI-RS. In the corresponding embodiment of the present disclosure, Figure 5B and 5C The correlation is shown.

[0324]

[0325] Embodiment 8: Transmission of a connection relationship based on NR-SS and an NR-SS ID having the connection relationship

[0326] When configuring the terminal to observe CSI-RS, the base station can enable the terminal to identify the resources of the corresponding RS (hereinafter referred to as CSI-RS) according to the correlation with a certain reference RS (NR-SS or CSI-RS, hereinafter referred to as NR-SS). In this embodiment of the present disclosure, one or more CSI-RSs with different offsets relative to multiple reference NR-SSs are configured by notifying the ID of the reference NR-SS associated with a specific CSI-RS. In the corresponding embodiment of the present disclosure, Figure 5B and 5C The correlation is shown.

[0327]

[0328] The terminal having received the information can specify the CSI-RS resource from the NR-SS having the NR-SS ID, and can receive the CSI-RS related to the corresponding NR-SS using the UE Rx beam having the best performance when receiving the corresponding NR-SS.

[0329] Figure 6 A resource allocation method according to an embodiment of the present disclosure is shown when a CSI-RS to be configured is related to a pre-existing SS.

[0330] refer to Figure 6 , it can be seen that if the CSI-RS to be configured is related to a pre-existing SS, such resource allocation can be easily performed using an offset instead of a specific subframe number.

[0331] The corresponding CSI-RS configuration information may exist in the PBCH shown or in a control channel / data channel (PDCCH / PDSCH) specified by the PBCH, and may be sent to the terminal via a signal such as PHY / MSC / RRC / RLC.

[0332] In addition, the corresponding CSI-RS configuration information is divided, and a part of it may exist in the PBCH), and another part of it may exist in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH. In addition, another part of it may be sent to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0333] Figure 6 A method for allocating CSI-RS burst set resources to offsets based on SS bursts, a method for allocating CSI-RS burst set resources to offsets based on SS blocks, and a method for allocating CSI-RS burst resources to offsets based on SS blocks are shown.

[0334] Figure 7 A resource allocation method according to an embodiment of the present disclosure is shown when a CSI-RS to be configured is related to a pre-existing SS.

[0335] refer to Figure 7 , it can be seen that if the CSI-RS to be configured is related to a pre-existing SS, such resource allocation can be easily performed using an offset instead of a specific subframe number.

[0336] The corresponding CSI-RS configuration information may exist in the PBCH shown or in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH, and may be transmitted to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0337] In addition, the corresponding CSI-RS configuration information is divided, and a part of it may be present in the PBCH, and another part of it may be present in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH. In addition, another part of it may be sent to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0338] Figure 7 A method for allocating CSI-RS burst resources to offsets based on SS burst sets, a method for allocating CSI-RS block resources to offsets based on SS burst sets, and a method for allocating CSI-RS block resources to offsets based on SS bursts are shown.

[0339] Use the reference above FIG. 5A to FIG. 5C , Figure 6 and Figure 7 The base station may allocate CSI-RS resources to the terminal (or multiple terminals) according to the offset described above in the following method.

[0340] 1. Indication of the RS type of the reference (i.e., SS burst set = 0, SS burst = 1, SS block = 2) + offset (number of subframes / slots / symbols, time, frequency, ...)

[0341] • With this option, the UE can detect the CSI-RS block / burst / burst set based on the reference RS.

[0342] With this option, the UE can know that the CSI-RS for a specific resource will be transmitted by the same beam as the reference RS.

[0343] 2. Indication of the specific resource of the referenced RS type (i.e. the resource of the reference point of the SS burst set / burst / block) + offset (number of subframes / time slots / symbols, time, frequency, ...)

[0344] • With this option, the UE can detect the CSI-RS block / burst / burst set based on the reference resource location.

[0345] With this option, the UE can know that the CSI-RS for a specific resource will be transmitted by the same beam as the reference RS

[0346] That is, even if the reference resource is in the middle of the referenced RS, the CSI-RS will be transmitted on the same beam after the reference resource.

[0347] With this option, the network can only allocate part of the reference RS as CSI-RS.

[0348] 3. Indication of the specific resource of the referenced RS type (i.e., the resource of the reference point of the SS burst set / burst / block) + offset (number of subframes / time slots / symbols, time, frequency, ...) + end of the CSI-RS resource

[0349] • With this option, the UE can detect the CSI-RS block / burst / burst set based on the reference resource location.

[0350] With this option, the UE can know that the CSI-RS for a specific resource will be transmitted by the same beam as the reference RS

[0351] That is, even if the reference resource is in the middle of the referenced RS, the CSI-RS will be transmitted on the same beam after the reference resource.

[0352] With this option, the network can only allocate part of the reference RS as CSI-RS.

[0353] 4. Indication of reference RS type (i.e., SS burst set = 0, SS burst = 1, SS block = 2) + indication of CSI-RS (i.e., CSI-RS burst set = 0, CSI-RS burst = 1, CSI-RS block = 2) + offset (number of subframes / time slots / symbols, time, frequency, ...)

[0354] • With this option, the UE can detect the CSI-RS block / burst / burst set based on the reference RS.

[0355] With this option, the UE can know that the CSI-RS for a specific resource will be transmitted by the same beam as the reference RS.

[0356] 5. Indication of specific resource of referenced RS type (i.e., resource of reference point of SS burst set / burst / block) + indication of referenced RS type (i.e., SS burst set = 0, SS burst = 1, SS block = 2) + indication of CSI-RS (i.e., CSI-RS burst set = 0, CSI-RS burst = 1, CSI-RS block = 2) + offset (number of subframes / time slots / symbols, time, frequency, ...) + end of CSI-RS resource

[0357] • With this option, the UE can detect the CSI-RS block / burst / burst set based on the reference resource location.

[0358] With this option, the UE can know that the CSI-RS for a specific resource will be transmitted by the same beam as the reference RS

[0359] That is, even if the reference resource is in the middle of the referenced RS, the CSI-RS will be transmitted on the same beam after the reference resource.

[0360] • With this option, the network can allocate only a portion of the reference RS as CSI-RS.

[0361] C-2. Measurement configuration based on broadcast signals (main system information, system information, broadcast signal, multicast signal, ...)

[0362] A method in which a base station provides RS information of a corresponding cell to be measured to many unspecified terminals as a broadcast channel or a broadcast signal.

[0363] In an embodiment of the present disclosure, the terminal may include RS configuration information in a certain broadcast channel or broadcast message to be sent.

[0364] The CSI-RS information included in the corresponding message to be transmitted may be a part of the various pieces of information as described above.

[0365] Figure 8 , Fig. 9 and Fig.10 It is shown that a PBCH burst set according to various embodiments of the present disclosure uses an offset to configure a CSI-RS burst set, burst, and block.

[0366] refer to Figure 8 , Fig. 9 and Fig.10 If the CSI-RS to be configured in a certain broadcast channel is related to the corresponding broadcast channel (for example, if transmitted with the same beam or if occupying resource blocks of the same size), such resource allocation can be easily performed using an offset instead of a specific subframe number.

[0367] The corresponding CSI-RS configuration information may exist in the PBCH shown or in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH, and may be transmitted to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0368] In addition, the corresponding CSI-RS configuration information is divided, and a part of it may be present in the PBCH, and another part of it may be present in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH. In addition, another part of it may be sent to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0369] Figure 8 It may be shown that the PBCH blocks use offsets to configure CSI-RS burst sets, bursts, and blocks.

[0370] Fig. 9 It may be shown that PBCH bursts use offsets to configure CSI-RS burst sets, bursts, and blocks.

[0371] Fig.10 It may be shown that PBCH burst sets use offsets to configure CSI-RS burst sets, bursts, and blocks.

[0372] In this case, the terminal and the base station (according to the standard) can know by default that the corresponding configuration resources use the beam of the same base station as the PBCH, or an indicator can be given and the base station can generally know through the corresponding indicator (for example, 1 bit) that the corresponding configuration resources use the beam of the same base station as the PBCH.

[0373] In addition, PDSCH is a signal that is continuously transmitted in a cell in a short cycle, and in order to save power, it may not include the corresponding CSI-RS every time. In this case, whether the corresponding PDSCH includes CSI-RS can be indicated by 1 bit to be transmitted to PBCH.

[0374] If the goal is to maximize power saving, the PBCH may include the minimum information required for CSI-RS detection, such as offset, and may not include other information.

[0375] Fig.11A and Fig. 11B It is shown that a base station according to various embodiments of the present disclosure occupies downlink resources to send configuration information for CSI-RS measurement using a broadcast channel and sends the configuration information for CSI-RS measurement to a terminal through corresponding downlink resources.

[0376] refer to Fig.11A The base station may occupy downlink resources to send configuration information for CSI-RS measurement using a certain broadcast channel, and may configure the information for CSI-RS measurement to many unspecified terminals (or specific terminals) through corresponding downlink resources.

[0377] The corresponding CSI-RS configuration information may exist in the PBCH shown or in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH, and may be transmitted to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0378] In addition, the corresponding CSI-RS configuration information is divided, and a part of it may be present in the PBCH, and another part of it may be present in a certain control channel / data channel (PDCCH / PDSCH) specified by the PBCH. In addition, another part of it may be sent to the terminal through a signal such as PHY / MSC / RRC / RLC.

[0379] In the PBCH, a certain indicator indicating a control channel or a data channel (PDCCH / PDSCH), resource scheduling information, and corresponding resources (PDCCH / PDSCH) including CSI-RS allocation information may be included.

[0380] refer to Fig. 11B , a frame structure and procedure, in which common information of CSI-RS is configured through a broadcast channel and detailed information of CSI-RS is configured using a dedicated PHY / MAC / RLC / RRC signal, and the terminal combines these two types of information to measure CSI-RS.

[0381] according to Fig. 11BIn the embodiment shown, the network provides the common information that the CSI-RS resource has through a broadcast channel, and uses a dedicated signal PHY / MAC / RLC / RRC to provide detailed CSI-RS resource configuration information. In the corresponding embodiment of the present disclosure, PBCH is used to provide the offset between NR-SS and CSI-RS bursts (or burst sets), and detailed CSI-RS measurement units, quantities, and CSI-RS transmission antenna port information are provided as dedicated signals.

[0382] The network may even disperse any CSI-RS configuration information not according to the above-described embodiments to the terminal through a broadcast channel, a control channel, or a data channel, and provide the dispersed information to the terminal.

[0383] C-3. Measurement configuration based on self-discovery signal

[0384] A method in which a base station does not provide RS information of a corresponding cell to be measured to many unspecified terminals through signal transmission, but the terminal itself discovers the measurement configuration using a method specified in the standard.

[0385] As an embodiment of the present disclosure, if a certain RS is discovered, the terminal itself can discover and measure CSI-RS resources.

[0386] 1. Specification of a fixed offset to discover the CSI-RS block / burst / burst set based on the SS block / burst / burst set resources.

[0387] Fig.12 The present invention is a flowchart showing a method for reporting a measurement result according to RS configuration of a serving base station for a terminal, RS measurement of the configured terminal, and a condition of the terminal according to an embodiment of the present disclosure.

[0388] refer to Fig.12 , you can observe the different RS configurations of the serving base station for the terminal, the RS measurements of the configured terminal, and the measurement result reports according to the conditions of the terminal. FIG. 5A to FIG. 5C It can be seen that in operation S1201, the serving base station can configure different RS information to the terminal for measurement purposes, and further, the condition for sending a measurement report (MR) can be configured. As configured, the terminal attempts measurement of different RSs in operation S1202, observes the condition for sending the measurement report as configured in operation S1203, and reports the measurement result in operation S1204 if the condition is met.

[0389] The measurement report or RS type 2 configuration request message may include the measurement result of the configured RS, the corresponding measurement result is managed by the measurement object ID, and both the base station and the terminal can identify which RS the measurement result is for through the corresponding ID.

[0390] Fig.13 An embodiment related to a case where a serving base station configures information about different RSs to a terminal according to an embodiment of the present disclosure is shown.

[0391] refer to Fig.13 In operation S1301, the serving base station configures information about different RSs to the terminal. In operation S1302, the terminal that has been configured with information about different RSs basically continuously performs measurements (RS type 1, i.e., synchronization signal) for one RS relative to the serving cell and the neighboring cell, and if a certain condition (condition_type 2) is met in operation S1303, then in operation S1304, the terminal additionally performs measurements of different types of RS type 2.

[0392] from Fig.13 It can be seen that the serving base station can configure different RS information to the terminal for measurement purposes, and can also configure a certain condition (condition_type 2) for performing measurements on different types of RS. In addition, conditions for sending a measurement report (hereinafter referred to as MR) can also be configured. Condition_type 2 can be the same as or different from condition_MR, and the detailed conditions of condition_type 2 can be sent using the existing LTE A1 to A6 types.

[0393] The measurement configuration for RS type 2 (ie, CSI-RS) may notify the terminal that condition_type 2 is included by including a certain indication (ie, indication_condition_type 2), and if such indication and condition are included, the terminal may measure the corresponding RS if the condition is satisfied.

[0394] In addition, in an embodiment of the present disclosure, if there is no Condition_Type 2, and although measurement configuration for RS Type 2 (i.e., CSI-RS) has been performed, no measurement report trigger event is specifically specified for the corresponding RS, if a certain condition (Condition_Type 2) is met according to the terminal's own conditions, the terminal can perform measurement of RS Type 2.

[0395] In operation S1305 , the terminal attempts measurement on different RSs as configured, observes a condition for sending a measurement report as configured based on the measurement result, and if the condition is met, reports the measurement result in operation S1306 .

[0396] The measurement report or RS type 2 configuration request message may include the measurement result of the configured RS, and the corresponding measurement result is managed by the measurement object ID, and both the base station and the terminal can identify for which RS the measurement result is through the corresponding ID.

[0397] If there are one or more other RSs related to the corresponding RS (e.g., NR-SS) QCL, the base station may configure the corresponding RS as RS type 2 to the terminal and may request measurement.

[0398] Fig.14 2 is a flowchart illustrating an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure.

[0399] refer to Fig.14 , in operation S1401, the serving base station configures the terminal with information about RS type 1. In operation S1402, the terminal that has been configured with information about RS type 1 basically continuously performs measurement (RS type 1, i.e., synchronization signal) for the corresponding RS relative to the serving cell and the neighboring cell, and if a certain condition (condition_type 2) is met in operation S1403, then in operation S1404, the terminal performs uplink transmission including an RS type 1 measurement result report or an RS type 2 configuration request.

[0400] The measurement report or RS type 2 configuration request message may include the measurement result of the configured RS type 2, the corresponding measurement result is managed by the measurement object ID, and both the base station and the terminal can identify which RS the measurement result is for through the corresponding IE.

[0401] If there are one or more other RSs (e.g., CSI-RS) related to the corresponding RS (e.g., NR-SS) QCL, the base station can configure the corresponding RS as RS type 2 to the terminal and can request measurement.

[0402] from Fig.14 It can be seen that in step 1405, the serving base station can configure a condition (condition_type 2) to the terminal with respect to the measurement result of a specific RS (type 1, i.e., synchronization signal) for the purpose of configuring a certain RS (type 2, i.e., CSI-RS) to the corresponding terminal. In addition, a condition for sending a measurement report (hereinafter referred to as MR) can also be configured. Condition_type 2 can be the same as or different from condition_MR, and the detailed conditions of condition_type 2 can be sent using the existing LTE A1 to A6 types.

[0403] If condition_type 2 is met, the terminal may send a measurement report (RRC / MAC / PHY message) for RS type 1, or may send a configuration request message (RRC / MAC / PHY message) for RS type 2. If possible, the serving base station that has received the report or request message from the terminal may configure RS type 2 to the corresponding terminal so that the terminal may perform measurement or reporting with respect to the corresponding RS.

[0404] In addition, in an embodiment of the present disclosure, if Condition_Type 2 does not exist and measurement configuration of RS Type 2 (i.e., CSI-RS) has not been performed, then in a certain case where performance gain is expected, if a certain condition (Condition_Type 2) is met based on the terminal's own conditions, the terminal can request configuration of RS Type 2.

[0405] RS Type 2 may include neighbor cell information or only serving cell information.

[0406] The terminal attempts measurement of different RSs as configured in operation S1406 , observes the condition for sending a measurement report as configured based on the measurement result in operation S1407 , and reports the measurement result if the condition is satisfied in operation S1408 .

[0407] Fig.15 2 is a flowchart illustrating an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure.

[0408] refer to Fig.15 In operation S1501, the serving base station configures the terminal with information about RS type 1. In operation S1502, the terminal having configured the information about RS type 1 basically continuously performs measurement with respect to the serving cell and the neighboring cell for the corresponding RS (RS type 1, i.e., synchronization signal), and if a certain condition (condition_type 2) is satisfied in operation S1503, then in operation S1504, the terminal directly performs uplink transmission including RS type 1 measurement result report or RS type 2 configuration request.

[0409] from Fig.15 It can be seen that the serving base station can configure a certain condition (condition_type 2) to the terminal with respect to the measurement result of a specific RS (type 1, i.e., synchronization signal) for the purpose of configuring a certain RS (type 2, i.e., CSI-RS) to the corresponding terminal. In addition, the condition for sending a measurement report (hereinafter referred to as MR) can also be configured. Condition_type 2 can be the same as or different from condition_MR, and the detailed conditions of condition_type 2 can be sent using the existing LTE A1 to A6 types.

[0410] If condition_type 2 is met, the terminal may send a measurement report (RRC / MAC / PHY message) for RS type 1, or may send a configuration request message (RRC / MAC / PHY message) for RS type 2.

[0411] The measurement report or RS type 2 configuration request message may include the measurement result of the configured RS, and the corresponding measurement result is managed by the measurement object ID, and both the base station and the terminal can identify for which RS the measurement result is through the corresponding ID.

[0412] If there are one or more other RSs (e.g., CSI-RS) related to the corresponding RS (e.g., NR-SS) QCL, the base station can configure the corresponding RS as RS type 2 to the terminal and can request measurement.

[0413] If possible, the serving base station that has received the report or request message from the terminal may configure RS type 2 to the corresponding terminal so that the terminal can perform measurement or reporting with respect to the corresponding RS.

[0414] In addition, in an embodiment of the present disclosure, if Condition_Type 2 does not exist and measurement configuration of RS Type 2 (i.e., CSI-RS) has not been performed, then in a certain case where performance gain is expected, if a certain condition (Condition_Type 2) is met based on the terminal's own conditions, the terminal can request configuration of RS Type 2.

[0415] The measurement report or RS type 2 configuration request message may include the measurement result of the configured RS, and the corresponding measurement result is managed by the measurement object ID, and both the base station and the terminal can identify for which RS the measurement result is through the corresponding ID.

[0416] If there are one or more other RSs (e.g., CSI-RS) related to the corresponding RS (e.g., NR-SS) QCL, the base station can configure the corresponding RS as RS type 2 to the terminal and can request measurement.

[0417] If it is also necessary to configure the RS type 2 of the adjacent specific base station (or multiple base stations) to the corresponding terminal, then in operation S1505, as a result of the configured condition (condition_type 2), the service base station that has received the uplink signal transmission from the terminal can request the adjacent base station to directly configure the RS type 2 to the corresponding terminal (through X2 interference, the Internet or a wired backhaul link). The RS type 2 configuration request signal sent from the service base station to the adjacent base station may include resource information (frequency, time, antenna, beam information and offset) that can configure the corresponding RS type 2, terminal information (terminal ID, terminal use frequency, time, antenna, beam information and offset) and service cell information (service cell ID, use frequency, time, antenna, beam information and offset).

[0418] In operation S1505, if possible, the neighboring target base station that requests configuration of the corresponding RS type 2 from the serving base station may configure the corresponding RS to the corresponding terminal, and may transmit the corresponding configuration information to the serving base station in operation S1506. The configuration information may include resource information (frequency, time, antenna, beam information, and offset) capable of configuring the corresponding RS type 2, terminal information (terminal ID, terminal use frequency, time, antenna, beam information, and offset), and configuration target cell information (cell ID, use frequency, time, antenna, beam information, and offset).

[0419] In operation S1507, the serving base station, which has received the corresponding RS type 2 configuration information from the target base station, may configure the RS type 2 of the serving base station and the target base station to the terminal.

[0420] As configured, the terminal attempts measurement of different RSs of different cells in operation S1508, observes the conditions for sending a measurement report as configured based on the measurement result in operation S1509, and reports the measurement result in operation S1510 if the condition is met.

[0421] Fig.16 2 is a flowchart illustrating an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure.

[0422] refer to Fig.16 , in operation S1601, the serving base station configures the terminal with information about RS type 1. In operation S1602, the terminal having configured the information about RS type 1 basically continuously performs measurement with respect to the serving cell and the neighboring cell for the corresponding RS (RS type 1, i.e., synchronization signal), and if a certain condition (condition_type 2) is satisfied in operation S1603, then in operation S1604, the terminal performs uplink transmission including an RS type 2 configuration request with respect to the serving cell and the target base station.

[0423] from Fig.16 It can be seen that in operation S1605, the serving base station can configure a condition (condition_type 2) to the terminal with respect to the measurement result of a specific RS (type 1, i.e., synchronization signal) for the purpose of configuring a certain RS (type 2, i.e., CSI-RS) to the corresponding terminal. In addition, in operation 1606, a condition for sending a measurement report (hereinafter referred to as MR) can also be configured. Condition_type 2 can be the same as or different from condition_MR, and the detailed conditions of condition_type 2 can be sent using the existing LTE A1 to A6 types.

[0424] If condition_type 2 is met, the terminal may send a measurement report (RRC / MAC / PHY message) for RS type 1, or may send a configuration request message (RRC / MAC / PHY message) for RS type 2. If possible, the serving base station that has received the report or request message from the terminal may configure RS type 2 to the corresponding terminal so that the terminal may perform measurement or reporting with respect to the corresponding RS.

[0425] In addition, in an embodiment of the present disclosure, if Condition_Type 2 does not exist and measurement configuration of RS Type 2 (i.e., CSI-RS) has not been performed, then in a certain case where performance gain is expected, if a certain condition (Condition_Type 2) is met based on the terminal's own conditions, the terminal can request configuration of RS Type 2.

[0426] If it is also necessary to configure the RS type 2 of the adjacent specific base station (or multiple base stations) to the corresponding terminal, then as a result of the configured condition (condition_type 2), the service base station that has received the uplink signal transmission from the terminal can request the adjacent base station to directly configure the RS type 2 to the corresponding terminal (through X2 interference, the Internet or a wired backhaul link). The RS type 2 configuration request signal sent from the service base station to the adjacent base station may include resource information (frequency, time, antenna, beam information and offset) that can configure the corresponding RS type 2, terminal information (terminal ID, terminal usage frequency, time, antenna, beam information and offset) and service cell information (service cell ID, usage frequency, time, antenna, beam information and offset).

[0427] In addition, if it is also necessary to configure the RS type 2 of an adjacent specific base station (or multiple base stations) to the corresponding terminal, then in operation S1607, as a result of the configured condition (Condition_Type 2), the adjacent base station that has received an uplink signal transmission from the terminal may transmit the corresponding configuration information via a downlink transmission (Msg2 or Msg4), and the configuration information may include resource information (frequency, time, antenna, beam information and offset) capable of configuring the corresponding RS type 2, terminal information (terminal ID, terminal usage frequency, time, antenna, beam information and offset), and service cell information (service cell ID, usage frequency, time, antenna, beam information and offset), wherein the corresponding base station may send the downlink transmission (Msg2 or Msg4) during the process of sending the RACH sent by the corresponding terminal or using other downlink resources that can be sent to the corresponding terminal.

[0428] The serving base station, which has received the corresponding RS type 2 configuration information from the target base station, can configure the RS type 2 of the serving base station and the target base station to the terminal.

[0429] As configured, the terminal attempts measurement of different RSs of different cells in operation S1608, observes the condition for sending a measurement report as configured according to the measurement result in operation S1609, and reports the measurement result in operation S1610 if the condition is met.

[0430] Fig.17 2 is a flowchart illustrating an embodiment related to a case where a serving base station configures information about RS type 1 to a terminal according to an embodiment of the present disclosure.

[0431] refer to Fig.17 , in operation S1701, the serving base station configures the terminal with information about RS type 1. In operation S1702, the terminal having configured the information about RS type 1 basically continuously performs measurement with respect to the serving cell and the neighboring cell for the corresponding RS (RS type 1, i.e., synchronization signal), and if a certain condition (condition_type 2) is satisfied in operation S1703, then in operation S1704, the terminal performs uplink transmission including an RS type 2 configuration request with respect to the serving cell and the target base station.

[0432] from Fig.17 It can be seen that in operation S1705, the serving base station can configure a condition (condition_type 2) to the terminal with respect to the measurement result of a specific RS (type 1, i.e., synchronization signal) for the purpose of configuring a certain RS (type 2, i.e., CSI-RS) to the corresponding terminal. In addition, a condition for sending a measurement report (hereinafter referred to as MR) can also be configured. Condition_type 2 can be the same as or different from condition_MR, and the detailed conditions of condition_type 2 can be sent using the existing LTE A1 to A6 types.

[0433] If condition _type 2 is met, the terminal may send a measurement report (RRC / MAC / PHY message) for RS type 1, or may send a configuration request message (RRC / MAC / PHY message) for RS type 2. If possible, the serving base station or a neighboring base station that has received the report or request message from the terminal may configure RS type 2 to the corresponding terminal so that the terminal can perform measurement or reporting with respect to the corresponding RS.

[0434] Here, the terminal may send a measurement report (RRC / MAC / PHY message) for RS type 1, or may send a configuration request message (RRC / MAC / PHY message) for RS type 2. In addition, the terminal may send an RS type 2 configuration request message including pre-configured RS measurement information received and measured from a neighboring base station, for example, SS beam / block / burst / burst set ID. The RS type 2 request information sent from the terminal to the neighboring base station in operation S1706 may be sent using a random access procedure, and if a certain uplink channel that can be sent by a terminal of a certain neighboring network is defined, the RS type 2 request information may be sent using the defined uplink channel.

[0435] In addition, in an embodiment of the present disclosure, if Condition_Type 2 does not exist and measurement configuration of RS Type 2 (i.e., CSI-RS) has not been performed, then in a certain case where performance gain is expected, if a certain condition (Condition_Type 2) is met based on the terminal's own conditions, the terminal can send a measurement report or an RS Type 2 configuration request to the serving base station or the neighboring base station.

[0436] If it is also necessary to configure the RS type 2 of the adjacent specific base station (or multiple base stations) to the corresponding terminal, then as a result of the configured condition (condition_type 2), the service base station that has received the uplink signal transmission from the terminal can request the adjacent base station to directly configure the RS type 2 to the corresponding terminal (through X2 interference, the Internet or a wired backhaul link). The RS type 2 configuration request signal sent from the service base station to the adjacent base station may include resource information (frequency, time, antenna, beam information and offset) that can configure the corresponding RS type 2, terminal information (terminal ID, terminal usage frequency, time, antenna, beam information and offset) and service cell information (service cell ID, usage frequency, time, antenna, beam information and offset).

[0437] In addition, if it is also necessary to configure the RS type 2 of a neighboring specific base station (or multiple base stations) to the corresponding terminal, then as a result of the configured condition (condition_type 2), the neighboring base station that has received the uplink signal transmission from the terminal can provide the RS type 2 configuration to the service base station to which the corresponding terminal directly belongs (via the X2 interface, the Internet, or a wired backhaul link). The RS type 2 configuration request signal sent from the service base station to the neighboring base station may include resource information (frequency, time, antenna, beam information, and offset) that can configure the corresponding RS type 2, terminal information (terminal ID, terminal usage frequency, time, antenna, beam information, and offset), and service cell information (service cell ID, usage frequency, time, antenna, beam information, and offset).

[0438] In addition, if it is also necessary to configure the RS type 2 of a neighboring specific base station (or multiple base stations) to the corresponding terminal, then as a result of the configured condition (condition_type 2), the neighboring base station that has received the uplink signal transmission from the terminal can provide the RS type 2 configuration to the service base station to which the corresponding terminal directly belongs (via the X2 interface, the Internet, or a wired backhaul link). The RS type 2 configuration request signal sent from the neighboring base station to the service base station may include resource information (frequency, time, antenna, beam information, and offset) that can configure the corresponding RS type 2, terminal information (terminal ID, terminal usage frequency, time, antenna, beam information, and offset), and service cell information (service cell ID, usage frequency, time, antenna, beam information, and offset).

[0439] If possible, in operation S1707, the neighboring target base station to which the serving base station has requested the corresponding RS type 2 configuration may configure the corresponding RS to the corresponding terminal, and may transmit the corresponding configuration information to the serving base station. The configuration information to be sent may include resource information (frequency, time, antenna, beam information, and offset) capable of configuring the corresponding RS type 2, terminal information (terminal ID, terminal use frequency, time, antenna, beam information, and offset), and configured target cell information (serving cell ID, use frequency, time, antenna, beam information, and offset).

[0440] In operation S1708, the serving base station, which has received the corresponding RS type 2 configuration information from the target base station, may configure the RS type 2 of the serving base station and the target base station to the terminal.

[0441] As configured, the terminal attempts measurement of different RSs of different cells in operation S1709 , observes a condition for sending a measurement report as configured based on the measurement result in operation S1710 , and reports the measurement result in operation S1711 if the condition is met.

[0442] Different CSI-RS with the same or different characteristics, resources, beams, and purposes may be configured to a user.

[0443] Measurement reports using measurement values ​​from different RSs to trigger events

[0444] Event-NR1

[0445]

[0446]

[0447] Event-NR2

[0448]

[0449]

[0450] The following table is for explaining the description based on event (NR3), and it is preferable to understand that the contents of the following table are interconnected.

[0451] Event NR3

[0452]

[0453]

[0454]

[0455] The following table is for explaining the description based on event (NR4), and it is preferable to understand that the contents of the following table are interconnected.

[0456] Event NR4

[0457]

[0458]

[0459] The following table is for explaining the description based on event (NR5), and it is preferable to understand that the contents of the following table are interconnected.

[0460] Event NR5

[0461]

[0462]

[0463]

[0464] The following table is for explaining the description based on event (NR6), and it is preferable to understand that the contents of the following table are interconnected.

[0465] Event NR6

[0466]

[0467]

[0468] The following table is for explaining the description based on event (NR7), and it is preferable to understand that the contents of the following table are interconnected.

[0469] Event NR7

[0470]

[0471]

[0472]

[0473] <Example a-Beam Failure Detection via L1 / L2 / L3>

[0474] The terminal can measure the performance degradation of the beam being used, and using this, can trigger a beam change process for changing the beam to another beam. In this case, the process of determining the performance degradation of the beam being used is called a beam failure detection process, and the process can be performed as follows.

[0475] Here, the beam may be a certain beam being used by the terminal and the base station (a base station beam, a terminal beam, or a pair of base station beams and a terminal beam). In addition, the beam may be a certain group of beams specifically (or by default) used by the terminal and the base station.

[0476] Here, the beam may correspond to a physical antenna configuration, or may be a measurement unit of a certain terminal (eg, SS block, SS burst, SS burst set, CSI-RS block, CSI-RS burst, or CSI-RS burst set).

[0477] 1. L1 detection

[0478] -If the (multiple) beams measured by the physical layer meet condition 1, the beam is determined to have failed.

[0479] -The physical layer sends corresponding instructions to the upper layer for subsequent operations.

[0480] - The upper layer starts the beam recovery process after receiving the indication.

[0481] 2. L2 detection using L1 indication

[0482] - If the beam(s) measured by the physical layer satisfies condition 1, a corresponding indication is sent to the upper layer.

[0483] - The L2 layer receives one or more indications from the physical layer, and determines beam failure and / or beam recovery triggering if the reception of the corresponding indication satisfies condition 2.

[0484] - The L2 layer starts the beam recovery process.

[0485] 3. L3 detection using L1 indication

[0486] - If the beam(s) measured by the physical layer satisfies condition 1, a corresponding indication is sent to the upper layer.

[0487] - The L3 layer receives one or more indications from the physical layer, and determines beam failure and / or beam recovery triggering if the reception of the corresponding indication satisfies condition 2.

[0488] - The L3 layer starts the beam recovery process.

[0489] Condition 1 can be as follows.

[0490] -(Multiple) beam measurement values < Threshold1

[0491] - Estimated DL signal reception error probability > N1%

[0492] -(Multiple) beam measurement values < Threshold1 (and) a certain beam measurement value > Threshold2

[0493] - Measurement value of a certain beam group 1 (set1) pre - associated with (or configured from) the base station < Threshold1

[0494] Condition 2 can be as follows.

[0495] - Consecutive indication received N2 times

[0496] - Indication received not less than N3 times within a predetermined time (timer 2)

[0497] - A certain beam measurement value > Threshold2

[0498] - Measurement value of a certain beam in a certain beam group 2 (set2) pre - associated with (or configured from) the base station > Threshold2

[0499] - The case where a certain timer 1 expires which is triggered exactly after Condition 1 is satisfied

[0500] : Timer 1 can be a configured value implemented by the terminal

[0501] : Timer 1 can be a value configured by the base station

[0502] : If a certain indication (i.e., synchronization indication) is received from the lower layer, then timer 1 can be cancelled.

[0503] : If a certain indication (i.e., RLF trigger indication or RLF declaration indication) is received from the upper layer, then timer 1 can be cancelled.

[0504] Embodiment b1 - Hierarchical cells and sets

[0505] The following embodiment is another embodiment, where the CSI - RS resource sets in the cell have the same sub - carrier spacing, CSI - RS transmission period, CSI - RS transmission BW, and CSI - RS reception BW.

[0506] The following Table 1 is according to this embodiment of the present disclosure, and Table 1aa and Table 1ab are added to explain each field included in Table 1. It is preferably understood that the contents of Table 1aa and Table 1ab are interconnected.

[0507] In this case, the CSI-RS is configured by a CSI-RS resource set, and each CSI-RS resource set has the same CSI-RS configuration offset, CSI-RS scrambling ID, sequence generation configuration, repetition and density. The antenna port, resource element mapping pattern, QCL information and bandwidth part information of the CSI-RS resource in each CSI-RS resource set can be provided to the terminal in the form of a bitmap with the same value or different values ​​in the CSI-RS resource set.

[0508] Table 1

[0509]

[0510] Table 1aa

[0511]

[0512] Table 1ab

[0513]

[0514] For example, for RRM and handover of many unspecified terminals, the cell configures the terminals to send CSI-RS resource sets with the same periodicity.

[0515] In addition, the CSI-RS transmission period can be configured by the CSI-RS resource set instead of by the cell in the CSI-ResourceSet-RRM. In this case, different CSI-RS resource sets sent in the corresponding cell can be sent at different periods, and therefore, the terminal can receive different CSI-RS resource sets at different periods.

[0516] In the same CSI-RS resource set, the cell can send CSI-RS with the same transmission slot offset (slotConfigOffset), and different CSI-RS resource sets in the cell can provide different transmission slot offset values. Using this, as an example, a CSI-RS resource set with different CSI-RS transmission slot offsets and the same period can be sent by a bunch of transmit / receive antennas present in different physical locations, such as by a transmit / receive point (TRP or TRxP), and the terminal can receive the CSI-RS resource set by applying a reception period equal to different receive slot offsets.

[0517] In addition, if the CSI-RS resource sets have different frequency characteristics, such as center frequency, frequency bandwidth, and carrier frequency, the cell can send CSI-RS resources with different transmission time slot offsets and the same period between CSI-RS resource sets, and enable the terminal to receive the sent CSI-RS resources.

[0518] In addition, the transmission slot offset can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. This means that all CSI-RS resources and CSI-RS resource sets configured and sent in the corresponding cell have the same transmission slot offset, and the terminal can receive the CSI-RS with the same transmission slot offset sent by the corresponding cell.

[0519] If the repetition indicator is in the on state, the network can configure the CSI-RS resources into the corresponding set to send signals using the same antenna pattern and the same beam, and the terminal can measure the received signal strength of the corresponding CSI-RS beam for different receive beams, and can measure the channel quality while changing the receive beam of the terminal in the CSI-RS resource set. If the terminal feeds back the measurement information to the base station, the corresponding indicator can be used as an indicator by default, where the indicator indicates that feedback on the CSI-RS resource set ID (CSI-RS-ResourceSetId-RRM) is performed.

[0520] If the repetition indicator is in the off state, the network can configure the CSI-RS resource into the corresponding CSI-RS resource set to send signals using different antenna patterns and different beams, and the terminal can fix and receive the receiving beam of the terminal in the CSI-RS resource set, can measure the received signal strength of the corresponding CSI-RS beam in different transmitting beams of the base station for the corresponding receiving beam, and can measure the channel quality. If the terminal feeds back the measurement information to the base station, the corresponding indicator can be used by default as an indicator to indicate not only the execution of feedback on the CSI-RS resource set ID (CSI-RS-ResourceSetId-RRM), but also the execution of the feedback indicator on the resource ID (for example, the bitmap order of the RE mapping pattern to which the feedback resource has been configured, and the bitmap order of the antenna port).

[0521] In addition, the repetition indicator may be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. This means that all CSI-RS resources and CSI-RS resource sets configured and transmitted in the corresponding cell are transmitted according to the same repetition indicator.

[0522] If repetition is turned on and several CSI-RS resource sets are provided, it can be configured to use the same antenna pattern and the same beam in each CSI-RS resource set to send signals, and it can be configured by default to use different antenna patterns and different beams between CSI-RS resource sets to send signals. In this case, the terminal can receive the CSI-RS transmitted by the corresponding cell while changing the receiving beam through different CSI-RS resources in one CSI-RS resource set.

[0523] In addition, if repetition is turned on and several CSI-RS resource sets are configured, the repetition indicator can be an indicator to configure all CSI-RS resource sets and CSI-RS resources in the set to send signals using the same antenna pattern and the same simulated beam. In this case, the terminal can receive the CSI-RS transmitted by the corresponding cell while changing the receiving beam through different CSI-RS resources in one CSI-RS resource set.

[0524] nrofRepeateadCSI-RS-Resources indicates the number of repeated CSI-RS resources, where the number of repeated CSI-RS resources informs whether how many CSI-RS resources are sent using the same antenna configuration and the same beam in the corresponding CSI-RS resource set. The corresponding parameters can be configured and sent only when repetition is turned on.

[0525] In addition, nrofRepeateadCSI-RS-Resources can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. In this case, nrofRepeateadCSI-RS-Resources can configure how many CSI-RS resources in the CSI-RS resource set configured and transmitted in the corresponding cell are bundled and transmitted using the same antenna configuration and the same beam.

[0526] nrofAntennaPortsBitmap is the number of antenna ports used by the CSI-RS resources or configuration information sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same antenna port, it can be configured as one piece of information and sent as one piece of information, while if the resources in the set use different antenna ports, they can be sent in the form of a bitmap of different pieces of information.

[0527] In addition, nrofAntennaPortsBitmap can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resource sets. In this case, nrofAntennaPortsBitmap is the number of antenna ports used by the CSI-RS resource sets configured and transmitted in the corresponding cell or the CSI-RS resources or configuration information existing in each CSI-RS resource set. If all resources in the cell use the same antenna port, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources in the CSI-RS resource set use the same antenna port, but different antenna ports are used between the CSI-RS resource sets, an indicator indicating such configuration can be included, or different pieces of information can be sent in the form of a bitmap relative to the antenna ports configured by the set without an indicator. If the CSI-RS resources in the CSI-RS resource set use different antenna ports, different antenna port information can be sent in the form of a bitmap.

[0528] resourceElementMapPingpatternBitmap is the configuration information of the resource elements used by the CSI-RS resources sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same resource element mapping pattern, it can be configured as one piece of information and sent as one piece of information, and if the resources in the CSI-RS resource set use different resource element mapping patterns, it can be sent in the form of a bitmap of different pieces of information.

[0529] In addition, resourceElementMappingPatternBitmap can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resource sets. In this case, resourceElementMapPingpatternBitMap is resource element mapping pattern information or configuration information used by the CSI-RS resource set configured and sent in the corresponding cell or the CSI-RS resources present in each CSI-RS resource set. If all resources in the cell use the same resource element mapping pattern information, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources in the CSI-RS resource set use the same resource element mapping pattern information, but different resource element mapping patterns are used between CSI-RS resource sets, an indicator indicating such configuration may be included, or different pieces of information may be sent in the form of a bitmap relative to the resource element mapping pattern configured by the set without an indicator. If the CSI-RS resources in the CSI-RS resource set use different resource element mapping patterns, different RE mapping pattern information may be sent in the form of a bitmap.

[0530] qcl_SSB_info_Bitmap is information for notifying the QCL correlation with the synchronization signal block, where the synchronization signal block has a QCL relationship with the CSI-RS resources transmitted in the corresponding CSI-RS resource set in time, frequency, and space, and the id, QCL ID, or transmission config.ID of the corresponding SS block may be used. If all resources in the CSI-RS resource set have a QCL relationship with the same SS block, qcl_SSB_info_Bitmap may be configured as one piece of information and sent as one piece of information, and if the resources in the CSI-RS resource set have a QCL relationship with different SS blocks, it may be sent in the form of a bitmap of different pieces of information.

[0531] In addition, qcl_SSB_info_Bitmap can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resource sets. In this case, qcl_SSB_info_Bitmap is information about a synchronization signal, wherein the synchronization signal has a QCL relationship with a CSI-RS resource set configured and transmitted in the corresponding cell or a CSI-RS resource present in each CSI-RS resource set. If all resources in the cell have a QCL relationship with the same SS block, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources in the CSI-RS resource set have a QCL relationship with the same SS block, but the CSI-RS resource set has a QCL relationship with different SSs, an indicator indicating such configuration may be included, or different pieces of information may be sent in the form of a bitmap relative to the SS blocks having a QCL relationship with the set. If the CSI-RS resources in the CSI-RS resource set have a QCL relationship with different SS blocks, different SS block information may be sent in the form of a bitmap.

[0532] densityBitmap is the density of RE / port / PRB in the CSI-RS resource sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same antenna port, it can be configured as one piece of information and sent as one piece of information, and if the resources in the CSI-RS resource set use different densities, it can be sent in the form of a bitmap of different pieces of information.

[0533] In addition, densityBitmap can be configured in CSI-configCell in units of cells rather than in units of CSI-RS resource sets. In this case, densityBitmap is the density information used by the CSI-RS resource sets configured and sent in the corresponding cell or the CSI-RS resources present in each CSI-RS resource set. If all resources in the cell use the same density information, it can be configured as one piece of information and sent as one piece of information, and the CSI-RS resources in the CSI-RS resource set use the density, and if different densities are used between CSI-RS resource sets, an indicator indicating such configuration can be included, or different pieces of information can be sent in the form of a bitmap relative to the density configured by the set without an indicator. If the CSI-RS resources in the CSI-RS resource set use different densities, different density information can be sent in the form of a bitmap.

[0534] bandwidthpartsBitmap is a parameter including information of CSI-RS resources transmitted in the corresponding CSI-RS resource set, such as bandwidth part id, bandwidth, and frequency. If all resources in the CSI-RS resource set use the same bandwidth part, it can be configured as one piece of information and transmitted as one piece of information, and if the resources in the CSI-RS resource set use different bandwidth parts, it can be transmitted in the form of a bitmap of different pieces of information.

[0535] In addition, bandwidthpartsBitmap can be configured in CSI-configCell in units of cells rather than CSI-RS resource sets. In this case, bandwidthpartsBitmap is the bandwidth part (bandwidthparts) information used by the CSI-RS resource set configured and sent in the corresponding cell or the CSI-RS resources present in each CSI-RS resource set. If all resources in the cell use the same bandwidth part, it can be configured as one piece of information and sent as one piece of information, and the CSI-RS resources in the CSI-RS resource set use the bandwidth part, and if different bandwidth parts are used between CSI-RS resource sets, an indicator indicating such configuration can be included, or different pieces of information can be sent in the form of a bitmap relative to the bandwidth part configured by the set without an indicator. If the CSI-RS resources in the CSI-RS resource set use different bandwidth parts, different bandwidth part information can be sent in the form of a bitmap.

[0536] csi-rs-TransmissionBW is the value of the bandwidth, which is used to inform the terminal cell how wide the different CSI-RS are sent in the frequency band. It can be a reference point in the notification band (lowest or highest frequency) and the absolute value of the bandwidth, a center point in the notification band (ARFCN or center frequency or carrier number or carrier ID) and the absolute value of the bandwidth, or simply a value of the frequency bandwidth.

[0537] In addition, csi-rs-TransmissionBW can be configured in CSI-ResourceSet-RRM by CSI-RS resource set rather than by cell. In this case, csi-rs-TransmissionBW means that different CSI-RS resource sets transmitted in the corresponding cell can be transmitted with different transmission frequency bandwidths.

[0538] csi-rs-MeasurementBW is a value used to inform the terminal through what frequency bandwidth size the terminal can receive the CSI-RS sent by the cell. It can be a reference point (lowest or highest frequency) in the notification band and the absolute value of the bandwidth, a center point (ARFCN or center frequency or carrier number or carrier ID) in the notification band and the absolute value of the bandwidth, or simply a value of the frequency bandwidth.

[0539] In addition, if csi-rs-MeasurementBW is a value that simply notifies a certain terminal of a frequency bandwidth for measuring the corresponding CSI-RS, the corresponding value may be the maximum measurable frequency bandwidth that the terminal can receive and received according to the terminal capability information.

[0540] In addition, if csi-rs-MeasurementBW is a numerical value that simply notifies the frequency bandwidth used by the terminal to measure the corresponding CSI-RS, and has a value less than csi-rs-TransmissionBW, the network can instruct the terminal by default to use the frequency band within the csi-rs-MeasurementBW size range in the csi-rs-TransmissionBW sent by the cell to measure the corresponding cell. In this case, if the working bandwidth of the terminal belongs to the csi-rs-TransmissionBW, the terminal can derive the cell measurement value by measuring the CSI-RS of the target cell within the csi-rs-MeasurementBW size range in the terminal's own working bandwidth. In addition, the terminal can select a frequency band with a csi-rs-MeasurementBW size and with the best performance relative to the entire frequency band of the target cell that can be measured using the gap, and can measure the CSI-RS of the target cell in the corresponding csi-rs-MeasurementBW to derive the cell measurement value. In addition, if the bandwidth part information of the target cell can be known through bandwidthpartsBitmap, the terminal can derive the cell measurement value by selecting a bandwidth part that exists in the same or most similar frequency position as the effective bandwidth part of the service cell to which the terminal itself belongs, and measuring the CSI-RS sent from the corresponding bandwidth part within the range of the corresponding csi-rs-MeasurementBW frequency band.

[0541] In addition, csi-rs-MeasurementBW can be configured in CSI-ResourceSet-RRM by CSI-RS resource set rather than by cell. In this case, the terminal can receive and measure CSI-RS with different frequency bandwidths relative to different CSI-RS resource sets, and can derive cell measurement values.

[0542] Embodiment b2 - Hierarchical cells and resources

[0543] The following embodiment is another embodiment, in which all CSI-RS resources in a cell have the same CSI-RS transmission period, the same CSI-RS configuration offset, subcarrier spacing, CSI-RS transmission bandwidth, and CSI-RS reception bandwidth.

[0544] The following Table 2 is according to this embodiment of the present disclosure, and Table 2aa and Table 2ab are added for explaining the respective fields included in Table 2. It is preferable to understand that the contents of Table 2aa and Table 2ab are connected to each other.

[0545] In this case, the CSI-RS is configured by CSI-RS resources and includes a CSI-RS scrambling ID, sequence generation configuration, repetition, density, antenna port, resource element mapping pattern, QCL information, and bandwidth part information of the corresponding CSI-RS resource.

[0546] Table 2

[0547]

[0548] Table 2aa

[0549]

[0550] Table 2ab

[0551]

[0552] For example, for the purpose of RRM and handover of many unspecified terminals, the cell configures the terminals to send CSI-RS resources with the same periodicity.

[0553] In addition, the CSI-RS resource transmission period can be configured in CSI-Resource-RRM by CSI-RS resource rather than by cell. In this case, different CSI-RS resources sent in the corresponding cell can be sent at different periods, and therefore, the terminal can receive different CSI-RS resources at different periods.

[0554] The cell may transmit CSI-RS resources with different transmission slot offsets (slotConfigOffset) per CSI-RS resource. Therefore, the terminal may receive different CSI-RS resources with different transmission slot offsets.

[0555] In addition, the transmission slot offset can be configured in CSI-configCell in units of cells rather than CSI-RS resources. This means that all CSI-RS resources configured and transmitted in the corresponding cell have the same transmission slot offset, and the terminal can receive the CSI-RS with the same transmission slot offset transmitted by the corresponding cell.

[0556] If the repetition indicator is turned on, the network can configure the CSI-RS resources into the corresponding set to send signals using the same antenna pattern and the same beam, and the terminal can measure the received signal strength of the corresponding CSI-RS beam for different receive beams, and can measure the channel quality while changing the receive beam of the terminal in the cell. The corresponding indicator can be used by default as an indicator indicating that the terminal is not required to feed back measurement information to the base station.

[0557] If the repetition indicator is in the off state, the network can configure the CSI-RS resources in the corresponding cell to send signals using different antenna patterns and different beams, and the terminal can fix and receive the receiving beam of the terminal in the cell, can measure the received signal strength of the corresponding CSI-RS beam in different transmitting beams of the base station for the corresponding receiving beam, and can measure the channel quality. If the terminal feeds back the measurement information to the base station by default, the corresponding indicator can be used as an indicator to indicate direct execution of feedback on the CSI-RS resource ID (CSI-RS-ResourceId-RRM) or execution of feedback on an implicit resource ID, etc., for example, as an indicator to indicate that the CSI-RS resource executes feedback on the configured order, etc.

[0558] In addition, the repetition indicator can be configured in CSI-ConfigCell in units of CSI-RS resources rather than in units of cells. This means that the CSI-RS resource including the corresponding repetition indicator is transmitted using the same antenna configuration and beam as the antenna configuration and beam of the CSI-RS resource just configured previously.

[0559] nrofRepeateadCSI-RS-Resources indicates the number of repeated CSI-RS resources, where the number of repeated CSI-RS resources informs whether how many CSI-RS resources are sent using the same antenna configuration and the same beam in the corresponding cell. The corresponding parameters can be configured and sent only when repetition is turned on.

[0560] nrofAntennaPorts is the number of antenna ports used by CSI-RS resources or configuration information transmitted in the corresponding cell.

[0561] In addition, nrofAntennaPorts can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resources. In this case, nrofAntennaPorts may be the number of antenna ports used by the CSI-RS resources or configuration information configured and transmitted in the corresponding cell. If all resources in the cell use the same antenna port, it may be configured as one piece of information and transmitted as one piece of information, and if the CSI-RS resources use different antenna ports, an indicator indicating such a configuration may be included, or different pieces of information may be transmitted in the form of a bitmap relative to the antenna port configured by the CSI-RS resource without an indicator.

[0562] resourceElementMappingPattern is configuration information of resource elements used by the corresponding CSI-RS resource.

[0563] In addition, resourceElementMappingPattern can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resources. In this case, resourceElementMappingPattern is the configuration information of the resource elements used by the CSI-RS resources sent in the corresponding cell. If all resources in the cell use the same resource element mapping pattern, it can be configured as one piece of information and sent as one piece of information, and if the resources in the cell use different resource element mapping patterns, different pieces of information can be sent in the form of a bitmap.

[0564] qcl_SSB_info is information for notifying the QCL correlation with a synchronization signal block, where the synchronization signal block has a QCL relationship with a corresponding CSI-RS resource in time, frequency, and space, and may use the id, QCL ID, or transmission config.ID of a corresponding SS block.

[0565] In addition, qcl_SSB_info can be configured in CSI-configCell in units of cells rather than CSI-RS resources. In this case, qcl_SSB_info is information about a synchronization signal that has a QCL relationship with each CSI-RS resource configured and transmitted in the corresponding cell. If all resources in a cell have a QCL relationship with the same SS block, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resource has a QCL relationship with the same SS block, different pieces of information can be sent in the form of a bitmap.

[0566] densityBitmap is the density of RE / port / PRB in the corresponding CSI-RS resource.

[0567] In addition, densityBitmap can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resources. In this case, densityBitmap is the density information used by the CSI-RS resources configured and sent in the corresponding cell. If all resources in the cell use the same density information, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources use different densities, such different pieces of density information can be sent in the form of a bitmap.

[0568] bandwidthparts is a parameter including information of CSI-RS resources such as bandwidth part id, bandwidth, and frequency.

[0569] In addition, bandwidthparts can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. In this case, bandwidthparts is bandwidth part information used by CSI-RS resources configured and transmitted in the corresponding cell. If all resources in the cell use the same bandwidth part, it can be configured as one piece of information and transmitted as one piece of information, and if different bandwidth parts are used between CSI-RS resources, such different pieces of bandwidth part information can be transmitted in the form of a bitmap.

[0570] csi-rs-TransmissionBW is the value of the bandwidth, which is used to inform the terminal cell how wide the different CSI-RS are sent in the frequency band. It can be a reference point in the notification band (lowest or highest frequency) and the absolute value of the bandwidth, a center point in the notification band (ARFCN or center frequency or carrier number or carrier ID) and the absolute value of the bandwidth, or simply a value of the frequency bandwidth.

[0571] In addition, csi-rs-TransmissionBW can be configured in CSI-Resource-RRM by CSI-RS resource rather than by cell. In this case, csi-rs-TransmissionBW means that different CSI-RS resources transmitted in the corresponding cell can be transmitted with different transmission frequency bandwidths.

[0572] csi-rs-MeasurementBW is a value used to inform the terminal of the frequency bandwidth size through which the CSI-RS sent by the cell can be received. It can be a reference point in the notification band (lowest or highest frequency) and the absolute value of the bandwidth, a center point in the notification band (ARFCN or center frequency or carrier number or carrier ID) and the absolute value of the bandwidth, or simply a value of the frequency bandwidth.

[0573] In addition, if csi-rs-MeasurementBW is a value that simply notifies a certain terminal of a frequency bandwidth for measuring the corresponding CSI-RS, the corresponding value may be the maximum measurable frequency bandwidth that the terminal can receive and received according to the terminal capability information.

[0574] In addition, if csi-rs-MeasurementBW is a numerical value that simply notifies the frequency bandwidth used by the terminal to measure the corresponding CSI-RS, and has a value less than csi-rs-TransmissionBW, the network can instruct the terminal by default to use the frequency band within the csi-rs-MeasurementBW size range in the csi-rs-TransmissionBW sent by the cell to measure the corresponding cell. In this case, if the working bandwidth of the terminal belongs to the csi-rs-TransmissionBW, the terminal can derive the cell measurement value by measuring the CSI-RS of the target cell within the csi-rs-MeasurementBW size range in the terminal's own working bandwidth. In addition, the terminal can select a frequency band with a csi-rs-MeasurementBW size and with the best performance relative to the entire frequency band of the target cell that can be measured using the gap, and can measure the CSI-RS of the target cell in the corresponding csi-rs-MeasurementBW to derive the cell measurement value. In addition, if the bandwidth part information of the target cell can be known through bandwidthpartsBitmap, the terminal can derive the cell measurement value by selecting a bandwidth part that exists in the same or most similar frequency position as the effective bandwidth part of the service cell to which the terminal itself belongs, and measuring the CSI-RS sent from the corresponding bandwidth part within the range of the corresponding csi-rs-MeasurementBW frequency band.

[0575] In addition, csi-rs-MeasurementBW can be configured in CSI-Resource-RRM by CSI-RS resource rather than by cell. In this case, the terminal can receive and measure CSI-RS with different frequency bandwidths relative to different CSI-RS resources, and can derive cell measurement values.

[0576] <Example b3-hierarchical collection and resources>

[0577] The following embodiment is yet another embodiment, in which all CSI-RS resource sets have the same CSI-RS transmission period, the same CSI-RS configuration offset, subcarrier spacing, CSI-RS transmission bandwidth, and CSI-RS reception bandwidth.

[0578] The following Table 3 is according to this embodiment of the present disclosure, and Table 3aa and Table 3ab are added for explaining the respective fields included in Table 3. It is preferable to understand that the contents of Table 3aa and Table 3ab are connected to each other.

[0579] In this case, the CSI-RS is configured by CSI-RS resources and includes a CSI-RS scrambling ID, sequence generation configuration, repetition, density, antenna port, resource element mapping pattern, QCL information, and bandwidth part information of the corresponding CSI-RS resource.

[0580] Table 3

[0581]

[0582] Table 3aa

[0583]

[0584] Table 3ab

[0585]

[0586] For example, for the purpose of RRM and switching of many unspecified terminals, the CSI-RS resource set configures the terminals to send CSI-RS resources with the same periodicity.

[0587] In addition, the CSI-RS resource transmission period can be configured in the CSI-Resource-RRM by CSI-RS resource rather than by CSI-RS resource set. In this case, different CSI-RS resources sent in the corresponding CSI-RS resource set can be sent with different periods, and therefore, the terminal can receive different CSI-RS resources with different periods.

[0588] The CSI-RS resource set may transmit CSI-RS resources with different transmission slot offsets (slotConfigOffset) per CSI-RS resource. Therefore, the terminal may receive different CSI-RS resources with different transmission slot offsets.

[0589] In addition, the transmission slot offset can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. This means that all CSI-RS resources configured and transmitted in the corresponding CSI-RS resource set have the same transmission slot offset, and the terminal can receive the CSI-RS with the same transmission slot offset transmitted by the corresponding CSI-RS resource set.

[0590] If the repetition indicator is turned on, the network can configure the CSI-RS resources into the corresponding CSI-RS resource set to send signals using the same antenna pattern and the same beam, and the terminal can measure the received signal strength of the corresponding CSI-RS beam for different receive beams, and can measure the channel quality while changing the receive beam of the terminal in the CSI-RS resource set. The corresponding indicator can be used by default as an indicator indicating that the terminal is not required to feed back measurement information to the base station.

[0591] If the repetition indicator is in the off state, the network can configure the CSI-RS resources into the corresponding CSI-RS resource set to send signals using different antenna patterns and different beams, and the terminal can fix and receive the receiving beam of the terminal in the CSI-RS resource set, and can measure the received signal strength of the corresponding CSI-RS beam in different transmitting beams of the base station for the corresponding receiving beam, so that the channel quality can be measured. If the terminal feeds back the measurement information to the base station by default, the corresponding indicator can be used as an indicator to indicate direct execution of feedback on the CSI-RS resource ID (CSI-RS-ResourceId-RRM), or to perform feedback on an implicit resource ID, for example, as an indicator to indicate that the CSI-RS resource performs feedback on the configured order, etc.

[0592] In addition, the repetition indicator can be configured in CSI-ConfigCell in units of CSI-RS resources rather than in units of CSI-RS resource sets. This means that the CSI-RS resource including the corresponding repetition indicator is transmitted using the same antenna configuration and beam as the antenna configuration and beam of the CSI-RS resource just configured previously.

[0593] nrofRepeateadCSI-RS-Resources indicates the number of repeated CSI-RS resources, where the number of repeated CSI-RS resources informs whether how many CSI-RS resources are sent using the same antenna configuration and the same beam in the corresponding CSI-RS resource set. The corresponding parameters can be configured and sent only when repetition is turned on.

[0594] nrofAntennaPorts is the number of antenna ports used by the CSI-RS resources or configuration information sent in the corresponding CSI-RS resource set.

[0595] In addition, nrofAntennaPorts can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. In this case, nrofAntennaPorts can be the number of antenna ports used by the CSI-RS resources or configuration information configured and sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same antenna port, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources use different antenna ports, an indicator indicating such a configuration can be included, or different pieces of information can be sent in the form of a bitmap relative to the antenna port configured by the CSI-RS resource without an indicator.

[0596] resourceElementMappingPattern is configuration information of resource elements used by the corresponding CSI-RS resources.

[0597] In addition, resourceElementMappingPattern can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. In this case, resourceElementMappingPattern is the configuration information of the resource elements used by the CSI-RS resources sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same resource element mapping pattern, it can be configured as one piece of information and sent as one piece of information, and if the resources in the CSI-RS resource set use different resource element mapping patterns, different pieces of information can be sent in the form of a bitmap.

[0598] qcl_SSB_info is information for notifying the QCL correlation with a synchronization signal block, where the synchronization signal block has a QCL relationship with a corresponding CSI-RS resource in time, frequency, and space, and may use the ID of the corresponding SS block, the QCL ID, or the transmission config.ID.

[0599] In addition, qcl_SSB_info can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. In this case, qcl_SSB_info is information about a synchronization signal that has a QCL relationship with each CSI-RS resource configured and transmitted in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set have a QCL relationship with the same SS block, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources have a QCL relationship with the same SS block, different pieces of information can be sent in the form of a bitmap.

[0600] densityBitmap is the density of RE / port / PRB in the corresponding CSI-RS resource.

[0601] In addition, densityBitmap can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. In this case, densityBitmap is the density information used by the CSI-RS resources configured and sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same density information, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources use different densities, these different pieces of density information can be sent in the form of a bitmap.

[0602] bandwidthparts is a parameter including information of CSI-RS resources such as bandwidth part id, bandwidth, and frequency.

[0603] In addition, bandwidthparts can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resource sets. In this case, bandwidthparts is the bandwidth part (bandwidthparts) information used by the CSI-RS resources configured and sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same bandwidth part, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources use different bandwidth parts, these different pieces of bandwidth part information can be sent in the form of a bitmap.

[0604] csi-rs-TransmissionBW is a bandwidth value, which is used to inform the terminal how wide the frequency band range of different CSI-RS sent through the CSI-RS resource set is. It can be a reference point in the notification band (lowest or highest frequency) and an absolute value of the bandwidth, a center point in the notification band (ARFCN or center frequency or carrier number or carrier ID) and an absolute value of the bandwidth, or simply a value of the frequency bandwidth.

[0605] In addition, csi-rs-TransmissionBW can be configured in CSI-Resource-RRM in units of CSI-RS resources rather than in units of CSI-RS resource sets. In this case, csi-rs-TransmissionBW means that different CSI-RS resources sent in the corresponding CSI-RS resource set can be sent with different transmission frequency bandwidths.

[0606] csi-rs-MeasurementBW is a value used to inform the terminal of the frequency bandwidth size through which the terminal can receive the CSI-RS sent by the CSI-RS resource set. It can be a reference point (lowest or highest frequency) in the notification band and an absolute value of the bandwidth, a center point (ARFCN or center frequency or carrier number or carrier ID) in the notification band and an absolute value of the bandwidth, or simply a value of the frequency bandwidth.

[0607] In addition, if csi-rs-MeasurementBW is a value that simply notifies a certain terminal of a frequency bandwidth for measuring the corresponding CSI-RS, the corresponding value may be the maximum measurable frequency bandwidth that the terminal can receive and received according to the terminal capability information.

[0608] In addition, if csi-rs-MeasurementBW is a numerical value that simply notifies the frequency bandwidth used by the terminal to measure the corresponding CSI-RS, and has a value less than csi-rs-TransmissionBW, the network can instruct the terminal by default to use the frequency band within the range of the csi-rs-MeasurementBW size in the csi-rs-TransmissionBW sent by the CSI-RS resource set to measure the corresponding CSI-RS resource set. In this case, if the working bandwidth of the terminal belongs to the csi-rs-TransmissionBW, the terminal can derive the CSI-RS resource set measurement value by measuring the CSI-RS of the target CSI-RS resource set within the range of the csi-rs-MeasurementBW size in the terminal's own working bandwidth. In addition, the terminal can select a frequency band with a csi-rs-MeasurementBW size and with the best performance relative to the entire frequency band of the target CSI-RS resource set that can be measured using the gap, and can measure the CSI-RS of the target CSI-RS resource set in the corresponding csi-rs-MeasurementBW frequency band to derive the CSI-RS resource set measurement value.

[0609] In addition, if it is possible to know the bandwidth part information of the target CSI-RS resource set through bandwidthpartsBitmap, the terminal can derive the CSI-RS resource set measurement value by selecting a bandwidth part that exists in the same or most similar frequency position as the effective bandwidth part of the serving CSI-RS resource set to which the terminal itself belongs, and measuring the CSI-RS sent from the corresponding bandwidth part within the corresponding csi-rs-MeasurementBW frequency band range.

[0610] In addition, csi-rs-MeasurementBW can be configured in CSI-Resource-RRM by CSI-RS resource rather than by CSI-RS resource set. In this case, the terminal can receive and measure CSI-RS with different frequency bandwidths relative to different CSI-RS resources, and can derive CSI-RS resource set measurement values.

[0611] Example c - Tier cells, collections and resources

[0612] The following embodiment is another embodiment, in which all CSI-RS resources in a cell have the same CSI-RS transmission period, subcarrier spacing, CSI-RS transmission bandwidth, and CSI-RS reception bandwidth.

[0613] The following Table 4 is according to this embodiment of the present disclosure, and Table 4aa and Table 4ab are added for explaining the respective fields included in Table 4. It is preferable to understand that the contents of Table 4aa and Table 4ab are connected to each other.

[0614] In a cell, there is a CSI-RS resource set, and the CSI-RS resources in one resource cell can have the same CSI-RS configuration offset, RS scrambling ID, sequence generation configuration, repetition, density and bandwidth part information. In this case, the CSI-RS is configured by the CSI-RS resource and can have CSI-RS antenna ports, resource element mapping patterns and QCL information according to the corresponding CSI-RS resource.

[0615] Table 4

[0616]

[0617] Table 4aa

[0618]

[0619] Table 4ab

[0620]

[0621] For example, for the purpose of RRM and handover of many unspecified terminals, the cell configures the terminals to send CSI-RS resource sets with the same periodicity.

[0622] In addition, the CSI-RS transmission period can be configured in CSI-ResourceSet-RRM by CSI-RS resource set rather than by cell. In this case, different CSI-RS resource sets sent in the corresponding cell can be sent with different periods, and therefore, the terminal can receive different CSI-RS resource sets with different periods.

[0623] In addition, the CSI-RS resource transmission period can be configured in CSI-Resource-RRM by CSI-RS resource rather than by cell. In this case, different CSI-RS resources sent in the corresponding cell can be sent at different periods, and therefore, the terminal can receive different CSI-RS resources at different periods.

[0624] In the same CSI-RS resource set, the cell can send CSI-RS with the same transmission slot offset (slotConfigOffset), and different CSI-RS resource sets in the cell can provide different transmission slot offset values. Using this, CSI-RS resource sets with different CSI-RS transmission slot offsets and the same period can be sent through transmit / receive antenna beams present in different physical locations (for example, through (multiple) transmission / reception points (TRP or TRxP)), and the terminal can receive the CSI-RS resource set by applying the same reception period with different reception slot offsets.

[0625] In addition, if the CSI-RS resource sets have different frequency characteristics, such as center frequency, frequency bandwidth, and carrier frequency, the cell can send CSI-RS resources with different transmission time slot offsets and the same period between CSI-RS resource sets, and enable the terminal to receive the sent CSI-RS resources.

[0626] In addition, the transmission slot offset can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. This means that all CSI-RS resources and CSI-RS resource sets configured and sent in the corresponding cell have the same transmission slot offset, and the terminal can receive the CSI-RS with the same transmission slot offset sent by the corresponding cell.

[0627] In addition, the cell may transmit CSI-RS resources with different transmission slot offsets (slotConfigOffset) per CSI-RS resource. Therefore, the terminal may receive different CSI-RS resources with different transmission slot offsets.

[0628] If the repetition indicator is in the on state, the network can configure the CSI-RS resources into the corresponding set to send signals using the same antenna pattern and the same beam, and the terminal can measure the received signal strength of the corresponding CSI-RS beam for different receive beams, and can measure the channel quality while changing the receive beam of the terminal in the CSI-RS resource set. If the terminal feeds back the measurement information to the base station, the corresponding indicator can be used as an indicator by default, where the indicator indicates that feedback on the CSI-RS resource set ID (CSI-RS-ResourceSetId-RRM) is performed.

[0629] If the repetition indicator is in the off state, the network can configure the CSI-RS resources into the corresponding CSI-RS resource set to send signals using different antenna patterns and different beams, and the terminal can fix and receive the receiving beam of the terminal in the CSI-RS resource set, and can measure the received signal strength of the corresponding CSI-RS beam in different transmitting beams of the base station for the corresponding receiving beam to measure the channel quality. If the terminal feeds back the measurement information to the base station, the corresponding indicator can be used by default as an indicator to indicate that not only feedback of the CSI-RS resource set ID (CSI-RS-ResourceSetId-RRM) but also feedback of the resource ID (for example, the bitmap order of the RE mapping pattern to which the feedback resource has been configured, and the bitmap order of the antenna port) is performed.

[0630] In addition, the repetition indicator can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. This situation means that all CSI-RS resources and CSI-RS resource sets configured and transmitted in the corresponding cell are sent according to the same repetition indicator. If the repetition is turned on and several CSI-RS resource sets are provided, it can be configured to use the same antenna pattern and the same beam in each CSI-RS resource set to send signals, and it can be configured by default to use different antenna patterns and different beams between CSI-RS resource sets to send signals. In this case, the terminal can receive the CSI-RS sent by the corresponding cell while changing the receiving beam through different CSI-RS resources in one CSI-RS resource set. In addition, if the repetition is turned on and several CSI-RS resource sets are configured, the repetition indicator can be an indicator that configures all CSI-RS resource sets and CSI-RS resources in the set to send signals using the same antenna pattern and the same simulated beam. In this case, the terminal can receive the CSI-RS transmitted by the corresponding cell while changing the reception beam through different CSI-RS resources in one CSI-RS resource set.

[0631] In addition, the repetition indicator can be configured in the CSI-Resource-RRM in units of CSI-RS resources rather than in units of cells. This means that the CSI-RS resource including the corresponding repetition indicator is transmitted using the same antenna configuration and beam as the antenna configuration and beam of the CSI-RS resource just configured previously.

[0632] nrofRepeateadCSI-RS-Resources indicates the number of repeated CSI-RS resources, where the number of repeated CSI-RS resources informs whether how many CSI-RS resources are sent using the same antenna configuration and the same beam in the corresponding CSI-RS resource set. The corresponding parameters can be configured and sent only when repetition is turned on.

[0633] In addition, nrofRepeateadCSI-RS-Resources can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. In this case, several CSI-RS resources present in the CSI-RS resource set configured and transmitted in the corresponding cell can be bundled to be transmitted using the same antenna configuration and the same beam.

[0634] nrofAntennaPorts is the number of antenna ports used by CSI-RS resources or configuration information transmitted in the corresponding cell.

[0635] In addition, nrofAntennaPorts can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resources. In this case, nrofAntennaPorts may be the number of antenna ports used by the CSI-RS resources or configuration information configured and transmitted in the corresponding cell. If all resources in the cell use the same antenna port, it may be configured as one piece of information and transmitted as one piece of information, and if the CSI-RS resources use different antenna ports, an indicator indicating such a configuration may be included, or different pieces of information may be transmitted in the form of a bitmap relative to the antenna port configured by the CSI-RS resource without an indicator.

[0636] In addition, nrofAntennaPorts can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. nrofAntennaPorts can be the number of antenna ports used by the CSI-RS resources transmitted in the corresponding CSI-RS resource set. If all resources in a CSI-RS resource set use the same antenna port, it can be configured as one piece of information and sent as one piece of information, while if the CSI-RS resources in the set use different antenna ports, different pieces of information can be sent in the form of a bitmap.

[0637] resourceElementMappingPattern is configuration information of resource elements used by the corresponding CSI-RS resources.

[0638] In addition, resourceElementMappingPattern can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. resourceElementMappingPattern is configuration information of resource elements used by CSI-RS resources sent in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same resource element mapping pattern, it can be configured as one piece of information and sent as one piece of information, and if the resources in the CSI-RS resource set use different resource element mapping patterns, different pieces of information can be sent in the form of a bitmap.

[0639] In addition, resourceElementMappingPattern can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resources. In this case, resourceElementMapPingpattern is resource element mapping pattern information or configuration information used by CSI-RS resources configured and transmitted in the corresponding cell or CSI-RS resources present in each CSI-RS resource set. If all resources in the cell use the same resource element mapping pattern information, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources in the CSI-RS resource set use the same resource element mapping pattern information, but different resource element mapping patterns are used between CSI-RS resource sets, an indicator indicating such configuration may be included, or different pieces of information may be sent in the form of a bitmap relative to the resource element mapping pattern configured by the set without an indicator. If the CSI-RS resources in the CSI-RS resource set use different resource element mapping patterns, different RE mapping pattern information may be sent in the form of a bitmap.

[0640] qcl_SSB_info is information for notifying the QCL correlation with the synchronization signal block (where the synchronization signal block has a QCL relationship with the corresponding CSI-RS resource in time, frequency and space), and the id, QCL ID or transmission config.ID of the corresponding SS block may be used.

[0641] In addition, qcl_SSB_info_Bitmap can be configured in CSI-ResourceSet-RRM in units of CSI-RS resource sets rather than in units of CSI-RS resources. qcl_SSB_info_Bitmap is information for CSI-RS resources sent in the corresponding CSI-RS resource set to notify the QCL relationship with the synchronization signal block (where the synchronization signal block has a QCL relationship with the corresponding CSI-RS resource in time, frequency and space), and the id, QCL ID or transmission config.ID of the corresponding SS block can be used. If all resources in the CSI-RS resource set have a QCL relationship with the same SS block, it can be configured as one piece of information and sent as one piece of information, and if the CSI-RS resources in the CSI-RS resource set have a QCL relationship with different SS blocks, different pieces of information can be sent in the form of a bitmap.

[0642] In addition, qcl_SSB_info can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resources. In this case, qcl_SSB_info is information about a synchronization signal, wherein the synchronization signal has a QCL relationship with the CSI-RS resources configured and transmitted in the corresponding cell or the CSI-RS resources present in each CSI-RS resource set. If all resources in the cell have a QCL relationship with the same SS block, it can be configured as one piece of information and transmitted as one piece of information, and if the CSI-RS resources in the CSI-RS resource set have a QCL relationship with the same SS block, but have a QCL relationship with different SS blocks between the CSI-RS resource sets, an indicator indicating such configuration may be included, or different pieces of information may be sent in the form of a bitmap relative to the SS blocks having a QCL relationship by set without an indicator. If the CSI-RS resources in the CSI-RS resource set have a QCL relationship with different SS blocks, different pieces of SS block information may be sent in the form of a bitmap.

[0643] Density is the density of RE / port / PRB of the CSI-RS resource transmitted in the corresponding CSI-RS resource set. If all resources in the CSI-RS resource set use the same antenna port, it can be configured as one piece of information and sent as one piece of information, and if the resources in the CSI-RS resource set use different densities, it can be sent in the form of a bitmap of different pieces of information.

[0644] In addition, the density can be configured in CSI-ConfigCell in units of cells rather than CSI-RS resource sets. In this case, the density is the density information used by the CSI-RS resource sets configured and sent in the corresponding cell or the CSI-RS resources present in each CSI-RS resource set. If all resources in the cell use the same density information, it can be configured as one piece of information and sent as one piece of information, and the CSI-RS resources in the CSI-RS resource set use the density, and if different densities are used between CSI-RS resource sets, an indicator indicating such configuration can be included, or different pieces of information can be sent in the form of a bitmap relative to the density configured by the set without an indicator. If the CSI-RS resources in the CSI-RS resource set use different densities, different pieces of density information can be sent in the form of a bitmap.

[0645] In addition, the density can be configured in CSI-Resource-RRM in units of CSI-RS resources rather than in units of CSI-RS resource sets.

[0646] Bandwidthparts information is a parameter including information of CSI-RS resources transmitted in the corresponding CSI-RS resource set (such as bandwidth part id, bandwidth, and frequency). If all resources in the CSI-RS resource set use the same bandwidth part, it can be configured as one piece of information and transmitted as one piece of information, and if the resources in the CSI-RS resource set use different bandwidth parts, it can be transmitted in the form of a bitmap of different pieces of information.

[0647] In addition, bandwidthparts can be configured in CSI-ConfigCell in units of cells rather than in units of CSI-RS resource sets. In this case, the bandwidthparts is the bandwidth part information used by the CSI-RS resource sets configured and sent in the corresponding cell or the CSI-RS resources present in each CSI-RS resource set. If all resources in the cell use the same bandwidth part, it can be configured as one piece of information and sent as one piece of information, and the CSI-RS resources in the CSI-RS resource set use the bandwidth part, and if different bandwidth parts are used between CSI-RS resource sets, an indicator indicating such configuration can be included, or different pieces of information can be sent in the form of a bitmap relative to the bandwidth part configured by the set without an indicator. If the CSI-RS resources in the CSI-RS resource set use different bandwidth parts, different bandwidth part information can be sent in the form of a bitmap.

[0648] In addition, the bandwidthparts may be configured in the CSI-Resource-RRM in units of CSI-RS resources rather than in units of CSI-RS resource sets.

[0649] csi-rs-TransmissionBW is the value of the bandwidth, which is used to inform the terminal how wide the frequency band is for different CSI-RS sent by the cell. It can be a reference point (lowest or highest frequency) in the notification band and the absolute value of the bandwidth, a center point (ARFCN or center frequency or carrier number or carrier ID) in the notification band and the absolute value of the bandwidth, or simply a value for the frequency bandwidth.

[0650] In addition, csi-rs-TransmissionBW can be configured in CSI-ResourceSet-RRM by CSI-RS resource set rather than by cell. In this case, csi-rs-TransmissionBW means that different CSI-RS resource sets transmitted in the corresponding cell can be transmitted with different transmission frequency bandwidths.

[0651] csi-rs-MeasurementBW is a value used to inform the terminal through what frequency bandwidth size the terminal can receive the CSI-RS sent by the cell. It can be a reference point (lowest or highest frequency) in the notification band and the absolute value of the bandwidth, a center point (ARFCN or center frequency or carrier number or carrier ID) in the notification band and the absolute value of the bandwidth, or simply a value of the frequency bandwidth.

[0652] In addition, if csi-rs-MeasurementBW is a value that simply notifies a certain terminal of a frequency bandwidth for measuring the corresponding CSI-RS, the corresponding value may be the maximum measurable frequency bandwidth that the terminal can receive and received according to the terminal capability information.

[0653] In addition, if csi-rs-MeasurementBW is a numerical value that simply notifies the frequency bandwidth used by the terminal to measure the corresponding CSI-RS, and has a value less than csi-rs-TransmissionBW, the network can instruct the terminal by default to use the frequency band within the csi-rs-MeasurementBW size range in the csi-rs-TransmissionBW sent by the cell to measure the corresponding cell. In this case, if the working bandwidth of the terminal belongs to the csi-rs-TransmissionBW, the terminal can derive the cell measurement value by measuring the CSI-RS of the target cell within the csi-rs-MeasurementBW size range in the terminal's own working bandwidth. In addition, the terminal can select a frequency band with a csi-rs-MeasurementBW size and with the best performance relative to the entire frequency band of the target cell that can be measured using the gap, and can measure the CSI-RS of the target cell in the corresponding csi-rs-MeasurementBW frequency band to derive the cell measurement value. In addition, if the bandwidth part information of the target cell can be known through bandwidthpartsBitmap, the terminal can derive the cell measurement value by selecting a bandwidth part that exists in the same or most similar frequency position as the effective bandwidth part of the service cell to which the terminal itself belongs, and measuring the CSI-RS sent from the corresponding bandwidth part within the range of the corresponding csi-rs-MeasurementBW frequency band.

[0654] In addition, csi-rs-MeasurementBW can be configured in CSI-ResourceSet-RRM by CSI-RS resource set rather than by cell. In this case, the terminal can receive and measure CSI-RS with different frequency bandwidths relative to different CSI-RS resource sets, and can derive cell measurement values.

[0655] In addition, csi-rs-MeasurementBW can be configured in CSI-Resource-RRM by CSI-RS resource rather than by cell. In this case, the terminal can receive and measure CSI-RS with different frequency bandwidths relative to different CSI-RS resources, and can derive cell measurement values.

[0656] Fig.18A is a diagram illustrating a terminal according to an embodiment of the present disclosure.

[0657] refer to Fig.18A, the terminal 1800 may include a transceiver 1810 configured to send and receive signals and a controller 1830. Through the transceiver 1810, the terminal 1800 may send and / or receive signals, information, and messages. The controller 1830 may control the overall operation of the terminal 1800. The controller 1830 may include at least one processor. The controller 1830 may be configured to transmit and receive signals, information, and messages as described above. Figures 1 to 4 , 5A to 5C, 6 to 10, 11A and 11B, 12 to 17 to control the operation of the terminal.

[0658] In addition, the controller 1830 receives RS configuration information sent by the base station, specifies the resources on which the RS is to be sent according to the configuration information, and measures the RS on the corresponding resources. In addition, if it is determined that the measurement of the RS satisfies a certain condition, the controller may send, for example, a measurement report result to the serving base station, or may request the serving base station or the neighboring base station to configure another RS ​​based on a subsequent operation triggered by the corresponding condition.

[0659] Fig.18B is a diagram illustrating an operation of a terminal according to an embodiment of the present disclosure.

[0660] refer to Fig.18B In operation S1801, the terminal may receive CSI-RS configuration information in the form of SystemInfo or message (PHY / MAC / RLC / RRC) through PBCH, control channel (PDCCH) and data channel (PDSCH). In operation S1802, the terminal having received the corresponding CSI-RS information may identify CSI-RS reception resources using various information (such as offset information, periodicity, measurement gap and window) included in the received information.

[0661] In operation S1803, the terminal that has identified the CSI-RS reception resources can receive and measure CSI-RS information from the corresponding resources, and if the results of the reception and measurement meet the predetermined conditions, in operation S1804, it can use the corresponding configured resources (PUCCH / PUSCH / PRACH) to perform uplink transmission.

[0662] Fig.18C is a diagram illustrating an operation of a terminal according to an embodiment of the present disclosure.

[0663] refer to Fig.18CIn operation S1811, the terminal may receive CSI-RS configuration information in the form of SystemInfo or message (PHY / MAC / RLC / RRC) through PBCH, control channel (PDCCH) and data channel (PDSCH). In operation S1812, the terminal having received the corresponding CSI-RS information may identify CSI-RS reception resources using various information (such as offset information, periodicity, measurement gap and window) included in the received information.

[0664] The terminal that has identified the CSI-RS reception resource can determine to select and receive a portion (one or more CSI-RS) of all CSI-RSs that ensure performance (for example, when the received signal RSRP / RSRQ / CQI / SNR / SINR is equal to or greater than a specific threshold, or the CSI-RS reception performance with the best performance is included in the opposite threshold performance), and can determine the terminal reception beam to be used to receive the corresponding CSI-RS based on the NR-SS measurement in operation S1813 as the beam with the best performance. In this case, the terminal can select the best CSI-RS only for a specific terminal reception beam (for example, a terminal reception beam or the best beam pair with the best performance for all NR-SS measurements), so that the terminal can maintain the same reception beam based on the terminal reception beam during CSI-RS selection.

[0665] CSI-RS information may be received from corresponding resources, and if the reception and measurement results in operation S1814 satisfy predetermined conditions, uplink transmission may be performed using corresponding configured resources PUCCH / PUSCH / PRACH in operation S1815.

[0666] Fig.19 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure.

[0667] refer to Fig.19 , the base station 1900 may include a transceiver 1910 configured to send and receive signals and a controller 1930. Through the transceiver 1910, the base station 1900 may send and / or receive signals, information, and messages. The controller 1930 may control the overall operation of the base station 1900. The controller 1930 may include at least one processor. The controller 1930 may be as described above. Figures 1 to 4 , 5A to 5C, 6 to 10, 11A and 11B, 12 to 17 to control the operation of the terminal.

[0668] In addition, the controller 1930 sends RS configuration information to the terminal and sends RS on the corresponding resource. In addition, if the terminal sends a certain measurement report result or a certain RS configuration request information, the controller that has received the information can configure RS, send corresponding configuration information and corresponding RS to the terminal, or request another neighboring base station to provide RS configuration for the corresponding terminal.

[0669] If certain RS configuration information for a specific terminal (or a number of unspecified terminals) is received from a neighboring base station, such configuration information may be transmitted to the terminal in the network.

[0670] While the present disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: receiving, from a base station, a configuration message including configuration information of at least one reference signal related to radio resource management (RRM); receiving the at least one reference signal from a base station based on the configuration message; performing measurement on the at least one reference signal based on the configuration message; as well as reporting the measurement result to the base station when a predetermined condition is met, wherein the configuration message includes first information about a cell on which the at least one reference signal is transmitted and second information about a resource on which the at least one reference signal is transmitted on the cell, The first information includes information about an identification ID of the cell and frequency information associated with the measurement of the at least one reference signal sent on the cell, and Wherein, when the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

2. The method according to claim 1, wherein: The information on the ID of the cell includes a physical cell ID of the cell.

3. The method according to claim 1, wherein: The second information includes information about an index of the at least one reference signal and information indicating a transmission periodicity of the at least one reference signal.

4. The method according to claim 1, wherein: The at least one reference signal is a channel state information-reference signal CSI-RS.

5. A method performed by a base station in a wireless communication system, the method comprising: determining configuration information about at least one reference signal related to radio resource management, RRM; Sending a configuration message including the determined configuration information to the terminal; as well as sending the at least one reference signal to the terminal according to the configuration information, wherein the configuration message includes first information about a cell on which the at least one reference signal is transmitted and second information about a resource on which the at least one reference signal is transmitted on the cell, The first information includes information about an identification ID of the cell and frequency information associated with measurement of the at least one reference signal sent on the cell, and Wherein, in a case where the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

6. The method according to claim 5, wherein: The information on the ID of the cell includes a physical cell ID of the cell.

7. The method according to claim 5, wherein: The second information includes information about an index of the at least one reference signal and information indicating a transmission periodicity of the at least one reference signal.

8. The method according to claim 5, wherein: The at least one reference signal is a channel state information-reference signal CSI-RS.

9. A terminal in a wireless communication system, the terminal comprising: Transceiver; as well as The controller is configured as: receiving, via the transceiver, from a base station a configuration message including configuration information of at least one reference signal related to radio resource management (RRM); receiving, via the transceiver, the at least one reference signal from a base station based on the configuration message; performing measurement on the at least one reference signal based on the configuration message; as well as reporting the measurement result to the base station when a predetermined condition is met, wherein the configuration message includes first information about a cell on which the at least one reference signal is transmitted and second information about a resource on which the at least one reference signal is transmitted on the cell, The first information includes information about an identification ID of the cell and frequency information associated with the measurement of the at least one reference signal sent on the cell, and Wherein, when the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

10. The terminal according to claim 9, wherein: The information on the ID of the cell includes a physical cell ID of the cell.

11. The terminal according to claim 9, wherein: The second information includes information about an index of the at least one reference signal and information indicating a transmission periodicity of the at least one reference signal.

12. The terminal according to claim 9, wherein: The at least one reference signal is a channel state information-reference signal CSI-RS.

13. A base station in a wireless communication system, the base station comprising: Transceiver; and The controller is configured as: determining configuration information about at least one reference signal related to radio resource management, RRM; sending, via the transceiver, a configuration message including the determined configuration information to the terminal; as well as sending the at least one reference signal to the terminal via the transceiver according to the configuration information, wherein the configuration message includes first information about a cell on which the at least one reference signal is transmitted and second information about a resource on which the at least one reference signal is transmitted on the cell, The first information includes information about an identification ID of the cell and frequency information associated with measurement of the at least one reference signal sent on the cell, and Wherein, in a case where the second information includes information about a synchronization signal block associated with the at least one reference signal, the timing of the at least one reference signal is identified based on the synchronization signal block.

14. The base station according to claim 13, wherein: The information on the ID of the cell includes a physical cell ID of the cell.

15. The base station according to claim 13, wherein: The second information includes information about an index of the at least one reference signal and information indicating a transmission periodicity of the at least one reference signal.

16. The base station according to claim 13, wherein: The at least one reference signal is a channel state information-reference signal CSI-RS.

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