Methods and apparatus for transmitting and receiving signals in a wireless communication system

Abstract

The method and apparatus for transmitting and receiving signals in a wireless communication system disclosed in this specification can configure parameters related to SSB transmission in a corresponding Scell ​​by configuring one or more Scells when transmitting and receiving SSBs between a base station and a terminal.

Description

Technical Field

[0001] This disclosure relates to a method and apparatus for use in a wireless communication system. Background Technology

[0002] Wireless communication systems are typically being developed to cover a wide range of diverse areas to provide communication services such as audio communication and data communication. Wireless communication is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). For example, multiple access systems can include one of the following: 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). Summary of the Invention

[0003] Technical issues

[0004] The purpose of this disclosure is to provide a signal transmission and reception method and apparatus for efficiently transmitting and receiving reference signals in a wireless communication system.

[0005] Those skilled in the art will understand that the purposes achievable by using this disclosure are not limited to those specifically described above, and that the above and other purposes achievable by this disclosure will become clearer from the following detailed description.

[0006] Technical solution

[0007] This disclosure provides a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0008] In one aspect of this disclosure, a method performed by a user equipment (UE) in a wireless communication system is provided. The method includes the steps of: receiving a first configuration for a first secondary cell (SCell), wherein the first configuration includes first parameters for a synchronization signal / physical broadcast channel block (SSB) in the first SCell; receiving a single message indicating one or more of the first parameters; and receiving the SSB in the first SCell based on the parameters indicated by the single message among the first parameters.

[0009] In another aspect of this disclosure, a UE, a processor, and a storage medium are provided for performing signal transmission and reception methods.

[0010] In another aspect of this disclosure, a method performed by a base station (BS) in a wireless communication system is provided. The method includes the steps of: transmitting a first configuration for a first SCell, wherein the first configuration includes first parameters for an SSB in the first SCell; transmitting a single message indicating one or more of the first parameters; and transmitting an SSB in the first SCell based on the parameters indicated by the single message among the first parameters.

[0011] In another aspect of this disclosure, a BS, a processor, and a storage medium are provided for performing signal transmission and reception methods.

[0012] The device may include an autonomous vehicle that can communicate with at least the UE, the network, and another autonomous vehicle other than the communication device.

[0013] The above aspects of this disclosure are merely some preferred embodiments of this disclosure, and various embodiments reflecting the technical features of this disclosure can be derived and understood by those skilled in the art from the following detailed description of this disclosure.

[0014] Beneficial effects

[0015] According to one embodiment of this disclosure, when transmitting and receiving reference signals between communication devices, signals can be transmitted and received more efficiently based on operations different from those in the prior art.

[0016] Those skilled in the art will understand that the effects achievable through this disclosure are not limited to those specifically described above, and that other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 The structure of a radio frame is illustrated.

[0018] Figure 2 This example illustrates the resource grid during the duration of a time slot.

[0019] Figure 3 The structure of the Synchronization Signal Block (SSB) is illustrated.

[0020] Figure 4 This is a diagram illustrating a signal transmission / reception method according to an embodiment of the present disclosure.

[0021] Figures 5 to 8 An apparatus according to an embodiment of the present disclosure is illustrated. Detailed Implementation

[0022] The following technologies can be used in various wireless access systems such as 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). CDMA can be implemented as radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wireless Fidelity (WiFi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (LTE-A) is an evolution of 3GPP LTE. 3GPP New Radio or New Radio Access Technology (NR) is an evolution of 3GPP LTE / LTE-A.

[0023] For clarity, this disclosure will be described in the context of 3GPP communication systems (e.g., LTE and NR), which should not be construed as limiting the spirit of this disclosure. LTE refers to technologies beyond 3GPP TS 36.xxx version 8. Specifically, LTE technologies beyond 3GPP TS 36.xxx version 10 are referred to as LTE-A, and LTE technologies beyond 3GPP TS 36.xxx version 13 are referred to as LTE-A pro. 3GPP NR is a technology beyond 3GPP TS 38.xxx version 15. LTE / NR may be referred to as a 3GPP system. “xxx” specifies the technical specification number. LTE / NR may be collectively referred to as a 3GPP system. Background techniques, terms, abbreviations, etc., as used herein refer to technical specifications published prior to this disclosure. For example, the following documents may be referenced.

[0024] 3GPP NR

[0025] - 38.211: Physical Channels and Modulation

[0026] - 38.212: Multiplexing and Channel Coding

[0027] - 38.213: Physical layer procedures for control

[0028] - 38.214: Physical layer procedures for data

[0029] -3 8.300: General Description of NR and NG-RAN

[0030] - 38.331: Radio Resource Control (RRC) Protocol Specification

[0031] Figure 1 The radio frame structure used for NR is shown.

[0032] In NR, UL and DL transmissions are configured on a frame-by-frame basis. Each radio frame is 10ms long and is divided into two 5ms half-frames. Each half-frame is further divided into five 1ms subframes. Subframes are divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 OFDM (A) symbols. When using normal CP, each time slot includes 14 OFDM symbols. When using extended CP, each time slot includes 12 OFDM symbols. Symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0033] Table 1 exemplarily shows how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS under normal CP conditions.

[0034] [Table 1]

[0035] Table 2 shows the number of symbols per slot, the number of slots per frame, and the number of slots per subframe in the case of extended CP, depending on the SCS.

[0036] [Table 2]

[0037] In NR systems, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for a UE. Therefore, the (absolute time) duration of time resources (e.g., subframes, slots, or transmission time intervals (TTI)) consisting of the same number of symbols (for convenience, referred to as time units (TU)) can be configured differently among the aggregated cells.

[0038] In NR, various parameter sets (or SCSs) can be supported to support a wide range of 5G services. For example, a 15kHz SCS can support wide areas in traditional cellular bands, while a 30kHz or 60kHz SCS can support dense urban areas, lower latency, and wide carrier bandwidth. For 60kHz or higher SCSs, bandwidths greater than 24.25kHz can be supported to overcome phase noise.

[0039] The NR band can be defined by two types of frequency ranges, FR1 and FR2. FR1 and FR2 can be configured as shown in Table 3 below. FR2 can be millimeter wave (mmW).

[0040] [Table 3]

[0041] Figure 2 This shows the resource grid during the duration of a time slot.

[0042] A time slot comprises multiple symbols in the time domain. For example, a time slot may contain 14 symbols in normal CP and 12 symbols in extended CP. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RBs can be interleaved (simply called interleaving) in the frequency domain. An interleaving m∈{0, 1, ..., M-1} can consist of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interleavings. A bandwidth portion (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a set of parameters (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., five) BWPs. Data communication can be performed in active BWPs, and only one BWP can be enabled for a UE. Individual elements in a resource grid can be called resource elements (REs), to which a complex symbol can be mapped.

[0043] In a wireless communication system, the UE receives information from the BS in the downlink (DL) and transmits information to the BS in the uplink (UL). The information exchanged between the BS and the UE includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information exchanged. Physical channels correspond to a set of resource elements (REs) carrying information originating from higher layers. Physical signals correspond to a set of REs used by the physical layer but not carrying information originating from higher layers. Higher layers include the Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, etc.

[0044] DL physical channels include the Physical Broadcast Channel (PBCH), Physical Downlink Shared Channel (PDSCH), and Physical Downlink Control Channel (PDCCH). DL physical signals include the DL Reference Signal (RS), Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS). DL RS includes the Demodulation Reference Signal (DM-RS), Phase Tracking Reference Signal (PT-RS), and Channel State Information Reference Signal (CSI-RS). UL physical channels include the 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 Reference Signal (SRS).

[0045] In this disclosure, the base station (BS) may be, for example, a gNode B (gNB).

[0046] Figure 3 This diagram illustrates the structure of the Synchronization Signal Block (SSB). The UE can use the SSB to perform cell search, system information acquisition, beam alignment for initial access, DL measurements, etc. The terms SSB and SS / PBCH block are used interchangeably.

[0047] Reference Figure 3 The SSB comprises the PSS, SSS, and PBCH. The SSB consists of four consecutive OFDM symbols carrying the PSS, PBCH, SSS / PBCH, and PBCH respectively. Each of the PSS and SSS includes one OFDM symbol with 127 subcarriers, and the PBCH includes three OFDM symbols with 576 subcarriers. Polar coding and Quadrature Phase Shift Keying (QPSK) are applied to the PBCH. The PBCH includes data REs and DMRS REs in each OFDM symbol. Each RB has three DMRS REs, with three data REs between every two adjacent DMRS REs.

[0048] NES (Network Energy Saving)

[0049] The above content can be applied in conjunction with the methods proposed in this disclosure (described later). Alternatively, the content can illustrate the technical features of the methods proposed in this disclosure.

[0050] Furthermore, the following methods can be equally applied to the aforementioned NR systems (licensed bands) or shared spectrum. Therefore, it is evident that the terminology, expressions, and structure in this document can be modified to suit the system in order to implement the technical concepts of this disclosure in the corresponding system.

[0051] With the increasing demand for higher data rates, BSs need to be equipped with more antennas and provide services through wider bandwidths and frequency bands. Recent studies have shown that the energy cost of BSs has reached approximately 20% of total operating expenditures (OPEX). Energy efficiency of BSs is considered important in wireless communication systems, including 3GPP-based systems, in order to build environmentally friendly networks by reducing carbon emissions and to reduce the OPEX of communication service providers.

[0052] Due to increased interest in network power efficiency, a new research project entitled “Research on Network Power Efficiency” was approved for 3GPP NR Release 18. The technologies specified through this follow-up work project include: operation of SSB-free secondary cells (SCells) and co-located cells with inter-band carrier aggregation (CA) in Frequency Range 1 (FR1); enhancements to the cell DTX / DRX mechanism, including alignment of cell discontinuous transmission / discontinuous reception (DTX / DRX) and UE DRX in RRC_CONNECTED mode; and inter-node information exchange for cell DTX / DRX. This technology also includes spatial and power domain techniques for efficient adaptation of spatial elements, efficient adaptation of power values ​​between PDSCH and CSI-RS, mechanisms to prevent legacy UEs from camping in cells employing Release 18 Network Power Efficiency (NES) technologies, enhancements to the Conditional Handover (CHO) procedure, inter-node beam activation and enhancement for limiting paging to limited areas, and core requirements for Radio Resource Management / Radio Frequency (RRM / RF).

[0053] Among other technologies that have been found useful through research, there are those not yet specified in Rel-18. The Version 19 Working Item (Rel-19 WI) aims to employ additional technologies for gaining network energy-saving gains from useful technologies researched in Rel-18 but not yet adopted, such as On-Demand SSB and On-Demand System Information Block 1 (SIB1) transmission and common signal / channel transmission.

[0054] This disclosure proposes methods for BS to adjust SSB transmission in multi-cell scenarios and methods for UE to request SSB transmission adjustment.

[0055] [Method #1] The BS configures the UE with information regarding whether to perform SSB transmission for each SCell, SSB transmission-related parameters (e.g., the period of the SSB burst), and instructs the UE to adjust the transmission period by configuring / adding RRC signaling or SCell Activated Media Access Control Control Element (MAC-CE) for the SCell.

[0056] When the UE is capable of CA (Configuration and Control), it can configure SCells from the BS (Base Station) via RRC (Redirect Recognition) signaling. When configuring / adding a SCell, the corresponding SCell is initially in an inactive state. To receive PDCCH / PDSCH on the SCell, it needs to be activated via MAC-CE. When the UE has configured SCells (add / modify / release) or is instructed to activate a SCell via MAC-CE, the UE can configure information regarding whether to perform SSB (Service Blocking) transmissions for each SCell, as well as SSB transmission-related parameters. In this case, information regarding whether to perform SSB transmissions may include whether the SCell is an SSB-free SCell, whether on-demand SSBs are operated on the SCell, etc. SSB transmission-related parameters may include the period of SSB bursts / SSB indexes / SSB index groups, information about the resources used for the UE's SSB transmission adjustment requests, etc.

[0057] For example, through SCell configuration, the UE can configure multiple pre-grouped SSB indexes for each SCell, and can configure different periods / modes for each SSB burst, SSB index, or SSB index group. The UE can configure one or more period / mode candidates for each SSB index or SSB index group, and one of the pre-configured period / mode candidates for each SSB index or SSB index group for a specific SCell can be dynamically indicated to the UE by the BS based on cell conditions via a bitmap in Group Common Downlink Control Information (GC-DCI) or MAC-CE. The GC-DCI or MAC-CE monitoring timing (MO) used to adjust the period / mode of an SSB index or SSB index group can be configured as the SSB period or N multiplied by 5 ms (where N is a natural number greater than 1).

[0058] For example, two SSB index groups #0 / #1 can be configured in the SSB burst of SCell #1. When four cycle candidates such as {80ms, 160ms, 320ms, 640ms} are configured, the cycle of SSB index group #0 / #1 can be indicated by fields / bits (groups) in the bitmap (pre-configured in association with the corresponding SCell) in GC-DCI corresponding to the corresponding SCell. Of the four bits in the bitmap, the two most significant bits (MSB) can dynamically indicate the cycle of SSB index group #0, and the remaining two least significant bits (LSB) can dynamically indicate the cycle of SSB index group #1. Subsequent bits / fields of the bitmap can be pre-associated with other SCells configured for the UE, allowing cycle adjustments for multiple cells in units of SSB index / SSB index group to be indicated at once.

[0059] When the BS configures SSB transmission-related parameters for a specific cell (e.g., PCell) to the UE, the UE can be configured such that the same SSB transmission-related parameters are also applied to other cells (e.g., SCells) configured for the UE. Alternatively, the UE can configure different SSB transmission-related parameters individually for each SCell or each group of SCells. For example, an N-bit field / bitmap corresponding to each SCell or each group of SCells configured for the UE can be included in the GC-DCI, and the N-bit field / bitmap can indicate an index of a predefined periodic candidate for the SSB burst for each SCell or each group of SCells.

[0060] The UE can receive instructions from the BS for adjusting SSB transmission-related parameters for a specific cell or cell group via GC-DCI or MAC-CE. In this case, the UE can receive adjustment instructions for SSB transmission-related parameters for a specific cell or multiple cell groups via one GC-DCI or one MAC-CE.

[0061] The UE can receive indications of adjustments to SSB transmission parameters of non-anchor cells (e.g., SCell / SCell group) via the SSB or SIB1 of the anchor cell (e.g., PCell). For example, the UE can receive an indication that the SSB period for all or a specific SCell configured for the UE will be changed from 20 ms to 40 ms via specific PSS / SSS sequences, DMRS sequences, specific fields / bits of the PBCH, and / or specific fields / bits in the SIB1 PDCCH / PDSCH that constitute the SSB.

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

[0063] The UE may be pre-configured by an anchor cell (e.g., PCell) or a non-anchor cell (e.g., SCell) with resources and UL signals / channels for requesting SSB transmission adjustments, information about the cell to which the transmission adjustment request is to be sent, and information about the cell to which the response to the transmission adjustment request is to be received. Here, resources for SSB transmission adjustment requests may refer to resources used for the transmission of specific UL signals / channels (such as messages during the RACH process, including messages 1 / 3 / A, RO / RAPID, (SR)PUCCH, CG-PUSCH, P / SP-PUCCH / PUSCH, etc.). UL signals / channels may refer to specific UL signals / channels, such as messages during the RACH process, including messages 1 / 3 / A, RO / RAPID, (SR)PUCCH, CG-PUSCH, P / SP-PUCCH / PUSCH, etc.

[0064] Additionally, when an anchor cell and one or more non-anchor cells are configured for the UE, information indicating which cell to use to send the transmission adjustment request can be pre-configured for the UE. Based on this configuration, the UE can determine which cell to send the aforementioned resources and UL signals / channels for the SSB transmission adjustment request to. For example, when the UE accesses SCell#1, the UE can be configured to send a PRACH associated with RAPID=50 (which has been pre-configured for SSB transmission adjustment in SCell#1), or it can be configured to send a PRACH to the PCell.

[0065] The UE can be configured with UL resources individually for each cell requesting SSB adjustment. Alternatively, the UE can be configured with UL resources individually for each cell group. The UE can notify the BS of which cell / cell group the SSB adjustment request is for based on the UL resources. Furthermore, the UE can first notify the BS of the need for SSB transmission adjustment via a signal such as PRACH, and can send information about how to adjust the SSB by including the information in subsequent UL channels / signals. For example, the UE can request the SSB index (group) of the corresponding cell via message 1 configured for an SSB transmission adjustment request for a specific non-anchor cell, and can request a specific period value via message 3.

[0066] After sending an SSB transmission adjustment request, the UE can receive a response indicating whether the BS has successfully received the corresponding request and information regarding the SSB transmission adjustment, and can receive the adjusted SSB. In this case, the response from the BS to the SSB transmission adjustment request can use a Random Access Response (RAR) (Message 2) / Message 4 / Message B, an Acknowledgment (ACK), and GC-DCI or MAC-CE. Cells to receive the corresponding response can also be pre-configured. Through the BS response message, the UE can receive direct instructions on how to adjust the SSB transmission, such as which period among multiple predefined SSB burst period candidates should be used for the change and the time point at which the changed SSB transmission should be performed, or it can expect to receive the changed SSB from a predefined / configured time point.

[0067] When a UE is configured with a UL signal / channel for requesting SSB transmission adjustments, the UE can configure different UL signals / channels for the corresponding cell and can request SSB transmission cycles for a specific cell. The UE can pre-configure the associations between different SSB transmission adjustment parameters for the corresponding UL signal / channel and can request adjustments for specific SSB transmissions. Additionally, when a UE accesses a non-anchor cell and receives an SSB from another cell (e.g., an anchor cell or another non-anchor cell), the UE can request SSB cycle adjustments by sending a pre-configured specific UL signal / channel to the anchor cell.

[0068] [Method #3] When the period of the SSB index / SSB index group in an SSB burst can be dynamically adjusted by the BS or according to the UE's request, a method for handling conflicts of the SSB index / SSB index group during PDCCH / PDSCH reception and PUCCH / PUSCH transmission.

[0069] If the period of the SSB index / SSB index group and whether or not the SSB index / SSB index group is sent can be dynamically adjusted by the BS or at the request of the UE via method #1 / method #2, it may be necessary to modify the existing SSB send / receive operations. The UE may not expect the PDCCH / PDSCH scheduling of resources for sending the SSB index in an SSB burst, or may consider that resource invalid for PUCCH / PUSCH transmission and not use it for transmission. If the BS adjusts the period of a specific SSB index / SSB index group via GC-DCI or MAC-CE (or RAR / Message 4 / Message B), the presence or absence of the SSB index / SSB index group in the SSB burst can be changed. For example, after configuring / indicating the sending of SSB index #1 in an SSB burst on a specific symbol resource via ssb-PositionsInBurst, if the SSB period is doubled via GC-DCI, SSB index #1 for that specific SSB burst (e.g., even-numbered SSB bursts) may not be sent. For example, if SSB index #1 is transmitted for each even-numbered SSB burst, the UE expects to receive SSB index #1 for each even-numbered SSB burst, and may also expect to receive another DL signal / channel (PDCCH / PDSCH) or scheduled UL signal / channel (PUCCH / PUSCH) on the time / frequency resources on which SSB index #1 will be transmitted in odd-numbered SSB bursts.

[0070] As another approach, since the process of changing the PDCCH / PDSCH reception and PUCCH / PUSCH transmission by the UE can be cumbersome each time the SSB index / SSB index group is dynamically adjusted via GC-DCI or MAC-CE, the UE can perform the transmission / reception process by assuming the shortest adjustable period or by assuming the maximum number of SSBs can be transmitted.

[0071] When the BS configures a sparse SSB configuration with a long period and an additional SSB with a short period, and the activation / deactivation (activation / deactivation) of the additional SSB can be dynamically indicated via GC-DCI or MAC-CE, the resources for actually sending SSBs (i.e., SSB timing) may overlap with RACH timings (ROs) depending on whether the additional SSB is sent. In this case, 1) only ROs corresponding to the SSB indexes configured / indicated via SIB1 for SSB-to-RO mapping can be considered valid ROs, or 2) among the ROs determined to be valid by performing SSB-to-RO mapping based on the ssb-PositionsInBurst parameter configured by the higher layer, ROs that conflict with the additional SSBs can again be determined to be invalid. Alternatively, regardless of the actual transmission, all candidate resources for sending SSBs (i.e., all pre-configured SSB indexes / SSB index group adjustment modes / periods) can be considered, and ROs that conflict with such candidate resources can be excluded from the valid ROs.

[0072] This disclosure is not limited to the transmission and reception of UL and / or DL ​​signals. For example, this disclosure can also be used for direct communication between UEs. Additionally, the term "BS" in this disclosure can include both relay nodes and base stations. For example, the operation of the BS described in this document can be performed by a base station, but the operation can also be performed by a relay node.

[0073] Obviously, each example of the proposed method can also be included as an implementation of this disclosure, and thus each example can be considered as a proposed method. Although the proposed methods described above can be implemented independently, some of the proposed methods can be combined (or merged) and implemented. Furthermore, it can be specified that information regarding whether the proposed method is applied (or information regarding rules related to the proposed method) is transmitted from the BS to the UE or from the transmitting UE to the receiving UE in predefined signals (e.g., physical layer signaling or higher layer signaling).

[0074] Implementation example

[0075] Figure 4 This is a diagram illustrating a signal transmission / reception method according to an embodiment of the present disclosure.

[0076] Reference Figure 4The signal transmission / reception method according to embodiments of the present disclosure can be performed by a UE. The method may include the following steps: receiving a first configuration for a first SCell (S501), receiving a single message (S503), and receiving an SSB based on parameters indicated by the single message in the first configuration (S505). From the perspective of the BS, the signal transmission / reception method according to embodiments of the present disclosure may include the following steps: transmitting a first configuration for a first SCell (S501), transmitting a single message (S503), and transmitting an SSB based on parameters indicated by the single message in the first configuration (S505).

[0077] Apart from Figure 6 In addition to the operations described in methods #1 to #3, one or more operations can be performed.

[0078] For example, referring to method #1, when performing CA for multiple SCells, the configuration for each SCell may include parameters related to the SSB configuration in the corresponding SCell. For example, the first configuration includes a first parameter for the SSB configuration in the first SCell, and the second configuration includes a second parameter for the SSB configuration in the second SCell. The configuration for each SCell includes parameters indicating whether an SSB is received in the corresponding SCell (whether an SSB transmission is performed). Additionally, the configuration for each SCell includes parameters for the configurable period of each of the multiple SSB bursts, SSB indices, and / or SSB index groups in the corresponding SCell. The configuration for each SCell includes parameters for the resources used to request adjustments to the SSB transmission in the corresponding SCell. The UE may send a request to change the transmission period of the SSB on a specific resource based on each parameter.

[0079] In S503, a single message indicates one or more of the first and second parameters. A single message can be a single MAC-CE or a single DCI. Alternatively, a single message can be received via an SSB or SIB. A single message includes a first field for a first configuration and a second field for a second configuration, and the first and second fields are distinguished for each of the SSB burst, SSB index, and / or SSB index group. A single message can be received in a PCell or anchor cell, and the MO period can be configured based on the SSB period in each SCell.

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

[0081] In addition to reference Figure 4In addition to the operations described, references can also be executed in combination. Figures 1 to 3 The operation described and / or one or more of the operations described in method #2 and method #3.

[0082] Examples of using the communication system disclosed herein

[0083] The various descriptions, functions, processes, proposals, methods, and / or operation flowcharts of this disclosure can be applied to, but are not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0084] More specific examples will be described below with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise stated, the same reference numerals denote the same or corresponding hardware blocks, software blocks, or functional blocks.

[0085] Figure 5 An example of a communication system 1 applied to this disclosure is shown.

[0086] Reference Figure 5 The communication system 1 applied to this disclosure includes wireless devices, a network (BS), and a network. Wireless devices are devices that perform communication using radio access technology (RAT) (e.g., 5G NR (or new RAT) or LTE), also referred to as communication / radio / 5G devices. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, IoT devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of vehicle-to-vehicle (V2V) communication. In this document, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions (TVs), smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses), and computers (e.g., laptops). Home appliances may include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, the BS and network can be implemented as wireless devices, and a particular wireless device 200a can operate as a BS / network node for other wireless devices.

[0087] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can also perform direct communication with each other without BS / network intervention (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., V2V / Vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0088] Wireless communication / connections 150a, 150b, and 150c can be established between wireless devices 100a to 100f / BS 200 and between BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as UL / DL communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay or integrated access backhaul (IAB)). Wireless signals can be transmitted and received between wireless devices, between wireless devices and BSs, and between BSs via wireless communication / connections 150a, 150b, and 150c. For example, signals can be transmitted and received via various physical channels via wireless communication / connections 150a, 150b, and 150c. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0089] Examples of wireless devices that utilize this disclosure

[0090] Figure 6 A wireless device applicable to this disclosure is shown.

[0091] Reference Figure 6 The first wireless device 100 and the second wireless device 200 can transmit wireless signals via various RATs (e.g., LTE and NR). {The first wireless device 100 and the second wireless device 200} can correspond to... Figure 5 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0092] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and also includes one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 102 may process information in the memories 104 to generate a first information / signal, and then transmit a wireless signal including the first information / signal via the transceivers 106. The processor 102 may receive a wireless signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memories 104 may store software code including instructions for performing all or part of the processing controlled by the processor 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. Processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive wireless signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In this disclosure, the wireless device may be a communication modem / circuit / chip.

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

[0094] The hardware elements of wireless devices 100 and 200 will now be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as Physical (PHY), Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), RRC, and Service Data Adaptation Protocol (SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document, and provide such messages, control information, data, or information to one or more transceivers 106 and 206. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0095] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 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 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202 or may be stored in one or more memories 104 and 204 and driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or instruction sets.

[0096] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 can be configured to include read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 can be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0097] One or more transceivers 106 and 206 may transmit user data, control information, and / or wireless signals / channels mentioned in the methods and / or operation flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or wireless signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals. For example, one or more processors 102 and 202 may perform control to enable one or more transceivers 106 and 206 to transmit user data, control information, or wireless signals to one or more other devices. One or more processors 102 and 202 may perform control to enable one or more transceivers 106 and 206 to receive user data, control information, or wireless signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document through one or more antennas 108 and 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 and 206 may convert received radio signals / channels from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, and radio signals / channels processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0098] Examples of the use of wireless devices applying this disclosure

[0099] Figure 7 Another example of a wireless device applied to this disclosure is shown. The wireless device can be adapted according to use cases / services (see reference). Figure 5 It is realized in various forms.

[0100] Reference Figure 7 Wireless devices 100 and 200 can correspond to Figure 6The wireless devices 100 and 200 can be configured to include various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 6 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 6 The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory 130, and add-on components 140, and provides overall control of the wireless device. For example, control unit 120 can control the electrical / mechanical operation of the wireless device based on programs / code / instructions / information stored in memory unit 130. Control unit 120 can transmit information stored in memory unit 130 to an external source (e.g., other communication devices) via communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., other communication devices) via communication unit 110 in memory unit 130 via a wireless / wired interface.

[0101] The add-on component 140 can be configured in various ways depending on the type of wireless device. For example, the add-on component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be configured as (but is not limited to) a robot. Figure 5 100a), vehicles ( Figure 5 100b-1 and 100b-2), XR device ( Figure 5 100c), handheld device ( Figure 5 100d), home appliances ( Figure 5 100e), IoT devices ( Figure 5 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, AI servers / devices ( Figure 5 400), BS ( Figure 5 This can be achieved through methods such as 200 (network nodes, etc.). Depending on the usage / service, the wireless device can be mobile or fixed.

[0102] exist Figure 7In wireless devices 100 and 200, all elements, components, units / parts, and / or modules can be connected to each other via wired interfaces, or at least a portion thereof can be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 can be wired connected, and control unit 120 and first units (e.g., 130 and 140) can be wirelessly connected via communication unit 110. The various elements, components, units / parts, and / or modules in wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured using a collection of one or more processors. For example, control unit 120 may be configured using a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. In another example, memory 130 may be configured using RAM, dynamic RAM (DRAM), ROM, flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0103] Examples of vehicles or autonomous vehicles that utilize this disclosure

[0104] Figure 8 The present disclosure illustrates a vehicle or autonomous vehicle. The vehicle or autonomous vehicle can be implemented as a mobile robot, car, train, manned / unmanned aerial vehicle (AV), vessel, etc.

[0105] Reference Figure 8 The vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive 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 part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to... Figure 6 Blocks 110 / 130 / 140.

[0106] Communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include an ECU. Drive unit 140a enables the vehicle or autonomous vehicle 100 to travel on a road. Drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering mechanism, etc. Power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuitry, battery, etc. Sensor unit 140c can acquire information about vehicle status, surrounding environment, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle within its lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a determined path, and technologies for automatically setting a route if a destination is set, etc.

[0107] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate autonomous driving routes and driving plans from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous driving vehicle 100 to move along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can acquire recent traffic information data from an external server non-periodically / periodically, and acquire surrounding traffic information data from nearby vehicles. During autonomous driving, sensor unit 140c can acquire information about vehicle status and / or surrounding environment. Autonomous driving unit 140d can update the autonomous driving route and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving route, and / or driving plan to an external server. The external server can use AI technology to predict traffic information data based on information collected from the vehicle or autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0108] Those skilled in the art will understand that this disclosure may be implemented in other specific ways besides those set forth herein without departing from the spirit and essential characteristics of this disclosure. Therefore, the above embodiments are to be construed as illustrative in all respects and not restrictive. The scope of this disclosure should be determined by the appended claims and their legal equivalents (rather than the foregoing description), and all changes falling within the meaning and scope of the appended claims are intended to be covered therewith.

[0109] Industrial applicability

[0110] As stated above, this disclosure applies to various wireless communication systems.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising the following steps: Receive a first configuration for a first secondary cell SCell, wherein the first configuration includes a first parameter for a synchronization signal / physical broadcast channel block (SSB) in the first SCell; Receive a single message indicating one or more of the first parameters; and The SSB is received in the first SCell based on the parameter indicated by the single message in the first parameter.

2. The method according to claim 1, further comprising the following steps: Receive a second configuration for a second SCell different from the first cell, wherein the second configuration includes second parameters for the SSB in the second SCell; and Receive SSB in the second cell. Wherein, one or more of the second parameters are indicated by the single message, and The SSB of the second cell is received based on parameters indicated by the single message.

3. The method according to claim 1, in, The single message is a single Media Access Control Element (MAC-CE) or a single Downlink Control Message (DCI).

4. The method according to claim 1, in, The individual message is received via the primary cell PCell.

5. The method according to claim 2, in, Each of the first configuration and the second configuration includes a parameter indicating whether the SSB is received in the corresponding SCell.

6. The method according to claim 2, in, Each of the first configuration and the second configuration includes parameters for the period that can be configured for each of the multiple SSB index groups in the corresponding SCell.

7. The method according to claim 2, in, Each of the first configuration and the second configuration includes parameters for adjusting resources for SSB transmissions in the corresponding SCell requested by the UE.

8. The method according to claim 7, further comprising the following step: The single message is requested based on the parameters for the adjusted resources used by the UE to request the SSB transmission in the corresponding SCell.

9. The method according to claim 2, in, The single message includes a first field for the first configuration and a second field for the second configuration, and Specifically, the first field and the second field are distinguished for the multiple SSB index groups.

10. The method according to claim 2, in, Based on the period of the SSB in the first SCell and the period of the SSB in the second SCell, configure the period of the monitoring timing MO for the individual message.

11. The method according to claim 1, in, The individual message is received via SSB or System Information Block (SIB).

12. A user equipment (UE) operating in a wireless communication system, the UE comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation. The specific operations include: Receive a first configuration for a first secondary cell SCell, wherein the first configuration includes a first parameter for a synchronization signal / physical broadcast channel block (SSB) in the first SCell; Receive a single message indicating one or more of the first parameters; and The SSB is received in the first SCell based on the parameter indicated by the single message in the first parameter.

13. An apparatus for a user equipment (UE), the apparatus comprising: At least one processor; as well as At least one computer memory, operatively connected to the at least one processor and configured to, when executed, cause the at least one processor to perform operations including: Receive a first configuration for a first secondary cell SCell, wherein the first configuration includes a first parameter for a synchronization signal / physical broadcast channel block (SSB) in the first SCell; Receive a single message indicating one or more of the first parameters; and The SSB is received in the first SCell based on the parameter indicated by the single message in the first parameter.

14. A non-transitory computer-readable storage medium comprising at least one computer program configured to cause a user equipment (UE) having at least one processor to perform operations, the operations including: Receive a first configuration for a first secondary cell SCell, wherein the first configuration includes a first parameter for a synchronization signal / physical broadcast channel block (SSB) in the first SCell; Receive a single message indicating one or more of the first parameters; and The SSB is received in the first SCell based on the parameter indicated by the single message in the first parameter.

15. A method performed by a base station (BS) in a wireless communication system, the method comprising the following steps: Send a first configuration for the first secondary cell SCell, wherein the first configuration includes a first parameter for the synchronization signal / physical broadcast channel block (SSB) in the first SCell; Send a single message indicating one or more of the first parameters; and The SSB is sent in the first SCell based on the parameter indicated by the single message in the first parameter.

16. A base station (BS) operating in a wireless communication system, the BS comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation. The specific operations include: Send a first configuration for the first secondary cell SCell, wherein the first configuration includes a first parameter for the synchronization signal / physical broadcast channel block (SSB) in the first SCell; Send a single message indicating one or more of the first parameters; and The SSB is sent in the first SCell based on the parameter indicated by the single message in the first parameter.

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