Communication based on SBFD related Symbol Configuration

Abstract

This document relates to a method for performing communication based on SBFD (Sub-Band Full Duplex) symbol settings and an apparatus for doing so. A communication method of a user device (UE) for this purpose is characterized by including: receiving TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information from a network; receiving cell-specific first full duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information that changes one or more first FD related symbols according to the cell-specific first FD related setting information; and performing communication with the network through one or more second FD related symbols according to the second FD related setting information.

Description

Technology Field

[0001] The following description relates to SBFD (Sub-Band Full Duplex) based communication, specifically to a method in which a user device (UE) sets SBFD-related symbols and communicates with a network based thereon, and to a device for doing so. Background Technology

[0002] Various technologies such as LTE, LTE-Advanced, and WiFi are used in wireless communication systems, and 5G is also included here.

[0003] Figure 1 shows the structure of a system for 5G communication.

[0004] Referring to FIG. 1, the NG-RAN (Next Generation - Radio Access Network) may include a base station (20) that provides user plane and control plane protocol termination to the UE (10). For example, the base station (20) may include a gNB (next generation-Node B) and / or an eNB (evolved-Node B). For example, the UE (10) may be fixed or mobile and may be referred to by other terms such as terminal, MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), MT (Mobile Terminal), or Wireless Device. For example, the base station may be a fixed station communicating with the UE (10) and may be referred to by other terms such as BTS (Base Transceiver System) or Access Point.

[0005] The example in FIG. 1 illustrates a case including only gNB. Base stations (20) can be connected to each other via Xn interfaces. Base stations (20) can be connected to a 5th generation core network (5G Core Network: 5GC) via NG interfaces. More specifically, base stations (20) can be connected to an access and mobility management function (AMF) (30) via an NG-C interface and to a user plane function (UPF) (30) via an NG-U interface.

[0007] Meanwhile, new service types such as XR (Extended Reality), AI-based services, and self-driving cars are emerging in 5G. These services are characterized by dynamic traffic in both DL and UL directions, and require low latency for packet transmission. In 5G services, traffic load can increase explosively to support these various new use cases.

[0008] On the other hand, existing semi-static or dynamic TDD UL / DL configurations may be constrained by transmission time delays and interference issues between operators. Existing FDD methods may have limitations in terms of efficient frequency resource utilization in the DL / UL direction. Therefore, the introduction of full-duplex (FD) operation within a single carrier is being discussed to achieve low latency and efficient resource utilization in NR. The problem to be solved

[0009] In order to solve the problem described above, one aspect of the present invention proposes a Sub-Band Full Duplex (SBFD) based communication method applicable to 5G or subsequent next-generation mobile communication systems.

[0010] The technology proposed below is assumed to be applicable not only to current 5G systems but also to 6G and subsequent mobile communication systems; therefore, although the term 'SBFD' used in 5G may be referred to by other terms related to FD, the term 5G will be used for the following explanation for convenience.

[0011] In one aspect of the present invention, a method and apparatus are proposed for efficiently setting FD-related symbols (SBFD symbols) for a UE based on TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information.

[0012] In addition, according to the embodiment, when setting FD-related symbols (SBFD symbols) as cell-specific setting information, we intend to define whether additional cell-specific settings or user-specific (UE specific) settings are configured and the relationship between them.

[0013] In addition, according to the embodiment, we propose a specific signaling method for adding or disabling FD-related symbols (SBFD symbols) based on additional settings, based on cell-specific setting information.

[0015] Meanwhile, in another aspect of the present invention, when a network sets an FD-related subband (SBFD subband) to a UE, when the FD-related subband (SBFD subband) is set as cell-specific setting information, the invention aims to define whether to set it in an additional cell-specific or user-specific (UE-specific) manner and the relationship between them.

[0016] In addition, according to an embodiment, the relationship between the setting information for the activated Bandwidth Part (BWP) and the setting of the subband described above is to be defined.

[0018] The problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below. means of solving the problem

[0019] In one aspect of the present invention for solving the problem described above, a communication method of a UE is proposed, wherein the UE performs communication with a network in a mobile communication system, the method comprises receiving TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information from the network; receiving cell-specific first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information that changes one or more first FD related symbols according to the cell-specific first FD related setting information; and performing communication with the network according to the second FD related setting information.

[0020] The above second FD related setting information may assign an additional third FD related symbol to the above first FD related symbol, and the above third FD related symbol may be set consecutively with the above first FD related symbol to one or more of the DL symbol or variable symbol according to the above TDD UL-DL pattern.

[0021] The above second FD related setting information can represent the maximum range of a third FD related symbol in addition to the first FD related symbol in a cell-specific manner.

[0022] One or more of the above 3rd FD related symbols may be based on 3rd FD related configuration information represented in a UE-specific manner.

[0023] In addition, the above-mentioned second FD-related configuration information can be received through SFI (Slot Format Indication) - RNTI (Radio Network Temporary Identifier) ​​or DCI (Downlink Control Information) scrambled by FD-related - RNTI.

[0024] The above DCI may have a bitmap format that represents the number of third FD-related symbols additionally allocated prior to the first FD-related symbol and the number of third FD-related symbols additionally allocated following the first FD-related symbol in the form of a combination.

[0025] Additionally, the first FD-related symbol may be set consecutively to one or more of the DL symbol or variable symbol according to the TDD UL-DL pattern, and the second FD-related setting information may disable one or more of the first FD-related symbols.

[0026] At this time, the second FD related setting information may additionally include receiving dynamic third FD related setting information that disables the first FD related symbol and assigns the third FD related symbol within the range of the first FD related symbol.

[0027] Additionally, after receiving the second FD-related configuration information, the UE communicates with the network without FD-related operations, and after receiving the third FD-related configuration information, it may also communicate with the network through the third FD-related symbol.

[0028] Meanwhile, communication with the network can be performed based on the second FD related setting information after a predetermined offset period following the reception of the second FD related setting information.

[0029] The above FD-related symbols may include SBFD (Sub-Band Full Duplex) symbols, but the present invention does not exclude changes to the terminology thereto.

[0030] In addition, when the TDD UL-DL pattern information sets a plurality of TDD UL-DL patterns, the first and second FD related setting information can set the FD related symbols for each of the plurality of TDD UL-DL patterns.

[0031] Meanwhile, in another aspect of the present invention for solving the problem described above, a communication method of a network is proposed, wherein the network performs communication with a user device (UE) in a mobile communication system, the method comprises: transmitting TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information to the UE; transmitting cell-specific first full duplex (FD) related setting information based on the TDD UL-DL pattern information to the UE; transmitting second FD related setting information that changes one or more first FD related symbols according to the cell-specific first FD related setting information; and performing communication with the UE according to the second FD related setting information.

[0032] In addition, in another aspect of the present invention, a user device (UE) that communicates with a network in a mobile communication system is proposed, comprising: at least one processor; and at least one computer memory that can be operably connected to the at least one processor and stores instructions that cause the at least one processor to perform operations when executed, wherein the operations include receiving TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information from the network; receiving cell-specific first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information that changes one or more first FD related symbols according to the cell-specific first FD related setting information; and communicating with the network according to the second FD related setting information.

[0033] In addition, another aspect of the present invention proposes a network for communicating with a user device (UE) in a mobile communication system, comprising: at least one processor; and at least one computer memory that can be operably connected to the at least one processor and stores instructions that, when executed, cause the at least one processor to perform operations, wherein the operations include transmitting TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information to the UE; transmitting cell-specific first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information to the UE; transmitting second FD related setting information that changes one or more first FD related symbols according to the cell-specific first FD related setting information; and communicating with the UE according to the second FD related setting information. Effects of the invention

[0034] According to the embodiments of the present invention as described above, the network can efficiently set FD-related symbols (SBFD symbols) to the UE based on TDD UL-DL pattern setting information.

[0035] In addition, according to the embodiment, when setting FD-related symbols (SBFD symbols) as cell-specific setting information, the relationship between additional cell-specific settings or user-specific settings and whether to set them can be defined, thereby allowing for flexible adaptation to the communication environment.

[0036] In addition, according to the embodiment, a specific signaling method may be provided to add or disable FD-related symbols (SBFD symbols) according to additional settings based on cell-specific setting information.

[0038] Meanwhile, in another aspect of the present invention, when a network sets an FD-related subband (SBFD subband) to a UE, when setting the FD-related subband (SBFD subband) as cell-specific setting information, the relationship between additional cell-specific or user-specific settings and whether to set them can be defined, thereby ensuring flexibility in the frequency domain as well.

[0039] In addition, according to the embodiment, the relationship between the setting information for the activated BWP and the setting of the subband described above can be defined to clearly define the operation of the UE.

[0040] The effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0041] Figure 1 shows the structure of a system for 5G communication. Figure 2 is a diagram illustrating how to perform FD operation in 5G. Figures 3 and 4 are diagrams for explaining the comparison between SBFD and SSFD during FD operation in 5G. FIG. 5 is a diagram illustrating a method for a UE and a network to communicate based on FD-related symbol / subband settings according to an embodiment of the present invention. FIG. 6 is a diagram illustrating the TDD UL-DL pattern setting according to one embodiment of the present invention. FIG. 7 is a diagram illustrating the SBFD symbol setting considering the TDD UL-DL pattern according to one embodiment of the present invention. FIGS. 8 and 9 are drawings for specifically explaining the concept of an activated BWP according to an embodiment of the present invention. FIG. 10 is a diagram illustrating a method for assigning additional SBFD symbols according to an embodiment of the present invention. FIG. 11 is a diagram illustrating a method of deactivating a first FD-related symbol and performing dynamic allocation according to an embodiment of the present invention. FIG. 12 is a diagram illustrating an example of signaling between a UE and a network according to the embodiment of FIG. 11. FIGS. 13 and FIGS. 14 are drawings for illustrating a method of indicating a dynamic SBFD symbol according to embodiments of the present invention. FIGS. 15 and 16 are drawings for explaining a method of allocating additional subbands based on second FD related setting information according to an embodiment of the present invention. FIGS. 17 and 18 are drawings illustrating a method for allocating dynamic SBFD subbands based on candidate subbands according to an embodiment of the present invention. FIG. 19 illustrates a wireless device that can be applied to the present technology. Specific details for implementing the invention

[0042] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0043] Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0045] As described above, one aspect of the present invention proposes a method and apparatus for a UE to set SBFD-related symbols / subbands and to communicate with a network based thereon. To this end, the FD method being discussed in 5G will first be explained in detail.

[0046] Figure 2 is a diagram illustrating how to perform FD operation in 5G.

[0047] Referring to FIG. 2, the method of applying FD operation in the intra-carrier is illustrated. Specifically, the FD operation may be considered as the SBFD (Sub-Band Full Duplex) method illustrated in FIG. 2 (a) and the SSFD (Spectrum-Sharing Full Duplex) method illustrated in FIG. 2 (b).

[0048] In the case of SBFD, transmission and reception between DL and UL can be performed using different frequency resources on the same carrier. That is, DL and UL can have different frequency resources for the same time resource. In the case of SSFD, transmission and reception between DL and UL are performed using the same frequency resource or overlapping frequency resources on the same carrier. That is, DL and UL can be assigned the same or overlapping frequency resources for the same time resource.

[0049] In the case of SBFD, considering the non-overlapping features that distinguish it from SSFD, it may be referred to as 'Subband-Wise Full Duplex' or 'Subband non-overlapping Full Duplex'.

[0051] Figures 3 and 4 are diagrams for explaining the comparison between SBFD and SSFD during FD operation in 5G.

[0052] First, SBFD can be considered in FIG. 3 (a) and FIG. 4 (a). Specifically, referring to FIG. 3 (a), the sub-band area of ​​DL and the sub-band area of ​​UL may not overlap each other. In this case, a guard band may exist between the sub-band area of ​​DL and the sub-band area of ​​UL. Alternatively, referring to FIG. 2 (a), SBFD operation may be performed based on the resource pattern of a cell or base station. For example, in the resource pattern, the HD (half-duplex) slot / symbol and the SBFD slot / symbol may be TDMed together.

[0053] Alternatively, examples such as those shown in FIG. 3 (b) and FIG. 4 (b) may be considered for SSFD. Specifically, referring to FIG. 3 (b), the sub-band area of ​​DL and the sub-band area of ​​UL may overlap each other. Alternatively, referring to FIG. 4 (b), SSFD operation may be performed based on the resource pattern of a cell or base station. For example, in the resource pattern, the HD (half-duplex) slot / symbol and the SSFD slot / symbol may be TDMed together.

[0055] These FD operations can be combined with existing half-duplex (HD) operations. For example, in existing half-duplex-based TDD operations, only some time resources may be used for FD operations. On the time resources where FD operations are performed, SBFD or SSFD operations may be performed.

[0056] In the case of the FD operation described above, the FD operation can be performed from both the perspective of the gNB and the perspective of the UE. For example, both the gNB and the UE may simultaneously perform DL / UL transmission and reception using the same or different frequency resources within the same time resource. Alternatively, only the gNB may perform the FD operation (within the same time resource), while the UE may perform the HD operation. The gNB may simultaneously perform DL and UL transmission and reception using the same or different frequency resources within the same time resource, but the UE may only perform DL reception or UL transmission within a specific time resource. In this case, the gNB may perform an FD operation in a manner that performs DL transmission and UL reception for different UEs at the same time point (or within the same time resource).

[0057] As described above, in a situation where a network such as a gNB performs FD operations, whether a UE can perform FD operations may be related to the performance of the UE. In this way, if a UE is aware of and capable of performing the network's FD operations, that UE may be referred to as an 'FD-aware UE'.

[0058] In addition, among the SBFD and SSFD described above, one embodiment of the present invention proposes an FD operation using the SBFD method. The SBFD method supports HDs that do not overlap with each other at the sub-band level, and thus has the advantage of being able to operate flexibly from the perspective of operation of not only UEs aware of SBFD but also legacy UEs unaware of the SBFD situation.

[0060] I. FD Related Settings

[0061] Below, we will explain how to perform communication by setting FD-related symbols (SBFD symbols) against this background.

[0062] FIG. 5 is a diagram illustrating a method for a UE and a network to communicate based on FD-related symbol / subband settings according to an embodiment of the present invention.

[0063] First, the UE (510) can receive TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information from the network (520) (S510).

[0064] According to 5G standards, TDD UL-DL pattern information can be configured statically or semi-statically via System Information Block (SIB) 1 and / or Radio Resource Control (RRC) signals, and can be set in a cell-specific manner and / or a user-specific manner. Such TDD UL-DL pattern information will be described below in relation to Fig. 6.

[0065] Additionally, the UE (510) may receive first FD-related setting information based on the TDD UL-DL pattern information from the network (520) (S520). In this embodiment, it is assumed that the first FD-related setting information is received in a cell-specific manner and may include FD-related symbol setting information and subband setting information.

[0066] 'FD-related symbols / subbands' are assumed to be SBFD symbols / subbands, but may be information regarding terminology changes in 6G and / or other FD-related symbols / subbands related to FIGS. 2 to 4. However, for convenience of explanation, in the following description, they will be simply referred to as SBFD symbols / subbands.

[0068] Compared to dynamic SBFD, this semi-static SBFD method reduces the complexity of network (520, e.g., gNB) implementation and is highly efficient in terms of Cross Link Interference (CLI) processing. However, it may have the disadvantage of not being able to provide flexible support for UL / DL resources based on UL / DL traffic loads.

[0069] Therefore, in order to compensate for the disadvantages of the semi-static SBFD method described above, one embodiment of the present invention proposes the additional operation of a dynamic SBFD method.

[0070] To this end, in one embodiment of the present invention, as shown in FIG. 5, the UE (510) receives second FD-related setting information (S530) that changes one or more first FD-related symbols / subbands according to the first FD-related setting information, following the cell-specific first FD-related setting information (S520).

[0071] The second FD related setting information may be received in a cell-specific manner or in a user-specific manner depending on the embodiment.

[0072] In one embodiment of the present invention, it is assumed that the second SBFD symbol, which is set based on the second FD related setting information (SBFD setting information), is set consecutively on one or more of the DL symbol (D) or variable symbol (F) according to the TDD UL-DL pattern. In addition, in one embodiment of the present invention, it is assumed that the second SBFD subband, which is set based on the second FD related setting information (SBFD setting information), is defined within an active BWP based on setting information for the active BWP (Bandwidth Part).

[0073] Based on these SBFD settings, the UE (510) can communicate with the network (520) (S530).

[0075] FIG. 6 is a diagram illustrating the TDD UL-DL pattern setting according to one embodiment of the present invention.

[0076] Figure 6 shows an example of a TDD UL-DL pattern, where "D" represents a DL slot / symbol, "D / F" represents a DL and variable symbol, "F" represents a variable slot / symbol, "F / U" represents a variable and UL symbol, and "U" represents a UL slot / symbol.

[0077] As described above, this TDD UL-DL pattern information can be configured statically or semi-statically via SIB 1 and / or RRC signals, and can be set in a cell-specific manner and / or a user-specific manner. The top of FIG. 6 illustrates a pattern (610) set via tdd-UL-DL-ConfigurationCommon in a cell-specific manner, the middle of FIG. 6 illustrates an additional pattern (620) set via tdd-UL-DL-ConfigurationDedicated in a user-specific manner, and the bottom of FIG. 6 illustrates the resulting pattern (630) accordingly.

[0078] In addition, TDD UL-DL patterns may be dynamically configured in groups or in a UE-specific manner in the form of slot formats by RRC and DCI (e.g., SFI (Slot Format Indication)).

[0080] FIG. 7 is a diagram illustrating the SBFD symbol setting considering the TDD UL-DL pattern according to one embodiment of the present invention.

[0081] In one embodiment of the present invention, it is assumed that the time-frequency position of the SBFD subband within the TDD carrier can be set in a cell-specific manner for an RRC connected UE. Such cell-specific SBFD symbol configuration information can be determined based on the TDD UL-DL pattern as shown in FIG. 7, and in one embodiment of the present invention, it is proposed that the SBFD symbols can be assigned from the starting symbol of the first D slot to the last F symbol in the F / U slot (710).

[0082] The D / F slot represents a slot structure in which a DL symbol and a variable symbol are arranged as shown in 720 of FIG. 7, and the F / U slot may represent a slot structure in which a variable symbol and a UL symbol are arranged as shown in 730 of FIG. 7.

[0084] FIGS. 8 and 9 are drawings for specifically explaining the concept of an activated BWP according to an embodiment of the present invention.

[0085] In 5G communication systems, the concept of performing UL / DL transmission and reception using a specific BWP is utilized rather than the UE using the entire carrier bandwidth (810). FIG. 8 illustrates an example where three BWPs (820a, 820b, 820c) are configured within the entire carrier bandwidth (810). As described above, up to four BWPs may be configured for a specific UE, but the active BWP utilized by the UE at a specific time may be limited to one of these.

[0086] As shown in Fig. 8, each BWP can be defined by its relationship with a standard resource block (PRB (Physical Resource Block)), and such a standard PRB can be defined as a CRB (Common Resource Block; 830), and in some cases, it may be referred to as Point A.

[0087] Each BWP can be defined by a frequency distance separated from the CRB (830) as described above, and in FIG. 8, the first BWP is a first offset (N) from the CRB (830). start BWP, 0 It starts at a position spaced by ), and the first size (N size BWP, 0 It can be defined as having ), and the second BWP is a second offset (N) from the CRB (830). start BWP, 1 It starts at a position spaced by ), and the second size (N size BWP, 1 It can be defined as having ), and the 3rd BWP is a 3rd offset (N) from the CRB (830). start BWP, 2 It starts at a position spaced by ), and the third size (N size BWP, 2 It can be defined as having ).

[0088] Meanwhile, these BWPs can be configured in various forms, as exemplified in Fig. 9.

[0089] 910 of FIG. 9 illustrates an example in which BWP 1 is defined within the entire bandwidth and BWP 2 is set for a UE communicating through limited energy consumption within BWP 1; 920 of FIG. 9 illustrates an example in which two discontinuous BWPs are set within the entire bandwidth; 930 of FIG. 9 illustrates a case in which bandwidth for another unknown service is utilized between two discontinuous BWPs; and 940 of FIG. 9 illustrates an example in which a BWP for 5G communication is set within the entire bandwidth and another bandwidth is utilized for services not yet defined, such as next-generation communication.

[0091] Based on the above explanation, the SBFD symbol setting method and the subband setting method are distinguished and explained in detail below.

[0093] II. SBFD Symbol Configuration

[0094] Example 1 - Additional SBFD Symbol Assignment

[0095] FIG. 10 is a diagram illustrating a method for assigning additional SBFD symbols according to an embodiment of the present invention.

[0096] As described above in relation to FIG. 5, the present embodiment proposes a method for allocating additional dynamic SBFD symbols per UE in a situation where SBFD symbols are semi-statically allocated by the first FD-related configuration information.

[0097] FIG. 10 illustrates a single cell-specifically configured TDD-UL-DL pattern. If two TDD-UL-DL patterns are configured, two consecutive TDD-UL-DL patterns can be configured and operated.

[0098] In FIG. 10, each cell represents a slot, and is an example in which DL symbol (D), variable symbol (F), and UL symbol (U) slots are set. The D / F slot represents a slot containing a DL symbol and a variable symbol, and the F / U slot represents a slot containing a variable symbol and a UL symbol.

[0099] At this time, it is assumed that symbols A0 and B0 are the start and end symbols for semi-static SBFD symbols set by cell-specific first FD related setting information.

[0100] In one embodiment of the present invention, the second FD-related setting information proposes assigning additional third FD-related symbols (e.g., symbols A1, A2, B1, B2) to the first FD-related symbols, wherein the third FD-related symbols (e.g., symbols A1, A2, B1, B2) are set consecutively with the first FD-related symbols (e.g., symbols A0, B0) to one or more of the DL symbols or variable symbols according to the TDD UL-DL pattern.

[0101] That is, a method is proposed to assign SBFD symbols in a continuous form before and after semi-static SBFD symbols (A0, B0) through symbols A1 and B1. At this time, SBFD communication can be performed within cell-specifically configured DL and UL subbands within semi-static and dynamic SBFD symbols.

[0103] In one embodiment of the present invention, the second FD related setting information may be set to indicate the maximum range of a third FD related symbol in addition to the first FD related symbol in a cell-specific manner.

[0104] In other words, it is possible to operate with a limit on the maximum range that can be set with dynamic SBFD symbols. In the example of FIG. 10, symbols A2 and B2 can be seen as symbols that restrict the maximum number of symbols that can be assigned consecutively before and after semi-static SBFD symbol assignments during dynamic SBFD symbol assignment.

[0105] According to the embodiment, symbols A1 and B1 can be operated in a UE-specific manner. Additionally, symbols A2 and B2 can be operated in a cell-specific manner. Furthermore, the embodiment can also be operated without setting symbols A2 and B2.

[0106] However, for the convenience of explanation, this embodiment is described based on the case where symbols A2 and B2 are set and operated in a cell-specific manner.

[0107] Symbols A2 and B2 can be set to a higher layer signaling such as RRC, or to one or more combinations of low layer signaling such as MAC (Medium Access Control)-CE (Control Element) and DCI (Downlink Control Information).

[0108] One or a combination of DCI or MAC-CE indicates the location of symbols A1 and B1, and the UE can perform SBFD operations on dynamically set SBFD symbols.

[0110] In one embodiment of the present invention, we will specifically examine the case where the second FD-related setting information is received through DCI.

[0111] DCI can be defined in a new format, or an existing format can be modified and used. When using an existing format, instructions can be given using a DCI that does not include scheduling information.

[0112] As an example, dynamic SBFD symbol allocation can be performed using DCI 2_0, a non-scheduling DCI.

[0113] Configuration information for dynamic SBFD symbol allocation can be configured for the UE through upper-layer signaling such as RRC, and then additionally allocated dynamic SBFD symbols can be allocated based on the configuration information for dynamic SBFD symbol allocation configured through upper-layer signaling via DCI 2_0 scrambled with SFI-RNTI.

[0114] In the operation described above, DCI 2_0 may be operated to define a new RNTI such as SBFD-RNTI rather than SFI-RNTI, and to indicate that the DCI format is a DCI for dynamic SBFD symbol allocation.

[0115] The upper layer signaling described above may also indicate the configuration and size of the DCI field for dynamic SBFD symbol indication in addition to configuration information for dynamic SBFD symbol allocation.

[0116] In addition, the aforementioned upper layer signaling may include information regarding the corresponding symbols when operating for symbols A2 and B2.

[0118] Specifically, as an example of the configuration of upper-layer signaling setting information and DCI instruction information for this method, the upper-layer signaling can be operated by including information on the maximum number of SBFD symbols that can be additionally allocated to the front and back parts of the corresponding area based on semi-static SBFD symbol settings. Based on this number, the field size of the DCI can be configured. The maximum number of SBFD symbols may refer to information regarding symbols A2 and B2.

[0119] For example, if configured to add up to 1 symbol to the front and up to 1 symbol to the back, at least 1 bit is required to indicate the number of symbols added to the front, and at least 1 bit may be required to indicate the number of symbols added to the back. Therefore, the field for dynamic SBFD symbol indication in DCI can be set to 2 bits and operated as follows.

[0120] Bit field for SBFD symbol indication Number of SBFD symbols added to the front area Number of SBFD symbols added to the back area 00 0 0 01 1 0 10 0 1 11 1 1

[0121] The maximum number of additional SBFD symbols that can be allocated to the front and back parts can be set to a larger value, and the number of symbols that can be added to the front and back parts can also be set differently. Accordingly, the DCI field size can be determined.

[0123] In addition to the embodiments according to the above method, it can be operated to indicate the number of dynamic SBFD symbols or the location of symbols that are additionally set through the DCI bit field in various ways.

[0124] For example, instructional operation in the form of a bitmap is possible. Through upper-layer signaling, two bitmaps can be configured based on semi-static SBFD symbol configuration, taking into account the maximum number of additional SBFD symbols that can be allocated to the front and back parts of the corresponding area. That is, the bitmap size configuration can represent information regarding symbols A2 and B2. In this case, one bitmap for the SBFD symbols added to the front part and one bitmap for the SBFD symbols added to the back part can be defined. The two bitmaps can be configured as a single bitmap in a contiguous form.

[0125] It is configured with two bitmaps, and if each bitmap is 2 bits, up to two SBFD symbols can be added to the front and back. In this case, if the bitmap is (0,1) and (1, 0), it can indicate that one additional SBFD symbol is allocated to the front and back. If configured with a single bitmap, it can be set to (0, 1, 1, 0).

[0126] Although the above-described embodiment specifically explained the setting through DCI, the SBFD symbol indication method using MAC-CE can also be operated by applying this method.

[0128] In this embodiment, dynamic SBFD configuration and operational information indicated by DCI or MAC-CE or a combination thereof may be applied and valid at that time in the following manner.

[0129] Dynamic SBFD symbols indicated by DCI or MAC-CE may be valid from a point in time after a predetermined offset period based on the symbol or slot that received the indication information. The time offset may be a value equal to or greater than 0, and the unit may be a symbol or a slot.

[0130] Alternatively, dynamic SBFD symbols indicated by DCI or MAC-CE may be valid from a TDD-UL-DL pattern cycle that begins after the TDD-UL-DL pattern cycle containing the symbol or slot that received the indication information.

[0131] In contrast, the configured dynamic SBFD symbols may be operated to be valid only within the TDD-UL-DL pattern period that includes the above valid time. Alternatively, they may be operated to be valid for a period corresponding to N times the TDD-UL-DL pattern period.

[0132] The value of the above validity period setting can be set and operated by upper-level signaling such as RRC. Alternatively, it can be operated by being included within a DCI or MAC-CE containing instruction information for dynamic SBFD symbols.

[0134] In addition, when setting information for symbols A1, A2, B1, and B2 in this embodiment, various methods as follows may be applied and indicated.

[0135] This explanation is based on symbols A1 and A2, and the same applies to symbols B1 and B2.

[0136] The setting of information for symbols A1 and A2 can be indicated using symbol offset or slot offset values ​​based on symbol A0. (That is, in the specific example description of Embodiment 1, the indication information can be configured based on the symbol offset, i.e., the number of symbols available via SBFD.)

[0137] Alternatively, symbol A2 is set to the slot containing the symbol and the position of the symbol within that slot, and symbol A1 can be indicated by a position relative to symbol A2 using a symbol offset or slot offset value.

[0138] Alternatively, both symbols A1 and A2 can be set to the slot where the symbol is located and the position of the symbol within that slot.

[0140] Example 2 - Disabling and Dynamic Allocation

[0141] FIG. 11 is a diagram illustrating a method of deactivating a first FD-related symbol and performing dynamic allocation according to an embodiment of the present invention.

[0142] That is, in one embodiment of the present invention, a method is proposed to operate a plurality of consecutive or discontinuous symbols among semi-statically configured SBFD symbols as dynamic SBFD. This can be viewed as an embodiment in which only dynamic SBFD symbols are used in SBFD operation. At this time, it is assumed that SBFD communication is performed within cell-specifically configured DL and UL subbands within the configured SBFD symbols.

[0143] FIG. 11 is also an example of a single TDD-UL-DL pattern configured specifically by the cell. When two patterns are configured, two consecutive patterns can be configured and operated. In FIG. 11, symbols A and B represent the start and end symbols for a semi-static SBFD symbol configured specifically by the first FD-related configuration.

[0145] To disable semi-statically configured SBFD symbols and to configure dynamic SBFD symbols in the area, the network (gNB or TRP) may issue a instruction to the UE to disable semi-static SBFD symbols as second FD-related configuration information.

[0146] The above instruction information can be operated by including enable or disable instructions within a higher-level signaling, such as an RRC, which includes semi-static SBFD symbol setting information.

[0147] Alternatively, instructions can be given through separate signaling, distinct from the semi-static SBFD symbol setting instructions. Instructions can be given using one or more combinations of upper-level signaling, such as RRC, or lower-level signaling, such as MAC-CE / DCI.

[0149] The above instruction information can be operated so that symbols configured semi-statically are disabled starting from a specific time offset based on the symbols received by the UE. The time offset can be in units of symbols or slots, and can be a value of 0.

[0150] Symbols configured semi-statically can be disabled starting from a specific time offset based on the slot at which the above instruction information is received by the UE. The time offset can be in units of symbols or slots, and can be a value of 0.

[0151] Based on the TDD-UL-DL pattern period at which the above instruction information is received by the UE, symbols configured semi-statically after a specific time offset can be operated to be disabled. The time offset may be in units of the TDD-UL-DL pattern period and may be a value of 0.

[0153] In one embodiment of the present invention, in order to disable semi-statically configured SBFD symbols through the second FD-related configuration information as described above and to perform dynamic SBFD symbol configuration in the area, the network (gNB or TRP) may issue a dynamic SBFD symbol configuration instruction to the UE as the third FD-related configuration information.

[0154] However, the above instruction information included in the third FD related configuration information may be operated by being included in a signaling that includes semi-static SBFD symbol disable instruction information in the second FD related configuration information.

[0155] Alternatively, instructions may be given through separate signaling distinct from the semi-static SBFD symbol disable instruction. Instructions can be given using one or more combinations of upper-layer signaling such as RRC or lower-layer signaling such as MAC-CE / DCI.

[0157] In this embodiment, the deactivation of a semi-statically configured SBFD symbol (deactivation by the second FD related configuration information) can be operated as an operation distinct from the release of the RRC for the semi-statically configured SBFD configuration information.

[0158] In the case of an SBFD-aware UE, if the information configured by the SBFD-related RRC is released, legacy UE behavior can be performed by the new RRC configuration. In this case, all semi-static SBFD configuration information is lost. Therefore, in such a situation, dynamic SBFD symbol configuration based on the existing semi-statically configured SBFD symbols may not be possible.

[0159] Accordingly, in this embodiment, the 'second FD-related setting' suggests that the deactivation of semi-statically configured SBFD symbols is not the release of SBFD-related RRC, but rather the deactivation of the configured symbols. Therefore, if there is no additional setting for SBFD usage, legacy UE operations can be performed in a deactivated state.

[0161] FIG. 12 is a diagram illustrating an example of signaling between a UE and a network according to the embodiment of FIG. 11.

[0162] In FIG. 12, the network may transmit second FD-related configuration information to disable semi-statically configured SBFD symbols (S1210). After such disablement, the UE may be operated to perform legacy operations (i.e., non-FD related operations) either in the entire symbol area or only in the non-SBFD symbol area (S1220).

[0163] Subsequently, the UE can receive third FD related configuration information regarding configuration or instruction for dynamic symbols from the network (S1230), and subsequently, the UE can operate to perform SBFD operations (S1240) in the dynamically configured / instructed SBFD symbol interval.

[0164] After the dynamic SBFD operation is completed, the UE can operate to perform legacy operations (S1250) in the entire symbol area or only in the non-SBFD symbol area.

[0165] Afterwards, the UE can additionally receive activation information for semi-statically configured SBFD symbols from the network (S1260), and then the UE can operate to perform SBFD operations (S1270) in the SBFD symbol interval.

[0166] The activation instruction may be in the same form as the deactivation instruction in this embodiment (setting information related to the second FD). That is, it is possible to instruct using one or more combinations of RRC, MAC-CE, and DCI.

[0168] In this embodiment, dynamic SBFD symbol setting and operation information indicated by DCI or MAC-CE or a combination thereof may be applied and valid at that time in the following manner.

[0169] Dynamic SBFD symbols indicated by DCI or MAC-CE may be valid from a specific time offset after the symbol or slot that received the indication information. The time offset may be equal to or greater than 0, and the unit may be a symbol or a slot.

[0170] Alternatively, dynamic SBFD symbols indicated by DCI or MAC-CE may be valid from a TDD-UL-DL pattern cycle that begins after the TDD-UL-DL pattern cycle containing the symbol or slot that received the indication information.

[0171] Additionally, the configured dynamic SBFD symbols may be operated to be valid only within the TDD-UL-DL pattern period that includes the above-mentioned valid time. Alternatively, they may be operated to be valid for a period corresponding to N times the TDD-UL-DL pattern period.

[0172] The value of the above validity period setting can be set and operated by upper-level signaling such as RRC. Alternatively, it can be operated by being included within a DCI or MAC-CE containing instruction information for dynamic SBFD symbols.

[0174] Meanwhile, the dynamic SBFD symbol indication method is described in detail as follows.

[0175] The start / end symbol of a dynamic SBFD symbol range can be indicated by the slot to which it belongs and the index value within that slot.

[0176] Specifically, the start / end symbols of the dynamic SBFD symbol interval can be indicated through a time offset in symbol units based on symbol A of FIG. 11.

[0177] The start symbol of the dynamic SBFD symbol interval can be indicated by a time offset in units of symbols based on symbol A, and the end symbol of the dynamic SBFD symbol interval can be indicated by a time offset in units of symbols based on the length of the dynamic SBFD symbol interval or the start symbol of the dynamic SBFD symbol interval.

[0178] One or more of the above dynamic SBFD symbol intervals may be indicated between symbol A and symbol B intervals.

[0179] Meanwhile, dynamic SBFD symbol intervals can be indicated by a combination of the above methods according to the embodiments. When multiple dynamic SBFD symbol intervals are set, starting from the second dynamic SBFD symbol interval, the corresponding interval may be indicated based on the first dynamic SBFD symbol interval.

[0181] The setting of the above dynamic SBFD symbol intervals can be indicated by one or more combinations of MAC-CE and DCI.

[0182] Some information may be pre-set by upper-level signaling, such as RRC, to instruct the lower-level signaling method described above. For example, this may include the setting of the number of configurable dynamic SBFD symbol intervals, the setting of the interval of time offset values, or the minimum or maximum value thereof.

[0184] FIGS. 13 and FIGS. 14 are drawings for illustrating a method of indicating a dynamic SBFD symbol according to embodiments of the present invention.

[0185] As illustrated in FIGS. 13 and 14, for dynamic indication of a dynamic SBFD symbol interval, the interval between symbol A and symbol B can be divided into multiple regions in advance, and the SBFD symbol interval can be indicated by indicating one or more regions.

[0186] FIG. 13 is an example of operation divided into four regions from symbol A to B, and one or more of the four regions can be designated as dynamic SBFD symbol intervals. Configuration information for these multiple regions can be pre-configured to the UE via RRC or MAC-CE.

[0187] In addition, configuration information for the multiple areas can be configured and operated in a cell-specific form. Also, configuration information for the areas can be included in semi-static SBFD configuration information and operated together.

[0188] Although FIG. 13 is a configuration in which multiple regions do not overlap each other, for the allocation of variable regions, multiple regions that overlap each other may be configured and operated as in FIG. 14.

[0189] In this case, it is expected that multiple regions indicated by dynamic SBFD symbol regions will not overlap. Alternatively, if they do overlap, the two regions may be interpreted as indicating a single region and operated accordingly.

[0190] One or more of the multiple regions set as shown in FIGS. 13 and 14 can be dynamically directed to the UE using MAC-CE or DCI.

[0192] Example 3

[0193] As a method of allocating and operating SBFD symbols within a range that does not overlap with semi-static SBFD symbol allocation locations, the method of Example 2 may be applied in a modified form.

[0194] In particular, symbols A and B can be set and operated as start and end symbols for a dynamic SBFD symbol configurable range that does not overlap with semi-static allocation locations. However, in this case, the disable instruction for the semi-statically configured SBFD symbols can be operated separately from the configuration for the dynamic SBFD symbols.

[0196] Example 4

[0197] As a method of allocating and operating dynamic SBFD symbols within the entire TDD UL / DL pattern cycle, the method of Example 2 can be applied. In particular, symbols A and B can be set and operated as the start and end symbols of the TDD UL / DL pattern cycle. However, in this case, in addition to the deactivation instruction for semi-statically configured SBFD symbols, it can also be operated based on the release of the RRC setting for semi-statically configured SBFD symbols.

[0199] III. SBFD Subband Configuration

[0200] Below, a method of utilizing a first subband that is semi-statically configured based on the first FD-related configuration information by changing it according to the second FD-related configuration information is explained in detail.

[0201] That is, the following embodiments relate to dynamic / semi-static UL and DL subband allocation and operation methods in a semi-statically configured SBFD symbol area, and propose a method for allocating additional DL and UL subbands in addition to cell-specifically configured DL and UL subbands.

[0202] In this embodiment as well, assuming a symbol configuration as shown in FIG. 11, Symbol A and Symbol B of FIG. 11 assume operation in a subband of a semi-static SBFD symbol that is cell-specifically set based on TDD UL-DL pattern setting information between them.

[0203] Unless specifically stated otherwise in the embodiments, it is assumed that the second FD-related subband based on the second FD-related setting information corresponds to one or more of the uplink subbands or downlink subbands that are consecutive to the first FD-related subband.

[0205] Example 1 - Additional Subband Allocation

[0206] FIGS. 15 and 16 are drawings for explaining a method of allocating additional subbands based on second FD related setting information according to an embodiment of the present invention.

[0207] Specifically, FIG. 15 shows an example in which, in an area where semi-statically configured SBFD symbols are allocated, one DL subband and one UL subband are allocated, frequency resources are allocated in a continuous form to the existing DL and UL subbands when an additional UL subband or DL ​​subband is allocated, thereby expanding the frequency bands of the UL and DL subbands.

[0208] In the example of Fig. 15, the existing subband is expanded both upward and downward along the frequency axis, but various expansion methods are possible, such as expanding in only one direction or expanding in both directions with different sizes of frequency resources expanded upward or downward.

[0210] In this embodiment, additional frequency resource information that can be expanded based on existing UL and DL subbands that are specifically allocated to the cell is set, and the information can be set as follows.

[0211] First, an additional frequency resource area can be set by determining the number of additionally allocable PRBs based on the location of the starting PRB (Physical Resource Block) or the ending PRB of the UL and DL subbands configured during the existing semi-static SBFD symbol allocation. Alternatively, an area where additional frequency resources can be allocated can be set by indicating the indices of the starting and ending PRBs of the subband to be expanded, that is, the PRBs located at the boundary of the subband to be expanded. Alternatively, various methods can be indicated by variations or combinations of the above methods.

[0212] In addition, if the start or end PRB of the expanding subband is fixed and expanded in only one direction, an area where additional frequency resources can be allocated can be set with only a single PRB index indication.

[0213] When the network (gNB) sets information for cell-specific UL and DL subbands (e.g., when transmitting setting information related to the first FD), it may also set information for the expandable frequency range as described above for each subband. Alternatively, it may change based on the setting information above using a separate signaling (e.g., setting information related to the second FD). The instructions for the setting information may be set using one or more combinations of upper-layer signaling such as RRC or lower-layer signaling such as MAC-CE / DCI.

[0214] At this time, the setting information for changing the subband (setting information related to the second FD) may correspond to the form of a combination of information regarding an additional uplink subband consecutive to the first FD-related subband and information regarding an additional downlink subband consecutive to the first FD-related subband.

[0215] Based on the configuration information for the aforementioned frequency expansion range, operation in the following manner is possible.

[0216] Method #1: RRC-based operation method

[0217] In the case where the above configuration information is signaled via RRC, the SBFD-aware UE (hereinafter, UE) can use additional frequency resources based on the configuration information. The RRC can be operated in a cell-specific or UE-specific form.

[0218] Reception of RRC configuration information means that the additional allocation of the corresponding frequency resources is immediately activated, and the operation method may be semi-static.

[0219] The above setting information may be valid from a point in time after a specific time offset based on the symbol or slot that received the setting information. The time offset may be a value equal to or greater than 0, and the unit may be a symbol or a slot.

[0220] Alternatively, the above-mentioned configuration information may be valid from a TDD-UL-DL pattern cycle that begins after the TDD-UL-DL pattern cycle containing the symbol or slot that received the above-mentioned configuration information. Alternatively, when setting semi-static SBFD symbols, it may be operated to be valid for a period equal to the validity period of the cell-specifically pre-configured DL and UL subbands.

[0221] Additionally, the above-mentioned setting information may be operated to be valid only within the TDD-UL-DL pattern period containing the received symbol or slot. Alternatively, it may be operated to be valid for a period corresponding to N times the TDD-UL-DL pattern period. The setting for the validity period may be set and operated by a higher-level signaling such as RRC, and the RRC signaling may be an RRC signaling that includes setting information for a frequency-extendable range.

[0223] Method #2: RRC and lower-layer signaling-based operation method

[0224] In this embodiment, based on the subband extension information of the UL and DL set by the RRC, the network (gNB) can instruct the UE to extend the subband. That is, activation can be performed using one or more combinations of MAC-CE and DCI. The RRC can be operated in a cell-specific or UE-specific form.

[0225] When activated, it may direct the extension of one or more specific subbands among the UL or DL ​​subbands.

[0226] With an extended instruction method, it is possible to instruct the activation or deactivation of the entire subband expandable area set by RRC. That is, it indicates an on / off type instruction, and can be indicated through a 1-bit field.

[0227] Alternatively, based on Fig. 15, activation of one or more subband sections may be indicated based on setting information such as [Table 2] below.

[0228] bit field within DCI or MAC-CE additionally activated sub-band 00 UL sub-band 01 DL sub-band 10 UL and DL sub-band 11 reserved

[0229] Meanwhile, in one embodiment of the present invention, the second FD-related setting information may include one or more of the first information indicating an extension level of the uplink subband among the first FD-related subbands, or the second information indicating an extension level of the downlink subband among the first FD-related subbands.

[0230] That is, in FIG. 15 and [Table 2], the area of ​​the section for additional expansion for each DL and UL in the semi-statically configured SBFD symbol section is set as a single expansion level, but to increase resource efficiency, the expansion level of each UL or DL ​​subband can be set and indicated as multiple as in FIG. 16.

[0231] Figure 16 is an example in which the extension levels for each DL and UL subband are configured with two, but the UL and DL may have different numbers of extension levels, and the size of each extension level may be configured and set to be the same or different sizes for operation.

[0233] Based on Fig. 16, activation of one or more subband sections may be indicated based on setting information such as Tables 3 and 4 below.

[0234] bit field within DCI or MAC-CE additionally activated sub-band 00 Maintain existing UL sub-band 01 UL sub-band extension level 1 10 UL sub-band extended level 2 11 reserved

[0235] bit field within DCI or MAC-CE additionally activated sub-band 00 Maintain existing DL sub-band 01 DL sub-band extension level 1 10 DL sub-band extension level 2 11 reserved

[0236] Table 3 can be viewed as a configuration table for extension instructions for UL subbands, and Table 4 as a configuration table for extension instructions for DL ​​subbands. Each configuration can be operated individually, and extension instructions for each UL and DL subband can be defined and used in a separate bit field within DCI or MAC-CE.

[0237] Alternatively, nine combinations of UL and DL subband instructions in Tables 3 and 4 can be set up as a single table, and instructions for that combination can be indicated through a 4-bit field and a single-bit field.

[0238] The above-described instruction information may be valid from a point in time after a specific time offset based on the symbol or slot that received the information. The time offset may be a value equal to or greater than 0, and the unit may be a symbol or a slot.

[0239] Alternatively, it may be valid from a TDD-UL-DL pattern cycle that begins after a TDD-UL-DL pattern cycle containing a symbol or slot that received the above instruction information.

[0240] Alternatively, when setting semi-static SBFD symbols, the cell can be operated to be valid for a period equal to the validity period of the pre-set DL and UL subbands.

[0241] It may be operated to be valid only within the TDD-UL-DL pattern period containing the symbol or slot that received the above instruction information. Alternatively, it may be operated to be valid for a period corresponding to N times the TDD-UL-DL pattern period. The setting for the validity period may be configured and operated by a higher-level signaling such as RRC, and the RRC signaling may be an RRC signaling that includes setting information for a frequency-extendable range. Alternatively, it may be operated by being included within a DCI or MAC-CE containing the above instruction information.

[0243] Meanwhile, in Method 1 and Method 2, the network (gNB) can define the frequency usage rate, frequency band congestion rate, amount of interference in the frequency band, and traffic load in the frequency band for the subband to determine the additional subband allocation, and can operate to allocate additional frequency resources when the defined metric value becomes higher or lower than a specific threshold.

[0244] For the calculation of the above metrics, the network (gNB) may direct the measurement and reporting of RSSI and RSRP for specific RS in a specific resource area. Alternatively, it may direct the measurement and reporting of RSSI without directing the reception of specific RS in a specific resource area. The network (gNB) may use the corresponding values ​​reported by the UE for the calculation of the above metrics.

[0245] For the calculation of the above metrics, the network (gNB) may include the ratio of PUCCH (Physical Uplink Control Channel) SR (Scheduling Request) and HARQ NACK generated by the UE in the calculation of the above metric values.

[0247] When the above information is collected per UE and made into a metric, the network (gNB) can signal RRC configuration or instruction information regarding the frequency expandable area specifically to a specific UE or group of UEs based on that information.

[0248] In the case of configuration or instruction at the UE group level, if specific UEs are sufficiently separated from each other geographically, a group consisting of those UEs can be created, and the same frequency extension range can be configured and directed. As a result, UEs sharing the same temporal frequency usage resources can be physically separated from each other to minimize potential interference between UEs.

[0249] In the case of the above group-based settings and instructions, a group ID for identifying the corresponding group may be explicitly or implicitly included in the setting or instruction information for operation.

[0251] Meanwhile, in one embodiment of the present invention, a UE-initiated subband allocation mechanism is proposed.

[0252] The UE may transmit a scheduling request for UL or DL ​​subband expansion using PUCCH. Upon receiving the above PUCCH, the network (gNB) may instruct the UE to expand the subband using Method #1, Method #2, or a variation or combination thereof. The operation method for the expanded subband (such as the application time and validity period) may be operated using Method #1, Method #2, or a variation or combination thereof.

[0253] In the above operation, the PUCCH transmitted by the UE may include information requesting the extension of a specific subband. For example, based on FIGS. 15 and 16, it may direct the extension for one or both of the DL or UL subbands and may include a request for a specific extension level for the said subband.

[0255] (PUCCH Operation Method #1) The network (gNB) defines a new RRC parameter (e.g., SBFD-PUCCHResourceConfig) and can configure periodic or semi-static PUCCH resources through the said RRC parameter. The said RRC parameter assumes a separate resource configuration message different from the PUCCH resource configuration used for SR. Since the said PUCCH resource is a PUCCH resource dedicated to subband expansion requests for SBFD, when a UL resource request is made through the said PUCCH, the network (gNB) recognizes that it is a subband expansion request and can configure and direct subband expansion within the subband expansion possible area based on the request information.

[0256] (PUCCH Operation Method #2) Among the SchedulingRequestIds used when performing SR using the existing PUCCH, a dedicated SchedulingRequestId dedicated to subband extension requests for SBFD can be defined and set for the UE. When the UE performs SR through the PUCCH resource associated with the dedicated SchedulingRequestId, the network (gNB) recognizes that it is a subband extension request for SBFD and can set and instruct subband extension within the subband extension possible area based on the request information.

[0258] Example 2 - Candidate Subband Based

[0259] FIGS. 17 and 18 are drawings illustrating a method for allocating dynamic SBFD subbands based on candidate subbands according to an embodiment of the present invention.

[0260] Specifically, FIG. 17 illustrates an example of setting and operating candidate UL and DL subbands to allocate additional UL subbands or DL ​​subbands in an example where one DL and one UL subband are allocated in an area where semi-statically configured SBFD symbols are allocated.

[0261] In the example of Fig. 17, one UL and one DL subband are set as candidate subbands, but it can be configured so that only one of the UL or DL ​​candidate subbands exists, and each candidate UL and DL subband can have two or more. In addition, the size of each subband can be set to various sizes and operated.

[0263] In this embodiment, additional allocatable subband resource information is set in addition to the existing UL and DL subbands that are cell-specifically allocated, and the information can be set as follows.

[0264] When assigning existing semi-static SBFD symbols, the frequency position and magnitude of each additionally assignable subband can be set based on the position of the starting PRB or the ending PRB of the configured UL and DL subbands. For example, the starting PRB index of the subband can be indicated by the offset value to the starting PRB of the additionally assignable subband based on the position of the starting PRB or the ending PRB of the UL and DL subbands, and the ending PRB index of the subband can be indicated by setting the number of PRBs used in the subband.

[0265] Alternatively, additional subband resource information can be set by directly specifying the indices of the start and end PRBs of the subband to be added.

[0266] Alternatively, various methods of instruction are possible through variations or combinations of the above methods.

[0268] When the network (gNB) configures information for cell-specific UL and DL subbands (i.e., configured based on the configuration information related to the first FD), it may also configure information for additional subbands as described above for each subband. Alternatively, it may configure based on the configuration information above using a separate signaling (e.g., configuration information related to the second FD). The instructions for the configuration information may be configured using one or more combinations of upper-layer signaling such as RRC or lower-layer signaling such as MAC-CE / DCI.

[0270] Based on the configuration information for the additional subbands mentioned above, operation can be performed in the following manner.

[0272] Method #3: RRC-based operation method

[0273] In the case where the above configuration information is signaled via RRC, the SBFD-aware UE (hereinafter, UE) can use additional subbands allocated based on the configuration information. The RRC can be operated in a cell-specific or UE-specific form.

[0274] Reception of RRC configuration information means that the additional allocation of the corresponding frequency resources is immediately activated, and the operation method can be semi-static.

[0275] In addition, the above setting information may be valid from a point in time after a specific time offset based on the symbol or slot that received the information. The time offset may be a value equal to or greater than 0, and the unit may be a symbol or a slot.

[0276] Alternatively, it may be valid from the TDD-UL-DL pattern cycle that begins after the TDD-UL-DL pattern cycle containing the symbol or slot that received the above setting information. Alternatively, when setting semi-static SBFD symbols, it may be operated to be valid for a period equal to the validity period of the cell-specifically pre-set DL and UL subbands.

[0277] Alternatively, it may be operated to be valid only within the TDD-UL-DL pattern period containing the symbol or slot that received the above-mentioned setting information. Alternatively, it may be operated to be valid for a period corresponding to N times the TDD-UL-DL pattern period. The setting for the validity period may be set and operated by a higher-level signaling such as RRC, and the RRC signaling may be an RRC signaling that includes setting information for a frequency-extendable range.

[0279] Method #4: RRC and lower-layer signaling-based operation method

[0280] In this embodiment, based on the subband configuration information of additional ULs and DLs set by the RRC, the network (gNB) can instruct the UE to allocate additional subbands. That is, activation can be performed using one or more combinations of MAC-CE and DCI. The RRC can be operated in a cell-specific or UE-specific form.

[0281] When activated, one or more specific subbands among the UL or DL ​​subbands can be added.

[0282] With an extended instruction method, it is possible to instruct the activation or deactivation of all additional assignable subbands configured by RRC. That is, it indicates an on / off type instruction, and can be indicated through a 1-bit field.

[0283] Alternatively, based on Fig. 17, the activation of one or more additional subbands may be indicated based on the setting information in Table 5 below.

[0284] bit field within DCI or MAC-CE additionally activated sub-band 00 UL sub-band 01 DL sub-band 10 UL and DL sub-band 11 reserved

[0285] In Figure 17 and Table 5, additional subbands for each DL and UL in a semi-statically configured SBFD symbol interval are set to one size, but to increase resource efficiency, the size of each additional UL or DL ​​subband can be expanded when allocated as shown in Figure 18.

[0286] In FIG. 18, DL and UL subband #2 represents a subband having a wider frequency resource size than DL and UL subband #1. Additionally, FIG. 18 is an example where each DL and UL subband is configured with one extension level, but UL and DL may have different numbers of extension levels, and the sizes of each extension level may be configured and set to be the same or different sizes for operation.

[0288] Based on Fig. 18, one or more subbands can be assigned or activated based on the setting information in Tables 6 and 7 below.

[0289] bit field within DCI or MAC-CE Instruction / Setting Information 00 Maintain semi-static configured UL sub-band 01 UL sub-band #1 added 10 UL sub-band #2 added 11 reserved

[0290] bit field within DCI or MAC-CE additionally activated sub-band 00 Maintain semi-static configured DL sub-band 01 Add DL sub-band #1 10 DL sub-band #2 added 11 reserved

[0291] [Table 6] is a configuration table for additional allocation to UL subbands, and [Table 7] is a configuration table for additional allocation to DL subbands. Each configuration is operated individually, and extension instructions for each UL and DL subband can be defined and used in a separate bit field within DCI or MAC-CE.

[0292] Alternatively, nine combinations of UL and DL subband instructions in Tables 6 and 7 can be set up as a single table, and instructions for that combination can be indicated through a 4-bit field and a single-bit field.

[0294] The above instruction information may be valid from a specific time offset after the received symbol or slot. The time offset may be equal to or greater than 0, and the unit may be a symbol or a slot.

[0295] Alternatively, it may be valid from the TDD-UL-DL pattern cycle that begins after the TDD-UL-DL pattern cycle containing the symbol or slot that received the above instruction information. Alternatively, when setting semi-static SBFD symbols, it may be operated to be valid for a period equal to the validity period of the cell-specifically pre-set DL and UL subbands.

[0296] Additionally, it may be operated to be valid only within the TDD-UL-DL pattern period containing the symbol or slot that received the above instruction information. Alternatively, it may be operated to be valid for a period corresponding to N times the TDD-UL-DL pattern period. The setting for the validity period may be configured and operated by a higher-level signaling such as RRC, and the RRC signaling may be an RRC signaling that includes setting information for a frequency-extendable range. Alternatively, it may be operated by being included within a DCI or MAC-CE containing the above instruction information.

[0298] In methods #3 and #4, the network (gNB) can define frequency usage rates, frequency band congestion rates, amount of interference in the frequency band, and traffic load in the frequency band for the subband to determine additional subband allocation, and can operate to allocate additional frequency resources when the defined metric values ​​become higher or lower than a specific threshold.

[0299] For the calculation of the above metrics, the network (gNB) may direct the measurement and reporting of RSSI and RSRP for specific RS in a specific resource area. Alternatively, it may direct the measurement and reporting of RSSI without directing the reception of specific RS in a specific resource area. The network (gNB) may use the corresponding values ​​reported by the UE for the calculation of the above metrics.

[0300] For the calculation of the above metrics, the network (gNB) may include the PUCCH SR ratio and HARQ NACK ratio generated by the UE in the calculation of the above metric values.

[0301] When the above information is collected per UE and converted into a metric, the network (gNB) can signal RRC configuration or instruction information regarding the frequency expansion range specifically to a specific UE or group of UEs based on that information.

[0302] In the case of configuration or instruction at the UE group level, if specific terminals are sufficiently separated from each other geographically, a group consisting of those UEs can be created, and the same frequency extension range can be configured and instructed. As a result, UEs sharing the same temporal frequency usage resources can be physically separated from each other to minimize potential interference between UEs.

[0303] In the case of the above group-based settings and instructions, a group ID for identifying the group may be explicitly or implicitly included in the setting or instruction information for operation.

[0305] The UE-led subband allocation mechanism described above may also be used for these embodiments.

[0306] Embodiments of the present invention may be applied and operated in combination with cases where, in addition to cases where semi-static SBFD symbols are set, subbands are added or expanded in addition to the UL and DL subbands set in the corresponding symbol when dynamic SBFD symbols are set.

[0307] In addition, it is desirable that additional or expanded subbands are also defined within the active Bandwidth Part (BWP) based on configuration information regarding the active BWP from the network.

[0309] FIG. 19 illustrates a wireless device that can be applied to the present technology.

[0310] Referring to FIG. 19, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, the first wireless device (100) and the second wireless device (200) can correspond to the UE (510) and network (520) of FIG. 5, respectively.

[0311] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or flowcharts of operation disclosed in this document. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). Memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (102) and memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE E-UTRA, 5G NR). A transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be combined with an RF (Radio Frequency) unit. In the present invention, the wireless device may refer to a communication modem / circuit / chip.

[0312] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or operation sequences disclosed in this document. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE E-UTRA, 5G NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be used in combination with an RF unit. In the present invention, the wireless device may refer to a communication modem / circuit / chip.

[0313] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate a signal (e.g., baseband signal) containing a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document.

[0314] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be contained in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0315] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0316] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this document from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and receive wireless signals. For example, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document through one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0318] The detailed description of the preferred embodiments of the present invention disclosed above is provided to enable those skilled in the art to implement and practice the present invention. Although the present invention has been described with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the scope of the invention. For example, those skilled in the art may utilize each configuration described in the above embodiments in a manner that combines with one another.

[0319] Accordingly, the present invention is not intended to be limited to the embodiments shown herein, but to be given the broadest scope consistent with the principles and novel features disclosed herein. Industrial applicability

[0320] The method and apparatus for a UE to set SBFD-related symbols / subbands and to communicate with a network based thereon according to the embodiments of the present invention described above are suitable for use in the SBFD-related communication environment of a 5G system under 3GPP, but can also be used in the same way in 6G and subsequent next-generation mobile communication systems under 3GPP.

Claims

Claim 1 A communication method of a user device (UE) in a mobile communication system for communicating with a network, comprising: receiving TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information from the network; receiving cell-specific first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information that changes one or more first FD related symbols according to the cell-specific first FD related setting information; and communicating with the network according to the second FD related setting information. Claim 2 A communication method of a UE according to claim 1, wherein the second FD related setting information assigns an additional third FD related symbol to the first FD related symbol, and the third FD related symbol is set consecutively with the first FD related symbol to one or more of the DL symbol or variable symbol according to the TDD UL-DL pattern. Claim 3 In claim 1, the communication method of the UE, wherein the second FD related setting information indicates the maximum range of a third FD related symbol in addition to the first FD related symbol in a cell-specific manner. Claim 4 In claim 3, a communication method of the UE, wherein one or more of the third FD related symbols are based on third FD related configuration information represented in a UE-specific manner. Claim 5 In claim 1, the communication method of the UE, wherein the second FD-related setting information is received through SFI (Slot Format Indication) - RNTI (Radio Network Temporary Identifier) ​​or DCI (Downlink Control Information) scrambled by FD-related - RNTI. Claim 6 A communication method of a UE according to claim 5, wherein the DCI has a bitmap format representing the number of third FD-related symbols additionally allocated prior to the first FD-related symbol, and the number of third FD-related symbols additionally allocated following the first FD-related symbol, in the form of a combination. Claim 7 A communication method of a UE according to claim 1, wherein the first FD-related symbol is continuously set to one or more of the DL symbol or variable symbol according to the TDD UL-DL pattern, and the second FD-related setting information disables one or more of the first FD-related symbols. Claim 8 A communication method of a UE according to claim 7, further comprising receiving dynamic third FD related setting information that disables the first FD related symbol and assigns a third FD related symbol within the range of the first FD related symbol. Claim 9 A communication method of a UE according to claim 8, wherein, after receiving the second FD-related configuration information, the UE communicates with the network without an FD-related operation, and after receiving the third FD-related configuration information, the UE communicates with the network through the third FD-related symbol. Claim 10 A communication method of a UE according to claim 1, wherein communication with the network is performed based on the second FD related setting information after a predetermined offset period following the reception of the second FD related setting information. Claim 11 A communication method of a UE according to claim 1, wherein the FD-related symbol includes an SBFD (Sub-Band Full Duplex) symbol. Claim 12 A communication method of a UE according to claim 1, wherein when the TDD UL-DL pattern information sets a plurality of TDD UL-DL patterns, the first and second FD related setting information sets the FD related symbols for each of the plurality of TDD UL-DL patterns. Claim 13 A method of communication of a network in a mobile communication system for performing communication with a user device (UE), comprising: transmitting TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information to the UE; transmitting cell-specific first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information to the UE; transmitting second FD related setting information that changes one or more first FD related symbols according to the cell-specific first FD related setting information; and performing communication with the UE according to the second FD related setting information. Claim 14 A user device (UE) that communicates with a network in a mobile communication system comprises: at least one processor; and at least one computer memory that can be operably connected to the at least one processor and stores instructions that, when executed, cause the at least one processor to perform operations, wherein the operations include receiving TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern configuration information from the network; receiving cell-specific first Full Duplex (FD) related configuration information based on the TDD UL-DL pattern information; receiving second FD related configuration information that changes one or more first FD related symbols according to the cell-specific first FD related configuration information; and communicating with the network according to the second FD related configuration information. Claim 15 A network that communicates with a user device (UE) in a mobile communication system comprises: at least one processor; and at least one computer memory that can be operably connected to the at least one processor and stores instructions that, when executed, cause the at least one processor to perform operations, wherein the operations include transmitting TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern configuration information to the UE; transmitting cell-specific first Full Duplex (FD) related configuration information based on the TDD UL-DL pattern information to the UE; transmitting second FD related configuration information that changes one or more first FD related symbols according to the cell-specific first FD related configuration information; and communicating with the UE according to the second FD related configuration information.

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