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KR-20260067306-A - METHOD AND APPARATUS FOR SUBBAND FULL DUPLEX IN MOBILE WIRELESS COMMUNICATION SYSTEM

KR20260067306AKR 20260067306 AKR20260067306 AKR 20260067306AKR-20260067306-A

Abstract

A method and apparatus for supporting sub-band full duplex (SBFD) are provided. The method comprises the steps of: a terminal receiving an RRC message containing various parameters for SBFD; triggering a PHR; determining the format of the PHR; determining a PH and PCMAX for non-SBFD uplink transmission and a PH and PCMAX for SBFD uplink transmission; and transmitting a PHR MAC CE.

Inventors

  • 김성훈

Assignees

  • 주식회사 세틀랩

Dates

Publication Date
20260512
Application Date
20250911
Priority Date
20241105

Claims (8)

  1. In a method of a terminal in a wireless communication system, A step in which a terminal receives system information from a base station, wherein the system information is: Parameters for the frequency domain portion of the uplink bandwidth for Sub-band Full Duplex (SBFD); A set of parameters for the time domain part of the SBFD; and Parameter set for cell-specific time-division multiple access (TDD) configuration Including; A step in which a terminal receives a radio resource control (RRC) message from a base station, wherein the RRC message is: Parameters for the position of the Slot Format Indicator (SFI) index field within Specific Downlink Control Information (DCI); and Parameters for monitoring periodicity for a specific DCI Including; A step in which the terminal receives specific downlink control information (DCI) from a base station; A step in which a terminal performs downlink reception for a first symbol, wherein the first symbol is: Determined as a flexible symbol by a set of parameters of a cell-specific TDD configuration; Not within the time domain portion for SBFD; and Determined as a downlink symbol by the SFI index; Determined based on; The terminal includes the step of performing an uplink transmission for a second symbol, wherein the second symbol is: Determined as a flexible symbol by a set of parameters of a cell-specific TDD configuration; It is within the time domain portion for SBFD; and Determined as a downlink symbol by the SFI index Determined based on; A method characterized in that the uplink transmission in the second symbol above is performed within the frequency domain portion of the uplink bandwidth for the SBFD.
  2. In claim 1, The time domain portion of the SBFD consists of continuous symbols, and A method characterized in that the start and end symbols of the time domain part for SBFD are determined according to the set of parameters of the time domain part for SBFD.
  3. In claim 1, A method characterized in that the above 1 symbol is determined as a flexible symbol when the 1 symbol is neither a downlink symbol nor an uplink symbol according to a set of parameters of a cell-specific TDD configuration.
  4. In claim 2, If the first symbol is not one of the consecutive symbols, it is not in the time domain for the SBFD, and A method characterized in that the second symbol is within the time domain for the SBFD when it is one of the consecutive symbols.
  5. In claim 1, The above SFI index collectively represents multiple slot types for multiple slots, and Each of the above multiple slot formats represents the symbol type of the corresponding slot, and A method characterized by the above symbol type being one of a downlink symbol, a flexible symbol, or an uplink symbol.
  6. In claim 1, The method further includes the step of performing an uplink transmission in a third symbol for a first sounding reference signal (SRS), wherein: The above third symbol is represented as a downlink symbol by a set of parameters of a cell-specific TDD configuration; and The configuration parameters for the first SRS include specific instructions related to the SBFD; It further includes the step of performing an uplink transmission in the fourth symbol for the second SRS, where: The above fourth symbol is represented as an uplink symbol by a set of parameters of a cell-specific TDD configuration; A method characterized in that the configuration parameters for the second SRS above do not include the specific instructions related to the SBFD.
  7. In a terminal of a wireless communication system, A transceiver configured to transmit and receive signals; and It includes a control unit, The above control unit is, Receive system information from a base station, and the system information is: Parameters for the frequency domain portion of the uplink bandwidth for Sub-band Full Duplex (SBFD); A set of parameters for the time domain part of the SBFD; and Parameter set for cell-specific time-division multiple access (TDD) configuration Includes, A radio resource control (RRC) message is received from a base station, and the RRC message is: Parameters for the position of the Slot Format Indicator (SFI) index field within Specific Downlink Control Information (DCI); and Parameters for monitoring periodicity for a specific DCI Includes, Receive specific downlink control information (DCI) from the base station, and Downlink reception is performed for the first symbol, and the first symbol is: Determined as a flexible symbol by a set of parameters of a cell-specific TDD configuration; Not within the time domain portion for SBFD; and Determined as a downlink symbol by the SFI index, It is determined based on, It is configured to perform an uplink transmission for the second symbol, and the second symbol is: Determined as a flexible symbol by a set of parameters of a cell-specific TDD configuration; It is within the time domain portion for SBFD; and Determined as a downlink symbol by the SFI index; It is determined based on, A terminal characterized in that the uplink transmission in the second symbol above is performed within the frequency domain portion of the uplink bandwidth for the SBFD.
  8. In a method performed by a base station of a wireless communication system, A step in which a base station transmits system information to a terminal, wherein the system information is: Parameters for the frequency domain portion of the uplink bandwidth for Sub-band Full Duplex (SBFD); A set of parameters for the time domain part of the SBFD; and Parameter set for cell-specific time-division multiple access (TDD) configuration Including; A step in which a base station transmits a radio resource control (RRC) message to a terminal, wherein the RRC message is: Parameters for the position of the Slot Format Indicator (SFI) index field within Specific Downlink Control Information (DCI); and Parameters for monitoring periodicity for a specific DCI Including; A step in which a base station transmits specific downlink control information (DCI) to a terminal; A step in which a base station performs downlink transmission for a first symbol, wherein the first symbol is: Determined as a flexible symbol by a set of parameters of a cell-specific TDD configuration; Not within the time domain portion for SBFD; and Determined as a downlink symbol by the SFI index; Determined based on; The base station includes the step of performing uplink reception for a second symbol, and the second symbol is: Determined as a flexible symbol by a set of parameters of a cell-specific TDD configuration; It is within the time domain portion for SBFD; and Determined as a downlink symbol by the SFI index; Determined based on; A method characterized in that uplink reception in the second symbol above is performed within the frequency domain portion of the uplink bandwidth for the SBFD.

Description

Method and apparatus for subband full duplex in a wireless mobile communication system The present disclosure relates to a method and apparatus for subband full duplex in a wireless mobile communication system. TDD is widely used in commercial NR deployments. In TDD, time domain resources are divided between downlink and uplink. If a limited time period is allocated for the uplink in TDD, this can result in reduced coverage, increased latency, and reduced capacity. As a possible improvement, the simultaneous existence of downlink and uplink, i.e., full duplex, or more specifically, subband non-overlapping full duplex (SBFD) on the gNB side within the existing TDD band can be considered. Figure 1 is a diagram illustrating the architecture of a 5G system and NG-RAN. Figure 2 is a diagram illustrating the wireless protocol architecture of a 5G system. Figure 3 illustrates a random access procedure. Figure 4 is a diagram illustrating the ASN.1 structure of SIB1 in relation to frequency domain resources. Figure 5 illustrates an example of a frequency domain resource structure. Figure 6 is a diagram illustrating the ASN.1 structure of SIB1 in relation to time domain resources. Figure 7 illustrates an example of a time domain structure. Figure 8 illustrates another example of a frequency domain structure. Figure 9 illustrates another example of a time domain structure. Figure 10 illustrates an example of a resource pool. Figure 11 is a diagram illustrating the ASN.1 structure of SIB1 in relation to the SBFD configuration. Figure 12 illustrates the overall operation of the UE and GNB. Figure 13 is a diagram illustrating the ASN.1 structure of SIB1 in relation to the RACH configuration. Figure 14 illustrates an example of a RACH opportunity. Figure 15 illustrates SBFD-based RACH operation. Figure 16 illustrates another example of a RACH opportunity and function combination. Figure 17 illustrates another example of a frequency domain structure. Figure 18 illustrates the MAC PDU format. Figure 19 illustrates the format of a random access response. Figure 20 illustrates an example of PUSCH resource selection. Figure 21 illustrates an example of a cell's BWP. Figure 22 is a diagram illustrating the ASN.1 structure of SIB1 and RRC reconstruction. Figure 23 is a diagram illustrating the ASN.1 structure of BWP configuration information. Figure 24 is a diagram illustrating the ASN.1 structure of the TDD uplink-downlink configuration. Figure 25 illustrates examples of S-BWP and L-BWP of a cell. Figure 26 illustrates examples of virtual symbols and real symbols. Figure 27 illustrates the operation of the UE and GNB. Figure 28 is a flowchart explaining the operation of the terminal. FIG. 29 is a block diagram illustrating the internal structure of a UE to which the present disclosure applies. FIG. 30 is a block diagram illustrating the configuration of a base station according to the present disclosure. Figure 31 is a diagram illustrating the SFI configuration. Figure 32 is a diagram illustrating periodic uplink signal transmission and periodic downlink reception. Figure 33 is a flowchart explaining the operation of the terminal. Figure 34 illustrates the operation of the UE and GNB for power headroom reporting. Figure 35 illustrates various equations related to uplink transmission power. Figure 36 illustrates various forms of PHR MAC CE. Figure 37 illustrates various forms of PHR MAC CE. Figure 38 illustrates various forms of PHR MAC CE. Figure 39 illustrates mapping information for various fields of PHR MAC CE. Figure 40 is a flowchart illustrating the operation of the UE. Embodiments of the present disclosure are described in detail below with reference to the attached drawings. Furthermore, if it is determined that a detailed description of related known functions or configurations in the description of the present disclosure would unnecessarily obscure the essence of the present disclosure, such detailed description may be omitted. Additionally, terms described below are defined in consideration of the functions of the present disclosure and may vary depending on the intentions or conventions of users and operators. Therefore, definitions should be based on the content of the entire specification. In the following description, the terms used to denote access nodes, network objects, messages, interfaces between network objects, and various identification information are provided for the convenience of explanation. Accordingly, the terms used in the following description are not limited to specific meanings and may be replaced by other terms equivalent in a technical sense. For convenience, terms and definitions provided in 3GPP standards are used in the following description. However, this disclosure is not limited to the use of these terms and definitions, and any other terms and definitions may be used instead. In this disclosure, the following terms are used interchangeably: - Terminal, UE, and wireless device; - Inform