Terminal and communication method

Abstract

A terminal is provided with: a control unit that sets a random access channel opportunity for transmitting a random access channel; and a transmission unit that transmits the random access channel on the basis of the set random access channel opportunity. The random access channel opportunities are set such that the number of random access channel opportunities multiplexed in the frequency direction at a first position in the time direction is different from the number of random access channel opportunities multiplexed at a second position in the time direction.

Description

Technical Field

[0001] This invention relates to terminals and communication methods in wireless communication systems. Background Technology

[0002] In NR (New Radio) (also known as "5G"), which is the successor system to LTE (Long Term Evolution), technologies are being researched to meet the requirements of high-capacity systems, high-speed data transmission, low latency, simultaneous connection of multiple terminals, low cost, and power saving (e.g., Non-Patent Literature 1).

[0003] Furthermore, in 3GPP (registered trademark) version 18, in order to achieve environmental sustainability, carbon neutrality, SDGs (Sustainable Development Goals), and reduction of operating costs, methods for increasing the importance of network energy savings and implementing energy-saving measures are being studied (e.g., non-patent literature 2).

[0004] To reduce network power consumption, research is underway on dynamically controlling SSB (SS / PBCH block) transmission opportunities in NES (Network Energy Saving) mode, so that network transmission modules (e.g., base stations) can be put into sleep mode in a fine and flexible manner.

[0005] Existing technical documents

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 38.300 V18.0.0 (2023-12)

[0008] Non-Patent Literature 2: "New WID: Network energy savings for NR", RP-223540, 3GPPTSG RAN Meeting #98-e, December 2022

[0009] Non-patent literature 3: 3GPP TR 38.822 V17.1.0 (2023-06)

[0010] Non-patent literature 4: 3GPP TS 38.331 V17.6.0 (2023-09) Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] However, the dynamic adaptation of SSB transmission opportunities does not explicitly define how to associate RACH occasions (ROs) corresponding to SSB transmissions. Therefore, through dynamic adaptation of SSB transmission opportunities, terminals may concentrate on the region of a specific SSB beam (i.e., the SSB index), thereby increasing the number of RACH transmissions in ROs associated with that specific SSB beam, while potentially not transmitting in other ROs.

[0013] Methods for solving problems

[0014] The terminal of this embodiment includes: a control unit that sets random access channel opportunities for transmitting random access channels; and a transmission unit that transmits the random access channels based on the set random access channel opportunities, wherein the random access channel opportunities are set such that the number of random access channel opportunities multiplexed in the frequency direction at a first position in the time direction is different from the number of random access channels multiplexed at a second position in the time direction.

[0015] Invention Effects

[0016] According to this embodiment, in a wireless communication system, it is possible to flexibly associate ROs with SSBs. Attached Figure Description

[0017] Figure 1 This is a diagram used to illustrate the wireless communication system of this embodiment.

[0018] Figure 2 This is a diagram illustrating an example of the initial access procedure between the UE and the gNB.

[0019] Figure 3 This is a diagram illustrating an example of the structure of an SSB in an NR.

[0020] Figure 4A This is a diagram used to illustrate the RACH occasion (RO) setting.

[0021] Figure 4B This is a diagram used to illustrate the RO settings.

[0022] Figure 5A This is a diagram illustrating an example of the information element of RACH-ConfigCommon contained in SIB1.

[0023] Figure 5B This is a diagram illustrating an example of the RACH-ConfigGeneric information element contained in SIB1.

[0024] Figure 5C This diagram shows a previous RO (Reverse Oscillator) configuration example.

[0025] Figure 5D This diagram shows a previous RO (Reverse Oscillator) configuration example.

[0026] Figure 6A This is a diagram illustrating an example of setting the frequency direction of RO in the first embodiment.

[0027] Figure 6B This is a diagram showing an example of setting the frequency direction of RO in the first embodiment.

[0028] Figure 7A This is a diagram showing an example of RO configuration in the second embodiment.

[0029] Figure 7B This is a diagram showing an example of RO configuration in the second embodiment.

[0030] Figure 7C This is a diagram showing an example of RO configuration in the second embodiment.

[0031] Figure 8 This is a diagram illustrating an example of the steps performed by the terminal in the third embodiment.

[0032] Figure 9 This is a timing diagram illustrating an example of the process between the terminal and the base station in the fifth embodiment.

[0033] Figure 10 This is a timing diagram illustrating an example of the process between the terminal and the base station in the seventh embodiment.

[0034] Figure 11 This is a diagram illustrating an example of the functional structure of the base station according to this embodiment.

[0035] Figure 12 This is a diagram illustrating an example of the functional structure of the terminal in this embodiment.

[0036] Figure 13 This is a diagram illustrating an example of the hardware structure of a base station or terminal according to this embodiment.

[0037] Figure 14 This is a diagram illustrating an example of the structure of the vehicle according to this embodiment. Detailed Implementation

[0038] Hereinafter, this embodiment will be described with reference to the accompanying drawings. Furthermore, one or more embodiments described below are examples, and the application of this invention is not limited to the embodiments described below.

[0039] In operating the wireless communication system of this embodiment, existing technologies may be appropriately used. These existing technologies include, but are not limited to, existing NR or LTE. Furthermore, unless otherwise stated, the term "LTE" as used in this specification has a broad meaning that includes LTE-Advanced and subsequent methods (e.g., NR).

[0040] Furthermore, in the embodiments described below, the existing LTE terms such as SS (Synchronization Signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) are used. These are for ease of description, and the same signals and functions may also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used for NR are not necessarily explicitly written as "NR-".

[0041] Furthermore, in this embodiment, the duplex mode can be TDD (Time Division Duplex), FDD (Frequency Division Duplex), or other modes (e.g., Flexible Duplex).

[0042] Furthermore, in this embodiment, the "configure" wireless parameters can be pre-configured predetermined values ​​or wireless parameters notified from the base station or terminal.

[0043] (System Structure)

[0044] Figure 1 This is a diagram used to illustrate the wireless communication system of this embodiment.

[0045] like Figure 1 As shown, the wireless communication system of this embodiment includes a base station 10 and a terminal 20. Figure 1 The image shows one base station 10 and one terminal 20, but this is just an example and there can be multiple terminals.

[0046] Base station 10 is a communication device that provides one or more cells and communicates wirelessly with terminal 20. The physical resources of the wireless signal are defined in the time and frequency domains. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. Furthermore, the TTI (Transmission Time Interval) in the time domain can be a time slot or a subframe.

[0047] Base station 10 sends synchronization signals and system information to terminal 20. Synchronization signals may be, for example, NR-PSS and NR-SSS. System information is transmitted via NR-PBCH, also known as broadcast information. Synchronization signals and system information can also be referred to as SSB (SS / PBCH block). Figure 1 As shown, base station 10 sends control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of beamforming for signal transmission and reception. Furthermore, both base station 10 and terminal 20 can apply MIMO (Multiple Input Multiple Output) based communication to DL or UL. Additionally, base station 10 and terminal 20 can also communicate via CA (Carrier Aggregation) based secondary cells (SCell) and primary cells (PCell). Moreover, terminal 20 can also communicate via DC (Dual Connectivity) based primary cells of base station 10 and primary / secondary cells of other base stations 10 (PSCell).

[0048] Terminal 20 is a communication device with wireless communication capabilities, such as a smartphone, mobile phone, tablet computer, wearable terminal, or M2M (Machine-to-Machine) communication module. Figure 1 As shown, terminal 20 receives control signals or data from base station 10 via DL and transmits control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Furthermore, terminal 20 receives various reference signals transmitted from base station 10 and performs propagation path quality measurements based on the reception results of these reference signals. Alternatively, terminal 20 can be referred to as UE, and base station 10 as gNB.

[0049] Figure 2 This diagram illustrates an example of the initial access procedure between the UE and the gNB. The following steps are performed during the initial access procedure.

[0050] 1) PSS detection

[0051] Time and frequency synchronization, part of physical cell ID.

[0052] 2) SSS detection

[0053] Part of physical cell ID

[0054] 3) PBCH-DMRS detection

[0055] Part of the SSB index within a 5 ms half-radio frame.

[0056] 4) PBCH reading

[0057] SFN number and radio frame timing (SSB index)

[0058] Configuration information for RMSI reading.

[0059] Whether the UE can camp on the cell (carrier) or not.

[0060] 5) PDCCH Receive -> SIB1 PDSCH

[0061] Cell configuration information and initial access information (e.g., PRACH configuration)

[0062] 6) PRACH (Msg1) transmission

[0063] The first transmit signal for the initial access procedure.

[0064] 7) PDCCH Receive -> Msg2 PDSCH (RAR: Random Access Response)

[0065] TA (Timing Advance), TC-RNTI, and Msg3 scheduling (RAR UL Authorization)

[0066] 8) Send Msg3 PUSCH

[0067] RRC establishment request (including UE ID)

[0068] 9) PDCCH Receive -> Msg4 PDCSH

[0069] Competition resolution: TC-RNTI -> C-RNTI

[0070] Figure 3 This diagram illustrates an example of the structure of an SSB in an NR. An SSB is an example of a synchronization signal block.

[0071] The SSB has a bandwidth of 20 RBs and 4 symbols. The LTE SS / PBCH has a bandwidth of 6 RBs and 6 symbols. Thus, the SSB has a wider bandwidth than the LTE SS / PBCH, but fewer symbols than the LTE SS / PBCH.

[0072] The transmission period of the LTE SS / PBCH is fixed at 5 / 10ms. On the other hand, the transmission period of the SSB can be flexibly set from 5, 10, 20, 40, 80, and 160ms.

[0073] The symbol position of the LTE SS / PBCH is a fixed single position. On the other hand, the symbol position of the SSB is multiple candidate symbol positions within a 5ms half-radio frame. The symbol position of the SSB is fixed at 4 / 8 / 64 relative to the frequency range of 0-3 / 3-6 / 6-52.6 GHz, respectively.

[0074] Figure 4A This is a diagram illustrating an example of the PRACH occasion setting when PRACH config.index is 0. Figure 4B This is a diagram showing an example of the PRACH occasion settings when PRACH config.index is 89.

[0075] The association between the SSB index and the RO (the association between the SSB index and the RACH occasion) is set using the RRC parameter included in SIB1. Figure 5A This is a diagram illustrating an example of the information element of RACH-ConfigCommon contained in SIB1. Figure 5B This is a diagram illustrating an example of the RACH-ConfigGeneric information element contained in SIB1. Figure 5C as well as Figure 5D This is a diagram showing an example of the RACHoccasion (RO) setup.

[0076] Figure 5A The “ssb-perRACH-OccasionAndCB-PreamblesPerSSB” contained in RACH-ConfigCommon represents the number of SSBs associated with a RO and the number of preamble indices associated with an SSB.

[0077] Figure 5B The “msg1-FDM” contained in RACH-ConfigGeneric indicates the number of ROs allocated in the frequency domain (i.e., the same location in the time domain).

[0078] Figure 5C This shows an example of RO settings when RACH-ConfigCommon's ssb-perRACH-OccasionAndCB-PreamblesPerSSB is set to "two" and RACH-ConfigGeneric's msg1-FDM is set to "one". Figure 5C In the example, each RO is associated with two SSBs and is assigned one RO in the frequency domain.

[0079] Figure 5DThis shows an example of RO settings when RACH-ConfigCommon's ssb-perRACH-OccasionAndCB-PreamblesPerSSB is set to "oneHalf" and RACH-ConfigGeneric's msg1-FDM is set to "two". Figure 5D In the example, each RO is associated with 0.5 (one half) SSBs, and 2 ROs are allocated in the frequency domain.

[0080] To reduce network power consumption, research is underway on dynamically controlling SSB transmission opportunities in NES mode to enable network transmission modules (e.g., base stations) to hibernate in a fine and flexible manner.

[0081] The association of SSB index-RACH occasions is set through RRC parameters under SIB1. To update these RRC parameters, the contents of SIB1 need to be changed. There are situations where it is necessary to send a change notification based on RRCReconfiguration to the terminal (UE) in the RRC connection.

[0082] However, in the past, the association of ROs corresponding to SSB transmission opportunities in dynamic adaptation of SSB transmission opportunities was unclear. Furthermore, through dynamic adaptation of SSB transmission opportunities, terminals concentrate on the region of a specific SSB beam (i.e., SSB index), thereby increasing PRACH transmissions in RACH occasions associated with that specific SSB beam. On the other hand, it may be impossible to perform transmissions in other RACH occasions.

[0083] According to this embodiment, it is possible to appropriately perform dynamic adaptive association with the RO corresponding to the SSB, taking into account the SSB transmission opportunity.

[0084] The embodiments shown in this implementation plan can be executed independently or in combination.

[0085] (First embodiment)

[0086] like Figure 5C as well as Figure 5DAs shown, conventionally, only the following setting is possible: making the number of ROs in the frequency direction the same in the time direction. According to the first embodiment, in setting the frequency direction of ROs, different values ​​can also be set in the time direction. In other words, for example, the number of ROs multiplexed in the frequency direction at the same position (first position) in the time direction is different from the number of ROs multiplexed at other same positions (second positions) in the time direction. The frequency direction setting of ROs can be set, for example, by a parameter that specifies the number of ROs that are at the same position in the time direction but can be multiplexed with different settings in the frequency direction. The parameter in this embodiment can be a new parameter, or it can be a parameter that is an extension or modification of the conventional msg1-FDM.

[0087] like Figure 6A as well as Figure 6B As shown, in the time direction, the number of ROs that are multiplexed in the frequency direction is set differently.

[0088] exist Figure 6A In the example, one RO#0 is set in the first time unit, two RO#1 and RO#2 are set in the second time unit, one RO#3 is set in the third time unit, and two RO#4 and RO#5 are set in the fourth time unit.

[0089] exist Figure 6B In the example, four RO#0-RO#3 are set in the first time unit, and one RO#4 is set in the second time unit.

[0090] The unit that can set different values ​​for the time direction can be a symbol, RO (multiple symbols determined by the number of PRACH occasions in the time domain within the PRACH slot and the PRACH duration), slot, radio frame, submsec, msec, or sec.

[0091] The frequency direction setting of the RO (i.e., the number of ROs multiplexed in the frequency direction at the same position in the time direction) can be selected from {one, two, four, eight}. However, the value used to set the frequency direction of the RO is not limited to this and can be any value.

[0092] You can also set predetermined relationships and / or restrictions on the number of ROs in the time and frequency directions. For example, the predetermined relationships are "when there are X ROs in the time direction, only X types of ROs can be set in the frequency direction", "for the next or previous RO in the time direction, only one of the smaller or larger candidate numbers in the frequency direction can be set", etc.

[0093] As a method for setting the number of ROs in the frequency direction in the first embodiment, the number of ROs in different frequency directions can also be set in a certain time unit. As another method, the number of ROs in the frequency direction can also be set by combining multiple RO settings (e.g., RACH-ConfigCommon / RACH-ConfigGeneric) into a set.

[0094] As described above, according to the first embodiment, the number of ROs multiplexed in the frequency direction at the same position (first position) in the time direction is different from the number of ROs multiplexed at other same positions (second positions) in the time direction. Furthermore, according to the first embodiment, the terminal 20 can also receive setting information from the base station 10 indicating the number of ROs in different frequency directions for each position in the time direction, and set the ROs based on the setting information.

[0095] According to the first embodiment, the terminal 20 is able to appropriately perform a dynamically adaptive RO setting that takes into account the SSB transmission opportunity.

[0096] (Second Embodiment)

[0097] According to the second embodiment, the number of SSBs (SSB indices) associated with a RO can also be set with different SSBs (SSB indices) for each RO of all ROs.

[0098] exist Figure 7A In the example, for each of RO#0, RO#1, RO#2 and RO#3, the number of associated SSBs is 2.

[0099] exist Figure 7B In the example, RO#0 is associated with two SSBs with SSB indices 0-1; RO#1 and RO#2 are associated with four SSBs with SSB indices 2-4; RO#3 is associated with two SSBs with SSB indices 6-7; and RO#4 and RO#5 are associated with four SSBs with SSB indices 8-11.

[0100] exist Figure 7C In the example, RO#0 is associated with two SSBs with SSB indices 0-1, RO#1 is associated with two SSBs with SSB indices 2-3, RO#2 is associated with three SSBs with SSB indices 4-6, RO#3 is associated with two SSBs with SSB indices 7-8, and RO#4 and RO#5 are associated with four SSBs with SSB indices 9-11.

[0101] The setting of the SSB associated with the RO in the second embodiment can also be applied only when the setting of the number of ROs in the frequency direction in the first embodiment is performed simultaneously. The setting in the second embodiment can also be applied only when it is not performed simultaneously with the setting in the first embodiment. As another example, the setting in the second embodiment can also be performed independently of the setting in the first embodiment.

[0102] You can also set values ​​related to different SSBs (SSB indices) for each RO that is different in frequency direction within a predetermined time unit.

[0103] You can also set values ​​related to different SSBs (SSB indexes) for each RO with different time directions in a predetermined time unit.

[0104] The predetermined time unit can be a symbol, RO (multiple symbols determined by the number of PRACH occasions in the time domain within a PRACH slot and the duration of the PRACH), a slot, a radio frame, submsec, msec, or sec.

[0105] In the second embodiment, the setting of associating ROs with SSBs can also be performed by setting a predetermined value related to the associated SSB within a predetermined time unit. Alternatively, the setting in the second embodiment can be performed by setting a predetermined value related to the bound SSB for a specific RO. Furthermore, the setting in the second embodiment can be performed by setting a predetermined value related to the associated SSB for a set of ROs (e.g., multiple ROs with the same number of ROs in the frequency direction). As another example, the setting in the second embodiment can also be performed through any combination of the above-described setting methods.

[0106] In the second embodiment, the predetermined value of the SSB associated with the RO can be the number of SSB indices, the range of SSB indices, the list of SSB indices, or the SSB position.

[0107] Thus, according to the second embodiment, the number of SSB indexes associated with a RO (first RO) can also be set to be different from the number of SSB indexes associated with other ROs (second ROs). Furthermore, according to the second embodiment, the terminal 20 can also receive the following setting information from the base station 10: the setting information indicates the number of SSB indexes associated with each RO for each location in the time direction, or indicates the number of SSB indexes associated with each RO, and based on the setting information, associate the SSB indexes with each RO.

[0108] According to the second embodiment, it is possible to appropriately perform dynamic adaptive association with the RO corresponding to the SSB, taking into account the SSB transmission opportunity.

[0109] (Third embodiment)

[0110] According to the third embodiment, regarding the binding (association) of SSB and RO, a predetermined value (e.g., their product) (denoted as (value 1)) calculated from "the (total) number of SSBs (SSB indices) for each set RO" and "the number of set ROs" can be a different value than "the number of set / actually sent SSBs (SSB indices)" (denoted as (value 2)). Even when (value 1) and (value 2) are different values, the terminal 20 can still apply the predetermined binding.

[0111] Figure 8 This is a diagram illustrating an example of the steps performed by terminal 20 in the third embodiment. (See diagram for example.) Figure 8 As shown, in step S101, terminal 20 determines whether (value 1) and (value 2) are different values. In step S102, if (value 1) and (value 2) are different values, terminal 20 applies a predetermined binding.

[0112] The predetermined binding in the third embodiment can also be the setting of the SSB (SSB index) associated with the RO in the second embodiment.

[0113] The number of SSBs (SSB indices) can be determined, for example, by the following parameter / UE measurement. The parameter used to determine the number of SSBs (SSB indices) is Ssb-positionsInBurst or the number of SSB measurements at SSB positions that are above a predetermined value, etc.

[0114] The number of ROs can also be determined by the following parameters, for example: the number of time domain PRACH occasions within a PRACH slot, the starting symbol, the number of PRACH slots, the PRACH duration, the PRACH format, and the PRACH configuration index.

[0115] Regarding the predetermined binding in the third embodiment, for example, when (value 1) is greater than (value 2), it is also possible to "ignore the setting of (value 1) and allocate (value 2) in a forward-aligned or backward-aligned manner in the time direction", or to "ignore the setting of (value 1) so that the RO / SSB index (the number of ROs per SSB index) is a uniform or nearly uniform value for (value 2) RO / SSB index, and allocate SSB (SSB index) to RO in a forward-aligned manner in the time direction".

[0116] Regarding the predetermined binding in the third embodiment, for example, when (value 1) is less than (value 2), "the setting of (value 1) can also be ignored so that the RO / SSB index for (value 2) is as uniform as possible, and the SSB (SSB index) is assigned to the RO in a forward alignment in the time direction", "or the SSB (SSB index) that exceeds (value 1) and is forward or backward in the time direction of (value 2) is not assigned to the RO".

[0117] Regarding the predetermined binding in the third embodiment, for example, if the difference between (value 1) and (value 2) is greater than a predetermined value, the binding is determined to be invalid, and the terminal can perform a predetermined action (e.g., always sending PRACH via RO#1, sending a binding change request signal to the network (e.g., base station 10), or not performing camp-on / initial access to the cell, etc.). Even if (value 1) and (value 2) are different, the terminal 20 can still perform the aforementioned predetermined action.

[0118] (Fourth embodiment)

[0119] According to the fourth embodiment, regarding the valid ROs that the terminal 20 can use, in addition to the existing RO parameters (e.g., RACH-ConfigCommon / RACH-ConfigGeneric), it is also possible to set parameters that can be applied (or masked) as valid or invalid.

[0120] (Fifth Embodiment)

[0121] As a new parameter of SIB1, multiple RO modes can be set (for NES). In addition to the existing single RO setting (e.g., RACH-ConfigCommon / ), multiple ROs can also be set for terminals 20 that support subsequent versions of NES (e.g., version 19 NESUE). Each RO mode can include a setting that extends the association between the SSB index and the RO in the above embodiments.

[0122] Figure 9 This is a timing diagram illustrating an example of the process between terminal 20 and base station 10 in the fifth embodiment. For example... Figure 9As shown, in step S11, base station 10 sends SIB1 containing multiple RO modes as new parameters. In step S12, terminal 20 sends PRACH to base station 10.

[0123] Terminal 20, which supports subsequent versions of NES, can ignore one of the existing RO settings and only refer to the new RO to perform the scheduled actions when multiple RACH occasions are set.

[0124] Identifiers can be set for each mode, or the mode to be used can be determined by notifying the terminal 20 of the identifier.

[0125] Identifiers can be implicitly associated by the order of a list defined by RRC, or they can be explicitly associated by setting a number.

[0126] For example, in addition to the existing parameters of RACH-ConfigCommon#1, SIB1 may also include NR-19 NES parameters of RACH-ConfigCommon#2.

[0127] Multiple RO modes can be managed by setting multiple modes for terminal 20 through RRC settings as "addmodlist" and / or "releaselist".

[0128] (Sixth embodiment)

[0129] Multiple RO patterns can also be configured as multiple sets. Identifiers can be assigned to each set, and the set used can be determined by notifying the identifiers. The RO patterns contained in a set can also be determined by setting these identifiers.

[0130] (Seventh Embodiment)

[0131] Regarding each RO mode, the activation / deactivation of the RO mode can be notified via UE-specific signaling and / or UE-public signaling.

[0132] Figure 10 This is a timing diagram illustrating an example of the process between terminal 20 and base station 10 in the seventh embodiment. For example... Figure 10 As shown, in step S20, base station 10 sends UE-specific signaling and / or UE common signaling containing the RO mode's activation / deactivation. In step S21, base station 10 sends SIB1. In step S22, terminal 20 sends PRACH to base station 10.

[0133] When the RO mode is activated, the time settings (cycle / offset / duration) associated with that RO mode can be applied. When the RO mode is deactivated, the time settings (cycle / offset / duration) associated with that RO mode can be left unapplied.

[0134] When the RO mode is activated, the RO mode (additionally set / notified by the identifier / selected by the UE) can also be applied. When the RO mode is deactivated, the existing RO setting (version 15) can be applied instead of the RO mode (additionally set / notified by the identifier / selected by the UE).

[0135] (Eighth Embodiment)

[0136] The RO settings / notifications mentioned above can be configured through the SI / SIB subsystem, or they can be configured via a UE-specific RRC signal (e.g., RRCReconfiguration) for terminal 20 in the RRC connection.

[0137] (Ninth Embodiment)

[0138] The predetermined parameters involved in the beam applied to a certain SSB (SSB index) can be changed without notifying the terminal. The terminal 20 can assume the change of the beam at each certain period and (re)execute the predetermined actions related to RRM. It can also execute the predetermined actions involved in L1 measurement and L3 measurement, and can also assume the predetermined actions involved in the receiving beam assumed in QCLtype D.

[0139] For example, terminal 20 can envision each cycle of SSB and / or SIB1. If the relationship between the SSB index and the beam changes after X seconds, the above actions will be (re)executed. For example, the terminal can also execute PRACH.

[0140] (Device structure)

[0141] Next, an example of the functional structure of the base station 10 and the terminal 20 performing the processes and actions described above will be explained. The base station 10 and the terminal 20 include the functions of performing the embodiments described above. However, the base station 10 and the terminal 20 may each possess only the functions of any one of the proposed embodiments.

[0142] <Base Station 10>

[0143] Figure 11 This is a diagram illustrating an example of the functional structure of a base station. (For example...) Figure 11As shown, the base station 10 includes a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. Figure 11 The functional structure shown is only one example. The functional divisions and names of the functional units can be arbitrary, as long as the operation of this embodiment can be performed. The transmitting unit 110 and the receiving unit 120 can also be referred to as communication units.

[0144] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and wirelessly transmitting the signal. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-level information from the received signals. Furthermore, the transmitting unit 110 has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc., to the terminal 20. Additionally, the transmitting unit 110 transmits setting information, etc., as described in the embodiment.

[0145] The setting unit 130 stores preset setting information and various setting information sent to the terminal 20 into a storage device, and reads it from the storage device as needed. The control unit 140, for example, performs overall control of the base station 10, including control related to signal transmission and reception. Alternatively, the signal transmission-related functions of the control unit 140 may be included in the transmitting unit 110, and the signal reception-related functions of the control unit 140 may be included in the receiving unit 120. Furthermore, the transmitting unit 110 and the receiving unit 120 may be referred to as a transmitter and a receiver, respectively.

[0146] Terminal 20

[0147] Figure 12 This is a diagram illustrating an example of the functional structure of a terminal. (For example...) Figure 12 As shown, the terminal 20 includes a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. Figure 12 The functional structure shown is only one example. The functional divisions and names of the functional units can be arbitrary, as long as the operation of this embodiment can be performed. The transmitting unit 210 and the receiving unit 220 can also be referred to as communication units.

[0148] The transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. Furthermore, the transmitting unit 210 transmits HARQ-ACK, and the receiving unit 220 receives setting information, etc., as described in the embodiment.

[0149] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 in a storage device and reads it from the storage device as needed. Furthermore, the setting unit 230 also stores pre-set setting information. The control unit 240 performs overall control of the terminal 20, including control related to signal transmission and reception. Alternatively, the signal transmission-related functions of the control unit 240 can be included in the transmitting unit 210, and the signal reception-related functions of the control unit 240 can be included in the receiving unit 220. Alternatively, the transmitting unit 210 and the receiving unit 220 can be referred to as a transmitter and a receiver, respectively.

[0150] The terminal or base station in this embodiment can be configured as shown in the following descriptions. Alternatively, the following communication methods can also be implemented.

[0151] <Structures related to this embodiment>

[0152] (Item 1)

[0153] A terminal that has: The control unit sets the random access channel opportunities for transmitting the random access channel; and The transmitting unit transmits the random access channel based on the predetermined random access channel opportunity. The random access channel opportunities are configured such that the number of random access channel opportunities multiplexed in the frequency direction at a first position in the time direction is different from the number of random access channels multiplexed at a second position in the time direction.

[0154] (Item 2)

[0155] The terminal according to the first item includes a receiving unit that receives setting information from a base station, the setting information indicating the number of random access channel opportunities in different frequency directions for each location in the time direction, and the control unit setting the random access channel opportunities based on the setting information.

[0156] (Item 3)

[0157] According to the terminal described in claim 1, the terminal includes a receiving unit for receiving synchronization signal blocks, and the control unit associates the index of the synchronization signal blocks with each of the random access channel opportunities. The random access channel opportunities include a first opportunity and a second opportunity. The number of indexes of the synchronization signal block associated with the first opportunity is different from the number of indexes of the synchronization signal block associated with the second opportunity.

[0158] (Item 4)

[0159] The terminal according to claim 3 includes a receiving unit that receives setting information from a base station. The setting information indicates, for each position in the time direction, the number of indices of the synchronization signal blocks associated with the random access channel opportunity, or the number of indices of the synchronization signal blocks associated with each random access channel opportunity. Based on the setting information, the control unit associates the index of the synchronization signal block with each of the random access channel opportunities.

[0160] (Item 5)

[0161] According to the terminal described in claim 1, a receiving unit is provided for receiving synchronization signal blocks. When the product of the total number of indexes of the synchronization signal blocks associated with each of the random access channel opportunities and the number of the random access channel opportunities is different from the number of indexes of the synchronization signal blocks, the control unit associates the indexes of the synchronization signal blocks with each of the random access channel opportunities in such a way that the number of the random access channel opportunities corresponding to the number of indexes of each synchronization signal block is close to the average value.

[0162] (Item 6)

[0163] A communication method executed by a terminal includes the following steps: setting random access channel opportunities for transmitting a random access channel; and transmitting the random access channel based on the set random access channel opportunities, wherein the random access channel opportunities are set such that the number of random access channel opportunities multiplexed in the frequency direction at a first position in the time direction is different from the number of random access channels multiplexed at a second position in the time direction.

[0164] According to any of the above structures, a dynamically adaptive RO setting that takes into account SSB transmission opportunities can be appropriately performed in the wireless communication system. According to the second statement, based on setting information from the base station, the terminal can flexibly set the RO in the frequency direction. According to the third statement, a dynamically adaptive association with the RO corresponding to the SSB that takes into account SSB transmission opportunities can be appropriately performed. According to the fourth statement, the terminal can appropriately associate the RO corresponding to the SSB based on setting information from the base station.

[0165] (Hardware structure)

[0166] The block diagrams used in the description of the above embodiments ( Figure 11 as well as Figure 12The diagram illustrates blocks organized by function. These functional blocks (components) are implemented through any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. Functional blocks can also be implemented by combining software within the aforementioned single or multiple devices.

[0167] The functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, the functional block (structural part) that performs the sending function is called the transmitting unit or transmitter. In short, as mentioned above, there are no particular limitations on the implementation method.

[0168] For example, in one embodiment of this disclosure, the base station 10, terminal 20, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 13 This is a diagram illustrating an example of the hardware structure of a base station 10 and a terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 may also be configured as a computer device that physically includes a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0169] Furthermore, in the following description, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware structure of base station 10 and terminal 20 can be configured to include one or more of the devices shown in the figures, or it can be configured to include no part of the device.

[0170] The functions of base station 10 and terminal 20 are implemented by reading predetermined software (program) into hardware such as processor 1001 and storage device 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of reading and writing data in storage device 1002 and auxiliary storage device 1003.

[0171] The processor 1001 controls the computer as a whole by instructing the operating system to operate. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, the control unit 140 and control unit 240 described above can also be implemented using the processor 1001.

[0172] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage devices 1003 and communication devices 1004, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the actions described in the above embodiments. For example, Figure 11 The control unit 140 of the base station 10 shown can be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Additionally, for example, Figure 12 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, the various processes described above can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by one or more chips. In addition, the program can also be sent from the network via a telecommunications line.

[0173] Storage device 1002 is a computer-readable recording medium, and may be composed of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory). Storage device 1002 may also be referred to as a register, cache, main memory (main storage device), etc. Storage device 1002 can store programs (program code), software modules, etc., that are executable for implementing the communication method according to one embodiment of this disclosure.

[0174] The auxiliary storage device 1003 is a computer-readable recording medium, such as at least one of the following: CD-ROM (CompactDisc ROM) or other optical discs, hard disks, floppy disks, magneto-optical discs (e.g., compact discs, digital multifunction discs, Blu-ray discs), smart cards, flash memory (e.g., cards, sticks, key drives), floppy disks, magnetic stripes, etc. The aforementioned storage medium may, for example, be a database, server, or other suitable media that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0175] The communication device 1004 is hardware (transceiver) used for communication between computers via at least one of a wired network and a wireless network. It may also be referred to as a network device, network controller, network interface card (NIC), communication module, etc. The communication device 1004 may, for example, be configured to include a high-frequency switch, duplexer, filter, frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, transceiver antennas, amplifiers, transceiver units, transmission path interfaces, etc., can also be implemented using the communication device 1004. The transceiver unit may also be physically or logically separated into a transmitting unit and a receiving unit.

[0176] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED, etc.). Alternatively, input device 1005 and output device 1006 can also be integrated (e.g., a touch panel).

[0177] Furthermore, the processor 1001 and storage device 1002, among other devices, are connected via a bus 1007 for communicating information. The bus 1007 can be configured using a single bus or different buses can be used between each device.

[0178] Furthermore, the base station 10 and the terminal 20 can be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or a FPGA (Field Programmable Gate Array), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0179] Figure 14 An example of the structure of vehicle 2001 is shown. For example... Figure 14 As shown, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gearshift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. The various forms / implementations described in this disclosure can also be applied to communication devices mounted on the vehicle 2001, for example, to the communication module 2013.

[0180] The drive unit 2002 may be composed, for example, an engine, a motor, or a hybrid power system of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a steering wheel) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0181] The electronic control unit 2010 consists of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (I / O port) 2033. Signals from various sensors 2021 to 2029 of the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 can also be referred to as an ECU (Electronic Control Unit).

[0182] The signals from various sensors 2021 to 2029 include current signals from current sensor 2021 that monitors the current of the motor, speed signals of the front and rear wheels obtained by speed sensor 2022, air pressure signals of the front and rear wheels obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depress signal obtained by accelerator pedal sensor 2029, brake pedal depress signal obtained by brake pedal sensor 2026, gear lever operation signal obtained by gear lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0183] The Information Service Unit 2012 consists of various devices such as a car navigation system, audio system, speakers, television, and radio, which provide various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The Information Service Unit 2012 uses information obtained from external devices via communication modules 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0184] The Driver Assistance System 2030 comprises various devices used to prevent accidents or reduce driver workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning devices (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyroscope systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the Driver Assistance System 2030 transmits and receives various information via the communication module 2013 to achieve driver assistance or autonomous driving functions.

[0185] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via the communication port. For example, the communication module 2013 can send and receive data with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear shift lever 2006, front wheel 2007, rear wheel 2008, axle 2009, microprocessor 2031 in the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021 to 29 in the vehicle 2001 via the communication port 2033.

[0186] The communication module 2013, controlled by the microprocessor 2031 of the electronic control unit 2010, is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. External devices can be, for example, base stations, mobile stations, etc.

[0187] The communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication. Additionally, the communication module 2013 also transmits the following signals input to the electronic control unit 2010 via wireless communication to external devices: the front and rear wheel speed signals obtained by the speed sensor 2022; the front and rear wheel air pressure signals obtained by the air pressure sensor 2023; the vehicle speed signal obtained by the vehicle speed sensor 2024; the acceleration signal obtained by the acceleration sensor 2025; the accelerator pedal depressor signal obtained by the accelerator pedal sensor 2029; the brake pedal depressor signal obtained by the brake pedal sensor 2026; the gear shift lever operation signal obtained by the gear shift lever sensor 2027; and the detection signals for detecting obstacles, vehicles, pedestrians, etc., obtained by the object detection sensor 2028.

[0188] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) sent from external devices and displays it on the information service unit 2012 of the vehicle 2001. Furthermore, the communication module 2013 stores the various information received from external devices in a memory 2032 available to the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gearshift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, and sensors 2021-2029 of the vehicle 2001 based on the information stored in the memory 2032.

[0189] (Supplement to the implementation method)

[0190] The above description of this embodiment is not limited to this embodiment. Those skilled in the art should understand various modifications, alterations, substitutions, and replacements. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these values ​​are merely examples, and any appropriate values ​​may be used. The distinctions between items in the above description are not essential to the present invention. Items described in two or more items may be combined as needed, and items described in one item may be applied to items described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. Multiple functional units may be operated by a single physical component, or a single functional unit may be operated by multiple physical components. Regarding the processing described in the embodiment, the order of processing may be interchanged unless there is a contradiction. For ease of explanation, a functional block diagram is used to illustrate the base station 10 and terminal 20, but such a device may also be implemented using hardware, software, or a combination thereof. According to this embodiment, the software that operates via the processor of the base station 10 and the software that operates via the processor of the terminal 20 can be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, and other suitable storage media, respectively.

[0191] Furthermore, the notification of information is not limited to the forms / implementations described in this disclosure, and other methods may also be used. For example, information notification may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC connection setup message, an RRC connection reconfiguration message, etc.

[0192] The various forms / implementations described in this disclosure can also be applied to systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The system may include at least one of 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), other suitable systems, and next-generation systems based on, modified, created, or defined by these systems. Furthermore, multiple systems may be combined (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.).

[0193] The processing procedures, timing, and flow of the various forms / implementations described in this specification may be rearranged in order, provided there is no contradiction. For example, the elements of various steps are indicated using an illustrative order for the methods described in this disclosure, but are not limited to the specific order indicated.

[0194] In this specification, certain actions performed by base station 10 may sometimes also be performed by its upper node, depending on the circumstances. In a network consisting of one or more network nodes having base station 10, it is obvious that various actions performed to communicate with terminal 20 can be performed by at least one of base station 10 and other network nodes besides base station 10 (e.g., considering MME or S-GW, but not limited to these). The above example illustrates the case where there is one other network node besides base station 10, but other network nodes can also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0195] The information or signals described in this disclosure can be output from a higher (or lower) layer to a lower (or higher) layer. They can also be input or output via multiple network nodes.

[0196] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0197] The determination in this disclosure can be made by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by a comparison of numerical values ​​(e.g., a comparison with a predetermined value).

[0198] Software, whether called software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0199] In addition, software, commands, information, etc., can be sent and received via a transmission medium. For example, when software is sent from a webpage, 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 within the definition of a transmission medium.

[0200] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc., that may be involved in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0201] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, at least one of the channel and symbol may also be a signal (signaling). Additionally, a signal may also be a message. Furthermore, a component carrier (CC) may also be referred to as carrier frequency, cell, frequency carrier, etc.

[0202] The terms “system” and “network” as used in this disclosure are used interchangeably.

[0203] Furthermore, the information, parameters, etc., described in this disclosure can be represented using absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources can be indicated using indexes.

[0204] The names used for the above parameters are non-limiting in any respect. Furthermore, the formulas, etc., using these parameters sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, therefore the various names assigned to these channels and information elements are non-limiting in any respect.

[0205] In this disclosure, the terms "base station (BS)," "wireless base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Sometimes, terms such as macro cell, small cell, femtocell, and picocell are also used to refer to base stations.

[0206] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its coverage area can be divided into several smaller areas, each of which can provide communication services through a base station subsystem (e.g., a small indoor base station RRH: Remote Radio Head). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0207] In this disclosure, the terms "Mobile Station (MS)," "User Terminal (user terminal)," "User Equipment (UE)," and "Terminal" can be used interchangeably.

[0208] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate terms.

[0209] At least one of the base station and mobile station can also be referred to as a transmitting device, receiving device, communication device, etc. Furthermore, at least one of the base station and mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body can be a vehicle (e.g., a car, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). In addition, at least one of the base station and mobile station also includes devices that do not necessarily move during communication. For example, at least one of the base station and mobile station can be an IoT (Internet of Things) device such as a sensor.

[0210] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, the communication between the base station and the user terminal can be replaced by communication between multiple terminals 20 (e.g., D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), and various forms / implementations of this disclosure can also be applied. In this case, the terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "side"). For example, uplink channel, downlink channel, etc. can also be replaced with side channel.

[0211] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, the base station can also be configured to have the functions of the aforementioned user terminal.

[0212] The terms "determining" and "determining" as used in this disclosure sometimes encompass a variety of actions. For example, "determining" or "determining" may include actions such as judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), and ascertaining, which are considered as actions of "determining" or "determining." Furthermore, "determining" or "determining" may include actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory), which are considered as actions of "determining" or "determining." Moreover, "determining" or "determining" may include actions such as resolving, selecting, choosing, establishing, and comparing, which are considered as actions of "determining" or "determining." That is, "judgment" and "decision" can include matters that are considered as having been "judged" or "decided". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0213] The terms “connected,” “coupled,” or any variations thereof are intended to indicate any direct or indirect connection or combination between two or more elements, including cases where there is one or more intermediate elements between the two elements that are “connected” or “coupled.” The combination or connection between elements can be physical, logical, or a combination of these. For example, “access” can be used instead of “connected.” In the context of this disclosure, it can be understood that two elements are “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, and, as some non-limiting and non-inclusive examples, using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible regions) to “connect” or “couple” to each other.

[0214] The reference signal can be simply called RS (Reference Signal), or, depending on the standard applied, pilot.

[0215] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise expressly stated. In other words, the word "based on" means both "based on only" and "based on at least".

[0216] Any reference to elements using the designations "first," "second," etc., as used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, references to the first and second elements do not imply that only two elements can be taken, or that in any form the first element must precede the second element.

[0217] Alternatively, the "unit" in the structure of the above devices can be replaced with "section", "circuit", "equipment", etc.

[0218] When the terms "include," "including," and their variations are used in this disclosure, these terms, like the term "comprising," imply inclusion. Furthermore, the term "or" as used in this disclosure does not refer to XOR.

[0219] A radio frame can consist of one or more frames in the time domain. In the time domain, one or more frames can be called subframes. A subframe can also consist of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0220] A parameter set can be communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set can represent at least one of the following: Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, and specific windowing processing performed by the transceiver in the time domain.

[0221] In the time domain, a time slot can be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A time slot can be a time unit based on a set of parameters.

[0222] A time slot can contain multiple mini-time slots. Each mini-time slot can consist of one or more symbols in the time domain. Additionally, a mini-time slot can also be called a sub-time slot. A mini-time slot can consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in time units larger than mini-time slots can be called PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using mini-time slots can be called PDSCH (or PUSCH) mapping type B.

[0223] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can each be referred to by other corresponding names.

[0224] For example, one subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, and one time slot or one mini-time slot can also be called a TTI. That is, at least one of the subframe and TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., symbols 1-13), or a period longer than 1ms. In addition, the unit representing TTI can also be called a time slot, mini-time slot, etc., instead of a subframe.

[0225] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules the allocation of radio resources (bandwidth, transmit power, etc., available to each terminal 20) in units of TTI. However, the definition of TTI is not limited to this.

[0226] The Time Interval (TTI) can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a processing unit such as scheduling or link adaptation. Furthermore, when a TTI is given, the actual time interval (e.g., the number of symbols) that the transmission block, code block, codeword, etc., are mapped to can be shorter than that TTI.

[0227] Furthermore, when one time slot or one mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also become the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) constituting the minimum time unit for scheduling can also be controlled.

[0228] A TTI with a duration of 1ms can also be called a normal TTI (TTI in LTE Rel.8-12), a regular TTI, a long TTI, a normal subframe, a regular subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0229] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can be understood as a TTI with a duration of more than 1ms, and a short TTI (e.g., a shortened TTI, etc.) can be understood as a TTI with a duration of less than a long TTI but more than 1ms.

[0230] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0231] Furthermore, the temporal domain of an RB can contain one or more symbols, and can be 1 time slot, 1 mini time slot, 1 subframe, or 1 TTI in length. 1 TTI, 1 subframe, etc., can each be composed of one or more resource blocks.

[0232] In addition, one or more RBs can also be called Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0233] Furthermore, a resource block can consist of one or more resource elements (REs). For example, 1 RE can be a radio resource area with 1 subcarrier and 1 symbol.

[0234] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of contiguous common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can be determined by indexing RBs based on a common reference point of that carrier. PRBs can be defined and numbered within a BWP.

[0235] A BWP can include a UL BWP and a DL BWP. Terminal 20 can also be configured with one or more BWPs within a single carrier.

[0236] At least one of the configured BWPs can be active, and terminal 20 does not intend to transmit or receive predetermined signals / channels outside of the active BWP. Furthermore, the terms "cell," "carrier," etc., used in this disclosure can be replaced with "BWP."

[0237] The structures of radio frames, subframes, time slots, mini-time slots, and symbols described above are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained in a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0238] In this disclosure, for example, in cases where articles are added through translation, such as in English (e.g., a, an, and the), this disclosure may also include cases where the noun following these articles is in a plural form.

[0239] In this disclosure, the phrase "A and B are different" can mean "A and B are not the same." Furthermore, this phrase can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0240] The various methods / implementations described in this disclosure can be used individually, in combination, or switched during execution. Furthermore, the notification of predetermined information (e.g., a "It is X" notification) is not limited to being explicit, but can also be implicit (e.g., not notifying the predetermined information).

[0241] The present disclosure has been described in detail above, but it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the present disclosure is for illustrative purposes only and is not intended to be limiting.

[0242] Label Explanation

[0243] 10 base stations

[0244] 110 Dispatch Department

[0245] 120 Receiving Department

[0246] 130 Setting Department

[0247] 140 Control Department

[0248] 20 terminals

[0249] 210 Sending Department

[0250] 220 Receiving Department

[0251] 230 Setting Department

[0252] 240 Control Department

[0253] 1001 processor

[0254] 1002 Storage device

[0255] 1003 Auxiliary storage device

[0256] 1004 Communication device

[0257] 1005 Input Device

[0258] 1006 Output Device

[0259] Vehicle 2001

[0260] 2002 Drive Unit

[0261] 2003 Steering Unit

[0262] 2004 Accelerator Pedal

[0263] 2005 Brake Pedal

[0264] 2006 gearshift lever

[0265] 2007 front wheel

[0266] 2008 rear wheel

[0267] 2009 axle

[0268] 2010 Electronic Control Department

[0269] 2012 Information Service Department

[0270] 2013 Communication Module

[0271] 2021 Current Sensor

[0272] 2022 Speed ​​Sensor

[0273] 2023 Barometric Pressure Sensor

[0274] 2024 vehicle speed sensor

[0275] 2025 Accelerometer

[0276] 2026 Brake Pedal Sensor

[0277] 2027 Gearshift sensor

[0278] 2028 Object Detection Sensor

[0279] 2029 Accelerator Pedal Sensor

[0280] 2030 Driver Assistance Systems Department

[0281] 2031 microprocessor

[0282] 2032 Memory (ROM, RAM)

[0283] 2033 Communication Port (IO Port)

Claims

1. A terminal, comprising: The control unit sets the random access channel opportunities for transmitting the random access channel; and The transmitting unit transmits the random access channel based on the predetermined random access channel opportunity. The random access channel opportunities are configured such that the number of random access channel opportunities multiplexed in the frequency direction at a first position in the time direction is different from the number of random access channels multiplexed at a second position in the time direction.

2. The terminal according to claim 1, wherein, The terminal includes a receiving unit that receives setting information from a base station. This setting information indicates the number of random access channel opportunities in different frequency directions for each location in the time direction. The control unit sets the random access channel opportunities based on the setting information.

3. The terminal according to claim 1, wherein, The terminal has a receiving unit for receiving synchronization signal blocks. The control unit associates the index of the synchronization signal block with each of the random access channel opportunities. The random access channel opportunities include a first opportunity and a second opportunity. The number of indexes of the synchronization signal block associated with the first opportunity is different from the number of indexes of the synchronization signal block associated with the second opportunity.

4. The terminal according to claim 3, wherein, The terminal includes a receiving unit that receives setting information from a base station. The setting information indicates the number of indices of the synchronization signal blocks associated with the random access channel opportunity for each position in the time direction, or the number of indices of the synchronization signal blocks associated with each random access channel opportunity. Based on the setting information, the control unit associates the index of the synchronization signal block with each of the random access channel opportunities.

5. The terminal according to claim 1, wherein, The terminal has a receiving unit for receiving synchronization signal blocks. When the product of "the total number of indexes of the synchronization signal blocks associated with each of the random access channel opportunities" and the number of random access channel opportunities is different from the number of indexes of the synchronization signal blocks, the control unit associates the indexes of the synchronization signal blocks with each of the random access channel opportunities in a manner that makes the number of random access channel opportunities corresponding to the number of indexes of each synchronization signal block close to the average value.

6. A communication method executed by a terminal, the communication method comprising the following steps: Configure random access channel opportunities for transmitting random access channels; and Based on the defined random access channel opportunity, the random access channel is transmitted. The random access channel opportunities are configured such that the number of random access channel opportunities multiplexed in the frequency direction at a first position in the time direction is different from the number of random access channels multiplexed at a second position in the time direction.

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