WO2019138559A1 - ユーザ装置、及び上り送信タイミング調整方法 - Google Patents
ユーザ装置、及び上り送信タイミング調整方法 Download PDFInfo
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- WO2019138559A1 WO2019138559A1 PCT/JP2018/000724 JP2018000724W WO2019138559A1 WO 2019138559 A1 WO2019138559 A1 WO 2019138559A1 JP 2018000724 W JP2018000724 W JP 2018000724W WO 2019138559 A1 WO2019138559 A1 WO 2019138559A1
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- user apparatus
- base station
- band
- timing
- serving cell
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to a user equipment in a wireless communication system.
- LTE Long Term Evolution
- 3GPP in order to realize further increase in system capacity from LTE, further increase in data transmission speed, and further reduction in delay in a wireless section, etc., examination and specification of a wireless communication system called 5G Is advancing.
- 5G in order to satisfy the requirement of reducing the delay of the wireless section to 1 ms or less while achieving a throughput of 10 Gbps or more, various techniques are being studied.
- a radio access technology that supports 5G is called NR (New Radio).
- uplink transmission timing control (referred to as TA (Timing Advance control)) is performed such that the difference in reception timing of uplink signals received from a plurality of user apparatuses in a base station falls within a predetermined time.
- uplink transmission timing control similar to LTE is performed.
- whether to apply an offset value to be added to the value of TA has to be determined according to the duplex mode, and control in the user apparatus and base station is complicated. There is a problem of becoming In particular, in NR where high speed operation is required, it is not preferable that control becomes complicated.
- the present invention has been made in view of the above, and it is an object of the present invention to provide a technology capable of performing uplink transmission timing control without being aware of a duplex system in a wireless communication system.
- the user equipment in a wireless communication system comprising a base station and a user equipment, A signal transmission unit that transmits an uplink signal to the base station; A signal receiving unit for receiving a downlink signal from the base station; A timing adjustment unit that performs timing control to shift the transmission timing of the uplink signal transmitted from the signal transmission unit forward with reference to the reception timing of the downlink signal received by the signal reception unit;
- the timing adjustment unit is provided with a user apparatus that performs the timing control in the serving cell using an offset value that does not depend on a duplexing scheme of the serving cell.
- a technology that enables uplink transmission timing control to be performed in a wireless communication system without being aware of a duplex system.
- TAG pattern of CA
- the wireless communication system according to the present embodiment is assumed to support at least the NR communication method.
- the wireless communication system according to the present embodiment operates, for example, in order to perform an operation not defined in the specification of NR, the technology defined in the existing LTE can be appropriately used.
- FIG. 1 is a diagram showing an example of configuration of a wireless communication system according to the present embodiment.
- the radio communication system according to the present embodiment has a base station 10 forming a cell and a user apparatus UE.
- the radio communication system according to the present embodiment in general, a large number of user apparatuses UE exist in addition to one user apparatus UE shown in FIG. FIG. 1 shows one user apparatus UE as an example.
- the base station 10 and the user apparatus UE both have the function of NR.
- both the base station 10 and the user apparatus UE may be provided with the function of LTE in addition to the function of NR, or may be an apparatus including only the function of NR.
- the user apparatus of NR may be described as NR-UE
- the user apparatus of LTE may be described as LTE-UE.
- the user apparatus UE of this embodiment is an example of an NR-UE.
- the radio frame configuration (frame, slot, subframe, etc.) used in the present embodiment is, for example, the NR radio frame configuration disclosed in Non-Patent Document 1. However, it is not necessarily limited to this.
- the signal waveform used in the radio communication system according to the present embodiment may be OFDMA in either uplink (UL) or downlink (DL), or may be SC-FDMA, but It is assumed to use SC-FDMA for UL and OFDMA for DL.
- the base station 10 collectively performs FFT on uplink signals from different user apparatuses UE in a cell to demodulate the signals.
- the signal propagation delay (radio characteristics) of each user apparatus UE is different, when each user apparatus UE in the cell transmits an uplink signal according to the reception timing of the downlink signal from base station 10, base station 10 The uplink signal of each user apparatus UE is received at a different timing, and the base station 10 can not perform FFT at a desired timing. Therefore, the base station 10 adjusts the transmission timing of the uplink signal of each user apparatus UE, and performs control so that the deviation of the reception timing in the base station 10 falls within a predetermined time. This is called TA control.
- the base station 10 instructs each user apparatus UE to measure the difference between the desired uplink signal reception timing and the actual uplink signal reception timing, and to shift the uplink signal timing forward by the difference. It is carried out.
- the uplink transmission timing adjustment instruction (referred to as a TA command) from the base station 10 can be notified by a random access procedure or the like.
- FIG. 2 (excerpt from Non-Patent Document 1) shows an example of TA control, in which the ith UL frame precedes the ith DL frame for the time of (N TA + N TA offset ) Tc. It is shown to be offset.
- NTA is a value of the uplink transmission timing adjustment instruction notified from the base station 10
- NTA offset is a predetermined offset value.
- Tc is a predetermined value.
- CCs component carriers set in the user apparatus UE are substantially equal in radio characteristics. It is decided to group by what becomes and perform uplink transmission timing adjustment control for each CC group (TAG: Timing Advance Group). TAG is a group of cells using the same uplink transmission timing.
- duplex modes two of the frequency division duplex (FDD) method and the time division duplex (TDD) method are used as duplex modes.
- One duplex mode can be used.
- uplink (UL) communication and downlink (DL) communication are performed in different frequency bands
- UL communication and DL communication use the same frequency band
- UL communication and DL communication are performed.
- Communication is separated in time.
- duplex mode is defined for each band, and the user apparatus UE performs TDD or FDD operation according to the band of the cell (serving cell) in which the user apparatus is located.
- N TA offset to be applied in TA control differs depending on the duplex mode.
- the reason for adding the value of N TA offset in the case of TDD is because the time for switching between UL communication and DL communication is considered.
- TAoffset is approximately 20 ⁇ s for the value of N TA offset of TDD even in LTE.
- the TAoffset in LTE is shown in FIG.
- the value of NTA offset of TDD is defined so that TAoffset is approximately 13 ⁇ s in FR1 (frequency range 1), and TAoffset is approximately 7 ⁇ s in FR2.
- FR1 frequency range 1
- TAoffset is approximately 7 ⁇ s in FR2.
- FIG. 5 a summary of this is provided.
- "Yes" of LTE-NR coexistence shows the band which LTE-UE and NR-UE can coexist, and, in this case, for example, both LTE-UE and NR-UE have TA offset of 20 ⁇ s. It is possible to do.
- CA and duplex mode it is possible to perform CA using CCs of different duplex modes.
- CA using CC of different duplex mode is described as TDD-FDD CA.
- the TA control on the FDD cell for the UE under the base station where the FDD cell and the TDD cell co-locate is as follows.
- time to compensate for propagation delay from base station + time for N TA offset in TDD is set as N TA for each UE.
- FDD-TDD CA UE (TDD PCell ) If only exists: For each UE, "time to compensate the propagation delay amount from the base station" is set as N TA, each UE, timed to a TDD side In the FDD SCell, the UL transmission timing control, which was preceded by the addition of the N TA offset time in TDD, is performed.
- FDD-TDD CA UE (secondary TAG ) If only exists: For each UE, "time to compensate the propagation delay amount from the base station" is set as N TA, time N TA offset in each UE TDD Implemented UL transmission timing control for FDD SCell, which was preceded by adding minutes.
- N TA time of N TA offset in time + TDD to compensate for the propagation delay amount from the base station
- the control of the base station / UE is complicated.
- the TA value does not directly correspond to the distance from the base station (propagation delay time)
- applications such as base station-terminal distance estimation can be performed using the TA value. It can be complicated.
- NTA offset which does not depend on duplex mode is specified, and user apparatus UE performs UL transmission timing control using the specified N TA offset .
- the value of the defined N TA offset may be fixedly held by the user apparatus UE, or may be preset in the user apparatus UE (eg, a value is acquired from the server at the time of UE purchase, etc.) It may be configured by the upper layer signaling from the base station 10 to the user apparatus UE.
- Example 1 More specific examples will be described below as Example 1 and Example 2.
- Example 1 A basic operation example in the first embodiment will be described with reference to FIG. The operation example shown in FIG. 7 is also applied to the second embodiment.
- the user apparatus UE locates a certain cell provided by the base station 10, and receives a TA command from the base station 10 (S101).
- the TA command is, for example, a TA command included in a random access response received after transmitting a random access preamble.
- the TA command is a value of NTA in UL transmission timing control shown in FIG. 2 or a value corresponding to NTA .
- the TA command received in S101 has a value of N TA .
- the duplex mode of the cell (referred to as a serving cell) in which the user apparatus UE is located is TDD or FDD.
- the user apparatus UE determines UL transmission timing by using a specific N TA offset without depending on the duplex mode of the cell. That is, as shown in FIG. 2, when the user apparatus UE receives the signal of the ith DL frame at a certain timing (here, time T), the user apparatus UE receives the signal of the ith UL frame “T- Transmit at the timing of (N TA + N TA offset ) Tc.
- FIG. 8 is a flowchart showing processing when the user apparatus UE determines an N TA offset to be applied in the serving cell.
- the user apparatus UE detects a band operated in the serving cell.
- the user apparatus UE determines whether the detected band corresponds to FR1 or FR2.
- the base station 10 may provide a plurality of cells, and the base station 10 may set CA (here, UL CA) in the user apparatus UE. Even in that case, basically, the operations shown in FIGS. 7 and 8 are performed for each cell. However, when a plurality of cells related to CA form a TAG, the TA command (N TA ) is notified to the user apparatus UE only in a specific cell, and the user apparatus UE uses the NTA in other cells as well. You may do it.
- CA here, UL CA
- N TA offset may be set to a different value between cells. That is, the UL transmission timing of FR1 and the UL transmission timing of FR2 do not have to match.
- NTA offset 0
- SCell TDD
- the base station 10 sets the "time of N TA offset in time + TDD to compensate for the propagation delay amount from the base station" to the user equipment UE as N TA.
- the base station 10 may operate a band (LTE-NR coexistence band) in which both the LTE-UE and the NR-UE can be located. That is, in the cell of the band, one or more LTE-UEs and one or more NR-UEs may be located.
- the user apparatus UE according to the present embodiment is one of NR-UEs.
- the base station 10 includes information indicating whether the band of the serving cell is the LTE-NR coexistence band, in system information (eg, remaining minimum system information (RMSI)) broadcast in the serving cell.
- system information eg, remaining minimum system information (RMSI)
- the user apparatus UE can determine whether the band of the serving cell is the LTE-NR coexistence band by reading the system information.
- the user apparatus UE grasps a band (band number) by detecting synchronization raster indicating the frequency position of the synchronization signal, and, based on the band number, whether the band is the LTE-NR coexistence band or not You may grasp
- a band band number
- the user apparatus UE knows in advance the correspondence between the synchronization raster and the band number, and whether or not it is the LTE-NR coexistence band for each band number.
- the user apparatus UE receives system information or a synchronization signal from the base station 10.
- the user apparatus UE determines whether the band of the serving cell is the LTE-NR coexistence band based on the system information or the synchronization signal.
- the user apparatus UE transmits a UL signal at the UL transmission timing to which the N TA offset determined in S303 is applied.
- the user apparatus UE may switch the value of the N TA offset according to whether or not the band of the serving cell is an LTE-NR coexistence band of LTE-FDD and NR.
- the band of the serving cell is the LTE-NR coexistence band of LTE-FDD and NR can be grasped from the system information or the synchronization signal.
- the flow in this case is shown in FIG.
- the user apparatus UE receives system information or a synchronization signal from the base station 10.
- the user apparatus UE determines whether the band of the serving cell is the LTE-NR coexistence band of LTE-FDD and NR based on the system information or the synchronization signal.
- the user apparatus UE transmits a UL signal at the UL transmission timing to which the N TA offset determined in S403 is applied.
- the user apparatus UE can control UL transmission timing without being aware of the duplex mode. Also, the base station 10 can control the TA command without being aware of the CA state or the like of the connected user apparatus UE.
- the user apparatus UE and the base station 10 have all the functions described in the present embodiment. However, the user apparatus UE and the base station 10 may be provided with only a part of all the functions described in the present embodiment. For example, the user apparatus UE may have the functions of both the first embodiment and the second embodiment, or may have the function of any of the first embodiment and the second embodiment.
- FIG. 12 is a diagram illustrating an example of a functional configuration of the user apparatus UE.
- the user apparatus UE includes a signal transmission unit 101, a signal reception unit 102, a setting information management unit 103, and a timing adjustment unit 104.
- the functional configuration shown in FIG. 12 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary.
- the signal transmission unit 101 may be referred to as a transmitter, and the signal reception unit 102 may be referred to as a receiver.
- the signal transmission unit 101 creates a transmission from transmission data, and wirelessly transmits the transmission signal.
- the signal reception unit 102 wirelessly receives various signals, and acquires higher layer signals from the received physical layer signals.
- the setting information management unit 103 stores various setting information received from the base station 10 by the signal receiving unit 102 and setting information set in advance. An example of the setting information is the value of N TA offset or the like.
- the timing adjustment unit 104 executes the process related to the uplink transmission timing control described in the present embodiment.
- the signal transmission unit 101 transmits an uplink signal to the base station
- the signal reception unit 102 receives a downlink signal from the base station
- the timing adjustment unit 104 transmits the uplink signal transmitted from the signal transmission unit 101.
- the timing control is performed to shift the timing forward with reference to the reception timing of the downlink signal received by the signal reception unit 102.
- the timing adjustment unit 104 executes the timing control in the serving cell using an offset value that does not depend on the duplexing scheme of the serving cell.
- the frequency range of the band of the serving cell is a first range. In one case, when the timing adjustment unit 104 uses a first value as the offset value and the frequency range of the band of the serving cell is a second range, the timing adjustment unit 104 performs the offset value. Use the second value as.
- the timing adjustment unit 104 determines whether the band of the serving cell is a predetermined band based on system information or a synchronization signal transmitted from the base station, and the band of the serving cell is a predetermined band.
- the offset value to be used may be determined according to whether or not The LTE-NR coexistence band is an example of a predetermined band.
- the predetermined band is, for example, a band in which both a user apparatus compatible with the first radio access technology and a user apparatus compatible with the second radio access technology can be used.
- LTE is an example of a first radio access technology
- NR is an example of a second radio access technology.
- FIG. 13 is a diagram showing an example of a functional configuration of the base station 10.
- the base station 10 includes a signal transmission unit 201, a signal reception unit 202, a setting information management unit 203, and a timing instruction unit 204.
- the functional configuration shown in FIG. 13 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary.
- the signal transmission unit 201 may be referred to as a transmitter, and the signal reception unit 202 may be referred to as a receiver.
- the signal transmission unit 201 includes a function of generating a signal to be transmitted to the user apparatus UE side and wirelessly transmitting the signal.
- the signal receiving unit 202 includes a function of receiving various signals transmitted from the user apparatus UE and acquiring, for example, higher layer information from the received signals.
- the signal transmission unit 201 includes a function of notifying the user apparatus UE whether the band of the serving cell is a predetermined band by system information or a synchronization signal.
- the setting information management unit 203 stores various setting information to be transmitted to the user apparatus UE, various setting information received from the user apparatus UE, and setting information set in advance.
- the timing instruction unit 204 includes a function of generating a TA command and transmitting it via the signal transmission unit 201.
- 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 user apparatus UE and the base station 10 in an embodiment of the present invention may function as a computer that performs the process according to the present embodiment.
- FIG. 14 is a diagram showing an example of the hardware configuration of the user apparatus UE and the base station 10 according to the present embodiment. Even if the above-mentioned user apparatus UE and base station 10 are physically configured as a computer apparatus including processor 1001, memory 1002, storage 1003, communication apparatus 1004, input apparatus 1005, output apparatus 1006, bus 1007, etc. Good.
- the term “device” can be read as a circuit, a device, a unit, or the like.
- the hardware configurations of the user apparatus UE and the base station 10 may be configured to include one or more devices indicated by 1001 to 1006 shown in the figure, or may be configured without including some devices. May be
- Each function in the user apparatus UE and the base station 10 causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001, the memory 1002, and the like, and communication by the communication apparatus 1004; And by controlling the reading and / or writing of data in the storage 1003.
- predetermined software program
- 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 storage 1003 and / or the communication device 1004 to the memory 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 signal transmission unit 101, the signal reception unit 102, the setting information management unit 103, and the timing adjustment unit 104 of the user apparatus UE illustrated in FIG. 12 are stored in the memory 1002 and realized by a control program operated by the processor 1001. It is also good.
- control program stored in the memory 1002 of the signal transmission unit 201, the signal reception unit 202, the setting information management unit 203, and the timing instruction unit 204 of the base station 10 illustrated in FIG. It may be realized by The various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001.
- the processor 1001 may be implemented by one or more chips.
- the program may be transmitted from the network via a telecommunication line.
- the memory 1002 is a computer readable recording medium, and includes, 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 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), a software module, and the like that can be executed to execute the process according to the embodiment of the present invention.
- the storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used.
- the storage 1003 may be called an auxiliary storage device.
- the above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.
- the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
- the signal transmission unit 101 and the signal reception unit 102 of the user device 10 may be realized by the communication device 1004.
- the signal transmission unit 201 and the signal reception unit 202 of the base station 10 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, 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 memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
- each of the user apparatus UE and the base station 10 includes a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- the user apparatus in a wireless communication system including a base station and a user apparatus, the signal transmission unit transmitting an uplink signal to the base station, and the base station A signal reception unit for receiving a downlink signal, and a timing adjustment unit for performing timing control to shift the transmission timing of an uplink signal transmitted from the signal transmission unit forward with reference to the reception timing of the downlink signal received by the signal reception unit
- the timing adjustment unit is provided with a user apparatus that performs the timing control in the serving cell using an offset value that does not depend on a duplexing scheme of the serving cell.
- a technique is provided that enables uplink transmission timing control without being aware of the duplex system.
- the timing adjustment unit uses a first value as the offset value, and the frequency range of the serving cell band is a second range In the above, the timing adjustment unit may use a second value as the offset value. With this configuration, appropriate offset values can be applied in different frequency ranges such as, for example, FR1 and FR2.
- the timing adjustment unit determines whether the band of the serving cell is a predetermined band based on system information or a synchronization signal transmitted from the base station, and determines whether the band of the serving cell is the predetermined band
- the offset value to be used may be determined depending on whether or not it is used. With this configuration, an appropriate offset value can be applied according to the characteristics of the band.
- the predetermined band is, for example, a band in which both a user apparatus compatible with the first radio access technology and a user apparatus compatible with the second radio access technology can be used.
- an appropriate offset value can be applied depending on whether or not the band of the serving cell is the LTE-NR coexistence band.
- 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 user apparatus UE and the base station 10 have been described using functional block diagrams 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 user apparatus UE according to the embodiment of the present invention and the software operated by the processor of the base station 10 according to the embodiment of the present invention are random access memory (RAM), flash memory, read only It may be stored in 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 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 Connection setup (RRC Con ection Setup) message, RRC connection reconfiguration (it may be a RRC Connection Reconfiguration) message.
- 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 supposed to be performed by the base station 10 in this specification may be performed by the upper node in some cases.
- the various operations performed for communication with the user equipment UE may be performed by the base station 10 and / or other than the base station 10. It is clear that it may be done by a network node (for example but not limited to MME or S-GW etc).
- a network node for example but not limited to MME or S-GW etc.
- MME Mobility Management Entity
- the user equipment UE 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 communication device, a mobile subscriber station, an access terminal, a mobile terminal, by a person 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 10 may also be referred to by those skilled in the art with NB (Node B), eNB (enhanced Node B), Base Station, gNB, or some other suitable terminology.
- NB Node B
- eNB enhanced Node B
- Base Station gNB
- 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”, etc.
- “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”.
- 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.”
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Abstract
Description
前記基地局に上り信号を送信する信号送信部と、
前記基地局から下り信号を受信する信号受信部と、
前記信号送信部から送信される上り信号の送信タイミングを、前記信号受信部により受信する下り信号の受信タイミングを基準として前にずらすタイミング制御を行うタイミング調整部と、を備え、
前記タイミング調整部は、サービングセルの複信方式に依存しないオフセット値を使用して、当該サービングセルにおける前記タイミング制御を実行する
ユーザ装置が提供される。
図1は、本実施の形態に係る無線通信システムの構成例を示す図である。図1に示すように、本実施の形態に係る無線通信システムは、セルを形成する基地局10、及びユーザ装置UEを有する。本実施の形態に係る無線通信システムにおいて、一般には、図1に示す1つのユーザ装置UE以外にも多数のユーザ装置UEが存在する。図1では、一例として1つのユーザ装置UEを示している。
本実施の形態では、TA(Timing Advance)制御を対象としていることから、まず、TA(Timing Advance)制御に係る基本的な動作について説明する。
実施例1における基本的な動作例を図7を参照して説明する。なお、図7に示す動作例は実施例2においても適用される。
実施例2では、ユーザ装置UEは、サービングセルのバンドに拠らずに、固定でNTA offset=39936(約20μs)を適用する。
次に、これまでに説明した処理動作を実行するユーザ装置UE及び基地局10の機能構成例を説明する。ユーザ装置UE及び基地局10は、本実施の形態で説明した全ての機能を備えている。ただし、ユーザ装置UE及び基地局10は、本実施の形態で説明した全ての機能のうちの一部のみの機能を備えてもよい。例えば、ユーザ装置UEは、実施例1と実施例2の両方の機能を備えてもよいし、実施例1と実施例2のうちのいずれかの機能を備えてもよい。
図12は、ユーザ装置UEの機能構成の一例を示す図である。図12に示すように、ユーザ装置UEは、信号送信部101と、信号受信部102と、設定情報管理部103と、タイミング調整部104とを有する。図12に示す機能構成は一例に過ぎない。本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。なお、信号送信部101を送信機と称し、信号受信部102を受信機と称してもよい。
また、例えば、前記サービングセルのバンドの周波数範囲が第1の範囲である場合において、前記タイミング調整部104は、前記オフセット値として第1の値を使用し、前記サービングセルのバンドの周波数範囲が第2の範囲である場合において、前記タイミング調整部104は、前記オフセット値として第2の値を使用する。
図13は、基地局10の機能構成の一例を示す図である。図13に示すように、基地局10は、信号送信部201と、信号受信部202と、設定情報管理部203と、タイミング指示部204とを有する。図13に示す機能構成は一例に過ぎない。本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。なお、信号送信部201を送信機と称し、信号受信部202を受信機と称してもよい。
上記実施の形態の説明に用いたブロック図(図12~図13)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、本実施の形態により、基地局とユーザ装置とを備える無線通信システムにおける前記ユーザ装置であって、前記基地局に上り信号を送信する信号送信部と、前記基地局から下り信号を受信する信号受信部と、前記信号送信部から送信される上り信号の送信タイミングを、前記信号受信部により受信する下り信号の受信タイミングを基準として前にずらすタイミング制御を行うタイミング調整部と、を備え、前記タイミング調整部は、サービングセルの複信方式に依存しないオフセット値を使用して、当該サービングセルにおける前記タイミング制御を実行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、ユーザ装置UEと基地局10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ユーザ装置UE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基地局10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。
102 信号受信部
103 設定情報管理部
104 タイミング調整部
201 信号送信部
202 信号受信部
203 設定情報管理部
204 タイミング指示部
1001 プロセッサ
1002 メモリ
1003 ストレージ
1004 通信装置
1005 入力装置
1006 出力装置
Claims (5)
- 基地局とユーザ装置とを備える無線通信システムにおける前記ユーザ装置であって、
前記基地局に上り信号を送信する信号送信部と、
前記基地局から下り信号を受信する信号受信部と、
前記信号送信部から送信される上り信号の送信タイミングを、前記信号受信部により受信する下り信号の受信タイミングを基準として前にずらすタイミング制御を行うタイミング調整部と、を備え、
前記タイミング調整部は、サービングセルの複信方式に依存しないオフセット値を使用して、当該サービングセルにおける前記タイミング制御を実行する
ユーザ装置。 - 前記サービングセルのバンドの周波数範囲が第1の範囲である場合において、前記タイミング調整部は、前記オフセット値として第1の値を使用し、
前記サービングセルのバンドの周波数範囲が第2の範囲である場合において、前記タイミング調整部は、前記オフセット値として第2の値を使用する
請求項1に記載のユーザ装置。 - 前記タイミング調整部は、前記基地局から送信されるシステム情報又は同期信号に基づいて、前記サービングセルのバンドが所定のバンドであるか否かを判断し、前記サービングセルのバンドが所定のバンドであるか否かに応じて、使用する前記オフセット値を決定する
請求項1又は2に記載のユーザ装置。 - 前記所定のバンドは、第1無線アクセス技術に対応したユーザ装置と、第2無線アクセス技術に対応したユーザ装置とがいずれも使用可能なバンドである
請求項3に記載のユーザ装置。 - 基地局とユーザ装置とを備える無線通信システムにおける前記ユーザ装置が実行する上り送信タイミング調整方法であって、
前記ユーザ装置から送信される上り信号の送信タイミングを、前記ユーザ装置により受信する下り信号の受信タイミングを基準として前にずらすタイミング制御を行うタイミング調整ステップを備え、
前記タイミング調整ステップにおいて、前記ユーザ装置は、サービングセルの複信方式に依存しないオフセット値を使用して、当該サービングセルにおける前記タイミング制御を実行する
上り送信タイミング調整方法。
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| JP2019564252A JP7066748B2 (ja) | 2018-01-12 | 2018-01-12 | 端末、基地局、無線通信システム、及び上り送信タイミング調整方法 |
| EP18899594.8A EP3739975A4 (en) | 2018-01-12 | 2018-01-12 | USER DEVICE AND UPLINK TRANSMISSION TIME SETTING PROCEDURES |
| US16/960,424 US11570762B2 (en) | 2018-01-12 | 2018-01-12 | User equipment, and uplink transmission timing adjustment method |
| BR112020013851-7A BR112020013851A2 (pt) | 2018-01-12 | 2018-01-12 | terminal, estação base e método de ajuste de temporização de transmissão de enlace ascendente executado por um terminal |
| AU2018402444A AU2018402444B2 (en) | 2018-01-12 | 2018-01-12 | User Equipment, and Uplink Transmission Timing Adjustment Method |
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| EP3739975A4 (en) | 2021-08-25 |
| AU2022201078A1 (en) | 2022-03-10 |
| CN111567104B (zh) | 2022-07-12 |
| MX2020007299A (es) | 2020-09-25 |
| JPWO2019138559A1 (ja) | 2020-12-17 |
| BR112020013851A2 (pt) | 2020-12-01 |
| EP3739975A1 (en) | 2020-11-18 |
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