WO2020204533A1 - Method, user equipment, device, and storage medium for performing uplink transmission, and method and base station for performing uplink reception - Google Patents

Abstract

According to an aspect of the present disclosure, a method for transmitting an uplink signal by a user equipment in a wireless communication system comprises: receiving a physical downlink control channel (PDCCH) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs); receiving the plurality of SPS PDSCHs on the basis of the PDCCH; and transmitting an HARQ-ACK response for the plurality of SPS PDSCHs via an uplink resource, wherein the PDCCH activates the plurality of SPS PDSCHs.

Description

Method for performing uplink transmission, user equipment, device, storage medium, method for performing uplink reception, and base station

The present disclosure relates to a wireless communication system.

Various devices and technologies such as smart phones and tablet PCs (Personal Computers) that require high data transmission, such as machine-to-machine (M2M) communication, machine type communication (MTC), etc. have appeared and spread. have. Accordingly, the amount of data required to be processed in a cellular network is increasing very rapidly. In order to satisfy such rapidly increasing data processing requirements, carrier aggregation technology, cognitive radio technology, etc. to efficiently use more frequency bands, etc., increase the data capacity transmitted within a limited frequency. Multi-antenna technology, multi-base station cooperation technology, etc. are developing.

As more communication devices require larger communication capacity, there is a need for enhanced mobile broadband (eMBB) communication compared to legacy radio access technology (RAT). In addition, massive machine type communication (mMTC) for providing various services anytime, anywhere by connecting a plurality of devices and objects to each other is one of the major issues to be considered in next-generation communication.

In addition, a discussion on a communication system to be designed in consideration of a service/user equipment (UE) sensitive to reliability and latency is ongoing. The introduction of next generation wireless access technology is being discussed in consideration of eMBB communication, mMTC, ultra-reliable and low latency communication (URLLC), and the like.

With the introduction of new wireless communication technology, not only the number of UEs to which the base station has to provide services in a predetermined resource area increases, but also the amount of data and control information transmitted/received with the UEs that the base station provides service Is increasing. Since the amount of radio resources available for the base station to communicate with the UE(s) is finite, the base station transmits up/downlink data and/or up/downlink control information to/from the UE(s) using finite radio resources. A new scheme for efficient reception/transmission is required. In other words, as the density of the node increases and/or the density of the UE increases, there is a need for a method for efficiently using high density nodes or high density user devices for communication.

In addition, there is a need for a method to efficiently support various services having different requirements in a wireless communication system.

In addition, overcoming delay or latency is an important challenge for applications where performance is sensitive to delay/latency.

The technical problems to be achieved in the various examples of the present disclosure are not limited to the matters mentioned above, and other technical problems that are not mentioned are to those of ordinary skill in the art from various examples of the present disclosure to be described below. Can be considered by

Various examples of the present disclosure may provide a method of transmitting and receiving a signal in a wireless communication system and an apparatus supporting the same.

In an aspect of the present disclosure, in a method for a user equipment to transmit an uplink signal in a wireless communication system, a physical downlink control channel (PDCCH) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) Receive; Receiving the plurality of SPS PDSCHs based on the PDCCH; And a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource, and the PDCCH is an uplink signal transmission method for activating the plurality of SPS PDSCHs.

In another aspect of the present disclosure, an apparatus for a user equipment in a wireless communication system, comprising: at least one processor; And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include: a plurality of Receive a PDCCH (physical downlink control channel) for semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs); Receiving the plurality of SPS PDSCHs based on the PDCCH; And a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource, and the PDCCH is an apparatus for activating the plurality of SPS PDSCHs.

In another aspect of the present disclosure, a user equipment for transmitting an uplink signal in a wireless communication system, comprising: at least one transceiver; At least one processor; And at least one memory (memory) operatively connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include: a plurality of Receive a PDCCH (physical downlink control channel) for semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs); Receiving the plurality of SPS PDSCHs based on the PDCCH; And a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource, and the PDCCH is a user equipment that activates the plurality of SPS PDSCHs.

In yet another aspect of the disclosure, a computer-readable storage medium, wherein the computer-readable storage medium, when executed by at least one or more processors, causes the at least one or more processors to perform operations for a user device. Stores at least one computer program including the above instructions, and the operations are: Receive a PDCCH (physical downlink control channel) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) and; Receiving the plurality of SPS PDSCHs based on the PDCCH; And a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource, and the PDCCH is a computer-readable storage medium for activating the plurality of SPS PDSCHs.

In another aspect of the present disclosure, in a method for a base station to receive an uplink signal in a wireless communication system, a physical downlink control channel (PDCCH) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs) ) To send; Transmitting the plurality of SPS PDSCHs based on the PDCCH; And a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource, and the PDCCH is an uplink signal reception method for activating the plurality of SPS PDSCHs.

In yet another aspect of the present disclosure, a base station for receiving an uplink signal in a wireless communication system, comprising: at least one processor; And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include: a plurality of Transmits a PDCCH (physical downlink control channel) for semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs); Transmitting the plurality of SPS PDSCHs based on the PDCCH; And a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource, and the PDCCH is a base station that activates the plurality of SPS PDSCHs.

The uplink resource may be indicated by the PDCCH based on the HARQ-ACK response being associated with the first SPS PDSCH received in the time domain among the plurality of SPS PDSCHs.

The plurality of SPS PDSCHs are associated with a plurality of SPS settings, wherein each of the plurality of SPS settings includes information on a period in which the SPS PDSCH is received, and the HARQ-ACK response is received first in the periods. Based on the SPS associated with the PDSCH, the uplink resource may be indicated by the PDCCH.

The uplink resource may be configured through radio resource control (RRC) signaling.

The plurality of SPS PDSCHs are associated with a plurality of SPS settings, wherein each of the plurality of SPS settings includes information on a period in which the SPS PDSCH is received, and the HARQ-ACK response is received first in the periods. The uplink resource may be determined based on a predetermined downlink resource and the PDCCH among downlink resources associated with the SPS PDSCH received first in the periods, based on the associated SPS PDSCH.

The predetermined downlink resource may be located first in the time domain among the downlink resources associated with the SPS PDSCH received first in the periods.

The above problem solving methods are only some of the various examples of the present disclosure, and various examples reflecting the technical features of the present disclosure may be derived and understood based on the following detailed description by a person having ordinary knowledge in the art. have.

According to various examples of the present disclosure, a wireless communication signal may be efficiently transmitted/received. Accordingly, the overall throughput of the wireless communication system can be increased.

In addition, various services having different requirements can be efficiently supported in a wireless communication system.

Further, a delay/latency occurring during wireless communication between communication devices may be reduced.

The effects according to the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those of ordinary skill in the art related to the present disclosure from the following detailed description. .

The accompanying drawings are provided to aid understanding of various examples of the present disclosure, and provide various examples of the present disclosure together with a detailed description. However, the technical features of various examples of the present disclosure are not limited to a specific drawing, and features disclosed in each drawing may be combined with each other to constitute a new example. Reference numerals in each drawing refer to structural elements.

1 shows an example of communication system 1 to which implementations of the present disclosure are applied.

2 is a block diagram illustrating examples of communication devices capable of performing a method according to the present disclosure.

3 illustrates another example of a wireless device capable of performing implementation(s) of the present disclosure.

4 is a diagram illustrating physical channels used in a communication system based on a 3rd generation partnership project (3GPP), which is an example of a wireless communication system, and a signal transmission/reception process using them.

5 illustrates a random access process that can be applied to the implementation(s) of the present disclosure.

6 illustrates a discontinuous reception (DRX) operation that may be applied to the implementation(s) of the present disclosure.

7 shows an example of a frame structure usable in a 3GPP-based wireless communication system.

8 illustrates a resource grid of a slot.

9 illustrates a slot structure that can be used in a 3GPP-based system.

10 illustrates an example of PDSCH time domain resource allocation by PDCCH and an example of PUSCH time domain resource allocation by PDCCH.

11 illustrates a hybrid automatic repeat request-acknowledgement (HARQ-ACK) transmission/reception process.

12 is a flowchart of a method of transmitting and receiving physical shared channels (PUSCH, PDSCH) according to an example of the present disclosure.

13 is a flowchart of an activation/deactivation operation for a plurality of set grants according to an example of the present disclosure.

14 illustrates quasi-static resources according to an example of the present disclosure.

15 is a flowchart of a method for transmitting an uplink signal by a user equipment according to an example of the present disclosure.

16 is a flowchart of a method for receiving an uplink signal by a base station according to an example of the present disclosure.

Hereinafter, implementations according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description to be disclosed below together with the accompanying drawings is intended to describe an exemplary implementation of the present disclosure, and is not intended to represent the only implementation form in which the present disclosure may be practiced. The detailed description below includes specific details to provide a thorough understanding of the present disclosure. However, one of ordinary skill in the art appreciates that the present disclosure may be practiced without these specific details.

In some cases, in order to avoid obscuring the concept of the present disclosure, well-known structures and devices may be omitted, or may be illustrated in a block diagram form centering on core functions of each structure and device. In addition, the same components will be described with the same reference numerals throughout the present disclosure.

The techniques, devices, and systems described below can be applied to various wireless multiple access systems. Examples of multiple access systems include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system. division multiple access) system, MC-FDMA (multi carrier frequency division multiple access) system, and the like. CDMA may be implemented in a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented in a radio technology such as Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Enhanced Data Rates for GSM Evolution (EDGE) (ie, GERAN). OFDMA may be implemented in wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (WiFi), IEEE 802.16 (WiMAX), IEEE802-20, and evolved-UTRA (E-UTRA). UTRA is a part of Universal Mobile Telecommunication System (UMTS), and 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of E-UMTS using E-UTRA. 3GPP LTE adopts OFDMA in downlink (DL) and SC-FDMA in uplink (UL). LTE-advanced (LTE-A) is an evolved form of 3GPP LTE.

For convenience of description, the following description will be made on the assumption that the present disclosure is applied to a 3GPP-based communication system, for example, LTE and NR. However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is described based on a mobile communication system corresponding to a 3GPP LTE/NR system, it can also be applied to any other mobile communication system, except for items specific to 3GPP LTE/NR. Do.

For terms and technologies that are not specifically described among terms and technologies used in the present disclosure, 3GPP LTE standard documents, for example, 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.300 and 3GPP TS 36.331 and the like, 3GPP NR standard documents, for example, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.321, 3GPP TS 38.331, and the like.

In the examples of the present disclosure to be described later, the expression "assumes" by the device may mean that the subject transmitting the channel transmits the channel so as to conform to the "assumption". The subject receiving the channel may mean that the channel is received or decoded in a form conforming to the “assuming” under the premise that the channel is transmitted to conform to the “assuming”.

In the present disclosure, that a channel is punctured in a specific resource means that the signal of the channel is mapped to the specific resource in the resource mapping process of the channel, but the signal portion mapped to the punctured resource is excluded when the channel is transmitted. It means that it is transmitted as it is. In other words, although the specific resource to be punctured is counted as the resource of the corresponding channel during the resource mapping process of the corresponding channel, the signal mapped to the specific resource among the signals of the corresponding channel is not actually transmitted. The receiving device of the corresponding channel receives, demodulates or decodes the corresponding channel assuming that the signal portion mapped to the punctured specific resource is not transmitted. On the other hand, when a channel is rate-matched in a specific resource, it means that the channel is not mapped to the specific resource at all in the resource mapping process of the channel, and thus is not used for transmission of the channel. In other words, the rate-matched specific resource is not counted as a resource of the corresponding channel at all during the resource mapping process of the corresponding channel. The receiving device of the corresponding channel receives, demodulates or decodes the corresponding channel, assuming that the rate-matched specific resource is not used for mapping and transmission of the corresponding channel at all.

In the present disclosure, the UE may be fixed or mobile, and various devices that transmit and/or receive user data and/or various control information by communicating with a base station (BS) belong to this. The UE includes (Terminal Equipment), MS (Mobile Station), MT (Mobile Terminal), UT (User Terminal), SS (Subscribe Station), wireless device, PDA (Personal Digital Assistant), and wireless modem. ), handheld device, etc. In addition, in the present disclosure, a BS generally refers to a fixed station that communicates with a UE and/or another BS, and exchanges various data and control information by communicating with the UE and other BSs. BS may be referred to as other terms such as ABS (Advanced Base Station), NB (Node-B), eNB (evolved-NodeB), BTS (Base Transceiver System), Access Point (Access Point), PS (Processing Server). In particular, the base station of UTRAN is called Node-B, the base station of E-UTRAN is called eNB, and the base station of new radio access technology network is called gNB. Hereinafter, for convenience of description, the base station is collectively referred to as a BS regardless of the type or version of the communication technology.

In the present disclosure, a node refers to a fixed point at which a radio signal can be transmitted/received by communicating with a UE. Various types of BSs can be used as nodes regardless of their name. For example, BS, NB, eNB, pico-cell eNB (PeNB), home eNB (HeNB), relay, repeater, and the like may be nodes. Also, the node may not have to be a BS. For example, it may be a radio remote head (RRH) or a radio remote unit (RRU). RRH, RRU, etc. generally have a power level lower than the power level of the BS. RRH or RRU or less, RRH/RRU) is generally connected to the BS by a dedicated line such as an optical cable, so RRH/RRU and BS are generally compared to cooperative communication by BSs connected by wireless lines. By cooperative communication can be performed smoothly. At least one antenna is installed in one node. The antenna may mean a physical antenna, or an antenna port, a virtual antenna, or an antenna group. Nodes are also called points.

In the present disclosure, a cell refers to a certain geographic area in which one or more nodes provide communication services. Accordingly, in the present disclosure, communication with a specific cell may mean communication with a BS or a node that provides a communication service to the specific cell. In addition, the downlink/uplink signal of a specific cell means a downlink/uplink signal from/to a BS or a node that provides a communication service to the specific cell. A cell that provides uplink/downlink communication services to a UE is specifically referred to as a serving cell. In addition, the channel state/quality of a specific cell refers to a channel state/quality of a channel or communication link formed between a BS or a node and a UE providing a communication service to the specific cell. In the 3GPP-based communication system, the UE determines the downlink channel state from a specific node, CRS(s) transmitted on a CRS (Cell-specific Reference Signal) resource allocated to the specific node by the antenna port(s) of the specific node, and / Or it can be measured using CSI-RS(s) transmitted on a Channel State Information Reference Signal (CSI-RS) resource.

Meanwhile, the 3GPP-based communication system uses the concept of a cell to manage radio resources, and a cell associated with a radio resource is distinguished from a cell in a geographic area.

The “cell” in the geographic area may be understood as coverage in which a node can provide a service using a carrier, and the “cell” of a radio resource is a bandwidth (a frequency range configured by the carrier). bandwidth, BW). Since downlink coverage, which is a range in which a node can transmit a valid signal, and uplink coverage, which is a range in which a valid signal can be received from a UE, is dependent on the carrier that carries the signal, the node's coverage is used by the node. It is also associated with the coverage of the "cell" of the radio resource to be used. Therefore, the term "cell" can sometimes be used to mean coverage of a service by a node, sometimes a radio resource, and sometimes a range within which a signal using the radio resource can reach a valid strength.

Meanwhile, the 3GPP communication standard uses the concept of a cell to manage radio resources. The term "cell" associated with radio resources is defined as a combination of downlink resources (DL resources) and uplink resources (UL resources), that is, a combination of a DL component carrier (CC) and a UL CC. . The cell may be configured with a DL resource alone or a combination of a DL resource and a UL resource. When carrier aggregation is supported, the linkage between the carrier frequency of the DL resource (or, DL CC) and the carrier frequency of the UL resource (or UL CC) is indicated by system information Can be. For example, a combination of a DL resource and a UL resource may be indicated by a system information block type 2 (SIB2) linkage. Here, the carrier frequency may be the same as or different from the center frequency of each cell or CC. When carrier aggregation (CA) is configured, the UE has only one radio resource control (RRC) connection with the network. One serving cell provides non-access stratum (NAS) mobility information at RRC connection establishment/re-establishment/handover, and one serving cell Provides a security input when re-establishing an RRC connection/handover. Such cells are referred to as primary cells (Pcell). The Pcell is a cell operating on a primary frequency at which the UE performs an initial connection establishment procedure or initiates a connection re-establishment procedure. Depending on the UE capability, secondary cells (Scells) may be configured to form a set of serving cells together with the Pcell. Scell is a cell that can be set after RRC (Radio Resource Control) connection establishment is made, and provides additional radio resources in addition to the resources of a special cell (SpCell). In downlink, a carrier corresponding to a Pcell is called a downlink primary CC (DL PCC), and a carrier corresponding to a Pcell in uplink is called a UL primary CC (DL PCC). A carrier corresponding to the Scell in downlink is referred to as a DL secondary CC (DL SCC), and a carrier corresponding to the Scell in uplink is referred to as a UL secondary CC (UL SCC).

In the case of dual connectivity (DC) operation, the term SpCell refers to a Pcell of a master cell group (MCG) or a Pcell of a secondary cell group (SCG). SpCell supports PUCCH transmission and contention-based random access, and is always activated. The MCG is a group of serving cells associated with a master node (eg, BS) and consists of SpCell (Pcell) and optionally (optionally) one or more Scells. For a UE configured as DC, the SCG is a subset of serving cells associated with the secondary node, and consists of a PSCell and zero or more Scells. In the case of a UE in the RRC_CONNECTED state that is not set to CA or DC, there is only one serving cell composed of only Pcell. In the case of a UE in the RRC_CONNECTED state set to CA or DC, the term serving cells refers to a set of cells consisting of SpCell(s) and all Scell(s). In DC, two MAC entities, one medium access control (MAC) entity for MCG and one MAC entity for SCG, are configured in the UE.

In a UE in which CA is configured and DC is not configured, a Pcell PUCCH group consisting of a Pcell and zero or more Scells and an Scell PUCCH group consisting of only Scell(s) may be configured. In the case of an Scell, an Scell (hereinafter referred to as a PUCCH cell) through which a PUCCH associated with a corresponding cell is transmitted may be configured. The Scell indicated by the PUCCH Scell belongs to the Scell PUCCH group, and the PUCCH transmission of the related UCI is performed on the PUCCH Scell, and the Scell whose PUCCH Scell is not indicated or the cell indicated as a PUCCH transmission cell is a Pcell belongs to the Pcell PUCCH group, and the PUCCH transmission of related UCI is performed on the Pcell.

In a wireless communication system, a UE receives information from a BS through a downlink (DL), and the UE transmits information to the BS through an uplink (UL). The information transmitted and/or received by the BS and the UE includes data and various control information, and various physical channels exist according to the type/use of the information they transmit and/or receive.

3GPP-based communication standards include downlink physical channels corresponding to resource elements carrying information originating from higher layers, and downlink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from higher layers. Link physical signals are defined. For example, a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), etc. are the downlink physical channels. It is defined, and a reference signal and a synchronization signal are defined as downlink physical signals. A reference signal (RS), also referred to as a pilot, refers to a signal of a predefined special waveform that the BS and the UE know each other. For example, a demodulation reference signal (DMRS), channel state information RS (channel state information RS, CSI-RS), etc. are defined as a downlink reference signal. 3GPP-based communication standards include uplink physical channels corresponding to resource elements carrying information originating from an upper layer, and uplink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from an upper layer. Link physical signals are defined. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are used as uplink physical channels. It is defined, and a demodulation reference signal (DMRS) for an uplink control/data signal, a sounding reference signal (SRS) used for uplink channel measurement, and the like are defined.

In the present disclosure, PDCCH (Physical Downlink Control CHannel) refers to a set of time-frequency resources (eg, resource elements) carrying Downlink Control Information (DCI), and PDSCH (Physical Downlink Shared CHannel) refers to downlink data. It means a set of time-frequency resources to carry. In addition, PUCCH (Physical Uplink Control CHannel), PUSCH (Physical Uplink Shared CHannel), PRACH (Physical Random Access CHannel) are each (respectively) UCI (Uplink Control Information), uplink data, time-frequency carrying a random access signal It means a collection of resources. Hereinafter, the expression that the user equipment transmits/receives PUCCH/PUSCH/PRACH is used in the same sense as transmitting/receiving uplink control information/uplink data/random access signals on or through PUSCH/PUCCH/PRACH, respectively. do. In addition, the expression that the BS transmits/receives PBCH/PDCCH/PDSCH is used in the same meaning as transmitting broadcast information/downlink data/downlink control information on or through PBCH/PDCCH/PDSCH, respectively.

As more communication devices require a larger communication capacity, there is a need for enhanced mobile broadband (eMBB) communication compared to the existing radio access technology (RAT). In addition, massive MTC (mMTC), which provides various services anytime, anywhere by connecting a number of devices and objects, is also one of the major issues to be considered in next-generation communication. In addition, a communication system design considering a service/UE sensitive to reliability and latency is being discussed. In this way, the introduction of the next-generation RAT considering eMBB, mMTC, and URLLC (Ultra-Reliable and Low Latency Communication) is being discussed. Currently, 3GPP is conducting a study on the next-generation mobile communication system after EPC. In the present disclosure, for convenience, a corresponding technology is referred to as a new RAT (NR) or 5G RAT, and a system using or supporting NR is referred to as an NR system.

1 shows an example of communication system 1 to which implementations of the present disclosure are applied. Referring to FIG. 1, a communication system 1 applied to the present disclosure includes a wireless device, a BS, and a network. Here, the wireless device refers to a device that performs communication using wireless access technology (eg, 5G NR (New RAT), LTE (eg, E-UTRA)), and may be referred to as a communication/wireless/5G device. . Although not limited thereto, wireless devices include robots 100a, vehicles 100b-1 and 100b-2, eXtended Reality (XR) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400. For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, including HMD (Head-Mounted Device), HUD (Head-Up Display), TV, smartphone, It can be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like. Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), computers (eg, notebook computers, etc.). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors, smart meters, and the like. For example, the BS and the network may be implemented as a wireless device, and a specific wireless device 200a may operate as a BS/network node to another wireless device.

The wireless devices 100a to 100f may be connected to the network 300 through the BS 200. AI (Artificial Intelligence) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300. The network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network. The wireless devices 100a to 100f may communicate with each other through the BS 200/network 300, but may perform direct communication (e.g. sidelink communication) without passing through the BS/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. V2V (Vehicle to Vehicle)/V2X (Vehicle to Everything) communication). In addition, the IoT device (eg, sensor) may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.

Wireless communication/ connections 150a and 150b may be achieved between the wireless devices 100a to 100f/BS 200 to the BS 200/wireless devices 100a to 100f. Here, wireless communication/connection may be performed through various wireless access technologies (eg, 5G NR) for uplink/downlink communication 150a and sidelink communication 150b (or D2D communication). Through wireless communication/ connection 150a and 150b, the wireless device and the BS/wireless device may transmit/receive wireless signals to each other. To this end, based on various proposals of the present disclosure, various configuration information setting processes for transmission/reception of radio signals, various signal processing processes (e.g., channel encoding/decoding, modulation/demodulation, resources) Mapping/demapping, etc.), resource allocation process, etc. may be performed.

2 is a block diagram illustrating examples of communication devices capable of performing a method according to the present disclosure. Referring to FIG. 2, the first wireless device 100 and the second wireless device 200 may transmit and/or receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, {the first wireless device 100, the second wireless device 200} is the {wireless device 100x, BS 200} and/or {wireless device 100x, wireless device 100x) of FIG. 1 } Can be matched.

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and/or one or more antennas 108. The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the functions, procedures, and/or methods described/suggested above. For example, the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a radio signal including the first information/signal through the transceiver 106. In addition, the processor 102 may store information obtained from signal processing of the second information/signal in the memory 104 after receiving a radio signal including the second information/signal through the transceiver 106. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including instructions for performing some or all of the processes controlled by the processor 102, or performing the previously described/suggested procedures and/or methods. . Here, the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 106 may be connected to the processor 102 and may transmit and/or receive radio signals through one or more antennas 108. The transceiver 106 may comprise a transmitter and/or a receiver. The transceiver 106 may be mixed with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may mean a communication modem/circuit/chip.

The second wireless device 200 includes one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208. The processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the functions, procedures, and/or methods described/suggested above. For example, the processor 202 may process information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206. In addition, the processor 202 may store information obtained from signal processing of the fourth information/signal in the memory 204 after receiving a radio signal including the fourth information/signal through the transceiver 206. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for performing some or all of the processes controlled by the processor 202, or performing the procedures and/or methods described/suggested above. . Here, the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 206 may be connected to the processor 202 and may transmit and/or receive radio signals through one or more antennas 208. The transceiver 206 may include a transmitter and/or a receiver. The transceiver 206 may be mixed with an RF unit. In the present disclosure, a wireless device may mean a communication modem/circuit/chip.

Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors 102, 202. For example, the one or more processors 102, 202 may include one or more layers (e.g., a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer). , A packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a functional layer such as a service data adaption protocol (SDAP)) may be implemented. One or more processors (102, 202) are one or more protocol data unit (protocol data unit (PDU)) and / or one or more service data unit (service data unit, SDU) according to the functions, procedures, proposals and / or methods disclosed in this document. ) Can be created. One or more processors 102 and 202 may generate messages, control information, data, or information according to functions, procedures, suggestions and/or methods disclosed herein. At least one processor (102, 202) is PDU, SDU, message, control information, data or signals containing information (e.g., baseband signals) in accordance with the functions, procedures, proposals and/or methods disclosed herein. Can be provided to one or more transceivers 106 and 206. One or more processors (102, 202) may receive signals (e.g., baseband signals) from one or more transceivers (106, 206), and PDU, SDU according to the functions, procedures, proposals and/or methods disclosed herein. , Messages, control information, data or information can be obtained.

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

One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions. One or more memories 104 and 204 may be composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium, and/or combinations thereof. One or more memories 104 and 204 may be located inside and/or outside of one or more processors 102 and 202. In addition, one or more memories 104, 204 may be connected to one or more processors 102, 202 through various technologies such as wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, control information, radio signals/channels, and the like mentioned in the methods and/or operation flow charts of this document to one or more other devices. The one or more transceivers 106 and 206 may receive user data, control information, radio signals/channels, and the like described in the functions, procedures, proposals, methods and/or operational flow charts disclosed herein from one or more other devices. For example, one or more transceivers 106, 206 may be coupled with one or more processors 102, 202, and may transmit and/or receive wireless signals. For example, one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. In addition, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), one or more transceivers (106, 206) through one or more antennas (108, 208) functions and procedures disclosed in this document. It may be configured to transmit and/or receive user data, control information, radio signals/channels, etc. mentioned in the proposal, method and/or operation flow chart. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). One or more transceivers (106, 206) in order to process the received user data, control information, radio signal / channel, etc. using one or more processors (102, 202), the received radio signal / channel, etc. in the RF band signal. It can be converted into a baseband signal. One or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 and 202 from a baseband signal to an RF band signal. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and/or filters.

3 illustrates another example of a wireless device capable of performing implementation(s) of the present disclosure. Referring to FIG. 3, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 2, and various elements, components, units/units, and/or modules It can be composed of (module). For example, the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit may include a communication circuit 112 and a transceiver(s) 114. For example, the communication circuit 112 may include one or more processors 102 and 202 and/or one or more memories 104 and 204 of FIG. 2. For example, the transceiver(s) 114 may include one or more transceivers 106, 206 and/or one or more antennas 108, 208 of FIG. 2. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls all operations of the wireless device. For example, the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to an external (eg, other communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130.

The additional element 140 may be variously configured according to the type of wireless device. For example, the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit, and a computing unit. Although not limited to this, wireless devices include robots (Fig. 1, 100a), vehicles (Fig. 1, 100b-1, 100b-2), XR equipment (Fig. 1, 100c), portable equipment (Fig. 1, 100d), and home appliances. (Fig. 1, 100e), IoT device (Fig. 1, 100f), digital broadcast UE, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment It may be implemented in the form of a device, an AI server/device (Fig. 1, 400), a BS (Fig. 1, 200), and a network node. The wireless device can be used in a mobile or fixed location depending on the use-example/service.

In FIG. 3, various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least some may be wirelessly connected through the communication unit 110. For example, in the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130, 140) are connected through the communication unit 110. Can be connected wirelessly. In addition, each element, component, unit/unit, and/or module in the wireless device 100 and 200 may further include one or more elements. For example, the controller 120 may be configured with one or more processor sets. For example, the control unit 120 may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, and a memory control processor. As another example, the memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.

In the present disclosure, at least one memory (e.g., 104 or 204) may store instructions or programs, and the instructions or programs are at least operably connected to the at least one memory when executed. It may cause one processor to perform operations according to some examples or implementations of the present disclosure.

In the present disclosure, a computer readable storage medium may store at least one instruction or computer program, and the at least one instruction or computer program is executed by at least one processor. It may cause one processor to perform operations according to some examples or implementations of the present disclosure.

In the present disclosure, a processing device or apparatus may include at least one processor and at least one computer memory connectable to the at least one processor. The at least one computer memory may store instructions or programs, and the instructions or programs, when executed, cause at least one processor operably connected to the at least one memory to cause some of the present disclosure. It may be to perform operations according to examples or implementations.

4 illustrates physical channels used in a 3GPP-based communication system, which is an example of a wireless communication system, and a signal transmission/reception process using them.

The UE, which has been powered on again while the power is turned off, or disconnected from the wireless communication system, first searches for a suitable cell to camp on (search cell) and synchronizes with the cell or the BS of the cell, etc. An initial cell search process is performed (S11). In the initial cell search process, the UE receives a synchronization signal block (SSB) (also referred to as an SSB/PBCH block) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE synchronizes with the base station based on the PSS/SSS and obtains information such as a cell identifier (identity, ID). In addition, the UE may obtain intra-cell broadcast information based on the PBCH. Meanwhile, the UE may receive a downlink reference signal (DL RS) during an initial cell search process to check a downlink channel state.

After completing the initial cell search, the UE can camp on the corresponding cell. After camping on the cell, the UE monitors the PDCCH on the cell and receives the PDSCH according to the downlink control information (DCI) carried by the PDCCH to obtain more specific system information (SI). Can be (S12).

SI is divided into a master information block (MIB) and a plurality of system information blocks (SIB). A brief description of MIBs and SIBs is as follows.

-The MIB includes information/parameters related to system information block type 1 (SystemInformationBlockType1, SIB1) reception and is transmitted through PBCH in SSB. Upon initial cell selection, the UE assumes that the half-frame with SSB is repeated in a 20ms period. The UE may check whether there is a control resource set (CORESET) for the Type0-PDCCH common search space based on the MIB. The Type0-PDCCH common search space is a kind of PDCCH search space, and is used to transmit a PDCCH for scheduling SI messages. If there is a Type0-PDCCH common search space, the UE based on information in the MIB (e.g., pdcch-ConfigSIB1) (i) a plurality of consecutive RBs constituting CORESET and one or more consecutive symbols and (ii) PDCCH opportunity (That is, a time domain location for PDCCH reception) can be determined. When the Type0-PDCCH common search space does not exist, pdcch-ConfigSIB1 provides information on a frequency location in which SSB/SIB1 exists and a frequency range in which SSB/SIB1 does not exist.

-SIB1 includes information related to availability and scheduling (eg, transmission period, SI-window size) of the remaining SIBs (hereinafter, SIBx, where x is an integer greater than 1). For example, SIB1 may inform whether SIBx is periodically broadcast or provided by a request of a UE by an on-demand method. When SIBx is provided by an on-demand method, SIB1 may include information necessary for the UE to perform an SI request. SIB1 is transmitted through the PDSCH, the PDCCH scheduling SIB1 is transmitted through the Type0-PDCCH common search space, and SIB1 is transmitted through the PDSCH indicated by the PDCCH.

-SIBx is included in the SI message and is transmitted through PDSCH. Each SI message is transmitted within a periodic time window (ie, SI-window).

The UE may perform a random access procedure to complete access to the BS (S13 to S16). For example, in a random access process, the UE transmits a preamble through a physical random access channel (PRACH) (S13), and a random access response to the preamble through a PDCCH and a corresponding PDSCH ( A random access response, RAR) may be received (S14). If reception of the RAR for the UE fails, the UE may attempt to transmit the preamble again. In the case of contention based random access, a contention resolution procedure including transmission of a PUSCH based on UL resource allocation included in the RAR (S15), and reception of a PDCCH and a corresponding PDSCH ( S16) can be performed.

After performing the above-described procedure, the UE may perform PDCCH/PDSCH reception (S17) and PUSCH/PUCCH transmission (S18) as a general uplink/downlink signal transmission process. The control information transmitted by the UE to the BS is collectively referred to as uplink control information (UCI). UCI includes HARQ ACK/NACK (Hybrid Automatic Repeat and ReQuest Acknowledgement/Negative-ACK) (also referred to as HARQ-ACK), scheduling request (SR), channel state information (CSI), and the like. The CSI may include a channel quality indicator (CQI), a precoding matrix indicator (PMI), and/or a rank indicator. UCI is generally transmitted through PUCCH, but may be transmitted through PUSCH when control information and traffic data are to be transmitted simultaneously. In addition, the UE may aperiodically transmit UCI through the PUSCH based on the request/instruction of the network.

5 illustrates a random access process that can be applied to the implementation(s) of the present disclosure. In particular, FIG. 5(a) illustrates a 4-step random access process, and FIG. 5(b) illustrates a 2-step random access process.

The random access process can be used in various ways for initial access, uplink synchronization adjustment, resource allocation, handover, radio link reconfiguration after radio link failure, and location measurement. The random access process is classified into a contention-based process and a dedicated (ie, non-contention-based) process. The contention-based random access process is generally used including initial access, and the dedicated random access process is used for handover, when downlink data arrives in the network, and when uplink synchronization is reset in case of location measurement. . In the contention-based random access process, the UE randomly selects a random access (RA) preamble. Accordingly, it is possible for a plurality of UEs to simultaneously transmit the same RA preamble, and thus a contention resolution process is required afterwards. On the other hand, in the dedicated random access procedure, the UE uses the RA preamble uniquely allocated by the BS to the UE. Therefore, the UE can perform a random access procedure without collision with other UEs.

Referring to FIG. 5(a), the contention-based random access process includes the following four steps. Hereinafter, messages transmitted in steps 1 to 4 may be referred to as Msg1 to Msg4, respectively.

-Step 1: The UE transmits an RA preamble through the PRACH.

-Step 2: The UE receives a random access response (RAR) from the BS through the PDSCH.

-Step 3: UE transmits UL data to BS through PUSCH based on RAR. Here, the UL data includes layer 2 and/or layer 3 messages.

-Step 4: The UE receives a contention resolution message from the BS through the PDSCH.

The UE may receive information about random access from the BS through the system information. If random access is required, the UE transmits Msg1 (eg, preamble) to the BS on the PRACH. The BS may distinguish each random access preamble through a time/frequency resource (RA Occasion, RO) and a random access preamble index (PI) in which the random access preamble is transmitted. When the BS receives the random access preamble from the UE, the BS transmits a RAR message to the UE on the PDSCH. For reception of the RAR message, the UE includes the scheduling information for the RAR message within a preset time window (eg, ra-ResponseWindow), CRC-masked L1/ with Random Access-RNTI (RA-RNTI) L2 control channel (PDCCH) is monitored. When receiving scheduling information through a PDCCH masked with RA-RNTI, the UE may receive a RAR message from the PDSCH indicated by the scheduling information. After that, the UE determines whether there is an RAR for itself in the RAR message. Whether there is a RAR for itself may be determined by whether there is a RAPID (Random Access preamble ID) for the preamble transmitted by the UE. The index of the preamble transmitted by the UE and the RAPID may be the same. The RAR is a corresponding random access preamble index, timing offset information for UL synchronization (eg, timing advance command (TAC), UL scheduling information (eg, UL grant) for Msg3 transmission), and UE temporary identification information ( Yes, including Temporary-C-RNTI, TC-RNTI) The UE receiving the RAR transmits Msg3 through the PUSCH according to the UL scheduling information and the timing offset value in the RAR. In Msg3, the ID of the UE (or In addition, Msg3 may contain RRC connection request-related information (eg, RRCSetupRequest message) for initial access to the network After receiving Msg3, the BS is a contention resolution message. Transmit Msg4 to the UE When the UE receives the contention resolution message and the contention resolution is successful, TC-RNTI is changed to C-RNTI In Msg4, the ID of the UE and/or RRC connection-related information (eg, RRCSetup Message).If the information transmitted through Msg3 and the information received through Msg4 do not match, or if Msg4 is not received for a certain period of time, the UE may report that contention resolution has failed and Msg3 may be retransmitted.

Meanwhile, the dedicated random access process includes the following three steps. Hereinafter, messages transmitted in steps 0 to 2 may be referred to as Msg0 to Msg2, respectively. The dedicated random access procedure may be triggered in the UE by the BS using a PDCCH (hereinafter, PDCCH order) for instructing transmission of an RA preamble.

-Step 0: The BS allocates an RA preamble to the UE through dedicated signaling.

-Step 1: The UE transmits an RA preamble through the PRACH.

-Step 2: The UE receives the RAR through the PDSCH from the BS.

The operations of steps 1 to 2 of the dedicated random access process may be the same as steps 1 to 2 of the contention-based random access process.

NR systems may require lower latency than conventional systems. In addition, a 4-step random access process may be undesirable for services that are particularly vulnerable to latency such as URLLC. A low latency random access process may be required within various scenarios of an NR system. When the implementation(s) of the present disclosure are performed with the random access process, in order to reduce the latency in the random access process, the implementation(s) of the present disclosure may be performed with the following two-step random access process. .

Referring to FIG. 5(b), the two-step random access process may consist of two steps: MsgA transmission from UE to BS and MsgB transmission from BS to UE. MsgA transmission may include transmission of an RA preamble through a PRACH and transmission of a UL payload through a PUSCH. In MsgA transmission, the PRACH and the PUSCH may be transmitted by time division multiplexing (TDM). Alternatively, in MsgA transmission, PRACH and PUSCH may be transmitted after frequency division multiplexing (FDM).

Upon receiving the MsgA, the BS may transmit MsgB to the UE. MsgB may include RAR for the UE.

An RRC connection request related message (eg, an RRCSetupRequest message) requesting to establish a connection between the RRC layer of the BS and the RRC layer of the UE may be included in the payload of MsgA and transmitted. In this case, MsgB may be used to transmit RRC connection related information (eg, RRCSetup message). Alternatively, an RRC connection request related message (eg, an RRCSetupRequest message) may be transmitted through a PUSCH transmitted based on a UL grant in the MsgB. In this case, RRC connection-related information (eg, RRCSetup message) related to the RRC connection request may be transmitted through the PDSCH associated with the PUSCH transmission after the PUSCH transmission based on MsgB.

6 illustrates a discontinuous reception (DRX) operation that may be applied to the implementation(s) of the present disclosure.

The UE may perform a DRX operation while performing a process and/or method according to the implementation(s) of the present disclosure. The UE in which DRX is configured may lower power consumption by discontinuously receiving DL signals. DRX may be performed in the RRC_IDLE state, the RRC_INACTIVE state, and the RRC_CONNECTED state. In the RRC_IDLE state and RRC_INACTIVE state, DRX is used for the UE to receive paging signals discontinuously. Hereinafter, DRX performed in the RRC_CONNECTED state will be described (RRC_CONNECTED DRX).

6 illustrates a DRX cycle for a UE in an RRC_CONNECTED state. Referring to FIG. 6, the DRX cycle is composed of On Duration and Opportunity for DRX. The DRX cycle defines the time interval at which the on duration is periodically repeated. The on duration represents a time period during which the UE performs PDCCH monitoring to receive the PDCCH. When DRX is configured, the UE performs PDCCH monitoring during on-duration. If there is a PDCCH successfully detected during PDCCH monitoring, the UE operates an inactivity timer and maintains an awake state. On the other hand, if there is no PDCCH successfully detected during PDCCH monitoring, the UE enters a sleep state after the on duration ends. Therefore, when DRX is configured, in performing the process and/or method according to the implementation(s) of the present disclosure, the UE may perform PDCCH monitoring/reception discontinuously in the time domain. For example, when DRX is set, a PDCCH reception occasion (eg, a slot having a PDCCH search space) in the present disclosure may be set discontinuously according to the DRX configuration. On the other hand, when DRX is not configured, in performing the process and/or method according to the implementation(s) of the present disclosure, the UE may continuously perform PDCCH monitoring/reception in the time domain. For example, when DRX is not set, a PDCCH reception timing (eg, a slot having a PDCCH search space) in the present disclosure may be continuously set. Meanwhile, regardless of whether or not DRX is set, PDCCH monitoring may be restricted in a time period set as a measurement gap.

The following table illustrates the UE process related to DRX. Referring to the following table, DRX configuration information is received through higher layer (eg, RRC) signaling, and whether DRX ON/OFF is controlled by the DRX command of the MAC layer. When DRX is configured, the UE may perform PDCCH monitoring discontinuously, as illustrated in FIG. 6.

Here, MAC-CellGroupConfig includes configuration information necessary to configure MAC parameters for a cell group. MAC-CellGroupConfig may also include configuration information about DRX. For example, MAC-CellGroupConfig may include information related to DRX as follows.

-Value of drx-OnDurationTimer: Defines the length of the start section of the DRX cycle

-Value of drx-InactivityTimer: Defines the length of the time interval in which the UE is awake after the PDCCH time when the PDCCH indicating initial UL or DL data is detected

-Value of drx-HARQ-RTT-TimerDL: Defines the length of the maximum time interval from receiving the initial DL transmission until the DL retransmission is received.

-Value of drx-HARQ-RTT-TimerDL: After the grant for initial UL transmission is received, the length of the maximum time interval until the grant for UL retransmission is received is defined.

-drx-LongCycleStartOffset: Defines the time length and start point of the DRX cycle

-drx-ShortCycle (optional): Defines the time length of the short DRX cycle

Here, if any one of drx-OnDurationTimer, drx-InactivityTimer, drx-HARQ-RTT-TimerDL, drx-HARQ-RTT-TimerDL is in operation, the UE performs PDCCH monitoring at every PDCCH period while maintaining the awake state.

7 shows an example of a frame structure usable in a 3GPP-based wireless communication system.

The structure of the frame of FIG. 7 is only an example, and the number of subframes, the number of slots, and the number of symbols in the frame may be variously changed. In the NR system, OFDM numerology (eg, subcarrier spacing, SCS) may be set differently between a plurality of cells aggregated to one UE. Accordingly, the same number of symbols may be set differently. The (absolute time) duration of a time resource (eg, a subframe, a slot, or a transmission time interval (TTI)) consisting of may be set differently between aggregated cells, where the symbol is OFDM Symbol (or, cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) symbol), SC-FDMA symbol (or, discrete Fourier transform-spread-OFDM (discrete Fourier transform-spread-OFDM, DFT-s-OFDM) symbol) In the present disclosure, a symbol, an OFDM-based symbol, an OFDM symbol, a CP-OFDM symbol, and a DFT-s-OFDM symbol may be replaced with each other.

Referring to FIG. 7, in the NR system, uplink and downlink transmissions are organized into frames. Each frame has a duration Tf of 10 ms and is divided into two half-frames, each with a duration of 5 ms. Each half-frame consists of five subframes, and the period Tsf of a single subframe is 1 ms. Subframes are further divided into slots, and the number of slots in the subframe depends on the subcarrier spacing. Each slot consists of 14 or 12 OFDM symbols based on a cyclic prefix. In a normal cyclic prefix (CP), each slot is composed of 14 OFDM symbols, and in the case of an extended CP, each slot is composed of 12 OFDM symbols. The numerology depends on the exponentially scalable subcarrier spacing Δf = 2u*15 kHz. The following table shows the number of OFDM symbols per slot (Nslotsymb), the number of slots per frame (Nframe, uslot), and the number of slots per subframe (Nsubframe, uslot) according to the subcarrier spacing △f = 2u*15 kHz for the regular CP. Is shown.

The following table shows the number of OFDM symbols per slot, the number of slots per frame, and the number of slots per subframe according to the subcarrier spacing Δf = 2u*15 kHz for the extended CP.

8 illustrates a resource grid of a slot. A slot contains a plurality of (eg, 14 or 12) symbols in the time domain. For each neuron (e.g., subcarrier spacing) and carrier, a common resource block (CRB) indicated by higher layer signaling (e.g., radio resource control (RRC) signaling) Nstart, ugrid Starting at, a resource grid of Nsize,ugrid,x*NRBsc subcarriers and Nsubframe,usymb OFDM symbols is defined. Here, Nsize,ugrid,x is the number of resource blocks (RBs) in the resource grid, and the subscript x is DL for downlink and UL for uplink. NRBsc is the number of subcarriers per RB, and NRBsc is usually 12 in a 3GPP-based wireless communication system. There is one resource grid for a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL). The carrier bandwidth Nsize,ugrid for the subcarrier spacing setting u is given to the UE by a higher layer parameter (eg, RRC parameter) from the network. Each element in the resource grid for the antenna port p and subcarrier spacing u is referred to as a resource element (RE), and one complex symbol may be mapped to each resource element. Each resource element in the resource grid is uniquely identified by an index k in the frequency domain and an index l indicating a symbol position relative to a reference point in the time domain. In the NR system, the RB is defined by 12 consecutive subcarriers in the frequency domain.

In the NR system, RBs may be classified into common resource blocks (CRBs) and physical resource blocks (PRBs). CRBs are numbered from 0 upwards in the frequency domain for the subcarrier spacing setting u. The center of subcarrier 0 of CRB 0 for subcarrier spacing setting u coincides with'point A'which is a common reference point for resource block grids. PRBs are defined within a bandwidth part (BWP) and are numbered from 0 to NsizeBWP,i-1, where i is the number of the bandwidth part. The relationship between the common resource block nCRB and the physical resource block nPRB in the bandwidth part i is as follows: nPRB = nCRB + NsizeBWP,i, where NsizeBWP,i is a common resource block in which the bandwidth part starts relative to CRB 0. The BWP includes a plurality of consecutive RBs in the frequency domain. The carrier may contain up to N (eg, 5) BWPs. The UE may be configured to have more than one BWP on a given component carrier. Data communication is performed through an activated BWP, and only a predetermined number (eg, one) of BWPs set to the UE may be activated on the corresponding carrier.

A UE with carrier aggregation configured may be configured to use one or more cells. When a UE is configured to have a plurality of serving cells, the UE may be configured to have one or a plurality of cell groups. The UE may be configured to have a plurality of cell groups associated with different BSs. Alternatively, the UE may be configured to have a plurality of cell groups associated with a single BS. Each cell group of the UE is composed of one or more serving cells, and each cell group includes a single PUCCH cell in which PUCCH resources are configured. The PUCCH cell may be a Pcell or an Scell configured as a PUCCH cell among Scells of a corresponding cell group. Each serving cell of the UE belongs to one of the cell groups of the UE and does not belong to a plurality of cell groups.

9 illustrates slot structures that can be used in a 3GPP-based system. In all 3GPP based systems, e.g., NR systems, each slot is a self-contained structure that may include i) a DL control channel, ii) DL or UL data, and/or iii) a UL control channel. Can have For example, the first N symbols in the slot may be used to transmit the DL control channel (hereinafter, the DL control region), and the last M symbols in the slot may be used to transmit the UL control channel (hereinafter, the UL control region ). N and M are each non-negative integer. A resource region (hereinafter, a data region) between the DL control region and the UL control region may be used for DL data transmission or UL data transmission. The symbols of a single slot may be divided into group(s) of consecutive symbols that can be used as DL, UL, or flexible. Hereinafter, information indicating how each of the symbols of the slot is used is referred to as a slot format. For example, the slot format may define which symbols in the slot are used for UL and which symbols are used for DL.

When a serving cell is to be operated in a TDD mode, the BS may set a pattern for UL and DL allocation for the serving cell through higher layer (eg, RRC) signaling. For example, the following parameters can be used to set the TDD DL-UL pattern:

-Dl-UL-TransmissionPeriodicity providing the period of the DL-UL pattern;

-NrofDownlinkSlots providing the number of consecutive full DL slots at the beginning of each DL-UL pattern, wherein the full slot is a slot having only downlink symbols;

-NrofDownlinkSymbols providing the number of consecutive DL symbols at the beginning of the slot immediately following the last complete DL slot;

-NrofUplinkSlots providing the number of consecutive full UL slots within the end of each DL-UL pattern, wherein the full UL slot is a slot having only uplink symbols; And

-NrofUplinkSymbols providing the number of consecutive UL symbols in the end of the slot immediately preceding the first full UL slot.

Among the symbols in the DL-UL pattern, the remaining symbols that are neither set as DL symbols nor UL symbols are flexible symbols.

The UE that has received the configuration for the TDD DL-UL pattern, that is, the TDD UL-DL configuration (eg, tdd-UL-DL-ConfigurationCommon, or tdd-UL-DLConfigurationDedicated) through higher layer signaling, is slotted based on the configuration. Set the slot format for each slot across the fields.

Meanwhile, various combinations of a DL symbol, a UL symbol, and a flexible symbol for a symbol are possible, but a predetermined number of combinations may be predefined as slot formats, and the predefined slot formats can be identified by slot format indexes, respectively. I can. The following table illustrates some of the predefined slot formats. In the following table, D denotes a DL symbol, U denotes a UL symbol, and F denotes a flexible symbol.

In order to inform which of the predefined slot formats is used in a specific slot, the BS provides a combination of slot formats applicable to the corresponding serving cell for each cell through higher layer (e.g., RRC) signaling for a set of serving cells. A set of these may be set, and the UE may be configured to monitor a group-common PDCCH for a slot format indicator (SFI)(s) through higher layer (eg, RRC) signaling. Hereinafter, the DCI carried by the group-common PDCCH for SFI(s) is referred to as SFI DCI. DCI format 2_0 is used as the SFI DCI. For example, for each serving cell in the set of serving cells, the BS is the (start) position of the slot format combination ID (i.e., SFI-index) for the corresponding serving cell within the SFI DCI, the slot applicable to the serving cell. A set of format combinations, a reference subcarrier interval setting for each slot format in the slot format combination indicated by the SFI-index value in the SFI DCI may be provided to the UE. One or more slot formats are set for each slot format combination in the set of slot format combinations and a slot format combination ID (ie, SFI-index) is assigned. For example, when the BS wants to set a slot format combination with N slot formats, N slots among slot format indexes for slot formats predefined for the slot format combination (eg, see Table 4) Format indexes can be indicated. The BS informs the UE of the total length of the SFI-RNTI, which is the RNTI used for SFI, and the DCI payload scrambled with the SFI-RNTI to configure the UE to monitor the group-common PDCCH for SFIs. When the UE detects the PDCCH based on the SFI-RNTI, the UE may determine the slot format(s) for the corresponding serving cell from the SFI-index for the serving cell among SFI-indexes in the DCI payload within the PDCCH. .

Symbols indicated as flexible by the TDD DL-UL pattern configuration may be indicated as uplink, downlink or flexible by SFI DCI. Symbols indicated as downlink/uplink by TDD DL-UL pattern configuration are not overridden as uplink/downlink or flexible by SFI DCI.

If the TDD DL-UL pattern is not configured, the UE determines whether each slot is uplink or uplink and the symbol allocation within each slot is SFI DCI and/or DCI scheduling or triggering transmission of downlink or uplink signals (e.g., DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 2_3).

Hereinafter, physical channels that can be used in a 3GPP-based wireless communication system will be described in more detail.

PDCCH carries DCI. For example, the PDCCH (i.e., DCI) is a transmission format and resource allocation of a downlink shared channel (DL-SCH), resource allocation information for an uplink shared channel (UL-SCH), Located above the physical layer among the protocol stacks of UE/BS such as paging information for a paging channel (PCH), system information on the DL-SCH, and random access response (RAR) transmitted on the PDSCH. It carries resource allocation information for a control message of a layer (hereinafter, upper layer), a transmission power control command, and activation/release of configured scheduling (CS). DCI includes a cyclic redundancy check (CRC), and the CRC is masked/scrambled with various identifiers (e.g., radio network temporary identifier (RNTI)) according to the owner or usage of the PDCCH. For example, if the PDCCH is for a specific UE, the CRC is masked with a UE identifier (eg, cell RNTI (C-RNTI)) If the PDCCH is for paging, the CRC is masked with a paging RNTI (P-RNTI). If the PDCCH relates to system information (eg, system information block (SIB), then the CRC is masked with system information RNTI (system information RNTI, SI-RNTI)). If the PDCCH is for random access response, the CRC is Masked with random access RNTI (RA-RATI).

The PDCCH is transmitted through a control resource set (CORESET). One or more CORESET may be set to the UE. CORESET consists of a set of physical resource blocks (PRBs) with a time period of 1 to 3 OFDM symbols. PRBs constituting the CORESET and the CORESET duration may be provided to the UE through higher layer (eg, RRC) signaling. The set of PDCCH candidates within the set CORESET(s) is monitored according to the corresponding search space sets. Here, monitoring implies decoding (aka, blind decoding) each PDCCH candidate in the monitored DCI formats. The set of PDCCH candidates monitored by the UE is defined in terms of PDCCH search space sets. The search space set may be a common search space (CSS) set or a UE-specific search space (USS) set. Each CORESET setting is associated with one or more sets of search spaces, and each set of search spaces is associated with one CORESET setting. The search space set is determined based on the following parameters provided to the UE by the BS.

-controlResourceSetId: identifies the CORESET associated with the search space set.

-monitoringSlotPeriodicityAndOffset: indicates slots for PDCCH monitoring set as period and offset.

-monitoringSymbolsWithinSlot: indicates the first symbol(s) for PDCCH monitoring in slots for PDCCH monitoring.

-nrofCandidates: indicates the number of PDCCH candidates for each CCE aggregation level.

PDSCH is a physical layer UL channel for UL data transport. The PDSCH carries downlink data (e.g., a DL-SCH transport block), and modulation methods such as Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM are applied. A codeword is generated by encoding a transport block (TB). The PDSCH can carry up to two codewords. Scrambling and modulation mapping are performed for each codeword, and modulation symbols generated from each codeword may be mapped to one or more layers. Each layer is mapped to a radio resource together with a DMRS to generate an OFDM symbol signal, and is transmitted through a corresponding antenna port.

PUCCH means a physical layer UL channel for UCI transmission. PUCCH carries UCI (Uplink Control Information). UCI includes:

-Scheduling request (SR): This is information used to request UL-SCH resources.

-Hybrid automatic repeat request (HARQ)-acknowledgement (ACK): This is a response to a downlink data packet (eg, codeword) on the PDSCH. Indicates whether a downlink data packet has been successfully received by the communication device. HARQ-ACK 1 bit may be transmitted in response to a single codeword, and HARQ-ACK 2 bits may be transmitted in response to two codewords. The HARQ-ACK response includes positive ACK (simply, ACK), negative ACK (NACK), DTX or NACK/DTX. Here, the term HARQ-ACK is mixed with HARQ ACK/NACK, ACK/NACK, or A/N.

-Channel state information (CSI): This is feedback information on a downlink channel. CSI is channel quality information (CQI), rank indicator (rank indicator, RI), precoding matrix indicator (PMI), CSI-RS resource indicator (CSI-RS resource indicator, CRI), SS /PBCH resource block indicator, SSBRI), may include a layer indicator (layer indicator, LI). CSI may be divided into CSI part 1 and CSI part 2 according to the UCI type included in the CSI. For example, CRI, RI, and/or CQI for the first codeword may be included in CSI Part 1, and CQI for LI, PMI, and the second codeword may be included in CSI Part 2.

In this disclosure, for convenience, PUCCH resources set and/or indicated by the BS to the UE for HARQ-ACK, SR, and CSI transmission are referred to as HARQ-ACK PUCCH resources, SR PUCCH resources, and CSI PUCCH resources, respectively.

The PUCCH format may be classified as follows according to the UCI payload size and/or transmission length (eg, the number of symbols constituting the PUCCH resource). For information on the PUCCH format, Table 5 may be referred to.

(0) PUCCH format 0 (PF0, F0)

-Supportable UCI payload size: up to K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X = 2)

-Transmission structure: PUCCH format 0 consists of only UCI signals without DMRS, and the UE transmits the UCI state by selecting and transmitting one of a plurality of sequences. For example, the UE transmits a specific UCI to the BS by transmitting one of a plurality of sequences through PUCCH of PUCCH format 0. The UE transmits the PUCCH of PUCCH format 0 in the PUCCH resource for SR configuration corresponding to only when transmitting a positive SR.

-The setting for PUCCH format 0 includes the following parameters for the corresponding PUCCH resource: an index for initial cyclic transition, the number of symbols for PUCCH transmission, and the first symbol for the PUCCH transmission.

(1) PUCCH format 1 (PF1, F1)

-Supportable UCI payload size: up to K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols (e.g., Y = 4, Z = 14)

-Transmission structure: DMRS and UCI are set/mapped to different OFDM symbols in the form of TDM. That is, the DMRS is transmitted in a symbol in which a modulation symbol is not transmitted. UCI is expressed by multiplying a specific sequence (eg, orthogonal cover code (OCC)) by a modulation (eg, QPSK) symbol. By applying a cyclic shift (CS)/OCC to both UCI and DMRS ( Code division multiplexing (CDM) is supported between multiple PUCCH resources (according to PUCCH format 1) within the same RB. PUCCH format 1 carries UCI with a maximum size of 2 bits, and the modulation symbol is in the time domain. Is spread by an orthogonal cover code (OCC) (which is set differently depending on whether or not frequency hopping).

-The setting for PUCCH format 1 includes the following parameters for the corresponding PUCCH resource: index for initial cyclic transition, number of symbols for PUCCH transmission, first symbol for PUCCH transmission, orthogonal cover code Index for ).

(2) PUCCH format 2 (PF2, F2)

-Supportable UCI payload size: more than K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X = 2)

-Transmission structure: DMRS and UCI are configured/mapped in the form of frequency division multiplex (FDM) within the same symbol. The UE transmits the coded UCI bits by applying only IFFT without DFT. PUCCH format 2 carries UCI of a bit size larger than K bits, and a modulation symbol is transmitted after FDM with DMRS. For example, the DMRS is located at symbol indexes #1, #4, #7, and #10 in a given resource block with a density of 1/3. A pseudo noise (PN) sequence is used for the DMRS sequence. Frequency hopping may be activated for 2-symbol PUCCH format 2.

-The setting for PUCCH format 2 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, the first symbol for the PUCCH transmission.

(3) PUCCH format 3 (PF3, F3)

-Supportable UCI payload size: more than K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols (e.g., Y = 4, Z = 14)

-Transmission structure: DMRS and UCI are set/mapped to different symbols in the form of TDM. The UE transmits by applying DFT to the coded UCI bits. PUCCH format 3 does not support UE multiplexing for the same time-frequency resource (eg, the same PRB).

-The setting for PUCCH format 3 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, the first symbol for the PUCCH transmission.

(4) PUCCH format 4 (PF4, F4)

-Supportable UCI payload size: more than K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols (e.g., Y = 4, Z = 14)

-Transmission structure: DMRS and UCI are set/mapped to different symbols in the form of TDM. PUCCH format 4 can multiplex up to 4 UEs in the same PRB by applying OCC at the front end of the DFT and CS (or interleaved FDM (IFDM) mapping) for DMRS. In other words, the modulation symbols of UCI are transmitted after DMRS and TDM (Time Division Multiplexing).

-The configuration for PUCCH format 4 includes the following parameters for the corresponding PUCCH resource: the number of symbols for PUCCH transmission, length for orthogonal cover code, index for orthogonal cover code, first symbol for the PUCCH transmission.

The following table illustrates PUCCH formats. Depending on the PUCCH transmission length, it may be divided into short PUCCH (formats 0, 2) and long PUCCH (formats 1, 3, 4).

PUCCH resources may be determined for each UCI type (eg, A/N, SR, CSI). PUCCH resources used for UCI transmission may be determined based on UCI (payload) size. For example, the BS configures a plurality of PUCCH resource sets to the UE, and the UE may select a specific PUCCH resource set corresponding to a specific range according to the range of the UCI (payload) size (eg, the number of UCI bits). For example, the UE may select one of the following PUCCH resource sets according to the number of UCI bits (NUCI).

-PUCCH resource set #0, if number of UCI bits =< 2

-PUCCH resource set #1, if 2< number of UCI bits =< N1

...

-PUCCH resource set #(K-1), if NK-2 <number of UCI bits = <NK-1

Here, K is the number of PUCCH resource sets (K>1), and Ni is the maximum number of UCI bits supported by the PUCCH resource set #i. For example, PUCCH resource set #1 may be composed of resources of PUCCH format 0 to 1, and other PUCCH resource sets may be composed of resources of PUCCH format 2 to 4 (refer to Table 5).

The setting for each PUCCH resource includes a PUCCH resource index, a starting PRB index, a setting for one of PUCCH formats 0 to PUCCH 4, and the like. In the UE, the code rate for multiplexing HARQ-ACK, SR and CSI report(s) in PUCCH transmission using PUCCH format 2, PUCCH format 3, or PUCCH format 4 is set to the UE by the BS through the upper layer parameter maxCodeRate. . The upper layer parameter maxCodeRate is used to determine how to feed back UCI on PUCCH resources for PUCCH formats 2, 3 or 4.

When the UCI type is SR or CSI, the PUCCH resource to be used for UCI transmission in the PUCCH resource set may be configured to the UE by the network through higher layer signaling (eg, RRC signaling). When the UCI type is HARQ-ACK for the SPS (Semi-Persistent Scheduling) PDSCH, the PUCCH resource to be used for UCI transmission within the PUCCH resource set may be set to the UE by the network through higher layer signaling (e.g., RRC signaling). have. On the other hand, when the UCI type is HARQ-ACK for a PDSCH scheduled by DCI, a PUCCH resource to be used for UCI transmission within a PUCCH resource set may be scheduled based on DCI.

In the case of DCI-based PUCCH resource scheduling, the BS transmits the DCI to the UE through the PDCCH, and the PUCCH to be used for UCI transmission within a specific PUCCH resource set through the ACK/NACK resource indicator (ARI) in the DCI. Resources can be directed. ARI is used to indicate PUCCH resources for ACK/NACK transmission, and may also be referred to as a PUCCH resource indicator (PUCCH resource indicator, PRI). Here, DCI is a DCI used for PDSCH scheduling, and UCI may include HARQ-ACK for PDSCH. Meanwhile, the BS may set a PUCCH resource set consisting of PUCCH resources larger than the number of states that can be represented by the ARI using a (UE-specific) higher layer (eg, RRC) signal. At this time, the ARI indicates a PUCCH resource sub-set within the PUCCH resource set, and which PUCCH resource is to be used in the indicated PUCCH resource sub-set is transmission resource information for the PDCCH (e.g., PDCCH start control channel element (control channel element, CCE) index, etc.) based on an implicit rule.

The PUSCH carries uplink data (eg, UL-SCH TB) and/or uplink control information (UCI), and is transmitted based on a CP-OFDM waveform or a DFT-s-OFDM waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, if transform precoding is impossible (e.g., if transform precoding is disabled), the UE transmits a PUSCH based on the CP-OFDM waveform, and if transform precoding is possible (e.g., transform precoding When this is enabled), the UE may transmit the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. PUSCH transmission is dynamically scheduled by the UL grant in the DCI, or semi-static based on higher layer (eg, RRC) signaling (and/or layer 1 (layer 1, L1) signaling (eg, PDCCH))). static). Based on upper layer (e.g., RRC) signaling (and/or L1 (i.e., PHY) signaling), a semi-static scheduled resource assignment (i.e., assignment) is a set grant It is also called (configured grant). PUSCH transmission may be performed based on a codebook or a non-codebook.

The UE must have uplink resources available to the UE for UL-SCH data transmission, and must have downlink resources available to the UE for DL-SCH data reception. Uplink resources and downlink resources are assigned to the UE through resource allocation by the BS. Resource allocation may include time domain resource allocation (TDRA) and frequency domain resource allocation (FDRA). In this disclosure, uplink resource allocation is also referred to as an uplink grant, and downlink resource allocation is also referred to as a downlink allocation. The uplink grant is dynamically received on the PDCCH or in the RAR by the UE, or is semi-persistently set to the UE by RRC signaling from the BS. The downlink assignment is dynamically received on the PDCCH by the UE, or is semi-statically set to the UE by RRC signaling from the BS.

In the UL, the BS may dynamically allocate uplink resources to the UE through PDCCH(s) addressed to a cell radio network temporary identifier (C-RNTI). The UE monitors the PDCCH(s) to find possible uplink grant(s) for UL transmission. In addition, the BS can allocate uplink resources using a grant set to the UE. Two types of set grants, type 1 and type 2, can be used. In the case of type 1, the BS directly provides a set uplink grant (including a period) through RRC signaling. In the case of type 2, the BS sets the period of the RRC configured uplink grant through RRC signaling, and the configured scheduling RNTI (configured scheduling RNTI, CS-RNTI) through the PDCCH (PDCCH addressed to CS-RNTI) The uplink grant may be signaled and activated or may be deactivated. For example, in the case of type 2, the PDCCH addressed as CS-RNTI indicates that the corresponding uplink grant can be implicitly reused according to a period set by RRC signaling until deactivation.

In the DL, the BS can dynamically allocate downlink resources to the UE through PDCCH(s) addressed with C-RNTI. The UE monitors the PDCCH(s) to find possible downlink assignments. In addition, the BS may allocate downlink resources to the UE using semi-static scheduling (SPS). The BS may set a period of downlink assignments set through RRC signaling, and may signal and activate the set downlink assignment through the PDCCH addressed to CS-RNTI, or deactivate it. For example, the PDCCH addressed to CS-RNTI indicates that the corresponding downlink assignment can be implicitly reused according to a period set by RRC signaling until deactivation.

Hereinafter, resource allocation by PDCCH and resource allocation by RRC will be described in more detail.

* Resource allocation by PDCCH: dynamic grant/allocation

The PDCCH can be used to schedule DL transmission on the PDSCH or UL transmission on the PUSCH. DCI on the PDCCH for scheduling DL transmission may include DL resource allocation including at least a modulation and coding format (e.g., modulation and coding scheme (MCS) index IMCS), resource allocation, and HARQ information related to the DL-SCH. have. The DCI on the PDCCH for scheduling UL transmission may include an uplink scheduling grant that includes at least a modulation and coding format, resource allocation, and HARQ information related to UL-SCH. The size and use of DCI carried by one PDCCH differs according to the DCI format. For example, DCI format 0_0, DCI format 0_1, or DCI format 0_2 may be used for scheduling a PUSCH, and DCI format 1_0, DCI format 1_1, or DCI format 1_2 may be used for scheduling a PDSCH. In particular, DCI format 0_2 and DCI format 1_2 have higher transmission reliability and lower latency than the transmission reliability and latency requirements guaranteed by DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1. It can be used to schedule transmissions with requirements. Some implementations of this disclosure may be applied to UL data transmission based on DCL format 0_2. Some implementations of this disclosure may be applied to DL data reception based on DCI format 1_2.

10 illustrates an example of PDSCH time domain resource allocation by PDCCH and an example of PUSCH time domain resource allocation by PDCCH.

The DCI carried by the PDCCH to schedule the PDSCH or PUSCH includes a time domain resource assignment (TDRA) field, and the TDRA field is a row to an allocation table for PDSCH or PUSCH. ) Provide the value m for index m+1. A predefined default PDSCH time domain allocation is applied as the allocation table for the PDSCH, or the PDSCH time domain resource allocation table set by the BS through the RRC signaling pdsch-TimeDomainAllocationList is applied as the allocation table for the PDSCH. A predefined default PUSCH time domain allocation is applied as the allocation table for the PDSCH, or the PUSCH time domain resource allocation table set by the BS through the RRC signaling pusch-TimeDomainAllocationList is applied as the allocation table for the PUSCH. The PDSCH time domain resource allocation table to be applied and/or the PUSCH time domain resource allocation table to be applied may be determined according to a fixed/predefined rule (eg, see 3GPP TS 38.214).

In the PDSCH time domain resource configurations, each indexed row is assigned a DL allocation-to-PDSCH slot offset K0, a start and length indicator SLIV (or directly a start position of a PDSCH in the slot (eg, start symbol index S) and an allocation length (eg , The number of symbols L)), defines the PDSCH mapping type. In the PUSCH time domain resource settings, each indexed row is a UL grant-to-PUSCH slot offset K2, a start position of a PUSCH in the slot (eg, start symbol index S) and an allocation length (eg, number of symbols L), and PUSCH mapping type. Defines K0 for PDSCH or K2 for PUSCH indicates a difference between a slot with a PDCCH and a slot with a PDSCH or PUSCH corresponding to the PDCCH.

SLIV is a joint indication of a start symbol S relative to the start of a slot having a PDSCH or PUSCH and the number L of consecutive symbols counted from the symbol S. In the case of the PDSCH/PUSCH mapping type, there are two types of mapping: one is mapping type A and the other is mapping type B. In the case of PDSCH/PUSCH mapping type A, a demodulation reference signal (DMRS) is located in a third symbol (symbol #2) or a fourth symbol (symbol #3) in a slot according to RRC signaling. In the case of PDSCH/PUSCH mapping type B, the DMRS is located in the first symbol allocated for PDSCH/PUSCH.

The scheduling DCI includes a frequency domain resource assignment (FDRA) field that provides assignment information on resource blocks used for PDSCH or PUSCH. For example, the FDRA field provides the UE with information about a cell for PDSCH or PUSCCH transmission, information about a BWP for PDSCH or PUSCH transmission, and information about resource blocks for PDSCH or PUSCH transmission.

* Resource allocation by RRC

As mentioned above, in the case of uplink, there are two types of transmission without a dynamic grant: an established grant type 1 and an established grant type 2. In the case of an established grant type 1, a UL grant is provided by RRC signaling and is a configured grant. Is saved. In the case of the configured grant type 2, the UL grant is provided by the PDCCH and is stored or cleared as an uplink grant configured based on L1 signaling indicating activation or deactivation of the configured uplink grant. Type 1 and Type 2 may be set by RRC signaling for each serving cell and for each BWP. Multiple settings can be active simultaneously on different serving cells.

When the configured grant type 1 is configured, the UE may receive the following parameters from the BS through RRC signaling:

-CS-RNTI for retransmission, cs-RNTI;

-Periodicity, which is the set grant type 1 period;

-TimeDomainOffset indicating an offset of a resource for a system frame number (SFN) = 0 in the time domain;

-A timeDomainAllocation value m, which provides a row index m+1 pointing to an allocation table, indicating a combination of a start symbol S, a length L, and a PUSCH mapping type;

-FrequencyDomainAllocation providing frequency domain resource allocation; And

-McsAndTBS providing IMCS indicating modulation order, target code rate and transport block size.

When setting the configuration grant type 1 for the serving cell by RRC, the UE stores the UL grant provided by RRC as a configured uplink grant for the indicated serving cell, and in timeDomainOffset and S (derived from SLIV) Initialize or re-initialize so that the configured uplink grant starts in the corresponding symbol and recurs with periodicity. After the uplink grant is configured for the configured grant type 1, the UE may consider that the uplink grant is associated with each symbol that satisfies the following and recurs (consider): [(SFN * numberOfSlotsPerFrame (numberOfSymbolsPerSlot) + ( slot number in the frame * numberOfSymbolsPerSlot) + symbol number in the slot] = (timeDomainOffset * numberOfSymbolsPerSlot + S + N * periodicity) modulo (1024 * numberOfSlotsPerFrame * numberOfSymbolsPerSlot), for all N >= 0, where numberOfSlotsPerFrame and numberOfSymbolsPerSlot are per frame The number of consecutive slots and consecutive OFDM symbols for each slot are shown, respectively (refer to Tables 2 and 3).

When the configured grant type 2 is configured, the UE may receive the following parameters from the BS through RRC signaling:

-Cs-RNTI, CS-RNTI for activation, deactivation, and retransmission; And

-Periodicity that provides the set grant type 2 period.

The actual uplink grant is provided to the UE by the PDCCH (addressed with CS-RNTI). After the uplink grant is configured for the configured grant type 2, the UE may consider that the uplink grant recurs in association with each symbol that satisfies the following: [(SFN * numberOfSlotsPerFrame * numberOfSymbolsPerSlot) + (slot number in the frame * numberOfSymbolsPerSlot) + symbol number in the slot] = [(SFNstart time * numberOfSlotsPerFrame * numberOfSymbolsPerSlot + slotstart time * numberOfSymbolsPerSlot + symbolstart time) + N * periodicity] modulo (1024 * numberOfSlotsPerFrame * numberOfSymbolsPerSlot), for all> 0 , Here, SFNstart time, slotstart time, and symbolstart time represent SFN, slot, and symbol of the first transmission opportunity of the PUSCH after the set grant is (re-)initialized, respectively (respectively), numberOfSlotsPerFrame and numberOfSymbolsPerSlot are The number of consecutive slots per frame and consecutive OFDM symbols per slot are shown, respectively (see Tables 2 and 3).

In the case of downlink, the UE may be configured with semi-persistent scheduling (SPS) for each serving cell and for each BWP by RRC signaling from the BS. In the case of DL SPS, DL allocation is provided to the UE by PDCCH, and is stored or removed based on L1 signaling indicating SPS activation or deactivation. When the SPS is configured, the UE may receive the following parameters from the BS through RRC signaling:

-Cs-RNTI, CS-RNTI for activation, deactivation, and retransmission;

-NrofHARQ-Processes providing the number of HARQ processes configured for SPS;

-A periodicity that provides a period of downlink allocation set for SPS.

After downlink assignment is set for SPS, the UE may sequentially consider that the N-th downlink assignment occurs in a slot that satisfies the following: (numberOfSlotsPerFrame * SFN + slot number in the frame ) = [(numberOfSlotsPerFrame * SFNstart time + slotstart time) + N * periodicity * numberOfSlotsPerFrame / 10] modulo (1024 * numberOfSlotsPerFrame), where SFNstart time and slotstart time are the first of the PDSCH after the set downlink allocation is (re-)initialized. The SFN, slot, and symbol of the th transmission are respectively represented, and numberOfSlotsPerFrame and numberOfSymbolsPerSlot represent the number of consecutive slots per frame and consecutive OFDM symbols per slot, respectively (see Tables 2 and 3).

The cyclic redundancy check (CRC) of the DCI format is scrambled with the CS-RNTI provided by the RRC parameter cs-RNTI, and the new data indicator field for the enabled transport block is set to 0. If there is, the UE confirms that the DL SPS allocated PDCCH or the configured uplink grant type 2 PDCCH is valid for scheduling activation or scheduling cancellation. If all fields for the DCI format are set according to Table 6 or Table 7, validity confirmation of the DCI format is achieved. Table 6 illustrates special fields for validating DL SPS and UL grant type 2 scheduling activation PDCCH, and Table 7 exemplifies special fields for validating DL SPS and UL grant type 2 scheduling release PDCCH.

The actual DL allocation or UL grant for DL SPS or UL grant type 2, and the corresponding modulation and coding scheme are resource allocation fields in the DCI format carried by the corresponding DL SPS or UL grant type 2 scheduling activation PDCCH ( Yes, it is provided by a TDRA field providing a TDRA value m, an FDRA field providing a frequency resource block allocation, and a modulation and coding scheme field). When validity check is achieved, the UE regards the information in the DCI format as valid activation or valid release of DL SPS or configured uplink grant type 2.

11 illustrates a HARQ-ACK transmission/reception process.

Referring to FIG. 11, the UE may detect a PDCCH in slot n. Thereafter, the UE may receive the PDSCH in slot n+K0 according to the scheduling information received through the PDCCH in slot n, and then transmit UCI through the PUCCH in slot n+K1. Here, the UCI includes a HARQ-ACK response for the PDSCH. When the PDSCH is configured to transmit a maximum of 1 TB, the HARQ-ACK response may consist of 1-bit. When the PDSCH is set to transmit up to two transport blocks (TB), the HARQ-ACK response is composed of 2-bits when spatial bundling is not set, and 1-bits when spatial bundling is set. I can. When the HARQ-ACK transmission time point for a plurality of PDSCHs is designated as slot n+K1, the UCI transmitted in slot n+K1 includes HARQ-ACK responses for the plurality of PDSCHs.

In the case of a service having strict latency and reliability requirements (eg, URLLC service), the reliability of PUSCH/PDSCH transmission may have to be higher than that of conventional PUSCH/PDSCH transmission. In order to improve the reliability of PUSCH/PDSCH transmission, repeated transmission of PUSCH/PDSCH may be considered. For example, the BS may set the UE to repeat transmission of PUSCH/PDSCH in K consecutive slots, and the UE may repeat transmission/reception of TB in each slot over K consecutive slots. . In some examples or implementations of the present disclosure, the same symbol allocation may be applied across the K consecutive slots. In other words, the starting symbol index and the number of symbols for the PUSCH/PDSCH may be the same for each of the K consecutive slots. When the same resource allocation is used for repetition of PUSCH/PDSCH transmission, reliability or coverage of the PUSCH/PDSCH transmission can be secured. However, allowing only the same resource allocation for the PUSCH/PDSCH in consecutive slots for repetition of PUSCH/PDSCH transmission may make flexible resource allocation difficult. In addition, if the UE needs to perform PDCCH reception and PUSCH allocation in one slot in order to secure the latency requirement, only a few symbols in the second half of the slot will be available for PUSCH transmission, so a slot that follows the slot In this case, repetitive transmission may have to be delayed. In this case, when the UE needs to perform a certain number of repetitive transmissions to secure reliability, a large latency may occur in transmission/reception of the corresponding PUSCH/PDSCH. Therefore, for more flexible and efficient resource utilization and service support, and for faster and more robust UL channel transmission, PUSCH/PDSCH transmission is repeated at intervals smaller than slots to support transmission of multiple PUSCH/PDSCHs in one slot or slot boundary. ), it is good that the PUSCH/PDSCH can be transmitted. When a plurality of PUSCH/PDSCHs are transmitted in one slot, frequency hopping to change frequency resources between transmissions of PUSCH/PDSCH is additionally considered in order to secure reliability through frequency diversity. Can be.

The repetition of PUSCH/PDSCH can be applied to transmission of PUSCH/PDSCH based on a set grant as well as PUSCH/PDSCH transmission based on dynamic UL grant/DL allocation through PDCCH. In some examples or implementations of the present disclosure, in the case of PUSCH/PDSCH transmission based on a configured grant, resource allocation for one TB is always determined within one period of the configured grant. For example, a time duration for transmission of K repetitions for one TB does not exceed a time duration induced by a period P of a set grant. When repetitive transmission is performed based on a set grant, it is advantageous to sufficiently secure reliability when repetitive transmission is performed using the same resource allocation in each of the consecutive slots. Meanwhile, in some examples/implementations of the present invention, the UE transmits/receives PUSCH/PDSCH only at a predetermined position according to a redundancy version (RV) sequence among a plurality of PUSCH/PDSCH resources within a period of a set grant. . For example, in some examples/implementations, if the configured RV sequence is {0, 2, 3, 1}, the UE performs the initial transmission of the TB as the first of K transmission occasions (TOs) of K repetitions. Start at TO. In this case, in order to secure the reliability of PUSCH/PDSCH transmission, it may be necessary to secure a long time, or it may be difficult to set a short period using a plurality of PUSCH resources. In particular, when TB transmission is started in the middle of a plurality of PUSCH/PDSCH resources within the set grant period, that is, in the middle TO among TOs, it may be difficult to perform repetition a sufficient number of times.

Since the period of the set grant is closely related to the latency of the PUSCH/PDSCH, the operation using the set grant of a short period is allowed regardless of the transmission length of the PUSCH/PDSCH (e.g., the number of symbols occupied by the PUSCH/PDSCH). There may be a need. Alternatively, even when TB transmission is started in an intermediate PUSCH/PDSCH resource in the time domain among a plurality of PUSCH/PDSCH resources, it may be necessary to allow a sufficient number of repetitive transmissions. Therefore, an operation of repeatedly transmitting PUSCH/PDSCH at intervals shorter than that of a slot may be required.

In the case of URLLC, which is one of the representative scenarios of the next system, it has a user plane delay of 0.5ms and a low-latency, high-reliability requirement to transmit X bytes of data within 1ms within a 10^-5 error rate. In addition, eMBB generally has a large traffic capacity, but URLLC traffic has different characteristics that the file size is within tens to hundreds of bytes and is sporadic. Therefore, eMBB requires transmission that maximizes the transmission rate and minimizes the overhead of control information, and URLLC requires a short scheduling time unit and a reliable transmission method.

Depending on the application field or the type of traffic, the reference time unit assumed/used to transmit/receive a physical channel may vary. The reference time may be a basic unit for scheduling a specific physical channel, and the reference time unit may be changed according to the number of symbols constituting the corresponding scheduling time unit and/or subcarrier spacing. Some examples/implementations of the present disclosure are described based on a slot or a mini-slot as a reference time unit for convenience of description. The slot may be, for example, a basic scheduling unit used for general data traffic (eg, eMBB). The mini-slot may have a shorter time period than the slot in the time domain, and is a basic scheduling used in a special or communication method (e.g., URLLC or unlicensed band or millimeter wave) for a special purpose. It can also be a unit. However, the example(s)/implementation(s) of the present disclosure transmit/receive a physical channel based on a mini-slot for eMBB service, or transmit/receive a physical channel based on a slot for URLLC or other communication techniques. It can also be applied if you do.

In some scenarios of radio access technology, when radio transmission and resource allocation to be used for the UE are dynamically instructed through DCI, the UE is a semi-static DL/UL in which the link direction of the resource allocation indicated by the BS is different. It is not expected that a collision with a link direction indicated by a semi-static DL/UL configuration or a slot format indicator (SFI) will occur. For example, in some scenarios, the UE does not expect a symbol indicated as UL by semi-static DL/UL configuration or SFI DCI to be indicated as a downlink resource by DCI. As another example, in some scenarios, the UE does not expect a symbol indicated as a DL by semi-static DL/UL configuration or SFI DCI to be indicated as an uplink resource by DCI. In these scenarios, it is possible for the UE to fully trust the dynamically received uplink or downlink transmission instruction and perform an operation according to the corresponding instruction. In addition, in some scenarios, a resource region dynamically allocated by DCI is repeatedly used in a plurality of slots (e.g., a resource region dynamically allocated by DCI is applied to each of a plurality of consecutive slots) , For the initial transmission explicitly indicated by the DCI, the link direction of the initial transmission does not expect to collide with the link direction indicated by the semi-static DL/UL configuration or SFI, and the When repetitive transmission caused by DCI collides with a semi-static DL/UL configuration or a quasi-static DL/UL configuration or a link direction indicated by SFI, the UE performs the indicated operation except for the corresponding transmission/reception. Perform.

In some implementations of the present disclosure, the link direction indicated by semi-static DL/UL configuration may mean a link direction of DL or UL transmission configured by RRC signaling, system information, and/or UE-only RRC signaling. For example, link directions of symbols according to a TDD DL-UL pattern configured as UE-common or UE-only by RRC signaling may be link directions indicated by semi-static DL/UL configuration. As another example, a pattern of symbols invalid for DL/UL transmission by RRC signaling may be configured as UE-common or UE-only, and the link direction of symbols not invalid as DL/UL according to the pattern is semi-static It may be a link direction indicated by DL/UL configuration. When the BS provides the UE with a resource set that is not available for PDSCH or PUSCH (eg, through rate-matching pattern information), a DL not indicated as an invalid DL or UL symbol by the corresponding resource set Alternatively, the UL symbol may be a semi-statically configured DL/UL symbol.

Scenarios in which the BS allocates resources over a wide time domain including the slot boundary at once, and the UE or the BS performs transmission/reception only in a continuous and available resource period may be considered. . In these scenarios, it may be difficult for the BS to schedule transmission/reception by always avoiding unavailable resources. In other words, it may be difficult for the BS/UE to consider that available resources are always contiguous with each other even if the slot boundary is excluded. At this time, omitting the transmission/reception having a link direction different from the link direction of the resource indicated by the semi-static DL/UL configuration or the SFI among transmissions/receptions indicated by one scheduling by the BS It can cause a large performance degradation for transmission/reception. For example, the UE/BS divides the transmission duration of a total of 14 symbols into a transmission period of 10 symbols and a transmission period of 4 symbols in order to avoid slot boundaries, and the transmission duration of 10 symbols and 4 symbols In the case of performing transmission of the length, even if collision occurs in only one of the first 10 symbols, transmission is omitted in all of the 10 symbols and transmission is performed only in the latter four symbols. In the case of transmission where transmission reliability is important (eg, URLLC transmission), such performance degradation can be a major problem. This problem occurs not only when resource allocation including slot boundaries (hereinafter, multi-segment resource allocation), but also resource allocation for single transmission within a slot or multiple small resource allocations within a slot repeatedly used. I can. In order to avoid this problem, the present disclosure proposes a method of using for transmission using the remaining symbols excluding only some symbols without excluding the entire resource from transmission, even if some symbols of the symbols of the allocated resource are unusable. Hereinafter, implementations of the present disclosure are mainly described by taking multi-segment resource allocation as an example, but implementations of the present disclosure may be applied to other resource allocation methods.

When a plurality of configured uplink grants or DL SPS resources can be configured to the UE, excessive control signaling overhead may occur. For example, N times or more L1 signaling and/or higher layer signaling may be required to configure N resources. In particular, since URLLC requires high requirements, it is necessary to have high reliability of each L1 signaling and/or higher layer signaling, and in this case, PDCCH blocking due to control signaling overhead that occurs due to simultaneous use of a plurality of resources. ) Can be caused.

Accordingly, in the present disclosure, in order to allocate a plurality of resources that can be semi-statically allocated, such as an uplink grant or DL SPS resource set to a UE, a base station assigns a correlation relationship to a plurality of resources to reduce signaling overhead. Various examples for allocating a plurality of resources may be disclosed. Through the present disclosure, the UE may be allocated a plurality of quasi-static resources from the base station through one L1 signaling and/or higher layer signaling, and the base station may set or indicate and allocate these resources.

In the present disclosure, for convenience of explanation, various examples are described in terms of configured uplink grants mainly used for uplink, but the base station allocates a DL SPS to the UE or can be semi-static and/or semi-statically allocated. In order to allocate any resource to the UE, the present disclosure may be applied to any case in which the UE and the base station exchange L1 signaling and/or higher layer signaling. In addition, in the present disclosure, the term quasi-static resource configuration may be used as a term including higher layer configuration, higher layer configuration for the configured uplink grant resource, and SPS configuration.

12 is a flowchart of a method of transmitting and receiving physical shared channels (PUSCH, PDSCH) according to an example of the present disclosure.

Referring to FIG. 12, in S1201, a network (eg, a base station) may transmit a first quasi-static resource configuration and a second quasi-static resource configuration to a UE in order to configure a plurality of configured grants or DL SPS allocations. . In this case, each of the first semi-static resource setting and the second semi-static resource setting does not provide all parameters associated with a plurality of set grants or DL SPS assignments, but the first semi-static resource setting and The second semi-static resource setting may be to allocate a plurality of set grants or DL SPS assignments with a mutual correlation. Meanwhile, FIG. 12 is an example of a case in which two semi-static resource settings are provided for a plurality of set grants or DL SPS assignments, but a plurality of semi-static resource settings are set more than two semi-static resource settings. Or DL SPS assignments to the UE. The first quasi-static resource setting and the second quasi-static resource setting may be included in one higher layer message and transmitted/received at the same time, or may be transmitted/received at different times. The UE and the base station may know a plurality of configured grants or DL SPS assignments set to the UE based on the first quasi-static resource configuration and the second quasi-static resource configuration.

In S1203, the UE may transmit or receive a physical data channel (eg, PUSCH, PDSCH) using at least one of the plurality of configured grants or DL SPS assignments. In addition, the base station may transmit or receive the physical data channel of the UE based on a plurality of set grants or DL SPS assignments set to the UE.

Meanwhile, the first quasi-static resource configuration may be referred to as a reference quasi-static resource configuration or a UL grant parent configuration (hereinafter referred to as a parent configuration) in the following description, and the second quasi-static resource configuration may be referred to as other quasi-static resource configuration. -It may be a semi-static resource configuration referring to a static resource configuration or a UL grant child configuration (hereinafter referred to as a child configuration). Here, the quasi-static resource configuration referring to another quasi-static resource configuration may mean using a value for a specific parameter included in the referenced quasi-static resource configuration as it is.

As a more specific implementation of the method of transmitting/receiving a physical shared channel of FIG. 12, a physical network (eg, at least one base station) is configured with higher layer configuration(s) for a plurality of configured uplink grant resources (ie, semi-static resources). Configuration(s)) to the UE. At this time, each quasi-static resource setting may have an association relationship with each other and be defined. For example, when each quasi-static resource setting has a relationship with each other, one parent setting may be defined or set in association with a plurality of child settings.

In addition, child configuration and parent configuration may have different upper layer parameter structures. In particular, the child setting may not include some parameters included in the parent setting or may include other additional parameters.

Alternatively, when each quasi-static resource configuration has a correlation with each other, one quasi-static resource configuration may refer to another quasi-static resource configuration. The quasi-static resource configuration referring to other quasi-static resource configuration may be transmitted with some parameters excluded (omitted). For example, the excluded parameter may be a parameter referred to in the quasi-static resource configuration to which the referenced quasi-static resource configuration is referenced.

Alternatively, when each quasi-static resource configuration has a relationship with each other, one quasi-static resource configuration may set or indicate a plurality of resources. In other words, it can be said that one higher layer parameter set includes a plurality of quasi-static resource settings.

Alternatively, as another more specific implementation of the method for transmitting/receiving the physical shared channel of FIG. 12, the UE may receive a plurality of higher layer parameter sets for an uplink grant set from a network. On the other hand, if there is an association relationship between quasi-static resource settings, and parameters required for some resource allocation are excluded or not included in the quasi-static resource configuration, the UE inherits this from the parent configuration of the quasi-static resource configuration or Alternatively, the parameter can be referred to in the reference quasi-static resource setting. In addition, when referring to or inheriting a parameter, the UE may refer to a set or predefined offset, or apply it to a parameter of a parent setting.

Alternatively, as another more specific implementation of the method for transmitting/receiving the physical shared channel of FIG. 12, the network may transmit L1 signaling for uplink grant resources configured to the UE. In this case, the L1 signaling may be an activation/deactivation DCI of the configured uplink grant. Meanwhile, when the parent or the referenced quasi-static resource setting is activated/deactivated by the L1 signaling, the related child or the referenced quasi-static resource setting may also be activated/deactivated. In addition, when activation is performed through DCI including resource allocation information, such DCI is interpreted differently for each quasi-static resource setting, or DCI is associated with a plurality of radio resources and each of the radio resources is different. -Can also be applied to setting static resources.

In the specific implementations of FIG. 12 described above, the UE may perform UL transmission based on the plurality of (activated) configured uplink grants. Alternatively, when a plurality of DL SPSs are provided to the UE, the UE may transmit a HARQ-ACK for DL reception in SPS resources according to the plurality of DL SPSs.

In addition, the UE may transmit a HARQ-ACK for DL reception in SPS resources according to the plurality of (activated) DL SPS according to various examples of the present disclosure.

13 is a flowchart of an activation/deactivation operation for a plurality of set grants according to an example of the present disclosure.

Referring to FIG. 13, in S1301, the base station may transmit information for setting a plurality of configured grants to the UE.

In S1303, the base station issues one command (eg, DCI) for instructing activation/deactivation of some or all of the plurality of configured grants (or quasi-static resource configurations related to the plurality of configuration grants). Can be transmitted to the UE. The UE may activate or deactivate one or more quasi-static resource settings related to grants set according to a command from the base station. Alternatively, the UE may transmit HARQ-ACK feedback for the command based on Examples 1 to 7 to be described later. The UE may transmit or receive data by using radio resources according to quasi-static resource configuration related to activated configured grants.

Meanwhile, the operation of FIG. 13 may be applied together with the operation of FIG. 12. For example, the plurality of set grants may be set according to the operation of FIG. 12 (or Examples 1 to 7 to be described later related to the operation of FIG. 12 ). Alternatively, the operation of FIG. 13 (or Examples 1 to 7 to be described later related to the operation of FIG. 13) may be applied independently from the operation of FIG. 12.

In FIGS. 12 and 13, the UE may receive higher layer configuration(s) for a plurality of configured uplink grants from a base station. In this case, the quasi-static resource setting(s) may include parameters for a plurality of resources, and a plurality of quasi-static resource configurations may have a relationship with each other. The base station may activate/deactivate a radio resource for another quasi-static resource configuration having an association relationship by activating/deactivating a radio resource for one quasi-static resource configuration having an association relationship.

Alternatively, if one quasi-static resource setting can set or indicate a plurality of resources through a plurality of parameters, the base station performs activation/deactivation of the one quasi-static resource setting, thereby allowing a plurality of resources to be It can be activated/deactivated. Accordingly, since a plurality of radio resources can be indicated, set, or activated/deactivated through one signaling, the above-described signaling overhead problem can be solved.

<Example 1>

According to an example of the present disclosure, the UE transmits a quasi-static resource (or, a quasi-static resource (configured resource)) such as an uplink grant PUSCH or DL SPS PDSCH configured from a base station through L1 signaling and/or higher layer signaling. When set, at least one of the parameters related to the quasi-static resource may have a plurality of parameter values related to the parameter. In this case, the UE may assume that a plurality of quasi-static resources have been set or have been set in consideration of options 1 to 3 below.

* Option 1

According to option 1, the UE may assume a plurality of quasi-static resources as many as the number of parameters set from the base station can be combined. For example, if parameter X has X1, X2 values and parameter Y is set to have Y1, Y2, Y3 values, all possible combinations of each parameter values of the parameters X and Y ({X1, Y1}, { It can be assumed that six semi-static resources that can be set based on X1, Y2}, {X1, Y3}, {X2, Y1}, {X2, Y2}, {X1, Y3}) are set to the UE. In this case, the combination of nth parameter values (where n is a natural number) may be applied to the nth quasi-static resource.

* Option 2

According to option 2, when a parameter including the largest number of parameter values among a plurality of parameters set to the UE has K parameter values, the UE may assume a combination of K parameter values, and the K parameters It is possible to assume K quasi-static resources associated with a combination of values. Here, the combination of K parameter values assumed by the UE may be a combination of parameter values of each parameter. Specifically, parameter values of each parameter included in the plurality of parameters may each have an index. The UE may assume a combination of parameter values corresponding to the same index based on the index, and the combination of parameter values in the nth order may be applied to the nth quasi-static resource.

For example, if a plurality of parameters are X and Y, X has X1, X2 values, and Y is set to have Y1, Y2, Y3 values, the UE is a combination of three parameter values {X1, Y1}, We can assume {X2, Y2} and {A, Y3}. However, in this case (when the number of parameter values of each parameter does not match), it may be a question of what value A is to be assumed in the combination of the parameter values. In other words, assuming a combination of parameter values sequentially from a lower index, a parameter value (Y3 in the example) corresponding to a parameter (Y in the example) having a larger number of parameter values exists, but a smaller number A case in which a parameter value (A in the above example) corresponding to a parameter having parameter values (X in the above example) is defined or not set may be problematic.

In this case, the UE may use the A value as the last value (X2 in the example), the first value (X1 in the example), or a default value (a value defined or set separately) among parameter values set for the parameter. For example, in the above example, when the UE assumes the A value as the last value among the parameter values set for the parameter, the combination of parameter values is assumed to be {X1, Y1}, {X2, Y2}, {X2, Y3}. In addition, it may be assumed that three quasi-static resources corresponding to combinations of respective parameter values are set.

<Example 2>

When a UE is configured with a quasi-static resource such as an uplink grant PUSCH or a DL SPS PDSCH set from a base station, a plurality of quasi-static resource configurations may be instructed from the base station. At this time, each quasi-static resource setting setting may be defined by an association relationship with each other.

As an implementation of Example 2, there may be one parent setting and a plurality of child settings associated therewith. In this case, the child setting and the parent setting may have different upper layer parameter structures. In particular, the child setting may not include some parameters included in the parent setting or may include other additional parameters.

Alternatively, the child configuration may have a separate child configuration property/structure (property/structure) other than the parent configuration (eg, set grant type 1 and type 2). In this case, the UE assumes that there is no separate quasi-static resource associated with the child configuration, and the child configuration can be used to change the quasi-static resource associated with the parent configuration. That is, the child configuration may be for allowing the UE to use or change the resource allocated by the parent configuration of the child configuration as it is. For example, the child configuration may use the same MCS/TBS (transport block size) value as the parent configuration, the same RB size, or the same DMRS configuration.

According to the implementation of Example 2, the complexity and signaling overhead of the UE can be reduced by not allocating resources for each parent configuration and child configuration.

As another implementation of Example 2, one semi-static resource setting may refer to another semi-static resource setting. In this case, the quasi-static resource configuration referring to other quasi-static resource configuration may be transmitted by excluding some parameters.

On the other hand, when there is an association relationship between quasi-static resource settings as in the above implementations, if a parameter required for resource allocation is excluded or the parameter is not included in the quasi-static resource configuration, the parameter is set as a parent. The parameter may be inherited from or referenced in the reference quasi-static resource setting. When one quasi-static resource configuration refers to a parameter of another quasi-static resource configuration or inherits a parameter from a parent configuration, the UE is configured from the base station or a predefined offset for the one quasi-static resource configuration. Can be applied. For example, when a child setting refers to a parameter of another semi-static resource setting or inherits a parameter from a parent setting, if the parameter value of the parent setting is X, the child setting is X+alpha (where alpha is the offset ) Can be used as a value for the parameter.

In other words, a quasi-static resource configuration having an association relationship such as a child configuration or a quasi-static resource configuration referring to another quasi-static resource configuration may not include some parameters or may be transmitted by excluding some parameters. When some of the parameters are used as parameter values in other semi-static resource configuration or when a default value is applied to some of the parameters, an offset value that can be applied may be additionally set or indicated to the UE.

<Example 3>

The base station configures/releases the quasi-static resource through L1 signaling (e.g., activation/deactivation DCI) indicating the location of the time/frequency resource and the upper layer setting that sets the period of the quasi-static resource to the UE. In this case, the UE may apply the DCI to a plurality of quasi-static resource settings or parameter sets when applying the activation/deactivation DCI from the base station.

Specifically, as in Example 2, there is an association relationship between quasi-static resource configuration or higher layer parameter sets, one quasi-static resource configuration refers to another quasi-static resource configuration, or one or a plurality of quasi- A group/state that may include static resource settings may be set or indicated to the UE. Activation/activation for one of the quasi-static resource configurations and/or the referenced quasi-static resource configuration and/or the quasi-static resource configuration included in the group/status and/or the group/state with the above-described association When receiving the release DCI from the base station, the control information (e.g., time/frequency resource information) indicated by the activated DCI is set to the one and/or the referenced quasi-static resource and/or the quasi-static resource setting and/or the group/state included. -Static resource settings and/or all other quasi-static resource settings related to the group/status or all quasi-static resource settings included in the group/state (all quasi-static resource settings set/indicated by the group/state) Static resource settings).

In addition, when the control information indicated by the activation DCI is used, the UE sets a quasi-static resource associated with the activated DCI or a quasi-static resource setting associated with the activated DCI by setting a predetermined offset from the base station or It can be used by applying to setting up related quasi-static resources.

Meanwhile, the deactivation DCI may also be used in all other quasi-static resource configurations having the above-described association or all quasi-static resource configurations set/instructed in the group/state associated with the deactivation DCI. In other words, the quasi-static resources of all other quasi-static resource configurations associated with each other or all quasi-static resource configurations set/instructed in the group/state associated with the deactivation DCI may be released.

<Example 4>

When one message (e.g., activation DCI, setting for a set grant and/or SPS setting) can indicate or set a plurality of time/frequency resources, especially a plurality of TDRAs, the base station Using resource allocation (eg, a plurality of TDRAs), a plurality of quasi-static resources may be indicated or set to the UE, and transmission/reception may be performed on the corresponding resource. The UE can also set or receive a plurality of quasi-static resources in the same way and perform transmission/reception on the corresponding resource. That is, TDRA may be used for quasi-static resource allocation. In this case, the plurality of TDRAs may be indicated by one TDRA item. Alternatively, the plurality of TDRAs may be respectively indicated by a plurality of TDRAs items (respectively).

Specifically, when one message instructs or sets N TDRAs (T0, T1, …, T(N-1)) to the UE, the UE may indicate or receive one semi-static resource for each TDRA. And, accordingly, a total of N quasi-static resources may be assumed, indicated, or set.

14 illustrates quasi-static resources according to an example of the present disclosure.

Referring to FIG. 14A, a UE may receive an indication from a base station of four TDRAs (T0, T1, T2, T3) included in one TDRA item. Referring to FIG.14B, the UE can interpret that one quasi-static resource is instructed from each indicated TDRA, and accordingly, a total of 4 quasi-static resources are allocated from the base station to the UE through each TDRA. can do.

For example, when the start symbol S and the number of symbols L for the PDSCH (or PUSCH) are given by each TDRA, the UE receiving one message indicating or setting 4 TDRAs is 4 based on the 4 TDRAs. You can get (S, L) pairs of dogs. Based on the (S, L) pair, four quasi-static resources (resource #0, resource #1, resource #2, resource #3) may be set, respectively.

On the other hand, when the UE is allocated quasi-static resources from the base station through TDRA, the UE applies additional elements and/or parameters to the given TDRA, and uses a plurality of TDRAs based on quasi-static resources related to the given TDRA. Alternatively, a TDRA different from the TDRA given above may be used. For example, assume that (S, L) pair #0 is associated with TDRA T0, and semi-static resource #0 using time domain resources according to the (S, L) pair #0 can be set to the UE In this case, if the TDRA T0 is instructed to the UE, the UE may assume/consider that the quasi-static resource #0 is periodically generated with a period set for the quasi-static resource #0.

If additional elements and/or parameters are applied to the TDRA T0, when the quasi-static resource #0 occurs, a physical data channel (e.g., PDSCH, PUSCH) may not be transmitted/received only once, but transmitted/received multiple times. Can be. Since a plurality of transmissions/receptions for the physical data channel are performed at different locations in the time domain, the plurality of transmissions/receptions may be regarded as being performed using different TDRAs. At this time, when the quasi-static resource #0 occurs the N-th time (occasion), the UE applies an additional element and/or parameter to the TDRA T0 to transmit/transmit the physical data channel multiple times, the quasi-static resource # There is a difference from transmitting/receiving a physical data channel at different occurrence times of 0 (eg, Nth, N+1th, ... occurrence timing).

In FIG. 14B, since additional elements and/or parameters are applied to the TDRA, a given TDRA for a specific quasi-static resource is repeated in a back-to-back form, so that time resources of the same length may be repeatedly used.

Meanwhile, the following methods may be considered when applying additional elements and/or parameters to TDRA.

-As an example, by setting a quasi-static resource associated with each quasi-static resource, or by setting a quasi-static resource associated with a message indicating or setting a TDRA, or repeatedly transmitted by a message indicating or setting a TDRA Arguments can be indicated or set. In this case, each quasi-static resource may be allocated by applying the repetitive transmission factor to a given TDRA.

-Alternatively, the number of repetitive transmissions performed in each quasi-static resource may be the same as the number of TDRAs included in the message indicating TDRA(s). In other words, when one message indicates or configures N TDRAs (T0, T1,...,T(N-1)), the UE indicates or sets one semi-static resource through each TDRA and receives a total of N Assuming four quasi-static resources, and assuming and applying a repetitive transmission factor N for a given TDRA, each quasi-static resource may be allocated. In FIG. 14B, for resource #0, which is a semi-static resource set by TDRA T0, four TDRAs including TDRA T0 may be used based on TDRA T0. Here, the four TDRA sets based on TDRA T0 may be obtained by applying additional elements and parameters to TDRA T0, and in this case, a set of T0, T1, T2, T3 indicated by one message as shown in FIG. 14A and Can be different.

-Alternatively, the application of the repetition transmission factor is indicated by reference to a table to which the repetition transmission factor is mapped, or is repeated N times in a symbol-level, N times in a slot-level, or Repeated transmission of a set size/quantity/number may be performed.

-Or, by applying the repetition transmission factor, the UE may change the TDRA given to each quasi-static resource. For example, the start symbol S and/or the number of symbols L associated with the TDRA may be multiplied or added by N.

Alternatively, the repetitive transmission factor may be indicated or set separately from a parameter that may be used to indicate dynamic scheduling or a plurality of TDRAs.

On the other hand, the message indicating the plurality of time/frequency resources of Example 4 may directly deliver a plurality of TDRAs, or indicate a single index and a plurality of TDRAs are explicitly or implicit in the table mapped to the index. It can also be indicated as.

<Example 5>

According to an example of the present disclosure, when a UE is configured with a quasi-static resource such as an uplink grant PUSCH or a DL SPS PDSCH set from a base station, a plurality of quasi-static resources may be indicated through one L1 signaling. In this case, the base station may set a state in which specific quasi-static resource configuration is activated to the UE. For example, for N quasi-static resource settings that the base station can (or set) to the UE, the base station can set K states to the UE. Each state may indicate which of the N quasi-static resource configurations, which quasi-static resource configuration is activated and/or which quasi-static resource configuration is deactivated. Accordingly, since the size of the DCI field can be determined regardless of the number of configurable quasi-static resource configurations, DCI reception performance may not be degraded even when a plurality of quasi-static resource configurations are used.

According to the implementation of Example 5, the base station provides the UE through L1 signaling (e.g., activation/deactivation DCI) indicating the upper layer configuration for setting the period of the quasi-static resource and the location of the time/frequency resource. -In case of setting/releasing the static resource, the base station may include the above state in the L1 signaling transmitted to the UE. Accordingly, the UE may apply activation/deactivation DCI to a plurality of quasi-static resource settings or parameter sets. The state may be transmitted through a separate field included in the DCI, or may be transmitted by reusing an existing field.

According to another implementation of Example 5, when each quasi-static resource configuration has a configuration index, and the configuration index is a unique value representing the quasi-static resource configuration, one state is the configuration. It can contain multiple indexes. When the UE receives the indication of the one state through L1 signaling, it may perform at least one of the following operations.

-When receiving the activation message, the UE may activate the semi-static resource setting included in the one state.

-When receiving the activation message, the UE may deactivate/release the quasi-static resource configuration not included in the one state.

-When receiving the deactivation message, the UE may deactivate/release the quasi-static resource configuration included in the one state.

Meanwhile, the UE may not separately distinguish between the activation DCI and the deactivation DCI of the quasi-static resource. In other words, the activation DCI and the deactivation DCI may have the same special field for validation of the PDCCH, and the UE may determine whether to perform activation/deactivation based on the state.

According to another implementation of Example 5, when each quasi-static resource configuration has a configuration index, and the configuration index is a unique value representing the quasi-static resource configuration, one state is for each configuration index. Activation/deactivation can be indicated. In this case, the UE may not separately distinguish between the activation DCI of the quasi-static resource and the deactivation DCI. In other words, the activation DCI and the deactivation DCI may have the same special field for validating the PDCCH, and the UE may determine whether to perform activation/deactivation through the state.

According to another implementation of Example 5, when one state includes a plurality of quasi-static resource configurations or indexes of a plurality of quasi-static resource configurations, the state is one or more for each quasi-static resource configuration. It may include two parameter offsets together. The parameter offset is applied to a higher layer parameter transmitted from the base station to the UE through quasi-static resource configuration, or information used to activate quasi-static resource configuration indicated through activation DCI (e.g., TDRA, FDRA , MCS). In addition, each parameter offset may be applied to one parameter or information (eg, TDRA, FDRA, MCS).

When the quasi-static resource setting indicated through the state is activated, the UE may apply the parameter offset. For example, when a state delivered through the activation DCI activates a specific quasi-static resource setting A, the value of information related to the specific quasi-static resource setting or the explicit information delivered through the activation DCI is When X and the parameter offset indicated through the state is K, the UE may assume and use the value of the information as an X+K value instead of an X value when activating the semi-static resource configuration A through the state. .

<Example 6>

When the UE receives the DL SPS PDSCH from the base station, the UE needs to transmit HARQ-ACK for each PDSCH reception. In other words, the UE needs to transmit a HARQ-ACK for PDSCH reception of SPS resources that occur periodically. At this time, when the UE is allocated DL SPS resources through the activation DCI, the HARQ-ACK feedback for the first SPS resource explicitly indicated by the activation DCI (that is, the SPS resource of the first period) is indicated through the activation DCI. For a periodic SPS transmission resource that is transmitted through an established PUCCH resource and occurs every set period after the first SPS resource, a PUCCH resource set as a higher layer parameter may be used.

On the other hand, when the UE is configured with a quasi-static resource such as an uplink grant PUSCH or a DL SPS PDSCH set from a base station, a plurality of DL SPS resources may be indicated through one L1 signaling (eg, activated DCI). That is, one activated PDCCH may indicate DL allocation of a plurality of SPS PDSCHs, and in this case, a plurality of SPS PDSCHs may be activated by the one PDCCH.

At this time, the UE needs to transmit HARQ-ACK for each activated DL SPS resource. In this case, the UE and the base station may operate in consideration of options 1 to 4 below.

* Option 1

In option 1, for the SPS resource that is the most advanced in the time domain among a plurality of SPS resources associated with a plurality of SPS configurations indicated through one activation DCI, the UE and the base station HARQ through the PUCCH resource indicated by the activation DCI. It can be assumed that -ACK feedback is transmitted. In other words, HARQ-ACK feedback for the SPS PDSCH that is first received in the time domain among a plurality of SPS PDSCHs activated based on the activated PDCCH may be transmitted through the PUCCH indicated by the one activated PDCCH.

Meanwhile, for other SPS resources (remaining SPS resources excluding the most advanced SPS resource among the plurality of SPS resources), PUCCH indicated by the SPS configuration associated with each SPS resource (ie, PUCCH indicated through higher layer signaling) It may be assumed that HARQ-ACK feedback is transmitted using preferentially. In other words, among a plurality of SPS PDSCHs activated based on the activated PDCCH, HARQ-ACK feedback for the remaining SPS PDSCHs except for the SPS PDSCH received first in the time domain may be transmitted through the PUCCH indicated through RRC signaling. have.

* Option 2

In option 2, the UE and the base station are the first SPS resource of each SPS configuration among a plurality of SPS resources associated with a plurality of SPS configurations indicated by the UE through one activation DCI (i.e., of the first period of each SPS configuration). SPS resource) may be assumed to transmit HARQ-ACK feedback through the PUCCH resource indicated by the activation DCI. Here, each of the plurality of SPS configurations may include information on a period in which the SPS PDSCH associated with the SPS configuration is received. That is, the HARQ-ACK response to the SPS PDSCH that is first received in periods associated with each SPS configuration may be transmitted through the PUCCH indicated by the activated PDCCH.

Meanwhile, for other SPS resources (SPS resources other than the first SPS resource of each SPS configuration among a plurality of SPS resources associated with a plurality of SPS configurations), the UE and the base station are indicated by the SPS configuration associated with each SPS resource. It may be assumed that HARQ-ACK feedback is transmitted using PUCCH (ie, PUCCH indicated through higher layer signaling). In other words, the HARQ-ACK response to the SPS PDSCH received after the first SPS PDSCH received in periods associated with each SPS configuration may be transmitted through the PUCCH indicated through RRC signaling.

* Option 3

In option 3, for a plurality of SPS resources associated with a plurality of SPS configurations indicated through one activation DCI, the UE and the base station are always PUCCH indicated by the SPS configuration associated with each SPS resource (i.e., higher layer signaling It may be assumed that HARQ-ACK feedback is transmitted by preferentially using PUCCH) indicated through. In other words, the UE and the base station ignore the PUCCH resource indicated by the activation DCI and always use the PUCCH indicated through each SPS configuration (i.e., RRC signaling) for transmitting and receiving HARQ-ACK feedback for a plurality of SPS PDSCHs. Can be expected.

* Option 4

In option 4, indicated by a specific SPS resource and an activation DCI among the first SPS resources associated with each of a plurality of SPS settings indicated through one activation DCI (ie, SPS resources of the first period associated with each SPS setting) It is assumed that HARQ-ACK feedback of the first SPS resource of all the indicated SPS configurations is transmitted through the PUCCH resource determined based on the determined information. Here, each of the plurality of SPS configurations may include information on a period in which the SPS PDSCH associated with the SPS configuration is received. That is, the HARQ-ACK response to the SPS PDSCH received first in the periods associated with each SPS configuration is a predetermined SPS resource and activation among SPS resources associated with the SPS PDSCH received first in the periods associated with each SPS configuration. It may be transmitted through a PUCCH resource determined based on information indicated by the PDCCH.

On the other hand, it is assumed that HARQ-ACK feedback is transmitted by preferentially using the PUCCH indicated by the SPS configuration associated with each resource for periodic SPS resources that occur at each later set period. In this case, the specific SPS resource of option 4 may be a resource determined based on the following implementations.

-The specific SPS resource may be a resource located first in a time domain among first SPS resources associated with each of the plurality of SPS configurations. Accordingly, the base station can quickly know whether or not the activated DCI has been successfully received.

Alternatively, the specific SPS resource may be the latest resource in the time domain among first SPS resources associated with each of a plurality of SPS configurations. Accordingly, the processing time of the UE may be guaranteed, and the scheduling complexity of the base station may be reduced.

Alternatively, the specific SPS resource may be a resource having the lowest or highest index of the associated configuration (ie, the configuration index of each SPS configuration). Since the UE can be explicitly instructed to use the PUCCH through the configuration index, the complexity of implementing the base station and the UE can be reduced. In this case, the setting index may be a group index or an intra-group setting index.

Alternatively, the specific SPS resource may be an SPS resource associated with a reference quasi-static resource configuration predetermined in an associated configuration group (eg, a predetermined configuration group or a configuration group indicated by a base station).

-Alternatively, the specific SPS resource may be an SPS resource associated with the parent setting of another semi-static resource setting.

-Alternatively, the specific SPS resource may be an SPS resource associated with the reference quasi-static resource configuration referenced by the most quasi-static resource configuration when there is a reference relationship between different quasi-static resource configurations.

Alternatively, the specific SPS resource may be an SPS resource when an associated PUCCH resource (ie, a PUCCH resource indicated by each SPS configuration) precedes the time domain. Accordingly, the base station can quickly know whether or not the activated DCI has been successfully received.

Alternatively, the specific SPS resource may be the latest resource in the time domain in which the associated PUCCH resource (ie, the PUCCH resource indicated by each SPS configuration) is the latest. Accordingly, the processing time of the UE can be guaranteed, and the scheduling complexity of the base station can be reduced.

Meanwhile, when the UE receives the activation DCI for a specific SPS configuration, the response associated with the SPS deactivation DCI may be transmitted using the same transmission method as the method of transmitting the HARQ-ACK response associated with the activated DCI. In other words, the method of transmitting the HARQ-ACK bit explicitly indicated by the activated DCI when receiving the activated DCI and the method of transmitting the response to the SPS deactivation DCI may be the same. For example, various implementations of Example 6 may be used to transmit the response associated with the SPS deactivation DCI.

When the UE and the base station determine the PUCCH resource associated with a specific SPS resource using the PUCCH resource indicator indicated in the activation DCI or SPS configuration, the PDSCH-to-HARQ_feedback timing indicator (PDSCH-to-HARQ feedback timing indicator) is A value indicated for the SPS configuration may be used through the activation DCI in advance, a value applied to the specific SPS resource may be used, or a value defined/promised/set in advance by the base station may be used. In this case, the implementation of Example 7 below may be applied when determining the value of the PDSCH-to-HARQ_feedback timing indicator.

<Example 7>

When the UE deactivates the SPS PDSCH set from the base station, the UE needs to transmit a response to the SPS deactivation reception in order to perform the same operation as the base station. For example, when the UE releases the SPS resource through the deactivation DCI received from the base station, in the resource or PUCCH resource related to the time period indicated by the deactivation DCI, the UE uses the HARQ-ACK bit associated with the SPS resource. And transmits a response to deactivation of the SPS (type-1 codebook), or by using the HARQ-ACK bit position indicated by the deactivation DCI (type-2 codebook) A response to SPS deactivation may be transmitted.

On the other hand, even when the UE is instructed to release a plurality of SPS resources from the base station through one L1 signaling (e.g., deactivation DCI), the UE transmits a response to each released DL SPS resource or deactivation DCI. There is a need. In this case, the UE and the base station may operate in consideration of options 1 to 2 below.

* Option 1

In option 1, the UE and the base station transmit a response to the deactivation DCI in separate HARQ-ACK bits for the configuration of a plurality of SPSs in which the UE is instructed to release through one deactivation DCI. Accordingly, even if a plurality of quasi-static resource configurations are set to the UE, each quasi-static resource configuration can be individually applied, and also the quasi-static resource configuration desired by the UE and the base station while maintaining the HARQ-ACK configuration method of the UE Can be applied.

* Option 2

In option 2, the UE and the base station may transmit a response to the deactivation DCI in one HARQ-ACK bit for a plurality of SPS configurations in which the UE is instructed to release through one deactivation DCI. Through option 2, even if a plurality of quasi-static resource settings (e.g., SPS settings) are released at the same time, a response to SPS deactivation can be transmitted using one transmission and one HARQ-ACK bit. Head and scheduling restrictions can be reduced.

According to another implementation of Example 7, it is necessary to release a plurality of SPS settings with one deactivation DCI in Option 1 and transmit a plurality of SPS deactivation responses to the released SPS settings. At this time, PUCCH resources to transmit the response based on information (e.g., SPS-config, activation DCI) and information indicated by the deactivation DCI for the SPS PDSCH associated with each released SPS configuration In the PUCCH resource determination method for selecting, the UE and the base station may consider the following options 1A to 3A.

* Option 1A

In option 1A, the UE and the base station may assume that the UE determines the PUCCH resource using the same PUCCH resource determination method for each of the released SPS settings.

* Option 2A

In Option 2A, the UE and the base station determine the PUCCH resource determination method used by the UE for the configuration associated with the SPS resource located first in the time domain after the deactivation DCI reception among the released SPS configurations, and other SPS configurations. For example, it may be assumed that the PUCCH resource determination method used by the UE is different.

* Option 3A

In option 3A, the UE and the base station have SPS resources located after the deactivation DCI reception point in the time domain among a plurality of SPS configurations indicated through one deactivation DCI and the PUCCH resource determined using a specific PUCCH resource determination method in the time domain. For the most advanced SPS configuration in the above, it may be assumed that a response to SPS deactivation is transmitted using the PUCCH resource. In addition, the UE and the base station may assume that the PUCCH resource determination method used for different SPS configurations is different from the specific PUCCH resource determination method.

Meanwhile, for the PUCCH resource determination method of options 1A to 3A, various implementations related to the PUCCH resource determination method to be described later may be applied.

According to another implementation of Example 7, in the case of using the option 1 or the option 2, in order to transmit responses for deactivation of each SPS configuration to one radio resource, one capable of transmitting the HARQ-ACK bit There is a need to select radio resources. For this, the following option 1B may be considered.

* Option 1B

In option 1B, the UE and the base station are the first of each of the plurality of SPS configurations located after the deactivation DCI reception point in the time domain among a plurality of SPS resources associated with a plurality of SPS configurations indicated through one deactivation DCI. It may be assumed that the UE transmits a response to SPS deactivation of all the indicated SPS configurations through a PUCCH resource determined based on a specific SPS resource among SPS resources. Meanwhile, the following items may be additionally considered in Option 1B.

-The specific SPS resource may be the most advanced resource in the time domain. Accordingly, the base station can quickly know whether the reception of the deactivation DCI is successful.

-Alternatively, the specific SPS resource may be the latest resource in the time domain. Accordingly, the processing time of the UE can be guaranteed, and the scheduling complexity of the base station can be reduced.

Alternatively, the specific SPS resource may be the lowest resource or the highest resource in the index of the associated configuration (ie, the configuration index for each SPS configuration). Since the UE can be explicitly instructed to use the PUCCH through the configuration index, the complexity of implementing the base station and the UE can be reduced. In this case, the setting index may be a group index or an intra-group setting index.

Alternatively, the specific SPS resource may be an SPS resource associated with a reference quasi-static resource configuration predetermined in an associated configuration group (eg, a predetermined configuration group or a configuration group indicated by a base station).

-Alternatively, the specific SPS resource may be an SPS resource associated with the parent setting of another semi-static resource setting.

-Or, the specific SPS resource may be an SPS resource associated with the reference quasi-static resource configuration referenced by the most quasi-static resource configuration when there is a reference relationship between different quasi-static resource configurations.

Alternatively, the specific SPS resource may be an SPS resource when an associated PUCCH resource (ie, a PUCCH resource indicated by each SPS configuration) precedes the time domain. Accordingly, the base station can quickly know whether or not the activated DCI has been successfully received.

Alternatively, the specific SPS resource may be the latest resource in the time domain in which the associated PUCCH resource (ie, the PUCCH resource indicated by each SPS configuration) is the latest. Accordingly, the processing time of the UE can be guaranteed, and the scheduling complexity of the base station can be reduced.

The UE and the base station may determine a PUCCH resource to be used to transmit an SPS deactivation response based on the specific SPS resource and SPS configuration and/or deactivation DCI. The PUCCH resource indicator or PDSCH-to-HARQ feedback timing indicator used to determine the PUCCH resource based on the specific SPS resource uses a value indicated through deactivation DCI, or in advance through activation DCI. A value indicated for, or a value applied to the specific SPS resource may be used, or a value defined/promised/set in advance by the base station may be used. In this case, the following implementation may be applied when determining the value of the PUCCH resource indicator or the PDSCH-to-HARQ_feedback timing indicator.

According to another implementation of Example 7, when the UE selects the HARQ-ACK bit position and/or PUCCH resource for the PDSCH, the TDRA of the PDSCH, the PDSCH-to-HARQ feedback timing indicator and the PUCCH resource indicator You may need information. In addition, in order to transmit a response to SPS deactivation, the UE may use a reference TDRA obtained by assuming DCI reception timing and TDRA information instead of the TDRA of the PDSCH.

The base station may deliver a plurality of L1 signaling and/or higher layer signaling to the UE for SPS PDSCH allocation. For example, SPS configuration for preliminary resource configuration and activation DCI for resource allocation may be transmitted from the base station to the UE. In addition, SPS deactivation DCI can also be delivered for SPS deactivation. The UE may obtain a plurality of PDSCH TDRAs, PDSCH-to-HARQ feedback timing indicators and PUCCH resource indicators through the plurality of L1 signaling and/or higher layer signaling.

Meanwhile, in Example 7, HARQ-ACK bits and PUCCH resources for transmitting a response to SPS deactivation need to be selected. In this case, as described above, when the UE acquires a plurality of pieces of information for one SPS configuration, it may be ambiguous what information to apply. Accordingly, when the plurality of pieces of information are given to the UE, a PUCCH resource determination method for determining the HARQ-ACK bit position and PUCCH resource may be required.

Specifically, the PUCCH resource determination method may be a method of deriving the following values based on information indicated or set in advance (eg, SPS-config, activation DCI) and information indicated by deactivation DCI.

-PDSCH-to-HARQ feedback timing indicator (K1)

-PUCCH resource indicator (PRI)

-DAI (downlink assignment index)

-Reference PDSCH or DCI reception timing and TDRA information for applying the PDSCH-to-HARQ feedback timing indicator (reference TDRA)

In this case, the following methods may be considered to determine the value of each information according to the type of codebook used by the UE (dynamic or static, type-1 or type-2).

-When using a type-1 codebook or a type-2 codebook

- Reference TDRA

--- As an example, a TDRA that has been instructed together based on the time of receiving the SPS deactivation DCI may be determined as the reference TDRA.

--- Alternatively, the TDRA indicated through the SPS activation DCI may be determined as the reference TDRA based on the time when the SPS deactivation DCI is received. In this case, K0 (PDCCH-to-PDSCH) indicated by the TDRA may be ignored. In other words, K0 can always be zero.

--- Or, a specific SPS PDSCH located after the time domain SPS deactivation DCI is received may be determined as the reference TDRA. In this case, a specific SPS PDSCH among the SPS PDSCHs after a predetermined time after the SPS deactivation DCI is received may be determined as the reference TDRA in consideration of UE processing time for deactivation DCI.

- K1

--- As an example, the PDSCH-to-HARQ feedback timing indicator indicated through the SPS deactivation DCI may be used.

--- Or, the PDSCH-to-HARQ feedback timing indicator indicated through the SPS activation DCI may be used.

- PRI

--- As an example, the PUCCH resource indicator indicated through the SPS deactivation DCI may be used.

--- Or, the PUCCH resource indicator indicated through the SPS activation DCI may be used.

--- Or, a PUCCH resource indicator configured through a higher layer SPS configuration (eg, SPS-config) may be used.

-When using a type-2 codebook

- DAI

--- As an example, DAI directed through the SPS deactivation DCI may be used.

Meanwhile, information used to determine a PUCCH resource to be used for transmission and information used to determine a HARQ-ACK bit position in the PUCCH during PUCCH transmission may be different from each other. Specifically, the following examples may be considered.

-As an example, the HARQ-ACK bit and/or PUCCH determined through the TDRA (DCI field and/or DCI reception timing) indicated by the deactivation DCI, the PUCCH resource indicator and the PDSCH-to-HARQ feedback timing indicator may be used. have.

-Alternatively, the temporal position of a specific SPS PDSCH located after the deactivation DCI reception point in the time domain and the HARQ-ACK bit determined through the PUCCH resource indicator and the PDSCH-to-HARQ feedback timing indicator included in the deactivation DCI and/or PUCCH Can be used.

-Or, a PUCCH resource indicator indicated by the deactivation DCI, a HARQ-ACK bit determined through a PDSCH-to-HARQ feedback timing indicator given in a TDRA (DCI field and/or DCI reception timing) and a pre-activated DCI and/or PUCCH can be used.

In the process of selecting the plurality of pieces of information by the UE, by selecting information transmitted through deactivation DCI, it may be possible for the base station to dynamically determine a resource for transmitting a response of SPS deactivation.

In addition, by selecting information transmitted through activation DCI or SPS configuration in the process of selecting the plurality of pieces of information by the UE, the payload size of the deactivation DCI can be reduced, and when the deactivation DCI is missed (missing) ( For example, it is possible to resolve the ambiguity that occurs when the deactivation DCI is not received.

<Example 8>

When a UE is configured with a quasi-static resource such as an uplink grant PUSCH or a DL SPS PDSCH set from a base station, a plurality of quasi-static resources may be indicated through one L1 signaling (eg, DCI or activated DCI).

In addition, a plurality of quasi-static resource settings associated with a plurality of quasi-static resources may be indicated through L1 signaling. To this end, for example, the base station indicates a bitmap of a configuration index (related to quasi-static resource configuration), a group index (related to quasi-static resource configuration), or a preset state of quasi-static resource configuration. A plurality of quasi-static resource settings may be indicated by instructing such as.

In this case, the quasi-static resource setting or the like may change the configuration and interpretation of the information field of L1 signaling. For example, quasi-static resource configuration having different resource allocation types may have different bit lengths and interpretations of the FDRA field. This means that even if the bit size is matched to one reference length, information interpretation of L1 signaling by the UE may be performed individually for each quasi-static resource configuration.

Meanwhile, in the method of interpreting one DCI based on a plurality of quasi-static resource configurations, it is difficult to indicate a desired value according to each quasi-static resource configuration, and the UE must interpret the DCI by referring to a plurality of parameters. Therefore, it is possible to greatly increase the complexity of the UE in implementing the operation of the UE.

Therefore, in order to solve this problem, when the UE receives a quasi-static resource(s) for a plurality of quasi-static resource settings from a base station with one L1 signaling (e.g., activated DCI), the UE Accordingly, a specific DCI may not be expected or may be assumed as an error case (eg, CRC checksum failure) and the specific DCI may not be used.

Specifically, according to the implementation of Example 8, when the UE receives a quasi-static resource(s) for a plurality of quasi-static resource settings from a base station by one L1 signaling (eg, activated DCI), the indicated It can be expected that the DCI analysis result and/or the interpretation method and/or the DCI field size determined by the parameter set set in the plurality of quasi-static resource settings will always be the same.

Alternatively, the UE may expect that DCI interpretation and/or quasi-static resource configurations having different DCI field sizes are not indicated to DCI. When a plurality of quasi-static resource settings that cause different DCI interpretation results and/or interpretation methods and/or DCI field size are indicated through one DCI, the single DCI is used as an error case such as CRC checksum failure. It is assumed that the DCI may not be used.

Meanwhile, the operation disclosed in Example 8 may be considered and performed together with other UE operations in a PDCCH validity check process used to distinguish activation/deactivation DCI from DCI for other retransmissions. In this case, a configuration used to indicate a dynamic uplink grant or dynamic downlink assignment (eg, PDSCH-config, PUSCH-config in RRC) may also be included in the plurality of quasi-static resource configurations.

15 is a flowchart of a method for transmitting an uplink signal by a user equipment according to an example of the present disclosure.

Referring to FIG. 15, in S1401, the user equipment may receive a PDCCH for a plurality of SPS PDSCHs from a base station. In this case, the PDCCH may activate the plurality of SPS PDSCHs. In addition, the plurality of SPS PDSCHs are associated with a plurality of SPS settings, and each of the plurality of SPS settings may include information on a period in which the SPS PDSCH is received.

In S1403, the user equipment may receive the plurality of SPS PDSCHs from the base station based on the PDCCH.

In S1405, the user equipment may transmit a HARQ-ACK response for the plurality of SPS PDSCHs to the base station through uplink resources. In this case, the uplink resource may be indicated by the PDCCH based on the HARQ-ACK response being associated with the first SPS PDSCH received in the time domain among the plurality of SPS PDSCHs.

Alternatively, the uplink resource may be indicated by the PDCCH based on the HARQ-ACK response associated with the first SPS PDSCH received in the periods.

Alternatively, the uplink resource may be configured through RRC signaling.

Or, based on that the HARQ-ACK response is associated with the SPS PDSCH received first in the periods, the uplink resource is a predetermined downlink among the downlink resources associated with the SPS PDSCH received first in the periods It may be determined based on resources and the PDCCH. In this case, the predetermined downlink resource may be located first in the time domain among the downlink resources associated with the SPS PDSCH received first in the periods.

16 is a flowchart of a method for receiving an uplink signal by a base station according to an example of the present disclosure. Hereinafter, a detailed description of the overlapping portion with FIG. 15 will be omitted.

Referring to FIG. 16, in S1501, a base station may transmit a PDCCH for a plurality of SPS PDSCHs to a user equipment. In this case, the PDCCH may activate the plurality of SPS PDSCHs.

In S1503, the base station may transmit the plurality of SPS PDSCHs to the UE based on the PDCCH.

In S1505, the base station may receive a HARQ-ACK response for the plurality of SPS PDSCHs from the UE through uplink resources.

Examples of the present disclosure disclosed as described above have been provided to enable any person skilled in the art related to the present disclosure to implement and implement the present disclosure. Although the above has been described with reference to examples of the present disclosure, those skilled in the art may variously modify and change the examples of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Implementations of the present disclosure may be used in a wireless communication system, a base station or user equipment, and other equipment.

Claims (11)

1. In a method for a user device to transmit an uplink signal in a wireless communication system,

   Receiving a PDCCH (physical downlink control channel) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs);

   Receiving the plurality of SPS PDSCHs based on the PDCCH; And

   Transmitting HARQ-ACK responses for the plurality of SPS PDSCHs through uplink resources,

   The PDCCH activates the plurality of SPS PDSCHs,

   Uplink signal transmission method.
2. The method of claim 1,

   Based on the HARQ-ACK response is associated with the first SPS PDSCH received in the time domain among the plurality of SPS PDSCH, the uplink resource is indicated by the PDCCH,

   Uplink signal transmission method.
3. The method of claim 1,

   The plurality of SPS PDSCHs are associated with a plurality of SPS settings, wherein each of the plurality of SPS settings includes information on a period in which the SPS PDSCH is received,

   Based on that the HARQ-ACK response is associated with the SPS PDSCH received first in the periods, the uplink resource is indicated by the PDCCH,

   Uplink signal transmission method.
4. The method of claim 1,

   The uplink resource is set through radio resource control (RRC) signaling,

   Uplink signal transmission method.
5. The method of claim 1,

   The plurality of SPS PDSCHs are associated with a plurality of SPS settings, wherein each of the plurality of SPS settings includes information on a period in which the SPS PDSCH is received,

   Based on the HARQ-ACK response being associated with the SPS PDSCH received first in the periods, the uplink resource is a downlink resource determined in advance among the downlink resources associated with the SPS PDSCH received first in the periods, and Determined based on the PDCCH,

   Uplink signal transmission method.
6. The method of claim 5,

   The predetermined downlink resource is located first in the time domain among the downlink resources associated with the SPS PDSCH received first in the periods,

   Uplink signal transmission method.
7. In the device for user equipment in a wireless communication system,

   At least one processor; And

   And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, the operations:

   Receiving a PDCCH (physical downlink control channel) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs);

   Receiving the plurality of SPS PDSCHs based on the PDCCH; And

   Transmitting HARQ-ACK responses for the plurality of SPS PDSCHs through uplink resources,

   The PDCCH activates the plurality of SPS PDSCHs,

   Device.
8. In a user device for transmitting an uplink signal in a wireless communication system,

   At least one transceiver;

   At least one processor; And

   And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include:

   Receiving a PDCCH (physical downlink control channel) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs);

   Receiving the plurality of SPS PDSCHs based on the PDCCH; And

   Transmitting HARQ-ACK responses for the plurality of SPS PDSCHs through uplink resources,

   The PDCCH activates the plurality of SPS PDSCHs,

   User device.
9. A computer-readable storage medium comprising:

   The computer-readable storage medium stores at least one computer program including at least one or more instructions that when executed by at least one or more processors cause the at least one or more processors to perform operations for a user device, and , The actions are:

   Receiving a PDCCH (physical downlink control channel) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs);

   Receiving the plurality of SPS PDSCHs based on the PDCCH; And

   Transmitting HARQ-ACK responses for the plurality of SPS PDSCHs through uplink resources,

   The PDCCH activates the plurality of SPS PDSCHs,

   Computer readable storage media.
10. In a method for a base station to receive an uplink signal in a wireless communication system,

    Transmitting a physical downlink control channel (PDCCH) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs);

    Transmitting the plurality of SPS PDSCHs based on the PDCCH; And

    Receiving a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource,

    The PDCCH activates the plurality of SPS PDSCHs,

    Uplink signal reception method.
11. In the base station for receiving an uplink signal in a wireless communication system,

    At least one processor; And

    And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include:

    Transmitting a physical downlink control channel (PDCCH) for a plurality of semi-persistent scheduling (SPS) physical downlink shared channels (PDSCHs);

    Transmitting the plurality of SPS PDSCHs based on the PDCCH; And

    Receiving a HARQ-ACK response for the plurality of SPS PDSCHs through an uplink resource,

    The PDCCH activates the plurality of SPS PDSCHs,

    Base station.

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