Terminal, base station, and wireless communication method

Abstract

Provided is a terminal that shares a frequency with a radio access technology of a first generation and supports a radio access technology of a second generation succeeding the first generation. The terminal comprises: a communication unit that receives a synchronization signal and / or control information in the radio access technology of the second generation transmitted at a specific transmission timing; and a control unit that controls communication in the radio access technology of the second generation on the basis of the synchronization signal and / or the control information.

Description

Terminal, base station, and wireless communication method

[0001] The present disclosure relates to a terminal, a base station, and a wireless communication method.

[0002] The 3rd Generation Partnership Project (3GPP) has developed specifications for the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation 10 (NG)), and is also developing specifications for the next generation of mobile communication systems, known as Beyond 5G, 5G Evolution, or 6G.

[0003] In Release 15, dynamic spectrum sharing (DSS) was proposed to share frequencies between multiple wireless communication technologies, and from Release 15 to Release 18, enhancements were made to DSS as a technique for sharing frequencies between LTE and NR (for example, Non-Patent Document 1).

[0004] “Summary of Rel17 WI on NR Dynamic spectrum sharing (DSS)”, RP-220464, 3GPP TSG RAN Meeting #95-e, March 17-23, 2022

[0005] However, when frequency sharing is carried out in generations subsequent to 5G, there is a possibility that interference may occur.

[0006] One aspect of the present disclosure provides a terminal, a base station, and a wireless communication method that can avoid interference when frequency sharing is carried out in generations subsequent to 5G.

[0007] A terminal according to one aspect of the present disclosure is a terminal that shares frequencies with a first generation radio access technology and supports a second generation radio access technology that is a successor to the first generation, and includes a communication unit that receives synchronization signals and / or control information in the second generation radio access technology that are transmitted at a specific transmission timing, and a control unit that controls communication of the second generation radio access technology based on the synchronization signals and / or the control information.

[0008] 1 is a diagram showing an overall schematic configuration of a wireless communication system. 2 is a diagram showing a frequency range used in the wireless communication system. 3 is a diagram showing an example configuration of a radio frame, subframe, slot, and symbol used in the wireless communication system. 4 is a sequence diagram showing an example of a CBRA procedure. 5 is a sequence diagram showing another example of the CBRA procedure. 6 is a sequence diagram showing an example of a CFRA procedure. 7 is a diagram showing an example of an SSB configuration. 8 is a diagram showing a comparison of each SS of LTE and NR. 9 is a diagram showing an example of RRC for configuring SRS. 10 is a diagram showing an example of coexistence between NR and 6G. 11 is a diagram showing an example of SIB1 of proposal 1-1. 12 is a diagram showing an example of the procedure of proposal 1-1. 13 is a diagram showing an example of a table. 14 is a diagram showing an example of the procedure of proposal 1-2. 15 is a diagram showing an example of the procedure of another variation of proposal 1-1. 16 is a diagram showing a first example of proposal 1-2. 17 is a diagram showing an example of proposal 1-2-1. 18 is a diagram showing an example of an SSB in another variation of proposal 1-2. 19 is a diagram showing an example of the transmission and reception relationship of SSB in another variation of proposal 1-2. 19 is a diagram showing an example of proposal 1-3. 19 is a diagram showing an example of a combination of proposal 1. 20 is a diagram showing a comparative example of proposal 1 and its variations. FIG. 1 is a diagram showing an example of the procedures for each option of Proposal 2-1. FIG. 2 is a diagram showing an example of the procedures for Proposal 2-2. FIG. 3 is a diagram showing an example of Proposal 3-1. FIG. 4 is a diagram showing an example of Option 1 of Proposal 3-2. FIG. 5 is a diagram showing example system information for Option 2 and Variation 2 of Proposal 3-2. FIG. 6 is a block diagram showing an example of the configuration of a base station according to an embodiment of the present disclosure. FIG. 7 is a block diagram showing an example of the configuration of a terminal according to an embodiment of the present disclosure. FIG. 8 is a diagram showing an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. FIG. 9 is a diagram showing an example of the configuration of a vehicle according to an embodiment of the present disclosure.

[0009] Hereinafter, embodiments will be described with reference to the drawings. Note that the same or similar reference numerals are used to designate the same functions or configurations, and descriptions thereof will be omitted as appropriate.

[0010] 1 is a wireless communication system conforming to a method called 5G. Alternatively, the wireless communication system 10 may be a wireless communication system conforming to a method called Beyond 5G, 5G Evolution, or 6G.

[0011] The wireless communication system 10 can support Massive Multiple-Input Multiple-Output (Massive MIMO), which generates more directional beams by controlling wireless signals transmitted from multiple antenna elements, Carrier Aggregation (CA), which uses multiple component carriers (CCs) as a bundle, and Dual Connectivity (DC), which enables simultaneous communication with two base stations.

[0012] As shown in FIG. 1 , the wireless communication system 10 includes a base station 100 (hereinafter also referred to as a gNodeB (gNB) 100) constituting a Next Generation-Radio Access Network (NG-RAN) 20, and a terminal 200 (hereinafter also referred to as a user equipment (UE) 200) that performs wireless communication with the gNB 100. The NG-RAN 20 is connected to a core network (CN) (not shown). The CN is composed of multiple network functions (NFs). The NFs are, for example, an access and mobility management function (AMF) and a network data analytics function (NWDAF). The AMF performs, for example, registration of the UE 200. The NWDAF performs, for example, optimization of the CN. Note that the specific configuration of the wireless communication system 10, for example, the number of gNBs 100 and UEs 200, is not limited to the example shown in FIG. 1 . The NG-RAN 20 and the CN may be simply referred to as a "network."

[0013] The gNB100 may be a base station in a Centralized-Radio Access Network (C-RAN) configuration having a distributed unit (DU) having a function for connecting to the UE200 and a central unit (CU) having a function for connecting to the network. In this case, the gNB100 may be read as a DU, a CU, or a DU and a CU. When the gNB100 is read as a DU, it may be called a gNB-DU. When the gNB100 is read as a CU, it may be called a gNB-CU. When the gNB100 is read as a DU and a CU, the DU portion may be called a gNB-DU and the CU portion may be called a gNB-CU.

[0014] The wireless communication system 10 may also support multiple frequency ranges (FR). That is, as shown in Fig. 2, the wireless communication system 10 may support the following FRs: FR1: 410 MHz to 7.125 GHz FR2-1: 24.25 GHz to 52.6 GHz FR2-2: Over 52.6 GHz to 71 GHz

[0015] In FR1, a subcarrier spacing (SCS) of 15, 30, or 60 kHz and a bandwidth (BW) of 5 to 100 MHz may be used, while in FR2-1, an SCS of 60 or 120 kHz (or even 240 kHz) and a BW of 50 to 400 MHz may be used.

[0016] Note that SCS may be interpreted as numerology, which is defined in 3GPP TS 38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0017] In FR2-2, to avoid an increase in phase noise, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) with a larger SCS may be applied.

[0018] 3 is a diagram showing an example of the configuration of a radio frame (system frame), subframe, and slot used in the radio communication system 10. As shown in FIG. 3, one slot is composed of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in FIG. 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

[0019] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, it may be 28 or 56 symbols, etc.) Furthermore, the number of slots per subframe may differ depending on the SCS.

[0020] 3 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), etc.

[0021] The wireless communication system 10 may support coverage enhancement (CE) that expands the coverage of a cell (or a physical channel) formed by the gNB 100. In coverage enhancement, a mechanism for increasing the success rate of reception of various physical channels, such as repeated transmission (repetition) of a PRACH (physical random access channel), may be provided.

[0022] For example, UE200 receives information related to the random access procedure from gNB100 as a downlink (DL) signal (e.g., SIB1 (System Information Block Type 1) etc.).

[0023] Further, for example, UE 200 transmits PRACH as an UL signal to gNB 100 using a RACH occasion (RO), which is a resource for transmitting a random access preamble. For example, UE 200 repeatedly transmits PRACH as an UL signal to gNB 100.

[0024] The UL signal may include, for example, a UL data signal and control information. For example, the UL signal may include information related to the processing capability of the UE 200 (e.g., UE capability). The UL signal may also include a reference signal.

[0025] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channel may include a physical uplink shared channel (PUSCH), and the control channel may include a physical uplink control channel (PUCCH). For example, the UE 200 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that the PUSCH is an example of an uplink shared channel, and the PUCCH is an example of an uplink control channel. The shared channel may also be called a data channel.

[0026] The reference signal included in the UL signal may include, for example, at least one of a Demodulation Reference Signal (DMRS), a Phase Tracking Reference Signal (PTRS), a Channel State Information - Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as the DMRS and PTRS are used to demodulate the UL data signal and are transmitted using the PUSCH.

[0027] Meanwhile, in response to the operation of UE200, gNB100 transmits information related to the RACH procedure to UE200 as a DL signal (e.g., SIB1, etc.).

[0028] Also, for example, gNB100 receives PRACH as an UL signal from UE200. For example, gNB100 repeatedly receives PRACH from UE200 as an UL signal.

[0029] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a physical downlink shared channel (PDSCH), and the control channel may include a physical downlink control channel (PDCCH). For example, the gNB 100 transmits control information to the UE 200 using the PDCCH, and transmits DL data signals using the PDSCH. Note that the PDSCH is an example of a downlink shared channel, and the PDCCH is an example of a downlink control channel. Note that the PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0030] The reference signal included in the DL signal may include, for example, at least one of a DMRS, a PTRS, a CSI-RS, an SRSRS, and a PRS for location information. For example, the reference signal such as the DMRS or the PTRS is used for demodulating the DL data signal and is transmitted using the PDSCH.

[0031] <Random Access Procedure> The NR random access procedure is performed for various purposes such as initial access, recovery from beam interference, handover, etc. The random access procedure includes a CBRA (Contention Based Random Access) procedure as a contention-based random access procedure and a CFRA (Contention Free Random Access) procedure as a contention-free random access procedure. Since the CBRA procedure is initiated by the UE 200 voluntarily, collisions may occur when multiple UEs 200 simultaneously initiate the random access procedure. On the other hand, CFRA allows the gNB 100 to instruct the connected UE 200 to perform the random access procedure so that collisions do not occur between multiple UEs 200.

[0032] In NR, a random access procedure may be performed by selecting a Synchronization Signal (SS) / Physical Broadcast Channel (PBCH) block, or by selecting a CSI-RS. The SS / PBCH block may be referred to as a Synchronization Signal Block (SSB) or synchronization signal, and the CSI-RS may be referred to as a reference signal.

[0033] FIG. 4 is a sequence diagram illustrating an example of a CBRA procedure.

[0034] For example, the gNB 100 transmits an SSB for each beam, and the UE 200 monitors the SSB of each beam. The UE 200 selects an SSB from among the multiple SSBs whose received power (RSRP: Reference Signal Received Power) is greater than a threshold (or is equal to or greater than a threshold), and transmits a random access preamble to the gNB 100 via a PRACH using an RO associated with (corresponding to) the selected SSB (step S101). The random access preamble (sometimes abbreviated as an RA preamble or RA preamble) may be appropriately referred to as a preamble, a PRACH preamble, a message 1, an Msg1, or the like.

[0035] The gNB 100 transmits a response message to Msg1 as a second message to the UE 200 via the PDSCH (step S102). This response message (second message) may be appropriately referred to as a random access response (RAR), RA Response, message 2 (Message 2), Msg2, or the like. After transmitting Msg1, the UE 200 may monitor the PDCCH used for scheduling the PDSCH including Msg2. Msg2 may include an uplink grant (UL Grant) (RAR uplink grant) used for scheduling the PUSCH including the third message transmitted by the UE 200.

[0036] The UE 200 transmits the PUSCH scheduled by the RAR uplink grant as a third message (step S103). For example, the UE 200 transmits a radio resource control (RRC) connection request, an RRC connection re-establishment request, or the like to the gNB 100 via the PUSCH. The third message may be appropriately referred to as a message 3, Msg 3, an RRC connection request, or the like.

[0037] The gNB 100 transmits a contention resolution message (Contention Resolution Message) as a fourth message via the PDSCH (step S104). This contention resolution message (fourth message) may be referred to as Message 4, Msg 4, or the like, as appropriate. After transmitting Msg 3, the UE 200 may monitor the PDCCH used for scheduling the PDSCH including Msg 4. Msg 4 may include a contention resolution ID (UE contention resolution ID). The contention resolution ID may be used to resolve contention between multiple UEs 200 transmitting signals using the same radio resources. If the contention resolution ID included in the Msg 4 received by the UE 200 is the same value as the ID for identifying the UE 200, the UE 200 determines that contention resolution is successful and may set the value of the Temporary Cell-Radio Network Temporary Identifier (TC-RNTI) in the Cell-Radio Network Temporary Identifier (C-RNTI) field. When the value of the TC-RNTI is set in the C-RNTI field, the UE 200 may consider the RRC connection to be completed. Msg4 may be referred to as an RRC connection setup, etc.

[0038] UE200, whose RRC connection has been completed, may transmit an Ack (Acknowledgement) via the PUCCH (PUCCH resource) indicated by the PUCCH resource indication field included in the PDCCH that scheduled Msg4 in order to notify gNB100 that the RRC connection has been completed. Also, after the RRC connection is established, UE200 may transmit UE capability to gNB100. The above-described random access procedure may be referred to as a Type 1 RACH procedure, a 4-step RACH procedure, a Type 1 RACH, a 4-step RACH, or the like.

[0039] FIG. 5 is a sequence diagram showing another example of the CBRA procedure.

[0040] The UE 200 transmits a message including an RA preamble and data to the gNB 100 (step S201). As an example, the UE 200 selects an RO in the same manner as selecting an RO in the 4-step RACH procedure, transmits an RA preamble in the RO, and transmits data in a PUSCH resource associated with the RO. This message may be appropriately referred to as Message A, Msg A, etc. Note that the RA preamble and data here may correspond to Msg 1 and Msg 3 in the 4-step RACH procedure, respectively. Msg A includes one RA preamble (referred to as Msg A PRACH) and one piece of data (referred to as Msg A PUSCH), and the Msg A PRACH and Msg A PUSCH are time-division multiplexed and transmitted. More specifically, the MsgA PRACH is one preamble with one preamble index in the MsgA RACH occasion (RO), and the MsgA PUSCH is one PUSCH with one PUSCH resource unit (PRU) in the MsgA PUSCH occasion (PO) according to the MsgA PUSCH configuration. Note that in this procedure, the resources for transmitting data are not limited to PUSCH resources, and may be resources of any channel for transmitting data (or control information).

[0041] The gNB 100 transmits the response message to the UE 200 as a second message (step S202). This response message (second message) may be appropriately referred to as Message B, Msg B, or the like. The content included in Message B may correspond to, for example, Msg2 and Msg4 in the 4-step RACH procedure. MsgB includes one PDSCH (and one PDCCH that schedules the PDSCH). From the perspective of the physical layer, the content of Msg2 and Msg4 is simply integrated into MsgB.

[0042] The UE 200, whose RRC connection has been completed, may transmit an Ack via the PUCCH (PUCCH resource) to notify the gNB 100 that the RRC connection has been completed. Also, after the RRC connection is established, the UE 200 may transmit UE capability to the gNB 100. The above-described random access procedure may be referred to as a Type 2 RACH procedure, a 2-step RACH procedure, a Type 2 RACH, a 2-step RACH, or the like. The 2-step RACH is supported to shorten the RACH delay.

[0043] FIG. 6 is a sequence diagram illustrating an example of a CFRA procedure.

[0044] The UE 200 is requested to transmit an RA preamble (Msg1) from the gNB 100. Here, the gNB 100 allocates the RA preamble (Msg1) via dedicated signaling (step S301). The PDCCH for such dedicated signaling may be referred to as a PDCCH order. The UE 200 may monitor the PDCCH (PDCCH order) to perform resource allocation for Msg1.

[0045] UE200 transmits the above-mentioned Msg1 to gNB100 (step S302).

[0046] The gNB100 transmits the above-mentioned Msg2 to the UE200 (step S303). After the RRC connection is completed, the UE200 may transmit an Ack via the PUCCH (PUCCH resource) to notify the gNB100 that the RRC connection has been completed. After the RRC connection is established, the UE200 may transmit the UE capability to the gNB100.

[0047] In this embodiment, in order to achieve coverage extension in the random access procedure, UE 200 may repeatedly transmit Msg1 (and therefore PRACH) in, for example, the above-described 4-step RACH procedure shown in Fig. 4 and the CFRA procedure shown in Fig. 6. However, in the present disclosure, Msg1 (and therefore PRACH) may also be repeatedly transmitted in the above-described 2-step RACH procedure shown in Fig. 5.

[0048] <Explanation of Terms> In this disclosure, 5G (5th generation) refers to the standardized wireless communication technology established by 3GPP (3rd Generation Partnership Project). Also, NR (New Radio) refers to a new radio access technology for 5G. In this disclosure, 5G is an example of "first generation radio access technology." Also, in this disclosure, "5G" and "NR" may be interchangeable.

[0049] In this disclosure, 6G (6th generation) refers to a standardized technology of the next generation of wireless communication technology after 5G, which is being formulated by 3GPP. 6G may be a standardized technology of a wireless communication technology of a generation subsequent to 5G. In this disclosure, 6G is an example of a "second generation wireless access technology subsequent to the first generation." 6G may be defined as a wireless communication technology having functions, capabilities, and operations not included in 5G.

[0050] In the following, an example will be shown in which the generation succeeding 5G is 6G, but the present disclosure is not limited to this. For example, the generation succeeding 5G may include a generation succeeding 6G that may be established in the future (e.g., "7G (7th generation)," "8G (8th generation)," etc.).

[0051] 5G-compliant UEs and gNBs are referred to as "5G-UEs" and "5G-gNBs," respectively, and 6G-compliant UEs and gNBs are referred to as "6G-UEs" and "6G-gNBs." A "5G-UE" may also be referred to as an "NR-UE."

[0052] Furthermore, a signal / channel / information / data X in 5G may be written as "5G-X" or "NR-X," and a signal / channel / information / data X in 6G may be written as "6G-X." For example, SSB in 5G may be written as "5G-SSB" or "NR-SSB," and SSB in 6G may be written as "6G-SSB."

[0053] Furthermore, signal / channel / information / data X in LTE (long term evolution) may be written as "LTE-X." For example, SS in LTE is written as "LTE-SS."

[0054] Furthermore, the time domain may be abbreviated as TD or T, and the frequency domain may be abbreviated as FD or F. For example, a time domain resource may be referred to as a TD resource, and a time domain instruction may be referred to as a TD instruction.

[0055] Furthermore, terms such as "information," "signal," "data," "parameter," and "channel" may be interchangeable. A channel may be abbreviated as "CH," a reference signal may be abbreviated as "RS," and a channel and / or reference signal may be abbreviated as "CH / RS." Terms such as "configured," "associated," and "supported" may be interchangeable.

[0056] Next, an example of a DL signal considered in this embodiment will be described.

[0057] <SSB> As described above, initial access of a UE in NR is performed in the following steps: acquiring a synchronization signal (hereinafter referred to as SS), acquiring broadcast information, and establishing a connection by random access. SS in NR includes two signals: a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). In addition, SS in NR, together with PBCH, etc., the SS / PBCH block is also referred to as an SSB (synchronization signal block) hereinafter.

[0058] Fig. 7 is a diagram showing an example of the configuration of an SSB. The horizontal axis of Fig. 7 represents the time axis, and the vertical axis represents the frequency axis. As shown in Fig. 7, the SSB includes a PSS, an SSS, and a PBCH in four symbols.

[0059] Using SSB, the gNB provides the UE with initial access and mobility functions such as discovering NR cells, establishing frame synchronization, measuring downlink reception quality, and notifying the UE of system parameters necessary for receiving other broadcast information.

[0060] In NR, transmission candidate symbol positions for multiple SSBs are defined within a half frame. The SSBs are transmitted periodically, and different transmit beamforming techniques are applied to the multiple SSBs.

[0061] In NR, SSB is transmitted in resources specified by information called Frequency Domain Resource Allocation (FDRA) and Time Domain Resource Allocation (TDRA). The FDRA and TDRA may have a table format.

[0062] FDRA indicates resources in the frequency direction of SSB.

[0063] The TDRA indicates resources in the time direction for the SSB. For example, the TDRA includes information indicating the first OFDM symbol in which the SSB is transmitted.

[0064] The PSS is a known signal that the UE first attempts to detect during a cell search, and the SSS is a known signal for detecting a physical cell ID during a cell search.

[0065] The PBCH includes information (e.g., MIB (Master Information Block)) for the UE to establish frame synchronization with the NR cell after the SSB is detected. The PBCH also includes system parameters for receiving SIB (System Information Block) 1.

[0066] <NR-SS> A comparison between LTE-SS and NR-SS will be explained.

[0067] 8 is a diagram showing a comparison of each SS of LTE and NR. In FIG. 8, a comparison between NR-PSS and LTE-PSS, and a comparison between NR-SSS and LTE-SSS are shown.

[0068] As shown in Figure 8, the number of IDs for LTE-SS is 504, and the number of IDs for NR-SS is 1008. In other words, the number of IDs for physical cells of NR-SS is twice as many as that of LTE-SS.

[0069] As shown in Figure 8, the number of RBs and the sequence length of LTE-PSS are 6 and 63, respectively, and the number of RBs and the sequence length of NR-PSS are 12 and 127, respectively. In other words, the number of subcarriers / RBs and the sequence length of NR-SS are twice as many as those of LTE-SS.

[0070] As shown in Figure 8, in NR-SSS, the SCS is set to one of 15, 30, 120, or 240. That is, in NR-SS, scalable symbol width and bandwidth are set according to the SCS. This supports a wide frequency range with common baseband processing. A default SCS is defined for each band. The actual SCS is notified to the UE.

[0071] <NR-PBCH> PBCH may be a broadcast channel for the gNB to transmit the MIB to the UE. NR-PBCH has a large payload size of 56 bits. Some elements are generated in the physical layer (PHY layer). For example, timing-related information is generated in the PHY layer and changed within a transmission time interval (TTI). Note that information generated in higher layers does not change within a TTI. The timing-related information may be at least one of an SSB index, an LSB of the SFN, and a half-frame index.

[0072] Next, an example of system information will be described.

[0073] <NR-SIB1> SIB1 includes information for initial access, such as information about UL carriers and information about the configuration of random access signals. For example, SIB1 may include information about the scheduling of other SIBs. SIB1 indicates, for example, whether the other SIBs are provided on a periodic broadcast basis or on an on-demand basis.

[0074] SIB1 is transmitted via a PDSCH (e.g., a downlink-shared channel (DL-SCH)). SIB1 may correspond to the first RRC message excluding the MIB. SIB1 may be transmitted periodically at a specific period and may be repeatedly transmitted within the period.

[0075] SIB1 includes "cellSelectionInfo", "si-SchedulingInfo", and "servingCellConfigCommon".

[0076] "cellSelectionInfo" includes parameters for cell selection related to the serving cell. "si-SchedulingInfo" is an information element that includes information for obtaining a system information (SI) message. "servingCellConfigCommon" is an information element used to configure cell-specific parameters of the UE's serving cell. This information element includes parameters obtained from the SSB, MIB, or SIB when the UE accesses a cell from the idle state.

[0077] For example, "ServingCellConfigCommon" includes "ssb-PositionsInBurst." "ssb-PositionsInBurst" indicates the positions of SSB in the time domain.

[0078] CORESETZERO (control resource set zero) is a special CORESET that carries PDCCH / DCI for SIB1.

[0079] Next, an example of a UL signal considered in this embodiment will be described.

[0080] <PUSCH> PUSCH is a channel used for transmitting UL data, etc. The UE transmits the PUSCH in resources determined based on PUSCH resource allocation.

[0081] In resource allocation for PUSCH, SLIV (Start and Length Indicator Value) is used in time domain allocation. That is, in resource allocation for PUSCH, the start position and length are indicated in the time domain. Therefore, in resource allocation for PUSCH, consecutive symbols are indicated.

[0082] There are two types of PUSCH resource allocation in frequency domain allocation: Type 0 and Type 1. In Type 0, resource allocation is performed using a bitmap that associates one bit per RBG (resource block group). In this case, non-contiguous RBGs may be allocated to PUSCH resources. In Type 1, the start position and length are indicated at the RB level. In Type 1, the start position and length are indicated in the RIV (resource indication value) frequency domain, so contiguous RBs are indicated for PUSCH resource allocation.

[0083] <SRS (Sounding Reference Signal)> SRS is a reference signal for UL and is used to estimate channel quality in the gNB. The UE transmits the SRS according to the SRS configuration provided by the RRC.

[0084] Fig. 9 is a diagram showing an example of RRC for configuring SRS. As shown in Fig. 9, "SRS-Resource" includes information on multiple ports supported by SRS, information related to the transmission comb (Tx comb), time domain allocation, frequency domain allocation, and information on hopping. Based on this configuration, the UR configures resources to be used for transmitting the SRS and transmits the SRS.

[0085] Next, the frequency share considered in this embodiment will be described.

[0086] <DSS in NR> DSS (dynamic spectrum sharing) was proposed in Release-15 of NR (hereinafter referred to as Rel-15). DSS was further extended from Rel-15 to Rel-18 for spectrum sharing between LTE (long term evolution) and NR.

[0087] In DSS, rate matching is performed.

[0088] <Rate Matching> Rate matching in DSS sets a region of some resources to which data / information / signals, etc. cannot be allocated. For example, in a case where resources to which data cannot be allocated are set in the PDSCH, it is possible to avoid interference with other channels when the PDSCH partially overlaps with other channels.

[0089] For example, in DSS between LTE and 5G, the NR cell avoids interference with the LTE-CRS by setting rate matching around the LTE-CRS. For example, by setting rate matching around the LTE-CRS, the NR cell avoids scheduling (e.g., scheduling of PDSCH) in the RE of the LTE-CRS.

[0090] "RateMatchPatternLTE-CRS" is an information element used to set a rate match pattern around the LTE-CRS. The rate match pattern around the LTE-CRS may be a pattern indicating resources that avoid the LTE-CRS.

[0091] "RateMatchPatternLTE-CRS" includes fields called "carrierFreqDL", "carrierBandwidthDL", "mbsfn-SubframeConfigList", and "nrofCRS-Ports".

[0092] "carrierFreqDL" indicates the center of the LTE carrier. "carrierBandwidthDL" indicates the bandwidth (BW) of the LTE carrier in multiple PRBs. "mbsfn-SubframeConfigList" contains the configuration of the LTE MBSFN subframes. "nrofCRS-Ports" indicates the number of antenna ports of the LTE CRS for rate matching.

[0093] For example, in DSS between LTE and 5G, by configuring rate matching around the LTE-PSS / SSS / PBCH and PDCCH regions, the NR cell avoids interference with the LTE-PSS / SSS / PBCH and PDCCH regions. For example, by configuring rate matching around the LTE-PSS / SSS / PBCH and PDCCH regions, the NR cell avoids scheduling (e.g., scheduling of PDSCH) in the resources of the LTE-PSS / SSS / PBCH and PDCCH regions.

[0094] For example, "RateMatchPattern" is an information element (IE) used to set one rate matching pattern for PDSCH. The rate matching pattern for PDSCH may be a pattern indicating resources that avoid LTE-PSS / SSS / PBCH, etc. PDSCH scheduling is performed based on this matching pattern.

[0095] The "RateMatchPattern" includes fields called "resourceBlocks", "symbolsInResourceBlock", "periodicityAndPattern", "periodicityAndPattern", and "controlResourceSet". No scheduling (e.g., scheduling of PDSCH) is performed on resources specified by these fields.

[0096] "resourceBlocks" contains an indication of a bitmap for RB in the frequency domain. "symbolsInResourceBlock" contains an indication of a bitmap for 1 or 2 slots in the time domain. "periodicityAndPattern" contains an indication of a bitmap for repetition in the time domain of the above frequency and time domain patterns. "controlResourceSet" contains an indication of RM resources. "controlResourceSet" may be reused to indicate resources in CORESET.

[0097] As described above, the configuration of rate matching around the LTE-CRS (cell specific reference signal) is configured so that the NR cell avoids interference with the LTE-CRS.

[0098] As described above, the RB-level rate matching settings around the LTE-PSS / SSS / PBCH and PDCCH regions are configured so that the NR cell avoids interference with the LTE-PSS / SSS / PBCH and PDCCH regions.

[0099] In NR, rate matching is extended in different releases.

[0100] In NR Rel-15, one LTE-CRS rate matching pattern is set for each NR serving cell as rate matching (RM) for DSS.

[0101] In NR Rel-16, up to three non-overlapping LTE-CRS rate matching patterns in the frequency domain are set for each NR serving cell as rate matching (RM) for DSS. Also, in NR Rel-16, only when MTRP (multiple transmission and reception point) is set as rate matching (RM) for DSS, up to two overlapping LTE-CRS rate matching patterns are set for each NR serving cell.

[0102] In NR Rel-18, two overlapping LTE-CRS rate matching patterns are set for each NR serving cell as rate matching (RM) for DSS, regardless of the MTRP setting.

[0103] <ZP-CSI-RS-Resource> "ZP-CSI-RS-Resource" will be described as a legacy RE-level RM configuration signaling. "ZP-CSI-RS-Resource" is an information element used to configure zero-power CSI-RS resources. For example, "ZP-CSI-RS-Resource" is included in "PDSCH-Config" and signaled by RRC.

[0104] As ZP implies, no signal is transmitted in the ZP-CSI-RS resources.

[0105] "ZP-CSI-RS-Resource" includes fields called "resourceMapping" and "periodicityAndOffset".

[0106] "ResourceMapping" contains information about the occupancy of OFDM symbols and subcarriers of ZP-CSI-RS resources within a slot.

[0107] "periodicityAndOffset" contains information about the periodicity and slot offset of periodic / semi-persistent ZP-CSI-RS. The network (e.g., gNB) configures this value for periodic and semi-persistent ZP-CSI-RS to the UE.

[0108] <Consideration: MRSS for 6G-5G Spectrum Sharing> Multi-RAT spectrum sharing (MRSS) is a key technology for 5G-6G coexistence, especially when there is insufficient dedicated 6G spectrum and existing 5G / 5G-A spectrum is utilized.

[0109] 10 is a diagram showing an example of coexistence between NR and 6G. The horizontal axis of FIG. 10 represents the time axis, and the vertical axis represents the frequency axis. In MRSS, as shown in FIG. 10, coexistence of NR and 6G within the same frequency is being considered.

[0110] The deployment of MRSS requires avoiding interference from 6G to existing NR systems. Avoiding interference is particularly challenging for periodic RS / periodic channels in NR. Periodic RS / periodic channels in NR include, for example, at least one of SSB, SIB1, other SIBs, CORESETZERO, paging or other settings indicated by SIBs, periodic / semi-persistent CSI-RS, etc.

[0111] In this embodiment, a method for avoiding interference from 6G to an existing NR system will be described. Illustratively, interference is avoided by reducing the transmission of signals for 6G. For example, by sharing a portion of the signal between NR and 6G, the transmission of signals for 6G is reduced. Furthermore, by adjusting the transmission period of periodic signals for 6G, the transmission of signals for 6G is reduced. Furthermore, instead of periodically transmitting signals for 6G, the transmission of signals for 6G is reduced by transmitting signals on demand in response to a request from a 6G-UE or the like.

[0112] Note that "6G signals" may be replaced with "6G-dedicated signals." Furthermore, "6G signals," "6G channels," "6G information," and "6G settings" may be replaced with each other. Furthermore, "reducing the transmission of 6G signals" may be replaced with "reducing the frequency of transmitting 6G signals" and "reducing the transmission of 6G signals."

[0113] As an example, the following three proposals will be described. Proposal 1: Proposal of a design that shares SSB between NR and 6G. Proposal 2: Proposal of a design that shares RACH between NR and 6G. Proposal 3: Proposal of reducing 6G signaling.

[0114] In this embodiment, 5G (or NR) and 6G are used as examples of two systems or two wireless communication technologies, but the present disclosure is not limited thereto. Instead of 6G, the present disclosure may be applied to a system subsequent to 6G, or may be applied to two or more systems or wireless communication technologies subsequent to 6G.

[0115] <Proposal 1> 6G is a new system. If periodic signaling in NR is reused for the 6G system without introducing a new signal, interference from the 5G / 5G-A NR system to the 6G periodic signaling should be avoided.

[0116] Proposal 1 describes a design in which SSB is shared between NR and 6G. Note that "sharing between A and B" may be replaced with "common use between A and B" or "common use between A and B."

[0117] <Proposal 1-1> NR-PSS / SSS is shared with 6G-UE. NR-PBCH is shared with 6G-UE with the following extensions. Hereinafter, SSB shared between NR and 6G is referred to as "shared SSB."

[0118] A reserved bit in the MIB may be used to indicate at least one of the following four indications. The reserved bit may be one bit. The following four indications may be interchangeable: - An indication of whether the SIB1 configuration is for 6G - An indication of whether the SIB1 and / or other SIB configuration is for 6G - An indication of whether the SSB is a shared SSB for a 6G system - An indication of whether SIB1 transmission for 6G-UE is present Note that the SIB1 configuration for 6G corresponds to "SIB1 configuration for 6G".

[0119] Although the reserved bits of the MIB are used for indicating at least one of the four indications in the above description, at least one of the following variations may be applied to at least one of the four indications. Variation 1: An indication of a specific predefined value in a specific band may implicitly indicate at least one of the four indications. Variation 2: Whether or not there is another SIB configuration for 6G may be further indicated by signaling in SIB1 for 6G / 5G. The other SIB may be at least one SIB other than SIB1.

[0120] The 6G-UE determines whether the SIB1 setting is for 6G based on the reserved bit in the MIB, and controls 6G communication based on the determination. On the other hand, the NR-UE may ignore the value of the reserved bit in the MIB.

[0121] For example, when a bit indicated by a reserved bit in the MIB is "1", if a UE (e.g., a 6G-UE) monitors the PDCCH for SIB1 and / or other SIBs in the PDSCH, the UE is expected to read the configuration of SIB1 and / or other SIBs for the 6G system as well as the PDSCH for scheduling NR-SIB1.

[0122] For settings explicitly configured for 6G in SIB1 and / or other SIB settings, the UE follows the settings for 6G. For at least one setting missing for 6G, the UE follows the settings for 5G based on predefined rules or explicit settings regarding whether to follow 5G. Shared SIBx may be achieved in this case.

[0123] The configuration of SIB1 / other SIBs for 6G may also update the information indicated by the MIB, for example, the updated information may include "cellBarred" indicating a barred cell and / or "intraFreqReselection" controlling cell selection / reselection to cells within a frequency.

[0124] On the same frequency, the required number of SSBs for coverage is the same for 5G and 6G systems, and it is possible to share the same number of SSB setups / transmissions for coverage with the same SCS.

[0125] On the gNB side, the gNB transmits one PSS / SSS / PBCH and SIB1, which is detected by both NR-UE and 6G-UE.

[0126] 11A is a diagram showing an example of SIB1 of Proposal 1-1. FIG. 11B is a diagram showing an example of the procedure of Proposal 1-1.

[0127] As shown in FIG. 11A, SIB1 of Proposal 1-1 includes, in addition to the configuration for NR ("configuration for NR" in FIG. 11A), an information element ("SIB1-6G-IEs") including the configuration for 6G ("configuration for 6G") is optionally included. "SIB1-6G-IEs" may include scheduling information "si-SchedulingInfo". "si-SchedulingInfo" includes information for obtaining SI (system information) messages.

[0128] The two cases in Figure 11B show the flow from receiving (monitoring) SSB to acquiring SIBx. Case 1 is a case where "si-SchedulingInfo" is not included in SIB1 for 6G, and Case 2 is a case where "si-SchedulingInfo" is included in SIB1 for 6G.

[0129] In case 1 of FIG. 11B, the UE receives PSS / SSS / PBCH and detects an indication included in the received PBCH. The detected indication indicates that the SIB1 configuration is for 6G. In this case, the PDSCH for SIB1 includes the SIB1 for 6G. The 6G-UE assumes SIB1 / SIBx including configurations for 6G and NR. The 6G-UE then acquires the SIB1 for 6G from the PDSCH. Note that in case 1, the SIB1 for 6G does not include "si-SchedulingInfo." In case 1, the SIBx for 6G may be included in the PDSCH for SIBx, just like the SIBx for NR. Also, in case 1, the NR-UE does not understand the configuration of the SIB1 / SIBx for 6G, so it ignores it.

[0130] In case 2 of FIG. 11B, the UE receives the PSS / SSS / PBCH and detects an indication included in the received PBCH. The detected indication indicates that the SIB1 configuration is for 6G. In this case, the PDSCH for SIB1 includes the SIB1 for 6G. The 6G-UE assumes an SIB1 that includes both 6G and NR configurations. The 6G-UE then acquires the SIB1 for 6G from the PDSCH. Note that in case 2, the SIB1 for 6G includes "si-SchedulingInfo". In case 2, the SIBx for 6G is included in the PDSCH of the SIBx for 6G, and the 6G-UE reads the SIBx for 6G from the PDSCH. The SIBx for NR is included in the PDSCH of the SIBx for NR, and the NR-UE reads the SIBx for NR from the PDSCH.

[0131] In addition, in Proposal 1-1, the MIB may always indicate SIB1 / SIBx for NR and SIB1 / SIBx for 6G.

[0132] <Variation 1 of Proposal 1-1> "pdcch-ConfigSIB1" in the MIB indicates the location and configuration of the CORESETZERO / Type-0 PDCCH CSS set. Note that these are predefined by the specifications.

[0133] A new table for the interpretation of "pdcch-ConfigSIB1" in the MIB for 6G may be predefined. The 6G-UE identifies different resources for PDCCH detection for 6G-SIB scheduling. For example, one of the following options may be applied:

[0134] <Option 1> New tables such as Tables 13-0 to 13-15A of TS 38.213 are introduced for 6G-UE. Tables 13-0 to 15A of TS 38.213 are examples of tables indicating a set of CORESET resources for a Type0-PDCCH search space set or tables of PDCCH monitoring occasion parameters for a Type0 PDCCH CSS set. Furthermore, for the indication of the same index, 6G-UE may perform different interpretations regarding the SSB-CORESET multiplexing pattern, the number of RBs (or RB numbers) or symbols of the CORESET, and the position of the CORESET.

[0135] Fig. 12A is a diagram showing an example of a table, which is an example of Table 13-9 of TS 38.213.

[0136] In Option 1, for example, a new table for 6G-UE may correspond to Tables 13-10 to 13-12 for monitoring occasions of Type-0 PDCCH. The new table for 6G-UE may be defined with different values ​​from 1 to "0" defined in NR. Note that "0" is a parameter indicating the offset in the time direction from the SSB to the CORESET of Type-0 PDCCH.

[0137] <Option 2> In the NR table, only a portion of the information is redesigned for 6G-UE. The remaining information follows the NR table. For example, in an NR table showing the correspondence between multiple indexes, some indexes are redesigned for 6G-UE, and the remaining indexes remain unchanged and follow the NR table.

[0138] <Option 3> The reservation index in the legacy NR table is redesigned with new settings for 6G-UE.

[0139] Fig. 12B is a diagram showing an example of the procedure of Proposal 1-2. Fig. 12B shows the flow from receiving (monitoring) SSB to acquiring SIB1.

[0140] In FIG. 12B, the UE receives the PSS / SSS / PBCH and detects the instruction included in the received PBCH. The detected instruction is an instruction in the MIB "pdcch-ConfigSIB1" and is an instruction for the location and configuration of the CORESETZERO / Type-0 PDCCH CSS set. In this case, the NR-UE detects the CORESETZERO for NR and the SIB for NR. Also, in this case, the 6G-UE includes the SIB1 for 6G in the PDSCH for SIB1. The 6G-UE assumes SIB1 / SIBx including settings for 6G and NR. Then, the 6G-UE detects the CORESETZERO / Type-0 PDCCH and the SIB1 for 6G by applying an interpretation different from the NR interpretation to the MIB "pdcch-ConfigSIB1".

[0141] <Another Variation of Proposal 1-1> In another variation of Proposal 1-1, a 6G indication is provided in the SIB instead of being provided in the MIB. Note that the "6G indication" may be an indication indicating whether or not signals / information / channels / settings for 6G are included, or an indication indicating whether or not the signals / information / channels / settings are for 6G. For example, the "6G indication" may be at least one of the following. Note that the following indications may be interchangeable: - An indication of whether or not the settings of SIB1 are for 6G - An indication of whether or not the settings of SIB1 and / or other SIBs are for 6G - An indication of whether or not the SSB is a shared SSB for a 6G system - An indication of whether or not there is SIB1 transmission for 6G-UE

[0142] In another variation of Proposal 1-1, the NR-PSS / SSS / PBCH are shared with 6G-UEs, and new parameters exist in NR-SIB1 to indicate the 6G system. For example, the configuration of SIB1 (and / or other SIBx) for 6G is provided in NR-SIB1 or a new NR-SIB-y.

[0143] Fig. 13 is a diagram showing an example of a procedure of another variation of Proposal 1-1. The two cases in Fig. 13 show the flow from receiving (monitoring) SSB to acquiring SIB.

[0144] In case 1 of FIG. 13, the 6G-UE receives the PSS / SSS / PBCH. Here, the PSS / SSS / PBCH is a shared PSS / SSS / PBCH. The 6G-UE receives the PDSCH for SIB1. Here, the PDSCH for SIB1 includes the SIB1 for NR and new parameters for indicating the 6G system. In case 1, the SIB1 for 6G is provided in NR-SIB-y, so the 6G-UE acquires the SIB1 for 6G in NR-SIB-y based on the new parameters for indicating the 6G system.

[0145] In case 2 of FIG. 13, the 6G-UE receives the PSS / SSS / PBCH. Here, the PSS / SSS / PBCH is a shared PSS / SSS / PBCH. The 6G-UE receives the PDSCH for SIB1. Here, the PDSCH for SIB1 includes the SIB1 for NR and new parameters for indicating the 6G system. In case 1, the SIB1 for 6G is provided in the NR-SIB1 of the PDSCH, so the 6G-UE acquires the SIB1 for 6G in the NR-SIB1 based on the new parameters for indicating the 6G system.

[0146] As described above, in Proposal 1-1, additional information (e.g., 6G instructions) is provided by PBCH, and the 6G-UE acquires information for 6G (e.g., SIB1) based on the provided additional information. According to Proposal 1-1, since the SSB is shared between NR and 6G, there is no need to transmit SSB for 6G, and therefore interference between NR and 6G can be avoided.

[0147] <Proposal 1-2> Proposal 1-1 showed an example in which additional information (e.g., 6G instructions) was provided by PBCH, but in Proposal 1-2, the additional information in Proposal 1-1 is indicated by an extended PSS rather than by PBCH. Then, NR-SSS and NR-PBCH are shared with 6G-UE. The shared NR-SSS and NR-PBCH do not include additional information for 6G, and may be treated the same for NR and 6G.

[0148] When the 6G indication is indicated by the extended PSS, and the UE monitors the PDCCH for SIB1 and / or other SIBs in the PDSCH, the UE is assumed to read the configuration of SIB1 and / or other SIBs for the 6G system as well as the PDSCH for scheduling NR-SIB1. This may be the same as Proposal 1-1 described above.

[0149] FIG. 14 is a diagram showing a first example of Proposal 1-2. FIG. 14 shows the same SSB configuration as FIG. 7. As shown in FIG. 14, 6G-PSS is transmitted at the same T / F position as NR-PSS. The 6G-PSS indicates that the SIB1 setting is for 6G. The 6G-UE detects the 6G-PSS and, based on the instruction from the 6G-PSS, acquires the SIB1 for 6G from the PDSCH for SIB1.

[0150] As a method of enhancing PSS, the following proposals 1-2-1 and / or 1-2-2 may be applied.

[0151] <Proposal 1-2-1> In Proposal 1-2-1, a PSS for 6G is designed with a new m-sequence. Here, the length of the new m-sequence may be the same as that of the NR-PSS, but the shift amount of the new m-sequence is different. The 6G-PSS is transmitted at the same T / F position as the NR-PSS.

[0152] In a possible implementation, the gNB transmits 6G-PSS and NR-PSS in the same RE with the same spatial relation / beam because the two m-sequences are orthogonal and there is little interference between the two sequences. Since the scrambling for PBCH is related to the cell ID detected from the PSS / SSS, when transmitting 6G-PSS and NR-PSS, the gNB transmits 6G-PSS and NR-PSS in the same RE with the same spatial relation / beam. （２） ＩＤ In addition, the gNB may transmit one SSS and PBCH. （２） ＩＤ is a parameter used to determine the PSS sequence, and is determined by the cell ID. （２） ＩＤ is one of the values ​​0, 1, and 2, determined according to the cell ID.

[0153] FIG. 15 is a diagram showing an example of Proposal 1-2-1. FIG. 15 shows an example of shifting an m-sequence. "N_ID_2" in FIG. 15 is the same as the above "N （２） ＩＤ " corresponds to

[0154] The shifts for the three m-sequences for NR-PSS are "0", "43", and "86", corresponding to "N_ID_2" = 0, 1, and 2, respectively.

[0155] The shifts for the three m-sequences for 6G-PSS may be selected from intermediate values ​​between 0 and 43, between 43 and 86, and between 86 and 127. To reduce interference between NR-PSS and 6G-PSS for the same N_ID_2, the shift gaps are mapped, for example, as follows: For N_ID_2=2, an intermediate value between 0 and 43 (e.g., 23 in FIG. 15) For N_ID_2=0, an intermediate value between 43 and 86 (e.g., 64 in FIG. 15) For N_ID_2=1, an intermediate value between 86 and 127 (e.g., 127 in FIG. 15)

[0156] Then, the sequence is determined by the following formula (1), for example: Note that N_ID_2 in formula (1) may be based on the above mapping. Note that other values ​​for 6G may be used for P. For example, the mapping of N_ID_2 may be changed by using other values.

[0157] As a variation of Proposal 1-2-1, a longer sequence than that of the NR-PSS may be used for the 6G-PSS, in which case the 6G-PSS may take over the unused REs in the first symbol of the SSB.

[0158] <Proposal 1-2-2> The PSS for 6G is designed with an additional orthogonal cover code (OCC) code with length 2 on top of the NR-PSS. For example, [+1, -1] is applied to every two REs in a frequency domain. The 6G-PSS is transmitted at the same time / frequency position as the NR-PSS.

[0159] <Variations of Proposal 1-2 (Variations Related to Network Implementation)> The design of 6G-PSS is the same as Proposal 1-2-1 / Proposal 1-2-2. 6G-SSS and 6G-PBCH simply follow the design / content of NR. On the other hand, 6G-SSS and 6G-PBCH are dedicated to 6G-UE. In other words, NR-SSS and NR-PBCH are not shared with 6G-UE. Thus, after detecting 6G-PBCH, 6G-UE decodes 6G-specific SIB1 configuration and then decodes other 6G-specific SIB configurations.

[0160] In a possible implementation, the gNB transmits 6G-SSB on the same REs as NR-SSB, but with different spatial relationships / beam directions. At the same time, NR-SSB and 6G-SSB are transmitted by the gNB on different beams. Then, NR-UE and 6G-UE decode their own SSBs, respectively. SIB1 for NR and SIB1 for 6G are scheduled by the gNB on either the same or different resources. In this scheduling, the beams are different.

[0161] Figure 16 is a diagram showing an example of SSB in another variation of Proposal 1-2. As shown in Figure 16, 6G-SSB instructs the configuration of 6G-SIB1, and NR-SSB instructs the configuration of NR-SIB1. In the example of Figure 16, 6G-UE assumes 6G-specific SIB1.

[0162] FIG. 17 is a diagram showing an example of the transmission and reception relationship of SSBs in another variation of Proposal 1-2. The horizontal axis in FIG. 17 represents the time axis. FIG. 17 shows an example in which four NR-SSBs and four 6G-SSBs transmitted at the same T / F position are transmitted using different beams. FIG. 17 also shows the NR-SSBs detected by the NR-UE and the 6G-SSBs detected by the 6G-UE. Note that #1 to #4 in FIG. 17 may be identification numbers (beam indexes) assigned to different beams. In addition, in FIG. 17, the four NR-SSBs are written in order as NR-SSB #0 to #3 in the time direction, and the four 6G-SSBs are written in order as 6G-SSB #0 to #3 in the time direction.

[0163] In the example of FIG. 17, it is assumed that a 6G-UE and an NR-UE are located at the same position in the network (e.g., within the coverage of the same beam #3). In this example, each UE decodes the SSB and discovers the corresponding SSB at different times. In the example of FIG. 17, the NR-UE detects NR-SSB #0 transmitted on beam #3 at time t1. The 6G-UE detects 6G-SSB #2 transmitted on beam #3 at time t2. In the example of FIG. 17, since NR-SSB and 6G-SSB are transmitted on different beams at the same time, for example, if a UE can detect both NR-SSB and 6G-SSB, the UE can detect one SSB at a certain time without detecting both SSBs. In other words, in this case, the UE can distinguish between NR-SSB and 6G-SSB by the beam.

[0164] As described above, in Proposal 1-2, additional information (e.g., 6G instructions) is provided by the PSS, and the 6G-UE acquires information for 6G (e.g., SIB1) based on the provided additional information. According to Proposal 1-2, since the SSB is shared between NR and 6G, there is no need to transmit SSB for 6G, and therefore interference between NR and 6G can be avoided.

[0165] <Proposal 1-3> Proposal 1-1 showed an example in which additional information (e.g., a 6G indication) was provided by PBCH, but in Proposal 1-3, the additional information in Proposal 1-1 is indicated by an additional sequence transmitted in the position of an RE not controlled by the NR-SSB. The NR-PSS, NR-SSS, and NR-PBCH are shared with 6G-UEs. The shared NR-PSS, NR-SSS, and NR-PBCH do not include additional information for 6G and may be handled in the same way for NR and 6G.

[0166] When the 6G indication is indicated by an additional sequence, and the UE monitors the PDCCH for SIB1 and / or other SIBs in the PDSCH, the UE is assumed to read the configuration of SIB1 and / or other SIBs for the 6G system as well as the PDSCH for scheduling NR-SIB1. This may be the same as Proposal 1-1.

[0167] For example, the new sequence is transmitted in 4 or 8 RBs located in the same symbol as the NR-PSS. The new sequence 4 may be an m-sequence, a Gold sequence, a ZC sequence, or another PN sequence.

[0168] The new sequence may be used to indicate more information than the 6G indication, for example, the new sequence may be used to indicate at least one of a 6G cell ID offset, an SSB index offset, a new super cell ID, an SCS, etc.

[0169] Figure 18 is a diagram showing an example of Proposal 1-3. Figure 18 shows the same SSB configuration as Figure 7. As shown in Figure 18, a new sequence for indicating 6G is transmitted in 4 RBs or 8 RBs located in the same symbol as the NR-PSS. This sequence indicates that the SIB1 setting is for 6G. The 6G-UE detects this sequence and, based on the sequence indication, acquires the SIB1 for 6G from the PDSCH for SIB1.

[0170] As described above, in Proposals 1-3, additional information (e.g., 6G instructions) is provided by information (e.g., a sequence) transmitted at the location of an RE not dominated by the NR-SSB, and the 6G-UE acquires information for 6G (e.g., SIB1) based on the provided additional information. According to Proposal 1-2, since the SSB is shared between NR and 6G, no SSB for 6G is transmitted, and therefore interference between NR and 6G can be avoided. Furthermore, in Proposal 1-3, the SSB is shared between NR and 6G without being extended, so compatibility can be maintained.

[0171] Combinations of Proposal 1 Combinations of two or more of the proposals described above may be supported.

[0172] Fig. 19A is a diagram showing an example of a combination of Proposal 1. Fig. 19A shows two cases of the flow from SSB detection to SIB1 acquisition.

[0173] For example, by combining the variation of Proposal 1-1 with Proposal 1-3, for example, as shown in Case 1 and Case 2 of FIG. 19A, the 6G-UE detects the 6G-dedicated CORESETZERO / type-0 PDCCH CSS and the 6G-dedicated SIB1.

[0174] For example, by combining the variation of Proposal 1-1 with Proposal 1-2, as shown in Case 1 and Case 2 of FIG. 19A, the 6G-UE detects the 6G-dedicated CORESETZERO / type-0 PDCCH CSS and the 6G-dedicated SIB1.

[0175] <Variations> The above-described proposals may be applied to Type0A / 0B / 1 / 2-PDCCH CSS. In this case, as with each proposal, the application target may be shared with NR or may be dedicated to 6G.

[0176] 19B is a diagram showing a comparative example of Proposal 1 and its variations. Hereinafter, the above proposals and their variations will be described with reference to FIG.

[0177] The main idea of ​​Proposal 1-1 is that there is one bit of indication for 6G in the MIB, and SSB and SIB1 are shared. In the case of Proposal 1-1, the operation of detecting 6G-SSB in the MRSS band and the 6G dedicated band may be the same between bands. Note that the MRSS band is the band where MRSS is performed, that is, the band shared by NR and 6G. The 6G dedicated band is the band used only by 6G. In the case of Proposal 1-1, the operation of reading SIB1 for 6G in the MRSS band and the 6G dedicated band is not the same between bands. For example, in the MRSS band, SIB1 contains information for both NR and 6G. In the 6G dedicated band, SIB1 contains information for 6G only. Regarding the gNB operation of transmitting NR-SSB, 6G-SSB, NR-SIB1, and 6G-SIB1 in Proposal 1-1, the gNB transmits one SSB for both NR and 6G. The gNB also transmits one SIB1 for both NR and 6G. Note that this SIB1 includes the settings for the two systems.

[0178] The main idea of ​​the variation of Proposal 1-1 is the introduction of a new table for interpreting pdcch-CONfigSIB1 in the MIB for 6G-UE. In the case of the variation of Proposal 1-1, the operation of detecting 6G-SSB in the MRSS band and the 6G-dedicated band may be the same between bands. In the case of the variation of Proposal 1-1, the operation of reading SIB1 for 6G in the MRSS band and the 6G-dedicated band may be the same between bands. Note that in the MRSS band or the 6G-dedicated band, SIB1 contains information only for 6G. Regarding the gNB operation of transmitting NR-SSB, 6G-SSB, NR-SIB1, and 6G-SIB1 in the variation of Proposal 1-1, the gNB transmits one SSB for both NR and 6G. In addition, the gNB transmits two SIB1s for both NR and 6G.

[0179] The main idea of ​​Proposal 1-2 is the introduction of a new 6G-PSS. Furthermore, SSB and SIB1 are shared. In Proposal 1-2, the operation of detecting 6G-SSB in the MRSS band and the 6G-only band may be the same between bands. In Proposal 1-2, the operation of reading 6G-specific SIB1 in the MRSS band and the 6G-only band is not the same between bands. For example, in the MRSS band, SIB1 contains information for both NR and 6G. In the 6G-only band, SIB1 contains information only for 6G. Regarding the gNB operation of transmitting NR-SSB, 6G-SSB, NR-SIB1, and 6G-SIB1 in Proposal 1-2, the gNB transmits one SSB / PBCH for both NR and 6G. The gNB then transmits two PSS for the two systems. In addition, the gNB transmits one SIB1 for both NR and 6G. Note that this SIB1 includes the settings for the two systems.

[0180] The main idea of ​​the variation of Proposal 1-2 is that SSB is shared but SIB1 is not shared. In the case of the variation of Proposal 1-2, the operation of detecting 6G-SSB in the MRSS band and the 6G dedicated band may be the same between bands. In the case of the variation of Proposal 1-2, the operation of reading SIB1 for 6G in the MRSS band and the 6G dedicated band may be the same between bands. Note that in the MRSS band or the 6G dedicated band, SIB1 contains information only for 6G. Regarding the operation of the gNB transmitting NR-SSB, 6G-SSB, NR-SIB1, and 6G-SIB1 in the variation of Proposal 1-2, the gNB transmits two SSBs and two SIB1s for the two systems, NR and 6G.

[0181] The main idea of ​​Proposals 1-3 is the introduction of an additional sequence and the sharing of SSB and SIB1. In Proposals 1-3, the operation of detecting 6G-SSB in the MRSS band and the 6G-only band is not the same between bands. Note that detecting the additional sequence is not required in the 6G-only band. In Proposals 1-3, the operation of reading SIB1 for 6G in the MRSS band and the 6G-only band is not the same between bands. For example, in the MRSS band, SIB1 contains information for both NR and 6G. In the 6G-only band, SIB1 contains information only for 6G. Regarding the gNB operation of transmitting NR-SSB, 6G-SSB, NR-SIB1, and 6G-SIB1 in Proposals 1-3, the gNB transmits one SSB for both NR and 6G systems and transmits an additional sequence for 6G. Then, the gNB transmits one SIB1 for NR and 6G. Note that this SIB1 includes the settings for the two systems.

[0182] As described above, Proposal 1 describes a design in which SSBs are shared between NR and 6G. In Proposal 1, the 6G-UE receives the shared SSB and controls 6G communications (e.g., random access control) based on the received shared SSB. Also, in Proposal 1, the gNB transmits the shared SSB and controls 6G communications (e.g., random access control) based on the transmitted shared SSB. As a result, the SSB is shared, so that the transmission of SSBs for 6G can be reduced and interference between NR and 6G can be avoided. Note that in the shared SSB, at least one of the signals (e.g., PSS / SSS / PBCH) constituting the SSB may be shared between NR and 6G.

[0183] <UE capability in Proposal 1> As the UE capability, the capability regarding whether or not at least one of the following is supported may be reported from the UE to the network, etc. Whether or not at least one of shared PSS / SSS / PBCH and / or shared CORESETZERO / SIB1 / other SIB is supported between NR in a specific band Whether or not at least one of PSS / SSS / PBCH and / or CORESETZERO / SIB1 / other SIB shared between NR and 6G is supported

[0184] <Proposal 2> Proposal 1 above describes the design of shared SSB to avoid interference from NR to 6G-UE. Proposal 2 describes the avoidance of interference from NR to 6G-UE for other differentiated settings / resources other than SSB for 6G-UE. For example, the other differentiated settings / resources are at least one of the settings / resources of RACH, CORESETZERO, SIB1, and SIBx.

[0185] Proposal 2 considers shared designs for channels / settings / resources other than SSB.

[0186] <Proposal 2-1> Proposal 2-1 describes a common RACH resource configuration in SIB1 for NR and 6G-UE. In Proposal 2-1, the same PRACH procedure for Msg1 and Msg2 / RAR is performed for NR-UE and 6G-UE. In other words, the common RACH resource configuration in SIB1 for NR and 6G-UE may be considered as a shared RACH configuration. The RACH configuration shared between NR and 6G may be referred to as a shared RACH configuration.

[0187] An instruction from a 6G-UE (a UE having 6G capability) is transmitted to the NW via Msg 3. Msg 4 is transmitted from the NW for RRC setup and conveys the configuration of a serving cell for the 6G-UE.

[0188] Below, each option of Proposal 2-1 will be explained with reference to FIG.

[0189] Figure 20 is a diagram showing an example of the procedure of each option in Proposal 2-1. Each option in Figure 20 shows an example of messages transmitted and received by the 5G-RAN, 6G-RAN, and 6G-UE in the PRACH procedure. Note that the 5G-RAN and 6G-RAN may be examples of NW. The 5G-RAN and 6G-RAN may be replaced with 5G-gNB and 6G-gNB, respectively. Furthermore, the 5G-gNB and 6G-gNB may be replaced with gNB without distinction.

[0190] <Option 1 of Proposal 2-1> Msg4 is transmitted from the 5G-RAN. Msg4 includes only 6G cell-specific configuration. In other words, Msg4 includes 6G cell-specific configuration and does not include UE-specific configuration for the 6G-UE. The 6G cell-specific configuration may be interpreted as cell-specific configuration for the 6G-UE. Note that here, the delay between Msg4 and communication between the 6G-RAN (Radio Access Network) and the 6G-UE may be increased.

[0191] Option 1 will be described with reference to FIG.

[0192] As shown in Option 1 of Fig. 20, first, advance coordination is performed between the 5G-RAN and the 6G-RAN (S401), and then the 5G-RAN transmits a (shared) SBB (S402).

[0193] The 6G-UE that has received the SSB receives the (shared) RACH configuration (RACH config in FIG. 20) in the SIB1 (S403). The 6G-UE transmits a (shared) Msg1 to the 5G-RAN (S404).

[0194] The 5G-RAN that receives Msg1 transmits Msg2 corresponding to Msg1 to the 6G-UE (S405).

[0195] The 6G-UE that has received Msg2 transmits Msg3 to the 5G-RAN (S406). Here, the transmitted Msg3 includes an indication from the 6G-UE (a UE having 6G capability) ("6G-capability indication" in FIG. 20). This indication may indicate that the sender of the indication is a 6G-UE.

[0196] The 5G-RAN that has received Msg3 transmits Msg4 (S407). The transmitted Msg4 includes only 6G cell-specific configuration.

[0197] Then, coordination is performed between the 5G-RAN and the 6G-RAN (S408), and a connection is established between the 6G-UE and the 6G-RAN, and communication is performed (S409).

[0198] <Option 2 of Proposal 2-1> Msg 4 is sent from the 5G-RAN. Msg 4 includes cell-specific configuration and UE-specific configuration for the 6G-UE. In Option 2, coordination is requested between the 5G-RAN and the 6G-RAN after Msg 3 and before Msg 4.

[0199] Option 2 will be described with reference to Fig. 20. In Fig. Option 2, the same steps as those in Option 1 are given the same numbers and descriptions thereof will be omitted.

[0200] In option 2, after the 5G-RAN receives Msg 3 (after S406) and before transmitting Msg 4, the 5G-RAN recognizes that the sender of Msg 3 is a 6G-UE and coordinates with the 6G-RAN (S501). Then, the 5G-RAN transmits Msg 4 (S502). Msg 4 here includes cell-specific settings and UE-specific settings for the 6G-UE.

[0201] <Option 3 of Proposal 2-1> Msg 4 is sent from the 6G-RAN. Msg 4 includes cell-specific and UE-specific configurations for the 6G-UE. In option 3, coordination is required between the 5G-RAN and the 6G-RAN, for example, after Msg 3.

[0202] Option 3 will be described with reference to Fig. 20. Note that in option 3, the same steps as those in option 1 and option 2 are given the same numbers, and descriptions thereof will be omitted.

[0203] In option 3, after the 5G-RAN receives Msg 3 (after S406) and before transmitting Msg 4, the 5G-RAN recognizes that the sender of Msg 3 is a 6G-UE and performs coordination with the 6G-RAN (S601). Then, in option 3, the 6G-RAN transmits Msg 4 (S602). Msg 4 here includes cell-specific configuration and UE-specific configuration for the 6G-UE.

[0204] Note that SSB and / or SIB1 may be completely shared or partially shared between NR and 6G-UE. Proposal 1 may be applied to the sharing of SSB and / or SIB1. Note that SIB1 may include Type0 / 0A / 0B / 1 / 2-PDCCH CSS.

[0205] The differences between Option 2 and Option 3 in terms of "coordination" are as follows:

[0206] In option 3, the 5G-RAN sends information about the 6G-UE to the 6G-RAN, the 6G-RAN prepares 6G cell configuration, sends Msg 4 to the UE, and the 6G-RAN then sends a status indication to the 5G-RAN indicating completion of the 6G-UE.

[0207] In option 2, the 5G-RAN sends the 6G-UE information to the 6G-RAN, and the 6G-RAN prepares the 6G cell configuration and sends the information to the 6G-RAN. In option 2, delays may occur between Msg3 and Msg4, and between Msg4 and connection / communication with the 6G-RAN.

[0208] In the above Option 2 / 3, a separate parameter "ra-ContentionResolutionTimer" may be provided for 6G. Note that the "ra-ContentionResolutionTimer" provided for 6G may have a value larger than NR. This parameter is also under SIB1 for 6G and is transmitted to 6G-UE. For example, SIB1 for 6G includes this parameter and is transmitted to 6G-UE. In this case, Proposal 1 may be applied to the transmission to 6G-UE. The value required for Option 2 may be even larger than that for Option 3.

[0209] As a variation of Option 3, Msg4 transmission includes PDCCH transmission and PDSCH transmission, and is divided between 5G-RAN and 6G-RAN. The configuration of PDCCH transmission may follow the configuration of NR or the configuration of 6G. For example, even if PDCCH is transmitted from 6G-RAN, the configuration of PDCCH transmission may follow the configuration of NR or the configuration of 6G.

[0210] When PDCCH transmission follows NR settings, resource occupancy by PDCCH transmission needs to be adjusted for all 5G-UEs and 6G-UEs, so transmission from 6G-RAN may be equivalent to transmission from 5G-RAN.

[0211] <Proposal 2-2> Proposal 2-2, like Proposal 2-1, describes a common RACH resource configuration in SIB1 for NR and 6G-UE. However, in Proposal 2-2, there is a RACH resource dedicated for a new use from the RACH resource for NR. The RACH resource dedicated for the new use is used by 6G-UE. Furthermore, the new use may be, for example, at least one of the following: reuse of signaling of the RACH configuration designed for the two-step RACH, on-demand SI transmission, repetition of Msg3, repetition of PRACH, and other uses in NR. The RACH resource dedicated for the new use may be RO and / or preamble.

[0212] The final role in Proposal 2-2 is to provide 6G-UE with a dedicated RACH resource. The difference from Proposal 1 is that the overall RACH resource configuration is obtained from the NR, and some dedicated RACH resources are further designated for dedicated uses, as well as other uses of the NR. Here, the new uses are used by 6G-capable UEs. In this case, there is no NR-UE using the dedicated RACH resource for a new use, so there is no interference from the NR to the 6G-RACH. For 6G, interference can be avoided more easily compared to a separate SIB1 / RACH configuration.

[0213] Figure 21 is a diagram showing an example of the procedure of Proposal 2-2. Figure 21 shows examples of messages transmitted and received by the 5G-RAN, 6G-RAN, and 6G-UE in the PRACH procedure. Note that in Figure 21, the same procedures as those of any of Option 1 to Option 3 in Figure 20 are numbered the same and descriptions thereof are omitted.

[0214] After receiving the SSB, the 6G-UE receives the (shared) RACH configuration (RACH config in FIG. 20) in SIB1 (after S403), and then the 6G-UE transmits a dedicated Msg1 to the 6G-RAN (S701).

[0215] The 6G-RAN that receives Msg1 transmits Msg2 corresponding to Msg1 to the 6G-UE (S702).

[0216] The 6G-UE that has received Msg2 transmits Msg3 to the 6G-RAN (S703). The 5G-RAN that has received Msg3 transmits Msg4 (S704). Then, a connection is established between the 6G-UE and the 6G-RAN, and communication is performed (S705).

[0217] The setting of PDCCH transmission for scheduling of Msg2 / 4 may follow the setting of NR or the setting of 6G. For example, even when the PDCCH for scheduling of Msg2 / 4 is transmitted from 6G-RAN, the setting of PDCCH transmission may follow the setting of NR or the setting of 6G.

[0218] When PDCCH transmission follows the NR configuration, it is necessary to adjust resource occupancy by PDCCH transmission for all 5G-UEs and 6G-UEs, so transmission from 6G-RAN may be equivalent to transmission from 5G-RAN. On the other hand, when PDCCH transmission follows the 6G configuration, for example, using Proposal 1, it is sufficient to operate by pre-adjusting resources.

[0219] As described above, Proposal 2 describes a design in which channels / settings / resources other than SSB are shared between NR and 6G. In Proposal 2, for example, a 6G-UE receives a RACH setting common to NR and 6G, and controls 6G communications (e.g., random access control) based on the received RACH setting. Also, in Proposal 2, a gNB transmits a RACH setting common to NR and 6G, and controls 6G communications (e.g., random access control) based on the transmitted RACH setting common to NR and 6G. As a result, SSB is shared, so the transmission of RACH settings for 6G can be reduced, and interference between NR and 6G can be avoided. Note that the RACH setting may be replaced with other channels / settings / resources, etc., as shown in Proposal 2.

[0220] <Variations of Proposal 2> The two-step RACH may be extended as in Proposal 2-1 and Proposal 2-2 above to support MRSS. For example, in Proposal 2-1, in the two-step RACH, a 6G-compatible indication is transmitted via MsgA. For example, in Proposal 2-2, in the two-step RACH, some RACH resources and / or PUSCH payload resources are configured exclusively for new uses from the RACH configuration for NR. Note that some RACH resources and / or PUSCH payload resources are used by 6G-UE. Furthermore, some RACH resources may be RO and / or preambles.

[0221] <UE capability in Proposal 2> As the UE capability, a capability regarding the support or non-support of at least one of the following may be reported from the UE to the network etc. Common SIB1 / RACH setting for NR and 6G Common SIB1 / RACH setting for NR and 6G including some RACH resources dedicated to new applications used by 6G Individual SIB1 / RACH setting for 6G from NR Transmission of Msg3 including UE capability regarding an instruction to instruct the NW to support 6G Reception of Msg4 having cell-specific settings for 6G Reception of Msg4 having both cell-specific and UE-specific settings for 6G

[0222] <Proposal 3> Proposal 1 above describes a design for shared SSB. Proposal 2 describes a design for other distinguished configurations / resources other than SSB for 6G-UE. The other distinguished configurations / resources are at least one configuration / resource of RACH, CORESETZERO, SIB1, and SIBx. Proposal 2 exemplarily describes a design for a shared RACH. Proposal 3 describes a method for using 6G periodic signaling (SSB / SIB1 / SIBx / corresponding PDCCH, etc.) as spare transmission or on-demand transmission (infrequent transmission).

[0223] Proposal 3 describes a method for reducing the transmission of signals for 6G to avoid interference between NR and 6G. Illustratively, the transmission of signals for 6G is reduced by adjusting the transmission period of periodic signals for 6G and / or by transmitting signals for 6G on demand in response to a request from a 6G-UE or the like instead of periodically transmitting the signals for 6G.

[0224] Note that Proposal 3 described below may be combined with Proposal 1 and / or Proposal 2. By combining them, interference avoidance between 6G and NR can be achieved in a better manner.

[0225] <Proposal 3-1> In Proposal 3-1, the frequency of transmitting 6G signals is reduced by adjusting the transmission cycle of periodic 6G signals.

[0226] <Option 1 of Proposal 3-1> In Option 1, the default period of the SSB and / or SIB1 for 6G in the MRSS frequency is predefined as a period longer than the default period of the SSB and / or SIB1 for 6G in a normal 6G cell in another 6G-dedicated frequency. Note that the default period of the SSB and / or SIB1 for 6G in the MRSS frequency may be at least one of, for example, 40 ms, 80 ms, 160 ms, etc. For example, if the default period of the SSB and / or SIB1 for 6G in a normal 6G cell in a 6G-dedicated frequency is 40 ms, the default period of the SSB and / or SIB1 for 6G in the MRSS frequency is predefined as a period longer than 40 ms.

[0227] <Option 2 of Proposal 3-1> In Option 2, when SIB1 / new NR-SIB-y from NR provides 6G configuration as shown in Proposal 1 above, the configured periodicity is longer than the configured periodicity in normal 6G cells in other 6G-dedicated frequencies. Note that the 6G configuration may be 6G-SSB configuration and / or 6G-SIB1 / SIBx configuration.

[0228] In this option 2, at least a portion of the 6G-SSB / SIB1, etc. may be shared with the NR. Alternatively, in this option 2, at least a portion of the 6G-SSB / SIB1, etc. may be dedicated to 6G.

[0229] <Option 3 of Proposal 3-1> In Option 3, 6G configuration in the MRSS frequency is provided by another 6G cell in another frequency. For example, 6G configuration in the MRSS frequency is provided via SIB / RRC signaling. Furthermore, in Option 3, the configured period for 6G configuration in the MRSS frequency is longer than the configured period for a normal 6G cell in a frequency dedicated to 6G. Note that the 6G configuration may be 6G-SSB configuration and / or 6G-SIB1 / SIBx configuration.

[0230] FIG. 22 is a diagram showing an example of Proposal 3-1. Two scenarios are shown in FIG. 22. In each scenario, the horizontal axis represents the time axis. Each scenario illustrates the transmission timing of a signal for NR (e.g., NR-SSB) at the MRSS frequency and the transmission timing of a signal for 6G (e.g., 6G-SSB).

[0231] In scenario 1, the 6G transmission period is set longer. This period may be predefined, indicated by the NR SIB, or provided by another 6G cell, as shown in each of the above options. Also, in scenario 1, the resources of the NR-SSB (and / or CORESETZERO / SIB1) and the resources of the 6G-SSB (and / or CORESETZERO / SIB1) overlap.

[0232] In scenario 2, similar to scenario 1, the 6G transmission period is set longer. As shown in each of the above options, this period may be predefined, indicated by the NR SIB, or provided by another 6G cell. Also, in scenario 2, the resources of the NR-SSB (and / or CORESETZERO / SIB1) and the resources of the 6G-SSB (and / or CORESETZERO / SIB1) do not overlap.

[0233] In the case of Proposal 3-1, the 6G cell of the MRSS is not used for a PCell (primary cell) having initial access, and in this case, the 6G cell of the MRSS may be configured as a SCell (secondary cell) in CA / DC (carrier aggregation / dual connectivity) operation.

[0234] As described above, in Proposal 3-1, by adjusting the transmission period of periodic signals for 6G, the frequency of transmission of signals for 6G can be reduced, thereby avoiding interference between signals for NR and signals for 6G.

[0235] <Proposal 3-2> Proposal 3-2 describes an example in which a 6G-UE requests on-demand transmission, and the NW transmits a signal for 6G in response to the request.

[0236] <Option 1 of Proposal 3-2> In Option 1, after the 6G-UE reads the NR-SSB and NR-SIB1, it transmits a 6G-capability indication or a triggering request in Msg 3 to the 6G-UE, requesting on-demand transmission of the 6G-SSB and / or 6G-SIB1 and / or 6G-SIBx. Note that, as shown in Proposal 1, the NR-SSB and NR-SIB1 may be a shared SSB / SIB1 shared between the NR and 6G. Also, as shown in Proposal 2, Msg 3 may be a shared RACH shared between the NR and 6G.

[0237] As a UE operation after the request, it is assumed that the UE receives an ACK confirmation regarding the request from the NW in Msg4.

[0238] After X ms (X is a real number equal to or greater than 0) have elapsed since the transmission of Msg3 or the ACK confirmation of Msg4, the UE assumes on-demand 6G-SSB transmission and / or 6G-SIB1 / SIBx transmission. For example, after X ms have elapsed since the transmission of Msg3 or the ACK confirmation of Msg4, the UE assumes on-demand 6G-SSB transmission and / or 6G-SIB1 / SIBx transmission Y times or Y periods (Y is a real number equal to or greater than 0). Alternatively, after X ms have elapsed since the transmission of Msg3 or the ACK confirmation of Msg4, the UE assumes on-demand 6G-SSB transmission and / or 6G-SIB1 / SIBx transmission in a predefined or preset time window. Note that, although an example in which on-demand transmission is assumed after the lapse of X ms has been shown, "ms" may be replaced with other time units.

[0239] As with Proposal 1, 6G-SSB may be shared with NR or may be dedicated to 6G.

[0240] In Option 1, only on-demand 6G-SIB1 / SIBx may be supported, or on-demand transmission of both 6G-SSB and 6G-SIB1 / SIBx may be possible. Note that if only on-demand 6G-SIB1 / SIBx is supported, 6G-SSB may always be transmitted as a shared SSB or as a dedicated SSB.

[0241] Settings related to 6G-SSB and / or 6G-SIB1 / SIBx may be provided in NR-SIB1 or Msg4. The settings related to 6G-SSB may include at least one of "ssb-PositionsInBurst" and "ssb-Periodicity." "ssb-PositionsInBurst" indicates the time domain position of the SSB, and "ssb-Periodicity" indicates the period of the SSB. Information related to the transmission timing for the on-demand transmission (e.g., Y times / Y periods or the length of the time window) may be provided in NR-SIB1 or Msg4.

[0242] As a variation, the above configuration may be provided by another 6G cell in another 6G-dedicated frequency, for example, via SIB / RRC signaling. In this case, the 6G cell of the MRSS is not used for the PCell with initial access, and in this case, the 6G cell of the MRSS may be configured as the SCell in CA / DC operation.

[0243] Whether or not to support on-demand SSB / SIB1 / SIBx transmission for 6G in an MRSS frequency may be predefined or may be indicated by NR in the same MRSS frequency. If indicated by NR, the indication is made via at least one of NR-MIB, NR-SIB1, and NR-SIBx.

[0244] As a variation, in addition to the request indication, further information may be sent together with the request indication via Msg 3. For example, the further information may include information about the time of on-demand transmission (e.g., length of preferred time window, preferred number / period).

[0245] FIG. 23 is a diagram showing an example of Option 1 of Proposal 3-2. Two cases are shown in FIG. 23. In each case, the horizontal axis represents the time axis. Each case illustrates the transmission timing of a signal for NR (e.g., NR-SSB) at the MRSS frequency and the transmission timing of a signal for 6G (e.g., 6G-SSB and 6G-SIB1 / SIBx). Note that in FIG. 23, NR-SSB, 6G-SSB, and 6G-SIB1 / SIBx are displayed in different ways. Note that NR-SIB1 / SIBx is omitted in FIG. 23.

[0246] Case 1 corresponds to scenario 1 in FIG. 22, and is a case where overlap exists. Case 1 is also a case where on-demand 6G-SSB is supported. In this case 1, after reading the NR-SSB, the 6G-UE transmits a request in Msg 3 and obtains an ACK confirmation in Msg 4. Then, after X ms have elapsed since receiving Msg 4, the 6G-UE transmits on-demand 6G-SSB within the time window. Note that case 1 in FIG. 23 may be interpreted as an example in which on-demand transmission is performed for four cycles.

[0247] Case 2 corresponds to scenario 2 in FIG. 22, and is a case where there is no overlap. Also, case 2 is a case where on-demand 6G-SIB1 / SIBx is supported. In case 2, after reading the 6G-SSB, the 6G-UE transmits a request in Msg3 and obtains an ACK confirmation in Msg4. Then, after X ms have elapsed since receiving Msg4, the 6G-UE transmits on-demand 6G-SIB1 / SIBx within the time window. Note that case 1 in FIG. 23 may be interpreted as an example where on-demand transmission is performed for four cycles.

[0248] <Option 2 of Proposal 3-2> In Option 2, the 6G-UE reads the NR-SSB and NR-SIB1, and then acquires a common RACH resource configuration for the NR and the 6G-UE. Note that, as shown in Proposal 1, the NR-SSB and NR-SIB1 may be a shared SSB / SIB1 shared with the NR. Also, as shown in Proposal 2, Msg3 may be a shared RACH shared with the NR. On the other hand, from the RACH resources for NR, there are RACH resources dedicated for the new use of requests for on-demand transmission for 6G. Note that the RACH resources dedicated for the new use are used by the 6G-UE. The new use may be, for example, at least one of reuse of RACH configuration signaling designed for two-step RACH, on-demand SI transmission, Msg3 repetition, PRACH repetition, and other uses in NR. The RACH resource dedicated for the new use may be RO and / or preamble.

[0249] The 6G-capable UE selects a dedicated RACH resource for the new purpose for transmitting Msg1, indicating the triggering of a request for on-demand transmission of 6G-SSB and / or 6G-SIB1 and / or 6G-SIBx.

[0250] As a UE operation after the request, it is assumed that the UE receives an ACK confirmation regarding the request from the NW in Msg2 / 4.

[0251] After X ms (X is a real number equal to or greater than 0) have elapsed since the transmission of Msg1 or the ACK confirmation of Msg2 / 4, the UE assumes on-demand 6G-SSB transmission and / or 6G-SIB1 / SIBx transmission. For example, after X ms have elapsed since the transmission of Msg1 or the ACK confirmation of Msg2 / 4, the UE assumes on-demand 6G-SSB transmission and / or 6G-SIB1 / SIBx transmission Y times or Y periods (Y is a real number equal to or greater than 0). Alternatively, after X ms have elapsed since the transmission of Msg3 or the ACK confirmation of Msg4, the UE assumes on-demand 6G-SSB transmission and / or 6G-SIB1 / SIBx transmission in a predefined or preset time window. Note that, although an example in which on-demand transmission is assumed after the lapse of X ms has been shown, "ms" may be replaced with other time units.

[0252] The settings related to 6G-SSB and / or 6G-SIB1 / SIBx may be provided in NR-SIB1 or in Msg 4. The settings related to 6G-SSB may include at least one of "ssb-PositionsInBurst" and "ssb-Periodicity." Furthermore, information regarding the transmission timing for the on-demand transmission (e.g., Y times / Y periods or the length of the time window) may be provided in NR-SIB1 or in Msg 4.

[0253] As a first variation, at least one of the configurations, including the above configurations, may be provided by another 6G cell in another 6G-dedicated frequency. For example, at least one of the configurations, including the above configurations, may be provided via SIB / RRC signaling. Note that the configurations, including the above configurations, may include a dedicated RACH resource configuration for the new application. In this case, the 6G cell of the MRSS is not used for the PCell with initial access. In this case, the 6G cell of the MRSS may be configured as the SCell in CA / DC operation.

[0254] As a variation 2, the 6G-RACH resource configuration may be provided by a 6G-SIB1 transmitted in the same PDSCH as the NR-SIB1. Alternatively, the 6G-RACH resource configuration may be provided by a 6G-SIB1 transmitted in a dedicated 6G-SIB1 PDSCH. In this case, on-demand transmission is 6G-SIBx only.

[0255] Fig. 24 is a diagram showing examples of system information for Option 2 and Variation 2 of Proposal 3-2. Fig. 24 shows three examples of the relationship between PDSCH and SIB.

[0256] In Example 1 of Figure 24, as shown in Option 2 of Proposal 3-2, the RACH resource for NR ("RACH configuration for NR" in Example 1 of Figure 24) has a RACH resource that is dedicated for new uses of requests for on-demand transmission for 6G.

[0257] Example 2 in Figure 24 corresponds to one of Variation 2 of Option 2 in Proposal 3-2. As shown in Example 2, the 6G-RACH resource configuration ("RACH configuration for NR" in Example 2 in Figure 24) is provided by 6G-SIB1 ("SIB1 for 6G" in Example 2 in Figure 24) transmitted on the same PDSCH as NR-SIB1 ("SIB1 for NR" in Example 2 in Figure 24).

[0258] Example 3 of Figure 24 corresponds to one of Variation 2 of Option 2 of Proposal 3-2. As shown in Example 2, the 6G-RACH resource configuration ("RACH configuration for NR" in Example 3 of Figure 24) is provided by a 6G-SIB1 ("SIB1 for 6G" in Example 2 of Figure 24) transmitted in the same PDSCH as a dedicated 6G-SIB1 PDSCH ("PDSCH for 6G-SIB1 only" in Example 3 of Figure 24). The 6G-RACH resource configuration is provided in a 6G-SIB1 transmitted in the dedicated 6G-SIB1 PDSCH.

[0259] As a variation 3, a larger group of dedicated RACH resource configurations may be provided, supporting indication of information regarding the time of on-demand transmission (e.g., length of preferred time window, preferred number / period).

[0260] As described above, in Proposal 3-2, by transmitting 6G signals on demand from the network in response to a request from a 6G-UE, the frequency of transmitting 6G signals can be reduced, and interference between NR signals and 6G signals can be avoided.

[0261] <Variations of Proposal 3> The two-step RACH may be extended to support MRSS, as in Proposal 3-2 above. For example, in Proposal 3-2, in the two-step RACH, the on-demand request indication is transmitted via MsgA. For example, the on-demand transmission request indication is transmitted via the preamble of MsgA and / or the MsgA PUSCH.

[0262] In Proposal 3-2, in the two-step RACH configuration for NR, there are some RACH resources and / or PUSCH payload resources dedicated for new uses of requests for on-demand transmission for 6G. Note that some RACH resources may be RO and / or preambles.

[0263] A longer delay may be required to receive the ACK confirmation of Msg2 / 4. In the case of sending an on-demand request via Msg1 / 3, the RACH configuration may provide for larger values ​​of "ra-ResponseWindow" and / or "ra-ContentionResolutionTimer".

[0264] As described above, Proposal 3 describes a method for reducing the transmission of 6G signals, information, channels, settings, resources, etc. In Proposal 2, for example, the 6G-UE receives 6G-SSB and / or 6G-SIB1 transmitted at a specific transmission timing, and controls 6G communications (e.g., random access control) based on the 6G-SSB and / or 6G-SIB1. Also, in Proposal 3, the gNB transmits 6G-SSB and / or 6G-SIB1 at a fixed transmission timing, and controls 6G communications (e.g., random access control) based on the transmitted 6G-SSB and / or 6G-SIB1. This allows for the reduction of 6G signals, information, channels, settings, resources, etc., such as 6G-SSB and / or 6G-SIB1, and avoids interference between the NR and 6G. Note that, according to Proposal 3-1, the specific timing is a timing based on a long transmission period. Furthermore, according to Proposal 3-2, the specific timing is a timing based on a request from the 6G-UE.

[0265] <UE capability in Proposal 3> As UE capability, capability regarding support or non-support of at least one of the following may be reported from the UE to the network, etc.: Configuration of 6G at MRSS frequencies provided by other 6G cells or NR cells Configuration of 6G-SSB and / or 6G-SIB1 / SIBx at MRSS frequencies provided by other 6G cells or NR cells UE request for on-demand transmission of at least one of 6G-SSB, 6G-SIB1, and 6G-SIBx via at least one of Msg1, Msg3, and MsgA UE capability of a minimum request for information regarding the time of one on-demand transmission UE reception of ACK confirmation regarding the request from Msg2 and / or Msg4

[0266] <Note 0> In this disclosure, "beam" may be replaced with "SSB," "CSI-RS," "TRS," "SRS," "other reference signal," and any of DL / UL / joint TCI states.

[0267] L1-RSRP / L1-SINR may be replaced with L1-RSRQ / L3-RSRP / L3-SINR / L3-RSRQ / filtered L1 measurement / enhanced L1 measurement.

[0268] <Note 1: UE capability> A UE may report at least one of the following capabilities. For example, a UE may report a capability to a network (e.g., a base station). A capability may indicate, for example, whether a proposal (or an option of a proposal, or an alternative of a proposal) is supported. - Capability of each proposal - Capability of each option of a proposal - Capability of a combination of two or more options of a proposal - Capability of each alternative of a proposal - Capability of a combination of two or more alternatives of a proposal

[0269] The UE may report the above capabilities for each frequency. Capabilities may be reported for each UE. Capabilities may be reported for each of FR (frequency range) 1, FR2, FR2-1, FR2-2, and FR3. Capabilities may be reported for each SCS (subcarrier spacing). Capabilities may be reported for each band. Capabilities may be reported for each BC (band combination). Capabilities may be reported for each FC (frequency combination). Capabilities may be reported for each FSPC (Feature Set Per Component-carrier).

[0270] The UE may report the above capabilities for each cell. For example, capabilities may be reported for each UE. Capabilities may be reported for each cell. Capabilities may be reported for each TDD (time division duplex). Capabilities may be reported for each FDD (frequency division duplex). Capabilities may be reported for each TDD and FDD.

[0271] <Note 2: Method for selecting options and combinations> With regard to the present disclosure, at least one of whether to apply a proposal, which proposal to apply, which option (or multiple options) to use, and which alternative (or multiple alternatives) to use may be set by a parameter of a higher layer, may be determined by a parameter of a related higher layer, may be indicated by a MAC CE or DCI, may be determined based on a capability of the UE, or may be defined by a specification. Furthermore, at least one of whether to apply a proposal, which proposal to apply, which option (or multiple options) to use, and which alternative (or multiple alternatives) to use may be based on a condition described in a specification. Furthermore, at least one of whether to apply a proposal, which proposal to apply, which option (or multiple options) to use, and which alternative (or multiple alternatives) to use may be based on a condition described in a specification. Furthermore, at least one of whether to apply a proposal, which proposal is applied, which option(s) to use, and which alternative(s) to use may be determined by at least one of higher layer parameter configuration, MAC CE, DCI, and reported UE capability, or may be determined by a combination of the above.

[0272] In the present disclosure, multiple options and / or multiple alternatives may be combined into one option or one alternative.

[0273] In this disclosure, "Serving" may be replaced with any of "Serving Beam / SpCell", "Serving Beam", "SpCell", and "Serving SpCell".

[0274] <Note 3: Example of signaling from NW to UE> In the present disclosure, a UE may receive at least one of the following types of information from a NW (network). Note that the NW may be replaced by a gNB or a base station. Information via higher layer signaling (e.g., an RRC message, an LPP (LTE Positioning Protocol) message) MAC CE MAC CE having a new LCID (logical channel ID) in the subheader MAC CE extended from an existing MAC CE (e.g., introduction of a new octet) DCI DCI having an existing DCI field and / or a newly introduced DCI field DCI having a CRC (cyclic redundancy check) scrambled by an existing RNTI (Radio Network Temporary Identifier) ​​and / or a newly introduced RNTI DCI having an existing DCI format or a newly introduced DCI format Information of a combination of the above

[0275] In the present disclosure, the UE may receive information of at least one of the following periodic types from the NW: Option 1: Periodically Option 2: Semi-persistent Option 3: Aperiodic Note that the information of type Option 2 or Option 3 may be triggered by the UE or by an instruction from the gNB.

[0276] <Note 4: Example of signaling from UE to NW> In the present disclosure, the UE may report at least one of the following types of information to the NW. Note that the NW may be replaced by a gNB or a base station. Information via higher layer signaling (e.g., RRC message, LPP (LTE Positioning Protocol) message) MAC CE MAC CE with a new LCID (logical channel ID) in the subheader MAC CE extended from existing MAC CE (e.g., introduction of a new octet) UCI ​​UCI of PUCCH or UCI of PUSCH Information of a combination of the above

[0277] In the present disclosure, the UE may report information of at least one of the following periodicity types to the NW: Option 1: Periodically Option 2: Semi-persistent Option 3: Aperiodic Note that the information of type Option 2 or Option 3 may be triggered by the UE or by an instruction from the gNB.

[0278] In this disclosure, "detect," "acquire," "decode," "receive," and "monitor" may be interchangeable, and "signal," "information," "channel," "data," and "configuration" may be interchangeable.

[0279] In the present disclosure, A / B may mean at least one of A and B. In the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0280] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0281] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0282] The physical layer signaling may be, for example, downlink control information (DCI).

[0283] In the present disclosure, "A overlaps with B," "A overlaps with B," and "at least a portion of A overlaps with at least a portion of B" may be read as interchangeable. Also, "A overlaps with B," and "all or a portion of A overlaps with all or a portion of B" may be read as interchangeable.

[0284] The present disclosure may be applied under at least one of the following conditions: when a UE reports UE capabilities corresponding to at least one function / capability to a NW; and when a UE capability corresponding to at least one function / capability is configured / activated / instructed to the UE by higher layer signaling. The present disclosure may be applied when a specific higher layer parameter is configured / activated / instructed to the UE.

[0285] Next, the configurations of the base station 100 and the terminal 200 will be described. Note that the configurations of the base station 100 and the terminal 200 described below are examples of functions related to this embodiment. The base station 100 and the terminal 200 may have functions not shown. Furthermore, the functional divisions and / or names of the functional units are not limited as long as the functions perform the operations related to this embodiment.

[0286] <Configuration of Base Station> Fig. 25 is a block diagram showing an example of the configuration of base station 100 according to the embodiment. Base station 100 includes, for example, a transmitting unit 101, a receiving unit 102, and a control unit 103. Base station 100 communicates with terminal 200 (see Fig. 26) wirelessly.

[0287] The transmitter 101 transmits a downlink (DL) signal to the terminal 200. For example, the transmitter 101 transmits the DL signal under the control of the controller 103. The transmitter 101 transmits, for example, the various signals, channels, setting information, control information, etc. described in the above embodiments to the terminal 200 as the DL signal.

[0288] The DL signal may include, for example, a downlink data signal and control information (e.g., DCI (Downlink Control Information)). The DL signal may also include information indicating scheduling related to signal transmission of terminal 200 (e.g., an UL grant). The DL signal may also include control information of higher layers (e.g., control information of RRC (Radio Resource Control)). The DL signal may also include a reference signal.

[0289] Channels used for transmitting DL signals include, for example, a data channel and a control channel. For example, the data channel may include a PDSCH (Physical Downlink Shared Channel), and the control channel may include a PDCCH (Physical Downlink Control Channel). For example, the base station 100 transmits control information to the terminal 200 using the PDCCH and transmits downlink data signals using the PDSCH.

[0290] The reference signal included in the DL signal may include at least one of, for example, a Demodulation Reference Signal (DMRS), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as the DMRS and PTRS are used for demodulating downlink data signals and are transmitted using the PDSCH.

[0291] The receiving unit 102 receives an uplink (UL) signal transmitted from the terminal 200. For example, the receiving unit 102 receives the UL signal under the control of the control unit 103. The receiving unit 102 receives, for example, a signal related to the PRACH and random access as the UL signal.

[0292] The control unit 103 controls the communication operations of the base station 100, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102. For example, the control unit 103 performs operations other than the transmission and reception described in the above embodiment (note that these operations may be performed by the reception unit 102 and / or the transmission unit 101).

[0293] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. The control unit 103 also outputs the data, control information, etc. received from the receiving unit 102 to the upper layer.

[0294] For example, the control unit 103 allocates resources (or channels) used for transmitting and receiving DL signals and / or resources used for transmitting and receiving UL signals based on signals (e.g., data and control information, etc.) received from the terminal 200 and / or data and control information, etc. acquired from a higher layer. Information on the allocated resources may be included in control information transmitted to the terminal 200.

[0295] Control unit 103 configures PUCCH resources as an example of allocation of resources used for transmitting and receiving UL signals. Information related to PUCCH configuration (PUCCH configuration information), such as a PUCCH cell timing pattern, may be reported to terminal 200 by RRC.

[0296] Here, the transmitting unit 101 and the receiving unit 102 (which may be collectively referred to as a communication unit) communicate with the terminal 200 .

[0297] For example, in 6G (an example of a second-generation radio access technology succeeding the first generation) that shares frequencies with 5G (an example of a first-generation radio access technology), the communication unit of base station 100 transmits a shared SSB (an example of a synchronization signal at least one of which is shared between the first-generation radio access technology and the second-generation radio access technology). The control unit 103 controls 6G communications based on the shared SSB. Here, the control of 6G communications includes resource allocation, scheduling, and the like for transmitting and receiving 6G DL and / or UL signals. The control of 6G communications also includes transmission processing of 6G DL signals and / or reception processing of 6G UL signals.

[0298] Furthermore, for example, in 6G, which shares frequencies with 5G, the communication unit of the base station 100 transmits a common RACH configuration (an example of a random access channel configuration common between the first generation radio access technology and the second generation radio access technology). The control unit 103 controls 6G communication based on the common RACH configuration.

[0299] Furthermore, for example, in 6G, which shares frequencies with 5G, the communication unit of base station 100 transmits 6G-SSB (an example of a synchronization signal in second-generation radio access technology) and / or 6G-SIB1 (an example of control information in second-generation radio access technology) at a specific transmission timing. Control unit 103 controls 6G communication based on the transmitted 6G-SSB and / or 6G-SIB1.

[0300] 26 is a block diagram showing an example of the configuration of a terminal 200 according to an embodiment. The terminal 200 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. The terminal 200 communicates with the base station 100, for example, wirelessly.

[0301] The receiving unit 201 receives a DL signal transmitted from the base station 100. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.

[0302] The transmitting unit 202 transmits an UL signal to the base station 100. For example, the transmitting unit 202 transmits the UL signal under the control of the control unit 203. For example, the transmitting unit 202 transmits a signal related to the PRACH and random access to the base station 100.

[0303] The UL signal may include, for example, an uplink data signal and control information (e.g., UCI (Uplink Control Information)). For example, information related to the processing capability of the terminal 200 (e.g., capability) may be included. The UL signal may also include a reference signal.

[0304] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channels may include a PUSCH (Physical Uplink Shared Channel), and the control channels may include a PUCCH (Physical Uplink Control Channel). For example, the terminal 200 transmits control information from the base station 100 using the PUCCH and transmits uplink data signals using the PUSCH.

[0305] The reference signal included in the UL signal may include, for example, at least one of a DMRS, a PTRS, a CSI-RS, an SRS, and a PRS. For example, the reference signal such as the DMRS or the PTRS is used for demodulating an uplink data signal and is transmitted using an uplink channel (for example, a PUSCH).

[0306] The control unit 203 controls the communication operations of the terminal 200, including the reception processing in the receiving unit 201 and the transmission processing in the transmitting unit 202. For example, the control unit 203 performs operations other than the transmission and reception described in the above embodiment (note that these operations may be performed by the receiving unit 201 and / or the transmitting unit 202).

[0307] For example, the control unit 203 acquires information such as data and control information from a higher layer and outputs the information to the transmitting unit 202. Also, the control unit 203 outputs, for example, data and control information received from the receiving unit 201 to the higher layer.

[0308] For example, the control unit 203 controls transmission of information to be fed back to the base station 100. The information to be fed back to the base station 100 may include, for example, HARQ ACK / NACK, Channel State Information (CSI), or a Scheduling Request (SR). The information to be fed back to the base station 100 may be included in UCI. The UCI is transmitted, for example, in PUCCH resources.

[0309] Control unit 203 configures PUCCH resources based on configuration information (for example, configuration information such as a PUCCH cell timing pattern and / or DCI notified by RRC) received from base station 100. Control unit 203 determines PUCCH resources to be used for transmitting information to be fed back to base station 100. Under the control of control unit 203, transmission unit 202 transmits the information to be fed back to base station 100 in the PUCCH resources determined by control unit 203.

[0310] Note that the channel used for transmitting the DL signal and the channel used for transmitting the UL signal are not limited to the above-mentioned examples. For example, the channel used for transmitting the DL signal and the channel used for transmitting the UL signal may include a Random Access Channel (RACH) and a Physical Broadcast Channel (PBCH). The RACH may be used to transmit DCI including a Random Access Radio Network Temporary Identifier (RA-RNTI), for example.

[0311] Here, the receiving unit 201 and the transmitting unit 202 (which may be collectively referred to as a communication unit) communicate with a network such as the base station 100 .

[0312] For example, in 6G (an example of a second-generation radio access technology succeeding the first generation) that shares frequencies with 5G (an example of a first-generation radio access technology), terminal 200 supports 6G, and the communication unit of terminal 200 receives a shared SSB (an example of a synchronization signal at least one of which is shared between the first-generation radio access technology and the second-generation radio access technology). Control unit 203 controls 6G communication based on the shared SSB. Here, control of 6G communication includes resource allocation, scheduling, etc. for transmitting and receiving 6G DL and / or UL signals. Control of 6G communication also includes transmission processing of 6G DL signals and / or reception processing of 6G UL signals.

[0313] Furthermore, for example, in 6G, which shares frequencies with 5G, terminal 200 supports 6G, and the communication unit of terminal 200 receives a common RACH setting (an example of a random access channel setting common between first-generation radio access technology and second-generation radio access technology). Control unit 203 controls 6G communication based on the common RACH setting.

[0314] Furthermore, for example, in 6G, which shares frequencies with 5G, terminal 200 supports 6G, and a communication unit of terminal 200 receives 6G-SSB (an example of a synchronization signal in second-generation radio access technology) and / or 6G-SIB1 (an example of control information in second-generation radio access technology) at a specific transmission timing. Control unit 203 controls 6G communication based on the received 6G-SSB and / or 6G-SIB1.

[0315] The present disclosure has been described above. Note that the division of items in the above description is not essential to the present disclosure, and items described in two or more items may be used in combination as needed, and items described in one item may be applied to items described in another item (unless they are inconsistent).

[0316] <Hardware Configuration, etc.> The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or the multiple devices.

[0317] Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0318] For example, a base station, a terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 27 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment. The above-described base station 100 and terminal 200 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, etc.

[0319] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of base station 100 and terminal 200 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0320] Each function in the base station 100 and the terminal 200 is realized by loading specified software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0321] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 103 and control unit 203 may be realized by the processor 1001.

[0322] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 103 of the base station 100 and the control unit 203 of the terminal 200 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may also be transmitted from a network via a telecommunications line.

[0323] The memory 1002 is a computer-readable recording medium and may be configured by, for example, at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0324] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0325] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitter 101, receiver 102, receiver 201, transmitter 202, etc. may be realized by the communication device 1004.

[0326] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0327] Furthermore, 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 between each device.

[0328] Furthermore, base station 100 and terminal 200 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0329] <Notification of Information, Signaling> Notification of information is not limited to the embodiments described in the present disclosure and may be performed using other methods. For example, notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB))), other signals, or a combination thereof. Furthermore, RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0330] <Applicable Systems> The embodiments described in the present disclosure are applicable to LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802.34 (WiMAX (registered trademark The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of LTE and / or LTE-A with 5G).

[0331] <Processing Procedures, etc.> The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be rearranged unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0332] <Operation of Base Station> In the present disclosure, specific operations described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, an MME or an S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0333] <Direction of Input / Output> Information, etc. (see <Information, Signal>) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may also be input / output via multiple network nodes.

[0334] <Handling of Input / Output Information, etc.> Input / output information, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, etc. may be overwritten, updated, or added. Output information, etc. may be deleted. Input information, etc. may be sent to another device.

[0335] <Determination method> The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0336] <Variations of Aspects, etc.> Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation. In addition, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0337] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0338] <Software> Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0339] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0340] Information, Signals, etc., described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0341] Note that terms described in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0342] <System, Network> As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0343] <Parameter and Channel Names> Furthermore, the information, parameters, and the like described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0344] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0345] <Base Station> In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

[0346] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a remote radio head (RRH)). The terms "cell" or "sector" refer to part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication services within that coverage area.

[0347] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0348] Mobile Station In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," and the like may be used interchangeably.

[0349] A mobile station may also be referred to by those skilled in the art as 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 terminology.

[0350] <Base Station / Mobile Station> At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0351] Furthermore, the base station in the present disclosure may be read as a terminal. For example, the embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the terminal 200 may be configured to have the functions of the base station 100 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0352] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 100 may be configured to have the functions of the terminal 200 described above.

[0353] Fig. 28 shows an example configuration of a vehicle 2001. As shown in Fig. 28, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0354] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0355] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0356] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0357] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 2012 provides various types of multimedia information and multimedia services to the occupants of the vehicle 2001 by using information acquired from external devices via the communication module 2013, etc.

[0358] The information service unit 2012 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0359] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS, etc.), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0360] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0361] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0362] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021 to 2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021 to 2029, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0363] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)).

[0364] Furthermore, the communication module 2013 stores various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, and the like provided in the vehicle 2001.

[0365] <Meaning and Interpretation of Terms> As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching a table, database, or other data structure), ascertaining something that is considered to be a "judging" or "determining," and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like that are considered to be a "judging" or "determining." Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0366] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0367] <Reference Signal> A reference signal can also be abbreviated as RS (Reference Signal), and may also be called a pilot depending on the applicable standard.

[0368] <Meaning of "based on"> As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0369] "First," "Second" Any reference to an element using designations such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0370] <Means> The "means" in the configuration of each device above may be replaced with "section," "circuit," "device," etc.

[0371] Open Format: When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0372] <Time Units such as TTI, Frequency Units such as RB, and Radio Frame Configuration> A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0373] Numerology may be a communication parameter that applies to the transmission and / or reception of a signal or channel, and may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0374] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol). A slot may be a time unit based on numerology.

[0375] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0376] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0377] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or 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 existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0378] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0379] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0380] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0381] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0382] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0383] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0384] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0385] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0386] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0387] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0388] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0389] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0390] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples, and various changes may be made to 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, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.

[0391] <Maximum Transmit Power> The "maximum transmit power" in the present disclosure may refer to the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0392] Articles In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.

[0393] <"Different"> In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that the term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0394] One aspect of the present disclosure is useful in wireless communication systems.

[0395] 100 Base station 200 Terminal 101, 202 Transmitter 102, 201 Receiver 103, 203 Controller

Claims

1. A terminal that shares frequencies with a first generation radio access technology and supports a second generation radio access technology that is a successor to the first generation, comprising: a communication unit that receives synchronization signals and / or control information in the second generation radio access technology that are transmitted at specific transmission timing; and a control unit that controls communication of the second generation radio access technology based on the synchronization signals and / or the control information.

2. The terminal according to claim 1, wherein the specific transmission timing is set based on a period longer than a period in a frequency dedicated to the second generation radio access technology.

3. The terminal according to claim 1, wherein the specific transmission timing is set based on a request from the terminal.

4. The terminal according to claim 1, wherein the communication unit receives a signal in the first generation radio access technology, and the control unit requests a synchronization signal and / or control information in the second generation radio access technology based on the signal in the first generation radio access technology.

5. A base station that supports a first generation radio access technology and a second generation radio access technology that is a successor to the first generation, sharing frequencies with the first generation radio access technology, comprising: a communication unit that transmits a synchronization signal and / or control information for the second generation radio access technology at a specific transmission timing; and a control unit that controls communication for the second generation radio access technology based on the synchronization signal and / or the control information.

6. A wireless communication method in which a terminal that shares frequencies with a first-generation wireless access technology and supports a second-generation wireless access technology that is a successor to the first-generation wireless access technology receives a synchronization signal and / or control information for the second-generation wireless access technology that is transmitted at a specific transmission timing, and controls communication of the second-generation wireless access technology based on the synchronization signal and / or the control information.

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