KR102642633B1 - Method and apparatus for determination of uplink resource in wirelss communication system - Google Patents

Abstract

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

Description

Method and device for setting uplink resources in a 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 specifically, to a method for setting uplink control channel transmission resources in a next-generation mobile communication system.

In order to meet the increasing demand for wireless data traffic following the commercialization of the 4G communication system, efforts are being made to develop an improved 5G communication system or pre-5G communication system. For this reason, the 5G communication system or pre-5G communication system is called a Beyond 4G Network communication system or a Post LTE system. To achieve high data rates, 5G communication systems are being considered for implementation in ultra-high frequency (mmWave) bands (such as the 60 GHz band). In order to alleviate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves, the 5G communication system uses beamforming, massive array multiple input/output (massive MIMO), and full dimension multiple input/output (FD-MIMO). ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed. In addition, to improve the network of the system, the 5G communication system uses advanced small cells, advanced small cells, cloud radio access networks (cloud RAN), and ultra-dense networks. , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, CoMP (Coordinated Multi-Points), and interference cancellation. Technology development is underway. In addition, the 5G system uses FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), which are advanced coding modulation (ACM) methods, and advanced access technologies such as FBMC (Filter Bank Multi Carrier) and NOMA. (non orthogonal multiple access), and SCMA (sparse code multiple access) are being developed.

Meanwhile, the Internet is evolving from a human-centered network where humans create and consume information to an IoT (Internet of Things) network that exchanges and processes information between distributed components such as objects. IoE (Internet of Everything) technology, which combines IoT technology with big data processing technology through connection to cloud servers, etc., is also emerging. In order to implement IoT, technological elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required. Recently, sensor networks for connection between things, and machine to machine communication (Machine to Machine) are required to implement IoT. , M2M), and MTC (Machine Type Communication) technologies are being researched. In the IoT environment, intelligent IT (Internet Technology) services that create new value in human life can be provided by collecting and analyzing data generated from connected objects. IoT is used in fields such as smart home, smart building, smart city, smart car or connected car, smart grid, healthcare, smart home appliances, and advanced medical services through the convergence and combination of existing IT (information technology) technology and various industries. It can be applied to .

Accordingly, various attempts are being 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 through 5G communication technologies such as beam forming, MIMO, and array antennas. There is. The application of cloud radio access network (cloud RAN) as the big data processing technology described above can be said to be an example of the convergence of 5G technology and IoT technology.

With recent developments in LTE (Long Term Evolution) and LTE-Advanced, uplink control channel transmission resource settings and devices are required in next-generation mobile communication systems.

Unlike existing systems, the 5G wireless communication system seeks to support not only services that require high transmission speeds, but also services that require very short transmission delays and services that require high connection density. In these scenarios, a single system must be able to provide a variety of services with different transmission/reception techniques and transmission/reception parameters in order to satisfy the diverse needs and services of users, and services to be added considering future compatibility are currently available. It is important to design it so that constraints imposed by the system do not occur. Inevitably, 5G must be able to utilize time and frequency resources more flexibly, unlike existing LTE. Among them, securing flexibility is one of the most important issues in control channel design. For this purpose, in the 5G communication system, the downlink control channel can be transmitted in a specific subband rather than across the entire system band, and the time and frequency resources for transmitting the downlink control channel can be set for each terminal. .

In order to achieve ultra-high-speed data services reaching several Gbps in the 5G system, signal transmission and reception with an ultra-wide bandwidth of tens to hundreds of MHz or several GHz is being considered. However, as power consumption increases in proportion to the transmission and reception bandwidth, it is necessary to efficiently manage the power consumption of the terminal or base station by adjusting the transmission and reception bandwidth. While base stations can be supplied with power at all times, terminals have a relatively higher need for efficient power consumption management due to limited battery capacity. Therefore, when ultra-wide bandwidth signal transmission and reception to the terminal is not required, the base station can efficiently manage the terminal's power consumption by changing the terminal's transmission and reception bandwidth to a narrow band.

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

The present invention to solve 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 device for setting resources of an uplink control channel and an uplink data channel in a 5G communication system, thereby enabling more efficient operation of the 5G system.

Figure 1 is a diagram showing the basic structure of the time-frequency domain in LTE.
Figure 2 is a diagram showing PDCCH and EPDCCH, which are downlink control channels of LTE.
Figure 3 is a diagram showing a downlink control channel
Figure 4 is a diagram showing a resource region allocation method for a 5G downlink control channel
Figure 5 is a diagram showing a resource region allocation method for a 5G uplink control channel
Figure 6 is a diagram showing 5G bandwidth portion settings and uplink control channel resource settings
Figure 7 is a diagram showing a first embodiment of the present invention.
Figure 8 is a diagram showing a second embodiment of the present invention.
Figure 9 is a diagram showing a first embodiment of the present invention.
Figure 10 is a diagram showing terminal operation according to the first embodiment of the present invention.
Figure 11 is a diagram showing terminal operation according to the 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.
Figure 14 is a diagram showing a third embodiment of the present invention.

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

For the same reason, some components are exaggerated, omitted, or schematically shown in the accompanying drawings. Additionally, the size of each component does not entirely reflect its actual size. In each drawing, identical or corresponding components are assigned the same reference numbers.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to provide common knowledge in the technical field to which the present invention pertains. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

At this time, it will be understood that each block of the processing flow diagram diagrams and combinations of the flow diagram diagrams can be performed by computer program instructions. These computer program instructions can be mounted on a processor of a general-purpose computer, special-purpose computer, or other programmable data processing equipment, so that the instructions performed through the processor of a computer or other programmable data processing equipment are described in the flow chart block(s). It creates the means to perform functions. These computer program instructions may also be stored in computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing equipment to implement a function in a particular manner, so that the computer-usable or computer-readable memory It is also possible to produce manufactured items containing instruction means that perform the functions described in the flowchart block(s). Computer program instructions can also be mounted 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 process that is executed by the computer and can be processed by the computer or other programmable data processing equipment. Instructions that perform processing equipment may also provide steps for executing the functions described in the flow diagram 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). Additionally, it should be noted that in some alternative execution examples, it is possible for the functions mentioned in the blocks to occur out of order. For example, it is possible for two blocks shown in succession to be performed substantially at the same time, or it is possible for the blocks to be performed in reverse order depending on the corresponding function.

At this time, the term '~unit' used in this embodiment refers to software or hardware components such as FPGA or ASIC, and the '~unit' performs certain roles. However, '~part' is not limited to software or hardware. The '~ part' may be configured to reside in an addressable storage medium and may be configured to reproduce on one or more processors. Therefore, as an example, '~ part' 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. The functions provided within the components and 'parts' may be combined into a smaller number of components and 'parts' or may be further separated into additional components and 'parts'. Additionally, components and 'parts' may be implemented to regenerate one or more CPUs within a device or a secure multimedia card.

Wireless communication systems have moved away from providing early voice-oriented services to, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), and LTE-Advanced. Broadband wireless that provides high-speed, high-quality packet data services such as communication standards such as (LTE-A), LTE-Pro, 3GPP2's High Rate Packet Data (HRPD), UMB (Ultra Mobile Broadband), and IEEE's 802.16e. It is evolving into a communication system.

As a representative example of the broadband wireless communication system, the LTE system adopts Orthogonal Frequency Division Multiplexing (OFDM) in the downlink (DL), and Single Carrier Frequency Division Multiplexing (SC-FDMA) in the uplink (UL). Access) method is adopted. Uplink refers to a wireless 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 wireless link in which the base station transmits data or control signals to the base station (eNode B, or base station (BS)). It refers to a wireless link that transmits data or control signals. The above multiple access method usually distinguishes each user's data or control information by allocating and operating the time-frequency resources to carry data or control information for each user so that they do not overlap, that is, orthogonality is established. do.

As a future communication system after LTE, that is, the 5G communication system must be able to freely reflect the various requirements of users and service providers, so services that simultaneously satisfy various requirements must be supported. Services considered for the 5G communication system include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). There is.

eMBB aims to provide more improved data transmission speeds than those supported by existing LTE, LTE-A or LTE-Pro. For example, in a 5G communication system, eMBB must be able to provide a peak data rate of 20Gbps in the downlink and 10Gbps in the uplink from the perspective of one base station. In addition, the 5G communication system must provide the maximum transmission rate and at the same time provide increased user perceived data rate. In order to meet these requirements, improvements in various transmission and reception technologies are required, including more advanced multi-input multiple output (MIMO) transmission technology. In addition, while the current LTE transmits signals using a maximum of 20 MHz transmission bandwidth in the 2 GHz band, the 5G communication system uses a frequency bandwidth wider than 20 MHz in the 3 to 6 GHz or above 6 GHz frequency band, meeting the requirements of the 5G communication system. Data transfer speed can be satisfied.

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

Lastly, URLLC is a cellular-based wireless communication service used for a specific purpose (mission-critical). For example, remote control of robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, and emergency situations. Services used for emergency alerts, etc. can be considered. Therefore, the communication provided by URLLC must provide very low latency and very high reliability. For example, services that support URLLC must satisfy air interface latency of less than 0.5 milliseconds and have a packet error rate of less than 10-5. Therefore, for services that support URLLC, the 5G system must provide a smaller Transmit Time Interval (TTI) than other services, and at the same time, a design that requires allocating wide resources in the frequency band to ensure the reliability of the communication link. Matters are required.

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

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

In Figure 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 0.5ms, and the length of the subframe is 1.0ms. 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. Generally, the minimum data transmission unit 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 explained in detail.

In the LTE system, scheduling information for downlink data or uplink data is transmitted from the base station to the terminal through DCI. DCI defines various formats, whether it is scheduling information for uplink data or downlink data, whether it is compact DCI with a small size of control information, and spatial multiplexing using multiple antennas is applied. It is operated by applying a determined DCI format depending on whether it is DCI 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 applies the bitmap method to allocate resources in RBG (resource block group) units. The basic unit of scheduling in the LTE system is the RB (resource block) expressed as time and frequency domain resources, and the RBG is composed of a plurality of RBs and becomes the basic unit of scheduling in the type 0 method. Type 1 allows allocation of a specific RB within the RBG.

- Resource block assignment: Notifies the RB allocated to data transmission. The resources represented are determined by system bandwidth and resource allocation method.

- Modulation and coding scheme (MCS): Notifies the modulation method 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 the transmit power control command for PUCCH, an uplink control channel.

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

A CRC (Cyclic Redundancy Check) is attached to the DCI message payload, and the CRC is scrambled with an RNTI (Radio Network Temporary Identifier) corresponding to the terminal's identity. Different RNTIs are used depending on the purpose of the DCI message, for example, UE-specific data transmission, power control command, or random access response. In other words, the RNTI is not transmitted explicitly but is transmitted included in the CRC calculation process. When receiving a DCI message transmitted on the PDCCH, the terminal checks the CRC using the assigned RNTI, and if the CRC check result is correct, it can know that the message was sent to the terminal.

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

According to Figure 2, PDCCH (201) is time-multiplexed with PDSCH (203), a data transmission channel, and transmitted over the entire system bandwidth. The area of the PDCCH (201) is expressed by the number of OFDM symbols, which is indicated to the terminal through a CFI (Control Format Indicator) transmitted through a PCFICH (Physical Control Format Indicator Channel). By allocating the PDCCH (201) to the OFDM symbol that comes 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 DL-SCH (Downlink Shared Channel), that is, the overall downlink This has the advantage of reducing link transmission delay. One PDCCH carries one DCI message, and since multiple terminals can be scheduled simultaneously on the downlink and uplink, multiple PDCCHs are transmitted simultaneously within each cell. CRS (204) is used as a reference signal for decoding of PDCCH (201). The CRS 204 is transmitted every subframe across the entire band, and scrambling and resource mapping vary depending on the 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 technique for LTE's PDCCH is limited to open-loop transmission diversity. The number of CRS ports is implicitly known to the terminal from decoding of the PBCH (Physical Broadcast Channel).

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

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

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

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

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

In EPDCCH 202, DMRS (Demodulation Reference Signal, 205) is used as a reference signal for decoding. Therefore, precoding for EPDCCH 202 can be set 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 what precoding was used. The EPDCCH (202) uses the same pattern as the DMRS of the PDSCH (203). However, unlike the PDSCH (203), the DMRS (205) in the EPDCCH (202) can support transmission using up to four antenna ports. DMRS 205 is transmitted only in the corresponding PRB where EPDCCH is transmitted.

The port setting information of the DMRS (205) varies depending on the EPDCCH (202) transmission method. In the case of the Localized transmission method, the antenna port corresponding to the 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 (Multiuser MIMO) transmission is used, a DMRS antenna port may be allocated to each terminal. Alternatively, the DMRS 205 can be shared and transmitted. In this case, it can be distinguished by the DMRS 205 scrambling sequence set as upper layer signaling. In the case of the distributed transmission method, up to two antenna ports of the DMRS (205) are supported, and the diversity technique of the precoder cycling method is supported. The DMRS 205 can be shared for all REs transmitted within one PRB pair.

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

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

Figure 3 is a diagram showing an example of the basic units of time and frequency resources that make up a downlink control channel that can be used in 5G. According to Figure 3, the basic unit of time and frequency resources constituting the control channel may be named REG, NR (New Radio)-REG, etc. Hereinafter, in the present invention, it will be named NR-REG (303). ) is composed of 1 OFDM symbol 301 on the time axis, and is composed of 12 subcarriers 302, that is, 1 RB, on the frequency axis. In configuring the basic unit of the control channel, the basic unit of the time axis is assumed to be 1 OFDM symbol 301, so that the data channel and the control channel can be time-multiplexed within one subframe. By placing the control channel before the data channel, the user's processing time can be reduced, making it easy to meet latency requirements. 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 areas of various sizes can be set by concatenating the NR-REGs 303 shown in FIG. 3. For example, if the basic unit to which a downlink control channel is allocated in 5G is called NR-CCE (304), 1 NR-CCE (304) may be composed of multiple NR-REGs (303). Taking the NR-REG 304 shown in FIG. 3 as an example, the NR-REG 303 may be composed of 12 REs, and 1 NR-CCE 304 may be divided into 4 NR-REGs 303. If configured, it means that 1 NR-CCE 304 can be composed of 48 REs. When a downlink control area is set, the area can be composed of multiple NR-CCEs (304), and a specific downlink control channel can be configured with one or multiple NR-CCEs (304) depending on the aggregation level (AL) within the control area. It can be mapped and transmitted. NR-CCEs 304 in the control area are divided by numbers, and the numbers 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 an area to which the DMRS 305, a reference signal for decoding the same, is mapped. At this time, the DMRS 305 can be transmitted efficiently by considering the overhead due to RS allocation, etc. For example, when the downlink control channel is transmitted using multiple OFDM symbols, the DMRS 305 may be transmitted only on the first OFDM symbol. The DMRS 305 can be mapped and transmitted taking into account 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, there may be a DMRS 306 transmitted for antenna port #0 and a DMRS 307 transmitted for antenna port #1. DMRS for different antenna ports can be multiplexed in various ways. Figure 3 shows an example in which DMRS corresponding to different antenna ports are transmitted orthogonally in different REs. In this way, it can be transmitted by FDM, or it can be transmitted by CDM. In addition, various types of DMRS patterns may exist, which may be related to the number of antenna ports. Hereinafter, in explaining the present invention, it will be assumed that two antenna ports are used. The same principle in the present invention can be applied to the number of antenna ports of two or more.

FIG. 4 is a diagram illustrating an example of a control area (Control Resource Set) where a downlink control channel is transmitted in a 5G wireless communication system. In FIG. 4, the 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 14 symbols.) In FIG. 4, the entire system The bandwidth 410 is divided into one bandwidth part (BWP) or multiple bandwidth parts (e.g., in FIG. 4, bandwidth part #1 (402), bandwidth part #2 (403), bandwidth part #3 (404), It may be composed of four bandwidth portions of bandwidth portion #4 (405). At this time, it is also possible to consist of a bandwidth portion including one or more bandwidth portions, such as bandwidth portion #5 (406). Figure 4 shows an example in which two control areas (control area #1 (440) and control area #2 (450)) are set. The control areas 440 and 450 can be set to specific subbands within the overall system bandwidth 410 on the frequency axis. For example, in Figure 4, control area #1 (440) is set over bandwidth part #1 (402) and bandwidth part #2 (403), and control area #2 (450) is set over bandwidth part #4 (405). It is set within. The time axis can be set to one or multiple OFDM symbols and can be defined as the control region length (Control Resource Set Duration, 460, 470). In the example of FIG. 4, control area #1 (440) is set to control area length #1 (460) of 2 symbols, and control area #2 (450) is set to control area length #2 (470) of 1 symbol. It is set.

In 5G, multiple control areas can be set up within one system from the base station perspective. Additionally, from a terminal perspective, multiple control areas may be set for one terminal. Additionally, the terminal may be set to some control areas among the control areas set within the system. Therefore, the terminal may not know the existence of a specific control area within the system. To explain with a specific example, in Figure 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. It can be, and control area #1 (440) and control area #2 (450) can be set for terminal #2. At this time, if there is no additional indicator, terminal #1 may not know whether control area #2 (450) exists.

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

[Table 1]

In addition to the above setting information, various information necessary for transmitting the downlink control channel can be set to the terminal.

Figure 5 is a diagram showing an example of the structure of an uplink control channel (PUCCH) in a 5G wireless communication system. Figure 5 explains how the UE transmits an uplink control channel by determining the transmission period of Long PUCCH (or start symbol and end symbol position, or start symbol and number of transmission symbols) based on the slot, but using a minislot (or slot It can also be applied when the terminal determines the Long PUCCH transmission period and transmits the uplink control channel based on the slot consisting of fewer symbols than the number of symbols constituting the . At this time, in the present invention, in order to minimize transmission delay, an uplink control channel with a short transmission interval (for example, an uplink control channel consisting of one or two symbols) is called Short PUCCH, and to obtain sufficient cell coverage, long transmission is called Short PUCCH. An uplink control channel with a section (for example, an uplink control channel consisting of four or more symbols) is called Long PUCCH.

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

Next, long PUCCH (503) will be explained. Since the control channel with a long transmission period is used for the purpose of increasing cell coverage, it can be transmitted using DFT-S-OFDM, a short-carrier transmission, rather than OFDM transmission. Therefore, in this case, it must be transmitted using only continuous subcarriers, and in order to obtain the frequency diversity effect, an uplink control channel with a long transmission section is configured at distant locations such as 508 and 509. The distance 505 in terms of frequency must be equal to or smaller than the uplink bandwidth supported by the terminal or the uplink bandwidth set for the terminal. In the front part of the slot, PRB-1 is transmitted, such as 508, and in the back part of the slot, 509 It is transmitted using PRB-2 as shown. In the above, PRB is a physical resource block, meaning the minimum transmission unit on the frequency side, and can be defined as 12 subcarriers, etc. Therefore, the frequency distance between PRB-1 and PRB-2 must be equal to or smaller than the maximum supported bandwidth of the terminal or the uplink transmission bandwidth set for the terminal, and the maximum supported bandwidth of the terminal must be equal to or smaller than the bandwidth 506 supported by the system. You can. The frequency resources PRB-1 and PRB-2 can be set to the terminal by an upper signal, and the frequency resource is mapped to a bit field by the upper signal, and which frequency resource to use is determined by the bit field included in the downlink control channel. It can be instructed 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 back part of the slot of 509 are each composed of uplink control information (UCI) of 510 and a terminal reference signal 511, and the two signals are separated in time and used in different signals. Assume that it is transmitted in OFDM symbols.

Next, short PUCCH (518) will be explained. 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 back (e.g., the last OFDM symbol, the penultimate OFDM symbol, or the last two OFDM symbol) is transmitted. Of course, it is also possible for Short PUCCH to be transmitted at any location within the slot. And Short PUCCH can be transmitted using one OFDM symbol or multiple OFDM symbols. In Figure 5, the case where Short PUCCH is transmitted in the last symbol 518 of the slot is illustrated. Radio resources for Short PUCCH are allocated in PRB units on the frequency side. The allocated PRBs may be allocated as a plurality of contiguous PRBs or may be allocated as a plurality of PRBs spaced apart in the frequency band. And the allocated PRB must be included in the frequency band 507 supported by the terminal or a band equal to or smaller than the uplink transmission bandwidth set by the terminal from the base station. A plurality of PRBs, which are the allocated frequency resources, can 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 used is determined by the bit field included in the downlink control channel. It can be instructed to the terminal. And within one PRB, the uplink control information 520 and the demodulation reference signal 521 must be multiplexed in the frequency band. As in 512, a method of transmitting the demodulation reference signal on one subcarrier for every two symbols, 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. The demodulation signal transmission method such as 512, 513, and 514 may be determined by the upper 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 it. Alternatively, the method of transmitting the demodulation reference signal may be determined according to the number of bits of the uplink control information 520. For example, if the number of bits of uplink control information is small, the terminal can transmit by multiplexing a demodulation reference signal such as 512 and uplink control information. When the number of bits of uplink control information is small, a sufficient transmission code rate can be obtained even without using many resources for transmission of uplink control information. For example, if the number of bits of uplink control information is large, the terminal can transmit by multiplexing the demodulation reference signal such as 514 and the uplink control information. When the number of bits of uplink control information is large, it is necessary to use a large number of resources to transmit the uplink control information in order to lower the transmission code rate.

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

Next, we will explain how the long PUCCH and short PUCCH described above are multiplexed. 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 can set the short PUCCH and long PUCCH frequency resources of different terminals so that they do not overlap as shown in the PRB of FIG. 5. However, setting the transmission resources of the uplink control channels of all terminals differently regardless of scheduling is a waste of frequency, and is not appropriate considering that limited frequency resources should be used for uplink data channel transmission rather than uplink control channel transmission. not. Therefore, the frequency resources of the short PUCCH and long PUCCH of different terminals may overlap, and the base station must perform scheduling and operate so that the transmission resources of different terminals do not collide in one slot. However, if it is unavoidable to avoid collisions between short PUCCH transmission resources and long PUCCH transmission resources of different terminals 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. Transmission resources need to be adjusted according to instructions from the base station. By the above method, the 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 to separate the downlink and uplink bandwidth into one or more bandwidth portions, a method for the terminal to configure uplink control channel resources by considering the bandwidth portion, and selection of uplink control channel resources A setting method is needed for the method and how to change the bandwidth part.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. At this time, it should be noted that in the attached drawings, identical components are indicated by identical symbols whenever possible. Additionally, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted.

In addition, in describing the embodiments of the present invention in detail, the main target will be LTE and 5G systems, but the main gist of the present invention is that the scope of the present invention is largely extended to other communication systems with similar technical background and channel types. It can be applied with slight modifications without departing from the scope, and this may be possible at the discretion of a person skilled in the technical field of the present invention.

<Example 1>

FIG. 6 is a diagram illustrating an example proposed by the present invention of a method for setting an uplink control channel structure and resource area in a 5G wireless communication system. In Figure 6, the uplink system bandwidth 610 on the frequency axis and 1 slot 620 on the time axis (in the example of Figure 6, 1 slot is assumed to be 7 OFDM symbols, but it can also be applied when it consists of 14 symbols. Figure 6 In the uplink system bandwidth 610, a plurality of uplink bandwidth portions (e.g., in FIG. 6, bandwidth portion #1 (602), bandwidth portion #2 (603), bandwidth portion #3 (604), and bandwidth portion #4 ( It may be composed of four bandwidth portions of 605). At this time, it may also be composed of a bandwidth portion including one or more bandwidth portions, such as bandwidth portion #5 606. Additionally, the terminal may use a specific time (symbol). (or slot, subframe, or frame) can be used by activating only one or more bandwidth portions. At this time, activation and deactivation of the bandwidth portion is performed using the upper signal, DCI information transmitted through the downlink control channel, MAC CE, This can be done through at least one of the bandwidth activation and deactivation timers.

At this time, the uplink control channel transmission resources may be set in all of the bandwidth portion, or the uplink control channel transmission resources may be set in only one or part of the bandwidth portion. The uplink control channel transmission resources described above can 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 area, subband, control channel resource allocation, and control channel length. For example, it may include at least the following information.

[Table 2]

A more detailed explanation is as follows, taking (a) of FIG. 6 as an example. As shown in FIG. 6(a), a terminal configured with one or more bandwidth portions can receive one or more uplink control channel transmission resources 640 in one of the configured bandwidth portions. At this time, the terminal can receive one or more uplink control channel transmission resources (650, 660, 670, 680) in all bandwidth portions set as shown in FIG. 6(b). At this time, it is possible for the terminal to receive uplink control channel transmission resources only in some of the bandwidth portions set above. At this time, uplink control channel transmission resource settings may be independent for each bandwidth portion. At this time, the base station may set the uplink control channel transmission resources based on the maximum uplink frequency bandwidth that the terminal can support without considering the bandwidth portion when setting the uplink control channel transmission resources. For example, the base station may set the uplink control channel transmission resources (650, 680) based on the maximum uplink frequency bandwidth (610) of the terminal. In the above case, the terminal considers the uplink control channel transmission resources and the uplink bandwidth portion set from the base station and includes the Long PUCCH uplink control channel 650 and the bandwidth portion #1 (602) and bandwidth portion #4 (605). It is also possible to determine that the Short PUCCH uplink control channel 680 is set, and that no separate uplink control channel is set in bandwidth part #2 (603) and bandwidth part #3 (604). In addition, in FIG. 6 above, the explanation is made assuming that no uplink control channel is set in each bandwidth part or that one uplink control channel is set, but in the case where one or more uplink control channels are set in the bandwidth part It is also possible. At this time, at least one piece of information about the uplink control channel as shown in Table 2 is predefined between the base station and the terminal, is set by the terminal through a higher signal from the base station, or is set by the terminal through system information (e.g. SI-RNTI). It can be set from a signal transmitted to . The upper signal may be transmitted by including the setting information in the upper 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 terminal can support or one or more bandwidth portions, the base station uses the plurality of control channel transmission resources (or uplink control channel configuration index or uplink control channel format) can be selected, and the selected control channel transmission resource information can be transmitted to the terminal through a downlink control channel. In other words, the terminal receives a DCI transmitted through a downlink control channel, receives a downlink data channel according to the DCI, and indicates a reception result for downlink data received through the downlink data channel in the DCI. It can be reported or transmitted to the base station using control channel transmission resources.

If the terminal needs to transmit an uplink signal through an uplink control channel, and there are no uplink control channel resources set in the currently activated bandwidth portion (for example, bandwidth portion #2 (603)), the terminal is deactivated. The uplink control channel can be transmitted by activating at least one bandwidth portion (bandwidth portion #1 (602)) among the available bandwidth portions. At this time, if the terminal can activate only one uplink bandwidth portion, The bandwidth portion (bandwidth portion #2 (603)) that is currently activated but does not have uplink control channel resources set in the bandwidth portion is deactivated, and the bandwidth portion (bandwidth portion #1) activated by the terminal to transmit the uplink control channel (602)) can be determined to be 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 uplink control channel transmission, the symbol or slot in which bandwidth part #1 (602) is activated is transmitted upward from bandwidth part #2 (603) or another bandwidth part (e.g., bandwidth part #3 (604)) When link signal (e.g., SRS) transmission is set, uplink signal transmission in all other bandwidth parts except bandwidth part #1 (602) activated for uplink control channel transmission may not be performed. At this time, if the time for the terminal to transmit the uplink control channel in bandwidth part #1 (602) and the time between uplink signal transmission (e.g. symbols) set in bandwidth part #3 (604) do not overlap, or if the time for transmitting the uplink control channel in bandwidth part #3 (604) does not overlap, If the uplink signal can be transmitted by changing to bandwidth part #3 (604) after transmitting the uplink control channel in #1 (602), that is, after transmitting the uplink control channel in bandwidth part #1 (602) When performing uplink signal transmission of bandwidth part #3 (604) at a time (symbol or slot) after 604) can be activated to transmit the uplink signal set in the bandwidth part #3 (604).

If, in a case where the terminal needs to transmit an uplink signal through an uplink control channel, there are no uplink control channel resources set in the currently activated bandwidth portion, but uplink control is performed in multiple bandwidth portions among the deactivated bandwidth portions. If channel resources are set, or multiple bandwidth portions are activated, or if uplink control channel resources are set in all or multiple bandwidth portions that are always active, the terminal is connected to a predefined or set bandwidth portion. Transmit the uplink control channel through the configured uplink control channel resource, or transmit the uplink control channel resource through the uplink control channel resource configured in the bandwidth portion with the lowest bandwidth index among the active bandwidth portions for which the uplink control channel resource is configured. Transmitting a link control channel or uplink control channel resources set in the uplink bandwidth part linked to the downlink bandwidth part that received the downlink data channel among the active bandwidth parts in which the uplink control channel resources are set. Transmitting a link control channel, transmitting an uplink control channel through an uplink data channel or an uplink control channel set in the uplink bandwidth portion where uplink signal transmission other than the uplink control channel is set, or most recently activated An uplink control channel is transmitted through an uplink control channel set in the uplink bandwidth portion, or if the uplink control channel transmission includes scheduling request information, the terminal wishes to perform a scheduling request. It can be transmitted through an uplink control channel set in the uplink bandwidth portion where resources for SR are set.

<Example 2>

Below, we will explain in detail how to perform bandwidth adjustment in the 5G communication system currently being discussed.

Figure 7 is a diagram explaining the operation of adjusting the transmission and reception bandwidth. Through the bandwidth adjustment, the power consumption of the terminal can be efficiently managed. In Figure 7, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. Taking 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. indicates. The bandwidth A may be a predetermined reference bandwidth, a bandwidth determined upon initial connection of the terminal, or a bandwidth or portion of the bandwidth determined through settings between the terminal and the base station.

In slot #2 (707), when the base station instructs the terminal to change the bandwidth of the terminal to 'bandwidth B (705)' through 'bandwidth adjustment command (702)', the terminal obtains the command and then performs a bandwidth change operation. Run. ‘Bandwidth A’ and ‘Bandwidth B’ may have different sizes, and ‘Bandwidth A’ may be larger or smaller than ‘Bandwidth B’. In the example of FIG. 7, it is assumed that the ‘bandwidth B’ is larger than the ‘bandwidth A’. And the ‘Bandwidth A’ and ‘Bandwidth B’ can each be expressed in PRB units or bandwidth part units. The terminal needs a certain amount of time to successfully receive the bandwidth adjustment command and obtain it through decoding, and when changing the bandwidth, a certain amount of time is needed to change the settings of the terminal RF module. In the example of FIG. 7, a maximum ‘bandwidth change time In the example of FIG. 7, the ‘bandwidth adjustment command 702’ is included in the downlink control channel 717 and transmitted to the terminal. In addition, reference number 703 indicates a case in which the terminal does not receive a downlink signal or transmit an uplink signal during the time interval.

The terminal completes the bandwidth change to ‘bandwidth B’ within the ‘bandwidth change time Therefore, the base station can transmit a signal corresponding to ‘bandwidth B’ to the terminal starting 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’ to the terminal in slot #3 (708) and slot #4 (709).

The ‘bandwidth adjustment command 702’ can be expressed as a minimum of 1 bit and a maximum of N bits (N > 1).

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

- ‘Bandwidth adjustment command’ configuration method 2 (N bits): 2N adjustable bandwidths of the terminal can each be expressed with N bits. 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 adjustment command 702’ to the terminal through at least one of physical layer signaling, MAC layer signaling, and RRC signaling. Among these, the physical layer signaling method has the characteristic of enabling rapid processing of the terminal. The base station may signal the ‘bandwidth adjustment command’ individually to each terminal (UE-specific), or may signal it commonly to a plurality of terminals in the cell (UE-group common or common signaling).

At this time, when downlink and uplink signals are transmitted and received in the same frequency band as in a TDD system, or when the downlink bandwidth portion and the uplink frequency bandwidth portion are linked or connected to each other and operate together (e.g., downlink bandwidth A If the uplink bandwidth is also changed or activated from A to bandwidth B), the uplink bandwidth of FIG. 7 may be changed according to the downlink bandwidth change. In other words, when the terminal adjusts or changes from downlink bandwidth A (701) to downlink bandwidth B (705) through a bandwidth adjustment command (702) from the base station, the terminal's uplink also changes from bandwidth A (751) to uplink. Bandwidth B (755) can be adjusted or changed. If uplink control channel transmission resources are set in each uplink bandwidth configured for the terminal as shown in FIG. 6 (b), in other words, as shown in FIG. 7, uplink control channel transmission resources are configured in bandwidth A (751) and bandwidth B (755). In the case where control channel transmission 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 Downlink data is received through the downlink data channel 720 indicated by, and the reception result (HARQ-ACK) for the downlink data is indicated by the DCI (e.g., slot #3 (708)) It can be reported to the base station through the uplink control channel resource indicated by the DCI. At this time, if the uplink control channel resource indicated by the DCI is activated at the time of receiving the DCI (slot #1 (706)) in the case of FIG. Although it was determined to be the uplink control channel resource 760 of the link bandwidth A (751), the base station set the time (slot) for the terminal to transmit the reception result for the downlink data 720 to the base station through the uplink control channel. Since the bandwidth in #3 (708)) is bandwidth B (755), if 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 for the downlink data 720 reported can be correctly received. Therefore, when the uplink bandwidth changes according to the downlink bandwidth change in the terminal and base station set to change the downlink and uplink bandwidth, a method is needed to correctly determine the time of uplink bandwidth change or uplink control channel transmission resources.

- Method 1: Determine uplink control channel transmission resources based on the uplink bandwidth activated K hours before the start of uplink control channel transmission or the start of uplink control channel transmission.

- Method 2: Change the uplink bandwidth at the time (symbol or slot) that transmits the reception result for the downlink data received through the changed downlink bandwidth according to the reception of the bandwidth adjustment command.

Method 1 is explained 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 Figure 7, or the downlink bandwidth portion and the uplink frequency bandwidth portion are When they are linked or connected to each other and operate together (for example, when the downlink bandwidth is changed or activated from downlink bandwidth A to bandwidth B, the uplink bandwidth is also changed or activated from A to bandwidth B), the uplink bandwidth of FIG. 7 is changed or activated. It may change depending on link bandwidth changes. In other words, when the terminal adjusts or changes from downlink bandwidth A (701) to downlink bandwidth B (705) through a bandwidth adjustment command (702) from the base station, the terminal's uplink also changes from bandwidth A (751) to uplink. Bandwidth B (755) can be adjusted or changed, and the change point (symbol or slot) of the uplink bandwidth may be the same as the change point of the downlink bandwidth. At this time, the time of change (symbol or slot) of the uplink bandwidth may be after X hours from the time of change of the downlink bandwidth, and in this case, It can be determined by Capability or defined in advance between the base station and the terminal. Additionally, the 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 uplink control channel transmission resources are set in each of the uplink bandwidths configured for the terminal as shown in FIG. 7, in other words, the uplink control channel is transmitted in bandwidth A (751) and bandwidth B (755) as shown in FIG. 7. 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 terminal receives the downlink control information (DCI) indicated by the DCI. Downlink data is received through the downlink data channel 720, and a reception result (HARQ-ACK) for the downlink data is indicated by the DCI at the time (e.g., slot #3 (708)) indicated by the DCI. It can be reported to the base station through the uplink control channel resources indicated by . At this time, through method 1, the terminal uses the bandwidth that is active at the time (slot #3 (708)) of transmitting the reception result for the downlink data 720 indicated by the DCI (714), that is, bandwidth B ( By determining that the reception result is transmitted through the uplink control channel 770 (755), the base station can correctly receive the reception result for the downlink data 720 reported by the terminal. At this time, the terminal can receive uplink control channel resources independently from uplink bandwidth A and bandwidth B. For example, as shown in FIG. 9, a terminal that has received the uplink bandwidth (900) set to bandwidth A (902) and bandwidth B (903) provides uplink control channel resources to each of the bandwidth A (902) and bandwidth B (903). can be set. For example, uplink control channel #1 and uplink control channel #2 can be set to bandwidth A (902), and uplink control channel #1 and uplink control channel #2 can be set to bandwidth B (903). there is. At this time, the settings such as the format or length of each uplink control channel, frequency resource location, etc. can be set independently, and the uplink control channel resources and format set for each of bandwidth A (902) and bandwidth B (903) can be set independently. Each setting value, such as , length, etc., can also be independent. Therefore, as in method 1, the bandwidth that is active at the time (slot #3 (708)) when the terminal transmits the reception result for the downlink data 720 indicated by the DCI (714), that is, bandwidth B ( When it is determined that the reception result is transmitted through the uplink control channel 770 of 755), 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 for 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 it is the uplink control channel transmission time and resources (or uplink control channel configuration index or uplink control channel format) of the bandwidth that is activated at the transmission time (slot #3 (708)). In other words, the terminal uses the uplink control channel transmission time and resources (or uplink control channel configuration index or uplink control channel format, for example, PUCCH#1) indicated by the DCI (714). Uplink control channel transmission time and resources (or uplink control channel configuration index or uplink) of the bandwidth that is activated at the time (slot #3 (708)) of transmitting the reception result for the indicated downlink data 720 control channel format), in other words, it is determined to be PUCCH#1 (930), and the reception result for the downlink data (720) is transmitted using the PUCCH#1 (930). If the uplink control channel transmission resources (or uplink control channel configuration index or uplink control channel format) set according to the bandwidth portion are set differently and are not mapped one-to-one as in the example above, for example, the bandwidth portion If three uplink control channel resources are set in A and two uplink control channel resources are set in bandwidth part B, the terminal uses uplink control channel transmission time and resources (or uplink control channel configuration index or It is also possible to determine the uplink control channel format (for example, PUCCH#1) through modulo operation. For example, in the case where 3 uplink control channel resources are set in bandwidth part A and 2 uplink control channel resources are set in bandwidth part B, in the case of a terminal with bandwidth part A activated, if If the bandwidth activated at the time (slot #3 (708)) of transmitting the reception result for the downlink data 720 indicated by the DCI (714) is bandwidth part B, the terminal uses 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 The uplink control channel format) can be determined as a value obtained by performing a modulor operation with the number of uplink control channel resources (or uplink control channel configuration index or uplink control channel format) set in the changed bandwidth part B. Taking the above example, three uplink control channel resources (PUCCH#1, PUCCH#2, PUCCH#3) are set in bandwidth part A, and two uplink control channel resources (PUCCH#3) are set in bandwidth part B. In the case where #1, PUCCH #2) is set, if the DCI 714 indicates transmission of an uplink control channel through uplink control channel resource #3 (PUCCH #3), the terminal The result of taking modulo operation with the number of control channel resources and 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), that is, The uplink control channel can be transmitted using PUCCH #1 set in bandwidth part B.

Method 2 is explained 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 Figure 8, or the downlink bandwidth portion and the uplink frequency bandwidth portion are When they are linked or connected to each other and operate together (for example, when the downlink bandwidth is changed or activated from downlink bandwidth A to bandwidth B, the uplink bandwidth is also changed or activated from A to bandwidth B), the uplink bandwidth of FIG. 8 is changed or activated. It may change depending on link bandwidth changes. In other words, when the terminal adjusts or changes from downlink bandwidth A (801) to downlink bandwidth B (805) through a bandwidth adjustment command (802) from the base station, the terminal's uplink also changes from bandwidth A (851) to uplink. Bandwidth B (855) can be adjusted or changed, and it can be assumed that the change point (symbol or slot) of the uplink bandwidth is the same as the change point 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 using FIG. 7, the terminal receives the DCI 714 (slot #1 ( 706)), but the uplink of the bandwidth activated at the time (slot #3 (708)) of transmitting the reception result for the downlink data 720 indicated by the DCI (714). Since it must be determined to be the control channel transmission time and resources (or uplink control channel configuration index or uplink control channel format), the terminal's processing time between the determination of uplink control channel transmission resources and the uplink control channel transmission execution time This may be difficult to secure sufficiently. Therefore, in method 2, the uplink bandwidth is changed at the time (symbol or slot) at which the reception result for the downlink data received through the changed downlink bandwidth is transmitted upon reception of the bandwidth adjustment command, so that the terminal transmits the DCI (714) ) so that the terminal can determine the uplink control channel to be transmitted based on the bandwidth that is activated at the time of receiving (slot #1 (706)). In other words, if uplink control channel transmission resources are set in each of the uplink bandwidths set for the terminal as shown in Figure 8, in other words, as shown in Figure 8, uplink control channel transmission resources are set in bandwidth A (851) and bandwidth B (855). In the case where control channel transmission resources 860 and 870 are set, if the terminal receives downlink control information (DCI) transmitted through the downlink control channel 814 from the base station in slot #1 (806), the DCI Downlink data is received through the downlink data channel 820 indicated by, and the reception result (HARQ-ACK) for the downlink data is received at the time of receiving the DCI (e.g., slot #1 (806)) The reception is made 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 The results can be reported to the base station.

To explain Method 2 in another way, when the terminal adjusts or changes from downlink bandwidth A (801) to downlink bandwidth B (805) through a bandwidth adjustment command (802) from the base station, the uplink of the terminal is also adjusted. Bandwidth A (851) can be adjusted or changed to uplink bandwidth B (855), and the uplink bandwidth change point (symbol or slot) is assumed to be K hours (symbol or slot) after the downlink bandwidth change point. You can judge. At this time, K may be a value equal to or greater than the symbol length or slot length, and K may be determined by the capability of the terminal or defined in advance between the base station and the terminal. Additionally, the K can be set by the terminal through a higher-level signal from the base station, or can be set from system information (for example, a signal transmitted through SI-RNTI). The upper signal may be transmitted by including the K value in the upper signal transmitted by the base station to set the uplink bandwidth portion to the terminal. At this time, it is also possible that the K value is included in a signal transmitting a bandwidth adjustment command and transmitted to the terminal.

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

In another method, when the terminal adjusts or changes from downlink bandwidth A (801) to downlink bandwidth B (805) through a bandwidth adjustment command (802) from the base station, the uplink bandwidth of the terminal is also adjusted to bandwidth A (851). ) can be adjusted or changed to the uplink bandwidth B (855), and the change point (symbol or slot) of the uplink bandwidth increases the reception result for downlink data transmitted through the changed downlink bandwidth B (805). It can be determined that the uplink bandwidth has changed to bandwidth B (855) immediately before or at the time of first reporting or transmission to the base station through the link control channel or at a time X hours before the above time. At this time, X may be a value equal to or smaller than the symbol length or slot length, and the Additionally, the 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 changing to uplink bandwidth B (855) is an uplink control channel determined based on uplink bandwidth A (851).

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

<Example 3>

The terminal transmits uplink control information (e.g., scheduling request information (Scheduling Request, SR), downlink data channel reception result (HARQ-ACK), channel state report (Channel State Information, CSI), etc. to the base station. Setting information for the link control channel (e.g., one or more of the uplink control channel format, length, sequence, frequency hopping information, time/frequency resource allocation information, orthogonal sequence information, etc.) is stored in the upper signal, system information (MIB) , SIB), downlink control information (or DCI), or a combination thereof, and configuration information for an uplink control channel that can be used when transmitting uplink control information can be determined. See Figure 14. For example, it is explained as follows: Figure 14 shows the uplink bandwidth portion 1402 set and determined through Examples 1 and 2 in slot n among the uplink system bandwidth 1400 set for the terminal. This is an example of link control channel transmission. To explain with a more specific example, the terminal can receive configuration information about the uplink control channel 1410 for transmitting scheduling request information to the base station. At this time, the terminal can receive configuration information about the uplink control channel 1410 for transmitting scheduling request information to the base station. In order to distinguish data to be transmitted through link or scheduling request information for a logical channel or logical channel group, a plurality of uplink control channels can be set. For example, in Figure 14. PUCCH#1 (1410) is an uplink control channel configured to transmit scheduling request information for the first logical channel, and PUCCH#2 (1420) is an uplink control channel configured to transmit scheduling request information for the second logical channel. It is a control channel. If the terminal needs to transmit uplink data for the first logical channel, the terminal transmits scheduling request information to the base station through the PUCCH #1 (1410), so that the base station transmits the information that the terminal wants to transmit. Uplink data channel transmission resources suitable for the logical channel (first logical channel) can be set or allocated. In addition, the terminal can receive an uplink control channel 1430 from the base station to report the reception result of the downlink data channel received in slot n or a previous slot to the base station. At this time, configuration information for uplink control channels transmitting the uplink control information can be set independently. In other words, in the above example, the uplink control channel transmission format for PUCCH#1 (1410), PUCCH#2 (1420), and PUCCH#3 (1430) can be set independently. Therefore, it is possible for the uplink control channel transmission formats for PUCCH#1 (1410), PUCCH#2 (1420), and PUCCH#3 (1430) to be set differently. For another example, the transmission length or transmission section length of the uplink control channel for PUCCH#1 (1410), PUCCH#2 (1420), and PUCCH#3 (1430) may be set independently. You can. Therefore, it is possible for the transmission length or transmission section length of the uplink control channel for PUCCH#1 (1410), PUCCH#2 (1420), and PUCCH#3 (1430) to be set differently.

The terminal can receive a plurality of settings related to the uplink control channel 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 a higher level signal. At this time, the downlink control information for scheduling the downlink data channel must report the reception result for the downlink data channel using any uplink control channel setting among a plurality of uplink control channel setting information set for the terminal. An indicator indicating whether to do so may be included, and the terminal can report the reception result according to the uplink control channel 1430 setting indicated by the indicator.

Therefore, in the case where the terminal reports the reception result for the downlink data channel received from the base station in slot n or a previous slot to the base station in slot n, the terminal also wants to transmit scheduling request information in slot n, in other words, , when transmitting a plurality of different uplink control information in slot n, or when transmitting a plurality of different uplink control information simultaneously, the terminal transmits the uplink control information by transmitting two uplink control channels, respectively. Alternatively, one or a plurality of uplink control information can be transmitted using only one control channel among the two uplink control channels. Since the available power that can be used for signal transmission of the terminal is generally limited, it is desirable to transmit uplink control information using only one control channel of the two uplink control channels. For example, the terminal may transmit the reception result for the downlink data channel using the uplink control channel 1410, which transmits scheduling request information. At this time, since the base station knows that the terminal will transmit the reception result for the downlink data channel in slot n through the uplink control channel 1430, if the base station transmits scheduling request information to the terminal, When receiving the reception result for the downlink data channel in the link control channel 1410, the base station sends the reception result for the downlink data channel and scheduling request information for the logical channel corresponding to the uplink control channel 1410. It can be judged that it was transmitted. If the terminal transmits scheduling request information for the logical channel corresponding to the uplink control channel 1420 in slot n, the terminal reports the reception result for the downlink data channel through the uplink control channel 1420. Can be transmitted. At this time, the base station that receives the reception result for the downlink data channel on the uplink control channel 1420 configured to use for transmitting scheduling request information to the terminal, receives the reception result for the downlink data channel and the uplink control channel. It can be determined that scheduling request information for the logical channel corresponding to (1420) has been transmitted.

At this time, as in the above example, the format of each uplink control channel corresponding to each piece of 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 of the transmission sequence, orthogonal sequence, and cyclic shift value may be different. For convenience of explanation, in this embodiment 3, a case where the length of the uplink control channel corresponding to the uplink control information is different will be described. However, as described above, the uplink control channel format, uplink control channel sequence, and uplink control 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, are different.

FIG. 14 is a diagram illustrating a case where the lengths of uplink control channels corresponding to uplink control information are different. For example, PUCCH #1 (1410) is an uplink control channel that transmits scheduling request information for the first logical channel in slot n, and PUCCH #2 (1420) is a scheduling request for the second logical channel in slot n. It is an uplink control channel that transmits information, and PUCCH#3 (1430) is an uplink control channel that reports the reception result for the downlink data channel in slot n, and the PUCCH#3 (1430) is the downlink data channel. It is an uplink control channel that is 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). Through transmission, both scheduling request information for the first logical channel and the reception result can be transmitted to the base station. However, at this time, the configuration information of PUCCH#3 (1430) that the base station instructs the terminal to use, that is, the length of PUCCH#3 (1430), is different from PUCCH#1 (1410).

In other words, if different uplink control information is transmitted simultaneously as described above, or if each uplink control channel transmission resource corresponding to different uplink control information overlaps in time by at least one symbol or more, the terminal Uplink control information can be transmitted in one of the uplink control channels corresponding to the uplink control information to be transmitted. To be more specific, for example, if the terminal simultaneously transmits scheduling request information for the first logical channel and reception results for the downlink data channel in slot n, or scheduling request information for the first logical channel If the uplink control channel (PUCCH#1) for transmission and the uplink control channel (PUCCH#3) for transmission of reception results for the downlink data channel overlap in time in at least one symbol, the terminal is connected to the downlink. By transmitting the reception result for the data channel through PUCCH#1 (1410), both scheduling request information (hereinafter referred to as SR1) and the reception result (hereinafter referred to as HARQ-ACK) for the first logical channel can be transmitted to the base station.

In the above case, if the PUCCH length (or number of PUCCH symbols, N_PUCCH_symb) configured for PUCCH #1 (1410) and PUCCH #3 (1430) are different, the terminal uses the configuration information of PUCCH #1. Thus, reception result information for the downlink data channel can be generated and transmitted through time and frequency resources set for PUCCH #1 (1410). To be more specific, the terminal excludes the bit information transmitted on PUCCH #1 (1410) (for example, if only SR is transmitted, the bit information transmitted on PUCCH #1 (1410) is d(0) = 1), Using the configuration information set for PUCCH#1 (1410), a signal for the HARQ-ACK information can be generated and transmitted through the time and frequency resources set for PUCCH#1 (1410). In other words, the terminal encodes the reception result of the received downlink data and HARQ-ACK bit information using BPSK or QPSK method, generates d(0) for the information to be transmitted, and specifies the signal. A signal to be transmitted through PUCCH#1 (1410) can be generated by multiplying the sequence (for example, Zadoff-Chu sequence) and spreading it using the orthogonal sequence value w_i(m). In other words, the terminal generates a HARQ-ACK signal to be transmitted with the same setting value as when transmitting only SR1 to PUCCH #1 (1410), excluding information d(0), and assigns it to PUCCH #1 (1410). Can be transmitted using available signal and frequency resources. At this time, the configuration information for the PUCCH #1 (1410) includes the PUCCH length (or number of PUCCH symbols, N_PUCCH_symb) set for the PUCCH #1 (1410), Zadoff-Chu sequence, Zadoff-Chu sequence group number, In-group sequence number, frequency hopping setting, and 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 and the orthogonal sequence value thereof are included. Contains all setting values required when creating a link control channel.

In the above case, if the length of PUCCH (or number of PUCCH symbols, N_PUCCH_symb) set for PUCCH #1 (1410) and PUCCH #3 (1430) are the same, the terminal sets PUCCH #3 (1430). Using the information, reception result information for the downlink data channel can be generated and transmitted through time and frequency resources set for PUCCH #1 (1410). To be more specific, the terminal encodes the reception result of the received downlink data, that is, HARQ-ACK information, using BPSK or QPSK, generates d(0), and A spread signal can be generated by multiplying a specific sequence (for example, 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 setting value as when transmitting only HARQ-ACK to PUCCH #3 (1430) and transmits it on the signal and frequency resources allocated to PUCCH #1. At this time, the configuration information for PUCCH #3 includes Zadoff-Chu sequence, Zadoff-Chu sequence group number, sequence number within the group, PUCCH length (or number of PUCCH symbols, N_PUCCH_symb), and frequency set for PUCCH #1. When hopping settings and frequency hopping are activated, an uplink control channel can be created 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 their orthogonal sequence values. It contains all the necessary setting values, and the setting information can be received through the upper signal and downlink control information, and the downlink control uses one of the setting values set through the combination of the upper signal and downlink control information or the upper signal. The setting information can be determined through methods such as information indication. At this time, in the above case, even if the length of PUCCH (or number of PUCCH symbols, N_PUCCH_symb) set for PUCCH #1 (1410) and PUCCH #3 (1430) are the same, the terminal uses PUCCH #1 (1410) It is also possible to generate reception result information for the downlink data channel using the configuration information and transmit it through time and frequency resources set for PUCCH #1 (1410).

Terminal operation for Example 1 will be described with reference to FIG. 10 as follows. In step 1010, the terminal sets the bandwidth portion through an upper signal from the base station, a broadcast channel, or a downlink data channel containing system information (e.g., a downlink data channel scheduled with DCI scrambled with SI-RNTI). Information, for example, uplink control channel-related configuration information such as Table 1 and Table 2 for one or multiple bandwidth portions is received. In step 1020, the terminal activates at least one downlink and uplink bandwidth portion through a bandwidth portion adjustment indicator or activation indicator through DCI transmitted through an upper signal or a downlink control channel. At this time, when the downlink bandwidth portion and the uplink bandwidth portion operate in conjunction with each other, the uplink bandwidth portion can be changed and activated together through the downlink bandwidth portion adjustment indicator. If the terminal transmits the reception result of downlink data received from the base station, or transmits periodic channel state information or SRS information, or transmits SR information, it is transmitted in the currently activated uplink bandwidth portion. At step 1030, it is determined whether the uplink control channel is set. If an uplink control channel is set in the uplink bandwidth portion determined in step 1030, the terminal uses the uplink control channel set by the base station in the activated uplink bandwidth portion in step 1030 or the uplink control channel indicated by the base station through DCI. The uplink signal is transmitted using a link control channel. If the uplink control channel is not set in the uplink bandwidth portion determined in step 1030, the terminal activates the bandwidth portion in which the uplink control channel is set by the method proposed in Embodiment 1 of the present invention in step 1040. And the uplink signal can be transmitted through an uplink control channel set in the bandwidth portion.

The terminal operation for Example 2 will be described with reference to FIG. 11 as follows. In step 1110, the terminal sets the bandwidth portion through an upper signal from the base station, a broadcast channel, or a downlink data channel containing system information (e.g., a downlink data channel scheduled with DCI scrambled with SI-RNTI). Information, for example, uplink control channel-related configuration information such as Table 1 and Table 2 for one or multiple bandwidth portions is received. In step 1120, the terminal activates at least one downlink and uplink bandwidth portion through a bandwidth portion adjustment indicator or activation indicator through DCI transmitted through an upper signal or a downlink control channel. At this time, when the downlink bandwidth portion and the uplink bandwidth portion operate in conjunction with each other, the uplink bandwidth portion can be changed and activated together through the downlink bandwidth portion adjustment 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 for downlink data received from the base station, or periodic channel state information or When it is necessary to transmit SRS information or SR information, the terminal determines the change or activation time of the uplink bandwidth portion according to Method 1 or Method 2 proposed in Embodiment 2 of the present invention, and changes 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, the transmitting unit, receiving unit, and control unit of the terminal and the base station are shown in Figures 12 and 13, respectively. The method for sharing resources between the data channel and the control channel in the 5G communication system corresponding to the above embodiments, the method for specifying the data start point, and the structure of the base station and terminal that perform various signaling for this are shown. For this reason, the transmitting unit, receiving unit, and processing unit of the base station and terminal must each operate according to the embodiment.

Specifically, Figure 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 can control a series of processes in which the terminal can operate according to the above-described embodiment of the present invention. For example, the uplink bandwidth activation of the terminal and the uplink control channel and data channel according to information such as the bandwidth setting method, bandwidth adjustment method, and control channel transmission resource setting method for the uplink control channel according to the embodiment of the present invention. The transmission operation can be controlled differently. The terminal receiving unit 1202 and the terminal transmitting unit 1203 may be collectively referred to as the transmitting/receiving unit in the embodiment of the present invention. The transceiver unit can transmit and receive signals to and from the base station. The signal may include control information and data. To this end, the transceiver may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. Additionally, the transceiver may receive a signal through a wireless channel and output it to the terminal processing unit 1201, and transmit the signal output from the terminal processing unit 1201 through a wireless channel.

Figure 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 can control a series of processes so that the base station can operate according to the embodiment of the present invention described above. For example, control can be performed differently depending on the bandwidth setting method, bandwidth adjustment method, and control channel resource area setting method for the uplink control channel according to the embodiment of the present invention. Additionally, 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 be collectively referred to as a transmitting/receiving unit in an embodiment of the present invention. The transmitting and receiving unit can transmit and receive signals to and from the terminal. The signal may include control information and data. To this end, the transceiver may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. Additionally, the transceiver may receive a signal through a wireless channel and output it to the base station processing unit 1301, and transmit the signal output from the base station processing unit 1301 through a wireless channel.

Meanwhile, the embodiments of the present invention disclosed in the specification and drawings are merely provided as specific examples to easily explain the technical content of the present invention and to facilitate understanding of the present invention, and are not intended to limit the scope of the present invention. In other words, it is obvious to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented. Additionally, each of the above embodiments can be operated in combination with each other as needed.

Claims (16)

In a method performed by a terminal in a communication system,
Receiving a plurality of UL (uplink) BWP (bandwidth part) configuration information through higher layer signaling;
Receiving downlink control information (DCI) for scheduling downlink (DL) data, the DCI including physical uplink control channel (PUCCH) transmission time information, a PUCCH resource indicator, and an indicator indicating a DL BWP for the DL data. do;
Receiving the DL data from the DL BWP based on the DCI;
Identifying a PUCCH transmission time based on the PUCCH transmission time information;
Identifying a PUCCH resource based on PUCCH configuration and the PUCCH resource indicator, the PUCCH resource is included in one UL BWP among a plurality of UL BWPs configured by the configuration information, and the PUCCH configuration is the one UL BWP is included in the setting for, and the one UL BWP is identified based on an indicator indicating a DL BWP for the DL data; and
Transmitting a hybrid automatic repeat request acknowledgment (HARQ-ACK) associated with the DL data at the PUCCH transmission time based on the PUCCH resource. According to claim 1,
Configuration information for a plurality of DL BWPs is received through the higher layer signaling,
The number of bits of an indicator indicating a DL BWP for the DL data is determined based on the number of the plurality of DL BWPs set by configuration information for the plurality of DL BWPs. According to claim 1,
The method wherein the one UL BWP containing the PUCCH resource is an active UL BWP. According to claim 1,
The method wherein the PUCCH transmission time is identified based on the reception time of the DCI and the PUCCH transmission time information. In the terminal of the communication system,
transceiver; and
Including a processor connected to the transceiver,
The processor:
Receiving multiple UL (uplink) BWP (bandwidth part) configuration information through upper layer signaling;
Receive downlink control information (DCI) for scheduling downlink (DL) data;
The DCI includes PUCCH transmission time information, a physical uplink control channel (PUCCH) resource indicator, and an indicator indicating DL BWP for the DL data;
Receiving the DL data from the DL BWP based on the DCI;
identify PUCCH transmission time based on the PUCCH transmission time information;
Configure PUCCH and identify PUCCH resources based on the PUCCH resource indicator;
The PUCCH resource is included in one UL BWP among a plurality of UL BWPs configured by the configuration information, the PUCCH configuration is included in the configuration for the one UL BWP, and the one UL BWP contains the DL data. Identified based on an indicator indicating the DL BWP for; and
Transmitting a hybrid automatic repeat request acknowledgment (HARQ-ACK) related to the DL data at the PUCCH transmission time based on the PUCCH resource; A terminal set to do so. According to claim 5,
Configuration information for a plurality of DL BWPs is received through the higher layer signaling,
The number of bits of the indicator indicating the DL BWP for the DL data is determined based on the number of the plurality of DL BWPs set by configuration information for the plurality of DL BWPs. According to claim 5,
The one UL BWP containing the PUCCH resource is an active UL BWP. According to claim 5,
The PUCCH transmission time is identified based on the reception time of the DCI and the PUCCH transmission time information. In a method performed by a base station in a communication system,
Transmitting a plurality of UL (uplink) BWP (bandwidth part) configuration information through higher layer signaling;
Transmitting downlink control information (DCI) for scheduling downlink (DL) data, the DCI including physical uplink control channel (PUCCH) transmission time information, a PUCCH resource indicator, and an indicator indicating a DL BWP for the DL data. do;
Transmitting the DL data in the DL BWP; and
Receiving a hybrid automatic repeat request acknowledgment (HARQ-ACK) related to the DL data from a PUCCH resource; Including,
The PUCCH resource is included in one UL BWP among a plurality of UL BWPs corresponding to the configuration information,
The PUCCH transmission time information is for setting the PUCCH transmission time for the HARQ-ACK,
The PUCCH resource indicator and the PUCCH configuration included in the configuration for the one UL BWP are for configuring the PUCCH resource,
The method wherein the one UL BWP is associated with an indicator indicating a DL BWP for the DL data. According to clause 9,
Configuration information for a plurality of DL BWPs is transmitted through the higher layer signaling,
The number of bits of the indicator indicating the DL BWP for the DL data is based on the number of the plurality of DL BWPs set by configuration information for the plurality of DL BWPs. According to clause 9,
The method wherein the one UL BWP containing the PUCCH resource is an active UL BWP. According to clause 9,
The method wherein the PUCCH transmission time is set by the transmission time of the DCI and the PUCCH transmission time information. In a base station of a communication system,
transceiver; and
Including a processor connected to the transceiver,
The processor:
Transmitting multiple UL (uplink) BWP (bandwidth part) configuration information through upper layer signaling;
Transmit downlink control information (DCI) for scheduling downlink (DL) data;
The DCI includes physical uplink control channel (PUCCH) transmission time information, a PUCCH resource indicator, and an indicator indicating DL BWP for the DL data;
Transmit the DL data in the DL BWP; and
Receiving HARQ-ACK (hybrid automatic repeat request acknowledgment) related to the DL data from a PUCCH resource; is set to,
The PUCCH resource is included in one UL BWP among a plurality of UL BWPs corresponding to the configuration information,
The PUCCH transmission time information is for setting the PUCCH transmission time for the HARQ-ACK,
The PUCCH resource indicator and the PUCCH configuration included in the configuration for the one UL BWP are for configuring the PUCCH resource,
The base station wherein the one UL BWP is associated with an indicator indicating a DL BWP for the DL data. According to claim 13,
Configuration information for a plurality of DL BWPs is transmitted through the higher layer signaling,
The number of bits of the indicator indicating the DL BWP for the DL data is based on the number of the plurality of DL BWPs set by configuration information for the plurality of DL BWPs. According to claim 13,
The base station wherein the one UL BWP containing the PUCCH resource is an active UL BWP. According to claim 13,
The PUCCH transmission time is set by the DCI transmission time and the PUCCH transmission time information.