Receiving device, transmitting device, receiving method and transmitting method

Abstract

The terminal (100) is provided with a wireless receiving unit (106) for receiving the MAC CE and the offset value (K MAC_ACTION and a control unit (110) that sets a time slot for starting an operation based on a MACCE control command based on an offset value.

Description

Technical Field

[0001] The present disclosure relates to a receiving device, a sending device, a receiving method, and a sending method. Background Art

[0002] In the standardization of 5G, new radio access technology (NR) is being discussed in 3GPP, and Release 15 (Rel.15) specifications of NR have been released.

[0003] In 5G NR, in Rel.15, the timing (hereinafter referred to as "MAC CE operation start timing") of starting an operation according to a control command sent in a MAC CE (MAC Control Element) is specified in the standard. MAC CE is information / signal processed (sent) in the Medium Access Control layer.

[0004] In addition, in NR, research is being conducted on: expansion to networks other than the ground (NTN: Non-Terrestrial Network), such as communications using satellites and / or high-altitude suspected satellites (HAPS: High-altitude platform station) (for example, Non-Patent Document 1).

[0005] Compared with the terrestrial cellular system, the communication distance between the base station and the terminal of the NTN system is long, so the propagation delay becomes larger.

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP, TR38.821 V16.0.0 "Solutions for NR to support non-terrestrial networks (NTN) (Release 16)" Summary of the invention

[0009] Problems to be solved by the invention

[0010] The MAC CE operation start timing of NTN has not yet been specified in the standard. In addition, since the propagation delay of NTN is large, it is not necessarily the most appropriate to set the MAC CE operation start timing of NTN to be the same as that of NR.

[0011] One aspect of the present disclosure contributes to providing a transmitting apparatus, a receiving apparatus, a transmitting method, and a receiving method capable of implementing appropriate MAC CE operation start timing control processing in an NTN system.

[0012] Solutions to Solve Problems

[0013] A receiving device according to one embodiment of the present disclosure includes: a receiving circuit that receives a MAC CE (MAC Control Element) and an offset value; and a control circuit that sets a time slot for starting an operation based on a control command of the MAC CE based on the offset value.

[0014] A transmitting device according to one embodiment of the present disclosure further comprises: a control circuit that sets a time slot for starting an operation based on a control command of a MACCE (MAC Control Element) based on an offset value; and a transmitting circuit that transmits the offset value and the MAC CE.

[0015] In a receiving method according to one embodiment of the present disclosure, a receiving device performs the following processing: receiving a MAC CE (MAC Control Element) and an offset value; and setting a time slot for starting an operation based on a control command of the MAC CE based on the offset value.

[0016] In a transmission method according to one aspect of the present disclosure, a transmitting device performs the following processing: based on an offset value, sets a time slot for starting an operation based on a control command of a MAC CE (MAC Control Element); and transmits the offset value and the MAC CE.

[0017] In addition, these general or specific methods can be implemented through systems, devices, methods, integrated circuits, computer programs, or recording media, or through any combination of systems, devices, methods, integrated circuits, computer programs and recording media.

[0018] Effects of the Invention

[0019] According to one aspect of the present disclosure, it is possible to implement appropriate MAC CE operation start timing control processing in an NTN system.

[0020] More advantages and effects of an embodiment of the present disclosure will be explained through the description and drawings. These advantages and / or effects are provided by several embodiments, and the features described in the description and drawings, but not necessarily all of them need to be provided in order to obtain one or more of the same features. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a diagram showing an example of timing adjustment based on terminal position information and satellite orbit information.

[0022] Figure 2 This is a diagram showing an example of transmission slot timing.

[0023] Figure 3 It is a diagram for explaining the study on the MAC CE operation start timing.

[0024] Figure 4 It is a diagram for explaining the study on the MAC CE operation start timing.

[0025] Figure 5 This is a block diagram showing a partial structure of a terminal according to the first embodiment.

[0026] Figure 6 This is a block diagram showing a partial structure of a base station according to the first embodiment.

[0027] Figure 7 This is a block diagram showing an example of the structure of a terminal involved in Implementation Example 1.

[0028] Figure 8 This is a block diagram showing an example of the structure of the base station involved in Implementation Example 1.

[0029] Fig. 9 This is a diagram showing a method 1 - 1 for setting a MAC CE operation time slot according to the first embodiment.

[0030] Fig.10 This is a diagram showing a method 1 - 2 for setting a MAC CE operation time slot according to the first embodiment.

[0031] Fig.11 This is a diagram showing a method 2-1 for setting a MAC CE operation time slot according to the second embodiment.

[0032] Fig.12 This is a diagram showing a method 2-2 for setting a MAC CE operation time slot according to the second embodiment.

[0033] Fig.13 This is a schematic diagram showing the functional separation between NG-RAN and 5GC.

[0034] Fig.14 It is a timing diagram showing the process of setting up / resetting the RRC connection.

[0035] Fig.15This is a schematic diagram showing the utilization scenarios of large-capacity, high-speed communications (eMBB: enhanced Mobile BroadBand), multi-connected machine-type communications (mMTC: massive Machine Type Communications), and ultra-reliable, ultra-low latency communications (URLLC: Ultra Reliable and Low Latency Communications).

[0036] Fig.16 is a block diagram representing an exemplary 5G system architecture for a non-roaming scenario. DETAILED DESCRIPTION

[0037] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0038] <Views of this disclosure>

[0039] The findings of the present disclosure are described below.

[0040] [MAC CE operation start timing in NR]

[0041] In a wireless communication system such as NR, the terminal (also called UE (User Equipment)) performs timing advance control to match the timing of the downlink of the base station (also called gNB). The terminal adjusts the transmission timing of the uplink signal based on the TA value contained in the TA command received from the base station, for example. In addition, the uplink channel includes the PUSCH (Physical Uplink Shared Channel) used in the transmission of data, the PUCCH (Physical Uplink Control Channel) used in the transmission of control information, and the PRACH (Physical Random Access Channel) used in the transmission of initial access. In addition, as an uplink signal, there is an SRS (Sounding Reference Signal). In addition, in the downlink channel, the PDSCH (Physical Downlink Shared Channel) used in the transmission of data and the PDCCH (Physical Downlink Control Channel) used in the transmission of control information are included.

[0042] In addition, in 5G NR, Rel.15 specifies the timing of transmission time slots.

[0043] In addition, in 5G NR, Rel.15 specifies control commands sent with MAC CE. In this control command, for example, as described in TS38.321V15.8.0, there are TCI states (beam) activation / deactivation, CSI-RS resource activation / deactivation, and SRS activation / deactivation. After confirming that the MAC CE is received in the terminal, the base station starts the MAC CE operation, that is, starts reflecting the control command sent with MAC CE.

[0044] In the Hybrid Automatic Repeat reQuest (HARQ) process, the terminal sends a response signal (hereinafter referred to as "HARQ-ACK") to the base station for the PDSCH. The response signal includes a positive acknowledgement (ACK) or a negative acknowledgement (NACK).

[0045] In 5G NR, Rel.15, for example, TS38.213 V15.8.0 stipulates that the MAC CE operation start timing is 3ms after the base station receives the HARQ-ACK for the PDSCH containing the MAC CE, that is, the timing at which the content of the control command of the notified MACCE is reflected. Since the subframe length is 1ms, the MAC CE operation start timing becomes 3N from the HARQ-ACK time slot. slot subframe After the time slot. In addition, N slot subframe It is the number of time slots per subframe, and differs depending on the subcarrier spacing, etc. Thus, after the base station receives HARQ-ACK (positive acknowledgement), that is, after confirming that the terminal has correctly received the MAC CE, it can start the MAC CE operation.

[0046] [Expansion to NTN]

[0047] In NR, the expansion to NTN using communications such as satellites and / or HAPS is being studied (for example, non-patent document 1).

[0048] In the NTN environment, the coverage area of ​​the satellite for the terminal on the ground or the terminal on the aircraft (for example, one or more cells) is formed by the beam from the satellite. In addition, the round-trip time of the radio wave propagation between the terminal and the satellite is determined by the altitude of the satellite (for example, a maximum of about 36,000 km) and / or the angle of observation from the terminal, that is, the positional relationship between the satellite and the terminal. In addition, when the base station is configured on the ground GW (Gateway), the round-trip time of the radio wave propagation between the base station and the terminal is the time after the round-trip time of the radio wave propagation between the satellite and the ground GW is added.

[0049] For example, a satellite forms a cell with a diameter of several hundred kilometers. The cell formed by a satellite is larger than the cell with a diameter of several kilometers formed by a base station of a ground GW. Therefore, the difference in propagation delay between the terminal and the satellite increases depending on the position of the terminal in the cell formed by the satellite.

[0050] For example, non-patent document 1 states that in NTN, the round trip time (RTT) of radio wave propagation between a base station and a terminal takes a maximum of about 540 ms. In addition, non-patent document 1 also states that a maximum delay difference of about 10 ms occurs due to the location of the terminal within a beam (within a cell). The so-called maximum delay difference means, for example, the difference between the round trip time between a terminal at a location farthest from a satellite and the satellite within a beam (within a cell) and the round trip time between a terminal at a location closest to a satellite and the satellite.

[0051] For example, NTN is studying the following: based on the estimated distance between the terminal and the satellite using the terminal's location information obtained from GNSS (Global Navigation Satellite System) such as GPS (Global Positioning System) and the satellite's location information obtained from the satellite's orbital information (satellite ephemeris), the propagation delay is calculated and the terminal autonomously performs timing adjustments.

[0052] Figure 1 This is a diagram showing an example of timing adjustment based on terminal location information (UE location information) and satellite orbit information (satellite ephemeris).

[0053] exist Figure 1 The example shows the downlink (DL) transmission time slot and uplink (UL) reception time slot of the base station (gNB), and the DL reception time slot and UL transmission time slot of the terminal (UE). In addition, Figure 1The horizontal axis represents the time axis.

[0054] exist Figure 1 In FIG. 1 , the propagation delay from the transmission timing of a certain signal in the base station to the reception timing of the signal in the terminal is represented by the propagation delay of the feeder link (Feeder link delay) and the propagation delay of the service link (Service link delay). Figure 1 As shown in FIG. 1 , the terminal uses the TA determined based on the terminal's location information and the satellite's orbit information to adjust the signal transmission timing. Figure 1 The TA in , for example, is equivalent to twice the propagation delay of the service link.

[0055] However, in the timing adjustment of the terminal based on the distance between the satellite and the terminal, the delay between the terminal and the satellite (i.e., the service link) can be corrected, but the delay between the base station configured in the ground GW (Gateway) and the satellite (i.e., the feeder link) cannot be corrected. In addition, in an environment where the satellite and the terminal are outside the line of sight (Non Line-of-Sight: NLOS), the propagation delay calculated using the location information is sometimes different from the actual propagation delay caused by reflection and / or diffraction in the non-line-of-sight environment. Therefore, if Figure 1 As shown, there is a possibility of generating downlink / uplink timing difference.

[0056] [Study on the Timing of MAC CE Operation Start in NTN]

[0057] Figure 2 FIG. 1 is a diagram showing an example of transmission slot timing. Figure 2 An example of the transmission slot timing in a terrestrial cell specified in Rel. 15 is shown in FIG. Figure 2 Left), and an example of transmit slot timing studied in NTN ( Figure 2 right).

[0058] exist Figure 2 The example shows the DL transmission slot and UL reception slot of the base station (gNB), and the DL reception slot and UL transmission slot of the terminal (UE). In addition, Figure 2 The horizontal axis represents the time axis.

[0059] In Rel.15, HARQ-ACK for PDSCH transmitted in time slot (n) is transmitted from the terminal and received by the base station in time slot (n+K1). K1 is a time slot correction value for HARQ-ACK. The time slot number is set based on the time slot timing in the base station.

[0060] In this regard, in NTN, in addition to studying the offset value (K offset ), the HARQ-ACK for the PDSCH transmitted in time slot (n) is also being studied so that the HARQ-ACK for the PDSCH transmitted in time slot (n+K1+K offset ) is received by the base station. In addition, K offset It is broadcast in each cell.

[0061] Figure 3 as well as Figure 4 FIG. 4 is a diagram illustrating a study on the timing of starting a MAC CE operation. Figure 3 as well as Figure 4 In the example, the DL transmission slot and UL reception slot of the base station (gNB), and the DL reception slot and UL transmission slot of the terminal (UE) are illustrated. In addition, Figure 3 as well as Figure 4 The horizontal axis represents the time axis. Figure 3 as well as Figure 4 In the slot subframe Recorded as X.

[0062] If we consider K offset , then for the time slot for sending the PDSCH containing the MAC CE (hereinafter referred to as the "PDSCH time slot") (n), the time slot for starting the MAC CE operation (hereinafter referred to as the "MAC CE operation time slot") becomes the time slot (n+K1+K offset +3N slot subframe )( Figure 3 In addition, since n'=n+K1+K offset Therefore, the MAC CE operation time slot for the time slot (n') in which the terminal sends HARQ-ACK and the base station receives it (hereinafter referred to as "HARQ-ACK time slot") becomes the time slot (n'+3N slot subframe ).

[0063] In the case of downlink / uplink timing difference, if the MAC CE operation time slot is set to the time slot (n+K1+K offset +3N slot subframe )( Figure 4 If the star-shaped time slot (A) is used, for the downlink, the MAC CE operation is started before receiving the HARQ-ACK.

[0064] In addition, if the downlink MAC CE operation time slot is set to the time slot immediately after the HARQ-ACK time slot ( Figure 4The terminal does not know the downlink / uplink timing difference and therefore cannot identify the correct MAC CE operation start timing.

[0065] The present inventors have focused on this problem and completed the present disclosure. In one aspect of the present disclosure, a technology for realizing appropriate MAC CE operation start timing control processing in an NTN system is described.

[0066] (Implementation Method 1)

[0067] [Overview of Communication System]

[0068] A communication system according to an embodiment of the present disclosure includes a terminal 100 and a base station 200. In the following description, the base station 200 (equivalent to a transmitting device) transmits a PDSCH including a MAC CE, and the terminal 100 (equivalent to a receiving device) receives the PDSCH. In addition, the terminal 100 transmits a HARQ-ACK for the PDSCH, and the base station 200 receives the HARQ-ACK. Then, after the terminal 100 receives the HARQ-ACK (positive acknowledgement), the MAC CE operation of the uplink is started. In addition, after the base station 200 receives the HARQ-ACK (positive acknowledgement), the MAC CE operation of the downlink is started.

[0069] Figure 5 1 is a block diagram showing a part of the structure of the terminal 100 according to the embodiment of the present disclosure. Figure 5 In the terminal 100 shown in the figure, the wireless receiving unit 106 receives the MAC CE and the offset value (K) from the base station 200. MAC_ACTION The control unit 110 sets a time slot for starting an operation based on a control command of the MAC CE based on the offset value.

[0070] Figure 6 2 is a block diagram showing a part of the structure of the base station 200 according to the embodiment of the present disclosure. Figure 6 In the base station 200 shown in FIG. 1 , the control unit 209 is based on the offset value (K MAC_ACTION The wireless transmission unit 208 transmits the MAC CE and the offset value to the terminal 100.

[0071] [Terminal structure]

[0072] Figure 71 is a block diagram showing an example of the configuration of the terminal 100 according to Embodiment 1. The terminal 100 includes a HARQ-ACK generating unit 101, a data generating unit 102, a data transmission processing unit 103, a wireless transmission unit 104, an antenna 105, a wireless reception unit 106, a data reception processing unit 107, a position information acquisition unit 108, and a timing control unit 109. The HARQ-ACK generating unit 101, the data generating unit 102, the data transmission processing unit 103, the data reception processing unit 107, the position information acquisition unit 108, and the timing control unit 109 may also be included in the control unit 110.

[0073] The HARQ-ACK generator 101 generates an acknowledgement signal (eg, ACK / NACK signal sequence) for the received PDSCH based on the error detection result input from the data reception processor 107 . The HARQ-ACK generator 101 outputs the acknowledgement signal to the data transmission processor 103 .

[0074] The data generation unit 102 generates an uplink data signal to be transmitted using the time and frequency resources for data transmission allocated from the base station 200, and the MCS (Modulation and Coding Scheme). The time and frequency resources and the MCS are notified by downlink control information (DCI or PDCCH) and by RRC signaling (Configured grant). The data generation unit 102 outputs the uplink data signal to the data transmission processing unit 103.

[0075] The data transmission processing unit 103 performs coding processing and modulation processing on each of the response signal output from the HARQ-ACK generation unit 101 and the uplink data signal output from the data generation unit 102 , and outputs the modulated baseband uplink signal to the wireless transmission unit 104 .

[0076] The wireless transmission unit 104 performs transmission processing such as D / A conversion and up conversion on the baseband uplink signal output from the data transmission processing unit 103, and transmits the uplink signal of the radio frequency obtained by the transmission processing to the base station 200 via the antenna 105. In addition, the wireless transmission unit 104 adjusts the transmission timing of the uplink signal according to the instruction of the timing control unit 109.

[0077] The wireless reception unit 106 performs reception processing such as down conversion and A / D conversion on the downlink signal of the wireless frequency received from the base station 200 via the antenna 105, and outputs the baseband downlink signal obtained by the reception processing to the data reception processing unit 107. In addition, the wireless reception unit 106 adjusts the reception timing of the downlink signal according to the instruction of the timing control unit 109.

[0078] The data receiving processing unit 107 demodulates and decodes the downlink signal output from the wireless receiving unit 106 to obtain downlink data and downlink control information. In addition, the data receiving processing unit 107 can also implement channel estimation and timing estimation based on the received reference signal. In addition, the data receiving processing unit 107 outputs the timing information (for example, common TA, dedicated TA, offset value) or MAC CE control information contained in the demodulated and decoded downlink control information to the timing control unit 109. The PDCCH of the downlink signal includes PDSCH allocation information, PUSCH allocation information, etc. In addition to user data, the PDSCH of the downlink signal also includes RRC control information, MAC CE control information, RACH response (msg2), TA command, etc.

[0079] The position information acquisition unit 108 acquires the position information (latitude, longitude, altitude, etc.) of the terminal 100 and the position information of the satellite of the communication partner through the GNSS function such as GPS, calculates the distance between the terminal 100 and the satellite, and outputs the calculated distance information indicating the distance to the timing control unit 109. In addition, the position information acquisition unit 108 can also obtain the position information of the satellite by pre-acquiring orbital information or time information called satellite ephemeris.

[0080] The timing control unit 109 determines the distance information output from the position information acquisition unit 108 and the radio wave propagation speed (about 3×10 8 m / s) to calculate the propagation delay time. Then, the timing control unit 109 instructs the wireless transmission unit 104 to transmit the uplink signal and instructs the wireless reception unit 106 to receive the downlink signal based on the propagation delay time, the cell-common timing adjustment value broadcasted from the base station, the TA value of the terminal 100 notified from the base station, and the like. In addition, the timing adjustment value may also be different for each channel (e.g., PUSCH, PUCCH, PRACH, SRS).

[0081] In addition, when MAC CE control information is input from data reception processing section 107, timing control section 109 controls each section to start MAC CE operation at a specific timing based on the offset value. Details of the method for setting the MAC CE operation start timing will be described later.

[0082] [Structure of base station]

[0083] Figure 8 1 is a block diagram showing an example of the structure of the base station 200 involved in this embodiment. The base station 200 includes an antenna 201, a wireless receiving unit 202, a data receiving processing unit 203, a timing control information generating unit 204, a MAC CE control unit 205, a data generating unit 206, a data transmission processing unit 207, and a wireless transmission unit 208. The data receiving processing unit 203, the timing control information generating unit 204, the MAC CE control unit 205, the data generating unit 206, and the data transmission processing unit 207 may also be included in the control unit 209.

[0084] The wireless reception unit 202 performs reception processing such as down-conversion and A / D conversion on a wireless frequency downlink signal received from the terminal 100 via the antenna 201 , and outputs a baseband uplink signal obtained by the reception processing to the data reception processing unit 203 .

[0085] The data reception processing unit 203 demodulates and decodes the uplink signal output from the wireless reception unit 202 to obtain downlink data and downlink control information. In addition, the data reception processing unit 203 performs channel estimation and timing estimation based on the received data signal, and outputs the estimated timing information indicating the timing to the timing control information generation unit 204. In addition, the data reception processing unit 203 outputs the received HARQ-ACK to the MAC CE control unit 205.

[0086] The timing control information generating unit 204 generates a TA command for the terminal 100 based on the timing estimated in the data reception processing unit 203. In addition, the timing control information generating unit 204 generates a timing adjustment value and an offset value (K offset , K MAC_ACTION The cell-common timing adjustment value and offset value are generated based on, for example, the size of the cell formed by the satellite beam or the length and delay of the feeder link. The timing control information generation unit 204 outputs the timing control information to the data transmission processing unit 207.

[0087] The MAC CE control unit 205 generates a MAC CE and outputs it to the data transmission processing unit 207. In addition, when a HARQ-ACK (positive acknowledgement) for a PDSCH including a MAC CE is input from the data reception processing unit 203, the MAC CE control unit 205 controls each unit so that a MAC CE operation is started at a specific timing based on an offset value. In addition, the details of the method for setting the MAC CE operation start timing will be described later.

[0088] The data generating unit 206 generates a downlink data signal including user data, system information, dedicated control information, etc. The data generating unit 206 outputs the generated downlink data signal to the data transmission processing unit 207 .

[0089] The data transmission processing unit 207 performs encoding and modulation processing on each of the timing control information output from the timing control information generation unit 204, the MAC CE output from the MAC CE control unit 205, and the downlink data signal output from the data generation unit 206, maps the modulated baseband downlink signal to the wireless resource and outputs it to the wireless transmission unit 208.

[0090] The wireless transmission unit 208 performs transmission processing such as D / A conversion and up-conversion on the baseband downlink signal output from the data transmission processing unit 207 , and transmits the downlink signal of the radio frequency obtained by the transmission processing to the terminal 100 via the antenna 201 .

[0091] [How to set the MAC CE operation start timing]

[0092] Next, the details of the method for setting the MAC CE operation start timing involved in this embodiment are described.

[0093] · Setting method 1-1

[0094] Fig. 9 FIG. 1 is a diagram showing method 1-1 for setting the MAC CE operation time slot. Fig. 9 The example shows the DL transmission slot and UL reception slot of the base station (gNB), and the DL reception slot and UL transmission slot of the terminal (UE). In addition, Fig. 9 The horizontal axis represents the time axis.

[0095] In this method, the uplink MAC CE operation time slot is used as a reference, based on the offset value (K MAC_ACTION1 ) to set the downlink MAC CE operation time slot.

[0096] The base station 200, for example, notifies the user of the offset value (K) after taking into account the downlink / uplink timing difference at the time of sending the MAC CE. MAC_ACTION1 ). In addition, K MAC_ACTION1 The downlink / uplink timing difference is rounded up in the time slot length unit. In addition, the base station 200 can send K in the target MAC CE. MAC_ACTION1 , K can also be sent by other MAC CE or RRC signaling, DCI, etc. MAC_ACTION1 .

[0097] The terminal 100 and the base station 200 set the uplink MAC CE operation time slot based on the HARQ-ACK time slot ( Fig. 9 The star-shaped time slot (A) of the uplink MAC CE operation time slot for the HARQ-ACK time slot (n') becomes the time slot (n'+3N slot subframe )(when X=3).

[0098] In addition, the terminal 100 and the base station 200 shift the uplink MAC CE operation time slot by an amount corresponding to the offset value (K MAC_ACTION1 ) is set as the downlink MAC CE operation time slot ( Fig. 9 Therefore, the downlink MAC CE operation time slot relative to the HARQ-ACK time slot (n') becomes the time slot (n'+3N slot subframe +K MAC_ACTION1 ).

[0099] In addition, the relationship between the PDSCH time slot (n) and the HARQ-ACK time slot (n') is: n' = n + K1 + K offset Therefore, the uplink MAC CE operation time slot for PDSCH time slot (n) becomes time slot (n+3N slot subframe +K1+K offset In addition, the downlink MAC CE operation time slot for PDSCH time slot (n) becomes time slot (n+3N). slot subframe +K1+K offset +K MAC_ACTION1 ). That is, the notified offset K MAC_ACTION1 It is only used in the definition of downlink MAC CE operation slot timing and is not used in the definition of uplink MAC CE operation slot timing.

[0100] According to this method, even when there is a downlink / uplink timing difference, the terminal 100 can accurately grasp the start timing (time slot) of the downlink MAC CE operation, so it is possible to prevent the inconsistency between the base station 200 and the terminal 100 regarding the parameters of transmission and reception. In addition, the base station 200 appropriately sets K MAC_ACTION1 In the base station 200, sufficient time can be obtained from receiving the HARQ-ACK (positive acknowledgement) until the MAC CE operation is started, so the MAC CE operation can be started after confirming that the MAC CE is correctly received in the terminal 100. In addition, in the base station 200, the downlink MAC CE operation start timing and the uplink MAC CE operation start timing can be set to the same or similar timing, so the control in the base station 200 can be simplified.

[0101] In addition, in this method, it is not necessary to MAC_ACTION1 The value may be set to match the downlink / uplink timing difference, for example, a value having a margin in consideration of the processing time in the base station 200 .

[0102] · Setting method 1-2

[0103] Fig.10 FIG. 1 is a diagram showing method 1-2 for setting the MAC CE operation time slot. Fig.10 In the example, the DL transmission slot and UL reception slot of the base station (gNB), and the DL reception slot and UL transmission slot of the terminal (UE) are illustrated. In addition, Fig.10 The horizontal axis represents the time axis.

[0104] In this method, the PDSCH time slot is used as a reference, and the offset value (K MAC_ACTION2 ) to set the downlink MAC CE operation time slot.

[0105] The base station 200 adds the correction value (K1) to the offset value corresponding to the downlink / uplink timing difference at the time of transmitting the MAC CE, and sets the value K1 as K. MAC_ACTION2 Make a notification.

[0106] The terminal 100 and the base station 200 set the uplink MAC CE operation time slot based on the PDSCH time slot ( Fig.10 The star-shaped time slot (A) of the PDSCH containing the MAC CE is the MACCE operation time slot of the uplink HARQ-ACK time slot (n') becoming the time slot (n'+3N slot subframe ), the uplink MAC CE operation time slot for PDSCH time slot (n) becomes time slot (n+3Nslot subframe +K offset +K1) (when X=3).

[0107] In addition, the terminal 100 and the base station 200 set the downlink MAC CE operation time slot ( Fig.10 The star-shaped time slot (B) of the downlink MAC CE operation time slot for PDSCH time slot (n) becomes time slot (n+3N slot subframe +K offset +K MAC_ACTION2 ). Therefore, the terminal 100 is able to set the MAC CE operation time slot of the downlink without considering the correction value (K1) of the HARQ-ACK timing.

[0108] According to this method, the terminal 100 can accurately grasp the start timing (time slot) of the downlink MAC CE operation, so it is possible to prevent the base station 200 and the terminal 100 from having inconsistencies in the parameters of transmission and reception. MAC_ACTION2 Sufficient time can be obtained from receiving HARQ-ACK (positive acknowledgement) in the base station 200 to starting the MAC CE operation, so the MAC CE operation can be started after confirming that the MAC CE is correctly received in the terminal 100. In addition, in the base station 200, since the downlink MAC CE operation start timing and the uplink MAC CE operation start timing can be set to the same or similar timing, the control in the base station 200 can be simplified.

[0109] In addition, since the MAC CE operation slot is defined based on the PDSCH slot in each of the uplink and the downlink, the terminal 100 can independently determine each MAC CE operation slot, so that the process can be simplified.

[0110] In addition, in this method, it is not necessary to MAC_ACTION2 The value may be set to match the added value of the downlink / uplink timing difference and the correction value ( K1 ), and may be set to a value having a margin in consideration of the processing time in the base station 200 , for example.

[0111] [Effect]

[0112] In the first embodiment described above, it is possible to prevent inconsistency between the base station 200 and the terminal 100 regarding the parameters of transmission and reception. In addition, the base station 200 can start the MAC CE operation after confirming that the MAC CE is correctly received in the terminal 100. Therefore, according to the first embodiment, it is possible to implement appropriate MAC CE operation start timing control processing in the NTN system.

[0113] (Implementation Method 2)

[0114] In this embodiment 2, a case where the base station starts downlink MACCE operation without waiting for reception of the HARQ-ACK slot is described. The configurations of the terminal and base station in this embodiment are the same as those of the terminal 100 and base station 200 described in embodiment 1, and thus description thereof is omitted.

[0115] [How to set the MAC CE operation start timing]

[0116] Next, the details of the method for setting the MAC CE operation start timing involved in this embodiment are described.

[0117] Setting method 2-1

[0118] Fig.11 This is a diagram showing method 2-1 for setting the MAC CE operation time slot. Fig.11 In the example, the DL transmission slot and UL reception slot of the base station (gNB), and the DL reception slot and UL transmission slot of the terminal (UE) are illustrated. In addition, Fig.11 The horizontal axis represents the time axis.

[0119] In this method, the PDSCH time slot is set as the reference, based on the offset value (K MAC_ACTION_DL ) sets the downlink MAC CE operation time slot, sets the HARQ-ACK time slot as the reference, and based on the offset value (K MAC_ACTION_UL )Set the MACCE operation time slot for the uplink.

[0120] The base station 200 notifies the uplink offset value (K MAC_ACTION_UL ) and the downlink offset value (K MAC_ACTION_DL ). In addition, K MAC_ACTION_UL and / or K MAC_ACTION_DL It can be a fixed value determined in the specification, or a value broadcasted by the base station in SIB or notified by terminal-specific signaling. MAC_ACTION_DL The object MAC CE may be sent, or the object MAC CE may be notified in advance by SIB or RRC signaling, or by DCI. MAC_ACTION_ULSimilarly, the uplink value depends on the processing capability of the terminal or the base station, so it does not need to be changed frequently, and therefore it is desired to be notified by SIB or RRC signaling.

[0121] The terminal 100 and the base station 200 set the uplink MAC CE operation time slot based on the HARQ-ACK time slot ( Fig.11 The uplink MAC CE operation time slot relative to the HARQ-ACK time slot (n') becomes the time slot (n'+K MAC_ACTION_UL ).

[0122] In addition, the terminal 100 and the base station 200 set the downlink MAC CE operation time slot ( Fig.11 The star-shaped time slot (B) of the downlink MAC CE operation time slot for PDSCH time slot (n) becomes time slot (n+K MAC_ACTION_DL ).

[0123] According to this method, the terminal 100 can accurately grasp the start timing (time slot) of the downlink MAC CE operation, so it is possible to prevent inconsistency between the base station 200 and the terminal 100 for the parameters of transmission and reception. In addition, since the downlink MAC CE operation can be started without waiting for the reception of the HARQ-ACK time slot, the time until the MAC CE operation is started can be shortened. In addition, in the terminal 100, since the start timing of the downlink and uplink MAC CE operations can be set to the same or similar timing, the timing adjustment in the terminal can be simplified.

[0124] In addition, in this method, the range of the offset value to be notified is as long as several time slots, so the offset value can be notified with several bits. Therefore, in this method, the number of bits used for notification can be reduced compared with the setting methods 1-1 and 1-2 described in the above embodiment 1.

[0125] In addition, in this method, there is a possibility that the base station 200 starts the MAC CE operation without confirming that the MAC CE has been correctly received in the terminal 100. However, as described below, this does not become a big problem depending on the operation of the NTN.

[0126] Generally speaking, in NTN, since the propagation delay is extremely large, if a transmission that relies on HARQ-based retransmission is performed, there is a concern that the delay time until the packet transmission is completed will become extremely long. Therefore, sometimes a robust MCS (i.e., an MCS with a low modulation multi-value number and coding rate) is used for transmission so that it can be received with a high probability (e.g., 99.99%) in the initial transmission. Therefore, even if the MAC CE operation of the downlink is started in the base station 200 without waiting for the reception of the HARQ-ACK, the probability that the terminal 100 receives the MAC CE is low, so the probability of inconsistency between the base station 200 and the terminal 100 becomes extremely low. In addition, even if an inconsistency occurs (i.e., the ACK is not received), since the base station 200 can identify the inconsistency at the moment when the ACK is not received, the inconsistency can be eliminated by retransmitting the signal sent from the MAC CE to the reception of its HARQ-ACK.

[0127] In addition, by MAC_ACTION_DL By setting a larger value, it is also possible to start the downlink MAC CE operation at a timing later than the HARQ-ACK reception timing in the base station 200. For example, when the PDSCH for transmitting the MAC CE is transmitted with a robust MCS (for example, transmitted together with data with strict delay requirements), since the probability of the PDSCH error is low, K is set to MAC_ACTION_DL Set to a smaller value to start MAC CE operation without waiting for HARQ-ACK. On the other hand, when the PDSCH used to send MAC CE is sent with the normal MCS (for example, together with data that allows delay), the probability of the PDSCH error becomes high, so K is set to a smaller value. MAC_ACTION_DL Set it to a larger value and wait for HARQ-ACK to be received before starting MAC CE operation. MAC_ACTION_DL The value of K can be used flexibly. MAC_ACTION_UL It may be set to a larger value when the base station starts MAC CE operation after waiting for HARQ-ACK reception, and may be set to a smaller value when this is not the case.

[0128] In addition, for example, when a MAC CE is sent in a HARQ process configured not to perform HARQ-ACK feedback, K MAC_ACTION_DL Set to a smaller value, start MAC CE operation before HARQ-ACK reception timing, and when MAC CE is sent in the HARQ process configured to perform HARQ-ACK feedback, start MAC CE operation after HARQ-ACK feedback. In this case, two K values ​​may be notified to the terminal in advance for these two types of HARQ processes.MAC_ACTION_DL In addition, multiple values ​​may be notified to the terminal in advance, and the base station specifies (notifies) the value to be used to the terminal each time the MAC CE is sent. MAC_ACTION_UL , can also be compared with K MAC_ACTION_DL Likewise, the two values ​​are notified to the terminal in advance.

[0129] · Setting method 2-2

[0130] Fig.12 FIG2 is a diagram showing method 2-2 for setting the MAC CE operation time slot. Fig.12 In the example, the DL transmission slot and UL reception slot of the base station (gNB), and the DL reception slot and UL transmission slot of the terminal (UE) are illustrated. In addition, Fig.12 The horizontal axis represents the time axis.

[0131] In this method, the HARQ-ACK transmission time slot of the terminal is set as the reference, based on the offset value (K MAC_ACTION )Set the MAC CE operation time slots for uplink and downlink.

[0132] The base station 200 notifies the offset value (K MAC_ACTION ). In addition, the base station 200 can send K in the MAC CE of the object. MAC_ACTION , K can also be sent in other MAC CE MAC_ACTION In addition, K MAC_ACTION It may be a fixed value determined in the specification, a value broadcasted from base station 200 to terminal 100 in SIB, or a value notified by terminal-specific signaling or DCI.

[0133] The terminal 100 and the base station 200 delay the HARQ-ACK time slot by a time equivalent to K MAC_ACTION The time slot is set as the MAC CE operation time slot for uplink and downlink ( Fig.12 The star-shaped time slots (A) and (B)). The uplink and downlink MAC CE operation time slots relative to the terminal's HARQ-ACK transmission time slot (n') become time slots (n'+K MAC_ACTION The downlink MAC CE operation time slot can also be combined with the uplink MAC CE operation time slot (n'+K MAC_ACTION ) is the same as or specified as the earliest time slot after it.

[0134] In addition, the base station 200 calculates the MAC CE operation start timing of the downlink in consideration of the managed uplink / downlink timing difference, etc. For example, the base station 200 calculates n+T DL-UL +K1+K MAC_ACTIONAs the MAC CE operation starts timing. In addition, T DL-UL Indicates the value of rounding the uplink / downlink timing difference to the time slot unit. N is the MAC CE transmission time slot.

[0135] According to this method, the terminal 100 can accurately grasp the start timing (time slot) of the downlink MAC CE operation, so it is possible to prevent inconsistencies in the parameters of transmission and reception between the base station 200 and the terminal 100. In addition, since the downlink MAC CE operation can be started without waiting for the reception of the HARQ-ACK time slot, the time until the MAC CE operation is started can be shortened. In addition, since only one parameter is used, the overhead spent on notification can be reduced. In addition, similar to the above-mentioned setting method 2-1, the downlink MAC CE operation can also be started at a timing later than the HARQ-ACK reception timing in the base station 200, and the downlink MAC CE operation can also be started at a timing before the HARQ-ACK reception timing, thereby shortening the time until the MAC CE operation is started. In addition, in the terminal 100, since the start timing of the MAC CE operation of the downlink and uplink can be set to the same or similar timing, the timing adjustment in the terminal 100 can be simplified.

[0136] [Effect]

[0137] In the second embodiment described above, it is possible to prevent inconsistency between the base station 200 and the terminal 100 regarding the parameters of transmission and reception. In addition, since the base station 200 can start the downlink MAC CE operation without waiting for the reception of the HARQ-ACK time slot, the time until the MAC CE operation is started can be shortened. Therefore, according to the second embodiment, it is possible to implement appropriate MAC CE operation start timing control processing in the NTN system.

[0138] In the above, each embodiment of the present disclosure has been described.

[0139] In addition, in each of the above-mentioned embodiments, the cell can be an area defined by the receiving power of SSB (Synchronization Signal / PBCH Block) or CSI-RS (Channel State Information-Reference Signal) sent by a base station (satellite), or an area defined by a geographical location.

[0140] In addition, in each of the above-mentioned embodiments, an example of an NTN environment (e.g., a satellite communication environment) is given for explanation, but the present disclosure is not limited thereto. The present disclosure may also be applied to other communication environments (e.g., a terrestrial cellular environment of LTE and / or NR).

[0141] In addition, in the above-mentioned embodiment, an example of using GNSS such as GPS (i.e., position detection using satellite signals) is described, but position detection based on ground cellular base stations, position detection using WiFi signals and / or Bluetooth (registered / deposited trademark) signals, position detection using acceleration sensors, etc., or position detection based on a combination thereof may also be performed. In addition, altitude information may also be obtained from a pressure sensor, etc.

[0142] In addition, a cell may be an area defined by the received power of SSB and / or CSI-RS transmitted by a base station (or satellite), or an area defined by a geographical location. In addition, the cell of the above embodiment may be replaced with a beam defined by SSB.

[0143] Satellite ephemeris information, which is information related to the position of the satellite, may be broadcasted through system information, etc., or may be stored in advance by the terminal (or base station). In addition, the terminal (or base station) may update the satellite ephemeris information when communication is possible. In addition, the terminal (or base station) may also use other information to determine the position of the satellite.

[0144] In addition, in the above-mentioned embodiment, the case where the location information can be used is described, but for a terminal without a GNSS function and / or a terminal that cannot obtain information related to the location of a satellite, the timing control based on the timing control information common to the cell broadcasted from the base station may be replaced by the timing control based on the location information. In this case, the base station may also send the timing control information corresponding to the propagation delay amount near the cell center.

[0145] The base station may also be referred to as a gNodeB or a gNB. In addition, the terminal may also be referred to as a UE.

[0146] The time slot may be replaced by a time slot, a mini time slot, a frame, a subframe, etc.

[0147] The response signal may be described as “ACK / NACK” in addition to being described as “HARQ-ACK”.

[0148] In the above embodiment, 3 ms after the HARQ-ACK time slot, that is, 3N slot subframeThe time slot after the MAC CE operation time slot is set, but it can also be reflected in a longer or shorter time than it, and can also be generalized as XN slot subframe After the time slot.

[0149] In the above embodiment, the MAC CE operation start timing is described as the timing for starting the operation according to the control command sent in the MAC CE, but it may be the timing for reflecting the status according to the control command sent in the MAC CE.

[0150] The uplink MAC CE in the above-mentioned implementation manner may also be in a command associated with the transmission or status of the uplink, for example, a timing advance command MAC CE, a SCell activation / deactivation MAC CE, a PUCCH spatial relation Activation / Deactivation MAC CE, SP CSI reporting on PUCCH Activation / Deactivation MAC CE, and a SP SRS Activation / Deactivation MAC CE.

[0151] Any one of SRS Pathloss Reference RS Update MAC CE (SRS Pathloss Reference RS Update MAC CE), PUSCH Pathloss Reference RS Update MAC CE (PUSCH Pathloss Reference RS Update MAC CE), and Serving Cell Set based SRS Spatial Relation Indication MAC CE. In addition, it may also include SCell activation / deactivation MAC CE related to the uplink SCell.

[0152] The downlink MAC CE in the above-mentioned implementation manner may also be in a command associated with the transmission or status of the downlink, for example, any one of SCell activation / deactivation MAC CE (SCell Activation / Deactivation MAC CE), SPZP CSI-RS resource set activation / deactivation MAC CE (SP ZP CSI-RS Resource Set Activation / Deactivation MAC CE), TCI States Activation / Deactivation for UE-specific PDSCH MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE), Aperiodic CSI Trigger State Sub-selection MAC CE, SP CSI-RS / CSI-IM Resource Set Activation / Deactivation MAC CE (SP CSI-RS / CSI-IM Resource Set Activation / Deactivation MAC CE), and DRX Command MAC CE (DRX Command MAC CE).

[0153] Alternatively, you can follow the command, for example by changing the value of X or K MAC_ACTION The value of MAC CE can be used to change the MAC CE operation timing. The operation can be performed at an appropriate timing according to the content or priority of the command.

[0154] In implementation mode 1, for the uplink MAC CE operation start timing, if the HARQ-ACK timing for the PDSCH containing the MAC CE is set as the reference (ie, for the HARQ-ACK time slot n', the MAC CE operation start timing is time slot (n'+3N slot subframe )), the timing becomes the same as NR Rel.15. Therefore, as an offset of the MAC CE operation start timing for controlling the downlink, K MAC_ACTION In addition, K may be notified as the same or different MAC CE in the same PDSCH as the downlink MAC CE. MAC_ACTION .

[0155] In the above embodiment, the offset value K indicating the MAC CE reflection timing is notified. MAC_ACTION (Including K MAC_ACTION1 , K MAC_ACTION2The offset value for correcting the round-trip delay may be the offset value used in the timing advance (TimingAdvance), or the K value described above. offset .

[0156] Indicates the offset value K of the MAC CE reflection timing MAC_ACTION It can be broadcast as a value common to a cell or beam through SIB, etc., or it can be notified through dedicated RRC signaling. In addition, it can be notified as MAC CE or through DCI (or PDCCH).

[0157] In the case of GEO (geostationary satellite), the downlink / uplink timing difference becomes a fixed value (or a value that does not change substantially), and in the case of LEO (non-geostationary satellite), the downlink / uplink timing difference changes with the movement of the satellite. Therefore, SIB, RRC signaling, and MAC CE may be used in combination, so that in the case of GEO, the SIB or RRC signaling is used to notify, and in the case of LEO, the K calculated in the base station is notified through MAC CE at the time of sending MAC CE. MAC_ACTION The value notified by MAC CE may also be set to the difference between the value notified by SIB or RRC signaling. In this case, the number of notification bits in MAC CE can be reduced.

[0158] In the above-mentioned implementation manner, the MAC CE operation start timing can be switched for each terminal or application scenario, or the MAC CE operation start timing to be used can be specified through the SIB. In addition, different MAC CE operation timings are set in the HARQ process with HARQ-feedback enabled and the HARQ process with HARQ-feedback disabled. For example, when a MAC CE is sent in a HARQ process without HARQ-ACK feedback, MAC CE reflection timing setting method 3 or 4 (implementation method 2) can be used to reflect MAC CE before HARQ-ACK timing, and when a MAC CE is sent in a HARQ process with HARQ-ACK feedback, MAC CE reflection timing setting method 1 or 2 (implementation method 1) can be used to reflect MAC CE after HARQ-ACK feedback.

[0159] HARQ-ACK may include ACK, NACK, and DTX (non-transmission). The terminal reflects MAC CE at a specific timing when ACK is sent, but does not reflect MAC CE when NACK is sent for PDSCH containing MAC CE or when DTX is in progress, that is, when PDSCH containing MAC CE cannot be correctly decoded or when PDSCH allocation is not noticed (PDCCH is not received). In addition, when NACK is also received in the base station, or when neither ACK nor NACK is received, MAC CE is not reflected.

[0160] In the above-mentioned embodiment, for example, the terminal reflects after 3 (or X) time slots from the HARQ-ACK transmission timing for the PDSCH containing the MAC CE. On the other hand, in the case of a HARQ process in which HARQ-feedback is deactivated, HARQ-ACK transmission is not performed. In this case, although it is not actually transmitted, it may be reflected after 3 time slots from the timing assumed as HARQ-ACK transmission (for example, a hypothetical HARQ-ACK timing). In addition, although the transmission timing of HARQ-ACK is determined by the value of K1 (offset value from the PDSCH time slot) notified by DCI when the PDSCH is scheduled, it is also possible to determine the hypothetical HARQ-ACK timing using the notified K1 value although HARQ-ACK is not actually transmitted. In addition, since the value of K1 is not required when HARQ-feedback is deactivated, there is a possibility that the K1 value is not notified through DCI and is treated as a field used for other purposes or as an invalid field. In this case, the minimum value or the maximum value may be used from the values ​​configured as candidates for the K1 value. In addition, it is possible to set which value to use as the K1 value when HARQ-feedback is deactivated, or to determine the default value as a specification. Thus, the operation timing of the MAC CE is uniquely specified, so that identification can be matched between the base station and the terminal.

[0161] In the above implementation, K can also be set without generating a downlink / uplink timing difference. MAC_ACTION Set it to zero and notify the terminal. In addition, K can also be set only in the case of downlink / uplink timing difference. MAC_ACTION In this case, K is not used if no downlink / uplink timing difference is generated. MAC_ACTIONIn addition, the timing offset information common to the cell or beam may be notified to the terminal to perform timing control (such as timing advance) so that the terminal does not generate a downlink / uplink timing difference. The K MAC_ACTION .

[0162] In addition, the description of "···unit" in the above-mentioned embodiments may be replaced by other descriptions such as "···circuitry", "···device", "···unit", or "···module".

[0163] <5G NR system architecture and protocol stack>

[0164] 3GPP is continuing work to implement the next version of fifth generation mobile technology (also referred to simply as "5G"), including the development of new radio access technology (NR) operating in the frequency range up to 100 GHz. The first version of the 5G standard was completed in late 2017, which enabled the transition to trial production of terminals (e.g., smartphones) compliant with the 5G NR standard and commercial deployment.

[0165] For example, the system architecture as a whole envisions a NG-RAN (Next Generation Radio Access Network) including gNBs. The gNB provides the UE-side termination of the protocols of the user plane (SDAP (Service Data Adaptation Protocol) / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY (Physical Layer)) and control plane (RRC) of the NG radio access. The gNBs are connected to each other through an Xn interface. In addition, the gNB is connected to the NGC (Next Generation Core) through a Next Generation (NG) interface, more specifically, to the AMF (Access and Mobility Management Function) (e.g., a specific core entity that executes the AMF) through an NG-C interface, and in addition, to the UPF (User Plane Function) (e.g., a specific core entity that executes the UPF) through an NG-U interface. Fig.16Represents the NG-RAN architecture (for example, refer to 3GPP TS 38.300v15.6.0, section 4).

[0166] The protocol stack of the user plane of NR (e.g., refer to 3GPP TS 38.300, Section 4.4.1) includes, for gNB, the PDCP (Packet Data Convergence Protocol (see Section 6.4 of TS 38.300)) sublayer, the RLC (Radio Link Control (see Section 6.3 of TS 38.300)) sublayer, and the MAC (Media Access Control (see Section 6.2 of TS 38.300)) sublayer, which are terminated on the network side in the gNB. In addition, a sublayer (SDAP: Service Data Adaptation Protocol) of the new access stratum (AS: Access Stratum) has been introduced on PDCP (e.g., refer to Section 6.5 of 3GPP TS 38.300). In addition, a protocol stack of the control plane is defined for NR (e.g., refer to TS 38.300, Section 4.4.2). An overview of the functions of Layer 2 is described in Section 6 of TS 38.300. The functions of the PDCP sublayer, RLC sublayer and MAC sublayer are listed in Sections 6.4, 6.3 and 6.2 of TS 38.300 respectively. The functions of the RRC layer are listed in Section 7 of TS 38.300.

[0167] For example, the media access control layer handles multiplexing of logical channels, and scheduling including processing of various parameter sets and various functions associated with the scheduling.

[0168] For example, the physical layer (PHY) is responsible for coding, PHY HARQ (Physical Layer Hybrid Automatic Repeat Request) processing, modulation, multi-antenna processing, and mapping signals to appropriate physical time-frequency resources. In addition, the physical layer handles the mapping of transport channels to physical channels. The physical layer provides services to the MAC layer in the form of transport channels. A physical channel corresponds to a set of time-frequency resources used to send a specific transport channel, and each transport channel is mapped to a corresponding physical channel. For example, in the physical channel, the uplink physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), PUCCH (Physical Uplink Control Channel), and the downlink physical channels include PDSCH (Physical Downlink Shared Channel), PDCCH (Physical Downlink Control Channel), and PBCH (Physical Broadcast Channel).

[0169] The use cases / extended scenarios of NR may include enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine type communications (mMTC), which have various requirements in terms of data rate, latency, and coverage. For example, eMBB is expected to support peak data rates (20 Gbps in the downlink and 10 Gbps in the uplink) and effective (user-experienced) data rates that are about 3 times the data rates provided by IMT-Advanced (International Mobile Telecommunications-Advanced). On the other hand, in the case of URLLC, more stringent requirements are proposed for ultra-low latency (the latency of the user plane is 0.5 ms in UL and DL, respectively) and high reliability (within 1 ms, 1-10-5). Finally, in mMTC, preferably, a high connection density is required (1,000,000 devices / km in an urban environment). 2 ), wide coverage in harsh environments and extremely long battery life (15 years) for a cheap device.

[0170] Therefore, sometimes the parameter set of OFDM that is suitable for one use case (for example, subcarrier spacing (SCS: SubCarrier Spacing), OFDM codeword length, cyclic prefix (CP: Cyclic Prefix) length, number of codewords per scheduling interval) is invalid for other use cases. For example, in low-latency services, it is preferred that the codeword length is shorter than that of mMTC services (therefore, the subcarrier spacing is larger) and / or the number of codewords per scheduling interval (also called "TTI (Transmission Time Interval)") is small. Moreover, in extended scenarios where the delay spread of the channel is large, it is preferred that the CP length is longer than that of scenarios where the delay spread is short. The subcarrier spacing can also be optimized according to the situation to maintain the same CP overhead. The value of the subcarrier spacing supported by NR can be more than one. Correspondingly, subcarrier spacings of 15kHz, 30kHz, 60kHz... are currently considered. The codeword length Tu and the subcarrier spacing Δf are directly related according to the formula Δf=1 / Tu. Similar to the LTE system, the term “resource element” can be used to represent the minimum resource unit composed of one subcarrier with a length of one OFDM / SC-FDMA (Single-Carrier Frequency Division Multiple Access) symbol.

[0171] In the new wireless system 5G-NR, for each parameter set and each carrier, a resource grid of subcarriers and OFDM symbols is defined in the uplink and downlink. Each element of the resource grid is called a "resource element", which is determined based on the frequency index in the frequency domain and the symbol position in the time domain (refer to 3GPP TS38.211v15.6.0).

[0172] <Functional separation between NG-RAN and 5GC in 5G NR>

[0173] Fig.13 Indicates the functional separation between NG-RAN and 5GC. The logical node of NG-RAN is gNB or ng-eNB. 5GC has logical nodes AMF, UPF and SMF (Session Management Function).

[0174] For example, gNB and ng-eNB host the following main functions:

[0175] - Radio Bearer Control, Radio Admission Control, Connection Mobility Control, and Radio Resource Management functions such as dynamically allocating (scheduling) resources to UEs in both uplink and downlink;

[0176] -IP (Internet Protocol) header compression, encryption and integrity protection of data;

[0177] - Selection of the AMF when attaching the UE in case the routing towards the AMF cannot be decided based on the information provided by the UE;

[0178] - Routing of user plane data towards UPF;

[0179] - Routing of control plane information towards the AMF;

[0180] -Set up and disconnect connections;

[0181] - Scheduling and sending of paging messages;

[0182] - Scheduling and sending of system broadcast information (AMF or operation, admission, maintenance function (OAM) as the originator);

[0183] - Settings for measurements and measurement reports for mobility and scheduling;

[0184] - Packet marking of the transmission class in uplink;

[0185] -Session management;

[0186] - Network slicing support;

[0187] - Management of QoS (Quality of Service) flows and mapping to data radio bearers;

[0188] - Support of UE in RRC_INACTIVE state;

[0189] -NAS (Non Access Stratum) message distribution function;

[0190] -Sharing of wireless access networks;

[0191] -Dual connection;

[0192] -Close collaboration between NR and E-UTRA (Evolved Universal Terrestrial Radio Access).

[0193] The access and mobility management function (AMF) hosts the following main functions:

[0194] - Functionality to terminate non-access stratum (NAS) signaling;

[0195] -Security of NAS signaling;

[0196] - Security control of the access layer (AS);

[0197] -Core Network (CN) inter-node signaling for mobility between 3GPP access networks;

[0198] - the possibility of reaching the UE in idle mode (including the control and execution of paging retransmission);

[0199] - Management of the registration area;

[0200] -Support for intra-system and inter-system mobility;

[0201] -Access authentication;

[0202] - Access permission including roaming permission check;

[0203] -Mobility management control (subscription and policy);

[0204] - Network slicing support;

[0205] - Selection of Session Management Function (SMF).

[0206] In addition, the User Plane Function (UPF) hosts the following main functions:

[0207] - Anchor point for intra-RAT (Radio Access Technology) mobility / inter-RAT (Inter-RAT) mobility (where applicable);

[0208] - External PDU (Protocol Data Unit) session point for interconnection with data networks;

[0209] -Packet routing and forwarding;

[0210] -Policy rule enforcement for packet inspection and user plane;

[0211] - Business usage reporting;

[0212] - Uplink classifier for supporting routing of traffic towards data networks;

[0213] - Branching Point for supporting multi-homed PDU session;

[0214] - QoS processing for the user plane (e.g., packet filtering, gating, UL / DL rate enforcement);

[0215] - Verification of uplink services (mapping of SDF (Service Data Flow) to QoS flows);

[0216] - Downlink packet buffering and downlink data notification triggering function.

[0217] Finally, the Session Management Function (SMF) hosts the following main functions:

[0218] -Session management;

[0219] -Allocation and management of UE IP addresses;

[0220] - UPF selection and control;

[0221] - Traffic steering configuration function in the user plane function (UPF) for directing traffic to the appropriate destination;

[0222] - Enforcement of policies and QoS in the control part;

[0223] -Notification of downlink data.

[0224] <RRC connection setup and re-setup process>

[0225] Fig.14 Represents several interactions between the UE, gNB and AMF (5GC entity) when the NAS part of the UE transitions from RRC_IDLE (RRC Idle) to RRC_CONNECTED (RRC Connected) (refer to TS 38.300v15.6.0).

[0226] RRC is a high-layer signaling (protocol) used for the configuration of UE and gNB. Through this transition, AMF prepares UE context data (which includes, for example, PDU session context, security keys, UE radio capabilities (UE Radio Capability), UE security capabilities (UE Security Capabilities), etc.), and sends it to gNB together with the initial context setup request (INITIAL CONTEXTSETUP REQUEST). Next, the gNB activates AS security together with the UE. The gNB sends a Security Mode Command (SecurityModeCommand) message to the UE, and the UE responds to the gNB with a Security Mode Complete (SecurityModeComplete) message to activate AS security. Then, the gNB sends an RRC Reconfiguration (RRCReconfiguration) message to the UE, and the gNB receives an RRC Reconfiguration Complete (RRCReconfigurationComplete) from the UE for the RRC Reconfiguration message, thereby reconfiguring the Signaling Radio Bearer 2 (SRB2) and the Data Radio Bearer (DRB). For signaling-only connections, since SRB2 and DRB are not configured, the steps related to RRC reconfiguration can be omitted. Finally, the gNB notifies the AMF of the completion of the setup process using the INITIAL CONTEXT SETUP RESPONSE.

[0227] Therefore, the present disclosure provides the following fifth generation core network (5GC) entity (e.g., AMF, SMF, etc.), which includes: a control circuit, which, when in action, establishes a next generation (Next Generation, NG) connection with a gNodeB (gNodeB); and a sending unit, which, when in action, sends an initial context setting message to the gNodeB via the NG connection to set a signaling radio bearer between the gNodeB and the user equipment (UE: User Equipment). Specifically, the gNodeB sends a radio resource control (RRC) signaling containing a resource allocation setting information element (IE: Information Element) to the UE via the signaling radio bearer. Then, the UE sends in the uplink or receives in the downlink based on the resource allocation setting.

[0228] <Application scenarios of IMT after 2020>

[0229] Fig.15 Indicates several use cases for 5G NR. In the 3rd generation partnership project new radio (3GPP NR), three use cases supporting a wide range of services and applications conceived through IMT-2020 have been studied. The planning and development of the first phase of specifications for large-capacity high-speed communications (eMBB: enhanced mobile broadband) has been completed. In current and future work, in addition to gradually expanding support for eMBB, it also includes standardization for ultra-reliable and low-latency communications (URLLC: ultra-reliable and low-latency communications) and multiple simultaneous machine-type communications (mMTC: massive machine-type communications). Fig.15 Several examples of conceptual utilization scenarios of IMT after 2020 are shown (for example, refer to Figure 21 of ITU-R M.2083).

[0230] The use cases of URLLC have strict requirements related to performance such as throughput, latency (delay) and availability. The use cases of URLLC are conceived as an element technology for realizing future applications such as wireless control of industrial production processes or manufacturing processes, remote medical surgery, automation of power transmission and distribution in smart grids, and traffic safety. The ultra-high reliability of URLLC is supported by determining technologies that meet the requirements set by TR38.913. In version 15 of NR URLLC, as an important requirement, the target user plane latency is 0.5ms in UL (uplink) and 0.5ms in DL (downlink). The overall URLLC requirement for a packet transmission is that the block error rate (BLER) is 1E-5 for a packet size of 32 bytes when the user plane latency is 1ms.

[0231] Considering the physical layer, a number of possible approaches can be used to improve reliability. Current scope for improving reliability includes defining additional CQI (Channel Quality Indicator) tables for URLLC, more compact DCI formats, repetition of PDCCH, etc. However, as NR (an important prerequisite for NR URLLC) becomes more stable and further developed, the scope can be expanded to achieve ultra-high reliability. Specific use cases for NR URLLC in Release 15 include Augmented Reality / Virtual Reality (AR / VR), e-Health, e-Safety and critical applications.

[0232] In addition, the technical enhancements of the NR URLLC target are aimed at improving latency and increasing reliability. Technical enhancements for improving latency include configurable parameter sets, non-slot-based scheduling with flexible mapping, unauthorized (configured authorized) uplink, slot-level repetition in the data channel, and preemption in the downlink. Preemption means stopping the transmission of allocated resources and using the allocated resources for other transmissions that are requested later and meet the necessary conditions of lower latency / higher priority. Therefore, the allowed transmission will be replaced by the subsequent transmission. Preemption can be applied regardless of the specific service type. For example, the transmission of service type A (URLLC) can also be replaced by the transmission of service type B (eMBB, etc.). Technical enhancements related to reliability improvement include dedicated CQI / MCS tables for target BLER of 1E-5.

[0233] The use case of mMTC (Massive Machine Type Communications) is characterized by the fact that there are typically a very large number of connected devices that send relatively small amounts of data that are not susceptible to latency. The devices are required to be low priced and have very long battery life. From the NR point of view, utilizing very narrow bandwidth portions is one solution that can save power and extend the battery life of the UE.

[0234] As mentioned above, it is predicted that the room for reliability improvement in NR will be further expanded. It is one of the important requirements for all situations. For example, the important requirement related to URLLC and mMTC is high reliability or ultra-high reliability. From the wireless point of view and the network point of view, reliability can be improved in several mechanisms. In general, there are two to three important areas that may help improve reliability. These areas include compact control channel information, repetition of data channels / control channels, and diversity related to frequency domain, time domain and / or space domain. These areas can be used universally to improve reliability regardless of the specific communication scenario.

[0235] For NRURLLC, further use cases with stricter requirements are envisioned, such as factory automation, transportation, and power transmission. The strict requirements are high reliability (up to 10-6 reliability), high availability, packet size up to 256 bytes, time synchronization up to a few microseconds (μs) (the value can be set to 1μs or a few microseconds depending on the frequency range and short latency of around 0.5ms to 1ms (for example, 0.5ms latency in the user plane set as the target) for the use case).

[0236] Moreover, regarding NR URLLC, from the perspective of the physical layer, there may be several technical enhancements. These technical enhancements include the enhancement of PDCCH (Physical Downlink Control Channel) related to compact DCI, repetition of PDCCH, and increased monitoring of PDCCH. In addition, the enhancement of UCI (Uplink Control Information) is related to the enhancement of enhanced HARQ (Hybrid Automatic Repeat Request) and CSI feedback. In addition, there may be enhancement of PUSCH related to frequency hopping at the mini-slot level and enhancement of retransmission / repetition. The term "mini-slot" refers to a transmission time interval (TTI) that contains fewer symbols than a slot (a slot has 14 symbols).

[0237] <QoS Control>

[0238] The 5G QoS (Quality of Service) model is based on QoS flows, supporting both QoS flows that require guaranteed bit rate (GBR: Guaranteed Bit Rate QoS flows) and QoS flows that do not require guaranteed bit rate (non-GBR QoS flows). Therefore, at the NAS level, QoS flows are the most fine-grained QoS divisions in a PDU session. QoS flows are determined within a PDU session based on the QoS flow ID (QFI: QoS Flow ID) transmitted by the encapsulation header via the NG-U interface.

[0239] For each UE, 5GC establishes one or more PDU sessions. For each UE, in conjunction with the PDU session, NG-RAN, for example, as described in the previous reference Fig.14 As described above, at least one data radio bearer (DRB) is established. In addition, the DRB added to the QoS flow of the PDU session can also be set later (when to set it depends on NG-RAN). NG-RAN maps packets belonging to various PDU sessions to various DRBs. NAS-level packet filters in UE and 5GC are used to associate UL packets and DL packets with QoS flows, and AS-level mapping rules in UE and NG-RAN associate UL QoS flows and DL QoS flows with DRBs.

[0240] Fig.16 Represents the non-roaming reference architecture of 5G NR (see TS 23.501v16.1.0, section 4.23). Application Function (AF) (e.g., host Fig.15 The 3GPP core network (an external application server for the 5G service illustrated) interacts with the 3GPP core network to provide services. For example, accessing the Network Exposure Function (NEF) to support applications that affect the routing of services, or interacting with the policy framework for policy control (for example, QoS control) (refer to the Policy Control Function (PCF)). Based on the operator's deployment, the operator considers that trusted application functions can interact directly with the associated network function (Network Function). Application functions that are not allowed by the operator to directly access the network function interact with the associated network function via NEF using an open framework to the outside.

[0241] Fig.16It also represents further functional units of the 5G architecture, namely, Network Slice Selection Function (NSSF), Network Repository Function (NRF), Unified Data Management (UDM), Authentication Server Function (AUSF), Access and Mobility Management Function (AMF), Session Management Function (SMF) and Data Network (DN: Data Network, such as services provided by operators, Internet access or services provided by third parties). All or part of the core network functions and application services can also be deployed and operated in a cloud computing environment.

[0242] Therefore, the present disclosure provides the following application server (for example, AF of 5G architecture), which includes: a sending unit, which, in order to establish a PDU session of a wireless bearer between a g-node B and a UE corresponding to the QoS requirements, sends a request for QoS requirements for at least one of URLLC service, eMMB service and mMTC service to at least one function of the 5GC (for example, NEF, AMF, SMF, PCF, UPF, etc.); and a control circuit, which, in action, uses the established PDU session for service.

[0243] The present disclosure can be implemented by software, hardware or software in cooperation with hardware. Each functional block used in the description of the above-mentioned embodiments is partially or entirely implemented as an LSI (Large Scale Integration) as an integrated circuit, and each process described in the above-mentioned embodiments may also be partially or entirely controlled by an LSI or a combination of LSIs. LSI may be composed of individual chips, or may be composed of one chip in a manner that includes part or all of the functional blocks. LSI may also include input and output of data. LSI may also be referred to as "IC (Integrated Circuit)", "System LSI", "Super LSI", "Ultra LSI" depending on the degree of integration.

[0244] The method of integrated circuitization is not limited to LSI, and can also be implemented by a dedicated circuit, a general-purpose processor or a dedicated processor. In addition, an FPGA (Field Programmable Gate Array) that can be programmed after LSI manufacturing, or a reconfigurable processor (Reconfigurable Processor) that can reconfigure the connection or setting of the circuit block inside the LSI can also be used. The present disclosure can also be implemented as digital processing or analog processing.

[0245] Furthermore, if integrated circuit technology that replaces LSI emerges as semiconductor technology advances or other technologies are derived, it is of course possible to use this technology to achieve integration of functional blocks. There is also the possibility of applying biotechnology, etc.

[0246] The present disclosure can be implemented in all kinds of devices, equipment, and systems (collectively referred to as "communication devices") with communication functions. The communication device may also include a wireless transceiver and a processing / control circuit. The wireless transceiver may also include a receiving unit and a transmitting unit, or perform the functions of these parts. The wireless transceiver (transmitting unit, receiving unit) may also include an RF (Radio Frequency) module and one or more antennas. The RF module may also include an amplifier, an RF modulator / demodulator, or a device similar to these. Non-limiting examples of communication devices include: phones (mobile phones, smart phones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebook computers, etc.), cameras (digital cameras, digital video cameras, etc.), digital players (digital audio / video players, etc.), wearable devices (wearable cameras, smart watches, tracking devices, etc.), game consoles, e-book readers, telehealth / telemedicine (telehealth / medical prescription) equipment, vehicles or transportation vehicles with communication functions (cars, airplanes, ships, etc.), and combinations of the above-mentioned various devices.

[0247] Communication devices are not limited to portable or mobile devices, but also include all kinds of devices, equipment, and systems that cannot be carried or fixed. For example, they include: smart home devices (home appliances, lighting equipment, smart meters or meters, control panels, etc.), vending machines, and all other "things" that can exist on the IoT (Internet of Things) network.

[0248] The communication includes data communication performed by a cellular system, a wireless LAN (Local Area Network) system, a communication satellite system, etc., and also includes data communication performed by a combination of these systems.

[0249] In addition, the communication device also includes devices such as controllers or sensors connected or linked to the communication equipment that performs the communication functions described in the present disclosure. For example, it includes a controller or sensor that generates a control signal or data signal used by the communication equipment that performs the communication functions of the communication device.

[0250] In addition, the communication device includes infrastructure equipment that communicates with the above-mentioned non-limiting various devices or controls the above-mentioned various devices, such as base stations, access points, and all other devices, equipment, and systems.

[0251] A receiving device according to an embodiment of the present disclosure includes: a receiving circuit that receives a MAC control element (MACCE) and an offset value; and a control circuit that sets a time slot for starting an operation based on a control command of the MAC CE based on the offset value.

[0252] In one embodiment of the present disclosure, the control circuit sets the time slot for starting the operation of the downlink based on the time slot for starting the operation of the uplink and the offset value.

[0253] In one embodiment of the present disclosure, the control circuit sets the time slot for starting the operation of the uplink based on the sending timing of the response information for the physical downlink shared channel (PDSCH) containing the MAC CE. In one embodiment of the present disclosure, the control circuit sets the time slot for starting the operation of the downlink based on the receiving timing of the physical downlink shared channel (PDSCH) containing the MAC CE and the offset value. In one embodiment of the present disclosure, the control circuit sets the time slot for starting the operation of the uplink and the downlink according to the sending timing of the response information for the PDSCH (Physical Downlink Shared Channel) containing the MAC CE.

[0254] A transmitting device according to an embodiment of the present disclosure includes: a control circuit that sets a time slot for starting an operation based on a control command of a MAC control element (MAC CE) based on an offset value; and a transmitting circuit that transmits the offset value and the MAC CE.

[0255] According to a receiving method according to an embodiment of the present disclosure, a receiving device receives a MAC control element (MAC CE) and an offset value, and sets a time slot for starting an operation based on a control command of the MAC CE based on the offset value.

[0256] According to a sending method according to an embodiment of the present disclosure, a sending device sets a time slot for starting an operation based on a control command of a MAC control element (MAC CE) based on an offset value, and sends the offset value and the MAC CE.

[0257] This application claims the priority based on Patent Application No. 2020-022830 filed with the Japan Patent Office on February 13, 2020. The contents of Japanese Patent Application No. 2020-022830 are incorporated herein by reference.

[0258] Industrial Applicability

[0259] One aspect of the present disclosure is useful in a wireless communication system.

[0260] DESCRIPTION OF NUMBERS 100 terminal

[0261] 101 HARQ-ACK generation unit

[0262] 102, 206 Data generation unit

[0263] 103 Data transmission processing unit

[0264] 104, 208 wireless transmission unit

[0265] 105, 201 Antenna

[0266] 106, 202 wireless receiving unit

[0267] 107, 203 Data receiving processing unit

[0268] 108 Position information acquisition unit

[0269] 109 Timing control unit

[0270] 110, 209 Control Unit

[0271] 200 Base Stations

[0272] 204 timing control information generating unit

[0273] 205 MAC CE control unit

[0274] 207 Data transmission processing unit

Claims

1. A receiving device, comprising: A receiving circuit receives a MAC control element (MAC CE) and an offset value for operation timing of the MAC CE, the offset value being different from an offset value K for correction of a long propagation delay offset ;as well as a control circuit that sets a timing for applying an operation based on the control command of the MAC CE based on the offset value, The control circuit sets the timing of applying the operation of the downlink based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE and the offset value, The control circuit sets a timing for applying the operation of the uplink based on a transmission timing of response information for a physical downlink shared channel (PDSCH) including the MAC CE without using the offset value.

2. The receiving device according to claim 1, wherein: The control circuit sets the timing of the operation of the downlink based on the timing of applying the operation of the uplink and the offset value.

3. The receiving device according to claim 2, wherein: The control circuit sets a timing for applying the operation of the uplink based on a transmission timing of response information for a physical downlink shared channel (PDSCH) including the MAC CE.

4. The receiving device according to claim 1, wherein: The control circuit sets a timing for applying the operation of the downlink based on a reception timing of a physical downlink shared channel (PDSCH) including the MAC CE and the offset value.

5. The receiving device according to claim 1, wherein: The offset value indicates the number of time slots, and the offset value is indicated through higher layer signaling.

6. The receiving device according to claim 1, wherein: In case the downlink timing does not match the uplink timing in the gNB in ​​the non-terrestrial network (NTN), an offset is provided.

7. A sending device, comprising: A control circuit that sets the timing of an operation of applying a MAC control element (MAC CE) based on an offset value for the operation timing of the MAC CE, the offset value being different from an offset value K for correction of a long propagation delay offset ;as well as A sending circuit sends the offset value and the MAC CE, The control circuit sets the timing of applying the operation of the downlink based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE and the offset value, The control circuit sets a timing for applying the operation of the uplink based on a transmission timing of response information for a physical downlink shared channel (PDSCH) including the MAC CE without using an offset value.

8. The transmitting device according to claim 7, wherein: The control circuit sets a timing of applying the operation of a downlink based on a timing of applying the operation of an uplink and the offset value.

9. The transmitting device according to claim 8, wherein: The control circuit sets a timing for applying the operation of the uplink based on a transmission timing of response information for a physical downlink shared channel (PDSCH) including the MAC CE.

10. The transmitting device according to claim 7, wherein: The control circuit sets a timing for applying the operation of the downlink based on a reception timing of a physical downlink shared channel (PDSCH) including the MAC CE and the offset value.

11. The transmitting device according to claim 7, wherein: The offset value indicates the number of time slots, and is indicated through higher layer signaling.

12. The transmitting device according to claim 7, wherein: The offset value is provided in case the downlink timing does not match the uplink timing in the gNB in ​​a non-terrestrial network (NTN).

13. A receiving method, This includes the following processing by the receiving device: Receive a MAC control element (MAC CE) and an offset value for the operation timing of the MAC CE, the offset value being different from the offset value K for correction of a long propagation delay offset ;as well as Based on the offset value, setting a timing of applying an operation based on the control command of the MAC CE, The timing of applying the operation of the downlink is set based on the transmission timing of the response information of the physical downlink shared channel (PDSCH) including the MAC CE and the offset value, The timing for applying the operation of the uplink is set without using the offset value based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE.

14. A method of sending, The following processing is performed by the sending device: The timing of the operation of the control command based on the MAC control element (MAC CE) is set based on an offset value for the operation timing of the MAC CE, which is different from the offset value K for correction of the long propagation delay. offset ;as well as sending the offset value and the MAC CE, The timing of applying the operation of the downlink is set based on the transmission timing of the response information of the physical downlink shared channel (PDSCH) including the MAC CE and the offset value, The timing for applying the operation of the uplink is set without using an offset value based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE.

15. An integrated circuit comprising: A receiving circuit controls a MAC control element (MAC CE) and reception of an offset value for operation timing of the MAC CE, wherein the offset value is different from an offset value K for correction of a long propagation delay offset ; as well as a setting circuit that controls setting of a timing of applying an operation based on a control command of the MAC CE based on the offset value, The setting circuit sets the timing of applying the operation of the downlink based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE and the offset value, The setting circuit sets the timing of applying the operation of the uplink based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE without using the offset value.

16. An integrated circuit comprising: A setting circuit that controls setting of a timing of an operation of applying a control command based on a MAC control element (MAC CE) based on an offset value for an operation timing of the MAC CE, the offset value being different from an offset value K for correction of a long propagation delay offset ; as well as a sending circuit, controlling the sending of the offset value and the MAC CE, The setting circuit sets the timing of applying the operation of the downlink based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE and the offset value, The setting circuit sets the timing of applying the operation of the uplink based on the transmission timing of the response information for the physical downlink shared channel (PDSCH) including the MAC CE without using an offset value.

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