WO2021049014A1 - 端末及び通信方法 - Google Patents
端末及び通信方法 Download PDFInfo
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- WO2021049014A1 WO2021049014A1 PCT/JP2019/036137 JP2019036137W WO2021049014A1 WO 2021049014 A1 WO2021049014 A1 WO 2021049014A1 JP 2019036137 W JP2019036137 W JP 2019036137W WO 2021049014 A1 WO2021049014 A1 WO 2021049014A1
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- random access
- pdcch
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- transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a terminal and a communication method in a wireless communication system.
- Non-Patent Document 1 NR (New Radio) (also called “5G”), which is the successor system to LTE (Long Term Evolution), the requirements are a large-capacity system, high-speed data transmission speed, low delay, and simultaneous operation of many terminals. Techniques that satisfy connection, low cost, power saving, etc. are being studied (for example, Non-Patent Document 1).
- NR a high frequency band is used compared to LTE. Since the propagation loss increases in the high frequency band, it has been studied to apply beamforming with a narrow beam width to a radio signal to improve the received power in order to compensate for the propagation loss (for example, non-patent documents). 2).
- 3GPP TS 38.300 V15.3.0 (2018-09) 3GPP TS 38.211 V15.3.0 (2018-09) 3GPP TSG-RAN WG2 Meeting # 105, R2-1901255, Athens, Greece, 25 Feb-01 Mar 2019 3GPP TSG-RAN WG2 Meeting # 105, R2-1901256, Athens, Greece, 25 Feb-01 Mar 2019 3GPP TS 38.321 V15.3.0 (2018-09)
- BFR Beam Failure Recovery
- CFRA Content Free Random Access process
- Non-Patent Document 5 the terminal falls back to Contention Based Random Access process (CBRA), and the terminal performs BFR with CBRA.
- a transmitter that transmits a random access preamble, a receiver that receives a random access response, and after the receiver receives the random access response, the receiver receives spatial filter setting information.
- a terminal including a control unit that uses a spatial filter applied to the transmission of the random access preamble for transmission of an uplink control signal at a time interval until the reception of the random access preamble.
- a method for clarifying the beam assumed by the terminal is provided after CBRA.
- LTE Long Term Evolution
- LTE-Advanced LTE-Advanced and later methods (eg, NR) unless otherwise specified.
- SS Synchronization signal
- PSS Primary SS
- SSS Secondary SS
- PBCH Physical broadcast channel
- PRACH Physical
- NR-SS NR-SS
- NR-PBCH Physical broadcast channel
- PRACH Physical
- the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other system (for example, Flexible Duplex, etc.). Method may be used.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- Method may be used.
- the method of transmitting a signal using the transmission beam may be digital beamforming for transmitting a signal obtained by multiplying the precoding vector (precoded by the precoding vector). It may be analog beamforming that realizes beamforming by using a variable phase shifter in an RF (Radio Frequency) circuit. Similarly, the method of receiving a signal using the received beam may be digital beamforming in which a predetermined weight vector is multiplied by the received signal, or beamforming is realized by using a variable phase device in the RF circuit. It may be analog beamforming. Hybrid beamforming, which combines digital beamforming and analog beamforming, may be applied for transmission and / or reception.
- transmitting a signal using a transmission beam may be transmitting a signal at a specific antenna port.
- receiving a signal using a receive beam may be receiving a signal at a particular antenna port.
- the antenna port refers to a logical antenna port or a physical antenna port defined by the 3GPP standard.
- the precoding or beamforming may be referred to as a precoder, a spatial domain filter, or the like.
- the method of forming the transmission beam and the reception beam is not limited to the above method.
- a method of changing the angle of each antenna may be used, or a method of using a precoding vector and a method of changing the angle of the antenna may be used in combination.
- different antenna panels may be switched and used, a method of combining a method of using a plurality of antenna panels in combination may be used, or another method may be used.
- a plurality of different transmission beams may be used in the high frequency band.
- the use of multiple transmission beams is called multi-beam operation, and the use of one transmission beam is called single-beam operation.
- “configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the base station apparatus 10 Alternatively, the radio parameter notified from the terminal 20 may be set.
- FIG. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
- the wireless communication system according to the embodiment of the present invention includes the base station device 10 and the terminal 20 as shown in FIG. Although FIG. 1 shows one base station device 10 and one terminal 20, this is an example, and there may be a plurality of each.
- the base station device 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
- the physical resources of the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
- the base station device 10 transmits a synchronization signal and system information to the terminal 20. Synchronous signals are, for example, NR-PSS and NR-SSS. A part of the system information is transmitted by, for example, NR-PBCH, and is also referred to as broadcast information.
- the synchronization signal and the broadcast information may be periodically transmitted as an SS block (SS / PBCH block) composed of a predetermined number of OFDM symbols.
- the base station apparatus 10 transmits a control signal or data to the terminal 20 by DL (Downlink), and receives the control signal or data from the terminal 20 by UL (Uplink). Both the base station apparatus 10 and the terminal 20 can perform beamforming to transmit and receive signals.
- the reference signal transmitted from the base station device 10 includes a CSI-RS (Channel State Information Rerence Signal), and the channel transmitted from the base station device 10 is a PDCCH (Physical Downlink Control). Channel) and PDSCH (Physical Downlink Shared Channel) are included.
- CSI-RS Channel State Information Rerence Signal
- the terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine).
- the terminal 20 uses various communication services provided by the wireless communication system by receiving the control signal or data from the base station apparatus 10 by DL and transmitting the control signal or data to the base station apparatus 10 by UL.
- the channels transmitted from the terminal 20 include PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel).
- an antenna port is defined by the fact that the channel on which a symbol is transmitted at the antenna port can be estimated from the channel on which another symbol is transmitted at the antenna port.
- the fact that two antenna ports are QCL (quasi co-located) means that one of the antenna ports has a propagation path characteristic including, for example, delay spread, doppler spread, doppler shift, average gain, average delay, or spatial reception parameter.
- the propagation path characteristics of the other antenna port can be estimated from the propagation path characteristics. That is, if the two antenna ports are QCL, the large scale characteristics of the radio channels corresponding to the two different antenna ports (delay spread, doppler spread, doppler shift, average gain, average delay or spatial reception parameters, etc.) will be Can be considered identical.
- QCL type A relates to Doppler shifts, Doppler spreads, average delays, delay speeds.
- QCL type B relates to Doppler shifts and Doppler spreads.
- QCL type C relates to Doppler shift, average delay.
- the QCL type D relates to a spatial reception parameter (Spatial Rx parameter).
- QCL means one or more of "QCL type A", “QCL type B", “QCL type C” or "QCL type D" when the type is not specified. ..
- FIG. 2 is a diagram for explaining an example in which the TCI state is set in the embodiment of the present invention.
- a TCI (Transmission configuration indicator) state is defined.
- the TCI state indicates the QCL relationship of the DL reference signal, and one or more TCI states are included in the RRC (Radio Resource Control) signaling that sets the control resource set (CORESET).
- the DL reference signal is an SS block or CSI-RS. That is, one of the TCI states is applied by a certain control resource set, and the DL reference signal corresponding to the TCI state is determined.
- step S1 the base station apparatus 10 transmits PDCCH-Config to the terminal 20 via RRC signaling.
- the PDCCH-Config includes information for the terminal 20 to receive the PDCCH, and may be notified to the terminal 20 as broadcast information, or may be notified to the terminal 20 by other RRC signaling.
- the PDCCH-Config includes information that defines the control resource set and information that defines the search space.
- step S2 the terminal 20 determines the control resource set, search space, and TCI state to be used based on the PDCCH-Config received in step S1.
- the terminal 20 monitors the control information in the determined search space.
- step S3 when the PDCCH-Config contains information indicating that the TCI status is notified by the DCI, the base station apparatus 10 dynamically transfers the TCI status to the terminal 20 by the DCI which is the PHY layer signaling. You can notify. Subsequently, the terminal 20 changes to the notified TCI state (S4). Steps S3 and S4 do not have to be performed.
- step S5 the random access procedure is executed by the base station device 10 and the terminal 20.
- the terminal 20 monitors the control information by assuming a QCL based on the SS block or CSI-RS selected for transmitting the PRACH.
- the execution order of steps S1-S4 and S5 does not matter. Either step S1-S4 or step S5 may be executed first.
- the search space for monitoring the control signal is associated with the control resource set.
- the RRC signaling that sets the search space notifies the terminal 20 of the association between the search space and the control resource set.
- the terminal 20 monitors the control signal corresponding to the control resource set in the search space.
- the TCI states may be dynamically switched by DCI (Downlink control information).
- One of the search spaces is the ra-Search Space, that is, the Type 1 PDCCH CSS (Common search space) set used in the random access procedure.
- the QCL assumption is that in the case of non-collision type random access triggered by the PDCCH order, the SS block assumed in the reception of the PDCCH order or CSI-RS and QCL.
- the SS selected by the terminal 20 for PRACH transmission when monitoring the PDCCH of Msg2 or Msg4 and the corresponding PDCCH in the Type1 PDCCH CSS set Assume blocks or CSI-RS and QCL.
- one of the search spaces is Searchspace # 0 for receiving RMSI (Remaining minimum system information), OSI (Other system information), paging, etc., which include system information required for communication.
- RMSI Remaining minimum system information
- OSI Olether system information
- paging etc.
- the timing of monitoring is specified for each of all SS blocks transmitted from the base station apparatus 10. That is, in Searchspace # 0, unlike other Searchspaces, the monitoring timing is different for each assumed SS block.
- FIG. 3 is a flowchart for explaining an example (1) of monitoring a control signal according to the embodiment of the present invention.
- the terminal 20 monitors the PDCCH of Msg2 or Msg4 in the Type 1 PDCCH CSS set. After that, if the terminal 20 has not received the setting of Type3 PDCCH CSS set or USS (UE specific search space) set, Type1 PDCCH CSS set may be used. That is, the Type 1 PDCCH CSS set is used for PDCCH monitoring until the terminal 20 receives the RRC reconstruction including the Type 3 PDCCH CSS set or the USS set setting.
- the case where the terminal 20 does not receive the setting of Type3 PDCCH CSS set or USS set means that the setting of Type3 PDCCH CSS set or USS set is not received from the base station device 10 after the RRC connection.
- the case where the setting of Type3 PDCCH CSS set or USS set has not been received from the base station apparatus 10 since the random access was started, or both cases are included.
- "random access" when the setting of Type3 PDCCH CSS set or USS set has not been received from the base station device 10 since the above random access is started is a non-collision type random access triggered by the PDCCH order. This includes the case where only random access other than the above is supported, the case where all random access is supported, and / or both cases.
- "when the setting of Type3 PDCCH CSS set or USS set has not been received from the base station apparatus 10" shall correspond to any of the above-mentioned cases.
- step S10 the terminal 20 transmits a random access preamble. Subsequently, the terminal 20 starts monitoring the random access response window in the Type 1 PDCCH CSS set (S11). The random access response is Msg2. Subsequently, the terminal 20 receives the random access response (S12) and completes the random access procedure (S13).
- step S14 the terminal 20 starts monitoring the PDCCH in the Type 1 PDCCH CSS set.
- the terminal 20 monitors with the Type 1 PDCCH CSS set there is a case where the QCL assumption is not specified.
- the SS block or CSI-RS selected by the terminal 20 may always be assumed as the QCL when monitoring with the Type1 PDCCH CSS set until the RRC reconstruction including the setting of the Type3 PDCCH CSS set or the USS set is received.
- the QCL assumed at the time of receiving the PDCCH order may be assumed.
- the TCI status set in the corresponding CORE SET may be ignored until the RRC reconstruction including the setting of the Type3 PDCCH CSS set or the USS set is received.
- the terminal 20 may use the set TCI status as the assumption of the QCL.
- non-collision type random access or non-collision triggered by PDCCH order such as handover is assumed.
- a QCL relationship with the SS block or CSI-RS selected by the terminal 20 is assumed.
- the above QCL relationship may be assumed for the reception of the PDCCH of Msg2 or Msg4 and the corresponding PDSCH, the PDCCH that triggers the retransmission of Msg3, the PDCCH after Msg4, and the corresponding PDSCH.
- step S15 the RRC reconstruction including the setting of the Type3 PDCCH CSS set or the USS set is received (S15), and the monitoring of the PDCCH is started in the Type3 PDCCH CSS set or the USS set (S16).
- FIG. 4 is a flowchart for explaining an example (2) of monitoring a control signal according to the embodiment of the present invention.
- Steps S20 to S22 shown in FIG. 4 are the same as steps S10 to S12 shown in FIG.
- steps S27 to S29 shown in FIG. 4 are the same as steps S14 to S16 shown in FIG.
- Steps different from FIG. 3 are steps S23 to S26 shown in FIG.
- the terminal 20 transmits Msg3. Subsequently, the terminal 20 starts monitoring Msg4 in the Type 1 PDCCH CSS set (S24). Subsequently, the terminal 20 receives Msg4 (S25) and completes the random access procedure (S26).
- the PDCCH or the corresponding PDCCH monitored by the terminal 20 with the Type 1 PDCCH CSS set after the selection is another PDCCH. It is stipulated that monitoring is not necessary if the other PDCCH does not have a QCL type D relationship with the corresponding SSB or CSI-RS.
- the other PDCCH is, for example, a PDCCH monitored by Type 0 / 0A / 2/3 PDCCH CSS set or USS set.
- the other PDCCH is used. If there is no QCL type D relationship with the PDCCH order, it is not necessary to monitor. In other words, if the other PDCCH is not in a QCL type D relationship with the PDCCH and PDCCH monitored by the Type 1 PDCCH CSS set, it may be specified that the terminal 20 does not have to monitor the other PDCCH.
- the PDCCH order setting for non-collision type random access will be described below.
- the PDCCH order that triggers RACH is scrambled by C-RNTI (Cell specific Radio Network Temporary Identifier) and can be received by USS or CSS.
- C-RNTI Cell specific Radio Network Temporary Identifier
- USS or CSS Cell specific Radio Network Temporary Identifier
- the PDCCH for reception after Msg2 is monitored only by Type1 PDCCH CSS. That is, the search space for receiving the PDCCH order and the Type 1 PDCCH CSS used for reception after Msg2 may be different. Therefore, the CORESET that receives the PDCCH order and the CORESET that is used in the reception after Msg2 may be different. This is because CORESET is set for each search space.
- SSB as the QCL is set as the QCL in the CORESET associated with any searchspace to which important information such as paging, OSI or RMSI is notified.
- important information such as paging, OSI or RMSI is notified.
- monitoring of Type 1 PDCCH CSS set is prioritized after random access is started, paging, OSI, RMSI, etc. may not be able to be monitored.
- the terminal 20 may assume that SSB is specified as the QCL type D as the config of the TCI state of the CORESET to which the PDCCH order is transmitted.
- SSB is specified as the QCL type D as the config of the TCI state of the CORESET to which the PDCCH order is transmitted.
- another reference signal such as CSI-RS may be specified.
- the SS block is specified as the QCL type D, or the required operation is that the search space such as paging, OSI, or RMSI is a searchspace. It may only be applied if it is associated with # 0.
- the SS block be specified as the QCL type D as the TCI state association of the CORESET to which the PDCCH order is transmitted, or the required operation is a search space such as paging, OSI, or RMSI. It may be applied only when the TCI state set in the CORESET associated with is an SS block.
- any search space such as paging, OSI or RMSI is associated with searchspace # 0
- the TCI status set in CORESET to which any search space such as paging, OSI or RMSI is associated is Only in the case of the SS block, it is assumed or may be required that the SS block is specified as the QCL type D as the configuration of the TCI status of the CORESET to which the PDCCH order is transmitted.
- Type1 PDCCH CSS when monitoring Type1 PDCCH CSS during random access procedure by assuming or requiring SS block as QCL type D as the control of TCI state of COREST to which PDCCH order is transmitted. Since the operation uses the SS block as D, the terminal 20 can simultaneously perform monitoring of other CSS such as paging, OSI or RMSI.
- the terminal 20 can monitor the PDCCH search space assuming an appropriate QCL during the random access procedure and after the completion of the random access procedure.
- the terminal can appropriately monitor the control signal transmitted from the base station device.
- BFR Beam Failure Recovery
- the Beam Failure Recovery (BFR) is executed by the terminal 20 based on the Content Free Random Access process (CFRA).
- CFRA Content Free Random Access process
- the terminal 20 falls back to the Contention Based Random Access process (CBRA), and the terminal 20 executes BFR on the CBRA.
- CBRA Contention Based Random Access process
- the base station apparatus 10 cannot know whether the terminal 20 is executing CBRA for the purpose of BFR or for another purpose.
- Non-Patent Document 3 Non-Patent Document 4
- Non-Patent Document 3 proposes to introduce a rule for prioritizing SSB selection in CBRA according to the purpose (condition) for triggering CBRA.
- the terminal 20 When CBRA is performed for a reason other than BFR, the terminal 20 gives priority to the SSB corresponding to the beam set for receiving the PDCCH, and indicates to the NW that the TCI setting is unnecessary.
- the terminal 20 When CBRA is performed for BFR, the terminal 20 gives priority to SSB other than SSB corresponding to the beam set for receiving PDCCH, and it is necessary to set a new TCI for BFR. Inform the NW of that.
- Non-Patent Document 3 describes the following Observations.
- Terminal 20 assumes a beam indicated by the CFRA preamble for PDCCH reception until either TCI activation is received or the RRC resets the TCI state configuration.
- the terminal 20 After receiving Observation 2: Msg4, the terminal 20 falls back using the setting for PDCCH reception, which was active before RA procedure, but this has a problem with BFR, and then the beamfairure. It can lead to detections.
- the terminal 20 when performing a BFR with a CBRA, the terminal 20 does not take over the settings for PDCCH reception that were active before the RA procedure, but falls back to the CBRA to select a random access preamble in the CBRA. It is conceivable to use the SSB detected in 1 as QCL.
- terminal 20 For conflict-based PRACH transmissions in slot n, upon expiration of the beamFailureRecoveryTimer, terminal 20 is a DCI with a CRC scrambled in RA-RNTI, starting from slot n + 4, within a window set by the ra-ResponseWindow. PDCCH is monitored in a set of search spaces set by ra-SearchSpace or searchSpaceZero for detection of.
- the terminal 20 activates the TCI state by the upper layer or TCI-StatesPDCCH-ToAdlist and / or TCI-StatesPDCCH- Until receiving any of the parameters, the terminal 20 has the same DM-RS antenna port quasi-collocation parameter associated with the SS / PBCH block that the terminal 20 has selected for contention-based PRACH transmission.
- the RS antenna port quasi-collocation parameter is assumed.
- the terminal 20 After the terminal 20 detects a DCI format having a CRC scrambled by RA-RNTI in the search space set by ra-SearchSpace or searchSpaceZero, the terminal 20 detects TCI status or TCI-StatesPDCCH-ToAdlist and / or TCI-. Until the MAC CE activation command of StatesPDCCH-ToReleaseList is received, the terminal 20 continues to monitor the PDCCH candidate in the search space set by ra-SearchSpace or searchSpaceZero.
- the QCL assumed by the terminal 20 can be known from the random access preamble to which the base station device 10 is also sent. Since the QCL at the time of CFRA is not assumed at the time of falling back to CBRA, there are few changes in specifications and terminal implementation.
- CORESET Control
- the terminal 20 may monitor the PDCCH in the CORESET.
- the recoverySearchSpaceId it is assumed that the terminal 20 is set with another search space set for monitoring the PDCCH in the CORESET associated with the search space set set by the recoverySearchSpaceId. It does not have to be.
- the terminal 20 may receive the setting of PRACH transmission by the parameter of the upper layer, PRACH-ResourceDedicatedBFR.
- the terminal 20 detects the DCI format with CRC scrambled by C-RNTI or MCS-C-RNTI in the window set by the upper layer parameter BeamFairureRecoveryConfig. Therefore, PDCCH monitoring may be performed in the search space set, which is the search space set set by the recoverySearchSpaceId and starts from slot n + 4.
- the terminal 20 receives the activation of the TCI status or the TCI-StatesPDCCH-ToAdlist and / or the higher layer parameter of the higher layer. until it receives one of the parameters of the TCI-StatesPDCCH-ToReleaseList a parameter, the same antenna port quasi-collocation parameters and antenna port quasi-collocation parameters associated with the index q new new may be assumed.
- the terminal 20 After the terminal 20 detects the DCI format with CRC scrambled by C-RNTI or MCS-C-RNTI in the search space set set by recoverySearchSpaceId, the terminal 20 receives the MAC CE activation command of the TCI state. Or, monitoring of PDCCH candidates may continue in the search space set set by the recoverySearchSpaceId until TCI-StatesPDCCH-ToAdlist and / or TCI-StatusPDCCH-ToReriseList is received.
- the first in the search space set which is the search space set set by the recoverySearchSpaceId, in which the terminal 20 detects a DCI with a CRC scrambled by C-RNTI or MCS-C-RNTI.
- the terminal 20 receives the activation command of PUCCH-Spatialrelationinfo which is a parameter of the upper layer, or the terminal 20 is set to PUCCH-Spatialrelationinfo for the PUCCH resource.
- 20 may transmit the PUCCH in the same cell as the cell in which the PRACH transmission is performed, using the same spatial filter as the spatial filter applied to the last PRACH transmission.
- the transmission power at the time of transmitting the PUCCH may be specified by the specifications.
- the first in the search space which is the search space set set by the recoverySearchSpaceId, in which the terminal 20 detects a DCI format with a CRC scrambled by C-RNTI or MCS-C-RNTI.
- the terminal 20 can be assumed the same antenna port quasi-collocation parameters and antenna port quasi-collocation parameter associated with an index q new new for PDCCH monitoring in CORESET index 0 Good.
- the link recovery may be executed by CBRA.
- Example 1 in the case of link recovery by CBRA will be described.
- the search space set which is a search space set set by the parameter of the upper layer, ra-SearchSpace, in which the terminal 20 detects DCI with CRC scrambled by RA-RNTI.
- ra-SearchSpace in which the terminal 20 detects DCI with CRC scrambled by RA-RNTI.
- the terminal 20 may transmit the PUCCH in the same cell as the cell that transmitted the PRACH, using the same spatial filter as the spatial filter of the last PRACH transmission.
- the transmission power in the transmission of the PUCCH may be specified by the specifications.
- Example 2 in the case of link recovery by CBRA will be described.
- the first (in time direction) in the search space where the terminal 20 detects the DCI format with the CRC scrambled by RA-RNTI, which is the search space set set by the ra-SearchSpace.
- the terminal 20 after 28 symbols from the last symbol in the reception of the PDCCH, the terminal 20, the same antenna as the antenna port quasi-collocation parameter associated with an index q new new for PDCCH monitoring in the index 0 CORESET (CORESET set by system information)
- Port quasi-collocation parameters may be assumed.
- Example 1 (Modified example of Example 1)
- the case of link recovery by CBRA is assumed.
- the examples are not limited to this example.
- a case of normal CBRA other than the case of link recovery by CBRA may be assumed.
- the operations of the terminal 20 and the base station 10 can be shared between the CBRF for the BFR and the normal CBRA, so that the operations of the terminal 20 and the base station 10 can be simplified. Is possible.
- Example 2 (Modified example of Example 2)
- the case of link recovery by CBRA is assumed.
- the examples are not limited to this example.
- a case of normal CBRA other than the case of link recovery by CBRA may be assumed.
- the operations of the terminal 20 and the base station 10 can be shared between the CBRF for the BFR and the normal CBRA, so that the operations of the terminal 20 and the base station 10 can be simplified. Is possible.
- the base station apparatus 10 and the terminal 20 include a function of carrying out the above-described embodiment.
- the base station apparatus 10 and the terminal 20 may each have only a part of the functions in the embodiment.
- FIG. 5 is a diagram showing an example of the functional configuration of the base station device 10.
- the base station apparatus 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
- the functional configuration shown in FIG. 5 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
- the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal and the like to the terminal 20.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads the setting information from the storage device as needed.
- the contents of the setting information are, for example, control information of the terminal 20 and information related to random access.
- the control unit 140 performs a process of generating control information to be transmitted to the terminal as described in the embodiment. Further, the control unit 140 controls the random access procedure with the terminal 20.
- the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
- FIG. 6 is a diagram showing an example of the functional configuration of the terminal 20.
- the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in FIG. 6 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
- the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals and the like transmitted from the base station apparatus 10. Further, for example, the transmission unit 210 connects the other terminal 20 to PSCCH (Physical Sidelink Control Channel), PSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) as D2D communication. Etc., and the receiving unit 120 receives PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
- PSCCH Physical Sidelink Control Channel
- PSCH Physical Sidelink Shared Channel
- PSDCH Physical Sidelink Discovery Channel
- PSBCH Physical Sidelink Broadcast Channel
- the setting unit 230 stores various setting information received from the base station device 10 or the terminal 20 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed.
- the setting unit 230 also stores preset setting information.
- the contents of the setting information are, for example, control information of the terminal 20 and information related to random access.
- the control unit 240 monitors the control signal based on the control information acquired from the base station apparatus 10 as described in the embodiment. Further, the control unit 240 controls the random access procedure with the base station device 10.
- the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
- each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't.
- a functional block (constituent unit) that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
- transmitting unit transmitting unit
- transmitter transmitter
- the base station device 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 7 is a diagram showing an example of the hardware configuration of the base station apparatus 10 and the terminal 20 according to the embodiment of the present disclosure.
- the above-mentioned base station device 10 and terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. You may.
- the word “device” can be read as a circuit, device, unit, etc.
- the hardware configuration of the base station device 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- the processor 1001 For each function of the base station device 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
- CPU Central Processing Unit
- control unit 140, control unit 240, and the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
- a program program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
- the control unit 140 of the base station device 10 shown in FIG. 5 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the control unit 240 of the terminal 20 shown in FIG. 6 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- 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, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured.
- the storage device 1002 may be referred to as 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, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
- -It may be composed of at least one of a ray (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.
- the auxiliary storage device 1003 may be referred to as an auxiliary storage device.
- the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station device 10 and the terminal 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array). It may be configured to include hardware, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
- a terminal including a control unit that uses a spatial filter applied to the transmission of the random access preamble for transmission of an uplink control signal.
- the above configuration it is possible to clarify the beam (QCL, spatial relation) assumed by the user device after the BFR by the CBRA. Further, when the above configuration is applied to a normal CBRA other than the case of link recovery by CBRA, the operation of the terminal and the base station can be made common between the CBRF for BFR and the normal CBRA. Therefore, it is possible to simplify the operation of the terminal and the base station.
- the random access preamble may be applied to a collision-type random access procedure for performing a Beam Failure Recovery (BFR).
- BFR Beam Failure Recovery
- the control unit receives 28 symbols from the last symbol in the physical downlink control channel (PDCCH) in which the receiving unit first receives the random access response, and then until the receiving unit receives the setting information of the spatial filter.
- the spatial filter applied to the transmission of the random access preamble may be used to transmit the uplink signal.
- the control unit After receiving the random access response by the receiving unit, the control unit is associated with an index for monitoring the physical downlink control channel (PDCCH) in the Control Resource Set (CORESET) of the index 0 as an antenna port quasi-collocation parameter.
- the antenna port quasi-collocation parameter may be set.
- a method of communication by a terminal comprising a step of using a filter to transmit an uplink control signal.
- the above configuration it is possible to clarify the beam (QCL, spatial relation) assumed by the user device after the BFR by the CBRA. Further, when the above configuration is applied to a normal CBRA other than the case of link recovery by CBRA, the operation of the terminal and the base station can be made common between the CBRF for BFR and the normal CBRA. Therefore, it is possible to simplify the operation of the terminal and the base station.
- the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
- the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the base station device 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof.
- the software operated by the processor of the base station apparatus 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only, respectively. It may be stored in a memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
- RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
- Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
- system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
- the specific operation performed by the base station apparatus 10 in the present specification may be performed by its upper node.
- various operations performed for communication with the terminal 20 include the base station device 10 and other than the base station device 10. It is clear that it can be done by at least one of the network nodes (eg, MME or S-GW, etc., but not limited to these).
- the network nodes eg, MME or S-GW, etc., but not limited to these.
- the other network nodes may be a combination of a plurality of other network nodes (for example, MME and S-GW). Good.
- the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
- the input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
- the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.) When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- a channel and a symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier CC: Component Carrier
- CC Component Carrier
- system and “network” used in this disclosure are used interchangeably.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
- the radio resource may be indexed.
- base station Base Station
- radio base station base station
- base station device fixed station
- NodeB NodeB
- eNodeB eNodeB
- GNB gNodeB
- access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”
- Terms such as “cell group,” “carrier,” and “component carrier” can be used interchangeably.
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)).
- Communication services can also be provided by Remote Radio Head).
- the term "cell” or “sector” is a part or all of the coverage area of at least one of the base station and the base station subsystem that provides the communication service in this coverage. Point to.
- MS Mobile Station
- UE User Equipment
- Mobile stations can be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless, depending on the trader. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of terminals 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the terminal 20 may have the functions of the base station apparatus 10 described above.
- words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side”).
- an uplink channel, a downlink channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station may have the functions of the above-mentioned user terminal.
- determining and “determining” used in this disclosure may include a wide variety of actions.
- “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as “judgment” or “decision”.
- judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access.
- Accessing (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
- judgment and “decision” mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming”, “expecting”, “considering” and the like.
- connection means any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
- the connection or connection between the elements may be physical, logical, or a combination thereof.
- connection may be read as "access”.
- the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
- the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
- RS Reference Signal
- Pilot Pilot
- references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
- each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
- the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
- the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver.
- SCS subcarrier spacing
- TTI Transmission Time Interval
- At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
- the mini-slot may also be referred to as a sub-slot.
- a minislot may consist of a smaller number of symbols than the slot.
- PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI slot or one minislot
- You may. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each terminal 20 to allocate radio resources (frequency bandwidth that can be used in each terminal 20, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
- PRB Physical resource block
- SCG Sub-Carrier Group
- REG Resource Element Group
- PRB pair an RB pair, and the like. May be called.
- the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
- the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
- the QCL type D is an example of QCL information.
- the SS block or CSI-RS is an example of a synchronization signal or a reference signal.
- the PDCCH order is an example of instruction by the control channel.
- Type 1 PDCCH CSS set is an example of the first search space.
- Type 0 / 0A / 2/3 PDCCH CSS set or USS set is an example of the second search space.
- Type0 PDCCH CSS set or Searchspace # 0 is an example of a third search space.
- Base station device 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device
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Abstract
Description
また、Type3 PDCCH CSS set又はUSS setの設定を含むRRC reconfigurationを受信するまでは、対応するCORESETに設定されたTCI stateを無視してもよい。
以下において、Contention Based Random Access procedure(CBRA)によるBFR(Beam Failure Recovery)の後に端末20が想定すべきビーム(QCL、spatial relation)を明確化する方法について説明する。
以下において、CBRAによるリンクリカバリの場合の例1を説明する。CBRAによるリンクリカバリの場合、上位レイヤのパラメータであるra-SearchSpaceにより設定されるサーチスペースセットであって、端末20がRA-RNTIによりスクランブルされたCRCを伴うDCIを検出する、サーチスペースセット、における(時間方向における)最初のPDCCHの受信における最後のシンボルから28シンボル後、端末20がPUCCH-Spatialrelationinfoのアクティベーションコマンドを受信するか、又はPUCCHリソースに対するPUCCH-Spatialrelationinfoが設定されるまでの時間間隔において、端末20は、PRACHの送信を行ったセルと同じセルにおいて、最後のPRACHの送信の空間フィルタと同じ空間フィルタを使用して、PUCCHを送信してもよい。当該PUCCHの送信における送信電力は、仕様により規定されてもよい。
以下において、CBRAによるリンクリカバリの場合の例2を説明する。CBRAによるリンクリカバリの場合、ra-SearchSpaceにより設定されるサーチスペースセットであって、端末20がRA-RNTIによりスクランブルされたCRCを伴うDCIフォーマットを検出する、サーチスペース、における(時間方向における)最初のPDCCHの受信における最後のシンボルから28シンボル後、端末20は、インデックス0のCORESET(システム情報により設定されるCORESET)におけるPDCCHモニタリングに対するインデックスqnewに関連付けられたアンテナポートquasi-collocationパラメータと同じアンテナポートquasi-collocationパラメータを想定してもよい。
上述の例1では、CBRAによるリンクリカバリの場合を想定している。しかしながら、実施例は、この例には限定されない。例えば、上述の例1において、CBRAによるリンクリカバリの場合以外の通常のCBRAの場合を想定してもよい。この構成によれば、BFRのためのCBRFと、通常のCBRAとの間で端末20及び基地局10の動作を共通化することができるので、端末20及び基地局10の動作を簡略化することが可能となる。
上述の例2では、CBRAによるリンクリカバリの場合を想定している。しかしながら、実施例は、この例には限定されない。例えば、上述の例2において、CBRAによるリンクリカバリの場合以外の通常のCBRAの場合を想定してもよい。この構成によれば、BFRのためのCBRFと、通常のCBRAとの間で端末20及び基地局10の動作を共通化することができるので、端末20及び基地局10の動作を簡略化することが可能となる。
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10及び端末20の機能構成例を説明する。基地局装置10及び端末20は上述した実施例を実施する機能を含む。ただし、基地局装置10及び端末20はそれぞれ、実施例の中の一部の機能のみを備えることとしてもよい。
図5は、基地局装置10の機能構成の一例を示す図である。図5に示されるように、基地局装置10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図5に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
図6は、端末20の機能構成の一例を示す図である。図6に示されるように、端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図6に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
上記実施形態の説明に用いたブロック図(図5及び図6)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
本明細書には、少なくとも下記の端末及び通信方法が開示されている。
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10及び端末20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10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端末20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。
110 送信部
120 受信部
130 設定部
140 制御部
20 端末
210 送信部
220 受信部
230 設定部
240 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 (5)
- ランダムアクセスプリアンブルを送信する送信部と、
ランダムアクセスレスポンスを受信する受信部と、
前記受信部による前記ランダムアクセスレスポンスの受信後、前記受信部が空間フィルタの設定情報を受信するまでの時間間隔において、前記ランダムアクセスプリアンブルの送信に適用した空間フィルタを上り制御信号の送信に使用する制御部と、
を備える端末。 - 前記ランダムアクセスプリアンブルは、Beam Failure Recovery(BFR)を行うための、衝突型ランダムアクセス手順に適用される、
請求項1記載の端末。 - 前記制御部は、前記受信部が前記ランダムアクセスレスポンスを最初に受信した物理下りリンク制御チャネル(PDCCH)における最後のシンボルから28シンボル後、前記受信部が前記空間フィルタの設定情報を受信するまでの時間間隔において、前記ランダムアクセスプリアンブルの送信に適用した空間フィルタを前記上り信号の送信に使用する、
請求項2記載の端末。 - 前記制御部は、前記受信部による前記ランダムアクセスレスポンスの受信後、アンテナポートquasi-collocationパラメータとして、インデックス0のControl Resource Set(CORESET)における物理下りリンク制御チャネル(PDCCH)のモニタリングに対するインデックスに関連付けられたアンテナポートquasi-collocationパラメータを設定する、
請求項1記載の端末。 - ランダムアクセスプリアンブルを送信するステップと、
ランダムアクセスレスポンスを受信するステップと、
前記ランダムアクセスレスポンスの受信後、空間フィルタの設定情報を受信するまでの時間間隔において、前記ランダムアクセスプリアンブルの送信に適用した空間フィルタを上り制御信号の送信に使用するステップと、
を備える端末による通信方法。
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