Communication apparatus and communication method

Abstract

The communication apparatus includes: a control circuit configured to configure a signal of a sidelink communication in a frequency resource satisfying a bandwidth limit related to a frequency band in an unlicensed band; and a transmission circuit that transmits the signal.

Description

Technical Field

[0001] The present disclosure relates to a communication device and a communication method. Background Art

[0002] The expansion of communication systems called "5th Generation Mobile Communication Systems (5G)" has been studied. 3GPP (3rd Generation Partnership Project), an international standardization organization, has studied the advancement of communication systems from two aspects: the advancement of LTE (Long Term Evolution) systems and New Radio (NR). For example, as communication capacity increases, 3GPP has studied the use of unlicensed bands in addition to the use of licensed bands.

[0003] Prior art literature

[0004] Non-patent literature

[0005] Non-patent document 1: 3GPP, TR 38.885 V16.0.0, "Study on NR Vehicle-to-Everything (V2X)"

[0006] Non-patent document 2: RP-201385, “WID revision: NR sidelink enhancement,” LG Electronics, June 29-July 3, 2020

[0007] Non-patent document 3: RP-213678, “New WID on NR sidelink evolution,” OPPO, LG Electronics, Dec. 6-17, 2021

[0008] Non-patent document 4: 3GPP, TS 37.213 V17.1.0, “Physical layer procedures for shared spectrum channel access,” Summary of the invention

[0009] However, there is still room for research on resource allocation in the frequency direction in the unlicensed band.

[0010] The non-limiting embodiments of the present disclosure contribute to providing a communication device and a communication method capable of appropriately performing resource allocation in the frequency direction in an unlicensed band.

[0011] A communication device according to an embodiment of the present disclosure includes: a control circuit configured to configure a signal for sidelink communication in a frequency resource satisfying a bandwidth restriction associated with the frequency band in an unlicensed band; and a transmission circuit configured to transmit the signal.

[0012] It should be noted that these general or specific aspects may be implemented by a system, an apparatus, a method, an integrated circuit, a computer program or a recording medium, or may be implemented by any combination of systems, apparatuses, methods, integrated circuits, computer programs and recording media.

[0013] According to an embodiment of the present disclosure, resources in the frequency direction can be appropriately configured in an unlicensed band.

[0014] Further advantages and effects of one embodiment of the present disclosure will be clearly presented in the specification and the drawings. These advantages and / or effects are provided by several embodiments, and the features described in the specification and the drawings, respectively, but not necessarily all of them need to be provided in order to obtain one or more of the same features. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of the configuration of PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel) and PSFCH (Physical Sidelink Feedback Channel) in a time slot.

[0016] Figure 2 This is a diagram showing an example of regulations related to the frequency of unlicensed band signals.

[0017] Figure 3 This is a diagram showing an example of interleaving allocation.

[0018] Figure 4A This is a block diagram showing a configuration example of a part of a base station.

[0019] Figure 4B This is a block diagram showing a configuration example of a part of a terminal.

[0020] Figure 5 This is a diagram showing an example of the configuration of an S-SS / PSBCH (Sidelink-Synchronization Signal / Physical Sidelink Broadcast Channel) block in Action Example 1-1 of Implementation Example 1.

[0021] Figure 6 This is a diagram showing an example of the configuration of S-SS / PSBCH blocks in operation example 1-2 of implementation example 1.

[0022] Figure 7 This is a diagram showing an example of the configuration of S-SS / PSBCH blocks in operation example 1-3 of implementation example 1.

[0023] Figure 8 This is a block diagram showing the structure of a terminal according to the first embodiment.

[0024] Fig. 9 This is a diagram showing an example of a subchannel in operation example 2-1 of implementation example 2.

[0025] Fig.10 This is a diagram showing an example of subchannels in operation example 2-2 of the second embodiment.

[0026] Fig.11 This is a diagram showing a first example of allocation in Action Example 2-3 of Implementation Example 2.

[0027] Fig.12 This is a diagram showing a second example of allocation in Action Example 2-3 of Implementation Example 2.

[0028] Fig.13 This is a block diagram showing the structure of a terminal according to the second embodiment.

[0029] Fig.14 This is a diagram showing a configuration example in action example 3-1 of implementation mode 3.

[0030] Fig.15 This is a diagram showing an example of allocation in Action Example 3-2 of Implementation Example 3.

[0031] Fig.16 is a diagram of an exemplary architecture of a 3GPP NR system.

[0032] Fig.17 It is a schematic diagram showing the functional separation between NG-RAN (Next Generation-Radio Access Network) and 5GC (5th Generation Core).

[0033] Fig.18 This is a sequence diagram of the process of setting up / resetting an RRC (Radio Resource Control) connection.

[0034] Fig.19It is a schematic diagram showing the utilization scenarios of large-capacity high-speed communications (eMBB: enhanced Mobile Broadband), multiple simultaneous machine-type communications (mMTC: massive Machine Type Communications) and high-reliability and ultra-low latency communications (URLLC: Ultra Reliable and Low Latency Communications).

[0035] Fig. 20 is a block diagram representing an exemplary 5G system architecture for non-roaming scenarios. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0037] [Vehicle to X (V2X) wireless communication technology]

[0038] The expansion of the communication system called "5th Generation Mobile Communication System (5G)" has been studied. In 5G, the flexible provision of functions for various use cases requiring increased communication services, increased number of connected terminals, high reliability and low latency has been studied.

[0039] 3GPP (3rd Generation Partnership Project), an international standards organization, has studied the advancement of communication systems from two aspects: the advancement of LTE (Long Term Evolution) systems and new radio (NR). 3GPP has previously studied the support of V2X (vehicle wireless communication technology) in the LTE system. It has also studied the support of V2X in NR, which can use a wider band than LTE (for example, refer to non-patent document 1).

[0040] In addition, further expansion of communication using not only V2X but also sidelink is being studied (for example, refer to Non-Patent Document 2). V2X envisions communication between vehicles (V2V: Vehicle to Vehicle), between vehicles and infrastructure (V2I: Vehicle to Infrastructure), between vehicles and pedestrians (V2P: Vehicle to Pedestrian), and between vehicles and networks (V2N: Vehicle to Network).

[0041] In V2V, V2I, and V2P, terminals can directly send and receive signals using a sidelink (SL) or a link called "PC5" without going through a network with a base station (for example, a network via a base station). In V2N, communication is envisioned via a link called "Uu" between a base station and a terminal. It should be noted that a base station can be called a "gNB" in NR and an "eNB" in LTE.

[0042] In addition, the use of sidelink communication in an unlicensed band is also being studied (for example, see Non-Patent Document 3).

[0043] [NR Sidelink]

[0044] In the NR sidelink, unicast, multicast, and broadcast are supported in transmission and reception. As unicast, a one-to-one transmission from a transmitting terminal (e.g., recorded as "Tx UE") to a receiving terminal (e.g., recorded as "Rx UE") is envisioned. As multicast, transmission from a transmitting terminal to one or more receiving terminals included in a certain group is envisioned. As broadcast, transmission from a transmitting terminal to an uncertain receiving terminal is envisioned.

[0045] In the sidelink of NR, a control signal called "SCI (Sidelink control information)" is sent and received. SCI can also be called "control information". SCI is divided into first-stage SCI and second-stage SCI. The first-stage SCI is configured on the PSCCH (physical sidelink control channel). The second-stage SCI is configured on at least a part of the PSSCH (physical sidelink shared channel) that transmits and receives data. By dividing the SCI into two, the number of bits and size of the first-stage SCI can be reduced. In the sidelink, a terminal (for example, terminal A) has the following function, namely, receiving the PSCCH sent from other terminals different from terminal A, and after grasping the resource utilization status of other terminals, determining the resources for terminal A to send. This function is also called "sensing".

[0046] In addition, in the sidelink, signals are transmitted and received in the following channels.

[0047] -PSCCH (Physical Sidelink Control Channel): The first stage SCI (Sidelink Control Information) is configured in the PSCCH.

[0048] -PSSCH (Physical Sidelink Shared Channel): Data signals and the second stage SCI are configured in the PSSCH.

[0049] -PSFCH (Physical Sidelink Feedback Channel): A feedback signal for PSSCH is configured in PSFCH. The feedback signal represents, for example, ACK (Acknowledgement) or NACK (negative Acknowledgement), where ACK indicates successful reception of PSSCH and NACK indicates unsuccessful reception of PSSCH. The feedback signal can be applied to situations where PSSCH is unicast and multicast. In addition, after Release 17 (Rel.17: Release 17), for Inter-UE coordination, PSFCH is sometimes sent when a conflict is detected.

[0050] -PSBCH (physical SL broadcast channel): A broadcast signal is configured in the PSBCH. The SBCH is sent together with a synchronization signal. The synchronization signal is, for example, a sidelink primary synchronization signal (S-PSS: sidelink Primary synchronization signal) and / or a sidelink secondary synchronization signal (S-SSS: sidelink secondly synchronization signal). The SBCH sent together with the synchronization signal is also collectively referred to as an "S-SSB (sidelink synchronization signal block)".

[0051] It should be noted that the signal received and transmitted in the sidelink may also be referred to as a "sidelink signal". In addition, for example, "transmission of information (or, signal) configured on the PSCCH" is sometimes referred to as "transmission of the PSCCH" below. In addition, in the following description, the PSCCH may refer to a resource defined as the PSCCH, or may refer to information (or, signal) configured on a resource defined as the PSCCH. Other channels other than the PSCCH are sometimes referred to as the PSCCH.

[0052] Figure 1 This is a diagram showing an example of the configuration of PSCCH, PSSCH, and PSFCH within a time slot. Figure 1 The horizontal axis represents the time axis, and the vertical axis represents the frequency axis in PRB (physical resource block) units. Figure 1 , two examples, example (a) and example (b), are shown.

[0053] It should be noted that, as shown in example (a), PSFCH may be configured. Alternatively, as shown in example (b), PSFCH may not be configured depending on the setting. When PSFCH is not configured, the area of ​​PSSCH can be increased.

[0054] The number of code elements of the sidelink signal in the time slot can be changed according to the setting. In addition, the configuration of the second-stage SCI is changed according to the configuration of the DMRS (Demodulation Reference Signal) of the PSSCH (not shown). The first-stage SCI is configured starting from the lowest frequency resource among the frequency resources allocated to the PSSCH. In the code elements before the leading code elements of the PSCCH and PSSCH, copies of the leading code elements of the PSCCH and PSSCH are configured for AGC (Auto gain control). In addition, as shown in example (a), a copy of the PSFCH is also configured before the code element of the PSFCH for AGC.

[0055] In addition, for example (a), a gap for switching between transmission and reception is configured in the interval between PSSCH and PSFCH and in the interval after the last symbol of PSFCH. For example (b), a gap for switching between transmission and reception is configured in the interval after the last symbol of PSSCH. The gap may be equivalent to an interval in which no signal is transmitted or received.

[0056] NR's sidelink communication has two modes called "Mode 1" and "Mode 2". In Mode 1, the base station determines the resources used by the terminal in the sidelink. In Mode 2, the terminal determines the resources used in the sidelink from the resources in a predetermined resource pool. It is assumed that Mode 1 is used in an environment where the base station and the terminal are connected and the terminal communicating in the sidelink can receive instructions from the base station. Regarding Mode 2, the terminal can send in the sidelink even without instructions from the base station. Therefore, terminals under different operators and / or terminals outside the coverage of the base station can communicate in the sidelink.

[0057] The resources used for the sidelink are set according to the SL BWP (sidelink Band width part) and the resource pool. The SL BWP specifies the frequency band that can be used for the sidelink, and is set separately from the DL BWP (downlink Band width part) and UL BWP (uplink Band width part) set between the base station and the terminal (Uu). However, at least a part of the frequency band that can be used for the sidelink may overlap with the UL BWP. In the resource pool, resources in the frequency / time direction are specified as resources within the SL BWP. Multiple resource pools can also be set for one terminal. The frequency resources in the resource pool are divided into sub-channel units, and the allocation of resources can be set in sub-channel units. In a sub-channel, multiple PRBs (Physical resource blocks) are included. PSSCH can be allocated in units of sub-channels that are a collection of multiple PRBs.

[0058] [Background NR-U]

[0059] As communication capacity increases, 3GPP is also studying the use of unlicensed bands in addition to the licensed bands. NR using unlicensed bands is also called "NR-U (unlicensed)". In NR-U, new and expanded actions are added to ensure fairness when mixed with other devices such as LAA (Licensed Assisted Access) based on Wifi (registered trademark) and / or LTE.

[0060] In the unlicensed band, in order to ensure fairness with other devices, the communication device (for example, the base station or terminal of NR-U) implements LBT (Listen Before Talk) and starts sending after confirming that other devices are not sending signals nearby. LBT can also be replaced by other expressions such as "carrier sensing" or "sensing". The communication device implements LBT, and after confirming that other devices are nearby and are not sending signals nearby, it sets the channel occupancy time, namely COT (Channel Occupancy Time). Within the COT, the communication device can send and receive signals in DL (downlink) resources and UL (uplink) resources.

[0061] There are two application methods related to LBT. The first application method is LBE (Load Based Equipment). For LBE, the communication device implements Type 1 LBT (Type 1 LBT) (also called "category 4 LBT") when obtaining COT. In addition, in addition to the front end of COT, the communication device can implement Type 2 LBT (Type 2 LBT) and can start sending after implementation.

[0062] It should be noted that in the following description, a communication device (eg, a base station or a terminal) "starts transmitting after implementing LBT", which is equivalent to the communication device implementing LBT and starting transmitting after confirming that other devices are transmitting signals nearby.

[0063] Table 1 shows an example of a sensing interval of LBT for obtaining a transmission right in LBE and an applied interval.

[0064] [Table 1]

[0065]

[0066] In the LBT of type 1, each parameter related to LBT is set according to the setting of the channel access priority class. Table 2 shows an example of the setting of each parameter shown in non-patent document 4. Table 2 shows the correspondence between the channel access priority class and each parameter.

[0067] [Table 2]

[0068]

[0069] Terminal (an example of a communication device) at 16+9*m p Carrier monitoring is repeatedly performed between the sensing interval of and the sensing interval of 9*N, and transmission can be started when it is confirmed that the channel is idle. In addition, sometimes the state in which the channel is idle is called the "idle state", and the state in which the channel is not idle (for example, the state in which the channel is being used) is called the "busy state". Confirmation that the channel is idle can be confirmation that other devices are not sending signals. In addition, the sensing interval can also be replaced by other expressions such as "sensing time", "carrier monitoring interval", etc.

[0070] Whenever the channel is confirmed to be idle, the value of N is decremented by 1 (counted down). When the channel is in use (busy), the countdown of N is paused. pIn the interval, after the channel is idle, count down again. The initial value of N is randomly selected from 0 to CW_p. CW_p is selected from the allowed CW_p sizes. The initial value of CW_p is CW_(min, p). When a communication error exceeding the prescribed value occurs due to a collision in the previous transmission, the value of CW_p increases by 1 level. For example, in the case of channel access priority class p=1, CW_p=CW_(min, p), according to Table 2, CW_p=3. In this case, the initial value of N is randomly set from 0 to 3, that is, from {0, 1, 2, 3}. For example, the sensing intervals when the initial values ​​of N are 0, 1, 2, and 3 are 25μs, 34μs, 43μs, and 52μs, respectively.

[0071] For Type 2A, when the interval between two resources that are consecutive in time is 25μs, the terminal implements LBT within 25μs. When the transmission of other devices is not confirmed in LBT, the terminal can start sending. For Type 2B, when the interval between two resources that are consecutive in time is 16μs, the terminal implements LBT within 16μ. The terminal can start sending without confirming the transmission of other devices. For Type 2C, when the interval between two resources that are consecutive in time is less than 16μs, the terminal can start sending without performing LBT. In addition, as an exception, for the transmission of DRS (Discovery reference signal), because the transmission time of DRS is short, Type 2A LBT can be implemented instead of Type 1 LBT, and transmission can be started.

[0072] Type 1 LBT, Type 2A LBT, Type 2B LBT, and Type 2C LBT are examples of sensing methods for checking the idle state of a channel. As described above, the sensing interval is defined according to the sensing method.

[0073] The second application method is FBE (Frame Based Equipment). FBE is an application that assumes that other devices such as Wifi are not set up in the same space, fixes the frame period and implements LBT at the front end of the frame to obtain COT. For FBE, COT can only be obtained from the front end of the frame period (Fixed Frame Period). In addition, for FBE, it is stipulated that a non-transmission interval (idle period) of more than 5% is set according to the frame period.

[0074] In each of the following embodiments, an example is shown in which sidelink communication is performed in an unlicensed band.

[0075] In the sidelink communication in the authorized band, PSCCH is transmitted in consecutive PRBs. In addition, PSSCH is also transmitted in consecutive PRBs. When PSCCH and PSSCH are transmitted in the same symbol, PSCCH is allocated to PRBs with lower PRB numbers, and PSSCH is allocated to PRBs not used by PSCCH among PRBs allocated to PSSCH. The size of PSCCH is set to one of 10, 12, 15, 20, and 25 PRBs, and the size of PSCCH is set by resource pool. From the subchannel sizes of 10, 12, 15, 20, 25, 50, 75, and 100, PSSCH is set by resource pool, and the subchannel position and number of resources to which PSSCH is allocated are specified in PSCCH.

[0076] There is a regulation of ETSI (ETSI EN 301 893 V2.1.1 (2017-05)) that in the unlicensed band, the occupied channel bandwidth (OCB) satisfies 80% to 100% of the nominal channel bandwidth (NCB). Hereinafter, the regulation that OCB satisfies more than 80% of NCB is recorded as "OCB regulation". When the OCB regulation is satisfied, the signal of the unlicensed band is transmitted using a frequency of more than 80% of the frequency band of NCB.

[0077] It should be noted that, although the OCB requirement is that OCB satisfies 80% or more of NCB below, the present disclosure is not limited thereto. The OCB requirement that OCB satisfies 80% or more of NCB is an example of bandwidth restriction related to frequency band.

[0078] Figure 2 This is a diagram showing an example of regulations related to the frequency of unlicensed band signals. Figure 2 "OCB 80%" means that OCB is 80% or more of the frequency band of NCB. In addition, in the following figures, "OCB 80%" also means that OCB is 80% or more of the frequency band of NCB.

[0079] like Figure 2 As shown, more than 80% of the NCB frequency band may be continuously used to transmit unlicensed band signals, or the unlicensed band signals may be configured so that the widths of the divided multiple resources at both ends on the frequency axis reach more than 80% of the NCB frequency band.

[0080] In NR-U and LAA, interlace allocation is introduced to meet the OCB regulations in the frequency domain.

[0081] Table 3 shows an example of the relationship between SCS (subcarrier spacing) and interleaving. Figure 3 is a diagram showing an example of interleaving allocation. In Table 3, M represents the number of interleavings, and N represents the number of PRBs. Figure 3 In the figure, it indicates the interleaving allocation when the SCS is 30kHz. For the interleaving allocation of NR-U, as shown in Table 3 and Figure 3 As shown, for example, when the SCS is 30 kHz, there are five (M=5) interlaces in the 20 MHz band, and the number of PRBs (N PRBs) of one interlace is 10 or 11.

[0082] [Table 3]

[0083] SCS M NPRBS 15kHz 10 10 or 11 30kHz 5 10 or 11

[0084] There is still room for research on resource allocation that satisfies the above-mentioned OCB regulations for sidelink communication in the unlicensed band. For example, research on setting the resource allocation of sidelink communication signals to an appropriate resource allocation that satisfies the OCB regulations is not sufficient.

[0085] Therefore, in one non-limiting embodiment of the present disclosure, a method for appropriately allocating resources in the frequency direction in an unlicensed band is described.

[0086] For example, in each of the following embodiments, in the unlicensed band, the sidelink signal is distributed and arranged on the frequency axis and transmitted. This satisfies the above-mentioned OCB regulations and enables appropriate resource allocation.

[0087] It should be noted that, although the sidelink communication is exemplified in each of the embodiments described below, the present disclosure is not limited to the sidelink communication. In addition, although the unlicensed band is exemplified in each of the embodiments described below, the present disclosure is not limited to the unlicensed band.

[0088] [Overview of Communication System]

[0089] A communication system according to an embodiment of the present disclosure includes a base station 100 and a terminal 200 .

[0090] Figure 4A 1 is a block diagram showing a configuration example of a part of the base station 100. Figure 4AIn the base station 100 shown, the control unit 102 controls the communication via the link called "Uu" between the terminal 200 and the base station 100. The wireless transceiver 101 transmits a signal via the link called "Uu" under the control of the control unit 102. In addition, the control unit 102 may also perform control related to sidelink communication between multiple terminals (for example, determining resources in mode 1).

[0091] Figure 4B 2 is a block diagram showing a configuration example of a part of the terminal 200. Figure 4B In the terminal 200 (an example of a "communication device") shown, the control unit 220 (e.g., corresponding to the control circuit) configures the signal of the sidelink communication in the frequency resource that satisfies the bandwidth restriction related to the frequency band in the unlicensed band. In addition, the wireless transceiver unit 221 (e.g., corresponding to the transmission circuit) transmits the signal. It should be noted that the signal of the sidelink communication can be at least one of a synchronization signal, a broadcast signal, a data signal, a control signal, and a feedback signal. In addition, the bandwidth restriction related to the frequency band can be, for example, equivalent to the provisions of the above-mentioned OCB, or it can be equivalent to a restriction different from the provisions of the above-mentioned OCB.

[0092] (Implementation Method 1)

[0093] In the first embodiment, an example is described in which, when a terminal transmits a synchronization signal and / or a broadcast signal in an unlicensed band, the synchronization signal and / or the broadcast signal is dispersed on the frequency axis and transmitted to meet the OCB regulation.

[0094] The S-PSS / S-SSS, which is a synchronization signal for the sidelink, and the broadcast signal (e.g., PSBCH) are transmitted in the same time slot. The S-PSS / S-SSS and the broadcast signal (e.g., PSBCH) are collectively referred to as an "S-SS / PSBCH block." In addition, in the following description, the "synchronization signal" may also include a synchronization signal and a broadcast signal.

[0095] In the authorized band, the S-SS / PSBCH block is configured on 132 consecutive subcarriers (hereinafter, the 132 subcarriers are sometimes recorded as indexes #0 to #131). The position of the subcarrier with index #66 is set according to the high-level setting or a predetermined parameter, namely sl-AbsoluteFrequencySSB, and determines the frequency position of the S-SS / PSBCH block.

[0096] 132 subcarriers correspond to 11 consecutive PRBs. The terminal does not transmit PSCCH and / or PSSCH in the time slot in which the S-SS / PSBCH block is transmitted. In addition, below, PSCCH and / or PSSCH may be described as "PSCCH / PSSCH" or "PSSCH / PSCCH".

[0097] The sl-AbsoluteFrequencySSB is selected based on the position of the frequency interval called the "Synchronization raster", which can be identified by the GSCN (Global Synchronization Channel Number), so that the synchronization signal can be detected when the terminal is powered on or loses synchronization.

[0098] In the case where the allocation of S-SS / PSBCH blocks in the licensed band is directly applied to the unlicensed band, for example, when the SCS is 30kHz and the 20MHz band is used, transmission is performed only in 11 of the 51 PRBs. When transmission is performed only in 11 of the 51 PRBs, there is a problem that Figure 2 The problem of the provisions of the OCB illustrated.

[0099] In NR-U, GSCN is set at the frequency n46 and the frequency n96, but the position set by GSCN is an absolute position relative to the band. Therefore, for example, depending on the setting of the 20MHz band used, the relative position from the position of PRB#0 will be different.

[0100] Table 4 shows an example of the position of the SS / PSBCH block. Table 4 shows the range of the GSCN for the frequencies of n46 and n96. As shown in Table 4, the position of the SS / PSBCH block can also be limited to the number shown in the note (NOTE) in the GSCN. In n46 and n96, one GSCN is set for each 20Hz band, but because the position set by the GSCN is an absolute position relative to the band, for example, depending on the setting of the 20MHz band used, the relative position from the position of PRB#0 will be different.

[0101] [Table 4]

[0102]

[0103] Note 3: The following GSCNs are allowed to operate in band n46:

[0104] GSCN=8996,9010,9024,9038,9051,9065,9079,9093,9107,9121,9218,9232,9246,9260,9274,92 88,9301,9315,9329,9343,9357,9371,9385,9402,9416,9430,9444,9458,9472,9485,9499,9513.

[0105] Note 4: The following GSCNs are allowed to work in band n96:

[0106] GSCN=9548,9562,9576,9590,9603,9617,9631,9645,9659,9673,9687,9701,9714,9728,9742,9 756,9770,9784,9798,9812,9826,9840,9853,9867,9881,9895,9909,9923,9937,9951,9964,997 8,9992,10006,10020,10034,10048,10062,10076,10090,10103,10117,10131,10145,10159,10173,10187,10201,10214,10228,10242,10256,10270,10284,10298,10312,10325,10339,10353.

[0107] As described above, when the allocation of S-SS / PSBCH blocks in the licensed band is applied to the unlicensed band, the allocation of S-SS / PSBCH blocks may not meet the OCB regulations. Therefore, in the first embodiment, according to the following operation example, S-SS / PSBCH blocks are distributed on the frequency axis to meet the OCB regulations.

[0108] [Action Example 1-1]

[0109] The following example is shown in this action example 1-1, that is, the S-SS / PSBCH block of the side link is sent at the position set according to the sl-AbsoluteFrequencySSB, and the S-SS / PSBCH block or a part of the S-SS / PSBCH block is additionally sent at a position different from the position set according to the sl-AbsoluteFrequencySSB, thereby satisfying the OCB regulations.

[0110] In this action example 1-1, the frequency position specified by sl-AbsoluteFrequencySSB can also be shared with the GSCN value of the AbsoluteFrequencySSB used in the Uu link between the base station and the terminal.

[0111] Figure 5 1 is a diagram showing an example of the configuration of the S-SS / PSBCH blocks in operation example 1-1 of the first embodiment. Figure 5 (1), (2) and (3) show examples of the configuration of S-SS / PSBCH blocks on the frequency axis. Figure 5 The vertical axes of (1), (2) and (3) represent frequency axes.

[0112] For example, in action example 1-1, Figure 5 As shown in (1), in addition to the S-SS / PSBCH block ( Figure 5 In addition to the "S-SS / PSBCH block (first)" of Figure 5 The "S-SS / PSBCH block (second)" of the OCB is satisfied. Figure 5 Similarly, the S-SS / PSBCH block configured according to sl-AbsoluteFrequencySSB is recorded as "S-SS / PSBCH block (first)", and the S-SS / PSBCH block transmitted additionally is recorded as "S-SS / PSBCH block (second)" or "S-SS / PSBCH block (third)". Figure 5 As shown in (1), (2), and (3), sl-AbsoluteFrequencySSB, for example, indicates the center position of the S-SS / PSBCH block (first) in the frequency direction. In other words, the S-SS / PSBCH block (first) is configured in the frequency direction in a band centered on the position indicated by sl-AbsoluteFrequencySSB.

[0113] The S-SS / PSBCH block (second) may be the same signal as the S-SS / PSBCH block (first), or may be a signal in which the PRBs of the S-SS / PSBCH block (first) are arranged in reverse order, or may be a signal in which a portion of the S-SS / PSBCH block (first) is copied. The S-SS / PSBCH block (second) may also be arranged from the edge of the band of the NCB.

[0114] In addition, for example, in action example 1-1, Figure 5As shown in (2), even if an S-SS / PSBCH block (second) is additionally transmitted in addition to the S-SS / PSBCH block (first) set according to sl-AbsoluteFrequencySSB, if the provisions of OCB are still not met, an S-SS / PSBCH block (second) may be additionally transmitted. Figure 5 "S-SS / PSBCH block (third)".

[0115] The S-SS / PSBCH block (third) can also be configured at the edge of the frequency on the opposite side of the S-SS / PSBCH block (second) on the frequency axis. For example, when the SCS is 30kHz and the band is a 20MHz band, the NCB contains 51 PRBs. When the frequency position of the S-SS / PSBCH block pre-assigned according to the GSCN is PRB#10 to PRB#21, even if the S-SS / PSBCH block is configured in a PRB with a larger frequency number (for example, PRB#39 to PRB#50), the OCB regulations cannot be met. Therefore, the OCB regulations are met by sending the S-SS / PSBCH block (third).

[0116] In addition, for example, in action example 1-1, Figure 5 As shown in (3), in addition to the S-SS / PSBCH block (first) set according to sl-AbsoluteFrequencySSB, the S-SS / PSBCH block (second) and the S-SS / PSBCH block (third) can also be additionally sent regardless of the position of setting the S-SS / PSBCH block (first).

[0117] It should be noted that the S-SS / PSBCH block (second) and the S-SS / PSBCH block (third) may be a signal obtained by copying at least a portion of the signal of the S-SS / PSBCH block, such as the same signal as the DMRS (demodulation reference signal) of the PSBCH block, or may be a signal in which the arrangement (arrangement order) of at least a portion of the signal of the S-SS / PSBCH block is changed. In addition, the number of PRBs of the S-SS / PSBCH block (second) and the S-SS / PSBCH block (third) may be set to 11 PRBs, or may be a number less than 11 PRBs such as 1 PRB or 2 PRBs. In addition, the total size of the S-SS / PSBCH block (second) and the S-SS / PSBCH block (third) may be set to 11 PRBs, or the S-SS / PSBCH block (second) and the S-SS / PSBCH block (third) may be combined to send the same signal as the S-SS / PSBCH block (first).

[0118] As described above, in action example 1-1, even if the transmission of the S-SS / PSBCH block set only according to the sl-AbsoluteFrequencySSB does not satisfy the provisions of the OCB, the provisions of the OCB can be satisfied by additionally sending a signal. In addition, the position of the additionally sent signal (for example, the S-SS / PSBCH block (second)) can be a position set according to a fixed value, a position determined by a resource pool, or notified by the S-SS / PSBCH block (first).

[0119] [Action Example 1-2]

[0120] Figure 6 1 is a diagram showing an example of the configuration of the S-SS / PSBCH block in operation example 1-2 of the first embodiment. Figure 6 (1) and (2) show examples of the configuration of S-SS / PSBCH blocks on the frequency axis. Figure 6 The vertical axis of (1) and (2) represents the frequency axis.

[0121] In this action example 1-2, if Figure 6 As shown, in the unlicensed band of the side link, the OCB regulation is met by the position of the S-SS / PSBCH block (first) set according to sl-AbsoluteFrequencySSB and the additionally transmitted S-SS / PSBCH block (second).

[0122] In this action example 1-2, the position of the S-SS / PSBCH block specified by sl-AbsoluteFrequencySSB can also be set to a value different from the value of GSCN set by the AbsoluteFrequencySSB used by the S-SS / PSBCH block of the Uu link.

[0123] As described above, in action example 1-2, the position of the S-SS / PSBCH block set according to sl-AbsoluteFrequencySSB is set to one end in the frequency direction, and the position of the additionally transmitted S-SS / PSBCH block is set to the other end in the frequency direction, thereby satisfying the provisions of OCB. In addition, by setting it to a position different from the synchronization signal of the Uu link, mutual interference can be prevented.

[0124] In addition, if Figure 6 As shown in (1), the additionally transmitted S-SS / PSBCH block (second) may also have the same size as the S-SS / PSBCH block (first). In this case, the additionally transmitted S-SS / PSBCH block (second) may also be a copy of the S-SS / PSBCH block (first). Figure 6As shown in (2), the size of the additionally transmitted S-SS / PSBCH block (second) may also be different from that of the S-SS / PSBCH block (first). In this case, the additionally transmitted S-SS / PSBCH block (second) may also be a copy of a portion of the S-SS / PSBCH block (first). Alternatively, Figure 6 The additionally transmitted S-SS / PSBCH block (second one) of (2) can also be transmitted with Figure 5 The S-SS / PSBCH block (second one) shown in (3) is defined in the same manner.

[0125] [Action Example 1-3]

[0126] Figure 7 1 is a diagram showing an example of the configuration of the S-SS / PSBCH block in operation example 1-3 of the first embodiment. Figure 7 In FIG. 1 , an example of the configuration of the S-SS / PSBCH block on the frequency axis is shown. In addition, Figure 7 The vertical axis represents the frequency axis.

[0127] In this action example 1-3, if Figure 7 As shown, the S-SS / PSBCH block is sent in the interleave. The interleave used can also be specified according to the number of PRBs. For example, for a resource of 11 PRBs, it can also be specified that the S-SS / PSBCH block is sent in interleave #0. In this case, the same signal as the S-SS / PSBCH block of the authorized band sent in 11 PRBs is allocated to the interleaved PRB. In addition, when the protection band is set according to the frequency band for implementing LBT, it is possible that the number of PRBs is not 51 PRBs even if the frequency band for implementing LBT is 20 MHz. At this time, when 11 PRBs cannot be ensured in one interleave, two interleave numbers can be used to send the S-SS / PSBCH block. In addition, the interleaving configuration can be the same configuration as that of PSCCH / PSSCH, or it can be a different configuration.

[0128] [Structure of Terminal 200]

[0129] Figure 8 This is a block diagram showing the structure of terminal 200 according to the first embodiment. Figure 8The terminal 200 shown includes a receiving unit 201, an LBT carrier sensing unit 202, a demodulation unit 203, an error correction decoding unit 204, a synchronization signal setting unit 205, a signal distribution unit 206, an error correction coding unit 207, a modulation unit 208, and a transmission unit 209. In addition, the LBT carrier sensing unit 202, the demodulation unit 203, the error correction decoding unit 204, the synchronization signal setting unit 205, the signal distribution unit 206, the error correction coding unit 207, and the modulation unit 208 may be included in the control unit 220. In addition, the receiving unit 201 and the transmission unit 209 may be equivalent to Figure 4B The wireless transceiver unit 221 is shown.

[0130] In the sidelink communication, the terminal 200 may be a transmitting terminal that transmits a sidelink signal, or may be a receiving terminal that receives a sidelink signal.

[0131] The receiving unit 201 receives the received signal via the antenna and performs receiving processing such as down-conversion on the received signal. The received signal is, for example, a sidelink signal including PSSCH and / or PSCCH. It should be noted that the sidelink signal may also include PSFCH. In addition, the sidelink signal may also include a synchronization signal and / or a broadcast signal. In addition, the received signal received by the receiving unit 201 may include a non-transmission interval and may also include signals other than the sidelink signal. The receiving unit 201 outputs the received signal after the receiving processing to the demodulation unit 203 and the LBT carrier monitoring unit 202.

[0132] The demodulation unit 203 performs a demodulation process on the received signal and outputs a demodulated signal obtained by performing the demodulation process to the error correction decoding unit 204 .

[0133] The error correction decoding unit 204 decodes the demodulated signal output from the demodulation unit 203 and outputs it as received data. In addition, the error correction decoding unit 204 outputs a higher layer control signal related to the synchronization signal included in the received data to the synchronization signal setting unit 205.

[0134] The synchronization signal setting unit 205 determines the position (e.g., the frequency position of the S-SS / PSBCH block) at which the synchronization signal (e.g., S-SS / PSBCH block) is to be transmitted based on information related to the synchronization signal determined in a pre-setting called "pre-configured" in a high-level control signal or a preset. In addition, when the frequency position of the S-SS / PSBCH block does not meet the provisions of the OCB, the synchronization signal setting unit 205 generates an additional signal to be transmitted and outputs the generated S-SS / PSBCH block to the signal allocation unit 206. It should be noted that the synchronization signal setting unit 205 may also output information related to the frequency position of the S-SS / PSBCH block to the signal allocation unit 206.

[0135] The error correction coding unit 207 acquires the data signal, performs error correction coding on the data signal, and outputs the error correction coded data signal to the modulation unit 208 .

[0136] The modulation unit 208 modulates the data signal received from the error correction coding unit 207 , and outputs the modulated signal to the signal distribution unit 206 .

[0137] The signal allocation unit 206 allocates the modulated signal output from the modulation unit 208 to the resource. In addition, the signal allocation unit 206 allocates the S-SS / PSBCH block output from the synchronization signal setting unit 205 to the resource. At this time, the signal allocation unit 206 can perform resource allocation based on the information related to the frequency position of the S-SS / PSBCH block output from the synchronization signal setting unit 205. The signal allocation unit 206 outputs the transmission signal after the resource allocation to the transmission unit 209.

[0138] The LBT carrier sensing unit 202 performs carrier sensing (or, referred to as "LBT") based on the received signal output from the receiving unit 201. The LBT carrier sensing unit 202 can determine whether the channel state is "busy" or "idle" based on the received signal output from the receiving unit 201. In other words, the LBT carrier sensing unit 202 can determine whether the channel is available based on the received signal output from the receiving unit 201. The LBT carrier sensing unit 202 outputs information indicating the determined channel state to the transmitting unit 209.

[0139] When the sensing result obtained from the LBT carrier sensing unit 202 indicates an idle state, the transmission unit 209 performs transmission processing such as up-conversion on the transmission signal, and transmits the transmission signal after the transmission processing via the antenna.

[0140] As described above, in the present embodiment 1, when a synchronization signal and / or a broadcast signal is transmitted, the synchronization signal and / or the broadcast signal is transmitted in a first frequency resource indicated by a parameter (e.g., sl-AbsoluteFrequencySSB) and a second frequency resource different from the first frequency resource. According to this structure, the frequency resources for transmitting the synchronization signal and / or the broadcast signal can be dispersed on the frequency axis, so that the provisions of the OCB are met and the resource configuration in the frequency direction can be appropriately performed.

[0141] (Implementation Method 2)

[0142] In this embodiment 2, an example is shown in which, when the terminal arranges PSCCH and PSSCH in the unlicensed band, the arrangement is made to satisfy the provisions of OCB. PSSCH is an example of a data signal, and PSCCH may be an example of a control signal (or control information).

[0143] Table 5 shows the relationship between SCS, bandwidth, and maximum number of PRBs in NR. In NR, the maximum number of PRBs is specified according to the bandwidth as shown in Table 5.

[0144] [Table 5]

[0145] SCS 20MHz 40MHz 60MHz 80MHz 100MHz 15kHz 106 216 - - - 30kHz 51 106 162 217 273 60kHz 24 51 79 107 135

[0146] When the frequency band is set according to the SL BWP (sidelink bandwidth part), the number of PRBs can be set to a value less than the maximum number of PRBs. In addition, in the setting of the resource pool of the sidelink, the starting RB of the subchannel and the number of subchannels in the resource pool can be specified using the two parameters "sl-StartRB-Subchannel-r16" and "sl-NumSubchannel-r16".

[0147] [Action Example 2-1]

[0148] In this operation example 2-1, the size of the subchannel used when allocating the PSSCH is made consistent with the SL BWP. When the size of the subchannel is made consistent with the SL BWP, the number of PRBs included in the BWP set as the SL BWP is set to one subchannel.

[0149] Fig. 9 FIG. 2 is a diagram showing an example of a subchannel in operation example 2-1 of the second embodiment. Fig. 9 (1) and (2) of FIG. 1 show examples of subchannel settings for different SL BWPs. Fig. 9 In (1) and (2), the vertical axis represents the frequency axis, and the horizontal axis represents the time axis.

[0150] For example, Fig. 9 As shown in (1), when the SL BWP is set to a PRB with a bandwidth of 20 MHz, as shown in Table 5, when the SCS is 30 kHz, the maximum number of PRBs is 51 PRBs. When the subchannel size is 51 PRBs, when the PSSCH is transmitted, the PSSCH is transmitted in 51 consecutive PRBs, thus satisfying the OCB requirement that the OCB in the 20 MHz NCB reaches more than 80%.

[0151] In addition, when the SL BWP is set to the maximum value of the PRB of the bandwidth of 100 MHz, as shown in Table 5, when the SCS is 30 kHz, the maximum value of the number of PRBs is 273 PRBs. When the subchannel size is 273 PRBs, when the PSSCH is transmitted, the PSSCH is transmitted in 273 consecutive PRBs. In this case, Fig. 9 As shown in (2), in each of the five frequency bands formed by dividing 100 MHz into 20 MHz bands, the OCB requirement that the OCB in the NCB of 20 MHz is 80% or more is satisfied.

[0152] The number of PRBs included in the SL BWP may also be changed based on a setting called "(pre-)configured" and / or notification from a higher layer. In addition, when a guard band is set at the edge of a band or in each band of an NCB, it may be set to a value smaller than the number of PRBs included in the SL BWP. Even in this case, a subchannel size that satisfies the OCB requirement of 80% or more in an NCB of 20 MHz is set.

[0153] Furthermore, when a guard band is set in each band of an NCB, when resources are allocated to bands of consecutive NCBs, resources may be allocated to PRBs that correspond to the guard bands that are not included in the subchannels.

[0154] The terminal implements LBT in the band of the configured PRBs included in the subchannel, and starts transmission when it is confirmed that the channel is not in use. When one subchannel spans multiple LBT BWs (bandwidth), the terminal implements LBT in multiple LBT BWs, and starts transmission when it is confirmed that the channel is not in use in all LBT BWs. In addition, in this action example 2-1, PSSCH is transmitted using the subchannel number 1.

[0155] [Action Example 2-2]

[0156] In this operation example 2-2, the size of the subchannel used when allocating the PSSCH is made consistent with the LBT BWP (bandwidth part).

[0157] Fig.10 FIG. 2 is a diagram showing an example of a subchannel in operation example 2-2 of the second embodiment. Fig.10 Examples of different subchannel settings are shown in (1) and (2). Fig.10 In (1) and (2), the vertical axis represents the frequency axis, and the horizontal axis represents the time axis.

[0158] When the subchannel size is made consistent with the LBT BW, for example, when the LBT BW is 20 MHz, the number of PRBs contained in 20 MHz is set as the subchannel size. For example, when the SCS is 30 kHz, if the total number of PRBs in the 20 MHz band is set as the subchannel size, the subchannel size is 51 PRBs.

[0159] In addition, if Fig.10 As shown in (1), when the LBT BW is 20 MHz and the SL BWP is 100 MHz, the subchannel size can be set to the number of PRBs included in the LBT BW of 20 MHz, and the number of subchannels can be set to 5.

[0160] In addition, if Fig.10 As shown in (2), when there is a guard band every 20 MHz in the BW of LBT, a subchannel size that is smaller than that in the case of no guard band can also be set. In this case, the number of PRBs of the subchannel size is also set to a value that satisfies the OCB to be greater than 80%. The guard band can also be a high-layer signaling and / or a predetermined setting called "(pre)setting". In the case of a guard band, the terminal can confirm through LBT that the channel is not in use for the band with a bandwidth of 20 MHz. Therefore, even when the channel of one band in two adjacent 20 MHz bands is already in use, it is still possible to start sending in the 20 MHz band where the channel is not in use. When the SL BWP is 100 MHz, LBT is implemented for each 20 MHz band separately, and in the band where the channel is confirmed to be idle through LBT, sending can also be performed in an idle channel.

[0161] In Action Example 2-1 and Action Example 2-2, the size of the PSCCH may be selected from 10, 12, 15, 20, or 25 PRBs, as in the authorized band. Then, the PSSCH may be configured in the selected PRB. In this case, the PSSCH may be configured from the PRB with the lowest PRB number among the plurality of PRBs.

[0162] In particular, in operation example 2-2, the size of the PSCCH may be made consistent with the size of the subchannel. By making the size of the PSCCH consistent with the size of the subchannel, it is possible to avoid transmitting the PSCCH beyond the LBT BW.

[0163] [Action Example 2-3]

[0164] In this operation example 2-3, PSSCH / PSCCH is transmitted in the interleaving. In addition, consecutive interleaving numbers may be assigned to PSSCH.

[0165] Fig.11This is a diagram showing a first example of allocation in Operation Example 2-3 of the second embodiment. Fig.12 This is a diagram showing a second example of allocation in Operation Example 2-3 of the second embodiment.

[0166] For example, in Fig.11 In , the PSCCH is allocated to one interlace in resource pool units. Fig.11 In the example, PSCCH is assigned to interlace #0, and PSSCH is assigned to interlaces #0, #1, and #2. In interlace #0, PSCCH is configured in the first symbol of the time slot, so PSSCH is transmitted in the symbol in interlace #0 that is not configured with PSCCH. In addition, PSCCH is assigned to the lowest interlace among the interlaces to which PSSCH is assigned.

[0167] In addition, Fig.11 Although the number of interleavings allocated to the PSCCH is one, the number of interleavings allocated to the PSCCH may be greater than 1. For example, the number of interleavings allocated to the PSCCH may also be set according to the resource pool. In addition, the number of interleavings allocated to the PSCCH may also be set according to the size of the PSCCH. For example, in the case where the PSSCH is allocated to interleavings #2, #3, and #4, in the case where the PSCCH has two interleaving sizes, the PSCCH is configured in the lower interleavings, i.e., interleavings #2 and #3, among the interleavings to which the PSSCH is allocated. For example, in the case where the PSCCH has one interleaving size, terminals other than the transmitting terminal attempt to detect the PSCCH in interleavings #0, #1, #2, #3, and #4, respectively.

[0168] When the number of PRBs included in the interleaving differs according to the interleaving number, the number of PRBs used by the PSCCH may also differ according to the interleaving number used. In addition, when only interleaving #0 has 11 PRBs and the other interleaving numbers have 10 PRBs, PSSCH is configured in the last PRB of interleaving #0 instead of PSCCH, thereby making the format of interleaving #0 consistent with the format of other interleavings.

[0169] For example, in Fig.12 An example of specifying the size of the PSCCH in units of PRBs is shown in FIG. Fig.12 In FIG. 1 , the case where PSCCH is allocated to 12 PRBs is shown as an example. In the case where interlace #0 contains 11 PRBs, if only interlace #0 is used, the number of PRBs is insufficient, so the PRB with the lowest PRB number in interlace #1 is used to ensure 12 PRBs. Fig.12 In the example of , PSSCH is arranged in interlaces #0, #1, and #2. PSCCH is arranged in the front symbol of the time slot, so PSSCH is transmitted in the symbol where PSCCH is not arranged.

[0170] According to action example 2-3, PSSCH and PSCCH can be configured in the interleaving, so that the OCB regulation can be met, that is, OCB meets more than 80% of NCB. In addition, in the transmission of continuous PRBs, the number of PRBs transmitted can be reduced compared to the case where the OCB regulation is met, so it is suitable for transmission by a terminal with limited transmission power.

[0171] [Structure of Terminal 200a]

[0172] Fig.13 is a block diagram showing the structure of the terminal 200a according to the second embodiment. Fig.13 Sometimes, Figure 8 The same structure is assigned the same reference numeral and the description thereof is omitted. In addition, the LBT carrier sensing unit 202, the demodulation unit 203, the error correction decoding unit 204, the signal distribution unit 206a, the error correction coding unit 207, the modulation unit 208, the setting information receiving unit 210 and the control signal generating unit 211 may be included in the control unit 220a. The control unit 220a may be understood as Figure 8 Another example of the control unit 220 shown in FIG. In addition, the receiving unit 201 and the sending unit 209 may be equivalent to Figure 4B The wireless transceiver unit 221 is shown.

[0173] In the sidelink communication, the terminal 200a may be a transmitting terminal that transmits the sidelink signal, or a receiving terminal that receives the sidelink signal. The terminal 200a may also be understood as Figure 8 Another example of terminal 200 is shown below. Figure 8 The differences between terminal 200 and terminal 200a are shown.

[0174] The configuration information receiving unit 210 acquires configuration information on the size of the subchannel and the size of the PSCCH determined in a higher layer control signal or a pre-setting called “preset.” The configuration information receiving unit 210 outputs the acquired configuration information to the signal allocating unit 206 a and the control signal generating unit 211 .

[0175] The control signal generating unit 211 determines the size of the PSCCH (e.g., the number of PRBs) based on the setting information output from the setting information receiving unit 210. The control signal generating unit 211 generates the first-stage SCI and the second-stage SCI signals based on the control information related to the sidelink communication, and outputs the generated signals to the signal allocating unit 206a.

[0176] The signal allocation unit 206a allocates the modulated signal output from the modulation unit 208 to the resource. The signal allocation unit 206a allocates the second-stage SCI to the PSSCH region and the first-stage SCI to the PSCCH region based on the number of PRBs of the PSCCH and the size of the subchannel of the PSSCH output from the setting information receiving unit 210. The signal allocation unit 206a outputs the transmission signal after the resource allocation to the transmission unit 209.

[0177] As described above, in the second embodiment, when a data signal and / or a control signal (e.g., PSSCH / PSCCH) is transmitted, the size of the subchannel is set to the size of the SL BWP or the size of the LBT BW. According to this structure, even when a data signal in a subchannel unit is transmitted, the provisions of the OCB can be met, and therefore, resource allocation in the frequency direction can be appropriately performed.

[0178] (Implementation method 3)

[0179] In this Embodiment 3, when the terminal arranges the PSFCH in the unlicensed band, the arrangement is set to satisfy the provisions of the OCB. In addition, the PSFCH is an example of a feedback signal.

[0180] It should be noted that the structure of the terminal of this embodiment 3 may be the same as Fig.13 The same structure as the terminal 200a shown in FIG. Figure 8 Alternatively, the terminal structure of the present embodiment 3 may also be a terminal 200 having the same structure as shown in FIG. Fig.13 The terminal 200a or Figure 8 The configuration of the terminal 200 shown is a configuration in which the following function is newly added, and this function causes the operation example described below to operate.

[0181] [Action Example 3-1]

[0182] In this action example 3-1, the terminal allocates PSFCH to the interleave and sends it.

[0183] Fig.14 FIG. 3 is a diagram showing a configuration example in operation example 3-1 of the third embodiment. Fig.14 (1) and (2) show examples of configuring PSFCH in different interlaces. Fig.14 The vertical axis of (1) and (2) represents the frequency axis.

[0184] For example, in Fig.14 In (1) and (2), the PSFCH is assigned to one interlace. Fig.14 In (1), the PSFCH is assigned to interlace #0 and is transmitted in interlace #0. Fig.14In (2), the PSFCH is assigned to interlace #1 and is transmitted in interlace #1. It should be noted that the interlace number to which the PSFCH is assigned may be determined based on at least one of the time slot number and the subchannel number to which the PSSCH is transmitted, which is the object of transmitting the feedback signal using the PSFCH. Furthermore, the interlace number to which the PSFCH is assigned may be determined based on the source ID and the member ID. In addition, the PSFCH may be further multiplexed using cyclic shift or the like.

[0185] According to Action Example 3-1, PSFCH is allocated to interleaving and transmitted, thereby satisfying the regulation of OCB. In addition, since PSFCH in the grant band is transmitted by one PRB, compared with this case, in Action Example 3-1, frequency diversity effect can be obtained by transmitting by multiple PRBs.

[0186] [Action Example 3-2]

[0187] In this action example 3-2, a part of the interleaving allocation is used to transmit the PSFCH.

[0188] Fig.15 FIG. 1 is a diagram showing an example of allocation in operation example 3-2 of the third embodiment. Fig.15 (1) and (2) show different PSFCH configuration examples. Fig.15 The vertical axis of (1) and (2) represents the frequency axis.

[0189] For example, in Fig.15 In (1) and (2), the PSFCH is allocated to one interlace, but is transmitted only in the PRBs at both ends of the band and is not transmitted in the PRBs inside the band.

[0190] exist Fig.15 In (1), PSFCH is sent in interlace #0. Fig.15 In (2), PSFCH is sent in interlace #1. Similar to action example 3-1, it is also possible to determine in which interlace number the PSFCH is sent based on at least one of the time slot number and the subchannel number in which the PSSCH is sent as the object of sending the feedback signal using the PSFCH. Moreover, it is also possible to determine in which interlace number the PSFCH is sent based on at least one of the source ID and the member ID. In addition, the PSFCH can also be further multiplexed by cyclic shift. It should be noted that when a guard band is set at the edge of the band, the PSFCH can also be configured in the PRB that is included in the relevant interlace and closest to the band edge among the PRBs that are not included in the guard band.

[0191] exist Fig.15In (1) and (2), even if PSFCH is transmitted at both ends of the interleaving allocation, the OCB regulation can still be met. In addition, since the number of transmitted PRBs is small, the power can be concentrated on two PRBs.

[0192] It should be noted that in the authorized band, since the PSFCH is transmitted in one PRB, the number of multiplexing is large. On the other hand, when the PSFCH is transmitted as in Action Example 3-1 or Action Example 3-2, the number of PSFCHs that can be multiplexed in the frequency direction is reduced compared to the PSFCH in the authorized band. For example, if the unit of resource allocation for PSSCH / PSCCH is increased as in the above-mentioned Implementation 2, the number of PSFCHs to be transmitted is also reduced, so even if interleaved allocation is performed, the number of PSFCHs may be sufficient. Therefore, it is effective to implement the action example of Implementation 3 in combination with the implementation.

[0193] It should be noted that in the authorized band, the frequency of configuring and transmitting the PSFCH can be selected. For example, in the authorized band, the terminal can select from a method of configuring the PSFCH in one of the four time slots of the sidelink time slot, a method of configuring it in two of the four time slots, a method of configuring it in all time slots, and a method of not configuring it. In the unlicensed band, it can be set at the same frequency as the authorized band, or it can be set at a frequency less than the authorized band by configuring it in one of the eight time slots.

[0194] As described above, in Embodiment 3, when sending a feedback signal, the resource for sending the feedback signal is set to an interleaved configuration. According to this configuration, the frequency resource for sending the feedback signal can be dispersed on the frequency axis, so that the OCB regulation can be met, and the resource configuration in the frequency direction can be appropriately performed.

[0195] [Transformation]

[0196] It should be noted that the operation examples of the above-mentioned embodiments may be used in combination.

[0197] It should be noted that the terminal that performs transmission and reception in the sidelink includes a terminal that performs transmission but not reception in the sidelink, a terminal that performs reception but not transmission, and a terminal that performs both transmission and reception.

[0198] It should be noted that, when the sidelink-related settings are preset, the setting method may be preset in the specification or in a SIM (Subscriber Identity Module). Alternatively, the sidelink-related settings may be set in an application layer called "preset", or in a SIB (system information block) and / or other RRC (radio resource control) or other high layers called "configured", or in a MAC (Medium Access Control).

[0199] It should be noted that although the above embodiments show examples of sidelink communication, the present disclosure is not limited thereto. For example, in the above embodiments, PSCCH may be replaced with PDCCH, PSSCH may be replaced with PDSCH or PUSCH, PSFCH may be replaced with PUCCH, and PSBCH may be replaced with PBCH, and the present disclosure may be applied to the communication between the base station and the terminal.

[0200] It should be noted that the above-mentioned embodiments may be applied to mode 2 but not to mode 1, may be applied to both mode 1 and mode 2, or may be applied to mode 1 but not to mode 2. In addition, in each action example of the above-mentioned embodiments, the action example applied to mode 1 and the action example applied to mode 2 may be the same or different. For example, there may be an action example applied to mode 2 but not to mode 1.

[0201] In addition, when the above embodiments are applied to Mode 1, the base station may instruct which operation example among the operation examples of the above embodiments is to be selected. For example, the base station may instruct in the authorized band.

[0202] In addition, although the above embodiments show operation examples in the unlicensed band, the frequency band of the unlicensed band may vary from country to country or region to region. The frequency band of the unlicensed band illustratively includes the 5 GHz band (5150 MHz-5925 MHz), the 6 GHz band (5925 MHz-7125 MHz), and 52.6 GHz to 71 GHz.

[0203] It should be noted that whether or not the above-mentioned embodiments or operation examples can be used may be changed according to SCS.

[0204] The SCI format transmitted in the PSCCH may be SCI format 1-A or a newly added SCI format.

[0205] The guard band may also be referred to as an "intra-cell guard band".

[0206] In the unlicensed band, when interleaved allocation is applied to PSCCH / PSSCH as in Embodiment 2, PSFCH may not be supported. By defining such supportability, interleaved allocation of PSCCH / PSSCH can be supported without supporting the new format of PSFCH.

[0207] It should be noted that the allocation of resources for sidelink communication illustrated in the above embodiments is an example, and the present disclosure is not limited to these allocations. For example, the resources for sidelink communication may also include signals, channels, and non-transmission intervals that are not illustrated. In addition, the widths of the signals in the time direction and frequency direction shown in the various figures are not limited to the illustrated examples. In addition, the size of the time slot, the size of the resource, the size of the channel, the size of the signal, etc. are not limited to the above examples. In addition, the value of the SCS, the sensing interval of the LBT, etc. are not limited to the above examples.

[0208] In addition, although the above-mentioned embodiments show an example in which the CP length of the sidelink signal is lengthened by CP extension to adjust the length of the sidelink signal, the present disclosure is not limited thereto. Instead of lengthening the CP length, the length may be adjusted by adding a known signal.

[0209] In addition, in the above-mentioned embodiments, confirmation of the channel idle state may be replaced by expressions such as sensing (or monitoring) the channel idle state. In addition, the "channel" in this case may be replaced by other terms such as "carrier" or "resource".

[0210] In addition, the method of notifying the terminal 200 of control information from the base station 100 is not limited to the above example, and may be notified (or broadcast, indicated, set) by at least one of system information such as MIB and SIB, RRC control information, MAC control information, and downlink control information (DCI: Downlink Control Information), or may be pre-set to the terminal 200 or pre-specified in the standard.

[0211] The base station may be referred to as a “gNodeB” or a “gNB.” In addition, the terminal may also be referred to as a “UE.”

[0212] The time resource unit of time slot can also be replaced by other units such as system frame, time slot, mini-time slot, frame, subframe, block, etc.

[0213] The expressions such as band, bandwidth, frequency band, frequency resource, frequency position, resource block, PRB, etc., which represent specific parts in the frequency domain, can also be replaced with each other. In addition, in the above, the frequency position is not limited to the example of representing a position in the frequency domain. For example, the frequency position can also represent a range with a width in the frequency domain.

[0214] In addition, the expression "...part" in the above-mentioned embodiments may be replaced by other expressions such as "...circuitry", "...device", "...unit" or "...module".

[0215] It should be noted that terms such as "interpret", "determine", "judge", "determine", "decide", "calculate", "grasp", "recognize", "confirm" or "understand" can be used interchangeably.

[0216] (Replenish)

[0217] The information indicating whether the terminal 200 supports the functions, actions or processes shown in the above-mentioned embodiments may be sent (or notified) by the terminal 200 to the base station 100 as capability information or capability parameters of the terminal 200, for example.

[0218] The capability information may also include the following information elements (IE: Information Element), which individually indicate whether the terminal 200 supports at least one of the functions, actions, or processes shown in the above embodiments. Alternatively, the capability information may also include the following information elements, which indicate whether the terminal 200 supports a combination of two or more of the functions, actions, or processes shown in the above embodiments.

[0219] The base station 100 may, for example, determine (or determine or assume) a function, action or process supported (or not supported) by the terminal 200 that sends the capability information based on the capability information received from the terminal 200. The base station 100 may implement an action, process or control corresponding to the result of the determination based on the capability information. For example, the base station 100 may control the sidelink communication between the terminals 200 based on the capability information received from the terminal 200.

[0220] It should be noted that the terminal 200 does not support a part of the functions, actions or processes shown in the above embodiments, which may also be replaced by limiting such a part of the functions, actions or processes in the terminal 200. For example, information or requests related to such limitations may also be notified to the base station 100.

[0221] The information related to the capability or limitation of the terminal 200 may be defined in the standard, for example, or may be implicitly notified to the base station 100 by being associated with information known to the base station 100 or information transmitted to the base station 100 .

[0222] (Control signal)

[0223] In the present disclosure, a downlink control signal (or downlink control information) associated with an embodiment of the present disclosure may be, for example, a signal (or information) sent in a physical downlink control channel (PDCCH: Physical Downlink Control Channel) of the physical layer, or a signal (or information) sent in a medium access control control element (MAC CE: Medium Access Control Control Element) or a radio resource control (RRC: Radio Resource Control) of a higher layer. In addition, the signal (or information) is not limited to the case of being notified by a downlink control signal, and may be pre-defined in a specification (or standard), or may be pre-set in a base station and a terminal.

[0224] In the present disclosure, an uplink control signal (or uplink control information) associated with an embodiment of the present disclosure may be, for example, a signal (or information) sent in a PUCCH of a physical layer, or a signal (or information) sent in a MAC CE or RRC of a higher layer. In addition, the signal (or information) is not limited to the case where it is notified by an uplink control signal, and may be pre-defined in a specification (or standard), or may be pre-set in a base station and a terminal. In addition, the uplink control signal may be, for example, changed to uplink control information (UCI: uplink control information), first stage (1st stage) sidelink control information (SCI: sidelink control information), or second stage (2nd stage) SCI.

[0225] (Base Station)

[0226] In one embodiment of the present disclosure, the base station may also be a transceiver point (TRP: Transmission Reception Point), a cluster head, an access point, a remote radio head (RRH: Remote Radio Head), an eNodeB (eNB), a gNodeB (gNB), a base station (BS: Base Station), a base transceiver station (BTS: Base Transceiver Station), a mother machine, a gateway, etc. In addition, in the sidelink communication, the terminal may also assume the role of the base station. In addition, the base station may also be replaced by a relay device that relays the communication between the high-level node and the terminal. In addition, the base station may also be replaced by a roadside device.

[0227] (Uplink / Downlink / Sidelink)

[0228] An embodiment of the present disclosure can be applied to any link in the uplink, downlink and sidelink. For example, an embodiment of the present disclosure can also be applied to the physical uplink shared channel (PUSCH: Physical Uplink Shared Channel), physical uplink control channel (PUCCH: Physical UplinkControl Channel), physical random access channel (PRACH: Physical Random Access Channel) of the uplink, physical downlink shared channel (PDSCH: Physical Downlink Shared Channel), PDCCH, physical broadcast channel (PBCH: Physical Broadcast Channel) of the downlink, or physical sidelink shared channel (PSSCH: Physical Sidelink Shared Channel), physical sidelink control channel (PSCCH: PhysicalSidelink Control Channel), physical sidelink broadcast channel (PSBCH: Physical SidelinkBroadcast Channel) of the sidelink.

[0229] In addition, PDCCH, PDSCH, PUSCH and PUCCH are examples of downlink control channels, downlink data channels, uplink data channels and uplink control channels, respectively. In addition, PSCCH and PSSCH are examples of sidelink control channels and sidelink data channels. In addition, PBCH and PSBCH are examples of broadcast channels, and PRACH is an example of a random access channel.

[0230] (Data Channel / Control Channel)

[0231] An embodiment of the present disclosure may be applied to any channel in a data channel and a control channel, for example. For example, the channel in an embodiment of the present disclosure may be changed to one of PDSCH, PUSCH, PSSCH of a data channel, or PDCCH, PUCCH, PBCH, PSCCH, PSBCH of a control channel.

[0232] (Reference signal)

[0233] In one embodiment of the present disclosure, a reference signal is, for example, a signal known to both a base station and a mobile station, and is sometimes referred to as a "Reference Signal (RS)" or a "pilot signal". The reference signal may be any one of a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS), a tracking reference signal (TRS), a phase tracking reference signal (PTRS), a cell-specific reference signal (CRS), and a sounding reference signal (SRS).

[0234] (Time interval)

[0235] In one embodiment of the present disclosure, the unit of time resources is not limited to one of a time slot and a symbol or a combination thereof, and may be, for example, a frame, a superframe, a subframe, a time slot, a time slot subslot, a minislot, or a symbol, an OFDM (Orthogonal Frequency Division Multiplexing) symbol, a single carrier-frequency division multiplexing (SC-FDMA) symbol, or other time resource units. In addition, the number of symbols contained in one time slot is not limited to the number of symbols exemplified in the above-mentioned embodiment, and may be other numbers of symbols.

[0236] (frequency band)

[0237] An embodiment of the present disclosure may be applied to any one of a licensed band and an unlicensed band.

[0238] (communication)

[0239] An embodiment of the present disclosure may be applied to any communication between a base station and a terminal (Uu link communication), between terminals (sidelink communication), and in-vehicle wireless communication technology (V2X: Vehicle to Everything). For example, the channel in an embodiment of the present disclosure may be changed to one of PSCCH, PSSCH, physical sidelink feedback channel (PSFCH: Physical Sidelink Feedback Channel), PSBCH, PDCCH, PUCCH, PDSCH, PUSCH, and PBCH.

[0240] In addition, an embodiment of the present disclosure can be applied to any network in a terrestrial network and a non-terrestrial network (NTN: Non-Terrestrial Network) using a satellite or a high altitude pseudo satellite (HAPS: High Altitude Pseudo Satellite). In addition, an embodiment of the present disclosure can also be applied to a terrestrial network such as a network with a large cell size and an ultra-wideband transmission network where the transmission delay is greater than the symbol length or the time slot length.

[0241] (Antenna port)

[0242] In one embodiment of the present disclosure, an antenna port refers to a logical antenna (antenna group) composed of one or more physical antennas. For example, an antenna port does not necessarily refer to a physical antenna, but sometimes refers to an array antenna composed of multiple antennas. For example, it may be that the antenna port is not specified to be composed of several physical antennas, but is specified as the minimum unit that the terminal can send a reference signal (reference signal). In addition, an antenna port is sometimes also specified as the minimum unit multiplied by the weight of a precoding vector.

[0243] <5G NR system architecture and protocol stack>

[0244] 3GPP is continuing work to implement the next version of fifth generation mobile technology (also referred to simply as "5G"), including the development of new radio access technology (NR) operating in the frequency range up to 100 GHz. The first version of the 5G standard was completed in late 2017, which enabled the transition to trial production of terminals (e.g., smartphones) compliant with the 5G NR standard and commercial deployment.

[0245] For example, the system architecture as a whole envisions a NG-RAN (Next Generation Radio Access Network) including gNBs. The gNB provides the UE-side termination of the protocols of the user plane (SDAP (Service Data Adaptation Protocol) / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY (Physical Layer)) and control plane (RRC) of the NG radio access. The gNBs are connected to each other through an Xn interface. In addition, the gNB is connected to the NGC (Next Generation Core) through a Next Generation (NG) interface, more specifically, to the AMF (Access and Mobility Management Function) (e.g., a specific core entity that executes the AMF) through an NG-C interface, and in addition, to the UPF (User Plane Function) (e.g., a specific core entity that executes the UPF) through an NG-U interface. Fig.16 Represents the NG-RAN architecture (for example, refer to 3GPP TS 38.300v15.6.0, section 4).

[0246] The protocol stack of the user plane of NR (e.g., refer to 3GPP TS 38.300, Section 4.4.1) includes the PDCP (Packet Data Convergence Protocol (see Section 6.4 of TS 38.300)) sublayer, the RLC (Radio Link Control (see Section 6.3 of TS 38.300)) sublayer and the MAC (Media Access Control (see Section 6.2 of TS 38.300)) sublayer terminated on the network side in the gNB. In addition, a sublayer (SDAP: Service Data Adaptation Protocol) of the new access stratum (AS: Access Stratum) has been introduced on PDCP (e.g., refer to Section 6.5 of 3GPP TS 38.300). In addition, a protocol stack of the control plane is defined for NR (e.g., refer to TS 38.300, Section 4.4.2). An overview of the functions of Layer 2 is described in Section 6 of TS 38.300. The functions of the PDCP sublayer, RLC sublayer and MAC sublayer are listed in Sections 6.4, 6.3 and 6.2 of TS 38.300 respectively. The functions of the RRC layer are listed in Section 7 of TS 38.300.

[0247] For example, the media access control layer handles multiplexing of logical channels, and scheduling including processing of various parameter sets and various functions associated with the scheduling.

[0248] For example, the physical layer (PHY) is responsible for coding, PHY HARQ (Physical Layer Hybrid Automatic Repeat Request) processing, modulation, multi-antenna processing, and mapping signals to appropriate physical time-frequency resources. In addition, the physical layer handles the mapping of transport channels to physical channels. The physical layer provides services to the MAC layer in the form of transport channels. A physical channel corresponds to a set of time-frequency resources used to send a specific transport channel, and each transport channel is mapped to a corresponding physical channel. For example, in the physical channel, the uplink physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), PUCCH (Physical Uplink Control Channel), and the downlink physical channels include PDSCH (Physical Downlink Shared Channel), PDCCH (Physical Downlink Control Channel), and PBCH (Physical Broadcast Channel).

[0249] The use cases / extended scenarios of NR may include enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine type communications (mMTC), which have various requirements in terms of data rate, latency, and coverage. For example, eMBB is expected to support peak data rates (20 Gbps in the downlink and 10 Gbps in the uplink) and effective (user-experienced) data rates that are about 3 times the data rates provided by IMT-Advanced (International Mobile Telecommunications-Advanced). On the other hand, in the case of URLLC, more stringent requirements are proposed for ultra-low latency (the latency of the user plane is 0.5 ms in UL and DL, respectively) and high reliability (within 1 ms, 1-10-5). Finally, in mMTC, preferably, a high connection density is required (1,000,000 devices / km in an urban environment). 2 ), wide coverage in harsh environments and extremely long battery life (15 years) for a cheap device.

[0250] Therefore, sometimes the parameter set of OFDM that is suitable for one use case (for example, subcarrier spacing (SCS: SubCarrier Spacing), OFDM codeword length, cyclic prefix (CP: Cyclic Prefix) length, number of codewords per scheduling interval) is invalid for other use cases. For example, in low-latency services, it is preferred that the codeword length is shorter than that of mMTC services (therefore, the subcarrier spacing is larger) and / or the number of codewords per scheduling interval (also called "TTI (Transmission Time Interval)") is small. Moreover, in extended scenarios where the delay spread of the channel is large, it is preferred that the CP length is longer than that of scenarios where the delay spread is short. The subcarrier spacing can also be optimized according to the situation to maintain the same CP overhead. The value of the subcarrier spacing supported by NR can be more than one. Correspondingly, subcarrier spacings of 15kHz, 30kHz, 60kHz... are currently considered. The codeword length Tu and the subcarrier spacing Δf are directly related according to the formula Δf=1 / Tu. Similar to the LTE system, the term “resource element” can be used to represent the minimum resource unit composed of one subcarrier with a length of one OFDM / SC-FDMA (Single-Carrier Frequency Division Multiple Access) symbol.

[0251] In the new wireless system 5G-NR, for each parameter set and each carrier, a resource grid of subcarriers and OFDM symbols is defined in the uplink and downlink. Each element of the resource grid is called a "resource element", which is determined based on the frequency index in the frequency domain and the symbol position in the time domain (refer to 3GPP TS 38.211v15.6.0).

[0252] <Functional separation between NG-RAN and 5GC in 5G NR>

[0253] Fig.17 Indicates the functional separation between NG-RAN and 5GC. The logical node of NG-RAN is gNB or ng-eNB. 5GC has logical nodes AMF, UPF and SMF (Session Management Function).

[0254] For example, gNB and ng-eNB host the following main functions:

[0255] - Radio Bearer Control, Radio Admission Control, Connection Mobility Control, and Radio Resource Management functions such as dynamically allocating (scheduling) resources to UEs in both uplink and downlink;

[0256] -IP (Internet Protocol) header compression, encryption and integrity protection of data;

[0257] - Selection of the AMF when attaching the UE in case the routing towards the AMF cannot be decided based on the information provided by the UE;

[0258] - Routing of user plane data towards UPF;

[0259] - Routing of control plane information towards the AMF;

[0260] -Set up and disconnect connections;

[0261] - Scheduling and sending of paging messages;

[0262] - Scheduling and sending of system broadcast information (AMF or operation, admission, maintenance function (OAM) as the originator);

[0263] - Settings for measurements and measurement reports for mobility and scheduling;

[0264] - Packet marking of the transmission class in uplink;

[0265] -Session management;

[0266] - Network slicing support;

[0267] - Management of QoS (Quality of Service) flows and mapping to data radio bearers;

[0268] - Support of UE in RRC_INACTIVE state;

[0269] -NAS (Non Access Stratum) message distribution function;

[0270] -Sharing of wireless access networks;

[0271] -Dual connection;

[0272] -Close collaboration between NR and E-UTRA (Evolved Universal Terrestrial Radio Access).

[0273] The access and mobility management function (AMF) hosts the following main functions:

[0274] - Functionality to terminate non-access stratum (NAS) signaling;

[0275] -Security of NAS signaling;

[0276] - Security control of access layer (AS);

[0277] -Core Network (CN) inter-node signaling for mobility between 3GPP access networks;

[0278] - the possibility of reaching the UE in idle mode (including the control and execution of paging retransmission);

[0279] - Management of the registration area;

[0280] -Support for intra-system and inter-system mobility;

[0281] -Access authentication;

[0282] - Access permission including roaming permission check;

[0283] -Mobility management control (subscription and policy);

[0284] - Network slicing support;

[0285] - Selection of Session Management Function (SMF).

[0286] In addition, the User Plane Function (UPF) hosts the following main functions:

[0287] - Anchor point for intra-RAT (Radio Access Technology) mobility / inter-RAT (Inter-RAT) mobility (where applicable);

[0288] - External PDU (Protocol Data Unit) session point for interconnection with data networks;

[0289] -Packet routing and forwarding;

[0290] -Policy rule enforcement for packet inspection and user plane;

[0291] - Business usage reporting;

[0292] - Uplink classifier for supporting routing of traffic towards data networks;

[0293] - Branching Point for supporting multi-homed PDU session;

[0294] - QoS processing for the user plane (e.g., packet filtering, gating, UL / DL rate enforcement);

[0295] - Verification of uplink services (mapping of SDF (Service Data Flow) to QoS flows);

[0296] - Downlink packet buffering and downlink data notification triggering function.

[0297] Finally, the Session Management Function (SMF) hosts the following main functions:

[0298] -Session management;

[0299] -Allocation and management of UE IP addresses;

[0300] - UPF selection and control;

[0301] - Traffic steering configuration function in the user plane function (UPF) for directing traffic to the appropriate destination;

[0302] - Enforcement of policies and QoS in the control part;

[0303] -Notification of downlink data.

[0304] <RRC connection setup and re-setup process>

[0305] Fig.18 Represents several interactions between the UE, gNB and AMF (5GC entity) when the NAS part of the UE transitions from RRC_IDLE (RRC Idle) to RRC_CONNECTED (RRC Connected) (refer to TS 38.300v15.6.0).

[0306] RRC is a high-layer signaling (protocol) used for the configuration of UE and gNB. Through this transition, AMF prepares UE context data (which includes, for example, PDU session context, security keys, UE radio capabilities (UE Radio Capability), UE security capabilities (UE Security Capabilities), etc.), and sends it to gNB together with the initial context setup request (INITIAL CONTEXTSETUP REQUEST). Next, the gNB activates AS security together with the UE. The gNB sends a Security Mode Command (SecurityModeCommand) message to the UE, and the UE responds to the gNB with a Security Mode Complete (SecurityModeComplete) message to activate AS security. Then, the gNB sends an RRC Reconfiguration (RRCReconfiguration) message to the UE, and the gNB receives an RRC Reconfiguration Complete (RRCReconfigurationComplete) from the UE for the RRC Reconfiguration message, thereby reconfiguring the Signaling Radio Bearer 2 (SRB2) and the Data Radio Bearer (DRB). For signaling-only connections, since SRB2 and DRB are not configured, the steps related to RRC reconfiguration can be omitted. Finally, the gNB notifies the AMF of the completion of the setup process using the INITIAL CONTEXT SETUP RESPONSE.

[0307] Therefore, the present disclosure provides the following fifth generation core network (5GC) entity (e.g., AMF, SMF, etc.), which includes: a control circuit, which, when in action, establishes a next generation (Next Generation, NG) connection with a gNodeB (gNodeB); and a sending unit, which, when in action, sends an initial context setting message to the gNodeB via the NG connection to set a signaling radio bearer between the gNodeB and the user equipment (UE: User Equipment). Specifically, the gNodeB sends a radio resource control (RRC) signaling containing a resource allocation setting information element (IE: Information Element) to the UE via the signaling radio bearer. Then, the UE sends in the uplink or receives in the downlink based on the resource allocation setting.

[0308] <Application scenarios of IMT after 2020>

[0309] Fig.19Indicates several use cases for 5G NR. In the 3rd generation partnership project new radio (3GPP NR), three use cases supporting a wide range of services and applications conceived through IMT-2020 have been studied. The planning and development of the first phase of specifications for large-capacity high-speed communications (eMBB: enhanced mobile broadband) has been completed. In current and future work, in addition to gradually expanding support for eMBB, it also includes standardization for ultra-reliable and low-latency communications (URLLC: ultra-reliable and low-latency communications) and multiple simultaneous machine-type communications (mMTC: massive machine-type communications). Fig.19 Several examples of the conceptual use scenarios of IMT after 2020 are shown (for example, see ITU-R M.2083 Figure 2 ).

[0310] The use cases of URLLC have strict requirements related to performance such as throughput, latency (delay) and availability. The use cases of URLLC are conceived as an element technology for realizing future applications such as wireless control of industrial production processes or manufacturing processes, remote medical surgery, automation of power transmission and distribution in smart grids, and traffic safety. The ultra-high reliability of URLLC is supported by determining technologies that meet the requirements set by TR38.913. In version 15 of NR URLLC, as an important requirement, the target user plane latency is 0.5ms in UL (uplink) and 0.5ms in DL (downlink). The overall URLLC requirement for a packet transmission is that the block error rate (BLER) is 1E-5 for a packet size of 32 bytes when the user plane latency is 1ms.

[0311] Considering the physical layer, a number of possible approaches can be used to improve reliability. Current scope for improving reliability includes defining additional CQI (Channel Quality Indicator) tables for URLLC, more compact DCI formats, repetition of PDCCH, etc. However, as NR (an important prerequisite for NR URLLC) becomes more stable and further developed, the scope can be expanded to achieve ultra-high reliability. Specific use cases for NR URLLC in Release 15 include Augmented Reality / Virtual Reality (AR / VR), e-Health, e-Safety and critical applications.

[0312] In addition, the technical enhancements of the NR URLLC target are aimed at improving latency and increasing reliability. Technical enhancements for improving latency include configurable parameter sets, non-slot-based scheduling with flexible mapping, unauthorized (configured authorized) uplink, slot-level repetition in the data channel, and preemption in the downlink. Preemption means stopping the transmission of allocated resources and using the allocated resources for other transmissions that are requested later and meet the necessary conditions of lower latency / higher priority. Therefore, the allowed transmission will be replaced by the subsequent transmission. Preemption can be applied regardless of the specific service type. For example, the transmission of service type A (URLLC) can also be replaced by the transmission of service type B (eMBB, etc.). Technical enhancements related to reliability improvement include dedicated CQI / MCS tables for target BLER of 1E-5.

[0313] The use case of mMTC (Massive Machine Type Communications) is characterized by the fact that typically there are a very large number of connected devices that send relatively small amounts of data that are not susceptible to latency. The devices are required to be low-priced and have very long battery life. From the NR point of view, utilizing very narrow bandwidth portions is one solution that can save power in the UE and extend its battery life.

[0314] As mentioned above, it is predicted that the room for reliability improvement in NR will be further expanded. It is one of the important requirements for all situations. For example, the important requirement related to URLLC and mMTC is high reliability or ultra-high reliability. From the wireless point of view and the network point of view, reliability can be improved in several mechanisms. In general, there are two to three important areas that may help improve reliability. These areas include compact control channel information, repetition of data channels / control channels, and diversity related to frequency domain, time domain and / or space domain. These areas can be used universally to improve reliability regardless of the specific communication scenario.

[0315] For NR URLLC, further use cases with stricter requirements are envisioned, such as factory automation, transportation, and power transmission. The strict requirements are high reliability (up to 10-6 reliability), high availability, packet size up to 256 bytes, time synchronization up to a few microseconds (μs) (the value can be set to 1μs or a few microseconds depending on the frequency range and short latency of around 0.5ms to 1ms (for example, 0.5ms latency in the user plane is set as the target) for the use case.

[0316] Moreover, regarding NR URLLC, from the perspective of the physical layer, there may be several technical enhancements. These technical enhancements include the enhancement of PDCCH (Physical Downlink Control Channel) related to compact DCI, repetition of PDCCH, and increased monitoring of PDCCH. In addition, the enhancement of UCI (Uplink Control Information) is related to the enhancement of enhanced HARQ (Hybrid Automatic Repeat Request) and CSI feedback. In addition, there may be enhancement of PUSCH related to frequency hopping at the mini-slot level and enhancement of retransmission / repetition. The term "mini-slot" refers to a transmission time interval (TTI) that contains fewer symbols than a slot (a slot has 14 symbols).

[0317] <QoS Control>

[0318] The 5G QoS (Quality of Service) model is based on QoS flows, supporting both QoS flows that require guaranteed bit rate (GBR: Guaranteed Bit Rate QoS flows) and QoS flows that do not require guaranteed bit rate (non-GBR QoS flows). Therefore, at the NAS level, QoS flows are the most fine-grained QoS divisions in a PDU session. QoS flows are determined within a PDU session based on the QoS flow ID (QFI: QoS Flow ID) transmitted by the encapsulation header via the NG-U interface.

[0319] For each UE, 5GC establishes one or more PDU sessions. For each UE, in conjunction with the PDU session, NG-RAN, for example, as described in the previous reference Fig.18 As described above, at least one data radio bearer (DRB) is established. In addition, the DRB added to the QoS flow of the PDU session can also be set later (when to set it depends on NG-RAN). NG-RAN maps packets belonging to various PDU sessions to various DRBs. NAS-level packet filters in UE and 5GC are used to associate UL packets and DL packets with QoS flows, and AS-level mapping rules in UE and NG-RAN associate UL QoS flows and DL QoS flows with DRBs.

[0320] Fig. 20 Represents the non-roaming reference architecture of 5G NR (see TS23.501v16.1.0, section 4.23). Application Function (AF) (e.g., host Fig.19The 3GPP core network (an external application server for the 5G service illustrated) interacts with the 3GPP core network to provide services. For example, accessing the Network Exposure Function (NEF) to support applications that affect the routing of services, or interacting with the policy framework (refer to the Policy Control Function (PCF)) for policy control (for example, QoS control). Based on the operator's deployment, the operator considers that trusted application functions can interact directly with the associated network function (Network Function). Application functions that are not allowed by the operator to directly access network functions interact with associated network functions via NEF using an open framework to the outside.

[0321] Fig. 20 It also represents further functional units of the 5G architecture, namely, Network Slice Selection Function (NSSF), Network Repository Function (NRF), Unified Data Management (UDM), Authentication Server Function (AUSF), Access and Mobility Management Function (AMF), Session Management Function (SMF) and Data Network (DN: Data Network, such as services provided by operators, Internet access or services provided by third parties). All or part of the core network functions and application services can also be deployed and operated in a cloud computing environment.

[0322] Therefore, the present disclosure provides the following application server (for example, AF of 5G architecture), which includes: a sending unit, which, in action, sends a request for QoS requirements for at least one of URLLC service, eMMB service and mMTC service to at least one of the functions of 5GC (for example, NEF, AMF, SMF, PCF, UPF, etc.) in order to establish a PDU session of a wireless bearer between a g-node B and a UE corresponding to the QoS requirements; and a control circuit, which, in action, uses the established PDU session to provide service.

[0323] The present disclosure can be implemented by software, hardware or software in cooperation with hardware. Each functional block used in the description of the above-mentioned embodiments is partially or entirely implemented as an LSI (Large Scale Integration) as an integrated circuit, and each process described in the above-mentioned embodiments may also be partially or entirely controlled by an LSI or a combination of LSIs. LSI may be composed of individual chips, or may be composed of one chip in a manner that includes part or all of the functional blocks. LSI may also include input and output of data. LSI may also be referred to as "IC (Integrated Circuit)", "System LSI", "Super LSI", "Ultra LSI" depending on the degree of integration.

[0324] The method of integrated circuitization is not limited to LSI, and can also be implemented by a dedicated circuit, a general-purpose processor or a dedicated processor. In addition, an FPGA (Field Programmable Gate Array) that can be programmed after LSI manufacturing, or a reconfigurable processor (Reconfigurable Processor) that can reconfigure the connection or setting of the circuit block inside the LSI can also be used. The present disclosure can also be implemented as digital processing or analog processing.

[0325] Furthermore, if integrated circuit technology that replaces LSI emerges as semiconductor technology advances or other technologies are derived, it is of course possible to use this technology to achieve integration of functional blocks. There is also the possibility of applying biotechnology, etc.

[0326] The present disclosure can be implemented in all kinds of devices, equipment, and systems (collectively referred to as "communication devices") with communication functions. The communication device may also include a wireless transceiver and a processing / control circuit. The wireless transceiver may also include a receiving unit and a transmitting unit, or perform the functions of these parts. The wireless transceiver (transmitting unit, receiving unit) may also include an RF (Radio Frequency) module and one or more antennas. The RF module may also include an amplifier, an RF modulator / demodulator, or a device similar to these. Non-limiting examples of communication devices include: phones (mobile phones, smart phones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebook computers, etc.), cameras (digital cameras, digital video cameras, etc.), digital players (digital audio / video players, etc.), wearable devices (wearable cameras, smart watches, tracking devices, etc.), game consoles, e-book readers, telehealth / telemedicine (telehealth / medical prescription) equipment, vehicles or transportation vehicles with communication functions (cars, airplanes, ships, etc.), and combinations of the above-mentioned various devices.

[0327] Communication devices are not limited to portable or mobile devices, but also include all kinds of devices, equipment, and systems that cannot be carried or fixed. For example, they include: smart home devices (home appliances, lighting equipment, smart meters or meters, control panels, etc.), vending machines, and all other "things" that can exist on the IoT (Internet of Things) network.

[0328] The communication includes data communication performed by a cellular system, a wireless LAN (Local Area Network) system, a communication satellite system, etc., and also includes data communication performed by a combination of these systems.

[0329] In addition, the communication device also includes devices such as controllers or sensors connected or linked to the communication device that performs the communication function described in the present invention. For example, it includes a controller or sensor that generates a control signal or data signal used by the communication device that performs the communication function of the communication device.

[0330] In addition, the communication device includes infrastructure equipment that communicates with the above-mentioned non-limiting various devices or controls the above-mentioned various devices, such as base stations, access points, and all other devices, equipment, and systems.

[0331] A communication device according to an embodiment of the present disclosure includes: a control circuit configured to configure a signal for sidelink communication in a frequency resource satisfying a bandwidth restriction associated with the frequency band in an unlicensed band; and a transmission circuit configured to transmit the signal.

[0332] In one embodiment of the present disclosure, the control circuit determines the second frequency resource in such a way that a first frequency resource specified by the following parameters and a second frequency resource different from the first frequency resource satisfy the bandwidth limitation, and the parameter is a parameter that specifies the resource of the synchronization signal and / or the broadcast signal of the sidelink communication; the sending circuit sends the synchronization signal and / or the broadcast signal in the first frequency resource and the second frequency resource.

[0333] In one embodiment of the present disclosure, the first frequency resource is commonly used in the sidelink communication and the link via the base station.

[0334] In one embodiment of the present disclosure, the first frequency resource is different in the sidelink communication and the link via the base station.

[0335] In one embodiment of the present disclosure, the control circuit configures the synchronization signal and / or the broadcast signal of the sidelink communication to be interleaved in a frequency band.

[0336] In one embodiment of the present disclosure, the control circuit sets the size of the resource for transmitting the data signal and / or the control signal of the sidelink communication to a size specified for the sidelink.

[0337] In one embodiment of the present disclosure, the control circuit sets the size of the resource for sending the data signal and / or the control signal of the sidelink communication to the following size, which is the size specified for Listen Before Talk (LBT).

[0338] In one embodiment of the present disclosure, the control circuit configures the feedback signal of the sidelink communication to be interleaved in a frequency band.

[0339] In one embodiment of the present disclosure, the control circuit determines the interlace number based on a timeslot number or a subchannel number of a data signal of the sidelink communication corresponding to a feedback signal of the sidelink communication received.

[0340] In a communication method according to an embodiment of the present disclosure, a communication device performs the following processing: configuring a signal for sidelink communication in a frequency resource satisfying a bandwidth restriction associated with the frequency band in an unlicensed band; and transmitting the signal.

[0341] The disclosed contents of the specification, drawings, and abstract contained in the Japanese patent application No. 2022-069210 filed on April 20, 2022 are incorporated herein by reference in their entirety.

[0342] Industrial Applicability

[0343] One aspect of the present disclosure is useful for a wireless communication system.

[0344] Description of Reference Numerals

[0345] 100 Base Stations

[0346] 101, 221 Wireless Transceiver

[0347] 102, 220, 220a control unit

[0348] 200, 200a terminal

[0349] 201 Receiving Department

[0350] 202 LBT Carrier Monitoring Unit

[0351] 203 Demodulation Unit

[0352] 204 Error Correction Decoding Unit

[0353] 205 Synchronous signal setting unit

[0354] 206, 206a signal distribution unit

[0355] 207 Error Correction Coding Unit

[0356] 208 Modulation Department

[0357] 209 Sending Department

[0358] 210 Setting information receiving unit

[0359] 211 Control signal generating unit

Claims

1. A communication device, characterized in that: include: The control circuit configures a signal for sidelink communication in a frequency resource in an unlicensed band that satisfies a bandwidth restriction associated with the frequency band; as well as The sending circuit sends the signal.

2. The communication device according to claim 1, wherein: the control circuit determines the second frequency resource in such a manner that a first frequency resource specified by a parameter specifying a resource of a synchronization signal and / or a broadcast signal of the sidelink communication and a second frequency resource different from the first frequency resource satisfy the bandwidth restriction, The sending circuit sends the synchronization signal and / or the broadcast signal in the first frequency resource and the second frequency resource.

3. The communication device according to claim 2, wherein: The first frequency resource is commonly used in the sidelink communication and the link via the base station.

4. The communication device according to claim 2, wherein: The first frequency resource is different in the sidelink communication and the link via the base station.

5. The communication device according to claim 1, wherein: The control circuit configures the synchronization signal and / or the broadcast signal of the sidelink communication to be interleaved in a frequency band.

6. The communication device according to claim 1, wherein: The control circuit sets a size of a resource for transmitting a data signal and / or a control signal of the sidelink communication to a size specified for the sidelink.

7. The communication device according to claim 1, wherein: The control circuit sets the size of the resource for transmitting the data signal and / or the control signal of the sidelink communication to a size specified for Listen Before Talk (LBT).

8. The communication device according to claim 1, wherein: The control circuit configures the feedback signal of the sidelink communication to be interleaved in a frequency band.

9. The communication device according to claim 8, wherein: The control circuit determines the interlace number based on a time slot number or a subchannel number in which a data signal of the sidelink communication corresponding to a feedback signal of the sidelink communication is received.

10. A communication method, characterized in that: The communication device performs the following processing: configuring a signal for sidelink communication in a frequency resource in an unlicensed band that satisfies a bandwidth restriction associated with the frequency band; and The signal is transmitted.

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