WO2020170452A1 - 端末及び無線通信方法 - Google Patents
端末及び無線通信方法 Download PDFInfo
- Publication number
- WO2020170452A1 WO2020170452A1 PCT/JP2019/006908 JP2019006908W WO2020170452A1 WO 2020170452 A1 WO2020170452 A1 WO 2020170452A1 JP 2019006908 W JP2019006908 W JP 2019006908W WO 2020170452 A1 WO2020170452 A1 WO 2020170452A1
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- WIPO (PCT)
- Prior art keywords
- base station
- terminal
- transmission power
- power
- duty cycle
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
Definitions
- the present disclosure relates to a terminal and a wireless communication method.
- LTE Long Term Evolution
- UMTS Universal Mobile Telecommunication System
- a successor system to LTE is also under study for the purpose of further widening the bandwidth and speeding up from LTE.
- LTE successor systems include, for example, LTE-Advanced (LTE-A), Future Radio Access (FRA), 5th generation mobile communication system (5G), 5Gplus (5G+), Radio Access Technology (New-RAT), New.
- LTE-A LTE-Advanced
- FAA Future Radio Access
- 5G 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- New-RAT Radio Access Technology
- NR Radio
- a wireless communication device eg, terminal
- controls transmission power e.g., transmission power.
- the setting of the transmission power for the wireless communication device in the specific frequency band there is room for further study on the setting of the transmission power for the wireless communication device in the specific frequency band.
- One of the purposes of the present disclosure is to enable setting of appropriate transmission power for a wireless communication device in a specific frequency band.
- a terminal includes a control unit that determines the transmission power of an uplink signal based on an association between a first parameter indicating a transmission ratio of an uplink signal in a predetermined period and a second parameter relating to the transmission power of the uplink. And a transmission unit that transmits the uplink signal using the transmission power.
- FIG. 6 is a diagram showing an example of a scheduling process of a terminal according to control method 1.
- FIG. 6 is a diagram showing an example of information used for scheduling processing of a terminal according to control method 1.
- 7 is a sequence diagram showing an operation example based on control method 2.
- FIG. It is a figure which shows an example of the correlation of Pmax and UL duty cycle which concerns on the control method 2.
- It is a figure which shows an example of the hardware constitutions of a base station and a terminal.
- NR uses a wider range of frequencies than the LTE frequency band (for example, the LTE band), including the existing LTE frequency band.
- frequency bands are classified into two frequency bands called Frequency Range 1 (FR1) and Frequency Range 2 (FR2).
- FR1 indicates a frequency band of 6 GHz or less.
- FR1 is also referred to as Sub6.
- FR2 indicates a frequency band higher than FR1 and includes, for example, a millimeter wave band.
- -Transmission power control is specified for wireless communication using FR1 and FR2.
- the signal of the uplink (UL) Control for reducing the transmission power (hereinafter, referred to as “UL transmission power”) is included.
- the information regarding the transmission power set in the terminal includes, for example, an example of a backoff value for the maximum transmission power of the terminal.
- a P-MPR control to reduce UL transmission power using P-MPR is control to reduce the total radiated power (TRP) or equivalent isotropic radiated power (EIRP) of the terminal.
- the upper limit of P-MPR is not specified, and the terminal can set P-MPR to any value.
- the setting of P-MPR enables UL transmission that satisfies the radio wave protection guidelines.
- the transmission power information set in the terminal includes, for example, the transmission rate of the UL signal in a predetermined period (for example, 10 ms) (for example, downlink (downlink)).
- the terminal or the base station may determine the transmission rate of the UL signal within the range equal to or less than the value shown in the UL duty cycle.
- a method in which a terminal adopting the Time Division Duplex (TDD) method controls the transmission power using the UL duty cycle will be described.
- the radio wave protection guidelines can be satisfied by the standard transmission power (for example, Power Class 3 (PC3): 23 dBm).
- the terminal when a terminal transmits a UL signal using a transmission power higher than the reference transmission power (for example, Power Class 2 (PC2): 26 dBm), the UL duty cycle that can satisfy the radio wave protection guidelines using the transmission power.
- the base station In other words, the network side.
- the terminal is notified of the UL transmission allocation (for example, UL grant) by the base station, for example.
- the base station sets (for example, configure) the transmission ratio of UL signals (for example, the ratio of UL and DL) to the terminal.
- the terminal changes from PC2 to PC3 (in other words, fallback) to reduce the UL transmission power.
- FR2 In FR2 as well, it is possible that the terminal controls the transmission power in the same way as FR1. However, there is room for study on a method of controlling transmission power by using UL duty cycle in wireless communication (for example, millimeter wave communication) using FR2.
- FIG. 1 shows a Power Class (for example, one of PC1, PC2, PC3, and PC4) used in wireless communication using FR2, and transmission power (for example, TRP and EIRP) is shown below.
- Power Class for example, one of PC1, PC2, PC3, and PC4
- transmission power for example, TRP and EIRP
- each Power Class of FR2 is not a fallback target like PC2 (for example, 26 dBm) and PC3 (for example, 23 dBm) of FR1.
- a higher power backoff value (for example, P-MPR) may be set for a terminal to which a higher UL transmission power is set.
- the difference between the lower limit value and the upper limit value of the transmission power (for example, EIRP) of each Power Class is larger than that in FR1.
- EIRP transmission power
- the lower limit value (Min peak) of EIRP is set to 22.4 dBm
- the upper limit value (Max peak) of EIRP is set to 43 dBm.
- the terminal to which PC3 is set determines UL transmission power in the range of EIRP from 22.4 dBm to 43 dBm.
- the appropriate P-MPR value may differ depending on the transmission power within the range specified in the Power Class. Therefore, for example, when P-MPR is specified based on Power Class, P-MPR is not appropriate depending on the UL transmission power set for each terminal even if the same Power Class is set. Sometimes there is not.
- the appropriate P-MPR value for the upper limit value of the transmission power of 43 dBm specified for PC3 shown in FIG. 1 is 22.4 dBm for the lower limit value of the transmission power specified for the same PC3. It can be an excessive backoff value.
- the appropriate P-MPR value for the lower limit value of the transmission power of 22.4 dBm specified for PC3 shown in Fig. 1 is 43 dBm for the upper limit value of the transmission power specified for the same PC3. May be a backoff value that is not sufficient.
- the upper limit of P-MPR set in the terminal is not specified.
- the setting range of the transmission power specified in each Power Class of FR2 is larger than that of FR1. Therefore, in wireless communication using FR2, a rapid power reduction may occur instantaneously depending on the setting of P-MPR.
- the P-MPR can be arbitrarily set by the terminal, so the base station cannot grasp the P-MPR set by the terminal. Therefore, the base station cannot determine whether the sharp decrease in the received power of the signal transmitted from the terminal is due to the setting of P-MPR or due to other factors (eg, shielding by the human body). .. Therefore, when the terminal controls the UL transmission power using P-MPR, the base station may not be able to normally control the process related to UL communication (for example, scheduling).
- a wireless communication device for example, a terminal
- a wireless communication device performs appropriate UL transmission power control in FR2
- FIG. 2 is a block diagram showing an example of the configuration of base station 10 according to the present embodiment.
- the base station 10 includes, for example, a transmission unit 101, a reception unit 102, and a control unit 103.
- the transmitter 101 transmits a DL signal for the terminal 20 to the terminal 20.
- the transmission unit 101 transmits the DL signal under the control of the control unit 103.
- the DL signal transmitted by the base station 10 may include, for example, information on UL transmission power (for example, a parameter on UL transmission power). Further, the DL signal transmitted by the base station 10 may include, for example, information (for example, UL grant) instructing allocation of the UL signal.
- the receiving unit 102 receives the UL signal transmitted from the terminal 20.
- the receiving unit 102 receives the UL signal under the control of the control unit 103.
- the UL signal transmitted by the terminal 20 may include, for example, information regarding the UL transmission power (for example, transmission power parameter).
- the information on the transmission power of UL may include, for example, information indicating the transmission rate of UL signals in a predetermined period (for example, UL duty cycle).
- the UL signal transmitted by the terminal 20 may include UL data (for example, a Physical Uplink Shared Channel (PDSCH) signal).
- PDSCH Physical Uplink Shared Channel
- the control unit 103 controls the transmission process of the transmission unit 101 and the reception process of the reception unit 102.
- the control unit 103 receives control information and the like from an upper layer (not shown) and outputs it to the transmission unit 101.
- the control unit 103 also outputs the data, control information, and the like received from the receiving unit 102 to the upper layer.
- control unit 103 may determine the UL signal allocation to the terminal 20, and output information (for example, UL grant) indicating the determined allocation to the transmission unit 101.
- information for example, UL grant
- FIG. 3 is a block diagram showing an example of the configuration of the terminal 20 according to the present embodiment.
- the terminal 20 includes, for example, a reception unit 201, a transmission unit 202, and a control unit 203.
- the receiving unit 201 receives the DL signal transmitted from the base station 10. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.
- the transmitting unit 202 transmits the UL signal to the base station 10.
- the transmission unit 202 transmits the UL signal under the control of the control unit 203.
- the control unit 203 controls a communication operation including a reception process in the reception unit 201 and a transmission process in the transmission unit 202.
- control unit 203 determines the transmission power of the UL signal. For example, the control unit 203 determines information on the transmission power of the UL signal (for example, UL duty cycle, or power backoff value (for example, P-MPR)). The control unit 203 determines the transmission power of the UL signal based on the determined information.
- information on the transmission power of the UL signal for example, UL duty cycle, or power backoff value (for example, P-MPR)
- P-MPR power backoff value
- control method in the present disclosure is not limited to these three methods.
- Control method 1 In the control method 1, the terminal 20 is based on the association between the UL signal transmission rate (for example, UL duty cycle) and the power backoff value (for example, P-MPR) with respect to the UL transmission power (for example, maximum transmission power). And determines UL transmission power.
- the UL signal transmission rate for example, UL duty cycle
- P-MPR power backoff value
- FIG. 4 is a sequence diagram showing an example of operations of base station 10 and terminal 20 based on control method 1 according to the present embodiment.
- the terminal 20 determines the UL duty cycle (S101). For example, the terminal 20 may determine the UL duty cycle corresponding to the transmission power specified in the set Power Class. For example, the terminal 20 can satisfy the radio wave protection guideline by the determination of the UL duty cycle.
- the terminal 20 determines the P-MPR associated with the determined UL duty cycle based on the association between the UL duty cycle and the P-MPR (S102).
- Fig. 5 shows an example of the association between UL duty cycle and P-MPR.
- UL-duty cycle for example, 100%, 75%, 50%, and 25%
- P-MPR in other words, the upper limit of P-MPR.
- 7dBm, 5dBm, 3dBm, And 0 dBm are associated one to one.
- the association shown in FIG. 5 is shared, for example, between the base station 10 and the terminal 20.
- the association shown in FIG. 5 may be notified (or set) from the base station 10 to the terminal 20, and may be defined in the standard in advance.
- the association between the UL duty cycle and P-MPR is not limited to the example shown in FIG.
- the values of UL duty cycle and P-MPR are not limited to the values shown in FIG.
- the numbers of UL duty cycle and P-MPR candidates are not limited to the example shown in FIG. 5 (for example, 4 candidates).
- the terminal 20 determines the UL transmission power of the UL signal (for example, UL data) using the determined P-MPR, for example (S103).
- the terminal 20 notifies the base station 10 of information indicating the determined UL duty cycle (S104).
- information indicating the UL duty cycle for example, a signal of uplink control information (Uplink Control Information (UCI)) or an uplink control channel (for example, Physical Uplink Control Channel (PUCCH)) may be used.
- UCI Uplink Control Information
- PUCCH Physical Uplink Control Channel
- the timing of UL duty cycle notification is not limited to the example shown in FIG.
- the timing of the UL duty cycle notification may be set to, for example, any of S101 to S105 shown in FIG.
- the terminal 20 transmits UL data to the base station 10 using, for example, the determined UL transmission power (S105).
- the terminal 20 may allocate UL data to UL resources according to, for example, UL allocation information (for example, UL grant) notified from the base station 10 (not shown). Further, the terminal 20 may select the resource used for transmitting the UL signal from the UL resources indicated in the UL grant, for example, based on the UL duty cycle. In other words, the terminal 20 does not have to use a part of the UL resource indicated in UL grant based on the UL duty cycle.
- the base station 10 receives the UL signal (for example, information indicating the UL duty cycle, or UL data) transmitted from the terminal 20.
- the UL signal for example, information indicating the UL duty cycle, or UL data
- the base station 10 may specify the P-MPR corresponding to the UL duty cycle included in the UL signal based on the association between the UL duty cycle and the P-MPR shown in FIG.
- the base station 10 may use the identified P-MPR to determine scheduling for the terminal 20, for example.
- the base station A for example, the base station 10
- the base station B for example, the base station 10
- the base station to which the terminal 20 connects hereinafter, a connection destination base station.
- the method of selecting (in other words, selecting) will be described.
- Terminal 20 is connected to base station A. Further, it is assumed that the base station B is located farther than the base station A with respect to the terminal 20. Therefore, in the terminal 20, it is assumed that the communication quality between the base station B and the terminal 20 is lower than the communication quality between the base station A and the terminal 20.
- the base station A specifies the P-MPR (upper limit value) set in the terminal 20, for example, based on the UL duty cycle included in the UL signal transmitted from the terminal 20.
- FIG. 6 shows, as an example, the states of the DL and UL beams (or the magnitude of transmission power) in Case 3 described later.
- FIG. 7 shows an example of information used for the scheduling process of the terminal 20 (for example, selection of a connecting base station) in Cases 1, 2 and 3.
- FIG. 7 shows a connection destination base station of terminal 20 that can be determined based on a DL signal (denoted as “connection destination based on DL signal”) and an ideal connection to terminal 20.
- An example of a destination base station (denoted as “ideal destination”) is shown.
- Case 1 is a case where there is no shielding by the human body in communication between the terminal 20 and the base station A, and there is no decrease in UL transmission power due to P-MPR. Therefore, in case 1, it is assumed that the communication quality between the base station A and the terminal 20 is good.
- the DL power and UL power of the base station A can be high values, for example, as compared with Cases 2 and 3 described later (for example, represented by “ ⁇ ” in FIG. 7 ).
- the UL power and DL power of the base station A are similar. It may be quality (for example, “ ⁇ ” in FIG. 7).
- the communication quality between the base station B and the terminal 20 is lower than the communication quality between the base station A and the terminal 20 due to the positional relationship with the terminal 20.
- the DL power and the UL power of the base station B may be lower than the DL power and the UL power of the base station A (for example, represented by “ ⁇ ” in FIG. 7 ).
- the base station 10 (base station A or base station B), for example, based on the DL power of the base station A and the base station B with respect to the terminal 20, the connection destination of the terminal 20 (for example, connection in UL).
- the above base station may be selected.
- the base station 10 selects the connection destination base station of the terminal 20 based on the DL power
- the base station A with higher DL power is selected.
- base station A is the ideal connection destination base station for terminal 20 in Case 1.
- the base station 10 can select a base station having a good UL communication quality as the connection destination base station of the terminal 20 based on the DL power.
- Case 2 is a case where the communication between the terminal 20 and the base station A is shielded by the human body and there is no decrease in UL transmission power due to P-MPR. Therefore, in case 2, the communication quality between the base station A and the terminal 20 may be lower than that in case 1 due to the effect of shielding by the human body. For example, in case 2, the DL power and UL power of the base station A are lower than those in case 1 (for example, represented by “ ⁇ ” in FIG. 7).
- the influence of the shielding by the human body affects both DL and UL, so that the UL power and the DL power of the base station A are of the same quality (for example, it can be “ ⁇ ” in FIG. 7.
- the DL power and the UL power of the base station B are lower than the DL power and the UL power of the base station A of Case 1 (for example, “ ⁇ ” in FIG. 7) due to the positional relationship with the terminal 20. It can be a low value (for example, represented as “ ⁇ ” in FIG. 7).
- the base station 10 (base station A or base station B), for example, based on the DL power of the base station A and the base station B for the terminal 20, the connection destination of the terminal 20 (for example, the connection in UL).
- the above base station may be selected.
- the DL power and UL power of both the base station A and the base station B in Case 2 are represented by “ ⁇ ” in comparison with the DL power and UL power of the base station A in Case 1. ..
- the deterioration of the communication quality for the base station A is due to the shielding by the human body
- the deterioration of the communication quality for the base station B is due to the distance to the terminal 20 (in other words, distance attenuation).
- the relationship (for example, size) between the communication quality of the base station A and the communication quality of the base station B in Case 2 may differ depending on the magnitude of the influence of shielding by the human body and distance attenuation. The same applies to DL power in case 3 described later.
- the base station 10 selects the connection destination base station of the terminal 20 based on the DL power, the base station A or the base station B having higher DL power is selected.
- the base station 10 can select a base station with better UL communication quality as the connection destination base station of the terminal 20 based on the DL power.
- Case 2 assumes that there is no decrease in transmission power due to P-MPR, it is not limited to this.
- the decrease in transmission power due to P-MPR is small (in other words, the value of P-MPR is small), and UL and DL communication qualities can be treated as the same level. But it's okay.
- Case 3 is a case where the communication between the terminal 20 and the base station A is shielded by the human body and the UL transmission power is reduced by P-MPR. Therefore, in case 3, the communication quality between the base station A and the terminal 20 may be lower than that in case 1 due to the effect of shielding by the human body. Also, in case 3, UL power decreases due to P-MPR. For example, in case 3, the DL power of the base station A is lower than in case 1 (for example, represented by “ ⁇ ” in FIG. 7 ), and the UL power of the base station A is lower than the DL power (“ ⁇ ” in FIG. 7 ). Low (for example, represented by "x" in FIG. 7).
- the UL power of the base station A (for example, “ ⁇ ” in FIG. 7) is inferior in quality to the DL power (for example, “ ⁇ ” in FIG. 7).
- the DL power and the UL power of the base station B are lower than the DL power and the UL power of the base station A of Case 1 (for example, “ ⁇ ” in FIG. 7) due to the positional relationship with the terminal 20. (For example, represented by “ ⁇ ” in FIG. 7).
- the base station 10 (base station A or base station B) is connected to the terminal 20 (for example, based on the DL power and UL power of the base station A and the base station B with respect to the terminal 20).
- the base station of the connection destination in UL may be selected.
- the communication quality of UL is likely to be better in base station B than in base station A.
- the ideal connection destination base station of the terminal 20 in Case 3 is the base station B.
- the base station 10 selects the base station to which the terminal 20 is connected based on the DL power in case 3 as in case 2, it depends on the size of the influence of the human body shielding and the distance attenuation, as in case 2.
- the base station A or the base station B having a higher DL power is selected based on the different DL power. Therefore, in case 3, the ideal connection destination base station (here, the base station B) may not be selected by the method of selecting the connection destination base station based on the DL power.
- the base station 10 selects the connection destination base station based on the DL power and the UL power
- the base station B having higher UL power is selected due to the difference in UL power between the base station A and the base station B. More likely.
- the base station 10 can select a base station with better UL communication quality as the connection destination base station of the terminal 20 based on the DL power and the UL power.
- the terminal 20 determines the UL transmission power based on the association between the UL duty cycle and the P-MPR.
- the terminal 20 can determine the UL transmission power in consideration of both UL duty cycle and P-MPR, for example. For example, the larger the UL duty cycle value, the larger the P-MPR is set (see, for example, FIG. 5 ).
- the terminal 20 can determine the UL duty cycle and P-MPR according to the transmission power set in the terminal 20 out of the maximum transmission power specified in the Power Class. Therefore, according to the control method 1, the terminal 20 can reduce the UL transmission power without excess and deficiency and transmit the UL signal regardless of which transmission power within the range specified in the Power Class is set. According to the control method 1, for example, the terminal 20 can appropriately set the UL transmission power and satisfy the radio wave protection guideline.
- the base station 10 specifies the P-MPR (for example, the upper limit value) used by the terminal 20, based on the UL duty cycle notified from the terminal 20.
- the base station 10 determines whether the deterioration of the reception quality (for example, reception power) of the UL signal is due to the setting of the P-MPR by the terminal 20 or other factors. It is possible to determine whether the cause is a factor (for example, occlusion by the human body). Therefore, the base station 10 can schedule UL resources (for example, a connection destination base station) for the terminal 20, for example, according to the setting of P-MPR (for example, the presence or absence of a decrease in transmission power).
- the information about the transmission power notified to the terminal by the base station may be described as, for example, information indicating the maximum value of the transmission power (or output power) of the terminal (for example, Pmax). There is).
- Pmax is specified.
- the terminal controls UL transmission power based on Pmax, for example, in the range of Pmax or less.
- Control method 2 describes the case of using Pmax in wireless communication using FR2.
- the base station 10 sets the Pmax set in the terminal 20 based on the association between the maximum transmission power value of the UL signal (for example, Pmax) and the transmission ratio of the UL signal (for example, UL duty cycle). Determine the UL duty cycle corresponding to. Also, the base station 10 determines UL resource allocation to the terminal 20 based on the determined UL duty cycle.
- the terminal 20 receives, for example, information indicating the association between the Pmax and the UL duty cycle and the UL signal allocation determined based on the Pmax set in the terminal 20, from the base station 10, and based on the received information, Determine UL transmit power.
- FIG. 8 is a sequence diagram showing an example of operations of base station 10 and terminal 20 based on control method 2 according to the present embodiment.
- the base station 10 determines Pmax for the terminal 20 (S201).
- the base station 10 determines the UL duty cycle associated with the determined Pmax based on the association between the Pmax and the UL duty cycle (S202).
- Fig. 9 shows an example of the association between Pmax and UL duty cycle.
- UL duty cycle for example, 25%, 50%, 75%, and 100%
- Pmax for example, 35 dBm, 25 dBm, 15 dBm, and 5 dBm
- Pmax and UL duty cycle are not limited to the example shown in FIG.
- the values of Pmax and UL duty cycle are not limited to the values shown in FIG. 9.
- the number of candidates for Pmax and UL duty cycle is not limited to the example shown in FIG. 9 (for example, 4 candidates).
- the smaller the UL duty cycle value the lower the transmission rate of the UL signal in the predetermined period and the lower the transmission power of the UL signal. Therefore, in the association between Pmax and UL duty cycle shown in FIG. 9, the value of UL duty cycle decreases as Pmax increases.
- the base station 10 determines (in other words, schedules) UL allocation to the terminal 20 (S203). For example, the base station 10 may determine UL allocation based on the determined UL duty cycle (in other words, the ratio of UL and DL).
- the base station 10 notifies the terminal 20 of information regarding UL transmission (S204).
- the information on UL transmission may include, for example, Pmax, which is an example of information on UL transmission power, and UL grant, which is an example of information on UL allocation.
- Pmax and UL grant may be notified simultaneously or individually.
- Pmax is higher layer signaling (for example, Radio Resource Control (RRC) signaling, higher layer signaling or higher layer parameter), downlink control information (for example, downlink control information (DCI)), or downlink control channel (for example, , Physical Downlink Control Channel (PDCCH) may be used for notification.
- RRC Radio Resource Control
- DCI downlink control information
- PDCCH Physical Downlink Control Channel
- timing of Pmax notification is not limited to the example shown in FIG.
- the timing of notification of Pmax may be set to any of S201 to S205 shown in FIG.
- the terminal 20 determines the UL transmission power of the UL signal (for example, UL data) using, for example, Pmax notified from the base station 10 (S205).
- the terminal 20 transmits UL data to the base station 10 according to, for example, the UL grant notified from the base station 10 and the determined transmission power (S206).
- the base station 10 receives the UL signal (for example, UL data) transmitted from the terminal 20.
- the base station 10 determines the transmission rate of UL signals (in other words, allocation of UL signals) in a predetermined period based on the association between Pmax and UL duty cycle set in the terminal 20. Thereby, the UL transmission power of the terminal 20 can be set. For example, in Control Method 2, the larger Pmax is, the smaller the value of UL duty cycle is.
- the terminal 20 can satisfy the radio wave protection guideline without excessively reducing the UL transmission power.
- the base station 10 considers both Pmax and UL duty cycle according to the transmission power set in the terminal 20 out of the maximum transmission power specified in the Power Class, and performs UL transmission. You can determine the power. Therefore, according to the control method 2, even when any transmission power within the range specified in the Power Class is set, the terminal 20 reduces the UL transmission power without excess or deficiency while satisfying the radio wave protection guideline. , UL signals can be transmitted.
- the base station 10 sets Pmax to be smaller for the terminal 20.
- Pmax the value of UL duty cycle is set to be larger (see, for example, FIG. 9 ).
- UL signals are distributed and allocated to more time resources, so that the terminal 20 can increase the UL transmission rate and improve UL throughput.
- the base station 10 sets Pmax to be larger for the terminal 20.
- Pmax the value of UL duty cycle is set smaller (see, for example, FIG. 9 ).
- the base station 10 can flexibly control, for example, the throughput and the cell coverage in the cell according to the setting of Pmax.
- the association between Pmax and the UL duty cycle may be shared between the base station 10 and the terminal 20.
- the terminal 20 can specify the UL duty cycle (for example, the upper limit value) set by the base station 10 based on Pmax notified from the base station 10.
- the terminal 20 can reduce the number of UL duty cycle candidates (in other words, the number of patterns of the UL signal transmission ratio) to be considered in order to satisfy the radio wave protection guideline.
- the terminal 20 when the terminal 20 does not satisfy the radio wave protection guideline in the UL duty cycle specified based on the association between the Pmax and the UL duty cycle, the terminal 20 resets one of the UL duty cycle lower than the value of the UL duty cycle. ..
- the terminal 20 may exclude the UL duty cycle higher than the UL duty cycle specified based on the association between the Pmax and the UL duty cycle from the reset targets.
- Control method 3 is a method in which the control method 1 and the control method 2 described above are combined.
- the base station 10 determines the UL duty cycle corresponding to the Pmax set for the terminal 20 based on the association between the Pmax and the UL duty cycle as in the control method 2, and the information indicating the Pmax and the UL Notify the terminal 20 of the grant.
- the terminal 20 controls the transmission power, for example, based on the information (for example, UL grant and Pmax) set in the base station 10.
- the UL duty cycle in other words, the UL signal transmission rate
- the terminal 20 may determine the UL transmission power by using the P-MPR associated with the UL duty cycle that can satisfy the radio wave protection guide, as in the control method 1. Then, the terminal 20 transmits the UL signal to the base station 10 using the determined UL transmission power.
- the terminal 20 may notify the base station 10 of information indicating the set UL duty cycle in the same manner as the control method 1.
- the base station 10 may schedule the terminal 20 based on the P-MPR associated with the UL duty cycle, as in the control method 1.
- the terminal 20 can appropriately set the UL transmission power based on, for example, Pmax, UL duty cycle, and P-MPR for the terminal 20. Therefore, according to the control method 3, the terminal 20 can appropriately set the UL transmission power and satisfy the radio wave protection guideline.
- terminal 20 associates the UL signal transmission ratio (for example, UL duty cycle) with the transmission power parameter (for example, P-MPR or Pmax) in a predetermined period (for example, FIG. 5 or UL transmission power is determined based on (see FIG. 9). Then, terminal 200 transmits the UL signal using the determined UL transmission power.
- the transmission power parameter for example, P-MPR or Pmax
- the terminal 20 can realize appropriate transmission power control within a range satisfying the radio wave protection guideline, for example, based on a combination of both the UL duty cycle and the transmission power parameter.
- Pmax”, P-MPR, and “UL duty cycle” in the above-described embodiments are examples of information regarding transmission power, and the present disclosure is not limited to this. The information regarding the transmission power may be replaced with other terms.
- the base station 10 may communicate with the terminal 20 (see FIG. 3) in the LTE band, FR1 and FR2, for example.
- the base station communicating with the terminal 20 in the LTE band, the base station communicating with the terminal 20 in FR1 and the base station communicating with the terminal 20 in FR2 may be different base stations.
- the base station may support some or all of LTE band communication, FR1 communication, and FR2 communication.
- the terminal 20 according to the above-described embodiment may communicate with the base station 10 in LTE, FR1 and FR2, for example.
- the terminal 20 may be a FR2 standalone (SA) operation.
- the terminal 20 may be a non-standalone (NSA) operation.
- the terminal 20 may communicate with FR2 in combination with at least one of LTE and FR1.
- the terminal 20 may connect to a base station that operates in at least one of LTE and FR1 and a base station that operates in FR2 by Dual Connectivity (DC).
- DC Dual Connectivity
- association between the parameter relating to the transmission rate of the uplink signal and the parameter relating to the UL transmission power is, for example, “association”, “relationship”, “reading”, “interpretation” and “conversion”. It may be read as another expression.
- each functional block may be realized by using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.) and may be implemented using these multiple devices.
- the functional block may be implemented by combining the one device or the plurality of devices with software.
- Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, observation, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but not limited to these.
- I can't.
- functional blocks (components) that function transmission are called a transmitting unit and a transmitter.
- the implementation method is not particularly limited.
- the base station, the terminal, and the like according to the embodiment of the present disclosure may function as a computer that performs the process of the wireless communication method of the present disclosure.
- FIG. 10 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure.
- the base station 10 and the terminal 20 described above 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, and the like.
- the word “device” can be read as a circuit, device, unit, or the like.
- the hardware configurations of the base station 10 and the terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
- Each function in the base station 10 and the terminal 20 causes a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs an operation and controls communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- the processor 1001 operates an operating system to control the entire computer, for example.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
- CPU central processing unit
- the control unit 103 and the control unit 203 described above may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program that causes a computer to execute at least part of the operations described in the above-described embodiments is used.
- the control unit 103 of the base station 10 or the control unit 203 of the terminal 20 may be implemented by a control program stored in the memory 1002 and operating in the processor 1001, or may be implemented similarly for other functional blocks. Good.
- the various processes described above are executed by one processor 1001, they 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 an electric communication line.
- the memory 1002 is a computer-readable recording medium, and is configured by at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be done.
- the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code) that can be executed to implement the wireless communication method according to the embodiment of the present disclosure, a software module, and the like.
- the storage 1003 is a computer-readable recording medium, 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, a Blu-ray disc). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
- the storage 1003 may be called an auxiliary storage device.
- the above-mentioned storage medium may be, for example, a database including at least one of the memory 1002 and the storage 1003, a server, or another appropriate medium.
- 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, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of a frequency division duplex (FDD: Frequency Division Duplex) and a time division duplex (TDD: Time Division Duplex). May be composed of
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) 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).
- 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 for each device.
- the base station 10 and the terminal 20 include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). May be included, and a part or all of each functional block may be realized by the hardware.
- the processor 1001 may be implemented using at least one of these hardware.
- the notification of information is not limited to the aspect/embodiment described in the present disclosure, and may be performed using another method.
- the information is notified by physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by notification information (MIB (Master Information Block), SIB (System Information Block)), another signal, or a combination thereof.
- the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.
- LTE Long Term Evolution
- LTE-A Long Term Evolution
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication
- FRA Full Radio
- NR New Radio
- W-CDMA registered trademark
- GSM registered trademark
- CDMA2000 Code Division Multiple Access 2000
- UMB Universal Mobile Broadband
- IEEE 802.11 Wi-Fi (registered trademark)
- IEEE 802.16 WiMAX (registered trademark)
- IEEE 802.20 UWB (Ultra-WideBand
- Bluetooth registered trademark
- a plurality of systems may be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G).
- the specific operation performed by the base station may be performed by its upper node in some cases.
- the various operations performed for communication with a terminal are the base station and other network nodes than the base station (eg MME or S-GW and the like are conceivable, but not limited to these).
- MME or S-GW network nodes
- a combination of a plurality of other network nodes for example, MME and S-GW may be used.
- Information and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input/output may be performed via a plurality of network nodes.
- the input/output information and the like may be stored in a specific place (for example, a memory), or may be managed using a management table. Information that is input/output may be overwritten, updated, or added. The output information and the like may be deleted. The input information and the like may be transmitted to another device.
- the determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a Boolean value (Boolean: true or false), and may be performed by comparing numerical values (for example, a predetermined value). Value comparison).
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the software uses a wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and/or wireless technology (infrared, microwave, etc.) websites, When sent from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.
- wired technology coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
- wireless technology infrared, microwave, etc.
- Information, signal The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of
- At least one of the channel and the symbol may be a signal (signaling).
- the signal may also be a message.
- a component carrier CC:Component Carrier
- CC Component Carrier
- the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented.
- the radio resources may be those indicated by the index.
- Base station wireless base station
- base station radio base station
- radio base station fixed station
- NodeB nodeB
- eNodeB eNodeB
- gNodeB gNodeB
- a base station may be referred to by terms such as macro cell, small cell, femto cell, and pico cell.
- a base station can accommodate one or more (eg, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being defined by a base station subsystem (eg, indoor small base station (RRH: It is also possible to provide communication service by Remote Radio Head)).
- RRH indoor small base station
- the term "cell” or “sector” refers to part or all of the coverage area of a base station and/or a base station subsystem providing communication services in this coverage.
- Mobile stations are defined by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
- the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned type or unmanned type).
- At least one of the base station and the mobile station also includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be replaced by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (eg, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
- the terminal 20 may have the function of the above-described base station 10.
- the words such as “up” and “down” may be replaced with the words corresponding to the terminal-to-terminal communication (for example, “side”).
- the uplink channel and the downlink channel may be replaced with the side channel.
- the terminal in the present disclosure may be replaced by the base station.
- the base station 10 may have the function of the terminal 20 described above.
- determining and “determining” as used in this disclosure may encompass a wide variety of actions.
- “Judgment”, “decision” means, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigating (investigating), searching (looking up, search, inquiry) (Eg, searching in a table, database, or another data structure), considering ascertaining as “judging” or “deciding”, and the like.
- “decision” and “decision” include receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), access (accessing) (for example, accessing data in a memory) may be regarded as “judging” and “deciding”.
- “judgment” and “decision” are considered to be “judgment” and “decision” when things such as resolving, selecting, choosing, selecting, establishing, and comparing are done. May be included. That is, the “judgment” and “decision” may include considering some action as “judgment” and “decision”.
- “determination (decision)” may be read as “assuming", “expecting", “considering”, and the like.
- connection means any direct or indirect connection or coupling between two or more elements, and It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled.”
- the connections or connections between the elements may be physical, logical, or a combination thereof.
- connection may be read as “access”.
- two elements are in the radio frequency domain, with at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-exhaustive examples. , Can be considered to be “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.
- the reference signal may be abbreviated as RS (Reference Signal), or may be referred to as a pilot (Pilot) depending on the applied standard.
- RS Reference Signal
- Pilot pilot
- the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase “based on” means both "based only on” and “based at least on.”
- references to elements using designations such as “first”, “second” etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements may be employed, or that the first element must precede the second element in any way.
- Parts in the configuration of each device described above may be replaced with “means”, “circuit”, “device”, and the like.
- a radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also be composed of one or more slots in the time domain. The subframe may have a fixed time length (for example, 1 ms) that does not depend on the numerology.
- Numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame configuration, transmission/reception
- SCS subcarrier spacing
- TTI Transmission Time Interval
- At least one of a specific filtering process performed by the device in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.
- a slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
- a slot may be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may be composed of one or more symbols in the time domain. The minislot may also be called a subslot. Minislots may be configured with fewer symbols than slots.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
- Radio frame, subframe, slot, minislot, and symbol all represent the time unit for signal transmission. Radio frames, subframes, slots, minislots, and symbols may have different names corresponding to them.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI means, for example, a minimum time unit of scheduling in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) to each user terminal in units of TTI.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit of a channel-encoded data packet (transport block), code block, codeword, or the like, or may be a processing unit of scheduling, link adaptation, or the like.
- the time interval for example, the number of symbols
- the transport block, code block, codeword, etc. may be shorter than the TTI.
- one slot or one minislot is called a TTI
- one or more TTIs may be the minimum time unit for scheduling.
- the number of slots (the number of mini-slots) forming the minimum time unit of the scheduling may be controlled.
- 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, or the like.
- a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
- the number of subcarriers included in the RB may be determined based on numerology.
- the time domain of the RB may include one or more symbols, and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI in length.
- One TTI, one subframe, etc. may be configured with one or a plurality of resource blocks.
- one or more RBs include a physical resource block (PRB: Physical RB), a subcarrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc. May be called.
- PRB Physical resource block
- SCG Sub-Carrier Group
- REG Resource Element Group
- a resource block may be composed of one or more resource elements (RE: Resource Element).
- RE Resource Element
- 1 RE may be a radio resource area of 1 subcarrier and 1 symbol.
- a bandwidth part (may also be called a partial bandwidth) represents a subset of continuous common RBs (common resource blocks) for a certain neurology in a certain carrier. Good.
- the common RB may be specified by the index of the RB based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within the BWP.
- BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- BWP for UL
- DL BWP DL BWP
- one or more BWPs may be set in one carrier.
- At least one of the configured BWPs may be active, and the UE does not have to expect to send and receive a given signal/channel outside the active BWP.
- “cell”, “carrier”, and the like in the present disclosure may be read as “BWP”.
- the structure of the wireless frame, subframe, slot, minislot, symbol, etc. described above is just an 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, and included in RBs The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be variously changed.
- the “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or the rated maximum transmission power ( It may mean the rated UE maximum transmit power).
- the term “A and B are different” may mean “A and B are different from each other”.
- the term may mean that “A and B are different from C”.
- the terms “remove”, “coupled” and the like may be construed similarly as “different”.
- the notification of the predetermined information (for example, the notification of “being X”) is not limited to the explicit notification, and is performed implicitly (for example, the notification of the predetermined information is not performed). Good.
- One aspect of the present disclosure is useful for mobile communication systems.
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Abstract
Description
図2は、本実施の形態に係る基地局10の構成の一例を示すブロック図である。基地局10は、例えば、送信部101と、受信部102と、制御部103と、を含む。
以下では、基地局10および端末20の動作の制御について、3つの制御方法を例示する。なお、本開示における制御方法は、これら3つの方法に限定されない。
制御方法1では、端末20は、UL信号の送信割合(例えば、UL duty cycle)と、UL送信電力(例えば、最大送信電力)に対する電力バックオフ値(例えば、P-MPR)との関連付けに基づいて、UL送信電力を決定する。
ケース1は、端末20と基地局Aとの間の通信において人体による遮蔽が無く、P-MPRによるUL送信電力の低下が無い場合である。よって、ケース1では、基地局Aと端末20との間の通信品質は良好であるとする。ケース1では、基地局AのDL電力およびUL電力は、例えば、後述するケース2および3と比較して高い値になり得る(例えば、図7において「○」と表す)。
ケース2は、端末20と基地局Aとの間の通信において人体による遮蔽が有り、P-MPRによるUL送信電力の低下が無い場合である。よって、ケース2では、人体による遮蔽の影響によって、基地局Aと端末20との間の通信品質はケース1と比較して低下し得る。例えば、ケース2では、基地局AのDL電力およびUL電力はケース1よりも低い(例えば、図7において「△」と表す)。
ケース3は、端末20と基地局Aとの間の通信において人体による遮蔽が有り、P-MPRによるUL送信電力の低下が有る場合である。よって、ケース3では、人体による遮蔽の影響によって、基地局Aと端末20との間の通信品質はケース1と比較して低下し得る。また、ケース3では、P-MPRによってUL電力が低下する。例えば、ケース3では、基地局AのDL電力はケース1よりも低く(例えば、図7において「△」と表す)、基地局AのUL電力はDL電力(図7では「△」)よりも低い(例えば、図7において「×」と表す)。
FR1を使用する無線通信では、基地局によって端末に通知される送信電力に関する情報に、例えば、端末の送信電力(又は出力電力)の最大値を示す情報(例えば、Pmaxと記載されることがある)がある。
制御方法3は、上述した制御方法1および制御方法2を組み合わせた方法である。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
情報の通知は、本開示において説明した態様/実施形態に限られず、他の方法を用いて行われてもよい。例えば、情報の通知は、物理レイヤシグナリング(例えば、DCI(Downlink Control Information)、UCI(Uplink Control Information))、上位レイヤシグナリング(例えば、RRC(Radio Resource Control)シグナリング、MAC(Medium Access Control)シグナリング、報知情報(MIB(Master Information Block)、SIB(System Information Block)))、その他の信号又はこれらの組み合わせによって実施されてもよい。また、RRCシグナリングは、RRCメッセージと呼ばれてもよく、例えば、RRC接続セットアップ(RRC Connection Setup)メッセージ、RRC接続再構成(RRC Connection Reconfiguration)メッセージなどであってもよい。
本開示において説明した各態様/実施形態は、LTE(Long Term Evolution)、LTE-A(LTE-Advanced)、SUPER 3G、IMT-Advanced、4G(4th generation mobile communication system)、5G(5th generation mobile communication system)、FRA(Future Radio Access)、NR(New Radio)、W-CDMA(登録商標)、GSM(登録商標)、CDMA2000、UMB(Ultra Mobile Broadband)、IEEE 802.11(Wi-Fi(登録商標))、IEEE 802.16(WiMAX(登録商標))、IEEE 802.20、UWB(Ultra-WideBand)、Bluetooth(登録商標)、その他の適切なシステムを利用するシステム及びこれらに基づいて拡張された次世代システムの少なくとも一つに適用されてもよい。また、複数のシステムが組み合わされて(例えば、LTE及びLTE-Aの少なくとも一方と5Gとの組み合わせ等)適用されてもよい。
本開示において説明した各態様/実施形態の処理手順、シーケンス、フローチャートなどは、矛盾の無い限り、順序を入れ替えてもよい。例えば、本開示において説明した方法については、例示的な順序を用いて様々なステップの要素を提示しており、提示した特定の順序に限定されない。
本開示において基地局によって行われるとした特定動作は、場合によってはその上位ノード(upper node)によって行われることもある。基地局を有する1つ又は複数のネットワークノード(network nodes)からなるネットワークにおいて、端末との通信のために行われる様々な動作は、基地局及び基地局以外の他のネットワークノード(例えば、MME又はS-GWなどが考えられるが、これらに限られない)の少なくとも1つによって行われ得ることは明らかである。上記において基地局以外の他のネットワークノードが1つである場合を例示したが、複数の他のネットワークノードの組み合わせ(例えば、MME及びS-GW)であってもよい。
情報等(※「情報、信号」の項目参照)は、上位レイヤ(又は下位レイヤ)から下位レイヤ(又は上位レイヤ)へ出力され得る。複数のネットワークノードを介して入出力されてもよい。
入出力された情報等は特定の場所(例えば、メモリ)に保存されてもよいし、管理テーブルを用いて管理してもよい。入出力される情報等は、上書き、更新、又は追記され得る。出力された情報等は削除されてもよい。入力された情報等は他の装置へ送信されてもよい。
判定は、1ビットで表される値(0か1か)によって行われてもよいし、真偽値(Boolean:true又はfalse)によって行われてもよいし、数値の比較(例えば、所定の値との比較)によって行われてもよい。
ソフトウェアは、ソフトウェア、ファームウェア、ミドルウェア、マイクロコード、ハードウェア記述言語と呼ばれるか、他の名称で呼ばれるかを問わず、命令、命令セット、コード、コードセグメント、プログラムコード、プログラム、サブプログラム、ソフトウェアモジュール、アプリケーション、ソフトウェアアプリケーション、ソフトウェアパッケージ、ルーチン、サブルーチン、オブジェクト、実行可能ファイル、実行スレッド、手順、機能などを意味するよう広く解釈されるべきである。
本開示において説明した情報、信号などは、様々な異なる技術のいずれかを使用して表されてもよい。例えば、上記の説明全体に渡って言及され得るデータ、命令、コマンド、情報、信号、ビット、シンボル、チップなどは、電圧、電流、電磁波、磁界若しくは磁性粒子、光場若しくは光子、又はこれらの任意の組み合わせによって表されてもよい。
本開示において使用する「システム」及び「ネットワーク」という用語は、互換的に使用される。
また、本開示において説明した情報、パラメータなどは、絶対値を用いて表されてもよいし、所定の値からの相対値を用いて表されてもよいし、対応する別の情報を用いて表されてもよい。例えば、無線リソースはインデックスによって指示されるものであってもよい。
本開示においては、「基地局(BS:Base Station)」、「無線基地局」、「固定局(fixed station)」、「NodeB」、「eNodeB(eNB)」、「gNodeB(gNB)」、「アクセスポイント(access point)」、「送信ポイント(transmission point)」、「受信ポイント(reception point)」、「送受信ポイント(transmission/reception point)」、「セル」、「セクタ」、「セルグループ」、「キャリア」、「コンポーネントキャリア」などの用語は、互換的に使用され得る。基地局は、マクロセル、スモールセル、フェムトセル、ピコセルなどの用語で呼ばれる場合もある。
本開示においては、「移動局(MS:Mobile Station)」、「ユーザ端末(user terminal)」、「ユーザ装置(UE:User Equipment)」、「端末」などの用語は、互換的に使用され得る。
基地局及び移動局の少なくとも一方は、送信装置、受信装置、通信装置などと呼ばれてもよい。なお、基地局及び移動局の少なくとも一方は、移動体に搭載されたデバイス、移動体自体などであってもよい。当該移動体は、乗り物(例えば、車、飛行機など)であってもよいし、無人で動く移動体(例えば、ドローン、自動運転車など)であってもよいし、ロボット(有人型又は無人型)であってもよい。なお、基地局及び移動局の少なくとも一方は、必ずしも通信動作時に移動しない装置も含む。例えば、基地局及び移動局の少なくとも一方は、センサなどのIoT(Internet of Things)機器であってもよい。
本開示で使用する「判断(determining)」、「決定(determining)」という用語は、多種多様な動作を包含する場合がある。「判断」、「決定」は、例えば、判定(judging)、計算(calculating)、算出(computing)、処理(processing)、導出(deriving)、調査(investigating)、探索(looking up、search、inquiry)(例えば、テーブル、データベース又は別のデータ構造での探索)、確認(ascertaining)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、受信(receiving)(例えば、情報を受信すること)、送信(transmitting)(例えば、情報を送信すること)、入力(input)、出力(output)、アクセス(accessing)(例えば、メモリ中のデータにアクセスすること)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、解決(resolving)、選択(selecting)、選定(choosing)、確立(establishing)、比較(comparing)などした事を「判断」「決定」したとみなす事を含み得る。つまり、「判断」「決定」は、何らかの動作を「判断」「決定」したとみなす事を含み得る。また、「判断(決定)」は、「想定する(assuming)」、「期待する(expecting)」、「みなす(considering)」などで読み替えられてもよい。
本開示において説明した各態様/実施形態は単独で用いてもよいし、組み合わせて用いてもよいし、実行に伴って切り替えて用いてもよい。また、所定の情報の通知(例えば、「Xであること」の通知)は、明示的に行うものに限られず、暗黙的(例えば、当該所定の情報の通知を行わない)ことによって行われてもよい。
20 端末
101,202 送信部
102,201 受信部
103,203 制御部
Claims (5)
- 所定期間における上り信号の送信割合を示す第1パラメータと上り送信電力に関する第2パラメータとの関連付けに基づいて、前記上り信号の送信電力を決定する制御部と、
前記送信電力を用いて、前記上り信号を送信する送信部と、
を備える端末。 - 前記第2パラメータは、前記送信電力を低下するためのバックオフ値を示し、
前記関連付けにおいて、前記送信割合が高いほど、前記バックオフ値は大きい、
請求項1に記載の端末。 - 前記第2パラメータは、前記上り信号の最大送信電力値を示し、
前記関連付けにおいて、前記最大送信電力値が大きいほど、前記送信割合は低い、
請求項1に記載の端末。 - 前記関連付けおよび前記端末に設定される前記第2パラメータに基づいた前記上り信号の割り当てを示す情報を受信する受信部、をさらに備え、
前記制御部は、前記情報に基づいて、前記送信電力を決定する、
請求項1に記載の端末。 - 所定期間における上り信号の送信割合を示す第1パラメータと上り送信電力に関する第2パラメータとの関連付けに基づいて、前記上り信号の送信電力を決定し、
前記送信電力を用いて、前記上り信号を送信する、
無線通信方法。
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CA3126686A CA3126686A1 (en) | 2019-02-22 | 2019-02-22 | Terminal and wireless communication method |
CN201980092775.7A CN113455058A (zh) | 2019-02-22 | 2019-02-22 | 终端以及无线通信方法 |
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US9019880B2 (en) * | 2011-08-11 | 2015-04-28 | Qualcomm Incorporated | Methods and apparatus for overload mitigation using uplink transmit power backoff |
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Non-Patent Citations (2)
Title |
---|
"NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone (Release 15", 3GPP TS 38.101-2, December 2018 (2018-12-01) |
"UL Duty Cycle Dependent Power Boost for NR, Applicability to HPUE", 3GPP TSG RAN WG4 ADHOC_TSGR4_NR_JUN2017_ R4-1706614, 29 June 2017 (2017-06-29), XP051302661 * |
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