WO2021084648A1 - Terminal and wireless base station - Google Patents

Abstract

A terminal 100 comprises: a wireless reception unit 103 that receives, from a gNB210, a downlink signal that includes information for determining a propagation time between the terminal 100 and the gNB210; a control unit 111that acquires the propagation time using the downlink signal; and a wireless transmission unit 101 that transmits, to the gNB210, timing information that includes a new TSN timing (or NR timing) which results from changing a TSN timing (or NR timing) on the basis of the propagation time.

Description

Terminals and wireless base stations

The present invention relates to a terminal and a wireless base station that transmit and receive time information.

The 3rd Generation Partnership Project (3GPP) has specified Long Term Evolution (LTE), and has specified LTE-Advanced (hereinafter referred to as LTE including LTE-Advanced) for the purpose of further speeding up LTE. In addition, 3GPP is also considering the specifications of LTE successor systems called 5G, New Radio (NR), etc.

In 3GPP, in Time-Sensitive Networking (TSN), which enables highly accurate time synchronization between the control source and the end station, the control source uses the TSN via the NR system (hereinafter, TSN). It is being discussed to deliver the time) to the end station (see Non-Patent Document 1).

Specifically, in the NR system, in a configuration in which the control source is connected to the core network and the end station is connected to the terminal (UE), the radio base station (gNB) provides time information including the TSN time. It is being discussed to provide it to the UE.

Furthermore, it is being discussed that the UE provides time information including the TSN time to gNB in the configuration where the control source is connected to the UE and the end station is connected to the core network in the NR system.

However, when the UE provides the TSN time to the gNB, the TSN time received by the gNB is delayed from the TSN time on the UE side due to the propagation time between the UE and the gNB.

Therefore, the TSN time on the UE side and the TSN time on the gNB side do not completely match, and the accuracy of time synchronization between the UE and gNB may decrease.

Considering the realization of high-precision time synchronization in TSN, it is desirable to maintain high-precision time synchronization between UE and gNB.

Therefore, the present invention has been made in view of such a situation, and when the terminal provides the radio base station with time information including the time used in a specific network including TSN and the like, the terminal and the radio are used. An object of the present invention is to provide a terminal and a radio base station capable of maintaining highly accurate time synchronization with a base station.

The terminal (terminal 100) according to one aspect of the present invention is a receiving unit (terminal 100) that receives a downlink signal from a radio base station (gNB210) including information for determining a propagation time between the terminal and the radio base station. A new time in which the time used in a specific network is changed based on the radio receiving unit 103), the control unit (for example, the control unit 111) that acquires the propagation time using the downlink signal, and the propagation time. It is provided with a transmission unit (for example, a radio transmission unit 101) that transmits time information including the above to the radio base station.

The radio base station (gNB210) according to one aspect of the present invention includes an uplink signal from a terminal (terminal 100) that includes information for determining a propagation time between the terminal and the radio base station, and a specific network. The propagation time is acquired by using the receiving unit (wireless receiving unit 213) that receives the time information including the time to be used and the uplink signal, and the propagation time is used in the specific network based on the propagation time. It includes a control unit (for example, control unit 221) that acquires a new time at which the time has been changed.

FIG. 1 is an overall schematic configuration diagram of the control system 10. FIG. 2 is a functional block configuration diagram of the terminal 100. FIG. 3 is a functional block configuration diagram of the gNB 210. FIG. 4 is a diagram illustrating adjustment of transmission timing between the terminal 100 and the gNB 210. FIG. 5 is a diagram showing a sequence of time distribution procedures (operation example 1). FIG. 6 is a diagram illustrating a TimeReferenceInfo information element. FIG. 7 is a diagram illustrating each parameter in the information element shown in FIG. FIG. 8 is a diagram showing a sequence of time distribution procedures (operation example 2). FIG. 9 is a diagram illustrating the measurement of the propagation time by the terminal 100 or the gNB 210. FIG. 10 is a diagram illustrating an example of a message including time change information. FIG. 11 is an overall schematic configuration diagram of the control system 10a. FIG. 12 is a diagram showing an example of the hardware configuration of the terminal 100.

Hereinafter, embodiments will be described based on the drawings. The same functions and configurations are designated by the same or similar reference numerals, and the description thereof will be omitted as appropriate.

(1) Overall Schematic Configuration of Control System FIG. 1 is an overall schematic configuration diagram of the control system 10 according to the embodiment.

The control system 10 includes a TSN grand master (TSNGM) 20, an NR system 30, and a TSN end station 40. In the control system 10, the TSN control source (not shown) controls the TSN end station 40 in real time via the NR system 30. The specific configuration of the control system 10 including the number of TSN GM 20 and TSN end station 40 is not limited to the example shown in FIG.

The TSN GM20 oscillates the clock that is the operation timing of the TSN. Hereinafter, the time generated based on the clock oscillated by the TSN GM20 is referred to as the TSN time. The TSN time is the reference time applied within the TSN.

The TSN time is used to achieve highly accurate time synchronization between the TSN control source and the TSN end station 40. Therefore, the TSN control source and the TSN end station 40 need to be synchronized with the TSN time.

Note that the TSN may be referred to as a specific network or a network other than a wireless network. In this case, the TSN time is referred to as the time used in a particular network or the time used in a network other than the wireless network. In addition, TSN may be referred to as a network in which all nodes included in the network share the same time. Further, the TSN may be referred to as a network that supports deterministic communication or a network that supports isochronous communication.

The NR system 30 includes an NR grandmaster (NR GM) 31, a terminal 100, a Next Generation-Radio Access Network 200 (hereinafter, NG-RAN200), and a core network 300. The terminal is also referred to as a user device (UE). Further, the specific configuration of the NR system 30 including the number of terminals and the number of radio base stations described later is not limited to the example shown in FIG.

The NR GM31 oscillates the clock that is the operation timing of the NR system 30. Hereinafter, the time generated based on the clock oscillated by the NR GM31 is referred to as the NR time. The NR time is the reference time applied within the NR system 30.

The NR time is used to realize highly accurate time synchronization within the NR system 30. Therefore, the terminal 100, the NG-RAN200, and the core network 300 need to be synchronized with the NR time.

The terminal 100 executes wireless communication according to NR between the terminal 100, the NG-RAN200, and the core network 300. Terminal 100 is connected to TSN GM20 and NR GM31.

The NG-RAN200 includes a plurality of NG-RANNodes, specifically, a radio base station (hereinafter referred to as gNB) 210, and is connected to a core network (5GC) 300 according to NR. The NG-RAN200 and the core network 300 may be simply expressed as an NR network. Terminal 100 is connected to the NR network.

The NR network may be referred to as a specific network or a wireless network. In this case, the NR time is referred to as the time used in a specific network or the time used in a wireless network.

Terminal 100 and gNB210 have Massive MIMO that generates a more directional beam by controlling radio signals transmitted from multiple antenna elements, carrier aggregation (CA) that uses multiple component carriers (CC), and carrier aggregation (CA) that uses multiple component carriers (CC). It can support dual connectivity (DC), which simultaneously transmits CC between multiple NG-RAN Nodes and terminals. CC is also called a carrier.

When the terminal 100 is used for the TSN communication service, the terminal 100 acquires the TSN time from the TSN GM20 and provides the time information including the TSN time to the gNB 210.

When the terminal 100 is used for the NR communication service, the terminal 100 acquires the NR time from the NR GM31 and provides the time information including the NR time to the gNB 210.

When the gNB210 receives the time information including the TSN time or the NR time, it acquires the TSN time or the NR time from the time information and transmits it to the core network 300.

Core network 300 includes User Plane Function (UPF) 310. UPF310 provides functions specialized for user plane processing.

The core network 300 is connected to the TSN end station 40 via the UPF310. When the core network 300 receives the TSN time from the gNB 210, it transmits the TSN time to the TSN end station 40.

The TSN end station 40 is, for example, a machine installed in a production factory. The TSN end station 40 updates the TSN time held by the TSN end station 40 at any time based on the TSN time received from the core network 300.

The TSN end station 40 receives a command from the TSN control source via the NR system 30. The control source of the TSN performs real-time control in the control system 10 by performing time scheduling for operating the TSN end station 40 based on the TSN time.

(2) Functional block configuration of the control system Next, the functional block configuration of the control system 10 will be described. Specifically, the functional block configuration of the terminal 100 and the gNB 210 in the NR system 30 will be described. Hereinafter, only the parts related to the features in the present embodiment will be described. Therefore, it goes without saying that the terminal 100 and the gNB 210 include other functional blocks that are not directly related to the features in the present embodiment.

FIG. 2 is a functional block configuration diagram of the terminal 100. The hardware configuration of the terminal 100 will be described later. As shown in FIG. 2, the terminal 100 includes a wireless transmission unit 101, a wireless reception unit 103, a propagation time acquisition unit 105, a time processing unit 107, an RRC message transmission unit 109, and a control unit 111.

The wireless transmission unit 101 transmits an uplink signal (UL signal) according to NR. The radio receiving unit 103 receives the downlink signal (DL signal) according to the NR. Specifically, the wireless transmitter 101 and the wireless receiver 103 include a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical downlink control channel (PDCCH), and a physical downlink shared channel (PDSCH). ), Physical random access channel (PRACH), etc., to execute wireless communication between terminal 100 and gNB210.

The wireless transmitter 101 transmits an RRC message to the gNB 210. The wireless transmission unit 101 transmits time information including the TSN time to the gNB 210. The wireless transmission unit 101 transmits time information including the NR time to the gNB 210.

The wireless transmission unit 101 transmits a random access preamble (Msg.1) to the gNB 210 in the random access (RA) procedure. The radio transmission unit 101 transmits a reference signal such as a sounding reference signal (SRS) and a demodulation reference signal (DMRS) to the gNB 210. The wireless transmission unit 101 transmits the measurement signal on the terminal side to the gNB 210.

The wireless receiver 103 receives a random access response (Msg.2) from the gNB 210 in the RA procedure. The random access response is a response signal to the above-mentioned random access preamble and includes a timing advance (TA) command. The TA command contains a TA value used to adjust the transmission timing of the terminal 100.

The wireless receiver 103 receives a control message (TAMACCE) in the medium access control (MAC) layer from the gNB210. TAMACCE is a response signal to the above-mentioned reference signal, and includes a TA command used to adjust the transmission timing of the terminal 100.

The wireless receiver 103 receives the measurement response signal on the terminal side from the gNB 210. The measurement response signal on the terminal side is a response signal to the above-mentioned measurement signal on the terminal side.

As will be described later, the propagation time acquisition unit 105 acquires the propagation time between the terminal 100 and the gNB 210 by using downlink signals such as the TA command included in the random access response and the TA command included in the TA MAC CE. To do.

As will be described later, the propagation time acquisition unit 105 is based on the time difference between the time when the wireless transmission unit 101 transmits the measurement signal on the terminal side and the time when the wireless reception unit 103 receives the measurement response signal on the terminal side. Get the propagation time between terminal 100 and gNB210.

The time processing unit 107 receives the TSN time from the TSN GM20. The time processing unit 107 receives the NR time from the NR GM31.

The time processing unit 107 changes the TSN time and acquires a new TSN time based on the propagation time acquired by the propagation time acquisition unit 105. For example, the time processing unit 107 adds the propagation time to the TSN time to acquire a new TSN time.

As a result, the terminal 100 can transmit to the gNB 210 a new TSN time in which the propagation time between the terminal 100 and the gNB 210 is compensated for the TSN time.

The time processing unit 107 changes the NR time and acquires a new NR time based on the propagation time acquired by the propagation time acquisition unit 105. For example, the time processing unit 107 adds the propagation time to the NR time to acquire a new NR time.

As a result, the terminal 100 can transmit to the gNB 210 a new NR time in which the propagation time between the terminal 100 and the gNB 210 is compensated for the NR time.

The RRC message transmission unit 109 includes the new TSN time acquired by the time processing unit 107 in the time information, and provides the time information to the gNB 210 using the RRC message. The RRC message is, for example, UL Information Transfer.

The RRC message transmission unit 109 includes the new NR time acquired by the time processing unit 107 in the time information, and provides the time information to the gNB 210 using the RRC message. The RRC message is, for example, UL Information Transfer.

When the gNB 210 can compensate for the propagation time between the terminal 100 and the gNB 210 with respect to the TSN time or the NR time, the RRC message transmission unit 109 uses the RRC message to cause the terminal 100 to use the TSN time or the TSN time. Sends information to gNB210 indicating whether or not the NR time has been changed.

The control unit 111 controls each functional block constituting the terminal 100.

The control unit 111 determines which time to acquire, the TSN time or the NR time.

When the control unit 111 decides to acquire the TSN time, it instructs the time processing unit 107 to acquire the TSN time from the TSN GM20. When the control unit 111 determines to acquire the NR time, the control unit 111 instructs the time processing unit 107 to acquire the NR time from the NR GM31.

The control unit 111 executes a random access procedure between the terminal 100 and the gNB 210. As will be described later, the control unit 111 receives the random access response from the gNB 210 and adjusts the transmission timing of the terminal 100 by using the TA value included in the TA command in the random access response.

As will be described later, the control unit 111 receives the TAMACCE from the gNB210 and adjusts the transmission timing of the terminal 100 by using the TA value included in the TA command in the TAMACCE.

The control unit 111 controls the operations of the propagation time acquisition unit 105 and the time processing unit 107 described above when the terminal 100 compensates for the propagation time between the terminal 100 and the gNB 210 with respect to the TSN time or the NR time. To do.

FIG. 3 is a functional block configuration diagram of gNB210. The hardware configuration of gNB210 will be described later. As shown in FIG. 3, the gNB 210 includes a wireless transmission unit 211, a wireless reception unit 213, a propagation time acquisition unit 215, a time processing unit 217, a TA command transmission unit 219, and a control unit 221.

The wireless transmission unit 211 transmits a downlink signal (DL signal) according to NR. The wireless receiver 213 receives the uplink signal (UL signal) according to the NR. Specifically, the radio transmission unit 211 and the radio reception unit 213 include a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical downlink control channel (PDCCH), and a physical downlink shared channel (PDSCH). ), Physical random access channel (PRACH), etc., to execute wireless communication between terminal 100 and gNB210.

The wireless transmission unit 211 transmits a random access response (Msg.2) including a TA command to the terminal 100 in the RA procedure. The wireless transmission unit 211 transmits the TA MAC CE including the TA command to the terminal 100. The radio transmission unit 211 transmits the measurement signal on the radio base station side to the terminal 100.

The wireless receiver 213 receives the RRC message from the terminal 100. The wireless receiver 213 receives time information including the TSN time from the terminal 100. The wireless receiver 213 receives time information including the NR time from the terminal 100.

The wireless receiver 213 receives the random access preamble (Msg.1) from the terminal 100 in the RA procedure. The wireless receiver 213 receives a reference signal such as SRS or DMRS from the terminal 100. The radio receiving unit 213 receives the measurement response signal on the radio base station side from the terminal 100. The measurement response signal on the radio base station side is a response signal to the measurement signal on the radio base station side described above.

The propagation time acquisition unit 215 acquires the propagation time between the terminal 100 and the gNB 210 by using an uplink signal such as a random access preamble or a reference signal, as will be described later.

As will be described later, the propagation time acquisition unit 215 is between the time when the radio transmission unit 211 transmits the measurement signal on the radio base station side and the time when the radio reception unit 213 receives the measurement response signal on the radio base station side. From the time difference, the propagation time between the terminal 100 and the gNB 210 is acquired.

The time processing unit 217 changes the TSN time and acquires a new TSN time based on the propagation time acquired by the propagation time acquisition unit 215. For example, the time processing unit 217 adds the propagation time to the TSN time to acquire a new TSN time.

As a result, the gNB 210 can acquire a new TSN time in which the propagation time between the terminal 100 and the gNB 210 is compensated for the TSN time.

The time processing unit 217 changes the NR time and acquires a new NR time based on the propagation time acquired by the propagation time acquisition unit 215. For example, the time processing unit 217 adds the propagation time to the NR time to acquire a new NR time.

As a result, the gNB 210 can acquire a new NR time that compensates for the propagation time between the terminal 100 and the gNB 210 with respect to the NR time.

The TA command transmission unit 219 determines the TA value based on the propagation time acquired by the propagation time acquisition unit 215, and uses a random access response or TAMACCE to issue a TA command including the determined TA value to the terminal 100. Send to.

The control unit 221 controls each functional block constituting the gNB 210.

The control unit 221 executes a random access procedure between the terminal 100 and the gNB 210. The control unit 221 controls the operation of the TA command transmission unit 219, transmits a TA command to the terminal 100 using a random access response, and causes the terminal 100 to adjust the transmission timing of the terminal 100, as will be described later.

The control unit 221 controls the operation of the TA command transmission unit 219, transmits a TA command to the terminal 100 using TAMACCE, and causes the terminal 100 to adjust the transmission timing of the terminal 100, as will be described later.

The control unit 221 controls the operations of the propagation time acquisition unit 215 and the time processing unit 217 described above when the gNB 210 compensates for the propagation time between the terminal 100 and the gNB 210 with respect to the TSN time or the NR time. ..

(3) Operation of the control system Next, the operation of the control system 10 will be described. Specifically, the time distribution procedure in which the terminal 100 provides the time information including the TSN time or the time information including the NR time to the gNB 210 will be described.

(3.1) Operation example 1
In operation example 1, in the time distribution procedure, the terminal 100 acquires the propagation time between the terminal 100 and the gNB 210 by using the TA command including the TA value used for adjusting the transmission timing, and obtains the TSN time or the NR time. On the other hand, the propagation time between the terminal 100 and the gNB 210 is compensated.

(3.1.1) Adjustment of transmission timing First, adjustment of transmission timing will be described. FIG. 4 is a diagram illustrating adjustment of transmission timing between the terminal 100 and the gNB 210. As shown in FIG. 4, the terminal 100 executes the RA procedure using PRACH when starting the initial access to the gNB 210. In the RA procedure, terminal 100 transmits a random access preamble (Msg.1) to gNB210 (S1). Msg.1 contains the information that gNB210 uses to determine the propagation time.

When gNB210 receives Msg.1 from terminal 100, for example, using Msg.1, it estimates the propagation time between terminal 100 and gNB210 from the deviation of the reception timing of Msg.1 with respect to the reference timing. Determine the deviation of the transmission timing of the terminal 100. The propagation time is also referred to as a propagation delay between the terminal 100 and the gNB 210, or a propagation delay time.

The gNB210 determines the TA value used to adjust the transmission timing of the terminal 100 based on the deviation of the transmission timing of the terminal 100.

For example, gNB210 receives one random access preamble selected from a plurality of (for example, 64) random access preambles from the terminal 100. The gNB210 performs a convolution calculation of the received random access preamble with each of the plurality of random access preambles. Since the random access preamble is an orthogonal sequence, the convolution calculation gives a delay profile in which the peak appears. gNB210 determines the TA value from the delay profile. This allows the gNB 210 to identify how far the terminal 100 is from the center of the cell.

When the gNB210 determines the TA value, it uses a random access response (Msg.2) to send a TA command including the TA value to the terminal 100 (S3). The TA value contains information used by the terminal 100 to determine the propagation time.

When the terminal 100 receives Msg.2 from the gNB210, it activates the TA timer and adjusts the transmission timing using the TA value included in the TA command (S5). The terminal 100 can acquire the propagation time between the terminal 100 and the gNB 210 based on the TA value.

When the terminal 100 initially accesses the gNB210, it transmits a reference signal such as SRS or DMRS to the gNB210 (S7). The SRS is a reference signal used to estimate the uplink radio quality and is transmitted to the gNB 210 at defined intervals. When the gNB210 receives the SRS, it uses the SRS to perform uplink scheduling. The SRS contains the information that gNB210 uses to determine the propagation time.

DMRS is a reference signal used to estimate the wireless quality of the uplink, and is transmitted to gNB210 when user data is transmitted. When the gNB210 receives the DMRS, it demodulates the user data using the DMRS. The DMRS contains the information that gNB210 uses to determine the propagation time.

The gNB210 uses, for example, a reference signal such as SRS or DMRS to estimate the propagation time between the terminal 100 and the gNB 210 from the deviation of the reception timing of the reference signal with respect to the reference timing, and the deviation of the transmission timing at the terminal 100. To determine. The gNB 210 determines the TA value used to adjust the transmission timing of the terminal 100 based on the deviation of the transmission timing. When the gNB210 determines the TA value, it uses TAMACCE to send a TA command including the TA value to the terminal 100 (S9). The TA value contains information used by the terminal 100 to acquire the propagation time.

When the terminal 100 receives TAMACCE from gNB210, it restarts the TA timer and adjusts the transmission timing using the TA value included in the TA command (S11). The terminal 100 can acquire the propagation time between the terminal 100 and the gNB 210 based on the TA value.

If the terminal 100 does not receive the TA command by the time the TA timer expires, the terminal 100 re-executes the RA procedure between the terminal 100 and the gNB 210 to adjust the transmission timing.

In this way, the terminal 100 can acquire the propagation time between the terminal 100 and the gNB 210 based on the TA value included in the TA command. Further, the gNB 210 can acquire the propagation time between the terminal 100 and the gNB 210 based on Msg.1, SRS, DMRS and the like.

(3.1.2) Time distribution procedure FIG. 5 is a diagram showing a sequence of time distribution procedures in operation example 1. As shown in FIG. 5, the terminal 100 acquires the TSN time (or NR time) from the TSN GM 20 (or NR GM 31) (S31). Terminal 100 receives a TA command from the NR network (specifically, gNB210) (S33). The TA command is included in the random access response (Msg.2) or TA MAC CE.

When the terminal 100 receives the TA command from the NR network, the terminal 100 acquires the propagation time between the terminal 100 and the gNB 210 using the TA value included in the TA command (S35). When the terminal 100 acquires the propagation time, the terminal 100 changes the TSN time (or NR time) acquired in S31 based on the acquired propagation time (S37).

For example, the terminal 100 adds the propagation time acquired in S33 to the TSN time (or NR time) acquired in S31. As a result, the terminal 100 can acquire a new TSN time (or a new NR time) in which the propagation time between the terminal 100 and the gNB 210 is compensated for the TSN time (or NR time).

Thus, the new TSN time (or new NR time) is the time obtained by adding the propagation time to the TSN time (or NR time). The new TSN time is also referred to as the changed TSN time, the compensated TSN time, or the corrected TSN time. The new NR time is also referred to as the changed NR time, the compensated NR time, or the corrected NR time.

The terminal 100 classifies the propagation time into a plurality of groups (for example, a long-time group, a medium-time group, and a short-time group) according to the length of the propagation time, and sets an offset value for each group in advance. It may be associated. In this case, the terminal 100 adds an offset value associated with the group to which the propagation time acquired in S33 belongs to the TSN time (or NR time) acquired in S31.

When the terminal 100 acquires a new TSN time (or new NR time) in which the TSN time (or NR time) is changed based on the propagation time, the terminal 100 includes the new TSN time (or new NR time) in the time information and makes an RRC message. Is used to transmit the time information to the NR network (specifically, gNB210) (S39).

In S39, the terminal 100 uses the RRC message to transmit information indicating which of the TSN time and the NR time is included in the time information to the NR network. The terminal 100 may transmit the information to the NR network by using a message different from the RRC message.

The RRC message is, for example, UL Information Transfer. In this case, ULInformationTransfer defines a TimeReferenceInfo information element (time information).

FIG. 6 is a diagram illustrating a TimeReferenceInfo information element. As shown in FIG. 6, the TimeReferenceInfo information element has four parameters (time, uncertainty, timeInfoType and referenceSFN).

FIG. 7 is a diagram for explaining each parameter in the information element shown in FIG. As shown in FIG. 8, a time (for example, TSN time or NR time) is specified as time. In time, the time ticking accuracy is 32.576ns.

Uncertainty specifies the tolerance of the error at the time specified by time.

In timeInfoType, whether or not the time specified by time is set based on the local clock (for example, TSN clock or NR clock) is specified.

In referenceSFN, the subframe number that reads the time specified by time is specified.

The TimeReferenceInfo information element may have a time identifier used to identify the TSN time and the NR time.

Returning to FIG. 5, when the NR network receives the time information from the terminal 100, it acquires a new TSN time (or a new NR time) from the time information. When the NR network acquires a new TSN time, it sends the TSN time to the TSN end station 40 (S41).

Note that the terminal 100 may receive a TA command from the NR network (S33) before acquiring the TSN time (or NR time) from the TSN GM20 (or NR GM31) (S31).

The terminal 100 may hold the TA value included in the TA command each time it receives the TA command from the NR network in the specified period. In this case, the terminal 100 performs statistical processing on the held plurality of TA values in S35 to acquire the propagation time. For example, the terminal 100 acquires the average of a plurality of TA values held in S35, and uses the average to acquire the propagation time between the terminal 100 and the gNB 210.

The terminal 100 may acquire the propagation time using the TA value included in the TA command each time it receives the TA command from the NR network in the specified period, and hold the acquired propagation time. In this case, the terminal 100 performs statistical processing on the held plurality of propagation times in S35. For example, the terminal 100 acquires the average of the retained propagation times in S35. Subsequently, the terminal 100 changes the TSN time or NR time acquired in S31 based on the average of the propagation times acquired in S37.

(3.2) Operation example 2
In operation example 2, in the time distribution procedure, gNB210 acquires the propagation time between the terminal 100 and gNB210 by using the random access preamble (Msg.1) shown in FIG. 4 or the reference signal such as SRS or DMRS. , TSN time or NR time, compensates for the propagation time between terminal 100 and gNB210.

(3.2.1) Time distribution procedure FIG. 8 is a diagram showing a sequence of time distribution procedures in operation example 2. As shown in FIG. 8, the terminal 100 transmits a reference signal such as a random access preamble (Msg.1) or SRS, DMRS, etc. to the NR network (specifically, gNB210) (S51). When the NR network receives the Msg.1 or reference signal from the terminal 100, the NR network uses the Msg.1 or the reference signal to acquire the propagation time between the terminal 100 and the gNB 210 (S53).

The terminal 100 acquires the TSN time (or NR time) from the TSN GM20 (or NRGM31) (S55). When the terminal 100 acquires the TSN time (or NR time), the terminal 100 includes the TSN time (or NR time) in the time information and transmits the time information to the NR network using the RRC message (S57).

In S57, the terminal 100 transmits information indicating which of the TSN time and the NR time is included in the time information to the NR network. The terminal 100 may transmit the information to the NR network by using a message different from the RRC message.

The RRC message is, for example, UL Information Transfer. In this case, the ULInformationTransfer defines the TimeReferenceInfo information element (time information) described above.

When the NR network receives the time information from the terminal 100, it acquires the TSN time (or NR time) from the time information. The NR network (specifically, gNB210) changes the TSN time (or NR time) based on the propagation time acquired in S53 (S59).

For example, the NR network adds the propagation time acquired in S53 to the TSN time (or NR time). As a result, the NR network can acquire a new TSN time (or NR time) in which the propagation time between the terminal 100 and the gNB 210 is compensated for the TSN time (or NR time).

The NR network classifies the propagation time into a plurality of groups (for example, a long-time group, a medium-time group, and a short-time group) according to the length of the propagation time, and sets an offset value for each group in advance. It may be associated. In this case, the NR network adds the offset value associated with the group to which the propagation time acquired in S53 belongs to the TSN time (or NR time).

When the NR network acquires a new TSN time, it sends the TSN time to the TSN end station 40 (S61).

Note that the terminal 100 may acquire the TSN time (or NR time) from the TSN GM20 (or NR GM31) before transmitting the Msg.1 or the reference signal to the NR network (S51) (S55). In this case, when the terminal 100 is connected to the NR network, the terminal 100 transmits the time information including the TSN time (or NR time) to the NR network before transmitting the reference signal to the NR network (S51). May be (S57).

Even if the NR network acquires the propagation time using the Msg.1 or the reference signal each time it receives the Msg.1 or the reference signal from the terminal 100 in the specified period and holds the acquired propagation time. Good. In this case, the NR network performs statistical processing on the plurality of propagation times held in S53. For example, the NR network gets the average of the retained propagation times at S53. Subsequently, the NR network changes the TSN time or the NR time at S59 based on the average of the acquired propagation times.

(3.3) Operation example 3
In operation example 3, in the time distribution procedure, the terminal 100 acquires the propagation time between the terminal 100 and the gNB 210 by using the measurement signal and the measurement response signal on the terminal side, and with respect to the TSN time or the NR time. Compensate for the propagation time between terminal 100 and gNB210.

(3.3.1) Measurement of Propagation Time First, the measurement of propagation time will be described. FIG. 9 is a diagram illustrating the measurement of the propagation time by the terminal 100 or the gNB 210. As shown in FIG. 9, the terminal 100 transmits the measurement signal on the terminal side to the gNB 210 (S71). The measurement signal on the terminal side is received by the gNB 210 after the time τ has elapsed from the reference timing at which the terminal 100 transmits the measurement signal on the terminal side (S73).

The gNB210 receives the measurement signal on the terminal side and at the same time transmits the measurement response signal on the terminal side to the terminal 100 (S75). The measurement response signal on the terminal side is received by the terminal 100 after a lapse of time 2τ from the reference timing at which the terminal 100 transmits the measurement signal on the terminal side (S77).

The terminal 100 can acquire the propagation time τ between the terminal 100 and the gNB 210 from the time difference 2τ between the transmission timing (reference timing) of the measurement signal on the terminal side and the reception timing of the measurement response signal on the terminal side. .. As described above, the measurement response signal on the terminal side includes the information used by the terminal 100 to determine the propagation time.

Similarly, the gNB210 transmits the measurement signal on the radio base station side to the terminal 100 (S71). The measurement signal on the radio base station side is received by the terminal 100 after the time τ has elapsed from the reference timing at which the gNB 210 transmitted the measurement signal on the radio base station side (S73).

The terminal 100 receives the measurement signal on the radio base station side and at the same time transmits the measurement response signal on the radio base station side to the gNB 210 (S75). The measurement response signal on the radio base station side is received by the gNB 210 after a lapse of time 2τ from the reference timing at which the gNB 210 transmits the measurement signal on the radio base station side (S77).

The gNB 210 acquires the propagation time τ between the terminal 100 and the gNB 210 from the time difference 2τ between the transmission timing (reference timing) of the measurement signal on the radio base station side and the reception timing of the measurement response signal on the radio base station side. be able to. As described above, the measurement response signal on the radio base station side includes the information used by the gNB 210 to determine the propagation time.

(3.3.2) Time distribution procedure In operation example 3, the terminal 100 uses the TA command in S35 of FIG. 5 to acquire the propagation time between the terminal 100 and the gNB 210, as described above. The propagation time τ is obtained by measuring the propagation time.

Specifically, the terminal 100 acquires the propagation time τ by measuring the propagation time at S35. The terminal 100 changes the TSN time (or NR time) acquired in S31 based on the propagation time τ in S37.

Other operations are the same as S31, S39, and S41 in FIG.

(3.4) Operation example 4
In operation example 4, in the time distribution procedure, gNB210 acquires the propagation time between the terminal 100 and gNB210 using the measurement signal and measurement response signal on the radio base station side shown in FIG. 9, and obtains the TSN time or NR. The time is compensated for the propagation time between the terminal 100 and the gNB 210.

(3.4.1) Time distribution procedure In operation example 2, the NR network uses Msg.1 or a reference signal in S53 of FIG. 8 instead of acquiring the propagation time between the terminal 100 and the gNB 210. In addition, the propagation time τ is obtained by measuring the propagation time described above.

Specifically, the NR network acquires the propagation time τ by measuring the propagation time at S53. The NR network changes the TSN time (or NR time) acquired in S57 based on the propagation time τ in S59.

Other operations are the same as S55 and S61 in FIG.

(3.5) Others In Operation Example 1, the terminal 100 changes the TSN time (or NR time) acquired in S31 based on the propagation time acquired in S35 in S37, but is not limited to this. For example, the terminal 100 uses an RRC message to transmit the time information including the TSN time (or NR time) acquired in S31 and the propagation time acquired in S35 to the NR network (specifically, gNB210). You may. In this case, the NR network changes the received TSN time (or NR time) based on the received propagation time.

In the operation example 1 or the operation example 3, when the NR network (specifically, gNB210) can compensate the TSN time (or NR time) for the propagation time between the terminal 100 and the gNB210. , The terminal 100 uses the RRC message to transmit the time change information indicating whether or not the terminal 100 has changed the TSN time or the NR time to the NR network.

FIG. 10 is a diagram illustrating an example of a message including time change information. As shown in FIG. 10, the RRC message includes time information and time change information.

For example, the time change information is composed of 1 bit ("0" or "1"). For example, when the terminal 100 changes the TSN time (or NR time) acquired in S31 based on the propagation time acquired in S35 in S37, the value of the time change information is set to "1".

When the NR network identifies that the value of the time change information included in the RRC message is set to "1", the terminal with respect to the TSN time (or NR time) acquired from the time information included in the RRC message. Does not perform an operation that compensates for the propagation time between 100 and gNB210.

Note that the terminal 100 may transmit the time change information to the NR network using a message different from the RRC message.

Similarly, in operation example 2 or operation example 4, when the terminal 100 can compensate the TSN time (or NR time) for the propagation time between the terminal 100 and the gNB 210, the NR network is determined. The time change information indicating whether or not the NR network has changed the TSN time or the NR time may be transmitted to the terminal 100.

(4) Action / Effect According to the above-described embodiment, the terminal 100 acquires the propagation time between the terminal 100 and the gNB 210 by using a downlink signal such as a TA command or a measurement response signal on the terminal side. The terminal 100 transmits the time information including the new TSN time (or new NR time) in which the TSN time (or NR time) is changed based on the propagation time to the gNB 210.

With such a configuration, the terminal 100 transmits to the gNB 210 a new TSN time (or a new NR time) in which the propagation time between the terminal 100 and the gNB 210 is compensated for the TSN time (or NR time). be able to.

Therefore, highly accurate time synchronization can be maintained between the terminal 100 and the gNB 210.

Therefore, even if there is a request to set the TSN GM20 (or NR GM31) on the terminal 100 side, highly accurate time synchronization in the TSN can be realized.

According to the above-described embodiment, the new TSN time (or new NR time) is the time obtained by adding the propagation time to the TSN time (or NR time).

With such a configuration, the terminal 100 can reliably compensate for the propagation time between the terminal 100 and the gNB 210 with respect to the TSN time (or NR time).

According to the above-described embodiment, the gNB210 sets the TSN time (or NR time) based on the propagation time acquired by using the uplink signal such as the random access preamble, the reference signal, and the measurement response signal on the radio base station side. If it can be changed, the terminal 100 transmits time change information indicating whether or not the terminal 100 has changed the TSN time (or NR time) to the gNB 210.

With such a configuration, when both the terminal 100 and the gNB 210 can compensate for the propagation time between the terminal 100 and the gNB 210 with respect to the TSN time (or NR time), the terminal 100 and the gNB 210 Both can be avoided to compensate or not compensate for the propagation time between the terminal 100 and the gNB 210.

According to the above-described embodiment, the gNB 210 acquires the propagation time between the terminal 100 and the gNB 210 using an uplink signal such as a random access preamble or a reference signal, and based on the propagation time, the TSN time. Get the new TSN time (or new NR time) that changed (or NR time).

With such a configuration, the gNB 210 can acquire a new TSN time (or a new NR time) in which the propagation time between the terminal 100 and the gNB 210 is compensated for the TSN time (or NR time).

Therefore, highly accurate time synchronization can be maintained between the terminal 100 and the gNB 210.

Therefore, even if there is a request to set the TSN GM20 (or NR GM31) on the terminal 100 side, highly accurate time synchronization in the TSN can be realized.

According to the above-described embodiment, the gNB 210 acquires a new TSN time (or new NR time) by adding the propagation time to the TSN time (or NR time).

With such a configuration, the gNB 210 can reliably compensate for the propagation time between the terminal 100 and the gNB 210 with respect to the TSN time (or NR time).

(5) Other Embodiments Although the contents of the present invention have been described above according to the embodiments, the present invention is not limited to these descriptions, and various modifications and improvements are possible. It is self-evident to the trader.

The control system 10 may include an LTE system instead of the NR system 30.

In this case, the LTE system includes Evolved Universal Terrestrial Radio Access Network (E-UTRAN) instead of NG-RAN200. E-UTRAN includes a plurality of E-UTRAN Nodes, specifically eNB (or en-gNB), and is connected to an LTE-compliant core network (EPC).

In addition, the LTE system includes LTE GM that oscillates the clock that is the operation timing of the LTE system instead of NRGM31. The terminal 100 is connected to the LTE GM and acquires the LTE time generated based on the clock oscillated by the LTE GM.

In the above-described embodiment, as shown in FIG. 1, in the control system 10, the NR GM31 is connected to the terminal 100, but the present invention is not limited to this.

FIG. 11 is an overall schematic configuration diagram of the control system 10a. As shown in FIG. 11, in the control system 10a, the NR GM31 is connected to the gNB 210. The other configurations of the control system 10a are the same as the configurations of the control system 10.

In this configuration, when the terminal 100 compensates for the propagation time between the terminal 100 and the gNB 210 with respect to the NR time, when the terminal 100 receives the NR time from the gNB 210 by broadcasting or unicast, the TA command is sent. The propagation time is acquired using the included TA value, and the new NR time is acquired by changing the NR time based on the acquired propagation time.

On the other hand, when the gNB210 compensates for the propagation time between the terminal 100 and the gNB210 with respect to the NR time, when the gNB210 receives the NR time from the NR GM31, the gNB210 receives a reference signal such as Msg.1 or SRS, DMRS. Acquires the propagation time using, and acquires a new NR time in which the NR time is changed based on the acquired propagation time. The gNB210 transmits a new NR time compensated for the propagation time to the terminal 100 by unicast.

The block configuration diagrams (FIGS. 2 and 3) used in the description of the above-described embodiment show blocks for functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, deemed, and notification ( Broadcast, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but not limited to these. .. For example, a functional block (constituent unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter). As described above, the method of realizing each of them is not particularly limited.

Further, the terminal 100 and the gNB 210 described above may function as a computer that processes the wireless communication method of the present disclosure. FIG. 12 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 12, the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the device may be configured to include one or more of each of the devices shown in the figure, or may be configured not to include some of the devices.

Each functional block of the device is realized by any hardware element of the computer device or a combination of the hardware elements.

Further, for each function in the device, by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, the processor 1001 performs the calculation, controls the communication by the communication device 1004, and the memory. It is realized by controlling at least one of reading and writing of data in 1002 and storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. Further, the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. Storage 1003 may be referred to as auxiliary storage. The recording medium described above may be, for example, a database, server or other suitable medium containing at least one of memory 1002 and storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.

The input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

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

Further, the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA). The hardware may implement some or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

Further, the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI), upper layer signaling (eg, RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)). (MIB), System Information Block (SIB)), other signals or a combination thereof. RRC signaling may also be referred to as an RRC message, for example, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.

Each aspect / embodiment described in the present disclosure includes LongTermEvolution (LTE), LTE-Advanced (LTE-A), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), FutureRadioAccess (FRA), NewRadio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UltraMobile Broadband (UMB), IEEE802.11 (Wi-Fi (registered trademark)) , IEEE802.16 (WiMAX®), IEEE802.20, Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the next-generation systems extended based on them. It may be applied to one. In addition, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station in the present disclosure may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with the terminal are performed by the base station and other network nodes other than the base station (for example, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information and signals (information, etc.) can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information can be overwritten, updated, or added. The output information may be deleted. The input information may be transmitted to another device.

The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

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

Note that the terms explained in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in any respect limited names. is not it.

In this disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "cell group" Terms such as "carrier" and "component carrier" can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells (also called sectors). When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)). Communication services can also be provided by Head: RRH).

The term "cell" or "sector" refers to a base station that provides communication services in this coverage, and part or all of the coverage area of at least one of the base station subsystems.

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

Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the mobile station may have the functions of the base station. In addition, words such as "up" and "down" may be read as words corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, and the like may be read as a side channel.

Similarly, the mobile station in the present disclosure may be read as a base station. In this case, the base station may have the functions of the mobile station.

The wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe.

The subframe may be further composed of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.

The numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame configuration, transmission / reception. It may indicate at least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like.

The slot may be composed of one or more symbols (Orthogonal Frequency Division Multiple Access (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Slots may be unit of time based on numerology.

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. The mini-slot may also be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.

For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as TTI, and one slot or one minislot may be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

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

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

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may also be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) may be read as less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

The resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in RB may be the same regardless of numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs include a physical resource block (Physical RB: PRB), a sub-carrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), a PRB pair, an RB pair, and the like. May be called.

Further, the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. Good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

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

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. , Electromagnetic energies with wavelengths in the microwave and light (both visible and invisible) regions, etc., can be considered to be "connected" or "coupled" to each other.

The reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot (Pilot) depending on the applicable standard.

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

Any reference to elements using designations such as "first", "second" as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include that the nouns following these articles are plural.

The terms "determining" and "determining" used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

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

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as an amendment or modification without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of the present disclosure is for the purpose of exemplary explanation and does not have any limiting meaning to the present disclosure.

10, 10a Control system
20 TSN GM
30 NR system
31 NR GM
40 TSN end station
100 terminals
101 Wireless transmitter
103 Wireless receiver
105 Propagation time acquisition section
107 Time processing unit
109 RRC message transmitter
111 Control unit
200 NG-RAN
210 gNB
211 Wireless transmitter
213 Wireless receiver
215 Propagation time acquisition section
217 Time processing unit
219 TA command transmitter
221 Control unit
300 core network
310 UPF
1001 processor
1002 memory
1003 storage
1004 communication device
1005 input device
1006 output device
1007 bus

Claims (5)

1. It ’s a terminal,
   A receiving unit that receives a downlink signal from the radio base station, which includes information for determining the propagation time between the terminal and the radio base station.
   A control unit that acquires the propagation time using the downlink signal, and
   A terminal including a transmission unit that transmits time information including a new time in which a time used in a specific network is changed based on the propagation time to the radio base station.
2. The terminal according to claim 1, wherein the new time is a time obtained by adding the propagation time to the time used in the specific network.
3. When the radio base station can change the time used in the specific network based on the propagation time acquired by using the uplink signal, the transmitter can be used by the terminal in the specific network. The terminal according to claim 1, wherein information indicating whether or not the time used has been changed is transmitted to the radio base station.
4. It ’s a wireless base station,
   A receiving unit that receives from a terminal an uplink signal including information for determining a propagation time between the terminal and the radio base station, and time information including a time used in a specific network.
   A control unit that acquires the propagation time using the uplink signal and acquires a new time obtained by changing the time used in the specific network based on the propagation time.
   A wireless base station equipped with.
5. The radio base station according to claim 4, wherein the control unit adds the propagation time to the time used in the specific network to acquire the new time.

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