Communication based on Flexible SBFD Subband

Abstract

This document relates to a method for setting a flexible SBFD subband and performing communication based thereon, and an apparatus for doing so. A communication method of a user device (UE) for this purpose includes receiving TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information from the network; receiving first full duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information that sets a flexible FD related subband in one or more of the FD related symbols according to the first FD related setting information; and performing communication with the network according to one or more of the first FD related setting information or 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 for setting a flexible SBFD subband and performing communication based thereon, and an apparatus 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 performing communication more flexibly by utilizing one or more of the FD-related symbols (SBFD symbols) according to the first FD-related setting information according to the cell-specific method, in which a network sets an FD-related subband (SBFD subband) to a UE.

[0012] In addition, according to an embodiment, we propose a method for setting a variable FD-related subband (SBFD subband) in which a network receives one or more of a Channel Status Information (CSI) report or Sounding Reference Signal (SRS) transmission from a plurality of UEs, and performs the setting of a variable FD-related subband (SBFD subband) based thereon.

[0013] 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

[0014] 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 first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information for setting a flexible FD related subband in one or more of the FD related symbols according to the first FD related setting information; and performing communication with the network according to one or more of the first FD related setting information or the second FD related setting information.

[0015] The above variable FD related subband is configured with candidate variable FD related subbands through RRC (Radio Resource Control) signaling; and the candidate variable FD related subbands can be enabled or disabled by MAC (Medium Access Control) - CE (Control Element) or DCI (Downlink Control Information).

[0016] Through activation or deactivation by the MAC-CE or DCI, a first symbol with the variable FD-related subband activated and a second symbol with the variable FD-related subband deactivated may be placed within the FD-related symbol.

[0017] The above variable FD related subband may be set according to one or more of a first type setting set for the entire TDD UL-DL pattern, a second type setting set for the DL and UL sections of the TDD UL-DL pattern, or a third type setting set for any section within the TDD UL-DL pattern.

[0018] To support the second FD-related settings of the network, the UE may perform one or more of CSI (Channel Status Information) reporting or SRS (Sounding Reference Signal) transmission based on the variable subband.

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

[0020] At this time, one or more of a CSI (Channel Status Information) report or an SRS (Sounding Reference Signal) are received from the UE based on the variable subband, and the second FD related setting information can be configured based on the CSI report or the SRS.

[0021] The above UE includes a plurality of UEs, and the network can transmit configuration information for one or more of the transmission period, beam, transmission sequence of the SRS, or resource element (RE) of the above SRS for each of the plurality of UEs.

[0022] The transmission period of the above SRS may be set based on the above TDD UL-DL pattern information, but is not limited thereto.

[0023] The above CSI report may be based on CSI-RS transmitted through the variable FD related subband, and the CSI-RS may be multiplexed and transmitted to multiple UEs.

[0024] Additionally, the UE may include a plurality of UEs, and the network may transmit configuration information for one or more of a CSI-RS transmission period, a beam, a CSI-RS transmission sequence, or a resource element (RE) for each of the plurality of UEs.

[0025] Additionally, the UE includes a plurality of UEs, and the plurality of UEs may include one or more of a UL mode UE for SRS transmission, a DL mode UE for CSI-RS reception for CSI-RS reporting, or a variable mode UE for SRS transmission and CSI-RS reporting.

[0026] In addition, it is preferable that the network be configured such that a symbol for receiving an SRS from a first UE among the variable mode UEs or a symbol for transmitting a CSI-RS to the second UE is placed between a symbol for receiving an SRS from a first UE among the variable mode UEs and a symbol for transmitting a CSI-RS to the first UE.

[0027] Meanwhile, 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 first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information that sets a flexible FD related subband on one or more of the FD related symbols according to the first FD related setting information; and communicating with the network according to one or more of the first FD related setting information or the second FD related setting information.

[0028] 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 first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; transmitting second FD related setting information that sets a flexible FD related subband to one or more of the FD related symbols according to the first FD related setting information; and communicating with the UE according to one or more of the first FD related setting information or the second FD related setting information. Effects of the invention

[0029] According to the embodiments of the present invention as described above, a variable FD-related subband (SBFD subband) is set in one or more of the FD-related symbols (SBFD symbols) according to the first FD-related setting information according to the cell-specific method, and communication can be performed more flexibly by utilizing this.

[0030] In addition, according to an embodiment, to set a variable FD related subband (SBFD subband), the network receives one or more of CSI reports or SRS transmissions from a plurality of UEs, and based on this, sets a variable FD related subband (SBFD subband) and sets the variable subband by taking into account channel conditions and interference.

[0031] In addition, according to the embodiment, CSI-RS and SRS resources can be efficiently multiplexed to increase resource efficiency.

[0032] 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

[0033] 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 a variable SBFD subband setting 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 the form in which a variable SBFD subband is set within a TDD UL-DP pattern according to one embodiment of the present invention. FIG. 11 is a diagram illustrating a case in which a variable subband is operated in an on / off manner according to an embodiment of the present invention. FIGS. 12 to 14 are drawings for explaining setting types of variable subbands according to embodiments of the present invention. FIG. 15 is a diagram illustrating a method for a network to set up SRS transmission of a plurality of UEs according to an embodiment of the present invention. FIGS. 16 and 17 are drawings for explaining the relationship between the SRS transmission interval of the UE and the CSI-RS transmission interval of the network in variable mode according to embodiments of the present invention. FIG. 18 illustrates an example in which a multiplexing resource area for SRS transmission and CSI-RS reception is set within a single slot according to one 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

[0034] 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.

[0035] 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.

[0037] As described above, one aspect of the present invention proposes a method for setting a flexible SBFD subband and performing communication based thereon. To this end, the FD method currently being discussed in 5G will first be explained in detail.

[0038] Figure 2 is a diagram illustrating how to perform FD operation in 5G.

[0039] 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).

[0040] 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.

[0041] 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'.

[0043] Figures 3 and 4 are diagrams for explaining the comparison between SBFD and SSFD during FD operation in 5G.

[0044] 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.

[0045] 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.

[0047] 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.

[0048] 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).

[0049] 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'.

[0050] 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.

[0052] Below, a method for performing communication by setting up a variable FD-related subband (SBFD subband) is explained against this background.

[0053] FIG. 5 is a diagram illustrating a method for a UE and a network to communicate based on a variable SBFD subband setting according to an embodiment of the present invention.

[0054] First, the UE (510) can receive TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information from the network (520) (S510).

[0055] 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.

[0056] Additionally, the UE (510) can receive (S520) first FD related configuration information (SBFD configuration information) based on the TDD UL-DL pattern information from the network (520).

[0057] For existing SBFD-aware UEs, the subbands within SBFD symbols are fixed to function as either UL or DL. Furthermore, it was assumed that fixed frequency resources would be used. Consequently, this presented a disadvantage in that the selective use and efficient allocation of frequency resources for stable simultaneous data transmission were impossible when UL or DL ​​traffic increased. Additionally, it was impossible to selectively allocate frequency resources that minimize interference as the interference environment changed.

[0058] Accordingly, in one embodiment of the present invention, a variable subband usable for UL and DL is proposed, and an SBFD operation method based thereon is proposed.

[0059] To this end, in this embodiment, the UE (510) additionally receives (S530) second FD-related setting information from the network, which sets a variable FD-related subband in one or more of the FD-related symbols according to the first FD-related setting information. The variable FD-related subband described in the following embodiments is a subband set by the network (gNB), and the said subband refers to a subband that can operate as a subband for UL or DL ​​by the instruction of the network (gNB) or by the request of the UE. Specific settings for such variable FD-related subbands will be described in detail below.

[0060] Based on these variable FD related subband settings, the UE (510) can communicate with the network (520) (S540).

[0062] FIG. 6 is a diagram illustrating the TDD UL-DL pattern setting according to one embodiment of the present invention.

[0063] 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.

[0064] 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.

[0065] 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)).

[0067] FIG. 7 is a diagram illustrating the SBFD symbol setting considering the TDD UL-DL pattern according to one embodiment of the present invention.

[0068] 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).

[0069] 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.

[0071] FIGS. 8 and 9 are drawings for specifically explaining the concept of an activated BWP according to an embodiment of the present invention.

[0072] 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.

[0073] 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.

[0074] 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 ).

[0075] Meanwhile, these BWPs can be configured in various forms, as exemplified in Fig. 9.

[0076] 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.

[0078] Based on the above description, the operation method of the UE and network based on variable SBFD subband settings is explained in detail below.

[0080] Variable SBFD Subband Setting Method

[0081] FIG. 10 is a diagram illustrating the form in which a variable SBFD subband is set within a TDD UL-DP pattern according to one embodiment of the present invention.

[0082] FIG. 10 is illustrated assuming a single TDD-UL-DL pattern that is cell-specifically set. However, if two (or more) patterns are set, the same method may be applied to two (or more) consecutive patterns.

[0083] The first FD-related setting information (SBFD setting information) described in the embodiment of FIG. 5 sets a cell-specifically set semi-static SBFD symbol shown in FIG. 10, where symbol A and symbol B in FIG. 10 represent the start symbol and end symbol for this semi-static SBFD symbol.

[0084] The example in Fig. 10 illustrates a case where a variable subband is set in an existing semi-static SBFD symbol allocation area, and the variable subband is set and operated separately from the existing DL and UL subbands.

[0085] In the example of Fig. 10, there is only one variable subband, but one or more variable subbands may be allocated and operated.

[0086] The allocation of variable subbands can be configured in a cell-specific manner by the network (gNB) or through higher-layer signaling such as RRC (Radio Resource Control). After the RRC configuration, the variable subband can be operated to remain active.

[0088] Alternatively, after the RRC configuration of the variable subband, the configured candidate bands may be operated by enabling or disabling them. In this case, they can be enabled or disabled via instructions from lower-layer signaling, such as MAC-CE or DCI. At this time, such enabling or disabling can be operated in a UE-specific manner or in a UE group-specific manner.

[0089] In the case of UE group-unit instructions, if specific UEs are sufficiently separated from each other geographically, a group is formed consisting of those UEs. This offers the advantage of minimizing potential interference between UEs by ensuring that UEs sharing the same time-frequency usage resources are physically far apart.

[0090] 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.

[0092] FIG. 11 is a diagram illustrating a case in which a variable subband is operated in an on / off manner according to an embodiment of the present invention.

[0093] That is, the aforementioned activation / deactivation operation may be an activation / deactivation operation in the form of turning the variable subband on / off. This activation / deactivation operation for the variable subband may be an activation or deactivation operation for a symbol or slot to which the variable subband is assigned. For example, as shown in FIG. 11, activation or deactivation of specific areas may be indicated in a semi-statically configured SBFD symbol area to which the variable subband is assigned. Through this, as shown in FIG. 11, a first symbol (1110) with the variable SBFD subband activated, a second symbol (1120) with the variable SBFD subband deactivated, a third symbol (1130) with the variable SBFD subband activated, etc., may be placed within the semi-statically configured SBFD symbol.

[0095] FIGS. 12 to 14 are drawings for explaining setting types of variable subbands according to embodiments of the present invention.

[0096] As described above, within a variable subband that is activated based on the configuration and instructions of the network (gNB), the UE can transmit UL or receive DL within the variable subband based on the corresponding scheduling information after receiving DCI from the network (gNB). At this time, as illustrated in FIGS. 12 to 14, the variable SBFD subband can be configured in various types.

[0097] Specifically, FIG. 12 exemplarily illustrates a first type setting in which a variable subband is set across the entire TDD-UL-DL pattern.

[0098] FIG. 13 illustrates a second type setting in which variable subbands are set only for the DL and UL sections within the TDD-UL-DL pattern cycle.

[0099] In addition, FIG. 14 illustrates a third type setting in which a variable subband is set for any one or more intervals within the TDD-UL-DL pattern cycle.

[0100] It goes without saying that these first to third type settings can be applied in modified, expanded, or combined forms.

[0102] When operating the variable subband in Fig. 14, the setting of the time interval can be indicated by a combination of one or more of upper-level signaling such as RRC or lower-level signaling such as MAC-CE / DCI. At this time, the setting information for the time interval may include frequency information of the variable subband.

[0104] Measurement for variable subband settings

[0105] The following describes the measurements performed by the UE / network to configure and operate the variable subband as described above, and the configuration of the network's variable subband based on these measurements.

[0106] It is desirable for the network (gNB) to perform measurements of the wireless channel status and interference magnitude for the resources within the variable subband for use as UL or DL ​​resources in order to operate the variable subband as described above. To measure the channel status and interference in the DL and UL situations of such variable subbands, it is proposed to support the following operations.

[0107] (1) CSI-RS transmission of periodic or semi-persistent network (gNB) and SRS transmission of UE

[0108] (2) Based on the above RS transmission, the UE receives a CSI report on the CSI-RS-based channel status, and the network (gNB) performs an SRS-based UL channel status analysis.

[0110] Since the network (gNB) must be aware of the status of the variable subband reference UL and DL channels as well as interference, it is desirable to operate in a manner that simultaneously supports the above operations. To support these operations, configurations for periodic, semi-continuous, and dynamic CSI-RS transmission, SRS transmission, and CSI reporting can be established through higher-layer signaling such as RRC. When reporting CSI, the UE may include information such as CQI, L1-RSRP, L1-SINR, and RSSI measured based on RS transmitted in the variable subband.

[0111] For the measurement of DL interference, a zero power CSI-RS can be set up and transmitted by the network (gNB), and the UE can perform measurements for the indicated metrics in the corresponding CSI-RS resource area. For example, measurements of DL interference levels can be performed through RSSI measurements.

[0112] For the measurement of UL interference, a zero power SRS may be set by the network (gNB) and transmitted by the UE, and the network (gNB) may measure the UL channel status for the corresponding resource area. For example, the measurement of the UL interference level can be performed through RSSI measurement.

[0114] It is desirable for the network (gNB) to perform measurements of interference and radio channel conditions via CSI-RS or SRS for UL or DL ​​resource allocation within a variable subband. To this end, the following embodiments propose operating by distinguishing the following three modes for the corresponding measurements.

[0115] * UL Mode: A mode for measuring UL interference and UL channel status in the network (gNB).

[0116] * DL Mode: A mode for measuring DL interference and DL channel status in the UE

[0117] * Variable Mode: A mode for measuring both DL interference and DL channel status in the UE, and UL interference and UL channel status in the network (gNB).

[0119] UL Mode Operation Method

[0120] The UE can transmit periodic, semi-continuous, and dynamic forms of SRS to the network within specific time resource intervals in a variable subband.

[0121] In the SRS transmission area, SRSs for multiple UEs can be multiplexed. Additionally, a single UE can transmit multiple SRSs and support multiplexing for those SRSs. To this end, when configuring the SRS, the network may include settings for the SRS transmission pattern, the maximum number of UEs that can be multiplexed, and the maximum number of SRSs that can be multiplexed.

[0122] To increase resource efficiency, multiplexing of SRS resources for multiple UEs is possible using Method #1 and Method #2 below, depending on the receive beam configuration used by the network (gNB), and these methods can be applied in a combined form during SRS transmission.

[0124] Method #1: This method is applied when receiving beams of different networks (gNBs) must be applied to the SRSs of multiple UEs transmitting SRSs, and a method can be used in which the SRSs of each UE are multiplexed only within time resources. Alternatively, in the case where a single UE transmits multiple SRSs, if different transmitting beams or receiving beams of different networks (gNBs) must be applied to each SRS, a method can be used in which the SRSs are multiplexed only within time resources.

[0125] Method #2: Applied when the same network (gNB) receive beam is applied to the SRSs of multiple UEs transmitting SRSs, and each UE's SRS may utilize a multiplexing method using time or frequency resources. Alternatively, applied when a single UE transmits multiple SRSs and the same transmit / receive beam is applied to each of the SRSs, and the SRSs may be configured to be multiplexed using time or frequency resources.

[0127] In addition, the following methods may be applied for efficient SRS resource management. Furthermore, the following methods may be operated in a combined form.

[0129] Method #3: The SRS transmission period can be set differently for each UE. This can be configured differently depending on the rate at which the channel changes due to factors such as UE mobility.

[0130] Method #4: The length of the SRS sequence transmitted by each UE may vary. The SRS sequence may refer to a Zadoff-Chu (ZC) or Frank-Zadoff-Chu (FZC) sequence, and the sequence can be modulated and mapped to a symbol. At this time, BPSK modulation can be applied. In this description, the term SRS sequence refers to the SRS sequence that is finally mapped to a symbol.

[0131] Method #5: The resource allocation pattern for each RE (Resource Element) or PRB (Physical Resource Block) of the SRS transmitted in each cycle can be operated by setting the resource allocation pattern differently in each cycle to increase the accuracy of measurements on the wireless channel.

[0132] Method #6: REs transmitting SRS can be operated in an empty state. In other words, a zero-power SRS configuration is possible.

[0134] For the operation of Method #3, Method #4, and Method #6, a dedicated SRS format can be defined and operated, and the SRS format can be classified and configured based on the SRS sequence length, SRS transmission period, zero power status, etc.

[0135] As an example of a combination of Method #1 and Method #2, there are two UE groups (UE group A, UE group B), and each UE group is a group capable of receiving beams of the same network (gNB). Between UEs within UE group A and UE group B, SRS multiplexed at frequency within the same time resource can be transmitted as in Method #2. Between UE groups, multiplexing can be performed within the same time resource as in Method #1.

[0137] FIG. 15 is a diagram illustrating a method for a network to set up SRS transmission of a plurality of UEs according to an embodiment of the present invention.

[0138] As examined in relation to the above methods #1 to #6, the network can perform settings for the transmission period, beam, transmission sequence of the SRS, or resource element (RE), etc. of the SRS for each of the multiple UEs.

[0139] As in method #1, in Fig. 15, UE #3 transmits an SRS from a different time resource than other UEs (UE #1, UE #2), so that when the network (gNB) receives the SRS transmitted by UE #3, it can use a different receiving beam than the beam used when receiving the SRS transmitted by other UEs.

[0140] As in method #2, the SRS transmitted by UE #1 and UE #2 in Fig. 15 is received by the network (gNB) with the same receiving beam, and based on this, the UL channel and interference states can be measured.

[0141] As in Method #3, UE #3 can transmit SRS with a different period than other UEs (UE #1, UE #2). In other words, the SRS period can be configured and operated differently for each UE.

[0142] As in Method #4, the SRS sequence length of UE#3 can be set to twice the length of the other UEs (UE#1, UE#2). If the length of the SRS sequence of UE#3 is equal to the number of subcarriers within the variable subband, the SRS sequence lengths of UE#1 and UE#2 can be half of that. That is, different SRS formats can be set for each UE.

[0143] As shown in Method #5, when examining the SRS mapping for subcarriers within the variable subband of UE#1 and UE#2, it can be seen that their positions change per cycle. That is, if UE#1's SRS was transmitted on an odd-numbered subcarrier during the first SRS transmission, it may be transmitted on an even-numbered subcarrier during the next transmission cycle. UE#2 can be operated in a multiplexed form with mapping opposite to that of UE#1.

[0144] As in Method #6, a zero-power SRS may be allocated in each SRS transmission resource area according to the configuration and instructions for the SRS of the network (gNB) in FIG. 15. That is, no signal may be transmitted from the corresponding SRS resource.

[0145] The symbol location where the SRS is transmitted can be indicated by a combination of the slot and symbol index, the time offset of the slot's start symbol, etc., and these values ​​can be set to higher-level signaling such as RRC. By mapping the SRS to a variable subband, i.e., frequency resources, it can be mapped to the entire variable subband or to a contiguous PRB of a portion of the variable subband, depending on the configuration of the network (gNB).

[0146] When mapping such frequency resources, mapping is performed based on the highest or lowest subcarrier or PRB index within the frequency resources configured for SRS transmission, and SRS outside the subband may not be transmitted.

[0148] When setting the SRS transmission period, the value of the period allows one or more slots or symbols to be configured and operated in a continuous or discontinuous form within the resource intervals where SRS is transmitted within a cell-specific TDD UL-DL pattern period. Additionally, within a single TDD UL-DL pattern period, the periodicity of the SRS transmission intervals can be set in units of N times the TDD UL-DL pattern period. In this case, N can be an integer equal to or greater than 1. If N is 1, it means that SRS is transmitted in the pre-configured slots and symbols at every TDD UL-DL pattern period. If N is 2, it means that a TDD UL-DL pattern period in which SRS is transmitted occurs at an interval of one TDD UL-DL pattern period.

[0149] Alternatively, unlike the above method, a specific period can be set and operated regardless of the TDD UL-DL pattern period, and in this case, the period can be applied by considering only the time resources where a variable subband exists.

[0150] For example, when a variable subband is configured and operated as shown in Fig. 13, the period can be applied based on the combined area of ​​the DL slot / symbol period and the UL slot / symbol period. That is, the variable slot / symbol period can be operated so as to be excluded from the period.

[0151] For example, when a variable subband is configured and operated as shown in Fig. 14, the period can be applied based on the combined area of ​​the configured variable subband periods #1 and #2. That is, time resource sections that are not part of the configured variable subband period can be operated to be excluded from the period.

[0152] Alternatively, unlike the above method, it is possible to operate by determining the period based on slots and symbols over the entire time interval, and not transmitting the corresponding SRS if a variable subband is not set in the SRS transmission resource area that occurs in accordance with the period setting.

[0154] DL Mode Operation Method

[0155] The network (gNb) can transmit CSI-RS in periodic, semi-continuous, and dynamic forms within specific time resource intervals in a variable subband. In the CSI-RS transmission area, multiple CSI-RS transmissions transmitted to multiple UEs or to a single UE can be multiplexed. To this end, the CSI-RS configuration may include settings for the CSI-RS transmission pattern, the maximum number of UEs that can be multiplexed, and the maximum number of CSI-RS transmissions that can be multiplexed.

[0156] The above multiplexing can be supported by reusing the existing CSI-RS multiplexing method. To ensure efficient CSI-RS resource management, support for the following methods may be possible. Furthermore, it goes without saying that the following methods may be operated in modified, expanded, or combined forms.

[0158] Method #1: Applied when a network (gNB) transmits CSI-RS to multiple UEs and applies different transmit beams to each CSI-RS transmission, and multiplexes the CSI-RS transmitted by the network (gNB) only in terms of time resources. Alternatively, when a network (gNB) transmits and receives multiple CSI-RS to a single UE using different beams for each, a method in which the CSI-RS are multiplexed only in terms of time resources is possible.

[0159] Method #2: Applied when a network (gNB) transmits CSI-RS to multiple UEs and applies the same transmission beam to each CSI-RS transmission, and a method capable of multiplexing the CSI-RS transmitted by the network (gNB) using time or frequency resources. Alternatively, when a network (gNB) transmits and receives multiple CSI-RS to a single UE using the same beam, a method capable of multiplexing the CSI-RS using time or frequency resources is possible.

[0160] Method #3: The CSI-RS transmission period can be set differently for each UE. This can be configured differently depending on the rate at which the channel changes due to factors such as UE mobility.

[0161] Method #4: The length of the sequence for generating CSI-RS transmitted per UE may vary. Here, the sequence may refer to a random sequence composed of 0s and 1s. Conventional CSI-RS transmitted the random sequence through BPSK symbol mapping.

[0162] Method #5: The resource allocation pattern per RE or PRB of the CSI-RS transmitted every period may apply different resource allocation patterns per period to increase the accuracy of measurements on the wireless channel.

[0163] Method #6: REs transmitting CSI-RS can be operated in an empty state. In other words, zero-power CSI-RS configuration is possible. Zero-power CSI-RS can be allocated in each CSI-RS transmission resource area according to the configuration and instructions for CSI-RS of the network (gNB).

[0165] At least for the operation of Method #3, Method #4, and Method #6, a dedicated CSI-RS format can be defined and operated, and the CSI-RS format can be classified and configured based on the sequence length for CSI-RS generation, the CSI-RS transmission period, whether zero power is present, etc.

[0166] The symbol location where CSI-RS is transmitted can be indicated by a combination of the slot, symbol index, and the time offset relative to the start symbol of the slot, and these values ​​can be set to higher-layer signaling such as RRC. By mapping CSI-RS to a variable subband, i.e., frequency resources, it can be mapped to the entire variable subband or to a contiguous portion of the variable subband PRBs, depending on the configuration of the network (gNB).

[0167] When mapping the frequency resources above, mapping is performed based on the highest or lowest subcarrier or PRB index within the frequency resources set for CSI-RS transmission, and CSI-RS outside the subband may not be transmitted.

[0169] When setting the CSI-RS transmission period, the period value allows one or more slots or symbols in which CSI-RS is transmitted to be configured and operated within a cell-specific TDD UL-DL pattern period. Additionally, within a single TDD UL-DL pattern period, the periodicity of CSI-RS transmission intervals can be set in units of N times the TDD UL-DL pattern period. In this case, N can be an integer equal to or greater than 1. If N is 1, it means that CSI-RS is transmitted in the pre-configured slots and symbols for every TDD UL-DL pattern period. If N is 2, it means that a TDD UL-DL pattern period in which CSI-RS is transmitted occurs at an interval of one TDD UL-DL pattern period.

[0170] Alternatively, unlike the above method, a specific period can be set and operated regardless of the TDD UL-DL pattern period, and in this case, the period can be applied by considering only the time resources where a variable subband exists.

[0171] Alternatively, unlike the above method, it is possible to operate by determining the period based on slots and symbols over the entire time interval, and not performing the corresponding CSI-RS transmission if a variable subband is not set in the CSI-RS transmission resource area that occurs in accordance with the period setting.

[0173] Variable mode operation method

[0174] The variable mode can be set and operated for measuring channel status and interference status for UL and DL for a single UE.

[0175] Multiplexing between multiple SRSs and multiple CSI-RSs for a single UE is possible. Multiplexing between SRSs and CSI-RSs for multiple variable mode UEs is also possible. In addition, multiplexing between SRSs and CSI-RSs for a variable mode UE and a DL or UL mode UE is possible.

[0176] The above multiplexing method can be applied in simple, modified, extended, and combined forms of multiplexing methods in UL and DL modes.

[0178] A single UE can receive UL mode and DL mode settings from the network (gNB), respectively, and can measure the radio channel status and interference for UL and DL. In this case, the RSs transmitting or receiving in UL and DL modes can operate with different periods and settings. In contrast, in variable mode, the transmission and reception periods of the SRS transmitted by a single UE and the CSI-RS received from the network (gNB) can be set to be the same.

[0179] When configuring variable mode, higher-level signaling such as RRC can set and operate a common cycle applied to SRS and CSI-RS. Additionally, it can include configuration information for each RS or operate in correlation with them.

[0180] The method of setting and operating the cycle can be applied in simple, modified, extended, or combined forms of the method of setting and operating the cycle in UL and DL modes.

[0182] FIGS. 16 and 17 are drawings for explaining the relationship between the SRS transmission interval of the UE and the CSI-RS transmission interval of the network in variable mode according to embodiments of the present invention.

[0183] In variable mode, guard symbol(s) may be required between the segment where the UE transmits SRS and the segment where it receives CSI-RS transmitted from the network (gNB) due to processing for transmit / receive switching. Considering processing time, the network (gNB) may set a specific number of guard symbols and allocate them between the SRS transmission segment and the CSI-RS reception segment (from the UE's perspective) for operation.

[0184] At this time, as shown in Fig. 16, the system can be operated to prevent resource consumption caused by guard symbols through multiplexing of different UEs. This method applies when both UL and DL modes are configured for a single UE, or when a variable mode is configured. In this case, when the transmission section of the SRS and the transmission section of the CSI-RS are consecutive, it can be seen as a method to minimize guard symbol(s) due to processing for transmit / receive switching.

[0185] Figure 16 is an example of a case where the transmit / receive switching processing time requires one symbol interval. As shown in Figure 16, consecutive multiplexed RSs are assigned without assigning guard symbols.

[0187] From the perspective of UE#1, by transmitting an SRS at the 11th symbol (1610) and receiving a CSI-RS at the 13th symbol (1620), the 12th symbol (1630) can serve as a guard symbol. The 12th symbol (1630) is the symbol interval where UE#2 transmits the SRS, and from the perspective of UE#2, the CSI-RS symbol interval (1620) received by UE#1 can also be used as a guard symbol interval.

[0188] If two symbol intervals are required for the transmit / receive switching processing time, as shown in FIG. 17, two guard symbol effects can be achieved by allocating one guard symbol between the SRS transmission interval and the CSI-RS reception interval from the perspective of the UE.

[0189] That is, from the perspective of UE#1, by transmitting an SRS at the 10th symbol (1710) and receiving a CSI-RS at the 13th symbol (1720), the 11th (1730) and 12th symbols (1750) can serve as guard symbols. At this time, the 11th symbol (1730) is the symbol interval where UE#2 transmits the SRS, and the 12th symbol (1750) is the interval assigned as a guard symbol by the network (gNB). It can be seen from FIG. 17 that the same effect occurs from the perspective of UE#2.

[0190] Therefore, as described above, allocation is possible by minimizing guard symbols through multiplexing of RSs of the same type for multiple users. In other words, operation can be performed by setting up multiplexing intervals between SRSs and between CSI and RSs.

[0191] The setting and operation method for the above cycle can be applied in simple, modified, extended, or combined forms of the multiplexing method in UL and DL modes.

[0193] In order to minimize the scheduling complexity of the network (gNB) for channel state and interference measurement and to operate efficiently, the network (gNB) can pre-configure and operate SRS transmission and CSI-RS reception intervals for variable mode, UL mode, and DL mode UEs.

[0194] Alternatively, it may be operated with only one or more combinations of UL, DL, and variable modes. Or, other modes other than the three modes may be defined and set for operation. However, for convenience of explanation, this specification may be described based on the three modes.

[0196] Since operating SRS transmission and CSI-RS reception sections separately for each UE increases scheduling complexity and makes resource allocation difficult, dedicated resources for RS-based measurements can be operated based on time resources and periods set within a variable subband.

[0197] The transmission time resources of the RSs may consist of one or more slots or multiple symbols, and the repetition of the interval, i.e., the setting and operation method for the period, may be applied in simple, modified, extended, or combined forms of the period setting and operation methods in UL and DL modes.

[0199] FIG. 18 illustrates an example in which a multiplexing resource area for SRS transmission and CSI-RS reception is set within a single slot according to one embodiment of the present invention.

[0200] The corresponding time resource area may consist of multiple symbols or multiple slots, rather than a single slot. Additionally, although the allocation of time resources is continuous, multiple discontinuous time resource areas can be configured and operated as a single resource area for SRS transmission and CSI-RS reception.

[0201] In Fig. 18, the ratio of the SRS multiplexing section to the CSI-RS multiplexing section is 1:1, but various ratios can be set.

[0202] Based on Fig. 18, in the SRS multiplexing section, the SRS of the UL mode UE and the variable mode UE can be multiplexed, and in the CSI-RS multiplexing section, the CSI-RS of the DL mode UE and the variable mode UE can be multiplexed.

[0203] When the UE is in variable mode for transmitting SRS and receiving CSI-RS, the interval between the transmission of SRS and the reception of CSI-RS can be operated to be separated by at least X symbols. The value of X can be set to be equal to or greater than the switching processing period of the transmit and receive operations of the UE and the network (gNB).

[0204] Alternatively, for operational convenience, resources can be allocated and operated such that the symbol offset from the start symbol of the SRS transmission section of the corresponding UE to the SRS transmission symbol is the same as the symbol offset from the start symbol of the CSI-RS reception section to the position of the CSI-RS reception symbol.

[0205] The above settings for the SRS transmission and CSI-RS reception intervals can be set by upper-layer signaling such as RRC, and the setting values ​​can be set and operated to include the time for SRS transmission and CSI-RS reception, the size and location of frequency resources, the ratio of the SRS multiplexing interval and the CSI-RS multiplexing interval, the repetition period of the multiplexing interval, the number of guard symbols required for SRS and CSI-RS allocation to the same UE, or the number of symbols X, which is a scheduling constraint value.

[0206] Within the variable subband, the settings for the above SRS transmission and CSI-RS reception intervals are configured in a cell-specific manner by the network (gNB), so that they can be operated to support multiplexing between UEs.

[0207] Based on the cell-specific configuration information of the network (gNB) for the above-mentioned SRS transmission and CSI-RS reception sections, channel status and interference measurements can be performed in accordance with the UE-specific configuration and instructions related to the SRS transmission and CSI-RS reception operations of the network (gNB).

[0209] In cases where UEs in UL mode, DL mode, or variable mode transmit SRS or receive CSI-RS for channel state and interference measurement, the following methods may be applied to avoid interference with UEs transmitting or receiving data.

[0210] When the network (gNB) transmits a UL grant via DCI to UEs transmitting or receiving data, it may include information about the resource area where the SRS or CSI-RS is allocated, so that when a UE transmits data, it can operate to allocate UL resources and transmit while avoiding that area.

[0211] When the network (gNB) transmits a DL grant via DCI to UEs transmitting or receiving data, it may include information about resource areas where SRS or CSI-RS is allocated, and when a UE receives data, it may operate to receive and decode data from REs excluding those areas.

[0212] Alternatively, the network (gNB) can set information about resource areas to which SRS or CSI-RS are allocated using upper-layer signaling such as RRC in a cell-specific form for UEs transmitting or receiving data.

[0213] To efficiently transmit information regarding the resource area allocated to the above-mentioned SRS or CSI-RS, it can be configured and operated as a new zero-power (ZP) RS type. In other words, the ZP-RS can be operated by simply setting the resource area. Furthermore, this resource area can be configured and operated in conjunction with the resource area settings of the SRS and CSI-RS that are configured for transmission for channel status and interference measurement. For example, the resources of the ZP-RS can be configured and operated to match the resources allocated for the transmission of multiple SRS and CSI-RS.

[0214] Based on the above ZP-RS configuration information, the UE can transmit data by mapping it while leaving the corresponding ZP-RS area empty when transmitting UL data, and can decode data excluding the corresponding ZP-RS area when receiving DL data.

[0216] Device configuration

[0217] FIG. 19 illustrates a wireless device that can be applied to the present technology.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0226] 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.

[0227] 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

[0228] The variable SBFD subband-based communication method and apparatus for the same according to the embodiments of the present invention as described above are suitable for use in the SBFD-related communication environment of 5G systems 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 first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information for setting a flexible FD related subband on one or more of the FD related symbols according to the first FD related setting information; and communicating with the network according to one or more of the first FD related setting information or the second FD related setting information. Claim 2 A communication method of a UE according to claim 1, wherein the variable FD related subband is configured as a candidate variable FD related subband through RRC (Radio Resource Control) signaling; and the candidate variable FD related subband is enabled or disabled by MAC (Medium Access Control) - CE (Control Element) or DCI (Downlink Control Information). Claim 3 A communication method of a UE according to claim 2, wherein, through activation or deactivation by the MAC-CE or DCI, a first symbol in which the variable FD-related subband is activated and a second symbol in which it is deactivated are placed within the FD-related symbol. Claim 4 A communication method of a UE according to claim 1, wherein the variable FD related subband is set according to one or more of a first type setting set for the entire TDD UL-DL pattern, a second type setting set for the DL and UL sections of the TDD UL-DL pattern, or a third type setting set for any section within the TDD UL-DL pattern. Claim 5 A communication method of a UE according to claim 1, wherein the UE performs one or more of CSI (Channel Status Information) reporting or SRS (Sounding Reference Signal) transmission based on the variable subband to support the second FD related settings of the network. Claim 6 A method of communication of a network in a mobile communication system for communicating with a user device (UE), comprising: transmitting TDD (Time Division Duplexing) UL (Uplink)-DL (Downlink) pattern setting information to the UE; transmitting first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; transmitting second FD related setting information for setting a flexible FD related subband to one or more of the FD related symbols according to the first FD related setting information; and communicating with the UE according to one or more of the first FD related setting information or the second FD related setting information. Claim 7 A communication method of a network according to claim 6, wherein one or more of a CSI (Channel Status Information) report or an SRS (Sounding Reference Signal) are received from the UE based on the variable subband, and configuration information related to the second FD is configured based on the CSI report or the SRS. Claim 8 A communication method of a network, wherein the UE includes a plurality of UEs, and the network transmits configuration information for one or more of the transmission period of the SRS, the beam, the transmission sequence of the SRS, or the resource element (RE) for each of the plurality of UEs. Claim 9 In claim 7, a communication method of a network in which the transmission period of the SRS is set based on the TDD UL-DL pattern information. Claim 10 In claim 7, the above CSI report is based on a CSI-RS transmitted through the variable FD related subband, and the CSI-RS is multiplexed and transmitted to a plurality of UEs, a communication method of a network. Claim 11 A communication method of a network, wherein the UE includes a plurality of UEs, and the network transmits configuration information for one or more of a CSI-RS transmission period, a beam, a CSI-RS transmission sequence, or a resource element (RE) for each of the plurality of UEs. Claim 12 A communication method of a network, wherein the UE comprises a plurality of UEs, and the plurality of UEs comprises one or more of a UL mode UE for SRS transmission, a DL mode UE for CSI-RS reception for CSI-RS reporting, or a variable mode UE for SRS transmission and CSI-RS reporting. Claim 13 A communication method of a network, wherein the network is configured such that a symbol for receiving an SRS from a first UE among the variable mode UEs or a symbol for transmitting a CSI-RS to the second UE is placed between a symbol for receiving an SRS from a first UE among the variable mode UEs and a symbol for transmitting a CSI-RS to the first UE. 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 setting information from the network; receiving first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; receiving second FD related setting information that sets a flexible FD related subband to one or more of the FD related symbols according to the first FD related setting information; and communicating with the network according to one or more of the first FD related setting information or the second FD related setting 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 setting information to the UE; transmitting first Full Duplex (FD) related setting information based on the TDD UL-DL pattern information; transmitting second FD related setting information that sets a flexible FD related subband on one or more of the FD related symbols according to the first FD related setting information; and communicating with the UE according to one or more of the first FD related setting information or the second FD related setting information.

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