A method and apparatus for reception beam management based on downlink assignment index in a communication system

Abstract

An electronic device according to various embodiments disclosed in this document comprises one or more antennas, a communication circuit, and a processor operatively connected to said communication circuit, wherein the processor monitors a physical downlink control channel (PDCCH) from a base station for a specified time based on the control area setting of a downlink control channel of at least one serving cell, checks a downlink assignment index (DAI) field included in the PDCCH received as a result of said monitoring, and, if a specified event occurs, may be configured to adjust at least some of the receiving beams of said one or more antennas for at least some of said at least one serving cell.

Description

Technology Field

[0001] The various embodiments disclosed in this document relate to a device for managing a receiving beam for receiving a signal from a base station in a communication system, for example, to a DAI-based receiving beam management device. Background Technology

[0002] Efforts are being made to develop improved 5G or pre-5G communication systems to meet the increasing demand for wireless data traffic since the commercialization of 4G communication systems. For this reason, 5G or pre-5G communication systems are referred to as systems beyond the 4G network or systems following the LTE (long term evolution) system. To achieve high data transmission rates, the implementation of 5G communication systems in the mmWave band (e.g., the 60 GHz band) is being considered. To mitigate path loss and increase transmission distance in the mmWave band, technologies such as beamforming, massive MIMO, full Dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antennas are being discussed for 5G communication systems. In addition, to improve the network of the system, the development of technologies such as advanced small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, CoMP (Coordinated Multi-Points), and interference cancellation is taking place in 5G communication systems.In addition, advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), as well as advanced access technologies such as FBMC (Filter Bank Multi Carrier), NOMA (non-orthogonal multiple access), and SCMA (sparse code multiple access), are being developed in 5G systems.

[0003] Meanwhile, the Internet is evolving from a human-centric network where humans generate and consume information into an IoT (Internet of Things) network that processes information by exchanging it among distributed components, such as objects. IoE (Internet of Everything) technology, which combines IoT with Big Data processing technologies through connections with cloud servers, is also emerging. To implement IoT, technological elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required; consequently, technologies such as sensor networks, Machine-to-Machine (M2M) communication, and Machine-Type Communication (MTC) are currently being researched to facilitate the connection of objects. In an IoT environment, intelligent IT services that create new value for human life by collecting and analyzing data generated from connected objects can be provided. Through the convergence and integration of existing IT technologies with various industries, IoT can be applied to fields such as smart homes, smart buildings, smart cities, smart or connected cars, smart grids, healthcare, smart home appliances, and advanced medical services.

[0004] Accordingly, various attempts are being made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, Machine to Machine (M2M), and Machine Type Communication (MTC) are being implemented using 5G communication techniques such as beamforming, MIMO, and array antennas. The application of cloud RAN as a big data processing technology, as previously described, can also be considered an example of the convergence of 5G and IoT technologies. The problem to be solved

[0005] Various embodiments disclosed in this document may provide an apparatus and method for managing a receiving beam based on a DAI (downlink assignment index) received in a communication system.

[0006] Various embodiments disclosed in this document provide an apparatus and method for monitoring DAI received through multiple cells in a communication system to estimate whether a PDCCH (physical downlink control channel) is received and managing a received beam based thereon.

[0007] The technical problems to be solved in this disclosure are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0008] An electronic device according to various embodiments disclosed in this document comprises one or more antennas, a communication circuit, and a processor operatively connected to said communication circuit, wherein the processor monitors a physical downlink control channel (PDCCH) from a base station for a specified time based on the control area setting of a downlink control channel of at least one serving cell, checks a downlink assignment index (DAI) field included in the PDCCH received as a result of said monitoring, and, when a specified event occurs, may be configured to adjust at least some of the receiving beams of said one or more antennas for at least some of said at least one serving cell.

[0009] A method of an electronic device according to various embodiments disclosed in this document may include, based on setting a control area of ​​a downlink control channel of at least one serving cell, monitoring a physical downlink control channel (PDCCH) from a base station for a specified time, checking a downlink assignment index (DAI) field included in the PDCCH received as a result of the monitoring, and adjusting at least some of the receiving beams of one or more antennas for at least some of the at least one serving cell when a specified event occurs. Effects of the invention

[0010] According to various embodiments, the receiving beam can be managed based on the DAI (downlink assignment index) received in the communication system, thereby enabling more efficient management of the receiving beam.

[0011] According to various embodiments, the status of the receiving beam for multiple cells can be efficiently monitored by monitoring whether a PDCCH is received based on a DAI received through multiple cells in a communication system.

[0012] According to various embodiments, the reception beam can be managed based on DAI received through multiple cells in a communication system to increase the PDCCH reception rate, and based on this, more efficient data transmission and reception can be performed through multiple cells.

[0013] In addition, various effects that can be identified directly or indirectly through this document may be provided. Brief explanation of the drawing

[0014] In relation to the description of the drawings, identical or similar configurations 요소에 Identical or similar reference numerals may be used for this. FIG. 1 is a diagram illustrating the structure of a next-generation mobile communication system according to various embodiments. FIG. 2 is a diagram illustrating the wireless protocol structure of a next-generation mobile communication system according to various embodiments. FIG. 3 is a diagram illustrating carrier aggregation (CA) according to various embodiments. FIG. 4 is a diagram illustrating an example of a cross-carrier scheduling method according to one embodiment of the present disclosure. FIG. 5 is a diagram illustrating an example of setting a control resource set (CORESET) of a downlink control channel in a wireless communication system according to one embodiment of the present disclosure. FIG. 6 is a diagram illustrating a method for determining DAI when scheduling a PDSCH for a cell through a single PDCCH according to the present disclosure. FIG. 7 is a block diagram of an electronic device in a network environment according to various embodiments. FIG. 8 is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments. FIG. 9 illustrates an embodiment of the structure of a third antenna module described with reference to FIG. 8 according to various embodiments. FIG. 10 is a flowchart of a DAI-based receiving beam management method according to various embodiments. FIG. 11 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment. FIG. 12 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment. FIG. 13 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment. FIG. 14 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment. FIG. 15 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment. Specific details for implementing the invention

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0016] In describing the embodiments, technical details that are well known in the art to which the present invention belongs and are not directly related to the present invention are omitted. This is intended to convey the essence of the present invention more clearly without obscuring it by omitting unnecessary explanations.

[0017] For the same reason, some components in the attached drawings have been exaggerated, omitted, or schematically depicted. Additionally, the size of each component does not entirely reflect its actual dimensions. Identical or corresponding components in each drawing have been assigned the same reference number.

[0018] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. The embodiments of the present disclosure are provided merely to make the disclosure complete and to fully inform those skilled in the art of the scope of the invention, and the present disclosure is defined only by the scope of the claims. Throughout the specification, like reference numerals refer to like components.

[0019] At this point, it will be understood that each block of the process flow diagrams and combinations of the flow diagrams can be executed by computer program instructions. Since these computer program instructions can be loaded into the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, the instructions executed through the processor of the computer or other programmable data processing equipment create means to perform the functions described in the flow diagram block(s). Since these computer program instructions can also be stored in computer-available or computer-readable memory that can be directed toward the computer or other programmable data processing equipment to implement the function in a specific way, the instructions stored in computer-available or computer-readable memory can also produce a manufactured item containing means of instruction to perform the function described in the flow diagram block(s). Since computer program instructions can be loaded onto a computer or other programmable data processing equipment, instructions that execute a computer or other programmable data processing equipment by performing a series of operation steps on the computer or other programmable data processing equipment to create a process executed by the computer may also provide steps for executing the functions described in the flowchart block(s).

[0020] Additionally, each block may represent a module, segment, or part of code containing one or more executable instructions for executing a specific logical function(s). It should also be noted that in some alternative execution examples, the functions mentioned in the blocks may occur out of order. For instance, two blocks described in succession may actually be executed substantially simultaneously, or the blocks may be executed in reverse order depending on the corresponding function.

[0021] In this embodiment, the term "part" as used refers to a software or hardware component such as an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit), and the "part" performs certain roles. However, the meaning of "part" is not limited to software or hardware. The "part" may be configured to reside in an addressable storage medium or may be configured to run one or more processors. Accordingly, according to some embodiments, the "part" includes components such as software components, object-oriented software components, class components, and task components, as well as processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and "parts" may be combined into a smaller number of components and "parts" or further separated into additional components and "parts." In addition, the components and 'parts' may be implemented to utilize one or more CPUs within the device or secure multimedia card. Also, according to some embodiments, the 'parts' may include one or more processors.

[0022] The operating principle of the present invention will be described in detail below with reference to the attached drawings. In describing the present invention below, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description will be omitted. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, such definitions should be based on the content throughout this specification. Hereinafter, a base station is an entity that performs resource allocation for terminals and may be at least one of a gNode B, eNode B, Node B, BS (Base Station), wireless access unit, base station controller, or a node on a network. A terminal may include a UE (User Equipment), MS (Mobile Station), cellular phone, smartphone, computer, or a multimedia system capable of performing communication functions. Of course, it is not limited to the above examples. Hereinafter, the present disclosure describes a technology for a terminal to receive broadcast information from a base station in a wireless communication system. The present disclosure relates to a communication technique and a system for integrating a 5G (5th generation) communication system with IoT (Internet of Things) technology to support higher data transmission rates than those of 4G (4th generation) systems. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security and safety-related services, etc.) based on 5G communication technology and IoT-related technology.

[0023] Terms used in the following description to refer to broadcast information, control information, communication coverage, state changes (e.g., events), network entities, messages, and device components are examples provided for the convenience of explanation. Accordingly, the present invention is not limited to the terms described below, and other terms having equivalent technical meanings may be used.

[0024] For the convenience of the following explanation, some terms and names defined in the 3GPP LTE (3rd generation partnership project long term evolution) standard may be used. However, the present invention is not limited by the above terms and names and can be applied in the same way to systems conforming to other standards.

[0025] FIG. 1 is a diagram illustrating the structure of a next-generation mobile communication system according to various embodiments.

[0026] Referring to FIG. 1, the wireless access network of a next-generation mobile communication system (hereinafter NR or 5G) may be composed of a next-generation base station (new radio node B, hereinafter NR gNB or NR base station) (110) and a next-generation wireless core network (new radio core network, NR CN) (105). A next-generation wireless user terminal (new radio user equipment, NR UE or terminal) (115) may connect to an external network through the NR gNB (110) and the NR CN (105).

[0027] In FIG. 1, the NR gNB (110) can correspond to the eNB (evolved node B) of the existing LTE system. The NR gNB is connected to the NR UE (115) via a wireless channel and can provide a service that is more advanced than that of the existing node B. In the next-generation mobile communication system, all user traffic can be serviced through a shared channel. Therefore, a device is required to collect state information such as the buffer status, available transmission power status, and channel status of the UEs and perform scheduling, and the NR gNB (110) can handle this. A single NR gNB can control multiple cells. In the next-generation mobile communication system, a bandwidth greater than the current maximum bandwidth can be applied to achieve ultra-high-speed data transmission compared to current LTE. Additionally, beamforming technology can be incorporated by using orthogonal frequency division multiplexing (OFDM) as the wireless access technology. In addition, an adaptive modulation & coding (hereinafter referred to as AMC) scheme that determines the modulation scheme and channel coding rate according to the channel conditions of the terminal may be applied.

[0028] The NR CN (105) can perform functions such as mobility support, bearer configuration, and QoS configuration. The NR CN is a device responsible for various control functions as well as mobility management functions for terminals, and can be connected to multiple base stations. In addition, the next-generation mobile communication system can be interoperable with existing LTE systems, and the NR CN can be connected to the MME (125) via a network interface. The MME can be connected to the existing base station eNB (130).

[0029] FIG. 2 is a diagram illustrating the wireless protocol structure of a next-generation mobile communication system according to various embodiments.

[0030] Referring to FIG. 2, the wireless protocol of the next-generation mobile communication system consists of an NR service data adaptation protocol (SDAP) (201, 245), an NR PDCP (Packet Data Convergence Protocol) (205, 240), an NR RLC (Radio Link Control) (210, 235), an NR MAC (Medium Access Control) (215, 230), and an NR PHY (220, 225) at the terminal and the NR base station, respectively.

[0031] The main functions of NR SDAP (201, 245) may include at least some of the following functions.

[0032] - User data transfer function (transfer of user plane data)

[0033] - Mapping function between a QoS flow and a DRB for both DL and UL for uplink and downlink

[0034] - Marking QoS flow ID in both DL and UL packets for uplink and downlink

[0035] - Function to map reflective QoS flow to data bearers for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

[0036] For SDAP layer devices, the terminal may receive a radio resource control (RRC) message indicating whether to use the SDAP layer device header or the SDAP layer device functions for each PDCP layer device, for each bearer, or for each logical channel. If the SDAP header is configured, the terminal may be instructed to update or reset the mapping information for the uplink and downlink QoS flows and data bearers using the 1-bit NAS reflective QoS indicator and the 1-bit AS reflective QoS indicator of the SDAP header. The SDAP header may include QoS flow ID information indicating QoS. The QoS information may be used for data processing priorities, scheduling information, etc., to support seamless service.

[0037] The main functions of NR PDCP (205, 240) may include some of the following functions.

[0038] - Header compression and decompression features (ROHC only)

[0039] - User data transfer function (Transfer of user data)

[0040] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0041] - Out-of-sequence delivery of upper layer PDUs

[0042] - Reordering function (PDCP PDU reordering for reception)

[0043] - Duplicate detection function (Duplicate detection of lower layer SDUs)

[0044] - Retransmission of PDCP SDUs

[0045] - Encryption and decryption functions (Ciphering and deciphering)

[0046] - Timer-based SDU discard in uplink.

[0047] In the above description, the reordering function of the NR PDCP device may refer to a function that reorders PDCP PDUs received from a lower layer in order based on the PDCP SN (sequence number). The reordering function of the NR PDCP device may include a function to transmit data to an upper layer in the reordered order, a function to transmit immediately without considering the order, a function to record lost PDCP PDUs by reordering, a function to report the status of lost PDCP PDUs to the transmitting side, and a function to request retransmission of lost PDCP PDUs.

[0048] The main functions of NR RLC (210, 235) may include some of the following functions.

[0049] - Data transfer function (Transfer of upper layer PDUs)

[0050] - Sequential delivery function (In-sequence delivery of upper layer PDUs)

[0051] - Out-of-sequence delivery of upper layer PDUs

[0052] - ARQ function (Error Correction through ARQ)

[0053] - Concatenation, segmentation, and reassembly functions of RLC SDUs

[0054] - Re-segmentation function (Re-segmentation of RLC data PDUs)

[0055] - Reordering function (Reordering of RLC data PDUs)

[0056] - Duplicate detection

[0057] - Error detection function (Protocol error detection)

[0058] - RLC SDU discard function

[0059] RLC re-establishment function

[0060] In the above description, the in-sequence delivery function of the NR RLC device may refer to the function of delivering RLC SDUs received from a lower layer to an upper layer in sequence. In the case where a single RLC SDU is received divided into multiple RLC SDUs, the in-sequence delivery function of the NR RLC device may include the function of reassembling and delivering them.

[0061] The in-sequence delivery function of the NR RLC device may include a function to rearrange received RLC PDUs based on an RLC SN (sequence number) or PDCP SN (sequence number), a function to record lost RLC PDUs by rearranging the order, a function to report the status of lost RLC PDUs to the transmitting side, and a function to request retransmission of lost RLC PDUs.

[0062] The in-sequence delivery function of the NR RLC (210, 235) device may include a function to deliver only the RLC SDUs prior to the lost RLC SDU in order to the upper layer if there is a lost RLC SDU. Additionally, the in-sequence delivery function of the NR RLC device may include a function to deliver all RLC SDUs received before the timer started in order to the upper layer if a predetermined timer has expired even if there is a lost RLC SDU. Additionally, the in-sequence delivery function of the NR RLC device may include a function to deliver all RLC SDUs received up to the present in order to the upper layer if a predetermined timer has expired even if there is a lost RLC SDU.

[0063] The NR RLC (210, 235) device can process the RLC PDUs in the order they are received, regardless of the sequence number (Out of sequence delivery), and deliver them to the NR PDCP (205, 240) device.

[0064] When the NR RLC (210, 235) device receives a segment, it may receive segments that are stored in a buffer or will be received later, reconstruct them into a complete RLC PDU, and then transmit it to the NR PDCP device.

[0065] The NR RLC layer may not include a concatenation function, and the function may be performed by the NR MAC layer or replaced by the multiplexing function of the NR MAC layer.

[0066] In the above description, the out-of-sequence delivery function of the NR RLC device may refer to a function of delivering RLC SDUs received from a lower layer directly to an upper layer regardless of order. The out-of-sequence delivery function of the NR RLC device may include a function of reassembling and delivering RLC SDUs when a single RLC SDU is received divided into multiple RLC SDUs. The out-of-sequence delivery function of the NR RLC device may include a function of storing the RLC SN or PDCP SN of the received RLC PDUs, sorting the order, and recording the lost RLC PDUs.

[0067] The NR MAC (215, 230) can be connected to multiple NR RLC layer devices configured in a terminal, and the main functions of the NR MAC may include some of the following functions.

[0068] - Mapping function (Mapping between logical channels and transport channels)

[0069] - Multiplexing and demultiplexing functions (Multiplexing / demultiplexing of MAC SDUs)

[0070] - Scheduling information reporting function

[0071] - HARQ function (Error correction through HARQ (hybrid automatic repeat request))

[0072] - Priority handling between logical channels of one UE

[0073] - Priority handling between UEs by means of dynamic scheduling

[0074] - MBMS service identification function

[0075] - Transport format selection function

[0076] - Padding

[0077] The NR PHY layer (220, 225) can perform the operation of channel coding and modulating upper layer data, creating OFDM symbols and transmitting them to the wireless channel, or demodulating OFDM symbols received through the wireless channel and channel decoding them to transmit them to the upper layer.

[0078] FIG. 3 is a diagram illustrating carrier aggregation (CA) according to various embodiments.

[0079] Referring to Fig. 3, when CA is configured (300), PCell (primary cell) and SCell (secondary cell) can be configured as serving cells in the terminal.

[0080] PCell is included in the PCC (primary component carrier) and can provide RRC connection establishment / re-establishment, measurement, mobility procedures, random access procedures and selection, system information acquisition, initial random access, security key change and non-access stratum (NAS) functions.

[0081] Since the terminal performs system information monitoring through the PCell, the PCell is not deactivated, and in the UL, the PCC is carried via the PUCCH (physical uplink control channel) for the transmission of control information. Additionally, only one RRC can be connected between the terminal and the PCell, and PDCCH / PDSCH / PUSCH (physical uplink shared channel) / PUCCH transmission is possible. Furthermore, in a secondary cell group, the PSCell (spcell of a secondary cell group) can be configured and operated as the PCell. The operations for the PCell described below can also be performed by the PSCell.

[0082] Up to a total of 31 Scells can be added, and SCells can be configured via RRC messages (e.g., dedicated signaling) when additional radio resources are required. RRC messages may include the physical cell ID for each cell and the DL carrier frequency (absolute radio frequency channel number: ARFCN). PDCCH / PDSCH / PUSCH transmission is possible through SCells. Dynamic activation and deactivation procedures for SCells are supported via the MAC layer to conserve the UE's battery.

[0083] Meanwhile, as the number of NR terminals in the network increases, an issue regarding the lack of scheduling capacity for NR terminals has been raised. To resolve this, cross-carrier scheduling (hereinafter referred to as cross-carrier scheduling) can be used to schedule PDSCH or PUSCH for PCell or PScell ​​through the PDCCH of SCell.

[0084] Cross-carrier scheduling may mean assigning at least one of all L1 control channels or L2 control channels (e.g., PDCCH) for at least one other component carrier (CC) to a single CC. A carrier indicator field (CIF) may be used to transmit data information from another CC through the PDCCH of one CC.

[0085] Resources for data transmission of said CC (PDSCH, PUSCH) or resources for data transmission of another CC (PDSCH, PUSCH) can be allocated through control information transmitted through the PDCCH of one CC.

[0086] With the application of cross-carrier scheduling, a 3-bit CIF is added to the DCI (downlink control information) format, the bit size is always fixed, and the DCI format size can also be fixed regardless of position.

[0087] The DCI may include resource allocation information and other control information for a user terminal (115) or a group of terminals. For example, the DCI may include uplink or downlink scheduling information or uplink transmission (Tx) power control commands.

[0088] FIG. 4 is a diagram illustrating an example of a cross-carrier scheduling method according to one embodiment of the present disclosure.

[0089] Referring to 410 in Fig. 4, PDSCH or PUSCH for two CCs can be scheduled through PDCCH (401) of one CC.

[0090] In addition, referring to 420 in Fig. 4, when a total of 4 CCs are set, the PDSCH or PUSCH of each CC can be scheduled using the PDCCH (421, 423) of two CCs.

[0091] Each CC can be mapped to a CI (carrier indicator) value for CIF application, and this can be transmitted from the base station to the terminal via a dedicated RRC signal with UE-specific settings.

[0092] Each PDSCH / PUSCH CC can be scheduled from a single DL CC. Therefore, for each PDSCH / PUSCH CC, the UE only needs to monitor the PDCCH from the said DL CC. The terminal can obtain PUSCH scheduling information from the linked UL carrier by monitoring the PDCCH from the said DL CC. The terminal can obtain PDSCH scheduling information from the linked DL carrier by monitoring the PDCCH from the said DL CC.

[0093] Meanwhile, to address the aforementioned problem of insufficient scheduling capacity, a method for improving cross-carrier scheduling is required. To this end, a method of scheduling PDSCHs for multiple cells through a single PDCCH may be considered. At this time, the number of cells that can be set through the PDCCH may be set to a maximum of two, but this is merely an example of the present disclosure and the number of cells that can be set through the PDCCH may be changed.

[0094] Meanwhile, the present disclosure may be applied to dynamic spectrum sharing (DSS) which allows LTE and NR to coexist on the same carrier, thereby enabling a telecommunications operator to switch to an NR communication system while maintaining an existing LTE communication system. Additionally, the present disclosure may be applied to cases where an NR communication system is used as a standalone system.

[0095] FIG. 5 is a diagram illustrating an example of setting a control resource set (CORESET) of a downlink control channel in a wireless communication system according to one embodiment of the present disclosure.

[0096] Referring to FIG. 5, FIG. 5 illustrates an example in which two control areas (control area #1 (CORESET #1) (501), control area #2 (CORESET #2) (502)) are set within a single slot (520) in the frequency axis and within a terminal bandwidth portion (510) in the time axis. The control areas (501, 502) can be set in a specific frequency resource (503) within the entire terminal bandwidth portion (510) in the frequency axis. The control areas (501, 502) can be set with one or more OFDM symbols in the time axis, which can be defined as the control resource set duration (504). In the example of FIG. 5, control area #1 (501) is set with a control resource set duration of two symbols, and control area #2 (502) is set with a control resource set duration of one symbol.

[0097] The control domain in 5G described above can be configured by a base station to a terminal through upper-layer signaling (e.g., system information, MIB (master information block), RRC (radio resource control) signaling). Configuring a control domain to a terminal means providing the terminal with information such as the control domain identity, the frequency location of the control domain, and the symbol length of the control domain. For example, the information in Table 1 may be included.

[0098]

[0099] Therefore, the terminal can monitor the PDCCH in the control area set from the base station and transmit and receive data based on the received control information. Meanwhile, NR can provide various forms of DCI formats as shown in Table 2 below to efficiently receive control information from the terminal.

[0100] DCI format Usage 0_0 Scheduling of PUSCH in one cell 0_1 Scheduling of PUSCH in one cell 0_2 Scheduling of PUSCH in one cell 1_0 Scheduling of PDSCH in one cell 1_1 Scheduling of PDSCH in one cell 1_2 Scheduling of PDSCH in one cell 2_0 Notifying a group of UEs of the slot format 2_1 Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE 2_2 Transmission of TPC commands for PUCCH and PUSCH 2_3 Transmission of a group of TPC commands for SRS transmissions by one or more UEs

[0101] For example, a base station may use DCI format 1_0, DCI format 1_1, or DCI format 1_2 to schedule a PDSCH for a single cell to a terminal. Additionally, a base station may use DCI format 1_0, DCI format 1_1, or DCI format 1_2 to schedule a PDSCH for multiple cells to a terminal. Alternatively, a base station may use a different DCI format to schedule a PDSCH for multiple cells to a terminal. Although DCI format 1_1 is described as an example in this disclosure, other DCI formats may be used, and accordingly, some of the information below may be omitted and other information necessary for scheduling multiple cells may be included.

[0102] For example, a base station may use DCI format 0_0, DCI format 0_1, or DCI format 0_2 to schedule a PUSCH for a single cell to a terminal. Additionally, a base station may use DCI format 0_0, DCI format 0_1, or DCI format 0_2 to schedule a PUSCH for multiple cells to a terminal. Alternatively, a base station may use a different DCI format to schedule a PUSCH for multiple cells to a terminal. Although DCI format 0_1 ​​is described as an example in this disclosure, other DCI formats may be used, and accordingly, some of the information below may be omitted and other information necessary for scheduling multiple cells may be included.

[0103] When DCI format 1_0 is transmitted with a CRC scrambled by a C-RNTI (cell radio network temporary identifier), a CS-RNTI (configured scheduling RNTI), or a new-RNTI, it may include at least the following information:

[0104] - Identifier for DCI formats(1 bit): Always set to 1 as the DCI format indicator

[0105] - frequency domain resource assignment (NRBG bits or bits): Indicates frequency axis resource allocation, and when DCI format 1_0 is monitored in the UE-specific search space is the size of the active DL BWP, and in other cases is the size of the initial DL BWP. NRBG is the number of resource block groups. For details on the method, refer to the frequency axis resource allocation above.

[0106] - Time domain resource assignment (0~4 bits): Indicates the allocation of time domain resources in PDSCH.

[0107] - VRB-to-PRB mapping(1 bit): 0 indicates non-interleaved, 1 indicates interleaved VRP-to-PRB mapping.

[0108] - Modulation and coding scheme (5 bits): Indicates the modulation order and coding rate used for PDSCH transmission.

[0109] - New data indicator (1 bit): Indicates whether the PDSCH is an initial transmission or a retransmission depending on whether it is toggled.

[0110] - Redundancy version (2 bits): Indicates the redundancy version used for PDSCH transmission.

[0111] - HARQ process number (4 bits): Indicates the HARQ process number used for PDSCH transmission.

[0112] - Downlink assignment index (2 bits): DAI indicator

[0113] - TPC command for scheduled PUCCH (2 bits): PUCCH power control indicator

[0114] - PUCCH resource indicator(3 bits): A PUCCH resource indicator that indicates one of the 8 resources set to the upper layer.

[0115] - PDSCH-to-HARQ_feedback timing indicator(3 bits): HARQ feedback timing indicator, which indicates one of the 8 feedback timing offsets set to the upper layer.

[0116] When DCI format 1_1 is transmitted with a CRC scrambled by a C-RNTI (cell radio network temporary identifier), a CS-RNTI (configured scheduling RNTI), or a new-RNTI, it includes at least the following information:

[0117] - Identifier for DCI formats(1 bit): DCI format indicator, always set to 1

[0118] - Carrier indicator (0 or 3 bits): Indicates the CC (or cell) to which the PDSCH assigned by the DCI is transmitted.

[0119] - Bandwidth part indicator (0 or 1 or 2 bits): Indicates the BWP to which the PDSCH assigned by the corresponding DCI is transmitted.

[0120] - Frequency domain resource assignment (payload determined according to the above frequency domain resource assignment): Instructs frequency domain resource assignment, and is the size of the active DL BWP. For details on the method, refer to the frequency axis resource allocation above.

[0121] - Time domain resource assignment (0 ~ 4 bits): Instructs time domain resource allocation according to the above description.

[0122] - VRB-to-PRB mapping (0 or 1 bit): 0 indicates non-interleaved VRP-to-PRB mapping, and 1 indicates interleaved VRP-to-PRB mapping. It is bit 0 if the frequency axis resource allocation is set to resource type 0.

[0123] - PRB bundling size indicator (0 or 1 bit): 0 bit if the upper layer parameter prb-BundlingType is not set or is set to 'static', and 1 bit if it is set to 'dynamic'.

[0124] - Rate matching indicator (0 or 1 or 2 bits): Indicates the rate matching pattern.

[0125] - ZP CSI-RS trigger(0 or 1 or 2 bits): Indicator that triggers aperiodic ZP CSI-RS.

[0126] - For transport block 1:

[0127] - Modulation and coding scheme (5 bits): Indicates the modulation order and coding rate used for PDSCH transmission.

[0128] - New data indicator (1 bit): Indicates whether the PDSCH is an initial transmission or a retransmission depending on whether it is toggled.

[0129] - Redundancy version (2 bits): Indicates the redundancy version used for PDSCH transmission.

[0130] - For transport block 2:

[0131] - Modulation and coding scheme (5 bits): Indicates the modulation order and coding rate used for PDSCH transmission.

[0132] - New data indicator (1 bit): Indicates whether the PDSCH is an initial transmission or a retransmission depending on whether it is toggled.

[0133] - Redundancy version (2 bits): Indicates the redundancy version used for PDSCH transmission.

[0134] - HARQ process number (4 bits): Indicates the HARQ process number used for PDSCH transmission.

[0135] - Downlink assignment index (0 or 2 or 4 bits): DAI indicator

[0136] - TPC command for scheduled PUCCH (2 bits): PUCCH power control indicator

[0137] - PUCCH resource indicator(3 bits): A PUCCH resource indicator that indicates one of the 8 resources set to the upper layer.

[0138] - PDSCH-to-HARQ_feedback timing indicator(3 bits): HARQ feedback timing indicator, which indicates one of the 8 feedback timing offsets set to the upper layer.

[0139] - Antenna port (4 or 5 or 6 bits): Indicates DMRS port and CDM group without data.

[0140] - Transmission configuration indication (0 or 3 bits): TCI indicator.

[0141] - SRS request (2 or 3 bits): SRS transmission request indicator

[0142] - CBG transmission information (0 or 2 or 4 or 6 or 8 bits): An indicator indicating whether code block groups within the allocated PDSCH are transmitted. 0 means that the corresponding CBG is not transmitted, and 1 means that it is transmitted.

[0143] - CBG flushing out information (0 or 1 bit): An indicator indicating whether previous CBGs are corrupted; 0 means they may be corrupted, and 1 means they can be used when receiving a retransmission (combinable).

[0144] - DMRS sequence initialization (0 or 1 bit): DMRS scrambling ID selection indicator

[0145] The maximum number of different sizes of DCIs that a terminal can receive per slot in the cell is 4. The maximum number of different sizes of DCIs scrambled with C-RNTI that a terminal can receive per slot in the cell is 3.

[0146] Meanwhile, the information included in the above DCI format 1_0 or 1_1 is merely one embodiment of the present disclosure, and some information may be omitted or other information may be added. In addition, at least some of the above information may be included in a DCI format other than the above DCI format 1_0 or 1_1.

[0147] Meanwhile, as described above, when scheduling PDSCHs for multiple cells through a single PDCCH, a new method for determining the DAI value included in the control information needs to be defined. Furthermore, in the present disclosure, the DAI can be used in combination with the downlink allocation index.

[0148] FIG. 6 is a diagram illustrating a method for determining DAI when scheduling a PDSCH for a cell through a single PDCCH according to the present disclosure.

[0149] As described above, the DCI or DCI format transmitted via the PDCCH that schedules the PDSCH may include a DAI. There may be two types of DAIs: a counter DAI (610) and a total DAI (620), and the value of each DAI means the following.

[0150] The value of the counter DAI (610) field denotes the cumulative number of {serving cell, PDCCH monitoring occasion}-pair(s) in which DCI formats associated with PDSCH reception(s) or SPS PDSCH release exist up to the current serving cell and current PDCCH monitoring occasion. In this case, counting can be done first in ascending order of serving cell index and then in ascending order of PDCCH monitoring occasion index m, where ).

[0151] The value of the total DAI (620) field represents the total number of {serving cell, PDCCH monitoring occasion}-pair(s) in which DCI formats associated with PDSCH(s) or SPS PDSCH release exist up to the current PDCCH monitoring occasion. The value of the total DAI field can be updated at every PDCCH monitoring occasion.

[0152] Referring to FIG. 6, four serving cells (601, 602, 603, 604) may be configured and activated in the terminal, and the terminal may monitor PDCCH in each serving cell and receive scheduled PDSCH through PDCCH. The values ​​of counter DAI and total DAI included in the DCI transmitted through PDCCH may be as shown in FIG. 6. However, the figures shown in FIG. 6 are numbers for illustrative purposes only, and the actual size of each DAI field may be determined by upper layer settings, etc., and the actual transmitted DAI value may be determined through modulo operations. Specifically, the size of the DAI field may be determined depending on whether specific information is included in or activated (or enabled) in the configuration information transmitted through the upper layer. The specific information may be, for example, information indicating whether total DAI is included. Alternatively, the configuration information may include information that directly indicates the size of the DAI field. Furthermore, the counter DAI value and total DAI value may be included in the DAI field. Therefore, if the total DAI value is not included, the DAI field may be the same as the counter DAI value, and if the total DAI value is included, the MSB of a specific bit and the LSB of a specific bit of the DAI field may indicate the counter DAI and the total DAI. Specifically, when the number of bits of DAI is NDAI, TD is 2NDAI, and the value of Y is the number of {serving cell, PDCCH monitoring occasion}-pair(s) where PDSCH(s) or PDCCH(s) associated with 'SPS PDSCH release' exist, the value of the DAI field actually transmitted can be determined as the value of (Y-1) mod TD + 1.

[0153] The terminal can perform PDCCH monitoring and may miss some of the PDCCHs (or PDCCH detection failure or PDCCH lost). FIG. 6 illustrates an example of missing a PDCCH (630) in serving cell #2 (603).

[0154] Although the terminal missed the PDCCH for serving cell #2, it can determine the size of the HARQ-ACK codebook to be 6 based on the total DAI value confirmed through another PDCCH, and since it did not receive the PDCCH containing the counter DAI value 5, it can set the 5th value of the HARQ-ACK codebook to NACK. Therefore, through the above method, an accurate HARQ codebook can be determined even when some PDCCHs are not received.

[0155] FIG. 7 is a block diagram of an electronic device (701) in a network environment (700) according to various embodiments. Referring to FIG. 7, in the network environment (700), the electronic device (701) may communicate with an electronic device (702) through a first network (798) (e.g., a short-range wireless communication network) or with at least one of an electronic device (704) or a server (708) through a second network (799) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (701) may communicate with the electronic device (704) through a server (708). According to one embodiment, the electronic device (701) may include a processor (720), memory (730), input module (750), sound output module (755), display module (760), audio module (770), sensor module (776), interface (777), connection terminal (778), haptic module (779), camera module (780), power management module (788), battery (789), communication module (790), subscriber identification module (796), or antenna module (797). In some embodiments, at least one of these components (e.g., connection terminal (778)) may be omitted from the electronic device (701), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (776), camera module (780), or antenna module (797)) may be integrated into a single component (e.g., display module (760)).

[0156] The processor (720) can control at least one other component (e.g., a hardware or software component) of the electronic device (701) connected to the processor (720) by executing software (e.g., a program (740)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (720) can store commands or data received from other components (e.g., a sensor module (776) or a communication module (790)) in volatile memory (732), process the commands or data stored in volatile memory (732), and store the resulting data in non-volatile memory (734). According to one embodiment, the processor (720) may include a main processor (721) (e.g., a central processing unit or an application processor) or an auxiliary processor (723) that can operate independently or together with it (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device (701) includes a main processor (721) and an auxiliary processor (723), the auxiliary processor (723) may be configured to use less power than the main processor (721) or to be specialized for a designated function. The auxiliary processor (723) may be implemented separately from the main processor (721) or as part thereof.

[0157] The auxiliary processor (723) may control at least some of the functions or states associated with at least one component of the electronic device (701) (e.g., display module (760), sensor module (776), or communication module (790)) on behalf of the main processor (721) while the main processor (721) is in an inactive (e.g., sleep) state, or together with the main processor (721) while the main processor (721) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (723) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (780) or communication module (790)). According to one embodiment, the auxiliary processor (723) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (701) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (708)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0158] The memory (730) can store various data used by at least one component of the electronic device (701) (e.g., processor (720) or sensor module (776)). The data may include, for example, software (e.g., program (740)) and input or output data for related commands. The memory (730) may include volatile memory (732) or non-volatile memory (734).

[0159] The program (740) may be stored as software in memory (730) and may include, for example, an operating system (742), middleware (744), or an application (746).

[0160] The input module (750) can receive commands or data to be used for a component of the electronic device (701) (e.g., processor (720)) from outside the electronic device (701) (e.g., user). The input module (750) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0161] The sound output module (755) can output a sound signal to the outside of the electronic device (701). The sound output module (755) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0162] The display module (760) can visually provide information to an external (e.g., user) of the electronic device (701). The display module (760) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (760) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0163] The audio module (770) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (770) can acquire sound through the input module (750) or output sound through the sound output module (755) or an external electronic device (e.g., electronic device (702)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (701).

[0164] The sensor module (776) can detect the operating state of the electronic device (701) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (776) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0165] The interface (777) may support one or more specified protocols that can be used for the electronic device (701) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (702)). According to one embodiment, the interface (777) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0166] The connection terminal (778) may include a connector through which the electronic device (701) can be physically connected to an external electronic device (e.g., electronic device (702)). According to one embodiment, the connection terminal (778) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0167] The haptic module (779) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (779) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0168] The camera module (780) can capture still images and video. According to one embodiment, the camera module (780) may include one or more lenses, image sensors, image signal processors, or flashes.

[0169] The power management module (788) can manage the power supplied to the electronic device (701). According to one embodiment, the power management module (788) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0170] The battery (789) can supply power to at least one component of the electronic device (701). According to one embodiment, the battery (789) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0171] The communication module (790) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (701) and an external electronic device (e.g., electronic device (702), electronic device (704), or server (708)), and the performance of communication through the established communication channel. The communication module (790) may include one or more communication processors that operate independently of the processor (720) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (790) may include a wireless communication module (792) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (794) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (704) through a first network (798) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (799) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (792) can identify or authenticate the electronic device (701) within a communication network such as the first network (798) or the second network (799) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (796).

[0172] The wireless communication module (792) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (792) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (792) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (792) can support various requirements specified in the electronic device (701), external electronic device (e.g., electronic device (704)), or network system (e.g., second network (799)). According to one embodiment, the wireless communication module (792) can support a Peak data rate (e.g., 20 Gbps or more) for eMBB realization, loss coverage (e.g., 164 dB or less) for mMTC realization, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for URLLC realization.

[0173] An antenna module (797) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (797) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (797) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (798) or a second network (799), may be selected from the plurality of antennas, for example, by a communication module (790). A signal or power may be transmitted or received between the communication module (790) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (797).

[0174] According to various embodiments, the antenna module (797) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0175] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0176] According to one embodiment, commands or data may be transmitted or received between the electronic device (701) and an external electronic device (704) through a server (708) connected to a second network (799). Each of the external electronic devices (702, or 704) may be the same or a different type of device as the electronic device (701). According to one embodiment, all or part of the operations performed on the electronic device (701) may be performed on one or more of the external electronic devices (702, 704, or 708). For example, if the electronic device (701) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (701) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (701). The electronic device (701) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (701) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (704) may include an Internet of Things (IoT) device. The server (708) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (704) or the server (708) may be included within the second network (799).The electronic device (701) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0177] The electronic device according to the various embodiments disclosed in this document may be of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a consumer electronics device. The electronic device according to the embodiments of this document is not limited to the devices described above.

[0178] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as “coupled” or “connected” to another (e.g., 2nd) component, with or without the terms “functionally” or “communicationly,” it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0179] The term “module” as used in the various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0180] Various embodiments of the present document may be implemented as software (e.g., program (740)) comprising one or more instructions stored in a storage medium (e.g., internal memory (736) or external memory (738)) readable by a machine (e.g., electronic device (701)). For example, a processor (e.g., processor (720)) of the machine (e.g., electronic device (701)) may call at least one of the one or more instructions stored from the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0181] According to one embodiment, the method according to the various embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0182] According to various embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to various embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to various embodiments, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0183] FIG. 8 is a block diagram (800) of an electronic device (e.g., the electronic device (701) of FIG. 7) for supporting legacy network communication and 5G network communication according to various embodiments.

[0184] Referring to FIG. 8, the electronic device (701) may include a first communication processor (812), a second communication processor (814), a first radio frequency integrated circuit (RFIC) (822), a second RFIC (824), a third RFIC (826), a fourth RFIC (828), a first radio frequency front end (RFFE) (832), a second RFFE (834), a first antenna module (842), a second antenna module (844), and an antenna (848). The electronic device (701) may further include a processor (e.g., processor (720) of FIG. 7) and a memory (e.g., memory (730) of FIG. 7). A network (e.g., second network (799) of FIG. 7) may include a first network (892) and a second network (894). According to another embodiment, the electronic device (701) may further include at least one of the components described in FIG. 7, and the network (799) may further include at least one other network. According to one embodiment, the first communication processor (812), the second communication processor (814), the first RFIC (822), the second RFIC (824), the fourth RFIC (828), the first RFFE (832), and the second RFFE (834) may form at least a part of a wireless communication module (e.g., the wireless communication module (792) of FIG. 7). According to another embodiment, the fourth RFIC (828) may be omitted or included as part of the third RFIC (826).

[0185] The first communication processor (812) can establish a communication channel in a band to be used for wireless communication with the first network (892) and support legacy network communication through the established communication channel. According to various embodiments, the first network may be a legacy network including a second-generation (5G), 3G, 4G, or long-term evolution (LTE) network. The second communication processor (814) can establish a communication channel corresponding to a designated band (e.g., about 6 GHz to about 60 GHz) among the bands to be used for wireless communication with the second network (894) and support 5G network communication through the established communication channel. According to various embodiments, the second network (894) may be a 5G network as defined by 3GPP. Additionally, according to one embodiment, the first communication processor (812) or the second communication processor (814) may support the establishment of a communication channel corresponding to another designated band (e.g., about 6 GHz or less) among the bands to be used for wireless communication with the second network (894), and 5G network communication through the established communication channel. According to one embodiment, the first communication processor (812) and the second communication processor (814) may be implemented within a single chip or a single package. According to various embodiments, the first communication processor (812) or the second communication processor (814) may be formed within a single chip or a single package with the processor (720), an auxiliary processor (e.g., the auxiliary processor (723) of FIG. 7), or a communication module (e.g., the communication module (790) of FIG. 7).

[0186] The first RFIC (822) can convert a baseband signal generated by the first communication processor (812) during transmission into a radio frequency (RF) signal of about 700 MHz to about 3 GHz used in the first network (892) (e.g., legacy network). During reception, the RF signal is acquired from the first network (892) (e.g., legacy network) through an antenna (e.g., first antenna module (842)) and can be preprocessed through an RFFE (e.g., first RFFE (832)). The first RFIC (822) can convert the preprocessed RF signal into a baseband signal so that it can be processed by the first communication processor (812).

[0187] The second RFIC (824) can convert a baseband signal generated by the first communication processor (812) or the second communication processor (814) into an RF signal of the Sub6 band (e.g., about 6 GHz or less) used in the second network (894) (e.g., 5G network) (hereinafter, 5G Sub6 RF signal). When receiving, the 5G Sub6 RF signal is acquired from the second network (894) (e.g., 5G network) through an antenna (e.g., the second antenna module (844)) and can be preprocessed through an RFFE (e.g., the second RFFE (834)). The second RFIC (824) can convert the preprocessed 5G Sub6 RF signal into a baseband signal so that it can be processed by the corresponding communication processor among the first communication processor (812) or the second communication processor (814).

[0188] The third RFIC (826) can convert a baseband signal generated by the second communication processor (814) into an RF signal of the 5G Above6 band (e.g., approximately 6 GHz to approximately 60 GHz) to be used in the second network (894) (e.g., 5G network) (hereinafter, 5G Above6 RF signal). Upon reception, the 5G Above6 RF signal may be acquired from the second network (894) (e.g., 5G network) through an antenna (e.g., antenna (848)) and preprocessed through the third RFFE (836). The third RFIC (826) can convert the preprocessed 5G Above6 RF signal into a baseband signal so that it can be processed by the second communication processor (814). According to one embodiment, the third RFFE (836) may be formed as part of the third RFIC (826).

[0189] According to one embodiment, the electronic device (701) may include a fourth RFIC (828) separately from or at least as part of the third RFIC (826). In this case, the fourth RFIC (828) may convert a baseband signal generated by the second communication processor (814) into an RF signal (hereinafter referred to as an IF signal) in an intermediate frequency band (e.g., about 9 GHz to about 11 GHz) and then transmit the IF signal to the third RFIC (826). The third RFIC (826) may convert the IF signal into a 5G Above6 RF signal. Upon reception, the 5G Above6 RF signal may be received from the second network (894) (e.g., a 5G network) through an antenna (e.g., antenna (848)) and converted into an IF signal by the third RFIC (826). The fourth RFIC (828) can convert the IF signal into a baseband signal so that the second communication processor (814) can process it.

[0190] According to one embodiment, the first RFIC (822) and the second RFIC (824) may be implemented as at least part of a single chip or a single package. According to one embodiment, the first RFFE (832) and the second RFFE (834) may be implemented as at least part of a single chip or a single package. According to one embodiment, at least one of the first antenna module (842) or the second antenna module (844) may be omitted or combined with another antenna module to process RF signals of a plurality of corresponding bands.

[0191] According to one embodiment, the third RFIC (826) and the antenna (848) may be placed on the same substrate to form a third antenna module (846). For example, a wireless communication module (792) or a processor (720) may be placed on a first substrate (e.g., a main PCB). In this case, the third RFIC (826) may be placed on a portion of a second substrate (e.g., a sub PCB) separate from the first substrate (e.g., a bottom surface), and the antenna (848) may be placed on another portion of a second substrate (e.g., a sub PCB) to form a third antenna module (846). By placing the third RFIC (826) and the antenna (848) on the same substrate, it is possible to reduce the length of the transmission line between them. This can reduce the loss (e.g., attenuation) of signals in the high-frequency band (e.g., about 6 GHz to about 60 GHz) used for 5G network communication by the transmission line. As a result, the electronic device (701) can improve the quality or speed of communication with the second network (894) (e.g., 5G network).

[0192] According to one embodiment, the antenna (848) may be formed as an antenna array comprising a plurality of antenna elements that can be used for beamforming. In this case, the third RFIC (826) may include a plurality of phase shifters (838) corresponding to the plurality of antenna elements, for example, as part of the third RFFE (836). During transmission, each of the plurality of phase shifters (838) can change the phase of a 5G Above6 RF signal to be transmitted to the outside of the electronic device (701) (e.g., a base station of a 5G network) through the corresponding antenna element. During reception, each of the plurality of phase shifters (838) can change the phase of a 5G Above6 RF signal received from the outside through the corresponding antenna element to the same or substantially the same phase. This enables transmission or reception via beamforming between the electronic device (701) and the outside.

[0193] The second network (894) (e.g., 5G network) may be operated independently of the first network (892) (e.g., legacy network) (e.g., Stand-Alone (SA)) or connected (e.g., Non-Stand Alone (NSA)). For example, the 5G network may only have an access network (e.g., 5G radio access network (RAN) or next generation RAN (NG RAN)) and no core network (e.g., next generation core (NGC)). In this case, the electronic device (701) can access the access network of the 5G network and then access an external network (e.g., the Internet) under the control of the core network of the legacy network (e.g., evolved packed core (EPC)). Protocol information for communication with a legacy network (e.g., LTE protocol information) or protocol information for communication with a 5G network (e.g., New Radio (NR) protocol information) is stored in memory (430) and can be accessed by other parts (e.g., processor (720), first communication processor (812), or second communication processor (814)).

[0194] FIG. 9 illustrates an embodiment of the structure of a third antenna module (846) described, for example, with reference to FIG. 8. FIG. 9 (a) is a perspective view of the third antenna module (846) viewed from one side, and FIG. 9 (b) is a perspective view of the third antenna module (846) viewed from the other side. FIG. 9 (c) is a cross-sectional view of the third antenna module (846) along X-X'.

[0195] Referring to FIG. 9, in one embodiment, the third antenna module (846) may include a printed circuit board (910), an antenna array (930), a radio frequency integrate circuit (RFIC) (952), or a power manage integrate circuit (PMIC) (954). Optionally, the third antenna module (846) may further include a shielding member (990). In other embodiments, at least one of the aforementioned components may be omitted, or at least two of the components may be formed integrally.

[0196] A printed circuit board (910) may include a plurality of conductive layers and a plurality of non-conductive layers stacked alternately with said conductive layers. The printed circuit board (910) may provide electrical connections between various electronic components placed on the printed circuit board (910) and / or outside using wirings and conductive vias formed on said conductive layers.

[0197] An antenna array (930) (e.g., 848 in FIG. 8) may include a plurality of antenna elements (932, 934, 936, or 938) arranged to form a directional beam. The antenna elements (932, 934, 936, or 938) may be formed on a first surface of a printed circuit board (910) as illustrated. According to another embodiment, the antenna array (930) may be formed inside the printed circuit board (910). According to embodiments, the antenna array (930) may include a plurality of antenna arrays of the same or different shapes or types (e.g., dipole antenna arrays, and / or patch antenna arrays).

[0198] The RFIC (952) (e.g., 826 in FIG. 8) may be placed in another area of ​​the printed circuit board (910) spaced apart from the antenna array (e.g., a second side opposite the first side). The RFIC is configured to process signals of a selected frequency band transmitted and received through the antenna array (930). According to one embodiment, the RFIC (952) may convert a baseband signal obtained from a communication processor (not shown) into an RF signal of a specified band during transmission. The RFIC (952) may convert an RF signal received through the antenna array (930) into a baseband signal and transmit it to the communication processor during reception.

[0199] According to another embodiment, the RFIC (952) can up-convert an IF signal (e.g., about 9 GHz to about 11 GHz) obtained from an IFIC (intermediate frequency integrate circuit) (e.g., 828 in FIG. 8) during transmission into an RF signal of a selected band. The RFIC (952) can down-convert an RF signal obtained through an antenna array (930) during reception into an IF signal and transmit it to the IFIC.

[0200] The PMIC (954) may be placed in another part of the printed circuit board (910) (e.g., the second side) spaced apart from the antenna array (930). The PMIC receives voltage from the main PCB (not shown) and can provide the necessary power to various components (e.g., RFIC (952)) on the antenna module.

[0201] A shielding member (990) may be disposed on a part of the printed circuit board (910) (e.g., the second side) to electromagnetically shield at least one of the RFIC (952) or PMIC (954). According to one embodiment, the shielding member (990) may include a shield can.

[0202] Although not illustrated, in various embodiments, the third antenna module (846) may be electrically connected to another printed circuit board (e.g., main circuit board) through a module interface. The module interface may include a connecting member, e.g., a coaxial cable connector, a board-to-board connector, an interposer, or a flexible printed circuit board (FPCB). The RFIC (952) and / or PMIC (954) of the antenna module may be electrically connected to the printed circuit board through the connecting member.

[0204] An electronic device according to various embodiments (e.g., user terminal (115) of FIG. 1 or electronic device (701) of FIG. 7 or FIG. 8) comprises one or more antennas (e.g., first antenna module (842), second antenna module (844) and / or third antenna module (846) of FIG. 8), a communication circuit (e.g., communication module (790) of FIG. 7) and a processor (e.g., processor (720) of FIG. 7) operatively connected to the communication circuit, and the processor may be configured to monitor a physical downlink control channel (PDCCH) from a base station for a specified time based on the control area setting of a downlink control channel of at least one serving cell, check a downlink assignment index (DAI) field included in the PDCCH received as a result of the monitoring, and, if a specified event occurs, adjust at least some of the receiving beams of the one or more antennas for at least some of the at least one serving cell.

[0205] According to various embodiments, the specified event may include at least one of an event in which the number of missing PDCCHs during the specified time exceeds a threshold value or an event in which the PDCCHs are continuously missing.

[0206] According to various embodiments, the threshold value may be set based on conditions including at least one of the received signal strength, received beam width, service type, or characteristics of the running application.

[0207] According to various embodiments, the DAI field includes a counter DAI value and a total DAI value, and the processor may be configured to check for the existence of the DAI field values ​​based on the counter DAI values ​​for the values ​​of the DAI field including the same total DAI value included in each of the DCIs received during the specified time.

[0208] According to various embodiments, the processor may be configured to check whether all corresponding DAI field values ​​exist by increasing the counter DAI value one by one for the DAI fields containing the same total DAI value during the specified time until it becomes equal to the total DAI value.

[0209] According to various embodiments, if the at least one serving cell includes two or more Scells (secondary cells), the processor may be configured to adjust the receiving beam for at least one of the two or more Scells when the specified event occurs.

[0210] According to various embodiments, when the at least one serving cell includes two or more Scells (secondary cells), the processor may be configured to determine whether the specified event occurs for each of the two or more Scells based on information included in the DAI field of the DCI received during the specified time in the control area of ​​each of the two or more Scells, and to separately adjust the receiving beam for the Scell ​​among the two or more Scells where the specified event occurred.

[0211] According to various embodiments, the processor may be configured to adjust the receiving beam based on a previously performed RS measurement (reference signal measurement).

[0212] According to various embodiments, the processor may be configured to re-perform RS measurement and perform the receiving beam adjustment based thereon.

[0213] According to various embodiments, the DAI field includes a counter DAI value and a total DAI value, and the processor may be configured to update at least the total DAI value among the information included in the DAI field and, based on the information included in the updated DAI field, check the DAI field included in the PDCCH received through the coordinated receiving beam.

[0215] FIG. 10 is a flowchart of a DAI (downlink assignment index) based receiving beam management method according to various embodiments.

[0216] According to various embodiments, a processor (e.g., processor (720) of FIG. 7 or FIG. 8) of an electronic device (e.g., user terminal (115) of FIG. 1, electronic device (701) of FIG. 7 or FIG. 8) may adjust the receiving beam of at least one antenna (e.g., first antenna module (842), second antenna module (844) and / or third antenna module (846) of FIG. 8) to receive a signal from a network (e.g., base station (gNB (110) or eNB (130)) of FIG. 1 or FIG. 2, or second network (799) of FIG. 7 or FIG. 8).

[0217] According to various embodiments, the electronic device (701) may have a Pcell and / or at least one Scell ​​configured according to carrier aggregation (CA) in a wireless communication system. The processor (720) may receive downlink control information (DCI) or a PDCCH containing a DCI format from the base station (110) through a control resource set (CORESET) of a downlink control channel of a serving cell containing a PCcell and / or at least one Scell, depending on whether cross-carrier scheduling is configured.

[0218] According to one embodiment, the processor (720) may receive, in operation 1001, a control resource set (CORESET) of a downlink control channel of at least one serving cell from a base station. According to one embodiment, the processor (720) may monitor the PDCCH for a specified time based on the received control resource set (CORESET) of the downlink control channel in operation 1003.

[0219] According to various embodiments, the processor (720) can check the DAI field contained within the PDCCH detected according to the PDCCH monitoring result in operation 1005.

[0220] According to one embodiment, the processor (720) can check PDCCH scheduling information received through the control area of ​​the downlink control channel of the PCell and / or at least one Scell ​​by checking the DAI field value included in the DCI format of the received PDCCH.

[0221] According to various embodiments, the DAI field may include two fields, including a counter DAI value and a total DAI value.

[0222] According to various embodiments, the value of the counter DAI field may denote the cumulative number of {serving cell, PDCCH monitoring occasion}-pair(s) in which DCI formats associated with PDSCH(s) or SPS (semi persistent scheduling) PDSCH releases exist up to the current serving cell and current PDCCH monitoring occasion. In this case, counting may be performed first in ascending order of serving cell index and then in ascending order of PDCCH monitoring occasion index.

[0223] According to various embodiments, the value of the total DAI field represents the total number of {serving cell, PDCCH monitoring occasion}-pair(s) in which DCI formats associated with PDSCH(s) or SPS PDSCH release exist up to the current PDCCH monitoring occasion. The value of the total DAI field may be updated at every PDCCH monitoring occasion (The value of the total DAI, when present, in a DCI format denotes the total number of {serving cell, PDCCH monitoring occasion}-pair(s) in which PDSCH reception(s) or SPS PDSCH release associated with DCI formats is present, up to the current PDCCH monitoring occasion m and is updated from PDCCH monitoring occasion to PDCCH monitoring occasion).

[0224] According to various embodiments, the processor (720) can monitor the PDCCH for a 'specified time' or a 'specified unit time'.

[0225] According to one embodiment, the processor (720) can monitor the PDCCH by checking the value of the DAI field included in the DCI format received through at least one downlink control channel of the Pcell and / or at least one Scell ​​during a 'specified time' or 'specified unit time', and accordingly, can identify the missing PDCCH during the 'specified time' or 'specified unit time'.

[0226] According to one embodiment, the processor (720) detects a DAI field from the DCI format of the PDCCH received through at least one downlink control channel of the Pcell or at least one Scell, and through the total DAI value and the counter DAI value among the values ​​of the DAI field, can determine the total number of serving cells with a DCI format assigned to the electronic device (701) during the corresponding monitoring time and the cumulative number of serving cells with a DCI format up to the current serving cell or the current PDCCH monitoring point.

[0227] According to one embodiment, during a 'specified time' or 'specified unit time' (e.g., 'time corresponding to at least one slot' or 'time corresponding to multiple slots'), the processor (720) can detect a DAI field received through PDCCH monitoring for each serving cell and check the field value.

[0228] According to one embodiment, the 'specified time' or 'specified unit time' can be set based on at least some of the information such as the service type, signal strength, and operating frequency band used by the terminal.

[0229] According to one embodiment, the processor (720) can check the DAI field from the PDCCH received during the 'specified time' or 'specified unit time' to determine whether there exists a DAI field that includes the counter DAI value that is incremented one by one for each DAI field containing the same total DAI value until the counter DAI value becomes equal to the total DAI value.

[0230] According to one embodiment, the processor (720) can determine the total number of received DAI fields containing the same total DAI value and the counter DAI value of the DAI fields containing the same total DAI value received during the 'specified time' or 'specified unit time', and if there is a missing DAI field, estimate the counter DAI value included in the DAI field and accordingly confirm that the PDCCH containing the DAI field is missing.

[0231] According to one embodiment, the processor (720) can determine the total number of DAI fields to be received during a 'specified time' or 'specified unit time' by checking the counter DAI value and / or total DAI value included in the first DAI field received from, for example, Pcell. According to one embodiment, the processor (720) can determine whether there is a missing DAI field by checking each DAI field having the same total DAI value received from at least one Scell ​​during the 'specified time' or 'specified unit time', until the included counter DAI value sequentially reaches the total DAI value.

[0232] According to one embodiment, the processor (720) can identify a missing DAI field and determine that the PDCCH containing the missing DAI field is missing due to a detection failure or loss (PDCCH detection failure or PDCCH lost).

[0233] According to various embodiments, the processor (720) can check whether a specified event has occurred in operation 1007.

[0234] According to one embodiment, the specified event may include a case where the number of missing PDCCHs exceeds a specified threshold. According to one embodiment, the specified event may include a case where two or more PDCCHs are missing in succession (e.g., consecutive counter DAI values ​​of the DAI field). According to one embodiment, the specified event may include a case where PDCCHs are missing in succession (e.g. consecutive counter DAI values ​​of the missing DAI field). According to one embodiment, the specified event may include a case where PDCCHs are missing in succession exceeding a predetermined number over a certain period of time.

[0235] According to one embodiment, a specified threshold value may be determined based on various conditions such as received signal strength (Rx signal strength), received beam width (Rx beam width), operating frequency band, type of service, and characteristics of an application running on the electronic device (701). For example, the specified threshold value may be determined in proportion to the total DAI value.

[0236] According to one embodiment, the processor (720) can determine whether an event has occurred at a specified time (e.g., when the 'specified time' or 'specified unit time' of operation 1003 for PDCCH monitoring has ended).

[0237] According to various embodiments, when the processor (720) confirms that a specified event has occurred, it may adjust the receiving beam of at least one of the antennas of the electronic device (701) for at least some of the serving cells in operation 1009.

[0238] According to one embodiment, the processor (720) can adjust the receiving beam of at least one antenna (e.g., the first antenna module (842), the second antenna module (844) and / or the third antenna module (846) of FIG. 8).

[0239] According to one embodiment, the processor (720) can change the current receiving beam set for at least one antenna (e.g., the first antenna module (842), the second antenna module (844) and / or the third antenna module (846) of FIG. 8) to another receiving beam.

[0240] According to one embodiment, the processor (720) can adjust the receiving beam for at least one of the Pcell and / or at least one Scell ​​set in the electronic device (701). For example, the processor (720) can adjust the receiving beam for both the Pcell and at least one Scell. For example, the processor (720) can adjust the receiving beam for at least one selected of the Pcell and at least one Scell. For example, the processor (720) can adjust the receiving beam for the corresponding serving cell if it is identified that the PDCCH is missing among the Pcell and at least one Scell.

[0241] According to one embodiment, the processor (720) can adjust the receiving beam by re-performing the RS measurement (reference signal measurement) and determining a new best receiving beam based thereon. For example, the processor (720) can re-perform the RS measurement (reference signal measurement) when the PDCCH of all serving cells in the same slot is lost and determine a new best receiving beam based thereon.

[0242] According to one embodiment, the processor (720) can adjust the receiving beam to a different receiving beam based on a previously performed RS measurement. For example, if the PDCCH of some serving cells in the same slot is missing, the processor (720) can change the receiving beam to the next best receiving beam determined through the previous RS measurement.

[0243] According to one embodiment, RS measurement may be performed for a reference signal, for example, an SSB (synchronization signal block) or CSI-RS (channel state information reference signal), based on, for example, L1-RSRP (reference signal received power) or L1-SINR (signal-to-interference plus noise ratio) or other signal strength / quality measurements.

[0244] According to one embodiment, the processor (720) can monitor the PDCCH received through the next slot using the receiving beam adjusted according to the receiving beam adjustment.

[0245] According to one embodiment, the processor (720) can perform the operation of monitoring the PDCCH (1003) for the next 'specified time' or 'specified unit time' using the adjusted receiving beam according to the receiving beam adjustment, checking the value of the DAI field (1005), and checking whether a specified event has occurred (1007).

[0246] According to one embodiment, the processor (720) monitors the PDCCH received during the next 'specified time' or 'specified unit time' using the received beam adjusted according to the received beam adjustment, updates the DAI field value, and checks the DAI field included in the received PDCCH based on the updated DAI field value to determine whether the event has occurred.

[0247] According to one embodiment, the processor (720) monitors the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, updates the total DAI value and / or counter DAI value, and checks the value of the DAI field received through the PDCCH based on the updated DAI field value, thereby confirming whether there is a missing PDCCH.

[0248] The updating of the DAI value mentioned in the embodiments disclosed in this document may mean the updating of a variable used by the processor (702) for processing the DAI value included in the DCI received from the base station.

[0249] FIG. 11 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment.

[0250] Referring to FIG. 11, according to various embodiments, a processor (e.g., processor (720) of FIG. 7 or FIG. 8) of an electronic device (e.g., user terminal (115) of FIG. 1, electronic device (701) of FIG. 7 or FIG. 8) may adjust the receiving beam of at least one antenna (e.g., first antenna module (842), second antenna module (844) and / or third antenna module (846) of FIG. 8) to receive a signal from a network (e.g., base station (gNB (110) or eNB (130)) of FIG. 1 or FIG. 2, or second network (799) of FIG. 7 or FIG. 8).

[0251] According to one embodiment, the electronic device (701) may configure the Pcell (1101) and Scell ​​(1102) according to carrier aggregation (CA) in a wireless communication system. The processor (720) may receive a PDCCH containing a DCI (downlink control information) format from the base station (110) through the control resource set (CORESET) of the downlink control channel of the Pcell (1101) and / or Scell ​​(1102) depending on whether cross-carrier scheduling is configured. For example, among the three carriers, the Pcell may be configured in a frequency band below 6 GHz (below 6-GHz) and the Scell ​​may be configured in a frequency band above 6 GHz (above 6-GHz), but is not limited thereto, and each serving cell may be configured in various ways above or below 6 GHz. For example, among the three carriers, if Pcell uses subcarrier spacing of 30 kHz in the frequency band below 6 GHz and Scell ​​uses subcarrier spacing of 60 kHz in the frequency band above 6 GHz, then while one slot is received in Pcell, two slots can be received in Scell.

[0252] According to one embodiment, the processor (720) can check PDCCH scheduling information received through the control area of ​​the downlink control channel of the PCell and Scell ​​by checking the values ​​(1110 and 1120) of the DAI field included in the DCI format received through the control area of ​​the downlink control channel of at least one cell among the Pcell (1101) and Scell ​​(1102) set in the electronic device (701).

[0253] According to one embodiment, the processor (720) can determine the total number of DCI or DAI fields to be received during a specified time by checking the counter DAI value and / or total DAI value included in the DAI field received from the Pcell (1101) during a specified time or a specified unit time.

[0254] According to one embodiment, the processor (720) can check each DAI field having the same total DAI value received from Pcell (1101) or Scell ​​(1102) during a 'specified time' or 'specified unit time' to check if there is a missing DAI field until the included counter DAI value sequentially reaches the total DAI value.

[0255] According to one embodiment, the processor (720) can estimate a missing DAI field based on other DAI field values ​​received during a 'specified time' or 'specified unit time', and can determine that the PDCCH containing the missing DAI field is missing due to detection failure or loss (PDCCH detection failure or PDCCH lost).

[0256] Referring to the drawing, the DAI field may include two fields, including a counter DAI value (1110) and a total DAI value (1120).

[0257] According to one embodiment, the processor (720) may monitor the PDCCH for a 'specified time' or a 'specified unit time'. The processor (720) may monitor the PDCCH for, for example, the time during which one slot of the Pcell (1101) is received.

[0258] According to one embodiment, the processor (720) monitors the received PDCCH during the time when the second slot (1104) of the Pcell (1101) is received, for example, and can receive a PDCCH containing DAI field values ​​(3,4) through the Pcell (1101). The processor (720) can detect the DAI field values ​​and confirm that the total DAI value (1120) is 4 and the counter DAI value (1110) is 3, and accordingly, it can be known that during the time when the second slot (1104) is received, a DAI field representing the same total DAI value and a counter DAI value of 4 (in this example, 4,4) which is increased by 1 from 3 will be received through the PDCCH of the Scell.

[0259] According to one embodiment, the processor (720) monitors the PDCCH during the time the second slot (1104) is received, and checks the value of the DAI field received until the time the reception of the second slot (1104) is completed. If the DAI field having the value (4,4) is not received, it can determine that the PDCCH (1130) containing the DAI field (4,4) is missing (1150).

[0260] According to one embodiment, the processor (720) can confirm the occurrence of a specified event upon detecting (1150) that a PDCCH (1130) is missing. For example, if at least one PDCCH (1130) is missing, the specified event may be set to have occurred.

[0261] According to one embodiment, the processor (720) can change the current receiving beam set for at least one antenna (e.g., the first antenna module (842), the second antenna module (844) and / or the third antenna module (846) of FIG. 8) to another receiving beam.

[0262] According to one embodiment, the processor (720) can adjust the receiving beam by changing the previous receiving beam (1105) to another receiving beam (1107) for the Pcell (1101) and / or Scell ​​(1102) set in the electronic device (701). For example, the processor (720) can adjust the receiving beam for both the Pcell and at least one Scell.

[0263] According to one embodiment, the processor (720) can adjust the receiving beam by re-performing the reference signal measurement and determining a new best receiving beam based thereon, or adjust the receiving beam to a different receiving beam based on a previously performed RS measurement. For example, the processor (720) can change the receiving beam to the next best receiving beam after the best receiving beam determined through the previous RS measurement.

[0264] According to one embodiment, the processor (720) can monitor the PDCCH received through the next slot using the receiving beam (1107) adjusted according to the receiving beam adjustment.

[0265] According to one embodiment, the processor (720) can monitor the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and can update the value of the DAI field received through the PDCCH and monitor the PDCCH reception.

[0266] According to one embodiment, the processor (720) monitors the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and among the values ​​of the DAI field received through the PDCCH, the counter DAI value is maintained as an accumulated value, while the total DAI value is updated to, for example, 7, and the PDCCH reception can be monitored.

[0267] FIG. 12 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment.

[0268] Referring to FIG. 12, according to various embodiments, a processor (e.g., processor (720) of FIG. 7 or FIG. 8) of an electronic device (e.g., user terminal (115) of FIG. 1, electronic device (701) of FIG. 7 or FIG. 8) may adjust the receiving beam of at least one antenna (e.g., first antenna module (842), second antenna module (844) and / or third antenna module (846) of FIG. 8) to receive a signal from a network (e.g., base station (gNB (110) or eNB (130)) of FIG. 1 or FIG. 2, or second network (799) of FIG. 7 or FIG. 8).

[0269] According to one embodiment, the electronic device (701) may have a Pcell (1201) and a plurality of Scells (e.g., Scell ​​71 (1202) and Scell ​​72 (1203)) configured according to Carrier Aggregation (CA) in a wireless communication system. Depending on whether cross-carrier scheduling is configured, the processor (720) may receive a PDCCH containing a DCI (downlink control information) format from the base station (110) through a control resource set (CORESET) of the downlink control channel of the Pcell (1201) and / or Scell ​​(1202 and / or 1203). For example, among the three carriers, the Pcell may be configured in a band below 6 GHz (below 6-GHz) and the Scell ​​may be configured in a band above 6 GHz (above 6-GHz), but is not limited thereto, and each serving cell may be configured in various ways above or below 6 GHz. For example, among the three carriers, if Pcell uses subcarrier spacing of 30 kHz in the frequency band below 6 GHz and Scell ​​uses subcarrier spacing of 60 kHz in the frequency band above 6 GHz, then while one slot is received in Pcell, two slots can be received in Scell.

[0270] According to one embodiment, the processor (720) can check PDCCH scheduling information received through the control area of ​​the downlink control channel of Pcell (1201) and Scell ​​(1202 and 1203) by checking the values ​​(1210 and 1220) of the DAI field included in the DCI format received through the control area of ​​the downlink control channel of at least one cell among Pcell (1201) and Scell ​​(1202 and 1203) set in the electronic device (701).

[0271] According to one embodiment, the processor (720) can determine the total number of DCI or DAI fields to be received during a specified time by checking the counter DAI value and / or total DAI value included in the DAI field received from the Pcell (1201) during a specified time or a specified unit time.

[0272] According to one embodiment, the processor (720) can check each DAI field having the same total DAI value received from Pcell (1201) or Scell ​​(1202 or 1203) during a 'specified time' or 'specified unit time' to check if there is a missing DAI field as the included counter DAI value sequentially reaches the total DAI value.

[0273] According to one embodiment, the processor (720) can estimate a missing DAI field value based on other DAI field values ​​received during a 'specified time' or 'specified unit time', and can determine that the PDCCH containing the missing DAI field is missing due to a detection failure or loss (PDCCH detection failure or PDCCH lost).

[0274] Referring to the drawing, the DAI field may include two fields, including a counter DAI value (1210) and a total DAI value (1220).

[0275] According to one embodiment, the processor (720) may monitor the PDCCH for a 'specified time' or a 'specified unit time'. The processor (720) may monitor the PDCCH for, for example, the time during which one slot of the Pcell (1201) is received.

[0276] According to one embodiment, the processor (720) can monitor the received PDCCH during the time when the second slot (1204) of the Pcell (1201) is received, for example, to detect a DAI field from the PDCCH received through the Pcell (1201). The processor (720) can detect the DAI field value and confirm that the total DAI value (1220) is 7 and the counter DAI value (1210) is 5, and accordingly, during the time when the second slot (1204) is received, a DAI field having the same total DAI value and counter DAI values ​​of 6 and 7, which are increased by 1 from 5, in this example (6,7) and (7,7) as field values ​​will be received through the PDCCH of Scell ​​71 (1202) and / or Scell ​​72 (1203).

[0277] According to one embodiment, the processor (720) monitors the PDCCH during the time when the second slot (1204) of the Pcell is received, and checks the value of the DAI field received until the time when the reception of the second slot (1204) is completed. If the DAI field having a value of (6,7) and / or the DAI field having a value of (7,7) is not received, the processor may determine that the PDCCH (1230) and / or the PDCCH (1240) containing the DAI field (6,7) and / or (7,7) is missing (1250).

[0278] According to one embodiment, the processor (720) can confirm the occurrence of a specified event by detecting (1250) that a PDCCH (1230) is missing. For example, if two PDCCHs (1230 and 1240) are missing, it can be determined that a specified event has occurred because more than half of the total DAIs that are to be received during a 'specified time' or 'specified unit time' are not received.

[0279] According to one embodiment, the processor (720) can change the current receiving beam set for at least one antenna (e.g., the first antenna module (842), the second antenna module (844), and / or the third antenna module (846) of FIG. 8) to another receiving beam. According to one embodiment, the processor (720) can adjust the receiving beams by changing all previous receiving beams (1205 and 1206) for the Pcell (1201) and / or Scell ​​(1202 and 1203) set in the electronic device (701) to other receiving beams (1207 and 1208). For example, if it is determined that the PDCCH received through a plurality of Scells is missing, the receiving beams for all of the plurality of Scells can be adjusted at once.

[0280] According to one embodiment, the processor (720) can adjust the receiving beam by re-performing the reference signal measurement and determining a new best receiving beam based thereon, or adjust the receiving beam to a different receiving beam based on a previously performed RS measurement. For example, the processor (720) can change the receiving beam to the next best receiving beam after the best receiving beam determined through the previous RS measurement.

[0281] According to one embodiment, the processor (720) can monitor the PDCCH received through the next slot using the receiving beam (1207 or 1208) adjusted according to the receiving beam adjustment.

[0282] According to one embodiment, the processor (720) can monitor the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and can update the value of the DAI field received through the PDCCH and monitor the PDCCH reception.

[0283] According to one embodiment, the processor (720) monitors the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and updates the total DAI value and counter DAI value among the values ​​of the DAI field received through the PDCCH, and monitors the PDCCH reception.

[0285] FIG. 13 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment.

[0286] Referring to FIG. 13, according to various embodiments, a processor (e.g., processor (720) of FIG. 7 or FIG. 8) of an electronic device (e.g., user terminal (115) of FIG. 1, electronic device (701) of FIG. 7 or FIG. 8) may adjust the receiving beam of at least one antenna (e.g., first antenna module (842), second antenna module (844) and / or third antenna module (846) of FIG. 8) to receive a signal from a network (e.g., base station (gNB (110) or eNB (130)) of FIG. 1 or FIG. 2, or second network (799) of FIG. 7 or FIG. 8).

[0287] According to one embodiment, the electronic device (701) may have a Pcell (1301) and a plurality of Scells (e.g., Scell ​​71 (1302) and Scell ​​72 (1303)) configured according to Carrier Aggregation (CA) in a wireless communication system. Depending on whether cross-carrier scheduling is configured, the processor (720) may receive a PDCCH containing a DCI (downlink control information) format from the base station (110) through a control resource set (CORESET) of the downlink control channel of the Pcell (1301) and / or Scell ​​(1302 and / or 1303). For example, among the three carriers, the Pcell may be configured in a band below 6 GHz (below 6-GHz) and the Scell ​​may be configured in a band above 6 GHz (above 6-GHz), but is not limited thereto, and each serving cell may be configured in various ways above or below 6 GHz. For example, among the three carriers, if Pcell uses subcarrier spacing of 30 kHz in the frequency band below 6 GHz and Scell ​​uses subcarrier spacing of 60 kHz in the frequency band above 6 GHz, then while one slot is received in Pcell, two slots can be received in Scell.

[0288] According to one embodiment, the processor (720) can check PDCCH scheduling information received through the control area of ​​the downlink control channel of Pcell (1301) and Scell ​​(1302 and 1303) by checking the values ​​(1310 and 1320) of the DAI field included in the DCI format received through the control area of ​​the downlink control channel of at least one cell among Pcell (1301) and Scell ​​(1302 and 1303) set in the electronic device (701).

[0289] According to one embodiment, the processor (720) can determine the total number of DAI fields to be received during a specified time by checking the counter DAI value and / or total DAI value included in the first DAI field received from the Pcell (1301) during a specified time or a specified unit time.

[0290] According to one embodiment, the processor (720) can check each DAI field having the same total DAI value received from Pcell (1301) or Scell ​​(1302 or 1303) during a 'specified time' or 'specified unit time' to check if there is a missing DAI field as the included counter DAI value sequentially reaches the total DAI value.

[0291] According to one embodiment, the processor (720) can estimate a missing DAI field value based on other DAI field values ​​received during a 'specified time' or 'specified unit time', and can determine that the PDCCH containing the missing DAI field is missing due to a detection failure or loss (PDCCH detection failure or PDCCH lost).

[0292] Referring to the drawing, the DAI field may include two fields, including a counter DAI value (1310) and a total DAI value (1320).

[0293] According to one embodiment, the processor (720) may monitor the PDCCH for a 'specified time' or a 'specified unit time'. The processor (720) may monitor the PDCCH for, for example, the time during which one slot of the Pcell (1301) is received.

[0294] According to one embodiment, the processor (720) can monitor the received PDCCH during the time when the second slot (1304) of the Pcell (1301) is received, for example, to detect a DAI field from the PDCCH received through the Pcell (1301). The processor (720) can detect the DAI field value and confirm that the total DAI value (1320) is 7 and the counter DAI value (1310) is 5, and accordingly, during the time when the second slot (1304) is received, a DAI field having the same total DAI value and counter DAI values ​​of 6 and 7, which are increased by 1 from 5, in this example (6,7) and (7,7) as field values ​​will be received through the PDCCH of Scell ​​71 (1302) and / or Scell ​​72 (1303).

[0295] According to one embodiment, the processor (720) monitors the PDCCH during the time when the second slot (1304) of the Pcell is received, and checks the value of the DAI field received until the time when the reception of the second slot (1304) is completed. If the DAI field having a value of (6,7) and / or the DAI field having a value of (7,7) is not received, the processor may determine that the PDCCH (1330) and / or the PDCCH (1340) containing the DAI field (6,7) and / or (7,7) is missing.

[0296] According to one embodiment, the processor (720) can confirm (1350) that a PDCCH (1330) containing DAI field values ​​(6,7) is missing, and thereby confirm the occurrence of a specified event. For example, if the importance of the running application is high, the threshold value may be set low, and it may be determined that a specified event has occurred when a condition is met in which DCIs greater than or equal to the threshold value (e.g., one or more) among the total DCIs are not received. Or the opposite may be possible.

[0297] According to one embodiment, the processor (720) can change the current receiving beam set for at least one antenna (e.g., the first antenna module (842), the second antenna module (844), and / or the third antenna module (846) of FIG. 8) to another receiving beam. According to one embodiment, the processor (720) can adjust the receiving beam by changing the previous receiving beams (1305 and 1306) for the Pcell (1301) and / or Scell ​​(1302 and 1303) set for the electronic device (701) to other receiving beams (1307 and 1308).

[0298] According to one embodiment, the processor (720) can adjust the receiving beam by re-performing the reference signal measurement and determining a new best receiving beam based thereon, or adjust the receiving beam to a different receiving beam based on a previously performed RS measurement. For example, the processor (720) can change the receiving beam to the next best receiving beam after the best receiving beam determined through the previous RS measurement.

[0299] According to one embodiment, the processor (720) can monitor the PDCCH received through the next slot using the receiving beam (1307 or 1308) adjusted according to the receiving beam adjustment.

[0300] According to one embodiment, the processor (720) can monitor the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and can update the value of the DAI field received through the PDCCH and monitor the PDCCH reception.

[0301] According to one embodiment, the processor (720) monitors the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and updates the total DAI value and counter DAI value among the values ​​of the DAI field received through the PDCCH, and monitors the PDCCH reception.

[0303] FIG. 14 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment.

[0304] Referring to FIG. 14, according to various embodiments, a processor (e.g., processor (720) of FIG. 7 or FIG. 8) of an electronic device (e.g., user terminal (115) of FIG. 1, electronic device (701) of FIG. 7 or FIG. 8) may adjust the receiving beam of at least one antenna (e.g., first antenna module (842), second antenna module (844) and / or third antenna module (846) of FIG. 8) to receive a signal from a network (e.g., base station (gNB (110) or eNB (130)) of FIG. 1 or FIG. 2, or second network (799) of FIG. 7 or FIG. 8).

[0305] According to one embodiment, the electronic device (701) may have a Pcell (1401) and a plurality of Scells (e.g., Scell ​​71 (1402) and Scell ​​72 (1403)) configured according to Carrier Aggregation (CA) in a wireless communication system. Depending on whether cross-carrier scheduling is configured, the processor (720) may receive a PDCCH containing a DCI (downlink control information) format from the base station (110) through a control resource set (CORESET) of the downlink control channel of the Pcell (1401) and / or Scell ​​(1402 and / or 1403). For example, among the three carriers, the Pcell may be configured in a band below 6 GHz (below 6-GHz) and the Scell ​​may be configured in a band above 6 GHz (above 6-GHz), but is not limited thereto, and each serving cell may be configured in various ways above or below 6 GHz. For example, among the three carriers, if Pcell uses subcarrier spacing of 30 kHz in the frequency band below 6 GHz and Scell ​​uses subcarrier spacing of 60 kHz in the frequency band above 6 GHz, then while one slot is received in Pcell, two slots can be received in Scell.

[0306] According to one embodiment, the processor (720) can check PDCCH scheduling information received through the control area of ​​the downlink control channel of Pcell (1401) and Scell ​​(1402 and 1403) by checking the values ​​(1410 and 1420) of the DAI field included in the DCI format received through the control area of ​​the downlink control channel of at least one cell among Pcell (1401) and Scell ​​(1402 and 1403) set in the electronic device (701).

[0307] According to one embodiment, the processor (720) can determine the total number of DAI fields to be received during a specified time by checking the counter DAI value and / or total DAI value included in the first DAI field received from the Pcell (1401) during a specified time or a specified unit time.

[0308] According to one embodiment, the processor (720) can check each DAI field having the same total DAI value received from Pcell (1401) or Scell ​​(1402 or 1403) during a 'specified time' or 'specified unit time' to check if there is a missing DAI field as the included counter DAI value sequentially reaches the total DAI value.

[0309] According to one embodiment, the processor (720) can estimate a missing DAI field value based on other DAI field values ​​received during a 'specified time' or 'specified unit time', and can determine that the PDCCH containing the missing DAI field is missing due to a detection failure or loss (PDCCH detection failure or PDCCH lost).

[0310] Referring to the drawing, the DAI field may include two fields, including a counter DAI value (1410) and a total DAI value (1420).

[0311] According to one embodiment, the processor (720) may monitor the PDCCH for a 'specified time' or a 'specified unit time'. The processor (720) may monitor the PDCCH for, for example, the time during which one slot of the Pcell (1401) is received.

[0312] According to one embodiment, the processor (720) can monitor the received PDCCH during the time when the second slot (1404) of the Pcell (1401) is received, for example, to detect a DAI field from the PDCCH received through the Pcell (1401). The processor (720) can detect the DAI field value and confirm that the total DAI value (1410) is 7 and the counter DAI value (1420) is 5, and accordingly, during the time when the second slot (1404) is received, a DAI field having the same total DAI value and counter DAI values ​​of 6 and 7, which are increased by 1 from 5, in this example (6,7) and (7,7) as field values ​​will be received through the PDCCH of Scell ​​71 (1402) and / or Scell ​​72 (1403).

[0313] According to one embodiment, the processor (720) monitors the PDCCH during the time the second slot (1404) of the Pcell is received, and checks the value of the DAI field received until the reception of the second slot (1404) is completed, and can determine that the PDCCH (1430) containing the DAI field having the value of (6,7) is missing.

[0314] According to one embodiment, the processor (720) can confirm (1450) that a PDCCH (1430) containing DAI field values ​​(6, 7) is missing, but unlike the embodiment described with reference to FIG. 13, it can confirm that a specified event has not occurred. For example, if the importance of the running application is low, the threshold value may be set high, and it may be determined that a specified event has not occurred because a condition is met where DAIs exceeding the threshold value (e.g., two or more) are not received among the total DAIs. Or the opposite may be possible.

[0315] According to one embodiment, the processor (720) may maintain the current receiving beam set for at least one antenna (e.g., the first antenna module (842), the second antenna module (844), and / or the third antenna module (846) of FIG. 8) without changing it. According to one embodiment, the processor (720) may manage the receiving beams to maintain the previous receiving beams (1405 and 1406) for the Pcell (1401) and Scell ​​(1402 and 1403) set for the electronic device (701) as the same receiving beams (1405 and 1406).

[0316] According to one embodiment, the processor (720) can monitor the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and can update the value of the DAI field received through the PDCCH and monitor the PDCCH reception.

[0317] According to one embodiment, the processor (720) monitors the PDCCH received during the next 'specified time' or 'specified unit time' using the receiving beam adjusted according to the receiving beam adjustment, and updates the total DAI value and counter DAI value among the values ​​of the DAI field received through the PDCCH, and monitors the PDCCH reception.

[0319] FIG. 15 is a diagram illustrating a DAI-based receiving beam management method according to one embodiment.

[0320] Referring to FIG. 15, according to various embodiments, a processor (e.g., processor (720) of FIG. 7 or FIG. 8) of an electronic device (e.g., user terminal (115) of FIG. 1, electronic device (701) of FIG. 7 or FIG. 8) may adjust the receiving beam of at least one antenna (e.g., first antenna module (842), second antenna module (844) and / or third antenna module (846) of FIG. 8) to receive a signal from a network (e.g., base station (gNB (110) or eNB (130)) of FIG. 1 or FIG. 2, or second network (799) of FIG. 7 or FIG. 8).

[0321] According to one embodiment, the electronic device (701) may have a Pcell (1501) and a plurality of Scells (e.g., Scell ​​71 (1502) and Scell ​​72 (1503)) configured according to Carrier Aggregation (CA) in a wireless communication system. Depending on whether cross-carrier scheduling is configured, the processor (720) may receive a PDCCH containing a DCI (downlink control information) format from the base station (110) through a control resource set (CORESET) of the downlink control channel of the Pcell (1501) and / or Scell ​​(1502 and / or 1503). For example, among the three carriers, the Pcell may be configured in a band below 6 GHz (below 6-GHz) and the Scell ​​may be configured in a band above 6 GHz (above 6-GHz), but is not limited thereto, and each serving cell may be configured in various ways above or below 6 GHz. For example, among the three carriers, if Pcell uses subcarrier spacing of 30 kHz in the frequency band below 6 GHz and Scell ​​uses subcarrier spacing of 60 kHz in the frequency band above 6 GHz, then while one slot is received in Pcell, two slots can be received in Scell.

[0322] According to one embodiment, the processor (720) can check PDCCH scheduling information received through the control area of ​​the downlink control channel of each Pcell (1501) and Scell ​​(1502 and 1503) by checking the values ​​(1510 and 1520) of the DAI field included in the DCI format received through the control area of ​​the downlink control channel of the Pcell (1501) and Scell ​​(1502 and 1503) set in the electronic device (701).

[0323] According to one embodiment, the processor (720) may set the receiving beams for receiving the PDCCH of Scell ​​71 (1502) and Scell ​​72 (1503) differently as a first receiving beam (1505) and a second receiving beam (1506), respectively. The processor (720) may receive the PDCCH of Scell ​​71 (1502) using the first receiving beam (1505) during the first and second slot receiving times of the Pcell, and may receive the PDCCH of Scell ​​72 (1503) using the second receiving beam (1506) during the same time.

[0324] Referring to the drawing, the DAI field may include two fields, including a counter DAI value (1510) and a total DAI value (1520).

[0325] According to one embodiment, the processor (720) monitors the received PDCCH during the time when the second slot (1504) of the Pcell (1501) is received, for example, and detects the DAI field from the PDCCH received through the Pcell (1501) to confirm that the total DAI value (1520) is 7 and the counter DAI value (1510) is 5, and accordingly, during the time when the second slot (1504) is received, a DAI field having the same total DAI value and counter DAI values ​​of 6 and 7, which are increased by 1 from 5, in this example (6,7) and (7,7) as field values ​​will be received through the PDCCH of Scell ​​71 (1501) and / or Scell ​​72 (1503).

[0326] According to one embodiment, the processor (720) monitors the PDCCH during the time when the second slot (1504) of the Pcell is received, and checks the value of the DAI field received until the time when the reception of the second slot (1504) is completed, and can confirm that the DAI field having the value of (6,7) is not received, and accordingly, can determine that the PDCCH (1530) containing the DAI field (6,7) is missing.

[0327] According to one embodiment, the processor (720) can separately monitor the reception of PDCCH of Scell ​​71 (1502) and Scell ​​72 (1503). The processor (720) can confirm (1550) that the PDCCH (1530) is missing in the control area of ​​Scell ​​71 (1502).

[0328] According to one embodiment, the processor (720) can confirm (1550) that the PDCCH (1530) containing the DAI field values ​​(6,7) is missing, and accordingly, can confirm that the specified event for Scell ​​71 (1502) has occurred.

[0329] According to one embodiment, the processor (720) can change the first receiving beam (1505) for Scell ​​71 (1502) where the PDCCH (1530) is missing among the current receiving beams set for at least one antenna (e.g., the first antenna module (842), the second antenna module (844), and / or the third antenna module (846) of FIG. 8) to another third receiving beam (1507). For example, the processor (720) can adjust the receiving beam by re-performing the reference signal measurement and determining a new best receiving beam based thereon, or adjust the receiving beam to a different receiving beam based on a previously performed reference signal measurement. For example, the processor (720) can change the receiving beam to the next best receiving beam after the best receiving beam determined through the previous reference signal measurement.

[0330] According to one embodiment, the processor (720) can maintain the same second receiving beam (1506) for the Scell ​​72 (1503) set in the electronic device (701) without changing the current second receiving beam (1506).

[0331] According to one embodiment, the processor (720) can monitor the PDCCH received through the next slot using the receiving beam (1507) adjusted according to the receiving beam adjustment.

[0332] The embodiments disclosed in this document are presented merely as examples to facilitate the explanation and understanding of the technical content and are not intended to limit the scope of the technology disclosed herein. Accordingly, the scope of the technology disclosed in this document should be interpreted to include all modifications or variations derived based on the technical concepts of the various embodiments disclosed herein, in addition to the embodiments disclosed herein.

Claims

Claim 1 An electronic device comprising: one or more antennas; a communication circuit; and a processor operatively connected to the communication circuit; wherein the processor is configured to monitor a physical downlink control channel (PDCCH) from a base station for a specified time based on a control area setting of a downlink control channel of at least one serving cell, check a downlink assignment index (DAI) field included in the PDCCH received through the monitoring, and, if a specified event occurs determined based on the result of checking the DAI field, whether the PDCCH is missing during the specified time, adjust at least some of the receiving beams of the one or more antennas for at least some of the at least one serving cell. Claim 2 An electronic device according to claim 1, wherein the specified event comprises at least one of an event in which the number of missing PDCCHs during the specified time exceeds a threshold value or an event in which the PDCCHs are continuously missing. Claim 3 An electronic device according to paragraph 2, wherein the threshold value is set based on conditions including at least one of a received signal strength, a received beam width, a service type, or a characteristic of an application being executed. Claim 4 An electronic device according to claim 1, wherein the DAI field includes a counter DAI value and a total DAI value, and the processor is configured to determine whether the DCI is received by checking the existence of the DAI field values ​​based on the counter DAI values ​​for the values ​​of the DAI field including the same total DAI value included in each of the DCIs received during the specified time. Claim 5 An electronic device according to claim 4, wherein the processor is configured to check for the existence of a corresponding DAI field by increasing the counter DAI value one by one for the DAI fields containing the same total DAI value during the specified time until it becomes equal to the total DAI value. Claim 6 delete Claim 7 An electronic device configured such that, in the case where the at least one serving cell includes two or more Scells (secondary cells), the processor determines whether the specified event occurs for each of the two or more Scells based on each of the information included in the DAI field of the DCI received during the specified time in the control area of ​​each of the two or more Scells, and separately adjusts the receiving beam for the Scell ​​among the two or more Scells where the specified event occurred. Claim 8 delete Claim 9 In claim 1, the processor is an electronic device configured to re-perform RS measurement and perform the receiving beam adjustment based thereon. Claim 10 delete Claim 11 A method of an electronic device comprising: an operation of monitoring a physical downlink control channel (PDCCH) from a base station for a specified time based on the setting of a control area of ​​a downlink control channel of at least one serving cell; an operation of checking a downlink assignment index (DAI) field included in the PDCCH received through the monitoring; and an operation of adjusting at least some of the receiving beams of one or more antennas for at least some of the at least one serving cell when a specified event occurs, which is determined based on whether the PDCCH is missing during the specified time based on the result of checking the DAI field. Claim 12 In claim 11, the specified event comprises at least one of an event in which the number of missing PDCCHs during the specified time exceeds a threshold value or an event in which the PDCCHs are continuously missing, and the threshold value is set based on conditions including at least one of a received signal strength, a received beam width, a service type, or a characteristic of a running application. Claim 13 delete Claim 14 In claim 11, the DAI field includes a counter DAI value and a total DAI value, and the verification operation is a method for verifying whether the DCI is received by verifying the existence of the DAI field values ​​by increasing the counter DAI value by one for each of the DCIs received during the specified time, and for the values ​​of the DAI field including the same total DAI value, until the counter DAI value becomes equal to the total DAI value, and verifying whether the corresponding DAI field exists. Claim 15 delete Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 delete Claim 20 delete

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