Terminal, wireless communication method and base station

Abstract

A terminal according to an aspect of the present disclosure comprises: a reception unit that receives information related to a schedule by use of downlink control information specific to the terminal or group-common downlink control information; a transmission unit that transmits, to another terminal, information related to at least some of UL data; and a control unit that controls to perform the transmission of the UL data in collaboration with the other terminal on the basis of the information related to the schedule.

Description

[Technical field]

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] Existing systems (e.g., LTE systems) support MIMO (Multi-Input Multi-Output) systems as a wireless communication technology that transmits and receives data using multiple antennas and improves data rates (spectral efficiency). In a MIMO system, multiple transmit / receive antennas are provided on the transceiver, and different transmission information sequences are transmitted simultaneously from different transmit antennas.

[0005] In addition, in a MIMO system, there are specified Single User MIMO (SU-MIMO (Single User MIMO)), in which transmission information sequences simultaneously transmitted from different transmitting antennas are all for the same user, and Multi User MIMO (MU-MIMO (Multiple User MIMO)), in which transmission information sequences are for different users. [Prior art documents] [Non-patent literature]

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

[0007] In future wireless communication systems (eg, NR), it is being considered to extend the MIMO system to perform communication.

[0008] For example, it is assumed that UL transmission from a certain terminal will be performed using antennas / antenna ports of multiple terminals including the terminal (UE cooperative MIMO).

[0009] However, there has been little consideration on how to control communications using multiple UE antennas / antenna ports.

[0010] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control communication even when communication is performed using antennas / antenna ports of multiple UEs. [Means for solving the problem]

[0011] A terminal according to an embodiment of the present disclosure includes a receiving unit that receives information related to a schedule by terminal-specific downlink control information or group common downlink control information, a transmitting unit that transmits information related to at least a part of UL data to other terminals, and a control unit that controls the transmission of the UL data in cooperation with the other terminals based on the information related to the schedule. The receiving unit receives first parameter information used for transmitting information related to at least a part of the UL data and second parameter information used for transmitting the UL data by using different downlink control information, and between terminals that transmit the UL data in cooperation with each other, the first parameter information is set to the same content and the second parameter information is set to different content. It is characterized by: Effect of the Invention

[0012] According to one embodiment of the present disclosure, even when communication is performed using antennas / antenna ports of a plurality of UEs, communication can be appropriately controlled. [Brief description of the drawings]

[0013] [Figure 1] 1A and 1B are diagrams illustrating an example of MU-MIMO and UE collaborative MIMO. [Diagram 2] FIG. 2 is a diagram illustrating an example of antenna ports for UE collaborative MIMO. [Diagram 3] FIG. 3 is a diagram illustrating an example of a synchronization signal in the UE cooperative MIMO according to the first embodiment. [Figure 4] 4A and 4B are diagrams illustrating an example of communication control in UE cooperative MIMO according to the second embodiment. [Diagram 5] FIG. 5 is a diagram showing another example of communication control in UE cooperative MIMO according to the second embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of resource allocation in UE collaborative MIMO according to the third embodiment. [Figure 7] 7A and 7B are diagrams illustrating an example of communication control in UE cooperative MIMO according to the fourth embodiment. [Figure 8] 8A and 8B are diagrams showing another example of communication control in UE cooperative MIMO according to the fourth embodiment. [Figure 9] 9A and 9B are diagrams illustrating another example of communication control in UE cooperative MIMO according to the fourth embodiment. [Figure 10] 10A and 10B are diagrams illustrating an example of DCI used in UE cooperative MIMO according to the fourth embodiment. [Figure 11] FIG. 11 is a diagram showing another example of communication control in UE cooperative MIMO according to the fourth embodiment. [Figure 12] FIG. 12 is a diagram showing another example of communication control in UE cooperative MIMO according to the fourth embodiment. [Figure 13] 13A and 13B are diagrams illustrating an example of control of information sharing between UEs in UE cooperative MIMO according to the fifth embodiment. [Figure 14] FIG. 14 is a diagram illustrating another example of control of information sharing between UEs in UE cooperative MIMO according to the fifth embodiment. [Figure 15] FIG. 15 is a diagram illustrating another example of control of information sharing between UEs in UE collaborative MIMO according to the fifth embodiment. [Figure 16] 16A and 16B are diagrams illustrating another example of control of information sharing between UEs in UE collaborative MIMO according to the fifth embodiment. [Figure 17] 17A and 17B are diagrams illustrating another example of control of information sharing between UEs in UE collaborative MIMO according to the fifth embodiment. [Figure 18] 18A and 18B are diagrams illustrating an example of SRS transmission in UE collaborative MIMO according to the sixth embodiment. [Figure 19] FIG. 19 is a diagram illustrating an example of SRS transmission and PUSCH transmission in UE collaborative MIMO according to the sixth embodiment. [Figure 20] FIG. 20 is a diagram showing another example of SRS transmission and PUSCH transmission in UE collaborative MIMO according to the sixth embodiment. [Figure 21] FIG. 21 is a diagram showing another example of SRS transmission and PUSCH transmission in UE collaborative MIMO according to the sixth embodiment. [Figure 22] FIG. 22 is a diagram showing another example of SRS transmission and PUSCH transmission in UE collaborative MIMO according to the sixth embodiment. [Diagram 23] FIG. 23 is a diagram illustrating an example of retransmission control in UE cooperative MIMO according to the seventh embodiment. [Figure 24] FIG. 24 is a diagram illustrating another example of retransmission control in UE cooperative MIMO according to the seventh embodiment. [Diagram 25] FIG. 25 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 26] FIG. 26 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 27] FIG. 27 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 28] FIG. 28 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] (MIMO extension) In future wireless communication systems, it is being considered to increase the number of terminal antennas / antenna ports (hereinafter also referred to as antenna ports) to improve communication throughput. However, when increasing the number of antenna ports in a UE, distance between the antenna ports is required, so the increase in the number of antenna ports is limited by factors such as the size of the UE.

[0015] When increasing the number of antenna ports per UE is restricted, it is expected that UE cooperative MIMO (e.g., UE corporative MIMO), Tx / Rx diversity, multi-user MIMO (MU-MIMO enhancement), etc. will be used to improve UE throughput / cell capacity.

[0016] When applying UE cooperative MIMO, even if there is an upper limit on the number of antenna ports due to constraints such as UE size, it is possible to increase the apparent number of antenna ports by using antenna ports of multiple UEs. It is also stipulated that spatial correlation is reduced by using antenna ports in different positions (or different antenna port numbers 9). UE cooperative MIMO may be read as UE joint MIMO, UE corporative MIMO, UE cooperative transmission, UE cooperative reception, UE cooperative reception, etc.

[0017] When four antenna ports (or four ranks / four layers) are used in communication between a base station and multiple UEs, MU-MIMO is equivalent to SU-MIMO with rank 2 per UE (see Figure 1A). In contrast, UE cooperative MIMO is equivalent to SU-MIMO with rank 4 (or a virtual four-port antenna) (see Figure 1B).

[0018] For example, in UE cooperative MIMO (e.g., FIG. 1B), data of rank 4 (e.g., DL data / DL-SCH) for UE#1 may be transmitted to UE#1-UE#2, and the data may be transferred from UE#2 to UE#1. This allows UE#1 to receive data equivalent to four antenna ports even if it has only two antenna ports.

[0019] Alternatively, in UE cooperative MIMO (e.g., FIG. 1B), data (e.g., UL data / UL-SCH) of UE#1 may be transmitted from UE#1-UE#2. This allows UE#1 to transmit data equivalent to four antenna ports (virtual four-port antennas) even if it has only two antenna ports.

[0020] In this way, it is assumed that UL transmission / DL reception of a certain terminal will be performed using the antennas / antenna ports of multiple terminals including the terminal itself (UE cooperative MIMO). This makes it possible to communicate using more antenna ports than the number of antenna ports supported by the terminal itself (see Figure 2). Figure 2 shows an example of communication using four antenna ports (virtual four antenna ports) by cooperation between UEs each having two antenna ports.

[0021] However, there has been no sufficient consideration as to how to control communications (eg, UL transmission processing / DL reception processing) using antenna ports of multiple UEs.

[0022] For example, the problem is how to align synchronization (e.g., carrier frequency / phase / transmission timing) between UEs. Or, the problem is how to share data / control information between UEs. Or, the problem is how to control schedule / retransmission when transmitting using UE cooperative MIMO. Or, the problem is how to set the beam / TCI state / spatial relationship applied (or corresponding / associated) to each antenna port. Or, the problem is how to control retransmission when using UE cooperative MIMO.

[0023] Therefore, the present inventors have considered UE operation / base station operation to solve at least one of the above problems and have come up with the idea of ​​this embodiment.

[0024] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The wireless communication method (or UE operation / base station operation) according to each embodiment may be applied independently or in combination.

[0025] In the present disclosure, "A / B" and "at least one of A and B" may be read as interchangeable. Similarly, in the present disclosure, "A / B / C" and "at least one of A, B, and C" may be read as interchangeable. In the present disclosure, cell, serving cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, band may be read as interchangeable. In the present disclosure, index, ID, indicator, resource ID may be read as interchangeable. In the present disclosure, support, control, controllable, operate, and operable may be read as interchangeable.

[0026] In the present disclosure, the terms configure, activate, update, indicate, enable, specify, and select may be read as interchangeable.

[0027] In this disclosure, the words use, determine, apply, and select may be interpreted interchangeably.

[0028] In this disclosure, link, associate, correspond, and map may be read as interchangeable. In this disclosure, allocate, assign, monitor, and map may be read as interchangeable.

[0029] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof. In the present disclosure, RRC, RRC signaling, RRC parameters, higher layer, higher layer parameters, RRC information elements (IEs), and RRC messages may be read as interchangeable.

[0030] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0031] In the present disclosure, delivery confirmation information, HARQ-ACK, HARQ-ACK / NACK, HARQ-ACK information, HARQ, ACK / NACK, ACK, NACK, NACK only, and UCI may be interpreted as interchangeable.

[0032] In the present disclosure, specific, dedicated, UE specific, and UE individual may be read as interchangeable.

[0033] In the present disclosure, common, shared, group-common, UE common, and UE shared may be read as interchangeable.

[0034] In the present disclosure, a UE-specific DCI and a DCI having a CRC scrambled by a UE-specific RNTI may be read as interchangeable. The UE-specific RNTI may be, for example, a C-RNTI.

[0035] In the present disclosure, a UE common DCI and a DCI having a CRC scrambled by a UE common RNTI may be interpreted as interchangeable. The UE common RNTI may be, for example, a multicast-RNTI.

[0036] In the following description, a case where two UEs (UE#1 and UE#2) perform cooperative transmission is shown, but the number of UEs performing cooperative transmission may be three or more. In the following description, a case where each UE includes two antenna ports is shown, but the number of antenna ports included in each UE is not limited to this. UE#1 and UE#2 may include the same number of antenna ports, or may include different numbers of antenna ports. In the following description, cooperative transmission in UL is taken as an example, but is not limited to this. A similar mechanism may also be applied to the case where multiple UEs transmit DL data cooperatively.

[0037] (First embodiment) The UE may control synchronization between UEs / antenna ports based on a predetermined synchronization signal.

[0038] When a UE performing UE cooperative transmission receives a predetermined synchronization signal, the UE may control synchronization with other UEs / synchronization with antenna ports of other UEs based on the predetermined synchronization signal. In the present disclosure, a UE performing UE cooperative transmission may be interpreted as a UE in which predetermined higher layer parameters (e.g., parameters for UE cooperative MIMO) are set, or a UE that supports UE cooperative transmission.

[0039] The predetermined synchronization signal may be transmitted / set periodically or aperiodically. The predetermined synchronization signal may be transmitted in a resource or an occasion (see FIG. 3). The resource may be read as a transmission resource, a reception resource, or a measurement resource. The occasion may be read as a transmission occasion, a reception occasion, or a measurement occasion.

[0040] The resource / occasion of the synchronization signal may be notified / configured from the base station to the UE using higher layer signaling or the like. The UE may control reception of a predetermined synchronization signal based on the resource / occasion notified from the base station. The predetermined synchronization signal may be always transmitted on the configured resource / occasion, or may be transmitted on some of the multiple configured resources / occasions (or resource candidates / occasion candidates).

[0041] When the UE receives the synchronization signal, the UE may control to perform synchronization (time / frequency synchronization) after a predetermined time has elapsed. The predetermined time may be defined in the specifications, may be notified / set to the UE by the base station through higher layer signaling, or may be determined based on the reported UE capability information.

[0042] The UE may control synchronization using multiple synchronization signals, or may control synchronization using one synchronization signal. For example, when multiple synchronization signals are used, the UE may control synchronization by applying an averaging process to the reception results of multiple synchronization signals received in the past. When one synchronization signal is used, the UE may control synchronization every time a synchronization signal is received.

[0043] The predetermined synchronization signal may be transmitted from a network (e.g., a base station). Alternatively, the predetermined synchronization signal may be transmitted from another UE / antenna port of another UE. The other UE may be a cooperating UE or a paired UE when cooperative transmission / cooperative reception is performed between UEs / antenna ports.

[0044] The synchronization signal may be a channel / signal (e.g., SSB / TRS / CSI-RS) of an existing system (e.g., before Rel. 16) or a new channel / signal. In addition, the synchronization signal used for synchronization between the base station and the UE and the synchronization signal used for synchronization among multiple UEs may be set in common or separately.

[0045] When a UE receives / detects a synchronization signal in a resource / occasion used to transmit the synchronization signal, the UE may use the received / detected synchronization signal to determine the timing of cooperative transmission / cooperative reception between UEs / antenna ports.

[0046] The resource / occasion of the synchronization signal may be a resource / occasion for synchronization between the base station and the UE, or may be a resource / occasion for synchronization between the UE and the UE (antenna port-to-antenna port). Alternatively, both the resource / occasion for synchronization between the base station and the UE and the resource / occasion for synchronization between the UE and the UE (antenna port-to-antenna port) may be set.

[0047] In this way, by using a synchronization signal to synchronize a UE (or an antenna port of a UE) with another UE (or an antenna port of another UE), it is possible to appropriately control UE cooperative MIMO.

[0048] Second Embodiment The UE may control to share predetermined information with other UEs to which UE cooperative MIMO is applied. The predetermined information may be at least one of transmission data, control information, and channel state information. The transmission data may be interpreted as transmission data information, UL data, DL data, UL-SCH, or DL-SCH.

[0049] In the following description, the case where transmission data (or PUSCH / UL data / UL-SCH) is transmitted in UE cooperative MIMO will be taken as an example, but the same can be applied to the case where other UL signals / UL channels (e.g., uplink control information / PUCCH) are transmitted in a cooperative manner.

[0050] 4A and 4B show an example of a case where a first UE (UE#1) and a second UE (UE#2) perform UL transmission in cooperation. In FIG. 4A, UE#1 uses antenna ports #0 and #1, and UE#2 uses antenna ports #2 and #3, and transmits using a virtual four-port antenna. Note that the number of antenna ports of each UE (here, two each), the number of ranks / layers used for cooperative transmission (here, four), and the number of UEs performing cooperative transmission (here, two) are not limited to the above.

[0051] In Fig. 4B, the base station transmits information regarding an UL transmission instruction to the UE. In the present disclosure, the information regarding the UL transmission instruction may be read as information regarding the scheduling of UL transmission, information regarding the trigger of UL transmission, an UL grant, or a DL assignment (in the case of cooperative reception in DL).

[0052] Here, a case is shown in which UE#1's transmission data (e.g., a part of the transmission data) is also transmitted from UE#2. In this case, information related to UE#1's transmission data may be reported / notified / transferred / shared (hereinafter also referred to as transfer / information sharing) to UE#2. In other words, information related to UE#1's transmission data is shared between UE#1 and UE#2.

[0053] The transmission data of UE#1 may be interpreted as UL data / UL-SCH corresponding to UE#1, or UL data / UL-SCH for UE#1. Note that UL data / UL-SCH may be interpreted as UL control information / UCI.

[0054] Information sharing between UE#1 and UE#2 may be performed by transmitting / notifying predetermined information from UE#1 to UE#2. Existing communication methods such as unlicensed bands (or shared spectrum), WiFi, Bluetooth (registered trademark), etc. may be applied for information sharing. For example, in FIG. 4B, UE#1 may transfer / share predetermined information with UE#2 using a higher layer. That is, higher layer signaling may be used in communication between UEs.

[0055] Alternatively, information may be shared between UE#1 and UE#2 as a periodic report set by the base station. Alternatively, information may be shared between UE#1 and UE#2 as a non-periodic report triggered by the base station. Alternatively, information may be shared between UE#1 and UE#2 autonomously. Alternatively, each UE may be configured to instruct / command other UEs to report or share predetermined information.

[0056] Alternatively, based on specifications supported by D2D (e.g., physical layer specifications / RAN1 specifications), information may be shared between UEs using a channel for D2D, and coordinated transmission may be performed between multiple UEs using the shared information.

[0057] In FIG. 4B, a case where the transmission data of UE#1 (e.g., a part of the transmission data) is transmitted from UE#2 is shown, but this is not limited thereto. The transmission data of UE#2 (e.g., a part of the transmission data) may be transmitted from UE#1. In this case, information sharing / information provision from UE#2 to UE#1 may be performed (see FIG. 5).

[0058] 5 shows a case where information on UE#1's transmission data (e.g., a part of the transmission data) is transferred from UE#1 to UE#2, and information on UE#2's transmission data (e.g., a part of the transmission data) is transferred from UE#2 to UE#1. The method of transferring the transmission data from UE#2 to UE#1 may be controlled in the same way as the method of transferring the transmission data from UE#1 to UE#2.

[0059] In this way, by performing cooperative transmission among a plurality of UEs after sharing information between them based on instructions from the base station, it is possible to appropriately control cooperative transmission.

[0060] (Third embodiment) When transmission / reception is performed using UE cooperative MIMO, certain parameters / configurations may be controlled to be shared between UEs / antenna ports. In this case, some parameters / configurations (e.g., a first parameter / configuration) may be set commonly between UEs / antenna ports, while other parameters / configurations (e.g., a second parameter / configuration) may be set separately (e.g., differently) between UEs / antenna ports.

[0061] The specified parameter / configuration may be at least one of a demodulation reference signal setting (e.g., DMRS setting or DMRS configuration), a number of layers / ranks (e.g., number of MIMO layers / MIMO ranks), a transmission signal resource, and a DMRS resource.

[0062] The DMRS configuration may be at least one of a DMRS symbol number in the time direction, whether or not an additional DMRS is inserted, and a DMRS type in the frequency direction (for example, type 1 or type 2).

[0063] The transmission signal resource (or resource) may be at least one of time, frequency, CDM / orthogonal code, sequence number, and cyclic shift number. The DMRS resource may be at least one of time, frequency, CDM / orthogonal code, sequence number, cyclic shift number, Comb index (e.g., Comb index), and CDM group index (e.g., CDM group index). Information on the transmission signal resource / DMRS resource may be dynamically notified to the UE from the base station using DCI when instructing (or scheduling) a transmission.

[0064] A network (e.g., a base station) may set a predetermined parameter / configuration to a predetermined UE by using higher layer / physical layer control information (e.g., DCI). The predetermined UE may be a plurality of UEs performing coordinated transmission, or may be a part of the UEs performing coordinated transmission (e.g., a UE corresponding to data to be transmitted (or a source UE of transmitted data)). The predetermined parameter / configuration may be set separately (e.g., for coordinated transmission) from normal transmission (e.g., UE-to-base station transmission).

[0065] When a certain parameter / configuration is set by higher layer / physical layer control information (e.g., DCI), the UE may assume that the same content is set in the UE / antenna port (e.g., paired UE / antenna port) that performs coordinated transmission. Alternatively, the UE may assume that the same content is set for some parameters / configurations and different content is set for other parameters / configurations.

[0066] Alternatively, when a certain parameter / configuration is set, the UE may notify / instruct the paired UE / antenna port of the same (or different) content. The notification to the paired UE / antenna port may be performed by applying the method used in the information sharing between UEs in the second aspect.

[0067] For example, the DMRS symbol number etc. may be set to be the same between multiple UEs (e.g., between UE#1 and UE#2), and the DMRS Comb index / CDM group index etc. may be set separately (e.g., differently) between multiple UEs. Transmission signal resources may be set to be overlapped between multiple UEs, or may be set separately (e.g., differently).

[0068] FIG. 6 is a diagram showing an example of resource configuration / resource allocation for UE#1 and UE#2 that transmit in cooperation. Here, a case is shown in which UE#1 transmits using antenna ports #0 and #1, and UE#2 transmits using antenna ports #2 and #3. Also, a case is shown in which the same contents are set as the first parameter / configuration (here, DMRS symbols) for UE#1 and UE#2, and different contents are set as the second parameter / configuration (here, Comb index). Note that the contents of the first parameter / configuration and the second parameter / configuration are not limited to this.

[0069] Also, while FIG. 6 shows a case where the transmission signal resources of UE#1 and UE#2 overlap, this is not limited thereto, and the transmission signal resources of UE#1 and UE#2 may not overlap (or may overlap partially).

[0070] In this way, by commonly setting some parameters and separately setting other parameters for multiple UEs performing UE cooperative MIMO, it becomes possible to appropriately control UE cooperative MIMO transmission.

[0071] (Fourth embodiment) When transmission / reception is performed using UE cooperative MIMO, the base station uses a predetermined DCI to transmit information about a schedule to at least one UE among multiple UEs that perform cooperative transmission.

[0072] The information on the schedule may include at least one of a frequency resource, a time resource, a transmission timing, and a reception timing to be used for transmission / reception. The information on the schedule may be interpreted as information on an UL transmission instruction or information on a DL reception instruction.

[0073] The transmission of information related to the schedule may be controlled based on at least one of the following aspects 4-1 to 4-3. Which of aspects 4-1 to 4-3 is applied may be defined in the specifications, or may be switched and set using higher layer signaling / DCI, etc. Based on the capability information of the UE (or capability information reported from the UE), the aspect that can be set may be limited.

[0074] <Aspect 4-1> The DCI used for the UL transmission instruction / schedule may be a UE-specific DCI. That is, the UE may be scheduled with an individual DCI for each UE (see FIG. 7A). The UE transmits data in cooperation with other UEs using schedule information addressed to the UE (e.g., UL coordinated MIMO transmission).

[0075] In Fig. 7A, the base station transmits schedule information to UE#1 and UE#2. Here, the base station may transmit information related to the schedule to UE#1 using DCI corresponding to UE#1 (e.g., UE#1-specific DCI). The base station may also transmit information related to the schedule to UE#2 using DCI corresponding to UE#2 (e.g., UE#2-specific DCI).

[0076] UE#1 notifies (shares) information on transmission data, etc., to UE#2. For example, UE#1 may transfer / share information on transmission data to be transmitted using UE#2 (or an antenna port of UE#2) to UE#2.

[0077] UE#1 / UE#2 transmit in a coordinated manner based on information about the schedule received from the base station. Here, a case is shown in which UL data corresponding to UE#1 is transmitted from UE#1 (or the antenna port of UE#1) and UE#2 (or the antenna port of UE#2). Note that the information to be transmitted in a coordinated manner is not limited to UL data (or UL-SCH) and may be UL control information (e.g., UCI).

[0078] In this way, by notifying each UE of schedule-related information using UE-specific DCI, it is possible to flexibly control the schedule for each UE.

[0079] Variations 7A shows a case where information such as transmission data is notified (information sharing) from UE#1 to UE#2, but this is not limited to the case. Information such as transmission data may also be notified (information sharing) from UE#2 to UE#1 (see FIG. 7B).

[0080] 7B shows a case where the base station notifies UE#1 of first schedule information and notifies UE#2 of second schedule information. The schedule information #1 and #2 may include at least one of (e.g., both of) information on resources used for transmitting information notified from UE#1 to UE#2 (e.g., information share 1) and information on resources used for transmitting information notified from UE#2 to UE#1 (e.g., information share 2).

[0081] <Aspect 4-2> The DCI used for the UL transmission instruction / schedule may be transmitted only to some of the UEs among multiple UEs. In other words, information about the schedule may be notified to only some of the UEs by UE-specific DCI (see FIG. 8A). The information about the schedule may include information about the schedule for other terminals in addition to information about the schedule for the UE to which the DCI is transmitted.

[0082] In Fig. 8A, the base station transmits schedule information to UE#1. Here, the base station may transmit information about the schedule to UE#1 using DCI CRC-scrambled with the RNTI (e.g., C-RNTI) corresponding to the UE#1. The DCI may include information about the scheduling for UE#1 and information about the scheduling for UE#2.

[0083] UE#1 may notify UE#2 of information related to the schedule of UE#2 as part of information sharing between UEs. UE#2 may transmit UL data (e.g., UL data notified from UE#1) using UE-cooperative MIMO based on the acquired scheduling information. Note that the information to be transmitted in a coordinated manner is not limited to UL data (or UL-SCH) and may be UL control information (e.g., UCI).

[0084] In this way, by notifying information about the schedule using DCI only to some of the UEs, it is possible to suppress an increase in the number of DCIs to be transmitted.

[0085] Variations 8A shows a case where information such as transmission data is notified (information sharing) from UE#1 to UE#2, but this is not limited to the case. Information such as transmission data may also be notified (information sharing) from UE#2 to UE#1 (see FIG. 8B).

[0086] In FIG. 8B, the schedule information notified to UE#1 from the base station may include at least one (e.g., both) of information regarding resources to be used for transmitting information notified from UE#1 to UE#2 (e.g., information share 1) and information regarding resources to be used for transmitting information notified from UE#2 to UE#1 (e.g., information share 2).

[0087] <Aspect 4-3> The DCI used for the UL transmission instruction / schedule may be a DCI common to multiple UEs (e.g., a group common DCI). In other words, information related to the schedule may be notified to multiple UEs (e.g., UE#1 and UE#2) by the group common DCI (see FIG. 9A).

[0088] In Fig. 9A, the base station transmits schedule information to UE#1 and UE#2. Here, the base station may transmit information about the schedule to multiple UEs (for example, a pair of UE#1 and UE#2) using DCI CRC-scrambled with a common RNTI. The DCI may include information about the scheduling for UE#1 and information about the scheduling for UE#2.

[0089] Each UE may obtain information on scheduling addressed to the own terminal from the group common DCI. A common RNTI for multiple UEs may be notified / configured to the UE from the base station by higher layer signaling or the like.

[0090] UE#1 notifies (shares) information on transmission data, etc., to UE#2. For example, UE#1 may transfer / share information on transmission data to be transmitted using UE#2 (or an antenna port of UE#2) to UE#2.

[0091] UE#1 / UE#2 transmit in a coordinated manner based on information about the schedule received from the base station. Here, a case is shown in which UL data corresponding to UE#1 is transmitted from UE#1 (or the antenna port of UE#1) and UE#2 (or the antenna port of UE#2). Note that the information to be transmitted in a coordinated manner is not limited to UL data (or UL-SCH) and may be UL control information (e.g., UCI).

[0092] In this way, by notifying a plurality of UEs of information related to the schedule using a common DCI, it becomes unnecessary to transmit DCI separately to each UE.

[0093] Variations 9A shows a case where information such as transmission data is notified (information sharing) from UE#1 to UE#2, but this is not limited to the case. Information such as transmission data may also be notified (information sharing) from UE#2 to UE#1 (see FIG. 9B).

[0094] In Figure 9B, the schedule information notified to UE #1 and UE #2 by the base station may include at least one (e.g., both) of information regarding resources to be used for transmitting information notified from UE #1 to UE #2 (e.g., information share 1) and information regarding resources to be used for transmitting information notified from UE #2 to UE #1 (e.g., information share 2).

[0095] In aspect 4-1, each UE may assume that scheduling (for example, resource control, etc.) of UL data (or UL-SCH) or PUSCH transmitted by the UE is performed by DCI addressed to the UE.

[0096] In example 4-2 / example 4-3, UE#1 may receive control information addressed to UE#2. In this case, control information addressed to each UE can be transmitted using one DCI.

[0097] When a control signal addressed to each UE (here, UE#1 and UE#2) is transmitted by one DCI, an individual DCI field may be set for each UE in the DCI (option 4-1). Alternatively, a DCI field common to the UEs may be set in the DCI, and a different value may be notified to each UE (option 4-2).

[0098] Option 4-1 In one DCI, an individual DCI field may be defined for each UE (see FIG. 10A). FIG. 10A shows a case where a TPMI field is set for each UE in DCI. For example, in an existing DCI field, the TPMI field may be extended to set a field that can indicate a different TPMI for each UE.

[0099] The DCI field for each UE may be only a predetermined DCI field (or a predetermined type). For a field for which an individual DCI field for each UE is not set, a common value may be assumed between UEs (or may be commonly applied between UEs).

[0100] The DCI field that is set individually for each UE may be a field related to at least one of a precoder for UL MIMO, a rank indication, a UL beam indication (eg, TPMI / SRI), and a TPC command (eg, a TPC command for PUSCH).

[0101] Alternatively, when the Comb index (or the CDM group index) of the DMRS is indicated in the DCI, a field related to the DMRS Comb index (or the CDM group index) may be configured individually for each UE.

[0102] Alternatively, when supporting indication of different resources between UEs, the fields related to time resources / frequency resources may be set individually for each UE.

[0103] The DCI field that is set to the same / common for each UE may be a DCI format indicator field, a timing indicator field, or the like.

[0104] Option 4-2 A different value may be notified to each UE in a DCI field common to the UEs (see FIG. 10B). For example, information on the code point of each DCI (or each bit value of the DCI field) may be set for each UE by higher layer signaling or the like.

[0105] 10B shows a case where the TPMI field corresponding to UE#1 and UE#2 is set in common in the DCI, and the correspondence between the code point of the TMPI field and the TMPI index is set separately for each UE. This makes it possible to specify a different TPMI index for each UE using the common TPMI field.

[0106] <DCIフォーマット> A predetermined DCI format may be defined for UL transmission (e.g., PUSCH transmission) transmitted in a coordinated manner between UEs. Alternatively, a predetermined DCI format may be defined for resource allocation / scheduling used for signal transmission (e.g., information sharing) between UEs. The predetermined DCI format may be configured by, for example, replacing bits in an existing DCI format.

[0107] For example, a specific DCI format may include at least one of a field to be used for coordinated UL transmission (e.g., PUSCH transmission) and a field indicating resources to be used for UE-to-UE signaling transmission (e.g., information sharing between UEs).

[0108] The base station may use a predetermined DCI format to indicate at least one (e.g., both) of a schedule for PUSCH transmission (e.g., UL coordinated PUSCH transmission) and conditions / schedule for UE-to-UE signal transmission in UE-to-UE communication (e.g., resource allocation, etc.) (see FIG. 11 ).

[0109] The field used for PUSCH transmission (e.g., UE coordinated PUSCH transmission) may be a field related to at least one of a precoder for UL MIMO, a rank indication, a UL beam indication (e.g., TPMI / SRI), and a TPC command (e.g., a TPC command for PUSCH).

[0110] Alternatively, if the Comb index (or the CDM group index) of the DMRS is indicated in the DCI, a field related to the DMRS Comb index (or the CDM group index) may be set.

[0111] Alternatively, if indication of different resources between UEs is supported, a field related to time resources / frequency resources may be set.

[0112] The field indicating the resource used for UE-to-UE signal transmission may be a field related to time resources / frequency resources or a field related to TPC commands. The field related to time resources / frequency resources may be set when indicating different resources between UEs is supported. The field related to TPC commands may be set when closed loop TPC (e.g., CL-TPC) is performed for UE-to-UE signal transmission.

[0113] A predetermined DCI (or a predetermined PDCCH) indicating at least one of inter-UE coordinated PUSCH transmission and resource allocation / schedule for inter-UE signal transmission may be configured to be received / detected in a predetermined control resource set / search space. The predetermined control resource set / search space may be interpreted as at least one of a predetermined time resource, a predetermined frequency resource, and a predetermined subcarrier spacing.

[0114] The UE may attempt to detect (e.g., blindly detect) DCI indicating UE coordinated PUSCH transmission in a given control resource set / search space, and may be controlled not to detect DCI (or PDCCH) corresponding to UE coordinated PUSCH transmission in other control resource sets / search spaces.

[0115] Alternatively, a given DCI (or a given PDCCH) may be configured to be received / detected in any control resource set / search space.

[0116] The UE may attempt to detect (e.g., blindly detect) DCI indicating UE collaborative PUSCH transmission in a configured control resource set / search space. The UE may determine whether a UE collaborative PUSCH is scheduled based on whether a predetermined DCI (or a predetermined PDCCH) is CRC scrambled with an RNTI for UE collaborative PUSCH transmission. Alternatively, the UE may determine whether a UE collaborative PUSCH is scheduled based on a predetermined field of the DCI.

[0117] <Use multiple DCI> In the fourth embodiment, a case has been described in which one DCI (or PDCCH) is used to perform the following operations 1 and 2. Action 1: Scheduling UE coordinated PUSCH and allocating inter-UE signaling transmission resources Operation 2: Scheduling PUSCH (e.g., PUSCH resources) of UE#1 and scheduling PUSCH of UE#2

[0118] The fourth embodiment is not limited to this, and DCI / PDCCH may be transmitted multiple times (for example, twice). A part of information (for example, information related to a schedule) may be transmitted in the first DCI, and the remaining information may be transmitted in the second DCI. This reduces the number of DCI bits per time, and can reduce the coding rate and improve the error rate.

[0119] For example, UE shared information may be transmitted using a first DCI, and UE-specific information may be transmitted using a second DCI (see FIG. 12).

[0120] The first DCI may be CRC scrambled with an RNTI corresponding to a predetermined group common. The first DCI may include information on at least one of a resource, a monitoring occasion, a search space, and a control resource set of the second DCI / PDCCH. In this case, the number of detections of the second DCI can be reduced.

[0121] The first DCI may include a DCI field common to UEs. For example, the first DCI may include a field that specifies a parameter that is set commonly between UEs. The field may be, for example, at least one of a PUSCH timing indication (e.g., a timing indicator) field, a PUSCH time / frequency resource indication field, and an inter-UE signal transmission resource indication field.

[0122] The second DCI may be CRC scrambled with a UE-specific RNTI. The second DCI may include a UE-specific DCI field. For example, the second DCI may include a field that specifies a parameter that is set individually for the UE. The field may be, for example, at least one of a UL MIMO precoder / rank indication field, a UL beam indication (TPMI / SRI) field, a DMRS comb index (or a CDM group index) field, and a TPC command field.

[0123] In Fig. 12, the first DCI is group-common and the second DCI is UE-specific, but this is not limiting. Both the first DCI and the second DCI may be UE-specific. In addition, the first DCI and the second DCI may be transmitted in the same slot / same CC / same BWP, or in different slots / different CCs / different BWPs.

[0124] The first DCI / second DCI may include a DAI field (e.g., counter DAI / total DAI). The counter DAI indicates a count value of DCI (or PDCCH), and the total DAI indicates the total number of DCI (or PDCCH). This allows the UE to determine a detection error of the first DCI / second DCI based on the counter DAI / total DAI included in each DCI, even if the UE cannot receive one of the DCIs.

[0125] When reception of a first DCI and a second DCI (or a two-step DCI) is configured / specified, if a UE receives only the first DCI (e.g., a group common DCI) or the second DCI (e.g., a UE individual DCI), the UE may detect a reception error of either DCI.

[0126] If the first DCI and the second DCI include a HARQ process ID field, the UE may assume that the first DCI and the second DCI that include the same HARQ process ID correspond to each other. If the UE is unable to receive either the first DCI or the second DCI for the same HARQ process ID (e.g., within a predetermined time period), the UE may detect an error in either DCI.

[0127] The order of transmission / reception of the first DCI and the second DCI may be specified. For example, the second DCI may be transmitted / received after the first DCI. This can simplify the operation of detecting DCI errors in the UE.

[0128] If an error occurs in any of the DCIs, the UE may control not to perform UE-to-UE communication / UE coordinated PUSCH transmission. If the base station does not receive a PUSCH transmission (UE coordinated PUSCH transmission) transmitted from the UE, the base station may determine that the UE has failed to detect the first DCI / second DCI, and may retransmit the DCI.

[0129] Alternatively, when an error occurs in a predetermined DCI, the UE may control not to perform UE-to-UE communication / UE coordinated PUSCH transmission. For example, when a first DCI is detected incorrectly and a second DCI is received, the UE may control not to perform UE-to-UE communication but not to perform UE coordinated PUSCH transmission. Also, when a first DCI is received and a second DCI is detected incorrectly, the UE may control not to perform both UE-to-UE communication and UE coordinated PUSCH transmission. This makes it possible to appropriately use the DCI that was correctly received.

[0130] Fifth embodiment When performing UL transmission using UE collaborative MIMO, the UE may control data / control information including physical layer transmission data to be reported / notified / transferred / information shared (hereinafter also referred to as transfer / information sharing) to other UEs based on a specified unit / predetermined unit.

[0131] The UE may divide the UL data transmitted by itself into a predetermined unit (see FIG. 13A) and transfer / share the information with other UEs (see FIG. 13B). The predetermined unit may be at least one of a transport block (TB), a code word (CW), a code block (CB), and a bit unit. Although FIG. 13A and FIG. 13B show a case where the data is divided into CB units, this is not limiting.

[0132] The UE may divide the UL data to be transmitted by itself into data to be transmitted on its own UL-SCH and data to be transferred / shared with other UEs by dividing a part of the TB / CW / CB of the UL data to be transmitted by itself. By dividing into TB / CW / CB units, error detection / retransmission can be performed appropriately.

[0133] For example, when UL data is divided by CB, even if an error occurs in the UL data (CB) transmitted from one UE, it is possible to retransmit only the erroneous CB. On the other hand, when UL data is divided by bit, if some CBs are erroneous, control may be performed so that all CBs are retransmitted.

[0134] The distinction (e.g., the boundary for dividing the UL data) between UL data transmitted by the own terminal (e.g., UE #1) and UL data transmitted by another UE (e.g., UE #2) may be set by a higher layer, or may be determined based on a predetermined rule.

[0135] The setting by the higher layer may be based on the number of TB / CW / CB, the number of bits of the UL-SCH of each UE, or the coding rate of the UL-SCH of each UE.

[0136] The predetermined rule may be to equalize the number of bits of the UL-SCH of a plurality of UEs (for example, UE#1 and UE#2). Based on the predetermined rule, the UE may divide the data corresponding to its own terminal (for example, the data transmitted from the antenna port of its own terminal to the base station) and the data corresponding to other terminals (for example, the data transmitted from the antenna port of other terminals to the base station). Among the divided data (for example, TB / CW / CB / bits), the UE may use the first half for its own terminal and the second half for other terminals.

[0137] <Inter-UE Information Sharing> When a UE (for example, UE#1) transfers / share information to another UE (for example, UE#2), it may utilize the mechanisms of communication systems other than 3GPP. For example, UE#1 may use a radio RAN (for example, WiFi), short-range data communication (for example, Bluetooth) to control the transmission of predetermined information to UE#2 (see Figure 14). A UE notifying predetermined information by using the mechanisms of other communication systems may be equivalent to transmitting physical layer information that the UE transfers to the upper layer for the purpose of inter-UE communication. UE#2 may be controlled to transmit the physical layer information received from the upper layer on the UL-SCH.

[0138] In Figure 14, UE#1 transmits CB#2 to UE#2 using the upper layer among the UL data (for example, CB#1 + CB#2). And it shows the case where UE#1 transmits CB#1 as UL data (for example, on the UL-SCH of UE#1), and UE#2 transmits CB#2 as UL data (for example, on the UL-SCH of UE#2).

[0139] Alternatively, when a UE (for example, UE#1) transfers / share information to another UE (for example, UE#2), it may utilize the inter-UE transmission / reception method of the physical layer. For example, UE#1 may use at least one of the D2D channel and the sidelink to control the transmission of predetermined information to UE#2 (see Figure 15).

[0140] In Fig. 15, UE#1 transmits CB#2 of UL data (e.g., CB#1+CB#2) to UE#2 using D2D / sidelink. Also, a case is shown in which UE#1 transmits CB#1 as UL data (e.g., on UL-SCH of UE#1) and UE#2 transmits CB#2 as UL data (e.g., on UL-SCH of UE#2).

[0141] When a physical layer UE-to-UE transmission / reception method is used, the base station may control the schedule. When D2D / sidelink is applied to UE-to-UE information sharing, at least one of a configuration in which resources are autonomously selected between multiple UEs to control transmission (aspect 5-1) and a configuration in which a base station selects / schedules transmission resources between multiple UEs to control transmission (aspect 5-2) may be applied.

[0142] <Aspect 5-1> When resources are selected autonomously between UEs to control transmission, the base station may set a resource pool for each UE using higher layer signaling. A UE may autonomously select resources based on the resource pool to transmit to other UEs (see FIG. 16A and FIG. 16B).

[0143] In Figures 16A and 16B, UE#1 transmits some UL data (e.g., CB#2) of UL data (e.g., CB#1+CB#2) to UE#2 using resources included in a resource pool preset in a higher layer. In addition, a case is shown in which UE#1 transmits CB#1 as UL data (e.g., on UL-SCH of UE#1) and UE#2 transmits CB#2 as UL data (e.g., on UL-SCH of UE#2). The base station may simultaneously schedule UL data for each UE and schedule coordinated transmission between UEs.

[0144] FIG. 16B shows a case where UE-specific DCI is transmitted to each UE (example 4-1), but the methods shown in example 4-2 / example 4-3 may also be applied.

[0145] When a UE for which a resource pool has been set by a higher layer transmits a signal in UE-to-UE communication, the UE may select a resource from the resource pool and transmit a signal to another terminal using the selected resource. In this case, the UE may autonomously perform carrier sensing or the like to determine the state of the resource pool (e.g., whether it is available or not), or may determine the state of the resource pool based on information notified / informed / instructed by the base station.

[0146] The resource pool may be selected randomly by the UE based on random numbers or the like, or may be selected based on a predetermined rule. The receiving UE (e.g., UE#2) may receive / measure resources (or resource pools) set by a higher layer and receive a signal addressed to the UE. To determine whether a signal is addressed to the UE, for example, the UE may determine whether a CRC inserted in data can be solved based on the ID (or C-RNTI) of the UE (e.g., CRC check).

[0147] Alternatively, the UE may not use a resource pool for sharing information between UEs. In this case, like WiFi CSMA / CA (Carrier Sense Multiple Access / Collision Avoidance) and NRU (NR Unlicensed) LBT (Listen Before Talk), the receiver may control to transmit if resources are available, and decode the received signal and determine whether the signal is addressed to the receiver based on information such as the MAC header.

[0148] <Aspect 5-2> When the base station selects resources for UE-UE transmission, the base station may instruct / schedule each UE on the resources to be used for UE-UE transmission. The UE may control the UE-UE transmission using the resources scheduled by the base station (see FIG. 17A and FIG. 17B).

[0149] A data transfer source UE (here, UE#1) that has been allocated resources by the base station uses the allocated resources to divide physical layer data (TB / CW / CB) and transmits a portion of the data (here, CB#2) to another UE#2. A data transfer destination UE (here, UE#2) that has been allocated resources by the base station may measure / receive the allocated resources, receive the divided physical layer data (TB / CW / CB), and transmit the data to the base station using the UL-SCH of UE2.

[0150] In Figures 17A and 17B, UE#1 transmits some UL data (e.g., CB#2) of UL data (e.g., CB#1+CB#2) to UE#2 using resources scheduled by the base station. In addition, a case is shown in which UE#1 transmits CB#1 as UL data (e.g., on UL-SCH of UE#1) and UE#2 transmits CB#2 as UL data (e.g., on UL-SCH of UE#2). The base station may simultaneously schedule UL data for each UE and schedule coordinated transmission between UEs.

[0151] FIG. 17B shows a case where UE-specific DCI is transmitted to each UE (example 4-1), but the methods shown in example 4-2 / example 4-3 may also be applied.

[0152] Sixth embodiment When using UE cooperative MIMO for communication, the base station may grasp channel information between each UE and the base station based on an UL signal transmitted from the UE. The UL signal may be a predetermined reference signal (e.g., SRS) or other signals.

[0153] The base station may instruct / configure / trigger each UE to transmit an UL signal / RS (hereinafter also referred to as SRS) before scheduling each UE (e.g., scheduling UE cooperative MIMO transmission / scheduling inter-UE signal transmission). The base station may determine the TPMI / SRI of each UE based on the received SRS.

[0154] In transmitting SRS, the SRS (here, SRS#1, SRS#2) transmitted from each UE (e.g., UE#1 and UE#2) may use different SRS resources (see FIG. 18A). The base station may set different SRS resources for UE#1 and UE#2 by using higher layer signaling or the like.

[0155] In this case, the SRS transmission timing (e.g., timing advance) may differ between UEs. If the transmission timing of the SRS transmitted from each UE is different, the base station may adjust the timing advance based on the SRS reception result. The UE may be controlled about the timing advance by the base station when transmitting the SRS.

[0156] When the timing advance is adjusted based on the SRS, the UE may receive a timing advance command (TA command in MAC CE) included in the MAC CE transmitted on the PDSCH after transmitting the SRS. When the UE receives the timing advance command, the UE may adjust the timing advance (or the UL transmission timing) based on the received information.

[0157] Alternatively, in transmitting SRS, the SRS (here, SRS#1, SRS#2) transmitted from each UE (e.g., UE#1 and UE#2) may use the same / common SRS resource (see FIG. 18B). The base station may set a common SRS resource for UE#1 and UE#2 using higher layer signaling or the like. Each UE transmits SRS in cooperation using one SRS resource.

[0158] In this case, it is necessary to align the SRS transmission timing (timing advance) between UEs. For this reason, the timing advance may be controlled so as to be adjusted based on UL transmission (e.g., PRACH / SRS / PUSCH / PUCCH, etc.) before SRS transmission.

[0159] The correspondence relationship of each antenna port may be the same during SRS transmission and PUSCH transmission (e.g., during UE coordinated PUSCH transmission) (see FIG. 19). For example, a configuration may be used in which antenna ports are not switched across UEs during SRS transmission and PUSCH transmission. Alternatively, a configuration may be used in which UL beams (e.g., SRI / spatial relationship) do not change during SRS transmission and PUSCH transmission.

[0160] The UE may assume that the beam (e.g., spatial relationship / TCI state / quasi-colocation) of each antenna port in PUSCH transmission is the same as that in the most recent SRS transmission. FIG. 19 shows a case where the antenna port (#0, #1) and spatial relationship (#1) corresponding to UE#1 in SRS transmission are the same as the antenna port (#0, #1) and spatial relationship (#1) corresponding to UE#1 in PUSCH transmission. Similarly, it shows a case where the antenna port (#2, #3) and spatial relationship (#2) corresponding to UE#2 in SRS transmission are the same as the antenna port (#2, #3) and spatial relationship (#2) corresponding to UE#2 in PUSCH transmission.

[0161] FIG. 19 shows an example of PUSCH transmission, but the same mechanism / rule may be applied to the transmission of other UL signals / UL channels (eg, PUCCH) transmitted in cooperation between UEs.

[0162] When one or more UEs (e.g., UEs performing UE cooperative MIMO) transmit UL signals / UL channels, multiple beams (e.g., TCI states, spatial relationships, or quasi-co-location (QCL)) may be configured for one UL signal / UL channel (or resources of one UL signal / UL channel). The UL signal / UL channel may be interpreted as at least one of SRS, PUSCH, and PUCCH.

[0163] In this case, between the SRS / PUSCH / PUCCH channels (or between the signals and the channels), the same antenna port may be mapped to the same physical antenna port (see FIG. 20). Also, between the SRS / PUSCH / PUCCH channels (or between the signals and the channels), the same antenna port may be configured to correspond to the same beam (for example, TCI state, spatial relationship, or quasi-colocation).

[0164] In Fig. 20, the number of the antenna port at the time of SRS transmission is set to be the same as the number of the antenna port at the time of PUSCH transmission. Furthermore, the same beam (e.g., TCI state, spatial relationship, or quasi-co-location) may be set between antenna ports having the same number at the time of SRS transmission and at the time of PUSCH transmission. Furthermore, multiple TCI states (e.g., TCI state #1 and TCI state #2) may be set for a common SRS resource (e.g., SRS resource #1).

[0165] The configuration may be such that the phase is continuous (coherent) between antenna ports #0 and #1, the phase is continuous (coherent) between antenna ports #2 and #3, and the phase is not continuous (coherent) between antenna ports #0-#1 and antenna ports #2-#3.

[0166] Also, it may be possible to set a different (e.g., different) TCI state / spatial relationship / QCL for each antenna port (see FIG. 21). FIG. 21 shows a case where TCI state #1 and TCI state #2 are set for a common SRS resource (e.g., SRS resource #1). In this case, the TCI state may be mapped to each antenna port based on a predetermined rule. Here, a case is shown where a TCI state ID with a smaller index is mapped / associated with an antenna port number with a smaller number.

[0167] Specifically, TCI state #1 is set for antenna ports #0 and #1 of SRS resource #1, and TCI state #2 is set for antenna ports #2 and #3 of SRS resource #1. Also, a case is shown in which the association between antenna ports and TCI states is the same even in transmission of different UL signals / UL channels (e.g., PUSCH transmission). Specifically, TCI state #1 is set for antenna ports #0 and #1 of PUSCH resource #1, and TCI state #2 is set for antenna ports #2 and #3 of PUSCH resource #1.

[0168] <Variations> In Fig. 21, a case where multiple beams (e.g., spatial relationship / TCI state / quasi-co-location) are set for one UL signal / UL channel is shown, but this is not limited thereto. One beam (e.g., spatial relationship / TCI state / quasi-co-location) may be set for each UL signal / UL channel (see Fig. 22). In other words, it may be possible to set a separate (e.g., different) TCI state / spatial relationship / QCL for each resource.

[0169] Figure 22 shows a case where TCI state #1 is set for SRS resource #1 (or antenna ports #0, #1 corresponding to SRS resource #1), and TCI state #2 is set for SRS resource #2 (or antenna ports #2, #3 corresponding to SRS resource #2).

[0170] Also, the association between antenna ports and TCI states may be the same for transmission of different UL signals / UL channels (e.g., PUSCH transmission). For example, TCI state #1 may be set for PUSCH resource #1 (or antenna ports #0 and #1 corresponding to PUSCH resource #1), and TCI state #2 may be set for PUSCH resource #2 (or antenna ports #2 and #3 corresponding to PUSCH resource #2).

[0171] Seventh embodiment When communication is performed using UE cooperative MIMO, if a transmission of data (for example, in units of TB / CW / CB) transmitted by each UE is missed (for example, if an error is detected in the base station), a predetermined retransmission control may be performed. The base station may instruct the UE to retransmit based on a CRC check or an error detection code.

[0172] For example, the UE may perform retransmission control based on at least one of the aspects 7-1 and 7-2. In the following description, a case where transmission data (or UL data) is divided in units of CB is taken as an example, but is not limited to this.

[0173] <Aspect 7-1> Regardless of which UL data (or which UE transmitted the UL data) is erroneous, the UE that transmitted the data (e.g., UE#1) may perform control to retransmit the UL data (see FIG. 23). FIG. 23 shows a case where, of the UL data (e.g., CB#1+CB#2) of UE#1, CB#1 is transmitted from UE#1 (or the antenna port of UE#1) and CB#2 is transmitted from UE#2 (or the antenna port of UE#2).

[0174] If at least one of CB#1 and CB#2 is erroneous, UE#1 may control so that UE#1 retransmits the CB. In this case, UE#1 may control so that only the erroneous CB is retransmitted, or may control so that the CB that is not erroneous is also retransmitted.

[0175] The resource used for retransmission may be a resource (e.g., a retransmission resource) different from the resource scheduled for UL data transmission. The retransmission resource may be defined in a specification, or may be set from the base station to the UE by higher layer signaling or the like. When the UE receives information on a retransmission instruction (or information on an error) from the base station, the UE may transmit a PUSCH for retransmission using a predetermined resource.

[0176] When an error is detected in at least one of CB#1 transmitted from UE#1 and CB#2 transmitted from UE#2, the base station may notify UE#1 (or UE#1 and UE#2) of information regarding a retransmission command. In this case, it is sufficient to control UE#1 to perform retransmission.

[0177] In this way, by controlling the source UE or data transfer source UE (UE #1) to perform retransmission, even if an error is detected in a CB that is not being transferred to other UEs, a new UE-to-UE transfer for retransmission can be eliminated.

[0178] <Aspect 7-2> The UE to perform retransmission may be determined / selected based on which UL data (or which UE transmitted the UL data) is erroneous.

[0179] Option A A UE (or a UE that has missed a transmission) that has been notified by the base station of an instruction to retransmit the CB transmitted at the time of the initial transmission (or that the CB is incorrect) may be controlled to retransmit the CB.

[0180] The base station may schedule a PUSCH resource for transmitting retransmission data to the UE. The UE may transmit UL data instructed by the base station to be retransmitted using the scheduled resource. The UE may control so as to retransmit only erroneous CBs, or may control so as to retransmit not only erroneous CBs but also non-erroneous CBs.

[0181] The resource used for retransmission may be a resource (e.g., a retransmission resource) different from the resource scheduled for UL data transmission. The retransmission resource may be defined in a specification, or may be set from the base station to the UE by higher layer signaling or the like. When the UE receives information on a retransmission instruction (or information on an error) from the base station, the UE may transmit a PUSCH for retransmission using a predetermined resource.

[0182] The base station may notify the UE that transmitted the UL data of a retransmission instruction for the UL data. For example, if an error is detected in CB#1 transmitted from UE#1, the base station may notify UE#1 of information related to the retransmission instruction. Also, if an error is detected in CB#2 transmitted from UE#2, the base station may notify UE#2 of information related to the retransmission instruction. In this way, by having the UE that transmitted the UL data in error retransmit the data, new inter-UE transfer for the retransmission is unnecessary.

[0183] If an error is detected in one of the CBs (e.g., CB#2 transmitted from UE#2), the base station may notify both UEs (e.g., UE#1 and UE#2) of information related to a retransmission command. In this case, retransmission may be performed only from UE#2, or retransmission may be performed from both UE#1 and UE#2.

[0184] Option B A UE (or a UE that missed a transmission) that is notified by the base station of an instruction to retransmit the CB sent during the initial transmission (or that the CB is incorrect) may be controlled so as not to retransmit the CB (so that another UE will send the incorrect CB).

[0185] For example, when an error is detected in CB#1 transmitted from UE#1, control may be performed so that CB#1 is retransmitted from UE#2 (see FIG. 24). In this case, UE#1 may transfer / share CB#1 to UE#2, and UE#2 may transmit CB#1 to the base station. The base station may notify UE#1 of information related to a retransmission command, or may notify both UE#1 and UE#2 of information related to a retransmission command. The transfer control from UE#1 to UE#2 may be applied to the above-mentioned embodiments (for example, the fifth embodiment).

[0186] If an error is detected in CB#2 transmitted from UE#2, control may be performed so that UE#1 retransmits CB#2. In this case, since UE#1 knows the information on CB#2, UE-to-UE transfer is not required. The base station may notify UE#1 of information on the retransmission command, or may notify both UE#1 and UE#2 of information on the retransmission command.

[0187] In this way, by performing retransmission from a UE other than the UE that made the mistaken transmission, retransmission can be performed from a UE in a better communication environment.

[0188] If an error is detected in the CB from both UEs, control may be performed so that a specific UE (eg, UE#1) retransmits the CB, or control may be performed so that each UE retransmits the CB.

[0189] (supplement) The above embodiment may be applied only to UEs that report support by UE capability signaling (e.g., UE capability signaling). In the above embodiment, a configuration in which part of the data of UE#1 is also transmitted from UE#2 has been shown, but based on this configuration, the availability of data transfer from UE#2 to U##1 (or the availability of bidirectional data transfer) may be reported by another UE capability signaling.

[0190] The above embodiment may be applied to a case where the UE#1 and UE#2 are set by a base station using a higher layer control signal, etc. In the above embodiment, the UE#1 and UE#2 may be interpreted as a first UE and a second UE, a master UE and a slave UE, or a primary UE and a secondary UE.

[0191] (Wireless communication system) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0192] 25 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0193] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0194] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0195] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0196] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0197] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0198] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0199] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0200] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0201] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0202] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0203] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0204] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0205] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0206] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0207] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0208] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0209] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0210] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0211] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0212] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0213] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0214] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0215] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0216] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0217] (base station) 26 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0218] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0219] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0220] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0221] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0222] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0223] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0224] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0225] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0226] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0227] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0228] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0229] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0230] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0231] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0232] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0233] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0234] The transmission / reception unit 120 may transmit information related to the schedule to at least one of the multiple terminals. The control unit 110 may control reception of UL data transmitted in a coordinated manner from the multiple terminals based on the information related to the schedule.

[0235] The transceiver 120 may transmit information regarding the schedule to at least one of the multiple terminals by using terminal-specific downlink control information or group common downlink control information. The control unit 110 may control reception of UL data transmitted in a coordinated manner from the multiple terminals based on the information regarding the schedule.

[0236] The transceiver 120 may receive UL data transmitted in a coordinated manner from at least one of a plurality of terminals based on information regarding a schedule for transmission to at least one of the terminals. The control unit 110 may set resources or a resource pool to be used for transmitting information regarding a portion of UL data divided based on at least one of a transport block unit, a code word unit, a code block unit, and a bit unit among the UL data.

[0237] The transceiver 120 may receive sounding reference signals from multiple terminals. The controller 110 may control to receive UL transmissions transmitted in a coordinated manner from multiple terminals based on information related to a schedule. An antenna port used for transmitting the sounding reference signal may be associated with an antenna port used for UL transmission.

[0238] (User terminal) 27 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230.

[0239] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0240] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0241] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0242] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0243] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0244] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0245] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0246] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0247] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0248] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0249] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0250] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0251] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0252] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0253] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0254] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0255] The transceiver 220 may receive information about a schedule. The transceiver 220 may transmit information about at least a part of the UL data to another terminal. The transceiver 220 may receive a synchronization signal used for synchronization with another terminal. The control unit 110 may control the transmission of the UL data in cooperation with another terminal based on information about the schedule. The UL data may be transmitted using a rank or a number of layers that is greater than the number of antenna ports supported by at least one of the terminal and the other terminal. In the cooperative transmission of UL data, at least a part of parameters may be set in common for a first demodulation reference signal corresponding to the first UL data transmitted by the terminal and a second demodulation reference signal corresponding to the second UL data transmitted by the other terminal.

[0256] The transceiver 220 may receive information about the schedule by terminal-specific downlink control information or group common downlink control information. The control unit 110 may control the transmission of UL data in cooperation with other terminals based on the information about the schedule. The terminal-specific downlink control information may include information about the schedule for the terminal and other terminals. The terminal-specific downlink control information or group common downlink control information may include at least one of first parameter information used for transmitting information about at least a part of the UL data and second parameter information used for transmitting the UL data. The transceiver 220 may receive the first parameter information used for transmitting information about at least a part of the UL data and the second parameter information used for transmitting the UL data by using different downlink control information.

[0257] The transceiver 220 may transmit information on a portion of UL data divided based on at least one of a transport block unit, a code word unit, a code block unit, and a bit unit to another terminal. The control unit 110 may control the transmission of UL data in cooperation with another terminal based on information on the schedule. The transceiver 220 may transmit information on a portion of UL data to another terminal using a higher layer. The transceiver 220 may transmit information on a portion of UL data to another terminal using a channel used for device-to-device communication (D2D) and a channel for a side link. The transceiver 220 may transmit information on a portion of UL data to another terminal using any of resources included in a resource pool or scheduled resources.

[0258] The transceiver 220 may transmit a sounding reference signal. The transceiver 220 may receive information related to a schedule. The control unit 110 may control the UL transmission in cooperation with other terminals based on the information related to the schedule. An antenna port used for transmitting the sounding reference signal may be associated with an antenna port used for UL transmission. At least one of a different pseudo collocation, a different transmission configuration index, and a different spatial relationship may be set for each antenna port number. At least one of the same pseudo collocation, the same transmission configuration index, and the same spatial relationship may be set for the same antenna port number in the transmission of the sounding reference signal and the UL transmission.

[0259] When retransmitting UL transmission transmitted in cooperation with other terminals, the control unit 110 may perform control so that retransmission is performed from a specific terminal.

[0260] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0261] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0262] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 28 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0263] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0264] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0265] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0266] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0267] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0268] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0269] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0270] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0271] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0272] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0273] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0274] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0275] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0276] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0277] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0278] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0279] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0280] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0281] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0282] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0283] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0284] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0285] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0286] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0287] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0288] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0289] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0290] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0291] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0292] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0293] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0294] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0295] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0296] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0297] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0298] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0299] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0300] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0301] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0302] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0303] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0304] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0305] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0306] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0307] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0308] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0309] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0310] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0311] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0312] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be read as a sidelink channel.

[0313] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0314] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0315] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0316] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0317] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0318] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0319] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0320] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0321] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0322] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0323] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0324] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0325] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0326] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0327] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0328] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0329] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiving unit that receives information related to a schedule by terminal-specific downlink control information or group common downlink control information; A transmitting unit that transmits information regarding at least a part of the UL data to another terminal; a control unit that controls the transmission of the UL data in cooperation with the other terminals based on information regarding the schedule, The receiving unit receives first parameter information used for transmitting information related to at least a portion of the UL data and second parameter information used for transmitting the UL data by using different downlink control information; A terminal, characterized in that, between terminals which transmit the UL data in a cooperative manner, the first parameter information is set to the same content, and the second parameter information is set to different content.

2. The terminal according to claim 1 , wherein the terminal-specific downlink control information includes information regarding schedules for the terminal and the other terminals.

3. The terminal described in claim 1 or claim 2, characterized in that the control unit controls the transmission to the other terminal of information regarding a portion of the UL data divided based on at least one of transport block units, code word units, code block units, and bit units.

4. receiving information regarding a schedule by terminal-specific downlink control information or group common downlink control information; receiving first parameter information used for transmitting information relating to at least a portion of UL data and second parameter information used for transmitting the UL data by using different downlink control information; transmitting information regarding at least a portion of the UL data to another terminal; and controlling the transmission of the UL data in cooperation with the other terminals based on information regarding the schedule, A wireless communication method for a terminal, characterized in that, between terminals that cooperate to transmit the UL data, the first parameter information is set to the same content, and the second parameter information is set to different content.

5. a transmission unit that transmits information related to a schedule to at least one of a plurality of terminals by using terminal-specific downlink control information or group-common downlink control information; a control unit that controls reception of UL data transmitted in a coordinated manner from the plurality of terminals based on information regarding the schedule; The transmitter transmits first parameter information used for transmitting information related to at least a portion of the UL data and second parameter information used for transmitting the UL data by using different downlink control information; A base station characterized in that, between terminals which transmit the UL data in a coordinated manner, the first parameter information is set to the same content, and the second parameter information is set to different content.

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