Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives a synchronization signal / physical broadcast channel (SS / PBCH) block including a first synchronization signal, a second synchronization signal, and a physical broadcast channel in a first wireless communication system, and receives a signal group for a second wireless communication system in a second wireless communication system; and a control unit that controls at least one of synchronization processing, frequency offset correction, identification of a cell ID, acquisition of system information, and cell positioning in the second wireless communication system on the basis of both the SS / PBCH block and the signal group.

Description

Technical Field

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system. Background Art

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further high-speed data rates, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further large capacity and high performance of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Research is also underway on a successor system to LTE (for example, also referred to as the 5th generation mobile communication system (5G), 5G + (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.).

[0004] Prior Art Documents

[0005] Non-Patent Documents

[0006] Non-Patent Document 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)", April 2010 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] In future wireless communication systems (e.g., wireless communication systems after Rel. 17 / 5G, after 6G), it is also envisioned to introduce signals with characteristics different from those of existing systems. For example, it is envisioned to utilize new signals in specific operations in future wireless communication systems (e.g., at least one of an initial connection operation, a demodulation operation, and a positioning operation).

[0009] However, there has not been sufficient research on how to design or characterize new signals. In the case where newly introduced / supported signals cannot be properly utilized, there is a concern about deterioration in communication quality.

[0010] The present disclosure has been made in view of such points, and one of its objectives is to provide a terminal, a wireless communication method, and a base station that can appropriately perform communication even when new signals are introduced / supported.

[0011] Means for Solving the Problem

[0012] A terminal according to one aspect of the present disclosure includes: a receiving unit that receives a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block including a first synchronization signal, a second synchronization signal, and a physical broadcast channel in a first wireless communication system, and receives a signal group for the second wireless communication system in the second wireless communication system; and a control unit that controls at least one of synchronization processing, frequency offset correction, identification of a cell ID, acquisition of system information, and cell positioning in the second wireless communication system based on both the SS / PBCH block and the signal group.

[0013] Advantageous Effects of the Invention

[0014] According to one aspect of the present disclosure, communication can be appropriately performed even when new signals are introduced / supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A And Figure 1B is a diagram showing an example of single-carrier transmission / multi-carrier transmission.

[0016] Figure 2A And Figure 2B is a diagram showing an example of symbol lengths corresponding to single-carrier transmission / multi-carrier transmission.

[0017] Figure 3A And Figure 3B is a diagram showing an example of signal generation applied to single-carrier transmission.

[0018] Figure 4A And Figure 4B is a diagram showing another example of signal generation applied to single-carrier transmission.

[0019] Figure 5A and Figure 5B is a diagram showing an example in the case of applying single - carrier transmission in the downlink.

[0020] Figure 6 is a diagram showing an example of a frequency reuse method for 5G.

[0021] Figure 7 is a diagram showing an example of a frame structure after 6G.

[0022] Figure 8 is a diagram showing an example of the characteristics of a new signal (e.g., pilot signal) supported in 6G in the first embodiment.

[0023] Figures 9A - 9C is a diagram showing an example of the mapping pattern of a new signal (e.g., pilot signal) supported in 6G in the first embodiment.

[0024] Figure 10A and Figure 10B is a diagram showing another example of the mapping pattern of a new signal (e.g., pilot signal) supported in 6G in the first embodiment.

[0025] Figure 11 is a diagram showing an example of multiple candidates (patterns) of the mapping pattern of a new signal (e.g., pilot signal) supported in 6G in the first embodiment.

[0026] Figure 12 is a diagram showing another example of the mapping pattern of a new signal (e.g., pilot signal) supported in 6G in the first embodiment.

[0027] Figure 13 is a diagram showing an example of a signal group for initial access operation supported in 6G in the second embodiment.

[0028] Figure 14 is a diagram showing another example of a signal group for initial access operation supported in 6G in the second embodiment.

[0029] Figure 15 is a diagram showing another example of a signal group for initial access operation supported in 6G in the second embodiment.

[0030] Figure 16 is a diagram showing an example of the schematic structure of a wireless communication system related to one embodiment.

[0031] Figure 17 is a diagram showing an example of the structure of a base station related to one embodiment.

[0032] Figure 18This is a diagram showing an example of the structure of a user terminal according to an embodiment.

[0033] Figure 19 This is a diagram showing an example of the hardware structures of a base station and a user terminal according to an embodiment.

[0034] Figure 20 This is a diagram showing an example of a vehicle according to an embodiment. Detailed Embodiment

[0035] (Terahertz (THz) Band)

[0036] In future wireless communication systems (e.g., 6G), it is envisioned that the utilization of high-frequency bands such as terahertz waves will further progress. For example, it is considered to construct the area / coverage of a cell using a large number of thin beams, thereby providing communication services.

[0037] In the terahertz band, compared with bands below 6 GHz (e.g., Sub6) and millimeter waves (e.g., millimeter wave: mmW) operating in 5G, a wider bandwidth can be effectively utilized. In addition, in 6G, due to the influence of ultra-wideband / single-carrier transmission, it is also envisioned that the symbol length will become extremely short, and the impact on parameter sets (e.g., Numerology) needs to be studied.

[0038] In regions with high frequencies such as the terahertz band, the linearity of the transmitted signal / channel (or beam) is high, and it is difficult to effectively utilize reflected waves. Therefore, it is envisioned that it will be difficult to utilize high-order MIMO such as multi-stream transmission, and the frequency selectivity will become lower. In addition, since it is easily affected by human body occlusion or weather, it is envisioned that ensuring line-of-sight (LOS) becomes important. Here, LOS can also mean that the UE and the base station are in an environment where they can see each other (or there are no obstacles).

[0039] In addition, in the terahertz band, it is also envisioned that the influence of phase noise, etc. becomes stronger, and it is difficult to perform high-order modulation. In addition, there are also concerns that the performance such as the linearity of the amplifier decreases, and distortion occurs in OFDM, etc. supported in existing systems (e.g., before Rel.17). Therefore, in regions with high frequencies such as the terahertz band, the utilization of single-carrier transmission is envisioned.

[0040] (Single-Carrier Transmission)

[0041] Single-carrier transmission is a method of performing modulation using a single carrier (see Figure 1A ). Figure 1A An example of a single-carrier method (e.g., Method 1) is shown. In the single-carrier method (e.g., Method 1), multiple carriers that operate independently are used.

[0042] On the other hand, the method of using multiple carriers for modulation is called multi-carrier transmission (see Figure 1B ). Figure 1B An example of a multi-carrier method (eg, method 2) is shown.

[0043] In the time domain, if the single-carrier method and the multi-carrier method are compared, the single-carrier method has a shorter symbol length than the multi-carrier method (see Figure 2A , Figure 2B ). Figure 2A An example of the symbol length for single carrier transmission is shown. Figure 2B An example of the symbol length of multi-carrier transmission is shown.

[0044] When operation in the terahertz band is envisioned, it is also possible to effectively utilize a wider bandwidth. In such a case, it is also envisioned that the time direction becomes more dense (for example, the symbol length becomes shorter).

[0045] As a signal generation in the case of using a single carrier method, more than one process may be applied. For example, the signal generation may be performed based on at least one of a generation method that performs only temporary modulation (e.g., method 1) or a generation method based on DFT-spread OFDM (DFT-S-OFDM: Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing) (e.g., method 2).

[0046] Figure 3A An example of signal generation using method 1 is shown. For example, a data sequence after temporary modulation is passed through a modulator to generate a transmission sequence.

[0047] Figure 3B An example of signal generation using method 2 is shown. After DFT processing is performed on the temporarily modulated data sequence, it is mapped to subcarriers and subjected to inverse fast Fourier transform (IFFT) processing. After that, a cyclic prefix (CP) is added to generate a transmission sequence.

[0048] In addition, the signal generation method of method 1 / method 2 is an example, and the signal generation method in the case of single carrier transmission is not limited to this. Some processing can be omitted, other processing can be added, and some processing can be replaced with other processing. For example, the CP assignment process can be added to method 1 (see Figure 4A Alternatively, in method 2, the CP assignment process is omitted (see Figure 4B ).

[0049] On the other hand, in single-carrier transmission, it is difficult to multiplex multiple signals / channels in the frequency domain for a certain UE. For example, consider the following situation: when single-carrier transmission is applied in the DL, it is impossible to directly utilize the DL channels / DL signals supported in the existing system (e.g., Rel. 15-17).

[0050] The synchronization block (e.g., SS / PBCH block) supported in the existing system is composed of PSS / SSS / PBCH (refer to Figure 5A ). Since SSS and a part of PBCH (or DMRS for PBCH) have a multiplexed structure in the frequency domain, it is difficult to utilize the SS / PBCH block of the existing system when using single-carrier transmission.

[0051] When providing synchronization signals, etc. using single-carrier transmission in the downlink, consider a method of configuring not in the frequency domain but in the time domain (e.g., mapping orthogonal sequences in the time domain) (refer to Figure 5B ). In this way, when using single-carrier transmission, multiple channels / signals are transmitted not by frequency multiplexing but by occupying a certain time of the carrier.

[0052] On the other hand, in the existing system, signal groups that do not transmit data (e.g., synchronization signals (SS), reference signals (RS)) are respectively mapped in the frequency domain in the most appropriate form. Figure 6 It is a diagram showing an example of frequency multiplexing in the existing system (e.g., Rel. 15-17).

[0053] In 5G, the shared channels (e.g., PDSCH / PUSCH) applying the multi-carrier method (e.g., CP-OFDM) and the DMRS for the shared channels are frequency multiplexed. As an example, the DMRS for PDSCH is discretely inserted in the PDSCH in units of resource elements (e.g., RE). In addition, SSS and a part of PBCH (or DMRS for that part of PBCH) are multiplexed in the frequency domain. On the other hand, the UL channels and DMRS (e.g., PUSCH and DMRS for PUSCH) applying the single-carrier method (e.g., DFT-spread OFDM) are configured without frequency multiplexing.

[0054] Figure 6 The shown signal groups (e.g., signal groups such as synchronization signals and reference signals) have similar properties in that they are orthogonal sequences (or quasi-orthogonal sequences) generated based on certain rules (e.g., both PSS and DMRS are based on the Zadoff-Chu sequence), and it is also considered to be redesigned for after 6G in a form that can be used interchangeably.

[0055] However, after 6G, the following communication methods are also envisioned: without going through the process of camping on a cell, but only reacquiring synchronization with the cell when communication is needed. In addition, it is considered that the terahertz band with a limited coverage area is envisioned to utilize not only the stand-alone (SA) provision but also the dual connection with the existing system (e.g., LTE / 4G / 5G).

[0056] In this case, it is also considered that the UE does not always camp on 6G (or a 6G cell), but only performs short-term operations using 6G (e.g., initial connection operation / demodulation operation, etc.) when needed. Alternatively, it is also considered that in the case of adopting the LBT method on the premise of sharing the terahertz band with other uses, operations are performed each time communication is carried out.

[0057] In addition, in the case of considering the utilization in URLLC etc. that requires low latency, it is necessary to reduce the initial access latency. However, if the signal group for initial access is continuously transmitted in a short cycle simply, the increase in network overhead becomes a problem. In addition, in 6G, a wireless link (e.g., OTA (Over The Air)) latency of less than 1 ms is also envisioned. If waiting for the synchronization signal of the existing system (e.g., the synchronization signal transmitted in a default 20 ms cycle in 5G) to find the cell, the latency becomes very large.

[0058] Therefore, it is expected to introduce / support a new signal (e.g., a signal that can be synchronously utilized) with small processing latency and low terminal load for the wireless communication method after 6G. Therefore, the inventors of the present invention focused on the fact that in the mobile NW that is developing towards multifunctionalization, diverse pilot signals (reference signals, synchronization signals, etc.) will still be needed in the future, and came up with reducing the resources required for the pilot signal as much as possible, and performing at least one of the synchronization process, demodulation process, and positioning process with low latency and low terminal load.

[0059] Therefore, as an example, the inventors of the present invention studied the synchronization signal / reference signal in the case of envisioning single-carrier transmission, and came up with one mode of the present embodiment (e.g., the first embodiment).

[0060] In addition, after 6G, it is also envisioned to be provided in a coexistence manner with the existing system (e.g., 4G / 5G). For example, it is also envisioned that in 6G, only extremely small cells are provided using the terahertz band, and a provision method similar to the non-standalone networking (NSA) of 5G is also considered.

[0061] In the scenario where 4G / 5G cells and 6G cells are synchronized, it is also envisaged to use the existing synchronization signals (SS) supported in 4G / 5G to provide functions related to time synchronization with 6G. In this case, it is also considered that part of the functions of the synchronization signal of 6G depends on 4G / 5G.

[0062] For example, it is also possible to consider a structure that simplifies operations on the 6G side by making frame numbers / cell IDs, etc. common among multiple communication systems (e.g., 4G / 5G / 6G). In this case, it is also envisaged that 6G does not define all synchronization signals.

[0063] In this way, in 6G, it is possible for base stations / terminals to be provided through hardware implementations different from existing radio access technologies (RATs). For example, part of the operations such as correction of the frequency offset of the terminal can also be set to be specific to 6G.

[0064] However, in the coexistence / synchronization scenario of cells in existing systems (e.g., 4G / 5G) and cells after 6G, the design / structure of signals (e.g., synchronization signals (SS), etc.) for specific operations (e.g., initial access operations) for 6G becomes a problem. In addition, after 6G, it is also envisaged that initial access is frequently performed. If the possibility of cell detection for 6G is considered in addition to 4G / 5G, it is necessary to reduce the detection load during initial access processing.

[0065] In addition, as another example, the inventors of the present invention focused on the coexistence / synchronization scenario of cells in existing systems (e.g., 4G / 5G) and cells after 6G, studied specific operations (e.g., initial access operations, etc.) in the system after 6G, and came up with one mode (e.g., the second mode) of the present embodiment.

[0066] Hereinafter, embodiments related to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods related to each embodiment can be applied separately or in combination.

[0067] In the present disclosure, "A / B" and "at least one of A and B" can also be rewritten with each other. In addition, in the present disclosure, "A / B / C" can also mean "at least one of A, B, and C".

[0068] In the present disclosure, notification, activation, deactivation, indication (or specify), selection, configuration, update, determination, etc. can also be rewritten with each other. In the present disclosure, support, control, be able to control, operation, be able to operate, etc. can also be rewritten with each other.

[0069] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, Information Elements (IEs), settings, etc. can also be rewritten with each other. In the present disclosure, Medium Access Control control elements (MAC Control Elements (MAC CEs)), update commands, activation / deactivation commands, etc. can also be rewritten with each other.

[0070] In the present disclosure, higher layer signaling can also be any one of, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0071] In the present disclosure, MAC signaling can also use, for example, MAC Control Elements (MAC CEs), MAC Protocol Data Units (MAC PDUs), etc. Broadcast information can also be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0072] In the present disclosure, physical layer signaling can also be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.

[0073] In the present disclosure, indexes, identifiers (IDs), indicators, resource IDs, etc. can also be rewritten with each other. In the present disclosure, sequences, lists, sets, groups, clusters, subsets, etc. can also be rewritten with each other.

[0074] In the present disclosure, a panel, a UE panel, a panel group, a beam, a beam group, a precoder, an uplink (Uplink (UL)) transmission entity, a transmission / reception point (Transmission / Reception Point (TRP)), a base station, spatial relation information (Spatial Relation Information (SRI)), a spatial relation, an SRS resource indicator (SRS Resource Indicator (SRI)), a control resource set (Control Resource Set (CORESET)), a physical downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a codeword (Codeword (CW)), a transport block (Transport Block (TB)), a reference signal (Reference Signal (RS)), an antenna port (e.g., a demodulation reference signal (DeModulation Reference Signal (DMRS)) port), an antenna port group (e.g., a DMRS port group), a group (e.g., a spatial relation group, a code division multiplexing (Code Division Multiplexing (CDM)) group, a reference signal group, a CORESET group, a physical uplink control channel (Physical Uplink Control Channel (PUCCH)) group, a PUCCH resource group), a resource (e.g., a reference signal resource, an SRS resource), a resource set (e.g., a reference signal resource set), a CORESET pool, a transmission configuration indication state (TCI state) for the downlink (DL TCI state), a TCI state for the uplink (UL TCI state), a unified TCI state, a common TCI state, a quasi-co-location (Quasi-Co-Location (QCL)), a QCL assumption, etc. may also be rewritten with each other.

[0075] In addition, an identifier (ID) of spatial relation information (TCI state ID) and spatial relation information (TCI state) may also be rewritten with each other. "Spatial relation information" may also be rewritten with "a set of spatial relation information", "one or more pieces of spatial relation information", etc. A TCI state and a TCI may also be rewritten with each other.

[0076] In the present disclosure, terms such as discard, abort, cancel, truncate, rate matching, postpone, not send, etc. can also be rewritten with each other.

[0077] (Wireless communication method)

[0078] The terminal / base station can also use at least one of the following first embodiment and second embodiment to control communication in a wireless communication system after 6G. The first embodiment and the second embodiment can be applied separately (for example, only support / apply one of them) or in combination (for example, support / apply both of them).

[0079] In addition, in the first embodiment / second embodiment, a specific 6G frame structure can also be applied.

[0080] As the 6G frame structure, it can also be set as follows: like 4G (e.g., LTE) or 5G, the network and the terminal are synchronized in time, share the time timing related to the symbol / frame structure and operate. When there is an error in the timing maintained by the network and the terminal, the error can also be absorbed / corrected by the CP length or the timing advance (TA), so that the network and the terminal operate synchronously.

[0081] Alternatively, for reducing power consumption or improving utilization efficiency in high frequencies, it can also support that the network and the terminal are not synchronized in time, and the network / terminal operates autonomously.

[0082] In a wireless communication system after 6G, a frame structure considering coexistence with existing systems (e.g., 4G / 5G) can also be applied. For example, in a wireless communication system after 6G, based on the frame structure of the existing system, the symbol length can also be defined / set to be short (refer to Figure 7 )). In Figure 7 , the case where for 1 symbol of the existing system, there correspond X symbols corresponding to 6G (or there are X symbols of 6G included in 1 symbol of the existing system) is shown. X can be either defined in the specification or set / indicated from the base station to the terminal through high-layer signaling / DCI.

[0083] In this embodiment, 4G / 5G is listed as an example of the existing system and a wireless communication system after 6G is listed as an example of the future wireless communication system for illustration, but the communication systems to which this embodiment can be applied are not limited to these. It can also be applied to other communication systems. In addition, the existing system (4G / 5G) can also be rewritten as the first wireless communication system or the first RAT. The future wireless communication system (6G) can also be rewritten as the second wireless communication system or the second RAT.

[0084] In addition, in the following description, the case of supporting / applying single-carrier transmission in the downlink is taken as an example for illustration, but the cases to which the present embodiment can be applied are not limited thereto. It can be applied to the case of supporting / applying single-carrier transmission in the uplink, or to other cases.

[0085] <First Embodiment>

[0086] In the first embodiment, an example of a new signal supported / introduced in a future wireless communication system (for example, after 6G) is described.

[0087] This new signal may also be referred to as a pilot signal (Pilot Signal (PS)), a 6G pilot signal, or a new signal group, a signal group for 6G, a synchronization / reference signal (SS / RS), or a 6G synchronization / reference signal, etc.

[0088] The new signal (hereinafter, also referred to as a pilot signal) may also be a signal generated based on a specific rule and generating different sequences according to the identification number of a cell (for example, cell ID). The specific rule may also be a specific sequence (for example, Zadoff-Chu sequence / M sequence, etc.).

[0089] The terminal may also receive a pilot signal generating a sequence based on the cell ID at least in the case of supporting single-carrier transmission in the downlink.

[0090] The pilot signal may also be a signal that does not notify information in an explicit method. In addition, like the cell ID notification based on a synchronization signal, one or more candidates may be specified in advance, and the terminal blindly detects the candidate, thereby implicitly obtaining information from the pilot signal.

[0091] The pilot signal may also have multiple features. Or, the pilot signal may combinatorially have the features of multiple signals in the existing system.

[0092] As an example, the pilot signal may also have at least one of the following Feature #1 (at least one of Feature #1-1 to #1-6), Feature #2 (Feature #2-1 to #2-3), Feature #3 (Feature #3-1 to #3-3), and Feature #4 (Feature #4-1 to #4-2), or a combination of two or more.

[0093] Feature #1 to #4 may also be the features possessed by specific signals in the existing system (see Figure 8). For example, Feature #1 can also be a feature of the synchronization signal (SS). In addition, Feature #2 can also be a feature of the resynchronization signal (RSS). In addition, Feature #3 can also be a feature of the demodulation reference signal (DMRS). Feature #4 can also be a feature of the positioning reference signal (Positioning RS). Of course, the signals corresponding to each feature are not limited to this.

[0094] [Feature #1]

[0095] · Feature #1-1: The terminal assumes an arbitrary transmission period, or another arbitrary period is set for the UE.

[0096] · Feature #1-2: Associate an arbitrary ID (e.g., the ID of the beam), and apply repeated transmission.

[0097] · Feature #1-3: Generate based on time positions such as symbol timing / system frame number (SFN) and information capable of determining the cell ID.

[0098] · Feature #1-4: Assume phased terminal processing and notify the cell ID through multiple signals.

[0099] · Feature #1-5: Not a signal dedicated to the terminal.

[0100] · Feature #1-6: The time / frequency position assumed by the terminal at the initial time point is fixed.

[0101] Feature #1 (e.g., at least one of Feature #1-1 to #1-6) can also be a feature of the synchronization signal (SS) utilized in the determination of the cell ID and the determination of the time / frequency position in the initial access process.

[0102] [Feature #2]

[0103] · Feature #2-1: Set as needed through MIB / SIB, etc.

[0104] · Feature #2-2: Set the transmission period / offset of the start time, and the length of the time of transmission.

[0105] · Feature #2-3: Set the offset of the transmission power.

[0106] Feature #2 (e.g., at least one of Feature #2-1 to #2-3) can also be a feature of the additional synchronization signal (RSS) utilized by the terminal to supplement the synchronization signal as early as possible.

[0107] [Feature #3]

[0108] · Feature #3-1: A signal dedicated to the terminal.

[0109] · Feature #3-2: Can set the density of the position / configuration in time,

[0110] · Feature #3-3: Transmit together with the transmission of associated data (non-leaving signal).

[0111] Feature #3 (e.g., at least one of Feature #3-1 to #3-3) can also be a feature of the demodulation reference signal (DMRS) associated with PBCH / PDSCH, etc., and utilized in the prior channel estimation for data demodulation.

[0112] [Feature #4]

[0113] · Feature #4-1: Not a terminal-specific signal,

[0114] · Feature #4-2: Can set the density of the position / configuration in time, etc.

[0115] Feature #4 (e.g., at least one of Feature #4-1 to #4-2) can also be a feature of the positioning reference signal (e.g., Positioning RS) utilized for providing high-precision position location via 5G.

[0116] The terminal can also control a specific operation / specific processing (e.g., at least one of synchronization processing, demodulation processing, and position location processing) based on at least a part of the sequence of pilot signals or at least a part of the resources corresponding to the pilot signals.

[0117] The pilot signal (or the sequence of pilot signals) can also apply at least one of the following Option 1-1 to Option 1-4.

[0118] [Option 1-1]

[0119] It can also be a feature that is a combination of all or part of Feature #1 (e.g., at least one of Feature #1-1 to #1-6) / Feature #2 (e.g., at least one of Feature #2-1 to #2-3) / Feature #3 (e.g., at least one of Feature #3-1 to #3-3) / Feature #4 (e.g., at least one of Feature #4-1 to #4-2) for all resources in the sequence of pilot signals (PS sequence). Or, it can also be a feature that is a combination of all or part of Feature #1 (e.g., at least one of Feature #1-1 to #1-6) / Feature #2 (e.g., at least one of Feature #2-1 to #2-3) / Feature #3 (e.g., at least one of Feature #3-1 to #3-3) / Feature #4 (e.g., at least one of Feature #4-1 to #4-2) for a part of the resources in the sequence of pilot signals (PS sequence).

[0120] Feature #1 to Feature #4 may also have different sequence generation methods / amount of resources to be mapped / periods / start offsets / transmission powers.

[0121] "Method 1-1-1"

[0122] For example, all of the sequence of the pilot signal may also be used as a synchronization signal and used as a specific reference signal (RS). That is, the synchronization signal and the reference signal may also have common features. In this case, the pilot signal used as the synchronization signal and the pilot signal used as the reference signal may also be derived by the same mechanism (e.g., the same mathematical formula).

[0123] The pilot signal may also be evenly mapped to the time domain at any period (refer to Figure 9A ). Figure 9A Fig. shows an example in the case where the pilot signal has a mode of being evenly time-mapped at any period. This pilot signal may also be used as a synchronization signal / a specific reference signal. The transmission conditions such as the period of the pilot signal may be defined in the specification or set for the terminal through a higher layer parameter.

[0124] Alternatively, the pilot signal may also be repeatedly transmitted for each beam (refer to Figure 9B ). For example, the pilot signals (or pilot signals with different indexes) applied with different beams may also be evenly mapped to the time domain at any period. The number of beams (or indexes of the pilot signals) may be predefined in the specification or notified from the base station to the terminal.

[0125] Alternatively, it may also be unevenly mapped to the time domain at any period (refer to Figure 9C ). Figure 9C Fig. shows an example in the case where the pilot signal has a mode of being unevenly time-mapped at any period. For example, the pilot signal mapped to a certain time domain (e.g., the first time length) may also be applied as a synchronization signal, and the pilot signal mapped to another time domain (e.g., the second time length) may also be applied as a reference signal.

[0126] "Method 1-1-2"

[0127] It may also be that all of the sequence of the pilot signal is applied as DMRS and a part of it is applied as a synchronization signal (SS).

[0128] In this case, the transmission conditions of the pilot signal used as the synchronization signal and the transmission conditions of the pilot signal used as the reference signal (non-synchronization signal) may also be independently set (or set differently).

[0129] For example, it can also be applied to the repeated transmission only in the synchronization signal (SS) (or only in the pilot signal used as the synchronization signal) (refer to Figure 10A ). That is, among the pilot signals, only a part of the time domain / frequency domain can be used as the synchronization signal, and this only part of the region has different conditions / characteristics from other regions (or resources). The different conditions / characteristics can also be at least one of repeated transmission, resource amount, transmission power, etc. In Figure 10A , the case where the repeated transmission is applied for each beam only when used as the synchronization signal is shown.

[0130] Alternatively, it can also be that only the DMRS (or only the pilot signal used as the DMRS) is transmitted from multiple antenna ports ( Figure 10B refer to). For example, it can also be transmitted from the first antenna port when the pilot signal is applied as the synchronization signal, and transmitted from the first antenna port and the second antenna port when the pilot signal is transmitted as the DMRS.

[0131] In addition, the number of antenna ports and the antenna port numbers are not limited to this. The number of antenna ports / antenna port numbers applied to the synchronization signal and the number of antenna ports / antenna port numbers applied to the DMRS can be defined in the specification respectively, or can be set through higher layer parameters.

[0132] At least one of the transmission conditions of the pilot signal used as the synchronization signal (such as transmission period / resource allocation / mapping mode, etc.) and the transmission conditions of the pilot signal used as the DMRS (such as transmission period / resource allocation / mapping mode, etc.) can be defined in the specification, or can be set / indicated from the base station to the terminal through higher layer signaling / DCI.

[0133] In addition, the pilot signal used as the synchronization signal and the pilot signal used as the reference signal (such as DMRS) can also be derived through different mechanisms (such as different mathematical expressions). Different mathematical expressions can also mean that some of the parameters included in the mathematical expression are different.

[0134] [Option 1-2]

[0135] Regarding the sequence of the pilot signal (such as the 6G RS sequence), it can also be that the mode of the time position of the configured resource is defined / stipulated in multiple ways, and at least one of the multiple modes (or candidates of the mode) is set / indicated to the terminal.

[0136] Figure 11 An example of multiple mapping modes of the pilot signal is shown. In Mode 1, an example of the pilot signal applying the same mapping mode at a specific period is shown. That is, each pilot signal has the same time domain (such as time length).

[0137] In Mode 2, a case is shown where a first time domain (e.g., a first time length) and a second time domain (e.g., a second time length) are applied to a pilot signal. Regarding which of Mode 1 and Mode 2 is to be applied, it can also be indicated / set from the base station to the terminal via higher layer signaling / DCI. Alternatively, based on the terminal capabilities, the terminal can also autonomously determine the applied mode.

[0138] In Figure 11 , two modes are shown, but it is not limited thereto. For example, modes with different transmission periods of the pilot signal can also be set. The number of modes and the mapping modes in the time domain / frequency domain of each mode are not limited thereto. The candidates for the modes can be defined in the specification or set from the base station to the terminal via higher layer signaling or the like.

[0139] In addition, the terminal can also be set with multiple modes. The terminal can also control the reception of the pilot signals corresponding to each mode based on the multiple set modes.

[0140] [Option 1-3]

[0141] Regarding the sequence of the pilot signal (e.g., 6G RS sequence), it can also be determined which of the above characteristics #1 to #4 is possessed according to the mapped time position, the combination of the time position and the frequency position, or the mode for determining the time position.

[0142] For example, the pilot signal configured in a specific frequency domain (e.g., the central region of the BWP / CC / communication band) can also have characteristic #1 / characteristic #2. The pilot signal configured in the same symbol / slot / frequency domain or adjacent symbol / slot / frequency domain as a specific channel (e.g., PDSCH / PUSCH) can also be utilized as characteristic #3. Or, the pilot signal with a specific mode transmitted at a certain period can also have characteristic #1 / characteristic #2 / characteristic #4.

[0143] [Option 1-4]

[0144] Regarding the pilot signal, the terminal can also assume a default setting. The default setting can also be at least one of Option 1-1 to Option 1-3, or at least one of characteristics #1 to #4. Alternatively, as the pilot signal, additional settings can also be notified to the terminal separately.

[0145] The base station can also set multiple pilot signals with different settings (or transmission conditions) to the terminal. The setting (or setting information) of the pilot signal can be set as cell-specific / BWP-specific. Or, the setting (or setting information) of the pilot signal can be set as terminal-specific.

[0146] For example, it is also possible to perform the setting of periodic pilot signals and the setting of additional pilot signals (refer to Figure 12 ). In Figure 12 , an example is shown in the case where a pilot signal (candidate position #1) to be transmitted periodically and an additional pilot signal (candidate position #2) are set. Candidate position #1 and candidate position #2 can be configured not to overlap, or as shown in Figure 12 , they can be configured to overlap.

[0147] Thus, an additional pilot signal can be configured in a certain time domain / frequency domain through the additional pilot signal. Thus, even in a case where a certain density is required, such as for a positioning reference signal (e.g., PRS, etc.), it is possible to set an additional pilot signal in the insufficient resources, thereby performing a more complex pilot signal setting.

[0148] In addition, when the positions of multiple pilot signals (e.g., candidate position #1 and candidate position #2) overlap, it is also possible to perform an AND / OR operation on the pilot signals of both to determine the configuration. Or, it is also possible to conceive of discarding / canceling the setting of one of the pilot signals, etc.

[0149] [Variation]

[0150] Options 1-1 to 1-4 are illustrated by taking DL single-carrier transmission as an example, but the applicable communication systems are not limited to this. For example, it can also be applied to UL (e.g., single-carrier transmission). Or, it can also be applied to multi-carrier transmission.

[0151] <Second Embodiment>

[0152] In the second embodiment, an example of the initial access operation in a future wireless communication system (e.g., after 6G) is described. The second embodiment can be applied independently of the first embodiment or in combination with the first embodiment.

[0153] In the following description, it is described by taking the case where a cell of an existing system (e.g., 4G / 5G) and a 6G cell coexist and are time-synchronized as an example, but the applicable situations of this embodiment are not limited to this.

[0154] When a 6G cell and a cell of an existing system coexist and are time-synchronized, it is also possible to define the 6G initial access operation in association with the synchronization signal / broadcast channel (e.g., SS / PBCH) of 4G / 5G. The synchronization signal / broadcast channel (e.g., SS / PBCH) can also be rewritten as a synchronization signal block (e.g., SS / PBCH block).

[0155] For example, the synchronization signal of 6G may also have at least one of the following functions #2-1 to #2-6 provided by the synchronization signal (SS) / physical broadcast channel (PBCH) of 4G / 5G. That is, for the following functions #2-1 to #2-6 provided by the SS / PBCH of 4G / 5G, it is not necessary to implement all of them in the SS / PBCH of 6G in the same way. Instead, on the premise that a part of them is provided in the SS / PBCH of 4G / 5G, any processing / notification of 6G may be omitted / ignored.

[0156] · Function #2-1: Time synchronization (e.g., detection of symbol boundary / determination of SFN)

[0157] · Function #2-2: Frequency synchronization (e.g., detection of subcarrier position)

[0158] · Function #2-3: Correction of frequency offset

[0159] · Function #2-4: Determination of cell ID

[0160] · Function #2-5: Notification of system information

[0161] · Function #2-6: Cell positioning

[0162] For example, for the information of a specific 6G cell, the terminal may also assume that the information is notified on the 4G / 5G side, or assume that the specific information is defined in an associated manner between 6G and 4G / 5G without the need for notification.

[0163] The terminal may also use at least one of the following options 2-1 to option 2-3 to control the initial access operation in a wireless communication system after 6G.

[0164] [Option 2-1]

[0165] The SS / PBCH of 4G / 5G and the SS / PBCH of 6G may be defined in an associated manner. Alternatively, the information explicitly or implicitly notified by the SS / PBCH of 4G / 5G and the information explicitly or implicitly notified by the SS / PBCH of 6G may be defined in an associated manner. Thus, in the initial access operation of 6G, operations related to at least one of functions #2-1 to function #2-6 (e.g., a part of the operations related to detection / estimation) may be omitted.

[0166] 《Method 2-1-1》

[0167] For the system information corresponding to 6G, it may also be notified to the terminal using an existing system (e.g., 4G / 5G). In this case, on the 6G cell side, on the premise that the system information is notified on the 5G side, the structure of the channel equivalent to the physical broadcast channel (PBCH) is not prepared / supported.

[0168] In this case, when the terminal performs an access operation for 6G (e.g., an initial access operation), control can also be performed based on information (e.g., SS / PBCH block) notified from other cells (e.g., 4G / 5G cells). Thereby, the reception process during the initial access operation for 6G can be simplified, and the broadcast channel corresponding to 6G can be omitted.

[0169] "Method 2-1-2"

[0170] The synchronization signal (SS) corresponding to 6G can also be configured as a structure that supports a one-stage SS. In this case, the 6G synchronization signal is, for example, envisioned for a specific function (e.g., detection of symbol boundaries, etc.). For the synchronization signals (types of PSS and SSS) provided in two stages on the 4G / 5G side, a one-stage synchronization signal (a type of SS) can also be provided on the 6G side (see Figure 13 ).

[0171] Figure 13 The following situation is shown: In the 5G system, the initial access operation is performed using a synchronization signal block that includes two synchronization signals (e.g., PSS and SSS) and PBCH. In the 6G system, the initial access operation is performed using one synchronization signal (SS) and PBCH. Additionally, in the initial access operation of the 6G system, only one synchronization signal (SS) can be used, and the reception of the broadcast channel (PBCH) can be omitted. In this case, for example, Method 2-1-1 can also be used.

[0172] "Method 2-1-3"

[0173] The cell ID of 6G can also be derived based on the cell ID of 4G / 5G. For example, the cell ID of 6G can be the same as the cell ID of 4G / 5G, or it can be an ID derived by applying specific information (e.g., an offset) to the cell ID of 4G / 5G. For example, the terminal can also assume that the cell ID of 6G is the same as the cell ID of 4G / 5G and omit the cell ID detection operation in the 6G synchronization signal.

[0174] Alternatively, it can be assumed that the cell ID of 6G is defined in association with the cell ID of 4G / 5G. A part of the cell ID of 6G is associated with the 4G / 5G synchronization signal, and the remaining cell ID of 6G is associated with the 6G synchronization signal. The terminal can also perform the initial access process (e.g., determination of the cell ID) in the 6G cell based on the 4G / 5G synchronization signal and the 6G synchronization signal.

[0175] [Option 2-2]

[0176] It can also be configured such that the SS / PBCH of 4G / 5G and the SS / PBCH of 6G are arranged at the same time / frequency positions. Alternatively, it can also be configured such that the SS / PBCH of 4G / 5G and the SS / PBCH of 6G are arranged at associated time / frequency positions.

[0177] The terminal can also be assumed to have the SS / PBCH of 6G arranged at the same time / frequency positions as the SS / PBCH of 4G / 5G, or arranged at time / frequency positions associated with the SS / PBCH of 4G / 5G.

[0178] In this case, at least one of the operations related to the determination of the time position such as the SFN on the 6G cell side, the operation related to the determination of the cell ID, and the operation related to the determination of the beam ID can also be omitted / simplified. Alternatively, other operations on the 6G cell side (e.g., the operation related to the determination of the frequency position) can also be omitted / simplified.

[0179] "Method 2-2-1"

[0180] The cell ID of the 5G synchronization signal (SS) transmitted at the same time position can also be the same as the cell ID of the 6G synchronization signal (SS). Alternatively, when the 5G synchronization signal (SS) and the 6G synchronization signal (SS) are transmitted at the same time position, the cell ID of 6G can also be determined based on the cell ID corresponding to the 5G synchronization signal.

[0181] The terminal can also be assumed that when the 5G SS and the 6G SS are transmitted at the same time position (or overlap in the time domain), the cell ID corresponding to the 5G SS is the same as the cell ID corresponding to the 6G SS. Alternatively, when the 5G SS and the 6G SS are transmitted at the same time position (or overlap in the time domain), the terminal can also determine the cell ID of 6G based on the cell ID of the 5G SS.

[0182] In this case, the start timing of the 5G SS and the start timing of the 6G SS can also be the same (see Figure 14 ). Figure 14 It shows the following situation: for the first SSB of 5G (e.g., SSB#0) and the second SSB of 5G (e.g., SSB#1), the signal groups corresponding to the SSB of 6G are respectively mapped to the same start timing (e.g., the same starting symbol). For example, X symbols corresponding to 6G can also be included in one OFDM symbol corresponding to 5G. In the signal group corresponding to the SSB of 6G, part or all of the notification of the cell ID can also be omitted.

[0183] Alternatively, the start timing of the 5G SS and the start timing of the 6G SS can also be set with a specific offset interval. The specific offset can either be defined in the specification or be notified separately from the base station to the terminal.

[0184] 《Method 2-2-2》

[0185] The cell ID of the 5G synchronization signal (SS) transmitted at the same time position can also be the same as the beam number of the 6G synchronization signal (SS). Alternatively, when the 5G synchronization signal (SS) and the 6G synchronization signal (SS) are transmitted at the same time position, the beam number (or reference signal index) corresponding to the 6G synchronization signal can also be determined based on the beam number (or reference signal index) corresponding to the 5G synchronization signal.

[0186] The terminal can also assume that when the 5G SS and the 6G SS are transmitted at the same time position (or overlap in the time domain), the beam number corresponding to the 5G SS is the same as the beam number corresponding to the 6G SS. Alternatively, when the 5G SS and the 6G SS are transmitted at the same time position (or overlap in the time domain), the terminal can also determine the beam number of the 6G SS based on the beam number of the 5G SS.

[0187] In this case, the start timing of the 5G SS and the start timing of the 6G SS can also be the same (see Figure 15 ). Figure 15 The following situation is shown: for the first SSB (e.g., SSB#0) and the second SSB (e.g., SSB#1) of 5G, the signal groups corresponding to the 6G SSB are respectively mapped to the same start timing (e.g., the same starting symbol). For example, X symbols corresponding to 6G can also be included in one OFDM symbol corresponding to 5G. In the signal group corresponding to the 6G SSB, the notification of a part or all of the beam ID can also be omitted.

[0188] Alternatively, the start timing of the 5G SS and the start timing of the 6G SS can also be set with a specific offset interval. The specific offset can either be defined in the specification or be notified separately from the base station to the terminal.

[0189] Method 2-2-2 can also be applied in combination with Method 2-2-1.

[0190] [Option 2-3]

[0191] An additional notification bit can also be set on the cell side of the existing 4G / 5G system, and this notification bit can be used to notify the terminal of at least one of the presence / absence of 6G, the cell prohibition flag, any channel utilization such as the synchronization signal (SS), and the mode of the process.

[0192] <Supplement>

[0193] [Notification of Information to UE]

[0194] Notification of any information from the network (Network (NW)) (e.g., base station (Base Station (BS))) to the UE (in other words, reception of any information from the BS in the UE) in the above-described embodiments may also be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0195] When the above notification is performed by MAC CE, the MAC CE may also be identified by being included in the MAC subheader with a new logical channel ID (Logical Channel ID (LCID)) not defined in the existing standard.

[0196] When the above notification is performed by DCI, the above notification may also be performed by a specific field of the DCI, a radio network temporary identifier (Radio Network Temporary Identifier (RNTI)) used in the scrambling of cyclic redundancy check (Cyclic Redundancy Check (CRC)) bits assigned to the DCI, the format of the DCI, etc.

[0197] In addition, notification of any information to the UE in the above-described embodiments may also be performed periodically, semi-persistently, or aperiodically.

[0198] [Notification of Information from UE]

[0199] Notification of any information from the UE (to the NW) (in other words, transmission / reporting of any information from the UE to the BS) in the above-described embodiments may also be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0200] When the above notification is performed by MAC CE, the MAC CE may also be identified by being included in the MAC subheader with a new LCID not defined in the existing standard.

[0201] In the case where the above notification is carried out by the UCI, the above notification can also be sent using the PUCCH or PUSCH.

[0202] In addition, the notification of any information from the UE in the above embodiments can also be carried out periodically, semi-persistently, or aperiodically.

[0203] [Regarding the application of each embodiment]

[0204] At least one of the above embodiments can also be applied when specific conditions are met. The specific conditions can be specified in the standard or can be notified to the UE / BS using higher layer signaling / physical layer signaling.

[0205] At least one of the above embodiments can also be applied only to UEs that have reported a specific UE capability or support the specific UE capability.

[0206] The specific UE capability can also represent at least one of the following:

[0207] · Support for specific processing / operations / control / information for at least one of the above embodiments,

[0208] · Support for single-carrier transmission in the downlink,

[0209] · Support for pilot signals (e.g., pilot signals for 6G systems),

[0210] · Support for connection to both 4G / 5G (e.g., prior to Rel.17) and 6G (e.g., dual connection),

[0211] · Support for symbol lengths for 6G.

[0212] In addition, the specific UE capability can be a capability that is applied across all frequencies (commonly regardless of frequency), or a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or a capability for each feature set (Feature Set (FS)) or a feature set per component carrier (FeatureSet Per Component-carrier (FSPC)).

[0213] In addition, the above-mentioned specific UE capabilities can be either capabilities that are applied across all duplex modes (commonly regardless of the duplex mode) or capabilities for each duplex mode (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0214] In addition, at least one of the above-mentioned embodiments can also be applied when the UE is set / activated / triggered by high-layer signaling / physical-layer signaling with specific information associated with the above-mentioned embodiments (or when operating the above-mentioned embodiments). For example, the specific information can also be information indicating the activation of a specific operation based on a pilot signal, any RRC parameters for a specific RAT (e.g., 6G) / version (e.g., Rel.18 / 19 / 20), etc.

[0215] The UE can also, for example, apply the operations of Rel.15 / 16 when it does not support at least one of the above-mentioned specific UE capabilities or has not been set with the above-mentioned specific information.

[0216] (Supplementary Note)

[0217] Regarding an embodiment of the present disclosure, the following inventions are noted.

[0218] [Supplementary Note 1-1]

[0219] A terminal, comprising: a receiving unit that receives a pilot signal generating a sequence based on a cell identification number; and a control unit that controls synchronization processing, demodulation processing, and position location processing based on at least a part of the sequence of the pilot signal or at least a part of the resource corresponding to the pilot signal.

[0220] [Supplementary Note 1-2]

[0221] The terminal according to Supplementary Note 1-1, wherein the entire sequence of the pilot signal is used as a demodulation reference signal, and the entire or a part of the sequence of the pilot signal is used as a synchronization signal.

[0222] [Supplementary Note 1-3]

[0223] The terminal according to Supplementary Note 1-1 or Supplementary Note 1-2, wherein a plurality of candidates for the time position of the resource configured to correspond to the pilot signal are defined or set.

[0224] [Supplementary Note 1-4]

[0225] A terminal as described in any one of Supplementary Notes 1-1 to 1-3, wherein the control unit performs at least one of the synchronization process, the demodulation process, and the position location process based on at least one of the time position and the frequency position of the sequence to which the pilot signal is mapped.

[0226] [Supplementary Note 2-1]

[0227] A terminal having: a receiving unit that receives a synchronization signal / physical broadcast channel (SS / PBCH) block including a first synchronization signal, a second synchronization signal, and a physical broadcast channel in a first wireless communication system, and receives a signal group for the second wireless communication system in the second wireless communication system; and a control unit that controls at least one of the synchronization process, the frequency offset correction, the specification of the cell ID, the acquisition of system information, and the cell location in the second wireless communication system based on both the SS / PBCH block and the signal group.

[0228] [Supplementary Note 2-2]

[0229] The terminal as described in Supplementary Note 2-1, wherein the signal group does not include at least one of the first synchronization signal, the second synchronization signal, and the physical broadcast channel.

[0230] [Supplementary Note 2-3]

[0231] The terminal as described in Supplementary Note 2-1 or Supplementary Note 2-2, wherein the control unit determines at least one of the cell ID, the beam ID, and the frame number corresponding to the second wireless communication system based on the relationship between the time positions of the SS / PBCH block and the signal group.

[0232] [Supplementary Note 2-4]

[0233] The terminal as described in any one of Supplementary Notes 2-1 to 2-3, wherein, in a case where one symbol supported in the first wireless communication system includes a plurality of symbols supported in the second wireless communication system, a plurality of SS / PBCH blocks and a plurality of signal groups are mapped in a manner of overlapping each other in the time domain.

[0234] (Wireless communication system)

[0235] Hereinafter, the structure of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof is used for communication.

[0236] Figure 16This is a diagram showing an example of the schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 (which may also be simply referred to as system 1) may also be a system that realizes communication by using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the 5th generation mobile communication system New Radio (5G NR), and the like.

[0237] In addition, the wireless communication system 1 may also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0238] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0239] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both the MN and the SN are base stations (gNBs) of NR (NR-NR Dual Connectivity (NN-DC))).

[0240] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a - 12c) that is disposed within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration, number, etc. of each cell and the user terminal 20 are not limited to the manner shown in the figure. Hereinafter, without distinguishing between the base stations 11 and 12, they are collectively referred to as the base station 10.

[0241] The user terminal 20 may also be connected to at least one of the multiple base stations 10. The user terminal 20 may also utilize at least one of carrier aggregation (CA) and dual connectivity (DC) that uses multiple component carriers (CCs).

[0242] Each CC may also be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub - 6 GHz), and FR2 may be a frequency band higher than 24 GHz (above - 24 GHz). Additionally, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these. For example, FR1 may correspond to a frequency band higher than FR2.

[0243] Furthermore, the user terminal 20 may also communicate in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0244] The multiple base stations 10 may also be connected by wire (e.g., optical fiber based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11, which is equivalent to the upper - level station, may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12, which is equivalent to a relay station (relay), may also be referred to as an IAB node.

[0245] The base station 10 can also be connected to the core network 30 via other base stations 10 or directly. For example, the core network 30 can also include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.

[0246] For example, the core network 30 can also include network functions (NF) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Maintenance Operations Administration and Maintenance (Management) (OAM). Additionally, multiple functions can be provided by one network node. Furthermore, communication with an external network (e.g., the Internet) can be performed via the DN.

[0247] The user terminal 20 can also be a terminal that supports at least one of communication methods such as LTE, LTE-A, 5G, etc.

[0248] In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the Downlink (DL) and the Uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. can also be used.

[0249] The wireless access method can also be referred to as a waveform. Additionally, in the wireless communication system 1, in the wireless access methods of the UL and the DL, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used.

[0250] In the wireless communication system 1, as the downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. that are shared among the user terminals 20 can also be used.

[0251] Furthermore, in the wireless communication system 1, as the uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. that are shared among the user terminals 20 can also be used.

[0252] Through the PDSCH, user data, high-layer control information, System Information Block (SIB), etc. are transmitted. Through the PUSCH, user data, high-layer control information, etc. can also be transmitted. In addition, through the PBCH, the Master Information Block (MIB) can also be transmitted.

[0253] Through the PDCCH, low-layer control information can also be transmitted. The low-layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)), and the downlink control information includes scheduling information for at least one of the PDSCH and the PUSCH.

[0254] In addition, the DCI that schedules the PDSCH can also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH can also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH can also be rewritten as DL data, and the PUSCH can also be rewritten as UL data.

[0255] In the detection of the PDCCH, the Control Resource SET (CORESET) and the search space can also be used. The CORESET corresponds to the resource for searching for DCI. The search space corresponds to the search area and search method for PDCCH candidates. One CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a certain search space based on the search space setting.

[0256] One search space can also correspond to PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. in the present disclosure can also be rewritten with each other.

[0257] Through the PUCCH, it is also possible to transmit uplink control information (Uplink Control Information (UCI)) including at least one of channel state information (Channel State Information (CSI)), delivery confirmation information (e.g., which can also be referred to as Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)). Through the PRACH, it is also possible to transmit a random access preamble for establishing a connection with a cell.

[0258] In addition, in the present disclosure, the downlink, uplink, etc. can also be expressed without the word "link". Furthermore, it is also possible to express the beginning of various channels without the word "Physical".

[0259] In the wireless communication system 1, it is also possible to transmit a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. In the wireless communication system 1, as the DL-RS, it is also possible to transmit a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc.

[0260] The synchronization signal can, for example, also be at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. can also be referred to as reference signals.

[0261] In addition, in the wireless communication system 1, as the uplink reference signal (Uplink Reference Signal (UL-RS)), it is also possible to transmit a reference signal for measurement (sounding reference signal (Sounding Reference Signal (SRS))), a demodulation reference signal (DMRS), etc. In addition, DMRS can also be referred to as a user terminal specific reference signal (UE-specific Reference Signal).

[0262] (Base station)

[0263] Figure 17 FIG. is an example showing the structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. In addition, one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 may be provided respectively.

[0264] In addition, in this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it can be assumed that the base station 10 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0265] The control unit 110 implements overall control of the base station 10. The control unit 110 can be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0266] The control unit 110 may also control the generation, scheduling (e.g., resource allocation, mapping), etc. of signals. The control unit 110 may also control transmission / reception, measurement, etc. using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, a sequence, etc. to be transmitted as signals, and forward them to the transmission / reception unit 120. The control unit 110 may also perform call processing (setting, releasing, etc.) of communication channels, state management of the base station 10, management of radio resources, etc.

[0267] The transmission and reception unit 120 may also include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission and reception unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission and reception circuit, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0268] The transmission and reception unit 120 may be configured as an integrated transmission and reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may also be composed of a transmission processing unit 1211 and an RF unit 122. The reception unit may also be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0269] The transmission and reception antenna 130 may be composed of an antenna described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0270] The transmission and reception unit 120 may also transmit the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission and reception unit 120 may also receive the above-mentioned uplink channels, uplink reference signals, etc.

[0271] The transmission and reception unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmission beam and a reception beam.

[0272] The transmission and reception unit 120 (transmission processing unit 1211) may, for example, also perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0273] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing (filtering), Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0274] The transmission / reception unit 120 (RF unit 122) can also perform modulation to the radio frequency band, filter processing, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 130.

[0275] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filter processing, demodulation to the baseband signal, etc. on the radio frequency band signal received through the transmission / reception antenna 130.

[0276] The transmission / reception unit 120 (reception processing unit 1212) can also perform reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, etc. on the obtained baseband signal, and obtain user data, etc.

[0277] The transmission / reception unit 120 (measurement unit 123) may also perform measurements related to the received signal. For example, the measurement unit 123 may also perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may also perform measurements on received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0278] The transmission path interface 140 may also transmit and receive signals (backhaul signaling) between the device included in the core network 30 (e.g., the network node providing the NF), other base stations 10, etc., and may also obtain, transmit, etc. user data (user plane data), control plane data, etc. for the user terminal 20.

[0279] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0280] The transmission / reception unit 120 may also transmit a pilot signal that generates a sequence based on the cell identification number to the terminal. The control unit 110 may also control which of the synchronization process, the demodulation process, and the position location process in the terminal the pilot signal is used for through at least a part of the sequence of the pilot signal or at least a part of the resource corresponding to the pilot signal.

[0281] The transmission / reception unit 120 may also transmit a group of signals for the second radio communication system in the second radio communication system to a terminal connected to a first radio communication system that transmits a synchronization signal / physical broadcast channel (SS / PBCH) block including a first synchronization signal, a second synchronization signal, and a physical broadcast channel. The control unit 110 may also perform control to transmit the group of signals in a resource associated with a resource corresponding to a specific SS / PBCH block. It is sufficient that the group of signals includes one or more signals (for example, at least a synchronization signal).

[0282] (User Terminal)

[0283] Figure 18 FIG. is an example showing the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided respectively.

[0284] In addition, in this example, mainly the functional blocks of the characteristic parts in this embodiment are shown, and it can be assumed that the user terminal 20 also has other functional blocks required for wireless communication. A part of the processing of each unit described below may also be omitted.

[0285] The control unit 210 implements overall control of the user terminal 20. The control unit 210 may be composed of a controller, a control circuit, etc. that can be explained based on the common knowledge in the technical field related to the present disclosure.

[0286] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission / reception unit 220.

[0287] The transmission / reception unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transmission / reception unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. that can be explained based on the common knowledge in the technical field related to the present disclosure.

[0288] The transmission / reception unit 220 can be configured as an integrated transmission / reception unit, or can be composed of a transmission unit and a reception unit. The transmission unit can also be composed of a transmission processing unit 2211 and an RF unit 222. The reception unit can also be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0289] The transmission / reception antenna 230 can be composed of an antenna that can be described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0290] The transmission / reception unit 220 can also receive the above-mentioned downlink channels, synchronization signals, downlink reference signals, etc. The transmission / reception unit 220 can also transmit the above-mentioned uplink channels, uplink reference signals, etc.

[0291] The transmission / reception unit 220 can also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of a transmission beam and a reception beam.

[0292] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, for example, PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0293] The transmission / reception unit 220 (transmission processing unit 2211) can also perform transmission processing such as channel coding (which can include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0294] In addition, regarding whether to apply DFT processing, it can also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is effective (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using the DFT-s-OFDM waveform. In other cases, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-mentioned transmission processing.

[0295] The transmission / reception unit 220 (RF unit 222) can also perform modulation to the radio frequency band, filter processing, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 230.

[0296] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform amplification, filtering, demodulation to a baseband signal, etc. on a signal in a radio frequency band received through the transmission / reception antenna 230.

[0297] The transmission / reception unit 220 (reception processing unit 2212) can also perform reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing on the obtained baseband signal, and obtain user data, etc.

[0298] The transmission / reception unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), reception quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0299] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0300] The transmission / reception unit 220 can also receive a pilot signal that generates a sequence based on a cell identification number. The control unit 210 can also control synchronization processing, demodulation processing, and position location processing based on at least a part of the sequence of the pilot signal or at least a part of the resource corresponding to the pilot signal.

[0301] All of the sequence of the pilot signal can also be used as a demodulation reference signal, and all or a part of the sequence of the pilot signal can also be used as a synchronization signal. A plurality of candidates for the time position of the resource configured to correspond to the pilot signal can also be defined or set. The control unit 210 can also perform control to perform at least one of synchronization processing, demodulation processing, and position location processing based on at least one of the time position and the frequency position of the sequence of the mapped pilot signal.

[0302] The transmission / reception unit 220 may also receive a synchronization signal / physical broadcast channel (SS / PBCH) block including a first synchronization signal (e.g., PSS), a second synchronization signal (e.g., SSS), and a physical broadcast channel in the first wireless communication system, and receive a signal group for the second wireless communication system in the second wireless communication system. The control unit 210 may also control at least one of synchronization processing, frequency offset correction, cell ID specification, system information acquisition, and cell positioning in the second wireless communication system based on both the SS / PBCH block and the signal group.

[0303] The signal group is a structure that does not include at least one of the first synchronization signal, the second synchronization signal, and the physical broadcast channel. Alternatively, the signal group may also be a structure that includes one synchronization signal instead of including two synchronization signals as in the existing system.

[0304] The control unit 210 may also determine at least one of a cell ID, a beam ID, and a frame number corresponding to the second wireless communication system based on the relationship between the time positions of the SS / PBCH block and the signal group. In the case where one symbol supported in the first wireless communication system includes multiple symbols supported in the second wireless communication system, the multiple SS / PBCH blocks and the multiple signal groups are mapped in a manner that they overlap with each other in the time domain.

[0305] (Hardware Structure)

[0306] In addition, the block diagrams used in the description of the above embodiments illustrate blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. Furthermore, the implementation method of each functional block is not particularly limited. That is, each functional block may be implemented by a single device physically or logically combined, or may be implemented by two or more physically or logically separated devices directly or indirectly (e.g., by wire, wireless, etc.) connected, using these multiple devices. The functional block may also be implemented by combining the above single device or the above multiple devices with software.

[0307] Here, in terms of functions, there are judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuration (setting), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment, etc., but not limited to these. For example, a functional block (structural unit) that implements the transmission function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0308] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 19 FIG. is an example showing the hardware structure of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may physically be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0309] In addition, in the present disclosure, terms such as device, circuit, equipment, section, unit, etc. can be rewritten with each other. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some devices.

[0310] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be executed by one processor, or may be executed by two or more processors simultaneously, sequentially, or by other means. In addition, the processor 1001 may also be implemented by one or more chips.

[0311] Regarding each function in the base station 10 and the user terminal 20, for example, by reading a specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs operations and controls the communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003, thereby realizing it.

[0312] The processor 1001, for example, operates the operating system to control the entire computer. The processor 1001 may also be composed of a central processing unit (Central Processing Unit (CPU)) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, at least a part of the above control unit 110 (210), transmission / reception unit 120 (220), etc. may also be implemented by the processor 1001.

[0313] In addition, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes based on them. As the program, a program that causes the computer to execute at least a part of the operations described in the above embodiments can be used. For example, the control unit 110 (210) may also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and the same can be applied to other functional blocks.

[0314] The memory 1002 may also be a computer-readable recording medium, and may be composed of, for example, at least one of a read-only memory (Read Only Memory (ROM)), an erasable programmable read-only memory (Erasable Programmable ROM (EPROM)), an electrically erasable programmable read-only memory (Electrically EPROM (EEPROM)), a random access memory (Random Access Memory (RAM)), and other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0315] The storage 1003 may also be a computer-readable recording medium, and may be composed of, for example, at least one of a flexible disc, a floppy (registered trademark) disc, an optical disc (such as a compact disc (Compact Disc ROM (CD-ROM))), a digital versatile disc, a Blu-ray (registered trademark) disc, a removable disc, a hard disk drive, a smart card, a flash device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, and other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0316] The communication device 1004 is hardware (a transmitting and receiving device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-described transmitting and receiving unit 120 (220), transmitting and receiving antenna 130 (230), etc. may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be physically or logically separated and implemented by a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0317] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also have an integrated structure (for example, a touch panel).

[0318] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be constituted by a single bus or may be constituted by different buses between the respective devices.

[0319] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), etc., and part or all of each functional block may also be implemented by this hardware. For example, the processor 1001 may also be implemented using at least one of these hardwares.

[0320] (Modification example)

[0321] In addition, the terms described in this disclosure and the terms necessary for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may also be rewritten with each other. In addition, a signal may also be a message. A reference signal can also be abbreviated as RS and may also be referred to as a pilot, a pilot signal, etc. according to the applied standard. In addition, a component carrier (Component Carrier (CC)) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0322] A radio frame may also be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) independent of the numerology.

[0323] Here, the numerology may also be a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the numerology may also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transmitter-receiver in the frequency domain, a specific windowing process performed by a transmitter-receiver in the time domain, etc.

[0324] A time slot may also be composed of one or more symbols (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access (SC-FDMA)) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on the numerology.

[0325] A time slot may also include a plurality of mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0326] A radio frame, subframe, time slot, mini-slot, and symbol all represent time units for transmitting signals. A radio frame, subframe, time slot, mini-slot, and symbol may also use their respective other names. In addition, time units such as frames, subframes, time slots, mini-slots, and symbols in this disclosure can also be rewritten with each other.

[0327] For example, a subframe can also be referred to as a TTI, multiple consecutive subframes can also be referred to as a TTI, a time slot or a mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, can also be a period shorter than 1 ms (e.g., 1 - 13 symbols), or can also be a period longer than 1 ms. In addition, the unit representing a TTI may not be referred to as a subframe, but as a time slot, mini-slot, etc.

[0328] Here, a TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in units of TTI for each user terminal. In addition, the definition of a TTI is not limited to this.

[0329] A TTI can also be a transmission time unit for data packets (transport blocks), code blocks, codewords, etc. that have undergone channel coding, and can also become a processing unit for scheduling, link adaptation, etc. In addition, when a TTI is given, the time interval (e.g., the number of symbols) actually mapped with a transport block, code block, codeword, etc. can also be shorter than the TTI.

[0330] In addition, when a time slot or a mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) can also become the minimum time unit for scheduling. In addition, the number of time slots (mini-slot numbers) constituting the minimum time unit of this scheduling can also be controlled.

[0331] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8 - 12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI, shortened subframe, short subframe, mini-slot, sub-time slot, time slot, etc.

[0332] In addition, a long TTI (e.g., a normal TTI, subframe, etc.) can also be rewritten as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be rewritten as a TTI having a TTI length less than that of the long TTI and not less than 1 ms.

[0333] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may also be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0334] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a time slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks respectively.

[0335] In addition, one or more RBs may also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0336] In addition, a resource block may also be composed of one or more resource elements (REs). For example, one RE may also be a radio resource area of a subcarrier and a symbol.

[0337] A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) may also represent a subset of consecutive common RBs (common resource blocks) used for a certain parameter set in a certain carrier. Here, the common RBs may also be determined by the index of the RBs based on the common reference point of the carrier. A PRB may also be defined in a certain BWP and numbered additionally within that BWP.

[0338] A UL BWP (BWP for UL) and a DL BWP (BWP for DL) may also be included in a BWP. For a UE, one or more BWPs may also be set within one carrier.

[0339] At least one of the set BWPs may also be active, and the UE may not assume to transmit and receive specific signals / channels outside the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0340] In addition, structures such as the above-mentioned radio frames, subframes, time slots, mini time slots, and symbols are merely illustrative. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini time slots included in a time slot, the symbols included in a time slot or mini time slot, the number of RBs, the number of subcarriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be changed in various ways.

[0341] In addition, the information, parameters, etc. described in this disclosure can be represented by absolute values, relative values with respect to a specific value, or can also be represented by corresponding other information. For example, radio resources can also be indicated by a specific index.

[0342] In this disclosure, the names used for parameters, etc. are not restrictive names in all aspects. Furthermore, mathematical formulas, etc. using these parameters can also be different from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name. Therefore, the various names assigned to these various channels and information elements are not restrictive names in all aspects.

[0343] The information, signals, etc. described in this disclosure can also be represented using any one of various different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0344] In addition, information, signals, etc. can be output in at least one of the following directions: from a higher layer to a lower layer, and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0345] The input and output information, signals, etc. can be stored in a specific location (e.g., a memory), or can be managed using a management table. The input and output information, signals, etc. can be overwritten, updated, or appended. The output information, signals, etc. can also be deleted. The input information, signals, etc. can also be sent to other devices.

[0346] The notification of information is not limited to the manners / embodiments described in the present disclosure, and other methods can also be used. For example, the notification of information in the present disclosure can also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0347] In addition, physical layer signaling can also be referred to as layer 1 / layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling can also be referred to as an RRC message, and can also be, for example, an RRC connection setup message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling can also be notified, for example, using a MAC control element (MAC Control Element (CE)).

[0348] In addition, the notification of specific information (e.g., the notification of "is X") is not limited to explicit notification, and can also be performed implicitly (e.g., by not performing the notification of the specific information, or by the notification of other information).

[0349] The determination can be made by a value represented by one bit (0 or 1), can also be made by a true / false value (boolean value) represented by true or false, and can also be made by a numerical comparison (e.g., comparison with a specific value).

[0350] Software, whether referred to as software, firmware, middleware, micro-code, hardware description language, or by any other name, should be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0351] In addition, software, instructions, information, etc. can also be sent and received via a transmission medium. For example, in the case of sending software from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included in the definition of the transmission medium.

[0352] Terms such as "system" and "network" used in this disclosure can be used interchangeably. "Network" can also mean a device (e.g., a base station) included in the network.

[0353] In this disclosure, terms such as "precoding", "precoder", "weights (precoding weights)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. can be used interchangeably.

[0354] In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0355] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, and each of these smaller areas can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to part or all of the coverage area of at least one of the base station and the base station subsystem that provides communication services within this coverage range.

[0356] In the present disclosure, the base station sending information to the terminal can also be rewritten as the base station instructing the terminal to perform control / operation based on this information.

[0357] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "user device (User Equipment (UE))", "terminal" can be used interchangeably.

[0358] There are also cases where mobile stations are referred to by terms such as subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other appropriate terms.

[0359] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can be a device mounted on a moving object, the moving object itself, etc.

[0360] The mobile object refers to an object that can move, with an arbitrary moving speed, and of course includes the case where the mobile object stops. The mobile object includes, for example, vehicles, transport vehicles, automobiles, two-wheel motor vehicles (motorcycle), bicycles, connected vehicles, loading shovels, bulldozers, wheel loaders, dump trucks, fork lifts, trains, buses, trolleys, rickshaws, ships (boats and other watercraft), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quad-rotor aircraft, balloons, and objects mounted on them. In addition, it is not limited to these. Further, the mobile object may also be a mobile object that autonomously travels based on an operation instruction.

[0361] The mobile object can be either a means of transportation (e.g., vehicles, airplanes, etc.), or a mobile object that moves in an unmanned manner (e.g., drones, autonomous vehicles, etc.), or a robot (humanoid or non-humanoid). Additionally, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0362] Figure 20 FIG. is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotational speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0363] The drive unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also referred to as a handlebar), and based on the operation of the steering wheel operated by the user, steer at least one of the front wheels 46 and the rear wheels 47.

[0364] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63. Signals from various sensors 50 - 58 provided in the vehicle are input into the electronic control unit 49. The electronic control unit 49 may also be referred to as an ECU (Electronic Control Unit).

[0365] As signals from various sensors 50 - 58, there are a current signal from a current sensor 50 that senses the current of the motor, a rotational speed signal of the front wheels 46 / rear wheels 47 obtained by a rotational speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58, and so on.

[0366] The information service unit 59 is composed of various devices such as a vehicle navigation system, an audio system, a speaker, a display, a television, and a radio, which are used to provide (output) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 59 uses the information obtained from an external device via a communication module 60, etc., to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0367] The information service unit 59 may include an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accepts input from the outside, or may include an output device (e.g., a display, a speaker, an LED light, a touch panel, etc.) that performs output to the outside.

[0368] The driving assistance system unit 64 is composed of a millimeter-wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioning device (e.g., a Global Navigation Satellite System (GNSS), etc.), map information (e.g., a high-precision (High Definition (HD)) map, an Autonomous Vehicle (AV) map, etc.), a gyroscope system (e.g., an inertial measurement device (Inertial Measurement Unit (IMU)), an inertial navigation device (Inertial Navigation System (INS)), etc.), an Artificial Intelligence (AI) chip, an AI processor, and various devices for providing functions to prevent accidents in advance or reduce the driver's driving load, and one or more ECUs for controlling these devices. In addition, the driving assistance system unit 64 transmits and receives various information via the communication module 60 and realizes the driving assistance function or the autonomous driving function.

[0369] The communication module 60 can communicate with the microprocessor 61 and the components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 among the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50 - 58 provided in the vehicle 40.

[0370] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, various information is transmitted and received via wireless communication between external devices. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, the user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and the user terminal 20 (and can also function as at least one of the base station 10 and the user terminal 20).

[0371] The communication module 60 can also transmit, via wireless communication, at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, the information obtained based on the signals, and the information based on the input from the outside (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. can also be referred to as input units that accept input. For example, the PUSCH transmitted through the communication module 60 may also include the information based on the above input.

[0372] The communication module 60 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) transmitted from an external device and displays it to the information service unit 59 provided in the vehicle. The information service unit 59 can also be referred to as an output unit that outputs information (for example, based on the PDSCH received through the communication module 60 (or the data / information decoded from the PDSCH), outputs information to devices such as a display and a speaker).

[0373] In addition, the communication module 60 stores the various information received from the external device in the memory 62 that can be utilized by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, the direction control unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc. provided in the vehicle 40 based on the information stored in the memory 62.

[0374] In addition, the base station in the present disclosure can also be rewritten as a user terminal. For example, for a structure in which the communication between the base station and the user terminal is replaced with the communication between multiple user terminals (for example, it can also be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), the various modes / embodiments of the present disclosure can also be applied. In this case, it can also be a structure in which the user terminal 20 has the functions of the above base station 10. In addition, terms such as "uplink" and "downlink" can also be rewritten as terms corresponding to the communication between terminals (for example, "sidelink"). For example, the uplink channel, the downlink channel, etc. can also be rewritten as the sidelink channel.

[0375] Similarly, the user terminal in the present disclosure can also be rewritten as a base station. In this case, it can also be a structure in which the base station 10 has the functions of the above user terminal 20.

[0376] In the present disclosure, the operations assumed to be performed by the base station may sometimes be performed by its upper node according to circumstances. Apparently, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0377] Each mode / embodiment described in the present disclosure may be used alone, in combination, or switched during execution. In addition, the processing procedures, sequences, flowcharts, etc. of each mode / embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, for the methods described in the present disclosure, the elements of various steps are presented in the illustrated order, but are not limited to the specific order presented.

[0378] Each mode / embodiment described in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the 4th generation mobile communication system (4G), the 5th generation mobile communication system (5G), the 6th generation mobile communication system (6G), the xth generation mobile communication system (xG (where x is an integer or a decimal, for example)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, next-generation systems obtained by enhancing, modifying, fabricating, or prescribing them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G, etc.) for application.

[0379] The description "based on" used in the present disclosure, unless otherwise specified, does not mean "only based on". In other words, the description "based on" means both "only based on" and "at least based on".

[0380] Any reference to an element using designations such as "first", "second", etc. used in this disclosure does not fully define the quantity or order of these elements. These designations can be used in this disclosure as a convenient method for distinguishing between more than two elements. Therefore, the reference to the first and second elements does not mean that only two elements can be employed, or that the first element must in some form take precedence over the second element.

[0381] The term "determining" as used in this disclosure encompasses diverse actions in some cases. For example, "determining" can also be a case where judging, calculating, computing, processing, deriving, investigating, looking up (searching, inquiring) (such as searching in a table, database, or other data structure), ascertaining, etc. are regarded as performing "determining".

[0382] In addition, "determining" can also be a case where receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, accessing (e.g., accessing data in a memory), etc. are regarded as performing "determining".

[0383] In addition, "determining" can also be a case where resolving, selecting, choosing, establishing, comparing, etc. are regarded as performing "determining". That is, "determining" can also be a case where some actions are regarded as performing "determining".

[0384] In addition, "determining" can also be rewritten as "assuming", "expecting", "considering", etc.

[0385] The "maximum transmit power" described in this disclosure can either mean the maximum value of the transmit power, or the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0386] As used in this disclosure, the terms "connected" and "coupled", or any variations thereof, refer to all direct or indirect connections or couplings between two or more elements, and can include the situation where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can also be rewritten as "access".

[0387] In this disclosure, when two elements are connected, it is possible to consider that they are "connected" or "coupled" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, using electromagnetic energy with wavelengths in the radio frequency domain, microwave region, and optical (both visible and invisible) regions, etc.

[0388] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other". Additionally, this term can also mean "A and B are each different from C". Terms such as "separated" and "coupled" can also be interpreted in the same way as "different".

[0389] When the terms "include", "including", and their variations are used in this disclosure, these terms, like the term "comprising", are meant in an inclusive sense. Further, the term "or" used in this disclosure does not mean the exclusive or.

[0390] In this disclosure, for example, when articles are added through translation such as a, an, and the in English, this disclosure can also include the case where the nouns following these articles are in the plural form.

[0391] In this disclosure, "below", "less than", "above", "more than", "equal to", etc. can also be rewritten with each other. In addition, in this disclosure, statements meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. can also be rewritten with each other without being limited to the positive, comparative, and superlative degrees. Further, in this disclosure, statements meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. can also be rewritten as expressions with "the i-th" (where i is an arbitrary integer) attached without being limited to the positive, comparative, and superlative degrees (for example, "highest" can also be rewritten with "the i-th highest").

[0392] In the present disclosure, terms such as "of", "for", "regarding", "related to", "associated with", etc. may also be rewritten with each other.

[0393] As described above, the invention related to the present disclosure has been described in detail. However, for those skilled in the art, the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure. The invention related to the present disclosure can be implemented in the form of modifications and changes without departing from the gist and scope of the invention determined based on the description in the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not carry any restrictive meaning with respect to the invention related to the present disclosure.

Claims

1. A terminal, comprising: a receiving unit that receives a synchronization signal / physical broadcast channel block (SS / PBCH block) including a first synchronization signal, a second synchronization signal, and a physical broadcast channel in a first wireless communication system, and receives a signal group for the second wireless communication system in the second wireless communication system; and a control unit that controls at least one of synchronization processing, frequency offset correction, cell ID determination, system information acquisition, and cell positioning in the second wireless communication system based on both the SS / PBCH block and the signal group.

2. The terminal according to claim 1, wherein the signal group does not include at least one of the first synchronization signal, the second synchronization signal, and the physical broadcast channel.

3. The terminal according to claim 1, wherein the control unit determines at least one of a cell ID, a beam ID, and a frame number corresponding to the second wireless communication system based on the relationship between the time positions of the SS / PBCH block and the signal group.

4. The terminal according to claim 1, wherein in a case where one symbol supported in the first wireless communication system includes a plurality of symbols supported in the second wireless communication system, they are mapped such that a plurality of SS / PBCH blocks and a plurality of signal groups overlap in the time domain.

5. A wireless communication method of a terminal, comprising: a step of receiving a synchronization signal / physical broadcast channel block (SS / PBCH block) including a first synchronization signal, a second synchronization signal, and a physical broadcast channel in a first wireless communication system, and receiving a signal group for the second wireless communication system in the second wireless communication system; and a step of controlling at least one of synchronization processing, frequency offset correction, cell ID determination, system information acquisition, and cell positioning in the second wireless communication system based on both the SS / PBCH block and the signal group.

6. A base station, comprising: a transmitting unit that transmits a signal group for the second wireless communication system in the second wireless communication system to a terminal connected to a first wireless communication system that transmits a synchronization signal / physical broadcast channel block (SS / PBCH block) including a first synchronization signal, a second synchronization signal, and a physical broadcast channel; and a control unit that controls to transmit the signal group in a resource associated with a resource corresponding to a specific SS / PBCH block.

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