Terminal, system and communication method

Abstract

This terminal comprises a control unit for generating Capability information that includes the Power Class of the terminal, and a transmission unit for transmitting the Capability information. For the Power Class, there are prescribed Max Total Radiated Power (TRP), Max peak Equivalent Isotropic Radiated Power (EIRP), Min peak EIRP, and Spherical coverage EIRP. The method of determining the prescribed value of at least one of the Max peak EIRP and the Max TRP in Inter-band Carrier Aggregation (CA) depends on the relationship of operating bands of two Component Carriers (CC) that constitute the Inter-band CA.

Description

[Technical field]

[0001] The present disclosure relates to a terminal, a system, and a communication method. [Background technology]

[0002] In a Universal Mobile Telecommunication System (UMTS) network, a successor system to Long Term Evolution (LTE) is under consideration (Non-Patent Document 1). Examples of successor systems to LTE include LTE-Advanced (LTE-A), Future Radio Access (FRA), 5th generation mobile communication system (5G), 5G+ (5G plus), and New-RAT (Radio Access Technology; NR).

[0003] 3GPP specifies maximum transmission power for each Power Class (hereinafter sometimes abbreviated as "PC") for Sub6 (LTE / NR FR (Frequency Range) 1), which is a frequency band below 6 GHz including the 3.7 GHz and 4.5 GHz bands, and for the millimeter wave band (NR FR2), such as the 28 GHz and 38 GHz bands.

[0004] In addition, 3GPP specifies n257 (Uplink: 26500MHz-29500MHz, Downlink: 26500MHz-29500MHz), n258 (Uplink: 24250MHz-27500MHz, Downlink: 24250MHz-27500MHz), and n261 (Uplink: 27500MHz-28350MHz, Downlink: 27500MHz-28350MHz) as operating bands belonging to the 28GHz band, and n259 (Uplink: 39500MHz-43500MHz, Downlink: 39500MHz-43500MHz) and n260 (Uplink: 37000MHz-40000MHz, Downlink: 37000MHz-40000MHz) are specified (see Non-Patent Document 1).

[0005] A power class is set for each terminal at the time of shipment from the factory, and when transmitting a radio signal, the transmission power is controlled so as to satisfy the transmission power regulation of the power class. Furthermore, when starting communication, each terminal notifies the base station of information indicating UE capability including the power class (hereinafter referred to as "capability information").

[0006] In 3GPP, the Sub6 power classes are specified from PC1 to PC4, and the FR2 power classes are specified from PC1 to PC4. FR2 PC1 is for fixed wireless communication, and FR2 PC2 is for in-vehicle use.

[0007] Sub6 uses non-directional omni-antennas, and each power class is defined by its total radiated power (TRP), which is the total power radiated into space.

[0008] In FR2, power is radiated (beamforming) by forming directivity using an array antenna, and four items are specified for each frequency band and each power class: Max TRP, Max peak EIRP (Equivalent Isotropic Radiated Power), Min peak EIRP, and Spherical coverage EIRP (see Non-Patent Document 1). Note that EIRP is the composite value of transmission power and antenna gain.

[0009] For example, in the case of FR2 PC3 (28 GHz band), the following are required (see Figure 3): Max TRP≦23 dBm, Max peak EIRP≦43 dBm, Min peak EIRP≧22.4 dBm, Spherical coverage EIRP≧(11.5 dBm, 50%-tile CDF). When transmitting wireless signals, PC3 terminals control the transmission power so as to satisfy all of these four regulations.

[0010] Spherical coverage EIRP is a regulation of the spatial power (EIRP) distribution around a terminal, which contributes to the connectivity between the terminal and the base station, and is regulated by the %-tile from the upper limit of the CDF (Cumulative Distribution Function). For example, PC4's spherical coverage EIRP ≥ (25.0 dBm, 20%-tile CDF) means that the EIRP is 25 dBm or less at 20% of the CDF points, that is, it exceeds 25 dBm at 80% of all measurement points in space. [Prior art documents] [Non-patent literature]

[0011] [Non-Patent Document 1] 3GPP TS 38.101-2 V16.4.0 (2020-06) Summary of the Invention [Problem to be solved by the invention]

[0012] Until now, 3GPP has specified the total power of Max TRP of each CC, the total power of Max peak EIRP of each CC, the total power of Min peak EIRP of each CC, and the total power of Spherical coverage EIRP of each CC in FR2 Intra-band Carrier Aggregation (CA), based on the premise that consecutive CCs (Component Carriers) in the same band radiate radio waves simultaneously in the same direction.

[0013] However, in FR2 Inter-band CA, there may be cases where radio waves are radiated in multiple directions simultaneously from the same or different antenna panels in multiple CCs. Even when radio waves are radiated in the same direction in different frequency bands from one antenna panel, the directivity of the beam may change due to the frequency characteristics caused by the difference in frequency band.

[0014] And the calculation of EIRP or TRP needs to take into account spatial directivity.

[0015] Therefore, for FR2 Inter-band CA, it is desirable to newly determine the specified values ​​for each item such as Max peak EIRP (hereinafter referred to as "radiated power specified value"), taking into account the direction of radio wave emission. Furthermore, it is desirable to determine the radiated power specified value for FR2 Inter-band CA, taking into account the relationship between the operating bands of the two CCs that make up the Inter-band CA.

[0016] One of the objectives of the present disclosure is to propose a method for determining a specified value of radiated power in Inter-band CA of FR2, taking into consideration the relationship between the operating bands of two CCs. [Means for solving the problem]

[0017] A terminal according to one embodiment of the present disclosure includes a control unit that generates capability information including a power class of the terminal, and a transmission unit that transmits the capability information, and for the power class, Max TRP (Total Radiated Power), Max peak EIRP (Equivalent Isotropic Radiated Power), Min peak EIRP, and Spherical coverage EIRP are specified, and in Inter-band Carrier Aggregation (CA), the method of determining the specified value of at least one of the Max peak EIRP and the Max TRP depends on the relationship between the operating bands of two CCs (Component Carriers) that constitute the Inter-band CA.

[0018] A system according to one embodiment of the present disclosure generates capability information including a power class of a terminal, and includes a terminal that transmits the capability information, and a base station that receives the capability information. For the power class, Max TRP (Total Radiated Power), Max peak EIRP (Equivalent Isotropic Radiated Power), Min peak EIRP, and Spherical coverage EIRP are specified. In Inter-band Carrier Aggregation (CA), the method of determining the specified value of at least one of the Max peak EIRP and the Max TRP depends on the relationship between the operating bands of two CCs (Component Carriers) that constitute the Inter-band CA.

[0019] In a communication method according to one embodiment of the present disclosure, a terminal generates capability information including a power class of the terminal, transmits the capability information, and specifies Max TRP (Total Radiated Power), Max peak EIRP (Equivalent Isotropic Radiated Power), Min peak EIRP, and Spherical coverage EIRP for the power class, and in Inter-band Carrier Aggregation (CA), the method of determining the specified value of at least one of the Max peak EIRP and the Max TRP depends on the relationship between the operating bands of two CCs (Component Carriers) that constitute the Inter-band CA. Effect of the Invention

[0020] According to the present disclosure, it is possible to determine the specified radiation power value in Inter-band CA of FR2 by taking into consideration the relationship between the operating bands of two CCs. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is a block diagram showing a configuration example of a base station. [Diagram 2] FIG. 2 is a block diagram showing a configuration example of a terminal. [Diagram 3] FIG. 11 is a diagram showing the prescribed values ​​of each item for each power class for each band of FR2. [Figure 4] FIG. 11 is a diagram showing examples of numerical values ​​of plan A1-1 to plan A1-3 in plan A1 according to an embodiment of the present disclosure. [Diagram 5] FIG. 2 is a diagram showing, by mathematical expressions, plan A1-1 to plan A1-3 in plan A1 according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a diagram illustrating an example of the hardware configuration of a base station and a terminal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The present disclosure has been made to solve the above problems. Hereinafter, one embodiment of the present disclosure will be described with reference to the drawings.

[0023] [Wireless communication system configuration] The wireless communication system according to the present embodiment includes a base station 10 (see FIG. 1) and a terminal 20 (see FIG. 2). The base station 10 transmits a DL signal to the terminal 20. The base station 10 also receives a UL signal transmitted from the terminal 20. The terminal 20 receives the DL signal transmitted from the base station 10, and transmits a UL signal to the base station 10.

[0024] [Configuration of base station 10] 1 is a block diagram showing an example of the configuration of a base station 10 according to the present embodiment. The base station 10 includes, for example, a control unit 101, a transmission unit 102, and a reception unit 103.

[0025] The control unit 101 controls the transmission process in the transmission unit 102 and the reception process in the reception unit 103 .

[0026] For example, the control unit 101 performs scheduling (e.g., resource allocation) of DL data signals transmitted on the PDSCH and DL control signals transmitted on the PDCCH. The control unit 101 also performs scheduling of DL reference signals such as synchronization signals (PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)), CRS, and CSI-RS.

[0027] Furthermore, control unit 101 performs scheduling of a UL data signal transmitted on a PUSCH, a UL control signal transmitted on a PUCCH, a random access preamble transmitted on a PRACH, a UL reference signal, and the like.

[0028] Furthermore, the control unit 101 performs operations such as selecting a cell for connecting the terminal 20 based on an RRM report that is included in the UL signal and indicates the measurement result of the reception quality.

[0029] The transmission unit 102 transmits a signal (DL signal) intended for the terminal 20 to the terminal 20 under the control of the control unit 101.

[0030] The DL signal includes, for example, DL data (e.g., sometimes referred to as a PDSCH signal), DL control information (e.g., sometimes referred to as a PDCCH signal, where PDCCH includes DCI (Downlink Control Information)), reference signals, etc. The DL control information includes, for example, an RA message (e.g., sometimes referred to as an RAR (Random Access Response) or message 2) including a TA (Timing Advance) command, information indicating UL resource configuration (scheduling instruction), NS (Network Signaling), etc.

[0031] Furthermore, the DL control information may be notified to the terminal 20 by, for example, higher layer signaling, or may be notified to the terminal 20 by dynamic signaling such as DCI. The higher layer signaling may also be called, for example, Radio Resource Control (RRC) signaling or higher layer parameters.

[0032] Under the control of the control unit 101, the receiving unit 103 receives a signal (UL signal) transmitted from the terminal 20.

[0033] The UL signal includes, for example, UL data (e.g., sometimes referred to as a PUSCH signal), UL control information (e.g., sometimes referred to as a PUCCH signal), a reference signal (e.g., an SRS), an RA signal, etc. The UL control information includes, for example, an RRM report, etc.

[0034] [Terminal 20 Configuration] 2 is a block diagram showing an example of a configuration of terminal 20 according to the present embodiment. Terminal 20 includes, for example, control unit 201, transmission unit 202, reception unit 203, and measurement unit 204.

[0035] The control unit 201 controls the transmission process in the transmission unit 202 and the reception process in the reception unit 203 .

[0036] For example, the control unit 201 may generate capability information indicating the capabilities of the terminal 20, and transmit the information from the transmission unit 202 to the base station 10. Furthermore, the control unit 201 may control the transmission power of the UL signal so as to satisfy the power class regulations of the terminal 20. Furthermore, the control unit 201 may generate an RRM report based on the measurement result of the measurement unit 204, and transmit the information from the transmission unit 202 to the base station 10.

[0037] Under the control of the control unit 201, the transmission unit 202 transmits the UL signal to the base station 10.

[0038] The receiving unit 203 receives the DL signal transmitted from the base station 10 under the control of the control unit 201 .

[0039] The measurement unit 204 measures the reception quality of the signal received by the receiving unit 203, and outputs the measurement result to the control unit 203. Values ​​indicating the reception quality include the reception power of the received signal (e.g., Reference Signal Received Power (RSRP)), the reception signal strength (e.g., Received Signal Strength Indicator (RSSI)), and the reception quality (e.g., Reference Signal Received Quality (RSRQ)).

[0040] [Radiation power standard value in Inter-band CA] Next, a method for determining the specified value of radiation power in Inter-band CA in FR2 will be described.

[0041] Fig. 3 is a diagram showing the radiated power specification values ​​for each item for each power class for each band of FR2 described in Non-Patent Document 1. As shown in Fig. 3, currently, four power classes (PC1 to PC4) are specified in FR2 for each of the 28 GHz band and the 38 GHz band. Radiated power specification values ​​are specified for four items, Max TRP, Max peak EIRP, Min peak EIRP, and Spherical coverage EIRP, for each power class. For example, the specified value of Max TRP for PC1 in the 28 GHz band is "35 dBm."

[0042] However, as described above, the existing radiation power standard value in FR2 Inter-band CA does not take into account the case where radio waves are simultaneously emitted in a plurality of directions.

[0043] Therefore, the present inventors propose to introduce a new radiation power regulation value in the FR2 Inter-band CA based on the existing FR2 Power Class regulation.

[0044] Below, we propose how to determine the specified value of Max peak EIRP using an example of Inter-band CA using two frequency bands, 28 GHz (first band) and 38 GHz (second band).

[0045] <Plan 1> In Proposal 1, the 28GHz EIRP and 38GHz EIRP are measured at the measurement points in each beam direction using a test device, the total power of the 28GHz EIRP and 38GHz EIRP are calculated at the measurement points in each beam direction, and the maximum value of the total power is set as the specified value for Max peak EIRP. In other words, Proposal 1 sets the 28GHz beam and the 38GHz beam in the same direction, and sets the specified value for Max peak EIRP based on the total power of the EIRP in each direction.

[0046] According to this proposal, it is possible to guarantee the total power limit of each beam in the same direction. Therefore, it is possible to guarantee that the maximum EIRP limit set by the laws and regulations of each country is not exceeded. Furthermore, even if a maximum EIRP limit is required in a specific area (e.g., hospital, etc.), it is possible to guarantee that the maximum EIRP limit is not exceeded. In addition, since only the total power of each beam direction is determined, there is a degree of freedom in allocating EIRP. Therefore, it is possible to intentionally adjust one of the beams to a higher power depending on the distance to the connected base station, thereby improving connectivity, etc.

[0047] <Plan 2> In Proposal 2, the EIRP of the 28 GHz band and the 38 GHz band are measured at the measurement point of each beam direction using a test equipment, and the total power of the maximum EIRP of the 28 GHz band and the maximum EIRP of the 38 GHz band is set as the specified value of Max peak EIRP. In other words, Proposal 2 measures the EIRP of the 28 GHz band and the 38 GHz band separately at the measurement point of each beam direction, and sets the specified value of Max peak EIRP based on the total power of the maximum EIRP of each frequency band, regardless of whether the beam direction is the same or different.

[0048] According to this proposal, since it is not dependent on the beam direction, there is no need to know the total EIRP power in the same direction, so terminal implementation can be simplified and development costs can be expected to be reduced. In addition, since the Max peak EIRP value is determined based on the total power, regardless of the beam direction, the total power limit for each beam can be guaranteed, just like Proposal 1.

[0049] <Plan 3> In Proposal 3, the EIRP of the 28 GHz band and the 38 GHz band are measured at the measurement point of each beam direction using a test equipment, and the maximum value of the 28 GHz band and the maximum value of the 38 GHz band are set as the specified value of Max peak EIRP independently. In other words, Proposal 2 sets the specified value of Max peak EIRP based on the maximum value of the EIRP of each frequency band, regardless of the difference in the beam direction.

[0050] According to this proposal, since it is based on the maximum EIRP value of each frequency band regardless of the beam direction, the terminal can independently control the RF of each frequency band with regard to EIRP control, which simplifies terminal implementation and reduces development costs compared to proposal 2. In addition, since the EIRP is specified independently, rather than the total power, the minimum EIRP allocation that is desired to be guaranteed can also be guaranteed.

[0051] <Plan 4> Proposal 4 measures the 28GHz EIRP and 38GHz EIRP at the measurement points in each beam direction using a test device, calculates the total power of the 28GHz EIRP and 38GHz EIRP at the measurement points in each beam direction, sets the maximum total power as the specified value of Max peak EIRP, and sets the 28GHz EIRP and 38GHz EIRP in the beam direction where the total power is maximum as the specified value of Max peak EIRP. In other words, Proposal 4 sets the specified value of Max peak EIRP based on the total power of the EIRP in each direction and the individual EIRP of each frequency band in the beam direction where the total power is maximum, with the 28GHz beam and the 38GHz beam in the same direction.

[0052] According to this proposal, the total power limit for each beam can be guaranteed, just like Proposal 1. Also, like Proposal 3, the EIRP is specified independently, so the minimum EIRP allocation that is desired to be guaranteed can also be guaranteed.

[0053] In addition, in the case of testing when multiple beams are radiated, the EIRP may be measured by transmitting in a time-division manner in the bands that constitute the Inter-band CA. For example, since the TDD (Time Division Duplex) method is used in the FR2 band, the UL configuration of the TDD configuration may be divided and used for each frequency band to measure the EIRP. In particular, the above test method is effective because the test environment for millimeter wave communication is OTA (Over The Air), and in an environment where multiple frequencies are mixed, it may be difficult to measure multiple beams radiated simultaneously from a terminal due to the influence of interference waves and noise. The OTA test environment is a measurement system that radiates radio waves into real space and performs tests, unlike the conducted (wired) test environment that has been used in Sub6 RF tests, where the RF port of the terminal is connected to the measuring device by wire and tests are performed.

[0054] Note that Min peak EIRP and Max peak EIRP represent the minimum and maximum values ​​of Peak EIRP, i.e., the range recognized as Peak EIRP, as shown below. Min peak EIRP ≦ Peak EIRP ≦ Max peak EIRP

[0055] The above methods 1 to 4 are methods for specifying Peak EIRP, so for Min peak EIRP as well, the Peak EIRP at which the EIRP is at its maximum is measured, and then it is confirmed whether the Peak EIRP is equal to or greater than the Min Peak EIRP.

[0056] [effect] As described above, according to this embodiment, it is possible to determine the specified radiation power value in Inter-band CA of FR2, taking into consideration the case where radio waves are simultaneously radiated in a plurality of directions.

[0057] [Variations] <Variation A> Variation A proposes a method for determining the specified value of Max TRP when the specified value of radiated power for each frequency band is determined independently, as in Proposal 3 or Proposal 4 above.

[0058] <Plan A1> Proposal A1 defines the specified value of Max TRP so that the total power of Max TRP in Inter-band CA is the same as the value during single carrier transmission. For example, the Max TRP of PC3 during CA between the 28 GHz band and the 38 GHz band is 23 dBm (see Figure 3). Furthermore, the method of defining the specified values ​​of Min peak EIRP, etc. in Proposal A1 is explained below.

[0059] <Plan A1-1> Proposal A1-1 specifies the Min peak EIRP value assuming the same TRP for the 28 GHz and 38 GHz bands. It also specifies the Spherical coverage EIRP value accordingly.

[0060] <Plan A1-2> Proposal A1-2 specifies the same Min peak EIRP value for the 28 GHz and 38 GHz bands. It also specifies the Spherical coverage EIRP value accordingly. By specifying the same Min peak EIRP, it is possible to improve the connectivity of CA.

[0061] <Plan A1-3> Proposal A1-3 sets the standard value of the Min Peak EIRP so that the Min Peak EIRP in the 38 GHz band is higher than that in the 28 GHz band. It also sets the standard value of the Spherical Coverage EIRP accordingly. Because the propagation loss in the 38 GHz band is higher than that in the 28 GHz band (there is a difference of about 2.6 dB over the same distance), it is possible to improve the connectivity of CA by increasing the Min Peak EIRP in the 38 GHz band.

[0062] In addition, in the case of Proposal A1-2 and Proposal A1-3, the specified value may be determined similarly based on the Spherical coverage EIRP instead of the Min peak EIRP.

[0063] FIG. 4 is a diagram showing examples of numerical values ​​of plans A1-1 to A1-3 in the plan A1.

[0064] FIG. 5 is a diagram in which plans A1-1 to A1-3 in plan A1 are expressed by mathematical expressions.

[0065] <Plan A2> Proposal A2 specifies the Max TRP value so that the total power of the Max TRP in Inter-band CA is the sum of the respective values ​​during Single carrier transmission. For example, the total power of the Max TRP of PC3 in Inter-band CA between the 28 GHz band and the 38 GHz band is 26 dBm. In this case, the EIRP allocation for each frequency band is the specified value for Single carrier. For example, in the case of Inter-band CA between the 28 GHz band and the 38 GHz band, the specified values ​​of Max TRP are 22.4 dBm and 20.6 dBm, respectively.

[0066] <Plan A3> Proposal A3 specifies the Max TRP value in Inter-band CA independently for each frequency band.

[0067] In addition, in Proposal A3, an upper limit may be set for the total power of the TRP of each frequency band, and the prescribed value of Max TRP may be set independently for each frequency band. For example, the Max TRP in Inter-band CA of the 28 GHz band is set to 23 dBm, and the Max TRP in Inter-band CA of the 38 GHz band is set to 23 dBm.

[0068] In addition, in the plans A1 and A2, the total power of the Max TRP may be calculated after defining an upper limit for the specified value of the Max TRP of each frequency band. For example, the total power of the Max TRP in the Inter-band CA between the 28 GHz band and the 38 GHz band is set to 26 dBm.

[0069] <Variation B> In the above, we have explained how to determine the radiated power limit value by taking as an example the case where inter-band CA is performed using two separate frequency bands, 28 GHz and 38 GHz. This proposal can also be applied to cases where inter-band CA is performed using operating bands that belong to the same frequency band (28 GHz or 38 GHz) or using two partially overlapping operating bands.

[0070] Variation B proposes a method for determining the specified values ​​of Max peak EIRP and Max TRP, taking into account the relationship between the operating bands of the two CCs that make up Inter-band CA.

[0071] <Plan B1> As described above, 3GPP specifies n257, n258, and n261 as operating bands belonging to the 28 GHz band, and specifies n259 and n260 as operating bands belonging to the 38 GHz band.

[0072] Proposal B1 specifies different methods for determining the Max peak EIRP and Max TRP values ​​depending on whether the operating bands of two CCs that make up an Inter-band CA belong to the same frequency band or different frequency bands. For example, when the operating bands of two CCs belong to different frequency bands, such as n260 and n261, the Max peak EIRP (e.g., 43 dBm) and Max TRP (e.g., 23 dBm) are determined independently for each CC's operating band. Also, when the operating bands of two CCs belong to the same frequency band, such as n259 and n260, the total power of the maximum EIRP of each CC's operating band is set as the Max peak EIRP value, and the total power of the maximum TRP of each CC's operating band is set as the Max TRP value.

[0073] The upper limits of Max peak EIRP and Max TRP are set by taking into consideration the effect of interference on adjacent systems using adjacent frequencies as one of the factors. Therefore, when the operating bands of the two CCs that make up Inter-band CA belong to the same frequency band, it is preferable to set the specified values ​​of these items as the total power of Max peak EIRP and Max TRP. On the other hand, when the operating bands of the two CCs belong to different frequency bands, the specified values ​​of these items can be set independently.

[0074] <Plan B2> Proposal B2 determines the Max peak EIRP and Max TRP values ​​differently depending on whether the operating bands of two CCs that make up an Inter-band CA overlap or are separate. For example, when the operating bands of two CCs are separate, the Max peak EIRP and Max TRP values ​​are determined independently for each CC's operating band. Also, when the operating bands of two CCs overlap, the Max peak EIRP value is determined as the total power of the maximum EIRP of each CC's operating band, and the Max TRP value is determined as the total power of the maximum TRP of each CC's frequency band.

[0075] Note that "the operating bands of two CCs overlap" means that the operating bands of the two CCs are completely identical and that the upper end frequency of the operating band with the lower center frequency is higher than the lower end frequency of the operating band with the higher center frequency. On the other hand, "the operating bands of two CCs are separated" means that the upper end frequency of the operating band with the lower center frequency is equal to or lower than the lower end frequency of the operating band with the higher center frequency.

[0076] <Plan B3> Proposal B3 sets the method of determining the Max peak EIRP and Max TRP based on other signaling associated with Inter-band CA. An example of "other signaling" is Capability information that indicates whether the control of beams between CCs that make up Inter-band CA is independent or integrated.

[0077] [Effects of Variation B] As described above, according to Variation B, the specified value of the radiation power in Inter-band CA of FR2 can be determined in consideration of the relationship between the operating bands of the two CCs.

[0078] In addition, the above proposal may be applied as a provision for terminals that perform multi-beam radiation in the case of single carrier transmission.

[0079] In addition, the above proposal may also be applied to the provisions of Peak EIS (Effective Isotropic Sensitivity) or peak reference sensitivity, and EIS spherical coverage in Inter-band DL CA.

[0080] The embodiments of the present disclosure have been described above.

[0081] (Hardware configuration) The block diagrams 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. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0082] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission is called a transmitting unit or a transmitter. In either case, as described above, there is no particular limitation on the method of realization.

[0083] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 6 is a diagram showing an example of a hardware configuration of a base station 10 and a terminal 20 according to an 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 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0084] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the 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.

[0085] Each function in the base station 10 and the terminal 20 is realized by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications by a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0086] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control units 101, 201, etc. may be realized by the processor 1001.

[0087] Moreover, the processor 1001 reads out a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the read out programs. As the program, a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment is used. For example, the control units 101 and 201 of the base station 10 and the terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and other functional blocks may be similarly realized. Although the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed by two or more processors 1001 simultaneously or sequentially. The processor 1001 may be implemented by one or more chips. The program may be transmitted from a network via a telecommunication line.

[0088] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a Random Access Memory (RAM), etc. The memory 1002 may be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store a program (program code), software modules, etc. that are executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0089] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, 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, and the like. Storage 1003 may be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of memory 1002 and storage 1003.

[0090] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize, for example, at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmitting units 102 and 202, receiving units 103 and 203, measuring unit 204, etc. may be realized by the communication device 1004.

[0091] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0092] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0093] 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), and a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0094] (Information notification, signaling) The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or a combination thereof. In addition, the RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0095] (Adaptive Systems) Each aspect / embodiment described in the present disclosure may be implemented in accordance with LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4 th The present invention may be applied to at least one of a system using a suitable system, such as 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 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), and a next-generation system extended based on these. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A and 5G, etc.) may be applied.

[0096] (Processing procedures, etc.) The order of the steps, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be changed 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.

[0097] (Base Station Operation) In the present disclosure, a specific operation performed by a base station may be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and other network nodes other than the base station (e.g., MME or S-GW, etc., but are not limited to these). Although the above example illustrates a case in which there is one other network node other than the base station, it may also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0098] (Input / Output direction) Information, signals, etc. may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), and may be input / output via multiple network nodes.

[0099] (Handling of input and output information, etc.) The input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table. The input and output information may be overwritten, updated, or added to. The output information may be deleted. The input information may be transmitted to another device.

[0100] (Judgment method) The determination may be based on a value represented by a single bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0101] (software) 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.

[0102] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the 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, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0103] (Information, Signals) The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the 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.

[0104] In addition, the terms described in this disclosure and the 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). Also, a signal may be a message. Also, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0105] ("System", "Network") As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0106] (parameter, channel name) In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by an index.

[0107] The names used for the above-mentioned parameters are not limiting in any way. Moreover, the formulas 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 limiting in any way.

[0108] (base station) In this disclosure, terms such as "base station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0109] 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 term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0110] (Terminal) In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0111] 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.

[0112] (Base station / Mobile station) At least one of the base station and the mobile station may be called 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 moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving 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 include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0113] Furthermore, the base station in the present disclosure may be read as a user 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 user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0114] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0115] (Meaning and interpretation of terms) 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, search, inquiry (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), and the like. In addition, "judgment" and "decision" can include considering resolving, selecting, choosing, establishing, comparing, etc., to be a "judgment" or "decision." In other words, "judgment" and "decision" can include considering some action to be a "judgment" or "decision." In addition, "judgment" can be interpreted as "assuming," "expecting," "considering," etc.

[0116] 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 at least one of one or more wires, cables, and 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.

[0117] The reference signal may be abbreviated as RS (Reference Signal) and may be called a pilot depending on the applicable standard.

[0118] 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."

[0119] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure 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 precede the second element in some way.

[0120] The "part" in the configuration of each of the above devices may be replaced with "means," "circuit," "device," etc.

[0121] 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." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0122] 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.

[0123] Numerology may be a communication parameter that applies to the transmission and / or reception of a signal or channel, such as SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, a particular filtering operation performed by the transceiver in the frequency domain, a particular windowing operation performed by the transceiver in the time domain, etc.

[0124] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may be a time unit based on numerology.

[0125] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed 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.

[0126] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. The radio frame, the subframe, the slot, the minislot, and the symbol may each be referred to by a different name. 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. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit expressing the TTI may be called a slot, a minislot, or the like, instead of a subframe.

[0127] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0128] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0129] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0130] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0131] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0132] A resource block (RB) is a resource allocation unit in the time domain and the 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 the numerology, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0133] In addition, the time domain of the RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0134] Note that one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0135] Furthermore, a resource block may 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.

[0136] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0137] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0138] 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 replaced with "BWP".

[0139] The above-mentioned structures of radio frames, subframes, slots, minislots, symbols, etc. 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, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0140] In this disclosure, where articles have been added due to translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0141] (Variations of form, etc.) Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to execution. In addition, notification of specific information (e.g., notification that "X is the case") is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).

[0142] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure 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. [Industrial Applicability]

[0143] One aspect of the present disclosure is useful in wireless communication systems. [Explanation of symbols]

[0144] 10 base station 20 Terminals 101,201 Control section 102,202 Transmitter 103,203 Receiver 204 Measuring section

Claims

1. A control unit that generates capability information including a power class of a terminal; A transmission unit that transmits the capability information; Equipped with Max TRP (Total Radiated Power) and Max EIRP (Equivalent Isotropic Radiated Power) are specified for the Power Class, For Inter-band Carrier Aggregation (CA) using a first component carrier in a first band and a second component carrier in a second band different from the first band, a prescribed value of the Max TRP corresponding to the Power Class is determined independently for the first band and the second band, The control unit applies a Max TRP for the first band and a Max TRP for the second band corresponding to the Power Class to execute the Inter-band CA. Terminal.

2. For the Inter-band CA, a specified value of the Max EIRP corresponding to the Power Class is determined independently for the first band and the second band; The control unit applies a Max EIRP for the first band and a Max EIRP for the second band corresponding to the Power Class to perform the Inter-band CA. The terminal according to claim 1.

3. A terminal that generates capability information including a power class and transmits the capability information; A base station that receives the capability information; Equipped with Max TRP (Total Radiated Power) and Max EIRP (Equivalent Isotropic Radiated Power) are specified for the Power Class, In at least one of the power classes, in an inter-band CA (Carrier Aggregation) using two bands, the prescribed value of the Max TRP of a first band and the prescribed value of the Max TRP of a second band are determined independently of each other. system.

4. The terminal is Generates capability information including power class, Transmitting the capability information; Max TRP (Total Radiated Power) and Max EIRP (Equivalent Isotropic Radiated Power) are specified for the Power Class, For Inter-band Carrier Aggregation (CA) using a first component carrier in a first band and a second component carrier in a second band different from the first band, a prescribed value of the Max TRP corresponding to the Power Class is determined independently for the first band and the second band, The control unit applies a Max TRP for the first band and a Max TRP for the second band corresponding to the Power Class to execute the Inter-band CA. Communication methods.

Images