Terminal and communication method

Abstract

A terminal is provided with: a reception unit that receives, from a base station, information indicating a state pertaining to network energy conservation; a control unit that assumes a quasi co-location relationship, i.e., a QCL relationship, on the basis of the information indicating the state; and a communication unit that communicates with the base station using the assumed QCL relationship.

Description

Technical Field

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

[0002] In NR (New Radio), which is a successor system to LTE (Long Term Evolution), also known as "5G", technologies that meet requirements such as a large-capacity system, high-speed data transfer speed, low latency, simultaneous connection of multiple terminals, low cost, and power saving are being studied (for example, Non-Patent Document 1).

[0003] In addition, in Release 18 of 3GPP (registered trademark), research has been conducted on power saving of base stations (for example, Non-Patent Document 2).

[0004] Prior Art Documents

[0005] Non-Patent Documents

[0006] Non-Patent Document 1: 3GPP TS 38.300 V17.2.0 (2022-09)

[0007] Non-Patent Document 2: "New SI: Study on network energy savings for NR", RP-213554, 3GPP TSG RAN Meeting #94e, 3GPP, December 2021

[0008] Non-Patent Document 3: 3GPP TS 38.331 V17.2.0 (2022-09) Summary of the Invention

[0009] Problems to be Solved by the Invention

[0010] Research is to be conducted on reducing the power consumption of the network. However, the details of the control for reducing the power consumption of the network are not clear.

[0011] The present invention has been made in view of the above problems, and an object thereof is to reduce the power consumption on the network side in a wireless communication system.

[0012] Means for Solving the Problems

[0013] According to the disclosed technology, a terminal is provided, which includes: a receiving unit that receives information indicating a state related to network energy saving from a base station; a control unit that assumes a quasi-co-location relationship, that is, a QCL relationship, based on the information indicating the state; and a communication unit that communicates with the base station using the assumed QCL relationship.

[0014] Effects of the Invention

[0015] According to the disclosed technology, in a wireless communication system, power consumption on the network side can be reduced. Description of the Drawings

[0016] Figure 1 It is a diagram showing a structural example (1) of a wireless communication system.

[0017] Figure 2 It is a diagram showing a structural example (2) of a wireless communication system.

[0018] Figure 3 It is a diagram for explaining an example (1) of the TCI format.

[0019] Figure 4 It is a diagram for explaining an example (2) of the TCI format.

[0020] Figure 5 It is a flowchart for explaining an example (1) of the TCI notification.

[0021] Figure 6 It is a flowchart for explaining an example (2) of the TCI notification.

[0022] Figure 7 It is a diagram for explaining the unified TCI state.

[0023] Figure 8 It is a diagram showing an example (1) of the antenna mapping mode.

[0024] Figure 9 It is a diagram showing an example (2) of the antenna mapping mode.

[0025] Figure 10 It is a diagram showing an example (3) of the antenna mapping mode.

[0026] Figure 11 It is a diagram showing an example of the ES state in the embodiment of the present invention.

[0027] Figure 12 It is a diagram showing an example of the QCL information in the embodiment of the present invention.

[0028] Figure 13 It is a diagram showing an example of multiple QCL sources in the embodiment of the present invention.

[0029] Figure 14 It is a diagram showing an example (1) of the TCI structure in the embodiment of the present invention.

[0030] Figure 15 It is a diagram showing an example (2) of the TCI structure in the embodiment of the present invention.

[0031] Figure 16This is a diagram showing an example of the functional structure of the base station 10 according to an embodiment of the present invention.

[0032] Figure 17 This is a diagram showing an example of the functional structure of the terminal 20 according to an embodiment of the present invention.

[0033] Figure 18 This is a diagram showing an example of the hardware structure of the base station 10 or the terminal 20 according to an embodiment of the present invention.

[0034] Figure 19 This is a diagram showing an example of the structure of the vehicle 2001 in an embodiment of the present invention. Detailed Embodiments

[0035] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the embodiments described below are merely examples, and the embodiments of the present invention are not limited to the following embodiments.

[0036] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are appropriately used. Among them, the existing technology is, for example, existing LTE, but is not limited to existing LTE. In addition, unless otherwise specified, it is assumed that the term "LTE" used in this specification has a broad meaning including LTE-Advanced and subsequent modes (e.g., NR).

[0037] In addition, in the embodiments of the present invention described below, terms such as SS (Synchronization Signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) used in the conventional LTE are used. These are for convenience of description, and signals, functions, etc. that are the same as these can also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even for signals used in NR, they are not necessarily clearly recorded as "NR-".

[0038] In addition, in the embodiments of the present invention, the duplex mode can be a TDD (Time Division Duplex) mode, an FDD (Frequency Division Duplex) mode, or can also be a mode other than these (for example, Flexible Duplex, etc.).

[0039] In addition, in the embodiments of the present invention, "configuring" radio parameters, etc. can be pre-configuring a predetermined value, or can be configuring radio parameters notified from the base station 10 or the terminal 20.

[0040] Figure 1 It is a diagram showing a structural example (1) of the wireless communication system in the embodiments of the present invention. As Figure 1 shown, the wireless communication system in the embodiments of the present invention includes a base station 10 and a terminal 20. In Figure 1 each, one base station 10 and one terminal 20 are shown, but this is only an example, and there can be multiple of each.

[0041] The base station 10 is a communication device that provides more than one cell and communicates wirelessly with the terminal 20. The physical resources of the wireless signal are defined in the time domain and the frequency domain. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, through NR-PBCH and is also called broadcast information. The synchronization signal and system information can also be called SSB (SS / PBCH block: SS / PBCH block). As Figure 1 shown, the base station 10 transmits a control signal or data to the terminal 20 through the DL (Downlink), and receives a control signal or data from the terminal 20 through the UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming for signal transmission and reception. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output)-based communication to the DL or UL. In addition, both the base station 10 and the terminal 20 can also communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). Also, the terminal 20 can communicate via the primary cell of the base station 10 and the primary and secondary cell group cells (PSCell: Primary SCG Cell) of other base stations 10 based on DC (Dual Connectivity).

[0042] The terminal 20 is a communication device with a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, a communication module for M2M (Machine-to-Machine). As Figure 1 shown, the terminal 20 receives a control signal or data from the base station 10 through the DL, and transmits a control signal or data to the base station 10 through the UL, thereby using various communication services provided by the wireless communication system. In addition, the terminal 20 receives various reference signals transmitted from the base station 10, and performs measurement of the propagation path quality based on the reception result of the reference signal.

[0043] The terminal 20 is capable of performing carrier aggregation in which multiple cells (multiple CCs (Component Carriers)) are bundled to communicate with the base station 10. In carrier aggregation, 1 PCell (Primary cell) and 1 or more SCells (Secondary cells) are used. In addition, a PUCCH-SCell having a PUCCH may also be used.

[0044] Figure 2 FIG. 2 is a diagram showing an example (2) of the wireless communication system in the embodiment of the present invention. Figure 2 FIG. 3 shows a structural example of the wireless communication system in the case of performing DC (Dual Connectivity). As Figure 2 shown, it has a base station 10A as an MN (Master Node) and a base station 10B as an SN (Secondary Node). The base station 10A and the base station 10B are each connected to the core network. The terminal 20 is capable of communicating with both the base station 10A and the base station 10B.

[0045] The cell group provided by the base station 10A as the MN is called an MCG (Master Cell Group), and the cell group provided by the base station 10B as the SN is called an SCG (Secondary Cell Group). In addition, in DC, the MCG is composed of 1 PCell and 1 or more SCells, and the SCG is composed of 1 PSCell (Primary SCG Cell) and 1 or more SCells.

[0046] The processing operations in this embodiment can be executed by the Figure 1 system structure shown in FIG. 4, or can be executed by the Figure 2 system structure shown in FIG. 5, or can also be executed by a system structure other than these.

[0047] <Power saving of the base station 10>

[0048] In order to achieve carbon neutrality and SDGs (Sustainable Development Goals), the importance of saving the power consumption of the base station 10 (network) is increasing day by day. However, the technology for saving the power consumption of the base station 10 has not been standardized in 3GPP.

[0049] Techniques for improving the power saving of the network, i.e., network energy saving (hereinafter also referred to as "NW-ES"), in both the transmission and reception aspects of base station 10 are being studied. For transmission and / or reception, it is necessary to adapt to the efficient utilization of the time domain, frequency domain, spatial domain, power domain, etc. with a dynamic and / or semi-static and finer granularity, using feedback and auxiliary information from the UE. In addition, the exchange and coordination of information via the network interface can also be performed.

[0050] Two antenna ports being QCL (Quasi Co-Location) can mean that the properties of the channel carrying symbols in one antenna port can be used to estimate the properties of the channel carrying symbols in the other antenna port. Using large-scale properties, such as delay spread, Doppler spread, SINR (Signal-to-interference-plus-noise ratio) / average gain, the UE can optimize the filtering coefficients for channel estimation. The QCL setting can reduce the number of reference signals or channels that the UE needs to measure.

[0051] Table 1 shows examples of QCL types. As shown in Table 1, 4 QCL types are defined, namely QCL type A, QCL type B, QCL type C, and QCL type D. The QCL types are defined to notify large-scale properties and beam-related information.

[0052] [Table 1]

[0053]

[0054] TCI (Transmission Configuration Indication) notifies that the CSI-RS (Channel state information Reference Signal) or the DMRS of PDSCH / PDCCH can refer to the large-scale properties of one or two reference signals (SSB index or NZP (non zero power)-CSI-RS).

[0055] Figure 3 It is a diagram for explaining Example (1) of the TCI format. As Figure 3As shown, it is possible to set two QCL sources with PDCCH DMRS, PDSCH DMRS, and CSI-RS for TRS (Tracking RS) / BM (Beam management) / CSI as QCL targets. The QCL sources become SSB and CSI-RS for TRS / BM / CSI.

[0056] Figure 4 It is a diagram for explaining Example (2) of the TCI format. As Figure 4 shown, an information element that defines the TCI state (refer to Non-Patent Document 3). The TCI state can include two QCL information. Each QCL information can include a serving cell index, BWP-ID, reference signal, and QCL type.

[0057] Figure 5 It is a flowchart for explaining Example (1) of the TCI notification. Figure 5 The TCI notification of PDCCH is shown. In step S101, the RRC sets K (up to 64) TCI states for each CORESET. In the next step S102, for each CORESET, when K > 1, the MAC-CE activates 1 TCI, and when K = 1, the TCI set by the RRC is used. In the next step S103, the CORESET is switched dynamically for transmission to the PDCCH. In the next step S104, the UE performs blind decoding on all CORESETS of the PDCCH.

[0058] In addition, the UE activates 3 ms after the time slot in which the HARQ-ACK information corresponding to the PDSCH carrying the activation command is transmitted.

[0059] Figure 6 It is a flowchart for explaining Example (2) of the TCI notification. Figure 6 The TCI notification of PDSCH is shown. In step S201, the RRC sets M (up to 128) TCI states. In the next step S202, the MAC-CE activates up to 8 TCI states. In the next step S203, it is determined whether the gap between the DCI and the PDSCH is less than the threshold (Threshold-Sched-Offset). If it is less than the threshold ("Yes" in S203), it proceeds to step S204, and if it is above the threshold ("No" in S203), it proceeds to step S205. In step S204, the TCI state of the CORESET with the minimum ID of the PDCCH is used.

[0060] In step S205, it is determined whether tci-PresentInDCI (refer to Non-Patent Document 3) is not set. In the case where it is not set ("Yes" in S205), the process proceeds to step S206. In the case where it is set ("No" in S206), the process proceeds to step S207. In step S206, the TCI state of the scheduled PDCCH is used. In step S207, one TCI state is notified by DCI.

[0061] The TCI notification of the reference signal is set by RRC. The QCL information of the CSI-RS refers to the SSB or other CSI-RS.

[0062] In Release 17, the beam notification mechanism was completely revolutionized and is called the Release 17 unified TCI framework.

[0063] Figure 7 It is a diagram for explaining the unified TCI state. The TCI state is notified through a TCI state field within 3 bits included in DCI format 1_1 (with DL allocation) or DCI format 1_2 (without DL allocation). As Figure 7 shown, regarding the notification of the TCI state, the unified TCI state and the separated TCI state can be switched by RRC. As Figure 7 shown, one TCI code point can be associated with one unified TCI state, or can be associated with one DL-TCI and / or UL-TCI.

[0064] Here, when applying dynamic network energy saving with adjusted antennas and transmission power to the base station 10, it has an impact on the QCL relationship.

[0065] Figure 8 It is a diagram showing an example (1) of the antenna mapping mode. Figure 8 It is an example of the sub-array mode. One TxRU (Tx radio unit) is mapped to multiple antennas. That is, the antennas of different TxRUs are separated. As Figure 8 shown, when a part of the antennas of each sub-array is turned off, the beam width increases.

[0066] Figure 9 It is a diagram showing an example (2) of the antenna mapping mode. Figure 9 It is an example of the sub-array mode. One TxRU is mapped to multiple antennas. That is, the antennas of different TxRUs are separated. As Figure 9 shown, when the antennas are turned off for each sub-array, the number of ports decreases.

[0067] Figure 10 It is a diagram showing an example (3) of the antenna mapping mode. Figure 10This is an example of the full-connection mode, where all TxRUs are connected to all antennas. As Figure 10 shown, when a part of the antennas is turned off, the beam width increases.

[0068] When the RS beam width changes, the transceiver path changes, so the delay and beamforming gain change. Therefore, QCL type A, QCL type C, and QCL type D are affected.

[0069] When the number of RS ports changes, the ports that have been turned off are measured, thus affecting all large-scale properties. Therefore, QCL type A, QCL type B, and QCL type C are affected.

[0070] Regarding power adaptation, when the RS power changes, the average gain changes and the received power changes. Therefore, QCL type D is affected.

[0071] The affected QCL types are summarized in Table 2.

[0072] [Table 2]

[0073]

[0074] Therefore, in order to apply network energy saving to base station 10, the following actions 1)-4) related to QCL / TCI enhancement can be performed.

[0075] Action 1) can define and notify the ES state (Energy saving state) as follows.

[0076] The ES state can include any one or more of 1)-4) shown below.

[0077] 1) Spatial information on the number of ports, the number of TxRUs, or the number of antennas. The mapping mode between TxRUs and antennas, the antenna off mode. The antenna off mode can also be a mode indicating which one of Figure 8 , Figure 9 , Figure 10 it is.

[0078] 2) Power information related to the transmit power and / or PSD (Power spectral density). This power information can include any information such as the transmit power and / or PSD itself, the offset from the reference level of the transmit power and / or PSD, the maximum transmit power and / or PSD.

[0079] 3) Information related to the adaptation in the time domain, frequency domain, spatial domain, or power domain for energy saving.

[0080] 4) Figure 11 This is a diagram showing an example of the ES state in an embodiment of the present invention. Figure 11 The information element ES-State shown. This information element includes spatial port information or the number of ports, and the PSD offset of the power domain.

[0081] Any one or more of 1)-3) shown below can be notified as the ES state via RRC signaling, MAC-CE, group, or UE-specific DCI.

[0082] 1) The ES state can be explicitly notified through a separate field. For example, the ES state can be notified through a 2-bit field, and the TCI can be notified through a 3-bit field. These two fields can be included in the same or different MAC-CE or DCI notifications or formats.

[0083] 2) The ES state can also be explicitly notified by unifying it with other information on network energy saving. For example, the ES state and the TCI notification can be notified through a jointly encoded 3-bit field. Table 3 is an example where the TCI for DL and UL is unified. Table 4 is an example where the TCI for DL and UL is separated.

[0084] [Table 3]

[0085] ES status field ES status DL and UL unified TCI 000 ES#1 (2-port, 0 dB PSD offset) TCI#2 001 ES#2 (4-port, 3 dB PSD offset) TCI#4 010 ES#3 (4-port, 0 dB PSD offset) TCI#7 011 ES#4 (8-port, 3 dB PSD offset) TCI#10 100 ： ：

[0086] [Table 4]

[0087] ES status field ES status DL TCI UL TCI 000 ES#1 (2-port, 0 dB PSD offset) TCI#2 TCI#3 001 ES#2 (4-port, 3 dB PSD offset) N / A TCI#4 010 ES#3 (4-port, 0 dB PSD offset) TCI#7 N / A 011 ES#4 (8-port, 3 dB PSD offset) TCI#10 TCI#10 100 ： ： ：

[0088] 3) The ES state can also be implicitly notified. For example, the base station 10 can notify spatial, power, and other energy-saving information, and the UE can estimate the ES state based on this energy-saving information.

[0089] When the ES state can be notified through group or UE-specific DCI, it can be set via RRC signaling whether the field representing the ES state is included in the DCI.

[0090] Action 2) can define and notify a new QCL type for network energy-saving adaptation.

[0091] The new QCL type can be a QCL type that notifies that the receiving beam in the UE is the same as the QCL source and the received signal strength is different from that of the QCL source. Table 5 and Figure 12 This is a diagram showing an example of the QCL information in an embodiment of the present invention. As shown in Table 5 and Figure 12 shown, the new QCL type can be called QCL type E, and the receiving beam can be the object.

[0092] [Table 5]

[0093] QCL type Details QCL-Type A Doppler shift, Doppler spread, mean delay, delay spread QCL-Type B Doppler shift, Doppler spread QCL-Type C Mean delay, Doppler shift QCL-Type D Spatial reception parameters (received beam and received signal strength) QCL-Type E Received beam

[0094] It is also possible to perform the following notification according to the UE capability or the base station capability. For example, when the UE has a network energy saving capability related to adaptation such as space and power, it is also possible that after the UE reports this capability to the base station 10, it can set a new QCL type.

[0095] In addition, for example, when the support for network energy saving or a new QCL type is notified from the base station 10 via RRC signaling or system information, and the UE has a network energy saving capability related to adaptation such as space and power, it is also possible that after the UE reports this capability to the base station 10, it can set a new QCL type.

[0096] In the following specific channels or reference signals shown in 1)-5), the activation flag for network energy saving or the new QCL type can be set or not set.

[0097] 1) The PDCCH carrying the CORESET with a specific CORESET index

[0098] 2) UE-specific, non-UE-specific, or all PDSCH, PUCCH, or PUSCH

[0099] 3) Dynamically or CG (Configured) authorized PUSCH

[0100] 4) A-CSI-RS (aperiodic CSI-RS), P-CSI-RS (periodic CSI-RS), TRS, BM CSI-RS, CSICSI-RS, or all CSI-RS

[0101] 5) UE-specific, non-UE-specific, or all PDSCH for which the activation flag "NewQCLType" is set. 3) The UE can assume whether QCL and / or TCI is valid or invalid based on the notification.

[0102] When the UE explicitly or implicitly notifies the ES state through the above action 1), the UE can assume whether QCL and / or TCI is valid or invalid based on any one or more of the methods shown in the following 1)-3) based on this notification.

[0103] 1) It is possible to assume whether QCL and / or TCI is valid or invalid based on one or more of the ES state and the RS type, number of ports, RS-ID, and RS set ID of the QCL source.

[0104] For example, it is conceivable to determine whether the QCL relationship with SSB, CSI-RS, BM CSI-RS, TRS CSI-RS, CSI CSI-RS, or SRS as the QCL source is valid or invalid.

[0105] For example, it is conceivable to determine whether the QCL relationship with the SSB, CSI-RS, BM CSI-RS, TRS CSI-RS, CSI CSI-RS, or SRS of the N-port as the QCL source is valid or invalid.

[0106] For example, it is conceivable to determine whether the QCL relationship with the SSB, CSI-RS resource, CSI-RS resource set, or SRS with a specific index as the QCL source is valid or invalid.

[0107] 2) It is possible to conceive whether QCL and / or TCI is valid or invalid based on one or more of the channel type, RS type, number of ports, RS-ID, and RS set ID of the ES state and QCL target.

[0108] For example, it is conceivable to determine whether the QCL relationship with SSB, CSI-RS, BM CSI-RS, TRS CSI-RS, CSI CSI-RS, or SRS as the QCL target is valid or invalid.

[0109] For example, it is conceivable to determine whether the QCL relationship with the SSB, CSI-RS, BM CSI-RS, TRS CSI-RS, CSI CSI-RS, or SRS of the N-port as the QCL target is valid or invalid.

[0110] For example, it is conceivable to determine whether the QCL relationship with the SSB, CSI-RS resource, CSI-RS resource set, or SRS with a specific index as the QCL target is valid or invalid.

[0111] 3) It is possible to conceive whether QCL and / or TCI is valid or invalid based on the ES state, one or more QCL types (QCL type A, B, C, D, or the new QCL type in the above action 2), and the adaptation method of the space and power of the base station 10.

[0112] For example, in the case of spatial adaptation in the antenna array pattern shown in Figure 8 it may be that QCL types A, C, and D are invalid, and QCL type B is valid.

[0113] For example, in the case of spatial adaptation in the antenna array pattern shown in Figure 9 it may be that QCL types A, B, and C are invalid, and QCL type D is valid.

[0114] For example, in the case of spatial adaptation in the antenna array pattern shown in Figure 10In the case of spatial adaptation of the antenna array pattern shown, it is possible that QCL types A, C, and D are invalid and QCL type B is valid.

[0115] For example, in the case where power adaptation based on QCL type D is invalid, QCL types A, B, and C can be valid.

[0116] For example, in the case where the new QCL type is supported and power adaptation based on the new QCL type is valid, QCL types A, B, C, and D can be invalid.

[0117] For example, in the case where the new QCL type is not supported and power adaptation based on QCL type D is partially invalid, QCL types A, B, and C can be valid.

[0118] For example, for power adaptation for RS, the receiving beam of the UE can be unchanged, and the received signal strength can be changed by changing the transmission power. QCL type D (the receiving beam of the UE) is partially valid.

[0119] In the case where one or more QCLs in a certain TCI state are invalid, the UE can perform any one or more of 1)-5) shown below.

[0120] 1) Figure 13 It is a diagram showing an example of multiple QCL sources in an embodiment of the present invention. As Figure 13 shown, the UE can use the valid QCLs among the QCLs included in the TCI.

[0121] 2) The UE can also not use all the QCLs included in the TCI.

[0122] 3) The UE can perform additional measurements to obtain the large-scale properties of the invalid QCLs included in the TCI.

[0123] 4) The UE can also perform additional measurements to obtain the large-scale properties of all QCLs, regardless of whether the QCLs included in the TCI are valid or invalid.

[0124] 5) The UE can also use all the QCLs included in the TCI.

[0125] For action 4), the UE can switch the QCL and TCI based on a notification. When the UE receives a notification in a time slot, symbol, or at time n, or when the UE transmits a HARQ-ACK feedback of the notification in time slot n, the UE can act as follows. In addition, time slot n can also be replaced with symbol n or time n.

[0126] This notification may include the ES status and / or TCI index described in the above action 1). When QCL and / or TCI are set in this notification, the UE may switch to this QCL and / or TCI in time slot n+k based on this notification. The mapping between this QCL and / or TCI and the ES status may be preset by RRC or MAC-CE as follows in 1)-3).

[0127] 1) Figure 14 is a diagram showing an example (1) of the TCI structure according to an embodiment of the present invention. As Figure 14 shown, one TCI or one QCL target may be mapped to multiple ES states, and one ES state may be mapped to multiple QCLs or QCL sources. When the UE receives this notification, the UE selects QCL based on the notified ES status or TCI index. Additionally, 1) may be applied when the ES status and TCI are notified separately.

[0128] 2) Figure 15 is a diagram showing an example (2) of the TCI structure according to an embodiment of the present invention. As Figure 15 shown, a TCI list including multiple TCIs associated with different ES states may be set. It may be that one TCI is mapped to one ES state, and one ES state is mapped to multiple QCLs or QCL sources. When the UE receives this notification, the UE selects QCL based on the notified ES status or TCI index. Additionally, 2) may be applied when the ES status and TCI are notified separately.

[0129] 3) As shown in Table 6, one entry may be mapped to both the ES status and TCI / QCL. When the UE receives this notification, the UE selects the TCI and ES status based on the notified entry index. Additionally, 3) may be applied when the ES status and TCI are notified uniformly. In Table 6, for example, when the entry index is 000, the ES status is specified as ES#1 and the TCI is TCI#2. ES#1 is an ES status with 2 ports and a PSD offset of 0 dB.

[0130] [Table 6]

[0131] ES status field ES status DL and UL unified TCI 000 ES#1 (2-port, 0 dB PSD offset) TCI#2 001 ES#2 (4-port, 3 dB PSD offset) TCI#4 010 ES#3 (4-port, 0 dB PSD offset) TCI#7 100 ： ：

[0132] When QCL and / or TCI are not set in this notification, the UE may perform the actions shown in the following 1)-4) starting from time slot n+l.

[0133] 1) The UE may refer to the QCL and TCI of the PDCCH or PDSCH used to notify the ES status.

[0134] 2) The UE may refer to the previously used TCI determined to be valid or invalid based on the above action 3).

[0135] 3) The UE can assume that there are no available QCL relationships and TCI. Further, the UE can perform additional measurements to obtain large-scale properties.

[0136] 4) The UE assumes that there are no available QCL relationships and TCI, and ignores PDCCH, PDSCH, PUSCH, PUCCH, RS measurements or measurement reports.

[0137] The above parameter k or parameter l can be determined by any one or more of 1)-3) shown below.

[0138] 1) k or l can be a fixed value. For example, it can also be k = 0. That is, the UE can switch to a new QCL and TCI at the time slot, symbol, or time (e.g., ms) when it receives this notification. For example, it can also be l = 4. That is, the UE can switch to a new QCL and TCI 4 time slots, 4 symbols, or 4 unit times after the time slot, symbol, or time (e.g., ms) when it receives this notification.

[0139] 2) k or l can be determined based on one or more of a parameter set, subcarrier spacing, symbol, time slot length, the capabilities of base station 10, and the capabilities of the reported UE.

[0140] 3) k or l can be notified via RRC signaling, MAC-CE, DCI, or SIB.

[0141] Action 4) can also be applied to any one or more of 1)-6) shown below.

[0142] 1) PDCCH and CORESET specified by a specific CORESET index

[0143] 2) UE-specific, non-UE-specific, or all PDSCH, PUCCH, PUSCH

[0144] 3) Dynamically or pre-configured authorized PUSCH

[0145] 4) A-CSI-RS, P-CSI-RS, TRS, BM CSI-RS, CSICSI-RS, or all CSI-RS

[0146] 5) BM SSB or all SSB

[0147] 6) SRS

[0148] The above operations 1)-4) can also be combined and applied. Additionally, which of the above operations 1)-4) is supported can depend on RRC-based settings, MAC CE, DCI / UCI-based indications, or terminal capabilities. Each supported operation can be one or multiple.

[0149] In addition, the DL channel can be SPS (Semi-persistent scheduling)-PDSCH, SSB, SIB1, PDSCH.

[0150] Furthermore, the UL channel can be CG (Configured grant)-PUSCH, PUSCH, PUCCH.

[0151] The terminal 20 can report the following terminal capabilities as UE capabilities to the base station 10.

[0152] · Whether NW-ES is supported

[0153] · Whether a new QCL type for NW-ES is supported

[0154] According to the above embodiments, the wireless communication system can perform appropriate antenna mapping and transmit power adaptation by envisioning QCL relationships suitable for operation switching for network energy saving, thereby achieving power saving.

[0155] That is, in the wireless communication system, the power consumption on the network side can be reduced.

[0156] (Device Structure)

[0157] Next, a functional structure example of the base station 10 and the terminal 20 that perform the above-described processes and operations will be described. The base station 10 and the terminal 20 include the functions of implementing the above embodiments. However, the base station 10 and the terminal 20 may each only have a part of the functions in the embodiments.

[0158] <Base Station 10>

[0159] Figure 16 is a diagram showing an example of the functional structure of the base station 10 in the embodiment of the present invention. As Figure 16 shown, the base station 10 has a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. Figure 16 The shown functional structure is only an example. As long as the operations related to the embodiment of the present invention can be performed, the function division and the names of the functional units can be arbitrary. The transmission unit 110 and the reception unit 120 can also be referred to as a communication unit.

[0160] The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. In addition, the transmitting unit 110 transmits an inter-network node message to other network nodes. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher layer information from the received signals. In addition, the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. In addition, the receiving unit 120 receives an inter-network node message from other network nodes.

[0161] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to BWP.

[0162] As described in the embodiments, the control unit 140 performs control related to BWP. It is also possible to include the functional unit related to signal transmission in the control unit 140 in the transmitting unit 110, and include the functional unit related to signal reception in the control unit 140 in the receiving unit 120.

[0163] <Terminal 20>

[0164] Figure 17 is a diagram showing an example of the functional structure of the terminal 20 in the embodiment of the present invention. As Figure 17 shown, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. Figure 17 The functional structure shown is only an example. As long as the operations involved in the embodiment of the present invention can be executed, the functional division and the names of the functional units can be arbitrary. The transmitting unit 210 and the receiving unit 220 may also be referred to as a communication unit.

[0165] The transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains a higher-layer signal from the received physical layer signal. In addition, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. And for example, in D2D communication, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH, or PSBCH, etc. from other terminals 20.

[0166] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. In addition, the setting unit 230 also stores preset setting information. The content of the setting information is, for example, information related to BWP, etc.

[0167] As described in the embodiment, the control unit 240 performs control related to BWP. It is also possible to include the functional unit related to signal transmission in the control unit 240 in the transmitting unit 210, and include the functional unit related to signal reception in the control unit 240 in the receiving unit 220.

[0168] (Hardware Structure)

[0169] The block diagrams ( Figure 16 and Figure 17 ) used in the description of the above embodiment show blocks in terms of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a single device physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly (for example, using wired, wireless, etc.) connected and these multiple devices can be used to implement it. The functional block can also be implemented by combining software in the above single device or the above multiple devices.

[0170] The functions include judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, consideration as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), assigning, etc., but are not limited to these. For example, a functional block (structural part) that exhibits a transmission function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0171] For example, the base station 10, the terminal 20, etc. in one embodiment of the present disclosure can also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 18 FIG. is an example of the hardware configuration of the base station 10 and the terminal 20 showing one embodiment of the present disclosure. The above base station 10 and terminal 20 can also be configured to physically include a computer device such as a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0172] In addition, in the following description, the term "device" can be replaced with "circuit", "equipment (device)", "unit", etc. The hardware configuration of the base station 10 and the terminal 20 can be configured to include one or more of the devices shown, or can also be configured not to include some of the devices.

[0173] Each function in the base station 10 and the terminal 20 is implemented by the following method: a predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs operations and controls at least one of the communication of the communication device 1004 or the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0174] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 can also be composed of a central processing unit (CPU: Central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc. For example, the above control unit 140, control unit 240, etc. can also be implemented by the processor 1001.

[0175] In addition, the processor 1001 reads out a program (program code), a software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes accordingly. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, Figure 16 The control unit 140 of the base station 10 shown can also be implemented by a control program stored in the storage device 1002 and operating in the processor 1001. And for example, Figure 17 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operating in the processor 1001. Although the above-described various processes are described as being executed by one processor 1001, the above-described various processes may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may also be implemented by one or more chips. In addition, the program may be transmitted from a network via a telecommunication line.

[0176] The storage device 1002 is a computer-readable recording medium, and may be constituted by at least one of, for example, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), and the like. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, etc. that can be executed in order to implement the communication method according to one embodiment of the present disclosure.

[0177] The auxiliary storage device 1003 is a computer-readable recording medium, and may be constituted by at least one of, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc), a smart card, a flash memory (for example, a card, a stick, a key drive (Key drive)), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The above storage medium may be, for example, a database, a server, and other appropriate media including at least one of the storage device 1002 and the auxiliary storage device 1003.

[0178] The communication device 1004 is hardware (a transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and can also be referred to as a network device, a network controller, a network card, a communication module, etc. For example, the communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to implement at least one of frequency-division duplexing (FDD: Frequency Division Duplex) and time-division duplexing (TDD: Time Division Duplex). For example, a transceiver antenna, an amplifier unit, a transceiver unit, a transmission path interface, etc. can also be implemented by the communication device 1004. The transceiver unit can also be physically or logically separately implemented by a transmission unit and a reception unit.

[0179] 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, an LED lamp, etc.) that performs output to the outside. In addition, the input device 1005 and the output device 1006 can also be integrally formed (e.g., a touch panel).

[0180] In addition, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 can be configured using a single bus or different buses can be used between devices.

[0181] In addition, the base station 10 and the terminal 20 can be configured to include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit: application-specific integrated circuit), a PLD (Programmable Logic Device: programmable logic device), an FPGA (Field Programmable Gate Array: field programmable gate array), etc., and a part or all of each functional block can also be implemented by this hardware. For example, the processor 1001 can also be implemented using at least one of these hardwares.

[0182] Figure 19 An example of the structure of the vehicle 2001 is shown. As Figure 19As shown, vehicle 2001 has a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gearshift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each form / embodiment described in the present disclosure can also be applied to the communication device mounted on vehicle 2001, for example, it can also be applied to communication module 2013.

[0183] The driving unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also referred to as a steering disk), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0184] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021-2029 provided in vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 can also be referred to as an ECU (Electronic Control Unit).

[0185] As signals from various sensors 2021-2029, there are a current signal from a current sensor 2021 that senses the current of the motor, a rotational speed signal of the front and rear wheels obtained by a rotational speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, a depression amount signal of the accelerator pedal obtained by an accelerator pedal sensor 2029, a depression amount signal of the brake pedal obtained by a brake pedal sensor 2026, an operation signal of the gearshift lever obtained by a gearshift lever sensor 2027, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028, and so on.

[0186] The information service unit 2012 is composed of various devices such as a car navigation system, an audio system, a speaker, a television, and a radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses the information obtained from an external device via the communication module 2013, etc., to provide various multimedia information and multimedia services to the passengers of vehicle 2001. The information service unit 2012 may include an input device (such as a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) for accepting input from the outside, and may also include an output device (such as a display, a speaker, an LED lamp, a touch panel, etc.) for implementing output to the outside.

[0187] The driving assistance system unit 2030 is composed of various devices such as millimeter-wave radars, LiDAR (Light Detection and Ranging), cameras, locators for positioning (such as GNSS, etc.), map information (such as high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyroscopic systems (such as IMUs (Inertial Measurement Units), INSs (Inertial Navigation Systems), etc.), AI (Artificial Intelligence) chips, and AI processors, which are used to provide functions for preventing accidents in advance or reducing the driving load of the driver, and one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to implement driving assistance functions or autonomous driving functions.

[0188] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via a communication port. For example, the communication module 2013 transmits and receives data between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear shifter 2006, front wheels 2007, rear wheels 2008, axles 2009, the microprocessor 2031 and the memory (ROM, RAM) 2032, and the sensors 2021 - 2029 within the electronic control unit 2010 of the vehicle 2001 via the communication port 2033.

[0189] The communication module 2013 can be controlled by the microprocessor 2031 of the electronic control unit 2010 and is a communication device capable of communicating with external devices. For example, it transmits and receives various information with external devices via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. External devices can also be, for example, base stations, mobile stations, etc.

[0190] The communication module 2013 can also transmit at least one of the signals from the various sensors 2021 - 2028 input to the electronic control unit 2010, the information obtained based on this signal, and the information based on the input from the external (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021 - 2028, the information service unit 2012, etc. can also be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 can include the above-mentioned information based on the input.

[0191] The communication module 2013 receives various information (traffic information, signal information, vehicle - to - vehicle information, etc.) sent from an external device and displays it on the information service unit 2012 of the vehicle 2001. The information service unit 2012 can also be referred to as an output unit that outputs information (for example, outputs information to devices such as a display and a speaker based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)). In addition, the communication module 2013 stores the various information received from the external device in the memory 2032 that can be utilized by the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 - 2029, etc. of the vehicle 2001 based on the information stored in the memory 2032.

[0192] (Summary of the embodiment)

[0193] As described above, according to an embodiment of the present invention, there is provided a terminal having: a receiving unit that receives information indicating a state related to network energy saving from a base station; a control unit that assumes a quasi - co - location relationship, i.e., a QCL relationship, based on the information indicating the state; and a communication unit that communicates with the base station using the assumed QCL relationship.

[0194] According to the above structure, the wireless communication system can perform appropriate antenna mapping and transmit power adaptation by assuming a QCL relationship suitable for operation switching for network energy saving, thereby achieving power saving. That is, in the wireless communication system, the power consumption on the network side can be reduced.

[0195] Alternatively, the control unit determines the number of ports, PSD offset (i.e., power spectral density offset), and transmission configuration indication state (i.e., TCI state) applied to the state based on the information indicating the state. According to this structure, the wireless communication system can perform appropriate antenna mapping and transmit power adaptation by assuming a QCL relationship suitable for operation switching for network energy saving, thereby achieving power saving.

[0196] Alternatively, the control unit assumes that the QCL target has the same receive beam as the QCL source and the receive power of the QCL target is different from that of the QCL source based on the information indicating the state. According to this structure, the wireless communication system can perform appropriate antenna mapping and transmit power adaptation by assuming a QCL relationship suitable for operation switching for network energy saving, thereby achieving power saving.

[0197] Alternatively, the control unit determines whether the QCL source specified by the information indicating the state is valid or invalid. According to this configuration, the wireless communication system can perform appropriate antenna mapping and transmit power adaptation by assuming a QCL relationship suitable for operation switching for network energy saving, thereby achieving power saving.

[0198] Alternatively, the control unit determines whether any QCL type is valid or invalid based on the antenna array mode used. According to this configuration, the wireless communication system can perform appropriate antenna mapping and transmit power adaptation by assuming a QCL relationship suitable for operation switching for network energy saving, thereby achieving power saving.

[0199] In addition, according to an embodiment of the present invention, there is provided a communication method in which a terminal performs the following steps: receiving information indicating a state related to network energy saving from a base station; assuming a quasi-co-location relationship, that is, a QCL relationship, based on the information indicating the state; and communicating with the base station using the assumed QCL relationship.

[0200] According to the above configuration, the wireless communication system can perform appropriate antenna mapping and transmit power adaptation by assuming a QCL relationship suitable for operation switching for network energy saving, thereby achieving power saving. That is, in the wireless communication system, the power consumption on the network side can be reduced.

[0201] (Supplement of the embodiment)

[0202] The above has described the embodiments of the present invention. However, the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, alternatives, substitutions, etc. Specific numerical examples have been used for the purpose of facilitating the understanding of the invention, but these numerical values are only examples and any appropriate arbitrary values can be used as long as not specifically indicated. The item classification in the above description is not essential for the present invention. The matters described in two or more items can be combined as needed, or the matters described in one item can be applied to the matters described in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. The operations of multiple functional units can be performed by one physical component, or the operation of one functional unit can be performed by multiple physical components. Regarding the processing steps described in the embodiments, the order of processing can be swapped without contradiction. For the purpose of facilitating the description of the processing, the base station 10 and the terminal 20 are illustrated using functional block diagrams, but such devices can also be implemented by hardware, software, or a combination thereof. The software that operates according to the embodiments of the present invention by the processor of the base station 10 and the software that operates according to the embodiments of the present invention by the processor of the terminal 20 can also be stored in a random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk drive (HDD), removable disk, CD-ROM, database, server, and other appropriate arbitrary storage media respectively.

[0203] In addition, the notification of information is not limited to the forms / embodiments described in the present disclosure, and other methods can also be used. For example, the notification of information can be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. In addition, the RRC signaling can be referred to as an RRC message. For example, it can also be an RRC connection setup message, an RRC connection reconfiguration message, etc.

[0204] Each form / embodiment described in the present disclosure can also be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6G (6th generation mobile communication system), xG (xth generation mobile communication system) (x is an integer or a decimal), FRA (Future Radio Access), NR (new Radio), NX (New radio access), FX (Future generation radio access), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate systems, and at least one of the next-generation systems extended, modified, created, and defined based on these systems. In addition, multiple systems can be combined (for example, a combination of at least one of LTE and LTE-A and 5G) and applied.

[0205] For the processing steps, timing sequences, processes, etc. of each form / embodiment described in this specification, the order can be swapped without contradiction. For example, for the methods described in the present disclosure, the elements of various steps are presented in an exemplary order, but are not limited to the specific order presented.

[0206] In this specification, specific actions performed by base station 10 are sometimes also performed by its upper node according to circumstances. In a network composed of one or more network nodes including base station 10, it is obvious that various actions performed for communication with terminal 20 can be carried out by at least one of base station 10 and other network nodes other than base station 10 (for example, MME or S-GW etc. are considered, but not limited to these). In the above, the case where there is one other network node other than base station 10 is illustrated, but the other network nodes can also be a combination of multiple other network nodes (for example, MME and S-GW).

[0207] The information or signals etc. described in this disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It can also be input or output via multiple network nodes.

[0208] The information etc. input or output can be stored in a specific location (for example, memory), or can also be managed using a management table. The information etc. input or output can be rewritten, updated or appended. The information etc. output can also be deleted. The information etc. input can also be sent to other devices.

[0209] The determination in this disclosure can be made by a value represented by 1 bit (0 or 1), can also be made by a Boolean value (true or false), and can also be made by a numerical comparison (for example, comparison with a predetermined value).

[0210] For software, no matter it is called software, firmware, middleware, microcode, hardware description language, or by other names, it should be widely interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc.

[0211] In addition, software, commands, information, etc. can also be transmitted and received via a transmission medium. For example, when using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (infrared, microwave, etc.) to send software from a web page, server or other remote source, at least one of these wired technologies and wireless technologies is included in the definition of the transmission medium.

[0212] The information, signals, etc. described in this disclosure can also be represented using any one of a variety of different technologies. For example, the data, commands, instructions (command), information, signals, bits, symbols, chips, etc. that may be involved in the overall description above can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination of these.

[0213] In addition, the terms described in this disclosure and the terms required to understand this disclosure can be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol can also be a signal (signaling). In addition, a signal can also be a message. In addition, a component carrier (CC: Component Carrier) can also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0214] The terms "system" and "network" used in this disclosure can be used interchangeably.

[0215] In addition, the information, parameters, etc. described in this disclosure can be represented using absolute values, relative values with respect to a predetermined value, or other corresponding information. For example, radio resources can be indicated using indices.

[0216] The names used for the above parameters are non-restrictive names in any aspect. Furthermore, the mathematical expressions and the like using these parameters are sometimes different from the content explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, so the various names assigned to these various channels and information elements are non-restrictive names in any aspect.

[0217] In this disclosure, the terms "base station (BS: Base Station)", "radio base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", etc. can be used interchangeably. Sometimes, base stations are also referred to using terms such as macro cell, small cell, femto cell, pico cell, etc.

[0218] A base station can accommodate one or more (e.g., 3) cells. When the base station accommodates multiple cells, the overall coverage area of the base station can be divided into multiple smaller areas, and each of the smaller areas can also provide communication services through a base station subsystem (e.g., a small indoor base station RRH: Remote Radio Head). Terms such as "cell" or "sector" refer to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services within the coverage range.

[0219] In the present disclosure, the base station sending information to the terminal can also be replaced by the base station instructing the terminal to perform control / action based on the information.

[0220] In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" can be used interchangeably.

[0221] Regarding the mobile station, those skilled in the art sometimes also refer to it using the following terms: subscriber station, mobile unit, subscriber unit, radio 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 appropriate terms.

[0222] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving body, the moving body itself, etc. The moving body refers to an object that can move, and the moving speed is arbitrary. In addition, of course, the case where the moving body stops is also included. The moving body includes, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, two-wheeled trailers, rickshaws, ships (ship and other watercraft), airplanes, rockets, artificial satellites, Drones (registered trademark), multi-rotor helicopters, quad-rotor helicopters, balloons, and objects mounted on them, and is not limited thereto. In addition, the moving body may also be a moving body that autonomously travels based on an operation instruction. It may be a means of transportation (e.g., an automobile, an airplane, etc.), or a moving body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanoid or non-humanoid). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0223] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, a structure in which communication between a base station and a user terminal is replaced by communication between a plurality of terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) can also apply each form / embodiment of the present disclosure. In this case, it may also be configured such that the terminal 20 has the functions of the above-described base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0224] Similarly, the user terminal in the present disclosure may be replaced by a base station. In this case, it may also be configured such that the base station has the functions of the above-described user terminal.

[0225] As used in this disclosure, terms such as "determining" sometimes encompass a variety of actions. For example, "determining" may include deeming an item that has been judged, calculated, computed, processed, derived, investigated, looked up / search / inquired (e.g., searching in a table, database, or other data structure), or ascertained as having been "determined". Additionally, "determining" may include deeming an item that has been received (e.g., receiving information), transmitted (e.g., transmitting information), input, output, accessed (e.g., accessing data in memory), etc. as having been "determined". Further, "determining" may include deeming an item that has been resolved, selected, chosen, established, compared, etc. as having been "determined". That is, "determining" may include deeming certain actions as having been "determined". Additionally, "determining" may be replaced by "assuming", "expecting", "considering", etc.

[0226] Terms such as "connected" and "coupled" or any variations of these terms are intended to represent all direct or indirect connections or couplings between two or more elements, and may include cases where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be a physical coupling or connection, a logical coupling or connection, or a combination of these. For example, "access" may be used to replace "connected". In the context of this disclosure, it can be considered that two elements "connect" or "couple" to each other using at least one of one or more wires, cables, and printed electrical connections, and, as some non-limiting and non-inclusive examples, using electromagnetic energy having wavelengths in the radio frequency domain, microwave region, and optical (including both visible and invisible) regions to "connect" or "couple" to each other.

[0227] The reference signal may be abbreviated as RS (Reference Signal), or may be called a pilot according to the applied standard.

[0228] The description "based on" used in this disclosure does not mean "only based on" unless otherwise clearly described. In other words, the description "based on" means both "only based on" and "at least based on".

[0229] Any reference to elements using terms such as "first", "second", etc. used in this disclosure does not entirely limit the quantity or order of these elements. These terms may be used in this disclosure as a convenient method for distinguishing between two or more elements. Therefore, the reference to the first element and the second element does not mean that only two elements can be adopted or that the first element must precede the second element in any form.

[0230] The "unit" in the structure of each of the above devices may also be replaced with a "section", "circuit", "equipment", etc.

[0231] When the terms "include", "including" and their variants are used in this disclosure, these terms mean inclusive in the same way as the term "comprising". Also, the term "or" used in this disclosure does not refer to exclusive or.

[0232] A radio frame may be composed of one or more frames in the time domain. In the time domain, each of the one or more frames may be called a subframe. A subframe may also be composed of one or more time slots in the time domain. A subframe may also have a fixed time length (e.g., 1 ms) independent of the numerology.

[0233] The numerology may be communication parameters applied to at least one of transmission and reception of a certain signal or channel. The numerology may represent, for example, at least one of subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame structure, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0234] A time slot can be composed of one or more symbols (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A time slot can be a time unit based on a parameter set.

[0235] A time slot can contain multiple mini-slots. Each mini-slot can be composed of one or more symbols in the time domain. In addition, a mini-slot can also be referred to as a sub-slot. A mini-slot can be composed of fewer symbols than a time slot. The PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot can be called PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using a mini-slot can be called PDSCH (or PUSCH) mapping type B.

[0236] A radio frame, a sub-frame, a time slot, a mini-slot, and a symbol all represent time units for transmitting signals. A radio frame, a sub-frame, a time slot, a mini-slot, and a symbol can be respectively given corresponding other names.

[0237] For example, 1 sub-frame can be called a Transmission Time Interval (TTI), multiple consecutive sub-frames can also be called a TTI, and 1 time slot or 1 mini-slot can also be called a TTI. That is, at least one of a sub-frame and a TTI can be a sub-frame (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1 - 13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI can be called a time slot, a mini-slot, etc. instead of a sub-frame.

[0238] Here, a TTI is, 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 the bandwidth and transmission power that can be used in each terminal 20) to each terminal 20 in units of TTI. In addition, the definition of a TTI is not limited to this.

[0239] A TTI can be a transmission time unit for a data packet (transmission block), a code block, a codeword, etc. after channel coding, or a processing unit for scheduling, link adaptation, etc. In addition, when a TTI is given, the actual time interval (such as the number of symbols) to which a transmission block, a code block, a codeword, etc. are mapped can be shorter than the TTI.

[0240] In addition, when one time slot or one mini time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can be the minimum time unit for scheduling. In addition, the number of time slots (mini time slots) that constitute the minimum time unit for scheduling can be controlled.

[0241] A TTI having a time length of 1 ms is also referred to as a normal TTI (TTI in LTE Rel.8 - 12), normal TTI, long TTI, normal subframe, long subframe, time slot, etc. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini time slot, sub - time slot, time slot, etc.

[0242] In addition, for a long TTI (e.g., normal TTI, subframe, etc.), it can be understood as a TTI having a time length exceeding 1 ms, and for a short TTI (e.g., shortened TTI, etc.), it can be understood as a TTI having a TTI length less than that of the long TTI and not less than 1 ms.

[0243] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined according to the parameter set.

[0244] In addition, the time domain of an RB can contain one or more symbols and can be the length of 1 time slot, 1 mini time slot, 1 subframe, or 1 TTI. One TTI, one subframe, etc. can be composed of one or more resource blocks respectively.

[0245] In addition, one or more RBs can also be referred to as physical resource blocks (PRB), sub - carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc.

[0246] In addition, a resource block can be composed of one or more resource elements (RE). For example, one RE can be a radio resource area of one subcarrier and one symbol.

[0247] A bandwidth part (BWP) (which may also be referred to as partial bandwidth, etc.) may also represent a subset of consecutive common resource blocks (common RBs) used for a certain parameter set in a certain carrier. Herein, the common RBs can be determined by the indices of the RBs based on the common reference point of the carrier. The PRBs can be defined in a certain BWP and numbered within that BWP.

[0248] The BWP can include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs can be set for a UE within one carrier.

[0249] At least one of the set BWPs can be active, and it can be assumed that the UE does not transmit or receive a predetermined signal / channel outside the active BWP. In addition, in the present disclosure, terms such as "cell" and "carrier" can be replaced by "BWP".

[0250] The structures such as the above-mentioned radio frames, subframes, time slots, mini time slots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini time slots included in a time slot, the number of symbols and RBs included in a time slot or mini time slot, the number of subcarriers included in an RB, and the number of symbols, symbol length, cyclic prefix (CP) length, etc. within a TTI can be changed in various ways.

[0251] In the present disclosure, for example, when articles are added through translation such as a, an, and the in English, the present disclosure also includes the case where the nouns following these articles are in the plural form.

[0252] In the present disclosure, the term "A and B are different" can mean "A and B are mutually different". In addition, this term can also mean "A and B are respectively different from C". Terms such as "separate" and "combine" can be interpreted in the same way as "different".

[0253] Each form / embodiment described in the present disclosure can be used alone, combined, or switched according to the execution. In addition, the notification of predetermined information is not limited to being explicitly (e.g., the notification of "is X") performed, and can also be implicitly (e.g., without the notification of the predetermined information) performed.

[0254] As described above, the present disclosure has been explained in detail. However, for those skilled in the art, it should be clear that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented in the form of modifications and changes without departing from the gist and scope of the present disclosure determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate, and it has no restrictive meaning for the present disclosure.

[0255] Reference Numeral Explanation

[0256] 10: Base Station

[0257] 110: Transmitting Unit

[0258] 120: Receiving Unit

[0259] 130: Setting Unit

[0260] 140: Control Unit

[0261] 20: Terminal

[0262] 210: Transmitting Unit

[0263] 220: Receiving Unit

[0264] 230: Setting Unit

[0265] 240: Control Unit

[0266] 1001: Processor

[0267] 1002: Storage Device

[0268] 1003: Auxiliary Storage Device

[0269] 1004: Communication Device

[0270] 1005: Input Device

[0271] 1006: Output Device

[0272] 2001: Vehicle

[0273] 2002: Driving Unit

[0274] 2003: Steering Unit

[0275] 2004: Accelerator Pedal

[0276] 2005: Brake Pedal

[0277] 2006: Gear Lever

[0278] 2007: Front Wheel

[0279] 2008: Rear Wheel

[0280] 2009: Axle

[0281] 2010: Electronic Control Unit

[0282] 2012: Information Service Department

[0283] 2013: Communication Module

[0284] 2021: Current Sensor

[0285] 2022: Rotational Speed Sensor

[0286] 2023: Air Pressure Sensor

[0287] 2024: Vehicle Speed Sensor

[0288] 2025: Acceleration Sensor

[0289] 2026: Brake Pedal Sensor

[0290] 2027: Gear Shift Lever Sensor

[0291] 2028: Object Detection Sensor

[0292] 2029: Accelerator Pedal Sensor

[0293] 2030: Driving Assistance System Department

[0294] 2031: Microprocessor

[0295] 2032: Memory (ROM, RAM)

[0296] 2033: Communication Port (IO Port)

Claims

1. A terminal, comprising: a receiving unit configured to receive from a base station information indicating a state related to network energy saving; a control unit configured to assume a quasi co-location relationship, i.e., a QCL relationship, based on the information indicating the state; and a communication unit configured to communicate with the base station using the assumed QCL relationship.

2. The terminal according to claim 1, wherein the control unit determines a number of ports, a PSD offset, i.e., a power spectral density offset, and a transmission configuration indication state, i.e., a TCI state, to be applied to the state, based on the information indicating the state.

3. The terminal according to claim 1, wherein the control unit assumes that a QCL target is the same receiving beam as a QCL source and a received power of the QCL target is different from that of the QCL source, based on the information indicating the state.

4. The terminal according to claim 1, wherein the control unit determines whether a QCL source specified by the information indicating the state is valid or invalid.

5. The terminal according to claim 1, wherein the control unit determines whether an arbitrary QCL type is valid or invalid, based on an antenna array pattern used.

6. A communication method, wherein the following steps are performed by a terminal: receiving from a base station information indicating a state related to network energy saving; assuming a quasi co-location relationship, i.e., a QCL relationship, based on the information indicating the state; and communicating with the base station using the assumed QCL relationship.

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