WO2019065761A1 - 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
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- WO2019065761A1 WO2019065761A1 PCT/JP2018/035742 JP2018035742W WO2019065761A1 WO 2019065761 A1 WO2019065761 A1 WO 2019065761A1 JP 2018035742 W JP2018035742 W JP 2018035742W WO 2019065761 A1 WO2019065761 A1 WO 2019065761A1
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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
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
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- H—ELECTRICITY
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
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- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
Definitions
- the present invention relates to a user apparatus and a base station apparatus in a wireless communication system.
- NR New Radio
- a UE category is defined as information indicating the Baseband capability of the UE (User Entity). It is defined that the UE notifies both the RF capability (radio capability) and the UE category to the network (for example, Non-Patent Document 1).
- the RF capability includes, for example, information indicating band combination (band combination information) supported by the UE, information indicating the number of Multiple-Input and Multiple-Output (MIMO) layers, and the like (for example, Non-Patent Document 2).
- UE capability notification in consideration of the signaling overhead needs to be appropriately performed. Also, the base station apparatus needs to accurately identify the capability of the user apparatus to execute efficient communication.
- the present invention has been made in view of the above-mentioned points, and it is an object of the present invention to accurately specify the capability of a user apparatus and execute efficient communication in a wireless communication system.
- a control unit that communicates with a base station apparatus and calculates a buffer size based on the wireless capability parameter of the user apparatus, and transmits a capability notification including the wireless capability parameter to the base station apparatus
- a user apparatus comprising: a transmitting unit; and a receiving unit for receiving a signal transmitted from the base station apparatus using a buffer having the calculated buffer size.
- a base station apparatus in a wireless communication system, can accurately identify the capability of a user apparatus to perform efficient communication.
- the existing technology is used as appropriate.
- the existing technology is, for example, the existing LTE, but is not limited to the existing LTE.
- LTE LTE
- LTE-Advanced LTE-Advanced or later (e.g., NR) unless otherwise specified.
- SS Synchronization Signal
- PSS Primary SS
- SSS Secondary SS
- PBCH Physical broadcast channel
- PRACH Physical RACH
- PDCCH Physical Downlink Conrol Channel
- PDSCH Physical Downlink Shared Channel
- FIG. 1 is a diagram showing an example of a configuration of a wireless communication system according to an embodiment of the present invention.
- the wireless communication system in the embodiment of the present invention includes base station apparatus 100 and user apparatus 200 as shown in FIG. Although one base station apparatus 100 and one user apparatus 200 are shown in FIG. 1, this is an example, and may be plural.
- the base station apparatus 100 is a communication apparatus that provides one or more cells and performs wireless communication with the user apparatus 200. As shown in FIG. 1, the base station apparatus 100 transmits broadcast information, control information or data to the user apparatus 200. Broadcast information is transmitted via NR-PBCH and NR-PDSCH, control information is transmitted via NR-PDCCH and NR-PDSCH, and data is transmitted via NR-PDSCH. Further, it is possible for both the base station apparatus 100 and the user apparatus 200 to perform beamforming to transmit and receive signals.
- the user device 200 is a communication device provided with a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, a communication module for M2M (Machine-to-Machine), etc. Use various communication services provided by the system. As shown in FIG. 1, the user apparatus 200 transmits a capability notification in the uplink to the base station apparatus 100. For example, uplink transmission is performed via NR-PUCCH (Physical uplink control channel) or NR-PUSCH (Physical uplink shared channel), and control information is transmitted in NR-PUCCH, and data and control information are transmitted in NR-PUSCH. Ru.
- NR-PUCCH Physical uplink control channel
- NR-PUSCH Physical uplink shared channel
- the duplex method may be TDD (Time Division Duplex) method, FDD (Frequency Division Duplex) method, or any other method (for example, Flexible Duplex etc.) May be.
- transmitting a signal using a transmission beam may be transmitting a signal multiplied by a precoding vector (precoded by a precoding vector).
- receiving a signal using a receive beam may be to multiply the received signal by a predetermined weight vector.
- transmitting a signal using a transmit beam may be referred to as transmitting a signal at a particular antenna port.
- receiving a signal using a receive beam may be referred to as receiving a signal at a particular antenna port.
- the antenna port refers to a logical antenna port or a physical antenna port defined in the 3GPP standard. The method of forming the transmit beam and the receive beam is not limited to the method described above.
- a method of changing the angle of each antenna may be used, or a method combining the method of using precoding vector and the method of changing the antenna angle
- different antenna panels may be switched and used, a method of combining and using a plurality of antenna panels may be used, or other methods may be used.
- a plurality of different transmit 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.
- FIG. 2 is a diagram illustrating an example (1) of a UE category in LTE.
- the maximum transmission / reception bit number per TTI Transmission Time Interval
- the maximum soft buffer size and the maximum MIMO layer number are defined as parameters defined for each UE category in the downlink physical layer.
- the maximum number of transmission / reception bits per TTI is 301504, and the maximum number of transmission / reception bits per TTI corresponding to one transport block is 4-layer 64 QAM (Quadrature Amplitude Modulation).
- the maximum number of transmission / reception bits per TTI is 301504, and the maximum number of transmission / reception bits per TTI corresponding to one transport block is 4-layer 64 QAM (Quadrature Amplitude Modulation).
- the maximum soft buffer size is 3554144
- the maximum number of MIMO layers is two or four.
- the maximum number of transmission / reception bits per TTI is 603008, the maximum number of transmission / reception bits per TTI corresponding to one transport block is 149776 in the case of four layers 64 QAM, and four layers 256 QAM 195816, 75376 for two-layer 64 QAM, 97896 for two-layer 256 QAM, the maximum soft buffer size is 7308 288, and the maximum number of MIMO layers is two or four.
- Other UE categories are similarly defined.
- FIG. 3 is a diagram illustrating an example (2) of a UE category in LTE.
- the maximum number of transmission / reception bits per TTI and whether to support 64 QAM are defined.
- the maximum number of transmit / receive bits per TTI is 51024
- the maximum number of transmit / receive bits per TTI corresponding to one transport block is 51024
- 64 QAM is not supported.
- the maximum number of transmit / receive bits per TTI is 1497760
- the maximum number of transmit / receive bits per TTI corresponding to one transport block is 149776
- 64 QAM is supported.
- Other UE categories are similarly defined.
- FIG. 4 is a diagram illustrating an example (3) of a UE category in LTE.
- total layer 2 buffer size and buffer size in case of supporting a separated bearer are defined for each UE category.
- the total Layer 2 buffer size is 150000
- the buffer size in the case of supporting a separated bearer is 230000.
- the total layer 2 buffer size is 5200000
- the buffer size for supporting a separated bearer is 7600000.
- Other UE categories are similarly defined.
- FIG. 5 is a sequence diagram showing an example of UE capability notification in the embodiment of the present invention.
- the user apparatus 200 transmits a radio capability notification of the UE to the base station apparatus 100.
- the base station apparatus 100 appropriately sets a radio parameter, scheduling, and the like based on the received radio capability notification of the UE, and performs normal communication (S12).
- notification of the UE category can be omitted on the assumption that the user apparatus 200 supports baseband capability according to radio capability, that is, RF capability, that is, BB capability.
- the user device 200 may notify the UE category to the base station device 100 only when the dual connectivity (DC) is not used. Good. Exceeding the wireless capability above the baseband capability indicates, for example, that the maximum computational throughput is higher.
- the value of the soft buffer size or the total layer 2 buffer size defined in association with the conventional UE category is not explicitly notified from the user apparatus 200 to the base station apparatus 100.
- the network node side including the station apparatus 100 there arises a problem that it is not possible to perform rate matching or scheduling in consideration of the buffer availability of the user apparatus 200.
- the soft buffer size or total layer 2 buffer size of the user apparatus 200 is defined as follows.
- the user apparatus 200 calculates the size of the buffer to be secured.
- the buffer size secured by the user apparatus 200 is implicitly based on the radio capacity of the UE acquired by the base station apparatus 100 by the radio capacity notification of the UE shown in step S11 of FIG. Or calculate explicitly.
- the soft buffer size of the user device 200 is calculated as follows.
- Soft buffer size number of receivable bits x number of HARQ (Automatic repeat-request) (HARQ) processes x number of CCs (component carrier) x number of MIMO layers
- number of receivable bits is also an instantaneous value per unit time It may be a value based on TDD config or a value in consideration of UL simultaneous transmission capability.
- TDD config is, for example, an arrangement configuration in a time domain of symbols used for uplink or downlink in a radio frame.
- the soft buffer size may be calculated from HARQ RTT (Round-Trip Time), or when the user apparatus 200 supports multiple HARQ processes or RTTs, the multiple HARQ processes.
- the soft buffer size may be calculated based on the minimum, maximum or average value of the process or RTT.
- the “number of CCs” may be the maximum number of band combinations supported by the user device 200.
- the number of MIMO layers may be the maximum number of band combinations supported by the user apparatus 200.
- some or all of the above parameters may be explicitly notified to the user apparatus 200 from the network, that is, the base station apparatus 100, by broadcast information or individual signaling. Also, for example, the base station apparatus 100 in NR may be notified implicitly based on the release version to which the gNB which is the base conforms.
- the total layer 2 buffer size of the user apparatus 200 is calculated as follows.
- Total layer 2 buffer size number of receivable bits x RTT + number of transmittable bits x RTT
- the “number of receivable bits” may be an instantaneous value per unit time, a value based on TDD config, or a value in consideration of the UL simultaneous transmission capability, as in the calculation of the soft buffer size.
- the RTT may be a value to which RLC (Radio Link Control) RTT, scheduling delay, and delay in the network, that is, a delay in the X2 interface, and the like are added.
- RLC Radio Link Control
- part or all of the above parameters may be explicitly notified to the user apparatus 200 from the network, that is, the base station apparatus 100 by broadcast information or individual signaling.
- the base station apparatus 100 in NR may be notified implicitly based on the release version to which the gNB which is the base conforms.
- FIG. 6 is a sequence diagram showing an example (1) in which the UE buffer size is changed in the embodiment of the present invention.
- the conventional soft buffer or total layer 2 buffer has been secured independently of the other buffers of the user device 200.
- the area reserved for the soft buffer or the total layer 2 buffer is shared with functional units in other user apparatuses 200, for example, functional units other than the wireless functional unit.
- the user apparatus 200 when a change such as a size occurs in a buffer that can be used for wireless use, the user apparatus 200 notifies the change to the network side, that is, the base station apparatus 100.
- the notification including information indicating the change of the buffer may be transmitted from the user apparatus 200 to the base station apparatus 100 via UEAssistanceInformation.
- the base station apparatus 100 Based on the notified change of the buffer, the base station apparatus 100 adjusts the wireless parameter or the scheduling, etc., and normal communication is performed (S23).
- the user apparatus 200 receives the UE Capability Enquiry from the base station apparatus 100 when notifying the network side, ie, the base station apparatus 100 of the change (S24). It may be notified implicitly by the information included in the response UECapabilityInformation (S25). That is, only when the network, ie, the base station apparatus 100 requests in step S24, the user apparatus 200 can notify of buffer change in step S25.
- the information included in the UE Capability Information may be, for example, a combination of bands or other wireless parameters.
- the base station apparatus 100 adjusts radio parameters or scheduling, etc., and normal communication is performed (S26).
- FIG. 7 is a sequence diagram showing an example (2) in which the UE buffer size is changed in the embodiment of the present invention.
- the notification that explicitly or implicitly specifies the buffer size of the UE is performed as in FIG. 5 or FIG.
- step S31 the user apparatus 200 transmits, to the base station apparatus 100, an explicit or implicit notification regarding buffer size change of the UE.
- the base station apparatus 100 may reject, or reject, the notification related to the buffer size change of the UE.
- the user apparatus 200 secures the wireless buffer before the buffer size change. Therefore, normal communication is performed without changing the buffer size of the user apparatus 200 (S33).
- the base station apparatus 100 may transmit a notification that explicitly or implicitly specifies the buffer size of the UE.
- the user apparatus 200 secures the specified buffer size based on the notification that explicitly or implicitly specifies the buffer size of the UE, and normal communication is performed (S35).
- the base station apparatus 100 may designate the user apparatus 200 with a frequency at which the buffer size is changed.
- the base station apparatus 100 may specify the frequency at which the buffer size is changed to the user apparatus 200 by explicitly notifying the user apparatus 200 of the frequency itself, for example, once a minute.
- a "suppress timer” may be introduced to suppress the change of the buffer size.
- the user device 200 starts the suppression timer when notifying of the buffer size change and the buffer size change. While the timer is activated, notification regarding buffer size change and buffer size change can not be executed. When the timer has expired, notification regarding buffer size change and buffer size change can be performed.
- the said suppression timer may be started or restarted at the time of UE capability information transmission.
- the base station apparatus 100 or the user apparatus 200 can calculate and specify the required buffer size according to the radio capability parameter of the UE. Therefore, the base station apparatus 100 can specify the buffer size of the user apparatus 200 without receiving the notification of the UE category from the user apparatus 200, and adjust the rate matching and scheduling based on the buffer size.
- the base station apparatus 100 can also specify the buffer size by explicitly or implicitly notifying the user apparatus 200 of the required buffer size.
- the base station apparatus 100 or the user apparatus 200 implicitly calculates the buffer size based on the radio capacity parameter of the UE, it is not necessary to notify the buffer size, so that it is possible to reduce the signaling.
- the network side that is, the base station apparatus 100 performs rate matching or a user It is difficult to perform scheduling according to the buffer availability of the device 200.
- the base station apparatus 100 can calculate and specify the required buffer size based on the radio capability parameter of the UE according to the above-described embodiment, the network side, ie, the base station apparatus 100 can perform rate matching or user equipment. Scheduling can be performed according to the 200 buffer availability conditions.
- the base station apparatus can accurately identify the capability of the user apparatus and execute efficient communication.
- Each of the base station apparatus 100 and the user apparatus 200 includes at least a function of implementing the embodiment. However, each of the base station apparatus 100 and the user apparatus 200 may have only some of the functions in the embodiments.
- FIG. 8 is a diagram showing an example of a functional configuration of the base station apparatus 100.
- the base station apparatus 100 includes a transmission unit 110, a reception unit 120, a setting information management unit 130, and a buffer management unit 140.
- the functional configuration shown in FIG. 8 is merely an example. As long as the operation according to the embodiment of the present invention can be performed, the names of the function divisions and the function parts may be arbitrary.
- the transmission unit 110 includes a function of generating a signal to be transmitted to the user device 200 and wirelessly transmitting the signal.
- the receiving unit 120 includes a function of receiving various signals transmitted from the user apparatus 200 and acquiring, for example, higher layer information from the received signals.
- the transmission unit 110 has a function of transmitting, to the user apparatus 200, NR-PSS, NR-SSS, NR-PBCH, NR-PDCCH, NR-PDSCH or the like. Also, the transmission unit 110 transmits broadcast information, control information, or data to the user device 200.
- the setting information management unit 130 stores setting information set in advance and various setting information to be transmitted to the user device 200.
- the content of the setting information is, for example, notification information or control information.
- the buffer management unit 140 specifies various buffer sizes of the user device 200, and executes scheduling according to the buffer size.
- FIG. 9 is a diagram showing an example of a functional configuration of the user apparatus 200.
- the user apparatus 200 includes a transmission unit 210, a reception unit 220, a setting information management unit 230, and a buffer control unit 240.
- the functional configuration shown in FIG. 9 is merely an example. As long as the operation according to the embodiment of the present invention can be performed, the names of the function divisions and the function parts may be arbitrary.
- the transmission unit 210 creates a transmission signal from transmission data, and wirelessly transmits the transmission signal.
- the receiving unit 220 wirelessly receives various signals, and acquires higher layer signals from the received physical layer signals.
- the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, NR-PDCCH, NR-PDSCH or the like transmitted from the base station apparatus 100.
- the transmitting unit 210 transmits an uplink signal to the base station apparatus 100, and the receiving unit 120 receives broadcast information, control information, data, and the like from the base station apparatus 100.
- the setting information management unit 230 stores various setting information received from the base station apparatus 100 by the receiving unit 220.
- the setting information management unit 230 also stores setting information set in advance.
- the content of the setting information is, for example, various buffer size information of the user device 200 or the like.
- the buffer control unit 240 autonomously controls various buffer sizes in the user apparatus 200 or in response to a request from the base station apparatus 100, as described in the embodiment. Note that a functional unit related to the reception of control signals and the like in the buffer control unit 240 may be included in the receiving unit 220.
- each functional block may be realized by one device physically and / or logically connected to a plurality of elements, or directly and two or more physically and / or logically separated devices. And / or indirectly (for example, wired and / or wirelessly) connected, and may be realized by the plurality of devices.
- both the base station apparatus 100 and the user apparatus 200 in the embodiment of the present invention may function as a computer that performs the process according to the embodiment of the present invention.
- FIG. 10 is a diagram showing an example of a hardware configuration of a wireless communication apparatus which is the base station apparatus 100 or the user apparatus 200 according to the embodiment of the present invention.
- the above-described base station apparatus 100 and user apparatus 200 physically are each a computer apparatus including a processor 1001, a storage apparatus 1002, an auxiliary storage apparatus 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007 and the like. It may be configured.
- the term "device” can be read as a circuit, a device, a unit, or the like.
- the hardware configuration of the base station apparatus 100 and the user apparatus 200 may be configured to include one or more of the devices indicated by 1001 to 1006 shown in the figure, or may be configured without including some devices. It may be done.
- Each function in base station apparatus 100 and user apparatus 200 causes processor 1001 to perform an operation by reading predetermined software (program) on hardware such as processor 1001, storage apparatus 1002, etc. 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 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
- CPU Central Processing Unit
- the processor 1001 reads a program (program code), a software module or data from the auxiliary storage device 1003 and / or the communication device 1004 to the storage device 1002, and executes various processing according to these.
- a program a 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 buffer management unit 140 of the base station apparatus 100 shown in FIG. 8 are stored in the storage device 1002 and realized by a control program operated by the processor 1001. It is also good.
- the various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001.
- the processor 1001 may be implemented by one or more chips.
- the program may be transmitted from the network via a telecommunication line.
- the storage device 1002 is a computer readable recording medium, and is, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be configured.
- the storage device 1002 may be called a register, a cache, a main memory (main storage device), or the like.
- the storage device 1002 can store a program (program code), a software module, and the like that can be executed to perform the process according to an embodiment of the present invention.
- the auxiliary storage device 1003 is a computer-readable recording medium, and for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray disc) -Ray (R) disk), smart card, flash memory (for example, card, stick, key drive), floppy (R) disk, magnetic strip and the like.
- the auxiliary storage device 1003 may be called 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 appropriate media.
- the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
- the transmission unit 110 and the reception unit 120 of the base station apparatus 100 may be realized by the communication apparatus 1004.
- the transmission unit 210 and the reception unit 220 of the user apparatus 200 may be realized by the communication apparatus 1004.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
- the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- 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 by a single bus or may be configured by different buses among the devices.
- the base station apparatus 100 and the user apparatus 200 respectively include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), and the like.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- Hardware, and part or all of each functional block may be realized by the hardware.
- processor 1001 may be implemented in at least one of these hardware.
- the control unit calculates a buffer size based on a wireless capability parameter of the user apparatus, which is a user apparatus that communicates with a base station apparatus.
- a transmitter configured to transmit a capability notification including the wireless capability parameter to the base station device; and a receiver configured to receive a signal transmitted from the base station device using a buffer having the calculated buffer size.
- a user device is provided.
- the base station apparatus 100 or the user apparatus 200 calculates and specifies the required buffer size according to the wireless capability parameter of the UE, and the base station apparatus accurately determines the capability of the user apparatus in the wireless communication system. In particular, efficient communication can be performed.
- the radio parameters may include some or all of the number of bits that the user apparatus can receive per predetermined time, the number of HARQ processes, the number of component carriers, or the number of MIMO layers.
- the base station apparatus 100 or the user apparatus 200 implicitly calculates the buffer size based on the radio capacity parameter of the UE, thereby eliminating the need to notify the buffer size, which makes it possible to reduce signaling. .
- the number of bits that can be received per predetermined time is calculated based on the setting of a radio frame related to time division duplexing or the simultaneous transmission capability of uplink and downlink, and the number of HARQ processes is a round trip of HARQ
- the number of component carriers and the number of MIMO layers calculated based on time may be the maximum number of band combinations supported by the user apparatus.
- the base station apparatus 100 or the user apparatus 200 implicitly calculates the buffer size based on the radio capacity parameter of the UE, thereby eliminating the need to notify the buffer size, which makes it possible to reduce signaling. .
- the control unit uses the wireless capability parameter of the user device. Based on the above, the buffer size may be calculated. With this configuration, synchronization can be eliminated between the base station apparatuses 100 performing DC, and therefore, it is possible to reduce signaling.
- a buffer having the designated buffer size may be used to receive a signal transmitted from the base station apparatus.
- the buffer size can be updated at the timing designated by the base station apparatus 100, and the buffer size designated by the base station apparatus 100 can be applied to the user apparatus 200.
- the buffer size of the user device 200 can be easily managed.
- a base station apparatus that communicates with a user apparatus, the receiving section receiving, from the user apparatus, a capability notification including a wireless capability parameter of the user apparatus;
- a base station apparatus comprising: a management unit that calculates a buffer size based on a parameter; and a transmission unit that generates a signal to be transmitted to the user apparatus based on the calculated buffer size.
- the base station apparatus 100 or the user apparatus 200 calculates and specifies the required buffer size according to the wireless capability parameter of the UE, and the base station apparatus accurately determines the capability of the user apparatus in the wireless communication system. In particular, efficient communication can be performed.
- the operations of multiple functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by multiple components.
- the order of processing may be changed as long as there is no contradiction.
- the base station apparatus 100 and the user apparatus 200 are described using a functional block diagram for the convenience of the processing description, such an apparatus may be realized in hardware, software or a combination thereof.
- the software operated by the processor of the base station apparatus 100 according to the embodiment of the present invention and the software operated by the processor of the user apparatus 200 according to the embodiment of the present invention are random access memory (RAM), flash memory, read It may be stored in a dedicated memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- RAM random access memory
- ROM dedicated memory
- EPROM EPROM
- EEPROM electrically erasable programmable read-only memory
- register hard disk
- removable disk CD-ROM
- database database
- server server or any other suitable storage medium.
- notification of information is not limited to the aspect / embodiment described herein, and may be performed by other methods.
- notification of information may be physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block), other signals, or a combination thereof.
- RRC signaling may be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- Each aspect / embodiment described in the present specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band),
- the present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.
- the specific operation performed by the base station apparatus 100 in this specification may also be performed by its upper node.
- various operations performed for communication with the user apparatus 200 may be performed other than the base station apparatus 100 and / or the base station apparatus 100. It will be appreciated that it may be performed by other network nodes (e.g., but not limited to, MME or S-GW etc).
- MME Mobility Management Entity
- S-GW Serving GPRS Support Node
- the user equipment 200 may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, by those skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.
- Base station apparatus 100 may also be referred to by those skilled in the art with NB (Node B), eNB (enhanced Node B), gNB, Base Station, or some other suitable term.
- NB Node B
- eNB enhanced Node B
- gNB Base Station
- determining may encompass a wide variety of operations.
- “Judgment”, “decision” are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision” and the like.
- “determination” and “determination” are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (Accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”.
- judgement and “decision” are to be regarded as “judgement” and “decision” that they have resolved (resolving), selecting (selecting), choosing (choosing), establishing (establishing) May be included. That is, “judgment” "decision” may include considering that some action is “judged” "decision”.
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- the buffer control unit 240 is an example of a control unit.
- the buffer management unit 140 is an example of a management unit.
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Abstract
Description
以下、実施例について説明する。
ユーザ装置200においては、バッファの確保すべきサイズを算出する。
基地局装置100においては、ユーザ装置200が確保しているバッファサイズを、図5のステップS11に示されるUEの無線能力通知によって基地局装置100が取得するUEの無線能力に基づいて、暗黙的又は明示的に算出する。
ソフトバッファサイズ=受信可能ビット数×HARQ(Hybrid ARQ(Automatic repeat-request))プロセス数×CC(Component Carrier)数×MIMOレイヤ数
なお、「受信可能ビット数」は、単位時間当たりの瞬時値でもよいし、TDD configに基づく値でもよいし、UL同時送信能力を考慮した値でもよい。TDD configは、例えば、無線フレームにおける上りリンク又は下りリンクに使用されるシンボルの時間領域での配置構成である。
総レイヤ2バッファサイズ=受信可能ビット数×RTT+送信可能ビット数×RTT
なお、「受信可能ビット数」は、ソフトバッファサイズの算出時と同様に、単位時間当たりの瞬時値でもよいし、TDD configに基づく値でもよいし、UL同時送信能力を考慮した値でもよい。
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はそれぞれ、少なくとも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。
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8及び図9)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、基地局装置と通信を行うユーザ装置であって、前記ユーザ装置の無線能力パラメータに基づいて、バッファサイズを算出する制御部と、前記無線能力パラメータを含む能力通知を前記基地局装置に送信する送信部と、前記算出されたバッファサイズを有するバッファを使用して、前記基地局装置から送信される信号を受信する受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。
200 ユーザ装置
110 送信部
120 受信部
130 設定情報管理部
140 バッファ管理部
200 ユーザ装置
210 送信部
220 受信部
230 設定情報管理部
240 バッファ制御部
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)
- 基地局装置と通信を行うユーザ装置であって、
前記ユーザ装置の無線能力パラメータに基づいて、バッファサイズを算出する制御部と、
前記無線能力パラメータを含む能力通知を前記基地局装置に送信する送信部と、
前記算出されたバッファサイズを有するバッファを使用して、前記基地局装置から送信される信号を受信する受信部とを有するユーザ装置。 - 前記無線能力パラメータは、前記ユーザ装置が所定の時間あたりに受信可能であるビット数、HARQプロセス数、コンポーネントキャリア数又はMIMOレイヤ数の一部又は全部を含む請求項1記載のユーザ装置。
- 前記所定の時間あたりに受信可能であるビット数は、時分割複信に係る無線フレームの設定又は上りリンク及び下りリンクの同時送信能力に基づいて算出されるか、又は、
前記HARQプロセス数は、HARQのラウンドトリップタイムに基づいて算出されるか、又は、
前記コンポーネントキャリア数及びMIMOレイヤ数は、前記ユーザ装置がサポートするバンド組み合わせにおける最大数である請求項2記載のユーザ装置。 - 前記ユーザ装置のベースバンド能力より無線能力が上回り、かつ、前記ユーザ装置がデュアルコネクティビィティを用いて前記基地局装置と通信している場合、前記制御部は、前記ユーザ装置の無線能力パラメータに基づいて、バッファサイズを算出する請求項1記載のユーザ装置。
- 前記基地局装置から能力通知の要求を前記受信部が受信した場合、明示的にバッファサイズの変更を前記基地局装置に送信し、又は、
前記基地局装置から明示的にバッファサイズを指定する通知を前記受信部が受信した場合、前記指定されたバッファサイズを有するバッファを使用して、前記基地局装置から送信される信号を受信する請求項1記載のユーザ装置。 - ユーザ装置と通信を行う基地局装置であって、
前記ユーザ装置の無線能力パラメータを含む能力通知を前記ユーザ装置から受信する受信部と、
前記無線能力パラメータに基づいて、バッファサイズを算出する管理部と、
前記算出されたバッファサイズに基づいて、前記ユーザ装置に送信する信号を生成する送信部とを有する基地局装置。
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