Method and apparatus for determining transmission time point of type 1 configured grant in wireless communication system

Abstract

The disclosure relates to a communication technology for converging IoT technology with a 5G communication system to support higher data transmission rates beyond 4G systems and a system thereof. The disclosure can be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related services, etc.) based on 5G communication technology and IoT-related technology. The disclosure provides a method and apparatus for determining a transmission time point of a type 1 configured grant in a wireless communication system.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a method and apparatus for determining a transmission time point of a type 1 configured grant in a wireless communication system. BACKGROUND

[0002] To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a '5G Network'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed for use in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, a technology for coordination between cells, a cooperative multi-cell transmission technique, an interference mitigation and cancellation technology, a network-based video delivery method, moving network technology, and the like. In the 5G system, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), a non-orthogonal multiple access (NOMA), and a sparse code multiple access (SCMA) as an advanced access technology have been developed.

[0003] The Internet, which is a human centered network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the IoT technology and the Big Data processing technology through connection with a cloud server, has emerged as a new paradigm for the IoT. As technology elements, such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology", and "security technology" have been demanded for IoT implementation, a sensor network, a Machine-to-Machine (M2M) communication, Machine Type Communication (MTC), and the like have been researched. Such an IoT environment can provide intelligent Internet technology services that create a new value through collection and analysis of data generated from connected things. The IoT can be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances, and advanced medical services through the combination of existing information technology (IT) and various industrial applications.

[0004] In view of this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, machine type communication (MTC), and machine-to-machine (M2M) communication can be implemented by beamforming, MIMO, and array antennas. Application of a cloud radio access network (RAN) as the above-described big data processing technology can also be considered an example of convergence of the 5G technology with the IoT technology.

[0005] The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above information could be applicable as prior art with regard to the present disclosure. SUMMARY

[0006] TECHNICAL PROBLEM

[0007] In a case where a terminal performs uplink transmission of transmitting data to a base station, allocation of an uplink radio resource for transmitting data can be performed using a configured grant or the like. The configured grant includes a type 1 configured grant and a type 2 configured grant, and the type 1 configured grant can be configured through a radio resource control (RRC) configuration / reconfiguration message.

[0008] The terminal determines a transmission time point of the type 1 configured grant through the RRC message. If a delay occurs in transmitting the RRC message, it is not possible to know an accurate time point at which the base station transmits the RRC message, and thus a method for determining the transmission time point of the type 1 configured grant needs to be defined.

[0009] SOLUTION TO PROBLEM

[0010] One aspect of the present disclosure is to provide a method and apparatus for determining a transmission time point of a type 1 configured grant.

[0011] To solve the above-described problem, a method performed by a terminal in a wireless communication network system according to an embodiment is provided, the method including receiving, from a base station, configuration information on a configured grant, the configuration information including first information on an offset; identifying a resource for initializing the configured grant based on the configuration information; and starting uplink transmission of the configured grant in the identified resource, wherein the resource is identified based on the offset and a system frame number for determining the offset in a time domain, and wherein, in a case where the configuration information further includes second information on a time reference system frame number, the system frame number is determined based on a sequence number indicated by the second information.

[0012] Further, a method performed by a terminal in a wireless communication system according to an embodiment can include receiving, from a base station, configuration information about a configured grant, the configuration information including first information about an offset; and starting uplink transmission of the configured grant in a resource, wherein the resource is identified based on the offset and a system frame number used to determine the offset in a time domain, and wherein, in case that the configuration information further includes second information about a time reference system frame number, the system frame number is determined based on a sequence number indicated by the second information.

[0013] Further, a terminal in a wireless communication system according to an embodiment can include a transceiver; and a controller configured to: control the transceiver to receive, from a base station, configuration information about a configured grant, the configuration information including first information about an offset; identify a resource for initializing the configured grant based on the configuration information; and start uplink transmission of the configured grant in the identified resource, wherein the resource is identified based on the offset and a system frame number used to determine the offset in a time domain, and wherein, in case that the configuration information further includes second information about a time reference system frame number, the system frame number is determined based on a sequence number indicated by the second information.

[0014] Further, a base station in a wireless communication system according to an embodiment can include a transceiver; and a controller configured to: control the transceiver to transmit, to a terminal, configuration information about a configured grant, the configuration information including first information about an offset; and control the transceiver to receive uplink grant of the configured grant starting in a resource, wherein the resource is identified based on the offset and a system frame number used to determine the offset in a time domain, and wherein, in case that the configuration information further includes second information about a time reference system frame number, the system frame number is determined based on a sequence number indicated by the second information.

[0015] Advantages of the Invention

[0016] Embodiments provide an explicit reference for a system frame number (SFN=0). By referring to the system frame number, even in case that a period of the type 1 configured grant is configured as a value other than a divisor of a period of a frame in which SFN is 0 (SFN=0), the offset value is applied.

[0017] Before undertaking a detailed description of the foregoing, it can be advantageous to set forth definitions of certain terms and phrases used in this patent document. The terms "include" and "comprise," as well as derivatives thereof, mean inclusion without limitation. The term "or" is inclusive, meaning and / or. The phrases "associated with" and "associated therewith," as well as derivatives thereof, can mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, be proximate to, be bound to or with, have a property of, have, have a property of, or the like. The term "controller" means any device, system or part thereof that controls at least one operation, such a device can be implemented in hardware, firmware or software, or some combination of at least two of the same. It should be noted that the functionality associated with any particular controller can be centralized or distributed, whether locally or remotely.

[0018] Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium. The terms "application" and "program" refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof. The phrase "computer readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer readable medium" includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. A "non-transitory" computer readable medium excludes wired, wireless, optical, or other communication links. Non-transitory computer readable media include media that can be permanently stored and media that can be stored and re-writable, such as a rewritable optical disc or an erasable memory device.

[0019] Definitions for certain words and phrases are provided throughout this patent document, and include the definitions below. To the extent a term or phrase is not expressly defined, it should be given its broadest context and construed consistent with the use of that term or phrase within the present disclosure and this document. BRIEF DESCRIPTION OF DRAWINGS

[0020] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals represent like parts:

[0021] Figure 1 An example of a scenario in which a Type 1 configured grant is configured is illustrated.

[0022] Figure 2 Fig. 1 illustrates a scenario of configuring a Type 1 configured grant.

[0023] Figure 3 Fig. 2 illustrates a scenario of different analysis on Type 1 configured grant.

[0024] Figure 4 Fig. 3 illustrates a scenario of different analysis on Type 1 configured grant due to retransmission.

[0025] Figure 5 Fig. 4 illustrates a reference SFN application method proposed in the present disclosure.

[0026] Figure 6 Fig. 5 illustrates a reference SFN application method proposed in the present disclosure.

[0027] Figure 7 Fig. 6 illustrates a reference time application method proposed in the present disclosure.

[0028] Figure 8 Fig. 7 illustrates a reference SFN application method proposed in the present disclosure.

[0029] Figure 9 Fig. 8 illustrates a reference time application method proposed in the present disclosure.

[0030] Figure 10 Fig. 9 illustrates a reference SFN application method proposed in the present disclosure.

[0031] Figure 11 Fig. 10 illustrates a method of re-determining the transmission time point of configured grant at each frame (SFN=0).

[0032] Figure 12 Fig. 11 illustrates a method of configuring Type 1 configured grant.

[0033] Figure 13 Fig. 12 illustrates a structure of a base station according to an embodiment.

[0034] Figure 14 Fig. 13 illustrates a structure of a terminal according to an embodiment. DETAILED DESCRIPTION

[0035] The embodiments discussed below Figures 1 to 14 The principles of the present disclosure described in this patent document can be implemented in any of the following arrangements, and should not be construed as limiting the scope of the present disclosure in any way. It should be understood by those skilled in the art that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0036] Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the following description of the present disclosure, detailed description of well-known functions or configurations incorporated herein can be omitted when it can make the subject matter of the present disclosure unnecessarily unclear. The terms described below are terms defined in consideration of functions in the present disclosure, and can vary according to users, user's intentions, or customs. Therefore, the definition of the terms should be based on the contents of the entire specification.

[0037] The advantages and features of the present disclosure and its implementation will become apparent from the embodiments described below with reference to the accompanying drawings. However, the present disclosure is not limited to the embodiments set forth below, but can be implemented in various different forms. The following embodiments are provided only to completely disclose the present disclosure and to inform those skilled in the art of the scope of the present disclosure, and the present disclosure is only limited by the scope of the claims. Throughout the specification, like or similar reference numerals refer to like or similar elements.

[0038] In describing the present disclosure, detailed description of well-known related functions or configurations incorporated herein can be omitted when it can unnecessarily obscure the subject matter of the present disclosure. Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0039] Figure 1 FIG. 1 illustrates a scenario of a type 1 configured grant.

[0040] In a case where a terminal performs uplink transmission of data to a base station, two methods such as dynamic grant (DG) and configured grant (CG) are used to perform allocation of uplink radio resources through which data is transmitted. DG refers to a method of allocating radio resources using DCI format of a physical downlink control channel (PDCCH). Here, the PDCCH resource is scrambled by a radio network temporary identity (RNTI) and transmitted, and the RNTI can be divided into a connected RNTI (C-RNTI), a configured scheduling RNTI (CS-RNTI), etc. according to its use. The resource allocated by the C-RNTI can be used for initial transmission and retransmission of normal dynamic grant. The resource allocated by the CS-RNTI can be a retransmission resource of the configured grant, or can indicate activation or deactivation of a type 2 configured grant.

[0041] The configured grant refers to resources 101, 102, 103, 111, 112, and 113 that are repeated at a predetermined period 100 on a time axis. Once the configured grant is configured and activated, the configured radio resource is repeatedly configured until a separate deactivation or release point of time is reached. The configured grant can include a type 1 configured grant and a type 2 configured grant.

[0042] A type 1 configured grant refers to a configured grant in which all resource configurations and a period of the configured grant are configured through an RRC configuration message. The type 1 configured grant does not include a separate activation and deactivation procedure, and is assumed to be activated when configuration is performed through an RRC configuration / reconfiguration message transmitted by a base station to a terminal, and is deactivated when the configuration is released.

[0043] A type 2 configured grant refers to a configured grant in which only some information, such as a period and a CG index, is pre-configured through an RRC configuration message, and is activated and deactivated through downlink control information (DCI) allocated by a CF-RNTI.

[0044] A time point (moment) at which a type 1 configured grant is transmitted is determined by a configured period 100 and an offset value 120. The offset refers to a value indicating a distance from a start time point 130 and 135 of a frame in which a system frame number (SFN) is 0 (SFN=0). Specifically, the offset value can be determined by a sum 120 of a time domain offset (timeDomainOffset) value configured through an RRC configuration / reconfiguration message and an S value, which is a symbol length of a transmission time point configured through a physical layer standard. In Figure 1 In the illustrated embodiment, it is assumed that a unit of the time domain offset value is a slot and a unit of the S value is a symbol, and thus the offset value is obtained by multiplying the time domain offset by a number of symbols per slot (numberOfSymbolPerSlot) and adding the S.

[0045] Here, if a period of the type 1 configured grant is configured as a value that is a divisor of a time length in which a frame in which the SFN (SFN=0) is repeated, a length (offset value) from a start time point of each frame in which the SFN is 0 (SFN=0) to the first type 1 configured grant resource can have a constant value, i.e., (timeDomainOffset X numberOfSymbolsPerSlot + S). For example, in a 5G communication system, when a frame in which the SFN (SFN=0) is repeated every 10.24 seconds and a period of the type 1 configured grant is a divisor of a number of slots of 10.24 seconds, a constant offset value can be obtained.

[0046] Figure 2 FIG. 1 illustrates a scenario in which a type 1 configured grant is configured.

[0047] In a case in which a terminal performs uplink transmission of data to a base station, two methods, a dynamic grant (DG) and a configured grant (CG), are used to perform allocation of uplink radio resources through which data is transmitted.

[0048] DG refers to a method in which a wireless resource is allocated using a DCI format of a physical downlink control channel (PDCCH). Here, the PDCCH resource is scrambled by a radio network temporary identifier (RNTI) and transmitted, and the RNTI can be classified into a connection RNTI (C-RNTI), a configured scheduling RNTI (CS-RNTI), etc. according to its use. The resource allocated by the C-RNTI can be used for initial transmission and retransmission of normal dynamic grant. The resource allocated by the CS-RNTI can be a retransmission resource of configured grant, or can indicate activation or deactivation of type 2 configured grant.

[0049] Configured grant refers to resources 201, 202, 203, 211, 212, 213, and 214 that are repeated at a predetermined period 100 on a time axis. Once the configured grant is configured and activated, the configured wireless resource is repeated until a separate deactivation or release point of time is reached.

[0050] The configured grant can include a type 1 configured grant and a type 2 configured grant. The type 1 configured grant refers to a configured grant in which all resource configurations and a period of the configured grant are configured by an RRC configuration message.

[0051] The type 1 configured grant does not include a separate activation and deactivation procedure, assuming that the type 1 configured grant is activated when configuration is performed by an RRC configuration / reconfiguration message transmitted by a base station to a terminal, and the type 1 configured grant is deactivated when the configuration is released.

[0052] The type 2 configured grant refers to a configured grant in which only some information, such as a period and a CG index, is pre-configured by an RRC configuration message, and is activated and deactivated by DCI allocated by a CF-RNTI.

[0053] A point in time (time) at which the type 1 configured grant is transmitted is determined by a configured period 200 and 240 and an offset value 220. The offset refers to a value indicating a distance from a starting point of time 230 of a frame in which a specific system frame number (SFN) is 0. Specifically, the offset value can be determined by a value 220 obtained by summing a time domain offset (timeDomainOffset) value configured by an RRC configuration / reconfiguration message and an S value, which is a symbol length of a transmission point in time configured by a physical layer standard. In Figure 2 In the illustrated embodiment, assuming that a unit of the time domain offset value is a slot and a unit of the S value is a symbol, the offset value is obtained by multiplying the time domain offset by a number of symbols per slot (numberOfSymbolPerSlot) and adding the S.

[0054] Here, if the periodicity of the Type 1 configured grant is configured as a value other than a divisor value of the length of time in which the SFN (SFN=0) is repeated, the length from the next SFN start time point (SFN=0) 235 to the length of the first Type 1 configured grant resource (offset value) can have a length 250 different from the value 220, i.e., (timeDomainOffset X numberOfSymbolsPerSlot + S). Because the periodicity 240 of the Type 1 configured grant is continuously applied regardless of the SFN start time point (SFN=0), this problem can occur.

[0055] For example, in the 5G communication system, in the case where a frame in which the SFN is 0 (SFN=0) is repeated every 10.24 seconds and the periodicity of the Type 1 configured grant is 1 second, because 1 second is not a divisor of 10.24 seconds, the offset is always changed. As shown in FIG. 10, Figure 2 As shown, the base station can configure whether to change the offset of the time point in which the SFN is 0 (SFN=0) so that the periodicity 200 and 240 of the Type 1 configured grant is constant. For example, only when a continue indicator is configured, the constant periodicity can be applied; if not, the offset can be equally applied to each SFN start time point (SFN=0).

[0056] Figure 3 FIG. 11 illustrates a scenario of different analysis on the Type 1 configured grant.

[0057] In Figure 3 In the embodiment shown in FIG. 12, it is assumed that the configuration of the Type 1 configured grant is received after the second SFN start time point (SFN=0) 335 (as indicated by reference numeral 360). However, this time point is a reference time point in which the terminal configures the Type 1 configured grant, not a time point in which the base station transmits a corresponding configuration message.

[0058] More specifically, Type 1 configured grant can be configured by RRC configuration / reconfiguration message, and this RRC message can cause several hundreds of milliseconds (ms) or more of delay due to retransmission of hybrid automatic repeat request (HARQ) or automatic repeat request (ARQ). Due to the delay, the RRC configuration / reconfiguration message that has been transmitted before the second SFN start point (SFN=0) 335 can be transmitted after the second SFN start point (SFN=0) (as shown by reference numeral 360). Since the receiving RRC layer of the terminal can not accurately know the time point at which the base station transmits the corresponding message, the receiving RRC layer can not know whether the corresponding configuration message is transmitted before or after the second SFN start point (SFN=0). In addition, when the period of Type 1 configured grant is not a divisor of 10.24 seconds, the actual transmission time point of Type 1 configured grant can vary depending on the SFN start point (SFN=0) to which the offsets 320 and 350 (as shown by reference numerals 312, 313, 314, 321, or 322) are applied.

[0059] For example, if the terminal determines that the base station transmitted the RRC configuration / reconfiguration message before the second SFN start point (SFN=0) and thus determines that the base station transmitted the RRC configuration / reconfiguration message after the first SFN start point (SFN=0) 330, the transmission time point of Type 1 configured grant as shown by reference numerals 312, 313, and 314 can be applied. Otherwise, as one example, if it is determined that the RRC configuration / reconfiguration message is transmitted after the second SFN start point (SFN=0) 335, the transmission time point of Type 1 configured grant as shown by reference numerals 321, 322, and 323 can be applied. In another embodiment, an offset can be applied to the SFN start point (SFN=0) 370 that arrives after the time point 360 at which the configuration of Type 1 configured grant is received and applied.

[0060] Figure 4 FIG. 4 illustrates a scenario in which Type 1 configured grant is analyzed differently due to retransmission.

[0061] In Figure 4 In the embodiment shown, it is assumed that the configuration of Type 1 configured grant is received after the second SFN start point (SFN=0) 435 (as shown by reference numeral 460). However, this time point is the reference time point of the terminal configuring Type 1 configured grant, not the time point 450 at which the base station transmits the corresponding configuration message.

[0062] Type 1 configured grant can be configured through RRC configuration / reconfiguration message, and the RRC message can cause several hundreds of milliseconds (ms) or longer delay due to retransmission of hybrid automatic repeat request (HARQ) or automatic repeat request (ARQ). Due to the delay, the RRC configuration / reconfiguration message (as shown by reference numeral 450) that has been transmitted before the second SFN start time point (SFN=0) 435 can be transmitted after the second SFN time point (SFN=0) (as shown by reference numeral 460) due to the delay.

[0063] Since the receiving RRC layer of the terminal can not accurately know the time point at which the base station transmits the corresponding message, the receiving RRC layer can not know whether the corresponding configuration message is transmitted before or after the second SFN start time point (SFN=0). In addition, when the period of the type 1 configured grant is not a divisor of 10.24 seconds, the actual transmission time point of the type 1 configured grant can change depending on the SFN start time point (SFN=0) to which the offset 420 is applied with reference to the time point.

[0064] For example, if the terminal determines that the base station transmitted the RRC configuration / reconfiguration message before the second SFN start time point (SFN=0) and thus determines that the base station transmitted the RRC configuration / reconfiguration message after the first SFN start time point (SFN=0) 330, the transmission time point of the type 1 configured grant as shown by reference numerals 401, 402, 403, 411, 412, and 413 can be applied. Otherwise, if it is determined that the RRC configuration / reconfiguration message is transmitted after the second SFN start time point (SFN=0) 435, the offset can be applied to the second SFN start time point (SFN=0). In another embodiment, the offset can be applied to the SFN start time point (SFN=0) 470 that arrives after the time point 460 at which the type 1 configured grant is received and configured.

[0065] Figure 5 FIG. 1 illustrates a method of applying a reference SFN proposed in the present disclosure.

[0066] As Figure 2 , 3 and 4, if the time point 560 at which the terminal applies the type 1 configured grant is adjacent to the SFN start time point (SFN=0) 535, the SFN start time point (SFN=0) applied by the terminal can be different from the time point configured by the base station. This problem can occur because the offset 520 is always applied based on the SFN start time point (SFN=0).

[0067] To avoid this problem, the terminal can be explicitly configured with a reference time point to which the offset of the type 1 configured grant is applied. Figure 5The illustrated embodiment indicates a method in which a reference SFN (SFNref) is configured (as indicated by reference numeral 550) and the offset 520 is applied from the SFN start time point 540 of the reference SFN value instead of the time point of the SFN (SFN=0). In the case where the base station configures the terminal with a type 1 configured grant through an RRC configuration / reconfiguration message, the reference SFN value can be included in the RRC configuration / reconfiguration message and transmitted together. However, in another embodiment, the reference SFN value can be included in the DCI or the medium access control control element (MAC CE) and transmitted to the terminal.

[0068] If the reference SFN is configured, the terminal can apply the offset 520 based on the SFN start time point (in another example, the SFN end time point) having the reference SFN value of the most recent past time point with respect to the time point 560 on which the type 1 configured grant is configured, i.e., the value of (timeDomainOffset X numberOfSymbolsPerSlot+S), and then can determine the transmission time points 501, 502, 503, and 504 of the type 1 configured grant in each predetermined period 500. The reference SFN value can be determined by the base station by considering the HARO and ARQ retransmission of the RRC configuration / reconfiguration message.

[0069] Here, the transmission time point of the Nth type 1 configured grant (N is a non-negative integer value) can satisfy the following equation.

[0070] <equation 1>

[0071] [(SFN X numberOfSlotsPerFrame X numberOfSymbolsPerSlot) + (slot number in the frame X numberOfSymbolsPerSlot) + symbol number in the slot] = (SFNref + timeDomainOffset X numberOfSymbolsPerSlot + S + N X periodicity) modulo (1024 X numberOfSlotsPerFrame X numberOfSymbolsPerSlot)

[0072] Here, "SFN" is a current SFN value, "numberOfSlotsPerFrame" is the number of slots per frame, "numberOfSymbolsPerSlot" is the number of symbols per slot, "slot number in the frame" is a slot sequence number in a frame, "symbol number in the slot" is a symbol sequence number in a slot, SFNref is a value indicating a reference SFN, and the value is indicated in units of slots.

[0073] In <Equation 1>, it is assumed that there are 1024 frames, each frame has a length of 10 ms, and the unit of the period is a symbol. However, even if the unit is changed or an offset value added as a constant according to an embodiment, the subject matter of the present disclosure can be applied in the same manner.

[0074] Considering <Equation 1>, the transmission time point of the 0th (N=0) configured grant can be transmission time point 501, the transmission time point of the 1st (N=1) configured grant can be transmission time point 502, and the transmission time point of the 2nd (N=2) configured grant can be transmission time point 503, and so on. By applying the above-described manner, even if the offset length of the SFN start time point (SFN=0) is changed, the terminal can continuously determine the transmission time point of the type 1 configured grant. In this case, it can actually not use the type 1 configured grant transmission time points 501 and 502 before the time point 560 on which the configuration of the type 1 configured grant is performed. In this case, it can actually first use the type 1 configured grant having a frame number of 2 (N=2) and a transmission time point of time point 503.

[0075] Here, since the terminal configures the type 1 configured grant at the time point 560, the type 1 configured grant actually used for transmission can be a type 1 configured grant resource applied after the time point 560. The transmission time point of the 0th (N=0) type 1 configured grant can be defined based on a resource actually available, and then the transmission time point of the Nth type 1 configured grant can satisfy the following equation.

[0076] <Equation 2-1>

[0077] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (SFNref + timeDomainOffset x numberOfSymbolsPerSlot + S + (N + m) x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0078] Here, m is an integer value that satisfies the time point (SFN, slot number in the frame, symbol number in the slot) of the first configured grant resource after the time point at which the configuration of the type 1 configured grant is executed. In other words, m is the smallest non-zero integer that satisfies the following equation.

[0079] < Equation 2-2>

[0080] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (SFNref + timeDomainOffset x numberOfSymbolsPerSlot + S + (N + m) x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0081] In the embodiment shown in FIG. 10, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point at which the configuration of the type 1 configured grant is executed satisfy the condition "m = 2". Figure 5

[0082] As shown in FIG. 11, in the embodiment shown in FIG. 10, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point at which the configuration of the type 1 configured grant is executed satisfy the condition "m = 2". Figure 5 ​As shown, the base station can configure whether to change the offset of the time point of SFN=0 to make the period 500 of the Type 1 configured grant constant. For example, the constant period can be applied only when the Continue Indicator is configured; if not, the offset can be equally applied to each SFN start time point (SFN=0).

[0083] Figure 6 FIG. 1 illustrates a reference SFN application method proposed in the disclosure.

[0084] As Figure 2 , 3 If the time point 660 at which the terminal applies the Type 1 configured grant is adjacent to the SFN start time point (SFN=0) 635, the SFN start time point (SFN=0) applied by the terminal can be different from the time point configured by the base station, as shown in FIGS. 1, 2, 3, and 4. This problem can occur because the offset 620 is always applied based on the SFN start time point (SFN=0).

[0085] To avoid this problem, the terminal can be explicitly configured with a reference time point on which the offset of the Type 1 configured grant is applied. Figure 6 The embodiment shown indicates a method in which a reference SFN value (SFNref) is configured (as shown by reference numeral 650) and the offset 620 is applied from the SFN start time point 640 of the reference SFN value, not from the time point of SFN (SFN=0). In the case where the base station configures the Type 1 configured grant for the terminal through an RRC configuration / reconfiguration message, the reference SFN value can be included in the RRC configuration / reconfiguration message and transmitted together. However, in another embodiment, the reference SFN value can be included in the DCI or the medium access control control element (MAC CE) and transmitted to the terminal.

[0086] If the reference SFN is configured, the terminal can apply the offset 520 based on the SFN start time point (in another example, the SFN end time point) of the reference SFN value having the nearest past time point or future time point with respect to the time point 660 on which the Type 1 configured grant is configured, i.e., the value of (timeDomainOffset X numberOfSymbolsPerSlot+S), and then can determine the transmission time points 601, 602, 603, and 604 of the Type 1 configured grant under each predetermined period 600. In this case, by comparing the distances 670 and 675 from the time point at which the Type 1 configured grant is configured to the start time point or the end time point of the reference SFN, the start or end time point of the reference SFN closer to the time point at which the Type 1 configured grant is configured can be determined. In Figure 6In the illustrated embodiment, it is assumed that the past time point 640 is determined to be closer to the time point of the Type 1 configured grant. The reference SFN value can be determined by the base station by considering HARQ and ARQ retransmission of the RRC configuration / reconfiguration message.

[0087] Here, the transmission time point of the Nth Type 1 configured grant (N is a non-negative integer value) can satisfy the following equation.

[0088] < Equation 3 >

[0089] [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (SFNref + timeDomainOffset × numberOfSymbolsPerSlot + S + N × periodicity) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot)

[0090] Here, "SFN" is the current SFN value, "numberOfSlotsPerFrame" is the number of slots per frame, "numberOfSymbolsPerSlot" is the number of symbols per slot, "slot number in the frame" is the slot sequence number in the frame, "symbol number in the slot" is the symbol sequence number in the slot, SFNref is a value indicating a reference SFN, and the value is indicated in units of slots. That is, SFNref can be indicated as a value obtained by multiplying the reference SFN value by the number of slots per frame. More specifically, SFNref can be indicated as a value obtained by multiplying the reference SFN value by the number of slots per frame and the number of symbols per slot.

[0091] In < Equation 3 >, it is assumed that there are 1024 frames, each having a length of 10 ms, and the unit of the periodicity is a symbol. However, even if the unit is changed or an offset value added as a constant according to an embodiment, the subject matter of the present disclosure can be applied in the same manner.

[0092] Considering <Equation 3>, the transmission time point of the 0th (N=0) configured grant can be transmission time point 601, the transmission time point of the 1st (N=1) configured grant can be transmission time point 602, and the transmission time point of the 2nd (N=2) configured grant can be transmission time point 603, and so on. By applying the above-described manner, even if the offset length of the SFN start time point (SFN=0) is changed, the terminal can continuously determine the transmission time point of the Type 1 configured grant. In this case, it can actually not use the Type 1 configured grant transmission time points 601 and 602 before the time point 660 at which the configuration of the Type 1 configured grant is performed. In this case, it can actually first use the Type 1 configured grant having a frame number of 2 (N=2) and a transmission time point of time point 603.

[0093] Here, since the terminal recognizes the time point 660 at which the configuration of the Type 1 configured grant is performed, the Type 1 configured grant actually used for transmission can be the Type 1 configured grant resource applied after the time point 660. The transmission time point of the 0th (N=0) Type 1 configured grant can be defined based on the actually available resource, and then the transmission time point of the Nth Type 1 configured grant can satisfy the following equation.

[0094] <Equation 4-1>

[0095] [(SFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)+(slot number in the frame×numberOfSymbolsPerSlot)+symbol number in the slot] = (SFNref+timeDomainOffset×numberOfSymbolsPerSlot+S+(N+m)×periodicity) modulo (1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)

[0096] Here, m is an integer value satisfying the time point (SFN, slot number in the frame, symbol number in the slot) of the first configured grant resource after the time point at which the configuration of the Type 1 configured grant is performed. In other words, m is the smallest non-zero integer satisfying the following equation.

[0097] <Equation 4-2>

[0098] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot + slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (SFNref + timeDomainOffset x numberOfSymbolsPerSlot + S + m x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0099] In Figure 6 In the embodiment shown, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point of performing the configuration of the type 1 configured grant satisfy the condition "m = 2".

[0100] As Figure 6 shown, the base station can configure whether to change the offset of the time point of SFN = 0 so that the period 600 of the type 1 configured grant is constant. For example, the constant period can be applied only when a continue indicator is configured; if not, the offset can be equally applied to each SFN start time point (SFN = 0).

[0101] Figure 7 FIG. illustrates a reference time application method proposed in the disclosure.

[0102] As Figure 2 , 3 and 4, if the time point 760 at which the terminal applies the type 1 configured grant is adjacent to the SFN start time point (SFN = 0) 735, the SFN start time point (SFN = 0) applied by the terminal can be different from the time point configured by the base station. Because the offset 720 is always applied based on the SFN start time point (SFN = 0), this problem can occur.

[0103] To avoid this problem, the terminal can explicitly configure the time point 740 indicated by the time domain offset as the reference time point to which the offset of the type 1 configured grant is applied. Figure 7The illustrated embodiment relates to a method of applying a symbol offset S at a time 750 indicated by a time domain offset, not a time point of SFN=0. To this end, it is necessary to extend the configurable range of the timeDomainOffset value according to a period in which SFN (SFN=0) is repeated. Here, the terminal can apply an offset 720, i.e., an S value, based on a time point 740 indicated by a time domain offset with respect to a past time point closest to a time point 760 of a configured type 1 configured grant, and then can determine transmission time points 701, 702, 703, and 704 of the type 1 configured grant at each predetermined period 700. The time domain offset value can be determined by the base station by considering HARQ and ARQ retransmission of an RRC configuration / reconfiguration message.

[0104] Here, a transmission time point of an Nth type 1 configured grant (N is a non-negative integer value) can satisfy the following equation.

[0105] <equation 5>

[0106] [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (timeDomainOffset × numberOfSymbolsPerSlot + S + N × periodicity) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot)

[0107] Here, "SFN" is a current SFN value, "numberOfSlotsPerFrame" is the number of slots per frame, "numberOfSymbolsPerSlot" is the number of symbols per slot, "slot number in the frame" is a slot sequence number in a frame, and "symbol number in the slot" is a symbol sequence number in a slot. In <equation 5>, it is assumed that there are 1024 frames, each having a length of 10 ms, and the unit of the period is a symbol. However, even if the unit is changed or an offset value added as a constant according to the embodiment, the subject matter of the present disclosure can be applied in the same manner.

[0108] Considering <Equation 5>, the transmission time point of the 0th (N=0) configured grant can be transmission time point 701, the transmission time point of the 1st (N=1) configured grant can be transmission time point 702, and the transmission time point of the 2nd (N=2) configured grant can be transmission time point 703, and so on. By applying the above-described manner, even if the offset length of the SFN start time point (SFN=0) is changed, the terminal can continuously determine the transmission time point of the Type 1 configured grant. In this case, it can actually not use the Type 1 configured grant transmission time points 701 and 702 before the time point 760 at which the configuration of the Type 1 configured grant is performed. In this case, it can actually first use the Type 1 configured grant having a frame number of 2 (N=2) and a transmission time point of time point 703.

[0109] Here, since the terminal recognizes the time point 760 at which the configuration of the Type 1 configured grant is performed, the Type 1 configured grant actually used for transmission can be the Type 1 configured grant resource applied after the time point 760. The transmission time point of the 0th (N=0) Type 1 configured grant can be defined based on the actually available resource, and then the transmission time point of the Nth Type 1 configured grant can satisfy the following equation.

[0110] <Equation 6-1>

[0111] [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (SFNref + timeDomainOffset × numberOfSymbolsPerSlot + S + (N + m) × periodicity) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot)

[0112] Here, m is an integer value satisfying the time point (SFN, slot number in the frame, symbol number in the slot) of the first configured grant resource after the time point at which the configuration of the Type 1 configured grant is performed. In other words, m is the smallest non-zero integer satisfying the following equation.

[0113] <Equation 6-2>

[0114] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot + slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (timeDomainOffset x numberOfSymbolsPerSlot + S + m x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0115] In Figure 7 In the embodiment shown, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point of performing the configuration of the type 1 configured grant satisfy the condition "m = 2".

[0116] As Figure 7 shown, the base station can configure whether to change the offset of the time point of SFN = 0 so that the periodicity 700 of the type 1 configured grant is constant. For example, the constant periodicity can be applied only when a continue indicator is configured; if not, the offset can be equally applied to each SFN start time point (SFN = 0).

[0117] Figure 8 FIG. illustrates a reference SFN application method proposed in the present disclosure.

[0118] As Figure 2 , 3 and 4, if the time point 860 at which the terminal applies the type 1 configured grant is adjacent to the SFN start time point (SFN = 0) 835, the SFN start time point (SFN = 0) applied by the terminal can be different from the time point configured by the base station. Because the offset 820 is always applied based on the SFN start time point (SFN = 0), this problem can occur.

[0119] To avoid this problem, the terminal can explicitly configure the time point 840 indicated by the time domain offset as a reference time point of the offset at which the type 1 configured grant is applied. Figure 8The illustrated embodiment relates to a method of applying a symbol offset S at a time 850 indicated by the time domain offset instead of a time point of SFN=0. To this end, it is necessary to extend the configurable range of the timeDomainOffset value according to the period of repeating SFN (SFN=0). Here, the terminal can apply the offset 820, i.e., the S value, based on the time point indicated by the time domain offset of the past or future time point closest to the time point of the configured Type 1 configured grant 860, and then can determine the transmission time points 801, 802, 803, and 804 of the Type 1 configured grant at each predetermined period 800.

[0120] In this case, by comparing the distances 870 and 875 from the time point of the configured Type 1 configured grant to the time point indicated by the time domain offset, it is possible to determine the time point indicated by the time domain offset of the time point closer to the time point of the configured Type 1 configured grant. In this case, the distance 870 from the time point of the configured Type 1 configured grant to the time point indicated by the time domain offset of the past time point 840 is shorter than the distance 875 from the time point of the configured Type 1 configured grant to the time point indicated by the time domain offset of the future time point 850. Figure 8 In the illustrated embodiment, it is assumed that the past time point 840 is determined to be closer to the time point of the configured Type 1 configured grant. The time domain offset value can be determined by the base station by considering HARQ and ARQ retransmission of the RRC configuration / reconfiguration message.

[0121] Here, the transmission time point of the Nth Type 1 configured grant (N is a non-negative integer value) can satisfy the following equation.

[0122] <equation 7>

[0123] [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (timeDomainOffset × numberOfSymbolsPerSlot + S + N × periodicity) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot)

[0124] Here, "SFN" is a current SFN value, "numberOfSlotsPerFrame" is the number of slots per frame, "numberOfSymbolsPerSlot" is the number of symbols per slot, "slot number in the frame" is a slot sequence number in a frame, and "symbol number in the slot" is a symbol sequence number in a slot. In Equation 7, it is assumed that there are 1024 frames, each frame has a length of 10 ms, and the unit of the period is a symbol. However, even if the unit is changed or an offset value added as a constant according to an embodiment, the subject matter of the present disclosure can be applied in the same manner.

[0125] Considering Equation 7, the transmission time point of the 0th (N=0) configured grant can be transmission time point 801, the transmission time point of the 1st (N=1) configured grant can be transmission time point 802, and the transmission time point of the 2nd (N=2) configured grant can be transmission time point 803, and so on. By applying the above-described manner, even if the offset length of the SFN start time point (SFN=0) is changed, the terminal can continuously determine the transmission time point of the Type 1 configured grant. In this case, it can actually not use the Type 1 configured grant transmission time points 801 and 802 before the time point 860 on which the configuration of the Type 1 configured grant is performed. In this case, it can actually first use the Type 1 configured grant having a frame number of 2 (N=2) and a transmission time point of time point 803.

[0126] Here, since the terminal recognizes the time point 860 on which the configuration of the Type 1 configured grant is performed, the Type 1 configured grant actually used for transmission can be the Type 1 configured grant resource applied after the time point 860. The transmission time point of the 0th (N=0) Type 1 configured grant can be defined based on the actually available resource, and then the transmission time point of the Nth Type 1 configured grant can satisfy the following equation.

[0127] Equation 8-1

[0128] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (SFNref + timeDomainOffset x numberOfSymbolsPerSlot + S + (N + m) x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0129] Here, m is an integer value that satisfies the time point (SFN, slot number in the frame, symbol number in the slot) of the first configured grant resource after the time point at which the configuration of the type 1 configured grant is executed. In other words, m is the smallest non-zero integer that satisfies the following equation.

[0130] <equation 8-2>

[0131] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (timeDomainOffset x numberOfSymbolsPerSlot + S + m x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0132] In Figure 8 In the embodiment shown in FIG. 8, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point at which the configuration of the type 1 configured grant is executed satisfy the condition "m = 2".

[0133] As Figure 8As shown, the base station can configure whether to change the offset of the time point of SFN=0 (SFN=0) so that the period 800 of the type 1 configured grant is constant. For example, the constant period can be applied only when the Continue Indicator is configured; if not, the offset can be equally applied to each SFN start time point (SFN=0).

[0134] Figure 9 FIG. 1 illustrates a reference time application method proposed in the present disclosure.

[0135] As Figure 2 , 3 If the time point 960 at which the terminal applies the type 1 configured grant is adjacent to the SFN start time point (SFN=0) 935, the SFN start time point (SFN=0) applied by the terminal can be different from the time point configured by the base station, as shown in FIGS. 1, 2, 3, and 4. This problem can occur because the offset 920 is always applied based on the SFN start time point (SFN=0).

[0136] To avoid this problem, the terminal can explicitly configure the time point 940 indicated by the reference time offset as the reference time point to which the offset of the type 1 configured grant is applied. Figure 9 The embodiment shown relates to a method of applying a shift offset at a time 950 indicated by a reference time offset, not a time point of SFN=0 (SFN=0).

[0137] To this end, it is necessary to configure a reference time offset value and a shift offset value by the base station. Here, the terminal can apply the shift offset 920 based on the time point 940 indicated by the reference time offset with respect to the past time point closest to the time point 960 at which the configuration of the type 1 configured grant is performed on, and then can determine the transmission time points 901, 902, 903, and 904 of the type 1 configured grant in each predetermined period 900.

[0138] The reference time offset and the shift offset value can be determined by the base station by considering HARQ and ARQ retransmission of the RRC configuration / reconfiguration message. In some embodiments, the shift offset can be determined as 0.

[0139] Here, the transmission time point of the Nth type 1 configured grant (N is a non-negative integer value) can satisfy the following equation.

[0140] <equation 9>

[0141] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot) + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (referenceTimeOffset x numberOfSymbolsPerSlot + shiftOffset + N x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0142] Here, "SFN" is a current SFN value, "numberOfSlotsPerFrame" is the number of slots per frame, "numberOfSymbolsPerSlot" is the number of symbols per slot, "slot number in the frame" is a slot sequence number in a frame, and "symbol number in the slot" is a symbol sequence number in a slot. In <Equation 9>, it is assumed that there are 1024 frames, each frame has a length of 10 ms, and the unit of the period is a symbol. However, even if the unit is changed or an offset value added as a constant according to an embodiment, the subject matter of the present disclosure can be applied in the same manner.

[0143] Considering <Equation 9>, the transmission time point of the 0th (N=0) configured grant can be the transmission time point 901, the transmission time point of the 1st (N=1) configured grant can be the transmission time point 902, and the transmission time point of the 2nd (N=2) configured grant can be the transmission time point 903, and so on. By applying the above-described manner, even if the offset length of the SFN start time point (SFN=0) is changed, the terminal can continuously determine the transmission time point of the type 1 configured grant. In this case, the type 1 configured grant transmission time points 901 and 902 before the time point 960 on which the configuration of the type 1 configured grant is performed can not actually be used. In this case, the type 1 configured grant of which the frame number is 2 (N=2) and the transmission time point is the time point 903 can actually be used first.

[0144] Here, since the terminal recognizes the time point 960 on which the configuration of the type 1 configured grant is performed, the type 1 configured grant actually used for transmission can be the type 1 configured grant resource applied after the time point 960. The transmission time point of the 0th (N=0) type 1 configured grant can be defined based on the actually available resource, and then the transmission time point of the Nth type 1 configured grant can satisfy the following equation.

[0145] < Equation 10-1 >

[0146] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot) + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (referenceTimeOffset x numberOfSymbolsPerSlot + shiftOffset + (N + m) x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0147] Here, m is an integer value that satisfies the time point (SFN, slot number in the frame, symbol number in the slot) of the first configured grant resource after the time point on which the configuration of the type 1 configured grant is performed. In other words, m is the smallest non-zero integer that satisfies the following equation.

[0148] < Equation 10-2 >

[0149] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot) + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (referenceTimeOffset x numberOfSymbolsPerSlot + shiftOffset + m x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0150] In the embodiment shown in FIG. 10B, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point on which the configuration of the type 1 configured grant is performed satisfy the condition "m = 2". Figure 9

[0151] As shown in FIG. 10B, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point on which the configuration of the type 1 configured grant is performed satisfy the condition "m = 2". Figure 9 ​As shown, the base station can configure whether to change the offset of the time point of SFN=0 (SFN=0) so that the period 900 of the type 1 configured grant is constant. For example, the constant period can be applied only when a continue indicator is configured; if not, the offset can be equally applied to each SFN start time point (SFN=0).

[0152] Figure 10 FIG. illustrates a reference SFN application method proposed in the disclosure.

[0153] As Figure 2 , 3 and 4, if the time point 1060 at which the terminal applies the type 1 configured grant is adjacent to the SFN start time point (SFN=0) 1035, the SFN start time point (SFN=0) at which the terminal applies can be different from the time point configured by the base station. Because the offset 1020 is always applied based on the SFN start time point (SFN=0), this problem can occur.

[0154] To avoid this problem, the terminal can explicitly configure the time point 1040 indicated by the reference time offset as the reference time point to which the offset of the type 1 configured grant is applied. Figure 10 The embodiment illustrated relates to a method of applying a shift offset at a time 1050 indicated by a reference time offset, not a time point of SFN=0 (SFN=0).

[0155] To this end, it is necessary to configure a reference time offset value and a shift offset value through the base station. Here, the terminal can apply the shift offset 1020 based on the time point indicated by the reference time offset with respect to the nearest past or future time point from the time point 1060 at which the configuration of the type 1 configured grant is performed, and then can determine the transmission time points 1001, 1002, 1003, and 1004 of the type 1 configured grant in each predetermined period 1000. Here, by comparing the distances 1070 and 1075 from the time point at which the type 1 configured grant is configured to the time point indicated by each reference time offset, the time point indicated by the time offset of the time point closer to the time point at which the type 1 configured grant is configured can be determined. In Figure 10 In the embodiment illustrated, it is assumed that the past time point 1040 is determined to be closer to the time point at which the configuration of the type 1 configured grant is performed.

[0156] The reference time offset and the shift offset value can be determined by the base station by considering HARQ and ARQ retransmission of the RRC configuration / reconfiguration message. In some embodiments, the shift offset can be determined to be 0.

[0157] Here, the transmission time point of the Nth Type 1 configured grant (N is a non-negative integer value) can satisfy the following equation.

[0158] < Equation 11 >

[0159] [(SFN x numberOfSlotsPerFrame x numberOfSymbolsPerSlot) + (slot number in the frame x numberOfSymbolsPerSlot) + symbol number in the slot] = (referenceTimeOffset x numberOfSymbolsPerSlot + shiftOffset + N x periodicity) modulo (1024 x numberOfSlotsPerFrame x numberOfSymbolsPerSlot)

[0160] Here, "SFN" is a current SFN value, "numberOfSlotsPerFrame" is the number of slots per frame, "numberOfSymbolsPerSlot" is the number of symbols per slot, "slot number in the frame" is a slot sequence number in the frame, and "symbol number in the slot" is a symbol sequence number in the slot. In < Equation 11 >, it is assumed that there are 1024 frames, each having a length of 10 ms, and the unit of the period is a symbol. However, even if the unit is changed or an offset value added as a constant according to an embodiment, the subject matter of the present disclosure can be applied in the same manner.

[0161] Considering < Equation 11 >, the transmission time point of the 0th (N=0) configured grant can be transmission time point 1001, the transmission time point of the 1st (N=1) configured grant can be transmission time point 1002, and the transmission time point of the 2nd (N=2) configured grant can be transmission time point 1003, and so on. By applying the above-described manner, even if the offset length of the SFN start time point (SFN=0) is changed, the terminal can continuously determine the transmission time point of the Type 1 configured grant. In this case, it can actually not use the Type 1 configured grant transmission time points 1001 and 1002 before the time point 1060 on which the configuration of the Type 1 configured grant is performed. In this case, it can actually first use the Type 1 configured grant having a frame number of 2 (N=2) and a transmission time point of time point 1003.

[0162] Here, since the terminal recognizes the time point 1060 at which the configuration of the type 1 configured grant is executed, the type 1 configured grant actually used for transmission can be a type 1 configured grant resource applied after the time point. The transmission time point of the 0th (N=0) type 1 configured grant can be defined based on actually available resources, and then the transmission time point of the Nth configured grant can satisfy the following equation.

[0163] <equation 12>

[0164] [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (referenceTimeOffset × numberOfSymbolsPerSlot + shiftOffset + (N + m) × periodicity) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot)

[0165] Here, m is an integer value satisfying the time point (SFN, slot number in the frame, symbol number in the slot) of the first configured grant resource after the time point at which the configuration of the type 1 configured grant is executed. In other words, m is the smallest non-zero integer satisfying the following equation.

[0166] <equation 12-2>

[0167] [(SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot) + (slot number in the frame × numberOfSymbolsPerSlot) + symbol number in the slot] = (referenceTimeOffset × numberOfSymbolsPerSlot + shiftOffset + m × periodicity) modulo (1024 × numberOfSlotsPerFrame × numberOfSymbolsPerSlot)

[0168] In Figure 10In the illustrated embodiment, the SFN, slot number in the frame, and symbol number in the slot of the transmission time point of the first configured grant after the time point of performing the configuration of the type 1 configured grant satisfy the condition "m=2".

[0169] As Figure 10 illustrated, the base station can configure whether to change the offset of the time point of SFN=0 so that the period 1000 of the type 1 configured grant is constant. For example, the constant period can be applied only when the continue indicator is configured; if not, the offset can be equally applied to each SFN start time point (SFN=0).

[0170] Figure 11 illustrates a method of re-determining the transmission time point of the configured grant at each SFN (SFN=0).

[0171] As Figure 2 , 3 and 4, the time from each SFN start time point (SFN=0) to the transmission time point of the first type 1 configured grant can be changed by the period of the type 1 configured grant. To solve this problem, the terminal can determine the transmission time point of the type 1 configured grant by re-applying the offset value to each SFN start time point (SFN=0) 1130 and 1135 as indicated by reference numeral 1120. In this case, with reference to the last SFN start time point (SFN=0) 1135 just before the configured grant 1112, the interval between the configured grant 1111 just before the start time point 1135 and the configured grant 1112 just after the start time point 1135 can not coincide with the period 1100. However, the terminal can not understand the transmission time point of the type 1 configured grant differently according to the configuration time of the base station.

[0172] In Figure 11 the embodiment illustrated in FIG. 11, the method proposed can be applied only to a case where there is no problem in satisfying the quality of service (QoS) requirement of the terminal even if the period of the type 1 configured grant is not ensured. For this, a separate configuration can be applied. For example, the offset can be re-applied to each SFN start time point (SFN=0) only when the continue indicator is not configured.

[0173] Figure 12 illustrates a method of configuring a type 1 configured grant.

[0174] The base station 1210 can configure the terminal 1220 with the type 1 configured grant in the form of an RRC configuration / reconfiguration message as indicated by reference numeral 1230. The message can indicate whether the configured grant that has been configured is a type 1 CG or a type 2 CG. In addition, values such as a period of the configured grant, a time domain offset, and a reference SFN can be configured together based on the message. Based on the above information, the terminal can apply the configuration of the configured grant at the point in time at which the corresponding configuration message 1230 is received. If the configured grant is a type 1 configured grant, its configuration can be activated immediately, and the corresponding configured grant can be used.

[0175] Figure 13 FIG. 1 illustrates a structure of a base station according to an embodiment.

[0176] Referring to Figure 13 The base station can include a transceiver 1310, a controller 1320, and a memory 1330. In the present disclosure, the controller 1320 can be defined as a circuit or an application-specific integrated circuit or at least one processor.

[0177] The transceiver 1310 can transmit or receive a signal to or from another network entity. For example, the transceiver 1310 can transmit system information to a terminal and can transmit a synchronization signal or a reference signal thereto. In addition, according to one embodiment, the transceiver 1310 can transmit an RRC message including configuration of a type 1 configured grant to a terminal.

[0178] The controller 1320 can control the overall operation of the base station according to the embodiments proposed in the present disclosure. For example, the controller 1320 can control a signal flow between the respective blocks to perform the operations disclosed above.

[0179] The memory 1330 can store at least one of information transmitted or received through the transceiver 1310 and information generated through the controller 1320.

[0180] Figure 14 FIG. 1 illustrates a structure of a terminal according to an embodiment.

[0181] Referring to Figure 14 The terminal can include a transceiver 1410, a controller 1420, and a memory 1430. In the present disclosure, the controller can be defined as a circuit or an application-specific integrated circuit or at least one processor.

[0182] The transceiver 1410 can transmit or receive a signal to or from another network entity. For example, the transceiver 1410 can receive system information from a base station and can receive a synchronization signal or a reference signal therefrom. In addition, according to one embodiment, the transceiver 1410 can receive an RRC message including a type 1 configured grant from a base station.

[0183] The controller 1420 can control the overall operation of the terminal according to the embodiments proposed in the disclosure. For example, the controller 1420 can control the signal flow between the respective blocks to perform the operations disclosed above.

[0184] The memory 1430 can store at least one of information transmitted or received through the transceiver 1410 and information generated through the controller 1420.

[0185] Those skilled in the art will understand that other embodiments of the disclosure can be implemented without changing the technical idea or essential characteristics of the disclosure. Therefore, the embodiments disclosed herein should not be considered limiting in all aspects, but illustrative. The scope of the disclosure should not be determined by the above detailed description, but by the appended claims; and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be understood to fall within the scope of the disclosure.

[0186] Although specific terms have been used in the specification and drawings to describe and illustrate exemplary embodiments of the disclosure, they are used only in the general sense to easily explain the technical content of the disclosure and help understanding the disclosure, and are not intended to limit the scope of the disclosure. It is obvious to those skilled in the art that, in addition to the embodiments disclosed herein, other variations can be implemented based on the technical idea of the disclosure.

[0187] Although the disclosure has been described with various embodiments, various changes and modifications can be conceived by those skilled in the art. The disclosure is intended to include these changes and modifications within the scope of the appended claims.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: receiving, from a base station, configuration information on a configured grant, the configuration information including first information on an offset and second information indicating a value of a time reference system frame number (SFN); identifying a resource for initializing the configured grant based on the offset and a SFN to which the offset is applied, wherein the SFN is selected as a SFN having the value of the time reference SFN and being closest before a reception time of the configuration information; and transmitting, to the base station, data for the configured grant in the identified resource. 2.The method of claim 1, wherein the configuration information further includes third information associated with a symbol length, and wherein the third information is used to determine a symbol of the identified resource. 3.The method of claim 1, wherein the configuration information is received through a radio resource control (RRC) message, wherein the configured grant is a configured grant type 1, wherein the RRC message further includes information on a periodicity, and wherein an uplink transmission of the configured grant type 1 is performed based on the periodicity. 4.A method performed by a base station in a wireless communication system, the method comprising: transmitting, to a terminal, configuration information on a configured grant, the configuration information including first information on an offset and second information indicating a value of a time reference system frame number (SFN); and receiving, from the terminal, data for the configured grant starting in a resource, wherein the resource is identified based on the offset and a SFN to which the offset is applied, and wherein the system frame number is selected as a SFN having the value of the time reference SFN and being closest before a reception time of the configuration information in the terminal. 5.The method of claim 4, wherein the configuration information further includes third information associated with a symbol length, and wherein the third information is used to determine a symbol of the identified resource. 6.The method of claim 4, wherein the configuration information is transmitted through a radio resource control (RRC) message, wherein the configured grant is a configured grant type 1, wherein the RRC message further includes information on a periodicity, and wherein an uplink transmission of the configured grant type 1 is performed based on the periodicity. 7.A terminal in a wireless communication system, the terminal comprising: a transceiver; and a controller configured to: control the transceiver to receive, from a base station, configuration information on a configured grant, the configuration information including first information on an offset and second information indicating a value of a time reference system frame number (SFN); identify a resource for initializing the configured grant based on the offset and a SFN to which the offset is applied, wherein the SFN is selected as a SFN having the value of the time reference SFN and being closest before a reception time of the configuration information in the terminal; and control the transceiver to transmit data for the configured grant in the identified resource. 8.The terminal of claim 7, ​ wherein the configuration information further comprises third information associated with a symbol length, and wherein the controller is further configured to determine a symbol of the identified resource using the third information.

9. The terminal of claim 7, wherein the configuration information is received through a radio resource control (RRC) message, wherein the configured grant is a configured grant Type 1, wherein the RRC message further comprises information on a periodicity, and wherein the controller is further configured to perform the uplink transmission of the configured grant Type 1 based on the periodicity.

10. A base station in a wireless communication system, the base station comprising: a transceiver; and a controller configured to: control the transceiver to transmit, to a terminal, configuration information on a configured grant, the configuration information comprising first information on an offset and second information indicating a value of a time reference system frame number (SFN); and control the transceiver to receive, from the terminal, data for the configured grant starting in a resource, wherein the resource is identified based on the offset and a SFN to which the offset is applied, and wherein the SFN is selected as a SFN having the value of the time reference SFN and being closest before a time of reception of the configuration information.

11. The base station of claim 10, wherein the configuration information is transmitted through a radio resource control (RRC) message, wherein the configured grant is a configured grant Type 1, wherein the RRC message further comprises information on a periodicity, and wherein the uplink transmission of the configured grant Type 1 is performed based on the periodicity.

12. The base station of claim 10, wherein the configuration information further comprises third information associated with a symbol length, and wherein the third information is used to determine a symbol of the identified resource.

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