WO2020165979A1 - Radio base station and user equipment - Google Patents

Abstract

A gNB (200) according to the invention is provided with: a reception unit (203) that receives a TSN time serving as a time reference in a predetermined network (10); a control unit (205) that shortens a transmission period of system information including the TSN time; and a transmission unit (201) that broadcasts the system information in the transmission period as shortened.

Description

Radio base station and user equipment

The present invention relates to a wireless base station and user equipment used for remote control.

The 3rd Generation Partnership Project (3GPP) has specified Long Term Evolution (LTE) and has specified LTE-Advanced (hereinafter, LTE including LTE-Advanced) for the purpose of further speeding up LTE. Further, in 3GPP, specifications of a successor system to LTE called 5G New Radio (NR) or Next Generation (NG) are being considered.

In the industrial Internet of things (IoT), it has been discussed to use Time-Sensitive Networking (TSN) to remotely control machines (for example, robot arms) in production plants via an NR system. (See Non-Patent Document 1).

In Non-Patent Document 1, in order to support remote control, the synchronization accuracy between the TSN control source and the machine in the production plant, which is the TSN end station, is suppressed to a synchronization deviation of about 1 μs (=1000 ns). Requesting that.

However, in the NR system, a synchronization shift of about 500 ns occurs in the backhaul, which is a relay line that connects the core network and the radio base station (gNB).

Therefore, in order to meet the above requirements, it is necessary to suppress the synchronization accuracy between the gNB and the user equipment (User Equipment, UE) to a synchronization deviation of about 500 ns.

However, in the gNB, stratum 4 clock was used for time synchronization between the TSN grand master clock (TSN GMC), which is the TSN operation timing, and the NR grand master clock (NR,GMC), which is the gNB operation timing. In this case, the maximum deviation is 32 μs per second.

On the other hand, in gNB, the minimum transmission cycle of the conventional system information for notifying the time is 80 ms.

Therefore, in the conventional system information transmission cycle, there is a possibility that the synchronization accuracy between gNB and UE cannot be suppressed to a synchronization deviation of about 500 ns.

Therefore, the present invention has been made in view of such a situation, the control source of the TSN, via the NR system, a radio base that can execute remote control of the end station of the TSN with higher synchronization accuracy. It is an object to provide a station and a user equipment.

A radio base station (200) according to one aspect of the present invention includes a receiving unit (203) that receives time information serving as a time reference in a predetermined network, and a control unit that shortens a transmission cycle of system information including the time information. (205), and a transmitter (201) for notifying the system information at the shortened transmission cycle.

A radio base station (200) according to one aspect of the present invention includes a receiving unit (203) that receives time information serving as a time reference in a predetermined network, and a main transmission that periodically transmits system information including the time information. A control unit (205) that sets at least one sub-transmission timing whose timing is shifted in the time axis direction, and a transmission unit (201) that notifies the system information at the main transmission timing and the at least one sub-transmission timing. And

A radio base station (200) according to one aspect of the present invention includes a receiving unit (203) that receives time information that serves as a time reference within a predetermined network, and a transmission cycle of system information including the time information, and , A control unit (205) for setting at least one sub-transmission timing in which the main transmission timing for periodically transmitting the system information including the time information is shifted in the time axis direction, and shortened by using the first frequency resource A transmission unit (201) for notifying the system information at the determined transmission cycle and notifying the system information at the main transmission timing and the at least one sub-transmission timing using a second frequency resource; , Is provided.

A radio base station (200) according to one aspect of the present invention includes a receiving unit (203) that receives time information serving as a time reference within a predetermined network, a clock that determines the time information, and an operation of the radio base station. A control unit (205) for determining a frequency deviation ratio with respect to a reference clock and a transmission unit (201) for notifying system information including the time information and the frequency deviation ratio.

A radio base station (200) according to one aspect of the present invention, a receiving unit (203) that receives time information that is a time reference within a predetermined network, a control unit (205) that includes the time information in an RRC message, A transmission unit (201) for transmitting the RRC message to a predetermined user device (100).

A user apparatus (100) according to an aspect of the present invention includes a control unit (105) that includes a notification frequency of system information including time information serving as a time reference in a predetermined network in a message, and a radio base station (200). On the other hand, a transmitter (101) for transmitting the message, and a receiver (103) for receiving the system information from the radio base station (200) at a transmission cycle associated with the notification frequency. Prepare

A user apparatus (100) according to an aspect of the present invention includes a receiving unit (103) that periodically receives system information including time information serving as a time reference within a predetermined network from a wireless base station (200), A receiving unit (103) determines whether or not the system information is received in a predetermined cycle, and the control unit (105) has not received the system information in the predetermined cycle. When making a determination, a transmission unit (101) for notifying an error message to the predetermined network is provided.

FIG. 1 is an overall schematic configuration diagram of the network 10. FIG. 2 is a functional block configuration diagram of the UE 100. FIG. 3 is a functional block configuration diagram of gNB200. FIG. 4 is a diagram showing a flowchart of a transmission cycle setting process by the gNB 200. FIG. 5 is a diagram illustrating a setting example 1 of the transmission cycle. FIG. 6 is a diagram illustrating a second setting example of the transmission cycle. FIG. 7 is a diagram illustrating a setting example 3 of the transmission cycle. FIG. 8 is a diagram showing a flowchart of the notification process of the clock frequency deviation ratio by the gNB 200. FIG. 9 is a diagram showing a flowchart of unicast notification by the gNB 200. FIG. 10 is a diagram showing a sequence of notification processing of the notification frequency by the UE 100. FIG. 11 is a diagram showing a flowchart of error notification by the UE 100. FIG. 12 is a diagram illustrating an example of the hardware configuration of the UE 100 and the gNB 200.

Embodiments will be described below with reference to 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 Network FIG. 1 is an overall schematic configuration diagram of a network 10 according to the embodiment.

The network (predetermined network) 10 is a TSN network, and includes a TSN grand master (TSNGM) 20, an NR system 30, and an end station 40. In the network 10, a TSN control source (not shown) remotely controls the end station 40 in the production factory in real time via the NR system 30.

▽ TSNGM20 oscillates a clock for generating TSN time with high accuracy. Hereinafter, the clock oscillated by TSNGM20 is called TSN grandmaster clock (TSNGMC).

-The TSN time is the time reference within the network 10. In the network 10, in order to realize remote control in real time, it is necessary to match the time of the TSN control source and the time of the end station 40 with the TSN time.

Therefore, the TSNGM20 sends the generated TSN time to the control source of the TSN and also to the end station 40 via the NR system 30.

NR system 30 includes NR grand master (NRGM) 31, UE 100, gNB 200, and core network 300. The NR31 GM31 oscillates a clock that is the operation timing of the NR system 30. Hereinafter, the clock that NRGM31 oscillates is called the NR grand master clock (NRGMC).

UE100 executes wireless communication according to NR between UE100 and gNB200 and core network 300. The UE 100 periodically receives the system information broadcast from the gNB 200. The UE 100 transmits the TSN time included in the system information to the end station 40.

The gNB200 executes wireless communication according to NR between the gNB200 and the core network 300. The gNB 200 receives the TSN time from the core network 300.

-The gNB200 includes the received TSN time in the system information. For example, the TSN time is included in the System Information Block (SIB) 9 that notifies the time.

The gNB200 periodically notifies the UE100 of system information including TSN time at a predetermined transmission timing based on NRGMC.

Core network 300 communicates with UE 100 via gNB200. The core network 300 has a User Plane Function (UPF) 310. UPF310 provides functions specialized for U-plane processing. UPF310 receives TSN time from TSNGM20. UPF310 transmits the received TSN time to gNB200.

The end station 40 is a machine (for example, a robot arm) installed in a production factory. The end station 40 receives the TSN time from the UE 100. The end station 40 updates the TSN time held by the end station 40 as needed based on the received TSN time.

The end station 40 receives a command from the TSN control source via the NR system 30. For example, the end station 40 determines whether the TSN time held by the end station 40 reaches the predetermined TSN time based on the predetermined TSN time included in the received command and the TSN time held by the end station 40. To judge.

When the end station 40 determines that the predetermined TSN time is reached, it operates based on the received command. In this way, the TSN control source performs time scheduling for operating the end station 40 based on the TSN time, so that real-time remote control is executed in the network 10.

(2) Functional Block Configuration of UE100 Next, a functional block configuration of the UE100 will be described. Hereinafter, only the portion related to the features of this embodiment will be described. Therefore, it goes without saying that the UE 100 includes other functional blocks that are not directly related to the features of this embodiment.

FIG. 2 is a functional block configuration diagram of the UE100. The hardware configuration of UE 100 will be described later. As shown in FIG. 2, the UE 100 includes a transmitter 101, a receiver 103, and a controller 105.

The transmitting unit 101 transmits an uplink signal according to NR to the gNB 200. The transmission unit 101 transmits a command from the TSN control source and the TSN time to the end station 40.

The receiving unit 103 receives a downlink signal according to NR from the gNB 200. For example, the receiving unit 103 receives a command and system information from the control source of the TSN from the gNB 200. The receiving unit 103 receives a response signal or the like from the end station 40.

When the receiving unit 103 receives the system information including the TSN time, the control unit 105 instructs the transmitting unit 101 to transmit the TSN time to the end station 40. When receiving the command from the control source of the TSN, the control unit 105 instructs the transmission unit 101 to transmit the command to the end station 40.

The control unit 105 performs notification frequency calculation, error notification, etc., which will be described later.

(3) Functional block configuration of gNB200 Next, a functional block configuration of the gNB200 will be described. Hereinafter, only the portion related to the features of this embodiment will be described. Therefore, it goes without saying that the gNB 200 includes other functional blocks that are not directly related to the features of this embodiment.

FIG. 3 is a functional block configuration diagram of gNB200. The hardware configuration of gNB200 will be described later. As shown in FIG. 3, the gNB 200 includes a transmission unit 201, a reception unit 203, and a control unit 205.

The transmitting unit 201 transmits a command and system information from the TSN control source to the UE100.

The receiving unit 203 receives the command and the TSN time from the control source of the TSN from the core network 300.

When the receiving unit 203 receives the TSN time, the control unit 205 includes the received TSN time in the system information (for example, SIB9). The control unit 205 instructs the transmission unit 201 to periodically notify the system information at the transmission timing based on NRGMC.

The control unit 205 performs setting of a transmission cycle of system information described later, calculation of a clock frequency deviation ratio, unicast notification, notification of a plurality of TSN times, and the like.

(4) Operation of NR System Next, the operation of the NR system 30 in the network 10 will be described.

(4.1) Synchronization accuracy between UE100 and gNB200 As described above, in the network 10, in order to realize remote control in real time, the time of the TSN control source and the time of the end station 40 are set to the TSN time. Need to be adjusted to. However, if the synchronization accuracy between the TSN control source and the end station 40 is poor, a lag occurs between the TSN time of the TSN control source and the TSN time of the end station 40 as time passes. ..

Therefore, for example, it is required to suppress the synchronization accuracy between the TSN control source and the end station 40 to a synchronization deviation of about 1 μs.

On the other hand, in the NR system 30, the backhaul, which is a relay line connecting the gNB 200 and the core network 300, causes a synchronization shift of about 500 ns. Therefore, in order to meet the above request, it is necessary to suppress the synchronization accuracy between the UE 100 and the gNB 200 to a synchronization deviation of about 500 ns.

(4.1.1) Transmission cycle of system information gNB200 broadcasts TSN time using system information. However, in the gNB200, the time synchronization between the TSN GMC and the NR GMC is shifted by about 32 μs per second at the maximum when the stratum 4 clock is used.

Conventionally, the minimum transmission cycle of system information is 80 ms, so the time synchronization between TSN GMC and NR GMC is shifted by a maximum of about 2.56 μs.

Therefore, in order to suppress the synchronization accuracy between the UE 100 and the gNB 200 to a synchronization deviation of about 500 ns, it is necessary for the gNB 200 to make the system information transmission cycle shorter than the conventional minimum transmission cycle of 80 ms.

Therefore, in this embodiment, a method of setting the transmission cycle of system information to 10 ms in the gNB 200 will be described. When the transmission cycle of the system information is set to 10 ms, the time synchronization between the TSN GMC and the NR GMC in the gNB 200 can be suppressed to a maximum deviation of about 0.32 μS.

The transmission cycle of the system information depends on the synchronization accuracy between the control source of the TSN and the end station 40, the synchronization deviation in the backhaul in the NR system 30, and the synchronization accuracy between the TSNGMC and the NR GMC in the gNB200. It is determined. Therefore, the transmission cycle of system information is not limited to 10 ms.

For example, when the backhaul synchronization deviation in the NR system 30 is improved, or when the synchronization accuracy between the TSN GMC and the NR GMC in the gNB200 is increased, the system information transmission cycle can be set to a value larger than 10 ms. Is.

FIG. 4 is a diagram showing a flowchart of a transmission cycle setting process. As shown in FIG. 4, the gNB 200 receives the TSN time from the core network 300 (S11 in FIG. 4).

In this case, the gNB 200 sets the transmission cycle of the system information based on any one of the setting examples 1 to 3 described later (S13 in FIG. 4). The gNB 200 includes the TSN time in the system information and broadcasts the system information at the set transmission cycle (S15 in FIG. 4).

(4.1.1.1) Setting example 1
In Setting Example 1, the gNB 200 sets the transmission cycle by multiplying the conventional system information transmission cycle by a coefficient SF (0<SF<1). The gNB 200 broadcasts system information at the set transmission cycle.

FIG. 5 is a diagram illustrating a setting example 1 of the transmission cycle. For example, as shown in FIG. 5, the gNB 200 multiplies the minimum transmission period of 80 ms of the conventional system information by 1/8 and sets the transmission period to 10 ms.

With this setting, the gNB200 can notify the system information at the transmission timing of 10 ms intervals, that is, at the transmission cycle of 10 ms.

The gNB 200 receives a plurality of coefficient SFs from the core network 300 as a group of coefficient SFs. The gNB 200 selects an appropriate coefficient SF from the group of coefficient SFs.

The gNB200 may add the si-PeriodicitySF information element that specifies the group of coefficient SFs to the SI-SchedulingInfo information element of the SIB1 message. Thereby, gNB200 can share the group of coefficient SF between UE100 and gNB200 using a SIB1 message.

Note that gNB200 may broadcast system information in the conventional transmission cycle in addition to the set transmission cycle. Further, the gNB 200 may directly allocate 10 ms as the minimum system information transmission cycle.

(4.1.1.2) Setting example 2
In Setting Example 2, the gNB 200 sets at least one transmission timing (sub-transmission timing) obtained by shifting the transmission timing (main transmission timing) of the conventional system information transmission cycle by the offset in the time axis direction. The gNB 200 broadcasts system information at at least one set transmission timing in addition to the conventional transmission timing.

FIG. 6 is a diagram illustrating a setting example 2 of the transmission cycle. For example, as shown in FIG. 6, the gNB 200 sets the seven transmission timings by shifting the transmission timing of the conventional system information with the minimum transmission cycle of 80 ms by 10 ms.

With this setting, the gNB200 can notify the system information at the transmission timing of 10 ms intervals, that is, at the transmission cycle of 10 ms.

The gNB 200 receives a plurality of offset values OF from the core network 300 as a group of offset values OF. The offset value OF is a value that offsets the conventional transmission cycle in the time axis direction. In the example of FIG. 6, the offset value OF is 10 ms, 20 ms, 30 ms, 40 ms, 50 ms, 60 ms, and 70 ms. The gNB 200 selects at least one appropriate offset value OF from the group of offset values OF.

The gNB200 may add the si-PeriodicityOffset information element that defines the group of offset value OF to the SI-SchedulingInfo information element of the SIB1 message. Thereby, gNB200 can share the group of offset value OF between UE100 and gNB200 using a SIB1 message.

(4.1.1.3) Setting example 3
In the setting example 3, the gNB 200 broadcasts system information at the transmission cycle set by the method of the setting example 1 in the first frequency resource, and at the transmission timing set by the method of the setting example 2 in the second frequency resource. , Inform system information.

FIG. 7 is a diagram illustrating setting example 3 of the transmission cycle. For example, as shown in FIG. 7, the gNB 200 multiplies the conventional system information transmission cycle of 80 ms by 1/4 to set the transmission cycle to 20 ms.

Based on this setting, the gNB200 uses the frequency resource BWP2 to broadcast the system information at 20 ms interval transmission timing, that is, at a transmission cycle of 20 ms.

At the same time, the gNB200 sets three transmission timings by shifting the transmission timing of the conventional system information with a minimum transmission cycle of 80 ms by 20 ms.

Based on this setting, the gNB200 can broadcast the system information using the frequency resource BWP3 at the transmission timing of 20 ms intervals, that is, at the transmission cycle of 20 ms.

Note that the transmission timing of frequency resource BWP2 is 10 ms off the transmission timing of frequency resource BWP3 on the time axis.

With this setting, the gNB200 can notify the system information at the transmission timing of 10 ms intervals on the time axis, that is, at the transmission cycle of 10 ms.

Note that the frequency resource is not limited to BWP and may be a component carrier (CC).

Also, the gNB 200 may broadcast system information at a transmission cycle set by the method of setting example 1 and broadcast system information at the transmission timing set by the method of setting example 2 in one frequency resource.

(4.1.2) Clock Frequency Deviation Ratio Next, the gNB200 calculates the clock frequency deviation ratio between the TSN GMC and the NR GMC in the gNB200, and uses the TSN time and the clock frequency deviation ratio as system information. Including this, a method of notifying system information in a conventional transmission cycle will be described.

With this method, the UE 100 side can correct the time synchronization deviation between the TSN GMC and NR GMC based on the clock frequency deviation ratio. For this reason, the gNB 200 does not have to deal with the time synchronization shift between the TSN GMC and the NR GMC in the gNB 200.

FIG. 8 is a diagram showing a flowchart of the notification processing of the deviation ratio of the clock frequency by the gNB 200. As shown in FIG. 8, the gNB 200 receives the TSN time from the core network 300 (S21 in FIG. 8).

The gNB200 calculates the clock frequency shift ratio between the TSN GMC and the NR GMC in the gNB200 (S23 in FIG. 8).

Specifically, gNB200 calculates the value of cumulative scaled rate offset (CSRO), which is the protocol parameter of Generalized Precision Time Protocol (gPTP), as the deviation ratio of the clock frequency. When directly connected to TSNGM20, only the value of the neighbor ratio (NRR), which is the protocol parameter of Generalized Precision Time Protocol (gPTP), is calculated as the deviation ratio of the clock frequency.

The gNB200 includes the received TSN time and the calculated deviation ratio of the clock frequency in the system information, and notifies the system information in the conventional transmission cycle (S25 in FIG. 8).

Note that the gNB 200 may notify the UE 100 of the deviation ratio of the TSN time and the clock frequency by unicast, instead of notifying the system information. In this case, for example, the gNB 200 notifies the UE 100 of the deviation ratio of the TSN time and the clock frequency by using RRC dedicated signaling.

(4.1.3) Unicast Notification Next, a method in which the gNB200 notifies the UE100 of system information including the TSN time by unicast instead of notifying the system information including the TSN time. explain.

By this method, when the gNB 200 receives the TSN time from the core network 300, the gNB 200 can directly notify the UE 100 of the TSN time without waiting for a predetermined time (for example, a system information transmission cycle). For this reason, the gNB 200 does not have to deal with the time synchronization shift between the TSN GMC and the NR GMC in the gNB 200.

FIG. 9 is a diagram showing a flowchart of unicast notification. As shown in FIG. 9, the gNB 200 receives the TSN time from the core network 300 (S31 in FIG. 9).

The gNB200 includes the system information including the TSN time in the RRC message (S33 in Fig. 9). gNB200 transmits an RRC message to UE100 (S35 of FIG. 9).

As the RRC message, for example, RRC dedicated signaling may be used. In this case, the gNB 200 includes the system information as a container in the RRC reconfiguration message.

(4.2) Notification of Notification Frequency Next, a method in which the UE 100 notifies the gNB 200 of the notification frequency of system information will be described.

When setting the transmission cycle of the system information, the gNB 200 selects, for example, an appropriate coefficient SF from the group of coefficient SFs (setting example 1), or at least one appropriate value from the group of offset values OF. Select an appropriate offset value OF (Setting example 2).

At this time, the gNB 200 can select the coefficient SF or the offset value OF according to the notification frequency of the system information notified from the UE 100.

FIG. 10 is a diagram showing a sequence of notification processing of the notification frequency. As shown in FIG. 10, UE100 calculates the notification frequency of the system information required by UE100 (S41 of FIG. 10). UE100 notifies the notification frequency of system information to gNB200 (S43 of FIG. 10).

For example, in communication between the UE 100 and the end station 40, in order to notify how much high synchronization accuracy is required, the UE 100 is a Quality of Service (QoS) between the UE 100 and the end station 40. ), the system information request (SI request) may be notified to the gNB 200.

In communication between the UE100 and the gNB200, the UE100 notifies the system information request to the gNB200 according to the UE type in order to notify how much the system information transmission cycle can be shortened. May be.

In communication between the UE100 and the gNB200, the UE100 may notify the gNB3200 of a UE capability message including the capability of the notification frequency in order to notify the capability of the notification frequency that the UE100 can receive.

UE100 may notify the gNB200 by including the synchronization accuracy or notification frequency requested by UE100 in the UEAssistanceInformation message.

Returning to FIG. 10, the gNB 200 sets the transmission cycle of system information based on the notified notification frequency (S45 of FIG. 10). For example, the gNB 200 selects at least one of the coefficient SF and the offset value OF according to the notified notification frequency, and sets the transmission cycle of the system information.

The gNB200 broadcasts system information at the set transmission cycle (S47 in Fig. 10).

(4.3) Error Notification Next, a process in the case where the UE 100 cannot receive the system information in a required predetermined cycle will be described. FIG. 11 is a diagram showing a flowchart of error notification.

As shown in FIG. 11, the UE 100 periodically receives system information including TSN time (S51 in FIG. 11). The UE 100 determines whether or not to receive the system information at a required predetermined period (S53 of FIG. 11). When the system information is received in the predetermined cycle (S53: YES in FIG. 11), the UE 100 ends the process.

On the other hand, when the system information is not received in the predetermined cycle (S53: NO in FIG. 11), the UE100 notifies the core network 300 or the control source of the TSN of the error message via the gNB200 (S55 in FIG. 11). ).

Note that the UE 100 may notify the core network 300 or the control source of the TSN via the gNB 200 when detecting a radio link failure (Radio Link Failure: RLF).

(4.4) Notification of a plurality of TSN times Next, a method in which the gNB 200 notifies a plurality of UEs 100 of different TSN times will be described.

GNB200 notifies UE100 by including multiple TSN times in one system information. In this case, a time identifier is associated with each TSN time. When the UE 100 receives system information including a plurality of TSN times, the UE 100 selects only the TSN time associated with the time identifier previously notified from the higher layer, from the plurality of TSN times.

Note that the gNB 200 may notify each UE 100 of the corresponding TSN time by using RRC dedicated signaling.

The gNB 200 may include different TSN times in each of the plurality of system information and notify the plurality of UEs 100.

(5) Operation/Effect According to the above-described embodiment, the gNB 200 includes the receiving unit 203 that receives the TSN time serving as the time reference within the network 10, and the control unit 205 that shortens the transmission cycle of system information including the TSN time. And a transmission unit 201 that notifies system information in a shortened transmission cycle.

With such a configuration, it is possible to minimize the deviation of the time synchronization between TSN GMC and NR GMC in gNB200. Therefore, the synchronization accuracy between the TSN control source and the TSN end station can be suppressed within the allowable range required for remote control.

Therefore, the TSN control source can execute remote control of the TSN end station with higher synchronization accuracy via the NR system.

According to this embodiment, the control unit 205 shortens the transmission cycle by multiplying the transmission cycle of the system information by a coefficient smaller than 1.

With such a configuration, the transmission cycle of system information can be easily shortened.

According to the present embodiment, the gNB 200, the receiving unit 203 that receives the TSN time that is the time reference within the network 10, and the main transmission timing that periodically transmits the system information including the TSN time are shifted in the time axis direction. A control unit 205 that sets at least one sub transmission timing, and a transmission unit 201 that notifies system information at the main transmission timing and at least one sub transmission timing.

With such a configuration, it is possible to minimize the deviation of the time synchronization between TSN GMC and NR GMC in gNB200. Therefore, the synchronization accuracy between the control source of TSN and the end station of TSN can be suppressed within the allowable range required by remote control.

Therefore, the TSN control source can execute remote control of the TSN end station with higher synchronization accuracy via the NR system.

According to the present embodiment, the gNB 200, the receiving unit 203 that receives the TSN time that is the time reference in the network 10, shortens the transmission cycle of the system information that includes the TSN time, and the system information that includes the TSN time. A control unit 205 that sets at least one sub-transmission timing in which the main transmission timing that is periodically transmitted is shifted in the time axis direction, and uses the first frequency resource to notify the system information in a shortened transmission cycle. And a transmitting unit 201 that broadcasts system information at the main transmission timing and at least one sub-transmission timing using the second frequency resource.

With such a configuration, it is possible to suppress an increase in allocation of resources for transmitting system information including TSN time in one frequency resource.

According to the present embodiment, the gNB 200 is a receiving unit 203 that receives the TSN time that is the time reference in the network 10, a TSN GMC that determines the TSN time, and a clock between the NR GMC that is the operation reference of the gNB 200. A control unit 205 for determining a frequency shift ratio and a transmission unit 201 for notifying system information including the TSN time and clock frequency shift ratio are provided.

With such a configuration, the UE 100 side can correct the time synchronization deviation between the TSN GMC and the NR GMC based on the clock frequency deviation ratio. For this reason, the gNB 200 does not have to deal with the time synchronization shift between the TSN GMC and the NR GMC in the gNB 200.

According to the present embodiment, the gNB 200, the receiving unit 203 that receives the TSN time that is the time reference within the network 10, the control unit 205 that includes the TSN time in the RRC message, and the predetermined UE 100, the RRC message. And a transmitting unit 201 for transmitting.

With such a configuration, the gNB 200, when receiving the TSN time from the core network 300, directly notifies the predetermined UE 100 of the TSN time without waiting for a predetermined time (for example, a transmission cycle of system information). You can For this reason, the gNB 200 does not have to deal with the time synchronization shift between the TSN GMC and the NR GMC in the gNB 200.

According to the present embodiment, the UE 100, the notification frequency of the system information including the TSN time that is the time reference in the network 10, the control unit 105 included in the message, to the gNB200, the transmission unit 101 for transmitting the message. , GNB200, and a receiving unit 103 that receives system information in a transmission cycle associated with the notification frequency.

With such a configuration, the gNB 200 can set the transmission cycle of the system information including the TSN time according to the notification frequency of the system information notified from the UE 100. Therefore, the gNB 200 can notify the system information including the TSN time based on the capability of the UE 100.

According to the present embodiment, the UE 100 receives the system information including the TSN time serving as the time reference in the network 10, the receiving unit 103 that periodically receives from the gNB 200, and the receiving unit 103 receives the system information at a predetermined period. The control unit 105 includes a transmission unit 101 that determines whether the system information has been received, and a transmission unit 101 that notifies the network of an error message when the control unit 105 determines that the system information has not been received in a predetermined cycle.

With such a configuration, the UE 100 can notify the network that the system information including the TSN time has not been received in a predetermined cycle.

(6) Other Embodiments The contents of the present invention have been described above along with the embodiments. However, the present invention is not limited to these descriptions, and various modifications and improvements are possible. It is obvious to the trader.

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

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deemed, and notification ( Broadcasting, notifying, communicating, forwarding, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. .. For example, a functional block (component) that causes transmission to function is called a transmitter (transmitting unit) or a transmitter (transmitter). In any case, the implementation method is not particularly limited as described above.

Furthermore, the UE 100 and the gNB 200 described above may function as a computer that performs the process of the wireless communication method of the present disclosure. FIG. 12 is a diagram illustrating 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.

Note that in the following description, the word "device" can be read as a circuit, device, unit, or the like. The hardware configuration of the device may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some 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, each function in the device is such that the processor 1001 performs an arithmetic operation by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and controls communication by the communication device 1004 and a memory. It is realized by controlling at least one of reading and writing of data in the storage 1002 and the storage 1003.

The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, a register, and the like.

Further, the processor 1001 reads a program (program code), 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 part of the operations described in the above-described embodiments is used. Furthermore, 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. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via an electric communication line.

The memory 1002 is a computer-readable recording medium, and is configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), and Random Access Memory (RAM). May be done. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 may store a program (program code) capable of executing the method according to an embodiment of the present disclosure, a software module, and the like.

The storage 1003 is a computer-readable recording medium, for example, an optical disc such as a Compact Disc ROM (CD-ROM), a hard disc drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disc). At least one of a (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, or the like may be used. The storage 1003 may be called an auxiliary storage device. The above-described recording medium may be, for example, a database including at least one of the memory 1002 and the storage 1003, a server, or another appropriate medium.

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

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

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

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

Furthermore, the device is configured to include hardware such as a microprocessor, digital signal processor (DSP), Application Specific Integrated Circuit (ASIC), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA). Alternatively, some or all of the functional blocks may be implemented by the hardware. For example, processor 1001 may be implemented with at least one of these hardware.

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

Each aspect/embodiment described in the present disclosure is Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (4G). 5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)) , IEEE802.16 (WiMAX (registered trademark)), IEEE802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), at least one of the systems using appropriate systems and the next-generation system expanded based on these May be applied to one. Further, a plurality of systems may be combined and applied (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 this disclosure present elements of the various steps in a sample order, and are not limited to the specific order presented.

The specific operation that is performed by the base station in the present disclosure may be performed by its upper node in some cases. In a network composed of one or more network nodes having a base station, various operations performed for communication with a terminal include a base station and other network nodes other than the base station (eg, MME or S-GW and the like are conceivable, but not limited to these). Although the case where there is one other network node other than the base station has been described above, a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

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. The input/output information may be overwritten, updated, or added. The output information may be deleted. The input information may be transmitted to another device.

The determination may be performed by a value represented by 1 bit (whether 0 or 1), may be performed by a Boolean value (Boolean: true or false), and may be performed by comparing numerical values (for example, a predetermined value). Value comparison).

Each aspect/embodiment described in the present disclosure may be used alone, in combination, or may be switched according to execution. Further, the notification of the predetermined information (for example, the notification of “being X”) is not limited to the explicit notification, and is performed implicitly (for example, the notification of the predetermined information is not performed). Good.

Software, whether called software, firmware, middleware, microcode, hardware description language, or any other name, instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules. , Application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc. should be construed broadly.

Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the software uses a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) websites, When sent 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 technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of

Note that the terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal (signaling). The signal may also be a message. Moreover, a component carrier (Component Carrier: CC) may be called a carrier frequency, a cell, a frequency carrier, or the like.

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

Further, the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented. For example, the radio resources may be those indicated by the index.

-The names used for the above parameters are not limited in any way. Further, the formulas and the like that use these parameters may differ from those explicitly disclosed in this disclosure. Since different channels (eg PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the different names assigned to these different channels and information elements are in no way limited names. is not.

In the present 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 point" The terms "carrier", "component carrier" and the like may be used interchangeably. A base station may be referred to by terms such as macro cell, small cell, femto cell, and pico cell.

A base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (e.g., a small indoor base station (Remote Radio Radio). Head: RRH) can also provide communication services.

The term "cell" or "sector" refers to a part or the entire coverage area of at least one of the base station and the base station subsystem that provide communication services in this coverage.

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

Mobile stations are defined 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 transmission device, a reception device, a communication device, or the like. Note that 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 type or unmanned type). ). At least one of the base station and the mobile station also includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

The base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same). For example, the communication between base stations and mobile stations has been replaced with communication between multiple mobile stations (eg, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the mobile station may have the function of the base station. In addition, the wording such as “up” and “down” may be replaced with the wording corresponding to the terminal-to-terminal communication (for example, “side”). For example, the uplink channel and the downlink channel may be replaced with the 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 function of the mobile station.

The terms "connected," "coupled," or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and It can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled." The connections or connections between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”. As used in this disclosure, two elements are in the radio frequency domain, with at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-exhaustive examples. , Can be considered to be “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal can also be abbreviated as Reference Signal (RS), or may be referred to as Pilot depending on the applied standard.

As used in this disclosure, the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

Any reference to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the amount or order of those elements. These designations may be used in this 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 may be employed there, or that the first element must precede the second element in any way.

Where the terms “include”, “including” and variations thereof are used in this disclosure, these terms are inclusive, as is the term “comprising”. Is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive or.

In the present disclosure, when translations add articles, such as a,  an and the in English, the present disclosure may include that the noun that follows these articles is plural.

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”. The terms "remove", "coupled" and the like may be construed similarly as "different".

Although the present disclosure has been described in detail above, it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modified and changed modes without departing from the spirit and scope of the present disclosure defined by the description of the claims. Therefore, the description of the present disclosure is for the purpose of exemplification, and does not have any restrictive meaning to the present disclosure.

The user device described above is useful because it can transmit an uplink signal at a transmission timing that can be supported by a plurality of wireless base stations in simultaneous communication with a plurality of wireless base stations.

10 network
20 TSN GM
30 NR system
31 NR GM
40 end station
100 UE
101 Transmitter
103 Receiver
105 control unit
200 gNB
201 Transmitter
203 Receiver
205 controller
300 core network
310 UPF
1001 processor
1002 memory
1003 storage
1004 Communication device
1005 input device
1006 Output device
1007 bus

Claims (8)

1. A receiving unit that receives time information that serves as a time reference within a predetermined network;
   A control unit that shortens the transmission cycle of system information including the time information;
   A transmission unit that notifies the system information at the shortened transmission cycle,
   A radio base station including.
2. The radio base station according to claim 1, wherein the control unit shortens the transmission cycle by multiplying the transmission cycle of the system information by a coefficient smaller than 1.
3. A receiving unit that receives time information that serves as a time reference within a predetermined network;
   A control unit that sets at least one sub-transmission timing by shifting the main transmission timing that periodically transmits the system information including the time information in the time axis direction;
   A transmission unit that notifies the system information at the main transmission timing and the at least one sub transmission timing;
   A radio base station including.
4. A receiving unit that receives time information that serves as a time reference within a predetermined network;
   Control for shortening the transmission cycle of the system information including the time information and setting at least one sub transmission timing in which the main transmission timing for periodically transmitting the system information including the time information is shifted in the time axis direction. Department,
   The system information is broadcast at the shortened transmission cycle using a first frequency resource, and the system information is broadcast at the main transmission timing and the at least one sub-transmission timing using a second frequency resource. And a transmission unit that notifies
   A radio base station including.
5. A wireless base station,
   A receiving unit that receives time information that serves as a time reference within a predetermined network;
   A control unit that determines a frequency deviation ratio between a clock that determines the time information and a clock that is an operation reference of the wireless base station;
   A transmission unit for notifying system information including the time information and the frequency deviation ratio,
   A radio base station including.
6. A receiving unit that receives time information that serves as a time reference within a predetermined network;
   A control unit that includes the time information in an RRC message,
   A transmission unit that transmits the RRC message to a predetermined user device,
   A radio base station including.
7. A control unit that includes, in a message, a notification frequency of system information including time information that is a time reference within a predetermined network,
   A transmitter for transmitting the message to the radio base station,
   From the radio base station, a reception unit that receives the system information in a transmission cycle associated with the notification frequency,
   A user equipment comprising.
8. A receiving unit that periodically receives system information including time information serving as a time reference within a predetermined network from a wireless base station,
   A control unit for determining whether or not the receiving unit has received the system information in a predetermined cycle;
   When the control unit determines that the system information is not received in the predetermined cycle, the transmission unit that notifies the predetermined network of an error message,
   A user equipment comprising.

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