WO2018230879A1 - 동기 신호 블록을 송수신하는 방법 및 이를 위한 장치 - Google Patents
동기 신호 블록을 송수신하는 방법 및 이를 위한 장치 Download PDFInfo
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- WO2018230879A1 WO2018230879A1 PCT/KR2018/006448 KR2018006448W WO2018230879A1 WO 2018230879 A1 WO2018230879 A1 WO 2018230879A1 KR 2018006448 W KR2018006448 W KR 2018006448W WO 2018230879 A1 WO2018230879 A1 WO 2018230879A1
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- ssb
- sync signal
- signal block
- ssbs
- khz
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
- H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0076—Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0042—Intra-user or intra-terminal allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2615—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid frequency-time division multiple access [FDMA-TDMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a method for transmitting and receiving a sync signal block and an apparatus therefor, and more particularly, to a position where a sync signal block can be transmitted when a numerology for a sync signal block and a neurology for data are different.
- a method and apparatus for transmitting and receiving a sync signal block In another configuration, and relates to a method and apparatus for transmitting and receiving a sync signal block.
- next generation 5G system which is an improved wireless broadband communication than the existing LTE system, is required.
- eMBB Enhanced Mobile BroadBand
- URLLC Ultra-reliability and low-latency communication
- mMTC Massive Machine-Type Communications
- eMBB is a next generation mobile communication scenario having characteristics such as High Spectrum Efficiency, High User Experienced Data Rate, High Peak Data Rate, and URLLC is a next generation mobile communication scenario having characteristics such as Ultra Reliable, Ultra Low Latency, Ultra High Availability, etc.
- mMTC is a next generation mobile communication scenario with low cost, low energy, short packet, and mass connectivity. (e.g., IoT).
- the present invention provides a method and apparatus for transmitting and receiving a sync signal block.
- the method in a method of receiving a synchronization signal block by a terminal, includes receiving at least one synchronization signal block mapped to a plurality of symbols, including the plurality of symbols.
- the method includes receiving at least one synchronization signal block mapped to a plurality of symbols, including the plurality of symbols.
- two regions for candidate sync signal blocks to which the at least one sync signal block can be received are allocated, and within the specific time interval, the time between the two regions and the two The time before the region and the time after the two regions may be the same.
- the candidate sync signal blocks may be continuously arranged by a first number.
- the subcarrier spacing of the sync signal block is the first value
- four symbols are included within the same time
- eight symbols within the same time. This may be included.
- an area for the candidate sync signal blocks may be continuously arranged in the half frame by the second number in units of the specific time interval, and then continuously arranged by the second number again after a predetermined time.
- regions for the candidate sync signal blocks are continuously arranged by a second number in units of the specific time interval, and are repeated four times at intervals of the predetermined time. Can be arranged.
- the number of slots included in the predetermined time is 2, and when the subcarrier spacing of the sync signal block is the second value, the slots included within the predetermined time The number may be four.
- the frequency band in which the terminal operates may be greater than or equal to a specific value.
- the same time may be composed of two symbols.
- the specific time interval in which the two regions are allocated may be repeatedly arranged locally within a half frame by a specific number determined based on the frequency band in which the terminal operates.
- the specific number may be 2 when the frequency band in which the terminal operates is less than or equal to a specific value, and the specific number may be 4 when the frequency band in which the terminal operates is greater than or equal to a specific value.
- a terminal for receiving a synchronization signal block comprising: a transceiver for transmitting and receiving a signal with a base station; And a processor connected to the transceiver and controlling to receive at least one sync signal block mapped to a plurality of symbols, wherein the at least one sync signal block is received in a specific time interval including the plurality of symbols.
- Two regions for candidate sync signal blocks that may be allocated are allocated, and within the specific time interval, the time between the two regions, the time before the two regions and the time after the two regions will be the same. Can be.
- a method for transmitting a synchronization signal block by a base station including transmitting at least one synchronization signal block mapped to a plurality of symbols, including the plurality of symbols
- two regions for candidate sync signal blocks to which the at least one sync signal block can be received are allocated, and within the specific time interval, the time between the two regions and the two The time before the region and the time after the two regions may be the same.
- a base station for transmitting a sync signal block
- the base station comprising: a transceiver for transmitting and receiving a signal with a terminal; And a processor connected to the transceiver and controlling to transmit at least one sync signal block mapped to a plurality of symbols, wherein the at least one sync signal block is received in a specific time interval including the plurality of symbols.
- Two regions for candidate sync signal blocks that may be allocated are allocated, and within the specific time interval, the time between the two regions, the time before the two regions and the time after the two regions will be the same. Can be.
- FIG. 1 is a diagram illustrating a control plane and a user plane structure of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard.
- FIG. 2 is a diagram for explaining a physical channel used in the 3GPP system and a general signal transmission method using the same.
- FIG 3 illustrates a radio frame structure for transmission of a synchronization signal (SS) used in an LTE system.
- SS synchronization signal
- NR new radio access technology
- FIG. 5 shows examples of a connection scheme of a TXRU and an antenna element.
- FIG. 6 abstractly illustrates a hybrid beamforming structure in terms of a transceiver unit (TXRU) and a physical antenna.
- TXRU transceiver unit
- FIG. 7 shows a beam sweeping operation for a synchronization signal and system information during downlink transmission.
- NR 8 illustrates a cell of a new radio access technology (NR) system.
- NR new radio access technology
- 9 to 14 show examples of configuring an SS burst according to the subcarrier spacing of the SSB.
- 15 to 29 show examples of configuring a candidate SSB in an SS burst.
- 30 to 31 show examples for indicating ATSS actually transmitted among candidate SSBs.
- FIG. 32 illustrates a block diagram of a communication device according to an embodiment of the present invention.
- the present specification describes an embodiment of the present invention using an LTE system, an LTE-A system, and an NR system, the embodiment of the present invention as an example may be applied to any communication system corresponding to the above definition.
- the specification of the base station may be used as a generic term including a remote radio head (RRH), an eNB, a transmission point (TP), a reception point (RP), a relay, and the like.
- RRH remote radio head
- TP transmission point
- RP reception point
- relay and the like.
- the 3GPP-based communication standard provides downlink physical channels corresponding to resource elements carrying information originating from an upper layer and downlink corresponding to resource elements used by the physical layer but not carrying information originating from an upper layer.
- Physical signals are defined.
- a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical multicast channel (PMCH), a physical control format indicator channel (physical control) format indicator channel (PCFICH), physical downlink control channel (PDCCH) and physical hybrid ARQ indicator channel (PHICH) are defined as downlink physical channels, reference signal and synchronization signal Is defined as downlink physical signals.
- a reference signal also referred to as a pilot, refers to a signal of a predefined special waveform that the gNB and the UE know from each other.
- a cell specific RS, UE- UE-specific RS, positioning RS (PRS), and channel state information RS (CSI-RS) are defined as downlink reference signals.
- the 3GPP LTE / LTE-A standard corresponds to uplink physical channels corresponding to resource elements carrying information originating from a higher layer and resource elements used by the physical layer but not carrying information originating from an upper layer. Uplink physical signals are defined.
- PUSCH physical uplink shared channel
- PUCCH physical uplink control channel
- PRACH physical random access channel
- DMRS demodulation reference signal
- SRS sounding reference signal
- Physical Downlink Control CHannel / Physical Control Format Indicator CHannel (PCFICH) / PHICH (Physical Hybrid automatic retransmit request Indicator CHannel) / PDSCH (Physical Downlink Shared CHannel) are respectively DCI (Downlink Control Information) / CFI ( Means a set of time-frequency resources or a set of resource elements that carry downlink format ACK / ACK / NACK (ACKnowlegement / Negative ACK) / downlink data, and also a Physical Uplink Control CHannel (PUCCH) / Physical (PUSCH) Uplink Shared CHannel / PACH (Physical Random Access CHannel) means a set of time-frequency resources or a set of resource elements that carry uplink control information (UCI) / uplink data / random access signals, respectively.
- DCI Downlink Control Information
- CFI Means a set of time-frequency resources or a set of resource elements that carry downlink format ACK / ACK
- the PDCCH / PCFICH / PHICH / PDSCH / PUCCH / PUSCH / PRACH resource is referred to below:
- the expression that the user equipment transmits the PUCCH / PUSCH / PRACH is hereinafter referred to as uplink control information / uplink on or through PUSCH / PUCCH / PRACH, respectively.
- the gNB transmits PDCCH / PCFICH / PHICH / PDSCH is used for downlink data / control information on or through PDCCH / PCFICH / PHICH / PDSCH, respectively. It is used in the same sense as sending it.
- an OFDM symbol / subcarrier / RE to which CRS / DMRS / CSI-RS / SRS / UE-RS is assigned or configured is configured as CRS / DMRS / CSI-RS / SRS / UE-RS symbol / carrier. It is called / subcarrier / RE.
- an OFDM symbol assigned or configured with a tracking RS (TRS) is referred to as a TRS symbol
- a subcarrier assigned or configured with a TRS is called a TRS subcarrier and is assigned a TRS.
- the configured RE is called a TRS RE.
- a subframe configured for TRS transmission is called a TRS subframe.
- a subframe in which a broadcast signal is transmitted is called a broadcast subframe or a PBCH subframe
- a subframe in which a sync signal (for example, PSS and / or SSS) is transmitted is a sync signal subframe or a PSS / SSS subframe. It is called.
- An OFDM symbol / subcarrier / RE to which PSS / SSS is assigned or configured is referred to as a PSS / SSS symbol / subcarrier / RE, respectively.
- the CRS port, the UE-RS port, the CSI-RS port, and the TRS port are respectively an antenna port configured to transmit CRS, an antenna port configured to transmit UE-RS, An antenna port configured to transmit CSI-RS and an antenna port configured to transmit TRS.
- Antenna ports configured to transmit CRSs can be distinguished from each other by the location of REs occupied by the CRS according to the CRS ports, and antenna ports configured to transmit UE-RSs.
- the antenna ports configured to transmit the CSI-RSs can be distinguished from each other by the positions of the REs occupied by the UE-RS according to the -RS ports, and the CSI-RSs occupy They can be distinguished from each other by the location of the REs.
- CRS / UE-RS / CSI-RS / TRS port may be used as a term for a pattern of REs occupied by CRS / UE-RS / CSI-RS / TRS in a certain resource region.
- FIG. 1 is a diagram illustrating a control plane and a user plane structure of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard.
- the control plane refers to a path through which control messages used by a user equipment (UE) and a network to manage a call are transmitted.
- the user plane refers to a path through which data generated at an application layer, for example, voice data or Internet packet data, is transmitted.
- the physical layer which is the first layer, provides an information transfer service to an upper layer by using a physical channel.
- the physical layer is connected to the upper layer of the medium access control layer through a transport channel. Data moves between the medium access control layer and the physical layer through the transmission channel. Data moves between the physical layer between the transmitting side and the receiving side through the physical channel.
- the physical channel utilizes time and frequency as radio resources.
- the physical channel is modulated in an Orthogonal Frequency Division Multiple Access (OFDMA) scheme in downlink, and modulated in a Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme in uplink.
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the medium access control (MAC) layer of the second layer provides a service to a radio link control (RLC) layer, which is a higher layer, through a logical channel.
- RLC radio link control
- the RLC layer of the second layer supports reliable data transmission.
- the function of the RLC layer may be implemented as a functional block inside the MAC.
- the Packet Data Convergence Protocol (PDCP) layer of the second layer performs a header compression function to reduce unnecessary control information in order to efficiently transmit IP packets such as IPv4 or IPv6 in a narrow bandwidth wireless interface.
- PDCP Packet Data Convergence Protocol
- the Radio Resource Control (RRC) layer located at the bottom of the third layer is defined only in the control plane.
- the RRC layer is responsible for controlling logical channels, transmission channels, and physical channels in connection with configuration, reconfiguration, and release of radio bearers.
- the radio bearer refers to a service provided by the second layer for data transmission between the terminal and the network.
- the RRC layers of the UE and the network exchange RRC messages with each other. If there is an RRC connected (RRC Connected) between the UE and the RRC layer of the network, the UE is in an RRC connected mode, otherwise it is in an RRC idle mode.
- the non-access stratum (NAS) layer above the RRC layer performs functions such as session management and mobility management.
- the downlink transmission channel for transmitting data from the network to the UE includes a broadcast channel (BCH) for transmitting system information, a paging channel (PCH) for transmitting a paging message, and a downlink shared channel (SCH) for transmitting user traffic or a control message.
- BCH broadcast channel
- PCH paging channel
- SCH downlink shared channel
- Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
- the uplink transmission channel for transmitting data from the terminal to the network includes a random access channel (RAC) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or a control message.
- RAC random access channel
- SCH uplink shared channel
- the logical channel mapped to the transmission channel includes a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), and an MTCH (multicast). Traffic Channel).
- BCCH broadcast control channel
- PCCH paging control channel
- CCCH common control channel
- MCCH multicast control channel
- MTCH multicast. Traffic Channel
- FIG. 2 is a diagram for explaining physical channels used in a 3GPP system and a general signal transmission method using the same.
- the UE performs an initial cell search operation such as synchronizing with the base station (S201).
- the terminal may receive a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station to synchronize with the base station and obtain information such as a cell ID. have.
- the terminal may receive a physical broadcast channel from the base station to obtain broadcast information in a cell.
- the terminal may receive a downlink reference signal (DL RS) in the initial cell search step to check the downlink channel state.
- DL RS downlink reference signal
- the UE Upon completion of the initial cell search, the UE acquires more specific system information by receiving a physical downlink control channel (PDSCH) according to a physical downlink control channel (PDCCH) and information on the PDCCH. It may be (S202).
- PDSCH physical downlink control channel
- PDCCH physical downlink control channel
- the terminal may perform a random access procedure (RACH) for the base station (steps S203 to S206).
- RACH random access procedure
- the UE may transmit a specific sequence as a preamble through a physical random access channel (PRACH) (S203 and S205), and receive a response message for the preamble through the PDCCH and the corresponding PDSCH ( S204 and S206).
- PRACH physical random access channel
- a contention resolution procedure may be additionally performed.
- the UE After performing the above-described procedure, the UE performs a PDCCH / PDSCH reception (S207) and a physical uplink shared channel (PUSCH) / physical uplink control channel (Physical Uplink) as a general uplink / downlink signal transmission procedure.
- Control Channel (PUCCH) transmission (S208) may be performed.
- the terminal receives downlink control information (DCI) through the PDCCH.
- DCI downlink control information
- the DCI includes control information such as resource allocation information for the terminal, and the format is different according to the purpose of use.
- the control information transmitted by the terminal to the base station through the uplink or received by the terminal from the base station includes a downlink / uplink ACK / NACK signal, a channel quality indicator (CQI), a precoding matrix index (PMI), and a rank indicator (RI). ), And the like.
- the terminal may transmit the above-described control information such as CQI / PMI / RI through the PUSCH and / or PUCCH.
- FIG. 3 illustrates a radio frame structure for transmission of a synchronization signal (SS) in an LTE / LTE-A based wireless communication system.
- FIG. 3 illustrates a radio frame structure for transmission of a synchronization signal and a PBCH in a frequency division duplex (FDD), and
- FIG. 3 (a) is configured as a normal cyclic prefix (CP).
- FIG. 3B illustrates a transmission position of an SS and a PBCH in a radio frame.
- PSS primary synchronization signal
- SSS secondary synchronization signal
- PSS is used to obtain time domain synchronization and / or frequency domain synchronization such as OFDM symbol synchronization, slot synchronization, etc.
- SSS is used for frame synchronization, cell group ID and / or cell CP configuration (i.e., general CP or extension). It is used to get usage information of CP).
- PSS and SSS are transmitted in two OFDM symbols of every radio frame, respectively.
- the SS may be configured in the first slot of subframe 0 and the first slot of subframe 5 in consideration of 4.6 ms, which is a Global System for Mobile Communication (GSM) frame length.
- GSM Global System for Mobile Communication
- the PSS is transmitted in the last OFDM symbol of the first slot of subframe 0 and the last OFDM symbol of the first slot of subframe 5, respectively, and the SSS is the second to second OFDM symbols and subframe of the first slot of subframe 0, respectively.
- the boundary of the radio frame can be detected through the SSS.
- the PSS is transmitted in the last OFDM symbol of the slot and the SSS is transmitted in the OFDM symbol immediately before the PSS.
- the transmission diversity scheme of the SS uses only a single antenna port and is not defined in the standard.
- the UE Since the PSS is transmitted every 5 ms, the UE detects the PSS to know that the corresponding subframe is one of the subframe 0 and the subframe 5, but the subframe may not know what the subframe 0 and the subframe 5 specifically. . Therefore, the UE does not recognize the boundary of the radio frame only by the PSS. That is, frame synchronization cannot be obtained only by PSS.
- the UE detects the boundary of the radio frame by detecting the SSS transmitted twice in one radio frame but transmitted as different sequences.
- the UE that performs a cell discovery process using PSS / SSS and determines a time and frequency parameter required to perform demodulation of DL signals and transmission of UL signals at an accurate time point is further determined from the eNB.
- system information required for system configuration of the system must be obtained.
- System information is configured by a Master Information Block (MIB) and System Information Blocks (SIBs).
- MIB Master Information Block
- SIBs System Information Blocks
- Each system information block includes a collection of functionally related parameters, and includes a master information block (MIB), a system information block type 1 (SIB1), and a system information block type according to the included parameters.
- MIB Master Information Block
- SIB1 system information block type 1
- SIB3 System Information Block Type 2
- the MIB contains the most frequently transmitted parameters that are necessary for the UE to have initial access to the eNB's network.
- the UE may receive the MIB via a broadcast channel (eg, PBCH).
- PBCH broadcast channel
- the MIB includes a downlink system bandwidth (dl-Bandwidth, DL BW), a PHICH configuration, and a system frame number (SFN). Therefore, the UE can know the information on the DL BW, SFN, PHICH configuration explicitly by receiving the PBCH.
- the information that the UE implicitly (implicit) through the reception of the PBCH includes the number of transmit antenna ports of the eNB.
- Information about the number of transmit antennas of the eNB is implicitly signaled by masking (eg, XOR operation) a sequence corresponding to the number of transmit antennas to a 16-bit cyclic redundancy check (CRC) used for error detection of the PBCH.
- masking eg, XOR operation
- CRC cyclic redundancy check
- SIB1 includes not only information on time domain scheduling of other SIBs, but also parameters necessary for determining whether a specific cell is a cell suitable for cell selection. SIB1 is received by the UE through broadcast signaling or dedicated signaling.
- the DL carrier frequency and the corresponding system bandwidth can be obtained by the MIB carried by the PBCH.
- the UL carrier frequency and corresponding system bandwidth can be obtained through system information that is a DL signal.
- the UE applies the value of the DL BW in the MIB to the UL-bandwidth (UL BW) until a system information block type 2 (SystemInformationBlockType2, SIB2) is received.
- the UE may acquire a system information block type 2 (SystemInformationBlockType2, SIB2) to determine the entire UL system band that can be used for UL transmission through UL-carrier frequency and UL-bandwidth information in the SIB2. .
- PSS / SSS and PBCH are transmitted only within a total of six RBs, that is, a total of 72 subcarriers, three on the left and right around a DC subcarrier within a corresponding OFDM symbol, regardless of the actual system bandwidth. Therefore, the UE is configured to detect or decode the SS and the PBCH regardless of the downlink transmission bandwidth configured for the UE.
- the UE may perform a random access procedure to complete the access to the eNB. To this end, the UE may transmit a preamble through a physical random access channel (PRACH) and receive a response message for the preamble through a PDCCH and a PDSCH.
- PRACH physical random access channel
- additional PRACH transmission and contention resolution procedure such as PDCCH and PDSCH corresponding to the PDCCH may be performed.
- the UE may perform PDCCH / PDSCH reception and PUSCH / PUCCH transmission as a general uplink / downlink signal transmission procedure.
- the random access process is also referred to as a random access channel (RACH) process.
- the random access procedure is used for various purposes, such as initial access, random access procedure, initial access, uplink synchronization coordination, resource allocation, handover, and the like.
- the random access process is classified into a contention-based process and a dedicated (ie non-competition-based) process.
- the contention-based random access procedure is generally used, including initial access, and the dedicated random access procedure is limited to handover and the like.
- the UE randomly selects a RACH preamble sequence. Therefore, it is possible for a plurality of UEs to transmit the same RACH preamble sequence at the same time, which requires a contention cancellation process later.
- the dedicated random access process the UE uses the RACH preamble sequence that is allocated only to the UE by the eNB. Therefore, the random access procedure can be performed without collision with another UE.
- the contention-based random access procedure includes four steps.
- the messages transmitted in steps 1 to 4 may be referred to as messages 1 to 4 (Msg1 to Msg4), respectively.
- Step 1 RACH preamble (via PRACH) (UE to eNB)
- Step 2 random access response (RAR) (via PDCCH and PDSCH) (eNB to UE)
- Step 3 Layer 2 / Layer 3 message (via PUSCH) (UE to eNB)
- Step 4 Contention Resolution Message (eNB to UE)
- the dedicated random access procedure includes three steps.
- the messages transmitted in steps 0 to 2 may be referred to as messages 0 to 2 (Msg0 to Msg2), respectively.
- uplink transmission ie, step 3) corresponding to the RAR may also be performed.
- the dedicated random access procedure may be triggered using a PDCCH (hereinafter, referred to as a PDCCH order) for the purpose of instructing the base station to transmit the RACH preamble.
- Step 0 RACH preamble allocation via dedicated signaling (eNB to UE)
- Step 1 RACH preamble (via PRACH) (UE to eNB)
- Step 2 Random Access Response (RAR) (via PDCCH and PDSCH) (eNB to UE)
- RAR Random Access Response
- the UE After transmitting the RACH preamble, the UE attempts to receive a random access response (RAR) within a pre-set time window. Specifically, the UE attempts to detect a PDCCH (hereinafter, RA-RNTI PDCCH) having a random access RNTI (RA-RNTI) (eg, CRC in the PDCCH is masked to RA-RNTI) within a time window. Upon detecting the RA-RNTI PDCCH, the UE checks whether there is a RAR for itself in the PDSCH corresponding to the RA-RNTI PDCCH.
- RA-RNTI PDCCH a PDCCH having a random access RNTI (RA-RNTI) (eg, CRC in the PDCCH is masked to RA-RNTI)
- RA-RNTI PDCCH a random access RNTI
- the RAR includes timing advance (TA) information indicating timing offset information for UL synchronization, UL resource allocation information (UL grant information), a temporary terminal identifier (eg, temporary cell-RNTI, TC-RNTI), and the like. .
- the UE may perform UL transmission (eg, Msg3) according to the resource allocation information and the TA value in the RAR.
- HARQ is applied to UL transmission corresponding to the RAR. Therefore, after transmitting the Msg3, the UE may receive reception response information (eg, PHICH) corresponding to the Msg3.
- the random access preamble ie, the RACH preamble
- the RACH preamble consists of a cyclic prefix of length T CP and a sequence portion of length T SEQ in the physical layer.
- the T SEQ of the T CP depends on the frame structure and the random access configuration.
- the preamble format is controlled by higher layers.
- the PACH preamble is transmitted in a UL subframe. Transmission of the random access preamble is restricted to certain time and frequency resources. These resources are referred to as PRACH resources, and the PRACH resources are numbered in order of subframe number in the radio frame, followed by increasing PRBs in the frequency domain, so that index 0 corresponds to the lower number PRB and subframe in the radio frame. Lose. Random access resources are defined according to the PRACH configuration index (see 3GPP TS 36.211 standard document). The PRACH configuration index is given by the higher layer signal (sent by the eNB).
- the subcarrier spacing for the random access preamble is defined as 1.25 kHz for the preamble formats 0 to 3 and 7.5 kHz for the preamble format 4 (3GPP TS 36.211 Reference).
- the new RAT system uses an OFDM transmission scheme or a similar transmission scheme.
- the new RAT system may follow different OFDM parameters than the OFDM parameters of LTE.
- the new RAT system can follow the legacy of existing LTE / LTE-A but have a larger system bandwidth (eg, 100 MHz).
- one cell may support a plurality of neurology. That is, UEs operating with different numerologies may coexist in one cell.
- the radio frame used in the 3GPP LTE / LTE-A system has a length of 10 ms (307200 T s ) and consists of 10 equally sized subframes (SF). Numbers may be assigned to 10 subframes in one radio frame.
- Each subframe has a length of 1 ms and consists of two slots. 20 slots in one radio frame may be sequentially numbered from 0 to 19. Each slot is 0.5ms long.
- the time for transmitting one subframe is defined as a transmission time interval (TTI).
- TTI transmission time interval
- the time resource may be classified by a radio frame number (also called a radio frame index), a subframe number (also called a subframe number), a slot number (or slot index), and the like.
- TTI means an interval at which data can be scheduled. For example, in the current LTE / LTE-A system, a transmission opportunity of a UL grant or a DL grant exists every 1 ms, and there are no multiple UL / DL grant opportunities within a time shorter than 1 ms. Therefore, the TTI is 1ms in the existing LTE / LTE-A system.
- NR new radio access technology
- a slot structure in which a control channel and a data channel are time division multiplexed (TDM) is considered in the fifth generation new RAT.
- the hatched region indicates a transmission region of a DL control channel (eg, PDCCH) carrying DCI
- a black part shows a transmission region of an UL control channel (eg, PUCCH) carrying UCI.
- DCI is control information delivered to the UE by the gNB
- the DCI is UL specific information such as information on cell configuration that the UE needs to know, DL specific information such as DL scheduling, and UL grant. Information and the like.
- the UCI is control information delivered from the UE to the gNB, and the UCI may include a HARQ ACK / NACK report on DL data, a CSI report on a DL channel state, and a scheduling request (SR).
- SR scheduling request
- the symbol regions from symbol index 1 to symbol index 12 may be used for transmission of a physical channel (eg, PDSCH) that carries downlink data, and may be used for transmission of a physical channel (eg, PUSCH) that carries uplink data.
- a physical channel eg, PDSCH
- PUSCH physical channel
- DL transmission and UL transmission are sequentially performed in one slot, and transmission / reception of DL data and reception / transmission of UL ACK / NACK for the DL data are performed in the one slot.
- a time gap is required for a gNB and a UE to switch from a transmission mode to a reception mode or a process of switching from a reception mode to a transmission mode.
- some OFDM symbols at the time of switching from DL to UL in the slot structure are configured as a guard period (GP).
- the DL control channel is TDM and the data channel, and the control channel, PDCCH, is spread over the entire system band and transmitted.
- the bandwidth of a system is expected to reach at least 100 MHz, which makes it difficult to spread the control channel over the entire band.
- Monitoring the entire band for downlink control channel reception for the UE to transmit / receive data may impair battery consumption and efficiency of the UE. Therefore, in the present invention, the DL control channel may be transmitted by being localized or distributed in the system band, that is, some frequency bands in the channel band.
- the basic transmission unit is a slot.
- the slot duration consists of 14 symbols with a normal cyclic prefix (CP) or 12 symbols with an extended CP.
- the slot is also scaled with time as a function of the subcarrier spacing used. That is, as the subcarrier spacing increases, the slot length becomes shorter. For example, if the number of symbols per slot is 14, if the number of slots in the frame of 10 ms is 10 for the 15 kHz subcarrier spacing, the number is 20 for the 30 kHz subcarrier spacing and 40 for the 60 kHz subcarrier spacing. The larger the subcarrier spacing, the shorter the OFDM symbol length.
- the number of OFDM symbols in a slot depends on whether it is a normal CP or an extended CP and does not depend on the subcarrier spacing.
- the actual sampling times for subcarrier intervals of 30 kHz, 60 kHz, and 120 kHz are 1 / (2 * 15000 * 2048) seconds, 1 / (4 * 15000 * 2048) seconds, and 1 / (8 * 15000 * 2048) seconds, respectively. Will be.
- the fifth generation mobile communication system which is recently discussed, considers using a high frequency band, that is, a millimeter frequency band of 6 GHz or more, to transmit data while maintaining a high data rate to a large number of users using a wide frequency band.
- 3GPP uses this as the name NR, which is referred to as NR system in the present invention.
- the millimeter frequency band has a frequency characteristic that the signal attenuation with the distance is very rapid due to the use of a frequency band too high. Therefore, NR systems using bands of at least 6 GHz or more narrow beams that solve the problem of reduced coverage due to abrupt propagation attenuation by collecting and transmitting energy in a specific direction rather than omnidirectionally to compensate for abrupt propagation characteristics. narrow beam) transmission scheme.
- narrow beam narrow beam
- the wavelength is shortened to allow the installation of a plurality of antenna elements in the same area.
- a total of 100 antenna elements can be installed in a two-dimension arrangement in 0.5 lambda (wavelength) intervals on a panel of 5 by 5 cm.
- mmW it is considered to use a plurality of antenna elements to increase the beamforming gain to increase coverage or to increase throughput.
- a beamforming scheme in which a base station or a UE transmits the same signal by using a phase difference appropriate to a large number of antennas is mainly considered.
- Such beamforming methods include digital beamforming that creates a phase difference in a digital baseband signal, analog beamforming that uses a time delay (ie, cyclic shift) in a modulated analog signal to create a phase difference, digital beamforming, and an analog beam.
- Having a transceiver unit (TXRU) to enable transmission power and phase adjustment for each antenna element enables independent beamforming for each frequency resource.
- the millimeter frequency band should be used by a large number of antennas to compensate for rapid propagation attenuation, and digital beamforming is equivalent to the number of antennas, so RF components (eg, digital-to-analog converters (DACs), mixers, power Since an amplifier (power amplifier, linear amplifier, etc.) is required, there is a problem in that the cost of a communication device increases in order to implement digital beamforming in the millimeter frequency band. Therefore, when a large number of antennas are required, such as the millimeter frequency band, the use of analog beamforming or hybrid beamforming is considered.
- DACs digital-to-analog converters
- the analog beamforming method maps a plurality of antenna elements to one TXRU and adjusts the beam direction with an analog phase shifter.
- Such an analog beamforming method has a disadvantage in that only one beam direction can be made in the entire band and thus frequency selective beamforming (BF) cannot be performed.
- Hybrid BF is an intermediate form between digital BF and analog BF, with B TXRUs, which is fewer than Q antenna elements.
- B TXRUs which is fewer than Q antenna elements.
- the direction of beams that can be simultaneously transmitted is limited to B or less.
- FIG. 5 shows examples of a connection scheme of a TXRU and an antenna element.
- 5 (a) shows how a TXRU is connected to a sub-array. In this case the antenna element is connected to only one TXRU.
- 5 (b) shows how the TXRU is connected to all antenna elements. In this case the antenna element is connected to all TXRUs.
- W represents a phase vector multiplied by an analog phase shifter. That is, the direction of analog beamforming is determined by W.
- the mapping between the CSI-RS antenna port and the TXRUs may be 1-to-1 or 1-to-multi.
- digital beamforming processes the digital baseband signal to be transmitted or received so that multiple beams can be used to transmit or receive signals simultaneously in multiple directions, while analog beamforming can transmit or receive signals. Since beamforming is performed in a modulated state of the received analog signal, the signal cannot be simultaneously transmitted or received in multiple directions beyond the range covered by one beam.
- a base station communicates with a plurality of users at the same time by using a broadband transmission or a multi-antenna characteristic.
- a base station uses analog or hybrid beamforming and forms an analog beam in one beam direction, due to the characteristics of analog beamforming Only users within the same analog beam direction can communicate.
- the RACH resource allocation and resource utilization scheme of the base station according to the present invention to be described later is proposed to reflect the constraints caused by the analog beamforming or hybrid beamforming characteristics.
- FIG. 6 abstractly illustrates a hybrid beamforming structure in terms of a transceiver unit (TXRU) and a physical antenna.
- TXRU transceiver unit
- analog beamforming refers to an operation in which the RF unit performs precoding (or combining).
- the baseband unit and the RF unit perform precoding (or combining), respectively, which reduces the number of RF chains and the number of D / A (or A / D) converters.
- the hybrid beamforming structure may be represented by N TXRUs and M physical antennas.
- the digital beamforming for the L data layers to be transmitted at the transmitting end can be represented by an N-by-L matrix, and then the converted N digital signals are converted into analog signals via TXRU and then into an M-by-N matrix.
- the expressed analog beamforming is applied.
- the number of digital beams is L
- the number of analog beams is N.
- the base station is designed to change the analog beamforming on a symbol basis, so that a direction for supporting more efficient beamforming for a UE located in a specific area is being considered.
- N TXRUs and M RF antennas are defined as one antenna panel
- the NR system considers to introduce a plurality of antenna panels to which hybrid beamforming independent of each other is applicable.
- the analog beams advantageous for signal reception may be different for each UE, and thus, the base station is applied to at least a synchronization signal, system information, and paging in a specific slot or subframe (SF).
- a beam sweeping operation is considered in which a plurality of analog beams to be changed symbol by symbol so that all UEs have a reception opportunity.
- FIG. 7 is a diagram illustrating a beam sweeping operation for a synchronization signal and system information during downlink transmission.
- a physical resource or a physical channel through which system information of the New RAT system is broadcasted is referred to as a physical broadcast channel (xPBCH).
- xPBCH physical broadcast channel
- analog beams belonging to different antenna panels may be simultaneously transmitted in one symbol, and to measure a channel for each analog beam, as shown in FIG.
- a method of introducing Beam RS (BRS), which is a reference signal (RS) transmitted for a single analog beam has been discussed.
- the BRS may be defined for a plurality of antenna ports, and each antenna port of the BRS may correspond to a single analog beam.
- a synchronization signal or a xPBCH may be transmitted for all the analog beams included in the analog beam group so that any UE can receive them well.
- NR 8 illustrates a cell of a new radio access technology (NR) system.
- NR new radio access technology
- a method in which a plurality of TRPs constitute one cell is discussed, unlike one base station in a conventional wireless communication system such as LTE.
- the cell is configured, even if the TRP serving the UE is changed, seamless communication is possible, and thus, mobility management of the UE is easy.
- PSS / SSS is transmitted omni-direction, whereas signals such as PSS / SSS / PBCH are rotated omg-directionally by the gNB applying mmWave.
- a method of beamforming a beam and transmitting the beam is considered.
- transmitting / receiving a signal while rotating the beam direction is referred to as beam sweeping or beam scanning.
- beam sweeping refers to transmitter side behavior
- beam scanning refers to receiver side behavior, for example, assuming that gNB can have up to N beam directions, PSS / for each of N beam directions, respectively.
- Transmit signals such as SSS / PBCH ie, gNB transmits synchronization signals such as PSS / SSS / PBCH for each direction while sweeping directions that it may have or want to support, or gNB has N beams
- PSS / SSS / PBCH may be transmitted / received for each beam group, where one beam group may include one or more beams.
- a signal such as PSS / SSS / PBCH transmitted in the same direction may be defined as one SS block, and a plurality of SS blocks may exist in one cell.
- SS block division SS block index may be used, for example, when PSS / SSS / PBCH is transmitted in 10 beam directions in one system, PSS / SSS / PBCH in the same direction may constitute one SS block. It can be understood that there are 10 SS blocks in the system, and in the present invention, the beam index may be interpreted as an SS block index.
- the location in which each of the SSBs described in the present invention is disposed means the location of the resource region in which the SSB can be transmitted, and therefore, the location of the SSBs described in the present invention is the location in which As a resource region that can be called, it may be called a candidate SSB.
- the SSBs are defined for the location or resource region of candidate SSBs that can be transmitted, but at the defined locations of the candidate SSBs, the SSBs are not necessarily transmitted.
- SSBs may be transmitted at the positions of the defined candidate SSBs, but in some cases, there may be a candidate SSB location where the SSB is not transmitted. Therefore, in addition to the definition of the position of the candidate SSB, the present invention further describes a method of indicating information on an actual transmitted synchronization signal block (ATSS) that is actually transmitted.
- ATSS transmitted synchronization signal block
- the SS burst proposed in the present invention is a bundle unit of candidate SSB positions, and indicates a set or arrangement of candidate SSBs within a specific time interval or a specific time unit.
- the SS burst may have a specific time interval or a specific time unit different according to the subcarrier spacing. For example, assuming that the number of OFDM symbols included in one symbol is 14, an SS burst of 15 kHz subcarrier interval or 30 kHz subcarrier interval used in a band of 6 GHz or less means a set or arrangement of candidate SSBs included in one slot.
- an SS burst of 120 kHz subcarrier spacing or 240 kHz subcarrier spacing used in a band of 6 GHz or more may mean a collection or arrangement of candidate SSBs included in 0.25 ms.
- the SS burst set may mean a set or arrangement of SS bursts within a unit time of 5 ms by combining the aforementioned SS bursts.
- SSBs are all located within a 5 ms window, regardless of the period of the SS burst set.
- the number of SSBs to be located within 5ms is defined differently according to a frequency range.
- the subcarrier spacing for the SSB may be 15 kHz or 30 kHz in a band of 6 GHz or less, and 120 kHz or 240 kHz in a band of 6 GHz or more. In the present invention, however, it is assumed that only a subcarrier spacing of 15 kHz is used in a band of 3 GHz or less.
- an SS burst set should be configured such that up to 4 or 8 SSBs are placed within 5 ms at a 15 kHz subcarrier interval, and 8 SSBs are placed within 5 ms at a 30 kHz subcarrier interval.
- SS burst set must be configured.
- the SS burst set should be configured such that up to 64 SSBs are arranged at 120 kHz subcarrier spacing and 240 kHz subcarrier spacing.
- the minimum time required to place the maximum number of SSBs in each subcarrier interval varies from 2ms to 4ms. Therefore, it is necessary to configure various SS burst sets within the 5ms window.
- the present invention looks at how to arrange SSBs according to each subcarrier interval within a 5ms window.
- an SS burst set may be configured as shown in FIG. 9.
- the SS burst set may be considered such that all four SSBs are arranged within 2 ms.
- the UE in IDLE state only needs to use 2ms for SSB decoding, there is an advantage in terms of power consumption.
- the bitmap may be used to inform the UE of the SSBs actually transmitted. However, if there is no bitmap information, the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission.
- Example 1-2 as shown in FIG. 9 (b), two SSBs are defined as one SS burst unit, and SS burst units are disposed at regular intervals of 1 ms or more. . That is, since two SSBs constitute one SS burst, in Example 1-2, one SS burst becomes one SS burst unit. By configuring such an SS burst set, a certain period in which SSBs are not arranged may be used for uplink transmission, thereby enabling low latency communication using the same. If four or fewer SSBs are used within the 5ms window, the bitmap may be used to inform the UE of the SSBs actually transmitted.
- the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission, or may be alternately arranged for each SS burst unit. For example, when placing two SSBs, one SSB may be placed in the first SS burst unit, and the other SSB may be placed in the second SS burst unit.
- 15 kHz and 30 kHz are used as SSB subcarrier spacing.
- Up to eight SSBs can be placed in the 5ms window in that band. Specifically, up to two SSBs may be arranged in 1 ms at a subcarrier spacing of 15 kHz, and up to two SSBs may be arranged in 0.5 ms at a subcarrier spacing of 30 kHz. Therefore, at least 4 ms is needed for the arrangement of eight SSBs based on the 15 kHz subcarrier spacing, and at least 2 ms is required for the arrangement of eight SSBs based on the 30 kHz subcarrier spacing.
- An embodiment of an SS burst aggregation configuration in a band of 3 GHz or more and 6 GHz or less based on this will be described with reference to FIGS. 10 to 11.
- an SS burst set may be configured such that all four SSBs are arranged within 4 ms.
- the bitmap may be used to inform the UE of the SSBs actually transmitted. However, if there is no bitmap information, the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission.
- Example 2-2 four SSBs are defined as one SS burst unit as shown in FIG. 10 (b), and the SS burst units are arranged at regular intervals of 1 ms or more. . That is, in Example 2-2, since two SSBs constitute one SS burst, two SS bursts are defined as one SS burst unit.
- the SS burst set as described above, a certain period in which SSBs are not arranged can be used for uplink transmission, thereby enabling low latency communication using the SS burst set.
- the bitmap may be used to inform the UE of the SSBs actually transmitted. However, if there is no bitmap information, the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission, or may be alternately arranged for each SS burst unit. For example, when placing three SSBs, one SSB is placed in the first SS burst unit, another SSB is placed in the second SS burst unit, and the other SSB is placed in the first SS burst unit again. Can be.
- an SS burst set may be configured such that all eight SSBs are arranged within 2 ms.
- the bitmap may be used to inform the UE of the SSBs actually transmitted. However, if there is no bitmap information, the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission.
- N SSBs are defined as one SS burst unit, and SS burst units are arranged at regular intervals of 0.5 ms or more. do.
- SS burst set By configuring the SS burst set as described above, a certain period in which SSBs are not arranged can be used for uplink transmission, thereby enabling low latency communication using the SS burst set.
- the bitmap may be used to inform the UE of the SSBs actually transmitted. However, if there is no bitmap information, the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission, or may be alternately arranged for each SS burst unit. For example, when placing three SSBs, one SSB may be placed in the first SS burst unit, another SSB may be placed in the second SS burst unit, and the other SSB may be placed in the third SS burst unit. have.
- 120 kHz and 240 kHz are used as subcarrier spacing of SSB.
- Up to 64 SSBs can be placed in the 5ms window in that band.
- up to two SSBs may be arranged at 0.125 ms, and up to four SSBs may be arranged at 0.125 ms at the 240 kHz subcarrier interval. Therefore, in order to arrange 64 SSBs based on the 120 kHz subcarrier spacing, a minimum of 4 ms is required, and in order to arrange 64 SSBs based on the 240 kHz subcarrier spacing, a minimum of 2 ms is required.
- one SSB is used in units of eight SSBs in consideration of the smooth operation of Ultra Reliable Low Latency Communications (URLLC) and the overhead of a bitmap that informs the ATSS information to the UE. Assume that you configure a burst unit.
- URLLC Ultra Reliable Low Latency Communications
- an SS burst set may be configured such that all 64 SSBs are adjacent to each other.
- 12 (a) shows an SS burst set configuration when the subcarrier spacing is 120 kHz
- the UE in IDLE state needs only 4 ms for 120 kHz and only 2 ms for 240 kHz for SSB decoding, which is advantageous in terms of power consumption.
- the bitmap may be used to inform the UE of the SSB burst unit that is actually transmitted.
- the information on the number of SSBs used for each SS burst unit can be known by the UE performing blind detection or using another method. However, if there is no bitmap information, the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission.
- N SSBs are defined as one SS burst unit, and SS burst units are disposed at regular intervals of 0.125 ms or more.
- FIG. 13 (a) shows an SS burst set configuration when the subcarrier spacing is 120 kHz
- FIG. 13 (b) shows an SS burst set configuration when the subcarrier spacing is 240 kHz.
- SS burst set By configuring the SS burst set as described above, a certain period in which SSBs are not arranged can be used for uplink transmission, thereby enabling low latency communication using the SS burst set.
- the bitmap may be used to inform the UE of the SS burst units actually transmitted.
- the information on the number of SSBs used for each SS burst unit can be known by the UE performing blind detection or using another method.
- the UE may assume that the SSB is arranged and transmitted from the front of candidate SSB transmission positions for SSB transmission, or may be alternately arranged for each SS burst unit. For example, when placing three SSBs, one SSB may be placed in the first SS burst unit, another SSB may be placed in the second SS burst unit, and the other SSB may be placed in the third SS burst unit. have.
- the SSB and the data may be multiplexed and transmitted. That is, the subcarrier spacing of data may be selected from 60 kHz and 120 kHz, and the subcarrier spacing of SSB may be selected from 120 kHz and 240 kHz and multiplexed.
- the subcarrier spacing of the data is 60 kHz and the subcarrier spacing of the SSB is 120 kHz
- the SS burst set is configured as in Example 3-2, the 60 kHz subcarrier spacing as shown in Fig. 14 (a).
- the SSB is disposed from the middle of the slot having a.
- a symbol for downlink control and a symbol for uplink control should be allocated to the front part and the rear part of the slot.
- the SS burst set is configured as shown in FIG. Branches may occur where the control areas at the front and back of the slot cannot be guaranteed. Therefore, the SS burst can be reconfigured as shown in FIG. 14B only when the SS burst is configured such that the control area for data cannot be guaranteed as shown in FIG.
- the SS burst set configuration may be designed for a 60 kHz slot duration.
- the SSB may be designed from the front of the slot having the 60 kHz subcarrier spacing while allocating a duration in which the SSB is not arranged for the uplink communication.
- FIG. 15 (a) shows an SSB subcarrier spacing of 120 kHz, a data subcarrier spacing of 60 kHz
- FIG. 15 (b) shows an SSB subcarrier spacing of 240 kHz and a data subcarrier spacing of 60 kHz.
- FIG. 15 (a) shows an SSB subcarrier spacing of 120 kHz, a data subcarrier spacing of 60 kHz
- FIG. 15 (b) shows an SSB subcarrier spacing of 240 kHz and a data subcarrier spacing of 60 kHz.
- a time / frequency resource grid is formed by using a reference numerology of data.
- the SSB may be the same as reference numerology, may be different, or may be multiplexed with a resource grid configured based on the neurology of the data.
- a system supporting NR may include a symbol for downlink control, a guard period for downlink / uplink switching, and a symbol for uplink control in every slot.
- SSBs may overlap with and map with symbols for downlink control.
- the collision between the SSB and a symbol for controlling data can be avoided according to how to configure the SS burst, which is a bundle unit of SSBs.
- a slot may be composed of 14 OFDM symbols or 7 OFDM symbols.
- the configuration of the SS burst may vary according to the number of symbols in the slot. Accordingly, the base station should allocate 1 bit to the PBCH contents to convey to the UE whether the number of symbols of the current slot is 7 or 14, and the symbol number information per slot of the neighbor cell also includes the PBCH contents. Should be informed via
- the SSB discussed in the NR is composed of a total of four symbols in total, including PSS, SSS, and PBCH, and two SSBs may be included in a slot composed of 14 OFDM symbols, and one slot may be configured in seven OFDM symbols. SSB may be included.
- the subcarrier spacing that the SSB may have is 15 kHz and 30 kHz in a band of 6 GHz or less, and 120 kHz and 240 kHz in a band of 6 GHz or more.
- the subcarrier spacing for the data may be any one of 15 kHz, 30 kHz, 60 kHz and 120 kHz.
- one slot consists of 14 OFDM symbols, one to two symbols for downlink control and two symbols for guard period and uplink control It includes. If one slot consists of seven OFDM symbols, it includes one symbol for downlink control and two symbols for guard period and uplink control.
- Embodiments 4-1 to 4-4 describe a method of arranging an SSB in an SS burst based on the above description. Meanwhile, it is assumed that the SS burst set including the SS bursts described in Embodiments 4-1 to 4-4 is configured as shown in FIG. 17.
- the SSB may be arranged as shown in FIG. 18.
- the SSB having the subcarrier spacing of 15 kHz is arranged so as not to invade the control region even if the subcarrier spacing of the data is 15 kHz or 30 kHz.
- the method of arranging the SSB in the 5ms window can be summarized as follows.
- the first OFDM symbols of candidate SSBs have an index of ⁇ 2, 8 ⁇ + 14 * n.
- n 0, 1
- n 0, 1
- the carrier frequencies are greater than 3 GHz and 6 GHz or less
- n 0, 1, 2, 3.
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes of ⁇ 2, 8 ⁇ + 14 * n.
- n 0, 1.
- carrier frequencies larger than 3 GHz and smaller than or equal to 6 GHz, n 0, 1, 2, 3
- the SSB may be arranged as shown in FIG. 19.
- the SSB having the subcarrier spacing of 30 kHz is arranged so as not to invade the control region even if the subcarrier spacing of the data is 30 kHz or 60 kHz.
- the method of arranging the SSB in the 5ms window can be summarized as follows.
- the first OFDM symbols of candidate SSBs have an index of ⁇ 2, 8 ⁇ + 14 * n.
- n 0, 1
- n 0, 1
- the carrier frequencies are greater than 3 GHz and 6 GHz or less
- n 0, 1, 2, 3.
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes ⁇ 2, 8 ⁇ + 14 * n.
- n 0, 1.
- the SSB may be arranged as shown in FIG. 20.
- the SSB having a subcarrier spacing of 15 kHz has a guard period and an uplink control symbol included in slots 1 and 3 of data having a 60 kHz subcarrier spacing and a downlink included in the second and fourth slots. Overlap with the control symbol. Therefore, the first and third slots may be configured as downlink only slots without uplink control symbols.
- the SSB may be arranged as shown in FIG. 21.
- the SSB having a subcarrier spacing of 15 kHz has a guard period included in the first slot of data having a subcarrier spacing of 30 kHz, an uplink control symbol and a downlink included in the second slot. Overlap with link control symbols. Therefore, the first slot may be configured as a downlink only slot without an uplink control symbol.
- Subcarrier spacing of data in the 6 GHz or more band may be 60 kHz or 120 kHz, and the subcarrier spacing of SSB may be 120 kHz or 240 kHz.
- one guard period for downlink / uplink switching and one symbol for uplink control are required in the slot, and one or two symbols for downlink control are required.
- Embodiments 5-1 to 5-3 describe a method of arranging an SSB in an SS burst based on the above description. On the other hand, it is assumed that the SS burst set including the SS burst described in the embodiments 5-1 to 5-3 is configured as shown in FIG.
- the SSB may be arranged as shown in FIG. 23.
- the SSB having the subcarrier spacing of 120 kHz is arranged so as not to invade the control region even if the subcarrier spacing of the data is 60 kHz or 120 kHz.
- the method of arranging the SSB in the 5ms window can be summarized as follows.
- the index of the first OFDM symbols of candidate SSBs has ⁇ 4, 8, 16, 20 ⁇ + 28 * n.
- n 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18.
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes ⁇ 4, 8, 16, 20 ⁇ + 28 * n.
- SSB having a subcarrier spacing of 240 kHz and data having a subcarrier spacing of 60 kHz or 120 kHz may be multiplexed as shown in FIG. 24.
- SSBs having a subcarrier spacing of 240 kHz are arranged so as not to invade the control region of the data.
- the index of the first OFDM symbols of candidate SSBs has ⁇ 8, 12, 16, 20, 32, 36, 40, 44 ⁇ + 56 * n.
- n 0, 1, 2, 3, 5, 6, 7, and 8.
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes ⁇ 8, 12, 16, 20, 32, 36, 40, 44 ⁇ + 56 * n.
- an SS burst set is configured as shown in FIG. 25 and an SS burst is configured as shown in Embodiment 5-1, as shown in FIG. 26, a gap period for uplink control transmission is shown.
- a downlink control symbol may overlap with the SSB.
- the configuration of the SS burst set shown in FIG. 26 is illustrated. You can reconfigure as shown in 27. Further, even when the subcarrier spacing of the SSB is 240 kHz, the subcarrier spacing of FIG. 27 can be arranged corresponding to the position of the SSB having 120 kHz. For example, two SSBs having a subcarrier spacing of 240 kHz may be disposed in a duration corresponding to one SSB having a subcarrier spacing of 120 kHz.
- FIGS. 28 to 29 shows a case where the subcarrier spacing of the SSB is 120 kHz
- FIG. 29 shows a case where the subcarrier spacing of the SSB is 240 kHz.
- the index of the first OFDM symbols of candidate SSBs has ⁇ 4, 8, 16, 20, 32, 36, 44, 48 ⁇ + 70 * n.
- n 0, 2, 4, 6.
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes ⁇ 4, 8, 16, 20, 32, 36, 44, 48 ⁇ + 70 * n.
- carrier frequencies larger than 6 GHz, n 0, 2, 4, 6)
- the index of the first OFDM symbols of candidate SSBs has ⁇ 2, 6, 18, 22, 30, 34, 46, 50 ⁇ + 70 * n.
- n 1, 3, 5, 7.
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes ⁇ 2, 6, 18, 22, 30, 34, 46, 50 ⁇ + 70 * n.
- the index of the first OFDM symbols of candidate SSBs has ⁇ 8, 12, 16, 20, 32, 36, 40, 44, 64, 68, 72, 76, 88, 92, 96, 100 ⁇ + 140 * n.
- n 0 and 2.
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes ⁇ 8, 12, 16, 20, 32, 36, 40, 44, 64, 68, 72, 76, 88, 92, 96, 100 ⁇ + 140 * n.
- n 0, 2
- the index of the first OFDM symbols of candidate SSBs has ⁇ 4, 8, 12, 16, 36, 40, 44, 48, 60, 64, 68, 72, 92, 96, 100, 104 ⁇ + 140 * n.
- the carrier frequency is greater than 6 GHz
- n 1, 3
- the first OFDM symbols of the candidate SS / PBCH blocks have indexes ⁇ 4, 8, 12, 16, 36, 40, 44, 48, 60).
- n 1, 3
- the symbol to which the SSB is transmitted is fixed regardless of the subcarrier spacing. That is, when the subcarrier spacing of the slot is 60 kHz, SSBs can be transmitted in the 3rd to 6th and 9th to 12th symbols, and from the SSB perspective, when the SSB subcarrier spacing is 120 kHz and 240 kHz, the 60 kHz subcarrier spacing is The branch may be transmitted in a symbol that is aligned in time with the symbol position in which the SSB is transmitted in the slot.
- the UE may estimate the positions of the remaining SSBs.
- SSB can be utilized for measurement purposes. If it allows SSB combining within the SS burst, additional combining gain may be obtained.
- SSBs are all located within a 5 ms window, regardless of the period of the SS burst set.
- the number of SSBs to be located within 5ms is defined according to the frequency range.
- up to four SSBs are arranged within 5 ms, and up to eight SSBs are arranged in the band between 3 GHz and 6 GHz. In the 6 GHz and above band, up to 64 SSBs can be placed in a 5ms window.
- the subcarrier spacing that the SSB may have may be 15 kHz and 30 kHz in a band of 6 GHz or less, and 120 kHz and 240 kHz in a band of 6 GHz or more.
- the position where the SSB can be transmitted in the SS burst set (Burst Set) is defined for each subcarrier interval in the standard document.
- ATSS is indicated through RMSI (Remaining minimum system information) or OSI (other system information).
- ATSS information of up to 64 SSBs there is a method of notifying only the number of transmitted SSBs, and a method of notifying information about all locations in a bitmap manner.
- a method of notifying only the number of ATSS it is possible to indicate only up to 6 bits, but the flexibility of the base station SSB transmission is reduced.
- the bitmap scheme provides the base station with full flexibility but requires up to 64 bits.
- the present embodiment describes a method for ATSS indication in a system supporting NR.
- the maximum number of SSBs that can be transmitted in the frequency band of 3 GHz or less is four, and the maximum number of SSBs that can be transmitted in the frequency band of 3 GHz to 6 GHz or less is eight.
- the SSB can be transmitted for each frequency band can be defined as shown in Figure 30 (a). Now, a detailed method of instructing ATSS will be described.
- a method of indicating information about an SSB transmitted in a bitmap That is, since 4 SSBs are transmitted in the band below 3 GHz, 4 bits are used, and 8 bits are used because 8 SSBs are transmitted in the frequency band from 3 GHz to 6 GHz or less. In this case, although the number of bits used is increased as compared with the embodiment 6-1, it may have sufficient flexibility in SSB transmission. That is, since 1 bit is allocated to each SSB index, the base station can select and transmit a desired SSB from SSBs # 0 to 7.
- the maximum number of SSBs is 64, and the location where SSBs can be transmitted in the band of 6GHz or more may be defined as type 1 or type 2 of FIG. 30 (b), as in the band of 6GHz or less.
- 64-bit is required to perform a full flexible transfer as a bitmap.
- the 64-bit number may be a large overhead even if the ATSS instruction is performed using the RMSI / OSI. Accordingly, the ATSS can be indicated in the same manner as in the following Embodiments 6-3 to 6-7, although it is not possible to support full flexibility but provides maximum flexibility with fewer bits. have.
- the transmitted SSBs can be transmitted by dividing each SSB group.
- one SSB group includes eight SSBs as shown in Type 2 of FIG. 30 (b). 6 bits are required for the base station to inform the UE of the number of ATSSs among the 64 SSBs, and the information can be used to determine how many SSBs are actually transmitted to each SSB group. The formula for calculating this is shown in Equation 1 below.
- the information related to the SSB group transmission may be indicated by a bitmap, and the SSB number information transmitted in the SSB group may be indicated by other bits to indicate ATSS.
- 64 total SSBs may be divided into 8 SSB groups, and an 8-bit bitmap may be transmitted to inform the UE of the SSB group used for ATSS transmission.
- an 8-bit bitmap may be transmitted to inform the UE of the SSB group used for ATSS transmission.
- Type2 of FIG. 30 (b) when multiplexing slots having a subcarrier spacing of 60 kHz and SSB, there is an advantage in that the boundary between the SSB group and slots having a subcarrier spacing of 60 kHz is aligned. Accordingly, if the bitmap indicates whether the SSB group is used or not, the UE may know whether the SSB is transmitted in slot units for all subcarrier intervals in the frequency band of 6 GHz or more.
- the ATSS indication requires additional information to know which SSB is transmitted among the eight SSBs in each SSB group. Therefore, a method of informing information about how many SSBs of eight SSBs included in the SSB group is used using an additional bit may be used. At this time, 3 bits are required to inform the actual number information used among the 8 SSBs included in one group, and the information should be equally applied to all SSB groups.
- both SSB Group # 0 and SSB Group # 1 are 3 Will include SSBs, resulting in a total of 6 ATSSs.
- the SSBs are sequentially arranged from the position of the candidate SSB located at the foremost.
- Information related to SSB group transmission may be indicated by a bitmap, and information on the number of SSBs transmitted in the SSB group may be indicated by other bits to indicate ATSS.
- a total of 64 SSBs may be divided into 8 SSB groups, and information about the SSB group used for ATSS transmission may be informed to the UE through 8-bit bitmap transmission.
- Type2 of FIG. 30 (b) when multiplexing slots having a subcarrier spacing of 60 kHz and SSB, there is an advantage in that the boundary between the SSB group and slots having a subcarrier spacing of 60 kHz is aligned. Accordingly, if the bitmap indicates whether the SSB group is used or not, the UE may know whether the SSB is transmitted in slot units for all subcarrier intervals in the frequency band of 6 GHz or more.
- the ATSS indication requires additional information to know which SSB of the 8 SSBs in each SSB group is transmitted. Therefore, a method of informing information about how many SSBs of eight SSBs included in the SSB group is used using an additional bit may be used. Six bits are required to inform the actual number of used SSBs of 64 SSBs, and the information can be used to know how many ATSSs are transmitted in the SSB group. The formula for calculating this is shown in Equation 2 below.
- Information related to SSB group transmission may be indicated by a bitmap, and whether or not the SSB transmitted in the SSB group is indicated by other bits, thereby indicating ATSS.
- 64 total SSBs may be divided into 8 SSB groups, and an 8-bit bitmap may be transmitted to inform the UE of the SSB group used for ATSS transmission.
- an 8-bit bitmap may be transmitted to inform the UE of the SSB group used for ATSS transmission.
- Type2 of FIG. 30 (b) when multiplexing slots having a subcarrier spacing of 60 kHz and SSB, there is an advantage in that the boundary between the SSB group and slots having a subcarrier spacing of 60 kHz is aligned. Accordingly, if the bitmap indicates whether the SSB group is used or not, the UE may know whether the SSB is transmitted in slot units for all subcarrier intervals in the frequency band of 6 GHz or more.
- the ATSS indication requires additional information to know which SSB is transmitted among the eight SSBs in each SSB group. Accordingly, information on which SSB of the eight SSBs included in the SSB group is transmitted may be informed by a bitmap. In this case, since bitmap information for eight SSBs included in the SSB group needs to be transmitted, eight bits are required, and the information should be equally applied to all SSB groups. For example, if the bitmap for the SSB group indicates that SSB Group # 0 and SSB Group # 1 are used, and the bitmap for the SSB indicates that the first and fifth SSBs in the SSB group are transmitted. The first and fifth SSBs are transmitted in both SSB Group # 0 and SSB Group # 1, resulting in a total of four ATSSs.
- the offset with respect to the SSB position can also be indicated within the 5ms window.
- the UE may assume that there is no ATSS in a duration corresponding to the indicated offset.
- the cells in the cell list delivered to the UE may use the same indication method as in the above-described embodiments 6-1 to 6-7, but the cells that are not in the cell list are detected. A default format for the case may be defined.
- the ATSS information indicated to the UE through the RMSI or the OSI may need to be checked once again through UE-specific RRC signaling.
- the ATSS may be checked once again with a full bitmap.
- the bits usable for the ATSS indication may use the remaining bits except 8 bits for indicating the SSB group. That is, referring to FIG. 31, "Bit for actual transmit SSB indication in SSB Group". The bits included in the part can be used.
- the ATSS indication method may be the same as in the embodiments 7-1 to 7-4.
- the location of the ATSS may be defined in the form of a pattern.
- the K bits may be used to indicate at least one pattern among a maximum of 2 K patterns. If indicated, the UE may assume that ATSS is transmitted in the form of a corresponding pattern.
- the SSB group used for ATSS among the SSB groups can be indicated to the UE.
- the UE operates assuming that all eight SSBs that can be included in the indicated SSB group are all ATSS.
- the SSB which is ATSS among the first K SSBs may be indicated to the UE.
- the UE operates on the assumption that K ATSS information indicated by the corresponding scheme is repeatedly transmitted within a 5ms window by using a pattern.
- the K bit may be used to indicate the period of the ATSS and the total number of ATSSs transmitted. Of the K bits, some bits are used to indicate the period of ATSS, and the remaining bits are used to indicate the number of ATSS. Accordingly, the UE may acquire the location information of the ATSS through the period (Periodicity) and the number information of the ATSS.
- an offset with respect to the SSB position may also be indicated within the 5ms window.
- the UE may assume that there is no ATSS in a duration corresponding to the indicated offset.
- the communication device 3300 includes a processor 3310, a memory 3320, an RF module 3330, a display module 3340, and a user interface module 3350.
- the communication device 3300 is shown for convenience of description and some modules may be omitted. In addition, the communication device 3300 may further include necessary modules. In addition, some modules in the communication device 3300 may be classified into more granular modules.
- the processor 3310 is configured to perform an operation according to the embodiment of the present invention illustrated with reference to the drawings. In detail, the detailed operation of the processor 3310 may refer to the contents described with reference to FIGS. 1 to 31.
- the memory 3320 is connected to the processor 3310 and stores an operating system, an application, program code, data, and the like.
- the RF module 3330 is connected to the processor 3310 and performs a function of converting a baseband signal into a radio signal or converting a radio signal into a baseband signal. For this purpose, the RF module 3330 performs analog conversion, amplification, filtering and frequency up conversion, or a reverse process thereof. Meanwhile, in the present invention, the RF module 3330 may be referred to as a transceiver.
- the display module 3340 is connected to the processor 3310 and displays various information.
- the display module 3340 may use well-known elements such as, but not limited to, a liquid crystal display (LCD), a light emitting diode (LED), and an organic light emitting diode (OLED).
- the user interface module 3350 is connected to the processor 3310 and may be configured with a combination of well-known user interfaces such as a keypad and a touch screen.
- each component or feature is to be considered optional unless stated otherwise.
- Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.
- Certain operations described in this document as being performed by a base station may in some cases be performed by an upper node thereof. That is, it is obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
- a base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like.
- Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
- the software code may be stored in a memory unit and driven by a processor.
- the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
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Abstract
Description
Claims (13)
- 무선 통신 시스템에서, 단말이 동기 신호 블록을 수신하는 방법에 있어서,복수의 심볼에 맵핑된 적어도 하나의 동기 신호 블록을 수신하는 것을 포함하되,상기 복수의 심볼을 포함하는 특정 시간 구간에서,상기 적어도 하나의 동기 신호 블록이 수신될 수 있는 후보 동기 신호 블록들을 위한 2개의 영역이 할당되고,상기 특정 시간 구간 내에서,상기 2개의 영역 사이의 시간과, 상기 2개의 영역 앞의 시간 및 상기 2개의 영역 뒤의 시간은 동일한,동기 신호 블록 수신 방법.
- 제 1 항에 있어서,상기 2개의 영역 각각에는,상기 후보 동기 신호 블록들이 제 1 개수만큼 연속적으로 배치되는,동기 신호 블록 수신 방법.
- 제 1 항에 있어서,상기 동기 신호 블록의 부반송파 간격이 제 1 값인 경우,상기 동일한 시간 내에는, 4개의 심볼이 포함되고,상기 동기 신호 블록의 부반송파 간격이 제 2 값인 경우,상기 동일한 시간 내에는, 8개의 심볼이 포함되는,동기 신호 블록 수신 방법.
- 제 1 항에 있어서,상기 후보 동기 신호 블록들을 위한 영역은,하프 프레임 내에서, 상기 특정 시간 구간 단위로 제 2 개수만큼 연속적으로 배치된 후, 일정 시간 이후에 다시 제 2 개수만큼 연속적으로 배치되는,동기 신호 블록 수신 방법.
- 제 4 항에 있어서,상기 동기 신호 블록의 부반송파 간격이 제 1 값인 경우,상기 후보 동기 신호 블록들을 위한 영역은,상기 특정 시간 구간 단위로 제 2 개수만큼 연속적으로 배치되되,상기 일정 시간의 간격으로 4번 반복하여 배치되는,동기 신호 블록 수신 방법.
- 제 5 항에 있어서,상기 동기 신호 블록의 부반송파 간격이 상기 제 1 값인 경우,상기 일정 시간 내에 포함되는 슬롯들의 수는 2이고,상기 동기 신호 블록의 부반송파 간격이 제 2 값인 경우,상기 일정 시간 내에 포함되는 슬롯들의 수는 4인,동기 신호 블록 수신 방법.
- 제 1 항에 있어서,상기 단말이 동작하는 주파수 대역은 특정 값 이상인,동기 신호 블록 수신 방법.
- 제 1 항에 있어서,상기 동일한 시간은, 2개의 심볼로 구성되는,동기 신호 블록 수신 방법.
- 제 1 항에 있어서,상기 2개의 영역이 할당된 특정 시간 구간은,하프 프레임 내에서, 상기 단말이 동작하는 주파수 대역을 기반으로 결정된 특정 개수만큼 국부적(localized)으로 반복하여 배치되는,동기 신호 블록 수신 방법.
- 제 9 항에 있어서,상기 단말이 동작하는 주파수 대역이 특정 값 이하인 경우,상기 특정 개수는 2이고,상기 단말이 동작하는 주파수 대역이 특정 값 이상인 경우,상기 특정 개수는 4인,동기 신호 블록 수신 방법.
- 무선 통신 시스템에서, 동기 신호 블록을 수신하는 단말에 있어서,기지국과 신호를 송수신하는 트랜시버; 및상기 트랜시버와 연결되어, 복수의 심볼에 맵핑된 적어도 하나의 동기 신호 블록을 수신하도록 제어하는 프로세서를 포함하되,상기 복수의 심볼을 포함하는 특정 시간 구간에서,상기 적어도 하나의 동기 신호 블록이 수신될 수 있는 후보 동기 신호 블록들을 위한 2개의 영역이 할당되고,상기 특정 시간 구간 내에서,상기 2개의 영역 사이의 시간과, 상기 2개의 영역 앞의 시간 및 상기 2개의 영역 뒤의 시간은 동일한,단말.
- 무선 통신 시스템에서, 기지국이 동기 신호 블록을 전송하는 방법에 있어서,복수의 심볼에 맵핑된 적어도 하나의 동기 신호 블록을 전송하는 것을 포함하되,상기 복수의 심볼을 포함하는 특정 시간 구간에서,상기 적어도 하나의 동기 신호 블록이 수신될 수 있는 후보 동기 신호 블록들을 위한 2개의 영역이 할당되고,상기 특정 시간 구간 내에서,상기 2개의 영역 사이의 시간과, 상기 2개의 영역 앞의 시간 및 상기 2개의 영역 뒤의 시간은 동일한,동기 신호 블록 전송 방법.
- 무선 통신 시스템에서, 동기 신호 블록을 전송하는 기지국에 있어서,단말과 신호를 송수신하는 트랜시버; 및상기 트랜시버와 연결되어, 복수의 심볼에 맵핑된 적어도 하나의 동기 신호 블록을 전송하도록 제어하는 프로세서를 포함하되,상기 복수의 심볼을 포함하는 특정 시간 구간에서,상기 적어도 하나의 동기 신호 블록이 수신될 수 있는 후보 동기 신호 블록들을 위한 2개의 영역이 할당되고,상기 특정 시간 구간 내에서,상기 2개의 영역 사이의 시간과, 상기 2개의 영역 앞의 시간 및 상기 2개의 영역 뒤의 시간은 동일한,기지국.
Priority Applications (16)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP18816826.4A EP3641417A4 (en) | 2017-06-15 | 2018-06-07 | METHOD OF SENDING AND RECEIVING A SYNCHRONIZATION SIGNAL BLOCK AND DEVICE FOR THEREFORE |
| AU2018283571A AU2018283571B2 (en) | 2017-06-15 | 2018-06-07 | Method for transmitting and receiving synchronization signal block and device therefor |
| MYPI2019000340A MY196662A (en) | 2017-06-15 | 2018-06-07 | Method for Transmitting and Receiving Synchronization Signal Block and Device Therefor |
| MX2019000573A MX2019000573A (es) | 2017-06-15 | 2018-06-07 | Metodo para transmitir y recibir bloques de señales de sincronizacion, y aparato para este. |
| SG11201900100WA SG11201900100WA (en) | 2017-06-15 | 2018-06-07 | Method for transmitting and receiving synchronization signal block and device therefor |
| RU2019100540A RU2731360C1 (ru) | 2017-06-15 | 2018-06-07 | Способ передачи и приема блока сигнала синхронизации и устройство для него |
| US16/065,737 US10638437B2 (en) | 2017-06-15 | 2018-06-07 | Method and apparatus for transmitting and receiving synchronization signal block |
| CN201880028285.6A CN110574447B (zh) | 2017-06-15 | 2018-06-07 | 用于发送和接收同步信号块的方法及其设备 |
| CA3029821A CA3029821C (en) | 2017-06-15 | 2018-06-07 | Method for transmitting and receiving synchronization signal block and apparatus therefor |
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| WO2020235133A1 (ja) * | 2019-05-17 | 2020-11-26 | 株式会社Nttドコモ | 端末 |
| US12199901B2 (en) | 2019-05-17 | 2025-01-14 | Ntt Docomo, Inc. | Terminal capable of handling high frequency band |
| CN111294877A (zh) * | 2019-05-31 | 2020-06-16 | 展讯通信(上海)有限公司 | 网络筛选方法及用户终端、可读存储介质 |
| CN111294877B (zh) * | 2019-05-31 | 2022-04-08 | 展讯通信(上海)有限公司 | 网络筛选方法及用户终端、可读存储介质 |
| CN114303398A (zh) * | 2019-08-15 | 2022-04-08 | Lg电子株式会社 | 在nr v2x中发送s-ssb的方法和设备 |
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| US10638437B2 (en) | 2020-04-28 |
| KR20180136917A (ko) | 2018-12-26 |
| EP3641417A1 (en) | 2020-04-22 |
| US10750461B2 (en) | 2020-08-18 |
| CL2019000094A1 (es) | 2019-04-12 |
| PH12019500078A1 (en) | 2019-07-29 |
| CA3029821C (en) | 2023-08-08 |
| MX2019000573A (es) | 2019-07-04 |
| MY196662A (en) | 2023-04-28 |
| AU2018283571A1 (en) | 2019-01-24 |
| US20200029287A1 (en) | 2020-01-23 |
| SG11201900100WA (en) | 2019-02-27 |
| US10687292B2 (en) | 2020-06-16 |
| US20200053671A1 (en) | 2020-02-13 |
| US10470144B2 (en) | 2019-11-05 |
| JP2019525596A (ja) | 2019-09-05 |
| US20200145943A1 (en) | 2020-05-07 |
| JP6728470B2 (ja) | 2020-07-22 |
| CA3029821A1 (en) | 2018-12-20 |
| KR102138535B1 (ko) | 2020-07-28 |
| BR112019000576A2 (pt) | 2020-01-21 |
| RU2731360C1 (ru) | 2020-09-02 |
| CN110574447A (zh) | 2019-12-13 |
| EP3641417A4 (en) | 2021-02-17 |
| US20190215790A1 (en) | 2019-07-11 |
| CN110574447B (zh) | 2022-04-01 |
| US11457420B2 (en) | 2022-09-27 |
| US20200351805A1 (en) | 2020-11-05 |
| KR101915997B1 (ko) | 2018-11-07 |
| AU2018283571B2 (en) | 2020-07-09 |
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