Terminal device, base station device, and wireless communication system

Abstract

A terminal device according to the present invention includes a controller and a transmitter. The controller receives a first signal that is a signal for measurement that is transmitted from a base station device and performs control to measure the received first signal. The controller also performs control to set a prescribed interval from start timing that is the reception timing of the first signal as an occupancy interval for a processing unit that is for performing transmission processing on the measurement information. When an opportunity for transmission of the measurement information is detected, the transmitter transmits a second signal that includes the measurement information to the base station device.

Description

Terminal device, base station device, and wireless communication system

[0001] The present invention relates to a terminal device, a base station device, and a wireless communication system.

[0002] In today's networks, traffic from mobile devices (smartphones and feature phones) accounts for the majority of network resources, and traffic from mobile devices is expected to continue to grow.

[0003] In addition to traffic used by mobile terminals, for example, IoT (Internet of Things) services (for example, monitoring systems for transportation systems, smart meters, devices, etc.) are being deployed. Therefore, networks are required to support services with diverse requirements. In order to support such diverse services, for example, in communication standards for fifth-generation mobile communications (5G or NR (New Radio)) (for example, Non-Patent Documents 1 to 14), standards are being developed assuming support for many use cases classified as eMBB (Enhanced Mobile Broadband), Massive MTC (Machine Type Communications), and URLLC (Ultra-Reliable and Low Latency Communications).

[0004] In addition, in the working group of the 3rd Generation Partnership Project (3GPP (registered trademark)), an international standardization project, extension technologies for the above communication standards are currently being continuously studied and standardized.

[0005] For example, in order to reduce overhead and delay in beam management, a working group of 3GPP is studying a method of reporting beam information initiated by a terminal device or reporting beam information driven by an event (Non-Patent Document 15). This is a method in which a terminal device monitors a reference signal and transmits a beam report to a base station device when a condition for a beam report is met.

[0006] Non-Patent Document 8 defines a CPU (CSI Processing Unit) occupation duration for a terminal device to report CSI (Channel State Information). The CPU occupation duration is, for example, a period during which a predetermined number of units used for one CSI report are occupied from CSI measurement to transmission of the CSI report. Note that the number of CSIs that can be simultaneously calculated by a terminal device is determined. Therefore, for example, when multiple CSI reports are configured and a number of units exceeding the number of CSIs that can be simultaneously calculated are required, the terminal device controls so as not to transmit CSI reports with a low priority.

[0007] 3GPP TS 37.324 V17.0.03GPP TS 37.340 V18.0.03GPP TS 38.201 V18.0.03GPP TS 38.202 V18.1.03GPP TS 38.211 V18.1.03GPP TS 38.212 V18.1.03GPP TS 38.213 V18.1.03GPP TS 38.214 V18.1.03GPP TS 38.215 V18.1.03GPP TS 38.300 V18.0.03GPP TS 38.321 V18.0.03GPP TS 38.322 V18.0.03GPP TS 38.323 V18.0.03GPP TS 38.331 V18.0.0RP-234007

[0008] However, there is a possibility that the current definition of the CPU occupation period cannot be applied to the event-driven reporting as it is. For example, the start timing of the current CPU occupation period depends on a PDCCH (Physical Downlink Control Channel) that requests a CSI report transmitted from a base station device.

[0009] On the other hand, in the event-driven report, a calculation unit is required to calculate measurement information before receiving a PDCCH. However, if the current definition of the CPU occupation interval is applied as is, the measurement information will fall outside the CPU occupation interval, and there is a possibility that a unit for calculating measurement information before receiving a PDCCH cannot be secured.

[0010] Therefore, a method for setting a CPU occupation interval that is compatible with event-driven reporting is required. Note that similar problems may occur in cases other than event-driven reporting.

[0011] The disclosed technology has been made in view of the above, and provides a control method for setting a CPU occupation interval according to the nature of a report.

[0012] In one aspect, a terminal device is provided that has a control unit that controls to measure a first signal, which is a signal for measurement, and controls to set a predetermined section from the timing of receiving the first signal as an occupied section of a processing unit for transmitting and processing the measurement information, and a transmitting unit that transmits a second signal including the measurement information when an opportunity to transmit the measurement information is detected.

[0013] It is possible to provide a control method for setting a CPU occupation interval according to the nature of the report.

[0014] FIG. 1 is a diagram showing an example of a wireless communication system according to a first embodiment. FIG. 2 is a diagram showing an example of the functional configuration of a base station device. FIG. 3 is a diagram showing an example of the functional configuration of a terminal device. FIG. 4 is a diagram showing an example of a sequence of a wireless communication system according to the first embodiment. FIG. 5 is a diagram showing an example of a CPU occupation interval. FIG. 6 is a diagram showing an example of a CPU occupation interval. FIG. 7 is a diagram showing an example of a description reflected in a standard. FIG. 8 is a diagram showing an example of a CPU occupation interval. FIG. 9 is a diagram showing an example of a control flow of a terminal device according to a second embodiment. FIG. 10 is a diagram showing an example of a CPU occupation interval. FIG. 11 is a diagram showing an example of the hardware configuration of a base station device. FIG. 12 is a diagram showing an example of the hardware configuration of a terminal device.

[0015] The present embodiment will be described in detail below with reference to the drawings. The problems and examples in this specification are merely examples and do not limit the scope of the rights of the present application. In particular, even if the expressions used are different, the technology of the present application can be applied as long as they are technically equivalent, and do not limit the scope of the rights. Furthermore, each embodiment can be combined as appropriate within the scope of not causing any contradiction in the processing content.

[0016] Furthermore, the terms used and technical contents described in this specification may be those described in specifications and contributions as standards related to communication such as 3GPP, as appropriate. Examples of such specifications include those described in Non-Patent Documents 1 to 14.

[0017] Hereinafter, embodiments of a base station apparatus, a terminal apparatus, a wireless communication system, and a communication method disclosed in the present application will be described in detail with reference to the accompanying drawings. Note that the disclosed technology is not limited to the following embodiments. First Embodiment

[0018] 1 is a diagram showing an example of a wireless communication system 1 according to the first embodiment. The wireless communication system 1 includes a base station device 100 and a terminal device 200. The base station device 100 forms a cell C10. The terminal device 200 is located within the cell C10.

[0019] The base station device 100 may be, for example, a small wireless base station device (including a micro wireless base station device, a femto wireless base station device, etc.) such as a macro wireless base station device or a pico wireless base station device, or may be wireless base station devices of various scales, and may be referred to as a wireless communication device, a communication device, a transmitting device, etc. The terminal device 200 may be, for example, a wireless terminal device such as various devices having wireless communication functions, such as a mobile phone, a smartphone, a PDA (Personal Digital Assistant), a personal computer, a vehicle, an airplane, a drone, or a device (such as a sensor device) mounted on a robot, an AV device, a home appliance, an office device, a vending machine, other household equipment, industrial equipment, etc., and may be referred to as a wireless communication device, a communication device, a receiving device, a mobile station, etc.

[0020] The base station device 100 is connected to network devices (upper devices and other base station devices) not shown in the figure via wired connections. Note that the base station device 100 may also be connected to the network devices wirelessly instead of via wired connections.

[0021] The base station device 100 may be configured such that the wireless communication function with the terminal device 200 and the digital signal processing and control functions are separated into separate devices. In this case, the device having the wireless communication function can be called an RRH (Remote Radio Head), and the device having the digital signal processing and control functions can be called a BBU (Base Band Unit). The RRHs may be installed extending from the BBU, and they may be connected by a wired connection such as optical fiber. Alternatively, they may be connected wirelessly. Instead of the aforementioned RRH and BBU, the base station device 100 may be separated into, for example, a Central Unit (CU), a Distributed Unit (DU), and a Radio Unit (RU). The DU includes, for example, a MAC (Media Access Control) layer function. The DU may also include, for example, a function of an RLC (Radio Link Control) layer. The RU includes at least an RF wireless circuit. The DU and RU may also be integrated into one unit.

[0022] On the other hand, the terminal device 200 communicates with the base station device 100 via wireless communication.

[0023] Next, a description will be given of the base station device 100. Fig. 2 is a diagram showing an example of the functional configuration of the base station device 100. The base station device 100 includes a wireless communication unit 110, a control unit 120, a storage unit 130, and a communication unit 140.

[0024] The wireless communication unit 110 is composed of a transmitting unit 111 and a receiving unit 112, and performs wireless communication with the terminal device 200. Specifically, the transmitting unit 111 transmits to the terminal device 200 downlink signals such as measurement signals (e.g., SSB, reference signals) that are to be measured by the terminal device 200, random access procedure signals, RRC layer signals, downlink data signals, and downlink control signals.

[0025] The receiving unit 112 can receive uplink signals transmitted from the terminal device 200, such as signals of a random access procedure, signals of an RRC layer, uplink data signals, and uplink control signals.

[0026] The control unit 120 controls the base station device 100. Specifically, the control unit 120 can control the establishment of an RRC connection with the terminal device 200, signal processing of signals received by the receiving unit 112, creation of transmission blocks (TBs), mapping of the transmission blocks to radio resources, and the like.

[0027] The storage unit 130 can store, for example, downstream data signals.

[0028] The communication unit 140 connects to a network device (e.g., a higher-level device or another base station device) via a wired or wireless connection to communicate with the network device. Data signals received by the communication unit 140 and directed to the terminal device 200 can be stored in the storage unit 130. Note that the wireless communication unit 110 and the communication unit 140 may be collectively referred to as the communication unit.

[0029] Next, the terminal device 200 will be described. Fig. 3 is a diagram showing an example of the functional configuration of the terminal device 200. As shown in Fig. 3, the terminal device 200 includes a communication unit 210, a control unit 220, and a storage unit 230. These components are connected to each other so as to enable unidirectional or bidirectional input and output of signals and data. The communication unit 210 can be described as being divided into a transmission unit 211 and a reception unit 212.

[0030] The transmitter 211 transmits data signals and control signals by wireless communication via an antenna. Note that the antenna may be common for both transmission and reception. The transmitter 211 transmits uplink signals such as random access procedure signals, RRC layer signals, uplink data signals, and uplink control signals, for example.

[0031] The receiver 212 receives downlink signals, such as a random access procedure signal, a downlink data signal, and a downlink control signal, transmitted from the base station device 100. The received signals may also include reference signals used for channel estimation and demodulation, for example.

[0032] The control unit 220 controls the terminal device 200. Specifically, the control unit 220 can control the establishment of an RRC connection with the base station device 100, signal processing of signals received by the receiving unit 212, creation of transmission blocks (TBs), mapping of the transmission blocks to radio resources, etc. Furthermore, the control unit 220 can perform control to set a CPU (CSI Processing Unit) occupation duration.

[0033] The storage unit 230 can store, for example, uplink data signals, and can also store configuration information (or setting information) related to wireless communication transmitted from the base station device 100.

[0034] The flow of processing up to when the terminal device 200 transmits the measurement information will be described with reference to Fig. 4. Fig. 4 is a diagram showing an example of a sequence of the wireless communication system 1 in the first embodiment.

[0035] The transmitter 111 of the base station device 100 transmits a first signal, which is a measurement signal (step S10). The first signal is, for example, a reference signal, such as an SSB (Synchronization Signal Block) or a CSI (Channel State Information)-RS (Reference Signal). The first signal is a signal that is transmitted periodically. Therefore, after transmitting the first signal in step S10, the transmitter 111 of the base station device 100 transmits the first signal after a predetermined period (step S11). Also, after transmitting the first signal in step S11, the transmitter 111 of the base station device 100 transmits the first signal after a predetermined period (step S12). In this way, the first signal is transmitted periodically. Therefore, although not shown in the figure, the first signal is transmitted periodically even after step S12.

[0036] The control unit 220 of the terminal device 200 determines that transmission of measurement information has been triggered (step S20). For example, the control unit 220 of the terminal device 200 determines that transmission of measurement information has been triggered when a condition for transmitting event-triggered measurement information is met. Note that the triggering of transmission of measurement information may also be described as detection of a trigger for transmission of measurement information. Conditions for transmitting event-triggered measurement information include, for example, a state in which the quality of the current beam is lower than a certain threshold, a state in which the quality of at least one new beam (e.g., L1-RSRP) is higher than a threshold value than the current beam, a state in which the quality of the new beam is higher than a certain threshold, or a state in which the quality of the current beam is lower than threshold 1 and the quality of at least one new beam is higher than threshold 2.

[0037] When the transmission of the measurement information is triggered, the transmitter 211 of the terminal device 200 transmits a second signal including the measurement information of the first signal (step S30).

[0038] Here, the setting of the CPU occupation interval will be described using FIG. 5. FIG. 5 is a diagram showing an example of the CPU occupation interval. FIG. 5(A) shows an example in which the base station device 100 allocates resources for a second signal including measurement information to the terminal device 200, and the terminal device 200 transmits the second signal. FIG. 5(B) shows an example in which the base station device 100 allocates resources for periodic uplink signals to the terminal device 200, and transmits the second signal using at least a portion of the allocated resources. Note that in FIGS. 5(A) and 5(B), the reference signal RS1 corresponds to, for example, the first signal transmitted in step S10 of FIG. 4, the reference signal RS2 corresponds to, for example, the first signal transmitted in step S11 of FIG. 4, and the reference signal RS3 corresponds to, for example, the first signal transmitted in step S12 of FIG. 4. Note that in FIGS. 5(A) and 5(B), the trigger (Trigger) corresponds to, for example, step S20 of FIG. 4. 5A and 5B, a report corresponds to, for example, the second signal transmitted in step S30 in FIG.

[0039] In FIG. 5A , the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation period starts from the first symbol at which reference signal RS1 is received. The control unit 220 of the terminal device 200 then defines the period until a report is transmitted as the CPU occupation period. The period from the start timing to the end timing of the CPU occupation period is an example of a predetermined period. The reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information, is, for example, a reference signal received after receiving RRC individual setting information and configuring information related to the event-triggered measurement information. Furthermore, the reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information, is, for example, a reference signal received after transitioning to an RRC connected state. Furthermore, the reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information, is, for example, a reference signal received even after receiving SIB1.

[0040] Specifically, in response to the triggering of the transmission of event-triggered measurement information, the transmitter 211 of the terminal device 200 transmits a scheduling request (SR). The receiver 212 of the terminal device 200 then receives allocation information (UL Grant) corresponding to the scheduling request. The scheduling request is, for example, uplink control information (UCI) requesting resources for uplink signals. The scheduling request is, for example, dedicated uplink control information notifying the transmission of event-triggered measurement information. The transmitter 211 of the terminal device 200 then transmits a second signal (report) including the measurement information using resources corresponding to the allocation information. When the last symbol transmitting the second signal ends, the controller 220 of the terminal device 200 ends the CPU occupation interval. The measurement information may include measurement information for reference signals RS1, RS2, and RS3, or an average value may be sent. Alternatively, measurement information for a predetermined number of reference signals may be sent before the measurement information is sent. For example, if the predetermined number is 1, measurement information for reference signal RS3 is transmitted. Also, for example, if the predetermined number is 2, measurement information for reference signals RS2 and RS3 is transmitted.

[0041] Next, an example of FIG. 5B will be described. In FIG. 5B, the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation period starts from the first symbol receiving the reference signal RS1. The control unit 220 of the terminal device 200 then determines the period up to the last symbol transmitting the report as the CPU occupation period. The period from the start timing to the end timing of the CPU occupation period is an example of a predetermined period. In FIG. 5B, if an event is not triggered before the uplink resource (UL resource), the transmission unit 211 of the terminal device 200 does not transmit the measurement information to the base station device 100. On the other hand, if an event is triggered before the uplink resource (UL resource), the transmission unit 211 of the terminal device 200 transmits the measurement information to the base station device 100.

[0042] Specifically, since an event is not triggered before the uplink resource (UL resource) between reference signal RS1 and reference signal RS2, the control unit 220 of the terminal device 200 controls not to transmit measurement information using the uplink resource (UL resource). Also, since an event is not triggered before the uplink resource (UL resource) between reference signal RS2 and reference signal RS3, the control unit 220 of the terminal device 200 controls not to transmit measurement information using the uplink resource (UL resource). Also, since an event is triggered before the uplink resource (UL resource) after reference signal RS3, the control unit 220 of the terminal device 200 controls to transmit measurement information using the uplink resource (UL resource). Then, the control unit 220 of the terminal device 200 ends the CPU occupation period. The measurement information may be sent by collectively transmitting the measurement information for reference signals RS1, RS2, and RS3, or by transmitting an average value, or by transmitting measurement information for a predetermined number of reference signals before transmitting the measurement information. For example, if the predetermined number is 1, measurement information for reference signal RS3 is transmitted. For example, if the predetermined number is 2, measurement information for reference signals RS2 and RS3 is transmitted.

[0043] Another example of setting the CPU occupation interval will be described with reference to FIG. 6 . FIG. 6 is a diagram showing an example of the CPU occupation interval. FIG. 6(A) shows an example in which the base station device 100 allocates resources for a second signal including measurement information to the terminal device 200, and the terminal device 200 transmits the second signal. FIG. 6(B) shows an example in which the base station device 100 allocates resources for periodic uplink signals to the terminal device 200, and transmits the second signal using at least a portion of the allocated resources. Note that FIG. 6 shows an example in which measurement information is transmitted multiple times after an event is triggered. Note that while FIG. 6 shows an example in which measurement information is transmitted twice, the same applies to three or more transmissions. Note that in FIG. 6 , parts that are the same as those in FIG. 5 are assigned the same reference numerals.

[0044] In FIG. 6A , the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation period starts from the first symbol receiving the reference signal RS1. The control unit 220 of the terminal device 200 then sets the period from the first report transmission to the last symbol transmitting the first report as the CPU occupation period. Then, for example, the period from after the first report transmission to the second report is not set as the CPU occupation period. By doing so, the number of CPU units can be used for other CSI reports for the period from after the first report transmission to the second report. Furthermore, for example, the period from after the first report transmission to the second report is set as the CPU occupation period. By doing so, the number of CPU units cannot be used for other CSI reports for the period from after the first report transmission to the second report.

[0045] 6(B), the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation period starts from the first symbol receiving the reference signal RS1. The control unit 220 of the terminal device 200 then sets the period from the first report transmission to the last symbol transmitting the first report as the CPU occupation period. Then, for example, the period from after the first report transmission to the second report is not set as the CPU occupation period. By doing so, the number of CPU units can be used for other CSI reports for the period from after the first report transmission to the second report. Then, for example, the period from after the first report transmission to the second report is set as the CPU occupation period. By doing so, the number of CPU units cannot be used for other CSI reports for the period from after the first report transmission to the second report.

[0046] In the case of event-triggered measurement information transmission, the gap between the reception timing of uplink allocation information and the transmission timing of the measurement information can be shortened. This is because the calculation of the measurement information is already completed before the uplink allocation information is received. Therefore, for example, a first gap for event-triggered measurement information and a second gap used for transmission of measurement information triggered by the base station device 100 may be set. Note that the second gap is a smaller value than the first gap.

[0047] Therefore, the difference in the gaps can be represented by changing the currently defined relationship of the time gap between the PDCCH and the CSI report, as defined in Non-Patent Document 8, for example, as shown in Fig. 7. Note that Fig. 7 is a diagram showing an example of the description reflected in the standard.

[0048] As described above, in the first embodiment, the terminal device 200 controls the terminal device 200 to measure a first signal, which is a measurement signal, and controls the terminal device 200 to set a predetermined period from the reception timing of the first signal as an occupation period of a processing unit for transmitting and processing measurement information. Then, when an opportunity to transmit the measurement information is detected, the terminal device 200 transmits a second signal including the measurement information. In short, the terminal device 200 can set a predetermined period from the reception timing of the first signal as a CPU occupation period. This makes it possible to set a CPU occupation period according to an event-triggered report. Embodiment 2

[0049] In the first embodiment, a first example has been described in which the terminal device 200 sets a predetermined interval from the reception timing of the first signal as the CPU occupation interval. In the second embodiment, a second example will be described in which a predetermined interval from the reception timing of the first signal is set as the CPU occupation interval. Note that in the second embodiment, the wireless communication system, the base station device, and the terminal device are the same as those in the first embodiment, and therefore description thereof will be omitted.

[0050] The setting of the CPU occupation interval in the second embodiment will be described with reference to FIG. 8 . FIG. 8 is a diagram showing an example of the CPU occupation interval. FIG. 8(A) shows an example in which the base station apparatus 100 allocates resources for a second signal including measurement information to the terminal apparatus 200, and the terminal apparatus 200 transmits the second signal. Also, FIGS. 8(B) and 8(C) show examples in which the base station apparatus 100 allocates resources for a periodic uplink signal to the terminal apparatus 200, and transmits the second signal using at least a portion of the allocated resources. In the case of FIG. 8(B), the terminal apparatus 200 notifies the base station apparatus 100 in advance whether or not to transmit the second signal using the resources for the periodic uplink signal allocated by the base station apparatus 100. For the resources for notification, for example, the base station apparatus 100 allocates resources different from the resources for the periodic uplink signal. Also, for example, the base station apparatus 100 allocates the same resources as the resources for the periodic uplink signal. In the case of Figure 8(C), the terminal device 200 does not notify the base station device 100 in advance as to whether or not to transmit the second signal using the periodic uplink signal resources allocated by the base station device 100. Note that in Figures 8(A), 8(B), and 8(C), reference signal RS1 corresponds to, for example, the first signal transmitted in step S10 of Figure 4, reference signal RS2 corresponds to, for example, the first signal transmitted in step S11 of Figure 4, and reference signal RS3 corresponds to, for example, the first signal transmitted in step S12 of Figure 4. Also, in Figures 8(A), 8(B), and 8(C), a trigger (Trigger) corresponds to, for example, step S20 of Figure 8. Also, in Figures 8(A), 8(B), and 8(C), a report (Report) corresponds to, for example, the second signal transmitted in step S30 of Figure 4. In addition, in FIGS. 8A, 8B, and 8C, the same parts as those in FIGS. 5A and 5B are given the same reference numerals, and the description thereof will be omitted.

[0051] In FIG. 8A , the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation period starts from the first symbol receiving reference signal RS1. The control unit 220 of the terminal device 200 ends the CPU occupation period when a first time (z) has elapsed since the reference signal RS1. The control unit 220 of the terminal device 200 also starts the CPU occupation period from the first symbol receiving reference signal RS2, for example. The control unit 220 of the terminal device 200 also ends the CPU occupation period when a first time (z) has elapsed since the reference signal RS2. The control unit 220 of the terminal device 200 also starts the CPU occupation period from the first symbol receiving reference signal RS3, for example. If the control unit 220 of the terminal device 200 detects a trigger and transmits a scheduling request (SR) before the first time (z) has elapsed since the reference signal RS3, the control unit 220 extends the end timing of the CPU occupation period to the last symbol at which a report is transmitted. In other words, the CPU occupation period is the second time period from the time when the reference signal RS3 is received to the time when the transmission of the measurement information is completed. The period from the start time to the end time of the CPU occupation period is an example of a predetermined period. In other words, the first time period (z) is an example of a predetermined period. Furthermore, the period from the time when the reference signal RS3 is received to the time when the measurement information report is transmitted is an example of a predetermined period.

[0052] In FIG. 8A , the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation period starts from the first symbol receiving reference signal RS3. The control unit 220 of the terminal device 200 then sets the period up to the transmission of the first report as the CPU occupation period. The period from after the transmission of the first report to the second report is not set as the CPU occupation period, for example. This allows the number of CPU units to be used for other CSI reports from after the transmission of the first report to the last symbol of the second report. Furthermore, the period from after the transmission of the first report to the second report is set as the CPU occupation period, for example. This allows the number of CPU units to be used for other CSI reports from after the transmission of the first report to the last symbol of the second report.

[0053] Also, in FIG. 8(B), the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. In the case of FIG. 8(B), the terminal device 200 notifies the base station device 100 in advance whether or not to transmit a second signal using the periodic uplink signal resources allocated by the base station device 100. In this case, different CPU occupation periods can be considered depending on whether or not the terminal device 200 transmits a second signal. For example, the CPU occupation period starts from the first symbol receiving the reference signal RS1. Then, the control unit 220 of the terminal device 200 ends the CPU occupation period when a first time (z) has elapsed since the reference signal RS1. Also, the control unit 220 of the terminal device 200 starts the CPU occupation period from the first symbol receiving the reference signal RS2, for example. Then, the control unit 220 of the terminal device 200 ends the CPU occupation period when a first time (z) has elapsed since the reference signal RS2. Furthermore, the control unit 220 of the terminal device 200 starts the CPU occupation period from, for example, the first symbol at which the reference signal RS3 is received. Then, when the control unit 220 of the terminal device 200 detects a trigger before a first time (z) has elapsed since the reference signal RS3 or at the point at which the first time (z) has elapsed, it extends the end timing of the CPU occupation period to a period up to the last symbol at which the report is transmitted. In other words, the CPU occupation period is a second time period from the time at which the reference signal RS3 is received to the time at which the transmission of the measurement information is completed. The period from the start timing to the end timing of the CPU occupation period is an example of a predetermined period. In other words, the first time (z) is an example of a predetermined time. The period from the time at which the reference signal RS3 is received to the time at which the measurement information report is transmitted is an example of a predetermined time. Furthermore, the first time period is, for example, equal to or less than the difference between the resource for the reference signal (RS Resource) and the resource for the uplink signal (UL Resource).

[0054] In FIG. 8(B), the CPU occupation period starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation period starts from the first symbol receiving reference signal RS3. The control unit 220 of the terminal device 200 then sets the period up to the transmission of the first report as the CPU occupation period. Then, for example, the period from after the transmission of the first report to the second report is not set as the CPU occupation period. By doing so, the number of CPU units can be used for other CSI reports for the period from after the transmission of the first report to the second report. Furthermore, for example, the period from after the transmission of the first report to the second report is set as the CPU occupation period. By doing so, the number of CPU units cannot be used for other CSI reports for the period from after the transmission of the first report to the second report.

[0055] Also, in FIG. 8(C), the CPU occupation period starts from the timing of receiving a reference signal for the event-triggered measurement information, which may transmit the event-triggered measurement information. In the case of FIG. 8(C), the terminal device 200 does not notify the base station device 100 in advance about whether or not to transmit the second signal using the periodic uplink signal resource allocated by the base station device 100. In this case, the CPU occupation period is unrelated to the transmission of the second signal from the terminal device 200. For example, the CPU occupation period starts from the first symbol at which the reference signal RS1 is received. Then, the control unit 220 of the terminal device 200 ends the CPU occupation period until the last symbol of the periodic uplink signal resource corresponding to the reference signal RS1. With respect to the periodic uplink signal resource corresponding to the reference signal RS1, for example, the periodic uplink signal resource closest to the reference signal RS1 after the reference signal RS1. In short, the CPU occupation period is a third time period from the timing of receiving the reference signal RS1 to the last symbol of the corresponding allocated resource. Note that the period from the start timing to the end timing of the CPU occupation period is an example of a predetermined period. Furthermore, the control unit 220 of the terminal device 200 starts the CPU occupation period from, for example, the first symbol at which reference signal RS2 is received. Then, the control unit 220 of the terminal device 200 ends the CPU occupation period up to the last symbol of the resource for the periodic uplink signal corresponding to reference signal RS1. Furthermore, the control unit 220 of the terminal device 200 starts the CPU occupation period from, for example, the first symbol at which reference signal RS3 is received. Then, even if the control unit 220 of the terminal device 200 detects a trigger, the control unit 220 sets the period up to the last symbol of the resource for the corresponding periodic uplink signal.

[0056] In FIG. 8(C), the CPU occupation interval starts from the timing of receiving a reference signal for event-triggered measurement information, which may transmit the event-triggered measurement information. For example, the CPU occupation interval starts from the first symbol receiving reference signal RS3. Then, the control unit 220 of the terminal device 200 sets the interval from the first report transmission to the last symbol for transmitting the first report as the CPU occupation interval. Then, for example, the period from after the first report transmission to the last symbol for the second report is not set as the CPU occupation interval. By doing so, the number of CPU units can be used for other CSI reports for the second report. Furthermore, for example, the period from after the first report transmission to the last symbol for the second report is set as the CPU occupation interval. By doing so, the number of CPU units cannot be used for other CSI reports for the second report.

[0057] The first time (z) may be notified from the base station device 100 to the terminal device 200, or may use a value previously defined by a standard. The first time (z) may start, for example, from the last symbol of the received reference signal. When a report is transmitted using a pre-configured resource as shown in FIG. 8(B), the first time (z) may be set to the timing of the last symbol of the uplink resource (UL resource).

[0058] Next, control of the CPU occupation section in the second embodiment will be described with reference to Fig. 9. Fig. 9 is a diagram showing an example of a control flow of the terminal device 200 in the second embodiment.

[0059] The control unit 220 of the terminal device 200 receives the reference signal and starts the CPU occupation period (step S21). The control unit 220 of the terminal device 200 determines whether a trigger for transmitting measurement information has been detected within the first time period (step S22).

[0060] If a trigger for transmitting measurement information is detected within the first time period (step S22: Yes), the control unit 220 of the terminal device 200 determines whether to notify the base station device 100 (step S23).

[0061] If the base station device 100 is notified (step S23: Yes), the control unit 220 of the terminal device 200 performs processing for transmitting the measurement information (step S24), and then ends the CPU occupation period (step S26). In this case, the CPU occupation period becomes the second time.

[0062] If the base station device 100 is not notified (step S23: No), the control unit 220 of the terminal device 200 performs processing according to the allocated resources (step S25). Then, the control unit 220 of the terminal device 200 ends the CPU occupation period (step S26). In this case, the CPU occupation period becomes the third time.

[0063] If a trigger for transmitting the measurement information is not detected within the first time period (step S22: No), the control unit 220 of the terminal device 200 ends the CPU occupation period (step S26). In this case, the CPU occupation period becomes the first time period.

[0064] By performing the control described above, the terminal device 200 can change the CPU occupation period depending on whether or not the measurement information is triggered from the timing of receiving the reference signal.

[0065] Another example of the setting of the CPU occupation interval in the second embodiment will be described with reference to Figure 10. Figure 10 is a diagram showing an example of the CPU occupation interval. Figure 10 (A) shows an example in which the base station apparatus 100 allocates resources for a second signal including measurement information to the terminal apparatus 200, and the terminal apparatus 200 transmits the second signal. Figure 10 (B) shows an example in which the base station apparatus 100 allocates resources for periodic uplink signals to the terminal apparatus 200, and transmits the second signal using at least a portion of the allocated resources. Note that in Figure 10, the same reference numerals are used for the same contents as in Figure 8, and description thereof will be omitted.

[0066] The differences between Figure 10(A) and Figure 8(A) will be explained. In Figure 10(A), the CPU occupation period is fixed to a first time. Then, when measurement information transmission is triggered, even if it is outside the CPU occupation period, the transmitter 211 of the terminal device 200 transmits a scheduling request (SR). Furthermore, even if measurement information transmission is triggered within the CPU occupation period, the CPU occupation period ends at the first time (z). This shortens the CPU occupation period for reporting event-triggered measurement information. This makes it easier to secure the number of units for transmitting other measurement information.

[0067] Next, the differences between FIG. 10(B) and FIG. 8(B) will be explained. In FIG. 10(B), the CPU occupation period is fixed to a first time. Then, when measurement information transmission is triggered, even outside the CPU occupation period, the transmitter 211 of the terminal device 200 transmits the measurement information using uplink resources (UL resources). Furthermore, even when measurement information transmission is triggered within the CPU occupation period, the CPU occupation period ends at the first time (z). This shortens the CPU occupation period for reporting event-triggered measurement information. This makes it easier to secure the number of units for transmitting other measurement information.

[0068] As described above, in the second embodiment, the terminal device 200 controls the terminal device 200 to measure a first signal, which is a measurement signal, and controls the terminal device 200 to set a predetermined interval for each reception timing of the first signal as an occupation interval of a processing unit for transmitting and processing measurement information. Then, when an opportunity to transmit the measurement information is detected, the terminal device 200 transmits a second signal including the measurement information. In short, the terminal device 200 can set a predetermined interval as a CPU occupation interval for each reception timing of the first signal. This makes it possible to set a CPU occupation interval according to an event-triggered report. Embodiment 3

[0069] In the first embodiment, a first example has been described in which the terminal device 200 sets a predetermined interval from the reception timing of the first signal as the CPU occupation interval. In the second embodiment, a second example has been described in which a predetermined interval from the reception timing of the first signal is set as the CPU occupation interval. In the third embodiment, an example will be described in which the method described in the first embodiment and the method described in the second embodiment are used selectively depending on the conditions. In the third embodiment, the wireless communication system, base station device, and terminal device are the same as those in the first embodiment, and therefore description thereof will be omitted.

[0070] In the third embodiment, the CPU occupation interval set by the method of the first embodiment will be referred to as the first interval, and the CPU occupation interval set by the method of the second embodiment will be referred to as the second interval.

[0071] The control unit 220 of the terminal device 200 determines whether the CPU occupation period should be the first period or the second period, depending on the setting for the information included in the measurement information. For example, when the measurement information is set to include the first measurement information, the control unit 220 of the terminal device 200 controls to set the CPU occupation period to the first period. Note that the first measurement information is, for example, filtered RSRP. The filtered RSRP is filtered RSRP. For example, when RSRP measured at the physical layer is filtered at an upper layer, it is filtered RSRP.

[0072] Furthermore, for example, when the measurement information is set to include second measurement information, the control unit 220 of the terminal device 200 controls to set the CPU occupation interval to the second interval. Note that the second measurement information is, for example, RSRP (or information that does not include filtered RSRP).

[0073] Whether the measurement information includes the first information or the second information is set, for example, by transmitting information regarding the CPU occupation interval for an event-driven measurement information report from the base station device 100 to the terminal device 200.

[0074] In addition, the control unit 220 of the terminal device 200 may determine whether the CPU occupation period should be the first period or the second period depending on an information element (e.g., timeRestrictionForChannelMeasurements) relating to the reference signal transmitted from the base station device 100 and the CSI measurement.

[0075] For example, when an information element (e.g., timeRestrictionForChannelMeasurements) is not set (notConfigured), the control unit 220 of the terminal device 200 controls to set the CPU occupation section to the first section. Also, when an information element (e.g., timeRestrictionForChannelMeasurements) is set (notConfigured), the control unit 220 of the terminal device 200 controls to set the CPU occupation section to the second section.

[0076] The information element may be described as an information element that controls a CPU occupation period for sending event-driven measurement information.

[0077] As described above, in the third embodiment, the terminal device 200 can set the CPU occupation section to either the first section or the second section depending on the situation. In this way, the CPU occupation section can be controlled depending on the situation of the terminal device 200. Hardware configuration of each device in each embodiment

[0078] The hardware configuration of each device in the wireless communication system of each embodiment will be described with reference to FIGS.

[0079] Fig. 11 is a diagram showing an example of the hardware configuration of base station device 100. As shown in Fig. 11, base station device 100 has, as hardware components, for example, an RF (Radio Frequency) circuit 320 equipped with an antenna 310, a CPU (Central Processing Unit) 330, a DSP (Digital Signal Processor) 340, a memory 350, and a network IF (Interface) 360. CPU 330 is connected via a bus so as to enable input and output of various signals and data signals. The memory 350 includes at least one of a RAM (Random Access Memory) such as an SDRAM (Synchronous Dynamic Random Access Memory), a ROM (Read Only Memory), and a flash memory, and stores programs, control information, and data signals.

[0080] The correspondence between the functional configuration of the base station device 100 shown in Fig. 2 and the hardware configuration of the base station device 100 shown in Fig. 11 will be described. The transmitter 111 and receiver 112 (or wireless communication unit 110) are realized by, for example, an RF circuit 320, or an antenna 310 and an RF circuit 320. The control unit 120 is realized by, for example, a CPU 330, a DSP 340, a memory 350, a digital electronic circuit (not shown), etc. Examples of the digital electronic circuit include an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), and an LSI (Large Scale Integration). The storage unit 130 is realized by, for example, the memory 350. The communication unit 140 is realized by, for example, the network IF 360 .

[0081] In addition, in the base station apparatus 100, a plurality of data signals to be transmitted in a plurality of subbands can be generated, and the filters that generate these signals may be configured independently for each subband.

[0082] Fig. 12 is a diagram showing an example of the hardware configuration of the terminal device 200. As shown in Fig. 12, the terminal device 200 has, as hardware components, an RF circuit 420 equipped with an antenna 410, a CPU 430, a DSP 440, and a memory 450. The memory 450 includes at least one of a RAM such as an SDRAM, a ROM, and a flash memory, and stores programs, control information, and data signals.

[0083] The correspondence between the functional configuration of the terminal device 200 shown in Fig. 3 and the hardware configuration of the terminal device 200 shown in Fig. 12 will be described. The transmitter 211 and receiver 212 (or communication unit 210) are realized by, for example, an RF circuit 420, or an antenna 410 and an RF circuit 420. The control unit 220 is realized by, for example, a CPU 430, a DSP 440, a memory 450, a digital electronic circuit (not shown), etc. Examples of the digital electronic circuit include an ASIC, an FPGA, and an LSI. The storage unit 230 is realized by, for example, the memory 450.

[0084] The embodiments may be combined as appropriate within a range that does not cause any contradiction.

[0085] In each embodiment, examples of a base station device and a terminal device are described, but the disclosed technology is not limited to this and can be applied to various devices, such as electronic devices mounted on automobiles, trains, airplanes, artificial satellites, etc., electronic devices transported by drones, etc., robots, AV equipment, home appliances, office equipment, vending machines, and other household equipment.

[0086] Furthermore, although the embodiments have been described using fifth-generation mobile communications as an example, the application of the disclosed technology is not limited to this. For example, the disclosed technology may be applied to mobile communications of different generations, such as sixth and seventh generations.

[0087] 1 Wireless communication system 100 Base station device C10 Cell 110 Wireless communication unit 111 Transmitter 112 Receiver 120 Control unit 130 Memory unit 140 Communication unit 200 Terminal device 210 Communication unit 211 Transmitter 212 Receiver 220 Control unit 230 Memory unit 310 Antenna 320 RF circuit 330 CPU 340 DSP 350 Memory 360 Network IF 410 Antenna 420 RF circuit 430 CPU 440 DSP 450 Memory

Claims

1. A terminal device having: a control unit that controls to measure a first signal, which is a signal for measurement, and controls to set a predetermined period from the timing of receiving the first signal as an occupied period of a processing unit for transmitting and processing measurement information; and a transmitting unit that transmits a second signal including the measurement information when an opportunity to transmit the measurement information is detected.

2. The terminal device according to claim 1, wherein the first signal is a reference signal that is periodically transmitted, and the second signal is a report that includes measurement results of the reference signal.

3. The terminal device according to claim 1, wherein the first signal is the first signal to be transmitted among a plurality of first signals, and the control unit controls to set the period from the first symbol of the first signal to the completion of transmission of the second signal as the occupied period of the processing unit.

4. The terminal device according to claim 1, wherein the first signal is the first signal to be transmitted among a plurality of first signals, and the control unit controls to set the interval from the first symbol of each of the plurality of first signals until a first time has elapsed as the occupied interval of the processing unit.

5. The terminal device according to claim 4, wherein the first time period starts from the last symbol of each of the plurality of first signals.

6. The terminal device according to claim 4, wherein the control unit controls the processing unit to set the occupied section until transmission of the measurement information is completed when an opportunity to transmit the measurement information is detected within the first time period.

7. A terminal device as described in claim 1, further comprising a receiving unit that receives information regarding a CPU occupation interval for an event-driven measurement information report, wherein the control unit controls to determine whether the occupation interval of the processing unit is a first interval or a second interval depending on the information, wherein the first interval is an interval from the reception timing of the first signal, which is the first signal to be transmitted among a plurality of first signals, to the completion of transmission of the second signal, and the second interval is an interval from the first symbol of each of the plurality of first signals to the elapse of a first time.

8. A base station device having: a transmitting unit that transmits a first signal, which is a signal for measurement; and a receiving unit that controls to set a predetermined period from the timing of receiving the first signal as an occupied period of a processing unit for transmitting and processing measurement information, and receives a second signal including the measurement information that is transmitted when an opportunity to transmit the measurement information is detected.

9. A wireless communication system having: a base station device that transmits a first signal, which is a signal for measurement; and a transmitting unit that controls to measure the first signal, controls to set a predetermined period from the timing of receiving the first signal as an occupied period of a processing unit for transmitting and processing measurement information, and transmits a second signal including the measurement information when an opportunity to transmit the measurement information is detected.

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