Operation method of terminal in wireless communication system and terminal

Abstract

The present invention provides an operation method of a terminal in a wireless communication system in which a RACH resource type is determined from sub-band full duplex communication (Sub-Band Full Duplex, SBFD), and a terminal. In the present invention, a terminal receives, from a base station, information on the maximum number of transmissions to a preamble by means of a sub-band full duplex communication (SBFD) symbol (symbol), and a method for transmitting the information on the maximum number of transmissions to the preamble by means of the SBFD symbol (symbol), and a terminal transmits the information on the maximum number of transmissions to the preamble by means of the SBFD symbol (symbol). According to the method, a terminal transmits at least one first lead code to a base station through a first random access channel (RACH) resource. And when the number of transmissions of at least one first preamble exceeds the maximum number of transmissions of the preamble passing through the SBFD symbol, the terminal determines a second RACH resource set in a non-(non-on)-SBFD symbol.

Description

TECHNICAL FIELD

[0001] The present specification relates to wireless communications applicable to 5G NR, 5G-Advanced, and 6G. BACKGROUND

[0002] As the times change, more and more communication devices require greater communication traffic, and require improved wireless broadband communication than the existing LTE system, that is, the next generation 5G system. In such a next-generation 5G system called NewRAT, communication scenarios are divided into enhanced mobile broadband (eMBB) / ultra-reliability and low-latency communication (URLLC) / massive machine-type communications (mMTC), etc.

[0003] Among them, eMBB is a next-generation mobile communication scenario with high spectral efficiency, high user experience data rate, high peak data rate, etc., URLLC is a next-generation mobile communication scenario with ultra-reliability, ultra-low latency, ultra-high availability, etc. (for example, V2X, emergency services, remote control), and mMTC is a next-generation mobile communication scenario with low cost, low energy consumption, short data packets, and massive connectivity features (for example, Internet of Things, IoT). SUMMARY

[0004] An object of the present specification is to provide an operation method of a terminal in a wireless communication system in which a RACH resource type can be effectively determined in sub-band full duplex communication and a terminal.

[0005] An embodiment of the present specification provides an operation method of a terminal in a wireless communication system, in which the terminal receives information on a maximum number of preamble transmissions through a sub-band full duplex (SBFD) symbol from a base station in a wireless communication system. The terminal transmits at least one first preamble through a first random access channel (RACH) resource from the base station. And, when the number of transmissions of the at least one first preamble exceeds the maximum number of preamble transmissions through the SBFD symbol, the terminal determines a second RACH resource set in a non-SBFD symbol.

[0006] Also, an embodiment of the present specification provides a terminal including at least one processor; and at least one memory storing instructions and operably electrically connected with the at least one processor, and based on the instructions, performing operations by the at least one processor, the operations being performed to receive, from a base station, information on a maximum transmission number of a preamble through a sub-band full duplex (SBFD) symbol. Transmitting at least one first preamble through a first random access channel (RACH) resource from the base station. And when a transmission number of the at least one first preamble exceeds the maximum transmission number of the preamble through the SBFD symbol, determining a second random access channel resource set in a non-SBFD symbol.

[0007] The terminal can transmit a second preamble to the base station through the determined second RACH resource.

[0008] The first RACH resource can be set in the SBFD symbol. And, the first RACH resource can correspond to a resource type selected in a RACH initialization phase.

[0009] Also, when the second preamble is transmitted by converting the resource type from the first RACH resource to the second RACH resource, an additional resource type conversion can not be considered.

[0010] Also, the first RACH resource can correspond to a resource type set in the SBFD symbol and the non-SBFD symbol.

[0011] Also, the first RACH resource corresponds to a first RACH occasion belonging to the SBFD symbol, and the second RACH resource corresponds to a second RACH occasion belonging to the non-SBFD symbol.

[0012] According to the disclosure of the present specification, a subband full duplex (SBFD) aware terminal performs a RACH procedure using a RACH occasion (RO) belonging not only to a non-SBFD symbol but also to an SBFD symbol, and when preamble transmission to the RO belonging to the SBFD symbol continuously fails, preamble transmission to the RO belonging to a non-SBFD symbol is performed. By this, it is possible to prevent continuous RACH transmission failure, and it is possible to reduce the delay of the RACH procedure which can occur thereby, and to prevent radio link failure of the terminal. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A diagram is shown to illustrate a wireless communication system.

[0014] Figure 2 A structure of a radio frame used in NR is shown.

[0015] Figures 3A to 3C An example diagram is shown to illustrate an example architecture for wireless communication services.

[0016] Figure 4 A slot structure of an NR frame is shown.

[0017] Figure 5 An example of a subframe type in NR is shown.

[0018] Figure 6 A structure of a self-contained slot is shown.

[0019] Figures 7A to 7B A general example of subband full duplex communication is shown.

[0020] Figures 8A to 8B An example of setting an uplink (UL) subband in a downlink (DL) slot according to an embodiment of the present specification is shown.

[0021] Figure 9 is a flowchart illustrating a terminal operation method according to an embodiment of the present specification.

[0022] Figure 10 is a procedure of a terminal and a base station according to an embodiment of the present specification.

[0023] Figure 11 is a procedure of a terminal and a base station according to another embodiment of the present specification.

[0024] Figure 12 is a flowchart illustrating a terminal operation method according to another embodiment of the present specification.

[0025] Figure 13 is a flowchart illustrating a terminal operation method according to another embodiment of the present specification.

[0026] Figure 14 An apparatus according to an embodiment of the present specification is illustrated.

[0027] Figure 15 A block diagram illustrating a configuration of a terminal according to an embodiment of the present specification is illustrated.

[0028] Figure 16 A block diagram illustrating a configuration of a processor implementing the processing disclosed in the present specification is illustrated.

[0029] Figure 17 A block diagram illustrating a configuration of a terminal according to an embodiment of the present specification is illustrated. Figure 14 A block diagram illustrating a configuration of a terminal according to an embodiment of the present specification is illustrated. Figure 15 A block diagram illustrating a configuration of a terminal according to an embodiment of the present specification is illustrated. DETAILED DESCRIPTION

[0030] Note that technical terms used in the present specification are used only for describing specific embodiments, and are not intended to limit the content of the present specification. In addition, unless otherwise defined in the present specification, technical terms used in the present specification should be interpreted as meanings commonly understood by those skilled in the art to which the present specification pertains, and should not be interpreted as excessively broad meanings or excessively narrow meanings. In addition, when technical terms used in the specification are inappropriate technical terms that cannot accurately express the content and ideas of the present specification, they should be understood to be replaced with technical terms that can be correctly understood by those skilled in the art. In addition, common terms used in the present specification should be interpreted according to the content defined in advance or the context, and should not be interpreted as excessively narrow meanings.

[0031] In addition, unless the context clearly indicates otherwise, the singular expression used in the present specification includes the plural expression. In the present application, the terms "comprise" or "have" and the like should not be interpreted as necessarily including all of the plurality of constituent elements or a plurality of steps described in the specification, but should be interpreted as also including a case where one part or a part of the steps are excluded, or a case where additional constituent elements or steps are included.

[0032] In addition, the terms including ordinal numbers such as "first", "second", and the like used in the present specification can be used to describe various constituent elements, but the constituent elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one constituent element from another. For example, a "first" constituent element can be named a "second" constituent element, and similarly, a "second" constituent element can be named a "first" constituent element without departing from the scope of the present application.

[0033] When it is referred to that one constitutional element is "connected" or "coupled" to another constitutional element, it can be directly connected or coupled to the other constitutional element or there can be another constitutional element in the middle. In contrast, when it is referred to that one constitutional element is "directly connected" or "directly coupled" to another constitutional element, it is understood that there is no other constitutional element in the middle.

[0034] Hereinafter, embodiments are described in detail with reference to the accompanying drawings, regardless of the figure number, the same or similar constitutional elements are given the same reference numerals and repetitive description thereof is omitted. Also, in describing the contents of the present invention, when it is judged that a specific description of the related known art can confuse the gist of the present specification, the detailed description is omitted. Also, it is noted that the accompanying drawings are used only to enable the contents and ideas of the present specification to be understood more easily and are not to be construed as limiting the contents and ideas of the present specification by the accompanying drawings. The contents and ideas of the present specification are to be construed as extending to all modifications, equivalents, and alternatives in addition to the accompanying drawings.

[0035] In the present specification, "A or B" can mean "A only", "B only", or "A and B all". In other words, in the present specification, "A or B" can be construed as "A and / or B". For example, in the present specification, "A, B, or C" can mean "A only", "B only", "C only", or "any combination of A, B and C all".

[0036] The slash ( / ) or comma used in the present specification can mean "and / or". For example, "A / B" can mean "A and / or B". Thus, "A / B" can mean "A only", "B only", or "A and B all". For example, "A, B, C" can mean "A, B or C".

[0037] In the present specification, "at least one of A and B" can mean "A only", "B only", or "A and B all". Also, in the present specification, the expression "at least one of A or B" or "at least one of A and / or B" can be construed identically to "at least one of A and B".

[0038] Also, in the present specification, "at least one of A, B and C" can mean "only A", "only B", "only C", or "any combination of A, B and C". Also, "at least one of A, B or C" or "at least one of A, B and / or C" can mean "at least one of A, B and C".

[0039] Also, the bracket used in the present specification can mean "for example". Specifically, when identified as "control information (PDCCH)", as one example of "control information", "PDCCH (physical downlink control channel)" can be proposed. In other words, "control information" of the present specification is not limited by "PDCCH", and "PDDCH" can be proposed as one example of "control information". Also, in the case of being identified as "control information (i.e., PDCCH)", "PDCCH" can be proposed as one example of "control information".

[0040] In the present specification, the technical features described in one drawing can be implemented independently or simultaneously.

[0041] In the drawings, a UE (User Equipment) is exemplarily shown, but the shown UE can also be referred to as a terminal (Terminal), a ME (Mobile Equipment), or the like. Also, the UE can be a portable device such as a notebook computer, a mobile phone, a PDA (Personal Digital Assistant), a smart phone (Smart Phone), a multimedia device, or the like, or a non-portable device such as a PC, a car-mounted device.

[0042] Hereinafter, the UE is used as an example of a device that can wirelessly communicate (example: a wireless communication device, a wireless device, or a wireless apparatus). The operation performed by the UE can be performed by any device that can wirelessly communicate. It can also be referred to as a device that can wirelessly communicate, a wireless communication device, a wireless device, or a wireless apparatus, or the like.

[0043] The term base station used below generally refers to a fixed station that communicates with a wireless device, and can be used as a generic term including eNodeB (evolved-NodeB), eNB (evolved-NodeB), BTS (Base Transceiver System), Access Point (AP), gNB (Next generation NodeB), RRH (remote radio head), TP (transmission point), RP (reception point), relay, etc.

[0044] The present specification describes embodiments using LTE systems, LTE-A systems, and NR systems, but the embodiments can also be applied to any communication system to which the described definitions are applied.

[0045] <Wireless communication system>

[0046] Benefiting from the success of LTE (long term evolution) / LTE-A (LTE-Advanced) for the fourth generation mobile communication, the fifth generation (so-called 5G) mobile communication as the next generation has completed commercialization and is undergoing follow-up research.

[0047] The fifth generation mobile communication defined by the International Telecommunication Union (ITU) refers to providing a maximum data transmission speed of 20 Gbps and a minimum tactile transmission speed of 100 Mbps or more at any location. The official name is "IMT-2020".

[0048] Three major usage scenarios are proposed in the ITU, such as eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communications).

[0049] URLLC relates to an application scenario that requires high reliability and low latency. For example, services such as autonomous driving, factory automation, and augmented reality require high reliability and low latency (e.g., latency of 1 ms or less). The latency of the current 4G (LTE) is 21-43 ms (best 10%), 33-75 ms (median) on a statistical basis. This is not sufficient to support services requiring latency of 1 ms or less. Then, the eMBB usage scenario relates to a usage scenario that requires mobile ultra-wideband.

[0050] That is, the 5th generation mobile communication system supports higher capacity than the current 4G LTE, can increase the density of mobile broadband users, supports D2D (Device to Device), high stability, and MTC (Machine type communication). In order to better realize the Internet of Things, 5G research and development also targets lower standby time and lower power consumption than 4G mobile communication systems. In order to such a 5G mobile communication, a new radio access technology (New RAT or NR) can be proposed.

[0051] The NR frequency band can be defined as two types (FR1, FR2) of frequency ranges. The numerical value of the frequency range can be changed, for example, the frequency ranges of the two types (FR1, FR2) can be as shown in Table 1. For ease of description, FR1 in the frequency range used by the NR system can mean "sub 6GHz range", FR2 can mean "above 6GHz range", which can be referred to as millimeter wave (mmW).

[0052] [Table 1]

[0053]

[0054] The numerical value of the frequency range of the NR system can be changed. For example, FR1 as shown in Table 1 can include a frequency band of 410MHz to 7125MHz. That is, FR1 can include a frequency band of 6GHz (or 5850, 5900, 5925MHz, etc.) or more. For example, the 6GHz (or 5850, 5900, 5925MHz, etc.) or more frequency band included in FR1 can include an unlicensed band. The unlicensed band can be used for various purposes, for example, it can be used for vehicle communication (for example, autonomous driving).

[0055] On the other hand, the 3GPP-based communication standard defines downlink physical channels corresponding to resource elements that carry information from the upper layer, and downlink physical signals corresponding to resource elements used by the physical layer but not carrying information from the upper layer. For example, a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical multicast channel (PMCH), a physical control format indicator channel (PCFICH), a physical downlink control channel (PDCCH), and a physical hybrid ARQ indicator channel (PHICH) are defined as downlink physical channels, and a reference signal and a synchronization signal are defined as downlink physical signals. A reference signal (RS) is also referred to as a pilot, meaning a signal of a special waveform known in advance to the gNB and the UE, such as a cell-specific RS, a UE-specific RS (UE-RS), a positioning RS (PRS), and a channel state information RS (CSI-RS), are defined as downlink reference signals. The 3GPP LTE / LTE-A standard defines uplink physical channels corresponding to resource elements that carry information from the upper layer, and uplink physical signals corresponding to resource elements used by the physical layer but not carrying information from the upper layer. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are defined as uplink physical channels, and a demodulation reference signal (DMRS) for uplink control / data signals and a sounding reference signal (SRS) for uplink channel measurement are defined.

[0056] In the present specification, PDCCH (Physical Downlink Control CHannel) / PCFICH (Physical Control Format Indicator CHannel) / PHICH ((Physical Hybrid automatic retransmit request Indicator CHannel) / PDSCH (Physical Downlink Shared CHannel) respectively refer to a set of time-frequency resources or a set of resource elements that carry DCI (downlink control information) / CFI (Control Format Indicator) / downlink ACK / NACK (ACKnowlegement / Negative ACK) / downlink data. In addition, PUCCH (Physical Uplink Control CHannel) / PUSCH (Physical Uplink Shared CHannel) / PRACH (Physical Random Access CHannel) respectively refer to a set of time-frequency resources or a set of resource elements that carry UCI (Uplink Control Information) / uplink data / random access signals.

[0057] Figure 1 A diagram of a wireless communication system is shown.

[0058] Referring to Figure 1 As is known, a wireless communication system includes at least one base station (BS). The BS is classified into a gNodeB (or gNB) 20-a and an eNodeB (or eNB) 20-b. The gNB 20-a supports a fifth generation mobile communication. The eNB 20-b supports a fourth generation mobile communication, i.e., LTE (long term evolution).

[0059] Each of the base stations 20-a and 20-b provides communication services for a specific geographic region (commonly referred to as a cell) 20-1, 20-2, 20-3. The cell can be further divided into a plurality of regions (referred to as sectors).

[0060] A UE (User Equipment) belongs to one cell in general, and the cell to which the UE belongs is referred to as a serving cell. A base station that provides a communication service to the serving cell is referred to as a serving BS. A wireless communication system is a cellular system, and thus there are other cells that neighbor the serving cell. The other cells that neighbor the serving cell are referred to as neighbor cells. A base station that provides a communication service to the neighbor cells is referred to as a neighbor BS. The serving cell and the neighbor cells are determined in relation to the UE.

[0061] Hereinafter, downlink refers to communication from the base stations 20-a, 20-b to the UE 10, and uplink refers to communication from the UE 10 to the base stations 20-a, 20-b. In the downlink, the transmitter can be part of the base stations 20-a, 20-b, and the receiver can be part of the UE 10. In the uplink, the transmitter can be part of the UE 10, and the receiver can be part of the base stations 20-a, 20-b.

[0062] On the other hand, a wireless communication system can be roughly classified into an FDD (frequency division duplex) scheme and a TDD (time division duplex) scheme. According to the FDD scheme, uplink transmission and downlink transmission are performed in mutually different frequency bands. According to the TDD scheme, uplink transmission and downlink transmission are performed in the same frequency band and at mutually different times. The channel response of the TDD scheme is substantially reciprocal. In a given frequency region, the downlink channel response and the uplink channel response are almost the same. Therefore, in a wireless communication system based on TDD, the downlink channel response has an advantage that can be obtained from the uplink channel response. In the TDD scheme, uplink transmission and downlink transmission are time-division performed on the entire frequency band, and thus downlink transmission by the base station and uplink transmission by the UE cannot be simultaneously performed. In a TDD system in which uplink transmission and downlink transmission are divided into subframe units, uplink transmission and downlink transmission are performed in mutually different subframes.

[0063] Figure 2 The structure of a radio frame used in NR is shown.

[0064] In NR, uplink and downlink transmission is constituted by a frame. A radio frame has a length of 10 milliseconds (ms) and is defined by 2 5 ms half-frames (HF). A half-frame is defined by 5 1 ms subframes (SF). A subframe is divided into one or more slots, and the number of slots within a subframe depends on the SCS (Subcarrier Spacing). Each slot includes 12 or 14 OFDM(A) symbols according to the CP (cyclic prefix). When a normal CP is used, each slot includes 14 symbols. When an extended CP is used, each slot includes 12 symbols. Among them, a symbol can include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or DFT-s-OFDM symbol).

[0065] <Supporting multiple numerologies>

[0066] In the NR system, as wireless communication technology develops, a plurality of numerologies can also be provided to a terminal. For example, when the SCS is 15 kHz, a wide area in a conventional cellular band is supported, when the SCS is 30 kHz / 60 kHz, a dense-urban, lower latency, and wider carrier bandwidth are supported, and when the SCS is 60 kHz or more, a bandwidth larger than 24.25 GHz is supported in order to overcome phase noise.

[0067] The numerology can be defined according to the CP (cycle prefix) length and the subcarrier spacing (Subcarrier Spacing: SCS). One cell can provide a plurality of numerologies to a terminal. When the index of the numerology is denoted by μ, the CP length corresponding to each subcarrier spacing can be as shown in the following table.

[0068] [Table 2]

[0069] μ Δf = 2 μ · 15 [kHz]] CP 0 15 Common 1 30 Common 2 60 Common, extended 3 120 Common 4 240 Common 5 480 Common 6 960 Common

[0070] For a normal CP, the number of OFDM symbols per slot (N slot symb ), the number of slots per frame (N frame,μ slot ), and the number of slots per subframe (N subframe,μ slot ) when the index of the numerology is denoted by μ are as shown in the following table.

[0071] [Table 3]

[0072] μ Δf = 2 μ · 15 [kHz] ] > N slot symb ]] N frame,μ slot ]] N subframe,μ slot ]]> 0 15 14 10 1 1 30 14 20 2 2 60 14 40 4 3 120 14 80 8 4 240 14 160 16 5 480 14 320 32 6 960 14 640 64

[0073] For extended CP, the number of OFDM symbols per slot (N slot symb ), the number of slots per frame (Nf rame,μ slot ), and the number of slots per subframe (N subframe,μ slot ) are as shown in the following table.

[0074] [Table 4]

[0075] μ SCS (15*2 u )]]> N slot symb ]]> N frame,μ slot ]]> N subframe,μ slot ]]> 2 60 KHz (u=2) 12 40 4

[0076] In the NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) can be set differently between a plurality of cells merged into one terminal. Therefore, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (for convenience, collectively referred to as TU (Time Unit)) composed of the same number of symbols can be set differently between the merged cells.

[0077] Figures 3A to 3C is an example diagram illustrating an example architecture for a wireless communication service.

[0078] Referring to Figure 3A , the UE is connected to a cell based on LTE / LTE-A and a cell based on NR in a DC (dual connectivity) manner.

[0079] The cell based on NR is connected to a core network for a legacy fourth-generation mobile communication, i.e., EPC (Evolved Packet Core).

[0080] Referring to Figure 3B , unlike Figure 3A , the cell based on LTE / LTE-A is connected to a core network for a fifth-generation mobile communication, i.e., a 5G core network.

[0081] A service mode based on the architectures illustrated in Figure 3A and Figure 3B is referred to as NSA (non-standalone).

[0082] Referring to Figure 3C , the UE is connected only to the cell based on NR. A service mode based on such an architecture is referred to as SA (standalone).

[0083] On the other hand, in the aforementioned NR, it is possible to consider using downlink subframes for receiving data from the base station and using uplink subframes for transmitting data to the base station. This approach can be applied to both paired and unpaired spectrum. A pair of spectrums means that two carrier spectrums are included for downlink and uplink operation. For example, in a pair of spectrums, a carrier may include a pair of downlink and uplink frequency bands.

[0084] Figure 4 The time slot structure of an NR frame is shown.

[0085] A time slot comprises multiple symbols in the time domain. For example, a time slot contains 14 symbols for a normal CP, while a time slot contains 12 symbols for an extended CP. A carrier comprises multiple subcarriers in the frequency domain. An RB (Resource Block) is defined in the frequency domain as multiple (e.g., 12) consecutive subcarriers. A BWP (Bandwidth Part) is defined in the frequency domain as multiple consecutive (physical, P) RBs, which can correspond to a set of parameters (e.g., SCS, CP length, etc.). A terminal can construct up to N (e.g., 4) BWPs in both the downlink and uplink. Downlink or uplink transmissions can be performed through active BWPs; at a given time, only one BWP established for the terminal can be active. In the resource grid, each element is called a resource element (RE), which can be mapped to a complex number of symbols.

[0086] Figure 5 This shows an example of subframe types in NR.

[0087] Figure 5 The TTI (transmission time interval) shown can be referred to as a subframe or time slot for NR (or new RAT). Figure 5 Subframes (or time slots) can be used in NR (or new RAT) TDD systems to minimize data transmission latency. For example... Figure 5 As shown, a subframe (or time slot) comprises 14 symbols. The first few symbols of a subframe (or time slot) can be used for the downlink (DL) control channel, and the last few symbols can be used for the uplink (UL) control channel. The remaining symbols can be used for either DL or UL data transmission. Based on this subframe (or time slot) structure, downlink and uplink transmissions can proceed sequentially within a single subframe (or time slot). Therefore, downlink data can be received within a subframe (or time slot), and uplink acknowledgment responses (ACK / NACK) can also be transmitted within the same subframe (or time slot).

[0088] Such a subframe (or slot) structure can be referred to as a self-contained subframe (or slot).

[0089] Specifically, the first N symbols within a slot can be used for transmission of a DL control channel (hereinafter referred to as a DL control region), and the last M symbols within a slot can be used for transmission of a UL control channel (hereinafter referred to as a UL control region). N and M are integers equal to or greater than 0, respectively. A resource region between the DL control region and the UL control region (hereinafter referred to as a data region) can be used for DL data transmission or for UL data transmission. For example, in the DL control region, a physical downlink control channel (PDCCH) can be transmitted, and in the DL data region, a physical downlink shared channel (PDSCH) can be transmitted. In the UL control region, a physical uplink control channel (PUCCH) can be transmitted, and in the UL data region, a physical uplink shared channel (PUSCH) can be transmitted.

[0090] If such a subframe (or slot) structure is used, there is an advantage that the time required to retransmit data that has received an error can be reduced to minimize the final data transmission standby time. In such a self-contained subframe (or slot) structure, a time gap can be required in the process of transitioning from a transmission mode to a reception mode or from a reception mode to a transmission mode. To this end, in the subframe structure, a part of the OFDM symbols when converting from DL to UL can be set as a guard period (GP).

[0091] Figure 6 A structure of a self-contained slot is shown.

[0092] In the NR system, a frame is characterized by a self-contained structure in which a DL control channel, a DL or UL data, a UL control channel, etc. can be all included in one slot. For example, the first N symbols in a slot can be used for transmission of a DL control channel (hereinafter, referred to as a DL control region), and the last M symbols in a slot can be used for transmission of a UL control channel (hereinafter, referred to as a UL control region). N and M are integers equal to or greater than 0, respectively. A resource region (hereinafter, referred to as a data region) between the DL control region and the UL control region can be used for DL data transmission or for UL data transmission. As one example, the following configuration can be considered. The intervals are listed in time order.

[0093] 1. DL only configuration

[0094] 2. UL only configuration

[0095] 3. Mixed UL-DL configuration

[0096] - DL region + GP (Guard Period) + UL control region

[0097] - DL control region + GP + UL region

[0098] DL region: (i) DL data region, (ii) DL control region + DL data region

[0099] UL region: (i) UL data region, (ii) UL data region + UL control region

[0100] In the DL control region, a PDCCH can be transmitted, and in the DL data region, a PDSCH can be transmitted. In the UL control region, a PUCCH can be transmitted, and in the UL data region, a PUSCH can be transmitted. In the PDCCH, a DCI (Downlink Control Information) such as DL data scheduling information, UL data scheduling information, etc. can be transmitted. In the PUCCH, a UCI (Uplink Control Information) such as ACK / NACK (Positive Acknowledgement / Negative Acknowledgement) information for DL data, CSI (Channel State Information) information, an SR (Scheduling Request), etc. can be transmitted. The GP can provide a time difference in a process in which a base station and a terminal transition from a transmission mode to a reception mode or in a process in which they transition from a reception mode to a transmission mode. A part of symbols at a point in time of transition from DL to UL within a subframe can be set as a GP.

[0101] Time Division Duplex (TDD) is a duplexing method widely applied to commercial New Radio (NR), i.e., 5G mobile communication systems. In TDD, time period radio resources are divided into downlink slots and uplink slots for use, and the downlink slots are distributed in a higher ratio than the uplink slots, usually according to the distribution ratio of uplink traffic and downlink traffic. However, this limitation of uplink slots has a negative impact in terms of coverage and delay time. Full duplex communication as a technology to solve this problem has recently received attention.

[0102] Full duplex is a technology that simultaneously performs transmission and reception using the same time and frequency resources, and is generally considered to be applied to simultaneous DL reception and UL transmission in the base station (5G, gNB). However, it is not limited thereto, and DL reception and UL transmission can also be simultaneously performed at the terminal side. In other words, both the base station and the terminal can support full duplex. However, unlike the base station, which is structurally facilitated for self-interference cancelation, the DL reception performance of the terminal is easily affected by self-interference from the UL transmission signal. Therefore, it is generally considered that the gNB operates in full duplex, and the terminal operates in half duplex. In addition, in order to reduce the effect of self-interference, the gNB also simultaneously performs DL transmission and UL reception, but can consider a subband non-overlapping full duplex method at one time in order to distinguish the frequency resources between DL / UL for transmission and reception.

[0103] Figures 7A to 7B A general example of subband full duplex is shown.

[0104] Subband full duplex can be referred to as subband full duplex (SBFD) or full duplex subband (FDSB).

[0105] In subband full duplex communication, a part of time-frequency resources on a given carrier is used for downlink, while a part of time-frequency resources on the same carrier is used for uplink. Specifically, downlink resources and uplink resources are distinguished from each other in the frequency domain and used for transmission and reception.

[0106] Figures 7A to 7B An example of SBFD is shown, but in the frequency domain Figure 7A An example in which uplink subbands are located between downlink subbands is shown, Figure 7B An example in which downlink subbands are located between uplink subbands is shown. Although not shown in the drawing, a guard band or a guard period can be located between the downlink subbands and the uplink subbands to reduce interference.

[0107] Figures 8A to 8B An example of setting uplink (UL) subbands in a downlink (DL) slot according to an embodiment of the present specification is shown.

[0108] Referring to Figure 8A and Figure 8B In a TDD configuration in which DL slots and UL slots are formed in a ratio of 4:1 (only some symbols of the last DL slot include a special slot for DL / UL transition, which is flexible), some (or all) of the corresponding DL slots can be set to support UL transmission of a terminal in any NR band. When setting an UL subband in any DL slot, as shown in Figure 8A and Figure 8B The corresponding UL subband can be set at the center or edge of the corresponding band, and a guard band can be set between the UL subband and the DL subband in the corresponding slot.

[0109] Meanwhile, in the case of the remaining frequency resources other than the UL subband and the guard band, according to the existing slot / symbol configuration information, they can be used as DL subbands for DL transmission. As shown in Figure 8A When the UL subband is formed at the center of the band, one guard band is formed in the upper and lower parts, respectively, with the corresponding UL subband as the center, for a total of two guard bands, and then one DL subband is formed in the upper and lower parts, respectively, with the corresponding guard band as the center, for a total of two DL subbands. Or, as shown inFigure 8B As shown, when the UL sub-band configuration is formed at the edge of the frequency band, a guard band and a DL sub-band can be configured after the corresponding UL sub-band.

[0110] The UL-DL slot configuration defined in the existing NR is defined to be formed in a cell unit through cell-specific RRC signaling. In other words, the pattern of DL symbols, UL symbols, and flexible symbols is configured through "tdd-UL-DL-ConfigurationCommon" as an RRC message / information for a corresponding DL-UL slot configuration. Additionally, only the flexible symbol configured through the "tdd-UL-DL-ConfigurationCommon" is re-allocated as an UL symbol, a DL symbol, or a flexible symbol per terminal through "tdd-UL-DL-ConfigurationDedicated" as terminal-specific RRC signaling. Alternatively, a method of indicating a dynamic slot format through a UE-group common PDCCH is also defined. For this, the dynamic slot format indication method through DCI format 2_0 is also supported in the NR.

[0111] According to the above-described existing slot configuration method, any one symbol can be configured or indicated by one of DL, UL, or flexible. For example, as shown in FIG. 1, the DL symbol, the UL symbol, and the flexible symbol are sequentially arranged in the time domain. For example, as shown in FIG. 1, the DL symbol, the UL symbol, and the flexible symbol are sequentially arranged in the time domain. Figure 8AAs shown, any slot format can be set to DDDSU by the existing slot configuration. D indicates that all OFDM symbols of the corresponding slot are set to DL by a downlink slot. U indicates that all OFDM symbols of the corresponding slot are set to UL by an uplink slot. S indicates a slot including flexible symbols for DL / UL transition by a special slot. Generally, in the case of a normal CP, the corresponding special slot can be composed of 12 DL symbols and 2 flexible symbols from a total of 14 symbols. Alternatively, it can be composed of 10 DL symbols, 2 flexible symbols, and 2 UL symbols. That is, within any one TDD carrier, one symbol is set or indicated by only one of DL, UL, or flexible.

[0112] However, as Figure 8A and Figure 8B shown, when the UL sub-band setting is formed in any DL slot, in the corresponding symbol, DL transmission or UL transmission can occur simultaneously per frequency resource. As such, in the present specification, a DL slot or symbol including a UL sub-band, or a UL slot or symbol including a DL sub-band is referred to as an SBFD slot or SBFD symbol.

[0113] In addition, in the present specification, a slot composed of only SBFD symbols is referred to as an SBFD slot, and a slot composed of only symbols according to the existing symbol setting (i.e., a slot composed of only symbols not including a UL sub-band, a DL sub-band, and a guard band) is referred to as a non-SBFD slot. Alternatively, a slot including at least one SBFD symbol can also be referred to as an SBFD slot.

[0114] Meanwhile, an idle / inactive terminal (UE) in the current NR performs a random access procedure for the purpose of initial access. Information about this is received through the "RACH-ConfigCommon IE" of the system information block 1 (SIB1). For a cell supporting 2-stage (2-step) RACH, "RACH-ConfigCommonTwoStepRA IE" is included so that the UE performs initial access through a 2-stage RA procedure. The corresponding IE can be referred to the standard specification TS 38.331.

[0115] If the base station supports subband non-overlapping full duplex communication, in the SBFD symbol or SBFD slot formed as described above in the UL subband setting, in order to transmit the PRACH preamble through the corresponding UL subband, in addition to the PRACH resource set in the non-SBFD slot, PRACH resources are additionally set. This not only increases the RACH resources of the UE, but also has the effect of improving the RACH delay problem that can occur in TDD. However, the SBFD region is defined to utilize a part of the existing DL resources, and thus, when the terminal transmits the PRACH preamble in the subband of the same slot / symbol, and sets the preamble transmission power of the same level as that of the non-SBFD slot / symbol, interference can occur in the DL of the SBFD slot / symbol. In consideration of such a problem, the transmission power of the RACH preamble transmitted in the SBFD slot / symbol should be set differently from the transmission power of the RACH preamble set in the non-SBFD slot / symbol.

[0116] However, the SBFD-aware UE can determine a higher transmission power when determining the PRACH transmission power for the PRACH transmission to the SBFD symbol, due to a higher path loss or power ramping due to continuous PRACH failures. In this case, if continuous PRACH transmission failures occur despite continuous PRACH transmission attempts, this can be considered to be due to high interference between the DL and UL subbands of the SBFD symbol or a lower transmission power compared to the transmission power of the non-SBFD symbol. Continuous PRACH transmission failures of the terminal can eventually lead to radio link failure (RLF) of the terminal, and thus, there is a problem of causing a decrease in overall system performance.

[0117] Although it is currently under For Further Study whether an SBFD-aware UE is allowed to attempt RACH to an RO belonging to a non-SBFD symbol, a solution is needed to address the above-described problematic situation, and a solution needs to be defined that allows even an SBFD-aware UE to select PRACH transmission through a non-SBFD symbol under certain conditions.

[0118] Figure 9 FIG. 1 is a flowchart illustrating a terminal operation method according to an embodiment of the present specification.

[0119] An embodiment of the present specification proposes a scheme of determining to perform only non-SBFD-based RACH when a terminal fails in SBFD-based RACH more than N times in a situation where both an RO belonging to an SBFD symbol and an RO belonging to a non-SBFD symbol exist, and a RACH procedure is triggered for an SBFD-aware UE. More specifically, it is proposed to limit the (n+1)th RACH retry to selecting only an RO belonging to a non-SBFD symbol when an SBFD-aware UE retries a RACH procedure using an RO belonging to an SBFD symbol continuously or discontinuously n times. The maximum number of RACH retries using an RO belonging to an SBFD symbol (sbfd-TransMax) can be set by a base station.

[0120] An SBFD-aware UE receives SBFD setting information and PRACH setting information related thereto, and based on the received setting information, can set not only legacy ROs (i.e., ROs belonging to non-SBFD symbols) but also additionally set ROs belonging to SBFD symbols.

[0121] Referring to Figure 9 , the terminal receives from the base station the maximum number of RACH retry (sbfd_TransMax) information (S901) through a sub-band full duplex (SBFD) symbol. Thereafter, if the preamble transmission counter (PREAMBLE_TRANSMISSION COUNTER) is the same as sbfd_TransMax, the UE sets only ROs (RACH Occasions) belonging to non-SBFD symbols as valid ROs (S902).

[0122] Figure 10 is a program illustrating a terminal and a base station according to an embodiment of the present specification.

[0123] The following describes a first scheme suggested in the present specification.

[0124] In the present invention, it is suggested that the terminal receives from the base station an SBFD-related setting information including sbfd-TransMax or a PRACH setting message. When the SBFD-aware UE receives sbfd-TransMax from the base station and additionally sets ROs belonging to SBFD symbols, the terminal confirms whether PREAMBLE_TRANSMISSION_COUNTER is equal to sbfd-TransMax+1 (or greater than sbfd-TransMax) each time the RACH procedure based on the SBFD symbol is performed. If PREAMBLE_TRANSMISSION_COUNTER is equal to sbfd-TransMax+1, even the SBFD-aware UE is set to select only ROs belonging to non-SBFD symbols.

[0125] When PREAMBLE_TRANSMISSION_COUNTER is compared with sbfd-TransMax, it can be assumed that, when ROs belonging to SBFD symbols are set in addition to legacy ROs, the SBFD-aware UE preferentially selects ROs belonging to SBFD symbols. That is, it means that, for the UE set to select only ROs belonging to SBFD symbols in RACH initialization, if the RACH procedure is performed through SBFD symbols for consecutive sbfd-TransMax times, but the RACH procedure is not successfully completed, the next RACH attempt of the UE selects only ROs belonging to non-SBFD symbols.

[0126] Hereinafter, a description will be given with reference toFigure 10 The operation of the terminal is specifically described.

[0127] The UE receives SBFD setting information from the base station. Also, RACH-related setting information including sbfd-TransMax information using ROs belonging to SBFD symbols is received (S1001).

[0128] Thereafter, when the RACH is triggered (S1002) and additionally, ROs belonging to SBFD symbols are set, the terminal sets the RA resource type to ROs belonging to SBFD symbols.

[0129] The terminal transmits a preamble to ROs belonging to SBFD symbols (S1003, S1005, S1007), and increases PREAMBLE_TRANSMISSION_COUNTER by 1 (S1004, S1006, S1008).

[0130] If PREAMBLE_TRANSMISSION_COUNTER is equal to sbfd-TransMax+1 (S1009), the Random Access (RA) resource type is set to only ROs belonging to non-SBFD symbols, and the RACH procedure is retried based on the related setting information, that is, a preamble is retransmitted to ROs belonging to non-SBFD symbols (S1010). Subsequently, PREAMBLE_TRANSMISSION_COUNTER is increased by 1 (S1011), and only ROs belonging to non-SBFD symbols are set to be valid (S1012). If PREAMBLE_TRANSMISSION_COUNTER is less than sbfd-TransMax+1, the RA resource selection procedure is performed on ROs belonging to SBFD symbols to retry the RACH procedure.

[0131] Hereinafter, a description will be given of the operation of the terminal and the base station according to another embodiment of the present specification with reference to the accompanying drawings. Figure 10 The operation of the base station is described.

[0132] The base station transmits information related to SBFD setting to the terminal. Also, RACH-related setting information including sbfd-TransMax information using ROs belonging to SBFD symbols is transmitted to the terminal (S1001).

[0133] Thereafter, the base station receives a preamble transmitted to ROs belonging to SBFD symbols or non-SBFD symbols from the terminal (S1003, S1005, S1007, S1010).

[0134] Figure 11 is a program illustrating a terminal and a base station according to another embodiment of the present specification.

[0135] The following describes a second scheme suggested in the present specification.

[0136] An SBFD-aware UE, which has set ROs belonging to non-SBFD symbols and ROs belonging to SBFD symbols, can select a first located RO in a RACH resource selection procedure (when ROs belonging to non-SBFD symbols and ROs belonging to SBFD symbols are both considered as valid ROs), but even the SBFD-aware UE cannot continuously select only ROs belonging to SBFD symbols. In this case, at the start point of transmitting a preamble, the terminal can select a first located RO among ROs belonging to SBFD symbols or non-SBFD symbols, and can select RACH resources of a different type (SBFD or non-SBFD) at each retransmission of the preamble. Thus, even if a terminal, which switches ROs of SBFD and non-SBFD symbols to perform RACH retries, has set sbfd-TransMax, but PREAMBLE_TRANSMISSION_COUNTER is equal to sbfd-TransMax+1, even the SBFD-aware UE is set to select only ROs belonging to non-SBFD symbols.

[0137] Hereinafter, a description will be made with reference to Figure 11 The operation of the terminal will be described in detail.

[0138] The UE receives SBFD setting information from the base station. Also, RACH-related setting information including sbfd-TransMax information, which is the maximum number of RACH attempts using ROs belonging to SBFD symbols, is received (S1101).

[0139] Thereafter, when RACH is triggered (S1102) and additionally, ROs belonging to SBFD symbols are set, the terminal sets both ROs belonging to SBFD symbols and ROs belonging to non-SBFD symbols as the RA resource type.

[0140] The terminal transmits a preamble to an RO belonging to SBFD symbols or an RO belonging to non-SBFD symbols (S1103, S1105, S1107), and increases PREAMBLE_TRANSMISSION_COUNTER by 1 (S1104, S1106, S1108).

[0141] If the PREAMBLE_TRANSMISSION_COUNTER is equal to sbfd-TransMax + 1 (S1109), the Random Access (RA) resource type is set to ROs belonging to non-SBFD symbols only, and the RACH procedure is retried based on the related setting information, i.e., the preamble is retransmitted to ROs belonging to non-SBFD symbols (S1110). Subsequently, the PREAMBLE_TRANSMISSION_COUNTER is increased by 1 (S1111), and only ROs belonging to non-SBFD symbols are set as valid (S1112). If the PREAMBLE_TRANSMISSION_COUNTER is less than sbfd-TransMax + 1, after ROs belonging to SBFD symbols and ROs belonging to non-SBFD symbols are both set as the RA resource type, the RA resource selection procedure is performed to retry the RACH procedure.

[0142] Hereinafter, a description will be given of a terminal and a base station according to another embodiment of the present specification. Figure 11 The operation of the base station will be described.

[0143] The base station transmits information related to SBFD setting to the terminal. Also, RACH-related setting information including sbfd-TransMax information, which is the maximum number of RACH attempts using ROs belonging to SBFD symbols, is transmitted to the terminal (S1101).

[0144] Thereafter, the base station receives a preamble transmitted to ROs belonging to SBFD symbols or non-SBFD symbols from the terminal (S1103, S1105, S1107, S1110).

[0145] Figure 12 is a procedure illustrating a terminal and a base station according to another embodiment of the present specification.

[0146] A third scheme suggested in the present specification will be described below.

[0147] The SBFD-aware UE, which has set the RO belonging to the non-SBFD symbol and the RO belonging to the SBFD symbol, can select the first located RO in the RACH resource selection procedure (when the RO belonging to the non-SBFD symbol and the RO belonging to the SBFD symbol are considered as valid ROs), and even the SBFD-aware UE cannot continuously select only the RO belonging to the SBFD symbol. In this case, at the beginning of the preamble transmission, the terminal can select the first located RO among the ROs belonging to the SBFD symbol or the non-SBFD symbol, and can select the RACH resource of a different type (SBFD or non-SBFD) at each retransmission of the preamble. Thus, when the terminal, which has been set sbfd-TransMax to perform the RACH retry by switching the RO of the SBFD and the non-SBFD symbol, selects the RO belonging to the SBFD symbol each time, a new SBFD_PREAMBLE_TRANSMISSION_COUNTER is additionally increased along with the increase of PREAMBLE_TRANSMISSION_COUNTER. That is, PREAMBLE_TRANSMISSION_COUNTER is increased by 1 at the time of the preamble transmission to the RO of the non-SBFD symbol and the preamble transmission to the RO of the SBFD symbol, and SBFD_PREAMBLE_TRANSMISSION_COUNTER is increased by 1 only at the time of the preamble transmission to the RO of the SBFD symbol. If SBFD_PREAMBLE_TRANSMISSION_COUNTER is equal to sbfd-TransMax+1, even the SBFD-aware UE is set to select only the RO belonging to the non-SBFD symbol.

[0148] Hereinafter, a description will be given with reference to the accompanying drawings. Figure 12 The operation of the terminal will be described in detail.

[0149] The UE receives the SBFD setting information from the base station. Also, the RACH-related setting information including the RACH attempt maximum number (sbfd-TransMax) information using the RO belonging to the SBFD symbol is received (S1201).

[0150] Thereafter, when the RACH is triggered (S1202) and the RO belonging to the SBFD symbol is additionally set, the terminal sets both the RO belonging to the SBFD symbol and the RO belonging to the non-SBFD symbol as the RA resource type. Also, a new SBFD_PREAMBLE_TRANSMISSION_COUNTER parameter is set (Set) to 0.

[0151] The terminal transmits a preamble to an RO belonging to an SBFD symbol or an RO of a non-SBFD symbol (S1203, S1205, S1207), and increases PREAMBLE_TRANSMISSION_COUNTER by 1 (S1204, S1206, S1208). When a preamble is transmitted to an RO belonging to an SBFD symbol, SBFD_PREAMBLE_TRANSMISSION_COUNTER is increased by 1 (S1204, S1208).

[0152] If SBFD_PREAMBLE_TRANSMISSION_COUNTER is equal to sbfd-TransMax + 1 (S1209), a Random Access (RA) resource type is set to only an RO belonging to a non-SBFD symbol, and a RACH procedure is retried based on related setting information, that is, a preamble is retransmitted to an RO belonging to a non-SBFD symbol (S1210). Subsequently, PREAMBLE_TRANSMISSION_COUNTER is increased by 1 (S1211), and only an RO belonging to a non-SBFD symbol is set to be valid (S1212). If SBFD_PREAMBLE_TRANSMISSION_COUNTER is less than sbfd-TransMax + 1, after an RO belonging to an SBFD symbol and an RO belonging to a non-SBFD symbol are both set to a RA resource type, a RA resource selection procedure is performed to thereby retry a RACH procedure.

[0153] Hereinafter, a terminal operation method according to another embodiment of the present specification will be described with reference to Figure 12 The operation of the base station will be described.

[0154] The base station transmits information related to an SBFD setting to the terminal. Also, RACH-related setting information including information of a maximum number of RACH attempts using an RO belonging to an SBFD symbol (sbfd-TransMax) is transmitted to the terminal (S1201).

[0155] Thereafter, the base station receives a preamble transmitted to an RO belonging to an SBFD symbol or an RO of a non-SBFD symbol from the terminal (S1203, S1205, S1207, S1210).

[0156] Figure 13 FIG. 11 is a flowchart illustrating a terminal operation method according to another embodiment of the present specification.

[0157] Reference will be made to Figure 13The terminal receives information on a maximum number of preamble transmissions through a sub-band full duplex (SBFD) symbol from a base station (S1301). The terminal transmits at least one first preamble to the base station through a first random access channel (RACH) resource (S1302). Also, when the number of transmissions of the at least one first preamble exceeds the maximum number of preamble transmissions through the SBFD symbol, the terminal determines a second RACH resource disposed in a non-SBFD symbol (S1303).

[0158] The terminal can transmit a second preamble to the base station through the determined second RACH resource.

[0159] The first RACH resource can be disposed in the SBFD symbol. Also, the first RACH resource can correspond to a resource type selected in a RACH initialization phase.

[0160] In addition, when the second preamble is transmitted by converting the resource type from the first RACH resource to the second RACH resource, an additional resource type conversion can not be considered.

[0161] In addition, the first RACH resource can correspond to a resource type disposed in the SBFD symbol and the non-SBFD symbol.

[0162] In addition, the first RACH resource corresponds to a first RACH occasion belonging to the SBFD symbol, and the second RACH resource corresponds to a second RACH occasion belonging to the non-SBFD symbol.

[0163] The disclosure of the present specification explained so far can be implemented in various ways. For example, the disclosure of the present specification can be implemented by hardware, firmware, software, or a combination of these, etc. Specifically, the following will be described in conjunction with the accompanying drawings.

[0164] Figure 14 An apparatus of an embodiment of the present specification is illustrated.

[0165] Referring to Figure 14 The wireless communication system can include a first apparatus 100a and a second apparatus 100b.

[0166] The first device 100a can be a base station, a network node, a transmission terminal, a reception terminal, a wireless device, a wireless communication equipment, a vehicle, a vehicle equipped with an autonomous driving function, a connected car, an unmanned aerial vehicle (UAV), an AI module, a robot, an AR device, a VR device, an MR device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a financial technology device (or a financial device), a security device, a climate / environment device, a 5G service related device, or a device related to a fourth industrial revolution field other than the above.

[0167] The second device 100b can be a base station, a network node, a transmission terminal, a reception terminal, a wireless device, a wireless communication equipment, a vehicle, a vehicle equipped with an autonomous driving function, a connected car, an unmanned aerial vehicle (UAV), an AI module, a robot, an AR device, a VR device, an MR device, a hologram device, a public safety device, an MTC device, an IoT device, a medical device, a financial technology device (or a financial device), a security device, a climate / environment device, a 5G service related device, or a device related to a fourth industrial revolution field other than the above.

[0168] The first device 100a can include at least one or more processors such as a processor 1020a, at least one or more memories such as a memory 1010a, at least one or more transceivers such as a transceiver 1031a. The processor 1020a can perform the aforementioned functions, steps, and / or methods. The processor 1020a can perform one or more protocols. For example, the processor 1020a can perform one or more layers of a wireless interface protocol. The memory 1010a can be connected with the processor 1020a and store various forms of information and / or instructions. The transceiver 1031a can be connected with the processor 1020a and control transceiving wireless signals.

[0169] The second device 100b can include at least one processor such as a processor 1020b, at least one memory device such as a memory 1010b, at least one transceiver such as a transceiver 1031b. The processor 1020b can perform the aforementioned functions, steps, and / or methods. The processor 1020b can implement one or more protocols. For example, the processor 1020b can implement one or more layers of a radio interface protocol. The memory 1010b can be connected with the processor 1020b and store various forms of information and / or instructions. The transceiver 1031b can be connected with the processor 1020b and control transceiving of wireless signals.

[0170] The memory 1010a and / or the memory 1010b can be connected with the processor 1020a and / or the processor 1020b, respectively, either internally or externally, or connected with other processors through various technologies such as wired or wireless connections.

[0171] The first device 100a and / or the second device 100b can have one or more antennas. For example, the antenna 1036a and / or the antenna 1036b can be configured to transceive wireless signals.

[0172] Figure 15 A block diagram showing a configuration of a terminal according to an embodiment of the present specification.

[0173] In particular Figure 15 is a diagram showing a configuration of a device according to the aforementioned Figure 14 embodiment in more detail.

[0174] The device includes a memory 1010, a processor 1020, a transceiving unit 1031, a power supply unit 1090 including a power management module 1091 and a battery 1092, a display device 1041, an input unit 1053, a speaker 1042 and a microphone 1052, a SIM (subscriber identification module) card, one or more antennas.

[0175] The processor 1020 can be configured to implement proposed functions, steps, and / or methods in the description. Layers of the radio interface protocol can be implemented in the processor 1020. The processor 1020 can include an application-specific integrated circuit (ASIC), other chipsets, logic circuits, and / or data processing devices. The processor 1020 can be an application processor (AP). The processor 1020 can include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), a modem, and / or the like. The processor 1020, for example, can be a a SNAPDRAGON™ series processor manufactured by Qualcomm®, an EXYNOS™ series processor manufactured by Samsung®, an A series processor manufactured by Apple®, a HELIO™ series processor manufactured by Intel®, an ATOM™ series processor manufactured by Intel®, a KIRIN™ series processor manufactured by HiSilicon®, or the like. a KIRIN™ series processor manufactured by HiSilicon®, or the like.

[0176] The power management module 1091 manages power supplied to the processor 1020 and / or the transceiver 1031. The battery 1092 supplies power to the power management module 1091. The display device 1041 outputs results of processes performed by the processor 1020. The input device 1053 receives an input to be used by the processor 1020. The input device 1053 can be displayed on the display device 1041. The SIM card is an integrated circuit for identifying and authenticating a subscriber of a network for mobile devices such as mobile phones and computers, and uses for securely storing keys and subscription information. Phone book information can also be stored in many SIM cards.

[0177] The memory 1010 is operatively coupled with the processor 1020 and stores information relative to the operation of the processor 1020. The memory 1010 can include a ROM (Read Only Memory), a RAM (Random Access Memory), a flash memory, a memory card, a storage medium and / or other storage device. When the embodiments are implemented in software, the techniques described in this specification can be implemented using a module (for example, procedures, functions, and so on) that performs the functions described in this specification. The module can be stored in the memory 1010 and executed by the processor 1020. The memory 1010 can be implemented within the processor 1020. Alternatively, the memory 1010 can be implemented outside the processor 1020 and can communicate with the processor 1020 via various means as is well known in the art.

[0178] The transceiver 1031 is operatively coupled with the processor 1020 and transmits and / or receives a radio signal. The transceiver 1031 includes a transmitter and a receiver. The transceiver 1031 can include a baseband circuit for processing a radio frequency signal. The transceiver 1031 can control one or more wires to transmit and / or receive a radio signal. To start communication, the processor 1020 issues instruction information to the transceiver 1031 to transmit a radio signal, for example, constituting voice communication data. An antenna performs a function of transmitting and receiving a radio signal. When receiving a radio signal, the transceiver 1031 can issue a signal and convert the signal into a baseband to be processed by the processor 1020. The processed signal can be converted into audible or visual information output through the speaker 1042.

[0179] The speaker 1042 outputs sound-related results processed by the processor 1020. The microphone 1052 receives sound-related input to be used by the processor 1020.

[0180] The user inputs instruction information such as a phone number by, for example, pressing a button (or touching) of the input unit 1053 or by voice activation based on the microphone 1052. The processor 1020 processes the instruction information received to perform an appropriate function such as dialing a phone number. Operational data can be extracted from a SIM card or the memory 1010. In addition, the processor 1020 can display the instruction information or operational information on the display device 1041 to be recognized by the user to provide convenience.

[0181] Figure 16 A block diagram illustrating a configuration of a processor implementing the disclosure of the specification is shown.

[0182] Reference Signs Figure 16It is known that the processor 1020 realizing the disclosure of the present specification can include a plurality of circuitry to realize the functions, steps, and / or methods described and proposed in the present specification. For example, the processor 1020 can include a first circuitry 1020-1, a second circuitry 1020-2, and a third circuitry 1020-3. In addition, although not shown, the processor 1020 can include more circuitry. Each circuitry can include a plurality of transistors.

[0183] The processor 1020 can also be referred to as an ASIC (application-specific integrated circuit) or an AP (application processor), and can include at least one of a DSP (digital signal processor), a CPU (central processing unit), and a GPU (graphics processing unit).

[0184] Figure 17 To show in detail Figure 14 The transmitter or the receiver of the first device shown Figure 15 The block diagram of the hair receiving part of the device shown.

[0185] Referring to Figure 17 The hair receiving part 1031 includes a transmitter 1031-1 and a receiver 1031-2. The transmitter 1031-1 includes a DFT (Discrete Fourier Transform) part 1031-11, a subcarrier mapper 1031-12, an IFFT part 1031-13, and a CP insertion part 1031-14, and a wireless transmission part 1031-15. The transmitter 1031-1 can further include a modulator. In addition, for example, a scramble unit (not shown), a modulation mapper (not shown), a layer mapper (not shown), and a layer permutator (not shown) can be further included, which can be disposed in front of the DFT part 1031-11. That is, in order to prevent an increase in PAPR (peak-to-average power ratio), the transmitter 1031-1 first passes information through the DFT 1031-11 before mapping the signal to the subcarrier. The signal spread (or synonymously precoded) by the DFT part 1031-11 is subcarrier-mapped by the subcarrier mapper 1031-12, and then passes through the IFFT (Inverse Fast Fourier Transform) part 1031-13 to be formed as a signal on the time axis.

[0186] The DFT section 1031-11 performs DFT on the inputted symbols to output complex-valued symbols. For example, if Ntx symbols are inputted (but Ntx is a natural number), the DFT size is Ntx. The DFT section 1031-11 can be referred to as a transform precoder. The subcarrier mapper 1031-12 maps the complex-valued symbols to subcarriers in the frequency domain. The complex-valued symbols can be mapped to resource elements corresponding to the resource blocks allocated for data transmission. The subcarrier mapper 1031-12 can be referred to as a resource element mapper. The IFFT section 1031-13 can perform IFFT on the inputted symbols to output a baseband signal for data as a time-domain signal. The CP insertion section 1031-14 copies a rear portion of the baseband signal for data and inserts it into a front portion of the baseband signal for data. By the CP insertion, ISI (Inter-Symbol Interference), ICI (Inter-Carrier Interference) can be prevented, and orthogonality can be maintained in multiplexed channels.

[0187] On the other hand, the receiver 1031-2 includes a wireless reception section 1031-21, a CP removal section 1031-22, a FFT section 1031-23, and an equalization section 1031-24, and the like. The wireless reception section 1031-21, the CP removal section 1031-22, the FFT section 1031-23 of the receiver 1031-2 perform the reverse functions of the wireless transmission section 1031-15, the CP insertion section 1031-14, the IFFT section 1031-13 of the transmitter 1031-1. The receiver 1031-2 can further include a demodulator.

[0188] The above-described preferred embodiments are illustrative only, and the disclosure of the present specification is not limited to the specific embodiments described herein, and thus can be modified, changed, or improved in various forms within the scope of the idea and the claims of the present specification.

[0189] In the above-described exemplary system, the method is described as a series of steps or blocks based on the flowchart, but is not limited to the order of the steps described, and certain steps can be performed in a different order from that described or simultaneously. In addition, it will be understood by those skilled in the art that the steps shown in the flowchart are not exclusive, and other steps can be included or one or more steps of the flowchart can be deleted without affecting the scope of the rights.

[0190] The claims recited in the specification can be combined in various ways. For example, the technical features of the method claims recited in the specification can be combined and implemented by an apparatus, the technical features of the apparatus claims recited in the specification can be combined and implemented as a method. In addition, the technical features of the method claims recited in the specification and the technical features of the apparatus claims recited in the specification can be combined and implemented by an apparatus, the technical features of the method claims recited in the specification and the technical features of the apparatus claims recited in the specification can be combined and implemented as a method.

Claims

1. An operation method of a terminal in a wireless communication system, the method comprising: receiving information on a maximum number of preamble transmissions through a sub-band full duplex communication symbol; transmitting at least one first preamble through a first random access channel resource; and determining a second random access channel resource set in a non-sub-band full duplex communication symbol when a number of transmissions of the at least one first preamble exceeds the maximum number of preamble transmissions through the sub-band full duplex communication symbol. 2.The method of claim 1, further comprising: transmitting a second preamble through the determined second random access channel resource. 3.The method of claim 2, wherein the first random access channel resource is set in the sub-band full duplex communication symbol. the first random access channel resource corresponds to a resource type selected in a random access channel initialization phase.

4. The method of claim 3, wherein, an additional resource type switching is not considered when the resource type is switched from the first random access channel resource to the second random access channel resource to transmit the second preamble.

5. The method of claim 3, wherein, 6.The method of claim 1, wherein the first random access channel resource corresponds to a resource type set in the sub-band full duplex communication symbol and the non-sub-band full duplex communication symbol. the first random access channel resource corresponds to a first random access channel occasion belonging to the sub-band full duplex communication symbol, and the second random access channel resource corresponds to a second random access channel occasion belonging to the non-sub-band full duplex communication symbol.

7. The method of claim 1, wherein, 8.A terminal in a wireless communication system, the terminal comprising: at least one processor; and at least one memory storing instructions and operatively connected to the at least one processor, and based on the instructions, the at least one processor performs operations, the operations performed including: receiving information on a maximum number of preamble transmissions through a sub-band full duplex communication symbol; transmitting at least one first preamble through a first random access channel resource; and determining a second random access channel resource set in a non-sub-band full duplex communication symbol when a number of transmissions of the at least one first preamble exceeds the maximum number of preamble transmissions through the sub-band full duplex communication symbol. based on the instructions, the at least one processor performs operations, the operations performed further including:

9. The terminal according to claim 8, wherein transmitting a second preamble through the determined second random access channel resource. the first random access channel resource is set in the sub-band full duplex communication symbol.

10. The terminal according to claim 9, wherein the first random access channel resource corresponds to a resource type selected in a random access channel initialization phase.

11. The terminal according to claim 10, wherein an additional resource type switching is not considered when the resource type is switched from the first random access channel resource to the second random access channel resource to transmit the second preamble.

12. The terminal of claim 10, wherein, the first random access channel resource corresponds to a resource type set in the sub-band full duplex communication symbol and the non-sub-band full duplex communication symbol.

13. The terminal of claim 8, wherein, ​ 14. The terminal of claim 8, wherein, The first random access channel resource corresponds to a first random access channel occasion belonging to the sub-band full-duplex communication symbol, and the second random access channel resource corresponds to a second random access channel occasion belonging to the non-sub-band full-duplex communication symbol.

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