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WO2016017715A1 - Dispositif d'utilisateur et procédé de commande de synchronisation d'émission en liaison montante - Google Patents

Dispositif d'utilisateur et procédé de commande de synchronisation d'émission en liaison montante Download PDF

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Publication number
WO2016017715A1
WO2016017715A1 PCT/JP2015/071553 JP2015071553W WO2016017715A1 WO 2016017715 A1 WO2016017715 A1 WO 2016017715A1 JP 2015071553 W JP2015071553 W JP 2015071553W WO 2016017715 A1 WO2016017715 A1 WO 2016017715A1
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Prior art keywords
user apparatus
frame structure
timing
carrier
signal
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Ceased
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PCT/JP2015/071553
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English (en)
Japanese (ja)
Inventor
徹 内野
高橋　秀明
ウリ アンダルマワンティ ハプサリ
一樹 武田
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NTT Docomo Inc
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NTT Docomo Inc
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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a mobile communication system, and particularly relates to uplink transmission timing control in carrier aggregation.
  • CA Carrier Aggregation
  • a PCell Primary cell
  • SCell Secondary cell
  • the user apparatus UE can connect to the PCell and add an SCell as necessary.
  • the PCell is a cell similar to a cell in the LTE system that supports RLM (Radio Link Monitoring), SPS (Semi-Persistent Scheduling), and the like.
  • SCell is a cell that is added to the PCell and set for the user apparatus UE.
  • the addition, setting change, and deletion of the SCell are performed by RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the SCell Immediately after being set for the user apparatus UE, the SCell is in an inactive state (deactivate state). is there.
  • Activation / deactivation of the SCell is controlled by a MAC signal from the base station eNB.
  • FFT is collectively performed on uplink signals from different user apparatuses UE received in the base station eNB to perform signal demodulation.
  • 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 in accordance with the reception timing of the downlink signal from the base station eNB, in the base station eNB, The uplink signal of each user apparatus UE is received at a different timing, and the base station eNB cannot perform the FFT at a desired timing.
  • the base station eNB adjusts the transmission timing of the uplink signal of each user apparatus UE, and performs control so that the reception timing shift in the base station eNB falls within a predetermined time. This is called TA (Time alignment) control. Specifically, the base station eNB measures the difference between the reception timing of the actual uplink signal with respect to the desired uplink signal reception timing to each user apparatus UE and instructs the user apparatus UE to shift the uplink signal timing forward by the difference. It is carried out. Note that the uplink transmission timing adjustment instruction from the base station eNB can be notified by a random access procedure or a MAC control signal.
  • CA there is a form in which CA is operated between a macro cell and a small cell of different frequencies, as illustrated in FIG.
  • the base station eNB forms PCell and SCell1 as macro cells, and further forms SCell2 and SCell3 which are small cells by RRE (remote radio equipment) extending from the base station eNB.
  • RRE remote radio equipment
  • radio characteristics such as propagation delay are different between CCs to which the user apparatus UE is aggregated.
  • uplink transmission timing control in units of UEs, a reception timing shift in the base station eNB occurs, and the cell Due to internal interference, uplink transmission timing control is required for each aggregated CC.
  • CCs (cells) set in the user apparatus UE are grouped by those having almost the same radio characteristics, and each CC (cell) group (TAG: Timing Advance Group) is grouped.
  • TAG Timing Advance Group
  • uplink transmission timing adjustment control is performed. That is, a TAG is a group of cells that use the same uplink transmission timing.
  • the “same uplink transmission timing” does not have to be exactly the same, and may be regarded as “the same uplink transmission timing” if the difference in uplink transmission timing between cells is within a predetermined range.
  • TAG is roughly classified into pTAG (primary TAG) including PCell in CA and sTAG (secondary TAG) including only SCell without including PCell.
  • pTAG primary TAG
  • SCell1 and SCell3 are set for the user apparatus UE.
  • a timing reference cell is defined as a DL cell to be referred to when adjusting the DL timing or the clock in the apparatus (for example, Non-Patent Document 1).
  • each cell in the pTAG refers to the PCell as the timing reference cell
  • the user apparatus UE autonomously selects the timing reference cell. ing.
  • LTE Long Term Evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • LTE Rel LTE Rel.
  • a plurality of CCs constituting a CA are limited to the same duplex mode.
  • Rel-12 it is possible to extend the CA and perform CA using CCs of different duplex modes.
  • CA using CCs of different duplex modes will be described as TDD-FDD CA.
  • FIG. 4A is a diagram illustrating a TA in a case where only SFDs of FDD are included without including SCells having different frame structures (duplex modes) in sTAG. As shown in FIG.
  • FIG. 4A in the sTAG, a time earlier than the DL signal reception timing by TA is set as the UL signal transmission timing.
  • FIG. 4B shows a case where an SCell having a different frame structure (duplex mode) is included in the sTAG.
  • a time earlier by TA + 624Ts than the DL reception timing is set as the UL signal transmission timing.
  • UL transmission timing to which NTA offset is applied is described in 8.1 Uplink-downlink frame timing of Non-Patent Document 3.
  • the above-mentioned control is performed because the NTAoffset to be applied differs depending on the duplex mode (0 for FDD, 624Ts for TDD), and it is necessary to align to either within the same sTAG. is there.
  • Ts is a predetermined time.
  • 624Ts is added in the case of TDD is because the base station eNB considers the time for switching between UL reception and DL transmission.
  • the above prior art does not consider the activation / deactivation of the SCell in the sTAG and the presence / absence of UL CC setting. Therefore, for example, when all the TDD SCells in the sTAG are deactivated or when the UL CC is deleted, it is assumed that the user apparatus UE autonomously stops the advance of the TA. Since such control depends on the implementation of the user apparatus UE, it may be considered that such control is not performed in another user apparatus UE. Since the base station eNB cannot expect such control to be performed, when the control is performed, the UL transmission timing may be shifted and UL interference may occur. In other words, the conventional technique has a problem that UL interference may occur because the offset value cannot be appropriately applied in the transmission timing control of the uplink signal of the user apparatus UE.
  • the present invention has been made in view of the above points, and has a function of performing communication with another communication device by carrier aggregation using a carrier having a specific frame structure and a carrier having a frame structure different from the specific frame structure. It is an object of the present invention to provide a technique that can appropriately apply an offset value in uplink signal transmission timing control of a user apparatus including
  • a user apparatus having a function of communicating with another communication apparatus by carrier aggregation using a carrier having a specific frame structure and a carrier having a frame structure different from the specific frame structure.
  • a signal transmission unit for transmitting an uplink signal to the communication device;
  • a signal receiving unit for receiving a downlink signal from the communication device;
  • Timing adjustment unit for performing timing control for shifting the transmission timing of the upstream signal transmitted from the signal transmission unit to the communication device with reference to the reception timing of the downstream signal from the communication device received by the signal reception unit And comprising
  • the timing adjustment unit is configured such that a secondary cell using a carrier having the specific frame structure satisfies a predetermined condition.
  • a user apparatus is provided that uses a predetermined offset value for the timing control for the cell group when it is determined whether or not the predetermined condition is satisfied.
  • a user having a function of performing communication with another communication device by carrier aggregation using a carrier having a specific frame structure and a carrier having a frame structure different from the specific frame structure.
  • An uplink transmission timing control method executed by an apparatus comprising: A timing adjustment step for performing timing control for shifting the transmission timing of the uplink signal to the communication device with reference to the reception timing of the downlink signal from the communication device; In the timing adjustment step, the user apparatus uses a secondary cell using a carrier having the specific frame structure in a cell group including secondary cells using the same uplink transmission timing among the cells used for the carrier aggregation. Determines whether or not a predetermined condition is satisfied, and when the predetermined condition is satisfied, an uplink transmission timing control method using a predetermined offset value for the timing control for the cell group is provided.
  • a user apparatus having a function of performing communication with another communication apparatus by carrier aggregation using a carrier having a specific frame structure and a carrier having a frame structure different from the specific frame structure.
  • an offset value can be appropriately applied.
  • LTE Long Term Evolution
  • FIG. 5 shows a configuration diagram of a communication system according to the embodiment of the present invention.
  • the communication system in the present embodiment is a mobile communication system including a base station eNB and a user apparatus UE.
  • the communication system in the present embodiment is a mobile communication system including a base station eNB and a user apparatus UE.
  • one base station eNB and one user apparatus UE are shown, but this is for the convenience of illustration, and there may be a plurality of each.
  • the base station eNB itself has a radio unit, and a radio unit (RRE: remote radio apparatus) is installed at a location away from the base station eNB.
  • wireless part is a part of base station eNB, and is connected with the base station eNB, for example with an optical fiber.
  • CA can be performed by PCell and SCell in the same manner as in the embodiment shown in FIG.
  • the base station eNB configures one or a plurality of small cells for the user apparatus UE based on the measurement result of the CC for the small cell received from the user apparatus UE connected to the macro cell.
  • An RRC message for adding the SCell is transmitted.
  • the base station eNB transmits a signal for activating the SCell to the user apparatus UE.
  • user apparatus UE performs CA with a small cell and a macro cell.
  • the user apparatus UE receives, for example, the MTA setting (that is, the setting of sTAG and pTAG) by the RRC message received from the base station eNB, grasps the TA for the TAG by the MAC signal, and uses the TA and the NTAoffset. Then, the UL transmission timing for each TAG is adjusted.
  • the MTA setting that is, the setting of sTAG and pTAG
  • the RRC message received from the base station eNB grasps the TA for the TAG by the MAC signal, and uses the TA and the NTAoffset. Then, the UL transmission timing for each TAG is adjusted.
  • the user apparatus UE when a frame structure (duplex mode) cell different from others is set in the same sTAG (that is, FDD and TDD are mixed in the SCell constituting the sTAG).
  • Condition example 1 applies 624Ts regardless of whether the UL CC of each SCell is set or activated / deactivated when a different duplex mode cell is set in the same sTAG. is there.
  • SCell1 TDD
  • SCell2 FDD
  • SCell3 FDD
  • NTAoffset 624Ts in the UL transmission timing control in the SCell included in the sTAG.
  • TDD Frame structure 2
  • the presence or absence of UL CC in the TDD SCell in the activated state is not a condition. That is, only the DL CC is set in the TDD SCell in the activated state, and the condition example 2 is applied even when the UL CC is not set.
  • SCell1 TDD
  • SCell2 FDD
  • SCell3 FDD
  • FIG. 6B shows that in the user apparatus UE, SCell1 (TDD), SCell2 (FDD), and SCell3 (FDD) are set as sTAG, but SCell1 is in an inactive state.
  • TDD SCell1
  • FDD SCell2
  • FDD SCell3
  • the setting of UL CC with respect to SCell is performed by RRC signaling, for example.
  • the SCell is set, the DL is always set.
  • Condition Example 3 the activation / deactivation state of the TDD SCell in which the UL CC is set is not a condition. That is, Condition Example 3 is applied even if the TDD SCell in which the UL CC is set is in an inactive state.
  • Example of application in Condition Example 3 will be described with reference to FIGS. 7A and 7B.
  • SCell1 TDD
  • SCell2 TDD
  • SCell3 FDD
  • SCell1 is set for both DL and UL.
  • NTAoffset 624Ts is applied in the sTAG.
  • TDD Frame structure 2
  • Condition Example 4 Application examples in Condition Example 4 will be described with reference to FIGS. 8A and 8B.
  • SCell1 TDD
  • SCell2 TDD
  • SCell3 FDD
  • SCell1 of TDD is set for both DL and UL and is in an activated state.
  • NTAoffset 624Ts is applied in the sTAG.
  • FIG. 8B shows that in the user apparatus UE, SCell1 (TDD), SCell2 (TDD), and SCell3 (FDD) are set as sTAG, and SDD1 of TDD is set for both DL and UL, but is in an inactive state.
  • SDD1 of TDD is set for both DL and UL, but is in an inactive state.
  • NTAoffset 0 is applied in the sTAG.
  • This notification includes, for example, the ID of the corresponding sTAG, information indicating that 624Ts is applied, and the like.
  • This notification includes, for example, the ID of the corresponding sTAG, information indicating that the application of 624Ts is stopped, and the like.
  • the trigger for the notification may be the start / stop of application of 624Ts as described above, or may be that the condition for applying 624Ts is satisfied / the condition is not satisfied.
  • the signal used for notification may be any of an RRC signal, a MAC signal, and a PHY signal.
  • TTT Time To Trigger
  • the number of protection steps may be added in order to prevent frequent reporting when conditions are satisfied but not dynamically changed.
  • the non-application is determined and the application / non-application of 624Ts is notified to the base station eNB, the UL transmission may be stopped when the application / non-application of 624Ts changes.
  • the user apparatus UE may simply stop the UL transmission, or may stop (or assume that the TA timer managed for the sTAG has expired),
  • the individual resources (SRS resources) of the SCell may be released, or all the SCells in the sTAG may be deactivated.
  • whether or not to perform UL transmission stop control as described above may be notified from the base station eNB to the user apparatus UE by RRC signaling, a MAC signal, or the like.
  • the base station eNB when the base station eNB notifies the user apparatus UE that it has the above-described condition determination function for applying 624Ts, the base station eNB performs application control of 624Ts according to the application condition of 624Ts, and the base station eNB This UL transmission stop control may be performed when the user apparatus UE is not notified of having the application condition determination function.
  • Modification 1 Next, Modification 1 will be described. Since Modification 1 basically assumes Dual Connectivity, first, an outline of Dual Connectivity will be described.
  • Dual connectivity has been proposed that performs simultaneous communication and achieves high throughput (non-patent document 4). That is, in Dual connectivity, the user apparatus UE performs communication using radio resources of two physically different base stations eNB at the same time.
  • Dual connectivity is a type of CA, also called Inter eNB CA (carrier aggregation between base stations), and introduces Master-eNB (MeNB) and Secondary-eNB (SeNB) .
  • DC Dual connectivity
  • Inter eNB CA carrier aggregation between base stations
  • MeNB Master-eNB
  • SeNB Secondary-eNB
  • a cell (one or a plurality) under the MeNB is referred to as an MCG (Master Cell Group, master cell group), and a cell (one or a plurality) under the SeNB is referred to as an SCG (Secondary Cell Group, secondary cell group).
  • a UL CC is set in at least one SCell of the SCGs, and a PUCCH is set in one of them.
  • This SCell is referred to as PSCell (primary SCell). In addition, this may be called a special cell.
  • DC is a type of CA
  • PCell and SCell are set
  • NTAoffset value should be determined based on the duplex mode of PSCell, but a different frame structure is used for sTAG including PSCell. If it is determined whether or not the SCell is set and the NTAoffset value is determined, the complexity of device mounting increases.
  • the user apparatus UE when performing TDD-FDD CA in DC, applies NTAoffset according to the duplex mode of PSCell and does not include PSCell for sTAG including PSCell.
  • the control as described above (condition examples 1 to 4 described above) is applied.
  • notification of application / non-application of NTAoffset 624Ts to the base station (MeNB or SeNB, or both MeNB and SeNB) Also good.
  • FIG. 10 shows a configuration example of a communication system in Modification 1 to which DC is applied.
  • the communication system according to the first modification includes a base station MeNB and a base station SeNB that are connected to the core network 10, and enables dual connectivity (DC) between the user apparatuses UE. .
  • the base station MeNB and the base station SeNB can communicate with each other through, for example, an X2 interface.
  • the setting of PCell and SCell can be performed using MCG as a macro cell and SCG as a small cell as shown in FIG.
  • deletion, and setting change of SCell (including PSCell) in the user apparatus UE are performed by RRC signaling from the base station MeNB, the present invention is not limited to this.
  • the activation / deactivation of the SCell may be performed by the base station SeNB for the SCG, and may be performed by the base station MeNB for the MCG, or may be performed by the base station MeNB for all the SCells.
  • PSCell FDD
  • SCell1 TDD
  • SCell2 FDD
  • FIG. 11B shows that PSCell (TDD), SCell1 (TDD), and SCell2 (FDD) are set as sTAG in the user apparatus UE.
  • PSCell is TDD
  • DC is basically assumed, but the control method based on the duplex mode of the PSCell shown in the first modification can be applied without being limited to the DC.
  • the PSCell function eg, PUCCH transmission function
  • the PSCell function is also used for CA.
  • the PSCell function is used for CA, the same as DC is used. NTAoffset control can be performed.
  • the SCell is distinguished from other SCells.
  • the NTAoffset value is determined based on the duplex mode as in the case of the PSCell.
  • SCell in CA that is not DC will be referred to as a special SCell.
  • the control as described above is applied for the sTAG that does not include the special SCell.
  • the application / non-application of NTAoffset 624Ts may be notified to the base station eNB.
  • FIG. 12A An application example of Modification 1 in which the special SCell is applied will be described with reference to FIGS.
  • SCell1 (with FDD and PUCCH), SCell2 (TDD), and SCell3 (FDD) are set as sTAG in the user apparatus UE.
  • SCell1 is a special SCell
  • FIG. 12B shows that SCell1 (FDD), SCell2 (TDD), and SCell3 (FDD) are set as sTAG in the user apparatus UE.
  • SCell1 FDD
  • SCell2 TDD
  • UL UL
  • NTAoffset 624Ts is applied.
  • Modification 2 In mobile communication, the user apparatus UE and the base station eNB generally perform communication between the user apparatuses UE by performing communication (cellular communication). However, in recent years, the user apparatus UE is used by using an LTE radio interface. Various techniques for D2D communication in which direct communication is performed between them are being studied. In the D2D communication technology, the user apparatus UE performs direct communication between the user apparatuses UE using radio resources (time / frequency resources) used in LTE communication.
  • one user apparatus UE transmits (broadcasts) a Discovery signal (discovery signal) including its own identification information, and the other user apparatus UE receives the Discovery signal, so that the communication partner Communication for discovering the user apparatus UE, communication (communication) performed between the user apparatuses UE after discovery.
  • a Discovery signal discovery signal
  • communication communication
  • D2D communication it is assumed that communication is currently performed with one carrier (CC).
  • CC carrier
  • D2D communication using a plurality of carriers may be extended in the future.
  • FIG. 13A communication in which D2D communication and communication between the base station eNB and the user apparatus UE are simultaneously performed is conceivable.
  • FIG. 13B communication using a plurality of carriers can be considered for D2D communication.
  • the base station eNB is considered as the base station eNB shown in FIG. 5 (or the MeNB shown in FIG. 10)
  • the user apparatus UE2 is considered as the RRE shown in FIG. 5 (or the SeNB shown in FIG. 10)
  • the user apparatus UE2 is regarded as a base station eNB that performs CA, and CA communication is performed between the user apparatus UE1 and a cell including a plurality of SCells (sTAG can be configured).
  • NTAoffset 624Ts
  • 624Ts is used for NTA offset of TDD, but in D2D communication, an offset value defined separately may be used instead of 624Ts.
  • FIG. 14 shows a functional configuration diagram of the user apparatus UE in the embodiment of the present invention (including modifications 1 and 2).
  • the user apparatus UE includes a DL signal reception unit 101, a UL signal transmission unit 102, a CA control unit 103, an SCell state storage unit 104, and a UL transmission timing adjustment unit 105.
  • FIG. 14 shows only functional units that are particularly relevant to the present invention in the user apparatus UE, and the user apparatus UE also has a function (not shown) for performing an operation based on at least LTE.
  • the configuration illustrated in FIG. 14 is merely an example, and any name may be used for the function classification and the function unit as long as the function can execute the processing described in the present embodiment.
  • the DL signal receiving unit 101 receives various downlink signals from the base station eNB.
  • the UL signal transmission unit 102 transmits various uplink signals to the base station eNB.
  • the DL signal receiving unit 101 and the UL signal transmitting unit 102 also have a function of performing communication by CA (including DC) using a plurality of CCs.
  • the CA control unit 103 manages PC (including DC), SCell (including PSCell, special SCell) management (including storing the SCell state in the SCell state storage unit 104), and the base station eNB. Control related to CA in the user apparatus UE, such as addition / deletion of SCell, setting / change of UL / DL configuration of SCell, activation / deactivation, and the like.
  • the SCell state storage unit 104 stores the SCell state.
  • the SCell state storage unit 104 includes at least SCell information (ID, etc.) belonging to the sTAG, SCell configuration (UL / DL setting presence / absence, PSCell / special SCell, etc.), SCell activation / deactivation state. Etc., necessary information for determining NTAoffset in TA control is stored.
  • the UL transmission timing adjustment unit 105 performs TA control, that is, UL transmission timing adjustment, based on the TA value received from the base station eNB and the NTAoffset value determined by the state stored in the SCell state storage unit 104. Do.
  • TA control that is, UL transmission timing adjustment
  • the DL signal reception timing of the timing reference cell in the TAG can be used as the DL signal reception timing as a reference of the UL signal transmission timing of each cell.
  • the UL transmission timing adjustment unit 105 also includes a function of performing the above-described UL transmission stop control.
  • the user apparatus UE communicates with the base station eNB (including MeNB and SeNB). However, as described in the second modification, the user apparatus UE may communicate with other user apparatuses. Similar control is possible.
  • the base station eNB including MeNB and SeNB.
  • the user apparatus UE may communicate with other user apparatuses. Similar control is possible.
  • the UL transmission timing adjustment unit 105 refers to the SCell state storage unit 104, determines whether there is a TDD SCell in the sTAG (step 202), and proceeds to step 203 if there is.
  • the UL transmission timing adjustment unit 105 refers to the SCell state storage unit 104 to determine whether there is an activated SCell in the TDD SCell in the sTAG (step 203). Proceed to 204.
  • MTA sTAG, pTAG, etc.
  • the UL transmission timing adjustment unit 105 refers to the SCell state storage unit 104, determines whether there is a TDD SCell in the sTAG (step 302), and proceeds to step 303 if there is.
  • the UL transmission timing adjustment unit 105 refers to the SCell state storage unit 104 and determines whether there is an SCell in which the UL CC is set in the TDD SCell in the sTAG (step 303). If so, go to Step 304.
  • FIG. 17 shows an operation example 3 of the user apparatus UE. This corresponds to the first modification.
  • SCA including PSCell
  • MTA sTAG, pTAG, etc.
  • the UL transmission timing adjustment unit 105 refers to the SCell state storage unit 104, determines whether there is a PSCell in the sTAG (step 402), and proceeds to step 403 if there is, and proceeds to step 404 if not.
  • UL transmission timing adjustment section 105 performs UL transmission timing adjustment by applying NTAoffset according to the duplex mode of PSCell in the sTAG.
  • the function of performing communication with other communication apparatuses by carrier aggregation using a carrier having a specific frame structure and a carrier having a frame structure different from the specific frame structure A signal transmission unit that transmits an uplink signal to the communication device, a signal reception unit that receives a downlink signal from the communication device, and an uplink to the communication device that is transmitted from the signal transmission unit
  • a timing adjustment unit that performs timing control to shift a signal transmission timing forward with reference to a reception timing of a downlink signal from the communication device that is received by the signal reception unit, and the timing adjustment unit includes the carrier aggregation Among secondary cells that use the same uplink transmission timing In the cell group, it is determined whether a secondary cell using the carrier having the specific frame structure satisfies a predetermined condition, and when the predetermined condition is satisfied, the timing control for the cell group is predetermined.
  • a user equipment is provided that uses the offset value of.
  • the offset value can be appropriately applied.
  • the predetermined condition is, for example, that a secondary cell using a carrier having the specific frame structure is in an activated state.
  • a secondary cell using a carrier having the specific frame structure is in an activated state.
  • the predetermined condition may be that uplink communication is set in a secondary cell that uses a carrier having the specific frame structure. In this configuration, since the predetermined offset value is applied when uplink communication is set, it is possible to suppress the use of useless offset values.
  • the signal transmission unit may notify the communication device that the predetermined offset value is used.
  • a communication apparatus eg, a base station
  • the signal transmission unit may notify the communication device that the predetermined offset value is no longer used.
  • a communication apparatus eg, a base station
  • the timing adjustment unit has a function of stopping uplink signal transmission from the signal transmission unit in the cell group when a secondary cell using the carrier having the specific frame structure satisfies the predetermined condition, or When a secondary cell that uses a carrier having a specific frame structure does not satisfy the predetermined condition, it may have a function of stopping uplink signal transmission from the signal transmission unit in the cell group.
  • the counterpart communication device eg, base station
  • the timing adjustment unit may perform the timing control using an offset value corresponding to a frame structure of the secondary cell when there is a secondary cell in which a physical uplink control channel is set in the cell group. Good.
  • the offset value can be determined based on the frame structure of the special cell in which the physical uplink control channel is set, so that the processing can be simplified.
  • the secondary cell in which the physical uplink control channel is set is, for example, a PSCell in dual connectivity. With this configuration, the effect of the simplification of processing can be obtained in dual connectivity.
  • the communication device is, for example, a base station or another user device that performs D2D communication with the user device.
  • the offset value can be appropriately applied not only in normal cellular communication but also in D2D communication.
  • the functional configuration of the user apparatus UE described in the present embodiment may be a configuration realized by executing a program by a CPU (processor) in the user apparatus UE including a CPU and a memory.
  • the configuration may be realized by hardware such as a hardware circuit having processing logic described in the above embodiment, or a program and hardware may be mixed.
  • the base station eNB described in the present embodiment may also have a configuration realized by a program being executed by a CPU (processor) in a base station eNB including a CPU and a memory.
  • the configuration may be realized by hardware such as a hardware circuit provided with the processing logic described in the above, or a program and hardware may be mixed.
  • 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 user apparatus UE has been described using a functional block diagram, but such an apparatus may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor of the user apparatus UE and the software operated by the processor of the base station according to the embodiment of the present invention are random access memory (RAM), flash memory, read-only memory (ROM), EPROM, respectively. , EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.
  • eNB eNB, MeNB, SeNB Base station UE
  • DL signal reception unit 102
  • UL signal transmission unit 103
  • CA control unit 104
  • SCell state storage unit 105 UL transmission timing adjustment unit

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un dispositif d'utilisateur qui est pourvu d'une unité d'ajustement de synchronisation qui exécute une commande de synchronisation au moyen de laquelle la synchronisation d'émission d'un signal de liaison montante est décalée en utilisant la synchronisation de réception d'un signal de liaison descendante comme référence, l'unité d'ajustement de synchronisation déterminant, dans un groupe de cellules comportant des cellules secondaires utilisant la même synchronisation d'émission en liaison montante parmi des cellules utilisées dans une agrégation de porteuses, si une cellule secondaire qui utilise une porteuse ayant une structure de trame spécifiée satisfait ou non des conditions prescrites, et dans le cas dans lequel lesdites conditions prescrites sont satisfaites, utilisant une valeur de décalage prescrite pour la commande de synchronisation dudit groupe de cellules.
PCT/JP2015/071553 2014-07-31 2015-07-29 Dispositif d'utilisateur et procédé de commande de synchronisation d'émission en liaison montante Ceased WO2016017715A1 (fr)

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JP7066748B2 (ja) 2018-01-12 2022-05-13 株式会社Ｎｔｔドコモ 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
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JPWO2019138559A1 (ja) * 2018-01-12 2020-12-17 株式会社Ｎｔｔドコモ ユーザ装置、及び上り送信タイミング調整方法
US11570762B2 (en) 2018-01-12 2023-01-31 Ntt Docomo, Inc. User equipment, and uplink transmission timing adjustment method
WO2019138559A1 (fr) * 2018-01-12 2019-07-18 株式会社Ｎｔｔドコモ Dispositif utilisateur et procédé de réglage de temps de transmission de liaison montante
CN110167133A (zh) * 2018-02-13 2019-08-23 华为技术有限公司 一种上行同步方法及装置
US11558841B2 (en) 2018-02-13 2023-01-17 Huawei Technologies Co., Ltd. Uplink synchronization method, and apparatus
CN110167133B (zh) * 2018-02-13 2021-08-13 华为技术有限公司 一种上行同步方法及装置
CN111937454A (zh) * 2018-04-05 2020-11-13 株式会社Ntt都科摩 用户装置和无线基站
CN111937454B (zh) * 2018-04-05 2024-03-01 株式会社Ntt都科摩 用户装置和无线基站
JP2021521703A (ja) * 2018-04-13 2021-08-26 ノキア テクノロジーズ オサケユイチア ビーム管理のためのセルグループ化
US11368995B2 (en) 2018-04-13 2022-06-21 Nokia Technologies Oy Cell grouping for beam management
JP7295884B2 (ja) 2018-04-13 2023-06-21 ノキア テクノロジーズ オサケユイチア ビーム管理のためのセルグループ化
CN112970296A (zh) * 2018-11-13 2021-06-15 株式会社Ntt都科摩 用户装置以及基站装置
WO2021140595A1 (fr) * 2020-01-08 2021-07-15 株式会社Ｎｔｔドコモ Dispositif de communication sans fil et procédé de communication sans fil

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