WO2020166043A1 - ユーザ端末及び無線通信方法 - Google Patents
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Definitions
- the present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
- LTE Long Term Evolution
- UMTS Universal Mobile Telecommunications System
- Non-Patent Document 1 LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- a successor system to LTE for example, 5th generation mobile communication system (5G), 5G+(plus), New Radio (NR), 3GPP Rel. 15 or later) is also under consideration.
- 5G 5th generation mobile communication system
- 5G+(plus) 5th generation mobile communication system
- NR New Radio
- 3GPP Rel. 15 or later 3th generation mobile communication system
- the frequency band for example, Rel. 8-12
- license carrier for example, license carrier
- license component carrier licensed to the telecommunications carrier (operator), etc.
- the license CC for example, 800 MHz, 1.7 GHz, 2 GHz or the like is used.
- unlicensed band for example, a 2.4 GHz band, a 5 GHz band or the like in which Wi-Fi (registered trademark) or Bluetooth (registered trademark) can be used is assumed.
- LAA License-Assisted Access
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- NR is also considering using an unlicensed band. Before transmitting data in the unlicensed band, listening (also called Listen Before Talk (LBT)) is performed.
- LBT Listen Before Talk
- NR also uses the Synchronization Signal (SS)/Physical Broadcast CHannel (PBCH) block (SS block (SSB)).
- SS Synchronization Signal
- PBCH Physical Broadcast CHannel
- SS block SS block
- a user terminal for example, User Equipment (UE)
- UE User Equipment
- RRC Radio Resource Control
- the UE preferably determines the Quasi-Co-Location (QCL) assumption between the SSB indexes in consideration of the LBT failure. That is not yet considered. Further, when the ssb-PositionsInBurst is not available, the UE preferably considers the LBT failure and preferably determines the QCL assumption between SSB indexes. If these are not clearly defined, the PDCCH cannot be appropriately monitored, which may reduce the communication throughput.
- QCL Quasi-Co-Location
- an object of the present disclosure is to provide a user terminal and a wireless communication method that can appropriately consider the QCL assumption regarding SSB in an NR-U carrier.
- a user terminal includes a receiving unit that receives a synchronization signal block (Synchronization Signal Block (SSB)), and a demodulation reference signal (PBCH) for a broadcast channel (Physical Broadcast Channel (PBCH)) included in the SSB. Acquires the effective SSB index based on DeModulation Reference Signal (DMRS), information on the number of the effective SSB indexes transmitted from the payload of the PBCH, and the Discovery Reference Signal (DRS) transmission window
- DMRS DeModulation Reference Signal
- DRS Discovery Reference Signal
- FIG. 1 is a diagram showing an example of a relationship between a PDCCH monitoring opportunity for OSI in Rel-15 NR and SSB.
- FIG. 2 is a diagram showing an example of the relationship between the PDCCH monitoring opportunity for paging in Rel-15 NR and the SSB.
- 3A and 3B are diagrams illustrating an example of extension of SSB transmission candidate positions.
- FIG. 4 is a diagram showing another example of extension of SSB transmission candidate positions.
- 5A and 5B are diagrams showing an example of a problem of SCL QCL assumption.
- FIG. 6 is a diagram illustrating an example of QCL assumption between SSB indexes according to an embodiment.
- FIG. 7 is a diagram illustrating another example of QCL assumption between SSB indexes according to an embodiment.
- FIG. 1 is a diagram showing an example of a relationship between a PDCCH monitoring opportunity for OSI in Rel-15 NR and SSB.
- FIG. 2 is a diagram showing an example of the
- FIG. 8 is a diagram showing yet another example of QCL assumption between SSB indexes in one embodiment.
- FIG. 9 is a diagram illustrating an example of a relationship between a PDCCH monitoring opportunity for paging and SSB according to an embodiment.
- 10A-10C are diagrams illustrating an example of specifying an effective SSB index according to an embodiment.
- 11A-11C are diagrams illustrating an example of specifying an effective SSB index according to an embodiment.
- FIG. 12 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 13 is a diagram illustrating an example of the configuration of the base station according to the embodiment.
- FIG. 14 is a diagram illustrating an example of the configuration of the user terminal according to the embodiment.
- FIG. 15 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.
- Unlicensed band In the unlicensed band (for example, 2.4 GHz band, 5 GHz band, 6 GHz band), it is assumed that a plurality of systems such as a Wi-Fi system and a system supporting LAA (LAA system) coexist. It is considered that transmission collision avoidance and/or interference control between the plurality of systems are required.
- LAA system LAA system
- CSMA Carrier Sense Multiple Access
- CA collision Avoidance
- DIFS Distributed access Inter Frame Space
- ACK ACK knowledge
- the data transmission device is configured to transmit data to another device (for example, a base station, a user terminal, a Wi-Fi device, etc.) before transmitting data in the unlicensed band.
- Listening to confirm the presence or absence of transmission also called Listen Before Talk (LBT), Clear Channel Assessment (CCA), carrier sense, channel sensing, or channel access operation is performed.
- the transmission device may be, for example, a base station (for example, gNodeB (gNB)) in the downlink (DL) or a user terminal (for example, User Equipment (UE)) in the uplink (UL).
- gNB gNodeB
- UE User Equipment
- the receiving device that receives data from the transmitting device may be, for example, a UE in DL and a base station in UL.
- the transmission device starts data transmission after a predetermined period (for example, immediately or a backoff period) after it is detected that there is no transmission of another device (idle state) in the LBT. ..
- NR systems that use unlicensed bands may be called NR-Unlicensed (U) systems, NR LAA systems, etc.
- Dual connectivity Dual Connectivity (DC)) between licensed band and unlicensed band, Stand-Alone (SA) of unlicensed band, etc.
- DC Dual Connectivity
- SA Stand-Alone
- the node eg, base station, UE
- NR-U starts transmission after confirming that the channel is idle (idle) by LBT because of coexistence with other systems or other operators.
- the base station or UE acquires the transmission opportunity (Transmission Opportunity (TxOP)) and transmits when the LBT result is idle (LBT-idle). The base station or the UE does not transmit when the LBT result is busy (LBT-busy).
- TxOP Transmission Opportunity
- the transmission opportunity time is also called Channel Occupancy Time (COT).
- LBT-idle may be replaced by the LBT success.
- LBT-busy may be replaced by LBT failure.
- a synchronization signal/broadcast channel (Synchronization Signal/Physical Broadcast Channel (SS/PBCH)) block is used.
- the SS/PBCH block includes a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), a broadcast channel (Physical Broadcast Channel (PBCH)) (and a demodulation reference signal for PBCH ( DeModulation Reference Signal (DMRS))).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- PBCH Physical Broadcast Channel
- DMRS DeModulation Reference Signal
- the SS/PBCH block may be called a synchronization signal block (Synchronization Signal Block (SSB)).
- SSB Synchronization Signal Block
- OSI Operating System Information
- RMSI Remaining Minimum System Information
- the PDCCH monitoring opportunity may be the same as the PDCCH monitoring opportunity for System Information Block 1 (SIB1).
- SIB1 System Information Block 1
- the relationship (mapping) between the PDCCH monitoring opportunity and the SSB index may be determined based on ⁇ 13 of 3GPP TS 38.213.
- the PDCCH monitoring opportunity may be referred to as a PDCCH monitoring period or the like.
- the UE When the search space ID for OSI or paging is not zero and the UE is in idle/inactive mode (IDLE/INACTIVE mode), the UE is actually transmitted SSB (actually transmitted SSB) and PDCCH monitoring.
- the PDCCH monitoring opportunity to monitor for OSI or paging may be determined based on the relationship of opportunities (for example, ⁇ 7.1 of 3GPP TS 38.304, ⁇ 5 of TS 38.331, etc.).
- FIG. 1 is a diagram showing an example of a relationship between a PDCCH monitoring opportunity for OSI in Rel-15 NR and SSB.
- SI window length corresponds to the length of a window (period) that can be used for SI scheduling, and, for example, 5 slots, 10 slots,..., 1280 slots are set in the UE by higher layer signaling. Good.
- the upper layer signaling may be, for example, any of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or the like, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- MAC CE MAC Control Element
- PDU MAC Protocol Data Unit
- the broadcast information may be, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), RMSI, OSI, or the like.
- MIB Master Information Block
- SIB System Information Block
- RMSI OSI
- the system information (SI) cycle corresponds to the SI message cycle in radio frame units, and for example, 8 radio frames, 16 radio frames,... 512 radio frames may be set in the UE by higher layer signaling.
- the UE may be configured with upper layer parameters (eg may be referred to as Radio Resource Control (RRC) parameter “ssb-PositionsInBurst”) related to some aggregated SSB transmission units.
- the SSB transmission unit may be called an SSB transmission period, SSB set, SS burst, SS burst set, SSB burst, or simply burst.
- the SS burst may mean a set of SSBs included in a predetermined period (eg, half frame (0.5 radio frame)).
- the upper layer parameter may be referred to as information (parameter) regarding the position of the time domain of the SSB to be transmitted in the SS burst.
- the upper layer parameter is described as ssb-PositionsInBurst, but the name is not limited to this.
- the size (bit length) of ssb-PositionsInBurst may differ depending on the frequency used by the serving cell.
- the ssb-PositionsInBurst may be defined as, for example, 4 bits for a frequency of 3 GHz or 2.4 GHz or less, 8 bits for a frequency of 3 GHz or 2.4 GHz to 6 GHz, and 64 bits for other frequencies.
- the size of ssb-PositionsInBurst may be 4 or 8 bits when the SSB subcarrier spacing (SubCarrier Spacing (SCS)) is 15 kHz or 30 kHz, or 8 bits when the SSB subcarrier spacing is 120 kHz or 240 kHz. May be larger.
- the frequency, SCS, size of ssb-PositionsInBurst, etc. are not limited to these.
- ssb-PositionsInBurst is a bitmap in which the leftmost (first) bit corresponds to SSB index #0, the second bit corresponds to SSB index #1, and so on.
- the SSB transmission candidate position in the figure is shown.
- the bit value "1" indicates that the corresponding SSB is transmitted, and "0" indicates that the corresponding SSB is not transmitted.
- the SSB transmission candidate position may represent the position of the first symbol of the SSB candidate.
- the SSB index may indicate the position of the SSB per a predetermined period (for example, half frame (0.5 wireless frame)).
- the SSB index may be represented by a maximum 3-bit number in Frequency Range 1 (FR1), and may be acquired by the UE by the DMRS sequence of PBCH.
- FR1 Frequency Range 1
- FR2 Frequency Range 2
- the SSB index may be represented by a total of 6 bits, the lower 3 bits by the PBCH DMRS sequence, and the upper 3 bits by the PBCH payload, and is obtained by the UE based on these numbers. May be done.
- UE may assume that SSBs corresponding to the same SSB index of the same cell are QCL. Further, the UE does not have to assume QCL between SSBs corresponding to different SSB indexes of the same cell.
- FIG. 1 shows the PDCCH monitoring opportunities of the first, second,..., Nth, N+1th,..., Within the SI window.
- X may be a minimum integer equal to or greater than the number of monitoring opportunities in the SI window divided by N. Further, N may correspond to the number of SSBs actually transmitted (for example, if ssb-PositionsInBurst is 8 bits, it is 8 or less) determined by ssb-PositionsInBurst.
- the UE may assume the same pseudo-collocation (Quasi-Co-Location (QCL)) for PDCCH monitoring opportunities related to the same SSB. For example, the UE may receive the PDCCH assuming the same QCL as the first SSB to be transmitted at the first and N+1th PDCCH monitoring occasions in FIG. 1.
- the same shaded PDCCH monitoring opportunities in FIG. 1 may represent that the same beam is applied (or QCL with the same SSB is assumed).
- the different shaded PDCCH monitoring opportunities in FIG. 1 may represent that different beams are applied to them (or QCLs with different SSBs are assumed).
- the QCL may be an index indicating the statistical property of at least one of a signal and a channel (expressed as a signal/channel). For example, when a certain signal/channel and another signal/channel have a QCL relationship, Doppler shift, doppler spread, average delay (average delay) between these different signals/channels. ), delay spread, and spatial parameter (for example, spatial reception parameter (Spatial Rx Parameter)) are the same (meaning that at least one of them is QCL). You may.
- a predetermined control resource set COntrol REsource SET: CORESET
- channel or reference signal has a relationship with another CORESET, channel or reference signal and a specific QCL (for example, QCL type D). It may also be called QCL assumption.
- COntrol REsource SET CORESET
- QCL QCL type D
- FIG. 2 is a diagram showing an example of the relationship between the PDCCH monitoring opportunity for paging and SSB in Rel-15 NR.
- the start position of PDCCH monitoring for the paging frame (PF) and the paging downlink control information (DCI)) may be determined based on the ID of the UE.
- the PF may be defined by one or more radio frames.
- the UE may be configured with upper layer parameters (eg RRC parameter “firstPDCCH-MonitoringOccasionOfPO”) regarding the first paging opportunity (PO) in the PF.
- RRC parameter “firstPDCCH-MonitoringOccasionOfPO” regarding the first paging opportunity (PO) in the PF.
- the upper layer parameter is described as firstPDCCH-MonitoringOccasionOfPO, but the name is not limited to this.
- firstPDCCH-MonitoringOccasionOfPO When the UE is set to firstPDCCH-MonitoringOccasionOfPO, it may be assumed that the period of S PDCCH monitoring opportunities from the PDCH monitoring opportunity specified by firstPDCCH-MonitoringOccasionOfPO corresponds to PO.
- the UE may perform PDCCH monitoring for paging at the PDCCH monitoring opportunity included in the PO (timing of the shaded square in FIG. 2). Note that the unshaded squares in FIG. 2 may correspond to an opportunity of not performing PDCCH monitoring for paging, among PDCCH monitoring opportunities.
- Fig. 2 shows the first, second,..., Sth PDCCH monitoring opportunities in the PO.
- the UE may assume that the Kth PDCCH monitoring opportunity at the PO corresponds to the Kth actually transmitted SSB.
- S may correspond to the number of SSBs that are actually transmitted, which is determined by ssb-PositionsInBurst (for example, if ssb-PositionsInBurst is 8 bits, a number of 8 or less).
- the different shading in FIG. 2 may represent that different beams are applied (or QCLs with different SSBs are assumed).
- the UE is set based on the search space setting set by higher layer signaling. All PDCCH monitoring opportunities may be monitored. That is, in this case, the UE does not particularly assume the relationship between the PDCCH monitoring opportunity to monitor and the SSB index.
- ⁇ NR-U SSB> The use of SSB is also being considered in NR-U. Further, a signal including Channel State Information (CSI)-Reference Signal (RS), SSB burst set (set of SSB), and CORESET and PDSCH associated with SSB in one continuous burst signal is considered. Has been done. This signal may be called a discovery reference signal (Discovery Reference Signal (DRS), NR-U DRS, etc.), a reference signal for discovery, a discovery signal (Discovery Signal (DS)), etc.
- DRS Discovery Reference Signal
- DRS Discovery Reference Signal
- DS Discovery Signal
- the CORESET (PDCCH) associated with the above SSB may be called Remaining Minimum System Information (RMSI)-CORESET, CORESET#0, etc.
- the RMSI may be referred to as SIB1.
- the PDSCH associated with the SSB may be the PDSCH carrying the RMSI (RMSI PDSCH), or the PDCCH (System Information (SI)-Radio Network Temporary Identifier (RNTI)) in the RMSI-CORESET scrambled Cyclic Redundancy Check. It may be a PDSCH scheduled using DCI with (CRC).
- SSBs with different SSB indices may be transmitted using different beams (base station transmit beams).
- the SSB and the corresponding RMSI PDCCH and RMSI PDSCH may be transmitted using the same beam.
- SSB cannot transmit due to LBT failure, it is considered to extend the transmission candidate position of SSB. For example, in a period in which DRS may be transmitted (DRS transmission window), the SSB transmission candidate position is expanded, and the SSB (beam) that could not be transmitted due to LBT failure is changed to another transmission candidate position in the window. It is considered to be transmitted using.
- the length of the DRS transmission window may be set in the UE by higher layer signaling or may be specified by the specifications.
- the DRS transmission window may be called a DRS transmission period, a DRS transmission window period, or the like.
- 3A and 3B are diagrams showing an example of expansion of SSB transmission candidate positions.
- the SCS of the serving cell (or SSB) is 30 kHz and the slot length is 0.5 ms.
- the length of the DRS transmission window is 5 ms. Similar SCS and DRS transmission window lengths are assumed in the following drawings. Note that the application of the present disclosure is not limited to these SCS and DRS transmission window lengths.
- DRS is transmitted over four slots (slots #0 to #3).
- slot #0 of FIG. 3A SSB, CORESET (PDCCH) associated with the SSB, and PDSCH associated with the SSB (portions other than SSB and CORESET) are shown.
- the other slots may have the same arrangement.
- RMSI#i PDCCH/PDSCH
- FIG. 3B shows a case where slots #0 to #1 in FIG. 3A cannot be transmitted due to LBT busy (LBT failure).
- the UE may assume that the untransmitted beams of SSB#0-#3 are respectively transmitted using SSB#8-#11 in the slots after SSB#4-#7.
- the PDCCH monitoring opportunity for RMSI is associated with the SSB index corresponding to each SSB candidate position in the DRS window.
- FIG. 4 is a diagram showing another example of extension of SSB transmission candidate positions.
- the number of transmitted SSBs is 8 and the same as the number of beams (the number of beams is also 8 (beam index #0 to #7)).
- the SSB index actually transmitted is notified by the RRC parameter ssb-PositionsInBurst.
- SSB is transmitted at a position (different SSB index) different from the SSB candidate position quasi-statically set by ssb-PositionsInBurst to the UE.
- the SSB index actually transmitted may change for each DRS transmission period.
- NR-U is also considering receiving OSI, paging, etc. on the NR-U carrier to support standalone operation.
- the PDCCH monitoring opportunity is based on the relationship with the SSB index actually transmitted. It is determined.
- the UE determines the position of the SSB index transmitted by ssb-PositionsInBurst even if the actual transmission is performed at the SSB candidate position extended due to the LBT failure.
- the relationship between the extended SSB index not represented by ssb-PositionsInBurst and the PDCCH monitoring period is not clear.
- FR1 NR Frequency Range 1
- the available SSB candidate positions candidate resource, candidate SSB index
- NR SSBs that have been considered so far can be assigned to slots, but it is possible to use only one SSB for each slot for flexible control. If the handling of unused SSB candidate indexes (for example, which SSB index and QCL may be assumed) is not properly defined, the operation of the base station, UE, etc. becomes unclear.
- FIGS. 5A and 5B are diagrams showing an example of a problem of SCL QCL assumption.
- FIG. 5A corresponds to the case where the number of SSB (the number of beams) is less than 8.
- ssb-PositionsInBurst indicates SSB indexes #0-#3
- beam indexes #0-#3 correspond to SSB indexes #0-#3.
- slots #0-#2 are not transmitted due to LBT failure.
- SSB transmission candidate position the beam indexes #0-#3 corresponding to the SSB indexes #0-#3 that should have been transmitted in the slots #0 and #1 are transmitted.
- the beam indexes #0-#3 correspond to the SSB indexes #8-#11, but the SSB indexes #4-#7 cannot be used. Will end up. It is required to define a QCL assumption that allows the free candidate SSB index to be used without waste.
- FIG. 5B corresponds to the case where the number of SSB (the number of beams) per slot is 1.
- ssb-PositionsInBurst indicates SSB indexes #0, #2, #4 and #6, and beam indexes #0 to #3 are assigned to SSB indexes #0, #2, #4 and #6, respectively.
- beam indexes #0 to #3 are assigned to SSB indexes #0, #2, #4 and #6, respectively.
- slots #0-#2 are not transmitted due to LBT failure.
- SSB transmission candidate position the beam indexes #0 to #2 corresponding to the SSB indexes #0, #2 and #4 that should have been transmitted in the slots #0 to #2 are transmitted. It is conceivable to transmit the beam indexes #0-#2 using the SSB indexes #7-#9 immediately after the SSB index #6, respectively, so as to maintain the number of SSBs per slot to be one. It is also conceivable to transmit using SSB indexes #8, #10 and #12. Either can not be specified by the specifications examined so far.
- the UE preferably determines the QCL assumption between SSB indexes in consideration of the LBT failure. Not advanced. Further, when the ssb-PositionsInBurst is not available, the UE preferably considers the LBT failure and preferably determines the QCL assumption between SSB indexes. If these are not clearly defined, the PDCCH cannot be appropriately monitored, which may reduce the communication throughput.
- the present inventors clarified the QCL assumption between SSB indexes (SSB transmission candidate positions) in the NR-U carrier, and when the SSB index (position) transmitted by a predetermined beam changes depending on the LBT result. Even so, I conceived a method to properly realize the operation using SSB.
- the SSB corresponding to the SSB index is also simply referred to as the SSB index.
- the beam corresponding to the beam index is also simply called the beam index.
- the beam index may correspond to the set of SSB indexes that can be assumed for QCL within the DRS transmission window. Therefore, the beam index may be read as an effective SSB index.
- the SSB index that simply indicates the SSB candidate position within the DRS transmission window may be read as an SSB position index, a position index, or the like.
- the NR-U of the present disclosure is not limited to LAA, and may include a case where an unlicensed band is used standalone.
- the QCL assumption between SSB indices on the NR-U carrier may be determined by the specification and higher layer signaling. For example, in the UE, each SSB index up to a slot including an SSB corresponding to the maximum SSB index indicated by a predetermined upper layer parameter (for example, ssb-PositionsInBurst) corresponds to an SSB index of a slot subsequent to the slot. It may be assumed that SSB and QCL are in order.
- a predetermined upper layer parameter for example, ssb-PositionsInBurst
- FIG. 6 is a diagram illustrating an example of QCL assumption between SSB indexes according to an embodiment.
- ssb-PositionsInBurst indicates SSB indexes #0 to #3, that is, the maximum SSB index indicated by ssb-PositionsInBurst is 3.
- beam indexes #0-#3 correspond to SSB indexes #0-#3.
- the UE may assume that the SSB indexes #4i-#4i+3 (i is a natural number) are SSB indexes #0-#3 and QCL, respectively. That is, in this example, since the maximum SSB index indicated by ssb-PositionsInBurst corresponds to the last SSB in a certain slot, the beam repetition is partitioned by slots, which is suitable for control.
- slots #0-#2 are not transmitted due to LBT failure.
- the beam indexes #0-#3 corresponding to the SSB indexes #0-#3 that should have been transmitted in the slots #0 and #1, are the slots #3 and #4 (SSB index #6--) in the same DRS transmission window. #9) may be transmitted.
- the UE may assume that SSB indexes #6, #7, #8 and #9 are SSB indexes #2, #3, #0 and #1 and QCL, respectively. That is, the UE may assume that SSB indexes #6, #7, #8 and #9 are transmitted using beam indexes #2, #3, #0 and #1, respectively.
- FIG. 7 is a diagram showing another example of QCL assumption between SSB indexes according to an embodiment.
- ssb-PositionsInBurst indicates SSB indexes #0 to #4, that is, the maximum SSB index indicated by ssb-PositionsInBurst is 4.
- beam indexes #0-#4 correspond to SSB indexes #0-#4.
- the UE assumes that SSB index #5 included in the same slot as SSB index #4, which is the maximum SSB index indicated by ssb-PositionsInBurst, is invalid (Not Available/Not Applicable (NA)) and is actually transmitted. It is not necessary to count the number of SSBs.
- the UE may assume that SSB indexes #6i-#6i+4 (i is a natural number) are SSB indexes #0-#4 and QCL, respectively.
- the UE may assume that SSB index #6i+5 is NA, like SSB index #5. That is, in this example, even if the maximum SSB index indicated by ssb-PositionsInBurst is not the last SSB in a certain slot, beam repetition can be divided by slots, which is suitable for control.
- slots #0-#2 are not transmitted due to LBT failure.
- Beam indexes #0-#4 corresponding to SSB indexes #0-#4 that should have been transmitted in slots #0-#2 are slots #3-#5 (SSB index #6--) in the same DRS transmission window. #10) may be transmitted.
- the UE may assume that SSB indexes #6, #7, #8, #9 and #10 are SSB indexes #0, #1, #2, #3 and #4 and QCL, respectively. That is, the UE assumes that SSB indexes #6, #7, #8, #9 and #10 are transmitted using beam indexes #0, #1, #2, #3 and #4, respectively. Good.
- FIG. 8 is a diagram illustrating yet another example of QCL assumption between SSB indexes according to an embodiment.
- ssb-PositionsInBurst indicates SSB indexes #1, #3, #5, and #7, that is, the maximum SSB index indicated by ssb-PositionsInBurst is 7.
- beam indexes #0, #1, #2, and #3 correspond to SSB indexes #1, #3, #5, and #7, respectively.
- SSB index #7 which is the maximum SSB index indicated by ssb-PositionsInBurst
- off (corresponding to '0') SSB indexes #0, #2, #4 and #6 are invalid (NA ), and may not be counted as the number of SSB actually transmitted.
- the UE may assume that SSB indexes #8i+1, #8i+3, #8i+5 and #8i+7 are SSB indexes #1, #3, #5 and #7 and QCL, respectively.
- the UE may assume that the SSB indexes #8i, #8i+2, #8i+4 and #8i+6 are NA, like the SSB indexes #0, #2, #4 and #6. That is, in this example, it is possible to prevent an arbitrary SSB index from being regarded as an NA SSB index and QCL.
- slots #0-#2 are not transmitted due to LBT failure.
- SSB index #7 in slot #3 is transmitted using beam index #3.
- Beam indexes #0, #1 and #2 corresponding to SSB indexes #1, #3 and #5 that should have been transmitted in slots #0 to #2 are slots #4 to #6 in the same DRS transmission window. (SSB indexes #9, #11 and #13).
- the UE may assume that SSB indexes #9, #11 and #13 are SSB indexes #1, #3 and #5 and QCL, respectively. That is, the UE may assume that SSB indexes #7, #9, #11 and #13 are transmitted using beam indexes #3, #0, #1 and #2, respectively.
- the UE includes each SSB up to a predetermined period (eg, at least one of a subframe, a half slot, a symbol, etc.) including an SSB corresponding to the maximum SSB index indicated by ssb-PositionsInBurst. It may be assumed that the index is the SCL corresponding to the SSB index after the predetermined period and the QCL in order.
- a predetermined period eg, at least one of a subframe, a half slot, a symbol, etc.
- the index is the SCL corresponding to the SSB index after the predetermined period and the QCL in order.
- the SSB transmission candidate positions on the NR-U carrier may be in all slots within a predetermined period (for example, a half frame having a length of 5 ms).
- the candidate position may be defined beyond the predetermined period (for example, up to 6 ms).
- the SSB transmission candidate position and SSB index may be specified for all the slots within the set DRS transmission window period.
- At least one of cases A, B, C, D, and E specified in TS 38.213 ⁇ 4.1 Cell search of 3GPP Rel-15 is based on the SCS. It may be used or other candidate positions may be used.
- Case A and Case C may correspond to the case where two SSBs in one slot are not continuous (separated) in the time domain.
- Case A may be used for a 15 kHz SCS.
- Case C may be used for a 30 kHz SCS.
- Case B may correspond to the case where two SSBs in one slot are consecutive in the time domain.
- Case B may be used for 30 kHz SCS.
- the case (for example, at least one of cases B and C) to be used may be specified by the specification, or higher layer signaling, physical layer signaling, or a combination thereof may be used for notification. ..
- Some SSB transmission candidate positions may be invalid.
- the skipped SSB index that is, the bit corresponding to '0' and the bit that comes with '1' comes later
- SSB index an SSB index that is QCL with this
- the SSB index corresponding to the bit of “0” and corresponding to the bit of the same slot as the maximum SSB index and the SSB index of this and the QCL may be assumed to be invalid.
- the PO in the paging PDCCH monitoring operation on the NR-U carrier, may include the same number of PDCCH monitoring opportunities as the number of all valid SSB transmission candidate positions. That is, the number S of PDCCH monitoring opportunities in the PO described above with reference to FIG. 2 may be replaced with the number of valid SSB transmission candidate positions.
- the valid SSB transmission candidate position is an SSB index instructed to be transmitted by ssb-PositionsInBurst, and an SSB index assumed to be these SSB indexes and QCL included in the DRS transmission window, May be
- the number of valid SSB transmission candidate positions is assumed to be the number of SSB indexes indicated to be transmitted by ssb-PositionsInBurst and the SSBs and QCLs included in the DRS transmission window.
- the number of indexes and the total number may be used.
- the SSB indexes designated to be transmitted by ssb-PositionsInBurst are five SSB indexes #0 to #4. Further, 12 SSB indexes #6-#10, #12-#16 and #18-#19 are the SSB indexes #0-#4 and QCL in the DRS transmission window. Therefore, the number of valid SSB transmission candidate positions (valid SSB index) is 17.
- FIG. 9 is a diagram illustrating an example of a relationship between a PDCCH monitoring opportunity for paging and SSB according to an embodiment.
- S PDCCH monitoring opportunities correspond to different beams, respectively, whereas in FIG. 9, S PDCCH monitoring opportunities include PDCCH monitoring opportunities corresponding to the same beam (based on the same QCL assumption). The point is different.
- the QCL assumption between SSB indexes can be appropriately determined.
- the UE when supporting 8 or more as the number of SSB candidate positions (or in a cell in which 8 or more is used), the UE combines the payload of DMRS (or DMRS sequence) and PBCH with the SSB candidate position-specific index as the SSB index. Is being considered for getting by.
- the UE measures and reports the power or quality (eg, Synchronization Signal Reference Signal Received Power (SS-RSRP)) of neighboring cells in Radio Resource Management (RRM) measurement, It may be required to acquire the SSB index of each peripheral cell. Considering UE load, measurement delay, etc., it is preferable to avoid decoding the PBCH payload of each neighboring cell to obtain the SSB index.
- SS-RSRP Synchronization Signal Reference Signal Received Power
- RRM Radio Resource Management
- the UE acquires the effective SSB index based on the DMRS sequence of the PBCH.
- the PBCH DMRS sequence may be generated based on the effective SSB index.
- the effective SSB index can be specified based only on the DMRS, and thus the UE may omit PBCH decoding.
- the UE acquires the effective SSB index without acquiring the SSB index, and performs at least one of the RRM measurement and the cell acquisition, without acquiring the SSB index, for the detected predetermined cell and the neighboring cell having the same frequency as the predetermined cell. May be.
- the UE may use the effective SSB index as the SSB index (beam index) when reporting the power or quality of the neighboring cells in the RRM measurement.
- the maximum number of effective SSB indexes may be determined by the specifications, or may be notified by higher layer signaling or the like.
- the UE may assume that the same effective SSB index may be used at different SSB candidate positions (position indexes) within the DRS transmission window.
- the UE includes information for deriving the frame timing (or half frame timing) in the PBCH payload and transmits the common PBCH payload over the SSB in the burst.
- the PBCH payloads of different SSBs in the SS burst are made common so that soft combining of the PBCH in the burst can be easily performed, and the detection characteristics of the PBCH are deteriorated and the detection delay is deteriorated. Can be prevented.
- the payload of the PBCH transmitted within the DRS transmission window may include at least one of the following (1) and (2): (1) Information about how many SSB candidate positions (position indexes) the same effective SSB index repeats (or offset information from the start position index of the SSB burst to the position index at which the execution SSB index 0 is transmitted) Good), (2) Information on the SSB candidate position index that started the SSB burst transmission.
- the UE may derive the frame timing based on the effective SSB index obtained from the DMRS sequence of the PBCH and at least one of the information (1) and (2). Note that half frame index information that has been conventionally used may be used in deriving the frame timing.
- the information in (1) above is, for example, information on the number of effective transmission SSB indexes, information on the maximum value of effective SSB indexes, information on the cycle of effective SSB indexes, wrap around (or wrapping around). ) Unit information, SSB repeat transmission unit information, SSB burst length information, and the like. Note that wraparound may mean that an index such as the effective SSB index returns to 0 after reaching the maximum value.
- the information in (2) above may be called, for example, a burst start SSB candidate position index or a burst start position index.
- the UE identifies (determines) the position index corresponding to the effective SSB index within the DRS transmission window for the detected cell and the neighboring cells of the same frequency (at least the cells of the same operator) based on the number of the transmission effective SSB indexes. You may.
- the UE may identify (determine) the half frame timing of the detected cell and the peripheral cells of the same frequency based on the burst start position index.
- the half frame timing, the frame timing, the slot timing, etc. may be read as each other.
- the number of transmission effective SSB indexes and the burst start position index are the same within one DRS transmission window. Therefore, these pieces of information may be included in the MIB of the PBCH payload and notified to the UE, or may be notified to the UE of the PBCH payload as information other than the MIB.
- the contents of the PBCH are the same in the PBCH transmission period (PBCH Transmission Time Interval (PBCH TTI)), so the UE can combine and receive each PBCH in the PBCH transmission period.
- PBCH TTI PBCH Transmission Time Interval
- the quality can be improved.
- the PBCH TTI may be 40 ms, 80 ms, or the like, for example.
- the information on the number of transmission effective SSB indexes is not limited to PBCH or MIB, and may be notified to the UE using at least one of SIB (for example, SIB1) and RRC signaling.
- SIB for example, SIB1
- RRC Radio Resource Control
- the UE may assume a predetermined value defined by the specifications as the number of the transmission effective SSB indexes in the initial access.
- the UE derives the effective SSB index (in other words, the PBCH DMRS pattern) by using the combined reception over the DRS transmission cycle or the SSB transmission cycle, the number of the transmission effective SSB indexes is predetermined. This is because it is preferable that the processing can be performed assuming that the value is.
- the UE may assume that the SSB index notified using ssb-PositionsInBurst means the effective SSB index.
- 10A-10C and 11A-11C are diagrams showing an example of specifying the effective SSB index according to the embodiment.
- a case of using the effective SSB indexes #0 to #3 will be described. That is, the number of effective transmission SSB indexes (length of SSB burst) is 4.
- the base station succeeds in the LBT from the beginning within the DRS transmission window, and uses the effective SSB indexes #0, #1, #2 and #3 to respectively position indexes #0, #1, #2 and.
- the SSB is transmitted in #3.
- SSB is not transmitted due to LBT failure.
- the base station uses the effective SSB indexes #1, #2, #3 and #0 to transmit the SSB at the position indexes #1, #2, #3 and #4, respectively.
- SSB is not transmitted due to LBT failure.
- the base station uses the effective SSB indexes #2, #3, #0 and #1 to transmit SSB at position indexes #2, #3, #4 and #5, respectively.
- SSB is not transmitted due to LBT failure at position indexes #0-#2.
- the base station uses the effective SSB indexes #3, #0, #1 and #2 to transmit the SSB at the position indexes #3, #4, #5 and #6, respectively.
- SSB is not transmitted due to LBT failure.
- the base station uses the effective SSB indexes #0, #1, #2 and #3 to transmit the SSB at the position indexes #4, #5, #6 and #7, respectively.
- SSB is not transmitted due to LBT failure at position indexes #0 to #13.
- the base station uses the effective SSB indexes #2, #3, #0 and #1 to transmit SSB at position indexes #14, #15, #16 and #17, respectively.
- the UE When the UE detects the SSB, the UE decodes the PBCH and grasps the burst start position index and the transmission effective SSB index number (or the above offset). The UE may derive the effective SSB index based on the number of transmission effective SSB indexes (or the offset) and the DMRS sequence of the PBCH included in the SSB.
- the UE may also specify the position index of the detected SSB based on the effective SSB index and the burst start position index. Then, the UE may derive the frame timing based on the position index of the SSB.
- the UE determines that the SSB burst as shown in FIG. 11C is transmitted. Can be assumed. Moreover, when the effective SSB index #3 is acquired and the burst start position index indicated by the decoded PBCH is #1, the UE can be assumed to have transmitted the SSB burst as shown in FIG. 10B.
- the effective SSB index of each SSB in the SSB burst is #0. , #1, #2, etc. need to be different. This is because if the same effective SSB index is present in the SSB burst, the frame timing cannot be specified. Therefore, it is possible that SSBs with different effective SSB indices are using the same beam (that is, QCL).
- information regarding the QCL relationship between different effective SSB indexes may be notified to the UE using higher layer signaling (eg, SIB, RRC signaling, etc.), physical layer signaling (eg, DCI), or a combination thereof. ..
- higher layer signaling eg, SIB, RRC signaling, etc.
- physical layer signaling eg, DCI
- the UE may determine whether to apply the same QCL assumption for different effective SSB indices, apply different QCL assumptions, and so on.
- the UE side can also grasp this and average the measurement results of a plurality of SSBs based on the same beam in the SSB burst.
- the QCL assumption between SSB indexes can be appropriately determined. Further, the UE can appropriately derive the frame timing based on the PBCH of the SSB.
- wireless communication system Wireless communication system
- communication is performed using any one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.
- FIG. 12 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 may be a system that realizes communication by using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
- the wireless communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs).
- MR-DC has dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) with LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and dual connectivity (NR-E) with NR and LTE.
- E-UTRA-NR Dual Connectivity EN-DC
- NR-E Dual Connectivity
- NE-DC Dual Connectivity
- the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)).
- the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations within the same RAT (eg, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) may be supported.
- a plurality of base stations within the same RAT eg, dual connectivity (NR-NR Dual Connectivity (NN-DC)
- N-DC dual connectivity
- MN and SN are NR base stations (gNB).
- the wireless communication system 1 includes a base station 11 forming a macro cell C1 having a relatively wide coverage and a base station 12 (12a-12c) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. You may prepare.
- the user terminal 20 may be located in at least one cell. The arrangement and number of each cell and user terminal 20 are not limited to those shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
- the user terminal 20 may be connected to at least one of the plurality of base stations 10.
- the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) using a plurality of component carriers (Component Carrier (CC)) and dual connectivity (DC).
- CA Carrier Aggregation
- CC Component Carrier
- DC dual connectivity
- Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
- the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
- FR1 may be in a frequency band of 6 GHz or less (sub-6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
- the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
- the user terminal 20 may communicate with each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station is the Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is the IAB. It may be called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include at least one of, for example, Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.
- an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) based wireless access method may be used. For example, on at least one of downlink (Downlink (DL)) and uplink (Uplink (UL)), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- the wireless access method may be called a waveform.
- other wireless access methods eg, other single carrier transmission method, other multicarrier transmission method
- the UL and DL wireless access methods may be used as the UL and DL wireless access methods.
- downlink shared channels Physical Downlink Shared Channel (PDSCH)
- broadcast channels Physical Broadcast Channel (PBCH)
- downlink control channels Physical Downlink Control
- an uplink shared channel Physical Uplink Shared Channel (PUSCH)
- an uplink control channel Physical Uplink Control Channel (PUCCH)
- a random access channel that are shared by each user terminal 20.
- Physical Random Access Channel (PRACH) Physical Random Access Channel
- User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
- User data, upper layer control information, and the like may be transmitted by the PUSCH.
- the Master Information Block (MIB) may be transmitted by the PBCH.
- Lower layer control information may be transmitted by PDCCH.
- the lower layer control information may include downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH, for example.
- DCI Downlink Control Information
- the DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc.
- the DCI for scheduling PUSCH may be called UL grant, UL DCI, etc.
- PDSCH may be replaced with DL data
- PUSCH may be replaced with UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect the PDCCH.
- CORESET corresponds to a resource for searching DCI.
- the search space corresponds to the search area and the search method of the PDCCH candidates (PDCCH candidates).
- a CORESET may be associated with one or more search spaces. The UE may monitor CORESET associated with a search space based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set. Note that the “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
- channel state information (Channel State Information (CSI)
- delivery confirmation information for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
- scheduling request (Scheduling Request (Scheduling Request ( Uplink Control Information (UCI) including at least one of (SR))
- CSI Channel State Information
- HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
- ACK/NACK ACK/NACK
- scheduling request Scheduling Request (Scheduling Request ( Uplink Control Information (UCI) including at least one of (SR)
- a random access preamble for establishing a connection with a cell may be transmitted by the PRACH.
- downlink, uplink, etc. may be expressed without adding “link”. Further, it may be expressed without adding "Physical" to the head of each channel.
- a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may be transmitted.
- a cell-specific reference signal Cell-specific Reference Signal (CRS)
- a channel state information reference signal Channel State Information Reference Signal (CSI-RS)
- CSI-RS Channel State Information Reference Signal
- DMRS Demodulation reference signal
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)), for example.
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS block (SSB), or the like. Note that SS and SSB may also be referred to as reference signals.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS Uplink Reference Signal
- UE-specific Reference Signal UE-specific Reference Signal
- FIG. 13 is a diagram illustrating an example of the configuration of the base station according to the embodiment.
- the base station 10 includes a control unit 110, a transmission/reception unit 120, a transmission/reception antenna 130, and a transmission line interface 140. It should be noted that the control unit 110, the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140 may each be provided with one or more.
- the functional blocks of the characteristic part in the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be configured by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
- the control unit 110 may control transmission/reception using the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140, measurement, and the like.
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer the generated data to the transmission/reception unit 120.
- the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, wireless resource management, and the like.
- the transmission/reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
- the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
- the transmission/reception unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission/reception circuit, etc., which are explained based on common recognition in the technical field of the present disclosure. be able to.
- the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit.
- the transmission unit may include a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may include a reception processing unit 1212, an RF unit 122, and a measuring unit 123.
- the transmission/reception antenna 130 can be configured by an antenna described based on common recognition in the technical field of the present disclosure, for example, an array antenna or the like.
- the transmitter/receiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission/reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission/reception unit 120 processes the Packet Data Convergence Protocol (PDCP) layer and the Radio Link Control (RLC) layer (for example, for the data and control information acquired from the control unit 110) (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- the transmission/reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) on the bit string to be transmitted. Processing (if necessary), inverse fast Fourier transform (Inverse Fast Transform (IFFT)) processing, precoding, digital-analog conversion, and other transmission processing may be performed to output the baseband signal.
- channel coding may include error correction coding
- modulation modulation
- mapping mapping, filtering
- DFT discrete Fourier transform
- IFFT inverse fast Fourier transform
- precoding coding
- digital-analog conversion digital-analog conversion
- the transmitting/receiving unit 120 may modulate the baseband signal into a radio frequency band, perform filtering, amplifying, etc., and transmit the radio frequency band signal via the transmission/reception antenna 130. ..
- the transmission/reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc., on the signal in the radio frequency band received by the transmission/reception antenna 130.
- the transmission/reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (Fast Fourier Transform (FFT)) processing, and inverse discrete Fourier transform (Inverse Discrete Fourier Transform (IDFT)) on the acquired baseband signal. )) Applying reception processing such as processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, User data may be acquired.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier Transform
- the transmission/reception unit 120 may perform measurement on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
- the measurement unit 123 receives power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
- Signal strength for example, Received Signal Strength Indicator (RSSI)
- channel information for example, CSI
- the measurement result may be output to the control unit 110.
- the transmission line interface 140 transmits/receives signals (backhaul signaling) to/from devices included in the core network 30, other base stations 10, and the like, and user data (user plane data) for the user terminal 20 and a control plane. Data or the like may be acquired or transmitted.
- the transmission unit and the reception unit of the base station 10 may be configured by at least one of the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140.
- the transmission/reception unit 120 informs the user terminal 20 about the position of the synchronization signal block (Synchronization Signal Block (SSB)) in the synchronization signal (Synchronization Signal (SS)) burst (for example, the upper layer parameter “ssb- PositionsInBurst”).
- SSB Synchronization Signal Block
- SS Synchronization Signal
- the transmitting/receiving unit 120 may transmit SSB, DRS, etc.
- FIG. 14 is a diagram illustrating an example of the configuration of the user terminal according to the embodiment.
- the user terminal 20 includes a control unit 210, a transmission/reception unit 220, and a transmission/reception antenna 230. Note that each of the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more.
- the functional blocks of the characteristic part in the present embodiment are mainly shown, and the user terminal 20 may be assumed to also have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be configured by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission/reception, measurement, and the like using the transmission/reception unit 220 and the transmission/reception antenna 230.
- the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer the data to the transmission/reception unit 220.
- the transmission/reception unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223.
- the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
- the transmitter/receiver 220 may include a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter/receiver circuit, and the like, which are described based on common recognition in the technical field of the present disclosure.
- the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit.
- the transmission unit may include a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may include a reception processing unit 2212, an RF unit 222, and a measuring unit 223.
- the transmission/reception antenna 230 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.
- the transmitter/receiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission/reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission/reception unit 220 processes the PDCP layer, the RLC layer (for example, RLC retransmission control), and the MAC layer (for example, for the data and control information acquired from the control unit 210). , HARQ retransmission control) may be performed to generate a bit string to be transmitted.
- the transmission/reception unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing on the bit string to be transmitted.
- the baseband signal may be output by performing transmission processing such as precoding, digital-analog conversion, or the like.
- the transmission/reception unit 220 transmits the channel using the DFT-s-OFDM waveform when transform precoding is enabled for the channel (for example, PUSCH).
- the DFT process may be performed as the transmission process, or otherwise, the DFT process may not be performed as the transmission process.
- the transmission/reception unit 220 may modulate the baseband signal into a radio frequency band, perform filtering, amplification, etc., and transmit the radio frequency band signal via the transmission/reception antenna 230. ..
- the transmission/reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc., on the signal in the radio frequency band received by the transmission/reception antenna 230.
- the transmission/reception unit 220 (reception processing unit 2212) performs analog-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (error correction) on the acquired baseband signal.
- User data and the like may be acquired by applying reception processing such as MAC layer processing, RLC layer processing, and PDCP layer processing.
- the transmission/reception unit 220 may perform measurement on the received signal.
- the measurement unit 223 may perform RRM measurement, CSI measurement, and the like based on the received signal.
- the measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmission unit and the reception unit of the user terminal 20 may be configured by at least one of the transmission/reception unit 220 and the transmission/reception antenna 230.
- the transmission/reception unit 220 receives information (for example, the upper layer parameter “ssb-PositionsInBurst”) regarding the position of the synchronization signal block (Synchronization Signal Block (SSB)) in the synchronization signal (Synchronization Signal (SS)) burst. Good.
- the information may be notified using, for example, at least one of System Information Block 1 (SIB1) and RRC signaling.
- SIB1 System Information Block 1
- RRC Radio Resource Control
- the control unit 210 based on the information about the position of the SSB in the SS burst, Quasi-between SSB indices in the transmission window of the discovery reference signal (DRS) in the carrier to which listening is applied (for example, an unlicensed carrier). Co-Location (QCL) assumptions may be determined.
- DRS discovery reference signal
- the carrier to which listening is applied may be called an LAA cell, an LAA secondary cell (LAA SCell), or the like.
- the user terminal 20 may listen before transmitting.
- the “listening” of the present disclosure may be read as at least one of Listen Before Talk (LBT), Clear Channel Assessment (CCA), carrier sense, sensing, channel sensing, channel access operation, and the like.
- LBT Listen Before Talk
- CCA Clear Channel Assessment
- carrier sense sensing, channel sensing, channel access operation, and the like.
- the control unit 210 determines that the SSB corresponding to each SSB index up to the slot including the SSB corresponding to the maximum SSB index notified by the information regarding the position of the SSB in the SS burst is the SSB index of the slot after the slot. It may be assumed that the SSB corresponding to the above and the QCL are in order.
- the control unit 210 assumes that, within the DRS transmission window, the QCL assumption of the SSB index is repeatedly used for each period from the first slot of ssb-PositionsInBurst to the slot containing the SSB corresponding to the maximum SSB index. May be.
- the control unit 210 may assume that the QCL assumption for each period is applied from the slot next to the slot including the SSB corresponding to the maximum SSB index.
- the control unit 210 may regard an SSB index larger than the maximum SSB index as invalid in the slot including the SSB corresponding to the maximum SSB index (not counting as the number of SSB actually transmitted). Good).
- the control unit 210 is notified of the number of Physical Downlink Control Channel (PDCCH) monitoring opportunities for paging included in the paging opportunity in the carrier to which the listening is applied, by information regarding the position of the SSB in the SS burst, It may be assumed that the determination is made based on the sum of the number of one or more SSB indexes transmitted and the number of the one or more SSB indexes and the number of QCL SSB indexes.
- PDCCH Physical Downlink Control Channel
- the control unit 210 makes QCL assumptions of the PDCCH and SSB in the PDCCH monitoring opportunity for receiving at least one of other system information (Other System Information (OSI)) and paging based on various QCL assumptions. You may judge and monitor (or receive) the said PDCCH.
- OSI Operating System Information
- the OSI and paging may be replaced with other information (for example, a specific DCI format).
- the transmitter/receiver 220 may receive (or detect) the SSB.
- the controller 210 may acquire the effective SSB index based on the DMRS of the PBCH included in the SSB. In this case, the control unit 210 may omit the acquisition of the SSB index for the SSB, and may omit the decoding of the PBCH, for example.
- the control unit 210 obtains, from the payload of the PBCH, at least one of information on the number of the effective SSB indexes to be transmitted and a start position index of an SSB burst including the SSB within a DRS transmission window from the payload of the PBCH. You may.
- the control unit 210 may apply soft combining to the decoding of the plurality of PBCHs in the SSB burst.
- the transmitter/receiver 220 may combine and receive a plurality of the PBCHs in the SSB burst.
- each functional block may be realized by using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.) and may be implemented using these multiple devices.
- the functional block may be implemented by combining the one device or the plurality of devices with software.
- the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting (notifying), notifying (communicating), forwarding (forwarding), configuring (reconfiguring), allocating (allocating, mapping), assigning, etc.
- a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the implementation method is not particularly limited.
- the base station, the user terminal, and the like may function as a computer that performs the process of the wireless communication method of the present disclosure.
- FIG. 15 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.
- the base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
- the terms such as a device, a circuit, a device, a section, and a unit can be read as each other.
- the hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
- processor 1001 For example, only one processor 1001 is shown, but there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or by using another method.
- the processor 1001 may be mounted by one or more chips.
- the processor 1001 For each function in the base station 10 and the user terminal 20, for example, by causing a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the memory 1002, the processor 1001 performs calculation and communication via the communication device 1004. Is controlled, and at least one of reading and writing of data in the memory 1002 and the storage 1003 is controlled.
- a predetermined software program
- the processor 1001 operates an operating system to control the entire computer, for example.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
- CPU central processing unit
- the control unit 110 (210) and the transmission/reception unit 120 (220) described above may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program code
- the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized similarly for other functional blocks.
- the memory 1002 is a computer-readable recording medium, and for example, at least Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other appropriate storage media. It may be configured by one.
- the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 may store an executable program (program code), a software module, etc. for implementing the wireless communication method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, and/or other suitable storage medium May be configured by The storage 1003 may be called an auxiliary storage device.
- a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, and/or other suitable storage medium May be configured by
- the storage 1003
- the communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 for example, realizes at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. May be included.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission/reception unit 120 (220) and the transmission/reception antenna 130 (230) described above may be realized by the communication device 1004.
- the transmitter/receiver 120 (220) may be physically or logically separated from the transmitter 120a (220a) and the receiver 120b (220b).
- 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, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside.
- the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses for each device.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and part or all of each functional block may be realized by using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.
- DSP digital signal processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- CMOS complementary metal-oxide-semiconductor
- CC component carrier
- a radio frame may be composed of one or a plurality of periods (frames) in the time domain.
- Each of the one or more periods (frames) forming the radio frame may be referred to as a subframe.
- a subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (for example, 1 ms) that does not depend on the numerology.
- the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
- the numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and radio frame configuration. , At least one of a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like.
- a slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
- the slot may be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may be composed of one or more symbols in the time domain. The minislot may also be called a subslot. Minislots may be configured with fewer symbols than slots.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be referred to as PDSCH (PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
- Radio frame, subframe, slot, minislot, and symbol all represent the time unit for signal transmission. Radio frames, subframes, slots, minislots, and symbols may have different names corresponding to them. It should be noted that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.
- one subframe may be called a TTI
- a plurality of consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. May be
- the unit representing the TTI may be called a slot, a minislot, etc. instead of a subframe.
- TTI means, for example, a minimum time unit of scheduling in wireless communication.
- the base station performs scheduling to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) to each user terminal in units of TTI.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit of a channel-encoded data packet (transport block), code block, codeword, or the like, or may be a processing unit of scheduling, link adaptation, or the like.
- the time interval for example, the number of symbols
- the transport block, code block, codeword, etc. may be shorter than the TTI.
- one slot or one minislot is called a TTI
- one or more TTIs may be the minimum time unit for scheduling.
- the number of slots (the number of mini-slots) forming the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and a short TTI (eg, 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.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more continuous subcarriers in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
- the number of subcarriers included in the RB may be determined based on numerology.
- the RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may be configured by one or a plurality of resource blocks.
- One or more RBs are physical resource blocks (Physical RB (PRB)), subcarrier groups (Sub-Carrier Group (SCG)), resource element groups (Resource Element Group (REG)), PRB pairs, RBs. It may be called a pair or the like.
- PRB Physical RB
- SCG Sub-Carrier Group
- REG Resource Element Group
- a resource block may be composed of one or more resource elements (Resource Element (RE)).
- RE resource elements
- 1 RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth Part (may be called partial bandwidth etc.) represents a subset of consecutive common RBs (common resource blocks) for a certain neurology in a certain carrier. Good.
- the common RB may be specified by the index of the RB based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within the BWP.
- BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP for UL UL BWP
- BWP for DL DL BWP
- one or more BWPs may be set in one carrier.
- At least one of the configured BWPs may be active, and the UE does not have to expect to send and receive a given signal/channel outside the active BWP.
- “cell”, “carrier”, and the like in the present disclosure may be read as “BWP”.
- the structure of the radio frame, subframe, slot, minislot, symbol, etc. described above is merely an example.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, and included in RBs The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.
- the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented.
- the radio resource may be indicated by a predetermined index.
- the names used for parameters and the like in the present disclosure are not limited names in any respect. Further, the mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements are not limiting in any way. ..
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of
- Information and signals can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer.
- Information, signals, etc. may be input/output via a plurality of network nodes.
- Input/output information, signals, etc. may be stored in a specific location (for example, memory), or may be managed using a management table. Information input/output, signals, etc. may be overwritten, updated, or added. The output information, signal, etc. may be deleted. The input information, signal, etc. may be transmitted to another device.
- a specific location for example, memory
- Information input/output, signals, etc. may be overwritten, updated, or added.
- the output information, signal, etc. may be deleted.
- the input information, signal, etc. may be transmitted to another device.
- notification of information is not limited to the aspect/embodiment described in the present disclosure, and may be performed using another method.
- notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), upper layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (Master Information Block (MIB)), system information block (System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof May be implemented by.
- DCI Downlink Control Information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
- the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- the MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
- CE MAC Control Element
- the notification of the predetermined information is not limited to the explicit notification, and may be implicitly (for example, by not notifying the predetermined information or another information). May be carried out).
- the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false. , May be performed by comparison of numerical values (for example, comparison with a predetermined value).
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the software uses at least one of wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) , Servers, or other remote sources, these wired and/or wireless technologies are included within the definition of transmission media.
- Network may mean a device (eg, a base station) included in the network.
- precoding “precoding”, “precoder”, “weight (precoding weight)”, “pseudo-collocation (Quasi-Co-Location (QCL))”, “Transmission Configuration Indication state (TCI state)”, “space” “Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, and “panel” are interchangeable. Can be used for
- base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission Point (TP)", “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
- Cell Cell
- femto cell femto cell
- pico cell femto cell
- a base station can accommodate one or more (eg, 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 defined by a base station subsystem (for example, a small indoor base station (Remote Radio Head (RRH))) to provide communication services.
- a base station subsystem for example, a small indoor base station (Remote Radio Head (RRH))
- RRH Remote Radio Head
- the term "cell” or “sector” refers to part or all of the coverage area of a base station and/or a base station subsystem providing communication services in this coverage.
- MS Mobile Station
- UE User Equipment
- a mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless 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 wireless communication device, or the like.
- 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 (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned type or unmanned type).
- At least one of the base station and the mobile station also 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 Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be replaced by the user terminal.
- the communication between the base station and the user terminal is replaced with communication between a plurality of user terminals (eg, may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- each aspect/embodiment of the present disclosure may be applied.
- the user terminal 20 may have the function of the base station 10 described above.
- the words such as “up” and “down” may be replaced with the words corresponding to the terminal-to-terminal communication (for example, “side”).
- the uplink channel and the downlink channel may be replaced with the side channel.
- the user terminal in the present disclosure may be replaced by the base station.
- the base station 10 may have the function of the user terminal 20 described above.
- the operation supposed to be performed by the base station may be performed by its upper node in some cases.
- various operations performed for communication with a terminal include a base station and one or more network nodes other than the base station (for example, Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. are conceivable, but not limited to these) or a combination of these is clear.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect/embodiment described in the present disclosure may be used alone, in combination, or may be switched according to execution. Further, the order of the processing procedure, sequence, flowchart, etc. of each aspect/embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps in a sample order, and are not limited to the specific order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- Future Radio Access FAA
- New-Radio Access Technology RAT
- NR New Radio
- NX New radio access
- FX Future generation radio access
- GSM Global System for Mobile communications
- CDMA2000 CDMA2000
- Ultra Mobile Broadband UMB
- IEEE 802.11 Wi-Fi (registered trademark)
- IEEE 802.16 WiMAX (registered trademark)
- Ultra-WideBand (UWB), Bluetooth (registered trademark), a system using any other suitable wireless communication method, and a next-generation system extended based on these may be applied.
- a plurality of systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G).
- the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase “based on” means both "based only on” and “based at least on.”
- references to elements using designations such as “first”, “second”, etc. used in this disclosure does not generally limit the amount or order of those elements. These designations may be used in this 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 employed or that the first element must precede the second element in any way.
- determining may encompass a wide variety of actions.
- judgment means “judging", “calculating”, “computing”, “processing”, “deriving”, “investigating”, “searching” (looking up, search, inquiry) ( For example, it may be considered to be a “decision” for a search in a table, database or another data structure), ascertaining, etc.
- “decision (decision)” includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), access ( Accessing) (e.g., accessing data in memory) and the like may be considered to be a “decision.”
- judgment (decision) is considered to be “judgment (decision)” such as resolving, selecting, choosing, choosing, establishing, establishing, and comparing. Good. That is, “determination (decision)” may be regarded as “determination (decision)” of some operation.
- connection refers to any direct or indirect connection or coupling between two or more elements. And can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the connections or connections between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
- radio frequency domain microwave Regions
- electromagnetic energy having wavelengths in the light (both visible and invisible) region, etc. can be used to be considered “connected” or “coupled” to each other.
- 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”.
- the terms “remove”, “coupled” and the like may be construed similarly as “different”.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
Description
アンライセンスバンド(例えば、2.4GHz帯、5GHz帯、6GHz帯)では、例えば、Wi-Fiシステム、LAAをサポートするシステム(LAAシステム)等の複数のシステムが共存することが想定されるため、当該複数のシステム間での送信の衝突回避及び/又は干渉制御が必要となると考えられる。
NRでは、同期信号/ブロードキャストチャネル(Synchronization Signal/Physical Broadcast Channel(SS/PBCH))ブロックが利用される。SS/PBCHブロックは、プライマリ同期信号(Primary Synchronization Signal(PSS))、セカンダリ同期信号(Secondary Synchronization Signal(SSS))及びブロードキャストチャネル(Physical Broadcast Channel(PBCH))(及びPBCH用の復調用参照信号(DeModulation Reference Signal(DMRS)))を含む信号ブロックであってもよい。SS/PBCHブロックは、同期信号ブロック(Synchronization Signal Block(SSB))と呼ばれてもよい。
NR-Uでも、SSBを用いることが検討されている。また、1つの連続するバースト信号内の、Channel State Information(CSI)-Reference Signal(RS)と、SSBバーストセット(SSBのセット)と、SSBに関連付けられたCORESET及びPDSCHと、を含む信号が検討されている。この信号は、発見参照信号(Discovery Reference Signal(DRS)、NR-U DRSなど)、発見用参照信号、発見信号(Discovery Signal(DS))などと呼ばれてもよい。
<第1の実施形態>
一実施形態では、NR-UキャリアにおけるSSBインデックス間のQCL想定を、仕様及び上位レイヤシグナリングによって決定してもよい。例えば、UEは、所定の上位レイヤパラメータ(例えば、ssb-PositionsInBurst)によって示される最大のSSBインデックスに対応するSSBが含まれるスロットまでの各SSBインデックスが、当該スロット以降のスロットのSSBインデックスに対応するSSBと、順番通りにQCLだと想定してもよい。
上述のssb-PositionsInBurstは、SIB1又はRRCシグナリングを用いてUEに通知される。このため、ssb-PositionsInBurstを利用できない場合(例えば、初期アクセス時)には、上述の方法では異なるSSB候補位置間に関するQCLの想定が難しい。
(1)同一の実効SSBインデックスが、いくつのSSB候補位置(位置インデックス)毎に繰り返すかの情報(あるいはSSBバーストの開始位置インデックスから、実行SSBインデックス0が送信される位置インデックスまでのオフセット情報でもよい)、
(2)SSBバーストの送信を開始したSSB候補位置インデックスの情報。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図13は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図14は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、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。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (3)
- 同期信号ブロック(Synchronization Signal Block(SSB))を受信する受信部と、
前記SSBに含まれるブロードキャストチャネル(Physical Broadcast Channel(PBCH))の復調用参照信号(DeModulation Reference Signal(DMRS))に基づいて、実効SSBインデックスを取得し、前記PBCHのペイロードから、送信される前記実効SSBインデックスの数の情報、及び発見参照信号(Discovery Reference Signal(DRS))送信ウィンドウ内における前記SSBを含むSSBバーストの開始位置インデックスの少なくとも一方を取得する制御部と、を有することを特徴とするユーザ端末。 - 前記制御部は、前記SSBバースト内の複数の前記PBCHの復号にソフトコンバイニングを適用することを特徴とする請求項1に記載のユーザ端末。
- 同期信号ブロック(Synchronization Signal Block(SSB))を受信するステップと、
前記SSBに含まれるブロードキャストチャネル(Physical Broadcast Channel(PBCH))の復調用参照信号(DeModulation Reference Signal(DMRS))に基づいて、実効SSBインデックスを取得し、前記PBCHのペイロードから、送信される前記実効SSBインデックスの数の情報、及び発見参照信号(Discovery Reference Signal(DRS))送信ウィンドウ内における前記SSBを含むSSBバーストの開始位置インデックスの少なくとも一方を取得するステップと、を有することを特徴とするユーザ端末の無線通信方法。
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022082767A1 (zh) * | 2020-10-23 | 2022-04-28 | 华为技术有限公司 | 一种通信方法及相关设备 |
JP2022528236A (ja) * | 2019-03-29 | 2022-06-09 | 維沃移動通信有限公司 | Ssb伝送指示方法、装置、端末、機器及び媒体 |
JP2022531078A (ja) * | 2019-04-30 | 2022-07-06 | 富士通株式会社 | Ssbに基づく測定方法及び装置 |
KR102422258B1 (ko) * | 2021-02-23 | 2022-07-19 | 컨버즈 주식회사 | 중계기의 안테나 빔 제어를 통한 전파성능 향상장치 |
WO2022205481A1 (zh) * | 2021-04-02 | 2022-10-06 | Oppo广东移动通信有限公司 | 无线通信方法、第一设备和第二设备 |
WO2023028932A1 (en) * | 2021-09-02 | 2023-03-09 | Qualcomm Incorporated | Physical downlink control channel monitoring occasion selection |
WO2023073963A1 (ja) * | 2021-10-29 | 2023-05-04 | 株式会社Nttドコモ | 基地局及び通信方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111294943B (zh) * | 2019-03-29 | 2022-08-12 | 展讯通信(上海)有限公司 | 确定pdcch监测时机的方法及装置、存储介质、终端、基站 |
US11889464B2 (en) * | 2020-07-21 | 2024-01-30 | Qualcomm Incorporated | Reliable paging and short message transmission with repetition |
US20220361125A1 (en) * | 2021-05-04 | 2022-11-10 | Qualcomm Incorporated | Synchronization signal block burst with multiple subsets |
WO2024026898A1 (zh) * | 2022-08-05 | 2024-02-08 | 富士通株式会社 | 信息处理方法、信息收发方法和装置 |
WO2024036421A1 (en) * | 2022-08-14 | 2024-02-22 | Zte Corporation | Coverage enhancement |
WO2024093394A1 (en) * | 2023-07-26 | 2024-05-10 | Lenovo (Beijing) Limited | Retrieval of system information |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019021490A1 (ja) * | 2017-07-28 | 2019-01-31 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MY193842A (en) * | 2016-01-15 | 2022-10-28 | Ntt Docomo Inc | User terminal, radio base station and radio communication method |
WO2018025908A1 (ja) * | 2016-08-03 | 2018-02-08 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
CN108810983B (zh) * | 2017-05-05 | 2021-07-09 | 华为技术有限公司 | 发送和接收信息的方法、网络设备和终端设备 |
CN109565345B (zh) * | 2017-05-05 | 2021-07-20 | Lg 电子株式会社 | 接收同步信号的方法及其装置 |
US10736063B2 (en) * | 2017-06-27 | 2020-08-04 | Qualcomm Incorporated | Neighbor cell synchronization signal block index determination |
EP4344334A3 (en) * | 2018-02-13 | 2024-06-05 | Samsung Electronics Co., Ltd. | Method and device for communicating synchronization signal |
EP3823198A4 (en) * | 2018-07-11 | 2021-08-04 | Beijing Xiaomi Mobile Software Co., Ltd. | METHODS AND DEVICES FOR SENDING AND RECEIVING A REFERENCE SIGNAL, BASE STATION AND USER DEVICE |
US11051234B2 (en) * | 2018-11-14 | 2021-06-29 | Qualcomm Incorporated | Control search space overlap indication |
JP7338688B2 (ja) * | 2019-01-11 | 2023-09-05 | 富士通株式会社 | データ伝送方法及び装置 |
US11991111B2 (en) * | 2019-01-11 | 2024-05-21 | Apple Inc. | Discovery reference signal design for quasi co-location and frame timing information in new radio user equipment |
-
2019
- 2019-02-14 JP JP2020572024A patent/JPWO2020166043A1/ja active Pending
- 2019-02-14 CN CN201980095413.3A patent/CN113711552B/zh active Active
- 2019-02-14 EP EP19915298.4A patent/EP3926907A4/en active Pending
- 2019-02-14 WO PCT/JP2019/005448 patent/WO2020166043A1/ja unknown
- 2019-02-14 KR KR1020217026623A patent/KR20210126024A/ko not_active Application Discontinuation
- 2019-02-14 US US17/430,499 patent/US20220263618A1/en active Pending
-
2023
- 2023-04-25 JP JP2023071376A patent/JP2023103279A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019021490A1 (ja) * | 2017-07-28 | 2019-01-31 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
Non-Patent Citations (8)
Title |
---|
3GPP TS 36.300 |
3GPP TS 38.213 |
3GPP TS 38.304 |
NTT DOCOMO, INC.: "Enhancements to initial access procedure for NR-U", 3GPP DRAFT; R1-1902790_ENHANCEMENTS TO INITIAL ACCESS PROCEDURE FOR NR-U_FINAL, 15 February 2019 (2019-02-15), Athens, Greece, pages 1 - 10, XP051600485 * |
NTT DOCOMO; INC: "Discussion on remaining details on NR-SS", 3GPP TSG RAN WG1 #90B R1-1718179, 3 October 2017 (2017-10-03), pages 1 - 5, XP051352887, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_90b/Docs/R1-1718179.zip> [retrieved on 20190401] * |
NTT DOCOMO; INC: "Enhancements to initial access procedure for NR-U", 3GPP TSG RAN WG1 AD-HOC MEETING 1901 R1-1900954, 12 January 2019 (2019-01-12), pages 1 - 9, XP051576490, Retrieved from the Internet <URL:https://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_AH/NR_AH_1901/Docs/R1-1900954.zip> [retrieved on 20190401] * |
See also references of EP3926907A4 |
VIVO: "Views on NR-PBCH contents and payload size", 3GPP TSGRANWG1 ADHOC_NR_AH_1706 R1-1710375, 17 June 2017 (2017-06-17), pages 1 - 5, XP051304982, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_AH/NR_AH_1706/Docs/R1-1710375.zip> [retrieved on 20190401] * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022528236A (ja) * | 2019-03-29 | 2022-06-09 | 維沃移動通信有限公司 | Ssb伝送指示方法、装置、端末、機器及び媒体 |
JP7271711B2 (ja) | 2019-03-29 | 2023-05-11 | 維沃移動通信有限公司 | Ssb伝送指示方法、装置、端末、機器及び媒体 |
US12063606B2 (en) | 2019-03-29 | 2024-08-13 | Vivo Mobile Communication Co., Ltd. | SSB transmission indication method and apparatus, terminal, device, and medium |
JP2022531078A (ja) * | 2019-04-30 | 2022-07-06 | 富士通株式会社 | Ssbに基づく測定方法及び装置 |
JP7342970B2 (ja) | 2019-04-30 | 2023-09-12 | 富士通株式会社 | Ssbに基づく測定方法及び装置 |
WO2022082767A1 (zh) * | 2020-10-23 | 2022-04-28 | 华为技术有限公司 | 一种通信方法及相关设备 |
KR102422258B1 (ko) * | 2021-02-23 | 2022-07-19 | 컨버즈 주식회사 | 중계기의 안테나 빔 제어를 통한 전파성능 향상장치 |
WO2022205481A1 (zh) * | 2021-04-02 | 2022-10-06 | Oppo广东移动通信有限公司 | 无线通信方法、第一设备和第二设备 |
WO2023028932A1 (en) * | 2021-09-02 | 2023-03-09 | Qualcomm Incorporated | Physical downlink control channel monitoring occasion selection |
WO2023073963A1 (ja) * | 2021-10-29 | 2023-05-04 | 株式会社Nttドコモ | 基地局及び通信方法 |
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