JP2019097042A - User equipment and base station device - Google Patents

Abstract

To cause user equipment adaptable to transmission using beamforming to appropriately perform transmission power control in a direction of a beam.SOLUTION: User equipment communicates with a base station device by using beam forming and comprises: a reception part for receiving from the base station device information in which allowable maximum total radiation power is associated with equivalent isotropic radiation power in a direction where the user equipment obtains a maximum antenna gain; and a transmission power control part for setting maximum transmission power due to the information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a user apparatus and a base station apparatus in a wireless communication system.

  In 3GPP (3rd Generation Partnership Project), 5G or NR (New Radio) is required to realize further increase in system capacity, further increase in data transmission speed, and further reduction in delay in a wireless section. Investigation of a called wireless communication system (hereinafter, the wireless communication system is referred to as "5G" or "NR") is in progress. In 5G, in order to meet the requirement of reducing the delay of the wireless section to 1 ms or less while achieving a throughput of 10 Gbps or more, various wireless technologies are being studied.

  In 5G, wireless communication using millimeter waves is under consideration, and it is assumed to use a wide range of frequencies up to higher frequency bands than LTE (Long Term Evolution). In particular, since the propagation loss increases in the high frequency band, application of beamforming with a narrow beam width has been studied in order to compensate for the propagation loss (for example, Non-Patent Document 1).

3GPP TS 36.211 V14.4.0 (2017-09)

  On the other hand, in the examination of the current 5G system, the specification on the maximum transmission power when the user apparatus performs transmission using beamforming has not been clarified. Therefore, when the user apparatus performs transmission using beamforming, the antenna gain largely changes depending on the direction of the beam, so it is difficult to appropriately control the peak transmission power particularly in the direction of the beam by the conventional transmission power control. Met.

  The present invention has been made in view of the above, and it is an object of a user apparatus corresponding to transmission by beamforming to appropriately perform transmission power control in the direction of a beam.

  According to the disclosed technology, the user equipment communicates with the base station apparatus using beamforming, and the equivalent isotropic radiation in the direction in which the user equipment can obtain the maximum antenna gain and the maximum total radiation power that is allowed A user apparatus is provided which includes a receiving unit that receives information associated with power from the base station apparatus, and a transmission power control unit that sets a maximum transmission power based on the information.

  According to the disclosed technique, a user apparatus corresponding to transmission by beamforming can appropriately perform transmission power control in the direction of a beam.

It is a figure which shows the structural example of the radio | wireless communications system in embodiment of this invention. It is a figure which shows the structural example of the circuit which performs digital beam forming. It is a figure which shows the structural example of the circuit which performs analog beam forming. It is a figure which shows the structural example of the circuit which performs hybrid beam forming. It is a figure for demonstrating peak EIRP of the transmission power in embodiment of this invention. It is a figure which shows the example of the sequence of the power control in embodiment of this invention. It is a figure which shows the example of the largest TRP and EIRP power class in embodiment of this invention. It is a figure which shows the example (1) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows the example (2) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows the example (3) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows the example (4) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows the example (5) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows the example (6) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows the example (7) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows the example (8) of the message which concerns on the power control using EIRP in embodiment of this invention. It is a figure for demonstrating the example (1) of cell selection which concerns on the power control using EIRP in embodiment of this invention. It is a figure for demonstrating the example (2) of cell selection which concerns on the power control using EIRP in embodiment of this invention. It is a figure which shows an example of a function structure of the base station apparatus 100 in embodiment of this invention. It is a figure which shows an example of a function structure of the user apparatus 200 in embodiment of this invention. It is a figure which shows an example of the hardware constitutions of the base station apparatus 100 or the user apparatus 200 in embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

  When the wireless communication system of the present embodiment operates, the existing technology can be used as appropriate. However, the existing technology is, for example, the existing LTE, but is not limited to the existing LTE. Also, “LTE” used herein has a broad meaning including LTE-Advanced and LTE-Advanced or later (for example, 5G or NR) unless otherwise specified.

  Also, in the embodiments described below, using terms such as Synchronization Signal (SS), Primary SS (PSS), Secondary SS (SSS), and Physical broadcast channel (PBCH), which are used in existing LTE, are used. However, this is for convenience of description, and similar signals, functions, etc. may be referred to by other names. Moreover, the above-mentioned term in NR is described with NR-SS, NR-PSS, NR-SSS, NR-PBCH etc.

  FIG. 1 is a diagram showing an example of a configuration of a wireless communication system according to an embodiment of the present invention. The wireless communication system in the embodiment of the present invention includes base station apparatus 100 and user apparatus 200 as shown in FIG. Although one base station apparatus 100 and one user apparatus 200 are shown in FIG. 1, this is an example, and may be plural.

  The base station apparatus 100 is a communication apparatus that provides one or more cells and performs wireless communication with the user apparatus 200. As shown in FIG. 1, the base station apparatus 100 transmits, for example, information on transmission power control to the user apparatus 200. The information on transmission power control is, for example, a TPC command transmitted by DCI (Downlink Control Information). The TPC command notifies the user apparatus 200 of the absolute value or the accumulated value of the transmission power of PUSCH (Physical Uplink Shared Channel).

  As shown in FIG. 1, the user apparatus 200 performs uplink transmission to the base station apparatus 100. Also, as shown in FIG. 1, the user apparatus 200 transmits an uplink transmission signal by beamforming to the base station apparatus 100.

  In the present embodiment, the duplex system may be a TDD (time division duplex) system or an FDD (frequency division duplex) system. Also, in the following description, transmitting a signal using a transmit beam may be synonymous with transmitting a signal that has been multiplied by a precoding vector (precoded with a precoding vector). Similarly, receiving a signal using a receive beam may be synonymous with multiplying the received signal by a predetermined weight vector. Also, transmitting a signal using a transmit beam may be referred to as transmitting a signal at a particular antenna port. Similarly, receiving a signal using a receive beam may be referred to as receiving a signal at a particular antenna port. The antenna port refers to a logical antenna port defined in the 3GPP standard. The method of forming the transmit beam and the receive beam is not limited to the method described above. For example, in base station apparatus 100 having a plurality of antennas and user apparatus 200, a method of changing the angle of each antenna may be used, or a method combining the method of using precoding vector and the method of changing the antenna angle Alternatively, other methods may be used. Also, for example, in the high frequency band, a plurality of different transmit beams may be used. The use of multiple transmission beams is called multi-beam operation, and the use of one transmission beam is called single-beam operation.

<Example of beam forming>
FIG. 2 is a diagram showing an example of the configuration of a circuit that performs digital beam forming. As a method of realizing beam forming, as shown in FIG. 2, while having DACs (Digital Analog Converters) equal in number to the number of transmission antenna elements, baseband signal processing for performing precoding is performed as many as the number of transmission antenna elements Digital beamforming is being considered.

  FIG. 3 is a diagram showing a configuration example of a circuit that performs analog beam forming. As a method of realizing analog beamforming, as shown in FIG. 3, beamforming is performed using a variable phase shifter in an RF (Radio Frequency) circuit at a subsequent stage where a transmission signal is converted to an analog signal through a DAC. Analog beamforming to realize

  FIG. 4 is a diagram showing an example of the configuration of a circuit that performs hybrid beam forming. As shown in FIG. 4, by combining digital beamforming and analog beamforming, beamforming processing is performed using both precoding baseband signal processing and variable phase shifters in an RF (Radio Frequency) circuit. Hybrid beamforming to be realized is being studied.

Example 1
Example 1 will be described below.

  FIG. 5 is a diagram for explaining peak EIRP of transmission power in the embodiment of the present invention. In the upper view of FIG. 5, the antenna characteristic of the user apparatus 200 in a horizontal plane is schematically shown.

  As shown in FIG. 5, the maximum radiation of the main lobe of the antenna of the user apparatus 200 corresponds to the peak EIRP (Equivalent Isotropic Radiated Power). That is, peak EIRP can be achieved in the direction in which the antenna of the user apparatus 200 can obtain the maximum antenna gain. At this time, the dotted line indicated by the isotropic antenna gain 0 dBi to the dotted line indicating the peak EIRP correspond to the antenna gain. For example, when the transmission power is 20 dBm at the antenna connector end and the peak EIRP is 30 dBm, the antenna gain is 10 dB when the peak EIRP is achieved. When the user apparatus 200 does not achieve the peak EIRP, that is, when the user apparatus 200 is not transmitting toward the boresight of the antenna, the antenna gain is reduced to, for example, 7 dB.

  Also, in the lower part of FIG. 5, the antenna characteristics of the user apparatus 200 in the vertical plane are schematically shown. The maximum radiation of the main lobe of the antenna of the user device 200 corresponds to the peak EIRP. Therefore, peak EIRP can be achieved in the direction in which the antenna of the user apparatus 200 can obtain the maximum antenna gain. At this time, the dotted line indicated by the isotropic antenna gain 0 dBi to the dotted line indicating the peak EIRP correspond to the antenna gain. Hereinafter, “EIRP” refers to peak EIRP which is the maximum radiation of the main lobe of the antenna.

  Here, the maximum transmission power of the user apparatus 200 is defined using two indices of EIRP and TRP (Total Radiated Power). EIRP is an index indicating the power radiated from the antenna, and TRP is the sum (integrated value) of power in all 360 degrees. By defining the maximum transmit power using EIRP and TRP, it is possible to transmit a signal from the antenna in the direction of the beam with the maximum transmit power defined by EIRP exceeding the maximum transmit power defined by TRP .

  In LTE, a parameter P-Max that suppresses the maximum transmission power on a cell basis may also be defined based on TRP or EIRP.

  In addition, it is assumed that when the maximum transmission power defined by TRP is reduced, the maximum transmission power defined by EIRP is also reduced accordingly. On the other hand, depending on the antenna implementation, even if the maximum transmission power defined by TRP is reduced, the maximum transmission power defined by EIRP can be maintained without reduction. For example, even if the maximum transmission power specified by TRP is lowered from 23 dBm to 20 dBm, the maximum transmission power specified by EIRP is maintained at 30 dBm as in the antenna element of user apparatus 200. Implementation is also possible.

  However, if the combination of TRP and EIRP is uniformly defined for each terminal as in the conventional Power Class, the implementation flexibility as described above can not be permitted.

  For example, it is assumed that the regulation of the maximum transmission power defined by TRP in one country is 23 dBm and the regulation of the maximum transmission power defined by TRP in another country is 20 dBm more strictly than the country. When the same antenna element is used, the maximum transmission power defined by EIRP is raised, for example, by 3 dBm in a certain country. However, when the maximum transmission power defined by EIRP is uniformly defined, the maximum transmission power defined by EIRP can not be increased because the maximum transmission power defined by TRP is increased by 3 dBm.

  Also, in the idle state, cell selection in consideration of the maximum transmission power defined by TRP of the user apparatus 200 or the maximum transmission power defined by EIRP has not been performed.

  Therefore, in the present embodiment, for example, the base station apparatus 100 notifies the user apparatus 200 of the maximum transmission power defined by TRP and the power class defined by EIR for each country, and the power class and cells in the conventional user apparatus 200. P-Max, which suppresses transmission power in units, is defined in TRP or EIRP.

  FIG. 6 is a diagram showing an example of a power control sequence according to the embodiment of the present invention.

  In step S1, the base station device 100 transmits, to the user device 200, an RRC message "SIB1" or an RRC message "RRC Reconfiguration" including an information element "CountrySpecificMax-TRP-EIRP" of an RRC message. The user apparatus 200 will apply the said parameter to transmission setting, when "NS-PmaxList", "additionalSpectrumEmission", and "p-Max" are contained, if "SIB1" or "RRCReconfiguration" is received. Details of the RRC message will be described later. Also, when “CountrySpecificMax-TRP-EIRP” is included in “SIB1” or “RRC Reconfiguration”, user apparatus 200 performs transmission power control based on the maximum transmission power defined by TRP and the power class defined by EIRP. (S2).

  FIG. 7 is a diagram showing an example of maximum TRP and EIRP power class in the embodiment of the present invention. In FIG. 7, the maximum transmission power defined by TRP, which defines the transmission power control in step S2 shown in FIG. 6, and the power class defined by EIRP will be described.

  As shown in FIG. 7, one or more “Integer values” are associated with each NR band “Applicable NR bands”, and each “Integer value” is the maximum transmission power “Maximum specified by TRP. A power class "EIRP Power Class" defined by TRP and EIRP is associated.

  For example, “01” of the NR band “n 257” indicates that “Maximum TRP” is “23” dBm and “EIRP Power Class” is “30” dBm. That is, although user equipment 200 to which “01” of “Interger vlaue” is applied is 23 dBm in the maximum transmission power specified by TRP in band “n 257” of NR, the maximum transmission power specified by EIRP is 30 dBm It is possible to output up to.

  Also, “02” of the NR band “n 257” indicates that “Maximum TRP” is “19” dBm and “EIRP Power Class” is “30” dBm. That is, the user equipment 200 to which “02” of “Interger vlaue” is applied is 30 dBm of the maximum transmission power defined by EIRP although the maximum transmission power defined by TRP is 19 dBm in the band “n 258” of NR. It is possible to output up to.

  Therefore, the same "EIRP Power Class" can be applied even when "Maximum TRP" is different in the NR band "n 257" shown in FIG.

  Similarly, “01” of the NR band “n258” indicates that “Maximum TRP” is “23” dBm and “EIRP Power Class” is “30” dBm. That is, the user apparatus 200 to which “01” of “Interger vlaue” is applied is 30 dBm of the maximum transmission power defined by EIRP, although the maximum transmission power defined by TRP is 23 dBm in the band “n 258” of NR. It is possible to output up to.

  Also, “02” of the NR band “n258” indicates that “Maximum TRP” is “19” dBm and “EIRP Power Class” is “26” dBm. That is, the user apparatus 200 to which “02” of “Interger vlaue” is applied is the maximum transmission power of 26 dBm specified by EIRP although the maximum transmission power specified by TRP is 23 dBm in the band “n 258” of NR. It is possible to output up to.

  Therefore, in the NR band “n258” shown in FIG. 7, when “Maximum TRP” is increased by 4 dBm, a setting in which “EIRP Power Class” is also increased by 4 dBm can be applied.

The power class P _{EIRP_PowerClass} defined by EIRP as described above defines the upper limit and lower limit of the maximum transmission power P _{EIRP_CMAX, c} defined by EIRP as follows. Hereinafter, the parameter to which "c" is given indicates that it is for serving cell c.
P _{EIRP_CMAX_L, c} ≦ P _{EIRP_CMAX, c} ≦ P _{EIRP_CMAX_H, c} with
P _{EIRP_CMAX_L, c} = MIN {P _{EIRP_EMAX, c} , P _{EIRP_PowerClass} -MAX (MPR _c + A-MPR _c , P-MPR _c )}
P _{EIRP_CMAX_H, c} = MIN {P _{EIRP_EMAX, c} , P _{EIRP_PowerClass} -ΔP _PowerClass }

P _{EIRP_EMAX, c} is an information element “maxEIRP” included in p-Max, and limits the maximum transmission power defined by EIRP. Also, MPR _c , A-MPR _c , or P-MPR _c (Max Power Reduction) is defined based on, for example, channel bandwidth, transmission bandwidth, CA (Carrier Aggregation) status, etc. Is a parameter that limits ΔP _PowerClass is a correction value such as tolerance.

In addition, P _{CS —} TRP — _{MAX, c,} which is the “Maximum TRP” described above, defines the upper limit and the lower limit of the maximum transmission power P TRP — _{MAX, c} defined by TRP as follows.
P _{TRP_MAX, c} P P _{TRP_MAX_H, c} with
P _{TRP_MAX_H, c} = MIN { _{PE_TRP_MAX, c} , P _{CS_TRP_MAX, c} }
_{PE_TRP_MAX, c} is an information element included in p-Max and limits the maximum transmission power defined by TRP.

  FIG. 8 is a diagram showing an example (1) of a message related to power control using EIRP in the embodiment of the present invention. The RRC message "SIB1" will be described with reference to FIG. “SIB1” is system information, and includes whether or not to access the cell, scheduling of other system information, setting of radio resources common to user apparatuses, and the like. Note that "SIB1" may be "SystemInformationBlockType1".

  As shown in FIG. 8, the RRC message "SIB1" includes an information element "frequencyInfoUL". The information element "frequencyInfoUL" includes "CountrySpecificMax-TRP-EIRP".

  When the user apparatus 200 receives “SIB 1”, when “NS-PmaxList”, “additionalSpectrumEmission”, and “p-Max” are included, the user apparatus 200 applies the parameters to the transmission setting.

  Next, when “CountrySpecificMax-TRP-EIRP” is included in “SIB1”, the user apparatus 200 performs transmission power control based on the maximum transmission power defined by TRP and the power class defined by EIRP.

  FIG. 9 is a diagram showing an example (2) of a message related to power control using EIRP in the embodiment of the present invention. As shown in FIG. 9, the information element "frequencyInfoUL" includes "ns-PmaxList" and "CountrySpecificMax-TRP-EIRP".

  FIG. 10 is a diagram showing an example (3) of a message related to power control using EIRP in the embodiment of the present invention. As shown in FIG. 10, the information element "ns-PmaxList" includes "p-Max" and "additionalSpectrumEmission".

  The information element "additionalSpectrumEmission" indicates acceptable spectrum emissions. When the user equipment 200 receives the "additionalSpectrumEmission", it sets spectrum emission to the notified required range.

  FIG. 11 is a diagram showing an example (4) of a message related to power control using EIRP in the embodiment of the present invention. As shown in FIG. 11, the information element "p-Max" includes "maxEIRP" and "maxTRP". In addition, "p-Max" is a parameter which suppresses transmission power per cell.

The information element “maxEIRP” is P _{EIRP_EMAX, c} described in FIG. 7, and limits the maximum transmission power defined by EIRP. In the information element "maxTRP", _{PE_TRP_MAX, c} described in Fig. 7 limits the maximum transmission power defined by TRP.

FIG. 12 is a diagram showing an example (5) of a message related to power control using EIRP in the embodiment of the present invention. Figure information elements shown in 12 "CountrySpecificMax-TRP-EIRP" is "Maximum TRP" _{P CS_TRP_MAX, c} described in FIG. 7, the prescribed maximum transmit power _{P TRP_MAX} defined by _TRP, the upper and lower limits of _c Parameters that The power class defined by EIRP described in FIG. 7 is defined by the information element "CountrySpecificMax-TRP-EIRP".

  FIG. 13 is a diagram showing an example (6) of a message related to power control using EIRP in the embodiment of the present invention. The RRC message "RRC Reconfiguration" will be described with reference to FIG. “RRC Reconfiguration” is a command to change RRC connection, and includes mobility control, radio resource configuration, and related non-access stratum (NAS) information and security configuration. Note that “RRCReconfiguration” may be “RRCConnectionReconfiguration”.

  The RRC message “RRCReconfiguration” includes an information element “CellGroupConfig” in “masterCellGroupConfig” and “secondaryCellGroupToAddModList”.

  FIG. 14 is a diagram showing an example (7) of a message related to power control using EIRP in the embodiment of the present invention. The information element "CellGroupConfig" shown in FIG. 14 includes "PCellConfig" or "SCellConfig". "PCellConfig" or "SCellConfig" includes "ServingCellConfigCommon".

  FIG. 15 is a diagram showing an example (8) of a message related to power control using EIRP in the embodiment of the present invention. The information element "ServingCellConfigCommon" shown in FIG. 15 includes "frequencyInfoUL". As described in FIGS. 9 to 12, the information element “frequencyInfoUL” includes “CountrySpecificMax-TRP-EIRP”. The power class defined by EIRP described in FIG. 7 is defined by the information element "CountrySpecificMax-TRP-EIRP".

  According to the above-described first embodiment, the base station apparatus 100 can notify or notify the user apparatus 200 of information indicating the maximum TRP or EIRP power class for each country. The user apparatus 200 can set the maximum transmission power defined by EIRP based on the information. Also, by applying EIRP to the power class related to the maximum transmission power and the parameter p-Max for limiting the transmission power, the user apparatus 200 performs maximum transmission power control in consideration of the power radiated from the antenna by the beam. Can.

  That is, the user apparatus corresponding to the transmission by beamforming can perform transmission power control in the direction of a beam appropriately.

Example 2
Example 2 will be described below. In the second embodiment, differences from the first embodiment will be described. Therefore, points that are not particularly mentioned may be the same as in the first embodiment.

  For example, when there is a plurality of legal regulations relating to transmission power in a certain country, or when regulations relating to transmission power are changed, it has been necessary to change the transmission power limitation of the user apparatus. Therefore, in the present embodiment, the base station apparatus 100 can notify or notify the user apparatus 200 of the definition of the combination of a plurality of maximum TRPs and EIRP power classes. Each combination of multiple maximum TRP and EIRP power classes is given priority. That is, the base station apparatus 100 may notify the user apparatus 200 of the priority explicitly or implicitly via system information or notification via an individual RRC message, for each combination of maximum TRP and EIRP power class. it can. The user apparatus 200 selects the maximum TRP and EIRP power class to apply based on the priority notified or notified from the base station apparatus 100.

  For example, in the NR band “n 257” described in FIG. 7, it is assumed that the user apparatus 200 receives information in which “Integer value” is assigned “01” priority 2 and “02” priority 1. A lower priority value is defined as a higher priority. A certain user apparatus 200 applies “02” with high priority to the setting of transmission power when the implementation related to the antenna etc. can satisfy “01” and “02”. Also, if the implementation related to the antenna or the like can satisfy “01” and can not satisfy “02”, a certain user apparatus 200 applies “01” to the setting of transmission power.

  According to the above-described second embodiment, the base station apparatus 100 can notify or notify the user apparatus 200 of information indicating a plurality of maximum TRPs or EIRP power classes to which priorities are given for each country. The priority may be explicitly indicated for each “Integer value” in the broadcast information or the message of RRCReconfiguration which is an individual RRC signal to the user apparatus 200. Alternatively, in order from the highest priority value to the lowest priority value or the lowest priority value of "Integer value" of "CountrySpecificMax-TRP-EIRP" included in the broadcast information or the individual RRC signal to the user apparatus 200 or the message of RRCReconfiguration. It may be implicitly indicated by being listed and sent in order of high value. The user apparatus 200 can select the maximum TRP or EIRP power class based on the priority, and can set the maximum transmission power defined by EIRP. Also, by applying EIRP to the power class related to the maximum transmission power and the parameter p-Max for limiting the transmission power, the user apparatus 200 performs maximum transmission power control in consideration of the power radiated from the antenna by the beam. Can.

Example 3
The third embodiment will be described below. In the third embodiment, points different from the first embodiment or the second embodiment will be described. Therefore, points that are not particularly mentioned may be the same as in Example 1 or Example 2.

  For example, the optimal beam width may differ depending on the frequency band used, which may affect cell selection. Therefore, in the present embodiment, parameters based on EIRP or TRP can be used at the time of cell selection according to the frequency band.

  FIG. 16 is a diagram for explaining an example (1) of cell selection related to power control using EIRP according to the embodiment of the present invention. In FIG. 16, conditions of cell selection based on parameters using the maximum transmission power defined by EIRP will be described. As shown in FIG. 16, when Srxlev> 0 and Squal> 0, the condition S of cell selection is satisfied. Srxlev is a threshold related to RSRP (Reference Signal Received Power), and Squal is a threshold related to RSRQ (Reference Signal Received Quality). “Pcompensation” shown in FIG. 16 is a parameter related to Srxlev.

If the carrier frequency exceeds 6 GHz, "Pcompensation" is defined by max (P _{EIRP_MAX_H} -P _{EIRP_PowerClass} , 0) using the parameter P _{EIRP_MAX_H} . The parameter P _{EIRP_MAX_H} is defined by min { _{PE_EIRP_MAX, c} , P _{EIRP_PowerClass, c} }. That is, “Pcompensation” is calculated using the maximum transmission power defined by EIRP. Note that _{PE_EIRP_MAX, c} is the information element “maxEIRP” included in “p-Max” described in FIG. 11, and P _{EIRP_PowerClass} is “EIRP Power Class” described in FIG.

  FIG. 17 is a diagram for describing an example (2) of cell selection related to power control using EIRP in the embodiment of the present invention. In FIG. 17, conditions for cell selection based on parameters using the maximum transmission power defined by EIRP will be described. As shown in FIG. 17, when Srxlev> 0 and Squal> 0, the condition S of cell selection is satisfied. Similarly to FIG. 16, Srxlev is a threshold for RSRP, and Squal is a threshold for RSRQ. “Pcompensation” shown in FIG. 17 is a parameter related to Srxlev.

If the carrier frequency is less than 6 GHz, "Pcompensation" is defined by max ( _{PTRP_MAX_H} -P _{EIRP_PowerClass} , 0) using the parameter _{PTRP_MAX_H} . The parameter P _{TRP_MAX_H} is defined by min { _{PE_TRP_MAX, c} , _{PCS_TRP_MAX, c} }. That is, "Pcompensation" is calculated using the maximum transmission power defined by TRP. Note that _{PE_TRP_MAX, c} is the information element “maxTRP” included in “p-Max” described in FIG. 11, _{PCS_TRP_MAX} is the “Maximum TRP” described in FIG. 7, and P _{EIRP_PowerClass} is a diagram It is "EIRP Power Class" explained in 7.

  According to the above-described third embodiment, the user apparatus 200 can calculate Pcompensation, which is a parameter for correcting the maximum transmission power, according to the frequency band. For example, if the frequency band is 6 GHz or more, Pcompensation can be calculated using EIRP, and if the frequency band is less than 6 GHz, Pcompensation can be calculated using TRP.

(Device configuration)
Next, an example of functional configuration of the base station apparatus 100 and the user apparatus 200 that execute the processes and operations described above will be described. The base station apparatus 100 and the user apparatus 200 include functions to implement the above-described embodiment. However, each of the base station apparatus 100 and the user apparatus 200 may have only some of the functions in the embodiments.

<Base station apparatus 100>
FIG. 18 is a diagram showing an example of a functional configuration of the base station apparatus 100. As shown in FIG. As illustrated in FIG. 18, the base station apparatus 100 includes a transmission unit 110, a reception unit 120, a setting information management unit 130, and a network control unit 140. The functional configuration shown in FIG. 18 is merely an example. As long as the operation according to the embodiment of the present invention can be performed, the names of the function divisions and the function parts may be arbitrary.

  The transmission unit 110 includes a function of generating a signal to be transmitted to the user apparatus 200 and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the user apparatus 200 and acquiring, for example, higher layer information from the received signals. The transmission unit 110 also has a function of transmitting, to the user apparatus 200, NR-PSS, NR-SSS, NR-PBCH, a DL / UL control signal, and the like. Also, the transmitting unit 110 transmits information on transmission power control to the user apparatus 200, and the receiving unit 120 receives the information transmitted from the user apparatus 200 in uplink.

  The setting information management unit 130 stores setting information set in advance and various setting information to be transmitted to the user device 200. The content of the setting information is, for example, information on transmission power control.

  The network control unit 140 performs control related to transmission power control to the user apparatus 200 in the base station apparatus 100 described in the embodiment.

<User device 200>
FIG. 19 is a diagram showing an example of a functional configuration of the user apparatus 200. As shown in FIG. As illustrated in FIG. 19, the user apparatus 200 includes a transmission unit 210, a reception unit 220, a setting information management unit 230, and a transmission power control unit 240. The functional configuration shown in FIG. 19 is merely an example. As long as the operation according to the embodiment of the present invention can be performed, the names of the function divisions and the function parts may be arbitrary.

  The transmission unit 210 creates a transmission signal from transmission data, and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals, and acquires higher layer signals from the received physical layer signals. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal and the like transmitted from the base station apparatus 100. Also, the transmitting unit 210 transmits information on transmission power setting and information indicating antenna gain to the base station apparatus 100, and the receiving unit 120 receives information on transmission power control from the base station apparatus 100.

  The setting information management unit 230 stores various setting information received from the base station apparatus 100 by the receiving unit 220. The setting information management unit 230 also stores setting information set in advance. The content of the setting information is, for example, information on transmission power setting.

  The transmission power control unit 240 performs control related to transmission power setting in the user apparatus 200 described in the embodiment. A functional unit related to signal transmission in the transmission power control unit 240 may be included in the transmission unit 210, and a functional unit related to signal reception in the transmission power control unit 240 may be included in the reception unit 220.

(Hardware configuration)
Functional configuration diagrams (FIGS. 18 and 19) used in the description of the embodiment of the present invention described above show blocks of functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation means of each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically connected to a plurality of elements, or directly and two or more physically and / or logically separated devices. And / or indirectly (for example, wired and / or wirelessly) connected, and may be realized by the plurality of devices.

  Also, for example, both the base station apparatus 100 and the user apparatus 200 in the embodiment of the present invention may function as a computer that performs the process according to the embodiment of the present invention. FIG. 20 is a diagram showing an example of a hardware configuration of a wireless communication apparatus which is the base station apparatus 100 or the user apparatus 200 according to the embodiment of the present invention. The above-described base station apparatus 100 and user apparatus 200 physically are each a computer apparatus including a processor 1001, a storage apparatus 1002, an auxiliary storage apparatus 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007 and the like. It may be configured.

  In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the base station apparatus 100 and the user apparatus 200 may be configured to include one or more of the respective devices indicated by 1001 to 1006 shown in the figure, or may be configured without including some devices. It may be done.

  Each function in the base station apparatus 100 and the user apparatus 200 causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and causes communication and storage by the communication apparatus 1004. This is realized by controlling reading and / or writing of data in the device 1002 and the auxiliary storage device 1003.

  The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.

  Further, the processor 1001 reads a program (program code), a software module or data from the auxiliary storage device 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the transmission unit 110, the reception unit 120, the setting information management unit 130, and the network control unit 140 of the base station apparatus 100 shown in FIG. 18 are stored in the storage device 1002 and realized by a control program operated by the processor 1001. It is also good. In addition, for example, the control unit 210 stores the transmission unit 210, the reception unit 220, the setting information management unit 230, and the transmission power control unit 240 of the user apparatus 200 illustrated in FIG. It may be realized by The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

  The storage device 1002 is a computer readable recording medium, and is, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be configured. The storage device 1002 may be called a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, and the like that can be executed to perform the process according to an embodiment of the present invention.

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

  The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. For example, the transmission unit 110 and the reception unit 120 of the base station apparatus 100 may be realized by the communication apparatus 1004. Also, the transmission unit 210 and the reception unit 220 of the user apparatus 200 may be realized by the communication apparatus 1004.

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

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

  Further, the base station apparatus 100 and the user apparatus 200 respectively include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), and the like. Hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.

(Summary of the embodiment)
As described above, according to the embodiment of the present invention, it is a user apparatus that communicates with a base station apparatus using beamforming, and the maximum total radiation power allowed and the user apparatus being the largest. A reception unit for receiving information associated with equivalent isotropic radiation power in a direction in which antenna gain can be obtained from the base station apparatus, and a transmission power control unit for setting a maximum transmission power based on the information; A user device is provided.

  With the above configuration, the base station apparatus 100 can notify or notify the user apparatus 200 of information indicating the maximum TRP or EIRP power class for each country. The user apparatus 200 can set the maximum transmission power defined by EIRP based on the information. Also, by applying EIRP to the power class related to the maximum transmission power and the parameter p-Max for limiting the transmission power, the user apparatus 200 performs maximum transmission power control in consideration of the power radiated from the antenna by the beam. Can. That is, the user apparatus corresponding to the transmission by beamforming can perform transmission power control in the direction of a beam appropriately.

  The information may include at least one set of associated total radiation power and equivalent isotropic power for each band. With this configuration, the base station apparatus can set a plurality of sets of maximum TRP or EIRP power classes for a certain band.

  The maximum transmission power to be set is based on the value indicating the equivalent isotropic power included in the information, the upper limit value and the lower limit value of the equivalent isotropic radiation power in the direction in which the user apparatus can obtain the maximum antenna gain. It is prescribed. According to the configuration, the user apparatus can set the maximum transmission power according to EIRP.

  The upper limit value and the lower limit value of the total radiation power of the user apparatus may be defined based on the value indicating the total radiation power included in the information as the maximum transmission power to be set. According to the configuration, the user apparatus can set the maximum transmission power related to the TRP.

  The information includes a parameter that suppresses transmission power in units of cells, and the parameter is applied to equivalent isotropic radiation power in a direction in which the user apparatus can obtain the maximum antenna gain, and the information is uplink The information indicating the frequency and the information indicating the uplink frequency may be included in system information or information for setting a cell, and the information for setting the cell may be included in a radio resource reconfiguration message. With this configuration, the base station apparatus can perform the setting relating to EIRP in units of cells by the parameter p-Max.

  Further, according to the embodiment of the present invention, it is a base station apparatus that communicates with a user apparatus using beamforming, and can obtain the maximum allowable total radiation power and the maximum antenna gain of the user apparatus. Base station having transmitting unit for transmitting information associated with equivalent isotropic radiation power of direction to the user apparatus, and network control unit for setting maximum transmission power to the user apparatus based on the information An apparatus is provided.

  With the above configuration, the base station apparatus 100 can notify or notify the user apparatus 200 of information indicating the maximum TRP or EIRP power class for each country. The user apparatus 200 can set the maximum transmission power defined by EIRP based on the information. Also, by applying EIRP to the power class related to the maximum transmission power and the parameter p-Max for limiting the transmission power, the user apparatus 200 performs maximum transmission power control in consideration of the power radiated from the antenna by the beam. Can. That is, the user apparatus corresponding to the transmission by beamforming can perform transmission power control in the direction of a beam appropriately.

(Supplement 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 should understand various modifications, modifications, alternatives, replacements, and the like. I will. Although specific numerical examples are used to facilitate understanding of the invention, unless otherwise noted, those 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, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. It may be applied to the matters described in (unless contradictory). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operations of multiple functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by multiple components. With regard to the processing procedures described in the embodiment, the order of processing may be changed as long as no contradiction arises. Although the base station apparatus 100 and the user apparatus 200 are described using a functional block diagram for the convenience of the processing description, such an apparatus may be realized in hardware, software or a combination thereof. The software operated by the processor of the base station apparatus 100 according to the embodiment of the present invention and the software operated by the processor of the user apparatus 200 according to the embodiment of the present invention are random access memory (RAM), flash memory, read It may be stored in a dedicated memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

  In addition, notification of information is not limited to the aspect / embodiment described herein, and may be performed by other methods. For example, notification of information may be physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block), other signals, or a combination thereof. Also, RRC signaling may be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.

  Each aspect / embodiment described in the present specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band), The present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.

  As long as there is no contradiction, the processing procedure, sequence, flow chart, etc. of each aspect / embodiment described in this specification may be reversed. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.

  In some cases, the specific operation performed by the base station apparatus 100 in this specification may also be performed by its upper node. In a network consisting of one or more network nodes having a base station apparatus 100 apparatus, various operations performed for communication with the user apparatus 200 may be performed by the base station apparatus 100 and / or the base station apparatus 100. It will be appreciated that it may be performed by other network nodes other than (for example but not limited to MME or S-GW etc). Although the case where one other network node other than the base station apparatus 100 was illustrated above was illustrated, you may be a combination (for example, MME and S-GW) of several other network nodes.

  Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution.

  The user equipment 200 may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, by those skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.

  Base station apparatus 100 may also be referred to by those skilled in the art with NB (Node B), eNB (enhanced Node B), gNB, Base Station, or some other suitable term.

  The terms "determining", "determining" as used herein may encompass a wide variety of operations. "Judgment", "decision" are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision” and the like. Also, "determination" and "determination" are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (Accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”. Also, "judgement" and "decision" are to be considered as "judgement" and "decision" that they have resolved (resolving), selecting (selecting), choosing (choosing), establishing (establishing), etc. May be included. That is, "judgment" "decision" may include considering that some action is "judged" "decision".

  As used herein, 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 long as “include”, “including”, and variations thereof are used in the present specification or claims, these terms are as used in the term “comprising”. Is intended to be comprehensive. Further, it is intended that the term "or" as used in the present specification or in the claims is not an exclusive OR.

  Throughout the present disclosure, when articles are added by translation, such as a, an and the in English, for example, these articles are plural unless the context clearly indicates otherwise. May include.

  In the embodiment of the present invention, RRCReconfiguration is an example of a radio resource reconfiguration message. FrequencyInfoUL is an example of information indicating an uplink frequency. ServingCellConfigCommon is an example of information for configuring a cell. p-Max is an example of the parameter which suppresses transmission power in a cell unit.

  Although the present invention has been described above in detail, it is apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and alterations without departing from the spirit and scope of the present invention defined by the description of the claims. Accordingly, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.

100 base station apparatus 200 user apparatus 110 transmission section 120 reception section 130 setting information management section 140 network control section 200 transmission section 220 reception section 230 setting information management section 240 transmission power control section 1001 processor 1002 storage device 1003 auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims (6)

A user apparatus that communicates with a base station apparatus using beamforming,
A receiving unit that receives, from the base station apparatus, information associated with the maximum total radiation power that is permitted and the equivalent isotropic radiation power in the direction in which the user apparatus can obtain the maximum antenna gain;
And a transmission power control unit configured to set a maximum transmission power based on the information.   The user apparatus according to claim 1, wherein the information includes at least one set of associated total radiation power and equivalent isotropic power for each band.   The maximum transmission power to be set is based on the value indicating the equivalent isotropic power included in the information, the upper limit value and the lower limit value of the equivalent isotropic radiation power in the direction in which the user apparatus can obtain the maximum antenna gain. The user equipment according to claim 2, defined.   The user apparatus according to claim 2, wherein the maximum transmission power to be set is defined by an upper limit value and a lower limit value of the total radiation power of the user apparatus based on a value indicating the total radiation power included in the information.   The information includes a parameter that suppresses transmission power in units of cells, and the parameter is applied to equivalent isotropic radiation power in a direction in which the user apparatus can obtain the maximum antenna gain, and the information is uplink The information according to claim 1, wherein the information indicative of a frequency and the information indicative of the uplink frequency is included in system information or information for setting a cell, and the information for setting the cell is included in a radio resource reconfiguration message. User equipment. A base station apparatus that communicates with a user apparatus using beamforming,
A transmitting unit for transmitting information associated with the maximum total radiation power permitted and the equivalent isotropic radiation power in the direction in which the user apparatus can obtain the maximum antenna gain, to the user apparatus;
And a network control unit configured to set a maximum transmission power in the user apparatus based on the information.

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