KR20230107168A - Method and apparatus for determination of uplink resource in wirelss communication system - Google Patents

Abstract

The present disclosure relates to a communication technique and a system for converging a 5G communication system with IoT technology to support a higher data rate after a 4G system. This disclosure provides intelligent services based on 5G communication technology and IoT-related technologies (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety related services, etc.) ) can be applied. The present invention discloses a method for setting uplink control channel transmission resources in a next-generation mobile communication system.

Description

Uplink resource setting method and apparatus in wireless communication system {METHOD AND APPARATUS FOR DETERMINATION OF UPLINK RESOURCE IN WIRELSS COMMUNICATION SYSTEM}

The present invention relates to a wireless communication system, and more particularly, to a method for setting uplink control channel transmission resources in a next-generation mobile communication system.

Efforts are being made to develop an improved 5G communication system or pre-5G communication system in order to meet the growing demand for wireless data traffic after the commercialization of the 4G communication system. For this reason, the 5G communication system or pre-5G communication system is being called a system after a 4G network (Beyond 4G Network) communication system or an LTE system (Post LTE). In order to achieve a high data rate, the 5G communication system is being considered for implementation in a mmWave band (eg, a 60 gigabyte (60 GHz) band). In order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used in 5G communication systems. ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed. In addition, to improve the network of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud RAN), and an ultra-dense network , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation etc. are being developed. In addition, in the 5G system, advanced coding modulation (Advanced Coding Modulation: ACM) methods FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), advanced access technologies FBMC (Filter Bank Multi Carrier), NOMA (non orthogonal multiple access) and SCMA (sparse code multiple access) are being developed.

Meanwhile, the Internet is evolving from a human-centered connection network in which humans create and consume information to an Internet of Things (IoT) network in which information is exchanged and processed between distributed components such as things. IoE (Internet of Everything) technology, which combines IoT technology with big data processing technology through connection with cloud servers, etc., is also emerging. In order to implement IoT, technical elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, and recently, sensor networks for connection between objects and machine to machine , M2M), and MTC (Machine Type Communication) technologies are being studied. In an IoT environment, intelligent IT (Internet Technology) services that create new values in human life by collecting and analyzing data generated from connected objects can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical service, etc. can be applied to

Accordingly, various attempts have been made to apply the 5G communication system to the IoT network. For example, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) are implemented by techniques such as beamforming, MIMO, and array antenna. There is. The application of the cloud radio access network (cloud RAN) as the big data processing technology described above can be said to be an example of convergence of 5G technology and IoT technology.

Recently, with the development of LTE (Long Term Evolution) and LTE-Advanced, an uplink control channel transmission resource setting and apparatus are required in a next-generation mobile communication system.

The 5G wireless communication system is intended to support not only services requiring high transmission rates, but also services with very short transmission delays and services requiring high connection density, unlike conventional ones. In these scenarios, one system should be able to provide various services with different transmission/reception techniques and transmission/reception parameters in order to satisfy the various requirements and services of users. It is important to design it so that no system-limited constraints arise. Inevitably, 5G must be able to use time and frequency resources more flexibly than in existing LTE. Among them, securing flexibility is one of the most important issues in designing a control channel. For this purpose, in the 5G communication system, the downlink control channel may not be transmitted over the entire system band but may be transmitted in a specific subband, and time and frequency resources for transmitting the downlink control channel may be set for each terminal. .

In order to achieve high-speed data service up to several Gbps in the 5G system, transmission and reception of ultra-wide bandwidth signals of tens to hundreds of MHz or several GHz are being considered. However, since power consumption increases in proportion to a transmission/reception bandwidth, it is necessary to efficiently manage power consumption of a terminal or a base station by adjusting a transmission/reception bandwidth. The base station may be always supplied with power, whereas the terminal has a relatively higher need for efficient power consumption management due to battery capacity limitations. Therefore, when transmission/reception of a signal with an ultra-wide bandwidth is not required for the terminal, the base station can efficiently manage power consumption of the terminal by changing the transmission/reception bandwidth of the terminal to a narrow bandwidth.

As described above, in the operation in which the transmission and reception bandwidth of the terminal is adjusted (adaptation) or changed (switching), the base station determines whether the downlink control channel is transmitted according to the case where each transmission and reception bandwidth is adjusted (Control Resource Set) or Resources, etc. through which the uplink control channel (PUCCH) is transmitted must be efficiently set to the terminal. Therefore, the present invention proposes a method of setting a resource region for an uplink control channel in an environment in which a transmission/reception bandwidth for a terminal is adjusted.

The present invention for solving the above problems is a control signal processing method in a wireless communication system, comprising: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal generated based on the processing to the base station.

As described above, the present invention provides a method and apparatus for setting resources of an uplink control channel and an uplink data channel in a 5G communication system so that the 5G system can be operated more efficiently.

1 is a diagram showing the basic structure of time-frequency domain in LTE
2 is a diagram showing PDCCH and EPDCCH, which are downlink control channels of LTE.
3 is a diagram illustrating a downlink control channel;
4 is a diagram illustrating a method of allocating a resource region for a 5G downlink control channel;
5 is a diagram illustrating a method of allocating a resource region for a 5G uplink control channel;
6 is a diagram showing 5G bandwidth part setting and uplink control channel resource setting;
7 is a view showing a first embodiment of the present invention
8 is a view showing a second embodiment of the present invention
9 is a view showing a first embodiment of the present invention
10 is a diagram illustrating terminal operation according to the first embodiment of the present invention;
11 is a diagram illustrating terminal operation according to a second embodiment of the present invention
12 is a block diagram showing the internal structure of a terminal according to an embodiment of the present invention.
13 is a block diagram showing the internal structure of a base station according to an embodiment of the present invention.
14 is a view showing a third embodiment of the present invention

In describing the embodiments in this specification, descriptions of technical contents that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention without obscuring it by omitting unnecessary description.

For the same reason, in the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated. Also, the size of each component does not fully reflect the actual size. In each drawing, the same reference number is given to the same or corresponding component.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, but only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

At this time, it will be understood that each block of the process flow chart diagrams and combinations of the flow chart diagrams can be performed by computer program instructions. These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment are described in the flowchart block(s). It creates means to perform functions. These computer program instructions may also be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular way, such that the computer usable or computer readable memory The instructions stored in are also capable of producing an article of manufacture containing instruction means that perform the functions described in the flowchart block(s). The computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to generate computer or other programmable data processing equipment. Instructions for performing processing equipment may also provide steps for carrying out the functions described in the flowchart block(s).

Additionally, each block may represent a module, segment or portion of code that includes one or more executable instructions for executing specified logical function(s). It should also be noted that in some alternative implementations it is possible for the functions mentioned in the blocks to occur out of order. For example, two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in reverse order depending on their function.

At this time, the term '~unit' used in this embodiment means software or a hardware component such as FPGA or ASIC, and '~unit' performs certain roles. However, '~ part' is not limited to software or hardware. '~bu' may be configured to be in an addressable storage medium and may be configured to reproduce one or more processors. Therefore, as an example, '~unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. Functions provided within components and '~units' may be combined into smaller numbers of components and '~units' or further separated into additional components and '~units'. In addition, components and '~units' may be implemented to play one or more CPUs in a device or a secure multimedia card.

The wireless communication system has moved away from providing voice-oriented services in the early days and, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2's High Rate Packet Data (HRPD), UMB (Ultra Mobile Broadband), and IEEE's 802.16e. evolving into a communication system.

As a representative example of the broadband wireless communication system, in the LTE system, an Orthogonal Frequency Division Multiplexing (OFDM) method is employed in downlink (DL), and SC-FDMA (Single Carrier Frequency Division Multiplexing) in uplink (UL) Access) method is used. Uplink refers to a radio link in which a terminal (UE (User Equipment) or MS (Mobile Station)) transmits data or control signals to a base station (eNode B or base station (BS)), and downlink refers to a radio link in which a base station transmits a terminal to a terminal. A radio link that transmits data or control signals. The above multiple access scheme distinguishes data or control information for each user by allocating and operating time-frequency resources to carry data or control information for each user so that they do not overlap each other, that is, so that orthogonality is established. do.

As a future communication system after LTE, that is, a 5G communication system, since it should be able to freely reflect various requirements such as users and service providers, a service that satisfies various requirements at the same time must be supported. Services considered for the 5G communication system include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra reliability low latency communication (URLLC), etc. there is

eMBB aims to provide a data transmission rate that is more improved than that supported by existing LTE, LTE-A or LTE-Pro. For example, in a 5G communication system, an eMBB must be able to provide a peak data rate of 20 Gbps in downlink and a peak data rate of 10 Gbps in uplink from the perspective of one base station. In addition, the 5G communication system should provide a maximum transmission rate and, at the same time, an increased user perceived data rate of the terminal. In order to satisfy these requirements, various transmission/reception technologies are required to be improved, including a more advanced Multi Input Multi Output (MIMO) transmission technology. In addition, while signals are transmitted using a maximum 20MHz transmission bandwidth in the 2GHz band currently used by LTE, the 5G communication system uses a frequency bandwidth wider than 20MHz in a frequency band of 3 to 6GHz or 6GHz or higher to meet the requirements of the 5G communication system. data transfer rate can be satisfied.

At the same time, mMTC is being considered to support application services such as Internet of Things (IoT) in 5G communication systems. In order to efficiently provide the Internet of Things, mMTC requires access support for large-scale terminals within a cell, improved coverage of terminals, improved battery time, and reduced terminal cost. Since the Internet of Things is attached to various sensors and various devices to provide communication functions, it must be able to support a large number of terminals (eg, 1,000,000 terminals/km2) in a cell. In addition, terminals supporting mMTC are likely to be located in shadow areas that are not covered by cells, such as the basement of a building due to the nature of the service, so they require wider coverage than other services provided by the 5G communication system. A terminal supporting mMTC must be configured as a low-cost terminal, and since it is difficult to frequently replace a battery of the terminal, a very long battery life time such as 10 to 15 years is required.

Finally, in the case of URLLC, it is a cellular-based wireless communication service used for a specific purpose (mission-critical). For example, remote control of robots or machinery, industrial automation, unmaned aerial vehicles, remote health care, emergency situations. A service used for emergency alert or the like may be considered. Therefore, the communication provided by URLLC must provide very low latency and very high reliability. For example, a service supporting URLLC needs to satisfy an air interface latency of less than 0.5 milliseconds, and at the same time has a requirement of a packet error rate of 10-5 or less. Therefore, for a service that supports URLLC, a 5G system must provide a smaller transmit time interval (TTI) than other services, and at the same time, a design that allocates wide resources in the frequency band to secure the reliability of the communication link. matter is required

The three services of 5G, namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted in one system. At this time, different transmission/reception techniques and transmission/reception parameters may be used between services in order to satisfy different requirements of each service.

Hereinafter, the frame structure of the LTE and LTE-A systems will be described in more detail with reference to the drawings.

1 is a diagram showing the basic structure of a time-frequency domain, which is a radio resource domain in which the data or control channel is transmitted in downlink in a system in LTE.

In FIG. 1, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol. Nsymb (101) OFDM symbols are gathered to form one slot (102), and two slots are gathered to form one subframe (103). The length of the slot is 0.5 ms, and the length of the subframe is 1.0 ms. And, the radio frame 104 is a time domain unit consisting of 10 subframes. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth consists of a total of N _BW (105) subcarriers. The basic unit of resources in the time-frequency domain is a resource element (106, Resource Element, RE), which can be represented by an OFDM symbol index and a subcarrier index. A resource block (107, Resource Block, RB or Physical Resource Block, PRB) is defined as Nsymb (101) consecutive OFDM symbols in the time domain and N _RB (108) consecutive subcarriers in the frequency domain. Accordingly, one RB 108 is composed of N _symb x N _RB REs 106 . In general, the minimum transmission unit of data is the RB unit. In an LTE system, N _symb = 7 and N _{RB =} 12, and N _BW and N _RB are proportional to the bandwidth of the system transmission band.

Next, downlink control information (DCI) in LTE and LTE-A systems will be described in detail.

In the LTE system, scheduling information for downlink data or uplink data is transmitted from a base station to a terminal through DCI. DCI defines various formats, whether it is scheduling information for uplink data or scheduling information for downlink data, whether it is a compact DCI with a small size of control information, and applying spatial multiplexing using multiple antennas. DCI format is applied and operated depending on whether DCI is used for power control or not. For example, DCI format 1, which is scheduling control information for downlink data, is configured to include at least the following control information.

- Resource allocation type 0/1 flag: Notifies whether the resource allocation method is type 0 or type 1. Type 0 allocates resources in RBG (resource block group) units by applying a bitmap method. In the LTE system, a basic unit of scheduling is a resource block (RB) represented by time and frequency domain resources, and an RBG is composed of a plurality of RBs to become a basic unit of scheduling in the type 0 scheme. Type 1 allows a specific RB to be allocated within an RBG.

- Resource block assignment: RBs allocated for data transmission are notified. The resource to be expressed is determined according to the system bandwidth and resource allocation method.

- Modulation and coding scheme (MCS): Notifies the modulation scheme used for data transmission and the size of the transport block, which is the data to be transmitted.

- HARQ process number: Notifies the HARQ process number.

- New data indicator: Notifies whether it is HARQ initial transmission or retransmission.

- Redundancy version: Notifies the redundancy version of HARQ.

- Transmit Power Control (TPC) command for PUCCH (Physical Uplink Control CHannel): Notifies a transmit power control command for PUCCH, which is an uplink control channel.

The DCI is transmitted through PDCCH or EPDCCH (Enhanced PDCCH), which is a downlink physical control channel, through channel coding and modulation processes.

A Cyclic Redundancy Check (CRC) is attached to the DCI message payload, and the CRC is scrambled with a Radio Network Temporary Identifier (RNTI) corresponding to the identity of the terminal. Different RNTIs are used according to the purpose of the DCI message, eg, UE-specific data transmission, power control command, or random access response. Soon, the RNTI is not transmitted explicitly but is included in the CRC calculation process and transmitted. Upon receiving the DCI message transmitted on the PDCCH, the terminal checks the CRC using the allocated RNTI, and if the CRC check result is correct, it can be known that the corresponding message has been transmitted to the terminal.

2 is a diagram illustrating PDCCH 201 and Enhanced PDCCH 202 (EPDCCH), which are downlink physical channels through which DCI of LTE is transmitted.

According to FIG. 2, PDCCH 201 is time multiplexed with PDSCH 203, which is a data transmission channel, and transmitted over the entire system bandwidth. The area of the PDCCH 201 is represented by the number of OFDM symbols, which is indicated to the terminal by a Control Format Indicator (CFI) transmitted through a Physical Control Format Indicator Channel (PCFICH). By allocating the PDCCH 201 to the OFDM symbol coming at the beginning of the subframe, the UE can decode the downlink scheduling assignment as quickly as possible, thereby reducing the decoding delay for the Downlink Shared Channel (DL-SCH), that is, the overall downlink There is an advantage of reducing link transmission delay. Since one PDCCH carries one DCI message and multiple UEs can be simultaneously scheduled for downlink and uplink, multiple PDCCHs are simultaneously transmitted in each cell. A CRS (204) is used as a reference signal for decoding the PDCCH (201). The CRS 204 is transmitted every subframe over the entire band, and scrambling and resource mapping vary according to cell ID (Identity). Since the CRS 204 is a reference signal commonly used by all terminals, terminal-specific beamforming cannot be used. Therefore, the multi-antenna transmission method for the PDCCH of LTE is limited to open-loop transmission diversity. The number of ports of the CRS is implicitly known to the UE from decoding of the PBCH (Physical Broadcast Channel).

Resource allocation of the PDCCH 201 is based on a Control-Channel Element (CCE), and one CCE is composed of 9 Resource Element Groups (REGs), that is, a total of 36 Resource Elements (REs). The number of CCEs required for a specific PDCCH 201 may be 1, 2, 4, or 8, which varies depending on the channel coding rate of the DCI message payload. As such, different numbers of CCEs are used to implement link adaptation of the PDCCH 201. The terminal needs to detect a signal without knowing information about the PDCCH 201. In LTE, a search space representing a set of CCEs is defined for blind decoding. The search space is composed of a plurality of sets at the aggregation level (AL) of each CCE, which is not explicitly signaled but implicitly defined through a function and subframe number according to the UE identity. Within each subframe, the UE decodes the PDCCH 201 for all possible resource candidates that can be created from CCEs within the configured search space, and information declared valid for the corresponding UE through CRC check. to process

The search space is classified into a terminal-specific search space and a common search space. A certain group of terminals or all terminals can search the common search space of the PDCCH 201 in order to receive cell-common control information such as dynamic scheduling of system information or paging messages. For example, scheduling allocation information of a DL-SCH for transmission of System Information Block (SIB)-1 including cell operator information may be received by examining the common search space of the PDCCH 201.

According to FIG. 2, the EPDCCH 202 is frequency multiplexed with the PDSCH 203 and transmitted. The base station can appropriately allocate the resources of the EPDCCH 202 and the PDSCH 203 through scheduling, thereby effectively supporting coexistence with data transmission for the existing LTE terminal. However, since the EPDCCH 202 is allocated and transmitted in one entire subframe on the time axis, there is a problem in that there is a loss in terms of transmission delay time. A plurality of EPDCCHs 202 constitute one EPDCCH 202 set, and the allocation of the EPDCCH 202 set is performed in units of Physical Resource Block (PRB) pairs. Location information for the EPDCCH set is configured UE-specifically and is signaled through Remote Radio Control (RRC). Up to two EPDCCH 202 sets can be set for each terminal, and one EPDCCH 202 set can be simultaneously multiplexed and set to different terminals.

Resource allocation of the EPDCCH 202 is based on ECCE (Enhanced CCE), and one ECCE can consist of 4 or 8 EREGs (Enhanced REGs), and the number of EREGs per ECCE is CP length and subframe setting information depends on One EREG consists of 9 REs, so 16 EREGs can exist per PRB pair. The EPDCCH transmission method is classified into localized/distributed transmission according to the RE mapping method of EREG. The aggregation level of ECCE can be 1, 2, 4, 8, 16, or 32, which is determined by the CP length, subframe configuration, EPDCCH format, and transmission method.

EPDCCH 202 supports only a UE-specific search space. Therefore, a UE that wants to receive a system message must search for a common search space on the existing PDCCH 201.

In the EPDCCH 202, a Demodulation Reference Signal (DMRS) 205 is used as a reference signal for decoding. Therefore, precoding for the EPDCCH 202 can be configured by the base station, and UE-specific beamforming can be used. Through the DMRS 205, UEs can perform decoding on the EPDCCH 202 without knowing which precoding is used. EPDCCH (202) uses the same pattern as the DMRS of PDSCH (203). However, unlike the PDSCH 203, the DMRS 205 on the EPDCCH 202 can support transmission using up to four antenna ports. The DMRS 205 is transmitted only in the corresponding PRB through which the EPDCCH is transmitted.

The port configuration information of the DMRS (205) varies according to the EPDCCH (202) transmission method. In the case of a localized transmission scheme, an antenna port corresponding to an ECCE to which the EPDCCH 202 is mapped is selected based on the ID of the terminal. When different terminals share the same ECCE, that is, when multiuser MIMO transmission is used, a DMRS antenna port may be allocated to each terminal. Alternatively, the DMRS 205 may be shared and transmitted. In this case, it may be divided into a DMRS 205 scrambling sequence configured by higher layer signaling. In the case of a distributed transmission method, up to two antenna ports of the DMRS 205 are supported, and a diversity technique of a precoder cycling method is supported. DMRS 205 may be shared for all REs transmitted within one PRB pair.

In the above, a downlink control channel transmission method in conventional LTE and LTE-A and an RS for decoding it have been described.

Hereinafter, a downlink control channel in the currently discussed 5G communication system will be described in more detail with reference to the drawings.

3 is a diagram showing an example of basic units of time and frequency resources constituting a downlink control channel that can be used in 5G. According to FIG. 3, it may be named as a basic unit (REG, NR (New Radio)-REG) of time and frequency resources constituting a control channel. Hereinafter, in the present invention, it is named NR-REG 303. ) is composed of 1 OFDM symbol 301 on the time axis and composed of 12 subcarriers 302, that is, 1 RB, on the frequency axis. In configuring the basic unit of the control channel, by assuming that the time axis basic unit is 1 OFDM symbol 301, the data channel and the control channel can be time-multiplexed within one subframe. By locating the control channel ahead of the data channel, the user's processing time can be reduced, making it easy to satisfy the latency requirement. By setting the basic unit of the frequency axis of the control channel to 1 RB 302, frequency multiplexing between the control channel and the data channel can be performed more efficiently.

Control channel regions of various sizes can be set by concatenating the NR-REGs 303 shown in FIG. 3 . For example, when a basic unit to which a downlink control channel is allocated in 5G is an NR-CCE 304, 1 NR-CCE 304 may include a plurality of NR-REGs 303. Describing the NR-REG 304 shown in FIG. 3 as an example, the NR-REG 303 can be composed of 12 REs, and 1 NR-CCE 304 is divided into 4 NR-REGs 303. If configured, it means that 1 NR-CCE 304 can be configured with 48 REs. When a downlink control region is set, the corresponding region can be composed of a plurality of NR-CCEs 304, and a specific downlink control channel is one or more NR-CCEs 304 according to the aggregation level (AL) in the control region. It can be mapped to and transmitted. The NR-CCEs 304 in the control area are classified by number, and at this time, the number can be assigned according to a logical mapping method.

The basic unit of the downlink control channel shown in FIG. 3, that is, the NR-REG 303, may include both REs to which DCI is mapped and a region to which the DMRS 305, which is a reference signal for decoding them, is mapped. At this time, the DMRS 305 can be efficiently transmitted considering overhead according to RS allocation. For example, when a downlink control channel is transmitted using a plurality of OFDM symbols, the DMRS 305 may be transmitted only in the first OFDM symbol. The DMRS 305 may be mapped and transmitted considering the number of antenna ports used to transmit the downlink control channel. The diagram shown in FIG. 3 shows an example in which two antenna ports are used. At this time, a DMRS 306 transmitted for antenna port #0 and a DMRS 307 transmitted for antenna port #1 may exist. DMRS for different antenna ports can be multiplexed in various ways. 3 shows an example in which DMRSs corresponding to different antenna ports are orthogonally transmitted in different REs. In this way, it can be transmitted after being FDM, or it can be transmitted after being CDM. In addition, various types of DMRS patterns may exist, which may be associated with the number of antenna ports. Hereinafter, in describing the present invention, it is assumed that two antenna ports are used. The same principle in the present invention can be applied to the number of antenna ports of 2 or more.

4 is a diagram illustrating an example of a control resource set in which a downlink control channel is transmitted in a 5G wireless communication system. 4, system bandwidth 410 on the frequency axis and 1 slot 420 on the time axis (in the example of FIG. 4, 1 slot is assumed to be 7 OFDM symbols, but it is also applicable to the case of 14 symbols.) In FIG. 4, the entire system The bandwidth 410 is one bandwidth part (Bandwidth Part or BWP) or a plurality of bandwidth parts (eg, in FIG. 4, bandwidth part #1 402, bandwidth part #2 403, bandwidth part #3 404, bandwidth portion #4 (four bandwidth portions of 405)). At this time, it is also possible to be composed of a bandwidth portion including one or more bandwidth portions, such as bandwidth portion #5 (406). 4 shows an example in which two control areas (control area #1 440 and control area #2 450) are set. The control regions 440 and 450 may be set to specific subbands within the entire system bandwidth 410 on the frequency axis. For example, in FIG. 4, control area #1 (440) is set across bandwidth part #1 (402) and bandwidth part #2 (403), and control area #2 (450) is bandwidth part #4 (405). is set within The time axis can be set to one or a plurality of OFDM symbols, and this can be defined as a control region length (Control Resource Set Duration, 460, 470). In the example of FIG. 4, control region #1 (440) is set to control region length #1 (460) of 2 symbols, and control region #2 (450) is set to control region length #2 (470) of 1 symbol. It is set.

In 5G, multiple control areas can be set in one system from the point of view of a base station. Also, from the point of view of the terminal, a plurality of control regions may be set for one terminal. In addition, a control area of some of the control areas set in the system may be set for the terminal. Accordingly, the terminal may not know whether a specific control area exists in the system. As a specific example, in FIG. 4, two control areas, control area #1 (440) and control area #2 (450) are set in the system, and control area #1 (440) is set for terminal #1. and control area #1 440 and control area #2 450 may be set for terminal #2. At this time, if there is no additional indicator, terminal #1 may not know whether control region #2 450 exists.

The control region in 5G described above may be set as a common control region, UE-group common, or UE-specific. The control region may be configured for each UE through UE-specific signaling, UE group common signaling, or RRC signaling. Setting the control region to the terminal means providing information such as the location of the control region, subbands, resource allocation of the control region, and the length of the control region. For example, it may include the following information.

[Table 1]

In addition to the above setting information, various pieces of information necessary for transmitting a downlink control channel may be set in the terminal.

5 is a diagram illustrating an example of a structure of an uplink control channel (PUCCH) in a 5G wireless communication system. In FIG. 5, a method for transmitting an uplink control channel by determining the transmission interval (or start symbol and end symbol position or start symbol and number of transmission symbols) of a long PUCCH based on a slot is described, but minislot (or slot It can also be applied when the terminal determines the long PUCCH transmission period based on a slot composed of fewer symbols than the number of symbols constituting the uplink control channel. At this time, in the present invention, an uplink control channel having a short transmission period (for example, an uplink control channel composed of one or two symbols) is called Short PUCCH to minimize transmission delay, and long transmission is performed to obtain sufficient cell coverage. An uplink control channel having a duration (eg, an uplink control channel consisting of four or more symbols) is referred to as a long PUCCH.

5 shows how the Long PUCCH and the Short PUCCH are multiplexed in the frequency domain (FDM, 500) or multiplexed in the time domain (TDM, 501). First, in FIG. 5, a slot structure in which long PUCCH and short PUCCH are multiplexed will be described. In the present invention, the basic unit of signal transmission will be described as a slot, but it may be used under various names such as a subframe or a transmission time interval (TTI). 520 and 521 of FIG. 5 show a UL-centric slot in which symbols constituting the slot are mainly used for uplink. In the uplink center slot, most of the OFDM symbols used for uplink are used, and it is possible to use all OFDM symbols for uplink transmission, or a few OFDM symbols in the front or back are used for downlink transmission. It can also be used, and when downlink and uplink exist simultaneously in one slot, a transmission interval (or gap) may exist between the two. In FIG. 5, the first OFDM symbol in one slot is used for downlink transmission, for example, downlink control channel transmission 502, and an example in which the third OFDM symbol to the last symbol of the slot is used for uplink transmission is shown. . The second OFDM symbol is used as a transmission interval. In the uplink transmission, uplink data channel transmission and uplink control channel transmission are possible.

Next, the long PUCCH 503 will be described. Since a control channel with a long transmission period is used for the purpose of increasing cell coverage, it can be transmitted in a DFT-S-OFDM scheme, which is a single carrier transmission, rather than OFDM transmission. Therefore, at this time, it must be transmitted using only contiguous subcarriers, and in order to obtain a frequency diversity effect, an uplink control channel with a long transmission period is configured at separate locations such as 508 and 509. In terms of frequency, the distance 505 is separated from the uplink bandwidth supported by the terminal or the uplink bandwidth set for the terminal. It transmits using PRB-2 as in In the above, a PRB is a physical resource block, which means a minimum transmission unit on the frequency side, and can be defined as 12 subcarriers. Therefore, the frequency side distance of PRB-1 and PRB-2 must be equal to or smaller than the maximum supported bandwidth of the UE or the uplink transmission bandwidth set for the UE, and the maximum supported bandwidth of the UE must be equal to or smaller than the bandwidth 506 supported by the system. can The frequency resources PRB-1 and PRB-2 may be set to the terminal by an upper signal, the frequency resources are mapped to a bit field by the upper signal, and which frequency resource is to be used is indicated by a bit field included in a downlink control channel. may be indicated to the terminal by In addition, the control channel transmitted in the front part of the slot of 508 and the control channel transmitted in the rear part of the slot of 509 are composed of the uplink control information (UCI) of 510 and the terminal reference signal 511, respectively. It is assumed that it is transmitted in an OFDM symbol.

Next, the short PUCCH 518 will be described. Short PUCCH can be transmitted in both the downlink center slot and the uplink center slot, and is generally the last symbol of the slot, or the OFDM symbol at the end (eg, the last OFDM symbol or the second-to-last OFDM symbol, or the last 2 OFDM symbol). Of course, it is also possible to transmit the Short PUCCH at an arbitrary position within a slot. Also, the Short PUCCH may be transmitted using one OFDM symbol or a plurality of OFDM symbols. In FIG. 5, a case in which Short PUCCH is transmitted in the last symbol 518 of a slot is illustrated. Radio resources for Short PUCCH are allocated in units of PRBs on the frequency side, and a plurality of contiguous PRBs may be allocated or a plurality of PRBs spaced apart in a frequency band may be allocated as the allocated PRBs. In addition, the allocated PRB must be included in a frequency band 507 supported by the terminal or a band equal to or smaller than the uplink transmission bandwidth set by the base station. The plurality of PRBs, which are the allocated frequency resources, can be set to the terminal by an upper layer signal, the frequency resources are mapped to a bit field by the upper layer signal, and which frequency resource is to be used is determined by the bit field included in the downlink control channel. It may be instructed to the terminal. And, within one PRB, the uplink control information 520 and the demodulation reference signal 521 need to be multiplexed in a frequency band. A method of transmitting a demodulation reference signal on one subcarrier per every two symbols as in 512, Alternatively, there may be a method of transmitting a demodulation reference signal on one subcarrier for every three symbols as in 513 or a method of transmitting a demodulation reference signal on one subcarrier for every four symbols as in 514. For the demodulation signal transmission methods such as 512, 513, and 514, which method to use may be set by a higher order signal. The terminal multiplexes the demodulation reference signal and uplink control information according to the method indicated through reception of the upper signal and transmits them. Alternatively, a method of transmitting the demodulation reference signal may be determined according to the number of bits of the uplink control information 520. For example, when the number of bits of the uplink control information is small, the terminal can transmit the demodulation reference signal such as 512 through multiplexing of the uplink control information. When the number of bits of uplink control information is small, a sufficient transmission code rate can be obtained without using many resources for transmission of uplink control information. For example, when the number of bits of the uplink control information is large, the terminal can transmit the demodulation reference signal such as 514 through multiplexing of the uplink control information. When the number of bits of uplink control information is large, it is necessary to use many resources for transmission of uplink control information to lower the transmission code rate.

Whether a terminal transmits uplink control information using long PUCCH or short PUCCH in a slot or mini-slot, the long PUCCH or short PUCCH included in the upper layer signal is received by receiving a higher layer signal from the base station. It can be determined from usage information. Alternatively, whether a terminal transmits uplink control information using long PUCCH or short PUCCH in a slot or minislot, a physical signal from a base station is received and the long PUCCH or short PUCCH included in the physical signal It can be determined from usage information. Alternatively, whether a terminal transmits uplink control information using long PUCCH or short PUCCH in a slot or mini-slot can be implicitly determined based on the number of uplink symbols in the slot or mini-slot. For example, if the number of uplink symbols of a slot or mini-slot instructed or set by the base station to transmit uplink control information is 1 or 2, the uplink control information is transmitted using short PUCCH, and the number of uplink symbols of the slot or mini-slot is 4 to 14, uplink control information can be transmitted using long PUCCH. Alternatively, whether a terminal transmits uplink control information using long PUCCH or short PUCCH in a slot or mini-slot, the waveform of msg3 included in msg2 is determined during random access by the terminal. It can be determined in conjunction with the indicating information. That is, when the information indicating the waveform of msg3 included in msg2 is CP-OFDM, the terminal transmits uplink control information through short PUCCH using the CP-OFDM waveform. If the information indicating the waveform of msg3 included in msg2 is DFT-S-OFDM, the UE transmits uplink control information through long PUCCH using the DFT-S-OFDM waveform.

Next, the multiplexing of the long PUCCH and short PUCCH described above will be described. Within one slot 520, long PUCCH and short PUCCH of different terminals may be multiplexed in the frequency domain (500). At this time, the base station may configure short PUCCH and long PUCCH frequency resources of different terminals so as not to overlap as in the PRB of FIG. However, setting the transmission resources of the uplink control channel of all terminals differently regardless of scheduling is a waste of frequency, and it is not appropriate considering that limited frequency resources should be used for uplink data channel transmission rather than uplink control channel transmission. not. Accordingly, frequency resources of short PUCCH and long PUCCH of different terminals may overlap, and the base station must perform scheduling and operation so that transmission resources of different terminals do not collide in one slot. However, when collision between short PUCCH transmission resources and long PUCCH transmission resources of different terminals cannot be avoided in a specific slot, the base station needs a method to prevent long PUCCH transmission resources from colliding with short PUCCH transmission resources, and the terminal long PUCCH. It is necessary to adjust transmission resources according to the instructions of the base station. According to the above scheme, transmission resources of short PUCCH and long PUCCH can be multiplexed in the time domain within one slot 521 (501).

As described above, when the terminal is configured by dividing the downlink and uplink bandwidths into one or more bandwidth parts, the terminal considers the bandwidth part to set uplink control channel resources, and selects uplink control channel resources method, and a setting method for changing the bandwidth part is required.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it should be noted that the same components in the accompanying drawings are indicated by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted.

In addition, in the detailed description of the embodiments of the present invention, LTE and 5G systems will be the main targets, but the main gist of the present invention extends the scope of the present invention to other communication systems having similar technical backgrounds and channel types. It can be applied with slight modifications within a range that does not deviate, and this will be possible with the judgment of those skilled in the art of the present invention.

<Example 1>

6 is a diagram showing an example proposed by the present invention for a method of setting an uplink control channel structure and a resource region in a 5G wireless communication system. 6 shows an uplink system bandwidth 610 on the frequency axis and 1 slot 620 on the time axis (in the example of FIG. 6, 1 slot is assumed to be 7 OFDM symbols, but it is also applicable when it consists of 14 symbols. FIG. 6 , the uplink system bandwidth 610 includes a plurality of uplink bandwidth parts (for example, in FIG. 6, bandwidth part # 1 602, bandwidth part # 2 603, bandwidth part # 3 604, bandwidth part # 4 ( 605). At this time, it is also possible to be composed of a bandwidth part including one or more bandwidth parts, such as bandwidth part # 5 606. In addition, the terminal is configured at a specific time (symbol Alternatively, only one or a plurality of bandwidth parts can be activated and used in a slot, subframe, or frame) At this time, the activation and deactivation of the bandwidth part is performed by an upper signal, DCI information transmitted through a downlink control channel, MAC CE, This can be done through at least one of the bandwidth portion activation and deactivation timers.

In this case, all of the uplink control channel transmission resources may be set in the bandwidth part, or uplink control channel transmission resources may be set in only one or part of the bandwidth part. The above-described uplink control channel transmission resources may be configured for each terminal through terminal-specific signaling, terminal group common signaling, or RRC signaling. Setting uplink control channel transmission resources to the terminal means providing information such as the location of the control channel transmission region, subband, control channel resource allocation, and control channel length. For example, it may include at least the following information.

[Table 2]

Referring to Figure 6 (a) as an example in more detail as follows. As shown in FIG. 6(a), a terminal configured with one or more bandwidth parts may be configured with one or more uplink control channel transmission resources 640 in one of the set bandwidth parts. At this time, the terminal may be configured with one or more uplink control channel transmission resources 650, 660, 670, and 680 respectively in all bandwidth parts set as shown in FIG. 6(b). At this time, it is also possible for the terminal to receive uplink control channel transmission resources set only in a part of the bandwidth part among the set bandwidth parts. At this time, the uplink control channel transmission resource setting may be independent for each bandwidth part. At this time, the base station may set the uplink control channel transmission resource based on the maximum uplink frequency bandwidth supported by the terminal without considering the bandwidth portion when setting the uplink control channel transmission resource. For example, the base station may set the uplink control channel transmission resources 650 and 680 based on the maximum uplink frequency bandwidth 610 of the terminal. In the above case, the terminal considers the uplink control channel transmission resource and the uplink bandwidth part set by the base station, and the long PUCCH uplink control channel 650 and It is also possible to determine that the short PUCCH uplink control channel 680 is set, and no separate uplink control channels are set in bandwidth part #2 603 and bandwidth part #3 604. In addition, in FIG. 6 above, it is assumed that no uplink control channel is set in each bandwidth part or one uplink control channel is set, but when one or more uplink control channels are set in the bandwidth part. It is also possible. At this time, at least one or more of the configuration information on the uplink control channel as shown in Table 2 is defined in advance between the base station and the terminal, the terminal is configured through a higher signal from the base station, or system information (e.g., SI-RNTI signal transmitted to). The higher order signal may be transmitted by including the setting information in the higher order signal transmitted by the base station to set the uplink bandwidth portion to the terminal. If a plurality of uplink control channel transmission resources are set in the maximum uplink bandwidth that the UE can support or in one or more bandwidth parts, the base station determines the plurality of control channel transmission resources (or uplink control channel configuration indexes or uplink control channels). channel format), and transmits the selected control channel transmission resource information to the terminal through a downlink control channel. In other words, the terminal receives the DCI transmitted through the downlink control channel, receives the downlink data channel according to the DCI, and indicates the reception result of the downlink data received through the downlink data channel in the DCI. It is possible to report or transmit to the base station using the control channel transmission resource.

If the terminal needs to transmit an uplink signal through the uplink control channel, if there is no uplink control channel resource set in the currently active bandwidth part (for example, bandwidth part # 2 603), the terminal deactivates it. The uplink control channel can be transmitted by activating at least one bandwidth part (bandwidth part # 1 602) among the bandwidth parts that have been configured. At this time, if the terminal can activate only one uplink bandwidth part, The bandwidth portion (bandwidth portion #2 603) that is currently activated but has no uplink control channel resources set in the bandwidth portion is deactivated, and the bandwidth portion activated by the terminal to transmit the uplink control channel (bandwidth portion #1) It can be determined that only 602) is activated At this time, after transmitting the uplink control channel, the terminal can activate bandwidth part #2 (603) again and deactivate bandwidth part #1 (602). If, for the transmission of the uplink control channel, bandwidth part # 2 (603) or another bandwidth part (for example, bandwidth part # 3 (604)) in a symbol or slot in which bandwidth part # 1 (602) is activated When transmission of a link signal (for example, SRS) is set, transmission of an uplink signal in other bandwidth parts except for the bandwidth part #1 602 activated for transmission of an uplink control channel may not be performed. At this time, if the terminal transmits the uplink control channel in bandwidth part # 1 (602) and the time between transmission of the uplink signal set in bandwidth part # 3 (604) do not overlap (for example, symbols), or the bandwidth part After transmitting the uplink control channel in #1 (602), when the set uplink signal can be transmitted by changing to bandwidth part #3 (604), in other words, after transmitting the uplink control channel in bandwidth part #1 (602) When performing uplink signal transmission in bandwidth part # 3 (604) at a time (symbol or slot) after time X, the terminal transmits an uplink control channel in bandwidth part # 1 (602), then bandwidth part # 3 ( 604) can be activated to transmit the uplink signal set in the bandwidth part #3 (604).

If, if, if the UE needs to transmit an uplink signal through the uplink control channel, there is no uplink control channel resource set in the currently active bandwidth portion, but uplink control is performed in a plurality of bandwidth portions among the deactivated bandwidth portions. When channel resources are set, or when a plurality of bandwidth parts are activated, or when uplink control channel resources are set in all or a plurality of bandwidth parts that are always activated, the terminal uses a previously defined or set bandwidth part. The uplink control channel is transmitted through the set uplink control channel resource, or the uplink control channel resource set in the bandwidth part having the lowest index of the bandwidth part index among the active bandwidth parts in which the uplink control channel resource is set. Uplink through uplink control channel resources set in an uplink bandwidth portion associated with a downlink bandwidth portion that transmits a link control channel or receives the downlink data channel among active bandwidth portions in which uplink control channel resources are set The link control channel is transmitted, or the uplink control channel is transmitted through the uplink control channel or the uplink data channel set in the part of the uplink bandwidth in which transmission of other uplink signals other than the uplink control channel is configured, or the uplink control channel is most recently activated. If the uplink control channel is transmitted through the uplink control channel set in the uplink bandwidth portion of the uplink bandwidth, or if scheduling request information is included in the uplink control channel transmission, the terminal intends to perform the scheduling request. It can be transmitted through an uplink control channel set in an uplink bandwidth portion where resources for the SR are set.

<Example 2>

Hereinafter, a method of performing bandwidth control in the currently discussed 5G communication system will be described in detail.

7 is a diagram illustrating an operation of adjusting a transmission/reception bandwidth. Power consumption of the terminal can be efficiently managed through the bandwidth adjustment. In FIG. 7, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. Referring to the downlink bandwidth adjustment operation of FIG. 7 as an example, the terminal receives a downlink control channel and a downlink data channel corresponding to 'bandwidth A' (701) from the base station in the slot #1 (706) section. indicate The bandwidth A may be a predetermined reference bandwidth, a bandwidth determined upon initial access by a terminal, or a bandwidth or bandwidth part determined through a setting between a terminal and a base station.

When the base station instructs the terminal to change the bandwidth of the terminal to 'bandwidth B 705' through 'bandwidth control command 702' in slot #2 707, the terminal obtains the command and then performs a bandwidth change operation. run ‘Bandwidth A’ and ‘Bandwidth B’ can have different sizes and ‘Bandwidth A’ can be larger or smaller than ‘Bandwidth B’. In the example of FIG. 7 , it is assumed that the 'bandwidth B' is greater than the 'bandwidth A'. In addition, the 'bandwidth A' and 'bandwidth B' can be expressed in PRB units or bandwidth part units, respectively. The terminal needs a predetermined amount of time to successfully receive the bandwidth control command and obtain it through decoding, and requires a predetermined amount of time to change the settings of the terminal's RF module when the bandwidth is changed. The example of FIG. 7 illustrates that a maximum 'bandwidth change time X' 703 is required until the terminal receives the 'bandwidth control command' and completes the bandwidth change. In the example of FIG. 7 , the 'bandwidth control command 702' is included in the downlink control channel 717 and transmitted to the terminal. Also, reference number 703 represents a case in which downlink signal reception or uplink signal transmission of the terminal does not occur during the time interval.

The terminal completes the bandwidth change to 'bandwidth B' within the 'bandwidth change time X', and operates with 'bandwidth B' from slot #3 (708). Therefore, the base station can transmit a signal corresponding to 'bandwidth B' to the terminal from slot # 3 (708). In the example of FIG. 7, the base station transmits a downlink control channel and a downlink data channel corresponding to 'bandwidth B' in slot #3 708 and slot #4 709 to the terminal.

The 'bandwidth control command 702' can be expressed as a minimum of 1 bit to a maximum of N bits (N > 1).

- ‘Bandwidth control command’ configuration method 1 (1 bit): When there are two bandwidths that can be adjusted by the terminal, ‘bandwidth A’ and ‘bandwidth B’, the bandwidth to be applied by the terminal can be expressed as 1 bit. For example, if 1-bit information is ‘0’, it means ‘bandwidth A’, and if 1-bit information is ‘1’, it means ‘bandwidth B’.

- ‘Bandwidth control command’ configuration method 2 (N bits): 2N adjustable bandwidths of the terminal can be expressed with N bits, respectively. For example, in the case of 2 bits, ‘00’ means ‘bandwidth A’, ‘01’ means ‘bandwidth B’, ‘10’ means ‘bandwidth C’, and ‘11’ means ‘bandwidth D’.

The base station may transmit the 'bandwidth control command 702' to the terminal through at least one of physical layer signaling, MAC layer signaling, and RRC signaling. Among them, the physical layer signaling method is characterized by rapid processing by the UE. The base station may individually signal the 'bandwidth control command' to each terminal (UE-specific) or common signaling (UE-group common or common signaling) to a plurality of terminals in a cell.

At this time, when downlink and uplink signals are transmitted and received in the same frequency band as in the TDD system, or when the downlink bandwidth part and the uplink frequency bandwidth part are linked or connected to each other and operate together (for example, downlink bandwidth A When the uplink bandwidth is changed or activated from bandwidth B to B), the uplink bandwidth of FIG. 7 can be changed according to the change in the downlink bandwidth. In other words, when the terminal adjusts or changes from the downlink bandwidth A (701) to the downlink bandwidth B (705) through the bandwidth control command 702 from the base station, the uplink of the terminal is also uplink in the bandwidth A (751). Bandwidth B 755 can be adjusted or changed. If, as shown in FIG. 6 (b), if an uplink control channel transmission resource is set for each uplink bandwidth set for the terminal, that is, as shown in FIG. 7, uplink bandwidth A 751 and bandwidth B 755 In the case where the control channel transmission resources 760 and 770 are set, if the terminal receives the downlink control information (DCI) transmitted from the base station through the downlink control channel 714 in slot #1 706, the DCI Time when downlink data is received through the downlink data channel 720 indicated by , and a reception result (HARQ-ACK) for the downlink data is indicated in the DCI (for example, slot # 3 708) can report to the base station through the uplink control channel resources indicated by the DCI. At this time, if the terminal has an uplink control channel resource indicated by the DCI, the bandwidth at the time of receiving the DCI, that is, the uplink activated at the time of receiving the DCI (slot #1 706) in the case of FIG. Although it is determined that it is the uplink control channel resource 760 of the link bandwidth A 751, the base station transmits the reception result of the downlink data 720 from the terminal to the base station through the uplink control channel (slot). Since the bandwidth in #3 708) is the bandwidth B 755, when the terminal expects to transmit the reception result through the uplink control channel resource 770 of the uplink bandwidth B 755, the base station The reception result of the downlink data 720 reported by this report can be correctly received. Therefore, when the uplink bandwidth changes according to the downlink bandwidth change in a terminal and a base station configured to change the downlink and uplink bandwidths, a method of correctly determining an uplink bandwidth change time or an uplink control channel transmission resource is required.

- Method 1: Uplink control channel transmission resource determination based on an uplink bandwidth activated K hours before the start of uplink control channel transmission or the start of uplink control channel transmission

- Method 2: Changing the uplink bandwidth at the time (symbol or slot) transmitting the reception result for the downlink data received through the downlink bandwidth changed according to the reception of the bandwidth control command

Method 1 will be described in more detail as follows. When transmitting and receiving downlink and uplink signals in the same frequency band (or when the center frequencies of the downlink and uplink frequency bands are the same) as in the TDD system of FIG. 7, or when the downlink bandwidth part and the uplink frequency bandwidth part are When they are linked or connected to each other and operate together (for example, when the downlink bandwidth A is changed or activated from bandwidth B, the uplink bandwidth is also changed or activated from A to bandwidth B), the uplink bandwidth of FIG. It can be changed according to link bandwidth change. In other words, when the terminal adjusts or changes from the downlink bandwidth A (701) to the downlink bandwidth B (705) through the bandwidth control command 702 from the base station, the uplink of the terminal is also uplink in the bandwidth A (751). The bandwidth B 755 can be adjusted or changed, and the change time (symbol or slot) of the uplink bandwidth can be the same as the change time of the downlink bandwidth. In this case, the time point (symbol or slot) of the uplink bandwidth change may be X hours after the change point of the downlink bandwidth. In this case, X may be equal to or smaller than the symbol length or slot length. It can be determined by capability or defined in advance between the base station and the terminal. In addition, the X time can be set by the terminal through an upper signal from the base station or from system information (for example, a signal transmitted through SI-RNTI). The upper signal may be transmitted by including the X value in the upper signal transmitted by the base station to set the uplink bandwidth portion to the terminal.

If, as shown in FIG. 7, uplink control channel transmission resources are set for each of the uplink bandwidths set for the terminal, in other words, as shown in FIG. 7, uplink control channel transmission is performed in bandwidth A 751 and bandwidth B 755. In the case where resources 760 and 770 are set, if the terminal receives downlink control information (DCI) transmitted through the downlink control channel 714 from the base station in slot # 1 706, the DCI indicates At a time when downlink data is received through the downlink data channel 720 and a reception result (HARQ-ACK) for the downlink data is indicated in the DCI (eg slot # 3 708), the DCI It can be reported to the base station through the uplink control channel resource indicated by . At this time, through method 1, the terminal transmits the reception result for the downlink data 720 indicated by the DCI 714 (slot # 3 708) in the active bandwidth, that is, the bandwidth B ( By determining that the reception result is transmitted through the uplink control channel 770 in step 755, the base station can correctly receive the reception result of the downlink data 720 reported by the terminal. At this time, the terminal can receive the uplink control channel resource set independently of the uplink bandwidth A and the bandwidth B. For example, as shown in FIG. 9, a terminal having set uplink bandwidth 900 to bandwidth A 902 and bandwidth B 903 has uplink control channel resources for bandwidth A 902 and bandwidth B 903, respectively. can be set. For example, uplink control channel #1 and uplink control channel #2 can be set in bandwidth A (902), and uplink control channel #1 and uplink control channel #2 can be set in bandwidth B (903). there is. At this time, all setting values such as the format or length of each uplink control channel and the location of frequency resources can be independently set, and the uplink control channel resources and formats set in each of bandwidth A (902) and bandwidth B (903) Each setting value such as , length, etc. may also be independent. Therefore, as in Method 1, the bandwidth activated at the time when the terminal transmits the reception result for the downlink data 720 indicated by the DCI 714 (slot # 3 708), that is, the bandwidth B ( 755), when it is determined that the reception result is transmitted through the uplink control channel 770, the uplink control channel transmission time and resources indicated by the DCI 714 (or uplink control channel configuration index or uplink control channel format) is the reception result of the downlink data 720 indicated by the DCI 714, not the bandwidth activated at the time of receiving the DCI 714 (slot # 1 706). It can be determined that the uplink control channel transmission time and resource (or uplink control channel configuration index or uplink control channel format) of the bandwidth activated at the transmission time (slot # 3 708). In other words, the terminal determines that the uplink control channel transmission time and resource (or uplink control channel configuration index or uplink control channel format, eg PUCCH#1) indicated by the DCI 714 is determined by the DCI 714 Uplink control channel transmission time and resources (or uplink control channel configuration index or uplink control channel format), that is, PUCCH#1 930, and transmits the reception result for the downlink data 720 using the PUCCH#1 930. If the uplink control channel transmission resource (or uplink control channel configuration index or uplink control channel format) set according to the bandwidth part is set differently and is not mapped one-to-one as in the above example, for example, the bandwidth part When three uplink control channel resources are set in A and two uplink control channel resources are set in bandwidth part B, the UE transmits time and resource of uplink control channel (or uplink control channel configuration index or It is also possible to determine an uplink control channel format, for example, PUCCH#1) through modulo operation. For example, in the case where three uplink control channel resources are set in bandwidth part A and two uplink control channel resources are set in bandwidth part B, in the case of a terminal in which bandwidth part A is activated, if When the bandwidth activated at the time when the reception result for the downlink data 720 indicated by the DCI 714 is transmitted (slot # 3 708) is the bandwidth part B, the terminal transmits the uplink control channel The uplink control channel transmission time and resources (or uplink control channel configuration index or uplink control channel format) used for transmission are the uplink control channel resources (or uplink control channel configuration index or format) indicated by the DCI 714. The uplink control channel format) can be determined as a value obtained by performing modulo operation with the number of uplink control channel resources (or uplink control channel configuration indexes or uplink control channel formats) set in the changed bandwidth part B. In the above example, three uplink control channel resources (PUCCH#1, PUCCH#2, and PUCCH#3) are configured in bandwidth portion A, and two uplink control channel resources (PUCCH#3) are set in bandwidth portion B. #1 and PUCCH#2) are configured, if the DCI 714 instructs transmission of the uplink control channel through the uplink control channel resource #3 (PUCCH#3), the UE receives the indicated The result of modulo operation with the control channel resource and the number of control channel resources (or uplink control channel configuration index or uplink control channel format) set in the changed bandwidth part B (e.g., PUCCH#3 mod 2 = PUCCH#1), i.e. The uplink control channel can be transmitted using PUCCH #1 set in the bandwidth part B.

Method 2 will be described in more detail as follows. When transmitting and receiving downlink and uplink signals in the same frequency band (or when the center frequencies of the downlink and uplink frequency bands are the same) as in the TDD system of FIG. 8, or when the downlink bandwidth part and the uplink frequency bandwidth part are When the uplink bandwidth of FIG. 8 is changed or activated when the downlink bandwidth A is changed or activated from the downlink bandwidth A to the bandwidth B, the uplink bandwidth of FIG. It can be changed according to link bandwidth change. In other words, when the terminal adjusts or changes from the downlink bandwidth A (801) to the downlink bandwidth B (805) through the bandwidth control command 802 from the base station, the uplink of the terminal is also uplink in the bandwidth A (851). It can be adjusted or changed to the bandwidth B 855, and it can be assumed that the change time (symbol or slot) of the uplink bandwidth is the same as the change time of the downlink bandwidth as in Method 1. If it is assumed that the uplink bandwidth change time is the same as the downlink bandwidth change time, as in Method 1 described with reference to FIG. 7, the terminal receives the DCI 714 (slot # 1 ( 706)), the uplink of the bandwidth active at the time (slot #3 708) when the reception result for the downlink data 720 indicated by the DCI 714 is transmitted. Since it must be determined that the control channel transmission time and resource (or uplink control channel configuration index or uplink control channel format) are determined, the processing time of the terminal between the time of determining the uplink control channel transmission resource and the time of performing the uplink control channel transmission This may be difficult to obtain sufficiently. Therefore, in method 2, the uplink bandwidth is changed at the time (symbol or slot) when the reception result for the downlink data received through the changed downlink bandwidth according to the reception of the bandwidth control command is transmitted, so that the terminal can change the DCI 714 ) is received (slot # 1 706), the uplink control channel to be transmitted by the terminal can be determined based on the activated bandwidth. In other words, if an uplink control channel transmission resource is set for each of the uplink bandwidths set for the terminal as shown in FIG. 8, that is, as shown in FIG. In the case where the control channel transmission resources 860 and 870 are set, if the terminal receives the downlink control information (DCI) transmitted through the downlink control channel 814 from the base station in slot #1 806, the DCI Time at which downlink data is received through the downlink data channel 820 indicated by , and the DCI is received as a reception result (HARQ-ACK) for the downlink data (for example, slot # 1 806) The reception through the uplink control channel resource indicated by the DCI 814 among the uplink control channel resources (or uplink control channel configuration index or uplink control channel format) of the uplink bandwidth A 851 activated in Results can be reported to the base station.

Describing the above method 2 in another way, when the terminal adjusts or changes from the downlink bandwidth A 801 to the downlink bandwidth B 805 through a bandwidth control command 802 from the base station, the uplink of the terminal is also It can be adjusted or changed from the bandwidth A (851) to the uplink bandwidth B (855), and the time point (symbol or slot) of the uplink bandwidth change is K time (symbol or slot) from the time point of changing the downlink bandwidth. can judge In this case, K may be equal to or greater than the symbol length or slot length, and K may be determined by the capability of the terminal or may be defined in advance between the base station and the terminal. In addition, the K may be set by the terminal through a higher order signal from the base station or set from system information (eg, a signal transmitted through SI-RNTI). The higher order signal may be transmitted by including the K value in the higher order signal transmitted by the base station to set the uplink bandwidth portion to the terminal. In this case, it is also possible that the K value is included in a signal for transmitting a bandwidth control command and transmitted to the terminal.

Alternatively, when the terminal adjusts or changes from the downlink bandwidth A (801) to the downlink bandwidth B (805) through a bandwidth control command (802) from the base station, the uplink bandwidth of the terminal is also bandwidth A (851). ) can be adjusted or changed to the uplink bandwidth B 855, and at the time of change of the uplink bandwidth (symbol or slot), the reception result for the downlink data transmitted through the changed downlink bandwidth B 805 is uplinked. It can be determined that the uplink bandwidth is changed to the bandwidth B 855 right before the reporting or transmission time to the base station through the link control channel or at the time before X hours from the time. At this time, the uplink control channel transmitted before the change to the uplink bandwidth B 855 is the uplink control channel determined based on the uplink bandwidth A 851.

Alternatively, when the terminal adjusts or changes from the downlink bandwidth A (801) to the downlink bandwidth B (805) through a bandwidth control command (802) from the base station, the uplink bandwidth of the terminal is also bandwidth A (851). ) can be adjusted or changed to the uplink bandwidth B 855, and at the time of change of the uplink bandwidth (symbol or slot), the reception result for the downlink data transmitted through the changed downlink bandwidth B 805 is uplinked. It can be determined that the uplink bandwidth is changed to the bandwidth B 855 right before the first report or transmission to the base station through the link control channel or at the time before X hours from the time. In this case, X may be equal to or smaller than the symbol length or slot length, and the X time may be determined by the capability of the terminal or may be defined in advance between the base station and the terminal. In addition, the X time can be set by the terminal through an upper signal from the base station or from system information (eg, a signal transmitted through SI-RNTI). The upper signal may be transmitted by including the X value in the upper signal transmitted by the base station to set the uplink bandwidth portion to the terminal. At this time, the uplink control channel transmitted before the change to the uplink bandwidth B 855 is the uplink control channel determined based on the uplink bandwidth A 851.

Based on the uplink bandwidth change time determined through method 2, the terminal sets or instructed to transmit the uplink control channel at a later time including the bandwidth change time based on the changed bandwidth B 855. It is determined that the determined uplink control channel resource (or uplink control channel configuration index or uplink control channel format) 880 is the uplink control channel transmitted before the change to the uplink bandwidth B 855. It can be determined as the uplink control channel 860 determined based on the bandwidth A 851.

<Example 3>

The terminal transmits uplink control information (eg, scheduling request information (Scheduling Request, SR), downlink data channel reception result (HARQ-ACK), channel state information (Channel State Information, CSI), etc.) to the base station. Setting information for the link control channel (for example, one or more information of format, length, sequence, frequency hopping information, time/frequency resource allocation information, orthogonal sequence information, etc. . For example, as follows: FIG. This is an example of link control channel transmission. As a more specific example, the terminal may receive configuration information about the uplink control channel 1410 for transmitting scheduling request information to the base station. A plurality of uplink control channels may be configured to distinguish data to be transmitted on a link or scheduling request information for a logical channel or logical channel group. PUCCH#1 1410 is an uplink control channel configured to transmit scheduling request information for the first logical channel, and PUCCH#2 1420 is configured to transmit scheduling request information for the second logical channel. If the terminal needs to transmit uplink data on the first logical channel, the terminal transmits scheduling request information to the base station through the PUCCH#1 1410, so that the base station Uplink data channel transmission resources suitable for the logical channel (first logical channel) may be configured or allocated. In addition, the terminal may be configured with an uplink control channel 1430 for reporting a reception result of a downlink data channel received in slot n or a previous slot from the base station to the base station. In this case, configuration information for uplink control channels transmitting the uplink control information may be independently set. In other words, in the above example, the uplink control channel transmission formats for PUCCH#1 1410, PUCCH#2 1420, and PUCCH#3 1430 may be set independently. Therefore, it is possible that the transmission formats of the uplink control channels for PUCCH#1 1410, PUCCH#2 1420, and PUCCH#3 1430 are all set differently. For another example through the above example, the transmission length of the uplink control channel or the length of the transmission interval for PUCCH#1 (1410), PUCCH#2 (1420), and PUCCH#3 (1430) can be set independently. can Accordingly, it is possible to set different transmission lengths or transmission interval lengths of the uplink control channels for PUCCH#1 1410, PUCCH#2 1420, and PUCCH#3 1430.

The terminal may receive a plurality of configurations of uplink control channels for reporting the reception result of the downlink data channel received in slot n or the previous slot from the base station to the base station in slot n through higher order signals. In this case, in the downlink control information for scheduling the downlink data channel, a reception result for the downlink data channel must be reported using any uplink control channel setting among a plurality of uplink control channel setting information set in the terminal. An indicator indicating whether or not to do so may be included, and the terminal may report the reception result according to the setting of the uplink control channel 1430 indicated by the indicator.

Therefore, when the terminal reports the reception result of the downlink data channel received from the base station in slot n or the previous slot to the base station in slot n, if the terminal also wants to transmit scheduling request information in slot n, that is, , when a plurality of different uplink control information is transmitted in slot n, or when a plurality of different uplink control information is simultaneously transmitted, the terminal transmits two uplink control channels respectively to obtain the uplink control information. transmission, or one or a plurality of uplink control information may be transmitted using only one control channel among the two uplink control channels. In general, since available power available for signal transmission of a terminal is limited, it is preferable to transmit uplink control information using only one control channel among the two uplink control channels. For example, the terminal may transmit the reception result of the downlink data channel using an uplink control channel 1410 that transmits scheduling request information. At this time, since the base station knows that the terminal will transmit the reception result of the downlink data channel through the uplink control channel 1430 in slot n, if the base station is configured to transmit scheduling request information to the terminal, the uplink When receiving a reception result for the downlink data channel on the link control channel 1410, the base station transmits the reception result for the downlink data channel and scheduling request information for a logical channel corresponding to the uplink control channel 1410. It can be judged that it has been sent. If the terminal transmits scheduling request information for the logical channel corresponding to the uplink control channel 1420 in the slot n, the terminal transmits the reception result for the downlink data channel through the uplink control channel 1420. can transmit At this time, the base station receiving the reception result of the downlink data channel in the uplink control channel 1420 configured to transmit scheduling request information to the terminal, the reception result of the downlink data channel and the uplink control channel It can be determined that the scheduling request information for the logical channel corresponding to 1420 has been transmitted.

At this time, as in the above example, each uplink control channel format corresponding to each uplink control information is different, or the format of the uplink control channel is the same, but the length of the uplink control channel (or the time to configure the uplink control channel) number of axis symbols) may be different, or the format of the uplink control channel may be the same, but at least one value of a transmission sequence, an orthogonal sequence, and a cyclic shift value may be different. For convenience of description, the case in which the length of the uplink control channel corresponding to the uplink control information is different will be described in the third embodiment, but the uplink control channel format, uplink control channel sequence, and uplink control channel are as described above. The method proposed in the present invention can be applied even when one or more of the various elements constituting the uplink control channel, including the orthogonal sequence of the channel, is different.

14 is a diagram illustrating a case in which lengths of uplink control channels corresponding to uplink control information are different. For example, PUCCH#1 1410 is an uplink control channel for transmitting scheduling request information for a first logical channel in slot n, and PUCCH#2 1420 is a scheduling request for a second logical channel in slot n. An uplink control channel for transmitting information, PUCCH#3 1430 is an uplink control channel for reporting a reception result for a downlink data channel in slot n, and the PUCCH#3 1430 is the downlink data channel It is an uplink control channel set to be used by the base station to report the reception result to the terminal through downlink control signal information for scheduling. If, in slot n, the terminal simultaneously transmits the scheduling request information for the first logical channel and the reception result for the downlink data channel, the terminal transmits the reception result for the downlink data channel through PUCCH#1 1410. It is possible to transmit both the scheduling request information and the reception result for the first logical channel to the base station. However, at this time, the configuration information of PUCCH#3 1430 instructed by the base station to be used by the UE, that is, the length of PUCCH#3 1430 is different from PUCCH#1 1410.

In other words, if different uplink control information is simultaneously transmitted as described above, or if each uplink control channel transmission resource corresponding to different uplink control information overlaps in time over at least one symbol, the terminal Uplink control information may be transmitted in one of uplink control channels corresponding to the uplink control information to be transmitted. More specifically, as an example, if the terminal simultaneously transmits scheduling request information for the first logical channel and reception result for the downlink data channel in slot n, or scheduling request information for the first logical channel When an uplink control channel (PUCCH#1) for transmission and an uplink control channel (PUCCH#3) for transmission of a reception result for a downlink data channel overlap in time in at least one symbol, the UE The reception result for the data channel is transmitted through PUCCH#1 1410, and both the scheduling request information (hereinafter SR1) and the reception result (hereinafter HARQ-ACK) for the first logical channel can be transmitted to the base station.

In the above case, if the PUCCH lengths (or the number of PUCCH symbols, N_PUCCH_symb) configured for PUCCH#1 1410 and PUCCH#3 1430 are different from each other, the UE uses the configuration information of PUCCH#1 Accordingly, reception result information for the downlink data channel may be generated and transmitted through time and frequency resources set for PUCCH#1 1410. More specifically, the terminal transmits bit information transmitted on PUCCH#1 1410 (for example, when only SR is transmitted, bit information transmitted on PUCCH#1 1410 excludes d(0)=1), A signal for the HARQ-ACK information may be generated using configuration information set for PUCCH#1 1410 and transmitted through time and frequency resources set in PUCCH#1 1410. In other words, the terminal encodes the reception result of the received downlink data and the HARQ-ACK bit information using a BPSK or QPSK method, generates d(0) for information to be transmitted, and A signal to be transmitted through PUCCH#1 1410 may be generated by multiplying a sequence (eg, a Zadoff-Chu sequence) and spreading it using an orthogonal sequence value w_i(m). In other words, the terminal generates an HARQ-ACK signal to be transmitted with the same setting value as in the case of transmitting only SR1 to PUCCH#1 1410, except for information d(0), and allocates it to PUCCH#1 1410 It can be transmitted in the signal and frequency resources that have been designated. At this time, the configuration information for the PUCCH#1 1410 includes the PUCCH length (or number of PUCCH symbols, N_PUCCH_symb) configured for the PUCCH#1 1410, a Zadoff-Chu sequence, a Zadoff-Chu sequence group number, the Intra-group sequence number, frequency hopping configuration, when frequency hopping is activated, the number of symbols for the first and second hopping intervals or the spreading factor (N_PUCCH_SF0, N_PUCCH_SF1) for the first and second hopping intervals, including the orthogonal sequence value for the It includes all setting values required when creating a link control channel.

In the above case, if the PUCCH lengths (or the number of PUCCH symbols, N_PUCCH_symb) configured for PUCCH#1 1410 and PUCCH#3 1430 are the same, the UE configures PUCCH#3 1430. Information can be used to generate reception result information for the downlink data channel, and transmit it through time and frequency resources set for PUCCH#1 1410. More specifically, the terminal encodes the reception result of the received downlink data, that is, the HARQ-ACK information using a BPSK or QPSK scheme to generate d(0), and the d(0) A spread signal may be generated by multiplying a specific sequence (eg Zadoff-Chu sequence) and using the orthogonal sequence value w_i(m). In other words, the terminal generates a HARQ-ACK signal to be transmitted with the same configuration value as the case of transmitting only HARQ-ACK on PUCCH#3 1430 and transmits the HARQ-ACK signal on the signal and frequency resources allocated to PUCCH#1. At this time, the configuration information for the PUCCH#3 includes a Zadoff-Chu sequence, a Zadoff-Chu sequence group number, a sequence number within the group, a PUCCH length (or number of PUCCH symbols, N_PUCCH_symb) configured for the PUCCH#1, and a frequency When hopping configuration and frequency hopping are activated, an uplink control channel is generated by including the number of symbols for the first and second hopping intervals or the spreading factor (N_PUCCH_SF0, N_PUCCH_SF1) for the first and second hopping intervals, and an orthogonal sequence value for them. The setting information can be received through a higher level signal and downlink control information, and one of the combination of the higher level signal and downlink control information or the set value set through the higher level signal is used for downlink control. The setting information may be determined through a method such as indicated by information. In this case, in the above case, even when the PUCCH lengths (or the number of PUCCH symbols, N_PUCCH_symb) configured for PUCCH#1 1410 and PUCCH#3 1430 are the same, the UE transmits PUCCH#1 1410 It is also possible to generate reception result information for the downlink data channel using configuration information of and transmit it through time and frequency resources set for PUCCH#1 1410.

The terminal operation for the first embodiment will be described with reference to FIG. 10 as follows. In step 1010, the terminal configures the bandwidth part through a higher-order signal, a broadcast channel, or a downlink data channel including system information (eg, a downlink data channel scheduled with DCI scrambled with SI-RNTI) from the base station in step 1010. For example, uplink control channel configuration information such as Table 1 and Table 2 for one or more bandwidth parts is received. In step 1020, the terminal activates at least one downlink and uplink bandwidth part through a bandwidth part adjustment indicator or an activation indicator through DCI transmitted through an upper signal or a downlink control channel. In this case, when the downlink bandwidth part and the uplink bandwidth part operate in association with each other, the uplink bandwidth part can be changed and activated together through the downlink bandwidth part control indicator. If the terminal transmits the result of downlink data received from the base station, transmits periodic channel state information or SRS information, or transmits SR information, in the currently active uplink bandwidth portion In step 1030, it is determined whether an uplink control channel is established. If an uplink control channel is set in the uplink bandwidth portion determined in step 1030, the terminal transmits the uplink control channel set by the base station or the uplink indicated by the base station through DCI in the activated uplink bandwidth portion in step 1030. The uplink signal is transmitted using a link control channel. If the uplink control channel is not set in the uplink bandwidth part determined in step 1030, the terminal activates the bandwidth part in which the uplink control channel is set by the method proposed in the first embodiment of the present invention in step 1040. and transmit the uplink signal through an uplink control channel set in the bandwidth part.

Referring to FIG. 11, the operation of the terminal for Example 2 is as follows. In step 1110, the terminal configures the bandwidth part through an upper signal, a broadcast channel, or a downlink data channel including system information (eg, a downlink data channel scheduled with DCI scrambled with SI-RNTI) from the base station in step 1110. For example, uplink control channel configuration information such as Table 1 and Table 2 for one or more bandwidth parts is received. In step 1120, the terminal activates at least one downlink and uplink bandwidth portion through a bandwidth portion control indicator or an activation indicator through DCI transmitted through an upper signal or a downlink control channel. In this case, when the downlink bandwidth part and the uplink bandwidth part operate in association with each other, the uplink bandwidth part can be changed and activated together through the downlink bandwidth part control indicator. If the uplink bandwidth part is changed and activated together through the downlink bandwidth part control indicator, if the terminal needs to transmit the reception result of the downlink data received from the base station, or periodic channel state information or When SRS information or SR information needs to be transmitted, the terminal determines the activation time or change of the uplink bandwidth part according to Method 1 or Method 2 proposed in Embodiment 2 of the present invention, and the determined activation bandwidth The uplink control channel resource (or uplink control channel configuration index or uplink control channel format) set in the part may be determined, and the uplink signal may be transmitted through the control channel resource.

In order to perform the above embodiments of the present invention, a transmitter, a receiver, and a control unit of a terminal and a base station are shown in FIGS. 12 and 13, respectively. A method for sharing resources between a data channel and a control channel in a 5G communication system corresponding to the above embodiments, a method for specifying a data starting point, and a structure of a base station and a terminal performing various signaling for this are shown. For this purpose, the transmission unit, the reception unit, and the processing unit of the base station and the terminal must each operate according to the embodiment.

Specifically, FIG. 12 is a block diagram showing the internal structure of a terminal according to an embodiment of the present invention. As shown in FIG. 12, the terminal of the present invention may include a terminal processing unit 1201, a receiving unit 1202, and a transmitting unit 1203.

The terminal processing unit 1201 may control a series of processes in which the terminal may operate according to the above-described embodiment of the present invention. For example, according to information such as a bandwidth setting method, a bandwidth adjustment method, and a control channel transmission resource setting method for an uplink control channel according to an embodiment of the present invention, activation of the uplink bandwidth of the terminal and information on the uplink control channel and data channel It is possible to control the transmission operation differently. The terminal receiving unit 1202 and the terminal transmitting unit 1203 may be collectively referred to as a transmitting/receiving unit in an embodiment of the present invention. The transmitting and receiving unit may transmit and receive signals to and from the base station. The signal may include control information and data. To this end, the transceiver unit may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying a received signal and down-converting its frequency. In addition, the transmitting/receiving unit may receive a signal through a wireless channel, output the signal to the terminal processing unit 1201, and transmit the signal output from the terminal processing unit 1201 through the wireless channel.

13 is a block diagram showing the internal structure of a base station according to an embodiment of the present invention. As shown in FIG. 13, the base station of the present invention may include a base station processing unit 1301, a receiving unit 1302, and a transmitting unit 1303.

The base station processing unit 1301 may control a series of processes so that the base station can operate according to the above-described embodiment of the present invention. For example, different control may be performed according to a bandwidth setting method according to an embodiment of the present invention, a bandwidth adjusting method, and a control channel resource region setting method for an uplink control channel. In addition, it can be controlled to transmit various additional indicators as needed. The base station receiving unit 1302 and the base station transmitting unit 1303 may collectively be referred to as transceivers in an embodiment of the present invention. The transmission/reception unit may transmit/receive signals with the terminal. The signal may include control information and data. To this end, the transceiver unit may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying a received signal and down-converting its frequency. In addition, the transceiver may receive a signal through a radio channel, output the signal to the base station processor 1301, and transmit the signal output from the base station processor 1301 through a radio channel.

On the other hand, the embodiments of the present invention disclosed in the present specification and drawings are only presented as specific examples to easily explain the technical content of the present invention and help understanding of the present invention, and are not intended to limit the scope of the present invention. That is, it is obvious to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented. In addition, each of the above embodiments can be operated in combination with each other as needed.

Claims (8)

In the method performed by the terminal in the communication system,
Receiving configuration information for an uplink (UL) bandwidth part (BWP) through higher layer signaling, wherein the configuration information includes physical uplink control channel (PUCCH) configuration information;
Receiving downlink control information (DCI) for scheduling downlink (DL) data, wherein the DCI includes PUCCH transmission time information, a PUCCH resource indicator, and a BWP indicator indicating a change to DL BWP;
receiving the DL data based on the DCI;
identifying a PUCCH resource based on the PUCCH configuration information and the PUCCH resource indicator;
identifying a PUCCH transmission time based on the PUCCH transmission time information; and
Transmitting a hybrid automatic repeat request acknowledgment (HARQ-ACK) related to the DL data based on the PUCCH resource and the PUCCH transmission time. According to claim 1,
Configuration information for DL BWP is received through higher layer signaling,
The number of bits of the BWP indicator is determined based on the number of DL BWPs set by the configuration information for the DL BWP. In the terminal of the communication system,
transceiver; and
A processor connected to the transceiver;
The processor:
Receive configuration information for an uplink (UL) bandwidth part (BWP) through higher layer signaling, the configuration information including physical uplink control channel (PUCCH) configuration information;
receiving downlink control information (DCI) for scheduling downlink (DL) data, the DCI including PUCCH transmission time information, a PUCCH resource indicator, and a BWP indicator indicating a change to DL BWP;
Receiving the DL data based on the DCI;
identifying a PUCCH resource based on the PUCCH configuration information and the PUCCH resource indicator;
identifying a PUCCH transmission time based on the PUCCH transmission time information; and
Transmit a hybrid automatic repeat request acknowledgment (HARQ-ACK) related to the DL data based on the PUCCH resource and the PUCCH transmission time; A terminal that is set to do so. According to claim 3,
Configuration information for DL BWP is received through the higher layer signaling,
The number of bits of the BWP indicator is determined based on the number of DL BWPs set by the configuration information for the DL BWP. In a method performed by a base station in a communication system,
Transmitting configuration information for an uplink (UL) bandwidth part (BWP) through higher layer signaling, wherein the configuration information includes physical uplink control channel (PUCCH) configuration information;
Transmitting downlink control information (DCI) for scheduling downlink (DL) data, wherein the DCI includes PUCCH transmission time information, a PUCCH resource indicator, and a BWP indicator indicating a change to DL BWP;
transmitting the DL data; and
Receiving a hybrid automatic repeat request acknowledgment (HARQ-ACK) associated with the DL data; including,
The reception of the HARQ-ACK is related to PUCCH resources and PUCCH transmission time,
The PUCCH resource is related to the PUCCH configuration information and the PUCCH resource indicator,
The method of claim 1, wherein the PUCCH transmission time is related to the PUCCH transmission time information. According to claim 5,
Configuration information for DL BWP is received through the higher layer signaling,
The number of bits of the BWP indicator is determined based on the number of DL BWPs set by the configuration information for the DL BWP. In a base station of a communication system,
transceiver; and
A processor connected to the transceiver;
The processor:
Transmission of configuration information for an uplink (UL) bandwidth part (BWP) through higher layer signaling, the configuration information including physical uplink control channel (PUCCH) configuration information;
transmit downlink control information (DCI) for scheduling downlink (DL) data, the DCI including PUCCH transmission time information, a PUCCH resource indicator, and a BWP indicator indicating a change to DL BWP;
transmit the DL data; and
Receiving a hybrid automatic repeat request acknowledgment (HARQ-ACK) related to the DL data; is set to
The reception of the HARQ-ACK is related to PUCCH resources and PUCCH transmission time,
The PUCCH resource is related to the PUCCH configuration information and the PUCCH resource indicator,
wherein the PUCCH transmission time is related to the PUCCH transmission time information. According to claim 7,
Configuration information for DL BWP is transmitted through the higher layer signaling,
The number of bits of the BWP indicator is determined based on the number of DL BWPs set according to the configuration information for the DL BWP.

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