JP7750463B2 - Terminal and communication method - Google Patents

Description

The present invention relates to a terminal and a communication method in a wireless communication system.

The 3GPP (3rd Generation Partnership Project) is currently studying a wireless communication system known as 5G or NR (New Radio) (hereinafter referred to as "NR") to achieve even greater system capacity, faster data transmission speeds, and even lower latency in wireless sections. With 5G, various wireless technologies and network architectures are being studied to meet the requirements of achieving a throughput of 10 Gbps or more while reducing latency in wireless sections to 1 ms or less (for example, Non-Patent Document 1).

3GPP TS 38.213 V16.3.0 (2020-09)

In future wireless communication systems (e.g., Rel. 17 and later), it is expected that terminals compatible with various use cases such as IoT will be introduced.

However, it is unclear how UEs with different capabilities/categories use resources. If resources are not used appropriately, there is a risk of degraded system performance, including reduced resource utilization efficiency.

The present invention has been made in consideration of the above points and aims to provide technology that enables appropriate use of resources according to capabilities.

According to the disclosed technology, there is provided a terminal including: a receiving unit that receives a reference signal for positioning in at least one of a first band and a second band; a control unit that performs positioning based on the reference signal for positioning and acquires a positioning result; and a transmitting unit that transmits the positioning result , wherein the receiving unit receives the reference signal for positioning in the second band when it receives a notification indicating the presence of the reference signal for positioning in the second band; and does not receive the reference signal for positioning in the second band when it does not receive the notification indicating the presence of the reference signal for positioning in the second band; and the receiving unit triggers the positioning result in the second band; and the transmitting unit transmits the positioning result in the second band when it receives downlink control information in the first band .

The disclosed technology provides technology that enables appropriate use of resources according to capabilities.

1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. FIG. 1 is a diagram for explaining a situation in which a plurality of types of terminals are mixed. FIG. 10 is a diagram illustrating a baseline channel and an additional channel. FIG. 10 is a sequence diagram illustrating an example of a flow of a position measurement process according to the first embodiment. FIG. 2 is a diagram for explaining a positioning process according to the first embodiment. FIG. 10 is a sequence diagram illustrating an example of a flow of a position measurement process according to a second embodiment. FIG. 10 is a diagram for explaining a position measurement process according to a second embodiment. FIG. 10 is a diagram for explaining a positioning process according to a third embodiment. FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention. 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. FIG.

The following describes an embodiment of the present invention with reference to the drawings. Note that the embodiment described below is an example, and the embodiments to which the present invention can be applied are not limited to the following embodiment.

The following describes an embodiment of the present invention with reference to the drawings. Note that the embodiment described below is an example, and the embodiments to which the present invention can be applied are not limited to the following embodiment.

Existing technologies are used as appropriate in the operation of the wireless communication system of an embodiment of the present invention. Such existing technologies include, but are not limited to, existing NR.

In addition, this specification uses terms used in existing NR or LTE specifications, such as PDCCH, RRC, MAC, and DCI, but the channel names, protocol names, signal names, function names, etc. used in this specification may also be called by other names.

(System configuration)
FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
As shown in Fig. 1, a wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

A base station 10 is a communication device that provides one or more cells and performs wireless communication with terminals 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, where the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Furthermore, the TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe.

The base station 10 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with the terminal 20. In carrier aggregation, one primary cell (PCell) and one or more secondary cells (SCells) are used.

The base station 10 transmits synchronization signals, system information, etc. to the terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The synchronization signal may also be SSB. The system information is transmitted, for example, via the NR-PBCH (Physical Broadcast Channel) or PDSCH (Physical Downlink Shared Channel), and is also referred to as broadcast information. As shown in FIG. 1, the base station 10 transmits control signals or data to the terminal 20 via the DL (Downlink) and receives control signals or data from the terminal 20 via the UL (Uplink). Note that, here, signals transmitted via control channels such as the PUCCH (Physical Uplink Control Channel) and PDCCH (Physical Downlink Control Channel) are referred to as control signals, and signals transmitted via shared channels such as the PUSCH and PDSCH are referred to as data; however, these nomenclatures are merely examples.

The terminal 20 is a communication device equipped with wireless communication functions, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 may also be referred to as a UE, and the base station 10 may also be referred to as a gNB.

(Problems with the prior art)
Next, problems with the conventional technology will be described. In future wireless communication systems/networks (e.g., 6G), it is expected that a wider variety of use cases/terminals will be supported than in 5G, NR, etc., in order to further improve communication speed/capacity/reliability/delay performance/multiple connections, and further to expand into new areas such as sensing.

In LTE and NR, functions that have been reduced from the mandatory functions supported by existing terminals are defined as UE categories/capabilities for the Internet of Things (IoT). Examples of such UE categories/capabilities include enhanced machine type communication (eMTC) in LTE, narrow band (NB)-IoT, and reduced capability (RedCap) in NR. Therefore, additional functions are likely to be required to compensate for the degradation of performance due to reduced functionality.

Figure 2 is a diagram to explain a situation where multiple types of terminals coexist. As shown in Figure 2, existing UEs that communicate over a wide bandwidth and for a short period of time may coexist, as may IoT UEs that use narrower bandwidths, longer periods of time, and repetition, and sensing UEs that use narrower bandwidths and smaller amounts of information.

In this way, if functions are added for each use case/terminal in future wireless communication systems, it may become difficult to efficiently coexist with existing UEs.

(Outline of this embodiment)
Therefore, in order to address such problems of the conventional technology, this embodiment describes a communication method that uses both a baseline channel (first band) that can be received by any UE and an additional channel (second band) optimized for a specific UE/service. By using both the baseline channel and the additional channel, it becomes possible, for example, to maintain a connection using the baseline channel while using the additional channel for communication with additionally required resources.

Figure 3 is a diagram explaining the baseline channel and the additional channel. The terminal 20 uses both the signal in the baseline channel and the signal in the additional channel. For example, as shown in Figure 3, the terminal 20 may perform at least one of the following on the baseline channel: receiving an SSB (a block including a synchronization signal), transmitting a RACH (Random Access Channel), receiving Msg 2, transmitting Msg 3, receiving Msg 4, and then receiving a PDCCH, and transmitting a PUSCH/receiving a PDSCH scheduled by that PDCCH. The terminal 20 may also perform at least one of the following on the additional channel: receiving an SSB, transmitting a RACH, receiving a PDCCH, and then transmitting a PUSCH/receiving a PDSCH scheduled by that PDCCH.

However, when using both baseline channels and additional channels, it is necessary to consider specific methods for positioning.

Below, we will explain Examples 1, 2, and 3 as specific examples of positioning related to this embodiment.

Example 1
In this embodiment, an example will be shown in which the terminal 20 receives a downlink reference signal of a baseline channel related to positioning.

When the terminal 20 receives a downlink reference signal of the baseline channel related to positioning, it may calculate information related to positioning using the downlink reference signal of the baseline channel related to positioning and report it to the base station 10 via an uplink signal of the baseline channel or an additional channel (e.g., B-PUSCH, A-PUSCH, etc.).

Figure 4 is a sequence diagram showing an example of the flow of the positioning process according to Example 1. When starting communication with the terminal 20, the base station 10 transmits a baseline channel synchronization signal (B-SS; baseline-synchronization signal) to the terminal 20 (step S11).

Next, the base station 10 transmits a baseline channel reference signal (B-CRS; baseline-Cell-specific Reference Signal, B-TRS; baseline-Tracking Reference Signal, etc.) related to time/frequency synchronization (step S12).

The base station 10 then transmits a baseline channel reference signal related to positioning (step S13). Upon receiving the baseline channel reference signal related to positioning, the terminal 20 performs positioning and transmits a baseline channel shared channel (B-PUSCH) including the positioning results to the base station 10 (step S14).

Figure 5 is a diagram for explaining the positioning process according to Example 1. As shown in Figure 5, the base station 10 and the terminal 20 may perform positioning using only the baseline channel signal.

Instead of receiving a downlink reference signal of a baseline channel related to positioning (B-PRS; baseline-positioning reference signal, B-SS, B-CSI-RS; baseline-Channel Status Information reference signal, etc.), the terminal 20 may transmit an uplink reference signal of a baseline channel related to positioning (B-SRS; baseline-Sounding Reference Signal, etc.). Hereinafter, the downlink reference signal of a baseline channel related to positioning and the uplink reference signal of a baseline channel related to positioning are collectively referred to as the reference signals of the baseline channel related to positioning.

The transmission resources for the baseline channel reference signal related to positioning may be specified in the specifications, may be set in a broadcast signal or a higher layer signal transmitted on the baseline channel or additional channel, or may be notified in a DCI transmitted on the baseline channel or additional channel.

Furthermore, the base station 10 may transmit the downlink reference signal of the baseline channel related to positioning periodically, may semi-persistently activate or deactivate it, or may transmit it aperiodically. Similarly, the terminal 20 may transmit the uplink reference signal of the baseline channel related to positioning periodically, may semi-persistently activate or deactivate it, or may transmit it aperiodically.

The baseline channel reference signal for positioning may be capable of being transmitted and received by terminals 20 of any type or terminal capability, and may not be capable of being transmitted and received by some terminals 20 specified by the specifications.

The terminal 20 may be assumed to transmit and receive the baseline channel reference signal for positioning multiple times. This allows positioning to be achieved even when the baseline channel bandwidth is small.

Example 2
In this embodiment, an example will be shown in which the terminal 20 receives a downlink reference signal of an additional channel related to positioning.

When the terminal 20 receives a notification indicating the setting for the reference signal of the additional channel related to positioning, the terminal 20 may receive the reference signal of the additional channel related to positioning.

In addition, when the terminal 20 receives a notification indicating the presence of a downlink reference signal of an additional channel related to positioning, the terminal 20 may receive the downlink reference signal of the additional channel related to positioning. In this case, the settings related to the downlink reference signal of the additional channel related to positioning may be defined in the specifications.

Furthermore, when the terminal 20 receives a notification indicating the absence of a downlink reference signal of an additional channel related to positioning, it may not receive a downlink reference signal of an additional channel related to positioning, and when it does not receive a notification indicating the absence of a downlink reference signal of an additional channel related to positioning, it may receive a downlink reference signal of an additional channel related to positioning. The behavior of the terminal 20 in this case may be defined in the specifications.

Furthermore, when terminal 20 does not receive a notification indicating the presence or absence of a downlink reference signal of an additional channel related to positioning, terminal 20 may receive a downlink reference signal of an additional channel related to positioning, or may not receive a downlink reference signal of an additional channel related to positioning. The behavior of terminal 20 in this case may be defined in the specifications.

When the terminal 20 receives a downlink reference signal of an additional channel related to positioning, it may calculate information related to positioning using the downlink reference signal of the additional channel related to positioning and report it to the base station 10 via an uplink signal of a baseline channel or an additional channel (e.g., B-PUSCH, A-PUSCH, etc.).

Figure 6 is a sequence diagram showing an example of the flow of positioning processing according to Example 2. When starting communication with terminal 20, base station 10 transmits a synchronization signal of an additional channel to terminal 20 (step S21).

Next, the base station 10 transmits a reference signal for an additional channel related to time/frequency synchronization (step S22).

The base station 10 then transmits a reference signal for the additional channel related to positioning (step S23). Upon receiving the reference signal for the additional channel related to positioning, the terminal 20 performs positioning and transmits a shared channel (A-PUSCH) for the additional channel including the positioning results to the base station 10 (step S24).

Figure 7 is a diagram for explaining the positioning process according to Example 2. As shown in Figure 7, the base station 10 and the terminal 20 may perform positioning using only additional channel signals.

Instead of receiving downlink reference signals of additional channels related to positioning (A-PRS; additional-positioning reference signal, A-SS, A-CSI-RS; additional-Channel Status Information reference signal, etc.), the terminal 20 may transmit uplink reference signals of additional channels related to positioning (A-SRS; additional-Sounding Reference Signal, etc.). Hereinafter, the downlink reference signals of additional channels related to positioning and the uplink reference signals of additional channels related to positioning are collectively referred to as reference signals of additional channels related to positioning.

The transmission resources for the reference signal of the additional channel related to positioning may be specified in the specifications, may be set in a broadcast signal or a higher layer signal transmitted on the baseline channel or additional channel, or may be notified in the DCI transmitted on the baseline channel or additional channel.

Furthermore, the base station 10 may periodically transmit the downlink reference signal of the additional channel related to positioning, may semi-permanently activate or deactivate it, or may transmit it aperiodically. Similarly, the terminal 20 may periodically transmit the uplink reference signal of the additional channel related to positioning, may semi-permanently activate or deactivate it, or may transmit it aperiodically.

Reference signals for additional channels related to positioning may be transmitted and received by terminals 20 of a particular type or with particular terminal capabilities.

Furthermore, the baseline channel signal related to positioning and the additional channel signal may be multiplexed in time, frequency, or code within the same BWP in the same cell or in different BWPs, or may be transmitted in different cells. In other words, a common BWP may be defined or set for the baseline channel and the additional channel, or separate BWPs may be defined or set.

Example 3
In this embodiment, an example will be shown in which the terminal 20 transmits and receives both a reference signal of a baseline channel related to positioning and a reference signal of an additional channel related to positioning.

Figure 8 is a diagram for explaining the positioning process according to Example 3. As shown in Figure 8, the terminal 20 receives both a reference signal of a baseline channel related to positioning and a reference signal of an additional channel related to positioning.

The terminal 20 may assume that a reference signal corresponding to a scheduled channel is transmitted only when the positioning result of the baseline channel or additional channel is triggered. For example, the terminal 20 may assume cross-carrier scheduling. Also, the A-PUSCH containing the positioning result may be triggered by the B-PDCCH.

As shown in Figure 8, the terminal 20 may perform positioning using both the reference signal of the baseline channel related to positioning and the reference signal of the additional channel related to positioning when they overlap in the time domain.

The terminal 20 may assume that the number of times that the reference signal for the baseline channel related to positioning is transmitted and received is different from the number of times that the reference signal for the additional channel related to positioning is transmitted and received. For example, the number of times that the reference signal for the baseline channel related to positioning is transmitted and received may be greater than the number of times that the reference signal for the additional channel related to positioning is transmitted and received. This allows positioning to be achieved while distributing the load on each channel, even if the bandwidth of the baseline channel is small.

(Effects of the wireless communication system according to this embodiment)
In the wireless communication system according to this embodiment, the terminal 20 transmits and receives a reference signal of a baseline channel related to positioning. This enables the terminal 20 to appropriately perform positioning when the baseline channel and the additional channel are used in combination, and enables the terminal 20 to appropriately use resources according to its capabilities.

In addition, the terminal 20 transmits and receives reference signals for additional channels related to positioning. This allows the terminal 20 to effectively utilize additional channels to perform appropriate positioning, for example, when the bandwidth of the baseline channel is small.

The technology related to this embodiment described above provides technology that enables appropriate use of resources according to capabilities.

(Device configuration)
Next, an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above will be described.

<Base station 10>
FIG. 9 is a diagram showing an example of the functional configuration of the base station 10. As shown in FIG. 9, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 9 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations related to the embodiment of the present invention. Furthermore, the transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

The transmitter 110 has the function of generating signals to be transmitted to the terminal 20 and transmitting these signals wirelessly. The receiver 120 has the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, information of higher layers from the received signals. The transmitter 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DCI via PDCCH, data via PDSCH, etc. to the terminal 20.

The setting unit 130 stores pre-set setting information and various setting information to be transmitted to the terminal 20 in a storage device provided in the setting unit 130, and reads it from the storage device as needed.

The control unit 140 schedules DL reception or UL transmission of the terminal 20 via the transmission unit 110. The control unit 140 also includes a function for performing LBT. The functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the reception unit 120. The transmission unit 110 may also be called a transmitter, and the reception unit 120 may also be called a receiver.

<Terminal 20>
Fig. 10 is a diagram showing an example of the functional configuration of the terminal 20. As shown in Fig. 10, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 10 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals. The receiver 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, DCI via PDCCH, data via PDSCH, etc. transmitted from the base station 10. Furthermore, for example, the transmitting unit 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), or the like to another terminal 20 as D2D communication, and the receiving unit 120 may receive the PSCCH, the PSSCH, the PSDCH, the PSBCH, or the like from the other terminal 20.

The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10 or other terminals in a storage device provided in the setting unit 230, and reads it from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The control unit 240 controls the terminal 20. The control unit 240 also includes a function to perform LBT.

The terminal of this embodiment may be configured as the terminal shown in each of the following items. The following communication methods may also be implemented.

<Configuration of this embodiment>
(Section 1)
a receiving unit that receives, within the first band, information about the second band;
a control unit that uses both the signal in the first band and the signal in the second band,
the receiving unit receives a reference signal in the first band related to positioning;
Terminal.
(Section 2)
the receiving unit further receives a reference signal of the second band related to positioning.
2. The terminal according to claim 1.
(Section 3)
the receiving unit performs positioning using the reference signal of the first band related to positioning and the reference signal of the second band related to the second band related to positioning when the reference signal of the first band related to positioning and the reference signal of the second band related to the second band related to positioning overlap in a time domain;
3. The terminal according to claim 2.
(Section 4)
a transmitter that transmits information about the second band within the first band;
a control unit that uses both the signal in the first band and the signal in the second band,
the transmitter transmits a reference signal in the first band related to positioning;
Terminal.
(Section 5)
the transmitter further transmits a reference signal in the second band related to positioning.
5. A terminal according to claim 4.
(Section 6)
receiving, within the first band, information relating to the second band;
using both signals in the first band and signals in the second band;
receiving a reference signal in the first band related to positioning;
The communication method implemented by the device.

Any of the above configurations provides technology that enables appropriate use of resources according to capabilities. According to paragraph 2, it is possible to receive a reference signal in the second band related to positioning. According to paragraph 3, it is possible to distribute the load related to positioning. According to paragraph 4, it is possible to transmit a reference signal in the first band related to positioning. According to paragraph 5, it is possible to transmit a reference signal in the second band related to positioning.

(Hardware configuration)
The block diagrams (FIGS. 9 and 10) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., wired, wireless, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission functions is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 in one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a memory device 1002, an auxiliary memory device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

In the following description, the term "apparatus" can be interpreted as a circuit, device, unit, etc. The hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

Each function in the base station 10 and the terminal 20 is realized by loading specified software (programs) onto hardware such as the processor 1001 and the memory device 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) that includes an interface with peripheral devices, a control unit, an arithmetic unit, registers, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

The processor 1001 also reads programs (program code), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with these. The program used is a program that causes a computer to execute at least some of the operations described in the above-mentioned embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 9 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. For example, the control unit 240 of the terminal 20 shown in FIG. 10 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the various processes described above have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may also be transmitted from a network via a telecommunications line.

Memory device 1002 is a computer-readable recording medium and may be composed of at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Memory device 1002 may also be referred to as a register, cache, main memory, etc. Memory device 1002 can store executable programs (program code), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.

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

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, network controller, network card, or communication module. The communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmitting/receiving antenna, amplifier unit, transmitting/receiving unit, transmission path interface, etc. may be realized by the communication device 1004. The transmitting/receiving unit may be implemented as a physically or logically separated transmitting unit and receiving unit.

The input device 1005 is an input device (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).

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

Furthermore, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

(Supplementary explanation of the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values are merely examples, and any appropriate values may be used. The division of items in the above description is not essential to the present invention; matters described in two or more items may be used in combination as needed, and matters described in one item may apply to matters described in another item (unless inconsistent). Boundaries between functional units or processing units in functional block diagrams do not necessarily correspond to boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

Furthermore, notification of information is not limited to the aspects/embodiments described in this disclosure and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., DCI, UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

The aspects/embodiments described in this disclosure may be implemented in a variety of mobile communication systems, including LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE The present invention may be applied to at least one of systems using 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems extended based on these. In addition, the present invention may be applied to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).

The order of the procedures, sequences, flowcharts, etc. of each aspect/embodiment described herein may be rearranged unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

Specific operations described herein as being performed by the base station 10 may in some cases be performed by its upper node. In a network consisting of one or more network nodes including the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW). While the above example illustrates a case where there is one other network node other than the base station 10, the other network node may also be a combination of multiple other network nodes (such as an MME and an S-GW).

The information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may also be input and output via multiple network nodes.

Input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

In this disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

Software, instructions, information, etc. may also be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then these wired and/or wireless technologies are included within the definition of transmission media.

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

Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

As used in this disclosure, the terms "system" and "network" are used interchangeably.

Furthermore, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values from a predetermined value, or other corresponding information. For example, radio resources may be indicated by an index.

The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical formulas, etc. using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

In this disclosure, terms such as "base station (BS)," "radio base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission/reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The terms "cell" or "sector" refer to part or all of the coverage area of a base station and/or base station subsystem that provides communication services within this coverage area.

In this disclosure, terms such as "Mobile Station (MS)," "User Terminal," "User Equipment (UE)," and "Terminal" may be used interchangeably.

A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the mobile body itself. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

Furthermore, the term "base station" in the present disclosure may be read as "terminal." For example, each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals 20 (which may be referred to as, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions possessed by the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as "uplink channel" and "downlink channel" may be read as "side channel."

Similarly, the term "terminal" in this disclosure may be interpreted as "base station." In this case, the base station may be configured to have the functions of the terminal described above.

As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), and ascertaining something as a "determining" or "determining." Furthermore, "judgment" and "decision" may include regarding receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory) as having been "judgment" or "decision." Furthermore, "judgment" and "decision" may include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judgment" or "decision." In other words, "judgment" and "decision" may include regarding some action as having been "judgment" or "decision." Furthermore, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and/or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

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

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

As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

A slot may consist of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol). A slot may also be a time unit based on numerology.

A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Other names may also be used for radio frame, subframe, slot, minislot, and symbol.

For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. In other words, at least one of the subframe and the TTI may be a subframe (1 ms) as in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe. Furthermore, one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.

Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station schedules each terminal 20 by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) in TTI units. Note that the definition of TTI is not limited to this.

A TTI may be a transmission time unit for a channel-coded data packet (transport block), code block, code word, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the smallest time unit for scheduling. Furthermore, the number of slots (minislots) that constitute the smallest time unit for scheduling may be controlled.

A TTI with a time length of 1 ms may be referred to as a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than that of a long TTI and greater than or equal to 1 ms.

A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

Furthermore, the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. One TTI, one subframe, etc. may each consist of one or more resource blocks.

In addition, one or more RBs may also be referred to as a physical resource block (PRB), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

A resource block may also be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWPs may include a BWP for the UL (UL BWP) and a BWP for the DL (DL BWP). One or more BWPs may be configured for a UE within one carrier.

At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

The above-described structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in various ways.

In this disclosure, where articles are added by translation, such as a, an, and the in English, this disclosure may include the noun following these articles being plural.

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

Each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation. Furthermore, notification of specified information (e.g., notification that "X is true") is not limited to being done explicitly, but may also be done implicitly (e.g., not notifying the specified information).

Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

10 Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims (3)

a receiver that receives a reference signal related to positioning in at least one of a first band and a second band;
a control unit that performs positioning based on the reference signal related to the positioning and acquires a positioning result;
a transmitter that transmits the position measurement result ,
The receiving unit
receiving a notification indicating the presence of a reference signal related to the positioning in the second band;
when not receiving a notification indicating the presence of a reference signal related to the positioning in the second band, not receiving the reference signal related to the positioning in the second band;
When the receiver receives downlink control information in the first band that triggers the positioning result in the second band, the transmitter transmits the positioning result in the second band.
Terminal. When the reference signal related to the positioning in the first band and the reference signal related to the positioning in the second band overlap in a time domain, the receiving unit:
performing positioning using the reference signal for the positioning in the first band and the reference signal for the positioning in the second band;
The terminal according to claim 1 . receiving a reference signal for positioning in at least one of a first band and a second band;
performing positioning based on the reference signal related to the positioning and obtaining a positioning result;
transmitting the positioning result;
receiving, when receiving a notification indicating the presence of a reference signal related to the positioning in the second band, the reference signal related to the positioning in the second band;
not receiving the reference signal related to the positioning in the second band when a notification indicating the presence of the reference signal related to the positioning in the second band is not received;
transmitting the positioning result in the second band when receiving downlink control information in the first band, the downlink control information triggering the positioning result in the second band;
The communication method implemented by the device.