Method and apparatus for measuring and reporting cir in communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present invention proposes a technique for measuring and reporting more diverse information on a channel.

Description

Method and device for measuring and reporting CIR in a communication system

[0001] The present invention relates to operations of a transmitter and a receiver for improving link performance between a terminal and a base station in a wireless communication system and to a device for performing the operations.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in the sub-6GHz frequency band such as 3.5 gigahertz (3.5GHz), but also in the ultra-high frequency band called millimeter wave (mmWave) such as 28GHz and 39GHz ('Above 6GHz'). In addition, for 6G mobile communication technology, which is called the system after 5G communication (Beyond 5G), implementation in the terahertz band (for example, the 3 terahertz (3THz) band at 95GHz) is being considered to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low latency time that is reduced to one-tenth.

[0003] In the early stages of 5G mobile communication technology, the goal is to support services and satisfy performance requirements for enhanced Mobile Broadband (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC). These include beamforming and massive MIMO to mitigate path loss of radio waves in ultra-high frequency bands and increase the transmission distance of radio waves, support for various numerologies (such as operation of multiple subcarrier intervals) and dynamic operation of slot formats for efficient use of ultra-high frequency resources, initial access technology to support multi-beam transmission and wideband, definition and operation of BWP (Bidth Part), new channel coding methods such as LDPC (Low Density Parity Check) codes for large-capacity data transmission and Polar Code for reliable transmission of control information, and L2 pre-processing (L2). Standardization has been made for network slicing, which provides dedicated networks specialized for specific services, and pre-processing.

[0004] Currently, discussions are underway to improve and enhance the initial 5G mobile communication technology in consideration of the services that 5G mobile communication technology was intended to support, and physical layer standardization is in progress for technologies such as V2X (Vehicle-to-Everything) to help autonomous vehicles make driving decisions and increase user convenience based on their own location and status information transmitted by vehicles, NR-U (New Radio Unlicensed) for the purpose of system operation that complies with various regulatory requirements in unlicensed bands, NR terminal low power consumption technology (UE Power Saving), Non-Terrestrial Network (NTN), which is direct terminal-satellite communication to secure coverage in areas where communication with terrestrial networks is impossible, and Positioning.

[0005] In addition, standardization of wireless interface architecture / protocols is in progress for technologies such as intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) that provides nodes for expanding network service areas by integrating wireless backhaul links and access links, Mobility Enhancement technology including Conditional Handover and Dual Active Protocol Stack (DAPS) handover, and 2-step random access (2-step RACH for NR) that simplifies random access procedures. Standardization is also in progress for system architecture / services such as 5G baseline architecture (e.g., Service-based Architecture, Service-based Interface) for grafting Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) that provides services based on the location of the terminal.

[0006] Once these 5G mobile communication systems are commercialized, an explosive increase in connected devices will be connected to the communication network, necessitating enhanced functionality and performance of 5G mobile communication systems and integrated operation of these connected devices. To this end, new research will be conducted on improving 5G performance and reducing complexity, supporting AI services, supporting metaverse services, and drone communications by utilizing eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] In addition, the development of these 5G mobile communication systems includes new waveforms to ensure coverage in the terahertz band of 6G mobile communication technology, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), Array Antenna, and Large Scale Antenna, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), Reconfigurable Intelligent Surface (RIS) technology, as well as full duplex technology to improve the frequency efficiency and system network of 6G mobile communication technology, satellite, AI (Artificial Intelligence) from the design stage and AI-based communication technology that realizes system optimization by internalizing end-to-end AI support functions, and ultra-high-performance communication and computing resources to provide services with complexity that exceeds the limits of terminal computing capabilities. It can serve as a basis for the development of next-generation distributed computing technologies that can be realized by utilizing them.

[0008] The present invention proposes a method for measuring and reporting more diverse information about a wireless channel. In particular, it proposes a method and device for effectively measuring and reporting delay.

[0009] In order to solve the above problems, the present invention provides a method performed by a base station in a communication system, comprising: a step of transmitting reference signal (RS) configuration information and RS measurement report configuration information to a terminal; a step of transmitting an RS related to the RS configuration information to the terminal; and a step of receiving an RS measurement report from the terminal, wherein when the RS is composed of a first signal and a second signal and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report is characterized in that it includes information related to q1 and a combined RSRP (reference signal received power) of the first signal and the second signal.

[0010] In addition, a method performed by a terminal in a communication system, comprising: a step of receiving reference signal (RS) configuration information and RS measurement report configuration information from a base station; a step of receiving an RS related to the RS configuration information with the terminal; a step of confirming an RSRP (reference signal received power) related to the RS based on the RS; and a step of transmitting an RS measurement report to the base station, wherein when the RS is composed of a first signal and a second signal and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report is characterized in that it includes information related to q1 and a combined RSRP of the first signal and the second signal.

[0011] In addition, a method performed by a base station in a communication system, comprising: at least one transceiver; at least one processor communicatively connected to the at least one transceiver; and a memory communicatively connected to the at least one processor and storing instructions that are executable individually or in any combination by the at least one processor, such that the base station transmits reference signal (RS) configuration information and RS measurement report configuration information to a terminal, transmits an RS related to the RS configuration information to the terminal, and receives an RS measurement report from the terminal; wherein the RS is composed of a first signal and a second signal, and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report is characterized in that it includes information related to the q1 and a combined RSRP (reference signal received power) of the first signal and the second signal.

[0012] In addition, a method performed by a terminal in a communication system, comprising: at least one transceiver; at least one processor communicatively connected to the at least one transceiver; and a memory communicatively connected to the at least one processor and storing instructions that are executable individually or in any combination by the at least one processor, such that the terminal receives reference signal (RS) configuration information and RS measurement report configuration information from a base station, receives an RS related to the RS configuration information with the terminal, determines an RSRP (reference signal received power) related to the RS based on the RS, and transmits an RS measurement report to the base station; wherein, when the RS is composed of a first signal and a second signal and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report is characterized in that it includes information related to the q1 and a combined RSRP of the first signal and the second signal.

[0013] According to one embodiment of the present invention, it is possible to measure and report various channel information more easily and accurately.

[0014] Figure 1 is a diagram illustrating an example of the basic structure of a time-frequency domain of a wireless communication system.

[0015] FIG. 2 is a diagram illustrating an example of a frame, subframe, and slot structure in a wireless communication system.

[0016] Figure 3 is a diagram illustrating an example of measuring a reference signal and channel propagation delay for position measurement.

[0017] Figure 4 is a diagram illustrating propagation delay according to the CDL-C channel model.

[0018] FIG. 5 is a diagram illustrating an example of a reference signal structure for estimating CIR information or information corresponding to CIR suggested by the present invention and an example of CIR measurement using the reference signal.

[0019] Fig. 6 is a diagram illustrating an example of an RS structure for increasing the reception reliability of RS.

[0020] Figure 7 is a diagram illustrating another example of an RS structure for increasing the reception reliability of RS.

[0021] FIG. 8 is a diagram illustrating another example of an RS structure for increasing the reception reliability of RS.

[0022] Figure 9 shows multiple frequency domain intervals q from one RS. n This is a diagram showing an example of measuring RSRP corresponding to .

[0023] Figure 10 shows a number of frequency domain intervals q n This is a diagram illustrating an example of increasing measurement reliability by increasing the amount of resources of one RS corresponding to .

[0024] Figure 11 is a diagram illustrating an example of RSs mapped to resources having non-regular intervals in the frequency domain.

[0025] Figure 12 is a diagram illustrating an example of a sub-pattern and sub-pattern index of RS.

[0026] Figure 13 is a diagram illustrating another example of a sub-pattern and sub-pattern index of RS.

[0027] Figure 14 is a diagram illustrating an example of time domain signal processing performed by a receiver.

[0028] FIG. 15 is a diagram illustrating an example of the operation of a transmitter performing at least one embodiment of the present disclosure.

[0029] FIG. 16 is a diagram illustrating an example of the operation of a receiving end performing at least one embodiment of the present disclosure.

[0030] FIG. 17 is a diagram illustrating the structure of a terminal in a wireless communication system according to an example of the present disclosure.

[0031] FIG. 18 is a diagram illustrating the structure of a base station in a wireless communication system according to an example of the present disclosure.

[0032] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings.

[0033] In describing the embodiments, descriptions of technical details that are well known in the technical field to which the present disclosure pertains and are not directly related to the present disclosure will be omitted. This is to avoid obscuring the gist of the present disclosure by omitting unnecessary explanations and to convey the gist more clearly.

[0034] For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically depicted. Furthermore, the dimensions of each component do not entirely reflect its actual size. Identical or corresponding components in each drawing are assigned the same reference numbers.

[0035] The advantages and features of the present disclosure, and the methods for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present disclosure is complete and to fully inform those skilled in the art of the disclosure of the scope of the disclosure, and the present disclosure is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification. In addition, in describing the present disclosure, if a specific description of a related function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description thereof will be omitted. And the following terminology

[0036] These are terms defined in consideration of the functions in the present disclosure, and may vary depending on the intention or custom of the user or operator. Therefore, the definitions should be made based on the contents throughout this specification. In addition, the above-mentioned respective embodiments can be combined and operated as needed. For example, parts of one embodiment of the present disclosure and parts of another embodiment can be combined and operated as a base station and a terminal. For example, parts of the first embodiment and the second embodiment of the present disclosure can be combined and operated as a base station and a terminal.

[0037] Hereinafter, the base station is an entity that performs resource allocation of a terminal, and may be at least one of a gNode B, an eNode B, a Node B, a BS (base station), a wireless access unit, a base station controller, or a node on a network. The terminal may include a UE (user equipment), an MS (mobile station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, downlink (DL) refers to a wireless transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) refers to a wireless transmission path of a signal transmitted from a terminal to a base station. In addition, although an LTE (Long-Term Evolution) or LTE-A (LTE-advanced) system may be described below as an example, embodiments of the present disclosure may also be applied to other communication systems having a similar technical background or channel type. For example, this may include the fifth-generation mobile communication technology (5G, new radio, NR) developed after LTE-A. The term "5G" below may also encompass existing LTE, LTE-A, and other similar services. Furthermore, the present disclosure may be applied to other communication systems with some modifications, as determined by a person with skilled technical knowledge, without significantly departing from the scope of the present disclosure.

[0038] At this time, it will be understood that each block of the processing flowchart drawings and combinations of the flowchart drawings can be performed by computer program instructions. These computer program instructions can be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment create a means for performing the functions described in the flowchart block(s). These computer program instructions can also be stored in a computer-available or computer-readable memory that can direct a computer or other programmable data processing equipment to implement the functions in a specific manner, so that the instructions stored in the computer-available or computer-readable memory can also produce a manufactured item that includes an instruction means for performing the functions described in the flowchart block(s). Since the computer program instructions may be installed on a computer or other programmable data processing device, a series of operational steps may be performed on the computer or other programmable data processing device to create a computer-executable process, and the instructions that cause the computer or other programmable data processing device to perform the steps for performing the functions described in the flowchart block(s) may also provide steps for performing the functions described in the flowchart block(s).

[0039] Additionally, each block may represent a module, segment, or portion of code that contains one or more executable instructions for performing a specific logical function(s). It should also be noted that in some alternative implementation examples, the functions described in the blocks may occur out of order. For example, two blocks depicted in succession may actually be executed substantially concurrently, or the blocks may sometimes be executed in reverse order, depending on their respective functions.

[0040] Here, the term '~ unit' used in this embodiment means software or hardware components such as FPGA (field programmable gate array) or ASIC (application specific integrated circuit), and the '~ unit' performs certain roles. However, the '~ unit' is not limited to software or hardware. The '~ unit' may be configured to be on an addressable storage medium or may be configured to play one or more processors. Accordingly, as an example, the '~ unit' includes components such as software components, object-oriented software components, class components, and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. Additionally, the components and '~parts' may be implemented to play one or more central processing units (CPUs) within the device or secure multimedia card. In addition, in an embodiment, the '~parts' may include one or more processors.

[0041] Wireless communication systems are evolving from providing voice-oriented services in the early days to broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards such as 3GPP's HSPA (High Speed ​​Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2's HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE's 802.16e.

[0042] As a representative example of the above broadband wireless communication system, the LTE system adopts the OFDM (orthogonal frequency division multiplexing) method in the downlink and the SC-FDMA (single carrier frequency division multiple access) method in the uplink. The uplink refers to a wireless link through which a terminal transmits data or control signals to a base station, and the downlink refers to a wireless link through which a base station transmits data or control signals to a terminal. The above multiple access method is typically allocated and operated so that the time-frequency resources for transmitting data or control information to each user do not overlap, that is, so as to establish orthogonality, thereby allowing each user's data or control information to be distinguished.

[0043] As a future communication system beyond LTE, 5G communication systems must be able to freely reflect the diverse needs of users and service providers. Therefore, they must support services that simultaneously satisfy these diverse requirements. Services being considered for 5G communication systems include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low-latency communication (URLLC).

[0044] Below, the frame structure of the 5G system is described in more detail with reference to drawings.

[0045] Figure 1 is a diagram illustrating an example of the basic structure of the time-frequency domain of a wireless communication system. Referring to Figure 1, the basic structure of the time-frequency domain, which is the wireless resource domain where data or control channels are transmitted in a 5G communication system, is described.

[0046] The horizontal axis of Figure 1 represents the time domain, and the vertical axis represents the frequency domain. The basic unit of resources in the time and frequency domains is a resource element (RE, 101), which can be defined as 1 OFDM (orthogonal frequency division multiplexing) symbol (102) in the time axis (or time domain) and 1 subcarrier (103) in the frequency axis (frequency domain). In the frequency domain (For example, 12) consecutive REs can form one resource block (RB, 104).

[0047] Figure 2 is a diagram illustrating an example of the frame, subframe, and slot structure of a 5G system.

[0048] Figure 2 illustrates an example of a structure of a frame (frame, 200), a subframe (subframe, 201), and a slot (slot, 202). One frame (200) can be defined as 10 ms. One subframe (201) can be defined as 1 ms, and therefore one frame (200) can be composed of a total of 10 subframes (201). One slot (202, 203) can be defined as 14 OFDM symbols (i.e., the number of symbols per slot =14). 1 subframe (201) may be composed of one or more slots (202, 203), and the number of slots (202, 203) per 1 subframe (201) may vary depending on the setting value μ (204, 205) for the subcarrier spacing. In an example of FIG. 2, cases where the subcarrier spacing setting value μ = 0 (204) and μ = 1 (205) are illustrated.

[0049]

[0050] *If μ=0(204), 1 subframe (201) can be composed of 1 slot (202), and if μ=1(205), 1 subframe (201) can be composed of 2 slots (203). That is, the number of slots per subframe ( ) may vary, and accordingly the number of slots per frame ( ) may vary. Depending on the subcarrier spacing setting μ and can be defined as shown in Table 1 below.

[0051] μ 0141011142022144043148084141601651432032

[0052] In the following description of the present disclosure, upper layer signaling may be signaling corresponding to at least one or a combination of one or more of the following signaling.

[0053] - MIB (master information block)

[0054] - SIB (system information block) or SIB

[0055] - RRC (radio resource control)

[0056] - MAC CE (medium access control control element)

[0057] In addition, L1 signaling may be signaling corresponding to at least one or a combination of one or more signaling methods using the following physical layer channels or signaling.

[0058] - PDCCH (physical downlink control channel)

[0059] - DCI (downlink control information)

[0060] - Terminal-specific DCI

[0061] - Group common DCI

[0062] - Common DCI

[0063] - Scheduling DCI (e.g. DCI used for scheduling downlink or uplink data)

[0064] - Non-scheduled DCI (e.g. DCI not intended for scheduling downlink or uplink data)

[0065] - PUCCH (physical uplink control channel)

[0066] - UCI (uplink control information)

[0067] Mobile communications and various wireless communication systems that communicate via wireless connections experience path loss at the air interface, and this path loss becomes greater as the frequency band increases. For example, 5G communication systems that communicate in bands above 3 GHz experience higher path loss than LTE that communicates in lower bands, resulting in coverage issues. In addition, some 5G communication systems that operate in mmWave bands are experiencing more severe path loss, which limits their service. 6G communication systems, which aim to support communications over a wider bandwidth than 5G communication systems, are likely to communicate in higher frequency bands than 5G, and thus, path loss is also expected to increase.

[0068] Array antenna systems and MIMO beamforming techniques have been developed to overcome high path attenuation, and these techniques have proven particularly effective in high-frequency bands. The gains from array antennas and MIMO beamforming are achieved by imparting high directionality to signal propagation and concentrating power along a specific path. Furthermore, wireless signals exhibit high straightness in high-frequency bands, and their relatively short wavelengths allow for the implementation of array antennas in a smaller space. Due to these characteristics, it is known that high-frequency bands are very effective in improving performance through MIMO.

[0069] On the other hand, as the directionality of high-frequency band signal propagation with high straightness is enhanced by MIMO, there is a disadvantage in that the signal path attenuation increases significantly and the link performance deteriorates severely when a shadowing environment or, more commonly, a Non-Line of Sight (NLoS) environment is created where the signal propagation path is obscured by obstacles. To overcome the above disadvantages, a method of obtaining additional power gain through signal repetition has been devised. However, existing retransmission techniques have a high radio resource consumption rate compared to the gain that can be obtained, and are therefore only used in certain situations.

[0070] Recently, research has been conducted on a new link adaptation technique that measures the fading factor of a channel and applies a corresponding technique to improve link performance. While existing link adaptation implements operations based on channel information measured in the time or frequency domain, link adaptation techniques that operate based on the fading factor of the channel require more information about the channel. The present invention proposes a method for measuring the channel impulse response (CIR) or channel delay profile, which are pieces of information about the fading factor of the channel, and a method for transmitting the same to a transmitter.

[0071] Currently, various applications are using methods to support specific services based on a device's location or to utilize location information. Traditionally, GPS-based location information has been used to determine a device's location. However, this method has drawbacks such as reduced accuracy in indoor areas, areas with many tall buildings, and densely forested mountainous regions, and service quality being affected by weather. To address these issues, positioning techniques have been developed that estimate a device's location using mobile communication base stations.

[0072] Positioning techniques are based on measuring the distance between a terminal and three or more known base stations, and estimating the terminal's precise location from this distance. The distance between the base station and the terminal is calculated using propagation delay measured via a positioning reference signal (PR-RS, or PRS).

[0073] FIG. 3 is a diagram illustrating an example of measuring a reference signal (RS) and channel propagation delay for position measurement. According to FIG. 3, transmitters (or base stations, or TRPs (transmission and reception points)) 300, 302, and 304 transmit RS#1 (310), RS#2 (312), and RS#3 (314), respectively. A receiver (or terminal) 330 receives each RS, and at this time, the receiver 330 can detect each RS in different (or separated) scanning windows in the time domain. For example, RS#1 (310) can be detected in the scanning window for RS#1 (320), RS#2 (312) can be detected in the scanning window for RS#1 (322), and RS#3 (314) can be detected in the scanning window for RS#1 (324).

[0074] In order to measure the propagation delay, the terminal or receiver performs time domain coherent detection using the time domain sequence used for each RS transmission. For example, it is assumed that RS #1 (310), #2 (312), and #3 (314) are generated using sequences s#1, s#2, and s#3, respectively. At this time, the receiver performs a time domain correlation operation based on sequence s#0 assuming various delay values ​​within the scanning window (320) in order to measure the delay through RS #1 (310). In a more detailed example, the receiver obtains the time domain correlation value between the received signal and sequence s#1 assuming the delay is 0. The receiver obtains the correlation value between the received signal and sequence s#1 assuming the delay is 1 ns. In addition, the receiver takes the time domain correlation value with the sequence s#1 by assuming various delay values ​​belonging to the scanning window (320) of RS #1 (310). The receiver calculates the case showing the highest correlation value among these, and defines the delay value of the case as the delay value of RS #1 (310).

[0075] That is, the terminal or receiver defines a scanning window for delay measurement of each RS signal, defines a delay detection resolution within the scanning window, and defines a group of delay detection candidates according to the scanning window and the resolution. For example, if the scanning window is defined as 50 to 100 ns and the resolution is defined as 5 ns, the group of delay detection candidates is defined as [50, 55, 60, ... 100] ns. That is, the receiver performs delay detection for the 11 delay candidate values. To this end, the receiver generates a delayed form of the sequence according to each of the delay candidate values ​​and calculates a time domain correlation value between the generated signal and the received signal. The receiver selects the delay candidate value showing the largest value among the calculated values ​​as the propagation delay of the corresponding RS.

[0076] The above-described time-domain sequence-based coherent detection task is performed in a similar manner to time-domain synchronization and can require very high receiver complexity. Advances in terminal hardware technology have made it possible to perform such complex operations.

[0077] In general, the channel through which wireless communication is performed takes the form of a multi-path fading channel composed of multiple paths. In the case of the positioning described above, the receiver or terminal generally measures the propagation delay of the signal received through the path with the shortest propagation delay among the channels created between the transmitter and the receiver, for each base station or transmitter that is the measurement target. This is because the purpose of measuring propagation delay is to calculate distance, so the propagation delay is measured through the shortest path or the path closest to the straightest path among the paths that constitute the channel. In addition, considering only the path with the shortest propagation delay among all paths that constitute the channel also has the advantage of reducing the burden of propagation delay measurement on the receiver or terminal by reducing the group of delay measurement candidates.

[0078] As wireless communications evolve to operate at increasingly higher bandwidths and wider frequencies, link performance degradation due to multipath fading is becoming an increasingly serious problem. To overcome this, various performance improvement methods, such as introducing more powerful channel coding techniques, have been studied and introduced. In addition, various techniques that measure channel conditions and utilize them to perform link adaptation or adaptive transmission at the transmitter have been studied, and a link adaptation technique utilizing CIR information has recently been developed.

[0079] CIR measurement requires measuring the propagation delay for each path that constitutes the channel and also measuring its gain, so it can be said to be more difficult to measure than conventional channel measurement. Comparing propagation delay measurement for positioning and CIR measurement, in the case of positioning, there is the burden of having to measure the propagation delay for multiple base stations or transmitters, but there is an advantage in that positioning can be performed by measuring only the delay for the path with the shortest propagation delay. In other words, the size of the scanning window can be made smaller. On the other hand, in the case of CIR measurement, instead of measuring the propagation delay for one base station or transmitter as the basic operation, the delay for multiple paths must be measured, so the size of the scanning window increases.

[0080] Figure 4 is a diagram illustrating propagation delay according to the CDL-C (clustered delay line - C) channel model. According to Figure 4, the channel with the longest propagation delay compared to the path with the shortest propagation delay has an additional normalized delay value of approximately 8.7 ns. For a typical sized urban cell, the delay spread (DS) value is approximately 100 ns, which means that the path with the longest propagation delay compared to the path with the shortest propagation delay has an additional delay of approximately 870 ns.

[0081] To ensure a 1m measurement distance error, the time offset during propagation delay measurements is set to approximately 3ns. This, when applied to the path delay, means that approximately 300 additional time-domain-based correlation detections must be performed to measure CIR. This can cause significant complexity issues for the receiver or terminal.

[0082] The present invention proposes a measurement technique, an RS structure, and an information reporting technique that produce CIR information or information corresponding to CIR with lower complexity than conventional time-domain coherent detection or time-domain correlation. The most significant feature of the technique proposed by the present invention is that it does not perform time-domain scanning when measuring information about path delay or channel delay.

[0083] FIG. 5 is a diagram illustrating an example of a reference signal structure for estimating CIR information or information corresponding to CIR suggested by the present invention and an example of CIR measurement using the reference signal. According to FIG. 5, a transmitter configures (or sets) a plurality of RS structures each having a different frequency domain spacing and transmits information about the RS structures to a receiver. Thereafter, the transmitter performs transmission of an RS having the above structure. For example, RS#1 (500) may have q0 (502) as a frequency domain spacing, RS#2 (510) may have q1 (512) as a frequency domain spacing, and RS#3 (520) may have q2 (522) as a frequency domain spacing. The contents of the present disclosure are not limited by the above examples.

[0084] The above RS structure is q n It consists of two sub-blocks (sub-blocks, hereinafter, can be used interchangeably with resources) having a frequency domain interval of . Each sub-block may be composed of one or more radio resource units, for example, one or more REs or one or more RBs. In each RS transmission, each sub-block is characterized by being composed of the same size, i.e., the same number of radio resources. In addition, the RS structure of the present disclosure is not limited to two sub-blocks, and one q nConstruct two or more sub-blocks for a value or multiple q within one RS n It is possible to set up a structure that allows this to be defined and to have it consist of two or more sub-blocks.

[0085] In addition, when each of the above sub-blocks is composed of multiple radio resources, each of the above sub-blocks is characterized by having the same resource pattern. For example, when the first sub-block is defined for four consecutive RBs and is also defined as a pattern called an even RE within the four consecutive RBs, the second sub-block is also defined for four consecutive RBs and is defined as a pattern called an even RE of the four consecutive RBs. An RS sequence or a specific type of signal may be mapped to each of the above sub-blocks. The RS sequence or the specific type of signal may be determined by various parameters such as a physical cell ID (PCID), UE identity, etc., and the same RS sequence or signal type may be repeated in each of the above sub-blocks.

[0086] In the above repetition, the same sequence may be repeatedly mapped to each sub-block, such that a different phase shift value is applied to each sub-block, but a sequence change operation may be performed for each sub-block. For example, an RS sequence may be mapped in its original form to a sub-block defined in the lowest band. An RS sequence mapped to a sub-block defined in the next band may be generated by applying a phase shift value of θ0 to the RS sequence in its original form. Alternatively, a phase shift value of θ may be applied between the sequence mapped to the second sub-block and the sequence mapped to the first sub-block. nA phase difference called θ can be set. That is, a phase difference called θ1 can be applied between the sequence mapped to the first RE of the first sub-block and the sequence mapped to the first RE of the second sub-block, and a phase difference called θ2 can be applied between the sequence mapped to the second RE of the first sub-block and the sequence mapped to the second RE of the second sub-block. In addition, a phase difference called θ can be applied between the sequence mapped to the nth RE of the first sub-block and the sequence mapped to the nth RE of the second sub-block. n A phase difference called may be applied. Alternatively, each part of the sequence generated by one generator may be mapped to each sub-block. A random sequence, a pseudo random noise sequence (PN code), a Golay sequence, a CAZAC series sequence (Zadoff-Chu, modulated Frank, GCL, etc.) may be used as the RS sequence, and the present disclosure is not limited thereto.

[0087] Each sub-block constituting the above structure is characterized by having the same resource mapping, resource pattern, or wireless resource structure. That is, the RS structure has a resource mapping pattern defined in units of sub-blocks as q nIt is characterized by being configured in a repeating form with a frequency domain interval of . The same sequence or a signal generated through the same sequence can be mapped to the resources defined in each sub-block. For example, sequences generated through the same sequence generation, but having different phase values ​​in each part of the sequence can be mapped to different sub-blocks through an additional phase shift operation. For example, when a signal generated through a frequency domain sequence C0(f) or a time domain sequence c0(t) is transmitted to the lower sub-block (550, or a signal of a lower frequency band) among the two parts constituting RS #1 (500), a signal generated through the same sequence C0(f) or c0(t) is transmitted to the upper sub-block (552, or a signal of a higher frequency band) or by adding a specific phase shift value to the signal. , or c(tT i ) format signals can be transmitted.

[0088] When a signal transmitted in this way is received through two paths, path #1 and path #2, each having propagation delays T1 and T2, the component signals received through each path have additional phase rotations of 2πT1f and 2πT2f, respectively. Or, at frequency f, they have a phase difference of 2π(T1-T2)f. Furthermore, when the same signal is transmitted through frequencies f and f+q, the signals received through each path at the two frequencies f and f+q have additional phase rotations of 2πT1f, 2πT2f, 2πT1f+2πT1q, 2πT2f+2πT2q, respectively.

[0089] At this time, if the q value becomes 2πT1f = 2πT1f + 2πT1q, or mod [2πT1f, 2π] = mod [2πT1f+2πT1q, 2π], the signals received at frequencies f and f+q after passing through path #1 will have the same phase value, and therefore, the signal obtained by combining the two signals will have the maximum RSRP (reference signal received power) value. Alternatively, if mod [2πT1q , 2π] = 0, that is, if 2πT1q = 2π, 4π, 6π, or a multiple of 2π, the signal obtained by combining the signals received at frequencies f and f+q after passing through path #1 will have the maximum RSRP value. This also applies to signals received via path #2, and when the signal passing through path #2 has mod [2πT2q, 2π] = 0, i.e., 2πT2q = 2π, 4π, 6π, etc. and is a multiple of 2π, the RSRP value of the combined signal is maximized when combining the received signals with frequency f and frequency f+q. This method can also be applied when a phase shift is applied to each part.

[0090] Therefore, when the transmitter transmits repeated RSs with different frequency domain intervals and the receiver compares the RSRP values ​​after frequency domain combining, the receiver calculates the delay values ​​T1, T2, ... and T of each path. nThe value can be estimated. In addition, if the conditions mod [2πT1q, 2π] = 0, mod [2πT2q, 2π] = π are satisfied, that is, if 2πT1q has a multiple of 2π such as 2πT1q = 2π, 4π, 6π, etc., and 2πT2q = π, 3π, 5π, etc., a multiple of 2π + π, then the received signal passing through path #1 has the same phase at frequencies f and f+q, while the received signal passing through path #2 has opposite phases at frequencies f and f+q. Therefore, when combining signals received through frequencies f and f+q at q values ​​that satisfy the above conditions, the receiver can measure the RSRP value of the reference signal received through path #1. That is, the gain of path #1 can be measured. Similarly, if 2πT1q has a multiple of 2π + π value such as 2πT1q = π, 3π, 5π, etc., and 2πT2q = a multiple of 2π such as 2π, 4π, 6π, etc., the received signal passing through path #2 has the same phase at frequencies f and f+q, whereas the received signal passing through path #1 has the opposite phase at frequencies f and f+q. Therefore, when combining the signals received through frequencies f and f+q at q values ​​that satisfy the above conditions, the receiver can measure the RSRP value of the reference signal received through path #2. That is, the gain of path #2 can be measured.

[0091] According to the above principle, different q as shown in Fig. 5 n A plurality of RSs are configured to have values, and by performing a frequency domain combining operation for each RS at the receiving end and measuring and comparing the RSRP value after the combining operation, CIR information or information corresponding to the CIR can be obtained.

[0092] Thereafter, the receiver can report at least one of a resource index and an RSRP value to the transmitter (540). The resource index is an index that defines each RS, and a different resource index value, for example, an RS resource index value, can be set for each RS to be measured through tasks such as RS resource configuration, RS resource set configuration, etc. For example, if the combined RSRP of RS #1 has a value greater than the combined RSRP of RS #2 or RS #3, the receiver can report a resource index indicating RS #1, for example, an index value of 1, and the combined RSRP value of RS #1. Alternatively, if the combined RSRP value of RS #2 is the second largest value among the combined RSRP values, the receiver can report an index value indicating RS #1 and the corresponding combined RSRP value of RS #1, and an index value indicating RS #2 and the corresponding combined RSRP value of RS #2 in order of size.

[0093] Alternatively, the receiver may report the above indices in the order of the combined RSRP size without reporting the combined RSRP value. Alternatively, when reporting the combined RSRP value, the receiver may report the largest combined RSRP value and at the same time report the relative sizes of other RSRP values ​​(for example, the ratio to the largest combined RSRP or the difference from the largest combined RSRP) in the order of the combined RSRP size. The number of the above indices and the number of combined RSRP values ​​reported simultaneously can be configured by the base station, and the terminal can report pairs of indices and combined RSRP values ​​less than or equal to the configured number. This reporting method can be modified in an obvious manner and applied to other examples.

[0094] The combining of signals transmitted from each part (or resource) having a specific frequency domain interval below can be mixed with the combining of each part (resource).

[0095] Figures 6 and 7 are diagrams illustrating an example of an RS structure for increasing the reception reliability of RS. The transmitter transmits the signal in a frequency domain interval q in more parts. n You can create and transmit RS to have .

[0096] Fig. 6 is a diagram illustrating an example of an RS structure for increasing the reception reliability of RS. According to Fig. 6, as a method for increasing the reception reliability of RS, the transmitter sets a frequency domain interval q n RS can be generated and transmitted to have multiple parts. According to Fig. 6, RS #1 has a structure in which it is transmitted with an interval of q0 (620) through areas A (600) and A' (602). As a way to increase the reception reliability of RS #1, RS #1 can be repeatedly transmitted or additionally transmitted with an interval smaller than q0. For example, as shown in Fig. 6, the transmitter can perform repeated transmission or additional transmission of RS #1 using B (610), an area adjacent to A (600) on the frequency axis, and B' (612), an area adjacent to A' (602). At this time, areas B (610) and B' (612), where additional transmission is performed, have a frequency domain interval of q0 (620). At this time, the signals mapped to the resources of A(600) and A'(602), B(610) and B'(612) can refer to the above description.

[0097] Therefore, in the same way as measuring RSRP through A (600) and A' (602), the RSRP value for RS #1 or corresponding to the frequency domain interval q0 (620) can be measured twice through additional independent radio resources using areas B (610) and B' (612). The terminal or receiver can combine the two RSRP values ​​to calculate the final RSRP value corresponding to RS #1 or q0. For example, as shown in FIG. 6, the receiver can calculate the final RSRP measurement value through RS #1 by adding the signals received through A (600) and A' (602) and B (610) and B' (612) respectively and performing co-phased combining between the two summed signals (630).

[0098] Although the radio resources of A(600), A'(602) and B(610), B'(612) are set to have the same q0(620) value, since the frequency domain interval called q0(620) is not defined between A(600) and B(610), and between A'(602) and B'(612), the receiver measures the combined RSRP for A(600) and A'(602), and for B(610) and B'(612), respectively. In addition, for the same reason, the two combined RSRP values ​​may have different phase values ​​after combining. Therefore, the receiver performs a task called co-phased combining or phase compensation and combining, which removes the phase difference and then combines them again. Through the above-described double combining operation, the reliability of combined RSRP measurements for reference signals having a frequency domain spacing q0 (620) can be increased. FIG. 6 illustrates an example of two repetitions of radio resources with the same frequency domain spacing, but the present invention is not limited thereto, and the number of repetitions can be freely adjusted.

[0099] Figure 7 is a diagram illustrating another example of an RS structure for increasing the reception reliability of RS. The transmitter has a frequency domain interval q in more parts. n can be generated and transmitted to have RS. According to Fig. 7, q n The reception reliability of each RS can be increased by increasing the number of RS resources that are repeated with a frequency domain interval of . For example, if RS #1 is transmitted through resources A (700) and A' (702) with a frequency domain interval of q0 (710), the transmitter can repeatedly or additionally transmit RS #1 using resource A" (704) with a frequency domain interval of A' (702) and q0 (710) as a way to increase the reception reliability of RS #1. At this time, the signals mapped to the resources of A (700), A' (702), and A'' (704) can refer to the above description.

[0100] As in the case of Fig. 6, according to the example of Fig. 7, the reliability of the combined RSRP measurement can be increased by performing the combined RSRP measurement using more wireless resources. In addition, as a difference from Fig. 6, since all wireless resources have the same frequency domain spacing of q0(620), unlike the case of Fig. 6, the receiver can measure the combined RSRP value through a single combining operation without a double combining operation. Fig. 7 is an example of a case where three wireless resources are designed to have the same frequency domain spacing q0(620), but the number of wireless resources used is not limited, and the number of wireless resources can be freely set to four, five, etc.

[0101] Fig. 8 is a diagram illustrating another example of an RS structure for increasing the reception reliability of an RS. Fig. 8 illustrates an example of using together the means for increasing the reception reliability of an RS used in Figs. 6 and 7. RS #1 may include three resources, such as A (800), A' (802), and A'' (804), each having a frequency domain interval q0 (820). In addition, the frequency resources adjacent to A (800), A' (802), and A'' (804) may include three resources, such as B (810), B' (812), and B'' (814), each also having a frequency domain interval q0 (820). At this time, the signals mapped to the resources of A(800), A'(802), A''(804) and B(810), B'(812), B''(814) can refer to the above description.

[0102] For example, the receiver can calculate the final RSRP measurement value through RS #1 by summing the signals received through A (800), A' (802) and A'' (804), B (810), B' (812) and B'' (814) and performing co-phased combining between the two summed signals (830).

[0103] The examples described in FIGS. 5 to 8 are examples of cases where multiple reference signals need to be transmitted, and when multiple reference signals are generated and transmitted in this way, the terminal or receiver can report the estimated CIR or information corresponding to the CIR to the transmitter by reporting (RS index and) RSRP for each RS, reporting the index of a preferred RS, or reporting the preferred RS index and RSRP of the corresponding RS.

[0104] As a way to reduce RS overhead compared to FIGS. 5 to 8, a method of measuring RSRP values ​​corresponding to multiple q from one RS, as shown in FIG. 9, can be used.

[0105] Figure 9 shows multiple frequency domain intervals q from one RS. n This is a diagram illustrating an example of measuring RSRP corresponding to . According to FIG. 9, the transmitter configures an RS structure having an interval of q0 corresponding to the basic frequency domain interval in the frequency domain and transmits an RS. For example, resources 900 and 902 may have a frequency domain interval of q0 (910), for example, resources 900 and 904 may have a frequency domain interval of 2q0 (912), and for example, resources 900 and 906 may have a frequency domain interval of 3q0 (914).

[0106] When receiving the RS, the receiver can perform combining between parts having a frequency domain interval of nq0 for multiple n values, such as combining between parts having a frequency domain interval of q0 (combining of 900 and 902, RSRP1 (920) is measured), combining between parts having a frequency domain interval of 2q0 (combining of 900 and 904, RSRP2 (922) is measured), etc. In other words, the receiver can measure the RSRP value for each situation where the frequency domain interval is nq0. Compared to the method of FIG. 5, the method of FIG. 9 can produce a plurality of measurement pieces of information with only one RS transmission, and thus wireless resource efficiency can be increased compared to FIG. 5.

[0107] Similar to the examples of FIGS. 6 to 8, the RS reception or measurement reliability can be increased by increasing the amount of RS resources based on the RS structure of FIG. 9. FIG. 10 illustrates a plurality of frequency domain intervals q. nThis is a diagram illustrating an example of increasing the measurement reliability by increasing the amount of resources of one RS corresponding to . According to FIG. 10, there are resources 1000 and 1002 in the RS, and resource 1000 has frequency domain intervals q0(1010), 2q0(1012), and 2q0(1014) between resources 1020, 1030, and 1040, respectively. Resource 1002 has frequency domain intervals q0(1010), 2q0(1012), and 2q0(1014) between resources 1022, 1032, and 1042, respectively. The receiver can, for example, sum signals received from two selected resources among resources 1000, 1020, 1030, and 1040, and sum signals received from two selected resources among resources 1002, 1022, 1032, and 1042, and perform co-phased combining between the two summed signals to produce a final RSRP measurement value via RS.

[0108] FIG. 9 and FIG. 10 are examples of a case where an RS has a constant pattern in the frequency domain, or where an RS is mapped to a resource having the same frequency domain interval, but the RS structure proposed by the present invention is not limited thereto, and various RS structures can be used, as in FIG. 11.

[0109] FIG. 11 is a diagram illustrating an example of an RS mapped to resources having non-regular intervals in the frequency domain. According to FIG. 11, in (a)(1100), the RS may be composed of a resource 1110 and resources having frequency domain intervals q0(1120), q1(1122), and q2(1124), respectively. Alternatively, as in (b)(1150), the RS may be composed of a resource 1170 and resources 1180 having frequency domain intervals q0(1160), q1(1162), and q2(1164), respectively, and a resource 1190 having frequency domain intervals q3(1160), q4(1162), and q5(1164) with the above 1180, respectively. A terminal or receiver that receives such an RS can measure information corresponding to various q values ​​depending on which resource it measures the combined RSRP between reference signals mapped to.

[0110] When performing measurements corresponding to multiple q values ​​through one RS, the receiver or terminal cannot use the method of reporting RSRP by RS index, unlike the case of FIG. 5. In this case, the terminal can use the method of reporting q values ​​and RSRP values ​​corresponding to q. At this time, the receiver can report all q values ​​and RSRP corresponding to the q values, or can report a preferred set or predetermined number of q values ​​and RSRP corresponding to the q values. Alternatively, one of the q values ​​or RSRP reports may be omitted. Alternatively, when RSRP measurement is performed for nq values ​​as in FIGS. 9 and 10, the receiver can report an n value and its corresponding RSRP value. At this time, the receiver can report all n values ​​and RSRP corresponding to the n values, or can report a preferred set or predetermined number of n values ​​and RSRP corresponding to the n values. Alternatively, one of the n values ​​or RSRP reports may be omitted.

[0111] Alternatively, if the RS has a more complex form, as in the case of FIG. 11, the receiver may report an RS sub-pattern index and a corresponding RSRP value. FIGS. 12 and 13 are examples of various sub-patterns and sub-pattern indices.

[0112] Fig. 12 is a diagram illustrating an example of a sub-pattern and a sub-pattern index of RS. Fig. 12 can be understood as an example of configuring the RS resource configuration (which can be mixed with a pattern) of (a)(1100) of Fig. 11 into sub-patterns. In Fig. 12, 1200 corresponds to a pattern of RS resources, and the possible frequency domain intervals in 1200 correspond to each sub-pattern. That is, sub-pattern#1(1210), sub-pattern#2(1220), and sub-pattern#3(1230) correspond to configurations of resources having different frequency domain intervals.

[0113] In this way, for one RS, a sub-pattern is defined for each resource pair or resource pair(s) with different frequency domain intervals. That is, each sub-pattern represents an RS substructure for a different q value. The receiver or terminal can measure and report for multiple q values ​​by measuring RSRP for each sub-pattern and reporting the sub-pattern index and the RSRP value corresponding to each sub-pattern index. At this time, the receiver can report the RSRP corresponding to all sub-pattern indices and each sub-pattern index, or report a preferred or predetermined number of sub-pattern indices and the RSRP corresponding to the sub-pattern indices. Alternatively, reporting of one of the sub-pattern indices or RSRPs may be omitted.

[0114] Fig. 13 is a diagram illustrating another example of a sub-pattern and sub-pattern index of RS. Fig. 13 can be understood as an example of configuring the RS resource configuration (which can be mixed with a pattern) of Fig. 11 (b) (1150) into sub-patterns. In Fig. 13, 1300 corresponds to a pattern of RS resources, and the possible frequency domain intervals in 1300 correspond to each sub-pattern. That is, sub-pattern#1(1310), sub-pattern#2(1320), sub-pattern#3(1330), sub-pattern#4(1340), sub-pattern#5(1350), and sub-pattern#6(1360) correspond to configurations of resources having different frequency domain intervals.

[0115] In the example of Fig. 13, for one RS, a sub-pattern is defined for each resource pair or resource pairs having different frequency domain intervals. That is, each sub-pattern represents an RS substructure for a different q value. The receiver or terminal can measure and report for multiple q values ​​by measuring RSRP for each sub-pattern and reporting the sub-pattern index and the RSRP value corresponding to each sub-pattern index. At this time, the receiver can report RSRP corresponding to all sub-pattern indices and each sub-pattern index, or can report a preferred or predetermined number of sub-pattern indices and the RSRP corresponding to the sub-pattern indices. Alternatively, reporting of one of the sub-pattern indices or RSRPs may be omitted.

[0116] The above examples are examples of a method for measuring and calculating CIR or information corresponding to CIR through frequency domain signal processing after FFT (fast Fourier transform) operation, but the technique proposed by the present invention can also be implemented through time domain signal processing. When an RS sequence and an RS structure, or an RS sequence and an RS pattern, are defined, the receiver can generate a time domain filter or a detection sequence corresponding to the sequence and structure or / and the pattern. That is, the receiver can generate a time domain filter or a time domain detection sequence corresponding to each q value. Through a time domain correlation operation using the above filter or detection sequence, the receiver can measure an RSRP value corresponding to each q value. Fig. 14 is an example of this.

[0117] More specifically, the operation of measuring the combined RSRP between signals received through a specific frequency section as shown in the example above can also be explained as a correlation operation through a frequency domain sequence mapped to a specific frequency section. For example, the combined RSRP measurement for each sub-pattern as shown in FIGS. 12 and 13 produces the same result as the operation of measuring RSRP after correlation and correlation through a frequency domain sequence mapped to the corresponding pattern.

[0118] For example, if a receiver maps a frequency domain sequence having a length of 2,

[0011] , to the position of sub-pattern #1 (1210) of FIG. 12 of the received signal, performs a correlation operation, and performs RSRP measurement after correlation, this produces the same result as measuring the combined RSRP between signals received at the position of sub-pattern #1 (1210) of FIG. 12. The receiver can convert the frequency domain sequence mapped to sub-pattern #1 (1210) of FIG. 12 and having a value of

[0011] into a time domain sequence through an inverse fast Fourier transform (IFFT) operation. If the receiver performs a correlation operation between the time domain sequence and the received signal and measures the RSRP value, it can obtain the same result as measuring the combined RSRP in the frequency domain. That is, the receiver can convert the frequency domain combining operation into a time domain sequence correlation operation, and replace the frequency domain combined RSRP value measurement with the RSRP value measurement of the time domain sequence correlation. In the above example, a simple sequence of

[0011] is used, but various types of sequences can be used at the receiver depending on the type of sequence used when generating the RS.

[0119] Fig. 14 is a diagram illustrating an example of time domain signal processing performed by a receiver. According to Fig. 14, an RS is generated in a form in which a sequence of length 5 called [abcde] is mapped to a radio resource shown in pattern #0 (1400). The frequency domain interval of the radio resources corresponds to q0. Thereafter, the RS is transmitted and received by the receiver. As described above, the frequency domain combined RSRP measurement corresponding to the pattern #0 (1400) is mapped to pattern #0 and can be measured through correlation with a signal having a sequence called [abcde].

[0120] As explained above, this can be converted to a time domain correlation operation. That is, the receiver can generate a detection sequence or detection signal corresponding to the pattern #0 (1400) through an IFFT of a signal generated by the pattern #0 (1400) and the sequence [abcde]. Before performing an IFFT operation on the received RS, the receiver can measure a combined RSRP value corresponding to the pattern #0 (1400), i.e., corresponding to the frequency domain interval q0, by performing a time domain correlation operation between the received RS and the detection signal.

[0121] In the same manner, a new sequence generated by combining the radio resources shown in Pattern #1 (1410) and the sequence [abcde], i.e., a signal generated by mapping the sequence [ace] to the radio resources shown in Pattern #1 (1410), can be generated by the receiver performing an IFFT operation on the signal, thereby generating a time domain detection signal corresponding to Pattern #1 (1410) or corresponding to the frequency domain interval 2q0. This is because the interval of the radio resources in Pattern #0 (1400) is q0, and thus the interval of the radio resources to which a and c, and c and e are mapped in Pattern #1 (1410) corresponds to 2q0. In the same manner, the receiver can generate a time domain detection signal corresponding to Pattern #2 (1420) or the frequency domain interval 3q0. This is because the interval of the radio resources to which a and d are mapped in Pattern #2 (1420) corresponds to 3q0.

[0122] At this time, frequency domain combined RSRP values ​​corresponding to each of the frequency domain intervals q0, 2q0, and 3q0 can be calculated through time domain correlation between the detection signal generated by the receiver and the reception signal.

[0123] This method can be particularly useful when m-sequences are used as sequences mapped to wireless resources.

[0124] The correlation operation specified in the present invention is, for example, taking a correlation between frequency domain signals X(f) and Y(f). or It can be explained by the operation of finding the value of . In the above formula, N is the number of wireless resources on which the combining operation or the first combining operation is performed, and f n represents the frequency domain location of the above wireless resource. Also, the correlation operation between the time domain signals x(t) and y(t) is or It can be implemented as an operation to obtain a value. M means the number of samples used in the correlation operation, and t m means the time domain position of each sample. Also, according to the notation, the correlation operation between frequency domain signals is or It can also be expressed in the form of etc.

[0125] The time domain detection signal generated according to each of the above patterns can be distinguished and defined by a detection signal ID or a detection sequence ID. For example, a detection sequence corresponding to pattern #0 can be defined as detection sequence #0, etc. In order to support the above operation, the transmitter can transmit information about the detection sequence to the receiver. For example, information related to the generation of the detection sequence can be transmitted. The generation information can be information about a frequency domain pattern and sequence, or direct information about the generation of a time domain sequence. The receiver can report to the transmitter an index of one or more detection sequence IDs or patterns and an RSRP value corresponding to the index of each detection sequence ID or pattern. At this time, the receiver can report the index of all detection sequence IDs or patterns and the RSRP corresponding to the index of the detection sequence ID or pattern, or can report the index of a preferred set or predetermined detection sequence ID or pattern and the RSRP corresponding to the index of the detection sequence ID or pattern. Alternatively, the reporting of one of the indexes of the detection sequence ID or pattern or the RSRP can be omitted. These reports allow the receiver to report CIR information or information corresponding to the CIR to the transmitter.

[0126] In the above example, the RS receiver or terminal can measure the RSRP value for each detection sequence and report the detection sequence index and the RSRP for each detection sequence, thereby reporting the CIR information or information corresponding to the CIR to the RS transmitter or base station.

[0127] In the above description, RSRP was considered as a means of measuring CIR or information corresponding to CIR, but other measurement parameters besides RSRP can also be used in the same manner. For example, parameters such as RSRQ (reference signal received quality), SNR (signal-to-noise ratio), and SINR (signal-to-interference and noise ratio) can be used in the same manner.

[0128] FIG. 15 is a diagram illustrating an example of the operation of a transmitter performing at least one embodiment of the present disclosure.

[0129] According to FIG. 15, a transmitter can transmit RS configuration information to a receiver (1500). The RS configuration information can be transmitted through upper layer signaling and / or L1 signaling. The RS configuration information can include at least one of a type of RS sequence, an RS index or identifier, a time and / or frequency resource to which the RS is mapped, information on repeated transmission of the RS, phase shift information applied to the RS, and RS transmission power, and information not transmitted by the RS configuration information can be predetermined information. In particular, the RS configuration information includes information on a frequency domain interval of resources constituting the RS, and the information can be directly indicated or indirectly indicated through an indication of an RS resource, etc. In addition, the RS configuration information can include at least one of the configuration information described above.

[0130] The transmitter transmits an RS corresponding to the RS configuration information to the receiver (1510). Thereafter, the transmitter receives an RS measurement report from the receiver (1520). The RS measurement report may be measured based on the RS transmitted by the transmitter, and may be understood as CIR information or information corresponding to the CIR. The RS measurement report may be performed through L1 signaling (particularly UCI) or through upper layer signaling.

[0131] A transmitter can configure an RS measurement report for a receiver. The RS measurement report configuration information may include configuration information for the resource to which the RS measurement report is transmitted and configuration information for information to be included in the RS measurement report. The configuration for information to be included in the RS measurement report may follow the above-described content.

[0132] The above RS measurement report may include RSRP, but below RSRP may be replaced with other measurement parameters. The RS measurement report may include RS index or frequency domain interval of RS, sub-pattern index of RS resource and RSRP information corresponding to each RS index or frequency domain interval of RS, sub-pattern index of RS resource, and RS index or frequency domain interval of RS, sub-pattern index of RS resource or RSRP information may be omitted. Measurement results for all RSs transmitted by the transmitter may be included in the RS measurement report, or RS index or frequency domain interval of RS, sub-pattern index of RS resource (and corresponding RSRP information) may be reported according to at least one of a predetermined number, a number set by the transmitter, or a number determined according to the capability of the receiver.

[0133] The above flowchart illustrates exemplary methods that can be implemented according to the principles of the present disclosure, and various modifications may be made to the methods depicted in the flowcharts herein. For example, although depicted as a series of steps, various steps in each drawing may overlap, occur in parallel, occur in different orders, or occur multiple times. In other instances, steps may be omitted or replaced with other steps.

[0134] FIG. 16 is a diagram illustrating an example of the operation of a receiving end performing at least one embodiment of the present disclosure.

[0135] According to FIG. 16, a receiver can receive RS configuration information from a transmitter (1600). The RS configuration information can be transmitted through upper layer signaling and / or L1 signaling. The RS configuration information can include at least one of a type of RS sequence, an RS index or identifier, a time and / or frequency resource to which the RS is mapped, information on repeated transmission of the RS, phase shift information applied to the RS, and RS transmission power, and information not transmitted by the RS configuration information can be predetermined information. In particular, the RS configuration information includes information on a frequency domain interval of resources constituting the RS, and the information can be directly indicated or indirectly indicated through an indication of an RS resource, etc. In addition, the RS configuration information can include at least one of the configuration information described above.

[0136] The receiver detects the RS transmitted by the transmitter based on the RS configuration information (1610) and generates an RS measurement report (1620). Based on the detected RS, the receiver can measure RSRP or other measurement parameters according to the RS index, the frequency domain interval of the RS, or the sub-pattern index of the RS resource. The detailed measurement method can follow the above-described content. Thereafter, the receiver transmits the RS measurement report to the transmitter (1630). The RS measurement report can be performed through L1 signaling (particularly UCI) or through higher layer signaling.

[0137] A receiver can configure an RS measurement report from a transmitter. The RS measurement report configuration information may include configuration information about the resource to which the RS measurement report is transmitted and configuration information about information to be included in the RS measurement report. The configuration of information to be included in the RS measurement report may follow the above-described content.

[0138] The above RS measurement report may include RSRP, but below RSRP may be replaced with other measurement parameters. The RS measurement report may include RS index or frequency domain interval of RS, sub-pattern index of RS resource and RSRP information corresponding to each RS index or frequency domain interval of RS, sub-pattern index of RS resource, and RS index or frequency domain interval of RS, sub-pattern index of RS resource or RSRP information may be omitted. Measurement results for all RSs transmitted by the transmitter may be included in the RS measurement report, or RS index or frequency domain interval of RS, sub-pattern index of RS resource (and corresponding RSRP information) may be reported according to at least one of a predetermined number, a number set by the transmitter, or a number determined according to the capability of the receiver.

[0139] The above flowchart illustrates exemplary methods that can be implemented according to the principles of the present disclosure, and various modifications may be made to the methods depicted in the flowcharts herein. For example, although depicted as a series of steps, various steps in each drawing may overlap, occur in parallel, occur in different orders, or occur multiple times. In other instances, steps may be omitted or replaced with other steps.

[0140] Figure 17 is a diagram illustrating the structure of a terminal in a wireless communication system according to an example of the present disclosure. While the present disclosure assumes that the terminal is a receiving end, it is also possible for the terminal to be a transmitting end.

[0141] Referring to FIG. 17, the terminal may include a transceiver, which refers to a terminal receiving unit (1700) and a terminal transmitting unit (1710), a memory (not shown), and a terminal processing unit (1705) (terminal control unit or processor). Depending on the communication method of the terminal described above, the transceiver units (1700, 1710), the memory, and the terminal processing unit (1705) of the terminal may operate. However, the components of the terminal are not limited to the examples described above. For example, the terminal may include more or fewer components than the components described above. In addition, the transceiver unit, the memory, and the processor may be implemented in the form of a single chip.

[0142] The transceiver (1700, 1710) can transmit and receive signals with the base station. Here, the signals can include control information and data. To this end, the transceiver (1700, 1710) can be configured with an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and frequency-converts a received signal. However, this is only an example of the transceiver (1700, 1710), and the components of the transceiver (1700, 1710) are not limited to the RF transmitter and RF receiver. In addition, the transceiver (1700, 1710) can receive a signal through a wireless channel and output it to the processor (1705), and transmit a signal output from the processor (1705) through the wireless channel.

[0143] The memory can store programs and data necessary for the operation of the terminal. Furthermore, the memory can store control information or data included in signals transmitted and received by the terminal. The memory can be configured as a storage medium, such as a ROM, RAM, hard disk, CD-ROM, or DVD, or a combination of storage media. Furthermore, there can be multiple memories. Furthermore, according to one example, the memory can store a program for performing the aforementioned RB set determination method.

[0144] In addition, the processor (1705) can control a series of processes so that the terminal can operate according to the above-described embodiment. There may be a plurality of processors (1705), and the processors can perform component control operations of the terminal by executing a program stored in the memory. The processor (1705) can control components of the terminal so that the above-described embodiments of the present disclosure are performed by executing the program stored in the memory. In addition, the processor (1705) can be an Application Processor (AP), a Communication Processor (CP), a circuit, an application-specific circuit, or at least one processor.

[0145] Figure 18 is a diagram illustrating the structure of a base station in a wireless communication system according to an example of the present disclosure. In the present disclosure, it is assumed that the base station is a transmitter, but it is also possible for the base station to be a receiver.

[0146] Referring to FIG. 18, the base station may include a transceiver, which refers to a base station receiver (1830) and a base station transmitter (1810), a memory (not shown), and a base station processor (1805) (base station control unit or processor). Depending on the communication method of the base station described above, the transceiver (1800, 1810), the memory, and the base station processor (1805) of the base station may operate. However, the components of the base station are not limited to the examples described above. For example, the base station may include more or fewer components than the components described above. In addition, the transceiver, the memory, and the processor may be implemented in the form of a single chip.

[0147] The transceiver (1800, 1810) can transmit and / or receive signals with the terminal. Here, the signals can include control information and data. To this end, the transceiver (1800, 1810) can be configured with an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and frequency-converts a received signal. However, this is only an example of the transceiver (1800, 1810), and the components of the transceiver (1800, 1810) are not limited to the RF transmitter and RF receiver. In addition, the transceiver (1800, 1810) can receive a signal through a wireless channel, output it to the processor (1805), and transmit the signal output from the processor (1805) through the wireless channel.

[0148] The memory can store programs and data necessary for the operation of the base station. Furthermore, the memory can store control information or data included in signals transmitted and received by the base station. The memory can be configured as a storage medium, such as a ROM, RAM, hard disk, CD-ROM, or DVD, or a combination of storage media. Furthermore, there can be multiple memories. Furthermore, according to one example, the memory can store a program for performing the aforementioned RB set determination method.

[0149] The processor (1805) can control a series of processes so that the base station can operate according to the embodiments of the present disclosure described above. There may be a plurality of processors (1805), and the processors (1805) can perform component control operations of the base station by executing a program stored in a memory. The processor (1805) can control components of the terminal so that the embodiments of the present disclosure described above are performed by executing the program stored in the memory. In addition, the processor (1805) can be an Application Processor (AP), a Communication Processor (CP), a circuit, an application-specific circuit, or at least one processor.

[0150] It should be noted that the configuration diagrams, exemplary diagrams of control / data signal transmission / reception methods, and exemplary diagrams of operating procedures illustrated in FIGS. 1 to 18 are not intended to limit the scope of the embodiments of the present disclosure. That is, not all components, entities, or operational steps described in FIGS. 1 to 18 should be construed as essential components for the implementation of the disclosure, and the disclosure may be implemented without detracting from its essence even if only some components are included.

[0151] The methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0152] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. The one or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.

[0153] These programs (software modules, software) may be stored in a non-volatile memory including random access memory, flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage devices, compact disc ROMs (CD-ROMs), digital versatile discs (DVDs) or other forms of optical storage devices, magnetic cassettes, or may be stored in a memory configured as a combination of some or all of these. In addition, each configuration memory may be included in multiple numbers.

[0154] Additionally, the program may be stored on an attachable storage device that is accessible via a communication network, such as the Internet, an intranet, a local area network (LAN), a wide local area network (WLAN), a storage area network (SAN), or a combination thereof. Such a storage device may be connected to a device implementing an embodiment of the present disclosure via an external port. Additionally, a separate storage device on the communication network may be connected to a device implementing an embodiment of the present disclosure.

[0155] In the specific embodiments of the present disclosure described above, components included in the invention are expressed singularly or plurally, depending on the specific embodiment presented. However, the singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components. Components expressed in plural may be composed of singular elements, or components expressed in singular may be composed of plural elements.

[0156] Meanwhile, the order of description in the drawings illustrating the method of the present invention does not necessarily correspond to the order of execution, and the order of precedence may be changed or executed in parallel. Alternatively, the drawings illustrating the method of the present invention may omit some components and include only some components, as long as it does not harm the essence of the present invention. Furthermore, the method of the present invention may be executed by combining some or all of the contents included in each embodiment, as long as it does not harm the essence of the invention.

Claims

1. In a method performed by a base station in a communication system, A step of transmitting reference signal (RS) setting information and RS measurement report setting information to a terminal; A step of transmitting an RS related to the RS setting information to the terminal; and comprising a step of receiving an RS measurement report from the terminal; A method characterized in that, when the RS is composed of a first signal and a second signal and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report includes information related to q1 and a combined RSRP (reference signal received power) of the first signal and the second signal.

2. In paragraph 1, If the RS includes a third signal in addition to the first signal and the second signal, and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the third signal corresponds to q2, the RS measurement report includes information related to the q1 and a combined RSRP of the first signal and the second signal, and information related to the q2 and a combined RSRP of the first signal and the third signal, Alternatively, when the RS is composed of a plurality of sub-patterns, the RS measurement report is characterized in that it includes a preset number of pairs of sub-pattern indices and RSRPs corresponding to the sub-patterns in descending order of RSRP values.

3. In paragraph 1, The above RS configuration information includes information about RS resources of the RS or information about at least one sub-pattern, A method characterized in that the information about the RS resource or the information about each sub-pattern indicates the time domain and / or frequency domain resources of the RS.

4. In paragraph 1, A method characterized in that the RS configuration information includes information on frequency domain resources of the RS, and the frequency resources of the RS are set to have an interval smaller than a frequency domain interval q within a specific frequency domain region, and an interval of the frequency domain interval q exists between the specific frequency domain regions.

5. In a method performed by a terminal in a communication system, A step of receiving reference signal (RS) setting information and RS measurement report setting information from a base station; A step of receiving an RS related to the RS setting information through the terminal; A step of checking the RSRP (reference signal received power) related to the RS based on the RS; and comprising a step of transmitting an RS measurement report to the base station; A method characterized in that, when the RS is composed of a first signal and a second signal and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report includes information related to q1 and a combined RSRP of the first signal and the second signal.

6. In paragraph 5, If the RS includes a third signal in addition to the first signal and the second signal, and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the third signal corresponds to q2, the RS measurement report includes information related to the q1 and a combined RSRP of the first signal and the second signal, and information related to the q2 and a combined RSRP of the first signal and the third signal, Or, if the RS is composed of a plurality of sub-patterns, the RS measurement report is characterized in that it includes a preset number of pairs of sub-pattern indices and RSRPs corresponding to the sub-patterns in descending order of RSRP values.

7. In paragraph 5, The above RS configuration information includes information about RS resources of the RS or information about at least one sub-pattern, A method characterized in that the information about the RS resource or the information about each sub-pattern indicates the time domain and / or frequency domain resources of the RS.

8. In paragraph 5, A method characterized in that the RS configuration information includes information on frequency domain resources of the RS, and the frequency resources of the RS are set to have an interval smaller than a frequency domain interval q within a specific frequency domain region, and an interval of the frequency domain interval q exists between the specific frequency domain regions.

9. In a method performed by a base station in a communication system, At least one transceiver; At least one processor communicatively connected to said at least one transceiver; and Communicably connected to at least one processor, and executable individually or in any combination of said at least one processor, such that said base station: Transmit reference signal (RS) setting information and RS measurement report setting information to the terminal, Transmitting an RS related to the RS setting information to the terminal, and A memory storing a command to receive an RS measurement report from the terminal; A base station, characterized in that when the RS is composed of a first signal and a second signal and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report includes information related to q1 and a combined RSRP (reference signal received power) of the first signal and the second signal.

10. In paragraph 9, If the RS includes a third signal in addition to the first signal and the second signal, and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the third signal corresponds to q2, the RS measurement report includes information related to the q1 and a combined RSRP of the first signal and the second signal, and information related to the q2 and a combined RSRP of the first signal and the third signal, Or, if the RS is composed of a plurality of sub-patterns, the base station is characterized in that the RS measurement report includes a preset number of pairs of sub-pattern indices and RSRPs corresponding to the sub-patterns in descending order of RSRP values.

11. In paragraph 9, The above RS configuration information includes information about RS resources of the RS or information about at least one sub-pattern, Information about the above RS resource or information about each sub-pattern indicates time domain and / or frequency domain resources of the RS, Or, the RS configuration information includes information on frequency domain resources of the RS, and the frequency resources of the RS are set to have an interval smaller than a frequency domain interval q within a specific frequency domain region, and an interval of the frequency domain interval q exists between the specific frequency domain regions. A base station.

12. In a method performed by a terminal in a communication system, At least one transceiver; At least one processor communicatively connected to said at least one transceiver; and Communicably connected to at least one processor, and executable individually or in any combination of said at least one processor, such that said terminal: Receive reference signal (RS) setting information and RS measurement report setting information from the base station, Receive RS related to the RS setting information through the terminal, Based on the above RS, check the RSRP (reference signal received power) related to the above RS, and A memory storing a command to transmit an RS measurement report to the base station; A terminal characterized in that when the RS is composed of a first signal and a second signal and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the second signal corresponds to q1, the RS measurement report includes information related to q1 and a combined RSRP of the first signal and the second signal.

13. In paragraph 12, If the RS includes a third signal in addition to the first signal and the second signal, and a frequency domain interval between a frequency resource of the first signal and a frequency resource of the third signal corresponds to q2, the RS measurement report includes information related to the q1 and a combined RSRP of the first signal and the second signal, and information related to the q2 and a combined RSRP of the first signal and the third signal, Or, if the RS is composed of a plurality of sub-patterns, the terminal is characterized in that the RS measurement report includes a preset number of pairs of sub-pattern indices and RSRPs corresponding to the sub-patterns in descending order of RSRP values.

14. In paragraph 12, The above RS configuration information includes information about the RS resource of the RS or the sub-pattern of the RS, A terminal characterized in that the information about the RS resource or a sub-pattern of the RS indicates time and / or frequency resources of the RS.

15. In paragraph 12, A terminal characterized in that the RS configuration information includes information on frequency domain resources of the RS, and the frequency resources of the RS are set to have an interval smaller than a frequency domain interval q within a specific frequency domain region, and an interval of the frequency domain interval q exists between the specific frequency domain regions.

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