KR20210115222A - Method and apparatus for uplink control channel transmission in wireless communication system - Google Patents

Abstract

The present disclosure relates to a communication technique which converges a 5G communication system for supporting a higher data transmission rate after a 4G system with IoT technology, and a system thereof. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of a 5G communication technology and an IoT-related technology. The present disclosure provides a method and a device for efficiently transmitting and receiving feedback information in sidelink communication. The method includes the steps of: receiving a first control signal transmitted from a base station; processing a received first control signal; and transmitting a second control signal generated based on the processing to the base station.

Description

Method and apparatus for transmitting an uplink control channel in a wireless communication system

The present disclosure proposes a method for a base station or a terminal to configure an uplink control channel in a wireless communication system.

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

On the other hand, the Internet is evolving from a human-centered connection network where humans create and consume information to an Internet of Things (IoT) network that exchanges and processes information between distributed components such as objects. Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers, etc. with IoT technology, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required. , M2M), and MTC (Machine Type Communication) are being studied. In the IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied to

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

The present disclosure proposes a method and apparatus for transmitting an uplink control channel in a wireless communication system.

The present invention for solving the above problems is a control signal processing method in a wireless communication system, the method 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.

The reception performance of the uplink control channel can be improved by repeatedly transmitting in all time resources of the uplink through the method for the base station or the terminal proposed in the present disclosure to set the repeated transmission of the uplink control channel suitable for the transmission environment.

1 is a diagram illustrating a basic structure of a time-frequency domain, which is a radio resource domain in which data or a control channel is transmitted in a 5G or NR system.
2 is a diagram illustrating a slot structure considered in a 5G or NR system.
3 is a diagram illustrating a PUCCH transmission method in a 5G or NR system.
4 is a diagram illustrating a PUCCH repeated transmission method in a 5G or NR system.
5 is a diagram illustrating an example of repeated PUCCH transmission in a TDD system.
6 is a flowchart illustrating an operation of a terminal receiving actual PUCCH repeated transmission configuration according to an embodiment of the present disclosure.
7 is a diagram illustrating an example of a PUCCH repeated transmission method according to an embodiment of the present disclosure.
8 is a flowchart for explaining the operation of another terminal receiving an actual PUCCH repeated transmission configuration according to an embodiment of the present disclosure.
9 is a diagram illustrating an example of another PUCCH repeated transmission method according to an embodiment of the present disclosure.
10 is a diagram illustrating a method in which an orthogonal sequence is mapped in repeated transmission of PUCCH format 1 according to an embodiment of the present disclosure.
11 is a diagram illustrating another method in which an orthogonal sequence is mapped in repeated transmission of PUCCH format 1 according to an embodiment of the present disclosure.
12 is a flowchart illustrating an operation of a terminal receiving intra-slot frequency hopping configuration according to an embodiment of the present disclosure.
13 is a diagram illustrating an intra-slot frequency hopping method for PUCCH according to an embodiment of the present disclosure.
14 is a flowchart illustrating an operation of another terminal receiving intra-slot frequency hopping according to an embodiment of the present disclosure.
15 is a diagram illustrating an intra-slot frequency hopping method for PUCCH according to an embodiment of the present disclosure.
16 is a flowchart illustrating an operation of another terminal receiving intra-slot frequency hopping configuration according to an embodiment of the present disclosure.
17 is a block diagram of a terminal according to an embodiment.
18 is a block diagram of a base station according to an embodiment.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

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

For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings. In addition, the size of each component does not fully reflect the actual size. The same reference numerals are assigned to the same or corresponding elements in each figure.

Advantages and features of the present disclosure, and methods for achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments described below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present disclosure belongs It is provided to completely inform those who have the scope of the technical idea, and the present disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. In addition, in the description of the present disclosure, if it is determined that a detailed description of a related function or configuration may unnecessarily obscure the subject matter of the present disclosure, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present disclosure, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Hereinafter, the base station is a subject that performs resource allocation of the terminal, and may be at least one of gNode B, eNode B, Node B, a base station (BS), a radio access unit, a base station controller, or a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, a downlink (DL) is a wireless transmission path of a signal transmitted from a base station to a terminal, and an uplink (UL) is a wireless transmission path of a signal transmitted from a terminal to a flag station. In addition, although the LTE or LTE-A system may be described below as an example, the embodiment of the present disclosure may be applied to other communication systems having a similar technical background or channel type. For example, 5G mobile communication technology (5G, new radio, NR) developed after LTE-A may be included in this, and 5G below may be a concept including existing LTE, LTE-A and other similar services. have. In addition, the present disclosure may be applied to other communication systems through some modifications within a range that does not significantly deviate from the scope of the present disclosure as judged by a person having skilled technical knowledge.

At this time, it will be understood that each block of the flowchart diagrams and combinations of the flowchart diagrams may be performed by computer program instructions. These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions performed by the processor of the computer or other programmable data processing equipment are not described in the flowchart block(s). It creates a means to perform functions. These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing equipment to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It is also possible that the instructions stored in the flow chart block(s) produce an article of manufacture containing instruction means for performing the function described in the flowchart block(s). The computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to create a computer or other programmable data processing equipment. It is also possible that instructions for performing the processing equipment provide steps for performing the functions described in the flowchart block(s).

Additionally, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). It should also be noted that in some alternative implementations it is also possible for the functions recited in blocks to occur out of order. For example, two blocks shown one after another may in fact be performed substantially simultaneously, or it is possible that the blocks are sometimes performed in the reverse order according to the corresponding function.

At this time, the term '~ unit' used in this embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and '~ unit' refers to what roles carry out However, '-part' is not limited to software or hardware. The '~ unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Thus, as an example, '~' denotes components such as software components, object-oriented software components, class components, and task components, and 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 in the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. In addition, components and '~ units' may be implemented to play one or more CPUs in a device or secure multimedia card. Also, in an embodiment, '~ unit' may include one or more processors.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the method and apparatus proposed in the embodiment of the present invention describe the embodiment of the present invention as an example for improving PUSCH coverage, but is not limited to each embodiment and applied, all or part of one or more embodiments proposed in the present invention It may also be possible to use a method for setting a frequency resource corresponding to another channel by using a combination of embodiments. Accordingly, the embodiments of the present invention may be applied through some modifications within a range that does not significantly deviate from the scope of the present invention as judged by a person having skilled technical knowledge.

In addition, when it is determined that a detailed description of a function or configuration related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

A wireless communication system, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2 HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE 802.16e, such as communication standards such as broadband wireless broadband wireless providing high-speed, high-quality packet data service It is evolving into a communication system.

In the LTE system, which is a representative example of a broadband wireless communication system, an Orthogonal Frequency Division Multiplexing (OFDM) scheme is employed in downlink (DL), and Single Carrier Frequency Division Multiple Access (SC-FDMA) in uplink (UL). method is being adopted. The uplink refers to a radio link in which a user equipment (UE) or a mobile station (MS) transmits data or control signals to a base station (eNode B (eNB) or base station (BS)), and the downlink is a base station It refers to a radio link that transmits data or control signals to this terminal. In addition, in the above-described multiple access method, the data or control information of each user is divided by allocating and operating the time-frequency resources to which the data or control information for each user is to be transmitted do not overlap with each other, that is, orthogonality is established. make it possible

The 5G communication system, which is a communication system after LTE, must support services that simultaneously satisfy various requirements so that various requirements such as users and service providers can be freely reflected. Services considered for the 5G communication system include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra reliability low latency communication (URLLC), etc. There is this.

eMBB aims to provide a higher data transfer rate than the data transfer rates supported by existing LTE, LTE-A or LTE-Pro. For example, in the 5G communication system, the eMBB must be able to provide a maximum data rate of 20 Gbps in the downlink and a maximum data rate of 10 Gbps in the uplink from the viewpoint of one base station. In addition, the 5G communication system must provide the maximum transmission rate and at the same time provide the increased user perceived data rate of the terminal. In order to satisfy such a requirement, it may be required to improve various transmission/reception technologies, including a more advanced multi-antenna (multi input multi output, MIMO) transmission technology. In addition, in the LTE system, a signal is transmitted using a transmission bandwidth of up to 20 MHz in the 2 GHz band, whereas the 5G communication system uses a frequency bandwidth wider than 20 MHz in a frequency band of 3 to 6 GHz or 6 GHz or more. can satisfy

At the same time, mMTC is being considered to support application services such as the Internet of Thing (IoT) in the 5G communication system. In order to efficiently provide the Internet of Things, mMTC requires access support for large-scale terminals within a cell, improvement of terminal coverage, improved battery life, and reduction of terminal costs. Since the Internet of Things is attached to various sensors and various devices to provide communication functions, it must be able to support a ^{large number of terminals (eg, 1,000,000 terminals/km 2 ) within a cell.} In addition, since a terminal supporting mMTC is highly likely to be located in a shaded area that a cell cannot cover, such as the basement of a building, due to the nature of the service, it requires wider coverage compared to other services provided by the 5G communication system. A terminal supporting mMTC should be composed of a low-cost terminal, and since it is difficult to frequently exchange the battery of the terminal, a very long battery life time such as 10 to 15 years is required.

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

The three services of the 5G communication system (hereinafter interchangeable with the 5G system), i.e., eMBB, URLLC, and mMTC, can be multiplexed and transmitted in one system. In this case, different transmission/reception techniques and transmission/reception parameters may be used between services to satisfy different requirements of each service.

Hereinafter, the frame structure of the 5G system will be described in more detail with reference to the drawings.

1 is a diagram illustrating a basic structure of a time-frequency domain, which is a radio resource domain of a 5G system.

(일례로 12)개의 연속된 RE들은 하나의 자원 블록(resource block, RB, 104)을 구성할 수 있다. 또한, 시간 영역에서

개의 연속된 OFDM 심볼들은 하나의 서브프레임(subframe, 110)을 구성할 수 있다. In FIG. 1 , the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. A basic unit of a resource in the time and frequency domain is a resource element (RE, 101), which is one Orthogonal Frequency Division Multiplexing (OFDM) symbol (or discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol) on the time axis. (102) and a frequency axis can be defined as one subcarrier (subcarrier, 103). in the frequency domain

(For example, 12) consecutive REs may constitute one resource block (resource block, RB, 104). Also, in the time domain

The consecutive OFDM symbols may constitute one subframe 110 .

2 is a diagram illustrating a slot structure considered in a 5G system.

)=14). 1개의 서브프레임(201)은 하나 또는 다수 개의 슬롯(202, 203)으로 구성될 수 있으며, 1개의 서브프레임(201)당 슬롯(202, 203)의 개수는 부반송파 간격에 대한 설정 값인 μ(204, 205)에 따라 다를 수 있다. 2 shows an example of a structure of a frame 200 , a subframe 201 , and a slot 202 . One frame 200 may be defined as 10 ms. One subframe 201 may be defined as 1 ms, and thus, one frame 200 may consist of a total of 10 subframes 201 . In addition, one slot (202, 203) may be defined as 14 OFDM symbols (that is, the number of symbols per slot (

)=14). One subframe 201 may consist of one or a plurality of slots 202 and 203, and the number of slots 202 and 203 per one subframe 201 is μ(204), which is a set value for the subcarrier spacing. , 205).

)가 달라질 수 있고, 이에 따라 1개의 프레임 당 슬롯 수(

)가 달라질 수 있다. 각 부반송파 간격 설정 μ에 따른

및

는 하기의 표 1로 정의될 수 있다.In the example of FIG. 2 , the slot structure in the case of μ=0 (204) and μ=1 (205) is shown as the subcarrier spacing setting value. When μ = 0 (204), one subframe 201 may consist of one slot 202, and when μ = 1 (205), one subframe 201 may consist of two slots ( 203) can be configured. That is, the number of slots per subframe (

) may vary, and accordingly, the number of slots per frame (

) may be different. According to each subcarrier spacing setting μ

and

may be defined in Table 1 below.

[Table 1]

3 is a diagram illustrating a PUCCH transmission method in a 5G or NR system.

In the 5G or NR system, the terminal transmits control information to the base station through a physical uplink control channel (PUCCH). The control information transmitted through the PUCCH may include at least one of HARQ-ACK, CSI, and SR information.

The HARQ-ACK information is that the UE transmits the demodulation/decoding result for the TB received from the base station through a physical downlink share channel (PDSCH). It reports to the base station as a value for success or failure.

CSI is information obtained by estimating a channel based on the CSI-RS received by the UE from the base station.

The SR is information for the UE to request a resource for a physical uplink share channel (PUSCH) when there is data to be transmitted to the base station.

3 illustrates a process in which the UE transmits HARQ-ACK information through PUCCH as an example. In FIG. 3 , the UE receives DCI through the PDCCH 300 and receives the PDSCH 302 and PUCCH 304 resources scheduled through the DCI. Specifically, a range of information that can be indicated by DCI is partially set as a higher-order signal, and the DCI may select one of information set as a higher-order signal. DCI may be used instead of the L1 signal in the present invention. The upper signal may collectively refer to all signals above L1.

Alternatively, the periodic PUCCH resource 306 may be always configured as an upper signal without DCI reception. The corresponding PUCCH resource may be utilized for the purpose of transmitting SR information.

A method of transmitting the PUCCH is shown in Table 2 below.

[Table 2]

4 is a diagram illustrating a PUCCH repeated transmission method in a 5G or NR system.

Although similar to FIG. 3 , there is some difference from FIG. 3 in that the UE performs repetitive transmission when transmitting PUCCH. In general, since the transmission power of the terminal is lower than that of the base station, there is a possibility that the uplink coverage is smaller than the downlink coverage. In order to solve this problem, a repetitive transmission scheme may be considered from a time point of view. When repeated transmission is performed, since more energy can be received from the standpoint of the receiver, demodulation/decoding performance may be further improved.

4 shows, as an example, a situation in which the PDSCH 402 and the PUCCH 404 are scheduled with DCI information transmitted through the PDCCH 400 . The PUCCH 404 is repeatedly transmitted 4 times, and in a 5G or NR system, the PUCCH repeated transmission is basically repeated with the same starting point and length in units of slots.

Repeated transmission of PUCCH may be shown in Table 3 below.

[Table 3]

Hereinafter, an example in which the UE sets PUCCH resource and PUCCH format related information through higher layer signaling (RRC) will be described. The PUCCH resource configuration information may include at least one of a PUCCH resource identifier (resourceId) for resource allocation, a location identifier of a starting PRB, whether or not intraSlotfrequency Hopping is supported, and information on a supported PUCCH format.

The PUCCH resource identifier is an identifier indicating the location of the actual PUCCH resource, the starting PRB position identifier is an identifier indicating the position of the PRB in one carrier, and the information on whether to support the intraSlotfrequency Hopping supports intra-slot frequency hopping. This parameter indicates whether or not In addition, the PUCCH format may be composed of short PUCCH format 0 and 2 and long PUCCH format 1, 3, and 4. Various embodiments described in the present invention may be understood as adding or extending the above identifiers, or may be added in the form of a new PUCCH format.

As an embodiment of the PUCCH format, PUCCH format1 may include information about initialCyclicShift, nrofSymbols, startingSymbolsIndex, and timeDomainOCC. In the design of the new PUCCH format, at least one parameter or value may be modified or added based on the above-mentioned information.

Table 4 below is a diagram showing configuration information related to PUCCH resource resources.

[Table 4]

Hereinafter, frequency hopping of a Physical Uplink Control Channel (PUCCH) in a 5G system will be described in detail.

5G supports an intra-slot frequency hopping method and an inter-slot frequency hopping method as a frequency hopping method of an uplink control channel.

Intra-slot frequency hopping means that when the PUCCH is scheduled in one slot, the PUCCH transmission period is divided into two hops and transmitted in different frequency bands. The intra-slot frequency hopping method is a method in which the terminal changes and transmits the frequency domain resources allocated in two hops within one slot by a set frequency offset. In intra-slot frequency hopping, the starting RB of each hop is

,

,

는 UL BWP 안에서 시작 RB를 나타내고 주파수 자원 할당 방법으로부터 계산된다.

은 상위 계층 파라미터를 통해 설정되는 두개의 홉 사이의 주파수 오프셋을 나타난다. 첫번째 홉의 심볼 수는

로 나타나고 두번째 홉의 심볼 수는

으로 나타난다.

은 한 슬롯 내에서 PUCCH 전송의 길이로 OFDM 심볼 수로 나타난다.is given as i=0 and i=1 represent the first hop and the second hop, respectively,

denotes the start RB in the UL BWP and is calculated from the frequency resource allocation method.

denotes a frequency offset between two hops set through a higher layer parameter. The number of symbols in the first hop is

, and the number of symbols in the second hop is

appears as

is the length of PUCCH transmission in one slot and is indicated by the number of OFDM symbols.

슬롯동안 시작 RB는 The inter-slot frequency hopping method is a method in which the terminal changes and transmits the frequency domain resources allocated to each slot by a set frequency offset. In inter-slot frequency hopping

During the slot, the starting RB is

는 multi-slot PUSCH 전송에서 현재 슬롯 번호,

는 UL BWP 안에서 시작 RB를 나타내고 주파수 자원 할당 방법으로부터 계산된다.

은 상위 계층 파라미터를 통해 설정되는 두개의 홉 사이의 주파수 오프셋을 나타난다. is given as

is the current slot number in multi-slot PUSCH transmission,

denotes the start RB in the UL BWP and is calculated from the frequency resource allocation method.

denotes a frequency offset between two hops set through a higher layer parameter.

The present disclosure proposes a method of repeatedly transmitting an uplink control channel in a more flexible method than the existing repetitive transmission method of repeatedly transmitting the uplink control channel so as to have the same starting point and the same symbol length in units of slots. Accordingly, it is possible to improve uplink control information reception performance and uplink coverage by flexibly allocating uplink resources in the time domain and increasing the number of symbols that are repeatedly transmitted. Hereinafter, the main gist of the present disclosure will be described with reference to specific examples.

<First embodiment>

The first embodiment of the present disclosure proposes a method of repeatedly transmitting the uplink control channel in a flexible manner compared to the existing repetitive transmission method of repeatedly transmitting the uplink control channel in a slot unit with the same starting point and the same symbol length. . Through the PUCCH repeated transmission method described in this embodiment, it is possible to flexibly allocate uplink resources in the time domain and increase the total number of repeatedly transmitted symbols to improve uplink control information reception performance and uplink coverage.

Specifically, in the conventional PUCCH repeated transmission method that is repeated with the same starting point and the same symbol length in units of slots, in the time domain of a time division duplexing (TDD) system, when the uplink resources are not set in units of slots, the uplink resources cannot use all

5 is a diagram illustrating an example of repeated PUCCH transmission in a TDD system.

As shown in FIG. 5 , in the case of the DDDSU 510, which is a configuration typically used in a TDD system, 4 symbols in slot #3 and 14 symbols in slot #4 may be configured as uplink resources in the time domain. . In this case, the configuration for transmitting the most symbols while transmitting the PUCCH without repeated transmission may be transmitting by setting 520 all 14 symbols in slot #4 as symbols for PUCCH transmission. The configuration 530 for transmitting the most symbols while repeatedly transmitting the PUCCH is set to 4 symbol lengths from the start symbol (symbol #10) in slot #3 and transmitted in symbols #10, 11, 12, and 13, and similarly in the slot # 4, the symbol length is set to 4 from the start symbol (symbol #10), and repeated transmission is performed in symbols #10, 11, 12, and 13. However, in the case of such an existing PUCCH transmission method, the number of symbols used in PUCCH transmission without repeated transmission is due to the constraint that PUCCH transmission in different slots has the same start symbol and the same symbol length during repeated transmission. It may be more than the number of symbols used for PUCCH transmission. Therefore, if all four uplink symbols of slot #3 and 14 uplink symbols of slot #4 can be used by modifying the repeated transmission constraint to have the same start symbol and the same symbol length, PUCCH is transmitted in all uplink symbols. Therefore, it is possible to maximize uplink control information reception performance and uplink coverage.

Therefore, the present disclosure proposes the following methods as a method for repeatedly transmitting an uplink control channel in a more flexible method than a conventional repetitive transmission method of repeatedly transmitting an uplink control channel to have the same starting point and the same symbol length in units of slots. .

[Method 1-1]

When the start symbol and the symbol length are set and the number of repeated transmissions is set, the PUCCH can be transmitted in a symbol that can be actually transmitted in the set PUCCH repeated transmission. The start symbol, length, and number of repeated transmissions of PUCCH transmission may be configured through higher layer signaling (eg, RRC signaling) or L1 signaling (eg, Downlink Control Information: DCI). Thereafter, PUCCH transmission to be actually transmitted may be determined by TDD configuration (or slot indication), invalid symbolpattern, slot boundary, etc. in the configured PUCCH repeated transmission.

6 is a flowchart for explaining an operation of a terminal receiving an actual PUCCH repeated transmission configuration according to an embodiment of the present disclosure.

First, time domain resource configuration information related to PUCCH transmission, such as the PUCCH transmission start symbol and length, and the number of repeated transmissions, is transmitted through higher layer signaling (eg, RRC signaling) or L1 signaling (eg, Downlink Control Information: DCI). may be set (601). In the resource configuration information related to the configured PUCCH transmission, the downlink symbol set by the TDD configuration (in RRC signaling) or slot format indication (in DCI) may be determined as an invalid symbol, and the flexible or uplink symbol may be determined as a valid symbol (602) ). In addition, an upper layer parameter (eg, InvalidSymbolPattern ) may set an invalid symbol by providing a symbol level bitmap spanning one or two slots, and may determine an invalid symbol based on this ( 603 ). For example, a symbol corresponding to 1 in the bitmap may indicate an invalid symbol. Additionally, the period and pattern of the bitmap may be set through a higher layer parameter (eg, periodicityAndPattern ). If a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter indicates 1, the UE applies an invalid symbol pattern and indicates 0, the terminal may not apply the invalid symbol pattern. In addition, if a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter is not set, the terminal may apply an invalid symbol pattern. Invalid symbol may be set by a combination of invalidsymbolpattern and TDD configuration/slot format indication of the above description. That is, the invalid symbol may be determined only by the TDD configuration/slot format indication, and may be determined by considering the invalid symbol pattern as well. When an invalid symbol is determined, a valid symbol that can be actually used for PUCCH transmission in the PUCCH repeated transmission configured above is determined (604). After that, in order to prevent one PUCCH from being transmitted over several slots, if a slot boundary exists within a continuous valid symbol that can be actually used for PUCCH transmission, the PUCCH to be actually transmitted can be distinguished based on the slot boundary. have. Thereafter, the PUCCH may be transmitted based on the symbol actually used for transmission and the divided slot boundary (608). At this time, when the configured PUCCH formats are 1, 3, and 4 (606), when the number of actually transmitted PUCCH OFDM symbols is less than 4, PUCCH transmission may not be performed (607). In the above description, reference numeral 603 may be omitted depending on whether an invalid symbol pattern is set. If the above description of (601) to (605) is expressed differently, it can be expressed as follows.

에 의해 주어지고 그 슬롯에서 시작하는 심볼은

에 의해 주어진다. n번째 nominal repetition이 끝나는 슬롯은

에 의해 주어지고 그 슬롯에서 끝나는 심볼은

에 의해 주어진다. 여기서 n=0,…, numberofrepetitions-1 이고 S는 설정 받은 상향링크 데이터 채널의 시작 심볼, 그리고 L은 설정 받은 상향링크 데이터 채널의 심볼 길이를 나타낸다.

는 PUSCH 전송이 시작하는 슬롯을 나타내고

슬롯당 심볼의 수를 나타낸다. - (601): First, the nominal repetition of the uplink control channel is determined based on the start symbol and length of the uplink control channel set through higher layer signaling or L1 signaling as follows. The slot where the nth nominal repetition begins is

The symbol given by and starting in that slot is

is given by The slot where the nth nominal repetition ends is

The symbol given by and ending in that slot is

is given by where n=0,… , numberofrepetitions -1, S is the start symbol of the configured uplink data channel, and L is the symbol length of the configured uplink data channel.

denotes a slot in which PUSCH transmission starts

Indicates the number of symbols per slot.

- (602): The UE determines an invalid symbol for PUSCH repeated transmission type B. By tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated The downlink-configured symbol is determined as an invalid symbol for PUSCH repeated transmission type B.

- (603): Additionally, an invalid symbol may be set through a higher layer parameter (eg InvalidSymbolPattern ). Higher layer parameters (eg InvalidSymbolPattern ) can set invalid symbols by providing a symbol level bitmap spanning one or two slots. In the bitmap, a value of 1 indicates an invalid symbol. Additionally, the period and pattern of the bitmap may be set through a higher layer parameter (eg, periodicityAndPattern ). If a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter indicates 1, the terminal applies an invalid symbol pattern and indicates 0, the terminal may not apply the invalid symbol pattern. If a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter is not set, the terminal may apply an invalid symbol pattern.

- (604): After the Invalid symbol is determined in each Nominal repetition, the terminal may consider the remaining symbols as valid symbols.

- (605): If more than one valid symbol is included in each nominal repetition, the nominal repetition may contain one or more actual repetitions. Here, each actual repetition includes a continuous set of valid symbols that can be used for repeated PUCCH transmission in one slot.

7 is a diagram illustrating an example of a PUCCH repeated transmission method according to an embodiment of the present disclosure. When the terminal receives the start symbol S of the uplink control channel set to 0, the length L is set to 14, and the number of repeated transmissions is set to 16, nominal repetition is indicated in 16 consecutive slots (701). Thereafter, the terminal determines the symbol set as the downlink symbol in each nominal repetition to be the invalid symbol in order to determine the invalid symbol, and determines the symbols set to 1 in the invalid symbol pattern 702 as the invalid symbols. In each nominal repetition, it is determined that valid symbols are not invalid symbols (703). When the determined valid symbols are composed of four or more consecutive symbols in one slot, the actual PUCCH repetition is set and transmitted (704).

According to the method, uplink control information reception performance and uplink coverage can be improved by flexibly allocating uplink resources in the time domain through higher layer signaling or L1 signaling to increase the total number of symbols that are repeatedly transmitted.

[Method 1-2]

When the start symbol and the symbol length are set and the number of repeated transmissions is set, one PUCCH can be transmitted in consecutive symbols that can be actually transmitted in the slot. The start symbol, length, and number of repeated transmissions of PUCCH transmission may be configured through higher layer signaling (eg, RRC signaling) or L1 signaling (eg, Downlink Control Information: DCI). Thereafter, PUCCH transmission to be actually transmitted may be determined by TDD configuration (or slot indication), invalidsymbolpattern, slot boundary, and the like within the slot.

8 is a flowchart for explaining the operation of another terminal receiving an actual PUCCH repeated transmission configuration according to an embodiment of the present disclosure.

First, time domain resource configuration information related to PUCCH transmission, such as the PUCCH transmission start symbol and length, and the number of repeated transmissions, is transmitted through higher layer signaling (eg, RRC signaling) or L1 signaling (eg, Downlink Control Information: DCI). may be set (801). In the resource configuration information related to the configured PUCCH transmission, the downlink symbol set by the TDD configuration (in RRC signaling) or slot format indication (in DCI) is determined as an invalid symbol, and the flexible or uplink symbol can be determined as a valid symbol ( 802). In addition, an upper layer parameter (eg, InvalidSymbolPattern ) may set an invalid symbol by providing a symbol level bitmap spanning one slot or two slots, and may determine an invalid symbol based on this ( 803 ). For example, a symbol corresponding to 1 in the bitmap may indicate an invalid symbol. Additionally, the period and pattern of the bitmap may be set through a higher layer parameter (eg, periodicityAndPattern ). If a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter indicates 1, the UE applies an invalid symbol pattern and indicates 0, the terminal may not apply the invalid symbol pattern. In addition, if a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter is not set, the terminal may apply an invalid symbol pattern. Invalid symbol may be set by a combination of invalidsymbolpattern and TDD configuration/slot format indication of the above description. That is, the invalid symbol may be determined only by the TDD configuration/slot format indication or may be determined by considering the invalid symbol pattern together. When the invalid symbol is determined, a valid symbol that can be actually used for PUCCH transmission within a slot included in the repeated PUCCH transmission is determined (804). Thereafter, the PUCCH to be actually transmitted may be distinguished as a set of consecutive valid symbols in the slot included in the repeated PUCCH transmission ( 805 ). Thereafter, the PUCCH may be transmitted based on the symbol and the divided set actually used for transmission (808). In this case, when the configured PUCCH formats are 1, 3, and 4 (806), when the number of actually transmitted PUCCH OFDM symbols is less than 4, PUCCH transmission may not be performed (807). In the above description, reference numeral 803 may be omitted depending on whether an invalid symbol pattern is set. If the above description of (801) to (805) is expressed differently, it can be expressed as follows.

에 의해 주어지고 그 슬롯에서 시작하는 심볼은

에 의해 주어진다. n번째 nominal repetition이 끝나는 슬롯은

에 의해 주어지고 그 슬롯에서 끝나는 심볼은

에 의해 주어진다. 여기서 n=0,…, numberofrepetitions-1 이고 S는 설정 받은 상향링크 데이터 채널의 시작 심볼, 그리고 L은 설정 받은 상향링크 데이터 채널의 심볼 길이를 나타낸다.

는 PUSCH 전송이 시작하는 슬롯을 나타내고

슬롯당 심볼의 수를 나타낸다. - (801): First, the nominal repetition of the uplink control channel is determined based on the start symbol and length of the uplink control channel configured through higher layer signaling or L1 signaling as follows. The slot where the nth nominal repetition begins is

The symbol given by and starting in that slot is

is given by The slot where the nth nominal repetition ends is

The symbol given by and ending in that slot is

is given by where n=0,… , numberofrepetitions -1, S is the start symbol of the configured uplink data channel, and L is the symbol length of the configured uplink data channel.

denotes a slot in which PUSCH transmission starts

Indicates the number of symbols per slot.

- (802): The UE determines an invalid symbol for PUSCH repeated transmission type B. By tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated The downlink-configured symbol is determined as an invalid symbol for PUSCH repeated transmission type B.

- (803): Additionally, an invalid symbol may be set through a higher layer parameter (eg InvalidSymbolPattern ). Higher layer parameters (eg InvalidSymbolPattern ) can set invalid symbols by providing a symbol level bitmap spanning one or two slots. In the bitmap, a value of 1 indicates an invalid symbol. Additionally, the period and pattern of the bitmap may be set through a higher layer parameter (eg, periodicityAndPattern ). If a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter indicates 1, the terminal applies an invalid symbol pattern and indicates 0, the terminal may not apply the invalid symbol pattern. If a higher layer parameter (eg, InvalidSymbolPattern ) is set and the InvalidSymbolPatternIndicator-ForDCIFormat0_1 or InvalidSymbolPatternIndicator-ForDCIFormat0_2 parameter is not set, the terminal may apply an invalid symbol pattern.

- (804): After the invalid symbol is determined in the slot including the nominal repetition, the terminal may consider the remaining symbols as valid symbols.

- (805): When one or more valid symbols are included in the slot including the nominal repetition, one or more actual repetitions may be included in the slot. Here, each actual repetition includes a continuous set of valid symbols that can be used for repeated PUCCH transmission in one slot.

9 is a diagram illustrating an example of another PUCCH repeated transmission method according to an embodiment of the present disclosure. When the terminal receives the start symbol S of the uplink control channel set to 10, the length L is set to 4, and the number of repeated transmissions is set to 8, nominal repetition is indicated in three consecutive slots (920). Thereafter, the terminal determines the symbol set as the downlink symbol in each nominal repetition as the invalid symbol in order to determine the invalid symbol, and determines the symbols set as 1 in the invalid symbol pattern as the invalid symbol (930). A set of consecutive valid symbols in each slot included in the nominal repetition is determined (931, 932, 933, 934). When the determined sets of valid symbols are composed of four or more consecutive symbols, the actual PUCCH repetition is set and transmitted (940).

In the time domain, PUCCH resource configuration is limited because it is configured with higher layer signaling. Therefore, the method enables transmission of one PUCCH to which resources of 14 symbols are allocated if all 14 symbols are valid even if there are several nominal repetitions in one slot. It has the advantage of maximally increasing the length. Accordingly, it is possible to maximize uplink control information reception performance and uplink coverage even in the PUCCH resource configuration of a limited time domain.

<Second embodiment>

Although the uplink control channel is repeatedly transmitted, the number of actually transmitted symbols may be different between each repeated transmission. In this case, the value mapped to the symbol is different according to the symbol length. In particular, in the case of PUCCH format 1, multiplexing between UEs may be supported according to a value mapped to a symbol. However, if a value mapped to a symbol is changed according to a symbol length, multiplexing between UEs may not be supported. Specifically, in the case of PUCCH format 1, multiplexing may be performed between UEs according to an orthogonal sequence index.

Table 5 below is a table showing the relationship between the orthogonal sequence index corresponding to PUCCH format 1 and the index included in the orthogonal sequence.

[Table 5]

For example, in the case of PUCCH format 1 in which 14 symbols in which intra-slot frequency hopping is not configured are configured, a total of 7 indices ranging from 0 to 6 orthogonal sequence indexes may be configured. Accordingly, a maximum of 7 UEs may be multiplexed according to the index. However, when four symbols are set in another repeated transmission, only two indices from 0 to 1 may be set in the orthogonal sequence index, which may cause a problem. In order to solve this problem, the following methods are proposed.

[Method 2-1]

First, the base station sets one orthogonal sequence index through higher layer signaling based on the PUCCH transmission having the longest symbol during repeated PUCCH transmission to the UE. Since the orthogonal sequence index is set based on the PUCCH transmitted to the longest symbol, there may be no orthogonal sequence index based on the PUCCH transmitted to the short symbol. In this case, the orthogonal sequence of the PUCCH transmitted to the short symbol is not newly created The orthogonal sequence generated for the PUCCH transmitted in the longest symbol may be used as it is. An orthogonal sequence generated for a PUCCH transmitted to the longest symbol may be mapped to a PUCCH transmitted to a short symbol in order.

10 is a diagram illustrating a method in which an orthogonal sequence is mapped in repeated transmission of PUCCH format 1 according to an embodiment of the present disclosure.

For example, if the orthogonal sequence index is set to 2 for the PUCCH 1002 transmitted in 14 symbols in which intra-slot frequency hopping is not configured, the index 1003 of the orthogonal sequence is [0 2 4 6 1 3 5] is set first. Thereafter, the exponents of the orthogonal sequence in the PUCCH 1001 transmitted to the four symbols are not set separately, but may be set 1004 in the order of the preset exponents.

According to the method, it is not necessary to set an orthogonal sequence index for each repeated transmission having a different symbol length, and UE multiplexing can be performed based on the PUCCH transmitting the longest symbol.

[Method 2-2]

Method 2-1 has an advantage in that it can be mapped regardless of the symbol length. However, when intra-slot frequency hopping is set, a case in which an orthogonal sequence is mapped to only one symbol may occur. In this case, when mapping is sequentially based on the PUCCH transmitting the longest symbol, the index of the orthogonal sequence may be set only to 0 regardless of the orthogonal sequence index. In this case, when UE multiplexing is performed, it is difficult to distinguish each UE because all UEs have mapped index values of the same orthogonal sequence. In order to solve this, when mapping to PUCCH transmitted to a short symbol, it is possible to map from indexes other than the beginning, rather than mapping the start in order from the first. Here, indexes other than the first may be previously agreed between the base station and the terminal, or may be set by higher layer signaling or L1 signaling. Specifically, referring to Table 5, the index value of the first orthogonal sequence is always 0 regardless of the number of symbols and the orthogonal sequence index. On the other hand, since the index values of the orthogonal sequence except for the first change according to the orthogonal sequence index, UE multipelxing can be distinguished even in the PUCCH transmitted in a short symbol.

11 is a diagram illustrating another method in which an orthogonal sequence is mapped in repeated transmission of PUCCH format 1 according to an embodiment of the present disclosure.

For example, if the orthogonal sequence index is set to 0 for the first UE 1100 for the PUCCH 1102 transmitted in 14 symbols in which intra-slot frequency hopping is configured, the index 1103 of the orthogonal sequence of the first hop is [ 0 0 0] The exponent 1104 of the orthogonal sequence of the second hop is first set to [0 0 0 0]. After that, the index of the orthogonal sequence in the PUCCH 1101 transmitted in 4 symbols is not set separately, but in the set index, in order from the second, the first hop is [0] (1105), the second hop is [0] (1106). When the orthogonal sequence index is set to 1 for the PUCCH 1112 transmitted to 14 symbols in which intra-slot frequency hopping is configured to the second UE 1110, the index 1113 of the orthogonal sequence of the first hop is [0 1 2 ] is first set to the exponent 1114 of the orthogonal sequence of the second hop [0 2 0 2]. After that, the index of the orthogonal sequence in the PUCCH 1111 transmitted to the 4 symbols is not set separately, but in the set index, in order from the second, the first hop is [1] (1115), the second hop is [2] (1116). In this way, since the exponent value of the orthogonal sequence is set differently for each terminal, each terminal can be separately received.

[Method 2-3]

A relation table between the orthogonal sequence index corresponding to PUCCH format 1 and the index included in the orthogonal sequence may be newly designed. As described above, the method 2-1 has an advantage in that it can be mapped regardless of the symbol length. However, when intra-slot frequency hopping is configured, an orthogonal sequence may be mapped to only one symbol. In this case, when mapping is sequentially based on the PUCCH transmitting the longest symbol, the index of the orthogonal sequence may be set only to 0 regardless of the orthogonal sequence index. In this case, when UE multiplexing is performed, it is difficult to distinguish each UE because all UEs have mapped index values of the same orthogonal sequence. In order to solve this problem, the start of the index value mapped to the PUCCH transmitted to the long symbol may be set to a value other than 0, rather than different mapping as in Method 2-2. Thereafter, the orthogonal sequence generated for the PUCCH transmitted to the longest symbol may be sequentially mapped to the PUCCH transmitted to the short symbol. As an example, the relationship between the orthogonal sequence index corresponding to PUCCH format 1 and the index included in the orthogonal sequence may be represented as shown in Table 6 below.

[Table 6]

<Third embodiment>

Although the uplink control channel is repeatedly transmitted, the number of actually transmitted symbols may be different between each repeated transmission. In this case, when intra-slot frequency hopping is configured, it is necessary to determine how intra-slot frequency hopping should be applied because the number of symbols actually transmitted between repeated transmissions is different. In the case of intra-slot frequency hopping, a channel diversity gain can be obtained in the frequency domain, but channel estimation performance may be reduced because the number of DMRSs is reduced in the same frequency hop. Accordingly, the following methods for applying intra-slot frequency hopping when the number of symbols actually transmitted between repeated transmissions are different are proposed.

[Method 3-1]

When intra-slot frequency hopping is configured, intra-slot frequency hopping may be applied based on the number of symbols actually transmitted for each PUCCH repeated transmission. When intra-slot frequency hopping is applied based on the number of actually transmitted symbols, the maximum channel diversity gain can be obtained in the frequency domain.

12 is a flowchart illustrating an operation of a terminal receiving intra-slot frequency hopping configuration according to an embodiment of the present disclosure.

First, the base station informs the UE of the start symbol and length of the PUCCH transmission resource in the time domain, the number of repeated transmissions, and whether intra-slot frequency hopping is applied by higher layer signaling (eg, RRC signaling) or L1 signaling (eg, DCI) It can be set 1201 through . Based on the configuration, the UE determines (1202) repeated PUCCH transmission that is actually transmitted. (For example, it can be determined by the methods of Embodiment 1.) Finally, the PUCCH is transmitted (1204) by applying intra-slot frequency hopping (1203) based on the repeated PUCCH transmission actually transmitted.

13 is a diagram illustrating an intra-slot frequency hopping method for PUCCH according to an embodiment of the present disclosure.

Referring to FIG. 13, after repeated PUCCH transmission actually transmitted is determined (1311, 1321), intra-slot frequency hopping based on the number of symbols actually transmitted in each PUCCH repeated transmission (1312, 1313, 1322, 1323) (1314, 1324) can be performed.

[Method 3-2]

In the case of a PUCCH having a long number of symbols, diversity gain can be obtained in the frequency domain by performing intra-slot frequency hopping, but in the case of a PUCCH having a short number of symbols, intra-slot frequency hopping reduces the number of DMRSs for each hop, so channel estimation Since performance is reduced or the number of symbols for mapping uplink control information is reduced, a coding rate may increase and data detection performance may decrease. To solve this problem, when intra-slot frequency hopping is configured, intra-slot frequency hopping may be applied based on the set number of symbols rather than the number of actually transmitted symbols.

14 is a flowchart illustrating an operation of another terminal receiving intra-slot frequency hopping according to an embodiment of the present disclosure.

First, the base station informs the UE of the start symbol and length of the PUCCH transmission resource in the time domain, the number of repeated transmissions, and whether intra-slot frequency hopping is applied by higher layer signaling (eg, RRC signaling) or L1 signaling (eg, DCI) It can be set 1401 through . Before determining the actual transmitted PUCCH repeated transmission, intra-slot frequency hopping is applied based on PUCCH repeated transmission according to upper layer signaling or L1 signaling PUCCH configuration (1402). Thereafter, the UE determines (1403) repeated PUCCH transmission that is actually transmitted (it can be determined by the methods of Embodiment 1) and transmits (1404).

15 is a diagram illustrating an intra-slot frequency hopping method for PUCCH according to an embodiment of the present disclosure.

First, the base station informs the UE of the start symbol and length of the PUCCH transmission resource in the time domain, the number of repeated transmissions, and whether intra-slot frequency hopping is applied to higher layer signaling (eg, RRC signaling) or L1 signaling (eg, DCI) Intra-slot frequency hopping can be applied (1511, 1521) in the setting. Thereafter, each PUCCH ( 1513 , 1514 , 1523 , 1524 ) may be transmitted after determining repeated PUCCH transmission to be actually transmitted ( 1512 , 1522 ).

According to the method, it is possible to prevent a decrease in the number of DMRSs for each hop or a decrease in the number of symbols mapping uplink control information for each hop without applying intra-slot frequency hopping in a PUCCH having a short symbol, thus improving channel estimation performance or coding. rate may be reduced.

[Method 3-3]

As described above, PUCCH is mapped differently for each format and has different characteristics. Therefore, a different intra-slot frequency hopping method can be applied for each PUCCH format.

In the case of PUCCH format 1, the maximum number of UEs that can perform UE multiplexing is the same as the number of symbols to which UCI information is mapped except for DMRS transmitted on the same frequency (in one hop when intra-slot frequency hopping is set) has a Accordingly, if intra-slot frequency hopping is not performed for PUCCH transmitted in a short symbol and intra-slot frequency hopping is applied to PUCCH transmitted to a long symbol, the maximum number of UEs capable of UE multiplexing may increase. In addition, in the case of PUCCH format 1, since only 1 to 2 bits of UCI information are included, reception performance may be very dependent on channel estimation performance. Therefore, in the case of PUCCH transmitted in a short symbol, if intra-slot frequency hopping is not performed, the number of DMRSs in the same frequency band increases, so that channel estimation performance can be improved. Conversely, since PUCCH format 3/4 includes more UCI bits compared to PUCCH format 1, the channel diversity gain in the frequency domain may be more important than the channel estimation performance. Therefore, improving the channel diversity gain in the frequency domain by performing intra-slot frequency hopping even in the PUCCH transmitted in a short symbol may bring greater help to reception performance.

16 is a flowchart illustrating an operation of another terminal receiving intra-slot frequency hopping configuration according to an embodiment of the present disclosure.

First, the base station informs the UE of the start symbol and length of the PUCCH transmission resource in the time domain, the number of repeated transmissions, and whether intra-slot frequency hopping is applied by higher layer signaling (eg, RRC signaling) or L1 signaling (eg, DCI) It can be set through (1601). The UE determines whether the configured PUCCH format is format 1 or format 3/4 (1602). In case of PUCCH format 1, intra-slot frequency hopping is applied based on repeated PUCCH transmission according to upper layer signaling or L1 signaling PUCCH configuration before determining repeated PUCCH transmission actually transmitted (1611). Thereafter, the UE determines (1612) repeated PUCCH transmission that is actually transmitted (it can be determined by the methods of Embodiment 1) and transmits (1630). When the PUCCH format is 3 or 4 in the PUCCH format determination, the UE determines 1621 repeated PUCCH transmission actually transmitted based on the configuration (it can be determined by the methods of Embodiment 1). Finally, the PUCCH is transmitted (1630) by applying intra-slot frequency hopping (1622) based on the repeated PUCCH transmission actually transmitted. Although the PUCCH format is divided into format 1 and format 3/4 in the above method, various formats can be applied. For example, it may be divided into format 0/2 and format 1/3/4, and may be divided into format 0/1 and format 2/3/4. Or, conversely, in the case of format 3/4, intra-slot frequency hopping may be applied first in the configured PUCCH repeated transmission, and in the case of format 1, intra-slot frequency hopping may be applied in the PUCCH to be actually transmitted.

[Method 3-4]

The base station may instruct the terminal of the intra-slot frequency hopping application method according to the current terminal and the base station environment through higher layer signaling or L1 signaling. That is, the methods 1 and 2 or 3 may be configured for the terminal according to the environment of the terminal and the base station. When the method is configured, the UE may apply intra-slot frequency hopping using the configured method until there is no additional configuration.

17 is a block diagram of a terminal according to an embodiment of the present disclosure.

Referring to FIG. 17 , the terminal 1700 may include a transceiver 1710 , a control unit (processor) 1720 , and a storage unit (memory) 1730 . According to an efficient channel and signal transmission/reception method in the 5G communication system corresponding to the above-described embodiment, the transmission/reception unit 1710 , the control unit 1720 , and the storage unit 1730 of the terminal 1700 may operate. However, components of the terminal 1700 according to an embodiment are not limited to the above-described example. According to another embodiment, the terminal 1700 may include more or fewer components than the aforementioned components. In addition, in a specific case, the transceiver 1710 , the controller 1720 , and the storage unit 1730 may be implemented in the form of a single chip.

The transceiver 1710 may include a transmitter and a receiver according to another embodiment. The transceiver 1710 may transmit/receive a signal to/from the base station. The signal may include control information and data. To this end, the transceiver 1710 may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying a received signal and down-converting the frequency. In addition, the transceiver 1710 may receive a signal through a wireless channel, output it to the controller 1720 , and transmit the signal output from the controller 1720 through a wireless channel.

The controller 1720 may control a series of processes in which the terminal 1700 may operate according to the above-described embodiment of the present disclosure. For example, the control unit 1720 may determine a symbol actually transmitted in the PUCCH repeated transmission configuration according to an embodiment of the present disclosure, a method of orthogonal sequence mapping to an actually transmitted PUCCH, and intra-slot frequency hopping applied to an actually transmitted PUCCH At least one of the methods may be performed. The storage unit 1730 may store control information or data such as frequency hopping information included in a signal obtained from the terminal 1700 and information related to simultaneously estimating a channel based on DMRS transmitted to a plurality of TTIs, and the control unit It may have an area for storing data necessary for the control of the 1720 and data generated during the control by the controller 1720 .

18 is a block diagram of a base station according to an embodiment.

Referring to FIG. 18 , the base station 1800 may include a transceiver 1810 , a control unit (processor) 1820 , and a storage unit (memory) 1830 . According to an efficient method for transmitting and receiving channels and signals in the 5G communication system corresponding to the above-described embodiment, the transceiver 1810 , the control unit 1820 , and the storage unit 1830 of the base station 1800 may operate. However, the components of the base station 1800 according to an embodiment are not limited to the above-described example. According to another embodiment, the base station 1800 may include more or fewer components than the above-described components. In addition, in a specific case, the transceiver 1810 , the control unit 1820 , and the storage unit 1830 may be implemented in the form of a single chip. The transceiver 1810 may include a transmitter and a receiver according to another embodiment. The transceiver 1810 may transmit/receive a signal to/from the terminal. The signal may include control information and data. To this end, the transceiver 1810 may include an RF transmitter for up-converting and amplifying the frequency of a transmitted signal, and an RF receiver for low-noise amplifying and down-converting a received signal. Also, the transceiver 1810 may receive a signal through a wireless channel, output it to the controller 1820 , and transmit a signal output from the controller 1820 through a wireless channel.

The controller 1820 may control a series of processes so that the base station 1800 can operate according to the above-described embodiment of the present disclosure. For example, the controller 1820 determines a symbol actually transmitted in the PUCCH repeated transmission configuration according to an embodiment of the present disclosure, a method of orthogonal sequence mapping to the actually transmitted PUCCH, and intra-slot frequency hopping to the actually transmitted PUCCH. At least one of the methods may be performed.

The storage unit 1830 stores the frequency hopping information determined by the base station 1800, control information such as information related to simultaneously estimating a channel based on the DMRS transmitted to a plurality of TTIs, data or control information received from the terminal, and data. It may have an area for storing data required for control by the controller 1820 and data generated during control by the controller 1820 .

On the other hand, the embodiments disclosed in the present specification and drawings are only presented as specific examples to easily explain the technical contents of the present disclosure and help the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure. That is, it is apparent to those of ordinary skill in the art to which the present disclosure pertains that other modifications can be implemented based on the technical spirit of the present disclosure. In addition, each of the above embodiments may be operated in combination with each other as needed.

Claims (1)

A control signal processing method in a wireless communication system, comprising:
Receiving a first control signal transmitted from the base station;
processing the received first control signal; and
and transmitting a second control signal generated based on the processing to the base station.

Images