Method and device for transmitting and receiving signal in wireless communication system

Abstract

A method and device for transmitting and receiving a signal in a wireless communication system, disclosed in the present specification, may configure, through configuration of one or more Scells, parameters related to SSB transmission in corresponding Scells when an SSB is transmitted and received between a base station and a terminal.

Description

Method and device for transmitting and receiving signals in a wireless communication system

[0001] The present invention relates to a method and apparatus used in a wireless communication system.

[0002] Wireless communication systems are widely deployed to provide various types of communication services, such as voice and data. Typically, wireless communication systems are multiple access systems that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power). Examples of multiple access systems include Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA).

[0003] The technical problem to be achieved by the present invention is to provide a method for efficiently transmitting and receiving wireless communication signals and a device therefor.

[0004] The technical problems of the present invention are not limited to the technical problems described above, and other technical problems can be inferred from the embodiments of the present invention.

[0005] The present invention provides a method and device for transmitting and receiving signals in a wireless communication system.

[0006] As one aspect of the present invention, a method performed by a terminal in a wireless communication system is provided, comprising: receiving a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for an SSB (synchronization signal / physical broadcast channel block) in the first S cell; receiving a single message for indicating at least one of the first parameters; and receiving an SSB in the first S cell based on a parameter indicated by the single message among the first parameters.

[0007] As another aspect of the present invention, a device for performing the above method is provided, comprising a terminal, a processor, and a storage medium.

[0008] In another aspect of the present invention, a method performed by a base station in a wireless communication system is provided, comprising: transmitting a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for an SSB (synchronization signal / physical broadcast channel block) in the first S cell; transmitting a single message for indicating at least one of the first parameters; and transmitting an SSB in the first S cell based on a parameter indicated by the single message among the first parameters.

[0009] As another aspect of the present invention, a device for performing the method is provided, comprising a base station, a processor, and a storage medium.

[0010] The above devices may include at least a terminal, a network, and an autonomous vehicle capable of communicating with other autonomous vehicles other than the above devices.

[0011] The above-described aspects of the present invention are only some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be derived and understood by a person having ordinary skill in the art based on the detailed description of the present invention described below.

[0012] According to one embodiment of the present invention, when a signal is transmitted and received between communication devices, there is an advantage in that more efficient signal transmission and reception can be performed through operations differentiated from those of the prior art.

[0013] The technical effects of the present invention are not limited to the technical effects described above, and other technical effects can be inferred from the embodiments of the present invention.

[0014] Figure 1 illustrates the structure of a radio frame.

[0015] Figure 2 illustrates a resource grid of slots.

[0016] Figure 3 illustrates the SSB structure.

[0017] FIG. 4 is a drawing for explaining a signal transmission and reception method according to an embodiment of the present invention.

[0018] Figures 5 to 8 illustrate devices according to embodiments of the present invention.

[0019] The following technologies can be used in various wireless access systems, such as CDMA, FDMA, TDMA, OFDMA, and SC-FDMA. CDMA can be implemented using wireless technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented using wireless technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented using wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is a part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is a part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0020] For clarity, the description is based on a 3GPP communication system (e.g., LTE, NR), but the technical idea of ​​the present invention is not limited thereto. LTE refers to technology after 3GPP TS 36.xxx Release 8. Specifically, LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR may be referred to as a 3GPP system. "xxx" refers to a standard document detail number. LTE / NR may be collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present invention, reference may be made to matters described in standard documents published prior to the present invention. For example, reference may be made to the following documents.

[0021] 3GPP NR

[0022] - 38.211: Physical channels and modulation

[0023] - 38.212: Multiplexing and channel coding

[0024] - 38.213: Physical layer procedures for control

[0025] - 38.214: Physical layer procedures for data

[0026] - 38.300: NR and NG-RAN Overall Description

[0027] - 38.331: Radio Resource Control (RRC) protocol specification

[0028] Figure 1 illustrates the structure of a radio frame used in NR.

[0029] In NR, uplink (UL) and downlink (DL) transmissions are structured as frames. A radio frame is 10ms long and is defined as two 5ms half-frames (HF). Each half-frame is defined as five 1ms subframes (SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols, depending on the cyclic prefix (CP). When normal CP is used, each slot contains 14 symbols. When extended CP is used, each slot contains 12 symbols. Here, the symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or DFT-s-OFDM symbols).

[0030] Table 1 illustrates that when CP is normally used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0031] [Table 1]

[0032]

[0033] Table 2 illustrates that when extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0034] [Table 2]

[0035]

[0036] In an NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be set differently between multiple cells that are merged into a single user equipment (UE). Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as a TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells.

[0037] NR supports multiple Orthogonal Frequency Division Multiplexing (OFDM) numerologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, while a 30 kHz / 60 kHz SCS can support dense urban areas, lower latency, and wider carrier bandwidth.

[0038] The NR frequency band is defined by two types of frequency ranges (FR) (FR1 / FR2). FR1 / FR2 can be configured as shown in Table 3 below. FR2 can also refer to millimeter wave (mmW).

[0039] [Table 3]

[0040]

[0041] Figure 2 illustrates the slot structure of an NR frame.

[0042] A slot contains multiple symbols in the time domain. For example, for a normal CP, one slot contains 14 symbols, and for an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RB interlaces (simply, interlaces) can be defined in the frequency domain. An interlace m ∈ {0, 1, ..., M-1} can be composed of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interlaces. A BWP (Bandwidth Part) is defined as multiple consecutive RBs (e.g., physical RBs, PRBs) in the frequency domain, and can correspond to one OFDM numerology (e.g., SCS(u), CP length, etc.). A carrier can contain up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal within a single cell / carrier. Each element in the resource grid is referred to as a Resource Element (RE), to which a single modulation symbol can be mapped.

[0043] In a wireless communication system, a terminal receives information from a base station via the downlink (DL), and the terminal transmits information to the base station via the uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information they transmit and receive. A physical channel corresponds to a set of resource elements (REs) that carry information derived from a higher layer. A physical signal corresponds to a set of resource elements (REs) used by the physical layer (PHY), but does not carry information derived from a higher layer. The higher layers include the Medium Access Control (MAC) layer, the Radio Link Control (RLC) layer, the Packet Data Convergence Protocol (PDCP) layer, and the Radio Resource Control (RRC) layer.

[0044] DL physical channels include Physical Broadcast Channel (PBCH), Physical Downlink Shared Channel (PDSCH), and Physical Downlink Control Channel (PDCCH). DL physical signals include DL Reference Signal (RS), Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS). DL RS includes Demodulation RS (DM-RS), Phase-tracking RS (PT-RS), and Channel-state information RS (CSI-RS). UL physical channels include Physical Random Access Channel (PRACH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH). UL physical signals include UL RS. UL RS includes DM-RS, PT-RS, and Sounding RS (SRS).

[0045] In the present invention, the base station may be, for example, a gNodeB.

[0046] Figure 3 illustrates the SSB structure. Based on SSB, a terminal can perform cell search, system information acquisition, beam alignment for initial access, and DL measurements. SSB is used interchangeably with the SS / PBCH (Synchronization Signal / Physical Broadcast channel) block.

[0047] Referring to Figure 3, SSB is composed of PSS, SSS, and PBCH. SSB is composed of four consecutive OFDM symbols, and PSS, PBCH, SSS / PBCH, and PBCH are transmitted for each OFDM symbol. PSS and SSS are each composed of one OFDM symbol and 127 subcarriers, and PBCH is composed of three OFDM symbols and 576 subcarriers. Polar coding and QPSK (Quadrature Phase Shift Keying) are applied to PBCH. PBCH is composed of data RE and DMRS (Demodulation Reference Signal) RE for each OFDM symbol. There are three DMRS REs for each RB, and three data REs exist between DMRS REs.

[0048] NES (Network energy saving)

[0049] The contents discussed above can be applied in combination with the methods proposed in the present invention described below, or can be supplemented to clarify the technical features of the methods proposed in the present invention.

[0050] In addition, the methods described below can be equally applied to the NR system (licensed band) or shared spectrum described above, and the technical ideas proposed in this specification can be modified or replaced to fit the terms, expressions, structures, etc. defined in each system so that they can be implemented in the corresponding systems.

[0051] As higher data rates are demanded, base stations must be equipped with more antennas and provide services across wider bandwidths and frequency bands. Recent studies indicate that base station energy costs can reach as high as 20% of total operational expenditure (OPEX). To build eco-friendly networks by reducing carbon emissions and lowering operating expenses (OPEX) for telecommunications operators, energy conservation at base stations is a key consideration in wireless communication systems, including 3GPP.

[0052] This increased interest in base station energy savings led to the approval of a new study item in 3GPP NR release 18 called “study on network energy savings”, and the technologies specified in subsequent work items included SSB-less S-Cell operation for inter-band CA of FR1 and co-located cells, improvements to the Cell DTX / DRX mechanism including alignment of Cell DTX / DRX and UE DRX in RRC_CONNECTED mode, and inter-node information exchange of Cell DTX / DRX. It also includes spatial domain and power domain techniques that enable efficient adaptation of spatial elements, efficient adaptation of power values ​​between PDSCH and CSI-RS, mechanisms to prevent camping of legacy UEs in cells adopting Rel-18 NES technology, improvements to CHO procedures, inter-node beam activation and improvements to limit paging in limited areas, and corresponding RRM / RF core requirements.

[0053] Meanwhile, there are other technologies that have been identified as useful through research but are not yet specified in Rel-18. Rel-19 WI aims to adopt additional technologies that can achieve network energy savings, targeting beneficial techniques studied but not yet adopted in Rel-18, such as on-demand SSB and on-demand SIB1 transmission, and adaptation of common signaling / channel transmission.

[0054] This specification proposes a method for a base station to control SSB transmission in a multi-cell scenario and a method for a terminal to request SSB transmission control.

[0055] [Method #1] A method in which a terminal receives, from a base station, RRC signaling for S (secondary) cell configuration / addition or S cell activation MAC-CE (medium access control-control element), along with whether to transmit SSB per S cell and SSB transmission-related parameters (e.g., SSB burst cycle), and a method in which a terminal receives instructions for adjusting the transmission cycle.

[0056] For a terminal capable of carrier aggregation (CA), S-cell(s) can be configured from a base station via RRC signaling. When S-cell(s) are configured / added, the corresponding S-cell(s) are initially in a deactivated state. In order to receive PDCCH / PDSCH in the S-cell(s), the S-cell(s) must be activated via MAC-CE. When the terminal receives S-cell configuration (addition / modification / release) or receives S-cell activation instruction via MAC-CE, the terminal can receive information on whether SSB transmission is enabled for each S-cell and parameters related to SSB transmission. At this time, information on whether SSB transmission is enabled may include information such as whether the S-cell is SSB-less or whether the S-cell operates on-demand SSB. SSB transmission-related parameters may include information on the period of SSB burst / SSB index / SSB index group, information on SSB transmission control request resources of the terminal, etc.

[0057] For example, through the S-cell configuration, the terminal can receive an SSB index group configured by grouping multiple SSB indices in advance for each S-cell, and can receive different cycles / patterns configured for each SSB burst or SSB index or SSB index group. The terminal can receive one or more cycle / pattern candidates configured for each SSB index or SSB index group, and can dynamically receive an indication from the base station of one of the cycle / pattern candidates configured in advance for each SSB index or SSB index group of a specific S-cell through a (group) bitmap in GC-DCI or MAC-CE depending on the situation within the cell. The MO (monitoring occasion) of GC-DCI or MAC-CE for controlling the cycle / pattern of the SSB index or SSB index group can be set to N times the SSB cycle or 5ms (N is a natural number greater than 1).

[0058] For example, two SSB index groups #0 / #1 can be set within an SSB burst of a specific Scell ​​#1. If four period candidates are set, such as {80ms, 160ms, 320ms, 640ms}, the period of SSB index group #0 / #1 can be indicated through a field / bit (group) in a (pre-set) bitmap corresponding to the Scell ​​in GC-DCI. Of the four bits of the bitmap, the MSB 2 bits can dynamically indicate the period of SSB index group #0, and the remaining LSB 2 bits can dynamically indicate the period of SSB index group #1. The following bits / fields of the bitmap are pre-set with other Scells set to the terminal, so that period adjustment per SSB index / SSB index group for multiple cells can be indicated at once.

[0059] When a terminal receives SSB transmission-related parameters from a base station for a specific cell (e.g., a P-cell), the terminal may be configured to apply the same SSB transmission-related parameters to other cell(s) (e.g., S-cells) configured for the terminal. Alternatively, the terminal may be individually configured with different SSB transmission-related parameters for each S-cell or each S-cell group. For example, N-bit fields / bitmaps corresponding to each S-cell or each S-cell group configured for the terminal may be included in the GC-DCI, and the index of one of the cycle candidates of a pre-arranged SSB burst may be indicated for each S-cell or each S-cell group through the N-bit fields / bitmaps.

[0060] Meanwhile, the terminal may receive instructions from the base station to adapt SSB transmission-related parameters of a specific cell or cell group through GC (group-common)-DCI or MAC-CE. In this case, an adjustment instruction for SSB transmission-related parameters of a specific cell or multiple cell groups may be received through one (GC-)DCI or MAC-CE.

[0061] The UE may receive an instruction to adjust SSB transmission related parameters of a non-anchor cell(s), e.g., an Scell / Scell ​​group, via the SSB of an anchor cell (e.g., a Pcell) or SIB1. For example, the UE may receive an instruction to change the SSB period of all or specific Scells configured for the UE from 20 ms to 40 ms via a specific PSS / SSS sequence, DMRS sequence, specific field / bit of the PBCH, and / or specific field / bit in the SIB1 PDCCH / PDSCH.

[0062] [Method #2] When one or more non-anchor cells (e.g., S-cells) associated with an anchor cell (e.g., P-cell) are set for a terminal, a method for requesting adjustment of SSB transmission (period of SSB burst / SSB index / SSB index group) and a method for receiving a response to the request and an adjusted SSB

[0063] A terminal can receive in advance, from an anchor cell (e.g., a P-cell) or a non-anchor cell (e.g., an S-cell), resources for requesting SSB transmission control, information about a cell to transmit the transmission control request, information about a UL signal / channel, and information about a cell to receive a response to the transmission control request. Here, the resources for the SSB transmission control request may mean resources for transmitting specific UL signals / channels, such as messages within a RACH procedure, such as Message 1 / Message 3 / Message A, RO / RAPID, (SR) PUCCH, CG-PUSCH, P / SP-PUCCH / PUSCH, etc. The UL signals / channels may mean messages within a RACH procedure, such as Message 1 / Message 3 / Message A, RO / RAPID, (SR) PUCCH, CG-PUSCH, P / SP-PUCCH / PUSCH, etc.

[0064] Additionally, if the terminal is configured with an anchor cell and one or more non-anchor cells, the terminal can be configured in advance to which cell the transmission control request will be transmitted. Based on this configuration, the terminal can determine to which cell the resources and UL signals / channels for the aforementioned SSB transmission control request will be transmitted. For example, a terminal connected to S-Cell #1 can be configured to transmit a RAPID=50 PRACH previously configured for SSB transmission control by S-Cell #1, or it can be configured to transmit the corresponding PRACH to a P-Cell.

[0065] The UE can separately configure UL resources for each cell requesting SSB modulation. Alternatively, the UE can separately configure UL resources for each cell group. The UE can inform the base station of which cell / cell group the SSB modulation request is for, based on the UL resources. Furthermore, the UE can first notify the base station of the need for SSB transmission modulation using a signal such as PRACH, and then transmit information on how the SSB is specifically modulated by including it in a subsequent UL channel / signal. For example, the UE can request the SSB index (group) of a specific non-anchor cell through message 1 configured for SSB transmission modulation request, and can also request a specific period value through message 3.

[0066] After the terminal transmits a request for SSB transmission adjustment, the terminal receives a response from the base station indicating whether the request has been properly received and information about SSB transmission adjustment, and can receive the adjusted SSB. At this time, RAR (Message 2) / Message 4 / Message B, ACK, and GC-DCI or MAC-CE can be used for the base station's response to the SSB transmission adjustment request. The cell in which the response will be received can also be configured in advance. In this base station response message, the terminal can be directly instructed on how the SSB transmission will be adjusted, for example, which of several pre-arranged SSB burst period candidates will be changed and when the changed SSB transmission will be transmitted, or the terminal can expect to receive the changed SSB from a pre-arranged / configured time.

[0067] Meanwhile, when a terminal receives a UL signal / channel configuration to request SSB transmission adjustment, it may receive different UL signals / channels for each cell and request the SSB transmission cycle of a specific cell. The terminal may also receive different SSB transmission adjustment parameters and associated configurations for each UL signal / channel in advance and request specific SSB transmission adjustment. In addition, when a terminal connected to a non-anchor cell receives SSB from another cell (e.g., an anchor cell or another non-anchor cell), it may transmit a specific UL signal / channel configured in advance to the anchor cell to request SSB cycle adjustment.

[0068] [Method #3] When the period of an SSB index / SSB index group within an SSB burst can be dynamically adjusted by a base station or terminal request, a method for handling collisions with an SSB index / SSB index group in PDCCH / PDSCH reception and PUCCH / PUSCH transmission procedures.

[0069] If the period and transmission status of the SSB index / SSB index group can be dynamically adapted at the request of the base station or terminal through the above method #1 / method #2, etc., modification of the existing SSB transmission / reception operation may be required. In the resource where the SSB index is transmitted within the SSB burst, the terminal does not expect the PDCCH / PDSCH to be scheduled, or does not use it for transmission because it regards it as an invalid resource when transmitting PUCCH / PUSCH. If the base station adjusts the period of a specific SSB index / SSB index group through GC-DCI or MAC-CE (or RAR / Message 4 / Message B), the presence or absence of the SSB index / SSB index group within the SSB burst may change. For example, if SSB index #1 in an SSB burst is set / indicated to be transmitted in a specific symbol resource via ssb-PositionsInBurst, and then the SSB period is doubled via GC-DCI, SSB index #1 of a specific SSB burst (e.g., even SSB burst) may not be transmitted. For example, if SSB index #1 is transmitted in every even SSB burst, the UE can expect reception of SSB index #1 in every even SSB burst, and can expect reception of another DL signal / channel (PDCCH / PDSCH) or scheduling of an UL signal / channel (PUCCH / PUSCH) in the time / frequency resource where SSB index #1 in odd SSB burst was transmitted.

[0070] Alternatively, since it may be burdensome for the terminal to change the PDCCH / PDSCH reception and PUCCH / PUSCH transmission procedures each time the transmission of the SSB index / SSB index group is dynamically adjusted through GC-DCI or MAC-CE, the terminal may perform the transmission and reception procedures assuming the shortest period that can be adjusted or assuming that the most SSBs can be transmitted.

[0071] If the base station can configure a sparse SSB with a relatively long period and an additional SSB with a relatively short period, and can dynamically instruct ON / OFF (activation / deactivation) of the additional SSB through GC-DCI or MAC-CE, a situation may occur where the resources where the actual SSB is transmitted (i.e., SSB occasion) overlap with an RO (RACH occasion) depending on whether the additional SSB is transmitted. In this case, 1) only the SSB index configured / indicated through SIB1 for SSB-to-RO mapping is regarded as a valid RO, or 2) among the ROs determined to be valid ROs by performing SSB-to-RO mapping based on the ssb-PositionsInBurst parameter set through the upper layer, an RO that collides with the additional SSB may be determined to be invalid again. Alternatively, considering all candidates for which SSB can be transmitted (i.e., all pre-configured SSB indices / SSB index group control patterns / cycles) regardless of actual transmission, ROs that conflict with candidates for which SSB can be transmitted can be excluded from valid ROs.

[0072] Meanwhile, the present invention is not limited to the transmission and reception of uplink and / or downlink signals. For example, the present invention can also be used in direct communication between terminals. Furthermore, the base station in the present invention may include not only a base station but also a relay node. For example, the base station operations in the present invention may be performed by the base station, but may also be performed by a relay node.

[0073] It is clear that the examples of the proposed methods described above can also be considered as a type of proposed methods, as they can be included as one of the implementation methods of the present invention. In addition, the proposed methods described above can be implemented independently, but can also be implemented in the form of a combination (or merge) of some of the proposed methods. Information on whether the proposed methods are applicable (or information on the rules of the proposed methods) can be defined by a rule so that the base station notifies the terminal or the transmitting terminal notifies the receiving terminal through a predefined signal (e.g., a physical layer signal or a higher layer signal).

[0074] Implementation example

[0075] Figure 4 is a flowchart of a signal transmission and reception method according to one embodiment of the present invention.

[0076] Referring to FIG. 4, a signal transmission and reception method according to an embodiment of the present invention may be performed by a terminal and may be configured to include a step of receiving a first configuration for a first S-cell (S501), a step of receiving a single message (S503), and a step of receiving an SSB based on a parameter indicated by the single message in the first configuration (S505). A signal transmission and reception method from a base station perspective according to an embodiment of the present invention may be configured to include a step of transmitting a first configuration for a first S-cell (S501), a step of transmitting a single message (S503), and a step of transmitting an SSB based on a parameter indicated by the single message in the first configuration (S505).

[0077] In addition to the operation of FIG. 6, one or more of the operations described through Method #1 to Method #3 may be performed.

[0078] For example, referring to method #1, in a situation where multiple S-cells are CA'd, the configuration for each S-cell may include parameters related to the SSB configuration within the corresponding S-cell. For example, the first configuration includes first parameters for the SSB configuration within the first S-cell, and the second configuration includes second parameters for the SSB configuration within the second S-cell. The configuration for each S-cell includes a parameter for whether SSB is received within the corresponding S-cell (whether SSB is transmitted). In addition, the configuration for each S-cell includes a parameter for a period that can be set for each of multiple SSB bursts, SSB indices, and / or SSB index groups within the corresponding S-cell. In addition, the configuration for each S-cell includes a parameter for a resource for requesting transmission adjustment for SSB within the corresponding S-cell. The terminal may transmit a request for changing the transmission period of SSB from a specific resource based on each parameter.

[0079] A single message of S503 indicates one or more of the first parameters and the second parameters. The single message may be a single MAC-CE or a single DCI. Alternatively, the single message may be received via SSB or SIB. The single message includes first fields for the first configuration and second fields for the second configuration, and the first fields and second fields are distinguished by SSB bursts, SSB indices, and / or SSB index groups. The single message may be received in a P-cell or an anchor cell, and the MO period may be set based on the SSB period within each S-cell.

[0080] In step S505, an SSB may be received in one or more of the first cell and the second cell based on a parameter indicated by a single message among the first parameters and the second parameters.

[0081] In addition to the operations described with respect to FIG. 4, one or more of the operations described through FIGS. 1 to 3 and / or the operations described in Method #2 and Method #3 may be additionally performed in combination.

[0082] Examples of communication systems to which the present invention is applied

[0083] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods and / or operational flowcharts of the present invention disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0084] Hereinafter, more specific examples will be provided with reference to the drawings. In the drawings / descriptions below, the same drawing reference numerals may represent identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise described.

[0085] Figure 5 illustrates a communication system (1) applied to the present invention.

[0086] Referring to FIG. 5, a communication system (1) applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and can be implemented in the form of HMD (Head-Mounted Device), HUD (Head-Up Display) installed in a vehicle, television, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot, etc. Mobile devices can include smartphone, smart pad, wearable device (e.g., smart watch, smart glass), computer (e.g., laptop, etc.), etc. Home appliances can include TV, refrigerator, washing machine, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and a specific wireless device (200a) can act as a base station / network node to other wireless devices.

[0087] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0088] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or, D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present invention.

[0089] Examples of wireless devices to which the present invention is applied

[0090] Figure 6 illustrates a wireless device applicable to the present invention.

[0091] Referring to FIG. 6, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 5.

[0092] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0093] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). Furthermore, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0094] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0095] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0096] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0097] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0098] Examples of wireless devices to which the present invention is applied

[0099] Figure 7 illustrates another example of a wireless device applicable to the present invention. The wireless device may be implemented in various forms depending on the use case / service (see Figure 5).

[0100] Referring to FIG. 7, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 6 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 6. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 6. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0101] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 5, 100a), a vehicle (Fig. 5, 100b-1, 100b-2), an XR device (Fig. 5, 100c), a portable device (Fig. 5, 100d), a home appliance (Fig. 5, 100e), an IoT device (Fig. 5, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 5, 400), a base station (Fig. 5, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0102] In FIG. 7, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of a set of one or more processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0103] Examples of vehicles or autonomous vehicles to which the present invention is applied

[0104] Figure 8 illustrates a vehicle or autonomous vehicle applicable to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned or unmanned aerial vehicle (AV), a ship, or the like.

[0105] Referring to FIG. 8, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 6, respectively.

[0106] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), and servers. The control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations. The control unit (120) can include an ECU (Electronic Control Unit). The drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired / wireless charging circuit, a battery, etc. The sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.

[0107] For example, the communication unit (110) can receive map data, traffic information data, etc. from an external server. The autonomous driving unit (140d) can generate an autonomous driving route and driving plan based on the acquired data. The control unit (120) can control the drive unit (140a) so that the vehicle or autonomous vehicle (100) moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit (110) can irregularly / periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles. In addition, during autonomous driving, the sensor unit (140c) can acquire vehicle status and surrounding environment information. The autonomous driving unit (140d) can update the autonomous driving route and driving plan based on newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0108] It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the scope of the invention. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present invention are intended to be included within the scope of the present invention.

[0109] As described above, the present invention can be applied to various wireless communication systems.

Claims

1. In a method performed by a terminal in a wireless communication system, A step of receiving a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for a SSB (synchronization signal / physical broadcast channel block) within the first S cell; A step of receiving a single message for indicating one or more of the first parameters; and A step of receiving an SSB from the first S cell based on a parameter indicated by the single message among the first parameters; comprising; method.

2. In paragraph 1, A step of receiving a second setting for a second S cell different from the first cell, wherein the second setting includes second parameters for an SSB within the second S cell; A step of receiving SSB in the second cell; further comprising: At least one of the second parameters is indicated by the single message, and the SSB of the second cell is received based on the parameter indicated by the single message. method.

3. In paragraph 1, The above single message is a single MAC-CE (medium access control-control element) or a single DCI (downlink control information). method.

4. In paragraph 1, The above single message is received via the P (primary) cell, method.

5. In paragraph 2, The first setting and the second setting each include a parameter for whether SSB is received within the S cell. method.

6. In paragraph 2, The first setting and the second setting each include parameters for a period that can be set for each of a plurality of SSB index groups within the S cell. method.

7. In paragraph 2, The first setting and the second setting each include parameters for resources for the terminal to request transmission control for SSB within the S cell. method.

8. In paragraph 7, A step of requesting the single message based on parameters for resources for requesting transmission control for SSB within the S cell; further comprising; method.

9. In paragraph 2, The single message includes first fields for the first setting and second fields for the second setting, and the first fields and the second fields are distinguished by the plurality of SSB index groups. method.

10. In paragraph 2, The period of the MO (monitoring occasion) of the above single message is set based on the period of the SSB in the first S cell and the period of the SSB in the second S cell. method.

11. In paragraph 1, The above single message is received via SSB or SIB (system information block). method.

12. In a terminal operating in a wireless communication system, At least one transceiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step of receiving a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for a SSB (synchronization signal / physical broadcast channel block) within the first S cell; A step of receiving a single message for indicating one or more of the first parameters; and A step of receiving an SSB from the first S cell based on a parameter indicated by the single message among the first parameters; comprising; Terminal.

13. In a device for a terminal, at least one processor; and At least one computer memory operably connected to said at least one processor and configured to, when executed, cause said at least one processor to perform operations, said operations comprising: A step of receiving a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for a SSB (synchronization signal / physical broadcast channel block) within the first S cell; A step of receiving a single message for indicating one or more of the first parameters; and A step of receiving an SSB from the first S cell based on a parameter indicated by the single message among the first parameters; comprising; device.

14. A computer-readable non-volatile storage medium comprising at least one computer program that causes a terminal including at least one processor to perform an operation, the operation comprising: A step of receiving a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for a SSB (synchronization signal / physical broadcast channel block) within the first S cell; A step of receiving a single message for indicating one or more of the first parameters; and A step of receiving an SSB from the first S cell based on a parameter indicated by the single message among the first parameters; comprising; Storage media.

15. In a method performed by a base station in a wireless communication system, A step of transmitting a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for a SSB (synchronization signal / physical broadcast channel block) within the first S cell; A step of transmitting a single message for indicating one or more of the first parameters; and A step of transmitting an SSB from the first S cell based on a parameter indicated by the single message among the first parameters; method.

16. In a base station operating in a wireless communication system, At least one transceiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step of transmitting a first configuration for a first S (secondary) cell, wherein the first configuration includes first parameters for a SSB (synchronization signal / physical broadcast channel block) within the first S cell; A step of transmitting a single message for indicating one or more of the first parameters; and A step of transmitting an SSB from the first S cell based on a parameter indicated by the single message among the first parameters; Base station.

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