First wireless communication device, second wireless communication device, wireless communication system, and wireless communication method

Abstract

This first radio communication device in a radio communication system comprises: a communication unit that communicates with a second radio communication device having a survival time in which data transmission is enhanced; and a control unit that can control the allocation of radio resources for enhancing the data transmission in a frequency band and a time domain during a survival time section in which the survival time is currently applied and that, in accordance with the survival time and information related to a radio measurement section in which a radio measurement is performed in the second radio communication device, can control the setting of the radio measurement section.

Description

[Technical Field]

[0001] The present invention relates to a first wireless communication device, a second wireless communication device, a wireless communication system, and a wireless communication method. [Background technology]

[0002] 2. Description of the Related Art In recent years, wireless communication systems have come into use, including in facilities such as factories.

[0003] In a factory, for example, manufacturing machines and equipment are wirelessly connected to a control and monitoring system, and data and control signals are sent and received using the Internet of Things (IoT). The IoT used in factories is sometimes called the Industrial IoT (IIoT).

[0004] In a factory, if a control signal is not received, for example, a serious error may occur, causing the factory's production line to stall or stop, so the IIoT may require stricter delay and error conditions than regular IoT. Therefore, in the IIoT, communication devices transition to a state (hereinafter sometimes referred to as survival time mode (STM)) in which data is required to arrive within the packet arrival deadline (hereinafter sometimes referred to as survival time) that the system can tolerate, assuming that certain conditions are met, thereby improving the probability of data arrival.

[0005] Technologies related to IIoT are described in the following prior art documents. [Prior art documents] [Non-patent literature]

[0006] [Non-patent document 01] 3GPP TS36.133 LTE-A Radio Measurement Specification [Non-patent document 02] 3GPP TS36.300 LTE-A Overview Specifications [Non-patent document 03] 3GPP TS36.211 LTE-A PHY Channel Specification [Non-patent document 04] 3GPP TS36.212 LTE-A PHY Coding Specification [Non-patent document 05] 3GPP TS36.213 LTE-A PHY Procedure Specification [Non-patent document 06] 3GPP TS36.214 LTE-A PHY Measurement Specification [Non-patent document 07] 3GPP TS36.321 LTE-A MAC Specification [Non-patent document 08] 3GPP TS36.322 LTE-A RLC Specification [Non-patent document 09] 3GPP TS36.323 LTE-A PDCP Specification [Non-Patent Document 10] 3GPP TS36.331 LTE-A RRC Specification [Non-Patent Document 11] 3GPP TS36.413 LTE-A S1 Specification [Non-Patent Document 12] 3GPP TS36.423 LTE-A X2 Specification [Non-Patent Document 13] 3GPP TS36.425 LTE-A Xn Specification [Non-Patent Document 14] 3GPP TR36.912 NR Radio Access Overview [Non-Patent Document 15] 3GPP TR38.913 NR Requirements [Non-Patent Document 16] 3GPP TR38.913 NR Requirements [Non-Patent Document 17] 3GPP TR38.801 NR Network Architecture Overview [Non-Patent Document 18] 3GPP TR38.802 NR PHY Overview [Non-Patent Document 19] 3GPP TR38.803 NR RF Overview [Non-Patent Document 20] 3GPP TR38.804 NR L2 Overview [Non-Patent Document 21] 3GPP TR38.900 NR High Frequency Overview [Non-Patent Document 22] 3GPP TS38.300 NR Overview Specifications [Non-Patent Document 23] 3GPP TS37.340 NR Multiple Access Overview Specification [Non-Patent Document 24] 3GPP TS38.201 NR PHY Specification Overview [Non-Patent Document 25] 3GPP TS38.202 NR PHY Service Overview Specification [Non-Patent Document 26] 3GPP TS38.211 NR PHY Channel Specification [Non-Patent Document 27] 3GPP TS38.212 NR PHY Coding Specification [Non-patent document 28] 3GPP TS38.213 NR PHY Data Channel Procedure Specification [Non-Patent Document 29] 3GPP TS38.214 NR PHY Control Channel Procedure Specification [Non-Patent Document 30] 3GPP TS38.215 NR PHY Measurement Specification [Non-Patent Document 31] 3GPP TS38.321 NR MAC Specification [Non-Patent Document 32] 3GPP TS38.322 NR RLC Specification [Non-Patent Document 33] 3GPP TS38.323 NR PDCP Specification [Non-Patent Document 34] 3GPP TS37.324 NR SDAP Specification [Non-Patent Document 35] 3GPP TS38.331 NR RRC Specification [Non-Patent Document 36] 3GPP TS38.401 NR Architecture Overview Specification [Non-Patent Document 37] 3GPP TS38.410 NR Core Network Overview Specification [Non-Patent Document 38] 3GPP TS38.413 NR Core Network AP Specification [Non-Patent Document 39] 3GPP TS38.420 NR Xn Interface Overview Specification [Non-Patent Document 40] 3GPP TS38.423 NR XnAP Specification [Non-Patent Document 41] 3GPP TS38.470 NR F1 Interface Overview Specification [Non-Patent Document 42] 3GPP TS38.473 NR F1AP Specification [Non-Patent Document 43] 3GPP TSG RAN meeting #92e Electronic Meeting, June 14 - 18, 2021 RP-211566 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in a communication device in survival mode, means and methods for improving the probability of data arriving within the survival time are currently under discussion and have not yet been determined.

[0008] Therefore, one disclosure provides a first wireless communication device, a second wireless communication device, a wireless communication system, and a wireless communication method that improve the probability of data arrival in a survival time mode of the IIoT. [Means for solving the problem]

[0009] A first wireless communication device in a wireless communication system includes a communication unit that communicates with a second wireless communication device having a survival time in which data transmission is enhanced, and a control unit that can control the allocation of wireless resources that enhance data transmission in the frequency band and time domain in a survival time mode (section) in which the survival time is applied, and can control the setting of the wireless measurement section in accordance with information regarding the wireless measurement section in which wireless measurement is performed in the second wireless communication device and the survival time. [Effects of the Invention]

[0010] One disclosure can improve the probability of data arrival in survival time mode of IIoT. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system 1. As shown in FIG. [Figure 2] FIG. 2 is a diagram illustrating an example of a wireless communication system 10. [Figure 3] FIG. 3 illustrates an example of the configuration of the base station device 200. As shown in FIG. [Figure 4] FIG. 4 is a diagram illustrating an example of the configuration of the terminal device 100. As shown in FIG. [Figure 5] FIG. 5 is a diagram showing an example of the survival mode. [Figure 6] FIG. 6 is a diagram illustrating an example of increasing radio resources in the frequency domain. [Figure 7] FIG. 7 is a diagram showing an example (pattern 1) of increasing radio resources in the time domain. [Figure 8] FIG. 8 is a diagram showing an example (pattern 2) of increasing radio resources in the time domain. [Figure 9] FIG. 9 is a diagram showing an example (pattern 3) of increasing radio resources in the time domain. [Figure 10] FIG. 10 is a diagram showing an example of whether MG is performed when the MG period is longer than the transmission interval. [Figure 11]FIG. 11 is a diagram showing an example of whether MG is performed when the MG period is shorter than the transmission interval. [Figure 12] FIG. 12 is a diagram showing an example of MG implementation when the MG period is shorter than the transmission interval. DETAILED DESCRIPTION OF THE INVENTION

[0012] [First embodiment] A first embodiment will be described.

[0013] The wireless communication system 1 is a communication system that supports survival time. A section (period) that supports survival time may be called a survival time mode (section). The wireless communication system 1 includes a first wireless communication device 2 and a second wireless communication device 7. The first wireless communication device 2 and the second wireless communication device 7 support survival time and perform wireless communication with each other.

[0014] The first wireless communication device 2 is a communication device having a control unit 3 and a communication unit 4. The control unit 3 and the communication unit 4 are constructed, for example, by a processor (computer) included in the first wireless communication device 2 executing a program loaded into a memory.

[0015] The control unit 3 can control allocation of radio resources for the second wireless communication device 7 to transmit data to the first wireless communication device 2. When the second wireless communication device 7 transitions to the survival time mode (section), the control unit 3 increases data transmission by adding or changing the allocation of radio resources in the frequency band and time domain (S1). For example, the control unit 3 allocates radio resources of a different frequency band or time domain from the radio resources used in normal times (sections other than the survival time mode (section)) as radio resources to be used by the second wireless communication device 7 for data transmission. For example, the control unit 3 performs control to increase transmission power or control to make it easier for data to reach the wireless communication device 2.

[0016] Furthermore, the control unit 3 controls the setting of a wireless measurement period in the second wireless communication device 7 (S2). The second wireless communication device 7 performs wireless measurement at a predetermined timing. The period (duration) during which the wireless measurement is performed is called a wireless measurement period. Wireless measurement is, for example, a process of searching for a communication device (or a frequency band) other than the first wireless communication device 2 (or a serving frequency band) with which the second wireless communication device 7 is in communication. There are cases in which the second wireless communication device 7 is unable to transmit or receive data to or from the first wireless communication device 2 during the wireless measurement period. For example, the control unit 3 controls the second wireless communication device 7 not to perform wireless measurement in a survival time mode (period). Note that the control unit 3 controls the setting of the wireless measurement period according to information 5 related to the wireless measurement period and survival time 6 (for example, the required time until data arrives).

[0017] The second wireless communication device 7 is a communication device having a second control unit 8 and a second communication unit 9. The second control unit 8 and the second communication unit 9 are constructed, for example, by a processor (computer) included in the second wireless communication device 7 executing a program loaded into a memory.

[0018] The second control unit 8 controls wireless communication in accordance with the control of the first wireless communication device 2. Furthermore, when the second control unit 8 recognizes that data has not arrived N times (N is an integer equal to or greater than 1), for example, it transitions to a survival time mode (section).

[0019] The communication unit 4 and the second communication unit 9 perform wireless communication. The communication unit 4 performs wireless communication in accordance with the control unit 3. The second communication unit 9 performs wireless communication in accordance with the second control unit 8.

[0020] The first wireless communication device 2 can improve the probability of data arrival by controlling the allocation of wireless resources that enhance data transmission in the frequency band and time domain in the survival time mode (section) of the second wireless communication device 7. Furthermore, the first wireless communication device 2 can control the setting of the wireless measurement section in accordance with the information on the wireless measurement section and the survival time, thereby controlling so as not to interfere with data transmission in the survival time mode (section).

[0021] [Second embodiment] A second embodiment will be described.

[0022] <About the wireless communication system 10> 2 is a diagram showing an example of the configuration of a wireless communication system 10. The wireless communication system 10 includes a base station device 200 and a terminal device 100. The wireless communication system 10 is, for example, a wireless communication system installed within a system. For example, the wireless communication system 10 is a wireless communication system having an IIoT function.

[0023] The terminal device 100 is a communication device attached to equipment (device) within the system. The base station device 200 is a communication device installed within the system.

[0024] The base station device 200 supports, for example, various communication generations (for example, 5G and Beyond 5G). The base station device 200 may be configured as a single device or may be configured as multiple devices such as a CU (Central Unit) and a DU (Distributed Unit).

[0025] In the wireless communication system 10, the base station device 200 and the terminal device 100 communicate using the IIoT. The terminal device 100 and the base station device 200 are assumed to support survival time.

[0026] <Configuration Example of Base Station Device 200> 3 is a diagram illustrating an example of the configuration of the base station device 200. The base station device 200 includes a CPU (Central Processing Unit) 210, a storage 220, a memory 230, a wireless communication circuit 250, and an antenna 251.

[0027] The storage 220 is an auxiliary storage device that stores programs and data, such as a flash memory, a hard disk drive (HDD), or a solid state drive (SSD). The storage 220 stores a communication program 221 and a control program 222.

[0028] The memory 230 is an area into which the programs stored in the storage 220 are loaded. The memory 230 may also be used as an area in which the programs store data.

[0029] The wireless communication circuit 250 is a device that performs wireless communication with the terminal device 100. The wireless communication circuit 250 has an antenna 251. The antenna 251 includes, for example, a directional antenna that can control the direction of transmission and reception of radio waves.

[0030] The CPU 210 is a processor that loads a program stored in the storage 220 into the memory 230, executes the loaded program, configures each unit, and realizes each process.

[0031] The CPU 210 executes the communication program 221 to establish a communication unit and perform communication processing. The communication processing is processing for performing wireless communication with the terminal device 100. In the communication processing, the base station device 200 establishes a wireless connection with the terminal device 100, transmits data and control signals to the terminal device 100, and receives data from the terminal device 100.

[0032] The CPU 210 executes the control program 222 to construct a control unit and perform control processing. The control processing is processing for controlling wireless communication with the terminal device 100. In the control processing, the base station device 200 performs allocation control of wireless resources used by the terminal device 100 in the survival time mode (section) (for example, allocation of augmented resources, instruction to cancel wireless resources used in normal times, increase of transmission power, control to make it easier for data to reach, etc.). In addition, in the control processing, the base station device 200 performs implementation control (instruction on whether to perform and the timing of implementation, etc.) of wireless section measurements (for example, Measurement Gap, hereinafter sometimes referred to as MG) performed by the terminal device 100.

[0033] The CPU 210 executes the survival time mode allocation control module 2221 of the control program 222 to configure a control unit and perform survival time mode allocation control processing. The survival time mode allocation control processing is processing for controlling allocation of radio resources used by the terminal device 100 in survival time mode. In the survival time mode allocation control processing, the base station device 200 enhances radio resources (data transmission), for example, in at least one of the frequency band and the time domain. For example, control is performed to increase transmission power or to make it easier for data to reach the base station device 200.

[0034] The CPU 210 executes the MG control module 2222 of the control program 222 to establish a control unit and perform MG control processing. The MG control processing is processing for controlling whether or not a measurement gap is performed in the terminal device 100. In the MG control processing, the base station device 200 does not perform a measurement gap, for example, in the survival time mode.

[0035] <Configuration example of terminal device 100> 4 is a diagram illustrating an example of the configuration of the terminal device 100. The terminal device 100 includes a CPU 110, a storage 120, a memory 130, a wireless communication circuit 150, and an antenna 151.

[0036] The storage 120 is an auxiliary storage device such as a flash memory, HDD, or SSD that stores programs and data. The storage 120 stores a terminal communication program 121 and a terminal control program 122.

[0037] The memory 130 is an area into which the programs stored in the storage 120 are loaded. The memory 130 may also be used as an area in which the programs store data.

[0038] The wireless communication circuit 150 is a device that performs wireless communication with the base station device 200. The wireless communication circuit 150 has an antenna 151. The antenna 151 includes, for example, a directional antenna that can control the direction of transmission and reception of radio waves.

[0039] The CPU 110 is a processor that loads a program stored in the storage 120 into the memory 130, executes the loaded program, configures each unit, and realizes each process.

[0040] The CPU 110 establishes a second communication unit and performs terminal communication processing by executing the terminal communication program 121. The terminal communication processing is processing for performing wireless communication with the base station device 200.

[0041] The CPU 110 executes the survival time mode module 1211 included in the terminal communication program 121 to configure a second communication unit and a second control unit and perform survival time mode processing. The survival time mode processing is processing for performing communication in the survival time mode. In the survival time mode, the terminal device 100 uses radio resources (including enhanced radio resources) allocated to the base station device 200 and transmits data under control (such as an increase in the transmission power of the data) that makes it easier for given data to reach the base station device 200.

[0042] The CPU 110 executes the terminal control program 122 to establish a second control unit and perform terminal control processing. The terminal control processing is processing in which communication is controlled by the base station device 200, for example.

[0043] The CPU 110 executes the MG module 1221 of the terminal control program 122 to establish a second control unit and perform MG processing. The MG processing is processing that MG executes (or does not execute) in accordance with an instruction from the base station device 200. For example, in the MG processing, the terminal device 100 does not execute (or postpones or puts on hold) MG in accordance with an instruction from the base station device 200 during the survival time mode.

[0044] <Survival Time Mode> Fig. 5 is a diagram showing an example of survival mode. A terminal device 100 in a wireless communication system 10 in Fig. 5 transmits data to a base station device 200. The terminal device 100 transmits data (or acquires an opportunity to transmit data) at intervals of, for example, 0.5 ms. In Fig. 5, the transmission intervals are indicated by black squares.

[0045] When the terminal device 100 recognizes that data transmission has failed N times (N is an integer equal to or greater than 1), it transitions to survival time mode. Note that in FIG. 5, N is 1, and the terminal device 100 recognizes that data transmission has failed by receiving a NACK (Non Acknowledgement). Although the term "NACK" is used here for convenience, more specifically, it is a control signal of the physical layer (L1). In 5G, it corresponds to a UL grant that prompts retransmission. However, it is not limited to this. Any control signal for transitioning to survival mode will do.

[0046] The terminal device 100 transmits data D1 to the base station device 200 (S10). The base station device 200 successfully receives the data D1 and transmits an ACK (Acknowledgement) indicating successful reception of the data D1 to the terminal device 100 (S11). Note that, depending on the wireless communication system, an ACK may not be returned. In this case, the terminal device 100 recognizes that the data transmission was successful by, for example, not receiving a NACK for a predetermined time.

[0047] The terminal device 100 transmits data D2 to the base station device 200 (S12). The base station device 200 fails to receive data D2 and transmits a NACK indicating that reception of data D2 has failed to the terminal device 100 (S13). The terminal device 100 receives the NACK, and transitions to the survival time mode because it has received NACK a predetermined number of times.

[0048] The survival time mode may end after a predetermined time, or may end depending on the number of successful data transmissions, or when the wireless conditions improve to a predetermined level.

[0049] In the survival time mode, the terminal device 100 reinforces the radio resources to be used. Hereinafter, the radio resources reinforced in the survival mode may be referred to as reinforced radio resources. The reinforcement patterns are shown below.

[0050] <Frequency domain enhancement> Fig. 6 is a diagram showing an example of enhancing radio resources in the frequency domain. In Fig. 6, CC1 and CC2 are assumed to have different frequency bands. Note that CC2 is, for example, a radio resource agreed upon in advance between the terminal device 100 and the base station device 200 (or allocated by an RRC control signal).

[0051] The terminal device 100 uses the radio resources of CC1 to transmit data to the base station device 200 (S20). If the base station device 200 fails to receive the data, it transmits a NACK indicating that the data reception has failed to the terminal device 100 (S21). The terminal device 100 receives the NACK, and transitions to the survival time mode because it has received NACKs a predetermined number of times.

[0052] The terminal device 100 uses, as augmented radio resources, radio resources R21, R22, and R23 of CC2 that are on the same time axis as the radio resources that have transmitted data (and / or are scheduled to transmit data in the future).

[0053] The terminal device 100 retransmits data or transmits new data using radio resources that are also used in modes other than the survival time mode and the augmented radio resource R21 (S22, S23). Note that the data transmitted here may be, for example, a retransmission of data that was the target of NACK, or may be different data. Furthermore, the same data or different data may be transmitted on the radio resources of CC1 and CC2, respectively.

[0054] <Time domain enhancement pattern 1> FIG. 7 is a diagram showing an example (pattern 1) of increasing radio resources in the time domain.

[0055] The terminal device 100 uses the radio resources of CC1 to transmit data to the base station device 200 (S30). If the base station device 200 fails to receive the data, it transmits a NACK indicating that the data reception has failed to the terminal device 100 (S31). The terminal device 100 receives the NACK, and transitions to the survival time mode because it has received NACKs a predetermined number of times.

[0056] The terminal device 100 uses, as the augmented radio resources, radio resource R31 of CC2, which is on the same time axis as the radio resource that transmitted (or / and is scheduled to transmit) data, and radio resource R32 and R33, which are on different time axes.

[0057] The terminal device 100 uses radio resources that are also used in modes other than the survival time mode and the augmented radio resources R31, R32, and R33 to retransmit data or transmit new data (S32, S33, S34, S35).

[0058] As a means for increasing radio resources in the time domain, for example, repetition Type A / Type B is applied to the PUSCH. Repetition Type A is a technique for repeatedly transmitting data in slot units, and repetition Type B is a technique for repeatedly transmitting data within one slot.

[0059] Another method for increasing radio resources in the time domain is to use the TBOMS pre-setting. By utilizing the TBOMS function, for example, one TB corresponding to the data to be transmitted can be transmitted across multiple slots.

[0060] 7, the terminal device 100 allocates the enhanced radio resources R32 and R33 to CC2, which has a different frequency band, but the enhanced radio resources R32 and R33 may also be allocated to CC1, which has the same frequency. However, since it is assumed that the base station device 200 controls multiple terminal devices 100, there are cases where CC1 is also used by other terminal devices 100, for example. In this case, the base station device 200 controls the terminal device 100 so that the enhanced radio resources R32 and R33 of CC1 are exclusively used by the terminal device 100, for example, by restricting or canceling the use of CC1 by the other terminal devices 100.

[0061] 7, the number of enhanced radio resources is three resources R31, R32, and R33, but it may be fewer or more. The number of enhanced radio resources is instructed, for example, by the base station device 200. For example, an RRC message, broadcast information, or the like is used to specify the maximum number of times in advance. The terminal device 100 allocates the enhanced radio resources within the specified maximum number of times. Furthermore, the base station device 200 may instruct the terminal device 100 of the number of enhanced radio resources at the timing of transitioning to the survival time mode (for each survival time mode), for example, by including the number of enhanced radio resources this time in a NACK, within the maximum number of times specified in advance.

[0062] <Time domain enhancement pattern 2> FIG. 8 is a diagram showing an example (pattern 2) of augmenting radio resources in the time domain. Data transmission using the augmented radio resources is omitted in FIG. 8. When the terminal device 100 has a surplus in the transmission power, the transmission timing of the normal radio resources and the augmented radio resources R31 may overlap as in pattern 1. However, when the terminal device 100 does not have a surplus in the transmission power, if the transmission timing of the normal radio resources and the augmented radio resources R31 overlap as in pattern 1, the transmission output of at least one of them will be low, and there may be cases where the normal radio resources do not reach the base station device 200 with a sufficient amount of power. Therefore, in pattern 2, the terminal device 100 prevents the time domains of the normal radio resources and the augmented radio resources from overlapping.

[0063] The terminal device 100 uses the radio resources of CC1 to transmit data to the base station device 200 (S40). If the base station device 200 fails to receive the data, it transmits a NACK indicating that the data reception has failed to the terminal device 100 (S41). The terminal device 100 receives the NACK, and transitions to the survival time mode because it has received NACKs a predetermined number of times.

[0064] The terminal device 100 does not use, as an augmenting radio resource, the radio resource R41, which is a radio resource of CC2 and is on the same time axis as the radio resource that has transmitted data (and / or is scheduled to transmit data in the future).

[0065] Then, the terminal device 100 uses R42 and R43, which have a different time axis from the radio resource that has transmitted data (and / or is scheduled to transmit data in the future), as the augmented radio resource.

[0066] In this way, the terminal device 100 allocates radio resources that do not overlap in the time domain as enhanced radio resources.

[0067] <Time domain enhancement pattern 3> Fig. 9 is a diagram showing an example (pattern 3) of augmenting radio resources in the time domain. Data transmission using the augmented radio resources is omitted in Fig. 9. In pattern 2, the terminal device 100 does not allocate augmented radio resources that overlap with normal radio resources in the time domain, but in pattern 3, it allocates augmented radio resources that overlap with normal radio resources in the time domain and cancels the normal radio resources.

[0068] The terminal device 100 uses the radio resources of CC1 to transmit data to the base station device 200 (S50). If the base station device 200 fails to receive the data, it transmits a NACK indicating that the data reception has failed to the terminal device 100 (S51). The terminal device 100 receives the NACK, and transitions to the survival time mode because it has received NACKs a predetermined number of times.

[0069] The terminal device 100 uses, as the augmenting radio resources, radio resource R51 of CC2, which is on the same time axis as the radio resource that transmitted (or / and is scheduled to transmit) data, and radio resource R52 and R53, which are on different time axes.

[0070] On the other hand, the terminal device 100 cancels (does not use) the normal radio resource. The normal radio resource is the radio resource of CC1, which is the radio resource of the frequency band in which NACK was previously received, so there are cases in which the probability of data arrival is improved by using CC2.

[0071] <Regarding the relationship with Measurement Gap> In addition to the reception quality from the currently communicating cell (base station device), Measurement Gap measures the reception quality of radio signals in a band that has the same serving frequency but is different from the current band, or the reception quality of radio signals from other frequency bands or different RATs, or indicates the measurement period and control. When the radio communication circuit (RF system) used for MG and the radio communication circuit (RF system) used for communication in the terminal device 100 are the same, during MG, data cannot be transmitted and received with the currently communicating base station device 200. Therefore, in the radio communication system 10, it is necessary to control MG, including whether to implement it in the survival time mode.

[0072] Figure 10 is a diagram showing an example of whether to implement MG when the MG period is longer than the transmission interval. In Figure 10, the MG period is 1.5 ms, and the transmission period is 0.5 ms. It is assumed that the transmission period is the same value as the survival time.

[0073] As shown in Figure 10, when the terminal device 100 implements MG during the survival time mode, it cannot transmit data to the base station device 200 during the 1.5 ms of the MG period. Therefore, when the MG period is longer than the survival time (transmission period), the terminal device 100 does not implement MG.

[0074] When not implementing MG, for example, prepare an RF system for Inter - BWP / Inter - F / Inter - RAT separately.

[0075] Figure 11 is a diagram showing an example of whether to implement MG when the MG period is shorter than the transmission interval. In Figure 11, the MG period is 1.5 ms, and the transmission period is 2.0 ms.

[0076] 11, even if the terminal device 100 performs MG during the survival time mode, data transmission is not possible during the MG period of 1.5 ms, but data can be transmitted to the base station device 200 during the time when MG is not being performed. Therefore, the terminal device 100 performs MG when the MG period is shorter than the survival time (transmission cycle). Furthermore, whether or not to perform MG when the MG period is shorter than the survival time may be determined according to an instruction from the base station device 200, or may be optional, for example.

[0077] 12 is a diagram showing an example of MG implementation when the MG period is shorter than the transmission interval. In FIG. 12, the MG period is 1.5 ms and the transmission cycle is 2.0 ms.

[0078] The terminal device 100 transmits data to the base station device 200 (S60). If the base station device 200 fails to receive the data, it transmits a NACK indicating that the data reception has failed to the terminal device 100 (S61). The terminal device 100 receives the NACK, and transitions to the survival time mode because it has received NACKs a predetermined number of times.

[0079] 12, when the difference between the survival time and the MG period is small, the period T60 during which the terminal device 100 can transmit data after receiving a NACK is only 0.5 ms (transmission interval - MG period) at most, and data may not be transmitted or may not be retransmitted a sufficient number of times. Therefore, when the time T60 is shorter than a predetermined time (first time) (or there is no time condition), the MG may be canceled or shifted. When shifting, the timing to execute the MG later may be, for example, in response to an instruction from the base station device 200 or when the survival time mode ends.

[0080] Furthermore, in the case of a wireless communication system that transmits ACK, the terminal device 100 may end the survival time mode at the timing of receiving ACK, and execute the MG that has been shifted (canceled).

[0081] Furthermore, the terminal device 100 that supports the survival time may not implement MG or may be configured in advance not to execute MG. Such a terminal device may notify the base station device 200 that the terminal supports the survival time using an RRC control signal.

[0082] [Other embodiments] The requirements described in the first, second, and other embodiments may be combined with each other, and may be used in different ways depending on, for example, wireless conditions, system requirements, etc.

[0083] The requirements described in the first and second embodiments and other embodiments are defined as standard specifications in 3GPP, for example, as follows:

[0084] 3GPP TS38.331 (RRC) describes that time domain repetition should be set only for boosted (augmented) CG (configured grant-based) resources.

[0085] 3GPP TS38.306 (UE capability) should state that MG will not be configured (MG will not be implemented) for UE (terminal equipment) that supports a survival time of 0.5 ms / 1 ms. The survival time of "0.5 ms / 1 ms" is set because it is assumed that the time is shorter than the minimum MG time of "1.5 ms." In reality, UE that does not configure MG only needs to support a survival time shorter than the MG period. 3GPP TS38.306 (UE capability) should state, for example, "shall not support measurement gap" or "is not required to support measurement gap" for the relevant UE.

[0086] On the other hand, in the case of a UE that supports a survival time of 2.0 ms (when the survival time is longer than the MG period), the fact that the UE can support MG is described in 3GPP TS38.306 (UE capability). For example, in 3GPP TS38.306 (UE capability), for a UE that supports a survival time of 2.0 ms, "can support measurement gap" is described.

[0087] Furthermore, 3GPP TS38.306 (UE capability) may state that MG is not configured for UEs that support survival time. In this case, 3GPP TS38.306 (UE capability) may state "shall not support measurement gap" or "is not required to support measurement gap" for UEs that support survival time.

[0088] 3GPP TS38.321 (MAC specification) should state that in survival time mode, PUSCH transmission is permitted even during MG. 3GPP TS38.321 (MAC specification) should state, for example, "MAC entity shall transmit PUSCH regardless of the possible occurrence of a measurement gap." [Explanation of symbols]

[0089] 1: Wireless communication system 2: First wireless communication device 3: Control section 4: Communications Department 7: Second wireless communication device 8: Second control section 9: Second Communication Department 10: Wireless communication system 100: Terminal device 110:CPU 120: Storage 121: Terminal communication program 1211: Survival Time Mode Module 122: Terminal control program 1221:MG module 130: Memory 150: Wireless communication circuit 151: Antenna 200:Base station equipment 210:CPU 220: Storage 221: Communication Program 222: Control program 2221: Survival time mode allocation control module 2222:MG control module 230: Memory 250: Wireless communication circuit 251: Antenna

Claims

1. A first wireless communication device in a wireless communication system, a communication unit that communicates with a second wireless communication device having a survival time; In the survival time mode during which the survival time is applied, control can be performed so that radio resources different from radio resources available in a state other than the survival time mode are allocated as radio resources for data transmission in a frequency band and a time domain; a control unit that controls setting of the radio measurement period in accordance with information about a radio measurement period in which radio measurement is performed in the second radio communication device and the survival time; A first wireless communication device having:

2. The wireless measurement section is a section in which communication with the second wireless communication device is not required. The first wireless communication device according to claim 1 .

3. The control unit controls the second wireless communication device to perform the wireless measurement when the wireless measurement period is equal to or shorter than the survival time. The first wireless communication device according to claim 2 .

4. The control unit controls the second wireless communication device not to perform the wireless measurement when the wireless measurement period is longer than the survival time. The first wireless communication device according to claim 3 .

5. The control unit controls the second wireless communication device to perform the wireless measurement when the wireless measurement period is longer than the survival time and when a difference between the wireless measurement period and the survival time is equal to or less than a first time. The first wireless communication device according to claim 3 .

6. when the control unit fails to receive data from the second wireless communication device, it transmits to the second wireless communication device a signal that allows the second wireless communication device to recognize the failure of the data reception; Transitioning the second wireless communication device to the survival time period. The first wireless communication device according to claim 1 .

7. The control unit does not allocate, as the radio resource to be reinforced in the survival time period, a radio resource whose time domain overlaps with a radio resource used outside the survival time period. The first wireless communication device according to claim 1 .

8. The control unit determines whether to allocate, in the survival time mode, as the radio resource, a radio resource whose time domain overlaps with a radio resource used in a mode other than the survival time mode, according to transmission power. The first wireless communication device according to claim 1 .

9. The control unit does not use, for data transmission, radio resources to be used outside the survival time period during the survival time period. The first wireless communication device according to claim 1 .

10. The wireless measurement interval is a Measurement Gap. The first wireless communication device according to claim 1 .

11. The survival time is a data transmission interval of the second wireless communication device. The first wireless communication device according to claim 1 .

12. 1. A wireless communication method in a first wireless communication device of a wireless communication system, comprising: a communication step of communicating with a second wireless communication device having a survival time; a control step of controlling, in a survival time mode during which the survival time is applied, allocation of radio resources different from radio resources usable in a state other than the survival time mode as radio resources for data transmission in a frequency band and a time domain, and controlling setting of the radio measurement period in accordance with information on a radio measurement period in which radio measurement is performed in the second wireless communication device and the survival time; A wireless communication method comprising:

13. A second wireless communication device having a survival time in a wireless communication system, a second communication unit that communicates with the first wireless communication device; In the survival time mode during which the survival time is applied, radio resources different from radio resources usable in a state other than the survival time mode are allocated by the first radio communication device as radio resources for data transmission in a frequency band and a time domain; a second control unit that is controlled by the first wireless communication device to set the wireless measurement section in accordance with information about the wireless measurement section in which wireless measurement is performed and the survival time; a second wireless communication device having:

14. A wireless communication system having a first wireless communication device and a second wireless communication device having a survival time, the first wireless communication device, a communication unit that communicates with the second wireless communication device; In the survival time mode during which the survival time is applied, control can be performed so that radio resources different from radio resources available in a state other than the survival time mode are allocated as radio resources for data transmission in a frequency band and a time domain; a control unit that controls setting of the radio measurement period in accordance with information about a radio measurement period in which radio measurement is performed in the second radio communication device and the survival time; and the second wireless communication device, a second communication unit that communicates with the first wireless communication device; In the survival time mode, using the radio resources allocated by the first radio communication device for the communication; a second control unit that executes the radio measurement in accordance with control from the first wireless communication device; have Wireless communication system.

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