Terminal device, base station device, and wireless communication system

Abstract

This terminal device comprises a reception unit, a control unit, and a transmission unit. The reception unit receives first information constituting a first RO (RACH Occasion) on a resource other than the UL subband and second information constituting a second RO on the UL subband. The control unit transmits a PRACH (Physical Random Access Channel) via either the first RO or the second RO. The control unit determines an RA-RNTI (Random Access-Radio Network Temporary Identifier) on the basis of the RO that has transmitted the PRACH. In addition, the control unit determines whether a received response signal corresponds to the PRACH in accordance with at least one of the RA-RNTI or control information associated with the response signal.

Description

Terminal device, base station device, and wireless communication system

[0001] The present invention relates to a terminal device, a base station device, and a wireless communication system.

[0002] In today's networks, traffic from mobile devices (smartphones and feature phones) accounts for the majority of network resources. Furthermore, the traffic used by mobile devices is expected to continue to expand. In addition to traffic used by mobile devices, IoT (Internet of Things) services (e.g., transportation systems, smart meters, and monitoring systems for devices) are also being developed. Therefore, networks are being required to support services with diverse requirements. In order to accommodate such diverse services, the communication standards for fifth-generation mobile communications (5G or NR (New Radio)) (for example, Non-Patent Documents 1 to 14) include, in addition to the standard technologies of 4G (fourth-generation mobile communications), eMBB (Enhanced Mobile Broadband), Massive MTC (Machine Type Communications), and URLLC (Ultra-Reliable AND Low Latency Communications). The standards are being developed assuming support for many use cases classified as such.

[0003] In addition, in the working group of the 3rd Generation Partnership Project (3GPP (registered trademark)), an international standardization project, extension technologies for the above communication standards are currently being continuously studied and standardized.

[0004] For example, a 3GPP working group is considering the introduction of the SBFD (Subband Full Duplex) technology (Non-Patent Document 15), which is a technology for improving uplink latency and expanding coverage by configuring uplink resources on downlink symbols and / or flexible symbols.

[0005] 3GPP TS 37.324 V17.0.03GPP TS 37.340 V18.0.03GPP TS 38.201 V18.0.03GPP TS 38.202 V18.1.03GPP TS 38.211 V18.1.03GPP TS 38.212 V18.1.03GPP TS 38.213 V18.1.03GPP TS 38.214 V18.1.03GPP TS 38.215 V18.1.03GPP TS 38.300 V18.0.03GPP TS 38.321 V18.0.03GPP TS 38.322 V18.0.03GPP TS 38.323 V18.0.03GPP TS 38.331 V18.0.03GPP TR 38.858 V18.0.0

[0006] SBFD configures uplink resources on downlink symbols, for example. The uplink resources may be an uplink subband (UL subband). With the introduction of SBFD, a terminal device can transmit a Physical Random Access Channel (PRACH) using a RACH Occasion (RO) configured on the uplink subband. However, if an RO configured on the UL subband and an RO configured on a location other than the UL subband are configured, it is expected that the possibility of random access failure will increase. For example, in deriving an RA-RNTI (Random Access Radio Network Temporary Identifier), a problem may occur in which the RA-RNTI derived by an RO on the UL subband and an RO other than the UL subband is the same. For example, if the RA-RNTI has the same value, the terminal device may recognize a random access response that is not addressed to the terminal device as a random access response addressed to the terminal device. As a result, the random access procedure is more likely to fail.

[0007] The disclosed technology has been made in view of the above, and aims to improve the success probability of a random access procedure when an RO configured on an UL subband and an RO configured on a location other than the UL subband are configured.

[0008] One aspect provides a terminal device including: a receiving unit that receives first information constituting a first RO using resources other than a UL subband; and second information constituting a second RO on the UL subband; a transmitting unit that transmits a PRACH via either the first RO or the second RO; and a control unit that determines and calculates an RA-RNTI based on the RO that transmitted the PRACH, wherein the control unit determines whether the signal is a response signal to the PRACH according to at least one of the RA-RNTI and control information accompanying the response signal.

[0009] It is possible to provide a terminal, a base station device, a wireless communication system, etc. that can improve the success rate of a random access procedure when an RO configured on a UL subband and an RO configured on a location other than the UL subband are configured.

[0010] FIG. 1 is a diagram illustrating an example of a wireless communication system according to an embodiment. FIG. 2 is a diagram illustrating an example of a functional configuration of a base station device according to this embodiment. FIG. 3 is a diagram illustrating an example of a functional configuration of a terminal device according to this embodiment. FIG. 4 is a diagram illustrating an example of a slot configuration according to this embodiment. FIG. 5 is a diagram illustrating an example of the relationship between the value μ, slots, frames, and subframes according to this embodiment. FIG. 6 is a diagram illustrating an example of a sequence of a wireless communication system 1 according to this embodiment. FIG. 7 is a diagram illustrating an example of calculating an RA-RNTI in an uplink slot according to this embodiment. FIG. 8 is a diagram illustrating an example of a method of configuring an UL subband according to this embodiment. FIG. 9 is a sequence diagram of a wireless communication system according to this embodiment. FIG. 10 is a diagram illustrating an example of mapping an SSB to an RO on an SBFD symbol and an RO on a Non-SBFD symbol according to this embodiment. FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station device according to this embodiment. FIG. 12 is a diagram illustrating an example of the hardware configuration of a terminal device according to this embodiment.

[0011] The present embodiment will be described in detail below with reference to the drawings. The problems and embodiments in this specification are merely examples and do not limit the scope of the rights of the present application. In particular, even if the expressions used are different, the technology of the present application can be applied as long as they are technically equivalent, and do not limit the scope of the rights. Furthermore, each embodiment can be combined as appropriate within the scope of not causing any contradiction in the processing content.

[0012] Furthermore, the terms used and technical contents described in this specification may be those described in specifications and contributions as standards related to communications, such as 3GPP, as appropriate. Examples of such specifications include those described in Non-Patent Documents 1 to 15.

[0013] Hereinafter, embodiments of a base station apparatus, a terminal, and a wireless communication system disclosed in the present application will be described in detail with reference to the accompanying drawings. Note that the disclosed technology is not limited to the following embodiments. First Embodiment

[0014] FIG. 1 is a diagram showing an example of a wireless communication system according to the first embodiment. The wireless communication system may include a base station device 100A, a base station device 100B, a terminal device 200A, a terminal device 200B, and a terminal device 200C. When the terminal device 200A, the terminal device 200B, and the terminal device 200C are not distinguished from each other, they are simply referred to as the terminal device 200. The base station device 100A forms a cell C10. The cell C10 may be referred to as the coverage of the base station device 100A. The base station device 100B forms a cell C11. The cell C11 may be referred to as the coverage of the base station device 100B. When the base station device 100A and the base station device 100B are not distinguished from each other, they are simply referred to as the base station device 100. The terminal device 200 is located within the coverage of one of the base station devices 100 .

[0015] The base station device 100 may be, for example, a small radio base station such as a macro radio base station or a pico radio base station (including a micro radio base station, a femto radio base station, etc.), or may be a radio base station of various scales, and may be referred to as a radio communication device, a communication device, a transmitting device, etc. The terminal device 200 may be, for example, a radio terminal such as a mobile phone, a smartphone, a PDA (Personal Digital Assistant), a personal computer, a vehicle, or any of various devices or equipment (sensor devices, etc.) having a radio communication function, and may be referred to as a radio communication device, a communication device, a receiving device, a mobile station, etc.

[0016] The base station device 100 is connected to a network device (not shown) (a higher-level device or another base station device) via a wired connection. Note that the base station device 100 may be connected to the network device wirelessly instead of via a wired connection.

[0017] The base station device 100 may be configured such that the wireless communication function with the terminal device 200 and the digital signal processing and control functions are separated into separate devices. In this case, the device having the wireless communication function can be called an RRH (Remote Radio Head), and the device having the digital signal processing and control functions can be called a BBU (Base Band Unit). The RRHs may be installed extending from the BBU, and they may be connected by a wired connection such as optical fiber. Alternatively, they may be connected wirelessly. Instead of the aforementioned RRH and BBU, the base station device 100 may be separated into, for example, a Central Unit (CU), a Distributed Unit (DU), and a Radio Unit (RU). The DU includes, for example, a MAC (Media Access Control) layer function. The DU may also include, for example, a function of an RLC (Radio Link Control) layer. The RU includes at least an RF wireless circuit. The DU and RU may also be integrated into one unit.

[0018] On the other hand, the terminal device 200 communicates with the base station device 100 via wireless communication.

[0019] Note that the base station device 100 performs processing for establishing a Radio Resource Control (RRC) connection when an RRC connection has not been established with the terminal device 200. Note that the processing for establishing an RRC connection may include a random access procedure.

[0020] Next, the base station device 100 will be described. Fig. 2 is a diagram showing an example of a functional configuration diagram of the base station device 100 in this embodiment. The base station device 100 has a wireless communication unit 110, a control unit 120, a storage unit 130, and a communication unit 140.

[0021] The wireless communication unit 110 is composed of a transmitting unit 111 and a receiving unit 112, and performs wireless communication with the terminal device 200. Specifically, the transmitting unit 111 transmits to the terminal device 200 downlink signals such as a random access procedure signal, a downlink physical signal, an RRC layer signal, a downlink data signal, and a downlink control signal.

[0022] Furthermore, the receiving unit 112 can receive uplink signals transmitted from the terminal device 200, such as random access procedure signals, RRC layer signals, uplink data signals, and uplink control signals.

[0023] The control unit 120 controls the base station device 100. Specifically, it can control the establishment of an RRC connection with the terminal device 200, signal processing of signals received by the receiving unit 112, creation of a transport block (TB), mapping of the transmission block to radio resources, etc. The control unit 120 also calculates the transmission power of the downlink channel and / or the uplink channel and determines an RNTI (Radio Network Temporary Identifier).

[0024] The storage unit 130 can store, for example, downlink data signals.

[0025] The communication unit 140 connects to and communicates with a network device (e.g., a higher-level device or another base station) via a wired or wireless connection. The data signal received by the communication unit 140 and intended for the terminal device 200 can be stored in the storage unit 130.

[0026] Next, the terminal device 200 will be described. Fig. 3 is a diagram showing an example of a functional configuration diagram of the terminal device 200 in this embodiment. As shown in Fig. 3, the terminal device 200 includes a communication unit 210, a control unit 220, and a storage unit 230. These components are connected to enable unidirectional or bidirectional input and output of signals and data. The communication unit 210 can be described as being divided into a transmission unit 211 and a reception unit 212.

[0027] The transmitter 211 transmits data signals and control signals by wireless communication via an antenna. Note that the antenna may be common for both transmission and reception. The transmitter 211 transmits uplink signals such as random access procedure signals, RRC layer signals, uplink data signals, and uplink control signals.

[0028] The receiving unit 212 receives downlink signals, such as a random access procedure signal, a downlink data signal, and a downlink control signal, transmitted from the base station device 100. The received signals may also include reference signals used for channel estimation and demodulation, for example.

[0029] The control unit 220 controls the terminal device 200. Specifically, the control unit 220 can control the establishment of an RRC connection with the base station device 200, signal processing of signals received by the receiving unit 212, creation of transmission blocks (TBs), mapping of the transmission blocks to radio resources, etc. The control unit 220 can also calculate the transmission power of an uplink signal and / or an uplink channel and determine the RNTI.

[0030] The storage unit 230 can store, for example, an uplink data signal. The storage unit 230 can also store configuration information (or setting information) related to wireless communication transmitted from the base station device 100. The configuration information is, for example, configuration information for SBFD (Subband Full Duplex) and information related to RO (RACH Occasion).

[0031] The communication unit 110 of the base station device 100 and the communication unit 210 of the terminal device 200 may be configured to include an antenna port.

[0032] The uplink may be referred to as an uplink, and the downlink may be referred to as a downlink.

[0033] The uplink channel may include some or all of a PUSCH (Physical Uplink Shared Channel), a PUCCH (Physical Uplink Control Channel), a PRACH (Physical Random Access Channel), and an SRS (Sounding Reference Signal).

[0034] The uplink signal may be a signal transmitted via a PUSCH, a PUCCH, a PRACH, and an SRS.

[0035] The downlink channel may include some or all of the following: a PDSCH (Physical Downlink Shared Channel), a PDCCH (Physical Downlink Control Channel), a PBCH (Physical Broadcast Channel), an SSB (Synchronization Signal Block), and a CSI (Channel State Information)-RS (Reference Signal).

[0036] The downlink signal may be a signal transmitted via a PDSCH, a PDCCH, and a PBCH. The downlink signal may include a downlink reference signal. The SSB may be a synchronization signal (SS) / PBCH block.

[0037] The higher layer parameters may be any or all of the following: RRC parameters, MAC Media Access Control Element (CE), System Information Block (SIB), and Master Information Block (MIB).

[0038] Here, an example of slots for wireless communication between the base station device 100 and the terminal device 200 will be described.

[0039] FIG. 4 is a diagram showing an example of a slot configuration in this embodiment. The radio frame shown in FIG. 4 may be 10 milliseconds (msec). The radio frame may also be called a frame. The radio frame may also be called a system frame. The radio frame is composed of, for example, 10 subframes.

[0040] In the radio frame shown in FIG. 4, for example, the length of the time axis of the radio frame is determined according to the subcarrier spacing (SCS). For example, the subcarrier spacing is SCS=15×2. μ (kHz). In other words, μ = 0 means that the subcarrier spacing is 15 kHz. Note that hereinafter, μ may be referred to as the value μ or the value μ that determines the subcarrier spacing.

[0041] In addition, with a subcarrier spacing of 15 kHz, one frame may include 10 slots. One slot may include, for example, 14 OFDM symbols. An OFDM symbol may be composed of, for example, multiple physical resource blocks (PRBs). One physical resource block may be composed of, for example, 12 subcarriers.

[0042] The slot is, for example, n using the subcarrier spacing μ. ｓ μ They are numbered as n. ｓ μ For example, in one subframe, {0, 1, 2, ..., N ｓｌｏｔ subframe, μ-1} in ascending order. ｓ μ For example, in one frame, {0, 1, 2, ..., N ｓｌｏｔ ｆｒａｍｅ、μ -1} in increasing order. One slot is N ｓｙｍｂ ｓｌｏｔ may contain N OFDM symbols. ｓｙｍｂ ｓｌｏｔ may have different values ​​depending on the length of the cyclic prefix (CP).

[0043] FIG. 5 is a diagram showing an example of the relationship between the value μ, slots, frames, and subframes in this embodiment. Note that a normal CP may be used for all values ​​μ. Also, an extended CP may be used when μ=2. Regarding the length of the CP in the time domain, the normal CP may be shorter than the extended CP. Also, FIG. 5 shows the number N of slots included in one radio frame for the value μ. ｓｌｏｔ ｆｒａｍｅ、μ 1 shows an example of the number of slots included in one subframe for values ​​μ and μ. In the case of normal CP, for example, one slot includes 14 OFDM symbols. In the case of extended CP, for example, one slot includes 12 OFDM symbols. In the first embodiment, normal CP is assumed unless otherwise specified. Note that the technology in the first embodiment can be applied to normal CP and extended CP.

[0044] The value μ is a value for determining the subcarrier spacing as described above. The subcarrier spacing may also be referred to as numerology. Different numerologies may mean different subcarrier spacings.

[0045] The time resource may be one or more OFDM symbols, one or more slots, or one or more system frames.

[0046] A frequency resource may be one or more subcarriers. A frequency resource may be one or more PRBs.

[0047] An antenna port may be defined such that the channel on which a symbol is transmitted on a certain antenna port can infer the channel on which a different symbol is transmitted on the same antenna port, i.e., multiple symbols transmitted on the same antenna port at different times can be considered to be transmitted on the same channel.

[0048] If the long-scale property of a channel on which a symbol is transmitted on one antenna port can be used to predict the channel on which a different symbol is transmitted on the other antenna port, the two antenna ports may be said to be Quasi Co-located (QCL). The long-scale property may include some or all of one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial reception parameters.

[0049] For each numerology and carrier, the resource grid is N ｇｒｉｄ，ｘ ｓｉｚｅ，μ ×N ｓｃ ＲＢ subcarriers and N ｓｙｍｂ subframe, may be defined as μ OFDM symbols. ｓｃ ＲＢ may be 12.

[0050] FR1 (Frequency Range 1) may have a carrier frequency of 6 GHz or less, and FR2 may have a carrier frequency of 6 GHz or more.

[0051] TDD (Time Division Duplex) may also be called Unpaired Spectrum.

[0052] The Random Access Preamble Sequence supports four or more different lengths, which may include at least 139, 571, 839, and 1151.

[0053] A random access preamble sequence of length 839 may be applied to 1.25 kHz and / or 5 kHz SCSs. A random access preamble sequence of length 139 may be applied to 15 kHz, 30 kHz, 60 kHz, 120 kHz, 480 kHz, and 960 kHz SCSs. A random access preamble sequence of length 571 may be applied to 30 kHz, 120 kHz, and / or 480 kHz SCSs. A random access preamble sequence of length 1151 may be applied to 15 kHz and / or 120 kHz SCSs.

[0054] Next, TDD (Time Division Duplex) will be described. In TDD, the base station apparatus 100 may determine a slot format. In TDD, the base station apparatus 100 may transmit slot format configuration information to the terminal apparatus 200. The terminal apparatus 200 may determine a slot format based on the slot format configuration information. The base station apparatus 100 may know the slot format of the terminal apparatus 200 in a cell included in the base station apparatus 100. The slot format configuration information may be one or more higher layer parameters or one or more physical layer signals.

[0055] When slot format configuration information tdd-UL-DL-ConfigurationCommon is provided to the terminal device 200, the terminal device 200 sets a slot format for each slot in a plurality of slots according to the instruction of the slot format configuration information. Setting the slot format may be determining the slot format. The slot format configuration information tdd-UL-DL-ConfigurationCommon may be an upper layer parameter.

[0056] The slot format configuration information tdd-UL-DL-ConfigurationCommon is the reference SCS μ ｒｅｆ (reference SCS Configuration) and pattern 1 are provided.ｒｅｆ may be an integer equal to or greater than 0. Pattern 1 includes a parameter dl-UL-TransmissionPeriodicity that sets the slot configuration period P milliseconds (msec), the number of downlink slots d ｓｌｏｔｓ The parameter nrofDownlinkSlots, which sets the number of downlink symbols d ｓｙｍ The parameter nrofDownlinkSymbols that sets the number of uplink slots u ｓｌｏｔｓ The parameter nrofUplinkSlots, which sets the number of uplink symbols u ｓｙｍ A parameter nrofUplinkSymbols may be provided that sets the milliseconds. A millisecond is one thousandth of a second.

[0057] The slot configuration period P milliseconds is ｒｅｆ In this case, S = P × 2 μｒｅｆ For example, if P is 2.5 and μ ｒｅｆ If d is 1, 5 slots (i.e., S=5) may be included in 2.5 milliseconds. In the S slots, the first d ｓｌｏｔｓ This slot may be only a downlink slot. ｓｌｏｔｓ These slots may be uplink slots only. ｓｌｏｔｓ This slot may be an earlier slot in the S slots. ｓｌｏｔｓ This slot may be a later slot in time sequence, i.e., the first d ｓｌｏｔｓ The slots are the last u ｓｌｏｔｓ The first d slot may be a slot that is earlier in time sequence than the first d slot. ｓｌｏｔｓ d after slots ｓｙｍ These symbols may be downlink symbols. ｓｌｏｔｓ u before slots ｓｙｍ The symbols may be uplink symbols. ｓｙｍ The symbols may be flexible symbols, where f ｓｙｍ = (S-dｓｌｏｔｓ -u ｓｌｏｔｓ ) x N Ｓｙｍｂ ｓｌｏｔ -d ｓｙｍ -u ｓｙｍ That is, in the S slots, d ｓｌｏｔｓ , d ｓｙｍ , f ｓｙｍ , u ｓｙｍ , u ｓｌｏｔｓ The order may be:

[0058] The downlink slot may include a downlink symbol, the uplink slot may include an uplink symbol, and the first symbol of every 20 / P period may be the first symbol of an even frame.

[0059] When the slot format configuration information tdd-UL-DL-ConfigurationCommon provides pattern 1 and pattern 2, the terminal device 200 may set a slot format for each slot on a first number of slots indicated by pattern 1, and may set a slot format for each slot on a second number of slots indicated by pattern 2.

[0060] Pattern 2 is the slot configuration period P ２ Parameter dl-UL-TransmissionPeriodicity for setting milliseconds (msec), number of downlink slots d ｓｌｏｔｓ、２ The parameter nrofDownlinkSlots, which sets the number of downlink symbols d ｓｙｍ、２ The parameter nrofDownlinkSymbols that sets the number of uplink slots u ｓｌｏｔｓ、２ The parameter nrofUplinkSlots, which sets the number of uplink symbols u ｓｙｍ、２ A parameter nrofUplinkSymbols may be provided that sets the

[0061] Slot configuration period P+P ２ Milliseconds are measured by SCS. ｒｅｆ In the time series, first S = P × 2 μｒｅｆ slots, followed by S ２ =P ２×2 μｒｅｆ The S may include slots. ２ In the slot, the first d ｓｌｏｔｓ、２ This slot may be only a downlink slot. ｓｌｏｔｓ、２ These slots may be uplink slots only. ｓｌｏｔｓ、２ This slot may be an earlier slot in the S slots. ｓｌｏｔｓ、２ This slot may be a later slot in time sequence, i.e., the first d ｓｌｏｔｓ、２ The slots are the last u ｓｌｏｔｓ、２ The first d slot may be a slot that is earlier in time sequence than the first d slot. ｓｌｏｔｓ、２ d after slots ｓｙｍ、２ These symbols may be downlink symbols. ｓｌｏｔｓ、２ u before slots ｓｙｍ、２ The symbols may be uplink symbols. ２ In slots, f ｓｙｍ、２ The symbols may be flexible symbols, where f ｓｙｍ、２ = (S ２ -d ｓｌｏｔｓ、２ -u ｓｌｏｔｓ、２ ) x N Ｓｙｍｂ ｓｌｏｔ -d ｓｙｍ、２ -u ｓｙｍ、２ That is, the S ２ In the slots, d ｓｌｏｔｓ、２ , d ｓｙｍ、２ , f ｓｙｍ、２ , u ｓｙｍ、２ , u ｓｌｏｔｓ、２ The order may be:

[0062] In the downlink slots and / or downlink symbols, the terminal device 200 may receive a downlink channel and / or a downlink signal. For example, the terminal device 200 may receive a PDSCH, a PDCCH, a PBCH, a CSI-RS, or an SSB in the downlink slots and / or downlink symbols. In the uplink slots and / or uplink symbols, the terminal device 200 may receive an uplink channel and / or an uplink signal. For example, the terminal device 200 may transmit a PUSCH, a PUCCH, a PRACH, or an SRS in the uplink slots and / or uplink symbols. In the flexible slots and / or flexible symbols, the terminal device 200 may receive a downlink channel or a downlink signal scheduled in a DCI format. In the flexible slots and / or flexible symbols, the terminal device 200 may transmit an uplink channel or an uplink signal scheduled in a DCI format. The terminal device 200 may transmit the PRACH in a flexible slot and / or a flexible symbol.

[0063] If the terminal device 200 is not configured to monitor the PDCCH of DCI format 2_0 in a set of slot symbols indicated as flexible by tdd-UL-DL-ConfigurationCommon and / or tdd-UL-DL-ConfigurationDedicated, or if tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated are not provided to the terminal device 200, the terminal device 200 may receive a PDSCH or CSI-RS in the set of slot symbols if the terminal device 200 receives a corresponding instruction in the DCI format.

[0064] If the terminal device 200 is not configured to monitor the PDCCH of DCI format 2_0 in a set of symbols of a slot indicated as flexible by tdd-UL-DL-ConfigurationCommon and / or tdd-UL-DL-ConfigurationDedicated, or if tdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationDedicated are not provided to the terminal device 200, If a corresponding indication is received by the UL grant or successRAR, the terminal device 200 may transmit a PUSCH, a PUCCH, a PRACH, or an SRS in a set of symbols of the slot.

[0065] A terminal device 200 configured to operate in the BWP (Bandwidth Part) of a serving cell may have a set of up to four BWPs configured by the upper layer of the serving cell. The set of BWPs may include an uplink BWP (UL BWP) and a downlink BWP (DL BWP). The DL BWP may be used by the terminal device 200 for reception in the downlink bandwidth. The DL BWP may be configured based on the upper layer parameter BWP-Downlink, or may be configured based on the upper layer parameter initialDownlinkBWP using a parameter set configured by the upper layer parameter BWP-DownlinkCommon and the upper layer parameter BWP-DownlinkDedicated. The UL BWP may be used for transmission in the uplink bandwidth by the terminal device 200. The UL BWP may be configured based on the upper layer parameter BWP-Uplink, or may be configured based on the upper layer parameter initialUplinkBWP using a parameter set (a set of parameters) configured by the upper layer parameter BWP-UplinkCommon and the upper layer parameter BWP-UplinkDedicated.

[0066] If the higher layer parameter initialDownlinkBWP is not provided to the terminal device 200, the initial DL BWP may be set according to the position and number of consecutive PRBs starting from the PRB with the lowest index among the PRBs of a CORESET (Control Resource Set) for the Type0-PDCCH CSS set and ending with the PRB with the highest index. If the higher layer parameter initialDownlinkBWP is not provided to the terminal device 200, the bandwidth of the initial DL BWP may be the same as the bandwidth of the CORESET in which the Type0-PDCCH CSS set is configured. When the higher layer parameter initialDownlinkBWP is not provided to the terminal device 200, the SCS of the Initial DL BWP and the Cyclic Prefix for PDCCH reception may be the same as the SCS and Cyclic Prefix of the CORESET in which the Type0-PDCCH CSS set is configured. When the higher layer parameter initialDownlinkBWP is provided to the terminal device 200, the Initial DL BWP may be provided by the higher layer parameter initialDownlinkBWP. In the case of operation in a primary cell or a secondary cell, the terminal device 200 may be provided with the Initial UL BWP by the InitialUplinkBWP. When a supplementary UL carrier is configured in the terminal device 200, the terminal device 200 may be provided with an initial UL BWP on the supplementary UL carrier by the initial uplink BWP.

[0067] The terminal device 200 may transmit an uplink channel and / or an uplink signal in a UL BWP. The terminal device 200 may receive a downlink channel and / or a downlink signal in a DL BWP.

[0068] The flow of signals between the base station device 100 and the terminal device 200 in the first embodiment will be described using Figure 6. Figure 6 is a diagram showing an example of a sequence in the wireless communication system 1 in the first embodiment. In the sequence diagram shown in Figure 6, steps S20 to S50 may be referred to as a random access procedure. Although Figure 6 uses a contention-based four-step random access procedure for explanation, this is not limiting. For example, the present invention can also be applied to a non-contention-based random access procedure or a two-step random access procedure. The four-step random access procedure may also be referred to as a type 1 random access procedure.

[0069] The base station device 100 transmits a first signal including information related to the random access procedure (step S10). Note that the first signal is transmitted, for example, as a signal of the RRC layer or in System Information Block 1 (SIB1). The information related to the random access procedure is an example of the first information.

[0070] The information related to the random access procedure may include, for example, information indicating a frequency resource and / or a time resource in which the PRACH Occasion is configured. The PRACH Occasion corresponds to, for example, a resource in which the PRACH can be transmitted. The PRACH Occasion may also be a valid resource in which the PRACH can be transmitted. The PRACH Occasion indicates an area in which the PRACH can be transmitted. The PRACH Occasion may have a different configuration depending on the PRACH format. The PRACH Occasion may also be referred to as RO (RACH Occasion). The PRACH Occasion is an example of a resource for random access. The PRACH format may also be a PRACH preamble format.

[0071] A PRACH preamble format may be defined by one or more PRACH OFDM symbols and different cyclic prefixes (CPs) and guard times. The PRACH preamble configuration may be provided to the terminal device 200 in system information.

[0072] The terminal device 200 receives the number N of SS / PBCH blocks associated with one RO by ssb-perRACH-OccasionAndCBPreamblesPerSSB. ＳＳＢ and the number of contention based preambles per SS / PBCH block per enabled RO, R, may be provided. ＳＳＢ < 1, one SS / PBCH block is 1 / N ＳＳＢ The indices of the R contention-based preambles may start from 0 and be mapped to N consecutive valid ROs, with consecutive indices associated with SS / PBCH blocks for each valid RO. ＳＳＢ If ≥ 1, the indices of the R contention-based preambles with consecutive indices associated with SS / PBCH block n are n × N for each valid RO. ｐｒｅａｍｂｌｅ ｔｏｔａｌ / N, where N ｐｒｅａｍｂｌｅ ｔｏｔａｌ may be given by totalNumberOfRA-Preambles. ｐｒｅａｍｂｌｅ ｔｏｔａｌ is N ＳＳＢ n may be 0 or more, or may be a multiple of N ＳＳＢ It may be -1 or less.

[0073] The SS / PBCH block indices provided by ssb-PositionsInBurst included in SIB1 or ServingCellConfigCommon may be mapped to valid ROs in the following order: First, in ascending order of preamble indices within one RO; Second, in ascending order of frequency resource indices of frequency-multiplexed ROs; Third, in ascending order of time resource indices of PRACHs time-multiplexed within a PRACH slot; Fourth, in ascending order of PRACH slot indices.

[0074] For example, when it is determined based on the information on the multiple resources used for transmitting the PRACH that the PRACH should be transmitted using one resource, the transmitter 211 of the terminal device 200 transmits one PRACH. For example, when it is determined based on the information on the multiple resources used for transmitting the PRACH that the PRACH should be transmitted using two resources, the transmitter 211 of the terminal device 200 transmits two PRACHs. Furthermore, when it is determined based on the information on the multiple resources used for transmitting the PRACH that the PRACH should be transmitted using four resources, the transmitter 211 of the terminal device 200 transmits four PRACHs.

[0075] The information about the random access procedure includes, for example, configuration information for PRACH transmission, a preamble index, subcarrier spacing of the preamble, and PRACH transmission power P ＰＲＡＣＨ，ｔａｒｇｅｔ The PRACH may include one or all of the following: a RA-RNTI, a PRACH resource, and a random access preamble sequence. Note that the PRACH may be transmitted, for example, on a designated PRACH resource using a selected PRACH format with a PRACH transmission power P ＰＲＡＣＨ，ｔａｒｇｅｔThe RA-RNTI is transmitted from the transmitting unit 211 of the terminal device 200. Note that the RA-RNTI may be an RNTI that is scrambled in a PDCCH that schedules a random access response (RAR) in response to the transmission of a PRACH.

[0076] Furthermore, the configuration information for PRACH transmission may correspond to, for example, information on a plurality of resources for transmitting PRACH multiple times, or information corresponding to bundling.

[0077] The first signal also includes, for example, information that allows the terminal device 200 to determine the relationship between the SSB and the RACH resource. The RSRP threshold value used to select the SSB to be associated with the RACH resource is set by, for example, the base station device 100.

[0078] Returning to the description of Fig. 6, the random access procedure is triggered by, for example, a PRACH transmission request by a higher layer and / or a PDCCH order. The random access procedure may also be triggered after the terminal device 200 completes a cell search procedure.

[0079] When the random access procedure is triggered, the control unit 220 of the terminal device 200 selects a random access preamble from among the random access preamble candidates. Note that the random access procedure is triggered by, for example, a request for PRACH transmission by a higher layer and / or a PDCCH order.

[0080] In the contention-based random access procedure, the terminal device 200 is associated with, for example, one PRACH occasion. ｓｓｂｉｎｄｅｘ) and R contention-based preambles are provided via the first signal. The selected random access preamble is selected from the R contention-based preambles.

[0081] The transmitter 211 of the terminal device 200 transmits a first number of random access preambles according to the information on the random access procedure (step S20). The random access preambles can be referred to as message 1 of the random access procedure or message 1. The random access preambles may be transmitted on the PRACH.

[0082] When the receiving unit 112 of the base station device 100 receives at least a portion of the first number of random access preambles (step S20), the transmitting unit 111 transmits a random access response to the terminal device 200 (step S30). The random access response can be described as message 2 of the random access procedure or message 2 (Msg2). Msg2 may be scheduled by a PDCCH in which the RA-RNTI is scrambled. The terminal device 200 may detect and / or receive the PDCCH by configuring a CORESET and a search space. Msg2 may include scheduling information for message 3 (MSG3) to be transmitted by the terminal device 200, which will be described later.

[0083] Note that the base station device 100 calculates the RA-RNTI corresponding to the PRACH Occasion, for example, in accordance with one of the first number of random access preambles transmitted by the terminal device 200. For example, the RA-RNTI is calculated using the following Equation 1.

[0084] (Formula 1)

[0085] Here, for example, s ｉｄmay be the index of the first OFDM symbol of the PRACH Occasion corresponding to each of the first number of random access preambles used for PRACH transmission. ｉｄ may be a value greater than or equal to 0 and less than 14. ｉｄ may be the index of the first slot in the system frame containing the PRACH Occasion corresponding to each of the first number of random access preamble transmissions. ｉｄ may be a value equal to or greater than 0. ｉｄ may be a value greater than or equal to 0 and less than 80. ｉｄ may be an index of the PRACH occasion in the frequency domain. ｉｄ may be a value greater than or equal to 0 and less than 8. For example, ul_carrier_id may be an uplink carrier used for transmitting the random access preamble. For example, ul_carrier_id may be a value of 0 or 1.

[0086] In addition, s ｉｄ Yat ｉｄ may be such that each of the first number of random access preambles corresponds to the last OFDM of the corresponding PRACH Occasion.

[0087] In short, s ｉｄ Yat ｉｄ may be a value that is set according to the first number of random access preambles.

[0088] When the receiving unit 212 of the terminal device 200 receives the random access response (step S30), the transmitting unit 211 transmits a scheduled transmission in response to the random access response to the base station device 100 (step S40). The scheduled transmission can be described as message 3 (Msg3) of the random access procedure.

[0089] When the receiver 112 of the base station device 100 receives the scheduled transmission (step S40), the transmitter 111 transmits a contention resolution to the terminal device 200 (step S50). Note that the contention resolution can be described as message 4 or message 4 of the random access procedure.

[0090] 7 is a diagram showing an example of calculating the RA-RNTI in the uplink slot in this embodiment. In the case of calculating the RA-RNTI in the subcarrier spacing μ, the number of slots included in one system frame is N shown in FIG. ｓｌｏｔ ｆｒａｍｅ、μ 14×24+14×80×0+14×80×8×0=337. When μ is 3 or more, the number of slots used in calculating the RA-RNTI may be 80. FIG. 7 shows an example in which the number of slots included in one system frame is 80. Also, in FIG. 7, it is assumed that there are two FDMs for the RO and that the RO has a duration of 6 symbols configured from the first OFDM symbol according to higher layer parameters. When ul_carrier_id is 0, if the terminal device 200 transmits a PRACH using an RO with f_id of 0 configured in the 25th slot, the RA-RNTI may be calculated as 1+0+14×24+14×80×0+14×80×8×0=337 according to Equation 1. When ul_carrier_id is 0, if the terminal device 200 transmits a PRACH with an RO having f_id of 1 configured in the 25th slot, the RA-RNTI may be 1 + 0 + 14 x 24 + 14 x 80 x 1 + 14 x 80 x 8 x 0 = 1457 according to equation 1.

[0091] Next, SBFD (Subband Full Duplex) will be described. SBFD allows transmission and reception to be performed simultaneously at the same time (Same Time Instance) in the base station device 100. For example, a base station device 100 that supports SBFD can simultaneously transmit a PDSCH and receive a PUSCH in the same slot. When SBFD is configured in a certain terminal device 200, the terminal device 200 does not need to simultaneously transmit an uplink and receive a downlink. For example, a terminal device 200 configured with SBFD does not simultaneously transmit a PUSCH and a PDSCH in the same time.

[0092] When SBFD is configured in the terminal device 200, SBFD may be configured in one or more component carriers (CCs).

[0093] SBFD may allocate some or all of the configurable frequency resources on a downlink symbol to the uplink. SBFD may allocate some or all of the configurable frequency resources on a flexible symbol to the uplink. The downlink symbol, or the frequency resources allocated to the uplink, including some or all of the configurable frequency resources on the flexible symbol, may be referred to as an UL subband. The UL subband may be an uplink subband. The UL subband may be an uplink subband. The terminal device 200 may transmit an uplink channel or an uplink signal on the UL subband. For example, the terminal device 200 may transmit a PUCCH on the UL subband. For example, the terminal device 200 may transmit a PUSCH on the UL subband. For example, the terminal device 200 may transmit the PRACH on the UL subband. For example, the terminal device 200 may transmit the SRS on the UL subband.

[0094] The SBFD symbol may be a symbol in which a UL subband is configured, or may be a slot including a symbol in which a UL subband is configured.

[0095] The base station device 100 may provide UL subband configuration information to the terminal device 200. The UL subband configuration information may include some or all of the following: a starting PRB index of the UL subband, a bandwidth of the UL subband, a symbol index in which the UL subband is configured, and a slot index in which the UL subband is configured.

[0096] The period of the SBFD symbol configuration in the time domain may be the same as the period P included in the slot format configuration information. When pattern 2 is provided to the terminal device 200, the period of the SBFD symbol configuration in the time domain may be the period P included in the slot format configuration information and the period P ２ Within the period of the SBFD symbol configuration in the time domain, the base station apparatus 100 may provide information on the time resources in which the SBFD symbols are configured to the terminal apparatus 200 using the higher layer parameter SBFDTimeResourceIndication. The base station apparatus 100 may provide information on the time resources in which the SBFD symbols are configured to the terminal apparatus 200 using DCI. The terminal apparatus 200 may configure the SBFD symbols based on the information on the time resources in which the SBFD symbols are configured.

[0097] 8 is a diagram showing an example of a method for configuring a UL subband in this embodiment. The period 801 may be a period indicated by the upper layer parameter dl-UL-TransmissionPeriodicity. For example, the period 801 is P milliseconds. For example, the period 801 is P+P ２ For example, the period 801 is P ２The period 801 may be milliseconds. The period 801 may include a downlink slot 802, a downlink slot 803, a downlink slot 804, a flexible slot 805, and an uplink slot 806. The base station apparatus 100 may provide the terminal apparatus 200 with start timing 810 and end timing 811 of the UL subband 800 in the time domain. The start timing 810 may be the first symbol included in slot 803. The start timing 810 may be any symbol included in slot 803. The end timing 811 may be the last symbol included in slot 805. The end timing 811 may be any symbol included in slot 805. The symbols included in slot 803 that overlap with the UL subband 800, the symbols included in slot 804 that overlap with the UL subband 800, and the symbols included in slot 805 that overlap with the UL subband 800 may be SBFD symbols.

[0098] Bandwidth 808 is the bandwidth of UL subband 800. The sum of bandwidth 807, bandwidth 808, and bandwidth 809 may be the bandwidth of DL BWP. In the SBFD symbol, the bandwidth corresponding to bandwidth 807 may be the DL subband. In the SBFD symbol, the bandwidth corresponding to bandwidth 809 may be the DL subband. The DL subband may include a guard band.

[0099] Here, a flow up to when a terminal in which SBFD is set transmits data will be described in embodiment 1. Fig. 9 is a sequence diagram of the wireless communication system 1 in this embodiment.

[0100] The transmitter 111 of the base station device 100 transmits a first signal including first information regarding the SBFD configuration and second information regarding the uplink channel configuration to the terminal device 200 (step S60). Note that the first information regarding the SBFD configuration may also be referred to as first information configuring a UL subband. The first information and the second information may be transmitted by different signals. Note that the first signal is, for example, a signal of a higher layer or a signal of an RRC layer. The second information regarding the uplink channel configuration may be, for example, information regarding the uplink control channel configuration or information regarding the random access channel configuration.

[0101] The control unit 220 of the terminal device 200 performs a first process of setting SBFD in accordance with the information related to the setting of SBFD (step S70). When setting SBFD, the control unit 220 of the terminal device 200 adjusts the uplink resources to be located on the uplink subband, for example, by using an offset value. Details of the offset value will be described later.

[0102] The transmitter 211 of the terminal device 200 transmits an uplink signal on the uplink subband set by the first process (step S80).

[0103] 9, a signal indicating the completion may be transmitted after the SBFD configuration is completed. Furthermore, if the uplink signal transmitted in step S80 includes data, the receiving unit 212 of the terminal device 200 may receive a reception confirmation response to the uplink signal. Furthermore, before the transmission in step S80, a downlink signal may be received, and a response signal to the downlink signal (e.g., a PUCCH including information related to HARQ) may be transmitted as the third signal.

[0104] Step S60 in FIG. 9 corresponds to, for example, step S10 in FIG. 6, and the information transmitted in steps S60 and S10 may be transmitted together in the first signal.

[0105] Also, step S70 in Fig. 9 corresponds to, for example, the processing after receiving step S10 in Fig. 6. Also, step S80 in Fig. 9 corresponds to, for example, step S30 in Fig. 6.

[0106] Next, a method for controlling the position of an RO (RACH Occasion) will be described. In this example, the first signal transmitted in step S60 of FIG. 9 is, for example, a higher layer signal such as SIB1, and includes various higher layer parameters. The first process performed in step S70 of FIG. 9 is a process for adjusting the RO so that it is located on the UL subband. The second signal transmitted in step S80 of FIG. 9 is, for example, a random access signal (e.g., MSGA (Message A) or MSG1 (Message 1)). When the RO is configured on a UL symbol other than an SBFD symbol, the frequency domain position of the RO may be determined by a higher layer parameter msg1-FrequencyStart. The higher layer parameter msg1-FrequencyStart may be an offset from the start PRB index of the UL BWP. When the RO is configured on the UL subband included in the SBFD symbol, the frequency domain position of the RO may be determined by the upper layer parameter msg1-FrequencyStart and the upper layer parameter msg1-SBFDFrequenceStart. The upper layer parameter msg1-SBFDFrequenceStart may be an offset from the starting PRB index of the UL BWP. The upper layer parameter msg1-SBFDFrequenceStart may be an offset from the PRB index determined by the upper layer parameter msg1-FrequencyStart.

[0107] Next, in a flexible symbol and / or a flexible slot, when the terminal device 200 has configuration information for uplink transmission in an SBFD symbol and configuration information for uplink signals in symbols that are not SBFD symbols (non-SBFD symbols), the terminal device 200 may apply only the configuration information for uplink transmission in the SBFD symbol. The configuration information for uplink transmission may be information carried in higher layer parameters and / or DCI for transmission of an uplink channel and / or an uplink signal.

[0108] In a flexible symbol and / or flexible slot, when the terminal device 200 has configuration information for uplink transmission in an SBFD symbol and configuration information for uplink signals in symbols that are not SBFD symbols (non-SBFD Symbol), the terminal device 200 may apply only the configuration information for uplink transmission in symbols that are not SBFD symbols.

[0109] In a flexible symbol and / or flexible slot, when the terminal device 200 has configuration information for uplink transmission in an SBFD symbol and configuration information for uplink signals in symbols that are not SBFD symbols (non-SBFD symbols), the terminal device 200 may apply the configuration information for uplink transmission in an SBFD symbol and the configuration information for uplink transmission in symbols that are not SBFD symbols.

[0110] Next, in a flexible symbol and / or a flexible slot, when the terminal device 200 has configuration information for downlink transmission in an SBFD symbol and configuration information for downlink signals in symbols other than the SBFD symbol (non-SBFD symbol), the terminal device 200 may apply only the configuration information for downlink transmission in the SBFD symbol. The configuration information for downlink transmission may be information carried in a downlink channel and / or higher layer parameters for transmission of the downlink signal and / or DCI.

[0111] In a flexible symbol and / or flexible slot, when the terminal device 200 has configuration information for downlink transmission in an SBFD symbol and configuration information for downlink signals in symbols that are not SBFD symbols (non-SBFD Symbol), the terminal device 200 may apply only the configuration information for downlink transmission in symbols that are not SBFD symbols.

[0112] In a flexible symbol and / or flexible slot, when the terminal device 200 has configuration information for downlink transmission in an SBFD symbol and configuration information for downlink signals in symbols that are not SBFD symbols (non-SBFD symbols), the terminal device 200 may apply the configuration information for downlink transmission in an SBFD symbol and the configuration information for downlink transmission in symbols that are not SBFD symbols.

[0113] Here, the problem regarding RA-RNTI with respect to RO on SBFD symbols and RO on non-SBFD symbols will be described in detail. In the description, the terminal device 200A will be described as the terminal device 200 in which SBFD is not configured, and the terminal device 200B will be described as the terminal device 200 in which SBFD is configured. The terminal device 200 in which SBFD is not configured is, for example, the terminal device 200 that does not have a function corresponding to SBFD. In short, the terminal device 200 in which SBFD is not configured and the terminal device 200 in which SBFD is configured can be described as terminals with different UE capabilities.

[0114] The terminal device 200A may receive second information regarding the configuration of a random access channel, which is information for configuring an RO on a non-SBFD symbol, and configure an RO using the second information. The terminal device 200B may receive second information regarding the configuration of a random access channel, which is information for configuring an RO on a non-SBFD symbol, and configure an RO using the second information. Furthermore, the terminal device 200B may receive third information regarding the configuration of a random access channel, which is information for configuring an RO on an SBFD symbol, and configure an RO using the third information. The terminal device 200A may map an SSB to an RO configured using the second information. The terminal device 200B may map an SSB to an RO configured using the third information. Note that the RO configured on a non-SBFD symbol is an example of a first RO. Also, the RO configured on an SBFD symbol is an example of a second RO.

[0115] FIG. 10 is a diagram showing an example of mapping SSB to ROs on SBFD symbols and ROs on non-SBFD symbols in this embodiment. In FIG. 10, one RO is frequency-multiplexed in the terminal device 200A according to higher layer parameters, and one RO is frequency-multiplexed in the terminal device 200B. Note that RO 1001 may be configured in the terminal device 200A, and RO 1002 may be configured in the terminal device 200B. Here, RO 1002 may be an RO configured on the UL subband. The terminal device 200A may not recognize that RO 1002 has been configured. The terminal device 200B may or may not recognize that RO 1001 has been configured. Furthermore, the terminal device 200A may not recognize that UL subband 1000 has been configured. The terminal device 200B may recognize that the UL subband 1000 has been configured. The RO 1001 may be configured by second information regarding the configuration of the random access channel. The RO 1002 may be configured by third information regarding the configuration of the random access channel.

[0116] Since an RO is configured with independent parameters in each terminal device, f_id may be assigned in ascending order of frequency from among ROs recognizable by each terminal device. That is, f_id of RO 1001 in the terminal device 200A may be 0. Also, f_id of RO 1002 in the terminal device 200B may be 0. An index may be assigned to f_id for each piece of configuration information configuring an RO. An index may be assigned to f_id for each piece of information related to the configuration of a random access channel. An independent index may be assigned to each RO configured by second information related to the configuration of a random access channel and third information related to the configuration of a random access channel.

[0117] When the terminal device 200A transmits the PRACH on the RO 1001 and ul_carrier_id is 0, for example, the RA-RNTI is 1+0+14×58+14×80×0+14×80×8×0=813 according to formula 1. Also, as shown in FIG. 7, when ul_carrier_id is 0, for example, when the terminal device 200A transmits the PRACH in an RO in which f_id configured in the 25th slot (t_id=24) is 1, the RA-RNTI is 1+0+14×24+14×80×1+14×80×8×0=1457 according to formula 1.

[0118] When the terminal device 200B transmits the PRACH on the RO 1002 and ul_carrier_id is 0, for example, the RA-RNTI is 1+0+14×58+14×80×0+14×80×8×0=813 according to formula 1. Also, as shown in FIG. 7, when ul_carrier_id is 0, for example, when the terminal device 200B transmits the PRACH in an RO in which f_id is 1 configured in the 25th slot (t_id=24), the RA-RNTI is 1+0+14×24+14×80×1+14×80×8×0=1457 according to formula 1.

[0119] As shown in the example of Fig. 10, the RA-RNTI corresponding to each PRACH transmitted in an RO on the UL subband and an RO other than the UL subband may have the same value. If the terminal device 200B that transmitted the PRACH in an RO on the UL subband and the terminal device 200A that transmitted the PRACH in an RO other than the UL subband have the same RA-RNTI, the PDCCH that schedules the RAR may be scrambled with the RA-RNTI, and the terminal device 200A and / or the terminal device 200B may receive the same RAR. When the base station device 100 transmits an RAR for the terminal device 200B and the terminal device 200A receives the RAR, a problem occurs in which the terminal device 200A attempts to transmit Msg3 scheduled by the RAR on a downlink symbol. When the base station device 100 transmits an RAR for the terminal device 200A and the terminal device 200B receives the RAR, the terminal device 200B transmits Msg3 in an uplink symbol in which a UL subband is not configured. However, since the base station device 100 that receives the Msg3 does not receive the Msg3 from the terminal device 200A that was originally scheduled, the random access procedure may fail.

[0120] Hereinafter, a method of the random access procedure when using RO configured on the UL subband to reduce the possibility of failure of the random access procedure will be described. Note that by using the following five examples, the terminal device 200 can determine whether Msg2 is addressed to the terminal device 200.

[0121] (First Example) The terminal device 200B transmitting the PRACH via RO on the UL subband may set ul_carrier_id to an integer other than 0 and 1 when calculating the RA-RNTI. For example, the terminal device 200B transmitting the PRACH via RO on the UL subband may set ul_carrier_id to 2 when calculating the RA-RNTI. In the example of Fig. 10 , when the terminal device 200B transmits the PRACH on RO 1002 and sets ul_carrier_id to 2, for example, the RA-RNTI is calculated by Equation 1 as follows: 1 + 0 + 14 × 58 + 14 × 80 × 0 + 14 × 80 × 8 × 2 = 18733. Also, in the example of Figure 7, when ul_carrier_id is 0 and the terminal device 200B transmits a PRACH with an RO having an f_id of 1 configured in the 25th slot, the RA-RNTI is, for example, 1 + 0 + 14 x 24 + 14 x 80 x 1 + 14 x 80 x 8 x 0 = 19377 according to equation 1.

[0122] In short, in the first example, by setting an integer on the SBFD symbols to ul_carrier_id, the RA-RNTIs corresponding to the PRACHs transmitted in the RO on the UL subband and the RO other than the UL subband are less likely to have the same value, thereby reducing the possibility of failure of the random access procedure.

[0123] (Second Example) The terminal device 200B transmitting a PRACH via an RO on the UL subband may apply an f_id allocation method different from that of the terminal device 200A. The initial value of f_id in the terminal device 200B may be a value obtained by adding 1 to the maximum value of f_id configured in the terminal device 200A. For example, when two ROs are frequency-multiplexed in the terminal device 200A and three ROs are frequency-multiplexed in the terminal device 200B, the f_id of the terminal device 200A may be 0 or 1, and the f_id of the terminal device 200B may start from 2, which is the value obtained by adding 1 to the maximum value of f_id of the terminal device 200A, that is, 1. In other words, when the f_id of the terminal device 200A is 0 or 1, the f_id of the terminal device 200B may be 2, 3, or 4. In the example of Figure 10, if the f_id of RO1001 configured in terminal device 200A is 0, the f_id of RO1002 configured in terminal device 200B may be 1, which is the maximum value of the f_id of the RO configured in terminal device 200A plus 1.

[0124] In short, in the second example, f_id (f in Equation 1) ｉｄ ), by setting a value equal to or greater than f_id, which is the maximum value of ROs other than the UL subband, to the RO on the UL subband, the RA-RNTIs corresponding to the PRACHs transmitted in the RO on the UL subband and the ROs other than the UL subband are less likely to have the same value. Therefore, it is possible to reduce the possibility of failure of the random access procedure.

[0125] (Third Example) In one or more OFDM symbols in which an RO configured in the terminal device 200A exists, the terminal device 200B may not set an RO in the OFDM symbol. In one or more OFDM symbols in which an RO configured in the terminal device 200A exists, the terminal device 200B may set an RO configured in the OFDM symbol by the third information to an invalid RO.

[0126] In short, in the third example, the terminal device 200B controls the ROs other than the UL subband so that they do not overlap on the time axis with the ROs on the UL subband, thereby reducing the possibility of failure of the random access procedure.

[0127] (Fourth Example) The base station device 100 may configure a first CORESET and a first search space including a PDCCH to be transmitted to the terminal device 200A, and a second CORESET and a second search space including a PDCCH to be transmitted to the terminal device 200B. The terminal device 200A may receive a PDCCH for scheduling Msg2 using the first CORESET and the first search space. The terminal device 200B may receive a PDCCH for scheduling Msg2 using the second CORESET and the second search space. The first CORESET and the second CORESET may have different periods and / or resources. The first search space and the second search space may have different periods and / or resources.

[0128] In short, in the fourth example, different CORESETs are set in the terminal device 200A and the terminal device 200B. By doing so, for example, the terminal device 200A cannot receive and process Msg2 transmitted from the base station device 100 in response to the PRACH transmitted by the terminal device 200B. On the other hand, for example, the terminal device 200A can receive and process Msg2 transmitted from the base station device 100 in response to the PRACH transmitted by the terminal device 200A. Therefore, it is possible to reduce the possibility of failure of the random access procedure. Note that the information transmitted on the PDCCH is, for example, control information accompanying a response signal.

[0129] (Fifth Example) The base station device 100 may include information indicating whether the RAR is addressed to the terminal device 200B in the RAR. The RAR may be a MAC CE (Medium Access Control Element). When the terminal device 200B receives the RAR and indicates that the information is addressed to the terminal device 200B, the terminal device 200B may apply an offset to the frequency domain resource assignment (FDRA) and / or the time domain resource assignment (TDRA) of msg3 included in the RAR. The offset may be provided by the base station device 100. The offset may also be an integer. When applying an offset to the TDRA, the terminal device 200B may apply the offset to some or all of {PUSCH Mapping Type, transmission slot position, first OFDM symbol index at which msg3 is transmitted, number of OFDM symbols at which msg3 is transmitted} required for transmitting msg 3. Furthermore, the terminal device 200B may apply an offset to a Start and Length Indicator Value (SLIV) derived based on {PUSCH Mapping Type, transmission slot position, first OFDM symbol index at which msg3 is transmitted, number of OFDM symbols at which msg3 is transmitted}. When applying an offset to FDRA, the terminal device 200B may apply the offset to some or all of {the starting RB index to which msg3 is mapped, the number of RBs (resource blocks) to which msg3 is mapped, and the number of RBs of the BWP transmitting msg3} required for transmitting msg3. Furthermore, the terminal device 200B may apply an offset to a Resource Indication Value (RIV) derived based on {the starting RB index to which msg3 is mapped, the number of RBs (resource blocks) to which msg3 is mapped, and the number of RBs of the BWP transmitting msg3}.

[0130] In short, in the fifth example, by including information indicating whether the RAR is addressed to the terminal device 200B in the RAR transmitted from the base station device 100, it is possible to identify the terminal device 200 that is the target of the RAR. Therefore, it is possible to reduce the possibility of failure of the random access procedure. Note that the RAR information indicating whether the RAR is addressed to the terminal device 200B is control information accompanying a response signal. Also, in the fifth example, an example was shown in which control information was included in the RAR, but it may also be included in, for example, DCI (Downlink Control Information) transmitted on the PDCCH that schedules the RAR.

[0131] The first to fifth examples may be combined as appropriate within the scope of no contradiction.

[0132] As described above, in the first embodiment, the terminal device 200 determines whether a signal is a response signal to a PRACH according to at least one of the RA-RNTI or the control information associated with the response signal. For example, some parameters in Equation 1 for determining the RA-RNTI are set to dedicated parameters when an RO on the UL subband is used, so that the RA-RNTI has different values ​​for an RO other than the UL subband and an RO on the UL subband. Also, for example, the terminal device 200 can determine whether a response signal is addressed to its own device according to information indicating whether the signal is addressed to the terminal device 200B, which is an example of control information associated with the response signal. As a result, the terminal device 200 reduces the probability of erroneous recognition of Msg2, and can therefore improve the success probability of the random access procedure when an RO configured on the UL subband and an RO configured other than on the UL subband are configured. Hardware configuration of each device in each embodiment

[0133] The hardware configuration of each device in the wireless communication system of each embodiment will be described with reference to FIGS.

[0134] Fig. 11 is a diagram showing an example of the hardware configuration of a base station device 100 according to this embodiment. As shown in Fig. 11, the base station device 100 has, as hardware components, for example, an RF (Radio Frequency) circuit 320 equipped with an antenna 310, a CPU (Central Processing Unit) 330, a DSP (Digital Signal Processor) 340, a memory 350, and a network IF (Interface) 360. The CPU is connected via a bus so as to enable input and output of various signals and data signals. The memory 350 includes at least one of a RAM (Random Access Memory) such as an SDRAM (Synchronous Dynamic Random Access Memory), a ROM (Read Only Memory), and a flash memory, and stores programs, control information, and data signals.

[0135] The correspondence between the functional configuration of the base station device 100 shown in Fig. 2 and the hardware configuration of the base station device 100 shown in Fig. 11 will be described. The transmitter 111 and receiver 112 (or communication unit 140) are realized by, for example, an RF circuit 320, or an antenna 310 and an RF circuit 320. The control unit 120 is realized by, for example, a CPU 330, a DSP 340, a memory 350, a digital electronic circuit (not shown), etc. Examples of the digital electronic circuit include an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programming Gate Array), and an LSI (Large Scale Integration).

[0136] In addition, in the base station apparatus 100, a plurality of data signals to be transmitted in a plurality of subbands can be generated, and the filters that generate these signals may be configured independently for each subband.

[0137] Fig. 12 is a diagram showing an example of the hardware configuration of the terminal device 200 in this embodiment. As shown in Fig. 12, the terminal device 200 has, as hardware components, an RF circuit 420 including an antenna 410, a CPU 430, a DSP 440, and a memory 450. The terminal device 200 may further have a display device such as an LCD (Liquid Crystal Display) connected to the CPU 430. The memory 450 includes at least one of a RAM such as an SDRAM, a ROM, and a flash memory, and stores programs, control information, and data signals.

[0138] The correspondence between the functional configuration of the terminal device 200 shown in Fig. 3 and the hardware configuration of the terminal device 200 shown in Fig. 12 will be described. The transmitter 211 and receiver 212 (or communication unit 210) are realized by, for example, an RF circuit 420, or an antenna 410 and an RF circuit 420. The control unit 220 is realized by, for example, a CPU 430, a DSP 440, a memory 450, a digital electronic circuit (not shown), etc. Examples of the digital electronic circuit include an ASIC, an FPGA, and an LSI.

[0139] In each embodiment, examples of a base station, a terminal, and a repeater are described, but the disclosed technology is not limited to these and can be applied to various devices, such as electronic devices mounted on automobiles, trains, airplanes, artificial satellites, etc., electronic devices transported by drones, etc., robots, AV equipment, home appliances, office equipment, vending machines, and other household equipment.

[0140] Furthermore, although the embodiments have been described using fifth-generation mobile communications as an example, the application of the disclosed technology is not limited to this. For example, the disclosed technology may be applied to mobile communications of different generations, such as sixth and seventh generations.

[0141] 1 Wireless communication system 100 100A 100B Base station device C10 C11 Cell 110 Wireless communication unit 111 Transmitter 112 Receiver 120 Control unit 130 Memory unit 140 Communication unit 200 Terminal device 210 Communication unit 211 Transmitter 212 Receiver 220 Control unit 230 Memory unit 310 Antenna 320 RF circuit 330 CPU 340 DSP 350 Memory 360 Network IF 410 Antenna 420 RF circuit 430 CPU 440 DSP 450 Memory

Claims

1. A terminal device comprising: a receiver that receives first information constituting a first RO (RACH Occasion) using resources other than an UL subband, and second information constituting a second RO on the UL subband; a transmitter that transmits a PRACH (Physical Random Access Channel) via either the first RO or the second RO; and a controller that determines a Random Access-Radio Network Temporary Identifier (RA-RNTI) based on the RO that transmitted the PRACH, wherein the controller determines whether the signal is a response signal to the PRACH in accordance with at least one of the RA-RNTI and control information associated with the response signal.

2. The terminal device of claim 1, wherein the first RA-RNTI determined based on the first RO is determined using a first frequency identifier and a first uplink carrier identifier, and the second RA-RNTI calculated based on the second RO is determined using a second frequency identifier and a second uplink carrier identifier.

3. The terminal device according to claim 2, wherein the first frequency identifier and the second frequency identifier have different values.

4. The terminal device according to claim 2, wherein the first uplink carrier identifier and the second uplink carrier identifier have different values.

5. The terminal device according to claim 1, wherein the receiving unit receives the control information for scheduling the response signal via a PDCCH, and the PDCCH is scrambled with the RA-RNTI.

6. The terminal device according to claim 1, wherein the control information is information indicating whether the response signal is a signal intended for the terminal device that constitutes the second RO.

7. A radio access point (RAP) comprising: a transmitter that transmits first information constituting a first RO (RACH Occasion) using resources other than a UL subband, and second information constituting a second RO on the UL subband; a receiver that receives a PRACH (Physical Random Access Channel) from a first terminal via either the first RO or the second RO; and a controller that determines a Random Access-Radio Network Temporary Identifier (RA-RNTI) based on the RO that received the PRACH, wherein the controller controls the first terminal to determine whether the signal is a response signal to the PRACH according to at least one of the RA-RNTI and control information associated with the response signal. Base station equipment.

8. A wireless communication system comprising: a base station device that transmits first information constituting a first RO (RACH Occasion) using resources other than a UL subband, and second information constituting a second RO on the UL subband; and a terminal device that transmits a PRACH (Physical Random Access Channel) via either the first RO or the second RO, and determines an RA-RNTI (Random Access-Radio Network Temporary Identifier) ​​based on the RO that transmitted the PRACH, wherein the terminal device determines whether the signal is a response signal to the PRACH based on at least one of the RA-RNTI and control information associated with the response signal.

Images