APPARATUS AND METHOD FOR RESOURCE CONFIGURATION IN A WIRELESS COMMUNICATION SYSTEM - Patent application

Abstract

According to various embodiments of the present disclosure, there is provided a method for operating a terminal (user equipment, UE) in a wireless communication system, including the steps of receiving, from a base station (BS), a measurement command for RSRP (reference signal received power) of an SRS (sounding reference signal) within a time interval in which SBFD (subband full duplex) is available; receiving, from the base station, configuration information for a measurement gap within the measurement time interval of the SRS; receiving, in the measurement gap, the SRS without receiving any other downlink signals other than the SRS; and transmitting, to the base station, a report message regarding the measurement result of the RSRP for the SRS.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE This disclosure relates to wireless communication systems, and more particularly to an apparatus and method for resource configuration in a wireless communication system. [Background technology]

[0002] 5G will bring about new service types such as XR (Extended Reality), AI-based services, and self-driving cars, which require dynamic traffic changes in both DL and UL directions and low latency for packet transmission. 5G services are expected to see an explosive increase in traffic load to support these diverse new use cases.

[0003] On the other hand, existing semi-static or dynamic TDD UL / DL configurations have limitations such as transmission time delay and inter-operator interference issues, while conventional FDD schemes have limitations in terms of efficient frequency resource utilization in the DL / UL directions.

[0004] Therefore, in order to achieve low latency and efficient resource utilization in NR, the introduction of full duplex operation within single carrier is being discussed. Summary of the Invention [Problem to be solved by the invention]

[0005] To address the aforementioned problems, the present disclosure provides an apparatus and method for resource configuration in a wireless communication system.

[0006] The technical problems to be achieved in this specification are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those having ordinary skill in the art to which the present invention pertains from the following description. [Means for solving the problem]

[0007] According to various embodiments of the present disclosure, there is provided a method for operating a terminal (user equipment, UE) in a wireless communication system, including the steps of receiving, from a base station (BS), a command to measure reference signal received power (RSRP) of a sounding reference signal (SRS) of another terminal within a subband full duplex (SBFD) available time interval; receiving from the base station configuration information for a measurement gap or a downlink rate-matching resource within the measurement time interval of the SRS; receiving, in the measurement gap or the downlink rate-matching resource, no downlink signals other than the STS for the SRS; and transmitting a report message regarding the measurement result of the RSRP for the SRS to the base station.

[0008] According to various embodiments of the present disclosure, there is provided a method for operating a base station (BS) in a wireless communication system, the method including the steps of: transmitting to a user equipment (UE) a command to measure reference signal received power (RSRP) of a sounding reference signal (SRS) of another terminal within a subband full duplex (SBFD) available time interval; transmitting to the UE configuration information for a measurement gap or a downlink rate-matching resource within the measurement time interval of the SRS; and receiving from the UE a report message for a measurement result of the RSRP for the SRS based on the measurement gap or the downlink rate-matching resource.

[0009] According to various embodiments of the present disclosure, there is provided a terminal in a wireless communication system, the terminal including a transceiver, at least one processor, and at least one memory operably connected to the at least one processor and storing instructions for performing operations when executed by the at least one processor, the operations including all steps of a method for operating a terminal according to various embodiments of the present disclosure.

[0010] According to various embodiments of the present disclosure, there is provided a base station in a wireless communication system, the base station including a transceiver, at least one processor, and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations, the operations including all steps of a method of operating a base station according to various embodiments of the present disclosure.

[0011] According to various embodiments of the present disclosure, there is provided a control device for controlling a terminal in a wireless communication system, the control device including at least one processor and at least one memory operably connected to the at least one processor, the at least one memory storing instructions for performing operations based on being executed by the at least one processor, the operations including all steps of a method for operating a terminal according to various embodiments of the present disclosure.

[0012] According to various embodiments of the present disclosure, there is provided a control device for controlling a base station in a wireless communication system, the control device including at least one processor and at least one memory operably connected to the at least one processor, the at least one memory storing instructions for performing operations based on being executed by the at least one processor, the operations including all steps in a method for operating a base station according to various embodiments of the present disclosure.

[0013] According to various embodiments of the present disclosure, there is provided one or more non-transitory computer-readable media storing one or more instructions, the one or more instructions being executed by one or more processors to perform operations, the operations including all of the methods of operating a terminal according to various embodiments of the present disclosure.

[0014] According to various embodiments of the present disclosure, there is provided one or more non-transitory computer-readable media storing one or more instructions, the one or more instructions being executed by one or more processors to perform operations, the operations including all of the methods of operating a base station according to various embodiments of the present disclosure. [Effects of the Invention]

[0015] To address the aforementioned problems, the present disclosure may provide an apparatus and method for resource configuration in a wireless communication system. [Brief explanation of the drawings]

[0016] The following accompanying drawings are intended to facilitate understanding of the present disclosure and, together with the detailed description, can provide embodiments of the present disclosure. However, the technical features of the present disclosure are not limited to the specific drawings, and the features disclosed in each drawing can be combined with each other to form a new embodiment. Reference numerals in each drawing can refer to structural elements.

[0017] [Figure 1] FIG. 1 is a diagram showing an example of physical channels used in a system applicable to the present disclosure and a general signal transmission method using these channels. [Figure 2] FIG. 1 is a diagram illustrating an example of a structure of a radio frame used in a system applicable to the present disclosure. [Figure 3] FIG. 1 illustrates an example of a slot structure used in a system applicable to the present disclosure. [Figure 4] FIG. 1 illustrates an example of a slot structure used in a system applicable to the present disclosure. [Figure 5] FIG. 1 is a diagram illustrating an example of a structure of a radio frame used in a system applicable to the present disclosure. [Figure 6] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure. [Figure 7] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure. [Figure 8] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure. [Figure 9] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure. [Figure 10] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure. [Figure 11] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure. [Figure 12] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure. [Figure 13] FIG. 10 is a diagram illustrating an example of information indicating downlink and uplink resources based on antenna configuration in a system applicable to the present disclosure. [Figure 14] FIG. 10 is a diagram illustrating an example of a separate Tx / Rx antenna array model in a system applicable to the present disclosure. [Figure 15] FIG. 1 illustrates an example of (a) Legacy TDD with shared-Tx / Rx antenna array in a system applicable to the present disclosure. [Figure 16] FIG. 10 is a diagram showing an example of (b) SBFD antenna configuration Option-1 (Method 1) in a system applicable to the present disclosure. [Figure 17] FIG. 10 is a diagram showing an example of (c) SBFD antenna configuration Option-2 (Method 2-1) in a system applicable to the present disclosure. [Figure 18] FIG. 10 is a diagram showing an example of (d) SBFD antenna configuration option-2 (Method 2-2) in a system applicable to the present disclosure. [Figure 19] FIG. 10 is a diagram illustrating an example of (e)SBFD antenna configuration Option-3 (Method 3-1) in a system applicable to the present disclosure. [Figure 20] FIG. 10 is a diagram showing an example of (f) SBFD antenna configuration Option-3 (Method 3-2) in a system applicable to the present disclosure. [Figure 21] FIG. 1 is a diagram illustrating an example of an operation process of a terminal (user equipment, UE) in a system applicable to the present disclosure. [Figure 22] FIG. 1 is a diagram illustrating an example of an operation process of a base station (BS) in a system applicable to the present disclosure. [Figure 23] FIG. 2 is a diagram illustrating an example of the structure of a first device and a second device in a system applicable to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0018] In various embodiments of the present disclosure, "A or B" can mean "A only," "B only," or "both A and B." In other words, in various embodiments of the present disclosure, "A or B" can be interpreted as "A and / or B." For example, in various embodiments of the present disclosure, "A, B, or C" can mean "A only," "B only," "C only," or "any combination of A, B, and C."

[0019] A slash ( / ) or a comma used in various embodiments of the present disclosure can mean "and / or." For example, "A / B" can mean "A and / or B." Thus, "A / B" can mean "A only," "B only," or "both A and B." For example, "A,B,C" can mean "A, B, or C."

[0020] In various embodiments of the present disclosure, "at least one of A and B" can mean "A only," "B only," or "both A and B." Also, in various embodiments of the present disclosure, the expressions "at least one of A or B" and "at least one of A and / or B" can be interpreted similarly to "at least one of A and B."

[0021] Furthermore, in various embodiments of the present disclosure, "at least one of A, B, and C" can mean "A only," "B only," "C only," or "any combination of A, B, and C." Furthermore, "at least one of A, B, or C" or "at least one of A, B, and / or C" can mean "at least one of A, B, and C."

[0022] Furthermore, parentheses used in various embodiments of the present disclosure may mean "for example." Specifically, when "control information (PDCCH)" is used, "PDCCH" may be suggested as an example of "control information." In other words, "control information" in various embodiments of the present disclosure is not limited to "PDCCH," and "PDCCH" may be suggested as an example of "control information." Furthermore, when "control information (i.e., PDCCH)" is used, "PDCCH" may be suggested as an example of "control information."

[0023] In various embodiments of the present disclosure, technical features described separately in one drawing can be realized separately or simultaneously.

[0024] General signal transmission method in 3GPP (registered trademark)

[0025] Physical Channels and General Signaling

[0026] 1 is a diagram illustrating an example of physical channels used in a system applicable to the present disclosure and a general signal transmission method using the channels. Specifically, FIG. 1 illustrates physical channels and general signal transmission used in a 3GPP system.

[0027] Figure 1 illustrates physical channels and general signal transmission used in a 3GPP system. In a wireless communication system, a terminal receives information from a base station via a downlink (DL), and transmits information to the base station via an uplink (UL). Information exchanged between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type / use of the information exchanged.

[0028] When a terminal is powered on after being turned off or newly enters a cell, it performs an initial cell search, such as synchronizing with a base station (S11). To do this, the terminal receives a Primary Synchronization Channel (PSCH) and a Secondary Synchronization Channel (SSCH) from the base station to synchronize with the base station and acquire information such as a cell identity (ID). The terminal can also receive a Physical Broadcast Channel (PBCH) from the base station to acquire broadcast information within the cell. The terminal can also receive a Downlink Reference Signal (DL RS) during the initial cell search step to check the downlink channel status.

[0029] After completing the initial cell search, the terminal receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) corresponding to the PDCCH to acquire more specific system information (S12).

[0030] The terminal then performs a random access procedure to complete connection to the base station (S13 to S16). Specifically, the terminal transmits a preamble over a physical random access channel (PRACH) (S13) and receives a random access response (RAR) for the preamble over a PDCCH and its corresponding PDSCH (S14). The terminal then transmits a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15) and performs a contention resolution procedure for the PDCCH and its corresponding PDSCH (S16).

[0031] After performing the above-described procedures, the UE then performs PDCCH / PDSCH reception (S17) and PUSCH / PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink / downlink signal transmission procedure. Control information transmitted by the UE to the base station is called UCI (Uplink Control Information). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted via PUCCH, but may be transmitted via PUSCH if control information and data must be transmitted simultaneously. Furthermore, the UE may transmit UCI aperiodically via PUSCH according to a request / instruction from the network.

[0032] OFDM (Orthogonal Frequency Division Multiplexing) numerology

[0033] The new RAT system may use an OFDM transmission scheme or a similar transmission scheme. The new RAT system may follow different OFDM parameters from those of LTE. Alternatively, the new RAT system may follow the existing LTE / LTE-A numerology but have a larger system bandwidth (e.g., 100 MHz). Alternatively, one cell may support multiple numerologies. That is, UEs operating with different numerologies may coexist within one cell.

[0034] Radio frame structure

[0035] FIG. 2 is a diagram showing an example of a structure of a radio frame used in a system applicable to the present disclosure.

[0036] In NR, uplink and downlink transmissions are organized into frames. A radio frame has a length of 10 ms and is defined by two 5 ms half-frames (HF). A half-frame is defined by five 1 ms subframes (SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP). When a normal CP is used, each slot contains 14 symbols. When an extended CP is used, each slot contains 12 symbols. Here, a symbol may include an OFDM symbol (or a CP-OFDM symbol) or an SC-FDMA symbol (or a DFT-s-OFDM symbol).

[0037] Table 1 illustrates that when a normal CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0038] [Table 1]

[0039] N slot symb is the number of symbols in the slot. N frame,u slot is the number of slots in the frame. subframe,u slot is the number of slots in a subframe.

[0040] Table 2 illustrates that when an extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0041] [Table 2]

[0042] NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, a 30 kHz / 60 kHz SCS supports dense urban areas, lower latency, and wider carrier bandwidths, and a 60 kHz or higher SCS supports bandwidths greater than 24.25 GHz to overcome phase noise.

[0043] The NR frequency band can be defined as two types of frequency ranges (FR1 and FR2). The values ​​of the frequency ranges may be changed. For example, the two types of frequency ranges (FR1 and FR2) are shown in Table 3 below. For convenience of explanation, among the frequency ranges used in the NR system, FR1 means the "sub 6 GHz range" and FR2 means the "above 6 GHz range," and they may also be called millimeter wave (mmW).

[0044] [Table 3]

[0045] As mentioned above, the numerical values ​​of the frequency ranges of the NR system may be changed. For example, FR1 may include the band from 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include frequency bands above 6 GHz (or 5850, 5900, 5925 MHz, etc.). For example, the frequency bands above 6 GHz (or 5850, 5900, 5925 MHz, etc.) included in FR1 may include unlicensed bands. Unlicensed bands can be used for various purposes, such as communications for vehicles (e.g., autonomous driving).

[0046] [Table 4]

[0047] In an NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) can be set differently among multiple cells merged into one terminal, and thus the (absolute time) duration of time resources (e.g., SF, slot, or TTI) (commonly referred to as TU (Time Unit) for convenience) consisting of the same number of symbols can be set differently among the merged cells.

[0048] FIG. 3 is a diagram illustrating an example of a slot structure used in a system applicable to the present disclosure.

[0049] A slot contains multiple symbols in the time domain. For example, in the case of a normal CP, one slot contains seven symbols, while in the case of an extended CP, one slot contains six symbols. A carrier contains multiple subcarriers in the frequency domain. A resource block (RB) is defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) is defined by multiple (P) consecutive RBs in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier may contain up to N (e.g., 5) BWPs. Data communication is performed via activated BWPs, and only one BWP can be activated for one terminal. Each element in the resource grid is called a resource element (RE), and one complex symbol can be mapped to it.

[0050] FIG. 4 is a diagram illustrating an example of a slot structure used in a system applicable to the present disclosure.

[0051] Specifically, FIG. 4 illustrates the structure of a self-contained slot.

[0052] In an NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and a UL control channel can all be contained within one slot. For example, the first N symbols in a slot are used to transmit the DL control channel (hereinafter referred to as the DL control region), and the last M symbols in the slot can be used to transmit the UL control channel (hereinafter referred to as the UL control region). N and M are each integers equal to or greater than 0. The resource region between the DL control region and the UL control region (hereinafter referred to as the data region) is used for DL ​​data transmission or UL data transmission. As an example, the following configuration can be considered. Each section is arranged in chronological order.

[0053] 1.DL only configuration

[0054] 2.UL only configuration

[0055] 3.Mixed UL-DL configuration

[0056] -DL area + GP (Guard Period) + UL control area

[0057] -DL control area + GP + UL area

[0058] *DL area: (i) DL data area, (ii) DL control area + DL data area

[0059] *UL area: (i) UL data area, (ii) UL data area + UL control area

[0060] A PDCCH may be transmitted in the DL control region, and a PDSCH may be transmitted in the DL data region. A PUCCH may be transmitted in the UL control region, and a PUSCH may be transmitted in the UL data region. Downlink Control Information (DCI), such as DL data scheduling information and UL data scheduling information, may be transmitted in the PDCCH. Uplink Control Information (UCI), such as ACK / NACK (Positive Acknowledgement / Negative Acknowledgement) information for DL ​​data, CSI (Channel State Information), and SR (Scheduling Request), may be transmitted in the PUCCH. The GP provides a time gap when the base station and the terminal switch from a transmission mode to a reception mode or from a reception mode to a transmission mode. Some symbols at the time of switching from DL to UL within a subframe may be set as the GP.

[0061] Full duplex operation for NR

[0062] 5G will bring about new service types such as XR (Extended Reality), AI-based services, and self-driving cars, which require dynamic traffic changes in both DL and UL directions and low latency for packet transmission. 5G services are expected to see an explosive increase in traffic load to support these diverse new use cases.

[0063] On the other hand, existing semi-static or dynamic TDD UL / DL configurations have limitations such as transmission time delay and inter-operator interference issues, while conventional FDD schemes have limitations in terms of efficient frequency resource utilization in the DL / UL directions.

[0064] Therefore, in order to achieve low latency and efficient resource utilization in NR, the introduction of full duplex operation within single carrier is being discussed.

[0065] FIG. 5 is a diagram showing an example of a structure of a radio frame used in a system applicable to the present disclosure.

[0066] As examples of methods for applying full duplex in intra-carrier, subband-wise full duplex (SB-FD) and spectrum-sharing full duplex (SS-FD) can be considered, as shown in Figure 5. In the case of SB-FD, DL and UL are transmitted and received using different frequency resources on the same carrier. That is, DL and UL have different frequency resources for the same time resource. In the case of SS-FD, DL and UL are transmitted and received using the same frequency resource or overlapping frequency resource on the same carrier. That is, DL and UL can have the same or overlapping frequency resource for the same time resource.

[0067] Such full-duplex operation may be used in combination with existing half-duplex operation. In existing half-duplex-based TDD operation, only a portion of the time resources may be used for full-duplex operation. SB-FD or SS-FD operation can be performed in the time resources for full-duplex operation.

[0068] FIG. 6 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure.

[0069] FIG. 7 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure.

[0070] 6 and 7 show an example in which time resources operating in HD (half duplex) and time resources operating in FD (full duplex) such as SB-FD or SS-FD coexist. In Fig. 6, some time resources operate in SB-FD and the remaining time resources operate in HD, while in Fig. 7, some time resources operate in SS-FD and the remaining time resources operate in HD. In this case, the unit of the time resources may be, for example, a slot or a symbol.

[0071] In time resources operating in SB-FD, some frequency resources are used as DL resources and some frequency resources are used as UL resources. A guard band (or guard frequency resource or guard subcarrier(s)) that is unused and empty for both DL and UL may exist between the DL and UL frequency resources. In time resources operating in SF-FD, the entire frequency resource may be used for both DL and UL. Alternatively, to reduce the impact of interference from other adjacent carriers (i.e., adjacent carrier interference (ACI)), some frequency resources on one or both ends of a carrier may not be used for DL ​​and / or UL. That is, one or both ends of a carrier may be used as a guard band that is unused for both DL and UL. Alternatively, to reduce the impact of ACI on UL reception, one or both ends of a carrier may be used only for DL ​​transmission.

[0072] In this disclosure, a slot resource that operates in HD is referred to as an HD slot, a slot resource that operates in SB-FD is referred to as an SB-FD slot, and a slot resource that operates in SS-FD is referred to as an SS-FD slot. In addition, an SS-FD slot and an SS-FD slot are commonly referred to as an FD slot.

[0073] In the present disclosure, among all frequency resources in time resources operating in FD, frequency resources operating as DL are referred to as DL sub-bands, and frequency resources operating as UL are referred to as UL sub-bands.

[0074] In the case of the above-mentioned full duplex operation, full duplex operation can be performed from both the gNB's perspective and the UE's perspective. That is, both the gNB and the UE can simultaneously transmit and receive DL and UL using the same or different frequency resources in the same time resource. Alternatively, only the gNB can perform full duplex operation, and the UE can perform half duplex operation. The gNB can simultaneously transmit and receive DL and UL using the same or different frequency resources in the same time resource, but the UE can only perform DL reception or UL transmission in a specific time resource. In this case, the gNB performs full duplex operation by performing DL transmission and UL reception with different UEs at the same time.

[0075] The present disclosure generally describes the gNB performing full duplex operation and the UE performing half duplex operation. However, the present disclosure can also be applied to the case where both the gNB and the UE perform full duplex operation.

[0076] Technical Problem to be Solved by the Invention

[0077] In the following, the term "network" may be interpreted as a next generation Node B (gNB) or a Centralized Unit (CU) / Distributed Unit (DU). Also, the term "user equipment (UE)" may be interpreted as a Mobile Termination (MT) of an Integrated Access / Backhaul (IAB) node.

[0078] DL / UL time / frequency resource characteristics for SB-FD and SS-FD operation

[0079] FIG. 8 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure.

[0080] FIG. 9 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure.

[0081] FIG. 10 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure.

[0082] FIG. 11 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure.

[0083] In this disclosure, it is assumed that a cell (gNB) performs both DL transmission and UL reception in the same time resource using an FD scheme such as SB-FD or SS-FD. More specifically, it is assumed that a cell performs HD operation in a first time resource and FD operation in a second time resource (which may be the remaining time resource excluding the first time resource).

[0084] In the first time resource for HD operation, the network performs DL or UL operation over the entire frequency resources that make up the entire system bandwidth. Within the first time resource for HD operation, the network performs DL operation over the 1-1 time resource and UL operation over the 1-2 time resource. At this time, the 1-1 time resource and the 1-2 time resource do not overlap each other.

[0085] For the second time resource for performing FD operation, the network performs DL operation via all or part of the frequency resources (first frequency resources) that make up the system bandwidth of the cell, and performs UL operation via all or part of the frequency resources (second frequency resources).

[0086] For example, as shown in Figure 8, a time resource operating in HD corresponds to the first time resource, and a time resource operating in SB-FD corresponds to the second time resource. For the first time resource, a time resource designated as DL corresponds to the 1-1 time resource, and a time resource designated as UL corresponds to the 1-2 time resource. As shown in Figure 9, for the second time resource, a frequency resource operating in DL corresponds to the first frequency resource, and a frequency resource operating in UL corresponds to the second frequency resource.

[0087] As another example, as shown in FIG. 10, a time resource marked as operating in HD corresponds to the first time resource, and a time resource marked as operating in SS-FD corresponds to the second time resource. For the first time resource, a time resource marked as DL corresponds to the 1-1 time resource, and a time resource marked as UL corresponds to the 1-2 time resource. For the second time resource, a frequency resource operating in DL corresponds to the first frequency resource, and a frequency resource operating in UL corresponds to the second frequency resource. A frequency resource marked as DL+UL is a frequency resource capable of both DL and UL operation, and corresponds to both the first and second frequency resources.

[0088] More specifically, the first frequency resource and / or the second frequency resource may have the following characteristics in whole or in part:

[0089] (1) When performing SB-FD operation, the first frequency resource and the second frequency resource do not overlap with each other. This is to prevent DL and UL resources from being transmitted via different frequency resources. In this case, there are frequency resources that do not correspond to either the first frequency resource or the second frequency resource, and such frequency resources are called guard sub-bands or guard frequency resources. Such guard frequency resources may be necessary to reduce interference caused by DL transmission on UL reception. Such guard frequency resources may be located between the first frequency resource and the second frequency resource.

[0090] (2) When performing SS-FD operation, the first frequency resource and the second frequency resource may overlap. In this case, there may be frequency resources that do not correspond to either the first frequency resource or the second frequency resource. Such frequency resources are called guard sub-bands or guard frequency resources. Such guard frequency resources may be necessary to reduce interference caused by DL transmissions on adjacent carriers to UL reception and / or to reduce interference caused by DL transmissions on adjacent carriers to UL reception.

[0091] (3) When performing SB-FD operation, the second frequency resources may be configured as contiguous frequency resources, and the first frequency resources may be configured as discontinuous frequency resources. In this case, the first frequency resources may be configured as multiple (e.g., two) sets of contiguous frequency resources. This is to position the second frequency resources used for UL at the center of the frequency resources constituting the cell to reduce interference caused by DL transmission on adjacent carriers to the UL resources. Conversely, the first frequency resources may be configured as contiguous frequency resources, and the second frequency resources may be configured as discontinuous frequency resources. In this case, the second frequency resources may be configured as multiple (e.g., two) sets of contiguous frequency resources. This is to position the second frequency resources used for DL ​​at the center of the frequency resources constituting the cell to reduce interference caused by DL transmission on the UL resources on adjacent carriers.

[0092] (4) When performing SS-FD operation, the second frequency resource may be configured as a portion of the first frequency resource. In this case, the second frequency resource may be configured to be X PRBs less than the first frequency resource on one or both edge portions. This is to reduce interference caused by DL transmission on adjacent carriers to UL reception.

[0093] The network can determine / judge the above-mentioned "first time resource" and "second time resource" and "first frequency resource" and "second frequency resource" and provide all or part of the information to the terminal. The network performs DL transmission to the terminal in such "1-1 time resource within the first time" and "1st frequency resource within the second time resource" and performs UL reception from the terminal in such "1-2 time resource within the first time resource" and "2nd frequency resource within the second time resource."

[0094] The terminal can determine the location of the resources by receiving all or part of the information on the "first time resource" and "second time resource" and the "first frequency resource" and "second frequency resource" from the network. The terminal performs DL reception from the network via all or part of the "1-1 time resource within the first time" and the "1st frequency resource within the second time resource," and performs UL transmission to the network via the "1-2 time resource within the first time resource" and the "2nd frequency resource within the second time resource."

[0095] In existing NR TDD carriers, a gNB can only operate in either downlink or uplink in a specific time resource. In this case, the gNB always operates in downlink in the time resource in which SSB is transmitted.

[0096] For terminals operating with existing TDD, the following is assumed for the symbols on which SSB is transmitted:

[0097] (1) The SS / PBCH transmission symbol cannot be configured in the uplink by the TDD configuration (by TDD-UL-DL-ConfigCommon and / or TDD-UL-DL-ConfigDedicated).

[0098] (2) The SS / PBCH transmission symbol cannot be set in the uplink by the SFI (slot format indication) (by DCI format 2_0).

[0099] (3) When SS / PBCH is transmitted in a symbol set to flexible by the TDD configuration (by TDD-UL-DL-ConfigCommon and / or TDD-UL-DL-ConfigDedicated), if the terminal's uplink transmission overlaps with the corresponding SS / PBCH symbol, the corresponding uplink transmission will not be performed. (In the case of SRS (sounding reference signal), if the terminal overlaps with the SS / PBCH symbol in a flexible symbol, SRS transmission will not be performed in the overlapped symbol(s).)

[0100] On the other hand, in FDR environments such as SB-FD and SS-FD, both DL and UL resources can exist in the same time resource from the cell perspective, so a gNB can transmit downlink and receive uplink at the same time.

[0101] Therefore, even when the SS / PBCH is transmitted during the time resource in which the cell performs FDR operation, the gNB can perform uplink reception while transmitting the SS / PBCH.

[0102] However, in the current standard, a terminal cannot perform uplink transmission in the symbol resource where the SS / PBCH is transmitted, which means that FDR cannot be performed in the SS / PBCH transmission time resource.

[0103] TDD configuration

[0104] In existing TDD spectrum, the base station and UE are assumed to operate in half duplex (HD), and in communications between the base station and UE, the downlink, in which the base station transmits a signal to the UE and the UE receives it, and the uplink, in which the UE transmits a signal to the base station and the base station receives it, are characterized by dividing the time so that the time resources for the downlink and uplink do not overlap (also, in sidelink, in which direct communications are performed between UEs, the UE's transmission and reception times are divided). In this way, when half duplex is supported in a TDD spectrum, the base station and UE can use all frequency resources used at a specific time as downlink or uplink, but by determining which time resources to use as downlink or uplink and instructing this information to the UE, the UE can determine and operate to receive downlink signals during certain times and transmit uplink signals during other time resources. For this reason, in the case of an LTE system, all OFDM symbols in a specific time (1 ms) unit are used as Downlink (D) or Uplink (U), or a Special Slot (S) is defined so that some of the OFDM symbols included in the specific time are used as DL, other OFDM symbols are used as UL, and the rest is used as Gain Time. The base station determines D, S, or U for a specific time range, configures a TDD configuration based on this, and instructs this to the UE. For example, a configuration such as DDDSU can be instructed within a 5 ms range. The instructed TDD configuration is characterized by being commonly applied to all UEs belonging to the cell.In the case of an NR system, a TDD configuration can be configured and indicated to a UE by specifying the position of a downlink slot, a downlink OFDM symbol, a flexible slot, a flexible OFDM symbol, or an uplink slot, an uplink OFDM symbol for a specific time duration. Such configuration indication can be divided into a cell-specific TDD configuration indicated by system information, a UE-specific TDD configuration indicated by UE-specific RRC signaling, and an indicator indicated commonly to a UE group.

[0105] Recently, 3GPP has been conducting studies on Subband Full Duplex (SBFD), which divides the frequency in a single carrier into subband units and allows simultaneous transmission and reception of DL and UL at the same time at the base station end. SBFD is characterized by dividing the frequency in the time interval used for Downlink only or Uplink only in the existing Half Duplex, allowing transmission and reception in the opposite direction (Downlink and Uplink) (overlapping frequencies to transmit and receive in the opposite direction (Downlink and Uplink, or both Sidelink) can also be considered Full Duplex operation. This disclosure is assumed to be applicable not only to SB-FD but also to various Full Duplex operations).

[0106] At this time, it is assumed that the base station operates in full duplex and the UE operates in half duplex. During the initial access process, the UE acquires initial synchronization with the synchronization signal, acquires the most basic information in the base station from the PBCH, monitors the PDCCH to acquire system information, and acquires the system information via the PDSCH. The system information includes the TDD configuration commonly used by UEs in the cell. When the base station operates in full duplex, the system information can include information about full duplex operation and be instructed to the UE.

[0107] For example, for system information:

[0108] (1) Information indicating the time resources for full duplex

[0109] (2) Frequency resource information for downlink and uplink when performing full duplex

[0110] etc. can be included.

[0111] The advantage of SB-FD is that it allows the base station to use DL and UL resources more flexibly on a frequency basis. When DL traffic is relatively light, it can allocate more UL resources, and when UL coverage enhancement is required, it can allocate more UL resources for use.

[0112] However, if only the TDD configuration included in the existing system information is used, it may be difficult to utilize the advantage of SB-FD, which aims to use more UL resources.

[0113] For example, it can be assumed that a terminal is currently operating in a TDD configuration where DL occupies more time, such as DDDSU, but allows full duplex operation for some time resources in D, and specifies time resources in which full duplex operation is allowed. In this case, a terminal performing half duplex operation in time resources where full duplex operation is allowed is capable of both downlink and uplink operation, but when determining which link to operate on according to the existing TDD configuration, only downlink operation is determined.

[0114] MIMO operation

[0115] In full duplex, there can be a problem of self-interference, where the transmitting end signal is received as large interference. To solve this problem, various types of self-interference rejection / cancellation methods are used. One such method is to transmit and receive using separate transmitting and receiving antennas. Another similar method is to reduce the amount of self-interference by configuring the beams generated by the transmitting antenna and the beams generated by the receiving antenna to be orthogonal to each other.

[0116] Problem 1.

[0117] In the existing TDD half duplex scheme, transmit and receive antennas can be shared when performing DL and UL, in which case it is possible to assume that the DL and UL spatial channels are reciprocal. Taking advantage of this feature, when a UE transmits SRS on the UL, the base station can receive the SRS and select a DL transmit precoder. This ensures superior performance compared to a scheme in which the base station selects a DL transmit precoder based on information reported by the UE using CSI-RS in DL. However, in full duplex, when antennas for transmission and reception are separated to reduce self-interference, it becomes difficult to assume the reciprocity of the DL and UL channels. Furthermore, in SBFD, since transmission and reception are performed using separate frequencies for DL ​​and UL, it becomes difficult to assume channel reciprocity even when transmit and receive antennas are shared. In this case, a new method is required to select a DL precoder, either using DL CSI-RS or using SRS.

[0118] Problem 2.

[0119] In addition, the number of transmit and receive antennas for TDD half duplex transmission and reception may differ from that for full duplex transmission and reception. For example, while the number of antennas used in TDD half duplex is N, full duplex may use a smaller number of antennas (e.g., N / 2) for transmission and reception. In such cases, the type of CSI-RS port or precoder used for transmission and the maximum transmittable rank may differ in DL. Furthermore, the width of the transmission beam generated by the base station may differ, and the number of beams may also differ. When the base station receives, the antenna used in half duplex may differ from that used while performing full duplex.

[0120] Problem 3.

[0121] In half duplex, a base station can transmit signals using a wide band. However, when performing full duplex operation in which DL and UL transmissions are performed by dividing or sharing frequencies, a power density value different from the one previously used by the base station per RE can be applied. For example, if a signal is transmitted at N dBm in a W MHz transmission bandwidth and a portion of the band is used as DL to maintain N dBm transmission power, the transmission power available for each unit frequency can be greater than when using a wide band. In this case, the signal quality per unit frequency will be different from the previous one. However, if the transmission power quality changes, it is preferable that the terminal measures and reports the signal quality to select an appropriate transmission rank, MCS, etc.

[0122] CLI measurement and report

[0123] In the method for measuring UE-to-UE CLI between cells in Dynamic TDD, it is assumed that the victim UE receives and measures the aggressor UE's signal during DL reception in the active BWP. However, when the base station operates in full duplex mode, especially when it operates in full duplex mode with separate frequencies and the UE operates in half duplex mode, cross-link interference may occur between UEs in the cell. When a specific UE receives a DL signal and another UE transmits a UL signal at the same time, the UL transmission signal may be received by the other UE as an interference signal. In particular, when SB-FD is performed, a signal transmitted by one UE at a certain frequency acts as inter-subband interference, where the signal transmitted by another UE is received by another UE at a different frequency. This interference signal is a signal transmitted by a UE that has leaked into an adjacent band, making it difficult to identify the channel or signal characteristics. Therefore, it has the disadvantage of being difficult to distinguish users causing interference. A method is needed to facilitate SRS-RSRP measurement and CLI-RSSI measurement.

[0124] Additional advantages, objects, and features of the present disclosure will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the present disclosure. The objectives and other advantages of the present disclosure may be realized and attained by the structure particularly pointed out in the written description and claims hereof, as well as the appended drawings.

[0125] Detailed Description of the Invention

[0126] The configuration, operation, and other features of the present disclosure can be understood by referring to the embodiments of the present disclosure described with reference to the accompanying drawings.

[0127] FIG. 12 is a diagram showing an example of a structure in which resources operating in HD (half duplex) and resources operating in FD (full duplex) such as SB-FD or SS-FD coexist in a system applicable to the present disclosure.

[0128] This disclosure is described assuming SB-FD operation, in which a cell simultaneously performs DL and UL using different frequency resources (sub-bands) in the same time resource. However, the contents of this disclosure can also be applied to the case where a cell performs SS-FD operation.

[0129] When a cell operates in SBFD, there may be frequency resources (i.e., DL subbands and / or guard subbands) that cannot be used for UL operation within the UL BWP resources in which the terminal operates. For example, in Figure 12, BWP1 consists of only DL or UL frequency resources in the HD slot, but DL frequency resources and UL frequency resources coexist in the SBFD slot.

[0130] In existing TDD, SBFD operation can be performed in some time intervals consisting of DL or UL frequency resources (e.g., some of the DL resources, some of the time resources specified by Flexible, or both). In the time intervals where SBFD operation is allowed, the frequency resources can be referred to as DL and UL frequency resources and UL frequency resources as DL subbands and UL subbands, respectively.

[0131] As shown in Figure 12, frequency resources can be specified in BWP2 so that it can operate in either DL or UL. In this case, it is possible to operate in only DL or UL, as with existing TDD. In contrast, BWP1 is characterized by including a time interval for DL ​​only, a time interval for UL only, or a time interval in which DL subband and UL subband can be simultaneously operated. Here, some or all of the time resources for DL ​​only / UL only / SBFD (DL subband + UL subband) can be included in BWP1.

[0132] The configuration of the UL subband and DL subband / or Guard band can be indicated to the terminal from the base station via higher layer signaling (e.g., System information, RRC signaling). If guard band information is indicated, the DL subband can be inferred from the guard band and UL subband information.

[0133] For example, DL BWP and UL BWP may already have indicators indicating BW. An indicator indicating the BW of the subband may be added to this, and the common area between the DL subband / UL subband indicator indicated via the higher layer signal and the existing BW indicator can be determined as the DL subband / UL subband area of ​​the DL BWP and UL BWP. In this way, a specific BWP can be configured with two types of frequency bandwidth.

[0134] As in BWP1 in Figure 12, the UL subband of a UL BWP may exist in an area separated from the DL subband of a DL BWP. In other words, a UL BWP having a UL subband may exist outside the DL BWP having the DL subband of BWP1. In this way, a DL BWP having a DL subband and a UL BWP having a UL subband can be configured as one BWP pair.

[0135] There may be a DL BWP / UL BWP, such as BWP2 in Figure 12, with BWP1 in an adjacent band. The UL subband of BWP1 may exist in a frequency adjacent to or somewhat distant from the DL region of DL BWP2.

[0136] A terminal that can know the SBFD operation of a base station recognizes that the base station will perform SBFD operation in a specific time resource when the subband configuration for SBFD operation and the time resource for SBFD operation are specified, and can operate assuming that the configuration of the information additionally indicated for SBFD operation (e.g., Frequency resource allocation, UE Tx power control, gNB Tx power, UE TX Timing, SRS / PUCCH / PUSCH, Frequency hopping, CSI-RS configuration, CSI reporting, MIMO configuration, BWP, CG PUSCH, PUSCH repetition, RACH Occasion, etc.) is used in that time resource.

[0137] Embodiment 1: TDD resource configuration method and transceiver operation for full duplex support

[0138] Proposal 1-1. In addition to the existing cell-specific TDD configuration (TDD UL / DL Configuration Common), indicate a new cell-specific TDD configuration that can be interpreted by UEs with new capabilities.

[0139] The existing TDD configuration can be used for Legacy UE.

[0140] A UE that knows that the base station performs FD operation and has new capability to use time / frequency / space resources according to FD operation may follow either the existing TDD configuration or the new TDD configuration. To this end, the base station may allow the UE to select or may instruct the UE to use a specific TDD configuration.

[0141] (1) When the UE selects a TDD configuration, the UE must report the selected TDD configuration to the base station. To do this, the base station can allocate a separate RACH resource. A UE that selects that RACH resource and performs the RACH procedure can be considered to have selected a new TDD configuration. Thereafter, for PDCCH monitoring and msg2 PDSCH, msg3 PUSCH, and msg4 PDSCH-PUCCH, the RACH procedure can be performed in the new TDD configuration and the half-duplex frequency resources and the time / frequency resources indicated for full duplex. Thereafter, operation in the initial BWP can also be performed in this manner.

[0142] (2) The UE can be instructed to use a specific TDD configuration. It is possible to specify which configuration to use between an existing TDD configuration and a new TDD configuration. For example, it is possible to specify a TDD configuration for each BWP.

[0143] (3) To force the UE to use only a specific TDD configuration, the UE can be instructed to operate only with the specific TDD configuration regardless of BWP if the UE selects the specific TDD configuration or is instructed to do so. Even if a TDD configuration is specified for each BWP, the TDD configuration to be used can be determined by default if the TDD configuration to be used in BWP is not instructed.

[0144] When a new Cell specific TDD configuration is specified, the method to update it is as follows:

[0145] (1) When a new cell-specific TDD configuration is indicated, when updating the TDD configuration to a UE-specific TDD configuration or SFI, an indicator may be included indicating whether to update the existing TDD configuration (from a previous release) or the new TDD configuration.

[0146] (2) Alternatively, if a new cell-specific TDD configuration is indicated, the TDD configuration can be updated according to the new UE-specific TDD configuration.

[0147] The procedure for configuring a new Cell Specific TDD configuration is as follows:

[0148] (1) A new Cell Specific TDD configuration can be specified independently. The duration of the configuration may be different from that of the existing one. If no duration is specified, it may be the same as that of the existing cell specific TDD configuration.

[0149] (2) The new Cell Specific TDD configuration can specify whether the time resources specified as Full Duplex operation are Downlink or Uplink in the existing TDD configuration, or the new Cell Specific TDD configuration can specify D, F, or U separately from the existing TDD configuration.

[0150] (3) If no reference SCS is given for a new Cell Specific TDD configuration, the reference SCS may follow that of the existing cell specific TDD configuration.

[0151] The base station can indicate to the terminal the time resources on which the base station can perform the SBFD operation. When the base station indicates to the terminal the time resources on which the base station can perform the SBFD operation, the terminal assumes that the base station is performing the SBFD operation and can perform DL reception or UL transmission in the subband DL / subband UL region, respectively. The indicator of the time resources on which the base station can perform the SBFD operation can be delivered to the terminal in Cell Specific Configuration, but in particular, can be delivered via Higher Layer Signaling including System Information. For example, the indicator of the time resources on which the base station can perform the SBFD operation can also be delivered via UE RRC Signaling.

[0152] The system information may include a cell-specific TDD configuration. SBFD operation can be instructed in time resources designated as DL or Flexible in the cell-specific TDD configuration. For UL time resources, the terminal is conventionally configured to transmit at a lower power than the base station. However, if the base station performs DL transmission at high power in UL time resources, it may generate interference signals with a significant power in neighboring cells, so instructing SBFD operation in UL time resources is not desirable.

[0153] If a base station is instructed to perform SBFD operation in some or all resources in the DL or Flexible region in an existing TDD configuration, it can be assumed that a terminal can perform DL reception or UL transmission in the time resources for which the base station is instructed to perform SBFD operation. Conventionally, in the case of a half-duplex base station, DL transmission is performed in the DL region in a TDD configuration, so a terminal expects DL reception, but in the time resources for which the base station is instructed to perform SBFD operation, a terminal can perform not only DL but also UL transmission.

[0154] In the Flexible region, a UE is basically capable of DL reception, but the UE can also perform UL transmission as instructed by the base station. The UE can perform DL reception or UL transmission depending on the indicator, which can also indicate DL or UL resources in the Flexible resource. If the base station is instructed to perform SBFD operation in the Flexible region, the UE is expected to perform at least subband UL transmission in the time resources in which the base station performs SBFD operation, and the UE is also capable of wideband UL transmission. However, if the base station is instructed to perform SBFD operation in the Flexible region and UL is subsequently specified in a configuration such as a UE RRC signal or SFI, the UE can assume that the base station will perform existing half-duplex UL reception or that the base station will perform existing half-duplex wideband UL transmission. The UE can also not expect the base station to perform full-duplex subband UL reception operation, or the UE can not expect the base station to perform subband UL transmission operation. The terminal may expect the base station not to perform full duplex subband UL reception operation, or the terminal may expect the base station not to perform subband UL transmission operation.

[0155] When a time resource in which the base station can perform full duplex operation is indicated to a terminal and a RACH configuration that enables RACH transmission through the time resource in which the base station can perform full duplex operation is indicated to the terminal, the terminal can perform RACH transmission in the full duplex UL frequency region. If an indicator of a time region in which the base station can perform full duplex operation is transmitted to the terminal in addition to the existing TDD configuration, the terminal can selectively perform DL reception or UL transmission in the time region in which the base station can perform full duplex operation unless an additional TDD configuration is indicated. For example, when the terminal performs RACH transmission, the terminal can perform RACH transmission using a RACH occasion defined in a UL frequency resource included in a full duplex time resource that is at least several symbols after DL reception. If the terminal transmits RACH on a UL frequency resource included in a full duplex time resource, the terminal can retransmit a RACH preamble through the RACH occasion specified in the RACH configuration when performing a retransmission.

[0156] If the base station instructs the terminal on time resources for performing full duplex and the terminal performs RACH operation in the time resources for performing full duplex, the terminal may be instructed on RACH occasion information, or whether or not PDCCH monitoring and PDSCH frequency resources for msg2 RAR reception are specified (DL subband of SBFD slot, DL frequency resource for non-SBFD), or frequency interval for msg3 PUSCH transmission (UL subband of SBFD slot, UL frequency resource for non-SBFD), or frequency resources for PDCCH monitoring and msg4 PDSCH reception, or frequency location or PUCCH resource for PUCCH transmission for msg4 PDSCH.

[0157] Alternatively, the base station may instruct a terminal that is aware of and capable of performing full duplex operation of the base station to transmit a preamble of a part of the existing RACH occasion, and the base station may allow the terminal to transmit the RACH preamble.

[0158] If a terminal transmits a RACH preamble using a RACH occasion designated in a full duplex time resource or a terminal transmits a RACH preamble designated as part of an existing RACH occasion, the terminal may perform PDCCH monitoring for RAR reception in a time resource in which the base station can perform full duplex or half duplex. When a time resource for msg3 PUSCH transmission is designated in the RAR message, the terminal follows the indicator for full duplex in a method in which the base station indicates the UL hopping or UL transmission frequency resource location to the terminal in a time resource in which the base station can perform SBFD operation according to the location of the time resource, and in non-SBFD time resources, the terminal may interpret and transmit according to the existing indicator. In the case of Msg4 PDSCH, depending on whether the base station can perform full duplex or half duplex operation for PUCCH transmission for msg4 PDSCH, the terminal may receive and transmit according to the time resource taking into account additional information related to the frequency domain / antenna information / UL hopping and full duplex, depending on whether the base station can perform full duplex or half duplex operation.

[0159] FIG. 13 is a diagram illustrating an example of information indicating downlink resources and uplink resources based on antenna configuration in a system applicable to the present disclosure.

[0160] Embodiment 2: MIMO technology and transceiver operation for supporting half duplex and full duplex

[0161] When a base station performs full duplex (SBFD or SSFD), it can use antennas dedicated to each link direction to simultaneously perform DL transmission and UL reception. For this purpose, at least two separate antennas, antenna sets, panels, etc. can be used. At a particular time, only DL transmission or only UL reception can be performed. In this case, the base station can use some antennas, antenna sets, or panels out of at least two separate antennas, antenna sets, or panels. Alternatively, the base station can transmit or receive using all antennas, antenna sets, or panels. Alternatively, the base station can simultaneously perform DL / UL using the same antenna. If a terminal supports full duplex operation, separate antennas are used for DL ​​reception and UL transmission, or both DL reception and UL transmission can be performed using a single antenna.

[0162] A base station that supports full duplex operation notifies a terminal that knows whether the base station is capable of full duplex operation via a higher layer signal (e.g., system information, RRC signal, etc.) whether the base station is capable of full duplex operation. When the base station notifies a terminal whether full duplex operation is possible, additional information used for full duplex operation can be transmitted to the terminal. For example, CSI-RS configuration, SRS configuration, frequency hopping, MIMO configuration (number of antennas, codebook, etc.), DL Tx power information, etc. are additionally indicated to the terminal. For a user in the RRC CONNECTED state, each piece of information can be additionally indicated in the configuration including DL / UL configuration, etc.

[0163] In addition, the base station may transmit time information for performing full duplex operation to the terminal. Having received the time information for performing full duplex operation, the terminal determines that the base station will perform full duplex operation in the designated time resource and can receive a DL signal or transmit a UL signal using the time information for performing full duplex operation.

[0164] Proposal 2-1. DL signal and UL SRS transmission resources

[0165] The base station distinguishes and instructs the UE about information on signals to be received or transmitted in a specific time interval (e.g., a time interval in which half duplex is possible or a time interval in which full duplex is possible), or instructs the UE about information constituting a DL signal or UL SRS used only in the half duplex time interval, a DL signal and / or a UL signal used in the half duplex time interval and the full duplex time interval, or a DL signal and / or a UL signal used in the full duplex time interval, etc.

[0166] In half-duplex time intervals, the base station specifies the source of the TCI-state from among the candidate reference signals that can be used in that time interval, and in full-duplex time intervals, the base station specifies the source of the TCI-state from among the candidate reference signals that can be used in that time interval.

[0167] Figure 13 shows an example of SBFD in which frequency resources are divided (F1, F2) and used for DL ​​and UL purposes, where multiple antennas (A1, A2) are used for each frequency and direction when each frequency resource is used for DL ​​only (DD), when it is used for DL ​​only (UU), and when it is used separately for DL ​​and UL ((DU) or (UD)).

[0168] The information in FIG. 13 may, for example, indicate that one of the following actions should be performed:

[0169] (Operation 1) Antenna 1 (A1) DL only (DD) on both F1 and F2

[0170] (Operation 2) UL only (UU) on both F1 / F2 at Antenna 1 (A1)

[0171] (Operation 3) Antenna 2 (A2) DL only (DD) in both F1 and F2

[0172] (Operation 4) Antenna 2 (A2) UL only (UU) on both F1 / F2

[0173] (Operation 5) Antenna 1 (A1) DL at F1, Antenna 2 (A2) UL at F2

[0174] (Operation 6) DL at F1 with Antenna 2 (A2), DL at F2 with Antenna 1 (A1)

[0175] When a base station performs half duplex (Operation 1) and uses only Antenna 1 (Operation 2), or when a base station performs full duplex (Operation 5) and performs F1 DL on Antenna 1 and F2 UL on Antenna 2, the DL on Antenna 1 F1 in full duplex (Operation 5) can assume the same channel reciprocity as the UL on Antenna 1 F1 in half duplex (Operation 2).

[0176] On the other hand, in full duplex, it is difficult to assume reciprocity for the UL of Antenna 2 F2 in (Operation 5) with either the DL in (Operation 1) or (Operation 2).

[0177] The advantage of TDD is that it utilizes the reciprocity characteristics of the DL and UL channels to obtain spatial information from the signal received in the UL and calculate and apply the beamforming weight for DL ​​transmission. However, in this case, it becomes difficult to use DL transmission using the A2 UL signal (Operation 5) in full duplex.

[0178] Another advantage of TDD is that the UE can find a suitable reception beam for DL ​​reception while receiving a DL signal and use the DL and UL reciprocity characteristics to determine the UL transmission beam. DL reception is based on a reference signal such as SSB / PBCH or CSI-RS. When an SRS is transmitted using the UE's Rx beam obtained based on that reference signal, the Tx beam information used in that SRS can be used to transmit other UL signals. However, in full duplex, when the UE transmits UL in F2 (Operation 5), the base station antenna A2 that receives UL and antenna A1 that transmits DL are different, making it difficult for the UE to estimate the reciprocity between the DL and UL signals.

[0179] We previously discussed DL-only or UL-only using one of the A1 and A2 antennas. However, when both A1 and A2 are used for DL-only transmission and UL-only reception, even when one of A1 and A2 is used for DL ​​and one for UL, it can be difficult to achieve reciprocity. To solve this problem, when performing DL-only or UL-only with a specific antenna in half-duplex, (1) A1 DL-only transmission and UL-only reception and (2) A2 DL-only transmission and UL-only reception are possible. In full-duplex, (3) A1 DL transmission and A2 UL reception and (4) A1 UL reception and A2 DL transmission are both possible. As a result, in half-duplex A2 DL-only transmission, full-duplex A2 UL reception is performed, ensuring reciprocity between the two. The same applies to other cases. For this operation, the base station needs to inform the terminal of the specific mapping relationship between the source resource of the TCI-state and a specific SRS.

[0180] Proposal 2-2.TCI state or SRI instruction

[0181] When there are multiple TCI states or SRIs, the base station configures the TCI states or SRIs to be used in full duplex-capable time resources and instructs the UE. In particular, when transmission and reception are instructed via one resource indicator such as repeated transmission or configured grant and transmission and reception are performed over several hours, information such as the TCI states or SRIs to be used in half duplex-capable time resources and full duplex-capable time resources is configured and instructed to the UE, and the UE performs transmission and reception according to the information.

[0182] Proposal 2-3.Antenna configuration

[0183] The base station additionally indicates an antenna configuration or a MIMO-related configuration, as in the embodiment of Figure 13. The additionally indicated configuration can be specified in which time resource it is to be used. Alternatively, if there is an indicator indicating that the time resource is full duplex-capable, the UE assumes that it can be used in the time resource specified by that indicator.

[0184] Proposal 2-4. DL Power

[0185] The base station indicates to the UE the value of DL power in the time resources used for SBFD. The instruction for DL ​​power can be indicated in various ways. For example, it can indicate the power difference compared to the transmission power of a specific signal (e.g., SSB or CSI-RS).

[0186] However, when the base station indicates additional information related to DL transmission to the UE in this manner, it can be assumed that this power value will be used in the frequency resource for DL ​​of the time resource indicated when SB-FD is applied.

[0187] FIG. 14 is a diagram showing an example of a separate-Tx / Rx antenna array model in a system applicable to the present disclosure.

[0188] FIG. 15 is a diagram showing an example of (a) Legacy TDD with shared-Tx / Rx Antenna array in a system applicable to the present disclosure.

[0189] FIG. 16 is a diagram showing an example of (b) SBFD Antenna configuration Option-1 (Method 1) in a system applicable to the present disclosure.

[0190] FIG. 17 is a diagram showing an example of (c) SBFD Antenna configuration Option-2 (Method2-1) in a system applicable to the present disclosure.

[0191] FIG. 18 is a diagram showing an example of (d) SBFD Antenna configuration Option-2 (Method2-2) in a system applicable to the present disclosure.

[0192] FIG. 19 is a diagram showing an example of (e)SBFD Antenna configuration Option-3 (Method3-1) in a system applicable to the present disclosure.

[0193] FIG. 20 is a diagram showing an example of (f) SBFD Antenna configuration Option-3 (Method3-2) in a system applicable to the present disclosure.

[0194] 15 to 20 illustrate examples of antenna configurations of legacy TDD and SBFD.

[0195] The following is part of the content of 3GPP TR38.858 v1.0.0 (September 2023).

[0196] TR38.858 v1.0.0 (2023.9)

[0197] 6.1.2Impact and potential enhancements for transmissions and receptions

[0198] Impact and potential enhancements for UL transmissions and DL receptions across SBFD symbols and non-SBFD symbols, including at least the following, are studied:

[0199] - PDCCH, scheduled / configured PUCCH / PUSCH / PDSCH, without repetition in SBFD symbols and non-SBFD symbols

[0200] - Scheduled / configured SRS / CSI-RS in SBFD symbols and non-SBFD symbols

[0201] - Scheduled / configured TBoMS across SBFD symbols and non-SBFD symbols with or without repetition

[0202] - Multi-PUSCH / PDSCH scheduled by a single DCI in SBFD symbols and non-SBFD symbols

[0203] - Scheduled / configured PDSCH / PUSCH / PUCCH with repetitions across SBFD symbols and non-SBFD symbols

[0204] Note:Inter-slot / intra-slot / inter-repetition / inter-group frequency hopping with DMRS bundling of PUSCH / PUCCH, if applicable, is considered.

[0205] Examples of potential enhancements include:

[0206] - Resource allocation in frequency domain including frequency hopping

[0207] - Resource allocation in time domain

[0208] - Power domain

[0209] - Spatial domain

[0210] RAN1 studied the impact and benefits of potential enhancements to resource allocation in frequency-domain for SBFD operation, considering unaligned boundaries between resource block group(s) / reporting subband(s) and SBFD subbands, including at least the following:

[0211] - RBG for PDSCH RA type 0

[0212] - CSI reporting configuration

[0213] - CSI-RS resource configuration

[0214] - PRG of PDSCH

[0215] For resource allocation in frequency-domain in case of unaligned boundaries between RBG and SBFD subbands, RAN1 studied whether or not the part of the DL RBG inside / outside the DL subband and the part of the UL RBG inside / outside the UL subband can be used. It is agreed that for SBFD-aware UEs, the part of the DL RBG inside the DL subband can be used and the part of the UL RBG inside the UL subband can be used for better resource utilization. It is agreed that the part of the RBG outside the DL subband cannot be used for DL reception and the part of the RBG outside the UL subband cannot be used for UL transmission at least for semi-static SBFD.

[0216] For semi-static SBFD, for a CSI reporting subband which overlaps with SBFD subband boundaries, it is agreed that CSI report is derived based on CSI-RS resources excluding CSI-RS resources outside DL subband(s) for SBFD-aware UE.

[0217] For semi-static SBFD, for a CSI-RS resource which overlaps with SBFD subband boundaries, it is agreed that only CSI-RS resources within DL subband(s) are valid for SBFD-aware UE.

[0218] For SBFD-aware UEs, at least the following issues for PDSCH are studied:

[0219] PRG(s) with size of 2 and 4 that overlaps with subband boundary

[0220] Wideband precoder in case of non-contiguous DL subbands

[0221] For a PRG that overlaps with subband boundary, if the part of DL PRG inside the DL subband can be used, better scheduling flexibility and resource utilization can be achieved, however degraded channel estimation quality in the partial PRG is expected compared to a PRG due to limited RBs in the partial PRG. It is noted that UE complexity could increase if this feature is supported.

[0222] If PRG is determined as wideband, the following two options are studied.

[0223] Option 1: non-contiguous frequency resources across two DL subbands but contiguous frequency resource within each DL subband can be allocated

[0224] Option 2: non-contiguous frequency resources across two DL subbands cannot be allocated

[0225] It is agreed that Option 1 can achieve better scheduling flexibility and higher DL data rate. Compared with Option 2, Option 1 requires UE to handle two non-contiguous segments of contiguous RBs that may increase UE complexity for channel estimation.

[0226] Frequency resource allocation for CSI-RS across downlink subbands for SBFD-aware UEs are studied considering the following options:

[0227] - Option 1: Two contiguous CSI-RS resources that are linked

[0228] - Option 2: One CSI-RS resource

[0229] - Option 2-1: Non-contiguous CSI-RS resource allocation

[0230] - Option 2-2: One contiguous CSI-RS resource allocation with non-contiguous CSI-RS resource derived by excluding frequency resources outside DL subband (s)

[0231] For all the options, there is no impact on CSI-RS sequence generation. Option 1 requires additional signalling to link two CSI-RS resources in two DL subbands. Option 2-1 requires new RRC structure to configure non-contiguous RBs for one CSI-RS resource, which may require additional signalling overhead. Option 2-2 can reuse the existing signalling design for CSI-RS resource configuration. Option 2-2 can be used to resolve the potential unaligned boundaries between CSI-RS resource configuration and SBFD subbands. Further discussion is required on the UE complexity due to UE capability of maximum number of configured CSI-RS resources and / or processing non-contiguous CSI-RS.

[0232] For UL transmissions and DL receptions across SBFD symbols and non-SBFD symbols in different slots (each transmission / reception within a slot has either all SBFD or all non-SBFD symbols), the following options are studied for SBFD-aware UEs:

[0233] - Option 1: The transmissions / receptions are restricted to SBFD symbols only or non-SBFD symbols only

[0234] - Option 2: The transmissions / receptions can be in SBFD symbols and non-SBFD symbols

[0235] UL transmissions and DL receptions across SBFD symbols and non-SBFD symbols include the following:

[0236] - PDSCH / PUSCH / PUCCH repetitions

[0237] - SPS PDSCH / CG PUSCH

[0238] - TBoMS

[0239] - Multi-PUSCH / PDSCH scheduled by a single DCI

[0240] - Periodic / semi-persistent SRS / CSI-RS / PUCCH

[0241] - PDCCH

[0242] Option 1 can be achieved by gNB configuration or scheduling to ensure that all transmission / reception occasions are confined to either SBFD symbols or non-SBFD symbols. Alternatively, Option 1 can be achieved by additional indication or rules to determine the transmission / reception occasions are valid within one symbol type and are invalid within the other symbol type. The frequency resources, power control and beam / spatial relation for all the transmission / reception occasions can be the same for Option 1 but may be different for Option 2. If different, it may require additional specification efforts. Option 1 may or may not increase the transmission / reception latency if the transmission / reception in the other symbol type is postponed and may degrade the performance if the transmission / reception in the other symbol type is dropped. Option 2 may or may not reduce the transmission / reception latency and improve coverage.

[0243] For UL transmissions and DL receptions across SBFD symbols and non-SBFD symbols in different slots (each transmission / reception within a slot has either all SBFD or all non-SBFD symbols), if the transmissions / receptions can be in SBFD symbols and non-SBFD symbols with different available resources, at least the following frequency resource allocation options for PDSCH, CSI-RS, PUSCH, PUCCH, SRS for SBFD-aware UE are studied.

[0244] Option 1: Separate FDRA determination for SBFD slots and non-SBFD slots.

[0245] Option 1-1: Separate FDRA configurations / indications for SBFD slots and non-SBFD slots

[0246] Option 1-2: Separate frequency resources determined for SBFD slots and non-SBFD slots based on single FDRA configuration / indication

[0247] Option 1-3: single FDRA configuration / indication and RB offset(s)

[0248] Option 2: Perform rate matching or puncturing on the RBs outside DL / UL subbands for DL / UL channels / signals.

[0249] Option 3: A DL / UL channel / signal overlapping with RBs outside DL / UL subbands in a SBFD slot is dropped or postponed.

[0250] Note: Different options can be studied for different signals / channels.

[0251] RAN1 studied whether the transmission / reception occasion of a physical channel / signal can be mapped to SBFD and non-SBFD symbols within a slot for a UE, and whether a UE can transmit / receive in the occasion mapped to SBFD symbols and non-SBFD symbols including:

[0252] - Use-case(s) including the locations and number of transition points of the SBFD and non-SBFD symbols in the slot.

[0253] - Potential benefits if any

[0254] - Phase continuity

[0255] - Potential interruption of transmissions / receptions during transition

[0256] - Required guard time if any

[0257] - Potential impact on performance

[0258] - Impact on link adaptation, channel estimation, and other procedures

[0259] - UL transmission timing if any

[0260] - Implementation complexity

[0261] - Applicability for SBFD aware UE and non-SBFD aware UEs

[0262] - NOTE: There are more than one scenario where a transmission overlaps SBFD and non-SBFD symbols and some may or may not face the aspects listed above

[0263] - NOTE: This study doesn’t mean RAN1 agreement on a slot consisting of SBFD and non-SBFD symbols.

[0264] For a physical channel / signal occasion mapped to SBFD and non-SBFD symbols within a slot if any, the following options for UE transmission / reception can be considered in the normative stage.

[0265] Option 1: UE does not transmit or receive the physical channel / signal within the slot.

[0266] Option 2: UE can transmit or receive the physical channel / signal within the slot only under certain conditions.

[0267] The conditions may depend on at least the following: whether or not phase continuity can be maintained across SBFD and non-SBFD symbols, whether or not there are same or different transmission / reception parameters e.g. power control, spatial / QCL, UL timing etc. applied in SBFD and non-SBFD symbols, and whether or not there is a guard period between the SBFD and non-SBFD symbols, etc.

[0268] Other options are not precluded.

[0269] For SBFD-aware UEs, the following options are studied for CSI report associated with periodic / semi-persistent CSI-RS, in case the periodicity is such that CSI-RS instances occur in both SBFD symbols and non-SBFD symbols in different slots (each CSI-RS resource within a slot has either all SBFD or all non-SBFD symbols):

[0270] Option 1: two CSI-ReportConfigs, where one is associated with SBFD symbols and the other is associated with non-SBFD symbols

[0271] Option 1-1: One CSI-ReportConfig is associated with a CSI-RS restricted to SBFD symbols only and the second CSI-ReportConfig is associated with a second CSI-RS restricted to non-SBFD symbols only;

[0272] Option 1-2: Both CSI-ReportConfigs are associated with the same CSI-RS. The CSI report associated with one CSI-ReportConfig is derived based on CSI-RS instances in SBFD symbols only. The CSI report associated with the second CSI-ReportConfig is derived based on CSI-RS instances in non-SBFD symbols only.

[0273] Option 2: one CSI-ReportConfig associated with both SBFD symbols and non-SBFD symbols

[0274] Option 2-1: One CSI-ReportConfig is associated with two CSI-RSs which are restricted to SBFD symbols and non-SBFD symbols respectively. Separate CSI measurements are derived based on the first and second CSI-RSs respectively.

[0275] Option 2-2: One CSI-ReportConfig is associated with one CSI-RS. The CSI report is derived based on CSI-RS which can be in SBFD symbols or non-SBFD symbols in different time instances.

[0276] Note that whether the CSI-RS resource can be used for SBFD and non-SBFD symbols may depend on, e.g., gNB implementation of same / different antenna configuration in both symbols.

[0277] Option 1-1 can be supported according to existing specification by gNB configuration of appropriate periodicities to ensure that the CSI-RS associated with each CSI-ReportConfig is confined to either SBFD symbols or non-SBFD symbols only. But it may restrict the gNB configuration flexibility and enhancements can be considered by additional indication or rules to determine the CSI-RS is valid within one symbol type and is invalid in the other symbol type.

[0278] Option 2-2 can be supported according to existing specification to configure measurement restriction so that UE would not average CSI measurements across SBFD and non-SBFD symbols.

[0279] For SRS, PUCCH and PUSCH on SBFD symbols and non-SBFD symbols in different slots, it may be beneficial to have separate resources, FH parameters, UL power control parameters and / or beam / spatial relation.

[0280] gNB can configure a CORESET and a search space in a way such that the MOs of the search space occur in either SBFD or non-SBFD symbols, or the MOs of the search space occur in both SBFD and non-SBFD symbols but the associated CORESET does not overlap the boundary of a DL subband in SBFD symbols.

[0281] If it is agreed to be beneficial that a CORESET and a search space are configured that the MOs of the search space occur in both SBFD and non-SBFD symbols and the associated CORESET overlaps the boundary of a DL subband in SBFD symbols, at least the following options can be considered for SBFD-aware UE:

[0282] Option 1: Separate valid resources for the CORESET in SBFD symbols and in non-SBFD symbols.

[0283] Option 2: Rate matching or puncturing on the REG(s) of a PDCCH outside DL subband(s).

[0284] Option 3: UE does not monitor a PDCCH candidate if it is mapped to one or more REs that overlap with REs outside DL subband(s).

[0285] Option 4: Drop search space(s) when the associated CORESET overlaps with RBs outside DL subband(s)

[0286] Option 5: Separate search spaces associated with a CORESET in SBFD and non-SBFD symbols

[0287] Note: These options are applicable to at least USS.

[0288] 7.2 Evaluation methodologies

[0289] 7.2.1System level simulation

[0290] gNB Antenna configuration

[0291] The detailed gNB antenna configurations for SBFD evaluation can be found in Annex A.5.

[0292] Annex A.5

[0293] A.5 gNB antenna configuration and transmit power for SBFD

[0294] For evaluation of legacy TDD operation, BS uses the same antenna array for downlink transmission and uplink reception, we can call it shared-Tx / Rx antenna array for description of evaluation assumption. For evaluation of SBFD operation, BS uses separate panels for simultaneous downlink transmission and uplink reception, we can call it separate-Tx / Rx antenna array for description of evaluation assumption.

[0295] The separate-Tx / Rx antenna array for description of evaluation assumption can be modelled by two panel groups as in Figure 14(図14).

[0296] JPEG2025532944000006.jpg17152

[0297] - M: Number of vertical antenna elements within a panel, on one polarization

[0298] - N: Number of horizontal antenna elements within a panel, on one polarization

[0299] - P: Number of polarizations

[0300] JPEG2025532944000007.jpg11129

[0301] JPEG2025532944000008.jpg11118

[0302] JPEG2025532944000009.jpg11158

[0303] JPEG2025532944000010.jpg13154

[0304] JPEG2025532944000011.jpg16163

[0305] JPEG2025532944000012.jpg16160

[0306] JPEG2025532944000013.jpg11124

[0307] For evaluation and comparison between SBFD and legacy TDD, three options can be used.

[0308] - SBFD antenna configuration option-1: The total number of antenna elements of the antenna array for SBFD is the same as the total number of antenna elements of the antenna array for legacy TDD. The total number of TxRUs of the antenna array for SBFD is the same as the total number of TxRUs of the antenna array for legacy TDD.

[0309] - SBFD antenna configuration option-2: The total number of antenna elements of the antenna array for SBFD is two times of the total number of antenna elements of the antenna array for legacy TDD. The total number of TxRUs of the antenna array for SBFD is the same as the total number of TxRUs of the antenna array for legacy TDD.

[0310] - SBFD antenna configuration option-3: The total number of antenna elements of the antenna array for SBFD is the same as the total number of antenna elements of the antenna array for legacy TDD. The total number of TxRUs of the antenna array for SBFD is half of the total number of TxRUs of the antenna array for legacy TDD.

[0311] These options are further clarified with examples in the following:

[0312] JPEG2025532944000014.jpg26163

[0313] JPEG2025532944000015.jpg42162

[0314] - Method 1 (see Figure 16(図16)):

[0315] - In DL slots, L / 2 antenna elements on panel group#1 are connected to K / 2 Tx chains in TxRU group#1, and L / 2 antenna elements on panel group#2 are connected to K / 2 Tx chains in TxRU group#2.

[0316] - 在UL时隙中,面板组#1上的L / 2个天线元件连接到TxRU组#1中的K / 2个接收链,面板组#2上的L / 2个天线元件连接到TxRU组#2中的K / 2个接收链。

[0317] - 在SBFD时隙中,面板组#1上的L / 2个天线元件连接到TxRU组#1中的K / 2个发射链,面板组#2上的L / 2个天线元件连接到TxRU组#2中的K / 2个接收链。

[0318] JPEG2025532944000016.jpg41161

[0319] - 方法2-1(见图17(Figure 17)):

[0320] - 在下行链路(DL)时隙中,面板组#1上的L个天线元件连接到K个发射链。

[0321] - 在上行链路(UL)时隙中,面板组#2上的L个天线元件连接到K个接收链。

[0322] - 在SBFD时隙中,面板组#1上的L个天线元件连接到K个发射链,面板组#2上的L个天线元件连接到K个接收链。

[0323] - Method 2-2 (see Figure 18):

[0324] - In DL slots, L antenna elements on panel group#1 are connected to K Tx chains.

[0325] - In UL slots, L antenna elements on panel group#1 are connected to K Rx chains.

[0326] - In SBFD slots, L antenna elements on panel group#1 are connected to K Tx chains, and L antenna elements on panel group#2 are connected to K Rx chains.

[0327] JPEG2025532944000017.jpg43163

[0328] - Method 3-1 (see Figure 19):

[0329] - In DL slots, L / 2 antenna elements on panel group#1 are connected to K / 2 Tx chains.

[0330] - In UL slots, L / 2 antenna elements on panel group#2 are connected to K / 2 Rx chains.

[0331] - 在SBFD时隙中,面板组#1上的L / 2个天线元件连接到K / 2个发射链,面板组#2上的L / 2个天线元件连接到K / 2个接收链。

[0332] - 方法3-2(见图20(Figure 20)):

[0333] - 在下行链路时隙中,面板组#1上的L / 2个天线元件连接到TxRU组#1中的K / 2个发射链。

[0334] - 在上行链路时隙中,面板组#1上的L / 2个天线元件连接到TxRU组#1中的K / 2个接收链。

[0335] - 在SBFD时隙中,面板组#1上的L / 2个天线元件连接到TxRU组#1中的K / 2个发射链,面板组#2上的L / 2个天线元件连接到TxRU组#1中的K / 2个接收链。

[0336] 对于SBFD评估,假设最大基站发射功率与用于传输的发射链数量成正比

[0337] - 对于SBFD天线配置选项-1,

[0338] - in DL-only symbols, the maximum BS transmit power for SBFD is the same as that for legacy TDD

[0339] - in SBFD symbols, the maximum BS transmit power for SBFD is half of that for legacy TDD

[0340] - For SBFD antenna configuration Option-2, in both DL-only symbols and SBFD symbols, the maximum BS transmit power for SBFD is always the same as that for legacy TDD

[0341] - For SBFD antenna configuration Option-3, in both DL-only symbols and SBFD symbols, the maximum BS transmit power for SBFD is always half of that for legacy TDD

[0342] For BS transmit power for SBFD, take Option-1 as baseline. Option-2 can also be evaluated.

[0343] - Option-1: Power boosting is not assumed for SBFD symbols compared to DL-only symbols (as in legacy systems), i.e., BS transmit power spectrum density per Tx chain is kept the same for SBFD symbols and DL-only symbols

[0344] - Option-2: Power boosting is assumed for SBFD symbols compared to DL-only symbols, i.e.,

[0345] - DL symbols in SBFD operation have the same PSD as used in TDD DL symbols

[0346] - For SBFD symbols, its PSD is scaled according to the number of RBs in DL subband(s), e.g.,

[0347] JPEG2025532944000018.jpg12137

[0348] JPEG2025532944000019.jpg15158

[0349] JPEG2025532944000020.jpg17159

[0350] JPEG2025532944000021.jpg16161

[0351] Embodiment 3: Intra-cell UE-to-UE CLI measurement and reporting method for full duplex support

[0352] In a time resource designated for SBFD operation, a user can transmit a UL signal in the UL subband, and another user can receive a DL signal in the DL subband. When a base station simultaneously performs DL and UL in the DL subband and the UL subband, a UL signal transmitted by a user in the UL subband can also be received in the DL subband of another user.

[0353] When the DL subband and UL subband are both included in the frequency band for DL ​​only, as in BWP1 in Figure 12, a user performing SBFD can receive a DL signal in the DL subband and at the same time receive a signal in the UL subband.

[0354] Alternatively, in BWP1 and BWP2 of FIG. 12, one user can transmit a UL signal in the UL subband of BWP1, and another user can receive a DL signal in the DL frequency domain for the DL BWP of BWP2.

[0355] In this case, the signal transmitted in the UL subband can cause interference to users receiving the DL signal in the adjacent DL frequency region, which is called intra-cell inter-subband cross link interference (CLI).

[0356] Proposal 3-1. SRS measurement band specification

[0357] If the base station allows a UE to receive DL signals during an SBFD-enabled time period, and if the UE is configured with inter-subband UE-to-UE CLI measurement in that time resource, it can perform inter-subband UE-to-UE CLI measurement in the UL subband frequency band beyond the BW interval of the DL subband of the DL BWP. In particular, if the UE is instructed to perform SRS-RSRP measurement, the UE receives SRS signals from other UEs at the instructed SRS transmission frequency to measure signal quality. In this case, the base station configures a measurement gap or downlink rate-matching resource for the UE so that the UE does not receive DL signals during the SRS signal quality measurement time period, or allows the UE to select DL signal reception or SRS measurement execution according to the priority of the type of DL received signal. The measurement gap can also be expressed as a downlink rate-matching resource.

[0358] The base station may provide the UE with a specific user ID or SRS resource ID information, and may also indicate an indicator indicating that the SRS resource belongs to a user in the same cell, or a measurement resource or resource set for measuring users in the same cell.

[0359] The measured value may differ from the inter-subband emission value. When reporting the measured value, the base station can instruct the UE to correct the value by a certain amount. Alternatively, the measured value can be reported to the base station as is, and the base station can correct the strength of the value according to the frequency position.

[0360] The above expression "frequency band exceeding the DL BWP interval" may be interpreted as exceeding the subband of the DL BWP of BWP1 in Fig. 12 or as a UL subband of a UL BWP in another frequency region separated from the subband. Alternatively, the above expression "frequency band exceeding the DL BWP interval" may refer to the UL subband region of the UL BWP of BWP1 that exceeds the DL region of the DL BWP of BWP2 in Fig. 12.

[0361] If the bandwidth of the DL BWP is wide, such as BWP1, and the bandwidth includes both the DL BWP subband and the UL BWP subband, the UE has the capability to receive signals in the UL subband of the UL BWP outside the subband range of the DL BWP, and can measure CLI by receiving signals in the UL BWP subband outside the subband range of the DL BWP of BWP1. In this case, when measuring SRS-RSRP, it is also possible to receive SRS outside the subband range of the DL BWP of BWP1 and measure SRS-RSRP. If the UL signal of the interfering user and the DL signal of the base station can be received within a specific time range, the two simultaneously received signals can be separated by frequency and SRS-RSRP measurement and DL signal processing can be performed. If simultaneous processing is difficult for the UE, or if the two signals are received outside the specific time range, it will either process the DL signal or perform UL SRS-RSRP measurement.

[0362] When the base station performs SBFD (or SSFD) operation, intra-cell inter-UE co-channel CLI occurs. In such cases, SRS-RSRP can also perform L1 / L2 or L3 measurement / reporting.

[0363] Proposal 3-2. Inter-subband CLI-RSSI measurement

[0364] When performing inter-subband CLI measurement, the base station assigns the subband to the UE to measure CLI RSSI, and the UE can perform the measurement in that resource. If DL BWP is configured with non-contiguous frequencies, the base station can configure measurement resources with non-contiguous frequencies.

[0365] If subbands belonging to non-contiguous resource frequencies are indicated using N resources and measurements are performed within one DL BWP at the same time, the CLI-RSSI measured in each resource can be calculated and reported as a single value. When reported in this manner, the reporting resource ID specifies the ID of a specific resource, but the measurement information reported with a specific resource ID may be interpreted as being the same as or representative of that measured in other resources according to an agreement between the base station and the UE, an instruction from the base station, or a recommendation from the UE.

[0366] Unlike the above-mentioned SRS-RSRP measurement, RSSI can be used to measure and report interference signals received in the DL region.

[0367] The following is part of the content of 3GPP TR38.858 v1.0.0 (September 2023).

[0368] TR38.858 v1.0.0 (2023.9)

[0369] 6.2 Inter-UE CLI handling schemes specific for SBFD

[0370] For inter-UE inter-subband CLI measurement, at least the following methods are studied:

[0371] - Method#1: victim UE measures RSSI within DL subband

[0372] - Method#2: victim UE measures RSRP of aggressor UE within UL subband

[0373] - Method#3: victim UE measures RSSI within UL subband

[0374] - Note: the restriction in Rel-16 that CLI is only measured within DL BWP does not forbid UE to measure CLI in UL subband when UL subband is confined within DL BWP.

[0375] For UE-to-UE CLI-RSSI measurement / report across downlink subbands, the following methods are studied. Note that Alt #1 and Alt #2 are supported in existing specifications.

[0376] - Alt #1: separate CLI-RSSI measurement resources / reports in each DL subband

[0377] - Alt #2: CLI-RSSI measure / report in one DL subband only

[0378] - Alt #3: CLI-RSSI measurement / report based on non-contiguous CLI-RSSI resource across downlink subbands

[0379] Alt #1 allows flexible configuration of measurement reporting in one DL subband or two DL subbands but it consumes multiple CLI-RSSI measurement resources from the UE capability budget. Alt #2 restricts gNB configuration flexibility and does not account for whether or not the CLI is asymmetric across two DL subbands. This method does not consume multiple CLI-RSSI measurement resources from UE capability point of view. Alt #3 requires additional specification efforts to support non-contiguous CLI-RSSI resource allocation across downlink subbands. This method is similar to non-contiguous CSI-RS resource allocation. A single CLI-RSSI report based on non-contiguous CLI-RSSI resource may be sufficient. This method does not consume multiple CLI-RSSI measurement resources from UE capability point of view. Note that it does not imply whether L1 or L2 based measurement is supported.

[0380] Method #2 and Method #3 can be used for identifying the aggressor UE(s) if orthogonal resources are allocated for different aggressor UE(s). Method #2 and #3 can at least provide higher interference signal strength than inter-subband interference leakage based measurements in Method #1. Furthermore, such measurement is not subject to inter-cell DL interference. It is feasible for UE to measure RSRP / RSSI within UL subband if within active DL BWP and receive DL in DL subband(s) simultaneously similar as simultaneous RSRP / RSSI measurement and DL reception in Rel-16. The existing CLI measurement and report framework can be reused to support RSRP / RSSI measurements within UL subband when UL subband is confined within active DL BWP.

[0381] [Device claim related explanation]

[0382] Hereinafter, the above-described embodiment will be described in detail in terms of the operation of the terminal with reference to Figure 21. The methods described below are merely divided for the convenience of explanation, and it goes without saying that some components of one method can be substituted for or combined with other methods as long as they are not mutually exclusive.

[0383] FIG. 21 is a diagram illustrating an example of an operation process of a terminal (user equipment, UE) in a system applicable to the present disclosure.

[0384] In step S2110, the terminal receives a command from a base station (BS) to measure the reference signal received power (RSRP) of the sounding reference signal (SRS) of another terminal within an available time interval for subband full duplex (SBFD).

[0385] In step S2120, the terminal receives configuration information for a measurement gap or a downlink rate-matching resource within a measurement time interval of the SRS from the base station.

[0386] In step S2130, the terminal receives the SRS in the measurement gap or the downlink rate matching resource.

[0387] In step S2140, the terminal transmits a report message regarding the measurement result of the RSRP for the SRS to the base station.

[0388] According to various embodiments of the present disclosure, the configuration information may further include information on priority of each type of downlink received signal. The embodiment of Figure 21 may further include receiving a downlink signal with a higher priority than the SRS in the measurement gap or the downlink rate matching resource based on the priority, or receiving the SRS without receiving a downlink signal with a lower priority than the SRS.

[0389] According to various embodiments of the present disclosure, the configuration information may further include information on an SRS resource identifier and information on a specific UE ID corresponding to the SRS resource ID. The embodiment of FIG. 21 may further include correcting the measurement result of the RSRP if the SRS corresponds to the specific UE ID.

[0390] According to various embodiments of the present disclosure, the embodiment of FIG. 21 may further include a step of receiving correction information for the RSRP from the base station, and a step of making a correction to the measurement result of the RSRP based on the correction information.

[0391] According to various embodiments of the present disclosure, the embodiment of FIG. 21 may further include receiving subband designation information for measuring a cross-link interference received signal strength indicator (CLI-RSSI), measuring the CLI-RSSI for the subband based on the designation information, and transmitting a report message regarding the CLI-RSSI measurement result to the base station.

[0392] According to various embodiments of the present disclosure, when multiple non-contiguous frequency bands are designated for measuring the CLI-RSSI, the measurement result of the CLI-RSSI may be based on the sum of the measurement results of the CLI-RSSI for the multiple non-contiguous frequency bands.

[0393] According to various embodiments of the present disclosure, the report message may include a resource ID for one of the multiple non-contiguous frequency bands, and the CLI-RSSI measurement result may represent results measured in the multiple non-contiguous frequency bands.

[0394] According to various embodiments of the present disclosure, there is provided a terminal in a wireless communication system, the terminal including a transceiver and at least one processor, the at least one processor may be configured to perform the method of operating the terminal according to FIG.

[0395] According to various embodiments of the present disclosure, there is provided an apparatus for controlling a terminal in a communication system, the apparatus including at least one processor and at least one memory operatively connected to the at least one processor, the at least one memory being configured to store instructions that, when executed by the at least one processor, perform a method of operating a terminal according to FIG.

[0396] According to various embodiments of the present disclosure, one or more non-transitory computer readable media (CRM) are provided that store one or more instructions, which, when executed by one or more processors, perform operations, and the operations may include the method of operating a terminal according to FIG.

[0397] [Explanation regarding base station claims]

[0398] Hereinafter, the above-mentioned embodiment will be described in detail in terms of the operation of a base station with reference to Figure 22. The methods described below are merely divided for the convenience of explanation, and it goes without saying that some components of one method can be substituted for or combined with other methods as long as they are not mutually exclusive.

[0399] FIG. 22 is a diagram illustrating an example of an operation process of a base station (BS) in a system applicable to the present disclosure.

[0400] In step S2210, the base station transmits to the user equipment (UE) a command to measure the reference signal received power (RSRP) of the sounding reference signal (SRS) of another terminal during a time period in which subband full duplex (SBFD) is available.

[0401] In step S2220, the base station transmits to the terminal configuration information for a measurement gap or a downlink rate-matching resource within the measurement time interval of the SRS.

[0402] In step S2230, the base station receives from the terminal a report message regarding a measurement result of the RSRP for the SRS based on the measurement gap or the downlink rate matching resource.

[0403] According to various embodiments of the present disclosure, the configuration information may further include information on priority of each type of downlink received signal. In the embodiment of Figure 22, based on the priority, the terminal may receive a downlink signal with higher priority than the SRS in the measurement gap or the downlink rate matching resource, or the terminal may receive the SRS instead of a downlink signal with lower priority than the SRS.

[0404] According to various embodiments of the present disclosure, the configuration information may further include information on an SRS resource identifier and information on a specific UE ID corresponding to the SRS resource ID. The embodiment of FIG. 22 may further include correcting the measurement result of the RSRP if the SRS corresponds to the specific UE ID.

[0405] According to various embodiments of the present disclosure, the embodiment of FIG. 22 may further include a step of transmitting correction information for the RSRP to the terminal, and a step of correcting the measurement result of the RSRP based on the correction information.

[0406] According to various embodiments of the present disclosure, the embodiment of FIG. 22 may further include a step of transmitting subband designation information for measuring a cross-link interference received signal strength indicator (CLI-RSSI), and a step of receiving a report message regarding the measurement result of the CLI-RSSI for the subband from the terminal based on the designation information.

[0407] According to various embodiments of the present disclosure, when multiple non-contiguous frequency bands are designated for measuring the CLI-RSSI, the measurement result of the CLI-RSSI may be based on the sum of the measurement results of the CLI-RSSI for the multiple non-contiguous frequency bands.

[0408] According to various embodiments of the present disclosure, the report message may include a resource ID for one of the multiple non-contiguous frequency bands, and the CLI-RSSI measurement result may represent results measured in the multiple non-contiguous frequency bands.

[0409] According to various embodiments of the present disclosure, there is provided a base station in a wireless communication system, the base station including a transceiver and at least one processor, the at least one processor may be configured to perform a method of operating a base station according to FIG.

[0410] According to various embodiments of the present disclosure, there is provided an apparatus for controlling a base station in a wireless communication system, the apparatus including at least one processor and at least one memory operatively connected to the at least one processor, the at least one memory being configured to store instructions that, when executed by the at least one processor, perform a method of operating a base station according to FIG.

[0411] According to various embodiments of the present disclosure, one or more non-transitory computer readable mediums (CRMs) are provided that store one or more instructions, which, when executed by one or more processors, perform operations, and the operations may include a method of operating a base station according to FIG.

[0412] Wireless devices applicable to the present disclosure

[0413] The following describes an example of a wireless device to which various embodiments of the present disclosure may be applied.

[0414] FIG. 23 is a diagram showing an example of the structure of a first device and a second device in a system applicable to the present disclosure.

[0415] The first device 1600 may include a processor 1610, an antenna unit 1620, a transceiver 1630, and a memory 1640.

[0416] The processor 1610 performs baseband-related signal processing and may include an upper layer processing unit 1611 and a physical layer processing unit 1615. The upper layer processing unit 1611 may process operations of the MAC layer, the RRC layer, or higher layers. The physical layer processing unit 1615 may process operations of the PHY layer. For example, if the first device 1600 is a base station device in base station-terminal communication, the physical layer processing unit 1615 may perform uplink reception signal processing, downlink transmission signal processing, etc. For example, if the first device 1600 is a first terminal device in terminal-terminal communication, the physical layer processing unit 1615 may perform downlink reception signal processing, uplink transmission signal processing, sidelink transmission signal processing, etc. In addition to performing baseband-related signal processing, the processor 1610 may also control the overall operation of the first device 1600.

[0417] The antenna unit 1620 may include one or more physical antennas, and when multiple antennas are included, MIMO transmission and reception can be supported. The transceiver 1630 may include an RF (Radio Frequency) transmitter and an RF receiver. The memory 1640 may store information processed by the processor 1610, as well as software, an operating system, applications, etc. related to the operation of the first device 1600, and may also include components such as buffers.

[0418] The processor 1610 of the first device 1600 can be configured to implement the operation of a base station in base station-terminal communication (or the operation of a first terminal device in terminal-terminal communication) in the embodiments described in this disclosure.

[0419] The second device 1650 may include a processor 1660, an antenna unit 1670, a transceiver 1680, and a memory 1690.

[0420] The processor 1660 performs baseband-related signal processing and may include an upper layer processing unit 1661 and a physical layer processing unit 1665. The upper layer processing unit 1661 may process operations of the MAC layer, the RRC layer, or higher layers. The physical layer processing unit 1665 may process operations of the PHY layer. For example, if the second device 1650 is a terminal device in base station-terminal communication, the physical layer processing unit 1665 may perform downlink reception signal processing, uplink transmission signal processing, etc. For example, if the second device 1650 is a second terminal device in terminal-terminal communication, the physical layer processing unit 1665 may perform downlink reception signal processing, uplink transmission signal processing, sidelink reception signal processing, etc. In addition to performing baseband-related signal processing, the processor 1660 may also control the overall operation of the second device 1660.

[0421] The antenna unit 1670 may include one or more physical antennas, and when multiple antennas are included, MIMO transmission and reception can be supported. The transceiver 1680 may include an RF transmitter and an RF receiver. The memory 1690 may store information processed by the processor 1660, as well as software, an operating system, applications, etc. related to the operation of the second device 1650, and may also include components such as buffers.

[0422] The processor 1660 of the second device 1650 can be configured to implement the operation of a terminal in base station-terminal communication (or the operation of a second terminal device in terminal-terminal communication) in the embodiments described in this disclosure.

[0423] In the operation of the first device 1600 and the second device 1650, the matters described in the examples of the present disclosure regarding the base station and terminal in base station-terminal communication (or the first terminal and second terminal in terminal-terminal communication) can be applied equally, and duplicate explanations will be omitted.

[0424] Here, the wireless communication technologies implemented in the devices 1600, 1650 of the present disclosure may include not only LTE, NR, and 6G, but also various other wireless communication technologies.

[0425] The claims set forth in the various embodiments of the present disclosure may be combined in various ways. For example, the technical features of the method claims of the various embodiments of the present disclosure may be combined to realize an apparatus, or the technical features of the apparatus claims of the various embodiments of the present disclosure may be combined to realize a method. Furthermore, the technical features of the method claims of the various embodiments of the present disclosure and the technical features of the apparatus claims may be combined to realize an apparatus, or the technical features of the method claims of the various embodiments of the present disclosure and the technical features of the apparatus claims may be combined to realize a method.

Claims

1. A method of operating a terminal (user equipment, UE) in a wireless communication system, comprising: receiving a measurement command for RSRP (reference signal received power) of SRS (sounding reference signal) of another terminal from a base station (BS) during a subband full duplex (SBFD) available time interval; receiving, from the base station, configuration information for a measurement gap or a downlink rate-matching resource within a measurement time interval of the SRS; receiving the SRS in the measurement gap or the downlink rate matching resource; transmitting a report message for the measurement result of the RSRP for the SRS to the base station.

2. The setting information further includes information on priority of each type of downlink received signal; 2. The method of claim 1, further comprising: receiving a downlink signal having a higher priority than the SRS in the measurement gap or the downlink rate matching resource based on the priority; or receiving the SRS without receiving a downlink signal having a lower priority than the SRS.

3. The configuration information further includes information on an SRS resource ID (SRS resource identifier) ​​and information on a specific UE ID corresponding to the SRS resource ID; The method of claim 1 , further comprising: performing a correction on the measurement result of the RSRP if the SRS corresponds to the specific UE ID.

4. receiving correction information for the RSRP from the base station; The method of claim 1 , further comprising: performing a correction on the measurement result of the RSRP based on the correction information.

5. receiving information specifying a subband for measuring a cross-link interference received signal strength indicator (CLI-RSSI); measuring the CLI-RSSI for the subband based on the specified information; The method of claim 1 , further comprising the step of transmitting a report message for the CLI-RSSI measurement result to the base station.

6. The method of claim 5, wherein when multiple non-contiguous frequency bands are designated for measuring the CLI-RSSI, the measurement result of the CLI-RSSI is based on the sum of the measurement results of the CLI-RSSI for the multiple non-contiguous frequency bands.

7. the report message includes a resource ID for one frequency band among the plurality of non-contiguous frequency bands; The method of claim 6 , wherein the measurements of the CLI-RSSI are representative of measurements in the multiple non-contiguous frequency bands.

8. A method of operating a base station (BS) in a wireless communication system, comprising: transmitting a measurement command to a user equipment (UE) for measuring reference signal received power (RSRP) of sounding reference signal (SRS) of another terminal within a subband full duplex (SBFD) available time interval; transmitting configuration information for a measurement gap or a downlink rate-matching resource within a measurement time interval of the SRS to the terminal; receiving, from the terminal, a report message for a measurement result of the RSRP for the SRS based on the measurement gap or the downlink rate matching resource.

9. The setting information further includes information on priority of each type of downlink received signal; 9. The method of claim 8, wherein the terminal receives a downlink signal having a higher priority than the SRS in the measurement gap or the downlink rate matching resource based on the priority, or the terminal receives the SRS instead of a downlink signal having a lower priority than the SRS.

10. The configuration information further includes information on an SRS resource ID (SRS resource identifier) ​​and information on a specific UE ID corresponding to the SRS resource ID; The method of claim 8 , further comprising: performing a correction on the measurement result of the RSRP if the SRS corresponds to the specific UE ID.

11. transmitting correction information for the RSRP to the terminal; The method of claim 8 , further comprising: performing a correction on the measurement result of the RSRP based on the correction information.

12. transmitting information specifying a subband for measuring a cross-link interference received signal strength indicator (CLI-RSSI); The method of claim 8, further comprising receiving a report message for the measurement result of the CLI-RSSI for the subband from the terminal based on the designation information.

13. 13. The method of claim 12, wherein when multiple non-contiguous frequency bands are designated for measuring the CLI-RSSI, the measurement result of the CLI-RSSI is based on a sum of the measurement results of the CLI-RSSI for the multiple non-contiguous frequency bands.

14. the report message includes a resource ID for one frequency band among the plurality of non-contiguous frequency bands; The method of claim 13 , wherein the measurements of the CLI-RSSI are representative of measurements in the multiple non-contiguous frequency bands.

15. A terminal (user equipment, UE) in a wireless communication system, Transmitter / receiver, at least one processor; and at least one memory operably connected to said at least one processor and storing instructions that, when executed by said at least one processor, perform operations; The operation is A terminal comprising all the steps of the method according to any one of claims 1 to 7.

16. A base station (BS) in a wireless communication system, Transmitter / receiver, at least one processor; and at least one memory operably connected to said at least one processor and storing instructions that, when executed by said at least one processor, perform operations; The operation is A base station comprising all the steps of the method according to any one of claims 8 to 14.

17. A control device for controlling a terminal (user equipment, UE) in a wireless communication system, at least one processor; and at least one memory operatively connected to the at least one processor; the at least one memory stores instructions that perform operations based on being executed by the at least one processor; The operation is A control device including all steps of the method according to any one of claims 1 to 7.

18. A control device for controlling a base station (BS) in a wireless communication system, at least one processor; and at least one memory operatively connected to the at least one processor; the at least one memory stores instructions that perform operations based on being executed by the at least one processor; The operation is A control device comprising all the steps of the method according to any one of claims 8 to 14.

19. one or more non-transitory computer-readable media storing one or more instructions; the one or more instructions perform an operation upon being executed by one or more processors; The operation is A computer readable medium comprising all the steps of the method according to any one of claims 1 to 7.

20. one or more non-transitory computer-readable media storing one or more instructions; the one or more instructions perform an operation upon being executed by one or more processors; The operation is A computer readable medium comprising all the steps of the method according to any one of claims 8 to 14.

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