ABSTRACT
Abstract
The present disclosure relates to a 5G or 6G communication system for supporting data transmission rates higher than that of a 4G communication system such as LTE. Disclosed are a method and an apparatus for indicating a frequency resource or a format of the resource in a wireless communication system using a dual connection scheme. The method and the apparatus of the present disclosure semi-statically or dynamically change: a method for classifying frequency resources as resource block sets or resource group units and configuring at least one from among uplink, downlink, and flexible frequency resource formats for a resource group; and the configured frequency resource format, and thus the frequency resources for uplink/downlink transmission and reception can be effectively used.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
This application is a U.S. National Stage application under 35 U.S.C. § 371 of an International application number PCT/KR2021/005585, filed on May 4, 2021, which is based on and claims priority of a Korean patent application number 10-2020-0086903, filed on Jul. 14, 2020, in the Korean Intellectual Property Office, and of a Korean patent application number 10-2020-0122467, filed on Sep. 22, 2020, in the Korean Intellectual Property Office, the disclosure of each of which is incorporated by reference herein in its entirety.
TECHNICAL FIELD
The disclosure relates to a method and device for configuring frequency resources for uplink or downlink transmission and reception in a wireless communication system.
BACKGROUND ART
Considering the development of wireless communication from generation to generation, the technologies have been developed mainly for services targeting humans, such as voice calls, multimedia services, and data services. Following the commercialization of 5G (5th-generation) communication systems, it is expected that the number of connected devices will exponentially grow. Increasingly, these will be connected to communication networks. Examples of connected things may include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machines, and factory equipment. Mobile devices are expected to evolve in various form-factors, such as augmented reality glasses, virtual reality headsets, and hologram devices. In order to provide various services by connecting hundreds of billions of devices and things in the 6G (6th-generation) era, there have been ongoing efforts to develop improved 6G communication systems. For these reasons, 6G communication systems are referred to as beyond-5G systems.
6G communication systems, which are expected to be commercialized around 2030, will have a peak data rate of tera (1,000 giga)-level bps and a radio latency less than 100 μsec, and thus will be 50 times as fast as 5G communication systems and have the 1/10 radio latency thereof.
In order to accomplish such a high data rate and an ultra-low latency, it has been considered to implement 6G communication systems in a terahertz band (for example, 95 GHz to 3 THz bands). It is expected that, due to severer path loss and atmospheric absorption in the terahertz bands than those in mmWave bands introduced in 5G, technologies capable of securing the signal transmission distance (that is, coverage) will become more crucial. It is necessary to develop, as major technologies for securing the coverage, radio frequency (RF) elements, antennas, novel waveforms having a better coverage than orthogonal frequency division multiplexing (OFDM), beamforming and massive multiple input multiple output (MIMO), full dimensional MIMO (FD-MIMO), array antennas, and multiantenna transmission technologies such as large-scale antennas. In addition, there has been ongoing discussion on new technologies for improving the coverage of terahertz-band signals, such as metamaterial-based lenses and antennas, orbital angular momentum (OAM), and reconfigurable intelligent surface (RIS).
Moreover, in order to improve the spectral efficiency and the overall network performances, the following technologies have been developed for 6G communication systems: a full-duplex technology for enabling an uplink transmission and a downlink transmission to simultaneously use the same frequency resource at the same time; a network technology for utilizing satellites, high-altitude platform stations (HAPS), and the like in an integrated manner; an improved network structure for supporting mobile base stations and the like and enabling network operation optimization and automation and the like; a dynamic spectrum sharing technology via collision avoidance based on a prediction of spectrum usage; an use of artificial intelligence (AI) in wireless communication for improvement of overall network operation by utilizing AI from a designing phase for developing 6G and internalizing end-to-end AI support functions; and a next-generation distributed computing technology for overcoming the limit of UE computing ability through reachable super-high-performance communication and computing resources (such as mobile edge computing (MEC), clouds, and the like) over the network. In addition, through designing new protocols to be used in 6G communication systems, developing mechanisms for implementing a hardware-based security environment and safe use of data, and developing technologies for maintaining privacy, attempts to strengthen the connectivity between devices, optimize the network, promote softwarization of network entities, and increase the openness of wireless communications are continuing.
It is expected that research and development of 6G communication systems in hyper-connectivity, including person to machine (P2M) as well as machine to machine (M2M), will allow the next hyper-connected experience. Particularly, it is expected that services such as truly immersive extended reality (XR), high-fidelity mobile hologram, and digital replica could be provided through 6G communication systems. In addition, services such as remote surgery for security and reliability enhancement, industrial automation, and emergency response will be provided through the 6G communication system such that the technologies could be applied in various fields such as industry, medical care, automobiles, and home appliances.
As the mobile communication system as described above is able to provide various services and the wireless communication network becomes more complicated and diversified, the need for a method for more efficiently allocating data channels for downlink and uplink has emerged.
DETAILED DESCRIPTION OF THE INVENTION
Technical Problem
The disclosure provides a method and device for efficiently configuring and allocating frequency resources for uplink or downlink transmission and reception in a wireless communication system.
The disclosure provides a method and device for flexibly scheduling uplink and downlink transmission and reception in the frequency domain as well as the time domain.
Technical Solution
According to an embodiment of the disclosure, a method for configuring a frequency domain resource for uplink transmission or downlink reception by a UE in a wireless communication system may comprise identifying a guard band configured in a bandwidth of a cell or a bandwidth part configured in the UE, identifying one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, and identifying whether configuration information about a type of a resource block set is received. When the configuration information is received, it may be determined whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set, based on the configuration information. When the configuration information is not received, it may be determined whether the type of each resource block is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
According to an embodiment of the disclosure, a method for configuring a frequency domain resource for uplink reception or downlink transmission by a base station in a wireless communication system may comprise configuring a guard band in a bandwidth of a cell or a bandwidth part configured in a UE, to the UE, configuring one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, to the UE, and providing configuration information about a type of a resource block set to the UE. The configuration information may include information for determining whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set.
According to an embodiment of the disclosure, a UE configuring a frequency domain resource for uplink transmission or downlink reception in a wireless communication system may comprise a communication unit and a controller. The controller may be configured to identify a guard band configured in a bandwidth of a cell or a bandwidth part configured in the UE, identify one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, and identify whether configuration information about a type of a resource block set is received, when receiving the configuration information through the communication unit, determine whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set, based on the configuration information, and when not receiving the configuration information, determine whether the type of each resource block is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
According to an embodiment of the disclosure, a base station configuring a frequency domain resource for uplink reception or downlink transmission in a wireless communication system may comprise a communication unit and a controller. The controller may be configured to configure a guard band in a bandwidth of a cell or a bandwidth part configured in a UE, to the UE, configure one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, to the UE, and provide configuration information about a type of a resource block set to the UE. The configuration information may include information for determining whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view illustrating a wireless communication system according to an embodiment of the disclosure;
FIG. 2 is a view illustrating a configuration of a base station in a wireless communication system according to an embodiment of the disclosure;
FIG. 3 is a view illustrating a configuration of a UE in a wireless communication system according to an embodiment of the disclosure;
FIG. 4 is a view illustrating a configuration of a communication unit in a wireless communication system according to an embodiment of the disclosure;
FIG. 5 is a view illustrating a frame, a subframe, and a slot structure of a 5G communication system;
FIG. 6 is a view illustrating a basic structure of a time-frequency domain of a 5G communication system;
FIG. 7 is a view illustrating a bandwidth part of a 5G communication system;
FIG. 8 is a view illustrating an example of a control resource set configuration for a downlink control channel of a 5G communication system;
FIG. 9 is a view illustrating a structure of a downlink control channel of a 5G communication system;
FIG. 10 is a view illustrating an example of an uplink-downlink configuration in the time domain in a 5G communication system;
FIG. 11 is a view illustrating an example of an uplink-downlink configuration in the frequency domain in a 5G communication system;
FIG. 12 is a view illustrating an example of a guard band and resource block set configuration in a wireless communication system according to an embodiment of the disclosure;
FIG. 13 is a view illustrating an example of a frequency domain resource block set configuration of a downlink bandwidth part in a wireless communication system according to an embodiment of the disclosure;
FIG. 14 is a view illustrating an example of a frequency domain resource block set configuration of an uplink bandwidth part in a wireless communication system according to an embodiment of the disclosure;
FIG. 15 is a view illustrating an example of a frequency domain resource block set configuration of a flexible bandwidth part in a wireless communication system according to an embodiment of the disclosure;
FIG. 16 is a view illustrating an example of a time domain uplink and downlink configuration and frequency domain resource block set configuration in a wireless communication system according to an embodiment of the disclosure;
FIG. 17 is a flowchart illustrating configuring a frequency domain resource for uplink transmission or downlink reception by a UE in a wireless communication system; and
FIG. 18 is a flowchart illustrating configuring a frequency domain resource for uplink reception or downlink transmission by a base station in a wireless communication system.
MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the disclosure are described with reference to the accompanying drawings.
In describing the disclosure, the description of technologies that are known in the art and are not directly related to the present invention is omitted. This is for further clarifying the gist of the present disclosure without making it unclear. The terms as used herein are defined considering the functions in the present disclosure and may be replaced with other terms according to the intention or practice of the user or operator. Therefore, the terms should be defined based on the overall disclosure.
For the same reasons, some elements may be exaggerated or schematically shown. The size of each element does not necessarily reflects the real size of the element. The same reference numeral is used to refer to the same element throughout the drawings.
Advantages and features of the present disclosure, and methods for achieving the same may be understood through the embodiments to be described below taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed herein, and various changes may be made thereto. The embodiments disclosed herein are provided only to inform one of ordinary skilled in the art of the category of the present disclosure. The present invention is defined only by the appended claims. The same reference numeral denotes the same element throughout the specification. When determined to make the subject matter of the present invention unclear, the detailed description of the known art or functions may be skipped. The terms as used herein are defined considering the functions in the present disclosure and may be replaced with other terms according to the intention or practice of the user or operator. Therefore, the terms should be defined based on the overall disclosure.
Hereinafter, a base station (BS) is an entity that performs resource allocation of a UE, and may be at least one of a gNode B, eNode B, Node B, (or xNode B (where x is an alphabetic character including g and e)), a radio access unit, a base station controller, a satellite, an airborn, or a node on network. The user equ
CROSS-REFERENCE TO RELATED APPLICATION(S)
This application is a U.S. National Stage application under 35 U.S.C. § 371 of an International application number PCT/KR2021/005585, filed on May 4, 2021, which is based on and claims priority of a Korean patent application number 10-2020-0086903, filed on Jul. 14, 2020, in the Korean Intellectual Property Office, and of a Korean patent application number 10-2020-0122467, filed on Sep. 22, 2020, in the Korean Intellectual Property Office, the disclosure of each of which is incorporated by reference herein in its entirety.
TECHNICAL FIELD
The disclosure relates to a method and device for configuring frequency resources for uplink or downlink transmission and reception in a wireless communication system.
BACKGROUND ART
Considering the development of wireless communication from generation to generation, the technologies have been developed mainly for services targeting humans, such as voice calls, multimedia services, and data services. Following the commercialization of 5G (5th-generation) communication systems, it is expected that the number of connected devices will exponentially grow. Increasingly, these will be connected to communication networks. Examples of connected things may include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machines, and factory equipment. Mobile devices are expected to evolve in various form-factors, such as augmented reality glasses, virtual reality headsets, and hologram devices. In order to provide various services by connecting hundreds of billions of devices and things in the 6G (6th-generation) era, there have been ongoing efforts to develop improved 6G communication systems. For these reasons, 6G communication systems are referred to as beyond-5G systems.
6G communication systems, which are expected to be commercialized around 2030, will have a peak data rate of tera (1,000 giga)-level bps and a radio latency less than 100 μsec, and thus will be 50 times as fast as 5G communication systems and have the 1/10 radio latency thereof.
In order to accomplish such a high data rate and an ultra-low latency, it has been considered to implement 6G communication systems in a terahertz band (for example, 95 GHz to 3 THz bands). It is expected that, due to severer path loss and atmospheric absorption in the terahertz bands than those in mmWave bands introduced in 5G, technologies capable of securing the signal transmission distance (that is, coverage) will become more crucial. It is necessary to develop, as major technologies for securing the coverage, radio frequency (RF) elements, antennas, novel waveforms having a better coverage than orthogonal frequency division multiplexing (OFDM), beamforming and massive multiple input multiple output (MIMO), full dimensional MIMO (FD-MIMO), array antennas, and multiantenna transmission technologies such as large-scale antennas. In addition, there has been ongoing discussion on new technologies for improving the coverage of terahertz-band signals, such as metamaterial-based lenses and antennas, orbital angular momentum (OAM), and reconfigurable intelligent surface (RIS).
Moreover, in order to improve the spectral efficiency and the overall network performances, the following technologies have been developed for 6G communication systems: a full-duplex technology for enabling an uplink transmission and a downlink transmission to simultaneously use the same frequency resource at the same time; a network technology for utilizing satellites, high-altitude platform stations (HAPS), and the like in an integrated manner; an improved network structure for supporting mobile base stations and the like and enabling network operation optimization and automation and the like; a dynamic spectrum sharing technology via collision avoidance based on a prediction of spectrum usage; an use of artificial intelligence (AI) in wireless communication for improvement of overall network operation by utilizing AI from a designing phase for developing 6G and internalizing end-to-end AI support functions; and a next-generation distributed computing technology for overcoming the limit of UE computing ability through reachable super-high-performance communication and computing resources (such as mobile edge computing (MEC), clouds, and the like) over the network. In addition, through designing new protocols to be used in 6G communication systems, developing mechanisms for implementing a hardware-based security environment and safe use of data, and developing technologies for maintaining privacy, attempts to strengthen the connectivity between devices, optimize the network, promote softwarization of network entities, and increase the openness of wireless communications are continuing.
It is expected that research and development of 6G communication systems in hyper-connectivity, including person to machine (P2M) as well as machine to machine (M2M), will allow the next hyper-connected experience. Particularly, it is expected that services such as truly immersive extended reality (XR), high-fidelity mobile hologram, and digital replica could be provided through 6G communication systems. In addition, services such as remote surgery for security and reliability enhancement, industrial automation, and emergency response will be provided through the 6G communication system such that the technologies could be applied in various fields such as industry, medical care, automobiles, and home appliances.
As the mobile communication system as described above is able to provide various services and the wireless communication network becomes more complicated and diversified, the need for a method for more efficiently allocating data channels for downlink and uplink has emerged.
DETAILED DESCRIPTION OF THE INVENTION
Technical Problem
The disclosure provides a method and device for efficiently configuring and allocating frequency resources for uplink or downlink transmission and reception in a wireless communication system.
The disclosure provides a method and device for flexibly scheduling uplink and downlink transmission and reception in the frequency domain as well as the time domain.
Technical Solution
According to an embodiment of the disclosure, a method for configuring a frequency domain resource for uplink transmission or downlink reception by a UE in a wireless communication system may comprise identifying a guard band configured in a bandwidth of a cell or a bandwidth part configured in the UE, identifying one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, and identifying whether configuration information about a type of a resource block set is received. When the configuration information is received, it may be determined whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set, based on the configuration information. When the configuration information is not received, it may be determined whether the type of each resource block is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
According to an embodiment of the disclosure, a method for configuring a frequency domain resource for uplink reception or downlink transmission by a base station in a wireless communication system may comprise configuring a guard band in a bandwidth of a cell or a bandwidth part configured in a UE, to the UE, configuring one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, to the UE, and providing configuration information about a type of a resource block set to the UE. The configuration information may include information for determining whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set.
According to an embodiment of the disclosure, a UE configuring a frequency domain resource for uplink transmission or downlink reception in a wireless communication system may comprise a communication unit and a controller. The controller may be configured to identify a guard band configured in a bandwidth of a cell or a bandwidth part configured in the UE, identify one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, and identify whether configuration information about a type of a resource block set is received, when receiving the configuration information through the communication unit, determine whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set, based on the configuration information, and when not receiving the configuration information, determine whether the type of each resource block is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
According to an embodiment of the disclosure, a base station configuring a frequency domain resource for uplink reception or downlink transmission in a wireless communication system may comprise a communication unit and a controller. The controller may be configured to configure a guard band in a bandwidth of a cell or a bandwidth part configured in a UE, to the UE, configure one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part, to the UE, and provide configuration information about a type of a resource block set to the UE. The configuration information may include information for determining whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view illustrating a wireless communication system according to an embodiment of the disclosure;
FIG. 2 is a view illustrating a configuration of a base station in a wireless communication system according to an embodiment of the disclosure;
FIG. 3 is a view illustrating a configuration of a UE in a wireless communication system according to an embodiment of the disclosure;
FIG. 4 is a view illustrating a configuration of a communication unit in a wireless communication system according to an embodiment of the disclosure;
FIG. 5 is a view illustrating a frame, a subframe, and a slot structure of a 5G communication system;
FIG. 6 is a view illustrating a basic structure of a time-frequency domain of a 5G communication system;
FIG. 7 is a view illustrating a bandwidth part of a 5G communication system;
FIG. 8 is a view illustrating an example of a control resource set configuration for a downlink control channel of a 5G communication system;
FIG. 9 is a view illustrating a structure of a downlink control channel of a 5G communication system;
FIG. 10 is a view illustrating an example of an uplink-downlink configuration in the time domain in a 5G communication system;
FIG. 11 is a view illustrating an example of an uplink-downlink configuration in the frequency domain in a 5G communication system;
FIG. 12 is a view illustrating an example of a guard band and resource block set configuration in a wireless communication system according to an embodiment of the disclosure;
FIG. 13 is a view illustrating an example of a frequency domain resource block set configuration of a downlink bandwidth part in a wireless communication system according to an embodiment of the disclosure;
FIG. 14 is a view illustrating an example of a frequency domain resource block set configuration of an uplink bandwidth part in a wireless communication system according to an embodiment of the disclosure;
FIG. 15 is a view illustrating an example of a frequency domain resource block set configuration of a flexible bandwidth part in a wireless communication system according to an embodiment of the disclosure;
FIG. 16 is a view illustrating an example of a time domain uplink and downlink configuration and frequency domain resource block set configuration in a wireless communication system according to an embodiment of the disclosure;
FIG. 17 is a flowchart illustrating configuring a frequency domain resource for uplink transmission or downlink reception by a UE in a wireless communication system; and
FIG. 18 is a flowchart illustrating configuring a frequency domain resource for uplink reception or downlink transmission by a base station in a wireless communication system.
MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the disclosure are described with reference to the accompanying drawings.
In describing the disclosure, the description of technologies that are known in the art and are not directly related to the present invention is omitted. This is for further clarifying the gist of the present disclosure without making it unclear. The terms as used herein are defined considering the functions in the present disclosure and may be replaced with other terms according to the intention or practice of the user or operator. Therefore, the terms should be defined based on the overall disclosure.
For the same reasons, some elements may be exaggerated or schematically shown. The size of each element does not necessarily reflects the real size of the element. The same reference numeral is used to refer to the same element throughout the drawings.
Advantages and features of the present disclosure, and methods for achieving the same may be understood through the embodiments to be described below taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed herein, and various changes may be made thereto. The embodiments disclosed herein are provided only to inform one of ordinary skilled in the art of the category of the present disclosure. The present invention is defined only by the appended claims. The same reference numeral denotes the same element throughout the specification. When determined to make the subject matter of the present invention unclear, the detailed description of the known art or functions may be skipped. The terms as used herein are defined considering the functions in the present disclosure and may be replaced with other terms according to the intention or practice of the user or operator. Therefore, the terms should be defined based on the overall disclosure.
Hereinafter, a base station (BS) is an entity that performs resource allocation of a UE, and may be at least one of a gNode B, eNode B, Node B, (or xNode B (where x is an alphabetic character including g and e)), a radio access unit, a base station controller, a satellite, an airborn, or a node on network. The user equipment (UE) may include a mobile station (MS), vehicle, satellite, airborn, cellular phone, smartphone, computer, or multimedia system capable of performing communication functions. In the disclosure, downlink (DL) refers to a wireless transmission path of signal transmitted from the base station to the terminal, and uplink (UL) refers to a wireless transmission path of signal transmitted from the terminal to the base station. Additionally, a sidelink (SL) meaning a radio transmission path of a signal transmitted from a UE to another UE may exist.
Although LTE, LTE-A, or 5G systems may be described below as an example, the embodiments may be applied to other communication systems having a similar technical background or channel pattern. For example, embodiments of the disclosure may also be applied to 5G-advance or NR-advance or 6th generation mobile communication technology (6G) developed after 5G mobile communication technology (or new radio, NR). The following 5G may be a concept encompassing the legacy LTE, LTE-A and other similar services. Further, the embodiments may be modified in such a range as not to significantly depart from the scope of the present invention under the determination by one of ordinary skill in the art and such modifications may be applicable to other communication systems.
It should be appreciated that the blocks in each flowchart and combinations of the flowcharts may be performed by computer program instructions. Since the computer program instructions may be equipped in a processor of a general-use computer, a special-use computer or other programmable data processing devices, the instructions executed through a processor of a computer or other programmable data processing devices generate means for performing the functions described in connection with a block(s) of each flowchart. Since the computer program instructions may be stored in a computer-available or computer-readable memory that may be oriented to a computer or other programmable data processing devices to implement a function in a specified manner, the instructions stored in the computer-available or computer-readable memory may produce a product including an instruction means for performing the functions described in connection with a block(s) in each flowchart. Since the computer program instructions may be equipped in a computer or other programmable data processing devices, instructions that generate a process executed by a computer as a series of operational steps are performed over the computer or other programmable data processing devices and operate the computer or other programmable data processing devices may provide steps for executing the functions described in connection with a block(s) in each flowchart.
Further, each block may represent a module, segment, or part of a code including one or more executable instructions for executing a specified logical function(s). Further, it should also be noted that in some replacement execution examples, the functions mentioned in the blocks may occur in different orders. For example, two blocks that are consecutively shown may be performed substantially simultaneously or in a reverse order depending on corresponding functions.
As used herein, the term âunitâ means a software element or a hardware element such as a field-programmable gate array (FPGA) or an application specific integrated circuit (ASIC). A unit plays a certain role. However, the term âunitâ is not limited as meaning a software or hardware element. A âunitâ may be configured in a storage medium that may be addressed or may be configured to reproduce one or more processors. Accordingly, as an example, a âunitâ includes elements, such as software elements, object-oriented software elements, class elements, and task elements, processes, functions, attributes, procedures, subroutines, segments of program codes, drivers, firmware, microcodes, circuits, data, databases, data architectures, tables, arrays, and variables. A function provided in an element or a âunitâ may be combined with additional elements or may be split into sub elements or sub units. Further, an element or a âunitâ may be implemented to reproduce one or more CPUs in a device or a security multimedia card. According to embodiments, a â . . . unitâ may include one or more processors.
Wireless communication systems evolve beyond voice-centered services to broadband wireless communication systems to provide high data rate and high-quality packet data services, such as 3rd generation partnership project (3GPP) high speed packet access (HSPA), long term evolution (LTE) or evolved universal terrestrial radio access (E-UTRA)), LTE-advanced (LTE-A), LTE-pro, 3GPP2 high rate packet data (HRPD), ultra-mobile broadband (UMB), and institute of electrical and electronics engineers (IEEE) 802.16e communication standards.
As a representative example of such broadband wireless communication system, the LTE system adopts orthogonal frequency division multiplexing (OFDM) for downlink and single carrier frequency division multiple access (SC-FDMA) for uplink. Uplink means a wireless link where the UE transmits data or control signals to the base station, and download means a wireless link where the base station transmits data or control signals to the UE. Such multiple access scheme may typically allocate and operate time-frequency resources carrying data or control information per user not to overlap, i.e., to maintain orthogonality, to thereby differentiate each user's data or control information.
Post-LTE communication systems, e.g., 5G communication systems, are required to freely reflect various needs of users and service providers and thus to support services that simultaneously meet various requirements. Services considered for 5G communication systems include, e.g., enhanced mobile broadband (eMBB), massive machine type communication (MMTC), and ultra-reliability low latency communication (URLLC).
eMBB aims to provide a further enhanced data transmission rate as compared with LTE, LTE-A, or LTE-pro. For example, eMBB for 5G communication systems needs to provide a peak data rate of 20 Gbps on download and a peak data rate of 10 Gbps on uplink in terms of one base station. 5G communication systems also need to provide an increased user perceived data rate while simultaneously providing such peak data rate. To meet such requirements, various transmit (TX)/receive (RX) techniques, as well as multiple input multiple output (MIMO), need to further be enhanced. While LTE adopts a TX bandwidth up to 20 MHz in the 2 GHz band to transmit signals, the 5G communication system employs a broader frequency bandwidth in a frequency band ranging from 3 GHz to 6 GHz or more than 6 GHz to meet the data rate required for 5G communication systems.
mMTC is also considered to support application services, such as internet of things (IoT) in the 5G communication system. To efficiently provide IoT, mMTC is required to support massive UEs in the cell, enhance the coverage of the UE and the battery time, and reduce UE costs. IoT terminals are attached to various sensors or devices to provide communication functionality, and thus, it needs to support a number of UEs in each cell (e.g., 1,000,000 UEs/km 2 ). Since mMTC-supportive UEs, by the nature of service, are highly likely to be located in shadow areas not covered by the cell, such as the underground of a building, it may require much broader coverage as compared with other services that the 5G communication system provides. mMTC-supportive UEs, due to the need for being low cost and difficulty in frequently exchanging batteries, may be required to have a very long battery life time, e.g., 10 years to 15 years.
URLLC is a mission-critical, cellular-based wireless communication service. For example, URLLC may be considered for use in remote control for robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, or emergency alert. This requires that URLLC provide very low-latency and very high-reliability communication. For example, URLLC-supportive services need to meet an air interface latency of less than 0.5 milliseconds simultaneously with a packet error rate of 10 â5 or less. Thus, for URLLC-supportive services, the 5G communication system may be required to provide a shorter transmit time interval (TTI) than those for other services while securing reliable communication links by allocating a broad resource in the frequency band.
The three 5G services, i.e., eMBB, URLLC, and mMTC, may be multiplexed in one system and be transmitted. In this case, the services may adopt different TX/RX schemes and TX/RX parameters to meet their different requirements. Of course, 5G is not limited to the above-described three services.
FIG. 1 is a view illustrating a wireless communication system according to an embodiment of the disclosure. FIG. 1 exemplifies a base station 110 , a UE 120 , and a UE 130 as some nodes using wireless channels in the wireless communication system. Although only one base station is illustrated in FIG. 1 as an example, one or more base stations identical or similar to the base station 110 may be further included.
Referring to FIG. 1 , the base station 110 may be a network infrastructure that provides wireless access to the UEs 120 and 130 . The base station 110 has a coverage defined as a predetermined geographic area based on an arrival distance within which it may transmit radio signals. The base station 110 may be denoted in other terms, such as an âaccess point (AP)â, an âeNodeB (eNB)â, a âgNodeB (gNB)â, a â5th generation (5G) nodeâ, a âwireless pointâ, or a âtransmission/reception point (TRP)â or in other various terms with an equivalent technical meaning thereto.
Each of the UE 120 and the UE 130 is a device that may be used by the user and may perform communication with the base station 110 through a radio channel. In some cases, at least one of the UE 120 and the UE 130 may be operated without the user's involvement. In other words, at least one of the UE 120 and the UE 130 may be a device that performs machine type communication (MTC) and may not be carried by the user. Each of the UEs 120 and 130 may also be denoted by other terms, such as user equipment (UE), mobile station, subscriber station, remote terminal, wireless terminal, user device, or in other various terms with equivalent technical meanings thereto.
The wireless communication environment may include wireless communication in a licensed band as well as in an unlicensed band. The base station 110 , UE 120 , and UE 130 may transmit and receive radio signals in unlicensed bands (e.g., 5 GHz to 7.125 GHz band, up to 71 GHz band). As an embodiment, a cellular communication system and another communication system (e.g., wireless local area network, WLAN) may coexist in an unlicensed band. To ensure fairness between two communication systems, that is, to prevent a situation in which a channel is exclusively used by one system, the base station 110 , the UE 120 , and the UE 130 may perform a channel access procedure for the unlicensed band. As an example of a channel access procedure for an unlicensed band, the base station 110 , the UE 120 , and the UE 130 may perform listen before talk (LBT).
The base station 110 , the UE 120 , and the UE 130 may transmit and receive radio signals in a mmWave band (e.g., 28 GHz, 30 GHz, 38 GHz, and 60 GHz). In this case, to enhance the channel gain, the base station 110 , the UE 120 , and the UE 130 may perform beamforming. Here, beamforming may include transmit beamforming and/or receive beamforming. In other words, the base station 110 , the UE 120 , and the UE 130 may assign directivity to the transmit signal or receive signal. To that end, the base station 110 and the UEs 120 and 130 may select serving beams through a beam search or beam management procedure. After the serving beams are selected, communication between the base station 110 and the UEs 120 and 130 may be performed through a resource having a quasi co-located (QCL) relationship with the resource transmitting the serving beams.
The base station 110 may select a beam 112 or 113 in a specific direction. The base station 110 may communicate with the UE using the beam 112 or 113 in the specific direction. For example, the base station 110 may receive signals from the UE 120 or transmit signals to the UE 120 through the beam 112 . The UE 120 may receive a signal from the base station 110 or transmit a signal to the base station 110 through the beam 121 . Further, the base station 110 may receive a signal from the UE 130 or transmit a signal to the UE 130 through the beam 113 . The UE 130 may receive a signal from the base station 110 or transmit a signal to the base station 110 through the beam 131 .
FIG. 2 is a view illustrating a configuration of a base station in a wireless communication system according to an embodiment of the disclosure. The configuration shown in FIG. 2 may be appreciated as the configuration of the base station 110 of FIG. 1 . Further, the term â . . . unitâ and the suffixâ . . . erâ as used herein denote a unit processing at least one function or operation and be implemented in hardware, software, or a combination thereof.
Referring to FIG. 2 , the base station may include a wireless communication unit 210 , a backhaul communication unit 220 , a storage unit 230 , and a controller 240 .
The wireless communication unit 210 (which may be used interchangeably with a transceiver) may perform functions for transmitting and receiving signals through a wireless channel. For example, the wireless communication unit 210 may perform the function of conversion between a baseband signal and bit stream according to the system physical layer specifications. For example, when transmitting a signal, the wireless communication unit 210 may generate complex symbols by encoding and modulating a transmission bit stream. Further, when receiving a signal, the wireless communication unit 210 may restore the transmission bit stream through demodulation and decoding of the received baseband signal.
Further, the wireless communication unit 210 may up-convert the baseband signal into a radio frequency (RF) band signal and transmits the converted signal via an antenna, and the wireless communication unit 210 may down-convert the RF band signal received via an antenna into a baseband signal. To that end, the wireless communication unit 210 may include, e.g., a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), and an analog-to-digital converter (ADC). Further, the wireless communication unit 210 may include a plurality of RF chains corresponding to a plurality of transmission/reception paths. Further, the wireless communication unit 210 may include at least one antenna array constituted of multiple antenna elements.
In terms of hardware, the wireless communication unit 210 may be configured of a digital unit or analog unit, and the analog unit may be constituted of multiple sub units depending on the operation power and operation frequency. The digital unit may be implemented as at least one processor (e.g., a digital signal processor (DSP)).
The wireless communication unit 210 may transmit and receive signals as described above. Thus, the whole or part of the wireless communication unit 210 may be referred to as a âtransmitter,â âreceiver,â or âtransceiver.â Further, transmission and reception performed via a wireless channel in the following description may also mean performing the above-described process by the wireless communication unit 210 . According to an embodiment, the wireless communication unit 210 may include at least one transceiver.
The backhaul communication unit 220 may provide an interface for communicating with other nodes in the network. In other words, the backhaul communication unit 220 may convert the bit string transmitted from the base station to another node, e.g., another access node, another base station, an upper node, or a core network, into a physical signal and converts the physical signal received from another node into a bit stream.
The storage unit 230 may store a basic program for operating the base station, application programs, configuration information, or other data. The storage unit 230 may be configured as a volatile memory, a non-volatile memory, or a combination of a volatile memory and a non-volatile memory. The storage unit 230 may provide the stored data according to a request from the controller 240 . In an embodiment, the storage unit 230 may include at least one memory.
The controller 240 may control the overall operation of the base station. For example, the controller 240 may transmit and receive signals through the wireless communication unit 210 or the backhaul communication unit 220 . Further, the controller 240 may record and read data in/from the storage unit 230 . The controller 240 may perform the functions of the protocol stack required in the communication specifications. In an embodiment, the protocol stack may be included in the wireless communication unit 210 . In an embodiment, the controller 240 may include at least one processor.
The controller 240 may control the base station to perform operations according to at least one of various embodiments described below. For example, the controller 240 may perform a channel access procedure for an unlicensed band. For example, after the transceiver (e.g., the wireless communication unit 210 ) receives signals transmitted in an unlicensed band, the controller 240 may compare the strength of the received signal, described above, with a threshold previously defined or determined as a value of a function using, e.g., bandwidth as a parameter to determine whether the unlicensed band is in an idle state. Further, for example, the controller 240 may transmit a control signal to the UE or receive a control signal from the UE through the transceiver. Further, the controller 240 may transmit data to the UE or receive data from the UE through the transceiver. The controller 240 may determine a transmission result for a signal transmitted to the UE based on a control signal or a data signal received from the UE.
The controller 240 may configure one downlink control information (DCI) for allocating one or more data channels to one or more cells and may transmit the DCI to the UE through the wireless communication unit 210 . Further, the controller 240 may provide the UE with configuration information necessary for allocating one or more data channels by one DCI through higher layer signaling before transmitting the DCI. Further, the controller 240 may transmit a data channel to the UE or receive a data channel from the UE based on the configuration information and the information fields included in the DCI.
Further, as an example, the controller 240 may maintain or change the length of the contention window (CW) for the channel access procedure (hereinafter, âcontention window adjustmentâ) based on the transmission result, that is, based on the result of reception of the control signal or data signal by the UE. According to an embodiment, the controller 240 may determine a reference window to obtain a transmission result for adjusting the contention window. The controller 240 may determine a data channel for adjusting the contention window in the reference window. The controller 240 may determine a reference control channel for adjusting the contention window in the reference window. If it is determined that the unlicensed band is in an idle state, the controller 240 may occupy the channel.
Further, the controller 240 may control to receive uplink control information (UCI) from the UE through the wireless communication unit 210 and identify whether retransmission is required for downlink data channel and/or modulation and coding scheme needs to be changed through one or more hybrid automatic repeat request acknowledgment (HARQ-ACK) information and/or channel state information (CSI) included in the above-described uplink control information. Further, the controller 240 may control to schedule initial or retransmission of downlink data, generate downlink control information to request uplink control information transmission and transmit the above-described downlink control information to the UE through the wireless communication unit 210 . Further, the controller 240 may control the above-described wireless communication unit 210 to receive (re)transmitted uplink data and/or uplink control information according to the above-described downlink control information.
Although it is described in FIG. 2 that each block performs a different function, this is merely for convenience of description, and each function is not necessarily so distinguished. For example, the base station may include the controller and communication unit of FIG. 18 , and the communication unit may perform at least one function of the wireless communication unit 210 or the backhaul communication unit 220 .
FIG. 3 is a view illustrating a configuration of a UE in a wireless communication system according to an embodiment of the disclosure. The configuration shown in FIG. 3 may be appreciated as the configuration of the UE 120 or 130 of FIG. 1 . Further, the term â . . . unitâ and the suffixâ . . . erâ as used herein denote a unit processing at least one function or operation and be implemented in hardware, software, or a combination thereof.
Referring to FIG. 3 , the UE may include a wireless communication unit 310 , a storage unit 320 , and a controller 330 .
The wireless communication unit 310 (which may be used interchangeably with a transceiver) may perform functions for transmitting and receiving signals through a wireless channel. For example, the wireless communication unit 310 may perform the function of conversion between a baseband signal and bit stream according to the system physical layer specifications. For example, when transmitting a signal, the wireless communication unit 310 may generate complex symbols by encoding and modulating a transmission bit stream. Further, when receiving a signal, the wireless communication unit 310 may restore the transmission bit stream through demodulation and decoding of the received baseband signal. Further, the wireless communication unit 310 may up-convert the baseband signal into an RF band signal and transmits the converted signal via an antenna, and the wireless communication unit 310 may down-convert the RF band signal received via an antenna into a baseband signal. For example, the wireless communication unit 310 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC.
The wireless communication unit 310 may include multiple transmission/reception paths. Further, the wireless communication unit 310 may include at least one antenna array constituted of multiple antenna elements. In terms of hardware, the wireless communication unit 310 may be configured of a digital unit and an analog unit (e.g., a radio frequency integrated circuit (RFIC)). Here, the digital unit and analog unit may be implemented in a single package. The wireless communication unit 310 may include multiple RF chains. Further, the wireless communication unit 310 may include at least one antenna array constituted of multiple antenna elements, performing beamforming.
The wireless communication unit 310 may transmit and receive signals as described above. Thus, the whole or part of the wireless communication unit 310 may be referred to as a âtransmitter,â receiver,â² or âtransceiver.â Further, transmission and reception performed via a wireless channel in the following description may also mean performing the above-described process by the wireless communication unit 310 . According to an embodiment, the wireless communication unit 310 may include at least one transceiver.
The storage unit 320 may store a basic program for operating the UE, application programs, configuration information, or other data. The storage unit 320 may be configured as a volatile memory, a non-volatile memory, or a combination of a volatile memory and a non-volatile memory. The storage unit 320 may provide the stored data according to a request from the controller 330 . According to an embodiment, the storage unit 320 may include at least one memory.
The controller 330 may control the overall operation of the UE. For example, the controller 330 may transmit and receive signals via the wireless communication unit 310 . The controller 330 records and reads data in/from the storage unit 320 . The controller 330 may perform the functions of the protocol stack required in the communication specifications. To that end, the controller 330 may include at least one processor or microprocessor or may be part of a processor. According to an embodiment, the controller 330 may include at least one processor. Further, according to an embodiment, part of the wireless communication unit 310 and/or the controller 330 may be referred to as a communication processor (CP).
The controller 330 may control the UE to perform operations according to at least one of various embodiments described below. For example, the controller 330 may receive the downlink signal (downlink control signal or downlink data) transmitted by the base station through the transceiver (e.g., the communication unit 310 ). Further, for example, the controller 330 may determine a transmission result for the downlink signal. The transmission result is feedback on the transmitted downlink signal, and may include, e.g., an acknowledgment (ACK), negative ACK (NACK), or discontinuous transmission (DTX). In the disclosure, the transmission result may be denoted by various terms, such as a reception state of downlink signal, a reception result, a decoding result, and HARQ-ACK information. Further, for example, the controller 330 may transmit an uplink signal as a response signal to the downlink signal to the base station through the transceiver. The uplink signal may explicitly or implicitly include the transmission result of the downlink signal. Further, for example, the controller 330 may include at least one or more of the above-described HARQ-ACK information and/or channel state information (CSI) in the uplink control information and transmit the uplink control information to the base station through the wireless communication unit 310 . In this case, the uplink control information may be transmitted through the uplink data channel, together with uplink data, or be transmitted to the base station through the uplink data channel without uplink data.
The controller 330 may perform a channel access procedure for an unlicensed band. For example, the wireless communication unit 310 receives signals transmitted in an unlicensed band, and the controller 330 may compare the strength of the received signal, described above, with a threshold previously defined or determined as a value of a function using, e.g., bandwidth as a parameter to determine whether the above-described unlicensed band is in an idle state. The controller 330 may perform an access procedure for the unlicensed band to transmit a signal to the base station. Further, the controller 330 may determine an uplink transmission resource to transmit uplink control information using at least one of the result of performing the above-described channel access procedure and the downlink control information received from the base station and transmit the uplink control information to the base station through the transceiver.
The controller 330 may receive, from the base station through the wireless communication unit 310 , higher layer signaling including configuration information necessary to receive one downlink control information (DCI) configured to allocate one or more data channels to one or more cells. The controller 330 also receives the DCI and interprets fields included in the DCI based on the configuration information. Further, the controller 330 may transmit a data channel to the base station or receive a data channel from the base station based on the configuration information and the information fields included in the DCI.
Although it is described in FIG. 3 that each block performs a different function, this is merely for convenience of description, and each function is not necessarily so distinguished. For example, the UE may include the controller and communication unit of FIG. 17 .
FIG. 4 is a view illustrating a configuration of a communication unit in a wireless communication system according to various embodiments of the disclosure. FIG. 4 may illustrate an example of a detailed configuration of the wireless communication unit 210 of FIG. 2 or the wireless communication unit 310 of FIG. 3 . Specifically, FIG. 4 may exemplify components for performing beamforming as part of the wireless communication unit 210 of FIG. 2 or the wireless communication unit 310 of FIG. 3 .
Referring to FIG. 4 , the wireless communication unit 210 or the wireless communication unit 310 may include an encoding/modulating unit 402 , a digital beamforming unit 404 , multiple transmission paths 406 - 1 to 406 -N, and an analog beamforming unit 408 .
The encoding/modulating unit 402 performs channel encoding. For channel encoding, at least one of a low-density parity check (LDPC) code, a convolution code, or a polar code may be used. The encoding/modulating unit 402 may perform constellation mapping on the encoded bits, thereby generating modulation symbols.
The digital beamforming unit 404 may perform beamforming on digital signals (e.g., modulation symbols). To that end, the digital beamforming unit 404 may multiply modulation symbols by beamforming weights. Here, the beamforming weights may be used to change the magnitude and phase of signals and may be referred to as âprecoding matrixâ or âprecoder.â The digital beamforming unit 404 may output the digital beamformed (i.e., precoded) modulation symbols to the multiple transmission paths 406 - 1 to 406 -N. At this time, the modulation symbols may be multiplexed by a multiple-input multiple-output (MIMO) transmission scheme, or the same modulation symbols may be provided to the multiple transmission paths 406 - 1 to 406 -N.
The multiple transmission paths 406 - 1 to 406 -N may convert the digital beamformed digital signals into analog signals. To that end, each of the multiple transmission paths 406 - 1 to 406 -N may include an inverse fast Fourier transform (IFFT) computation unit, a cyclic prefix (CP) inserting unit, a digital-to-analog converter (DAC), and an up-converting unit. The CP inserting unit is for an orthogonal frequency division multiplexing (OFDM) scheme and may be excluded if a different physical layer scheme (e.g., filter bank multi-carrier (FBMC)) is applied. The multiple transmission paths 406 - 1 to 406 -N may provide independent signal processes on multiple streams generated via digital beamforming. According to implementation schemes, some of the components of the multiple transmission paths 406 - 1 to 406 -N may be shared.
The analog beamforming unit 408 may perform beamforming on the analog signals from the multiple transmission paths 406 - 1 to 406 -N and connect to at least one antenna array constituted of multiple antenna elements. To that end, the analog beamforming unit 408 may multiply the analog signals by beamforming weights. Here, the beamforming weights may be used to change the magnitude and phase of signals. The analog beamforming unit 408 may come in various configurations depending on the connection structure between the multiple transmission paths 406 - 1 to 406 -N and antennas. For example, each of the multiple transmission paths 406 - 1 to 406 -N may be connected to one antenna array. As another example, the multiple transmission paths 406 - 1 to 406 -N may be connected to one antenna array. As still another example, the multiple transmission paths 406 - 1 to 406 -N may be connected adaptively to one antenna array or two or more antenna arrays.
The frame structure of the 5G system is described below in more detail with reference to the drawings.
FIG. 5 is a view illustrating the structure of a frame, a subframe, and a slot of a 5G communication system.
FIG. 5 illustrates an example of the structure of a frame 500 , a subframe 501 , and slots 502 , 503 , and 504 for each of the case where μ=0 ( 505 ) indicating a subcarrier spacing of 15 kHz and the case where μ=1 ( 506 ) indicating a subcarrier spacing of 30 kHz. In the case of a 5G system as shown in FIG. 5 , one frame 500 may be defined as 10 ms. One subframe 501 may be defined as 1 ms, and thus, one frame 500 may consist of a total of 10 subframes 501 . One subframe 501 may be constituted of one or a plurality of slots. One slot may be constituted of or defined with 14 OFDM symbols. In other words, the number (N symb slot ) of symbols per slot may be 14. In this case, the number (N symb subframe,μ ) of slots per subframe 501 may vary depending on the value (numerology) μ ( 505 , 506 ) indicating the configuration for subcarrier spacing. When μ=0, one subframe 501 may be constituted of one slot 502 , and when μ=1, one subframe 501 may be constituted of two slots 503 and 504 .
According to the set subcarrier spacing value μ, the number of slots per subframe may vary, and accordingly, the number (N symb frame,μ ) of slots per frame may differ. Each set subcarrier spacing value μ and N symb subframe,μ and N symb frame,μ according to μ may be defined as in Table 1 below. When μ=2, the UE may additionally receive a configuration regarding a cyclic prefix from the base station through higher layer signaling.
TABLE 1
Îf = 2 μ</
CLAIMS
Claims ( 20 )
The invention claimed is:
1 . A method for configuring a frequency domain resource for uplink transmission or downlink reception performed by a user equipment (UE) in a wireless communication system, the method comprising:
identifying a guard band configured in a bandwidth of a cell or a bandwidth part configured for the UE; identifying one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part; identifying whether configuration information on a type of a resource block set is received; in case that the configuration information is received, determining whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set, based on the configuration information; and in case that the configuration information is not received, determining whether the type of each resource block set is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
2 . The method of claim 1 ,
wherein the one or more resource block sets are identified using the guard band, and wherein the guard band is predefined or is selected from among a plurality of frequency bands configured through higher layer signaling.
3 . The method of claim 1 , further comprising:
determining the guard band and a frequency area of the one or more resource block sets using predefined resource block set pattern information, wherein the guard band and the predefined resource block set pattern information are defined according to a subcarrier spacing and a size of the bandwidth or a size of the bandwidth part.
4 . The method of claim 1 , further comprising:
in case that the configuration information is not received, determining that, for a time range which is a downlink bandwidth or downlink bandwidth part, all of the one or more resource block sets are downlink resource block sets and, for a time range which is an uplink bandwidth or uplink bandwidth part, all of the one or more resource block sets are uplink resource block sets.
5 . The method of claim 1 , further comprising:
receiving downlink control information (DCI); and determining whether a resource block set determined to be the flexible resource block set is to be used for the downlink reception or the uplink transmission, based on a channel or signal scheduled by the DCI in the resource block set determined to be the flexible resource block set, wherein the channel or signal includes one or more of a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), an aperiodic channel state information reference signal (CSI-RS), a sounding reference signal (SRS), or a physical random access channel (PRACH).
6 . The method of claim 1 , further comprising:
receiving downlink control information (DCI); and determining whether a flexible resource block set scheduled in the DCI is the downlink resource block set or the uplink resource block set, based on an indicator included in the DCI, wherein the indicator includes a bitmap in the same size as the number of flexible resource block sets scheduled in the DCI or indicator information indicating that each of at least one flexible resource block set included in one of an uplink or downlink cell, carrier, or bandwidth part is one of a downlink resource block set, a flexible resource block set, or an uplink resource block set.
7 . The method of claim 1 , further comprising:
receiving downlink control information (DCI); in case that a flexible resource block set scheduled in the DCI is included in a downlink bandwidth part, determining whether the downlink reception is possible in the flexible resource block set based on an indicator included in the DCI; and in case that the flexible resource block set scheduled in the DCI is included in an uplink bandwidth part, determining whether the uplink transmission is possible in the flexible resource block set based on the indicator included in the DCI.
8 . A method for configuring a frequency domain resource for uplink reception or downlink transmission performed by a base station in a wireless communication system, the method comprising:
configuring a user equipment (UE) with information indicating a guard band in a bandwidth of a cell or a bandwidth part configured for the UE; configuring the UE with information indicating one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part; determining whether to transmit configuration information on a type of a resource block set; in case that the configuration information is determined to transmit, providing, to the UE, the configuration information on the type of the resource block set, wherein the configuration information includes information for determining whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set; and in case that the configuration information is determined not to transmit, determining whether the type of each resource block set is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
9 . The method of claim 8 , wherein the guard band is predefined or is selected from among a plurality of frequency bands configured through higher layer signaling.
10 . The method of claim 8 , further comprising:
transmitting downlink control information (DCI) to the UE, wherein whether a resource block set determined to be the flexible resource block set is to be used for the downlink transmission or the uplink reception is determined according to a channel or signal scheduled by the DCI, and wherein the channel or signal includes one or more of a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), an aperiodic channel state information reference signal (CSI-RS), a sounding reference signal (SRS), or a physical random access channel (PRACH).
11 . The method of claim 8 , further comprising:
transmitting downlink control information (DCI) to the UE, wherein the DCI includes an indicator for determining whether a flexible resource block set scheduled in the DCI is the downlink resource block set or the uplink resource block set, and wherein the indicator includes a bitmap in the same size as the number of flexible resource block sets scheduled in the DCI or indicator information indicating that each of at least one flexible resource block set included in one of an uplink or downlink cell, carrier, or bandwidth part is one of a downlink resource block set, a flexible resource block set, or an uplink resource block set.
12 . A user equipment (UE) for configuring a frequency domain resource for uplink transmission or downlink reception in a wireless communication system, comprising:
a communication unit; and a controller, wherein the controller is configured to:
identify a guard band configured in a bandwidth of a cell or a bandwidth part configured for the UE;
identify one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part;
identify whether configuration information about a type of a resource block set is received;
in case that the configuration information is received, determine whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set, based on the configuration information; and
in case that the configuration information is not received, determine whether the type of each resource block set is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
13 . The UE of claim 12 , wherein the controller is further configured to:
receive a DCI; and determine whether a flexible resource block set scheduled in the DCI is the downlink resource block set or the uplink resource block set, based on an indicator included in the DCI, wherein the indicator includes a bitmap in the same size as the number of flexible resource block sets scheduled in the DCI or indicator information indicating that each of at least one flexible resource block set included in one of an uplink or downlink cell, carrier, or bandwidth part is one of a downlink resource block set, a flexible resource block set, or an uplink resource block set.
14 . The UE of claim 12 ,
wherein the one or more resource block sets are identified using the guard band, and wherein the guard band is predefined or is selected from among a plurality of frequency bands configured through higher layer signaling.
15 . The UE of claim 12 , wherein the controller is further configured to:
determine the guard band and a frequency area of the one or more resource block sets using predefined resource block set pattern information, wherein the guard band and the predefined resource block set pattern information are defined according to a subcarrier spacing and a size of the bandwidth or a size of the bandwidth part.
16 . The UE of claim 12 , wherein the controller is further configured to:
in case that the configuration information is not received, determine that, for a time range which is a downlink bandwidth or downlink bandwidth part, all of the one or more resource block sets are downlink resource block sets and, for a time range which is an uplink bandwidth or uplink bandwidth part, all of the one or more resource block sets are uplink resource block sets.
17 . The UE of claim 12 , wherein the controller is further configured to:
receiving downlink control information (DCI); and determining whether a resource block set determined to be the flexible resource block set is to be used for the downlink reception or the uplink transmission, based on a channel or signal scheduled by the DCI in the resource block set determined to be the flexible resource block set, wherein the channel or signal includes one or more of a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), an aperiodic channel state information reference signal (CSI-RS), a sounding reference signal (SRS), or a physical random access channel (PRACH).
18 . The UE of claim 12 , wherein the controller is further configured to:
receiving downlink control information (DCI); in case that a flexible resource block set scheduled in the DCI is included in a downlink bandwidth part, determining whether the downlink reception is possible in the flexible resource block set based on an indicator included in the DCI; and in case that the flexible resource block set scheduled in the DCI is included in an uplink bandwidth part, determining whether the uplink transmission is possible in the flexible resource block set based on the indicator included in the DCI.
19 . A base station for configuring a frequency domain resource for uplink reception or downlink transmission in a wireless communication system, comprising:
a communication unit; and a controller, coupled to the communication unit and configured to:
configure a user equipment (UE) with information indicating a guard band in a bandwidth of a cell or a bandwidth part configured for the UE;
configure the UE with information indicating one or more resource block sets in a resource region except for the guard band in the bandwidth or the bandwidth part; and
determine whether to transmit configuration information on a type of a resource block set,
in case that the configuration information is determined to transmit, provide, to the UE, the configuration information on the type of the resource block set, wherein the configuration information includes information for determining whether a type of each resource block set is a downlink resource block set, an uplink resource block set, or a flexible resource block set, and
in case that the configuration information is determined not to transmit, determine whether the type of each resource block set is the downlink resource block set, the uplink resource block set, or the flexible resource block set based on whether the bandwidth or the bandwidth part is for the uplink transmission or the downlink reception.
20 . The base station of claim 19 , wherein the controller is further configured to:
transmit downlink control information (DCI) to the UE, wherein the DCI includes an indicator for determining whether a flexible resource block set scheduled in the DCI is the downlink resource block set or the uplink resource block set, and wherein the indicator includes a bitmap in the same size as the number of flexible resource block sets scheduled in the DCI or indicator information indicating that each of at least one flexible resource block set included in one of an uplink or downlink cell, carrier, or bandwidth part is one of a downlink resource block set, a flexible resource block set, or an uplink resource block set.
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