JP7526009B2 - Terminal device, base station device, and communication method - Google Patents

Description

The present invention relates to a terminal device, a base station device, and a communication method.

Currently, the Third Generation Partnership Project (3GPP) is conducting technical studies and formulating standards for LTE (Long Term Evolution)-Advanced Pro and NR (New Radio technology) as radio access methods and wireless network technologies for the fifth generation cellular system (Non-Patent Document 1).

The fifth-generation cellular system will feature eMBB (enhanced Mobile BroadBand) for high-speed, large-capacity transmission and URLLC (Ultra-Reliable and Low Latency) for low-latency, highly reliable communications.
Three expected scenarios for services are required: 1) mass machine type communication (mMTC) where a large number of machine-type devices such as IoT (Internet of Things) are connected; and 2) massive machine type communication (mMTC) where a large number of machine-type devices such as IoT (Internet of Things) are connected. Furthermore, in Release 17, a future release of NR, reduced capability NR devices that do not require the high requirements of eMBB and URLLC but can reduce costs and extend battery life are being considered for use in sensor networks, surveillance cameras, and/or wearable devices (Non-Patent Document 2).

RP-161214, NTT DOCOMO, “Revision of SI: Study on New Radio Access Technology”, June 2016 RP-193238, Ericsson, “New SID on support of reduced capability NR devices”, December 2019

The object of the present invention is to provide a terminal device, a base station device, and a communication method that enable efficient communication in the wireless communication system described above.

(1) In order to achieve the above object, an aspect of the present invention takes the following measures. That is, a terminal device in one aspect of the present invention includes a receiver that receives a first PBCH included in a first block transmitted in a first time period and receives a second PBCH included in a second block transmitted from an OFDM symbol after a first time offset from the first OFDM symbol of the first block, and a processor that acquires first bit information of a first transport block, the first PBCH and the second PBCH carrying the first bit information, the first block being composed of four OFDM symbols including a PSS, an SSS, the first PBCH, and a first DMRS, and the second block being composed of three OFDM symbols including the second PBCH and a second DMRS.

(2) In addition, a base station device in one aspect of the present invention includes a transmitter that transmits a first PBCH included in a first block in a first time period and transmits a second PBCH included in a second block transmitted from an OFDM symbol after a first time offset from the first OFDM symbol of the first block, and a processor that generates first bit information of a first transport block, wherein the first PBCH and the second PBCH carry the first bit information, the first block is composed of four OFDM symbols including a PSS, an SSS, the first PBCH and a first DMRS, and the second block is composed of three OFDM symbols including the second PBCH and a second DMRS.

(3) Also, a communication method according to one aspect of the present invention is a communication method for a terminal device, which receives a first PBCH included in a first block transmitted in a first time period, receives a second PBCH included in a second block transmitted from an OFDM symbol after a first time offset from the first OFDM symbol of the first block, and obtains first bit information of a first transport block, the first PBCH and the second PBCH carry the first bit information, the first block is composed of four OFDM symbols including a PSS, an SSS, the first PBCH, and a first DMRS, and the second block is composed of three OFDM symbols including the second PBCH and a second DMRS.

(4) Also, a communication method according to one aspect of the present invention is a communication method of a base station device, which transmits a first PBCH included in a first block in a first time period, transmits a second PBCH included in a second block transmitted from an OFDM symbol after a first time offset from the first OFDM symbol of the first block, generates first bit information of a first transport block, the first PBCH and the second PBCH carry the first bit information, the first block is composed of four OFDM symbols including a PSS, an SSS, the first PBCH and a first DMRS, and the second block is composed of three OFDM symbols including the second PBCH and a second DMRS.

This invention allows terminal devices and base station devices to communicate efficiently.

1 is a diagram showing the concept of a wireless communication system according to an embodiment of the present invention. A figure showing an example of a schematic configuration of uplink and downlink slots according to an embodiment of the present invention. FIG. 2 is a diagram showing the relationship between subframes, slots, and minislots in the time domain according to an embodiment of the present invention. A figure showing an example of an SS/PBCH block and SS burst set according to an embodiment of the present invention. A figure showing an example of a first scrambling process of a PBCH and a third scrambling process of an additional PBCH according to an embodiment of the present invention. A figure showing examples of parameters used in the first scrambling process of the PBCH and the third scrambling process of the additional PBCH according to an embodiment of the present invention. A diagram showing resources in which PSS, SSS, PBCH and DMRS for PBCH are arranged within an SS/PBCH block according to an embodiment of the present invention. A figure showing an example of an additional PBCH block and a half frame in which one or more additional PBCH blocks are transmitted according to an embodiment of the present invention. A diagram showing another example of an additional PBCH block and a half frame in which one or more additional PBCH blocks are transmitted according to an embodiment of the present invention. A diagram showing resources in which an additional PBCH and a DMRS for the additional PBCH are arranged within an additional PBCH block according to an embodiment of the present invention. A figure showing an example of an additional PBCH block according to an embodiment of the present invention. A figure showing another example of an additional PBCH block according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of beamforming according to an embodiment of the present invention. 1 is a schematic block diagram showing a configuration of a terminal device 1 according to an embodiment of the present invention. 2 is a schematic block diagram showing a configuration of a base station device 3 according to an embodiment of the present invention. FIG.

The following describes an embodiment of the present invention.

Figure 1 is a conceptual diagram of a wireless communication system in this embodiment. In Figure 1, the wireless communication system includes a terminal device 1A, a terminal device 1B, and a base station device 3. Hereinafter, terminal device 1A and terminal device 1B are also referred to as terminal device 1.

The terminal device 1 is also referred to as a user terminal, a mobile station device, a communication terminal, a mobile device, a terminal, a UE (User Equipment), or an MS (Mobile Station). The base station device 3 is also referred to as a wireless base station device, a base station, a wireless base station, a fixed station, a Node B (NB), an evolved Node B (eNB), a Base Transceiver Station (BTS), a Base Station (BS), a NR Node B (NR Node B), an NNB, a Transmission and Reception Point (TRP), or a gNB. The base station device 3 may include a core network device. The base station device 3 may also include one or more transmission and reception points 4. At least some of the functions/processing of the base station device 3 described below may be functions/processing at each transmission and reception point 4 of the base station device 3. The base station device 3 may serve the terminal device 1 with a communication range (communication area) controlled by the base station device 3 as one or more cells. The base station device 3 may also serve the terminal device 1 as one or more cells, which are communication ranges (communication areas) controlled by one or more transmission/reception points 4. The base station device 3 may also divide one cell into multiple partial areas (beamed areas) and serve the terminal device 1 in each partial area. Here, the partial area may be identified based on the index of the beam used in beamforming or the index of precoding.

In this embodiment, the wireless communication link from the base station device 3 to the terminal device 1 is referred to as a downlink. In this embodiment, the wireless communication link from the terminal device 1 to the base station device 3 is referred to as an uplink.

In FIG. 1, the wireless communication between the terminal device 1 and the base station device 3 may use orthogonal frequency division multiplexing (OFDM) including a cyclic prefix (CP), single-carrier frequency division multiplexing (SC-FDM), discrete Fourier transform spread OFDM (DFT-S-OFDM), or multi-carrier code division multiplexing (MC-CDM).

In addition, in FIG. 1, the wireless communication between the terminal device 1 and the base station device 3 may use Universal Filtered Multi-Carrier (UFMC), Filtered OFDM (F-OFDM), OFDM multiplied by a window function (Windowed OFDM), or Filter-Bank Multi-Carrier (FBMC).

In this embodiment, OFDM is used as the transmission method and OFDM symbols are used, but the present invention also includes cases where the other transmission methods mentioned above are used.

In addition, in FIG. 1, the wireless communication between the terminal device 1 and the base station device 3 may use the above-mentioned transmission method in which a CP is not used or zero padding is used instead of a CP. Also, a CP or zero padding may be added to both the front and back.

One aspect of this embodiment may be operated in carrier aggregation or dual connectivity with radio access technologies (RATs) such as LTE, LTE-A, and LTE-A Pro. In this case, some or all of the cells or cell groups, carriers or carrier groups (e.g., primary cell (PCell), secondary cell (SCell), primary secondary cell (PSCell), MCG (Master Cell Group), SCG (Secondary Cell Group), etc.) may be used. Also, one aspect of this embodiment may be used in a standalone manner. In dual connectivity operation, the SpCell (Special Cell) is referred to as the PCell of the MCG or the PSCell of the SCG, depending on whether the MAC (Medium Access Control) entity is associated with the MCG or the SCG, respectively. If not in dual connectivity operation, the SpCell (Special Cell) is referred to as the PCell. SpCell (Special Cell) supports PUCCH transmission and contention-based random access.

In this embodiment, one or more serving cells may be configured for the terminal device 1. The configured multiple serving cells may include one primary cell and one or more secondary cells. The primary cell may be a serving cell where an initial connection establishment procedure has been performed, a serving cell where a connection re-establishment procedure has been started, or a cell designated as a primary cell in a handover procedure. One or more secondary cells may be configured at the time when an RRC (Radio Resource Control) connection is established or after. However, the configured multiple serving cells may include one primary secondary cell. The primary secondary cell may be a secondary cell capable of transmitting control information in the uplink among one or more secondary cells where the terminal device 1 is configured. In addition, two types of subsets of serving cells, a master cell group and a secondary cell group, may be configured for the terminal device 1. The master cell group may be composed of one primary cell and zero or more secondary cells. The secondary cell group may be composed of one primary secondary cell and zero or more secondary cells.

The wireless communication system of this embodiment may apply TDD (Time Division Duplex) and/or FDD (Frequency Division Duplex). The TDD (Time Division Duplex) method or the FDD (Frequency Division Duplex) method may be applied to all of the multiple cells. In addition, cells to which the TDD method is applied and cells to which the FDD method is applied may be aggregated. The TDD method may be referred to as unpaired spectrum operation. The FDD method may be referred to as paired spectrum operation.

Subframes will be described below. In this embodiment, the following will be referred to as subframes, but subframes according to this embodiment may also be referred to as resource units, radio frames, time periods, time intervals, etc.

FIG. 2 is a diagram showing an example of a schematic configuration of uplink and downlink slots according to the first embodiment of the present invention. Each radio frame is 10 ms long. Each radio frame is composed of 10 subframes and W slots. One slot is composed of X OFDM symbols. That is, one subframe has a length of 1 ms. Each slot has a time length defined by the subcarrier interval. For example, when the subcarrier interval of the OFDM symbol is 15 kHz and NCP (Normal Cyclic Prefix), X=7 or X=14, which are 0.5 ms and 1 ms, respectively. When the subcarrier interval is 60 kHz, X=7 or X=14, which are 0.125 ms and 0.25 ms, respectively. When X=14, for example, when the subcarrier interval is 15 kHz, W=10, and when the subcarrier interval is 60 kHz, W=40. FIG. 2 shows the case of X=7 as an example. The example of FIG. 2 can be similarly extended to the case where X=14. The uplink slots are also defined in the same way, and the downlink slots and the uplink slots may be defined separately. The bandwidth of the cell in FIG. 2 may be defined as a part of the band (BWP: BandWidth Part). The slots may be defined as Transmission Time Intervals (TTIs). The slots do not have to be defined as TTIs. The TTIs may be the transmission periods of transport blocks.

The signals or physical channels transmitted in each slot may be represented by a resource grid. The resource grid is defined by a number of subcarriers and a number of OFDM symbols for each numerology (subcarrier spacing and cyclic prefix length) and each carrier. The number of subcarriers constituting one slot depends on the downlink and uplink bandwidths of the cell, respectively. Each element in the resource grid is called a resource element. A resource element may be identified by the subcarrier number and the OFDM symbol number.

The resource grid is used to represent the mapping of resource elements of a certain physical downlink channel (e.g., PDSCH) or uplink channel (e.g., PUSCH). For example, when the subcarrier spacing is 15 kHz, the number of OFDM symbols included in a subframe X = 14, and in the case of NCP, one physical resource block is defined as 14 consecutive OFDM symbols in the time domain and 12*Nmax consecutive subcarriers in the frequency domain. Nmax is the maximum number of resource blocks (RBs) determined by the subcarrier spacing setting μ described later. In other words, the resource grid is composed of (14*12*Nmax, μ) resource elements. In the case of ECP (Extended CP), only a subcarrier spacing of 60 kHz is supported, so one physical resource block is defined by, for example, 12 (the number of OFDM symbols contained in one slot) * 4 (the number of slots contained in one subframe) = 48 consecutive OFDM symbols in the time domain and 12 * Nmax, μ consecutive subcarriers in the frequency domain. In other words, the resource grid is composed of (48 * 12 * Nmax, μ) resource elements.

As resource blocks (RB), reference resource blocks, common resource blocks, physical resource blocks, and virtual resource blocks are defined. One resource block is defined as 12 consecutive subcarriers in the frequency domain. The reference resource block is common to all subcarriers, and may be numbered in ascending order, for example, by constituting a resource block at a subcarrier interval of 15 kHz. Subcarrier index 0 in reference resource block index 0 may be referred to as reference point A (or may simply be referred to as a "reference point"). The common resource block is a resource block numbered in ascending order from 0 at each subcarrier interval setting μ from reference point A. The above-mentioned resource grid is defined by this common resource block. The physical resource block is a resource block numbered in ascending order from 0 included in a band part (BWP) described later, and the physical resource block is a resource block numbered in ascending order from 0 included in the band part (BWP). A certain physical uplink channel is first mapped to a virtual resource block. Then, the virtual resource block is mapped to a physical resource block. Hereinafter, the resource block may be a virtual resource block, a physical resource block, a common resource block, or a reference resource block.

Next, we will explain the subcarrier spacing setting μ. As mentioned above, NR supports one or more OFDM numerologies. For a certain BWP, the subcarrier spacing setting μ (μ = 0, 1, ..., 5) and the cyclic prefix length are given by the higher layer for the downlink BWP and by the higher layer for the uplink BWP. Here, when μ is given, the subcarrier spacing Δf is given by Δf = 2^μ・15 (kHz).

For subcarrier spacing setting μ, slots are numbered from 0 to N^{subframe,μ}_{slot}-1 in ascending order within a subframe and from 0 to N^{frame,μ}_{slot}-1 in ascending order within a frame. Based on the slot setting and cyclic prefix, there are N^{slot}_{symb} consecutive OFDM symbols in a slot. N^{slot}_{symb} is 14. The start of slot n^{μ}_{s} in a subframe is aligned in time with the start of the n^{μ}_{s}*N^{slot}_{symb}th OFDM symbol in the same subframe.

Next, subframes, slots, and minislots will be described. FIG. 3 shows an example of the relationship between subframes, slots, and minislots in the time domain. As shown in the figure, three types of time units are defined. A subframe is 1 ms regardless of the subcarrier interval, and the number of OFDM symbols included in a slot is 7 or 14 (however, if the cyclic prefix (CP) added to each symbol is Extended CP, it may be 6 or 12), and the slot length differs depending on the subcarrier interval. Here, when the subcarrier interval is 15 kHz, one subframe includes 14 OFDM symbols. The downlink slot may be referred to as PDSCH mapping type A. The uplink slot may be referred to as PUSCH mapping type A.

A minislot (which may also be called a subslot) is a time unit consisting of a number of OFDM symbols that is less than the number of OFDM symbols contained in one slot. The figure shows an example in which a minislot is composed of two OFDM symbols. The OFDM symbols in a minislot may coincide with the OFDM symbol timing that constitutes the slot. The minimum unit of scheduling may be a slot or a minislot. Allocating a minislot may also be called non-slot-based scheduling. Scheduling a minislot may also be expressed as scheduling a resource in which the relative time positions of the start positions of the reference signal and data are fixed. A downlink minislot may be called PDSCH mapping type B. An uplink minislot may be called PUSCH mapping type B.

In the terminal device 1, the transmission direction (uplink, downlink, or flexible) of the symbol in each slot is set in the higher layer using an RRC message including predetermined higher layer parameters received from the base station device 3, or is set by a PDCCH of a specific DCI format (e.g., DCI format 2_0) received from the base station device 3. In this embodiment, a slot format in which each symbol in a slot is set to either uplink, downlink, or flexible is called a slot format. One slot format may include a downlink symbol, an uplink symbol, and a flexible symbol.

In the downlink of this embodiment, the carrier corresponding to the serving cell is called a downlink component carrier (or downlink carrier). In the uplink of this embodiment, the carrier corresponding to the serving cell is called an uplink component carrier (or uplink carrier). In the sidelink of this embodiment, the carrier corresponding to the serving cell is called a sidelink component carrier (or sidelink carrier). The downlink component carrier, the uplink component carrier, and/or the sidelink component carrier are collectively called a component carrier (or carrier).

The physical channels and physical signals of this embodiment are described below.

In FIG. 1, the following physical channels are used in wireless communication between terminal device 1 and base station device 3.

・PBCH (Physical Broadcast CHannel)
・Additional PBCH
PDCCH (Physical Downlink Control CHannel)
PDSCH (Physical Downlink Shared CHannel)
PUCCH (Physical Uplink Control CHannel)
PUSCH (Physical Uplink Shared CHannel)
PRACH (Physical Random Access CHannel)

The PBCH is used to broadcast important information blocks (MIB: Master Information Block, EIB: Essential Information Block, BCH: Broadcast Channel) that contain important system information required by the terminal device 1.

The PBCH may also broadcast information specifying the number (SFN: System Frame Number) of the radio frame (also called the system frame) to which the PBCH is mapped and/or information specifying the half radio frame (HRF: Half Radio Frame) (also called the half frame).

The PBCH may also be used to broadcast a time index within a period of an SS/PBCH block (also referred to as a synchronization signal block, SS block, or SSB). Here, the time index is information indicating the index of the synchronization signal and PBCH within a cell. The time index may also be referred to as an SSB index or an SS/PBCH block index. For example, when transmitting an SS/PBCH block using the assumption of three transmission beams (transmission filter settings, quasi-co-location (QCL) for reception spatial parameters), the time order within a predetermined period or a set period may be indicated. Furthermore, the terminal device may recognize the difference in time index as a difference in transmission beam.

The additional PBCH may include an MIB, information identifying the SFN, information identifying the half frame, and/or an SS/PBCH block index.

The PDCCH is used to transmit (or carry) downlink control information (DCI) in downlink wireless communication (wireless communication from the base station device 3 to the terminal device 1). Here, one or more DCIs (which may be referred to as DCI formats) are defined for the transmission of the downlink control information. That is, a field for the downlink control information is defined as a DCI and mapped to information bits. The PDCCH is transmitted in a PDCCH candidate. The terminal device 1 monitors a set of PDCCH candidates in the serving cell. However, monitoring may mean attempting to decode the PDCCH according to a certain DCI format.

For example, the following DCI formats may be defined:
DCI format 0_0
DCI format 0_1
DCI format 0_2
DCI Format 1_0
DCI Format 1_1
DCI Format 1_2
DCI Format 2_0
DCI Format 2_1
DCI Format 2_2
DCI Format 2_3

DCI format 0_0 may be used for scheduling the PUSCH in a serving cell. DCI format 0_0 may include information indicating scheduling information (frequency domain resource allocation and time domain resource allocation) of the PUSCH. DCI format 0_0 may be added with a Cyclic Redundancy Check (CRC) scrambled by any of the Radio Network Temporary Identifiers (RNTIs), which are identifiers, Cell-RNTI (C-RNTI), Configured Scheduling (CS)-RNTI), MCS-C-RNTI, and/or Temporary C-NRTI (TC-RNTI). DCI format 0_0 may be monitored in a common search space or a UE-specific search space.

DCI format 0_1 may be used for scheduling the PUSCH in a serving cell. DCI format 0_1 may include information indicating PUSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating a band width part (BWP), a channel state information (CSI) request, a sounding reference signal (SRS) request, and/or information regarding an antenna port. DCI format 0_1 may be added with a CRC scrambled by any of the following RNTIs: C-RNTI, CS-RNTI, Semi Persistent (SP)-CSI-RNTI, and/or MCS-C-RNTI. DCI format 0_1 may be monitored in a UE-specific search space.

DCI format 0_2 may be used for scheduling the PUSCH in a serving cell. DCI format 0_2 may include information indicating scheduling information (frequency domain resource allocation and time domain resource allocation) of the PUSCH, information indicating the BWP, a CSI request, an SRS request, and/or information regarding an antenna port. DCI format 0_2 may be added with a CRC scrambled by any of the RNTIs, C-RNTI, CSI-RNTI, SP-CSI-RNTI, and/or MCS-C-RNTI. DCI format 0_2 may be monitored in a UE-specific search space. DCI format 0_2 may be referred to as DCI format 0_1A, etc.

DCI format 1_0 may be used for scheduling the PDSCH in a serving cell. DCI format 1_0 may include information indicating scheduling information (frequency domain resource allocation and time domain resource allocation) of the PDSCH. DCI format 1_0 may include a CRC scrambled by any of the following identifiers: C-RNTI, CS-RNTI, MCS-C-RNTI, Paging RNTI (P-RNTI), System Information (SI)-RNTI, Random Access (RA)-RNTI, and/or TC-RNTI. DCI format 1_0 may be monitored in a common search space or a UE-specific search space.

DCI format 1_1 may be used for scheduling the PDSCH in a serving cell. DCI format 1_1 may include information indicating PDSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating a band portion (BWP), a transmission configuration indication (TCI), and/or information regarding an antenna port. DCI format 1_1 may be added with a CRC scrambled by any of the C-RNTI, CS-RNTI, and/or MCS-C-RNTI among the RNTIs. DCI format 1_1 may be monitored in a UE-specific search space.

DCI format 1_2 may be used for scheduling the PDSCH in a serving cell. DCI format 1_2 may include information indicating PDSCH scheduling information (frequency domain resource allocation and time domain resource allocation), information indicating the BWP, TCI, and/or information regarding the antenna port. DCI format 1_2 may be added with a CRC scrambled by any of the C-RNTI, CS-RNTI, and/or MCS-C-RNTI among the RNTIs. DCI format 1_2 may be monitored in a UE-specific search space. DCI format 1_2 may be referred to as DCI format 1_1A, etc.

DCI format 2_0 is used to notify the slot format of one or more slots. The slot format is defined as each OFDM symbol in a slot being classified as downlink, flexible, or uplink. For example, when the slot format is 28, DDDDDDDDDDDDDDDDFU is applied to the 14 OFDM symbols in a slot in which slot format 28 is specified. Here, D is the downlink symbol, F is the flexible symbol, and U is the uplink symbol. Slots will be described later.

DCI format 2_1 is used to notify the terminal device 1 of the physical resource blocks (PRBs or RBs) and OFDM symbols for which no transmission may be assumed. This information may be referred to as a preemption instruction (intermittent transmission instruction).

DCI format 2_2 is used to transmit PUSCH and transmit power control (TPC) commands for PUSCH.

DCI format 2_3 is used to transmit a group of TPC commands for sounding reference signal (SRS) transmission by one or more terminal devices 1. An SRS request may also be transmitted together with the TPC command. In addition, an SRS request and a TPC command may be defined in DCI format 2_3 for an uplink without a PUSCH and a PUCCH, or for an uplink in which the transmission power control of the SRS is not linked to the transmission power control of the PUSCH.

The DCI for the downlink is also referred to as a downlink grant or a downlink assignment. Here, the DCI for the uplink is also referred to as an uplink grant or an uplink assignment. The DCI may also be referred to as a DCI format.

The CRC parity bits added to the DCI format transmitted on one PDCCH are scrambled with the SI-RNTI, P-RNTI, C-RNTI, CS-RNTI, RA-RNTI, or TC-RNTI. The SI-RNTI may be an identifier used for broadcasting system information. The P-RNTI may be an identifier used for paging and notification of system information changes. The C-RNTI, MCS-C-RNTI, and CS-RNTI are identifiers for identifying terminal devices within a cell. The TC-RNTI is an identifier for identifying the terminal device 1 that transmitted the random access preamble during a contention based random access procedure.

The C-RNTI is used to control the PDSCH or PUSCH in one or more slots. The CS-RNTI is used for periodic allocation of PDSCH or PUSCH resources. The MCS-C-RNTI is used to indicate the use of a given MCS table for grant-based transmission. The TC-RNTI is used to control the PDSCH or PUSCH transmission in one or more slots. The TC-RNTI is used to schedule retransmissions of the random access message 3 and the transmission of the random access message 4. The RA-RNTI is determined according to the frequency and time location information of the physical random access channel that transmitted the random access preamble.

Different values may be used for the C-RNTI and/or other RNTIs depending on the type of traffic on the PDSCH or PUSCH. Different values may be used for the C-RNTI and other RNTIs depending on the service type (eMBB, URLLC, and/or mMTC) of the data transmitted on the PDSCH or PUSCH. The base station device 3 may use different RNTI values depending on the service type of the data to be transmitted. The terminal device 1 may identify the service type of the data transmitted on the associated PDSCH or PUSCH depending on the value of the RNTI applied (used for scrambling) to the received DCI.

The PUCCH is used to transmit uplink control information (UCI) in uplink wireless communication (wireless communication from the terminal device 1 to the base station device 3). Here, the uplink control information may include channel state information (CSI) used to indicate the state of the downlink channel. The uplink control information may also include a scheduling request (SR) used to request UL-SCH resources. The uplink control information may also include a hybrid automatic repeat request ACKnowledgement (HARQ-ACK). The HARQ-ACK is used to transmit downlink data (Transport block, Medium Access
It may also indicate a HARQ-ACK for a Control Protocol Data Unit (MAC PDU, Downlink-Shared Channel (DL-SCH)).

The PDSCH is used to transmit downlink data (DL-SCH: Downlink Shared CHannel) from the Medium Access Control (MAC) layer. In addition, in the case of downlink, the PDSCH is also used to transmit system information (SI: System Information) and random access response (RAR: Random Access Response).

The PUSCH may be used to transmit uplink data (UL-SCH: Uplink Shared CHannel) from the MAC layer or HARQ-ACK and/or CSI together with uplink data. The PUSCH may also be used to transmit only CSI or only HARQ-ACK and CSI. That is, the PUSCH may be used to transmit only UCI.

Here, the base station device 3 and the terminal device 1 exchange (transmit and receive) signals in a higher layer. For example, the base station device 3 and the terminal device 1 may transmit and receive an RRC message (also referred to as an RRC message, RRC information, or RRC signalling) in the Radio Resource Control (RRC) layer. The base station device 3 and the terminal device 1 may also transmit and receive a MAC control element in the MAC (Medium Access Control) layer. The RRC layer of the terminal device 1 acquires system information broadcast from the base station device 3. Here, the RRC message, the system information, and/or the MAC control element are also referred to as a higher layer signal (higher layer signaling) or a higher layer parameter (higher layer parameter). Each of the parameters included in the higher layer signal received by the terminal device 1 may be referred to as a higher layer parameter. The upper layer here means an upper layer seen from the physical layer, and may include one or more of a MAC layer, an RRC layer, an RLC layer, a PDCP layer, a NAS (Non Access Stratum) layer, etc. For example, in the processing of the MAC layer, the upper layer may include one or more of an RRC layer, an RLC layer, a PDCP layer, a NAS layer, etc. Hereinafter, the meaning of "A is given (provided) by the upper layer" or "A is given (provided) by the upper layer" may mean that the upper layer (mainly the RRC layer or the MAC layer, etc.) of the terminal device 1 receives A from the base station device 3, and the received A is given (provided) to the physical layer of the terminal device 1 from the upper layer of the terminal device 1. For example, in the terminal device 1, "upper layer parameters are provided" may mean that an upper layer signal is received from the base station device 3, and the upper layer parameters included in the received upper layer signal are provided to the physical layer of the terminal device 1 from the upper layer of the terminal device 1. Setting the upper layer parameters to the terminal device 1 may mean that the upper layer parameters are given (provided) to the terminal device 1. For example, setting upper layer parameters in the terminal device 1 may mean that the terminal device 1 receives an upper layer signal from the base station device 3 and sets the received upper layer parameters in the upper layer. However, setting upper layer parameters in the terminal device 1 may also include setting default parameters that are given in advance in the upper layer of the terminal device 1.

The PDSCH or PUSCH may be used to transmit RRC signaling and MAC control elements. The RRC signaling transmitted from the base station device 3 by the PDSCH may be common signaling for multiple terminal devices 1 in the cell. Furthermore, the RRC signaling transmitted from the base station device 3 may be dedicated signaling (also called dedicated signaling) for a certain terminal device 1. That is, terminal device-specific (UE-specific) information may be transmitted using dedicated signaling for a certain terminal device 1. Furthermore, the PUSCH may be used to transmit UE capabilities in the uplink.

In Fig. 1, the following downlink physical signals are used in downlink wireless communication, where the downlink physical signals are not used to transmit information output from higher layers, but are used by the physical layer.
・Synchronization signal (SS)
・Reference Signal (RS)

The synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The PSS and SSS may be used to detect the cell ID.

The synchronization signal is used when the terminal device 1 synchronizes the frequency domain and time domain of the downlink. Here, the synchronization signal may be used by the terminal device 1 for precoding or beam selection in precoding or beamforming by the base station device 3. Note that the beam may be referred to as a transmit or receive filter setting, or a spatial domain transmit filter or a spatial domain receive filter.

The reference signal is used when the terminal device 1 performs propagation path compensation of the physical channel. Here, the reference signal may also be used by the terminal device 1 to calculate the downlink CSI. In addition, the reference signal may be used for fine synchronization to the extent that numerology such as radio parameters and subcarrier spacing and FFT window synchronization can be achieved.

In this embodiment, one or more of the following downlink reference signals are used.
・DMRS (Demodulation Reference Signal)
・CSI-RS (Channel State Information Reference Signal)
・PTRS (Phase Tracking Reference Signal)
・TRS (Tracking Reference Signal)

DMRS is used to demodulate modulated signals. Two types of DMRS may be defined: a reference signal for demodulating PBCH and a reference signal for demodulating PDSCH, and both may be referred to as DMRS. CSI-RS is used for measuring channel state information (CSI) and beam management, and applies a periodic, semi-persistent, or aperiodic CSI reference signal transmission method. For CSI-RS, non-zero power (NZP) CSI-RS and zero power (ZP) CSI-RS with zero transmission power (or reception power) may be defined. Here, ZP CSI-RS may be defined as a CSI-RS resource with zero transmission power or no transmission. PTRS is used to track the phase on the time axis in order to compensate for the frequency offset caused by phase noise. TRS is used to compensate for the Doppler shift during high-speed movement. Note that TRS may be used as one setting of CSI-RS. For example, a radio resource may be set as a one-port CSI-RS as a TRS.

In this embodiment, any one or more of the following uplink reference signals are used.
・DMRS (Demodulation Reference Signal)
・PTRS (Phase Tracking Reference Signal)
・SRS (Sounding Reference Signal)

DMRS is used to demodulate modulated signals. Two types of DMRS may be defined: a reference signal for demodulating PUCCH and a reference signal for demodulating PUSCH, and both may be called DMRS. SRS is used for measuring uplink channel state information (CSI), channel sounding, and beam management. PTRS is used to track the phase on the time axis in order to compensate for frequency offsets caused by phase noise.

In this embodiment, the downlink physical channel and/or the downlink physical signal are collectively referred to as a downlink signal. In this embodiment, the uplink physical channel and/or the uplink physical signal are collectively referred to as an uplink signal. In this embodiment, the downlink physical channel and/or the uplink physical channel are collectively referred to as a physical channel. In this embodiment, the downlink physical signal and/or the uplink physical signal are collectively referred to as a physical signal.

BCH, UL-SCH and DL-SCH are transport channels. A channel used in the Medium Access Control (MAC) layer is called a transport channel. The unit of the transport channel used in the MAC layer is also called a transport block (TB) and/or a MAC Protocol Data Unit (PDU). In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) control is performed for each transport block. A transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, the transport block is mapped to a codeword, and encoding processing is performed for each codeword.

Figure 4 is a diagram showing an example of an SS/PBCH block (also referred to as a synchronization signal block, SS block, or SSB) according to this embodiment and a half frame (which may be referred to as a Half frame with SS/PBCH block or SS burst set) in which one or more SS/PBCH blocks are transmitted. Figure 4 shows an example in which two SS/PBCH blocks are included in an SS burst set that exists at a constant period (which may be referred to as an SSB period), and the SS/PBCH block is composed of four consecutive OFDM symbols.

The terminal device 1 uses the format of the SS/PBCH block to consider that the reception opportunities of the PSS, SSS, and PBCH exist in consecutive symbols. In a half frame in which the SS/PBCH block exists, the first symbol index I _SSB of the symbol to which the SS/PBCH block can be mapped may be determined as follows. When the subcarrier interval is 15 kHz, I _SSB may be a symbol index that satisfies {2, 8} + 14 * n. However, n is n = 0, 1 when the carrier frequency is 3 GHz or less, and n = 0, 1, 2, 3 when the carrier frequency is 3 GHz or more. When the subcarrier interval is 30 kHz, I _SSB may be a symbol index that satisfies {4, 8, 16, 20} + 28 * n. However, n is n = 0 when the carrier frequency is 3 GHz or less, and n = 0, 1 when the carrier frequency is 3 GHz or more.

The SS/PBCH block is a block that includes a synchronization signal (PSS, SSS), a PBCH, and a DMRS for the PBCH. Transmitting a signal/channel included in an SS/PBCH block is expressed as transmitting an SS/PBCH block. When transmitting a synchronization signal and/or a PBCH using one or more SS/PBCH blocks in an SS burst set, the base station device 3 may use an independent downlink transmission beam for each SS/PBCH block.

This section explains how to generate the payload transmitted on the PBCH in this embodiment.

PBCH is mainly used to transmit information of a transport block including MIB. MIB is master information including 6 MSB (Most Significant Bit) of 10 bits indicating the SFN to which the SS/PBCH block is transmitted, SIB1, subcarrier spacing used for downlink signals of the initial access procedure, etc. However, the transport block including MIB may be updated at a predetermined period P _MIB . However, there is one transport block including MIB within the period P _MIB , and the transport block may be used repeatedly within the period P _{MIB. For example, the period P MIB is} 80 ms, and the same transport block may be repeatedly transmitted within 80 ms. The base station device 3 generates a transport block of A ₁ bit in the upper layer, and further adds additional bit information of 8 bits. However, the transport block of A ₁ bit may include MIB.

The first to fourth bits of the additional bit information transmitted on the PBCH indicate the four least significant bits (LSBs) of the 10 bits indicating the SFN in which the SS/PBCH block is transmitted. The fifth bit of the additional bit information transmitted on the PBCH is a half-frame bit indicating whether the half-frame in which the SS/PBCH block is transmitted is the first or second half of the radio frame. The sixth to eighth bits of the additional bit information transmitted on the PBCH indicate part of the SSB index information if the maximum number of SS/PBCH blocks that can be placed in a half-frame is 64, and are otherwise one bit indicating part of the subcarrier offset information for identifying the frequency position of the SS/PBCH block and a reserved bit.

The base station device 3 performs an interleaver process on the MIB and additional bit information of A bits (A=A ₁ +8), and then performs a first scrambling process. However, the first scrambling process outputs a bit sequence of a' ₀ to a' _A for an input bit sequence of a ₀ to a _A -1, and a' _i = (a _i + s _i ) mod 2. Here, s _i is generated as shown in FIG. 5 based on the SFN at which the SS/PBCH block is transmitted. In FIG. 5, c(i) is a predetermined pseudo-random sequence. In FIG. 5, M is M=A-3 when the number of SS/PBCH blocks that can be arranged in a half frame is 4 or 8, and M=A-6 when the number of SS/PBCH blocks that can be arranged in a half frame is 64. In Fig. 5, v is determined using the 3rd LSB and 2nd LSB of the SFN in which the SS/PBCH block is transmitted, as shown in Fig. 6. According to the process in Fig. 6, the first scrambling process is a scrambling process based on a part of the bit sequence of the SFN of the radio frame in which the SS/PBCH block is transmitted.

The base station device 3 performs a CRC adding process to add L parity bits to the A-bit bit sequence _a'0 to _a'A generated by the first scrambling process, and then performs a first channel coding process using polar coding on B=A+L bits to generate N coded bits.

The base station device 3 performs a first rate matching process on the N coded bits, and outputs an 864-bit sequence b(0) to b(863).

The base station device 3 performs a second scrambling process on the output bit sequence b(0) to b(863) of the first rate matching process before the modulation process. The output bit sequence of the second scrambling process is expressed as b'(i) = b(i) + _c2 (i + _v2 * 864)) mod 2, where _c2 is a predetermined pseudo-random sequence, and _v2 is a value indicated by the 2LSB of the SSB index when the maximum number of SS/PBCH blocks that can be arranged in a half frame is 4, and is a value indicated by the 3LSB of the SSB index in other cases.

The base station device 3 performs modulation processing using QPSK on the output bit sequence b'(0) to b'(863) of the second scrambling processing, generating 432 PBCH modulated symbols dPBCH(0) to dPBCH(431). The base station device 3 maps the generated 432 PBCH modulated symbols to the PBCH resources in the SS/PBCH block, and transmits them as the SS/PBCH block.

In FIG. 4, the PSS, SSS, PBCH, and DMRS for the PBCH are time/frequency multiplexed in one SS/PBCH block. FIG. 7 is a table showing resources in which the PSS, SSS, PBCH, and DMRS for the PBCH are placed within the SS/PBCH block.

The PSS may be mapped to the first symbol in the SS/PBCH block (the OFDM symbol with OFDM symbol number 0 relative to the start symbol of the SS/PBCH block). The PSS sequence is composed of 127 symbols and may be mapped to the 57th to 183rd subcarriers in the SS/PBCH block (subcarriers with subcarrier numbers 56 to 182 relative to the start subcarrier of the SS/PBCH block).

The SSS may be mapped to the third symbol in the SS/PBCH block (the OFDM symbol with OFDM symbol number 2 relative to the start symbol of the SS/PBCH block). The SSS sequence is composed of 127 symbols and may be mapped to the 57th to 183rd subcarriers in the SS/PBCH block (subcarriers with subcarrier numbers 56 to 182 relative to the start subcarrier of the SS/PBCH block).

The PBCH and DMRS may be mapped to the second, third, and fourth symbols (OFDM symbols with OFDM symbol numbers 1, 2, and 3 relative to the start symbol of the SS/PBCH block) in the SS/PBCH block. The PBCH modulation symbol sequence is composed of M _symb symbols, and may be mapped to resources to which the DMRS is not mapped, among the first to 240th subcarriers (subcarriers with subcarrier numbers 0 to 239 relative to the start subcarrier of the SS/PBCH block) of the second and fourth symbols in the SS/PBCH block, and the first to 48th subcarriers and the 184th to 240th subcarriers (subcarriers with subcarrier numbers 0 to 47 and 192 to 239 relative to the start subcarrier of the SS/PBCH block) of the third symbol in the SS/PBCH block.
The DMRS symbol sequence is composed of 144 symbols, and may be mapped to the 1st to 240th subcarriers of the second and fourth symbols in the SS/PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the start subcarrier of the SS/PBCH block), and the 1st to 48th subcarriers and the 184th to 240th subcarriers of the third symbol in the SS/PBCH block (subcarriers with subcarrier numbers 0 to 47 and 192 to 239 relative to the start subcarrier of the SS/PBCH block), one subcarrier for every four subcarriers. For example, for 240 subcarriers, 180 subcarriers may be mapped with PBCH modulation symbols, and 60 subcarriers may be mapped with DMRS for the PBCH.

One or more SS/PBCH blocks in the SS burst set may be assigned different SSB indices. The SS/PBCH blocks assigned a certain SSB index may be periodically transmitted by the base station device 3 based on the SSB period. For example, an SSB period for the SS/PBCH block to be used for initial access and an SSB period to be set for a connected (Connected or RRC_Connected) terminal device 1 may be defined. The SSB period to be set for a connected (Connected or RRC_Connected) terminal device 1 may be set by an RRC parameter. The SSB period to be set for a connected (Connected or RRC_Connected) terminal device 1 is a period of radio resources in the time domain that may potentially be transmitted, and the base station device 3 may actually decide whether to transmit. The SSB period for the SS/PBCH block to be used for initial access may be predefined in a specification or the like. For example, the terminal device 1 performing initial access may consider the SSB period to be 20 milliseconds.

The time position of the SS burst set to which the SS/PBCH block is mapped is determined by the PBC
The current system frame number and the half frame may be identified based on information for identifying a system frame number (SFN) included in the SS/PBCH block and/or information for identifying a half frame. The terminal device 1 that has received the SS/PBCH block may identify the current system frame number and the half frame based on the received SS/PBCH block.

SS/PBCH blocks are assigned SSB indices (which may also be referred to as SS/PBCH block indices) according to their temporal positions within the SS burst set. The terminal device 1 identifies the SSB index based on PBCH information and/or reference signal information contained in the detected SS/PBCH block.

SS/PBCH blocks with the same relative time within each SS burst set in the multiple SS burst sets may be assigned the same SSB index. SS/PBCH blocks with the same relative time within each SS burst set in the multiple SS burst sets may be assumed to be QCL (or to have the same downlink transmit beam). In addition, antenna ports with SS/PBCH blocks with the same relative time within each SS burst set in the multiple SS burst sets may be assumed to be QCL with respect to mean delay, Doppler shift, and spatial correlation.

Within a period of a certain SS burst set, SS/PBCH blocks assigned the same SSB index may be assumed to be QCL with respect to average delay, average gain, Doppler spread, Doppler shift, and spatial correlation. A configuration corresponding to one or more SS/PBCH blocks (or reference signals) that are QCL may be referred to as a QCL configuration.

The number of SS/PBCH blocks (which may also be referred to as the number of SS blocks or SSBs) may be defined, for example, as the number of SS/PBCH blocks in an SS burst, or an SS burst set, or a period of SS/PBCH blocks. The number of SS/PBCH blocks may also indicate the number of beam groups for cell selection in an SS burst, or an SS burst set, or a period of SS/PBCH blocks. Here, a beam group may be defined as the number of different SS/PBCH blocks or different beams included in an SS burst, or an SS burst set, or a period of SS/PBCH blocks.

The base station device 3 according to this embodiment transmits an additional PBCH block using resources (time resources or frequency resources) different from the SS/PBCH block. The additional PBCH block is a block including the additional PBCH and a DMRS for the additional PBCH. The transmission of a signal/channel included in the additional PBCH block is expressed as the transmission of the additional PBCH block. However, the additional PBCH block may be transmitted from the base station device 3 only in a frequency band supporting a specific terminal device 1. However, the additional PBCH block may be transmitted from the base station device 3 only in a TDD system and/or an FDD system supporting a specific terminal device 1. However, the additional PBCH block may be transmitted from the base station device 3 only in a cell supporting a specific terminal device 1. However, the MIB transmitted on the PBCH in the SS/PBCH block may be additionally transmitted on the additional PBCH from the base station device 3 only in a frequency band supporting a specific terminal device 1. However, the MIB transmitted on the PBCH in the SS/PBCH block may be additionally transmitted from the base station device 3 on the additional PBCH only in the TDD system and/or FDD system supporting a specific terminal device 1. However, the MIB transmitted on the PBCH in the SS/PBCH block may be additionally transmitted from the base station device 3 on the additional PBCH only in the cell supporting the specific terminal device 1. However, the specific terminal device 1 may be a terminal device 1 having a specific terminal capability (UE capability). When transmitting the additional PBCH using one or more additional PBCH blocks in the additional PBCH burst set, the base station device 3 may use an independent downlink transmission beam for each additional PBCH block. However, the additional PBCH block according to this embodiment may be the additional PBCH and/or the DMRS for the additional PBCH itself. For example, transmitting/receiving/processing the additional PBCH block may be transmitting/receiving/processing the additional PBCH and/or DMRS for the additional PBCH. However, the additional PBCH and/or DMRS for the additional PBCH according to this embodiment may be a DMRS for the PBCH and/or additional PBCH transmitted in a location other than the SS/PBCH block. For example, the additional PBCH and/or DMRS for the additional PBCH may be a DMRS for the PBCH and/or additional PBCH transmitted in a time and/or frequency resource different from the SS/PBCH block periodically transmitted in the SSB period. However, the additional PBCH block according to this embodiment may be an SS/PBCH block without a PSS and/or SSS.

In this embodiment, the additional PBCH block and/or the additional PBCH is associated with one SS/PBCH block transmitted within an SS burst set (Halfframe with SS/PBCH block). The transport block transmitted on the additional PBCH and the transport block transmitted on the PBCH in the corresponding SS/PBCH block may be the same. The PBCH in the SS/PBCH block and the transport block transmitted on the additional PBCH include the same MIB.

This section describes how to generate the payload transmitted on the additional PBCH in this embodiment.

The additional PBCH is used to transmit information of a transport block including an MIB, and may include the same information as the transport block of the PBCH included in the corresponding SS/PBCH block. The base station device 3 may generate a _1- bit transport block in a higher layer and further add 8-bit additional bit information. However, the transport block and/or additional bit information transmitted in the additional PBCH may be the transport block and additional bit information transmitted in the PBCH of the corresponding SS/PBCH block.

The first to fourth bits of the additional bit information transmitted on the additional PBCH may indicate the four least significant bits (LSBs) of the 10 bits indicating the SFN in which the corresponding SS/PBCH block is transmitted. The fifth bit of the additional bit information transmitted on the additional PBCH may be a half-frame bit indicating whether the half-frame in which the corresponding SS/PBCH block is transmitted is the first or second half of the radio frame. The sixth to eighth bits of the additional bit information transmitted on the additional PBCH may indicate part of the SSB index information if the maximum number of SS/PBCH blocks that can be placed in a half-frame is 64, or may be one bit and a reserved bit indicating part of the subcarrier offset information for identifying the frequency position of the SS/PBCH block in other cases.

The base station device 3 may perform the same interleaver processing as that for the PBCH on the MIB and additional bit information of A bits (A=A ₁ +8), and then perform a third scrambling processing. However, the third scrambling processing outputs a bit sequence of a' ₀ to a' _A for an input bit sequence of a ₀ to a _A -1, and a' _i = (a _i + s' _i ) mod 2. However, s' _i may be generated as shown in FIG. 5 based on the SFN at which the SS/PBCH block corresponding to the additional PBCH is transmitted. That is, the third scrambling process is similar to the first scrambling process, but _s′i used in the third scrambling process may be based on a part of the bit sequence of the SFN of the radio frame in which the additional PBCH block is transmitted, rather than on a part of the bit sequence of the SFN of the radio frame in which the additional PBCH block and the corresponding SS/PBCH block are transmitted. In other words, the third scrambling process may be a scrambling process based on a part of the bit sequence of the SFN of the radio frame in which the additional PBCH block and the corresponding SS/PBCH block are transmitted.

The base station device 3 performs a CRC adding process to add L parity bits to the bit sequence _a'0 to _a'A of A bits generated by the third scrambling process, and then performs a second channel coding process using polar coding on B=A+L bits to generate N coded bits. However, the second channel coding process may be the same as the first channel coding process used to generate the payload of the PBCH. However, the B bits input to the second channel coding process may be the B bits input by the channel coding process of the PBCH included in the SS/PBCH block corresponding to the additional PBCH.

The N coded bits are output as a series of E bits b(0) to b(E-1) by the second rate matching process. Here, E is based on the number of additional PBCH modulation symbols arranged in the additional PBCH block. For example, if 540 additional PBCH modulation symbols are arranged in the additional PBCH block with 180 subcarriers x 3 OFDM symbols and the modulation method is QPSK, E is 1080. However, the N coded bits input to the second rate matching process may be the N coded bits transmitted on the PBCH included in the SS/PBCH block corresponding to the additional PBCH.

The base station device 3 performs a fourth scrambling process on the output bit sequence b(0) to b(E-1) of the second rate matching process before the modulation process. The output bit sequence of the second scrambling process is expressed as b'(i) = b(i) + _c2 (i + _v2 * E)) mod 2, where _c2 is a predetermined pseudo-random sequence, and _v2 is a value indicated by the 2LSB of the SSB index when the maximum number of SS/PBCH blocks that can be arranged in a half frame is 4, and is a value indicated by the 3LSB of the SSB index in other cases.

The base station device 3 performs modulation processing using QPSK on the output bit sequence b'(0) to b'(E-1) of the fourth scrambling process, generating PBCH modulation symbols dPBCH(0) to dPBCH(E/2-1) of E/2 symbols. The base station device 3 maps the generated PBCH modulation symbols of E/2 symbols to the resources of the additional PBCH block, and transmits them as the additional PBCH block.

In this embodiment, the additional PBCH block is transmitted in the OFDM symbol associated with the corresponding SS/PBCH block.

As an example, the additional PBCH block according to this embodiment is transmitted from an OFDM symbol after a predetermined time offset from the start symbol of the corresponding SS/PBCH block. The predetermined time offset may be determined based on the SSB period. The predetermined time offset may be a predetermined number of OFDM symbols.

As another example, the additional PBCH block according to this embodiment may be transmitted in a candidate resource for another SS/PBCH block in a half frame including the corresponding SS/PBCH block. For example, if there are four candidate resources for the SS/PBCH block in a half frame including the SS/PBCH block, the SS/PBCH block may be transmitted in two candidate resources, and the additional PBCH block may be transmitted in the remaining two candidate resources.

As another example, the additional PBCH block according to this embodiment may be transmitted in a symbol/slot not used for the SS/PBCH block within a half frame including the corresponding SS/PBCH block. For example, if a half frame including an SS/PBCH block includes five slots and the first two slots are capable of transmitting the SS/PBCH block, the other three slots may be used to transmit the additional PBCH block.

The time position relationship between the additional PBCH block and the corresponding SS/PBCH block in this embodiment may be determined by the time position relationship between the half frame including the additional PBCH block and the half frame including the corresponding SS/PBCH block. For example, the half frame including the additional PBCH block may be a half frame after a predetermined time offset from the half frame including the corresponding SS/PBCH block. For example, the time position of the additional PBCH block in the half frame including the additional PBCH block may be the same as the time position of the SS/PBCH block in the half frame including the corresponding SS/PBCH block.

The starting subcarrier of the additional PBCH block in this embodiment may be a subcarrier with a predetermined frequency offset added to the starting subcarrier of the corresponding SS/PBCH block. However, if the value with the frequency offset added exceeds a certain value, the value obtained by subtracting the certain value may be used as the starting subcarrier of the additional PBCH block. For example, if the value obtained by adding a predetermined frequency offset to the starting subcarrier of the corresponding SS/PBCH block exceeds the band in which the additional PBCH block can be allocated, the value obtained by subtracting the bandwidth of the band in which the additional PBCH block can be allocated from the value may be used as the starting subcarrier of the additional PBCH block.

FIG. 8 is a diagram showing an example of an additional PBCH block according to the present embodiment and a half frame (which may be referred to as an additional PBCH burst set) in which one or more additional PBCH blocks are transmitted. FIG. 8 shows an example in which a half frame including an additional PBCH block exists between half frames including SS/PBCH blocks that exist at a constant period (SSB period), and the additional PBCH block is composed of four consecutive OFDM symbols. The additional PBCH block is transmitted in a resource corresponding to one SS/PBCH block, and in the additional PBCH block, the additional PBCH and the DMRS for the additional PBCH exist in a resource corresponding to the PBCH in the SS/PBCH block. For example, the additional PBCH and the DMRS for the additional PBCH are located in the second, third, and fourth symbols (relative to the start symbol of the additional PBCH block) in the additional PBCH block.
to) OFDM symbols with OFDM symbol numbers 1, 2, and 3. The sequence of modulation symbols for the additional PBCH is composed of Msymb symbols, and may be mapped to resources to which the DMRS for the additional PBCH is not mapped, among the 1st subcarrier to the 240th subcarrier of the second and fourth symbols in the additional PBCH block (subcarriers with subcarrier numbers 0 to 239 with respect to the start subcarrier of the additional PBCH block), and the 1st subcarrier to the 48th subcarrier and the 184th to 240th subcarriers (subcarriers with subcarrier numbers 0 to 47 and 192 to 239 with respect to the start subcarrier of the additional PBCH block) of the third symbol in the additional PBCH block. The sequence of DMRS symbols for the additional PBCH is composed of 144 symbols, and may be mapped to the 1st to 240th subcarriers of the second and fourth symbols in the additional PBCH block (subcarriers with subcarrier numbers from 0 to 239 with respect to the starting subcarrier of the additional PBCH block), and the 1st to 48th subcarriers and the 184th to 240th subcarriers of the third symbol in the additional PBCH block (subcarriers with subcarrier numbers from 0 to 47 and 192 to 239 with respect to the starting subcarrier of the additional PBCH block), one subcarrier for every four subcarriers.

9 is a diagram showing another example of an additional PBCH block according to the present embodiment and a half frame in which one or more additional PBCH blocks are transmitted. FIG. 9 shows an example in which a half frame including an additional PBCH block exists between half frames including SS/PBCH blocks that exist at a constant period (SSB period), and the additional PBCH block is composed of three consecutive OFDM symbols. The additional PBCH block is transmitted in a resource corresponding to one SS/PBCH block, and the additional PBCH or a DMRS for the additional PBCH exists in all resources in the additional PBCH block. FIG. 10 is a table showing an example of resources in which the additional PBCH and the DMRS for the additional PBCH are arranged in the additional PBCH block. For example, the sequence of modulation symbols for the additional PBCH is composed of M _symb2 symbols, and may be mapped to resources in which the DMRS for the additional PBCH is not mapped among the 1st to 240th subcarriers (subcarriers with subcarrier numbers 0 to 239 with respect to the start subcarrier of the additional PBCH block) of each of the three symbols in the additional PBCH block. The sequence of symbols for the DMRS for the additional PBCH is composed of 180 symbols, and may be mapped to one subcarrier for every four subcarriers for the 1st to 240th subcarriers (subcarriers with subcarrier numbers 0 to 239 with respect to the start subcarrier of the additional PBCH block). However, the number of symbols constituting the additional PBCH block does not have to be three symbols. For example, the additional PBCH block is composed of four symbols, and the additional PBCH or the DMRS for the additional PBCH may exist for the 240 subcarriers of each symbol. However, the number of subcarriers constituting the additional PBCH block does not have to be 240. For example, the additional PBCH block may be composed of 180 subcarriers and 4 OFDM symbols, and the additional PBCH or the DMRS for the additional PBCH may exist for the 180 subcarriers of each symbol.

FIG. 11 is a diagram showing an example of an additional PBCH block according to this embodiment. FIG. 11 shows an example in which an additional PBCH block exists in a half frame including an SS/PBCH block that exists at a constant period (SSB period), and the additional PBCH block is composed of four consecutive OFDM symbols. The additional PBCH block is transmitted in a resource corresponding to one SS/PBCH block, and the additional PBCH or a DMRS for the additional PBCH exists in all resources in the additional PBCH block. For example, the sequence of modulation symbols of the additional PBCH is composed of M _symb2 symbols, and the DMRS for the additional PBCH may be mapped to a resource that is not mapped among the 1st subcarrier to the 240th subcarrier (subcarrier with a subcarrier number of 0 to 239 with respect to the start subcarrier of the additional PBCH block) of each of the four symbols in the additional PBCH block. The symbol sequence of the DMRS for the additional PBCH is composed of 240 symbols, and may be mapped to the first to 240th subcarriers of the four symbols in the additional PBCH block (subcarriers with subcarrier numbers 0 to 239 relative to the start subcarrier of the additional PBCH block), one subcarrier at a time for every four subcarriers. However, the additional PBCH or the DMRS for the additional PBCH may not exist for all resources in the additional PBCH block. For example, the additional PBCH block may be composed of four symbols, one of which may be set to 0.

Fig. 12 is a diagram showing another example of an additional PBCH block according to the present embodiment. Fig. 12 shows an example in which an additional PBCH block exists in some slots in a half frame including an SS/PBCH block that exists at a constant period (SSB period), and the additional PBCH block is composed of four consecutive OFDM symbols. However, the slot in which the additional PBCH block is arranged may be a slot that does not include a candidate resource for the SS/PBCH block. The additional PBCH block is transmitted in a resource corresponding to one SS/PBCH block, and the additional PBCH or a DMRS for the additional PBCH exists in all resources in the additional PBCH block. For example, the sequence of modulation symbols for the additional PBCH is composed of M _symb2 symbols, and may be mapped to resources in which the DMRS for the additional PBCH is not mapped among the first to 240th subcarriers (subcarriers with subcarrier numbers 0 to 239 with respect to the start subcarrier of the additional PBCH block) of the four symbols in the additional PBCH block. The sequence of symbols for the DMRS for the additional PBCH is composed of 240 symbols, and may be mapped to one subcarrier for every four subcarriers among the first to 240th subcarriers (subcarriers with subcarrier numbers 0 to 239 with respect to the start subcarrier of the additional PBCH block). However, the additional PBCH or the DMRS for the additional PBCH may not exist for all resources in the additional PBCH block. For example, the additional PBCH block may be composed of four symbols, one of which is set to 0, and the additional PBCH and the DMRS for the additional PBCH may exist in the remaining three symbols.

Different SSB indices may be assigned to one or more additional PBCH blocks in a half frame (additional PBCH burst set) including an additional PBCH. An additional PBCH block assigned a certain SSB index may be associated with the SS/PBCH block of that SSB index and transmitted periodically by the base station device 3. However, there may be multiple additional PBCH blocks assigned the same SSB index for one SS/PBCH block. For example, additional PBCH blocks assigned the same SSB index may be transmitted multiple times within an SSB period.

The time position of the half frame to which the additional PBCH block is mapped may be determined based on information specifying the SFN and/or information specifying the half frame included in the PBCH of the corresponding SS/PBCH block and/or the additional PBCH of the additional PBCH block and the time offset of the corresponding SS/PBCH block and the additional PBCH block. However, the information specifying the SFN and/or information specifying the half frame included in the additional PBCH of the additional PBCH block may be information specifying the SFN and half frame in which the corresponding SS/PBCH block is transmitted. The terminal device 1 that has received the additional PBCH block may determine the SFN and half frame in which the corresponding SS/PBCH block is transmitted based on the received additional PBCH block.

An SSB index is assigned to the additional PBCH block according to its time position within the transmitted half frame. The terminal device 1 identifies the SSB index based on the additional PBCH information and/or reference signal information contained in the detected additional PBCH block.

SS/PBCH blocks with the same relative time within each SS burst set in the multiple SS burst sets may be assigned the same SSB index. SS/PBCH blocks with the same relative time within each SS burst set in the multiple SS burst sets may be assumed to be QCL (or to have the same downlink transmit beam). In addition, antenna ports with SS/PBCH blocks with the same relative time within each SS burst set in the multiple SS burst sets may be assumed to be QCL with respect to mean delay, Doppler shift, and spatial correlation.

Within a period of a certain SS burst set, SS/PBCH blocks and additional PBCH blocks assigned the same SSB index may be assumed to be QCL with respect to average delay, average gain, Doppler spread, Doppler shift, and spatial correlation.

The terminal device 1 according to this embodiment receives the SS/PBCH block and the corresponding additional PBCH block. The terminal device 1 that detects the PSS and SSS in the SS/PBCH block receives the PBCH in the SS/PBCH block and also receives the additional PBCH in the corresponding additional PBCH block. Since the PBCH in the SS/PBCH block and the additional PBCH in the corresponding additional PBCH block contain the same information, the terminal device 1 can improve the detection accuracy of the information contained in the PBCH. However, the terminal device 1 that receives the additional PBCH block may be only the terminal device 1 having a predetermined capability. For example, a terminal device 1 that has limited capabilities for purposes such as reducing device costs and/or power consumption is said to be compatible with REDCAP (Reduction Capability), and a terminal device 1 that is compatible with REDCAP receives SS/PBCH blocks and/or additional PBCH blocks, while a terminal device 1 that is not compatible with REDCAP receives only SS/PBCH blocks and does not receive additional PBCH blocks.

The terminal device 1 according to this embodiment may receive an SS/PBCH block to which a PSS/SSS, a PBCH, and a DMRS for the PBCH are mapped, transmitted in a certain radio frame, receive an additional PBCH and a DMRS for the additional PBCH, transmitted in the same or a different radio frame as the certain radio frame, and acquire an MIB of a transport block transmitted in the PBCH and the additional PBCH. However, the PBCH and the additional PBCH carry at least an MIB and additional bit information, and the frame number (SFN) of the radio frame in which the SS/PBCH block is transmitted may be identified based on the MIB and the additional bit information.

However, the PBCH may be mapped with a PBCH modulation symbol group generated by performing the first scrambling process, the CRC addition process, the first channel coding process, the first rate matching process, the second scrambling process, and the modulation process on a bit string including the MIB and additional bit information, and the additional PBCH may be mapped with a PBCH modulation symbol group generated by performing the third scrambling process, the CRC addition process, the second channel coding process, the second rate matching process, the fourth scrambling process, and the modulation process on a bit string including the MIB and additional bit information. However, the first scrambling process and the third scrambling process may be scrambling processes based on a part of the bit information of the SFN indicating the frame number of the radio frame in which the SS/PBCH block is transmitted. However, the part of the bit information of the SFN may be information included in the additional bit information included in the PBCH and/or the additional PBCH. However, a part of the bit information of the SFN may be the 2nd LSB and 3rd LSB of the SFN. However, the second scrambling process may be a scrambling process based on the number of bits output by the first rate matching, and the fourth scrambling process may be a scrambling process based on the number of bits output by the second rate matching. However, the first scrambling process and the third scrambling process may be scrambling processes performed using the same bit sequence of the same scrambling sequence, and the second scrambling process and the fourth scrambling process may be scrambling processes performed using different bit sequences.

The terminal device 1 according to this embodiment may receive a PSS/SSS, a PBCH, and an SS/PBCH block to which a DMRS for the PBCH is mapped, transmitted in a certain radio frame, receive an additional PBCH and a DMRS for the additional PBCH, transmitted in the same or a different radio frame as the certain radio frame, and acquire an MIB of a transport block transmitted in the PBCH and the additional PBCH.

Hereinafter, the reference signals described in this embodiment include a downlink reference signal, a synchronization signal, an SS/PBCH block, a downlink DM-RS, a CSI-RS, an uplink reference signal, an SRS, and/or an uplink DM-RS. For example, in this embodiment, the downlink reference signal, the synchronization signal, and/or the SS/PBCH block may be referred to as a reference signal. Reference signals used in the downlink include a downlink reference signal, a synchronization signal, an SS/PBCH block, a downlink DM-RS, a CSI-RS, and the like. Reference signals used in the uplink include an uplink reference signal, an SRS, and/or an uplink DM-RS, and the like.

The reference signal may also be used for radio resource measurement (RRM). The reference signal may also be used for beam management.

Beam management may be a procedure in base station device 3 and/or terminal device 1 to align the directivity of an analog and/or digital beam in a transmitting device (base station device 3 in the case of downlink, terminal device 1 in the case of uplink) with that of an analog and/or digital beam in a receiving device (terminal device 1 in the case of downlink, base station device 3 in the case of uplink) to obtain beam gain.

In addition, procedures for configuring, setting up or establishing a beam pair link may include the following procedures.
・Beam selection
・Beam refinement
・Beam recovery

For example, beam selection may be a procedure for selecting a beam in communication between the base station device 3 and the terminal device 1. Beam improvement may be a procedure for selecting a beam with a higher gain, or changing the beam between the base station device 3 and the terminal device 1 to the optimal one due to the movement of the terminal device 1. Beam recovery may be a procedure for reselecting a beam when the quality of the communication link is degraded due to blockage caused by the passage of an obstruction or a person in communication between the base station device 3 and the terminal device 1.

Beam management may include beam selection, beam improvement. Beam recovery may include the following procedures:
Detecting beam failures, discovering new beams, sending beam recovery requests, and monitoring responses to beam recovery requests.

For example, when selecting a transmission beam of the base station device 3 in the terminal device 1, the RSRP (Reference Signal Received Power) of the SSS included in the CSI-RS or SS/PBCH block may be used, or the CSI may be used. In addition, the CSI-RS resource index (CRI) may be used as a report to the base station device 3, or an index indicated by the sequence of the PBCH included in the SS/PBCH block and/or the demodulation reference signal (DMRS) used for demodulating the PBCH may be used.

When instructing the terminal device 1 to transmit a beam, the base station device 3 instructs the terminal device 1 of a time index of CRI or SS/PBCH, and the terminal device 1 receives based on the time index of the instructed CRI or SS/PBCH. At this time, the terminal device 1 may set a spatial filter based on the time index of the instructed CRI or SS/PBCH and receive. The terminal device 1 may also receive using the assumption of quasi co-location (QCL). When a signal (antenna port, synchronization signal, reference signal, etc.) is "QCL" with another signal (antenna port, synchronization signal, reference signal, etc.) or when "the assumption of QCL is used," it may be interpreted that a signal is associated with another signal.

Two antenna ports are said to be QCL if the long term properties of the channel over which a symbol at one antenna port is carried can be inferred from the channel over which a symbol at the other antenna port is carried. The long term properties of the channel include one or more of delay spread, Doppler spread, Doppler shift, average gain, and average delay. For example, if antenna port 1 and antenna port 2 are QCL with respect to average delay, this means that the receive timing of antenna port 2 can be inferred from the receive timing of antenna port 1.

This QCL can also be extended to beam management. For this purpose, a new QCL extended to space may be defined. For example, the long term properties of the channel in the spatial domain QCL assumption may be the angle of arrival (AoA (Angle of Arrival), ZoA (Zenith angle of Arrival), etc.) and/or angle spread (AngleSpread, e.g. ASA (Angle Spread of Arrival) and ZSA (Zenith angleSpread of Arrival)) in the radio link or channel, the angle of departure (AoD, ZoD, etc.) and its angle spread (AngleSpread, e.g. ASD (AngleSpread of Departure) and ZSD (Zenithangle Spread of Departure)), spatial correlation, and reception spatial parameters.

For example, if it can be considered that there is a QCL between antenna port 1 and antenna port 2 with respect to the receive spatial parameters, this means that the receive beam for receiving a signal from antenna port 2 can be inferred from the receive beam (receive spatial filter) for receiving a signal from antenna port 1.

As QCL types, combinations of long-range properties that may be considered to be QCLs may be defined. For example, the following types may be defined:
Type A: Doppler shift, Doppler spread, average delay, delay spread Type B: Doppler shift, Doppler spread Type C: average delay, Doppler shift Type D: reception spatial parameters

The above-mentioned QCL type may be set and/or indicated as a transmission configuration indication (TCI) in the RRC and/or MAC layer and/or DCI, assuming a QCL between one or two reference signals and a PDCCH or PDSCH DMRS. For example, when SS/PBCH block index #2 and QCL type A+QCL type B are set and/or indicated as one state of TCI when the terminal device 1 receives a PDCCH, the terminal device 1 may receive the PDCCH DMRS by regarding the Doppler shift, Doppler spread, average delay, delay spread, reception spatial parameters, and long-range characteristics of the channel in receiving the SS/PBCH block index #2, and perform synchronization and propagation path estimation. At this time, the reference signal indicated by the TCI (SS/PBCH block in the above example) may be referred to as a source reference signal, and the reference signal influenced by the long-term characteristics inferred from the long-term characteristics of the channel when receiving the source reference signal (PDCCH DMRS in the above example) may be referred to as a target reference signal. In addition, the TCI may be set in the RRC as one or more TCI states and a combination of the source reference signal and the QCL type for each state, and may be indicated to the terminal device 1 by the MAC layer or DCI.

With this method, the operation of the base station device 3 and the terminal device 1 that is equivalent to beam management may be defined as beam management and beam instruction/reporting based on the assumption of QCL in the spatial domain and radio resources (time and/or frequency).

Figure 13 is a diagram showing an example of beamforming. Multiple antenna elements are connected to one transmitting unit (TXRU: Transceiver unit) 50, and the phase is controlled by a phase shifter 51 for each antenna element, and the transmitted signal can be directed in any direction by transmitting from the antenna element 52. Typically, the TXRU may be defined as an antenna port, and only the antenna port may be defined in the terminal device 1. Since the directivity can be directed in any direction by controlling the phase shifter 51, the base station device 3 can communicate with the terminal device 1 using a high-gain beam.

The configuration of the device in this embodiment is described below.

Figure 14 is a schematic block diagram showing the configuration of the terminal device 1 of this embodiment. As shown in the figure, the terminal device 1 is configured to include a wireless transceiver unit 10 and an upper layer processing unit 14. The wireless transceiver unit 10 is configured to include an antenna unit 11, an RF (Radio Frequency) unit 12, and a baseband unit 13. The upper layer processing unit 14 is configured to include a medium access control layer processing unit 15 and a radio resource control layer processing unit 16. The wireless transceiver unit 10 is also referred to as a transmitting unit, a receiving unit, a monitoring unit, or a physical layer processing unit. The upper layer processing unit 14 is also referred to as a processing unit 14, a measuring unit 14, a selecting unit 14, a determining unit 14, or a control unit 14.

The upper layer processing unit 14 outputs uplink data (which may be referred to as a transport block) generated by user operation or the like to the radio transmission/reception unit 10. The upper layer processing unit 14 performs some or all of the processes of a Medium Access Control (MAC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a Radio Resource Control (RRC) layer. The upper layer processing unit 14 may have a function of acquiring bit information of a transport block of an MIB.

The media access control layer processing unit 15 included in the upper layer processing unit 14 performs processing of the MAC layer (media access control layer). The media access control layer processing unit 15 controls the transmission of scheduling requests based on various setting information/parameters managed by the radio resource control layer processing unit 16.

The radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer (radio resource control layer). The radio resource control layer processing unit 16 manages various setting information/parameters of the own device. The radio resource control layer processing unit 16 sets various setting information/parameters based on upper layer signals received from the base station device 3. In other words, the radio resource control layer processing unit 16 sets various setting information/parameters based on information indicating the various setting information/parameters received from the base station device 3. The radio resource control layer processing unit 16 controls (specifies) resource allocation based on downlink control information received from the base station device 3.

The wireless transmission/reception unit 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding. The wireless transmission/reception unit 10 separates, demodulates, and decodes the signal received from the base station device 3, and outputs the decoded information to the upper layer processing unit 14. The wireless transmission/reception unit 10 generates a transmission signal by modulating and encoding data, and transmits it to the base station device 3, etc. The wireless transmission/reception unit 10 outputs the upper layer signal (RRC message), DCI, etc. received from the base station device 3 to the upper layer processing unit 14. In addition, the wireless transmission/reception unit 10 generates and transmits an uplink signal (including PUCCH and/or PUSCH) based on an instruction from the upper layer processing unit 14. The wireless transmission/reception unit 10 may have a function of receiving a PDCCH and/or a PDSCH. The wireless transmission/reception unit 10 may have a function of transmitting one or more PUCCHs and/or PUSCHs. The wireless transmission/reception unit 10 may have a function of receiving DCI on the PDCCH. The radio transmission/reception unit 10 may have a function of outputting DCI received on the PDCCH to the upper layer processing unit 14. The radio transmission/reception unit 10 may have a function of receiving a PSS, an SSS, a PBCH, a DMRS for the PBCH, an additional PBCH, and/or a DMRS for the additional PBCH. The radio transmission/reception unit 10 may have a function of receiving an SS/PBCH block and/or an additional PBCH block.

The RF unit 12 converts the signal received via the antenna unit 11 into a baseband signal by quadrature demodulation (down-converting) and removes unnecessary frequency components. The RF unit 12 outputs the processed analog signal to the baseband unit.

The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 extracts a cyclic
The signal from which the CP has been removed is subjected to a Fast Fourier Transform (FFT) to extract a signal in the frequency domain.

The baseband unit 13 performs an Inverse Fast Fourier Transform (IFFT) on the data to generate an OFDM symbol, adds a CP to the generated OFDM symbol, generates a baseband digital signal, and converts the baseband digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, up-converts the analog signal to a carrier frequency, and transmits it via the antenna unit 11. The RF unit 12 also amplifies the power. The RF unit 12 may also have a function of determining the transmission power of the uplink signal and/or the uplink channel to be transmitted in the serving cell. The RF unit 12 is also referred to as a transmission power control unit.

Figure 15 is a schematic block diagram showing the configuration of the base station device 3 of this embodiment. As shown in the figure, the base station device 3 is configured to include a radio transmission/reception unit 30 and an upper layer processing unit 34. The radio transmission/reception unit 30 is configured to include an antenna unit 31, an RF unit 32, and a baseband unit 33. The upper layer processing unit 34 is configured to include a medium access control layer processing unit 35 and a radio resource control layer processing unit 36. The radio transmission/reception unit 30 is also referred to as a transmission unit, a reception unit, a monitor unit, or a physical layer processing unit. A control unit that controls the operation of each unit based on various conditions may also be provided separately. The upper layer processing unit 34 is also referred to as a processing unit 34, a determination unit 34, or a control unit 34.

The upper layer processing unit 34 performs some or all of the processing of the Medium Access Control (MAC) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Radio Resource Control (RRC) layer. The upper layer processing unit 34 may have a function of generating DCI based on the upper layer signal transmitted to the terminal device 1 and the time resource for transmitting the PUSCH. The upper layer processing unit 34 may have a function of outputting the generated DCI, etc. to the radio transmission/reception unit 30. The upper layer processing unit 34 may have a function of generating bit information of the transport block of the MIB.

The media access control layer processing unit 35 in the upper layer processing unit 34 performs MAC layer processing. The media access control layer processing unit 35 performs processing related to the scheduling request based on various setting information/parameters managed by the radio resource control layer processing unit 36.

The radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs processing of the RRC layer. The radio resource control layer processing unit 36 generates DCI (uplink grant, downlink grant) including resource allocation information for the terminal device 1. The radio resource control layer processing unit 36 generates DCI, downlink data (transport block (TB), random access response (RAR)) arranged in the PDSCH, system information, RRC message, MAC CE (Control Element), etc., or acquires them from the upper node, and outputs them to the radio transmission/reception unit 30. The radio resource control layer processing unit 36 also manages various setting information/parameters of each terminal device 1. The radio resource control layer processing unit 36 may set various setting information/parameters for each terminal device 1 via a signal of the upper layer. That is, the radio resource control layer processing unit 36 transmits/reports information indicating various setting information/parameters. The radio resource control layer processing unit 36 may transmit/report information for identifying the setting of one or more reference signals in a certain cell.

When the base station device 3 transmits an RRC message, MAC CE, and/or PDCCH to the terminal device 1 and the terminal device 1 performs processing based on the reception of the message, the base station device 3 performs processing (control of the terminal device 1 and the system) assuming that the terminal device is performing the processing. In other words, the base station device 3 transmits an RRC message, MAC CE, and/or PDCCH to the terminal device 1 to cause the terminal device to perform processing based on the reception of the message.

The radio transmission/reception unit 30 transmits higher layer signals (RRC messages), DCI, etc. to the terminal device 1. The radio transmission/reception unit 30 also receives uplink signals transmitted from the terminal device 1 based on instructions from the higher layer processing unit 34. The radio transmission/reception unit 30 may have a function of transmitting a PDCCH and/or a PDSCH. The radio transmission/reception unit 30 may have a function of receiving one or more PUCCHs and/or PUSCHs. The radio transmission/reception unit 30 may have a function of transmitting DCI on a PDCCH. The radio transmission/reception unit 30 may have a function of transmitting DCI output by the higher layer processing unit 34 on a PDCCH. The radio transmission/reception unit 30 may have a function of transmitting a PSS, an SSS, a PBCH, a DMRS for the PBCH, an additional PBCH, and/or a DMRS for the additional PBCH. The radio transmission/reception unit 30 may have a function of transmitting an SS/PBCH block and/or an additional PBCH block. The wireless transceiver 30 may have a function of transmitting an RRC message (which may be an RRC parameter). Other than that, some of the functions of the wireless transceiver 30 are similar to those of the wireless transceiver 10, and therefore will not be described. Note that when the base station device 3 is connected to one or more transmission/reception points 4, some or all of the functions of the wireless transceiver 30 may be included in each transmission/reception point 4.

The upper layer processing unit 34 also transmits (transfers) or receives control messages or user data between base station devices 3 or between higher-level network devices (MME, S-GW (Serving-GW)) and base station device 3. In FIG. 15, other components of base station device 3 and transmission paths for data (control information) between the components are omitted, but it is clear that the base station device 3 has multiple blocks as components having other functions necessary for operating as a base station device 3. For example, the upper layer processing unit 34 includes a radio resource management layer processing unit and an application layer processing unit.

The "parts" in the diagram are elements that realize the functions and procedures of the terminal device 1 and base station device 3, and can also be expressed by terms such as sections, circuits, component devices, and units.

Each of the units numbered 10 to 16 in the terminal device 1 may be configured as a circuit. Each of the units numbered 30 to 36 in the base station device 3 may be configured as a circuit.

(1) A terminal device 1 in a first aspect of the present invention includes a receiver 10 that receives a first block (SS/PBCH block) to which a PSS, SSS, a first PBCH (PBCH) and a first DMRS (DMRS for PBCH) are mapped, and receives a second PBCH (additional PBCH) and a second DMRS (DMRS for additional PBCH) in a resource different from the first block, and a processor 14 that acquires first bit information of a first transport block (transport block of MIB), in which the first PBCH and the second PBCH carry a first bit string including the first bit information and second bit information (additional bit information), and the second bit information includes information of a part of the bit string of the frame number (SFN) of the radio frame in which the first block is transmitted.

(2) A base station device 3 according to a second aspect of the present invention includes a transmitter 30 that transmits a first block (SS/PBCH block) to which a PSS, an SSS, a first PBCH (PBCH), and a first DMRS (DMRS for PBCH) are mapped, and transmits a second PBCH (additional PBCH) and a second DMRS (DMRS for additional PBCH) using resources different from those of the first block, and a processor 34 that generates first bit information of a first transport block (transport block of MIB);
The first PBCH and the second PBCH carry a first bit string including the first bit information and second bit information (additional bit information), and the second bit information includes information of a portion of a bit string of a frame number (SFN) of the radio frame in which the first block was transmitted.

(3) A terminal device 1 in a third aspect of the present invention includes a receiver 10 that receives a first block (SS/PBCH block) to which a PSS, an SSS, a first PBCH (PBCH), and a first DMRS (DMRS for PBCH) are mapped, and receives a second PBCH (additional PBCH) and a second DMRS (DMRS for additional PBCH) with resources different from those of the first block, and a processor 14 that acquires first bit information of a first transport block (transport block of MIB), and the first PBCH includes the first bit information and the second bit information (additional PBCH). A first modulation symbol group generated by performing a first scrambling process, a CRC assignment process, a first channel coding process, a first rate matching process, a second scrambling process, and a modulation process on a first bit string including the first bit information and third bit information (additional bit information) is mapped to the second PBCH, and a second modulation symbol group generated by performing a third scrambling process, a CRC assignment process, a second channel coding process, a second rate matching process, a fourth scrambling process, and a modulation process on a second bit string including the first bit information and third bit information (additional bit information) is mapped to the second PBCH.

(4) In a third aspect of the present invention, the first scrambling process may be performed based on a part of a bit string of a frame number of a radio frame in which the first block is transmitted, and the third scrambling process may be performed based on a part of a bit string of a frame number of a radio frame in which the first block is transmitted.

(5) In the third aspect of the present invention, the second scrambling process may be performed based on the number of bits of the bit string output by the first rate matching, and the fourth scrambling process may be performed based on the number of bits of the bit string output by the second rate matching.

(6) In the third aspect of the present invention, the second bit information and the third bit information may be the same bit information.

(7) A base station device 3 in a fourth aspect of the present invention includes a transmitter 30 that transmits a first block (SS/PBCH block) to which a PSS, an SSS, a first PBCH (PBCH), and a first DMRS (DMRS for PBCH) are mapped, and transmits a second PBCH (additional PBCH) and a second DMRS (DMRS for additional PBCH) using resources different from those of the first block, and a processor 34 that generates first bit information of a first transport block (transport block of MIB), and the first PBCH includes the first bit information and the second bit information (additional PBCH). A first modulation symbol group generated by performing a first scrambling process, a CRC assignment process, a first channel coding process, a first rate matching process, a second scrambling process, and a modulation process on a first bit string including the first bit information and third bit information (additional bit information) is mapped to the second PBCH, and a second modulation symbol group generated by performing a third scrambling process, a CRC assignment process, a second channel coding process, a second rate matching process, a fourth scrambling process, and a modulation process on a second bit string including the first bit information and third bit information (additional bit information) is mapped to the second PBCH.

(8) In a fourth aspect of the present invention, the first scrambling process is performed based on a part of a bit string of a frame number of a radio frame in which the first block is transmitted,
The third scrambling process may be performed based on a part of a bit string of a frame number of a radio frame in which the first block is transmitted.

(9) In a fourth aspect of the present invention, the second scrambling process may be performed based on the number of bits of the bit string output by the first rate matching, and the fourth scrambling process may be performed based on the number of bits of the bit string output by the second rate matching.

(10) In the fourth aspect of the present invention, the second bit information and the third bit information may be the same bit information.

(11) A terminal device 1 in a fifth aspect of the present invention includes a receiver 10 that receives a first PBCH (PBCH) included in a first block (SS/PBCH block) transmitted in a first time period and receives a second PBCH (additional PBCH) included in a second block (additional PBCH block) transmitted from an OFDM symbol after a first time offset from the first OFDM symbol of the first block, and a processor 14 that acquires first bit information of a first transport block (transport block of MIB), where the first PBCH and the second PBCH carry the first bit information, the first block is composed of 4 OFDM symbols including a PSS, an SSS, the first PBCH, and a first DMRS (DMRS for PBCH), and the second block is composed of 3 OFDM symbols including the second PBCH and a second DMRS.

(12) In the fifth aspect of the present invention, the first time offset may have a duration of at least half a frame.

(13) In the fifth aspect of the present invention, the first time offset may be defined as a predetermined number of OFDM symbols.

(14) A base station device 3 in a sixth aspect of the present invention includes a transmitter 30 that transmits a first PBCH (PBCH) included in a first block (SS/PBCH block) in a first time period and transmits a second PBCH (additional PBCH) included in a second block (additional PBCH block) transmitted from an OFDM symbol after a first time offset from the first OFDM symbol of the first block, and a processor 34 that generates first bit information of a first transport block (transport block of MIB), the first PBCH and the second PBCH carry the first bit information, the first block is composed of 4 OFDM symbols including a PSS, an SSS, the first PBCH, and a first DMRS (DMRS for PBCH), and the second block is composed of 3 OFDM symbols including the second PBCH and a second DMRS (DMRS for additional PBCH).

(15) In the sixth aspect of the present invention, the first time offset may have a duration of at least half a frame.

(16) In the sixth aspect of the present invention, the first time offset may be defined as a predetermined number of OFDM symbols.

This allows the terminal device 1 to efficiently communicate with the base station device 3. For example, in DCI that schedules data of different services (eMBB, URLLC, and/or mMTC, etc.), time resources for receiving PDSCH and/or PUSCH
In addition, the base station device 3 can efficiently communicate with the terminal device 1. For example, in DCI that schedules data of different services, a notification method appropriate for each service can be used to indicate a time resource for transmitting the PDSCH and/or a time resource for receiving the PUSCH.

The program that runs on the device according to the present invention may be a program that controls a Central Processing Unit (CPU) or the like to cause a computer to function so as to realize the functions of the embodiments according to the present invention. The program or information handled by the program is temporarily stored in a volatile memory such as a Random Access Memory (RAM), a non-volatile memory such as a flash memory, a Hard Disk Drive (HDD), or other storage device system.

A program for implementing the functions of the embodiments of the present invention may be recorded on a computer-readable recording medium. The program may be implemented by loading the program recorded on the recording medium into a computer system and executing it. The term "computer system" as used here refers to a computer system built into a device, and includes hardware such as an operating system and peripheral devices. The term "computer-readable recording medium" may also refer to a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a medium that dynamically holds a program for a short period of time, or any other recording medium that is readable by a computer.

In addition, each functional block or feature of the device used in the above-mentioned embodiment may be implemented or performed by an electric circuit, for example, an integrated circuit or multiple integrated circuits. The electric circuit designed to perform the functions described herein may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or a combination thereof. The general-purpose processor may be a microprocessor, or a conventional processor, controller, microcontroller, or state machine. The electric circuit may be composed of digital circuits or analog circuits. In addition, if a technology for integrated circuitization that replaces current integrated circuits emerges due to advances in semiconductor technology, one or more aspects of the present invention may use a new integrated circuit based on that technology.

Note that, although the embodiments of the present invention have been described as being applied to a communication system consisting of a base station device and a terminal device, the present invention can also be applied to a system in which terminals communicate with each other, such as D2D (Device to Device).

The present invention is not limited to the above-mentioned embodiment. In the embodiment, an example of a device is described, but the present invention is not limited to this and can be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, for example, AV equipment, kitchen equipment, cleaning/washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes within the scope of the gist of the present invention are also included. Furthermore, the present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, configurations in which elements described in the above embodiments are replaced with elements that have the same effect are also included.

1 (1A, 1B) Terminal device 3 Base station device 4 Transmission/reception point (TRP)
10 Radio transmission/reception unit 11 Antenna unit 12 RF unit 13 Baseband unit 14 Upper layer processing unit 15 Media access control layer processing unit 16 Radio resource control layer processing unit 30 Radio transmission/reception unit 31 Antenna unit 32 RF unit 33 Baseband unit 34 Upper layer processing unit 35 Media access control layer processing unit 36 Radio resource control layer processing unit 50 Transmission unit (TXRU)
51 Phase shifter 52 Antenna element

Claims (5)

A terminal device,
a receiving unit that receives a first PBCH included in a first block transmitted in a first time period, and receives a second PBCH included in a second block transmitted from an OFDM symbol after a first time offset from a first OFDM symbol of the first block;
a processing unit that obtains first bit information of a first transport block,
the first PBCH and the second PBCH carry the first bit information;
The first block is composed of 4 OFDM symbols including a PSS, an SSS, the first PBCH, and a first DMRS;
The second block is composed of 3 OFDM symbols including the second PBCH and a second DMRS ;
A terminal device , wherein the first time offset has a time length of at least half a frame . The terminal device according to claim 1, wherein the first time offset is defined by a predetermined number of OFDM symbols. A base station device,
a transmitter that transmits a first PBCH included in a first block in a first time period and transmits a second PBCH included in a second block transmitted from an OFDM symbol after a first time offset from a first OFDM symbol of the first block;
a processing unit that generates first bit information of a first transport block,
the first PBCH and the second PBCH carry the first bit information;
The first block is composed of 4 OFDM symbols including a PSS, an SSS, the first PBCH, and a first DMRS;
The second block is composed of 3 OFDM symbols including the second PBCH and a second DMRS ;
A base station device , wherein the first time offset has a time length of at least half a frame . The base station device according to claim 3, wherein the first time offset is defined by a predetermined number of OFDM symbols. A communication method for a base station device, comprising:
Transmitting a first PBCH included in a first block in a first time period, and transmitting a second PBCH included in a second block transmitted from an OFDM symbol after a first time offset from a first OFDM symbol of the first block;
generating first bit information of a first transport block;
the first PBCH and the second PBCH carry the first bit information;
The first block is composed of 4 OFDM symbols including a PSS, an SSS, the first PBCH, and a first DMRS;
The second block is composed of 3 OFDM symbols including the second PBCH and a second DMRS ;
The communication method , wherein the first time offset is a time length equal to or greater than a half frame .

Images