Terminal, base station and communication method

Abstract

The terminal comprises: a receiving unit, which receives a signaling for putting a secondary cell into sleep mode and control information via the secondary cell; a control unit, which, when the receiving unit receives a signaling for putting the secondary cell into sleep mode, assumes that a channel in a primary cell is scheduled using the control information; and a communication unit, which uses the channel in the primary cell to perform transmission or reception.

Description

Technical Field

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

[0002] In NR (New Radio) (also called 5G), which is the successor system of LTE (Long Term Evolution), technologies that meet the requirements of large-capacity systems, high data transmission speeds, low latency, simultaneous connection of multiple terminals, low costs, and power saving are being studied (for example, non-patent document 1).

[0003] Dynamic spectrum sharing (DSS) technology is being studied to enable LTE and NR to coexist in the same band (e.g., non-patent document 2). By enabling different RATs (Radio Access Technologies) to coexist in a single carrier, it is possible to flexibly respond to business needs during system generation switching.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 38.300 V15.8.0 (2019-12)

[0007] Non-patent document 2: 3GPP TSG RAN Meeting #86RP-192678 (2019-12) Summary of the invention

[0008] Problems to be solved by the invention

[0009] In the current DSS specification, resources for sending and receiving control signals are set in LTE terminals and NR terminals respectively. Since the resources that can configure control signals are predetermined and the systems coexist in a single carrier, it is assumed that the resources for sending and receiving control signals are insufficient compared to the case where the system operates independently in other carriers.

[0010] The present invention has been made in view of the above circumstances, and can alleviate the shortage of resources for transmitting and receiving control signals when a plurality of RATs (Radio Access Technology) coexist in a single carrier in a wireless communication system.

[0011] Means for solving problems

[0012] According to the disclosed technology, a terminal is provided, which has: a receiving unit, which receives a signaling for putting a secondary cell into sleep mode and control information via the secondary cell; a control unit, which, when the receiving unit receives a signaling for putting the secondary cell into sleep mode, envisions scheduling a channel in a primary cell through the control information; and a communication unit, which uses the channel in the primary cell to perform sending or receiving.

[0013] Effects of the Invention

[0014] According to the disclosed technology, in a wireless communication system, when a plurality of RATs (Radio Access Technologies) coexist on a single carrier, it is possible to alleviate the shortage of resources for transmitting and receiving control signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention.

[0016] Figure 2 This is a diagram showing an example of a downlink channel configuration based on DSS.

[0017] Figure 3 This is a diagram showing an example of uplink channel configuration based on DSS.

[0018] Figure 4 This is a diagram showing an example (1) of frequency allocation in DSS.

[0019] Figure 5 This is a diagram showing example (2) of frequency allocation in DSS.

[0020] Figure 6 This is a diagram showing an example of channel configuration for an LTE downlink.

[0021] Figure 7 This is a diagram showing an example of a channel configuration for an NR downlink.

[0022] Figure 8 This is a diagram showing an example of channel configuration for DSS-based LTE and NR downlinks.

[0023] Fig. 9 This is a diagram for explaining an example of cross-carrier scheduling.

[0024] Fig.10 This is a diagram for explaining example (1) of cross-carrier scheduling in an embodiment of the present invention.

[0025] Fig.11 This is a diagram for explaining an example of specifications related to cross-carrier scheduling.

[0026] Fig.12 This is a diagram for illustrating example (2) of cross-carrier scheduling in an embodiment of the present invention.

[0027] Fig.13 It is a timing diagram for illustrating example (2) of cross-carrier scheduling in an embodiment of the present invention.

[0028] Fig.14 This is a diagram showing an example (1) of a specification change related to cross-carrier scheduling in an embodiment of the present invention.

[0029] Fig.15 This is a diagram showing example (2) of a specification change related to cross-carrier scheduling in an embodiment of the present invention.

[0030] Fig.16 This is a diagram for explaining an example of MAC-CE in the embodiment of the present invention.

[0031] Fig.17 This is a diagram for illustrating example (3) of cross-carrier scheduling in an embodiment of the present invention.

[0032] Fig.18 It is a timing diagram for illustrating example (3) of cross-carrier scheduling in an embodiment of the present invention.

[0033] Fig.19 It is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.

[0034] Fig. 20 This is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.

[0035] Fig.21 This is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 in the embodiment of the present invention. DETAILED DESCRIPTION

[0036] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is only an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0037] When the wireless communication system according to the embodiment of the present invention operates, existing technologies are appropriately used. However, the existing technologies are, for example, existing LTE, but are not limited to existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and methods after LTE-Advanced (such as NR).

[0038] In addition, in the embodiments of the present invention described below, the terms 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), PUSCH (Physical Uplink Shared Channel), etc. used in the existing LTE are used. These are for the convenience of recording, and the same signals, functions, etc. may 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 in NR, the signals used are not necessarily marked as "NR-".

[0039] Furthermore, in the embodiments of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0040] In the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0041] Figure 1 FIG. 1 is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. Figure 1 In the figure, one base station 10 and one terminal 20 are shown, but this is just an example, and there may be a plurality of each.

[0042] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by 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 sends a synchronization signal and system information to the terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is sent, for example, through NR-PBCH, also called broadcast information. The synchronization signal and system information may also be referred to as SSB (SS / PBCH block). Figure 1 As shown, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink), and receives a control signal or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to send and receive signals. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output)-based communications to DL or UL. In addition, both the base station 10 and the terminal 20 can communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). Furthermore, the terminal 20 can communicate via the primary cell of the base station 10 based on DC (Dual Connectivity) and the primary and secondary cell group cells (PSCell: Primary Secondary Cell group Cell) of other base stations 10.

[0043] The terminal 20 is a communication device having a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, or a communication module for M2M (Machine-to-Machine: machine-to-machine communication). Figure 1 As shown, the terminal 20 receives a control signal or data from the base station 10 via DL and transmits a control signal or data to the base station 10 via UL, thereby utilizing 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 propagation path quality based on the reception result of the reference signal.

[0044] The following is an example of DSS (Dynamic Spectrum Sharing) technology that allows LTE and NR to coexist in the same band. According to DSS technology, by allowing different RATs (Radio Access Technology) to coexist in a single carrier, it is possible to flexibly respond to business needs during system generation switching. According to DSS technology, different RATs can be operated through a single carrier.

[0045] Figure 2 This is a diagram showing an example of a downlink channel configuration based on DSS. Figure 2 The time domain shown corresponds to 1 subframe of LTE. Figure 2 As shown in FIG. 1 , in the downlink, “LTE-CRS (Cell specific reference signal: cell specific reference signal)”, “LTE-PDCCH” and “LTE-PDSCH” are transmitted as signals or channels of LTE. Figure 2 As shown in FIG. 1 , in the downlink, “NR-PDCCH” and “NR-PDSCH” are transmitted as NR channels. For example, although not shown in the figure, “NR-PDSCH” may also include resources for configuring DM-RS (Demodulation reference signal). Figure 2 As shown, "LTE-CRS" is sometimes configured adjacent to "NR-PDSCH".

[0046] Figure 3 FIG. 4 is a diagram showing an example of a channel configuration of an uplink based on DSS. Figure 3 As shown, the uplink channels or signals of LTE and NR are configured to share the frequency band. Figure 3 As shown, for example, from lower frequency to higher frequency, they are configured in the order of “NR-PUCCH”, “LTE-PUCCH”, “LTE-PRACH”, “LTE-PUSCH”, “NR-PUSCH”, “NR-PRACH”, “LTE-PUSCH”, “LTE-PUCCH”, and “NR-PUCCH”. In addition, in the frequency domain configured with “LTE-PUSCH”, “NR-PUSCH”, and “NR-PRACH”, “LTE-SRS (Sounding Reference Signal)” or “NR-SRS” may also be configured.

[0047] Figure 4 is a diagram showing an example (1) of frequency allocation in DSS. Figure 4As shown, it is assumed that in carrier #1, BS (Basestation) provides LTE, in carrier #2, BS provides LTE and NR, in carrier #3, BS provides NR, and in carrier #4, BS provides NR.

[0048] For example, for NR UE (User Equipment: user device), such as Figure 4 As shown in Mode 1, the LTE PCell (Primary Cell) can be configured in carrier #1, the NR PSCell (Primary Secondary Cell) can be configured in carrier #2, the SCell (Secondary Cell) can be configured in carrier #3, and the SCell can be configured in carrier #4. In addition, for example, for NR UE, Figure 4 As shown in Mode 2, the PCell of LTE and the PSCell of NR can be configured in carrier #2, the SCell can be configured in carrier #3, and the SCell can be configured in carrier #4. In addition, for example, for NR UE, Figure 4 As shown in mode 3, the NR's PCell can be configured in carrier #2, the SCell can be configured in carrier #3, and the SCell can be configured in carrier #4.

[0049] For example, for LTE UE, such as Figure 4 As shown in Mode 1, the PCell of LTE can be configured in carrier #1. In addition, for example, for LTE UE, Figure 4 As shown in Mode 2, a PCell of LTE may be configured in carrier #2. In addition, for example, for LTE UE, Figure 4 As shown in Mode 3, the PCell of LTE can be configured in carrier #1, and the SCell of LTE can be configured in carrier #2. In addition, for example, for LTE UE, Figure 4 As shown in mode 4, the LTE SCell can be configured in carrier #1 and the LTE PCell can be configured in carrier #2.

[0050] Figure 5 is a diagram showing example (2) of frequency allocation in DSS. Figure 5 As shown, it is assumed that in carrier #1, the BS provides LTE and NR, in carrier #2, the BS provides NR, and in carrier #3, the BS provides NR.

[0051] For example, for NR UE, such as Figure 5As shown in Mode 1, the PCell of LTE and the SCell of NR can be configured in carrier #1, the PSCell of NR can be configured in carrier #2, and the SCell of NR can be configured in carrier #3. In addition, for example, for NR UE, Figure 5 As shown in Mode 2, the PCell of LTE and the PSCell of NR can be configured in carrier #1, the PSCell of NR can be configured in carrier #2, and the SCell of NR can be configured in carrier #3. In addition, for example, for NR UE, Figure 5 As shown in mode 3, the NR's PCell can be configured in carrier #1, the NR's PSCell can be configured in carrier #2, and the NR's SCell can be configured in carrier #3.

[0052] For example, for LTE UE, such as Figure 5 As shown in mode 1, the LTE PCell can be configured in carrier #1.

[0053] Table 1 shows examples of synchronization signals or reference signals for LTE and NR for each purpose.

[0054] [Table 1]

[0055] Purpose LTE NR Synchronous (coarse) LTE PSS / SSS NR PSS / SSS Synchronization (fine) CRS NR TRS Downlink Propagation Path Estimation LTE CRS / CSI-RS NR CSI-RS Uplink Propagation Path Estimation LTE SRS NR SRS Phase Noise Estimation N / A NR PT-RS Data decoding LTE CRS / DM-RS NR DM-RS Broadcast signal decoding CRS NR PBCH DM-RS

[0056] As shown in Table 1, in LTE and NR, signals are respectively specified for the same or similar purposes. Purpose may also mean usage. For coarse synchronization, LTE-PSS / SSS is used in LTE, and NR-PSS / SSS is used in NR. For synchronization with higher precision, CRS is used in LTE, and NR-TRS is used in NR. NR-TRS may also be referred to as NR-CSI (Channel State Information)-RS for tracking. For downlink propagation path estimation, LTE-CRS / CSI-RS is used in LTE, and NR-CSI-RS is used in NR. For uplink propagation path estimation, LTE-SRS is used in LTE, and NR-SRS is used in NR. For phase noise estimation, in LTE, no signal for this purpose is set, and in NR, NR-PT (Phase tracking)-RS is used. For data decoding, LTE-CRS / DM-RS is used in LTE, and NR-DM-RS is used in NR. For broadcast signal decoding, in LTE, CRS is used, and in NR, NR-PBCH-DM-RS is used.

[0057] In addition, even if the names are the same, the structure of the physical signal may be different. For example, the structure of the physical signal is different in LTE CSI-RS and NR CSI-RS.

[0058] Figure 6 This is a diagram showing an example of channel configuration for an LTE downlink. Figure 6 The time domain shown corresponds to one subframe of LTE, and the frequency domain corresponds to one resource block. Figure 6 As shown, LTE-CRS is transmitted as a reference signal, and LTE-PDCCH is transmitted as a control signal.

[0059] Figure 7 This is a diagram showing an example of a channel configuration for an NR downlink. Figure 7 The time domain shown corresponds to 1 time slot of NR, the frequency domain corresponds to 1 resource block, and the subcarrier spacing is set to 15kHz. Figure 7 As shown, NR-DM-RS is sent as a reference signal and NR-PDCCH is sent as a control signal.

[0060] Figure 8 : is a diagram showing an example of channel configuration for LTE and NR downlink based on DSS. In the current DSS specification, signals for the same purpose are sent to LTE terminals and NR terminals respectively. Figure 8 As shown, when LTE signals and NR signals are sent separately, the overhead increases and the resources for sending data decrease.

[0061] In addition, the resources for LTE-PDCCH and the resources for NR-PDCCH overlap at the beginning 1-3 symbols of the time slot. Therefore, when DSS is set, the resources for LTE-PDCCH or NR-PDCCH are limited compared to the case where DSS is not set. For example, if LTE-PDCCH is configured in 2 symbols and NR-PDCCH is configured in 1 symbol, each resource is reduced compared to the case where DSS is not set.

[0062] Moreover, in the current standard specification, the only cell that can schedule the primary cell (PCell: Primary Cell) or the primary sub-cell group cell (PSCell: Primary SCG Cell) is the current cell (hereinafter, the primary cell or the primary sub-cell group cell is referred to as P(S)Cell). That is, the PDCCH in the secondary cell (SCell: Secondary Cell) cannot schedule the PDSCH or PUSCH in the P(S)Cell. Therefore, when carrier aggregation is performed when DSS is applied, there is a concern that the PDCCH resources of the P(S)Cell are insufficient.

[0063] Here, the shortage of PDCCH resources in the P(S)Cell is reduced through cross-carrier scheduling. Fig. 9 is a diagram for explaining an example of cross-carrier scheduling. Fig. 9 In the example, P(S)Cell is configured in CC#x, SCell is configured in CC#y, and other SCells are configured in CC#z. Fig. 9 As shown, the existing cross-carrier scheduling schedules the PDSCH or PUSCH of the SCell through the PDCCH of the P(S)Cell, or schedules the PDSCH or PUSCH of other SCells through the PDCCH of the SCell.

[0064] Fig.10 is a diagram for explaining example (1) of cross-carrier scheduling in an embodiment of the present invention. On the other hand, in the cross-carrier scheduling in an embodiment of the present invention, Fig.10 As shown, in addition to the scheduling of PDCCH of P(S)Cell to PDSCH or PUSCH of SCell and the scheduling of PDCCH of SCell to PDSCH or PUSCH of other SCells, the scheduling of PDCCH of SCell to PDSCH or PUSCH of P(S)Cell can also be performed.

[0065] Fig.11 is a diagram for explaining an example of a specification related to cross-carrier scheduling. As described above, the PDSCH or PUSCH of the P(S)Cell can also be cross-carrier scheduled through the PDCCH of the SCell. Fig.11 When the information element "schedulingCellInfo" related to cross-carrier scheduling is set to "other", the terminal 20 can assume that the PDSCH or PUSCH of the SCell or P(S)Cell is scheduled.

[0066] Fig.11The "schedulingCellInfo" shown is an information element for making settings related to cross-carrier scheduling, and can be set for each cell. When "schedulingCellInfo" is set to "other", it means that the target cell is scheduled by other cells. When "schedulingCellInfo" is set to "own", it means that the target cell is scheduled by this cell. In addition, "cif-Presence" is an information element indicating whether cross-carrier scheduling is performed when scheduling is performed in this cell. For example, when "cif-Presence" is "true", the value of CIF (carrier indicator field) that schedules this cell can be "0". "schedulingCellID" is an information element indicating which cell schedules this cell when scheduled by other cells. The information indicating the cell can be "ServCellIndex". When scheduled by other cells, "cif-InschedulingCell" indicates the value of CIF corresponding to this cell contained in the control information of other cells (for example, DCI (Downlink Control Information)), which can be a value from 1 to 7.

[0067] Fig.12 is a diagram for explaining example (2) of cross-carrier scheduling in an embodiment of the present invention. Fig.12 In the example, the P(S)Cell is configured in CC#x and the SCell is configured in CC#y. For example, assume that in a certain terminal 20, for the P(S)Cell, "schedulingCellInfo" is set to "other", "schedulingCellID" is set to "n1", and "cif-InschedulingCell" is set to "n2". In addition, "n2" may not be 0, but may be set to a value that is not usually used and indicates the P(S)Cell.

[0068] Here, if Fig.12As shown, when SCell (ServCellIndex = n1) is activated by MAC-CE (Medium Access Control-Control Element), cross-carrier scheduling can be assumed to be performed by DCI with CIF "n2" in the SCell (ServCellIndex = n1) regarding the PDSCH or PUSCH of the P(S)Cell set in the terminal 20. In addition, activating the SCell (ServCellIndex = n1) by MAC-CE can be replaced by putting the SCell (ServCellIndex = n1) to sleep (dormant).

[0069] In addition, it can be assumed that the CIF included in the DCI of the SCell when the PDSCH or PUSCH of the P(S)Cell is scheduled is 0 bits. This is because the number of P(S)Cells set in the terminal 20 is 1. That is, when the CIF included in the DCI of the SCell is 0 bits, the terminal 20 can assume that the PDSCH or PUSCH of the P(S)Cell is scheduled, and when the CIF included in the DCI of the SCell is "n2" indicated by "cif-InschedulingCell", the terminal 20 can assume that the PDSCH or PUSCH of the P(S)Cell is scheduled.

[0070] On the other hand, Fig.12 As shown, when the SCell (ServCellIndex = n1) is deactivated by MAC-CE, the "schedulingCellInfo" set in the P(S)Cell can be replaced from "other" to "own". That is, it can be assumed that the PDSCH or PUSCH of the P(S)Cell set in the terminal 20 is scheduled by the DCI of the P(S)Cell.

[0071] Fig.13 This is a timing diagram for illustrating example (2) of cross-carrier scheduling in an embodiment of the present invention. Fig.13 , description and Fig.12 An example of actions related to cross-carrier scheduling is shown.

[0072] In step S11 , the base station 10 sets schedulingCellInfo=other(schedulingCellId=n1, cif-InSchedulingCell=n2) in the P(S)Cell set by the terminal 20 .

[0073] Next, the terminal 20 determines whether the SCell (ServCellIndex=n1) is activated by the base station 10. If the SCell is activated ("Yes" in S12), the process proceeds to step S13, and if the SCell is not activated ("No" in S12), the process proceeds to step S14. The case where the SCell is not activated in step S12 may refer to the case where the SCell is deactivated.

[0074] In step S13, the terminal 20 assumes that the PDSCH or PUSCH of the P(S)Cell is cross-carrier scheduled by the DCI of the SCell (ServCellIndex=n1). The CIF included in the DCI may be n2 or 0 bits.

[0075] On the other hand, in step S14, the terminal 20 replaces schedulingCellInfo=other with own, and assumes that the PDSCH or PUSCH of the P(S)Cell is scheduled by the DCI of the P(S)Cell.

[0076] The terminal 20 performs communication using the PDSCH or PUSCH of the scheduled P(S)Cell.

[0077] Here, Table 2 shows an example of specification changes related to cross-carrier scheduling.

[0078] [Table 2]

[0079]

[0080] As shown in Table 2, the action indicated by "other" only specifies cells scheduled by PDCCHs of other cells. That is, the cell in which "other" is set is not limited to SCell, and "other" may be set in P(S)Cell.

[0081] Fig.14 is a diagram showing an example (1) of a specification change related to cross-carrier scheduling in an embodiment of the present invention. The terminal 20 may assume that both "own" and "other" are set in "schedulingCellInfo". Fig.14 As shown, "own" and "other" may not be selected exclusively, but both may be set. That is, in the P(S)Cell, both the scheduling based on the own cell and the scheduling based on the SCell may be set.

[0082] Fig.15is a diagram showing an example (2) of a specification change related to cross-carrier scheduling in an embodiment of the present invention. The terminal 20 can set any one of "own", "other" and "conditions" in "schedulingCellInfo". Fig.15 As shown, in "conditions", information elements included in both "own" and "other" are set. That is, in P(S)Cell, both scheduling based on the own cell and scheduling based on SCell can be set. In addition, the name "conditions" is just an example, and the same setting can also be performed through information elements with other names.

[0083] Fig.16 FIG. 2 is a diagram for explaining an example of MAC-CE in an embodiment of the present invention. The terminal 20 may assume that during cross-carrier scheduling, the MAC-CE is used to signal activation, deactivation, or dormancy. Fig.16 As shown, for Cell#x serving as SCell, signaling indicating activation or deactivation and signaling indicating sleep can be performed through MAC-CE.

[0084] For example, when the signaling indicating activation or deactivation is not notified and the signaling indicating sleep is notified by 1 indicating sleep, Cell#x can migrate to the sleep state. In addition, for example, when the signaling indicating activation or deactivation is notified by 1 indicating activation and the signaling indicating sleep is notified by 1 indicating sleep, the terminal 20 can migrate to the sleep state. In addition, the above signaling is not limited to MAC-CE, and can also be performed through L1 notification (indication).

[0085] Fig.17 This is a diagram for explaining example (3) of cross-carrier scheduling in the embodiment of the present invention. When setting cross-carrier scheduling, the terminal 20 can decide to schedule the PDSCH of the P(S)Cell or the SCell of the PUSCH according to the status of the SCell (status: activation / deactivation / dormant).

[0086] In the configuration Fig.17When DCI is set in the SCell in the dormant state, as in the SCell of CC#4 shown in the figure, the terminal 20 can assume that the cell scheduled by the DCI is the P(S)Cell. The terminal 20 can assume that the CIF of the DCI is 0 bits, and the terminal 20 can also assume that the value is pre-set by "cif-InschedulingCell". In addition, the "schedulingCellInfo" set in the P(S)Cell can be "own" or replaced by "other" when the DCI is received.

[0087] On the other hand, when DCI is not set in the dormant SCell, the "schedulingCellInfo" set in the P(S)Cell can be assumed to be "own". In addition, when the "schedulingCellInfo" set in the P(S)Cell is "other", it can be replaced with "own".

[0088] As described above, since the DCI of the SCell in the dormant state is used to schedule the P(S)Cell, one of the multiple SCells can be dynamically selected to schedule the P(S)Cell. In addition, for example, since multiple SCells are in the dormant state at the same time, the priority of scheduling the P(S)Cell between the multiple SCells can be pre-set or specified.

[0089] In addition, Fig.17 The following example is also shown: cross-carrier scheduling is performed on the SCell configured in CC#2 through the DCI of the SCell configured in CC#1. That is, in the SCell configured in CC#2, "schedulingCellID" can be set to "2" and "cif-InschedulingCell" can be set to "3". As mentioned above, CIF can correspond to the same value as ServCellIndex. However, in the SCell that schedules the P(S)Cell, CIF=0 represents the current cell, CIF=predetermined special value represents the P(S)Cell, and when the CIF is 0 bits, it can also represent the P(S)Cell.

[0090] In addition, when setting cross-carrier scheduling, the SCell for scheduling the PDSCH or PUSCH of the P(S)Cell may be determined based on the L1 notification indicating dormancy or non-dormancy. For example, when the SCell is moved to the dormancy state by the L1 notification, the terminal 20 may assume that the cell scheduled by the DCI of the SCell is the P(S)Cell. The terminal 20 may assume that the CIF of the DCI is 0 bits, or the terminal 20 may assume that the value pre-set by "cif-InschedulingCell".

[0091] Fig.18 This is a timing diagram for illustrating example (3) of cross-carrier scheduling in an embodiment of the present invention. Fig.18 , description and Fig.17 An example of actions related to cross-carrier scheduling is shown.

[0092] In step S21, the terminal 20 determines whether a dormant SCell is set by the base station 10. If a dormant SCell is set ("Yes" in S21), the process proceeds to step S22, and if a dormant SCell is not set ("Yes" in S22), the process proceeds to step S23.

[0093] In step S22 , the terminal 20 assumes that the PDSCH or PUSCH of the P(S)Cell is cross-carrier scheduled by the DCI set in the SCell in the sleep state.

[0094] On the other hand, in step S23, the terminal 20 assumes that schedulingCellInfo=own is set in the P(S)Cell, and assumes that the PDSCH or PUSCH of the P(S)Cell is scheduled by the DCI of the P(S)Cell.

[0095] The terminal 20 performs communication using the PDSCH or PUSCH of the scheduled P(S)Cell.

[0096] In addition, when cross-carrier scheduling is not set for the P(S)Cell set in the terminal 20 (for example, schedulingCellInfo=own is set for the P(S)Cell), the terminal 20 can assume that when the sleep signal is notified to the SCell set in the terminal 20, the PDCCH of the SCell is not received.

[0097] The embodiments of the present invention can be applied regardless of the distinction between uplink, downlink, transmission or reception. Uplink signals and channels, downlink signals and channels can be interchangeable. Uplink feedback information and downlink control signaling can be interchangeable.

[0098] The signaling from the base station 10 to the terminal 20 or from the terminal 20 to the base station 10 in the above-mentioned embodiments is not limited to being notified by an explicit method, but may also be notified by an implicit method. In addition, it may be uniquely specified in the specification without signaling notification.

[0099] The signaling from the base station 10 to the terminal 20 or the signaling from the terminal 20 to the base station 10 in the above-mentioned embodiment can be signaling of different layers such as RRC signaling, MAC-CE-based signaling or DCI-based signaling, or can be signaling based on broadcast information (MIB (Master Information Block), SIB (System Information Block)). In addition, for example, RRC signaling and DCI-based signaling can be combined, RRC signaling and MAC-CE-based signaling can be combined, and RRC signaling, MAC-CE-based signaling and DCI-based signaling can also be combined.

[0100] In the above-mentioned embodiment, although it is described as LTE and NR, it can also be applied between communication systems that are more future than NR (for example, called "6G"). For example, the above-mentioned embodiment can be applied to the coexistence technology of NR and 6G.

[0101] The above-described embodiments can be combined with each other. The features shown in the above-described embodiments can be combined with each other in various combinations. The combination is not limited to the specific combination disclosed.

[0102] According to the above-mentioned embodiment, the base station 10 and the terminal 20 can schedule the PDSCH or PUSCH of the P(S)Cell by the PDCCH of the SCell according to the state of the SCell.

[0103] That is, in a wireless communication system, when a plurality of RATs (Radio Access Technologies) are allowed to coexist in a single carrier, it is possible to alleviate the shortage of resources for transmitting and receiving control signals.

[0104] (Device Structure)

[0105] Next, the functional configuration examples of the base station 10 and the terminal 20 that perform the above-described processing and operation are described. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions in the embodiments.

[0106] <Base station 10>

[0107] Fig.19FIG. 1 is a diagram showing an example of a functional configuration of a base station 10 in an embodiment of the present invention. Fig.19 As shown, the base station 10 includes a transmission unit 110 , a reception unit 120 , a setting unit 130 , and a control unit 140 . Fig.19 The functional configuration shown is only an example, and any functional division and function unit name may be used as long as the operation according to the embodiment of the present invention can be performed.

[0108] The transmitting unit 110 includes a function of generating a signal to be sent to the terminal 20 side and wirelessly transmitting the signal. In addition, the transmitting unit 110 transmits network node messages to other network nodes. The receiving unit 120 includes a function of receiving various signals sent 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 network node messages from other network nodes.

[0109] The setting unit 130 stores preset setting information and various setting information transmitted to the terminal 20. The content of the setting information is, for example, information related to the setting of the DSS.

[0110] As described in the embodiment, the control unit 140 performs control related to the setting of the DSS. In addition, the control unit 140 controls communication based on the DSS. In addition, the control unit 140 performs control related to scheduling including cross-carrier scheduling. The functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0111] <Terminal 20>

[0112] Fig. 20 FIG. 2 is a diagram showing an example of the functional structure of the terminal 20 in the embodiment of the present invention. Fig. 20 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Fig. 20 The functional configuration shown is only an example, and any functional division and function unit name may be used as long as the operation according to the embodiment of the present invention can be performed.

[0113] The transmitting unit 210 generates a transmission signal according to 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. In addition, for example, as 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.

[0114] 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 pre-set setting information. The content of the setting information is, for example, information related to the setting of the DSS.

[0115] As described in the embodiment, the control unit 240 performs control related to the setting of the DSS. In addition, the control unit 240 controls communication based on the DSS. In addition, the control unit 240 performs control related to scheduling including cross-carrier scheduling. The functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0116] (Hardware Structure)

[0117] The block diagram used in the description of the above embodiment ( Fig.19 and Fig. 20 ) shows blocks in units 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 device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0118] Functions include, but are not limited to, judging, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. For example, a functional block (structural unit) that enables the sending function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0119] For example, the base station 10 , the terminal 20 , and the like in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.21 1 is a diagram showing an example of the hardware structure of a base station 10 and a terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may also be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0120] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware configuration of the base station 10 and the terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0121] Each function in the base station 10 and the terminal 20 is implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0122] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, a register, etc. For example, the control unit 140, the control unit 240, etc., may also be implemented by the processor 1001.

[0123] In addition, the processor 1001 reads a program (program code), a software module, or data 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 a program, a program that causes the computer to execute at least a part of the actions described in the above-mentioned embodiments is used. For example, Fig.19 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and executed in the processor 1001. In addition, for example, Fig. 20 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and running in the processor 1001. Regarding the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

[0124] The storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing the communication method involved in one embodiment of the present disclosure.

[0125] The auxiliary storage device 1003 is a computer-readable recording medium, and can be composed of at least one of an optical disk such as a CD-ROM (CompactDisc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (for example, a compressed disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The above-mentioned storage medium can be, for example, a database, a server, and other appropriate media that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0126] The communication device 1004 is hardware (transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may 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 duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, a transceiver antenna, an amplifier, a transceiver, a transmission path interface, etc. may also be implemented by the communication device 1004. The transceiver may also be physically or logically installed separately from the transmitter and the receiver.

[0127] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0128] In addition, the processor 1001 and the storage device 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured by a single bus or may be configured by different buses between devices.

[0129] In addition, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array), and a part or all of each functional block may be implemented by the hardware. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0130] (Summary of Implementation Methods)

[0131] As described above, according to an embodiment of the present invention, there is provided a terminal comprising: a receiving unit, which receives a signaling for putting a secondary cell into sleep mode and control information via the secondary cell; a control unit, which, when the receiving unit receives a signaling for activating the secondary cell, envisions scheduling a channel in a primary cell through the control information; and a communication unit, which uses the channel in the primary cell to perform transmission or reception.

[0132] According to the above structure, the base station 10 and the terminal 20 can schedule the PDSCH or PUSCH of the P(S)Cell through the PDCCH of the SCell according to the state of the SCell. That is, in a wireless communication system, when multiple RATs (Radio Access Technology) coexist in a single carrier, the shortage of resources for sending and receiving control signals can be alleviated.

[0133] The primary cell and the secondary cell may operate in the same carrier with different radio access technologies, i.e., RATs. According to this structure, the base station 10 and the terminal 20 can schedule the PDSCH or PUSCH of the P(S)Cell through the PDCCH of the SCell according to the state of the SCell, while allowing multiple RATs to coexist in a single carrier.

[0134] When the receiving unit does not receive the signaling for putting the secondary cell into sleep mode, the control unit may schedule the channel in the primary cell by the primary cell itself. According to this structure, the base station 10 and the terminal 20 can schedule the PDSCH or PUSCH of the P(S)Cell through the PDCCH of the P(S)Cell according to the state of the SCell.

[0135] The signaling for putting the secondary cell to sleep may be a layer 1 notification. According to this structure, the base station 10 and the terminal 20 can switch whether the PDCCH of the P(S)Cell schedules the PDSCH or PUSCH of the P(S)Cell or the PDCCH of the P(S)Cell schedules the PDSCH or PUSCH of the P(S)Cell according to the state migration of the SCell based on the L1 notification.

[0136] In addition, according to an embodiment of the present invention, a base station is provided, which has: a sending unit, which sends a signaling for putting a secondary cell into sleep mode and control information via the secondary cell; a control unit, which schedules a channel in a primary cell through the control information when the sending unit sends a signaling for activating the secondary cell; and a communication unit, which uses the channel in the primary cell to perform sending or receiving.

[0137] According to the above structure, the base station 10 and the terminal 20 can schedule the PDSCH or PUSCH of the P(S)Cell through the PDCCH of the SCell according to the state of the SCell. That is, in a wireless communication system, when multiple RATs (Radio Access Technology) coexist in a single carrier, the shortage of resources for sending and receiving control signals can be alleviated.

[0138] In addition, according to an embodiment of the present invention, a communication method is provided, wherein the following steps are performed by a terminal: a receiving step, receiving a signaling for putting a secondary cell to sleep, and control information via the secondary cell; a control step, in the case where a signaling for putting the secondary cell to sleep is received through the receiving step, assuming that a channel in a primary cell is scheduled through the control information; and a communication step, using the channel in the primary cell to perform sending or receiving.

[0139] According to the above structure, the base station 10 and the terminal 20 can schedule the PDSCH or PUSCH of the P(S)Cell according to the state of the SCell and the PDCCH of the SCell. That is, in a wireless communication system, when multiple RATs (Radio Access Technology) coexist in a single carrier, the shortage of resources for sending and receiving control signals can be alleviated.

[0140] (Supplementary Implementation Methods)

[0141] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, substitutions, replacements, etc. In order to promote the understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are only examples, and any appropriate value may also be used. The distinction between the items in the above description is not essential to the present invention, and the items recorded in more than two items can be used in combination as needed, and the items recorded in a certain item can be applied to the items recorded 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 the physical components. The actions of multiple functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple physical components. Regarding the processing process described in the embodiment, the order of processing can be swapped if there is no contradiction. In order to facilitate the description of the processing, the base station 10 and the terminal 20 are described using functional block diagrams, but such devices can also be implemented in hardware, software, or a combination thereof. The software that operates through the processor of the base station 10 according to the embodiment of the present invention and the software that operates through the processor of the terminal 20 according to the embodiment of the present invention may also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and any other appropriate storage medium.

[0142] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may 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, RRC signaling may also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0143] Each form / implementation described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, 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), systems using other appropriate systems, and next-generation systems extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may be applied.

[0144] The processing procedures, timings, flows, etc. of each form / implementation described in this specification may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0145] In this specification, a specific action that is assumed to be performed by the base station 10 may also be performed by its upper node depending on the situation. In a network composed of one or more network nodes having the base station 10, various actions performed to communicate with the terminal 20 can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station 10 is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0146] The information or signals described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), and can also be input or output via a plurality of network nodes.

[0147] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0148] The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0149] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0150] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0151] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0152] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0153] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0154] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0155] The names used for the above parameters are not limiting in any way. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Since various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, the various names assigned to these various channels and information elements are not limiting in any way.

[0156] In the present disclosure, the terms "base station (BS)", "wireless 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" and the like are used interchangeably. Sometimes, the base station is also referred to as macro cell, small cell, femto cell, pico cell and the like.

[0157] A base station can accommodate one or more (for example, 3) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0158] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0159] For mobile stations, those skilled in the art sometimes also use the following terms: 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 appropriate terms.

[0160] 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 be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0161] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, various forms / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, it may also be configured that the terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0162] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may also have the functions of the user terminal described above.

[0163] The terms "determining" and "determining" used in the present disclosure sometimes also include a variety of actions. "Judgment" and "determination" may include, for example, considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "judged" or "determined", etc. In addition, "judgment" and "determination" may include matters that have been received (for example, receiving information), transmitted (for example, sending information), input, output, accessed (for example, accessing data in memory) as matters that have been "judged" or "determined", etc. In addition, "judgment" and "determination" may include matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "judged" or "determined". That is, "judgment" and "decision" may include any action that is considered to be "judged" or "decided". In addition, "judgment (decision)" may be replaced by "assuming", "expecting", "considering", etc.

[0164] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination 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 combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used instead of "connection". In the context of the present disclosure, two elements may be considered to be "connected" or "coupled" 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, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (both visible and invisible) region may be used to "connect" or "couple" to each other.

[0165] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal according to the applied standard.

[0166] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0167] Any reference to an element using the designations "first," "second," etc. used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to a first element and a second element does not mean that only two elements can be taken or that the first element must precede the second element in any form.

[0168] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0169] When the terms "include", "including" and their variations are used in the present disclosure, these terms are intended to be inclusive like the term "comprising". Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0170] A radio frame may be composed of one or more frames in the time domain. In the time domain, one or more frames may be referred to as subframes. A subframe may further be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is independent of a numerology.

[0171] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may, for example, represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, and the like.

[0172] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0173] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as a PDSCH (or PUSCH) mapping type B.

[0174] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. A radio frame, a subframe, a time slot, a mini-time slot, and a symbol may be referred to by other corresponding names.

[0175] For example, one subframe may also be referred to as a transmission time interval (TTI), multiple consecutive subframes may also be referred to as a TTI, and one time slot or one mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing a TTI may not be referred to as a subframe, but may be referred to as a time slot, a mini time slot, or the like.

[0176] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each terminal 20 to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each terminal 20) in units of TTI. In addition, the definition of TTI is not limited to this.

[0177] TTI can be a transmission time unit for data packets (transport blocks), code blocks, code words, etc. after channel coding, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0178] In addition, when 1 time slot or 1 mini time slot is called TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can constitute the minimum time unit of scheduling. In addition, the number of time slots (number of mini time slots) constituting the minimum time unit of scheduling can be controlled.

[0179] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0180] In addition, for a long TTI (for example, a normal TTI, a subframe, etc.), it can be replaced with a TTI having a time length exceeding 1ms, and for a short TTI (for example, a shortened TTI, etc.), it can be replaced with a TTI length that is smaller than the long TTI (longTTI) and has a TTI length of more than 1ms.

[0181] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers contained in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers contained in an RB may also be determined according to the parameter set.

[0182] In addition, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may be composed of one or more resource blocks, respectively.

[0183] In addition, one or more RBs may be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like.

[0184] In addition, a resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

[0185] A bandwidth part (BWP) (which may be referred to as a partial bandwidth, etc.) may represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, the common RBs may be determined by the index of the RBs relative to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0186] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0187] At least one of the set BWPs may be active, and it is not assumed that the UE transmits or receives a predetermined signal / channel outside the activated BWP. In addition, "cell", "carrier" and the like in the present disclosure may be replaced with "BWP".

[0188] The above structures of radio frames, subframes, time slots, mini-time slots, and symbols are only 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, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be changed in various ways.

[0189] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in a plural form.

[0190] In the present disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0191] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched according to execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., notification of the scheduled information is not performed).

[0192] In addition, DCI in the present disclosure is an example of control information. The transmission unit 210 and the reception unit 220 are examples of communication units.

[0193] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0194] Description of symbols

[0195] 10: Base station;

[0196] 110: Sending department;

[0197] 120: receiving unit;

[0198] 130: Setting department;

[0199] 140: Control Department;

[0200] 20: Terminal;

[0201] 210: Sending department;

[0202] 220: receiving unit;

[0203] 230: Setting department;

[0204] 240: Control Department;

[0205] 1001: processor;

[0206] 1002: storage device;

[0207] 1003: auxiliary storage device;

[0208] 1004: Communication devices;

[0209] 1005: input device;

[0210] 1006: Output device.

Claims

1. A terminal comprising: a receiving unit configured to receive signaling including an information element related to cross-carrier scheduling, signaling for activating or deactivating a secondary cell, and control information via a primary cell; a control unit, wherein, when the information element related to cross-carrier scheduling is set to a value indicating that the primary cell is scheduled by the secondary cell and the receiving unit receives signaling for deactivating the secondary cell, the control unit assumes that a channel in the primary cell is scheduled by the control information; as well as A communication unit that performs transmission or reception using the channel in the primary cell.

2. A base station, comprising: a transmitting unit configured to transmit signaling including an information element related to cross-carrier scheduling, signaling for activating or deactivating a secondary cell, and control information via a primary cell; a control unit that, when the information element related to cross-carrier scheduling is set to a value indicating that the primary cell is scheduled by the secondary cell and the transmission unit transmits a signaling to deactivate the secondary cell, schedules a channel in the primary cell using the control information; and A communication unit that performs transmission or reception using the channel in the primary cell.

3. A terminal-based communication method, comprising the following steps: receiving signaling including information elements related to cross-carrier scheduling, signaling for activating or deactivating a secondary cell, and control information via a primary cell; When the information element related to cross-carrier scheduling is set to a value indicating that the primary cell is scheduled by the secondary cell and signaling for deactivating the secondary cell is received, it is assumed that a channel in the primary cell is scheduled by the control information; and Transmission or reception is performed using the channel in the primary cell.

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