Communication device and communication method

Abstract

This communication device comprises: a reception unit that receives a backhaul-link signal from a first communication device by wireless communication; a transmission unit that transmits the received backhaul-link signal to a second communication device different from the first communication device; and a control unit that, on the basis of setting information about the respective numbers of symbols for subcarrier intervals including subcarrier intervals larger than a specified value, assumes the number of symbols overlapping between the signal received from the first communication device and the signal that is to be transmitted to the second communication device.

Description

[Technical Field]

[0001] The present invention relates to a communication device and a communication method in a wireless communication system. [Background technology]

[0002] For NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), technologies that satisfy requirements such as a large-capacity system, high-speed data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption are being considered (for example, Non-Patent Document 1).

[0003] NR Release 17 is considering the use of higher frequency bands than previous releases (e.g., Non-Patent Document 2). For example, in the frequency band from 52.6 GHz to 71 GHz, applicable numerology including subcarrier spacing and channel bandwidth, physical layer design, and expected interference in actual wireless communications are being considered.

[0004] In addition, a wireless communication system using IAB (Integrated Access and Backhaul) nodes is being considered for NR. The IAB node is a communication device for supporting wireless backhaul and relay links, which enables flexible and highly dense deployment of NR cells without the need to densify the wired transport network. The IAB node includes a Mobile Termination (MT) with terminal functionality in the backhaul link and a Distributed Unit (DU) with base station functionality in the access link. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 38.300 V16.6.0(2021-06) [Non-patent document 2] 3GPP TS 38.306 V16.5.0(2021-06) Summary of the Invention [Problem to be solved by the invention]

[0006] To avoid mismatch between MT and DU resources due to propagation delay, IAB nodes must report the number of superimposed symbols to their parent nodes. However, the number of guard symbols configured as the number of superimposed symbols in MAC-CE does not correspond to the large subcarrier spacing supported in high frequency bands, such as 52.6 GHz to 71 GHz, and therefore must be extended.

[0007] The present invention has been made in view of the above points, and has as its object to apply a wireless communication system to a high frequency band. [Means for solving the problem]

[0008] According to the disclosed technology, a radio communication system includes: a receiver that receives a backhaul link signal from a first communication device via wireless communication; a transmitter that transmits the received backhaul link signal to a second communication device different from the first communication device; and a controller that estimates the number of symbols to be superimposed between the signal received from the first communication device and the signal to be transmitted to the second communication device based on setting information of the number of symbols for each subcarrier spacing including a subcarrier spacing greater than a reference value. the setting information includes a setting of a number greater than the number of symbols corresponding to a subcarrier spacing equal to or less than the reference value, and a setting of a number obtained by adding an offset value corresponding to the subcarrier spacing or a frequency band to the number of symbols corresponding to the subcarrier spacing equal to or less than the reference value, A communication device is provided. [Effects of the Invention]

[0009] The disclosed technology provides a technology that enables wireless communication systems to be applied to high frequency bands. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 4 is a diagram illustrating an example of a frequency range according to an embodiment of the present invention. [Figure 3] FIG. 1 is a first diagram illustrating a wireless communication system using IAB nodes. [Figure 4] FIG. 2 is a second diagram for explaining a wireless communication system using IAB nodes. [Figure 5] FIG. 10 is a first diagram for explaining the number of superimposed symbols in an IAB node. [Figure 6] FIG. 10 is a second diagram for explaining the number of superimposed symbols in an IAB node. [Figure 7] FIG. 1 is a first diagram for explaining propagation delay in an IAB node. [Figure 8] FIG. 10 is a second diagram for explaining propagation delay in an IAB node. [Figure 9] FIG. 10 is a diagram illustrating an example of conventional setting of the number of guard symbols. [Figure 10] FIG. 10 is a diagram illustrating an example of conventional subcarrier spacing settings for the number of guard symbols. [Figure 11] FIG. 10 is a diagram illustrating an example of setting the number of guard symbols according to option 1-1 of the first embodiment. [Figure 12] FIG. 10 is a diagram illustrating an example of subcarrier spacing settings according to option 1-1 of the first embodiment. [Figure 13] FIG. 10 is a diagram illustrating an example of setting the number of guard symbols according to option 1-1′ of the first embodiment. [Figure 14] FIG. 10 is a diagram illustrating an example of subcarrier spacing settings according to option 1-2 of the first embodiment. [Figure 15] FIG. 10 is a diagram illustrating an example of subcarrier spacing settings according to options 1-3 of the first embodiment. [Figure 16] FIG. 10 is a diagram illustrating a setting value of the number of guard symbols according to option 1 of the second embodiment. [Figure 17] FIG. 10 is a diagram illustrating a setting value of the number of guard symbols according to option 2 of the second embodiment. [Figure 18] FIG. 10 is a diagram illustrating an offset value of the number of guard symbols according to option 2 of the second embodiment. [Figure 19] FIG. 10 is a diagram illustrating a setting value of the number of guard symbols according to option 3 of the second embodiment. [Figure 20] FIG. 2 is a diagram illustrating an example of a functional configuration of a communication device according to an embodiment of the present invention. [Figure 21] FIG. 2 is a diagram illustrating an example of a hardware configuration of a communication device according to an embodiment of the present invention. [Figure 22] 1 is a diagram showing an example of a configuration of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0012] In operation of the wireless communication system according to the embodiment of the present invention, existing technologies may be used as appropriate. The existing technologies include, but are not limited to, existing NR or LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced (e.g., NR) unless otherwise specified.

[0013] Furthermore, in the embodiments of the present invention described below, terms used in existing LTE, 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. This is for convenience of description, and similar signals, functions, etc. may be referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily designated as "NR-".

[0014] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0015] Furthermore, in the embodiments of the present invention, "configuring" radio parameters and the like may mean that predetermined values ​​are pre-configured, or that radio parameters notified from a base station or a terminal are set.

[0016] (System Configuration) FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, a wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0017] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Furthermore, a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.

[0018] The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, via the NR-PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as an SSB (SS / PBCH block). As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using Carrier Aggregation (CA). Furthermore, the terminal 20 may perform communication via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0019] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals. The terminal 20 may also be referred to as a UE, and the base station 10 may also be referred to as a gNB.

[0020] Fig. 2 is a diagram illustrating an example of a frequency range in an embodiment of the present invention. In the NR specifications of 3GPP Release 15 and Release 16, operation of a frequency band of 52.6 GHz or higher is being considered. As shown in Fig. 2, the currently specified frequency range (FR) 1 is a frequency band from 410 MHz to 7.125 GHz, with a subcarrier spacing (SCS) of 15, 30, or 60 kHz and a bandwidth of 5 MHz to 100 MHz. FR2-1 is a frequency band from 24.25 GHz to 52.6 GHz, with an SCS of 60, 120, or 240 kHz and a bandwidth of 50 MHz to 400 MHz. Furthermore, FR2-2, a newly operated frequency band, is a frequency band from 52.6 GHz to 71 GHz.

[0021] In the newly operated frequency band FR2-2, up to 64 SSB beams may be supported in both licensed and unlicensed bands. In addition, the initial BWP (Bandwidth Part) may support 120 kHz SCS for SSB and 120 kHz SCS for initial access signals and channels.

[0022] In addition to the 120 kHz SCS, an SSB with a 480 kHz SCS may be supported. The SSB may be used to perform initial access supporting the CORESET (Control Resource Set) #0 / Type 0-PDCCH included in the MIB. However, the following restrictions may be imposed. For example, the entry number of the synchronization raster may be restricted. Furthermore, in the case of an SSB with a 480 kHz SCS, only the CORESET #0 / Type 0-PDCCH with a 480 kHz SCS may be supported. Furthermore, SSB-CORESET multiplexing pattern 1 (SS / PBCH block and CORESET multiplexing pattern 1) may be prioritized.

[0023] Unique identification of ANR (Automatic Neighbor Relation) and PCI (Physical Cell Identity) for detecting SSBs of 120 kHz SCS, 480 kHz SCS, and 960 kHz SCS may be supported. Furthermore, CORESET#0 / Type0-PDCCH included in the MIB for SSBs of 120 kHz SCS, 480 kHz SCS, and 960 kHz SCS may be supported. Furthermore, one CORESET#0 / Type0-PDCCH SCS may be supported per SSB SCS. For example, {SSB SCS, CORESET#0 / Type0-PDCCH SCS} may be supported as {120, 120}, {480, 480}, or {960, 960}. Furthermore, SSB-CORESET multiplexing pattern 1 may be prioritized.

[0024] 3 is a first diagram illustrating a wireless communication system using an IAB (Integrated Access and Backhaul) node. The IAB node is a communication device for supporting wireless backhaul and relay links, which enables flexible and highly dense deployment of NR cells without the need to densify the wired transport network. The IAB node includes a Mobile Termination (MT) having terminal functionality in the backhaul link and a Distributed Unit (DU) having base station functionality in the access link.

[0025] In NR Release 16, IAB nodes operate with MT and DU via Time Division Duplex (TDD). IAB nodes are intended to be used in stationary locations.

[0026] 4 is a second diagram for explaining a wireless communication system using IAB nodes. Parent node 30B is a communication device (first communication device) that functions as a base station for the terminal function of the MT of IAB node 30A. Parent node 30B is, for example, a donor node. A donor node is a communication device that does not have a parent node, and includes, for example, a CU (Central Unit) and a DU.

[0027] The DU included in the parent node 30B performs wireless communication with the MT of the IAB node 30A via the backhaul link, and performs wireless communication with the terminal 20 via the access link.

[0028] The child node 30C is a communication device (second communication device) that functions as a terminal with respect to the base station function of the DU of the IAB node 30A. The DU included in the IAB node 30A performs wireless communication with the MT of the child node 30C via a backhaul link, and performs wireless communication with the terminal 20 via an access link.

[0029] 5 is a first diagram for explaining the number of superimposed symbols in an IAB node. The downlink signal that the MT of IAB node 30A receives from parent node 30B and the uplink signal that the DU of IAB node 30A transmits to child node 30C have some symbols superimposed on each other due to propagation delay.

[0030] Fig. 6 is a second diagram for explaining the number of superimposed symbols in an IAB node. As in Fig. 5, the downlink signal that the MT of IAB node 30A receives from parent node 30B and the uplink signal that the DU of IAB node 30A transmits to child node 30C have some symbols superimposed on each other due to propagation delay.

[0031] Therefore, in order to avoid mismatch between the MT resource and the DU resource due to propagation delay, the IAB node 30A needs to report information on the number of superimposed symbols to the parent node 30B.

[0032] In NR, in the case of a cell of an MT provided by an IAB node, a technology is being considered in which the number of symbols (hereinafter referred to as guard symbols) not used by the MT in the slot communicated between the MT and the DU and the setting of the subcarrier spacing for that number of guard symbols are provided to the MT by the guard symbol MAC-CE.

[0033] 7 is a first diagram for explaining the propagation delay in the IAB node. In order to adjust the downlink transmission timing (T0) between the parent node 30B and the IAB node 30A, the IAB node 30A calculates the propagation delay time (T propagetion ) need to be known.

[0034] FIG. 8 is a second diagram for explaining the propagation delay in the IAB node. propagetionis calculated as (TA-Tg) / 2, where TA is the timing gap between the uplink transmit timing and the downlink receive timing at the IAB node 30A, and Tg is the gap between the downlink transmit timing and the uplink receive timing at the parent node 30B to avoid overlap.

[0035] TA and T Δ (Tg / 2) is notified from the parent node 30B to the IAB node 30A. propagetion The IAB node 30A notifies the IAB node 30B of information on the numerical values ​​that are the basis for the calculation of the above.

[0036] Fig. 9 is a diagram showing an example of conventional setting of the number of guard symbols. Specifically, Fig. 9 shows an example of a guard symbol MAC-CE for setting the number of guard symbols that has been previously considered in NR. The guard symbol MAC-CE consists of four octets (8 bits). The first octet consists of a 1-bit item "R", a 5-bit item "ServingCellID", and a 2-bit item "SCS".

[0037] The "R" item is a reserved bit. The value of the "R" item is set to a fixed value of 0. The value of the "ServingCellID" item is the ID of the serving cell to which MAC-CE is applied. The value of the "SCS" item is the subcarrier spacing used as the basis for the guard interval (the interval equivalent to the number of guard symbols). The possible values ​​and contents of the "SCS" item will be described later.

[0038] The second to fourth octets consist of eight 3-bit items "NmbGS*", where * is a value between 1 and 8. The value of each "NmbGS*" item is the number of guard symbols. The number of guard symbols can take values ​​between 0 and 4. Values ​​between 5 and 7 are reserved and cannot be taken.

[0039] Fig. 10 is a diagram showing an example of conventional subcarrier spacing settings for the number of guard symbols. Specifically, Fig. 10 shows the possible values ​​of the "SCS" item in the guard symbol MAC-CE described above, and the content of each value. For example, when the value of the "SCS" item is "11," this indicates that the subcarrier spacing is 120 kHz.

[0040] As shown in Figures 9 and 10, the guard symbol MAC-CE currently under consideration does not specify a subcarrier spacing greater than 120 kHz, which corresponds to the high frequency band of FR2-2. Furthermore, it is expected that the high frequency band of FR2-2 will require a guard symbol count greater than four.

[0041] (Outline of this embodiment) Therefore, in this embodiment, a method for making the guard symbol MAC-CE compatible with the high frequency band of FR2-2 is shown. Specifically, Example 1 shows a method for making the guard symbol MAC-CE compatible with a subcarrier spacing greater than 120 kHz. Also, Example 2 shows a method that enables setting a larger number of guard symbols than conventionally.

[0042] Note that 52.6 GHz is an example of a reference value indicating a high frequency band of FR2-2. This embodiment may be applied to a high frequency band of 71 GHz or higher. Furthermore, 120 kHz is an example of a reference value indicating a large subcarrier spacing. This embodiment may be applied to a subcarrier spacing larger than 960 kHz.

[0043] Example 1 In this embodiment, a method for making the guard symbol MAC-CE correspond to a subcarrier interval greater than 120 kHz is shown.

[0044] <Option 1> The method of specifying the subcarrier interval may be changed from the conventional method.

[0045] <Option 1-1> The reserved bits field included in the first octet of the guard symbol MAC-CE may be used to specify the subcarrier spacing together with the existing subcarrier spacing field.

[0046] Fig. 11 is a diagram showing an example of setting the number of guard symbols according to option 1-1 of the first embodiment. As shown in Fig. 11, the 1-bit item "SCSext" is an extended item for setting the subcarrier spacing. The subcarrier spacing is set as a 3-bit value, with the 1-bit item "SCSext" as the value of the first bit and the 2-bit item "SCS" as the values ​​of the second and third bits.

[0047] 12 is a diagram showing an example of subcarrier spacing settings according to option 1-1 of the first embodiment. It shows the subcarrier spacing for each of the above-mentioned 3-bit values. For example, when the value of the item "SCSext" is 1 and the value of the item "SCS" is "01", it indicates a subcarrier spacing of 480 kHz, which corresponds to the 3-bit value "101" indicating the subcarrier spacing.

[0048] Note that since subcarrier spacing greater than 960 kHz is not planned for FR2-2, the 3-bit value "111" may be regarded as reserved and unavailable. Note that the 3-bit value "111" may also be used, and the subcarrier spacing may be set to 1920 kHz, for example.

[0049] Although the example in which the value of the item "SCSext" is the most significant bit of the value indicating the subcarrier spacing has been exemplified, it may be the least significant bit of the value indicating the subcarrier spacing.

[0050] Option 1-1 may be applied to an existing guard symbol MAC-CE or a new MAC-CE.

[0051] Option 1-1 integrates the larger subcarrier spacing specification into the existing subcarrier spacing, i.e., it does not affect the operation of existing IAB nodes.

[0052] <Option 1-1´> The item "SCSext" in Option 1-1 may be linked to the existing item "SCS".

[0053] 13 is a diagram illustrating an example of setting the number of guard symbols according to option 1-1′ in embodiment 1. The first octet of the guard symbol MAC-CE according to option 1-1′ is composed of a 5-bit item “ServingCellID” and a 3-bit item “SCS.”

[0054] The possible values ​​and contents of the 3-bit item "SCS" are as shown in Figure 12. Option 1-1' applies to the new MAC-CE.

[0055] <Option 1-2> It may be possible to set candidates for subcarrier spacing. Here, the guard symbol MAC-CE item may be the one that has been conventionally considered and shown in Figure 9. Also, the subcarrier spacing setting may be changed from the conventional example shown in Figure 10.

[0056] 14 is a diagram illustrating an example of setting subcarrier spacing according to option 1-2 of embodiment 1. The accurate subcarrier spacing corresponding to SCS_0 to SCS_3 can be set by at least one of the following methods.

[0057] 1. RRC 2. MAC-CE (which may or may not be the same as the guard symbol MAC-CE) 3. DCI 4. Terminal Capability Signaling

[0058] In addition, the terminal capability signaling may indicate support for subcarrier spacing for terminal operation.

[0059] Options 1-2 may be applied to the existing guard symbol MAC-CE or to a new MAC-CE.

[0060] According to Option 1-2, the specification of a larger subcarrier spacing is integrated in addition to the existing subcarrier spacing without changing the conventional MAC-CE items.

[0061] <Options 1-3> A MAC-CE for a larger subcarrier spacing than conventional may be added.

[0062] Here, the guard symbol MAC-CE item may be the one that has been conventionally considered and shown in Fig. 9. Furthermore, the subcarrier spacing setting may be changed from the conventional example shown in Fig. 10.

[0063] Fig. 15 is a diagram showing an example of subcarrier spacing settings according to options 1-3 of the first embodiment. Specifically, Fig. 15 shows possible values ​​of the item "SCS" in the guard symbol MAC-CE described above and the content of each value. For example, when the value of the item "SCS" is "11", this indicates that the subcarrier spacing is 960 kHz. In other words, a larger subcarrier spacing corresponds to the same value as the conventional setting in Fig. 10.

[0064] 15 shows that the subcarrier spacing is set to a range from 120 kHz to 960 kHz, but other settings are also possible. For example, the subcarrier spacing may be set to a range from 240 kHz to 1920 kHz, or the subcarrier spacing may be set to a selection from 120 kHz, 480 kHz, and 960 kHz, and the value of the item "SCS" may be set to "11" to indicate that the subcarrier is reserved.

[0065] <Option 2> The subcarrier spacing may be specified by a specification method including a larger value.

[0066] <Option 2-1> The subcarrier spacing is 2 μ 15 [kHz], μ=0, 1, . . . , 7. This allows subcarrier spacing from 15 kHz to 1920 kHz to be specified.

[0067] <Option 2-2> The subcarrier spacing is 2 μ 15 kHz, μ = 0, 1, . . . , 6. This allows subcarrier spacing from 15 kHz to 960 kHz to be specified. This range supports the subcarrier spacings available in NR, including the higher frequency bands of FR2-2.

[0068] <Option 2-3> The subcarrier spacing is 2 μ 15 [kHz], μ = 3, 5, 6. This allows subcarrier spacings of 120 kHz, 480 kHz, and 960 kHz to be specified. This range supports the subcarrier spacings available in the FR2-2 high frequency band.

[0069] According to this embodiment, the guard symbol MAC-CE can be made to correspond to a subcarrier spacing greater than 120 kHz.

[0070] Example 2 In this embodiment, a method will be described that enables the setting of a larger number of guard symbols than conventionally possible.

[0071] <Option 1> It is also possible to use all eight possible values ​​for the 3-bit number of guard symbols. In this case, the MAC-CE field is not changed. The reserved value shown as the value of the field "NmbGS*" is released.

[0072] 16 is a diagram illustrating the setting value of the number of guard symbols according to option 1 of embodiment 2. The values ​​"101", "110", and "111" of the item "NmbGS*" indicate the numbers of guard symbols of 5, 6, and 7, respectively.

[0073] Option 1 allows more symbols to be set as guard symbols, which is suitable for operation with larger subcarrier spacing.

[0074] <Option 2> An offset value for the number of guard symbols may be introduced.

[0075] 17 is a diagram illustrating the setting values ​​of the number of guard symbols according to option 2 of the second embodiment. The number of guard symbols corresponding to each setting value is a value including x, where x is an offset value of the number of guard symbols. That is, the new number of guard symbols is the value obtained by adding the offset value to the previous number of guard symbols.

[0076] 18 is a diagram illustrating an offset value of the number of guard symbols according to option 2 of the second embodiment. The offset value x may be specified according to the subcarrier spacing, for example. That is, when the subcarrier spacing is 15, 30, 60, or 120 kHz, x=0, and when the subcarrier spacing is 480 kHz or 960 kHz, x=4.

[0077] The offset value x may be specified according to the frequency band, for example, x=0 when the frequency band is FR1 or FR2-1, and x=4 when the frequency band is FR2-2.

[0078] <Option 2-1> The method of specifying the offset value may be selected.

[0079] <Option 2-1-1> The offset value may be defined in the specifications, in which case the offset value may be defined for each subcarrier interval or for each frequency band.

[0080] <Option 2-1-2> The offset value may be configured by the RRC.

[0081] <Option 2-1-3> The offset value may be specified by the MAC-CE.

[0082] <Option 2-1-4> The offset value may be specified by the DCI.

[0083] <Option 2-2> Reserved values ​​may be released. In this case, an offset value may be defined in combination with the definition of the number of guard symbols in option 1 shown in Figure 16. For example, if the NmbGS* value is "111", the number of guard symbols may be "7+x".

[0084] According to option 2, the number of configurable guard symbols can be adjusted depending on the operation.

[0085] <Option 3> A new relationship may be defined between the item (NmbGS*) indicating the number of guard symbols in the MAC-CE and the number of guard symbols.

[0086] 19 is a diagram illustrating the setting value of the number of guard symbols according to option 3 of embodiment 2. The values ​​"000" to "100" of the item "NmbGS*" indicate the number of guard symbols from 5 to 9.

[0087] <Option 3-1> Cases may be defined where the new definition of option 3 is used.

[0088] <Option 3-1-1> The cases in which the new definition of Option 3 is used may be configured by the RRC, MAC-CE or DCI.

[0089] <Option 3-1-2> The new definition of Option 3 may be used under specific conditions. For example, the new definition may be used only in the FR2-2 frequency band. Alternatively, the new definition may be used only for subcarrier spacings of 480 kHz and / or 960 kHz.

[0090] <Option 3-2> Reserved values ​​may be released. In this case, the offset value may be defined in combination with the definition of the number of guard symbols in Option 1 shown in Figure 16. For example, if the NmbGS* value is "111", the number of guard symbols may be "12".

[0091] According to the second embodiment, it is possible to set a larger number of guard symbols than before.

[0092] The method according to this embodiment may be limited to a specific frequency band (for example, FR2-2) or a specific subcarrier spacing (at least one of 480 kHz and 960 kHz subcarrier spacing).

[0093] The method according to this embodiment may be limited to terminals (or IAB nodes having terminal functionality) that have transmitted specific terminal capability signaling. For example, it may be limited to terminals (or IAB nodes having terminal functionality) that have reported supporting operation in the 52.6-71 GHz frequency band. It may also be limited to terminals (or IAB nodes having terminal functionality) that have reported supporting at least one of 480 kHz and 960 kHz subcarrier spacing.

[0094] (Device configuration) Next, a description will be given of an example of the functional configuration of the communication devices (base station 10, terminal 20, IAB node 30A, parent node 30B, and child node 30C) that execute the processes and operations described above. The communication devices include functions for executing the above-described embodiments. However, each communication device may be configured to have only one of the proposed functions of the embodiments.

[0095] Fig. 20 is a diagram showing an example of the functional configuration of a communication device. As shown in Fig. 18, the communication device has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 20 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. The transmitting unit 110 and the receiving unit 120 may be called a communication unit.

[0096] The transmitter 110 has a function of generating a signal to be transmitted to another communication device and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from another communication device and acquiring, for example, information of a higher layer from the received signal. The transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL data, etc. to another communication device. The transmitter 110 also transmits the setting information, etc. described in the embodiments. The transmitter 110 also transmits HARQ-ACK, and the receiver 120 receives the setting information, etc. described in the embodiments.

[0097] The setting unit 130 stores preset setting information and various setting information to be transmitted to other communication devices in a storage device, and reads the information from the storage device as needed. The setting unit 130 also stores various setting information received from other communication devices by the receiving unit 120 in the storage device, and reads the information from the storage device as needed. The setting unit 230 also stores preset setting information.

[0098] The control unit 140 controls the entire communication device, including control related to signal transmission and reception, for example. Note that the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120. Furthermore, the transmitting unit 110 and the receiving unit 120 may be called a transmitter and a receiver, respectively.

[0099] The communication device of the present embodiment may be configured as a communication device shown in each of the following items. Also, the following communication method may be implemented.

[0100] <Configuration of this embodiment> (Section 1) a receiving unit that receives a signal of a backhaul link from a first communication device by wireless communication; a transmitter that transmits the received signal of the backhaul link to a second communication device different from the first communication device; a control unit that estimates the number of symbols to be superimposed between the signal received from the first communication device and the signal to be transmitted to the second communication device based on setting information of the number of symbols for each subcarrier interval including a subcarrier interval larger than a reference value; Communication equipment. (Section 2) the setting information includes information for setting the number of symbols per subcarrier interval equal to or less than the reference value, and information for setting the number of symbols per subcarrier interval greater than the reference value. 2. The communication device according to claim 1. (Section 3) the setting information includes a setting of a number greater than the number of symbols corresponding to a subcarrier spacing equal to or less than the reference value; 3. The communication device according to claim 1 or 2. (Section 4) the setting information includes a setting of a number obtained by adding an offset value according to the subcarrier spacing or a frequency band to the number of symbols corresponding to the subcarrier spacing equal to or less than the reference value; 4. The communication device according to claim 3. (Section 5) receiving a signal on a backhaul link from a first communication device via wireless communication; transmitting the received signal of the backhaul link to a second communication device different from the first communication device; and estimating the number of symbols to be superimposed between the signal received from the first communication device and the signal to be transmitted to the second communication device based on setting information of the number of symbols for each subcarrier interval including a subcarrier interval larger than a reference value. A communication method performed by a communication device.

[0101] Any of the above configurations provides a technology that enables a wireless communication system to be applied to high frequency bands. According to the second term, it is possible to use together information that sets the number of symbols for each subcarrier spacing that is equal to or smaller than a reference value and information that sets the number of symbols for each subcarrier spacing that is larger than the reference value. According to the third term, it is possible to set a number of symbols that is larger than the number of symbols corresponding to a subcarrier spacing that is equal to or smaller than a reference value. According to the fourth term, it is possible to set a number of symbols that is larger than the number of symbols corresponding to a subcarrier spacing that is equal to or smaller than a reference value by using an offset value that corresponds to the subcarrier spacing or frequency band.

[0102] (Hardware configuration) The block diagram ( FIG. 20 ) used to explain the above embodiment shows functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0103] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0104] For example, a communication device according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 21 is a diagram illustrating an example of a hardware configuration of a communication device according to an embodiment of the present disclosure. The communication device described above may be physically configured as a computer including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0105] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the communication apparatus may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0106] Each function in the communication device is realized by loading specified software (programs) onto hardware such as processor 1001, memory device 1002, etc., so that processor 1001 performs calculations, controls communication by communication device 1004, and controls at least one of reading and writing data in memory device 1002 and auxiliary memory device 1003.

[0107] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0108] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the communication device shown in FIG. 20 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0109] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0110] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0111] The communication device 1004 is hardware (transmission / reception device) for communicating 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, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0112] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0113] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0114] The communication device 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), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0115] Fig. 22 shows an example configuration of a vehicle 2001. As shown in Fig. 22, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0116] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), 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.

[0117] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0118] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0119] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing various types of information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information obtained from external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001.

[0120] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0121] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0122] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0123] The communication module 2013 transmits, via wireless communication to an external device, a current signal from the current sensor that is input to the electronic control unit 2010. The communication module 2013 also transmits, via wireless communication to an external device, the rotation speed signals of the front and rear wheels acquired by a rotation speed sensor 2022, the air pressure signals of the front and rear wheels acquired by an air pressure sensor 2023, the vehicle speed signal acquired by a vehicle speed sensor 2024, the acceleration signal acquired by an acceleration sensor 2025, the accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, the brake pedal depression amount signal acquired by a brake pedal sensor 2026, the shift lever operation signal acquired by a shift lever sensor 2027, and the detection signals for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 2028, which are input to the electronic control unit 2010.

[0124] The communication module 2013 receives various information (traffic information, traffic signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The communication module 2013 also stores the various information received from the external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0125] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0126] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0127] Each aspect / embodiment described in the present disclosure may be any of the following: LTE (Long Term Evolution), LTE-Advanced (LTE-A), 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 decimal number)), 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 present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0128] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0129] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0130] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0131] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0132] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0133] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0134] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0135] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0136] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0137] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0138] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0139] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0140] In this disclosure, terms such as "base station (BS)," "radio base station," "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" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0141] 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 smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0142] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0143] A mobile station may also be referred to by those skilled in the art as a 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, handset, user agent, mobile client, client, or some other suitable terminology.

[0144] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the mobile body itself. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0145] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0146] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0147] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0148] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0149] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0150] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0151] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0152] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0153] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0154] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0155] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0156] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0157] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0158] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0159] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0160] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0161] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0162] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0163] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0164] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0165] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0166] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0167] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0168] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0169] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0170] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be set for the terminal 20 within one carrier.

[0171] At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," and the like in this disclosure may be read as "BWP."

[0172] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0173] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0174] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0175] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0176] Although the present disclosure has been described in detail above, it is 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 in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0177] 10 base station 10A satellite 10B Gateway 10C ground base station 10D CN 10E Flying Object 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 30A IAB node 30B Parent node 30C Child Node 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device 2001 Vehicle 2002 Drive unit 2003 Steering Section 2004 accelerator pedal 2005 brake pedal 2006 Shift Lever 2007 front wheel 2008 rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 RPM Sensor 2023 Air Pressure Sensor 2024 Vehicle speed sensor 2025 Acceleration Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driving Assistance Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. a receiving unit that receives a signal of a backhaul link from a first communication device by wireless communication; a transmitter that transmits the received signal of the backhaul link to a second communication device different from the first communication device; a control unit that estimates the number of symbols to be superimposed between the signal received from the first communication device and the signal to be transmitted to the second communication device based on setting information of the number of symbols for each subcarrier spacing including a subcarrier spacing larger than a reference value; the setting information includes a setting of a number greater than the number of symbols corresponding to a subcarrier spacing equal to or less than the reference value, and a setting of a number obtained by adding an offset value corresponding to the subcarrier spacing or a frequency band to the number of symbols corresponding to the subcarrier spacing equal to or less than the reference value; Communication equipment.

2. the setting information includes information for setting the number of symbols per subcarrier interval equal to or less than the reference value, and information for setting the number of symbols per subcarrier interval greater than the reference value. The communication device according to claim 1 .

3. receiving a signal on a backhaul link from a first communication device via wireless communication; transmitting the received signal of the backhaul link to a second communication device different from the first communication device; and estimating the number of symbols to be superimposed between the signal received from the first communication device and the signal to be transmitted to the second communication device based on setting information of the number of symbols for each subcarrier spacing including a subcarrier spacing larger than a reference value; the setting information includes a setting of a number greater than the number of symbols corresponding to a subcarrier spacing equal to or less than the reference value, and a setting of a number obtained by adding an offset value corresponding to the subcarrier spacing or a frequency band to the number of symbols corresponding to the subcarrier spacing equal to or less than the reference value; A communication method performed by a communication device.

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