WO2019193729A1 - ユーザ装置及び基地局装置 - Google Patents
ユーザ装置及び基地局装置 Download PDFInfo
- Publication number
- WO2019193729A1 WO2019193729A1 PCT/JP2018/014640 JP2018014640W WO2019193729A1 WO 2019193729 A1 WO2019193729 A1 WO 2019193729A1 JP 2018014640 W JP2018014640 W JP 2018014640W WO 2019193729 A1 WO2019193729 A1 WO 2019193729A1
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- WIPO (PCT)
- Prior art keywords
- preamble
- user apparatus
- base station
- setting range
- target power
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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
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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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
- H04W52/30—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
- H04W52/362—Aspects of the step size
Definitions
- the present invention relates to a user apparatus and a base station apparatus in a wireless communication system.
- 5G or NR New Radio
- 5G or NR New Radio
- 5G various wireless technologies are being studied in order to satisfy the requirement to achieve a delay of 1 ms or less while achieving a throughput of 10 Gbps or more.
- Non-Patent Document 1 In NR, wireless communication using millimeter waves is being studied, and it is assumed that a wide range of frequencies up to a higher frequency band than LTE (Long Term Evolution) is used. In particular, since propagation loss increases in a high frequency band, application of beam forming with a narrow beam width is being studied in order to compensate for the propagation loss (for example, Non-Patent Document 1).
- LTE Long Term Evolution
- the parameter setting range for performing power control necessary for initial access may be increased in order to support a wide frequency band.
- the present invention has been made in view of the above points, and an object thereof is to appropriately set parameters relating to power control necessary for initial access.
- a reception unit that acquires information related to preamble reception target power from a base station device, and a setting range of a preamble reception target power configured by a plurality of power values are changed to the preamble reception target power.
- a user apparatus comprising: a control unit that determines preamble transmission power based on the information and the changed setting range; and a transmission unit that transmits a preamble to the base station apparatus with the determined preamble transmission power.
- LTE Long Term Evolution
- LTE-Advanced LTE-Advanced and subsequent schemes (eg, NR).
- SS Synchronization ⁇ Signal
- PSS Primary SS
- SSS Secondary SS
- PBCH Physical broadcast channel
- PRACH Physical
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- the Duplex method may be a TDD (Time Division Division Duplex) method, an FDD (Frequency Division Duplex) method, or other (for example, Flexible Duplex). This method may be used.
- transmitting a signal using a transmission beam may be transmitting a signal multiplied by a precoding vector (precoded with a precoding vector). Similarly, receiving a signal using a receive beam may be multiplying the received signal by a predetermined weight vector. Moreover, transmitting a signal using a transmission beam may be transmitting a signal at a specific antenna port. Similarly, receiving a signal using a receive beam may be receiving a signal at a particular antenna port.
- An antenna port refers to a logical antenna port or a physical antenna port defined in the 3GPP standard.
- the method of forming the transmission beam and the reception beam is not limited to the above method.
- a method of changing the angle of each antenna may be used, or a method of combining a method of using a precoding vector and a method of changing the angle of an antenna is used.
- different antenna panels may be switched and used, or a method of combining a plurality of antenna panels may be used, or other methods may be used.
- a plurality of different transmission beams may be used in the high frequency band. The use of multiple transmission beams is called multi-beam operation, and the use of one transmission beam is called single beam operation.
- “to be set” of a radio parameter or the like may mean that a predetermined value is set (Pre-configure) or specified in advance, The wireless parameter notified from the user apparatus 200 may be set.
- FIG. 1 is a diagram illustrating a configuration example (1) of a wireless communication system according to an embodiment of the present invention.
- wireless communications system in embodiment of this invention contains the base station apparatus 100 and the user apparatus 200 as FIG. 1 shows. Although one base station apparatus 100 and one user apparatus 200 are shown in FIG. 1, this is an example, and there may be a plurality of each.
- the base station apparatus 100 is a communication apparatus that provides one or more cells and performs wireless communication with the user apparatus 200.
- the base station apparatus 100 transmits a synchronization signal and system information to the user apparatus 200.
- the synchronization signal is, for example, PSS and SSS.
- System information is transmitted, for example, by PBCH.
- the system information is also called notification information.
- Both the base station apparatus 100 and the user apparatus 200 can transmit and receive signals to which beamforming is applied.
- the user apparatus 200 is a communication module corresponding to NB-IoT or category M, and has a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine).
- a communication device may be used.
- the user apparatus 200 is wirelessly connected to the base station apparatus 100 and uses various communication services provided by the wireless communication system.
- the user apparatus 200 transmits a random access preamble signal to the base station apparatus 100.
- the random access is performed based on the system information by PDSCH (Physical downlink shared channel) in addition to the system information by PBCH received from the base station apparatus 100.
- the information acquired from the base station apparatus 100 includes information indicating the preamble reception target power.
- the user apparatus 200 performs UL transmission based on UL (Uplink) scheduling received from the base station apparatus 100.
- FIG. 2 is a diagram illustrating a configuration example (2) of the wireless communication system according to the embodiment of the present invention.
- the base station apparatus 100 includes a BBU (Baseband Unit) 101, an RRH (Remote Radio Unit) 102, a DAS (Distributed Unit System) 103, and an antenna unit (Distributed Units) 104 shown in FIG.
- BBU Baseband Unit
- RRH Remote Radio Unit
- DAS Distributed Unit System
- antenna unit Distributed Units
- the BBU 101 is a baseband unit and processes baseband signals received via the RRH 102, the DAS 103, and the antenna unit 104.
- the RRH 102 is a device that executes processing of the radio unit.
- the RRH 102 and the BBU 101 may be connected by an optical cable, for example.
- the DAS 103 is a system having a plurality of distributed antenna units 104.
- the DAS 103 can improve coverage by using a large number of antenna units 104 such as 256 shown in FIG.
- FIG. 3 is a flowchart for explaining an example of a random access procedure in the embodiment of the present invention.
- the base station apparatus 100 transmits PSS, SSS, and PBCH to the user apparatus 200.
- the PBCH includes a part of system information.
- the transmission counter is set to “1”.
- step S11 the user apparatus 200 is based on information for identifying a resource for executing a random access procedure received from the base station apparatus 100, that is, a RACH resource and a preamble format specified in the frequency domain and the time domain. Select a resource to use for random access. Subsequently, the user apparatus 200 performs power ramping processing based on the preamble reception target power and the transmission counter notified from the base station apparatus 100 to determine the transmission power of the random access preamble, and uses the selected resource.
- a random access preamble is transmitted to the base station apparatus 100 (S12). Details of the procedure for determining the transmission power of the random access preamble will be described later.
- step S13 the base station apparatus 100 transmits a random access response to the user apparatus 200.
- the random access response is a response to the random access preamble, is transmitted to the RA-RNTI (Random Access-Radio Network Temporary Identifier) on the PDCCH, and at least the identifier of the random access preamble, the timing alignment, the initial uplink grant, and the temporary C -Includes RNTI (Temporary Cell-Radio Network Temporary Identifier).
- RA-RNTI Random Access-Radio Network Temporary Identifier
- RNTI Temporary Cell-Radio Network Temporary Identifier
- step S14 the user apparatus 200 performs uplink transmission based on the uplink grant included in the random access response.
- uplink transmission at least RRC (Radio Resource Control) connection request and NAS (Non-Access Stratum) UE (User Equipment) identifier are transmitted.
- a control element is transmitted.
- the MAC control element is used for contention resolution.
- the collision resolution (step S14) is performed when the collision type random access procedure is executed, and may not be performed when the non-collision type random access procedure is executed. If the MAC control element matches part or all of the data transmitted in step S14 (YES in S14), the user apparatus 200 proceeds to step S15. If not matched (NO in S14), the user apparatus 200 proceeds to step S16. move on.
- step S15 the user apparatus 200 considers that the random access is successful, sets the temporary C-RNTI as C-RNTI, and ends the random access procedure.
- step S16 the user apparatus 200 determines whether the transmission counter is notified or whether a predetermined upper limit is exceeded. If the upper limit is exceeded (YES in S16), the process proceeds to step S17. If the upper limit is not exceeded (NO in S16), the process proceeds to step S18.
- step S17 the user apparatus 200 considers that the random access has failed, and ends the random access procedure.
- step S18 the user apparatus 200 increments the transmission counter by 1, returns to step S11 to retransmit the random access preamble, and again selects a random access resource.
- the transmission power P PRACH, f, c of the random access preamble is calculated by the following equation.
- P PRACH, f, c (i) min ⁇ P CMAX, f, c (i), P PRACH, target + PL f, c ⁇ f: Carrier f c: Serving cell c i: Transmission section i P CMAX, f, c : Maximum transmission power P PRACH, target : Target received power PL f, c in the base station apparatus 100 and propagation loss in the carrier f and the serving cell c
- P PRACH, target that is, preamble reception target power
- P PRACH, target that is, preamble reception target power
- the notification may be performed via an information element “premiumReceivedTargetPower”.
- a parameter “preambleInitialReceivedTargetPower” corresponding to “preambleReceivedTargetPower” The setting range was defined as -120 dBm to -90 dBm.
- preambleReceivedTargetPower is set to a lower reception power when compared with LTE such as ⁇ 196 dBm.
- preambleReceivedTargetPower is set by “preambleReceivedTargetPower” including the DL-UL coupling loss in use of SUL (Supplemental UL), which is one of the NR scenarios, that is, the compensation of the quality difference due to the frequency difference.
- SUL refers to a UL resource provided separately from a normal UL for improving UL coverage.
- the preamble reception target power needs to be set to a high reception power such as ⁇ 60 dBm.
- the required setting range of the preamble reception target power becomes large. Therefore, it is assumed that the number of bits for signaling preamble reception target power to user apparatus 200 increases. In addition, even when parameters indicating different preamble reception target powers are defined for each use case, it is assumed that the number of bits for signaling to user apparatus 200 increases.
- the setting range is limited without increasing the upper limit value of the setting range of the preamble reception target power and the required quality of the PRACH is satisfied by the power ramping process at the time of PRACH retransmission, the PRACH is retransmitted, It is assumed that a delay will occur.
- the step width of the setting range (Value range) of the preamble reception target power composed of a plurality of power values may be increased.
- the step width may be changed only for a part of the setting range of the preamble reception target power, or the step width may be changed for the entire setting range of the preamble reception target power.
- information indicating a range in which the step width is changed in the preamble reception target power setting range may be notified from the base station apparatus 100 to the user apparatus 200.
- the information indicating the range to be changed includes the first value for changing the step width or an index indicating the first value, the applied step width, and the last value or the last value for changing the step width. May be included.
- the first value may be the minimum received power value in the range to be changed, and the last value may be the maximum received power value in the range to be changed.
- the scaling factor may be notified from the base station apparatus 100 to the user apparatus 200.
- the user apparatus 200 may change the step width of the setting range of the preamble reception target power based on the notified scaling factor.
- the step width change in the preamble reception target power setting range may be applied only in a specific case.
- the step width change may be applied, or the PRACH may be performed using SUL or non-SUL (Normal UL, Legacy UL).
- SUL Service UL, Legacy UL
- the change in the step width may be applied.
- the range to be referred to may be changed in the preamble reception target power setting range depending on the UL type for transmitting the PRACH.
- the UL type is, for example, SUL or non-SUL.
- the setting range of the preamble reception target power may be individually defined for SUL and non-SUL, and the setting range of the preamble reception target power to be referenced may be switched by the UL that transmits the preamble.
- the preamble reception target power setting range suitable for the UL can be defined depending on whether the preamble is transmitted to the SUL or the non-SUL.
- the user apparatus 200 may autonomously switch the setting range, the user apparatus 200 may switch the setting range based on an instruction from the network, or a path loss, SINR (Signal- The user apparatus 200 may switch the setting range based on DL or UL quality such as to-interference (noise ratio), RSRP (Reference Signal Received Power), or RSRQ (Reference Signal Received Quality).
- SINR Signal- The user apparatus 200 may switch the setting range based on DL or UL quality such as to-interference (noise ratio), RSRP (Reference Signal Received Power), or RSRQ (Reference Signal Received Quality).
- an offset may be applied in accordance with the UL that transmits the preamble in the setting range of the existing preamble reception target power.
- the offset it is possible to define a preamble reception target power setting range suitable for each use case and to prevent an increase in the number of bits required for signaling.
- the offset applied to the SUL and the offset applied to the non-SUL the entire setting range applied to each UL can be shifted.
- the user apparatus 200 when transmitting a preamble in the SUL, the user apparatus 200 sets the offset to zero or does not apply the offset.
- the user apparatus 200 may refer to a setting range of a preamble reception target power to which an offset is applied.
- the offset may be a positive value or a negative value.
- the offset may be determined based on a DL-UL coupling loss assumed for the SUL or a value obtained by rounding up the DL-UL coupling loss by a predetermined unit.
- the user apparatus 200 may calculate the DL-UL coupling loss, and the user apparatus 200 itself may determine an offset based on the DL-UL coupling loss and apply it to the setting range of the preamble reception target power.
- the network may notify the user apparatus 200 whether or not the offset is applied.
- the SUL preamble transmission power is lower than the non-SUL preamble transmission power.
- the setting range of the preamble reception target power may be changed.
- the user apparatus 200 autonomously sets the setting range according to SUL or non-SUL.
- the user apparatus 200 may switch the setting range based on an instruction from the network, or the user apparatus 200 may change the setting range based on DL or UL quality such as path loss, SINR, RSRP, or RSRQ.
- the user apparatus 200 may switch the setting range based on the magnitude of the DL-UL coupling loss, or the user apparatus 200 may change the setting range based on the frequency of DL and UL or a combination of frequencies. You may switch.
- the UL type determined above may be a DL type.
- the setting range of the preamble reception target power to be referenced may be switched or the offset may be switched according to the type of DL.
- switching is performed so that the setting range of the preamble reception target power to be referred to is changed by SUL or non-SUL.
- any parameter in which the setting range of the preamble reception target power may be different.
- it may be switched so that the setting range is changed for use cases.
- the parameters may be changed for PRACH, or the parameters may be changed for other channels.
- the network supports SUL it may be determined whether or not to change the preamble reception target power setting range.
- the step width applied to the preamble reception target power setting range may extend from the lower limit of the power value setting range to a predetermined value, or from the upper limit of the power value setting range to a predetermined value. May be widened, or an intermediate portion not including the upper and lower limits of the power value setting range may be widened.
- the setting range of the preamble reception target power to which the step width change is applied may be the setting range of the preamble reception target power defined by LTE.
- non-SUL may be expressed as Normal UL, or may be expressed as legacy UL.
- the user apparatus 200 acquires information on the preamble reception target power from the base station apparatus 100, changes the setting range of the preamble reception target power as necessary, and transmits when performing initial access. It is possible to appropriately control the transmission power of the random access preamble.
- the base station apparatus 100 and the user apparatus 200 include functions for implementing the above-described embodiments. However, each of the base station apparatus 100 and the user apparatus 200 may have only some functions in the embodiments.
- FIG. 4 is a diagram illustrating an example of a functional configuration of the base station device 100.
- the base station apparatus 100 includes a transmission unit 110, a reception unit 120, a setting information management unit 130, and an initial access setting unit 140.
- the functional configuration shown in FIG. 4 is merely an example. As long as the operation
- 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 reception 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. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, and the like to the user apparatus 200. For example, the transmission unit 110 transmits broadcast information or UL scheduling including information used for initial access to the user apparatus 200, and the reception unit 120 has a function of receiving a RACH preamble from the user apparatus 200.
- the setting information management unit 130 stores setting information set in advance and various setting information to be transmitted to the user apparatus 200.
- the content of the setting information is, for example, information related to the initial access control parameter.
- the initial access setting unit 140 notifies the user device 200 of information used for initial access, receives a random access preamble transmitted from the user device 200, and transmits a random access response. Etc.
- FIG. 5 is a diagram illustrating an example of a functional configuration of the user device 200.
- the user apparatus 200 includes a transmission unit 210, a reception unit 220, a setting information management unit 230, and an initial access control unit 240.
- the functional configuration shown in FIG. 5 is merely an example. As long as the operation
- the transmission unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
- the receiving unit 220 wirelessly receives various signals and acquires higher layer signals from the received physical layer signals.
- the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals and the like transmitted from the base station apparatus 100.
- the transmission unit 210 has a function of transmitting NR-PRACH, NR-PUSCH, and the like to the base station apparatus 100.
- the setting information management unit 230 stores various setting information received from the base station apparatus 100 or the user apparatus 200 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 related to the initial access control parameter.
- the initial access control unit 240 generates a preamble and a message for initial access transmitted from the user apparatus 200 to the base station apparatus 100. Further, the initial access control unit 240 controls the transmission power of the preamble for initial access based on the initial access control parameters received from the base station apparatus 100.
- a function unit related to signal transmission in the initial access control unit 240 may be included in the transmission unit 210, and a function unit related to signal reception in the initial access control unit 240 may be included in the reception unit 220.
- each functional block may be realized by one device in which a plurality of elements are physically and / or logically combined, or two or more devices physically and / or logically separated may be directly and directly. It may be realized by a plurality of these devices connected indirectly (for example, wired and / or wirelessly).
- both the base station apparatus 100 and the user apparatus 200 according to the embodiment of the present invention may function as a computer that performs processing according to the embodiment of the present invention.
- FIG. 6 is a diagram illustrating an example of a hardware configuration of a radio communication apparatus that is the base station apparatus 100 or the user apparatus 200 according to the embodiment of the present invention.
- Each of the base station apparatus 100 and the user apparatus 200 described above is physically 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.
- the term “apparatus” 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 a plurality of apparatuses indicated by 1001 to 1006 shown in the figure, or may be configured not to include some apparatuses. May be.
- Each function in the base station apparatus 100 and the user apparatus 200 is performed by causing the processor 1001 to perform computation by reading predetermined software (program) on hardware such as the processor 1001 and the storage device 1002, and the communication by the communication apparatus 1004. This is realized by controlling reading and / or writing of data in the storage device 1002 and the auxiliary storage device 1003.
- the processor 1001 controls the entire computer by operating an operating system, 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 processor 1001 reads a program (program code), software module, or data from the auxiliary storage device 1003 and / or the communication device 1004 to the storage device 1002, and executes various processes according to these.
- a program program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
- the transmission unit 110, the reception unit 120, the setting information management unit 130, and the initial access setting unit 140 of the base station device 100 illustrated in FIG. 4 are realized by a control program stored in the storage device 1002 and operating on the processor 1001. May be.
- the storage device 1002 runs on the processor 1001. It may be realized by. Although the above-described various processes have been described as being 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. Note that the program may be transmitted from a network via a telecommunication line.
- the storage device 1002 is a computer-readable recording medium.
- the storage device 1002 is at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. 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 processing according to the embodiment of the present invention.
- the auxiliary storage device 1003 is a computer-readable recording medium, such as an optical disc such as a CD-ROM (Compact Disc) ROM, a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray). -Ray (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, etc.
- the auxiliary storage device 1003 may be referred to as an auxiliary storage device.
- the above-described storage medium may be, for example, a database including the storage device 1002 and / or the auxiliary storage device 1003, a server, or 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 referred to as a network device, a network controller, a network card, a communication module, or the like.
- the transmission unit 110 and the reception unit 120 of the base station device 100 may be realized by the communication device 1004.
- the transmission unit 210 and the reception unit 220 of the user device 200 may be realized by the communication device 1004.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts 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 have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
- the base station apparatus 100 and the user apparatus 200 each 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.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- the hardware may be configured, and a part or all of each functional block may be realized by the hardware.
- the processor 1001 may be implemented by at least one of these hardware.
- the setting range of the preamble reception target power composed of the reception unit that acquires information related to the preamble reception target power from the base station apparatus and a plurality of power values.
- a control unit that determines preamble transmission power based on the information related to the preamble reception target power and the changed setting range, and transmits the preamble to the base station apparatus with the determined preamble transmission power
- the user apparatus 200 acquires information on the preamble reception target power from the base station apparatus 100, changes the setting range of the preamble reception target power as necessary, and transmits when performing initial access. It is possible to appropriately control the transmission power of the random access preamble. That is, it is possible to appropriately set parameters related to power control necessary for initial access.
- the control unit may change the step value of the power value so as to increase in the setting range of the preamble reception target power according to the type of UL that transmits the preamble.
- the user apparatus 200 can change the setting range of the preamble reception target power as necessary according to the UL type.
- the control unit may switch the setting range of the preamble reception target power according to the type of UL that transmits the preamble.
- the user apparatus 200 can change the setting range of the preamble reception target power as necessary according to the UL type.
- the control unit may switch the offset applied to the setting range of the preamble reception target power according to the type of UL that transmits the preamble.
- the user apparatus 200 can change the setting range of the preamble reception target power as necessary according to the UL type.
- the control unit may determine the offset based on a value obtained by calculating a coupling loss between DL and UL. With this configuration, the user apparatus 200 can change the setting range of the preamble reception target power according to the calculated coupling loss value.
- a base station apparatus including a reception unit that receives a preamble transmitted at a preamble transmission power determined by the user apparatus based on information on target power and a notification of changing the setting range.
- the user apparatus 200 acquires information on the preamble reception target power from the base station apparatus 100, changes the setting range of the preamble reception target power as necessary, and transmits when performing initial access. It is possible to appropriately control the transmission power of the random access preamble. That is, it is possible to appropriately set parameters related to power control necessary for initial access.
- the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the base station apparatus 100 and the user apparatus 200 have been described using functional block diagrams. However, such apparatuses may be realized by 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 a random access memory (RAM), a flash memory, and a read, respectively. 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.
- notification of information is not limited to the aspect / embodiment described in the present specification, and may be performed by other methods.
- notification of information includes 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 broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof, and RRC signaling may be referred to as an RRC message. It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- RRC Connection Setup RRC Connection Setup
- RRC Connection Reconfiguration RRC Connection Reconfiguration
- Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced 4G, 5G, FRA (Future Radio Access), W-CDMA.
- LTE Long Term Evolution
- LTE-A Long Term Evolution-Advanced
- SUPER 3G IMT-Advanced 4G
- 5G FRA (Future Radio Access)
- W-CDMA Wideband
- GSM registered trademark
- CDMA2000 Code Division Multiple Access 2000
- UMB User Mobile Broadband
- IEEE 802.11 Wi-Fi
- IEEE 802.16 WiMAX
- IEEE 802.20 UWB (Ultra-WideBand
- the present invention may be applied to a Bluetooth (registered trademark), a system using other appropriate systems, and / or a next generation system extended based on these systems.
- the specific operation performed by the base station apparatus 100 may be performed by the upper node in some cases.
- various operations performed for communication with the user apparatus 200 are other than the base station apparatus 100 and / or the base station apparatus 100.
- it can be done by other network nodes (for example, but not limited to MME or S-GW).
- MME Mobility Management Entity
- S-GW Serving Mobility Management Entity
- the user equipment 200 can be obtained by those skilled in the art from a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, It may also be referred to as a wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.
- Base station apparatus 100 may also be referred to by those skilled in the art as NB (NodeB), eNB (evolved NodeB), gNB, Base Station, or some other appropriate terminology.
- NB NodeB
- eNB evolved NodeB
- gNB Base Station
- determining may encompass a wide variety of actions.
- “Judgment” and “determination” are, for example, judgment (judging), calculation (calculating), calculation (processing), processing (deriving), investigating (investigating), searching (looking up) (for example, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like.
- “determination” and “determination” are reception (for example, receiving information), transmission (for example, transmitting information), input (input), output (output), and access. (Accessing) (eg, accessing data in a memory) may be considered as “determined” or “determined”.
- determination and “determination” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
- 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.”
- the initial access control unit 240 is an example of a control unit.
- the initial access setting unit 140 is an example of a setting unit.
- the transmission unit 110 is an example of a transmission unit and a notification unit.
- Base station apparatus 101 BBU 102 RRH 103 DAS 104 antenna unit 110 transmission unit 120 reception unit 130 setting information management unit 140 initial access setting unit 200 user device 210 transmission unit 220 reception unit 230 setting information management unit 240 initial access control unit 1001 processor 1002 storage device 1003 auxiliary storage device 1004 communication device 1005 Input device 1006 Output device
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- Mobile Radio Communication Systems (AREA)
Abstract
Description
PPRACH,f,c(i)=min{PCMAX,f,c(i),PPRACH,target+PLf,c}
f:キャリアf
c:サービングセルc
i:送信区間i
PCMAX,f,c:キャリアf及びサービングセルcにおける最大送信電力
PPRACH,target:基地局装置100におけるターゲット受信電力
PLf,c:キャリアf及びサービングセルcにおける伝搬損失
の設定範囲は、-120dBmから-90dBmまでと規定されていた。
次に、これまでに説明した処理及び動作を実行する基地局装置100及びユーザ装置200の機能構成例を説明する。基地局装置100及びユーザ装置200は上述した実施例を実施する機能を含む。ただし、基地局装置100及びユーザ装置200はそれぞれ、実施例の中の一部の機能のみを備えることとしてもよい。
図4は、基地局装置100の機能構成の一例を示す図である。図4に示されるように、基地局装置100は、送信部110と、受信部120と、設定情報管理部130と、初期アクセス設定部140とを有する。図4に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
図5は、ユーザ装置200の機能構成の一例を示す図である。図5に示されるように、ユーザ装置200は、送信部210と、受信部220と、設定情報管理部230と、初期アクセス制御部240とを有する。図5に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
上述の本発明の実施の形態の説明に用いた機能構成図(図4及び図5)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/又はソフトウェア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手段は特に限定されない。すなわち、各機能ブロックは、物理的及び/又は論理的に複数要素が結合した1つの装置により実現されてもよいし、物理的及び/又は論理的に分離した2つ以上の装置を直接的及び/又は間接的に(例えば、有線及び/又は無線)で接続し、これら複数の装置により実現されてもよい。
以上、説明したように、本発明の実施の形態によれば、基地局装置からプリアンブル受信ターゲット電力に係る情報を取得する受信部と、複数の電力値から構成されるプリアンブル受信ターゲット電力の設定範囲を変更し、前記プリアンブル受信ターゲット電力に係る情報及び前記変更された設定範囲に基づいて、プリアンブル送信電力を決定する制御部と、決定された前記プリアンブル送信電力でプリアンブルを前記基地局装置に送信する送信部とを有するユーザ装置が提供される。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局装置100及びユーザ装置200は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局装置100が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従ってユーザ装置200が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
101 BBU
102 RRH
103 DAS
104 アンテナユニット
110 送信部
120 受信部
130 設定情報管理部
140 初期アクセス設定部
200 ユーザ装置
210 送信部
220 受信部
230 設定情報管理部
240 初期アクセス制御部
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
Claims (6)
- 基地局装置からプリアンブル受信ターゲット電力に係る情報を取得する受信部と、
複数の電力値から構成されるプリアンブル受信ターゲット電力の設定範囲を変更し、前記プリアンブル受信ターゲット電力に係る情報及び前記変更された設定範囲に基づいて、プリアンブル送信電力を決定する制御部と、
決定された前記プリアンブル送信電力でプリアンブルを前記基地局装置に送信する送信部とを有するユーザ装置。 - 前記制御部は、プリアンブルを送信するULの種別に応じて、前記プリアンブル受信ターゲット電力の設定範囲において、電力値のステップ幅が大きくなるように変更する請求項1記載のユーザ装置。
- 前記制御部は、プリアンブルを送信するULの種別に応じて、前記プリアンブル受信ターゲット電力の設定範囲を切り替える請求項1記載のユーザ装置。
- 前記制御部は、プリアンブルを送信するULの種別に応じて、前記プリアンブル受信ターゲット電力の設定範囲に適用するオフセットを切り替える請求項1記載のユーザ装置。
- 前記制御部は、DLとULとのカップリングロスを算出した値に基づいて、前記オフセットを決定する請求項4記載のユーザ装置。
- プリアンブル受信ターゲット電力に係る情報をユーザ装置に通知する送信部と、
複数の電力値から構成されるプリアンブル受信ターゲット電力の設定範囲を変更する通知を前記ユーザ装置に送信する通知部と、
前記プリアンブル受信ターゲット電力に係る情報及び前記設定範囲を変更する通知に基づいて前記ユーザ装置が決定したプリアンブル送信電力で送信されたプリアンブルを受信する受信部とを有する基地局装置。
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PCT/JP2018/014640 WO2019193729A1 (ja) | 2018-04-05 | 2018-04-05 | ユーザ装置及び基地局装置 |
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