Method and device for transmitting and receiving uplink control channel

Abstract

A method for transmitting a physical uplink control channel (PUCCH) by a user equipment (UE) in a wireless communication system is disclosed. The method includes: receiving information about an index of a PUCCH resource set for the PUCCH and the number of resource blocks (RBs) for the PUCCH; and transmitting the PUCCH through a PUCCH resource based on a first RB offset. A second RB offset of the PUCCH resource set is obtained based on the index, and a first RB offset is obtained by multiplying the number of RBs by the second RB offset.

Description

Technical Field

[0001] The present disclosure relates to a method and apparatus for transmitting and receiving an uplink control channel. More specifically, the present disclosure relates to a method and apparatus for determining a physical uplink control channel (PUCCH) resource according to an initial PUCCH resource set in a high frequency unlicensed band above 52.6 GHz. Background Art

[0002] As more and more communication devices require greater communication services in line with the current trend, the next-generation fifth-generation (5G) system is needed to provide enhanced wireless broadband communication compared to the traditional LTE system. In the next-generation 5G system, communication scenarios are divided into enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), massive machine type communication (mMTC), etc.

[0003] In this article, eMBB is a next-generation mobile communication scenario characterized by high spectral efficiency, high user experience data rate, and peak data rate, URLLC is a next-generation mobile communication scenario characterized by ultra-high reliability, ultra-low latency, and ultra-high availability (e.g., vehicle-to-everything (V2X), emergency services, and remote control), and mMTC is a next-generation mobile communication scenario characterized by low cost, low energy, short packets, and massive connections (e.g., the Internet of Things (IoT)). Summary of the invention

[0004] Technical issues

[0005] An object of the present disclosure is to provide a method for transmitting and receiving an uplink control channel and an apparatus thereof.

[0006] Those skilled in the art will understand that the objectives that can be achieved by the present disclosure are not limited to what has been specifically described above, and the above and other objectives that can be achieved by the present disclosure can be clearly understood from the following detailed description.

[0007] Technical Solution

[0008] According to one aspect of the present disclosure, a method for transmitting a physical uplink control channel (PUCCH) by a user equipment (UE) in a wireless communication system is provided, comprising: receiving information about an index of a PUCCH resource set for the PUCCH and the number of resource blocks (RBs) for the PUCCH; and transmitting the PUCCH through a PUCCH resource based on a first RB offset. A second RB offset of the PUCCH resource set may be obtained based on the index, and the first RB offset may be obtained by multiplying the number of RBs by the second RB offset.

[0009] The PUCCH may be based on PUCCH format 0 or PUCCH format 1.

[0010] The information may be received via a system information block (SIB).

[0011] The PUCCH resource set may be an initial PUCCH resource set used before a dedicated PUCCH resource set for the UE is configured.

[0012] The PUCCH may be transmitted in frequency bands above 52.6 GHz.

[0013] The PUCCH may be transmitted through a plurality of RBs.

[0014] In another aspect of the present invention, there is provided a user equipment (UE) for transmitting a physical uplink control channel (PUCCH) in a wireless communication system, comprising: at least one transceiver; at least one processor; and at least one memory, the at least one memory being operably connected to the at least one processor and configured to store instructions, which when executed cause the at least one processor to perform operations. The operations include: receiving, by at least one transceiver, information related to an index of a PUCCH resource set for the PUCCH and the number of resource blocks (RBs) for the PUCCH; and transmitting, by at least one transceiver, the PUCCH using a PUCCH resource based on a first RB offset. A second RB offset of the PUCCH resource set can be obtained based on the index, and the first RB offset can be obtained by multiplying the number of RBs by the second RB offset.

[0015] The PUCCH may be based on PUCCH format 0 or PUCCH format 1.

[0016] The information may be received via a system information block (SIB).

[0017] The PUCCH resource set may be an initial PUCCH resource set used before a dedicated PUCCH resource set for the UE is configured.

[0018] The PUCCH may be transmitted in frequency bands above 52.6 GHz.

[0019] The PUCCH may be transmitted through a plurality of RBs.

[0020] In another aspect of the present invention, there is provided an apparatus for transmitting a physical uplink control channel (PUCCH) in a wireless communication system, comprising: at least one processor; and at least one memory, the at least one memory being operably connected to the at least one processor and configured to store instructions, which, when executed, cause the at least one processor to perform operations. The operations include: receiving information related to an index of a PUCCH resource set for the PUCCH and the number of resource blocks (RBs) for the PUCCH; and transmitting the PUCCH through a PUCCH resource based on a first RB offset. A second RB offset of the PUCCH resource set may be obtained based on the index, and the first RB offset may be obtained by multiplying the number of RBs by the second RB offset.

[0021] In another aspect of the present disclosure, a computer-readable storage medium is provided herein, including: at least one computer program, the at least one computer program causing at least one processor to perform operations. The operations include: receiving information related to an index of a PUCCH resource set for a PUCCH and the number of resource blocks (RBs) for the PUCCH; and sending a PUCCH through a PUCCH resource based on a first RB offset. A second RB offset of the PUCCH resource set may be obtained based on the index, and the first RB offset may be obtained by multiplying the number of RBs by the second RB offset.

[0022] In another aspect of the present disclosure, a method for receiving a physical uplink control channel (PUCCH) by a base station (BS) in a wireless communication system is provided herein, comprising: transmitting information related to an index of a PUCCH resource set for the PUCCH and the number of resource blocks (RBs) for the PUCCH; and receiving the PUCCH through a PUCCH resource based on a first RB offset. The index may be used to represent a second RB offset of the PUCCH resource set, and the first RB offset may be obtained by multiplying the number of RBs by the second RB offset.

[0023] In another aspect of the present disclosure, there is provided a base station (BS) for receiving a physical uplink control channel (PUCCH) in a wireless communication system, comprising: at least one transceiver; at least one processor; and at least one memory, the at least one memory being operably connected to the at least one processor and configured to store instructions, which when executed cause the at least one processor to perform operations. The operations include: sending information related to an index of a PUCCH resource set for the PUCCH and the number of resource blocks (RBs) for the PUCCH through at least one transceiver; and receiving the PUCCH through a PUCCH resource based on a first RB offset through at least one transceiver. The index can be used to represent a second RB offset of the PUCCH resource set, and the first RB offset can be obtained by multiplying the number of RBs by the second RB offset.

[0024] Beneficial Effects

[0025] According to the present disclosure, PUCCH transmission with high efficiency and appropriate coverage can be performed by improving the resource allocation scheme of the traditional PUCCH format based on regulatory requirements such as maximum output power limit and power spectral density (PSD) to support new radio (NR) systems in high frequency bands above 52.6 GHz.

[0026] Those skilled in the art will recognize that the effects that can be achieved using the present disclosure are not limited to the contents that have been specifically described above, and other advantages of the present disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 illustrates physical channels in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and a general signal transmission method using the same;

[0028] Figure 2 illustrates the radio frame structure;

[0029] Figure 3 illustrating a resource grid during the duration of a time slot;

[0030] Figure 4 The figure shows a wireless communication system supporting unlicensed bands;

[0031] Figure 5 An exemplary method of occupying resources in an unlicensed band is illustrated;

[0032] Figure 6 illustrates an exemplary channel access procedure for a UE applicable to UL signal transmission in an unlicensed band of the present disclosure;

[0033] Figure 7 is a diagram for explaining a resource allocation method for UL transmission in a shared spectrum applicable to the present disclosure;

[0034] Figure 8 illustrates an exemplary mapping of physical channels in time slots;

[0035] Fig. 9 The figure shows the transmission process of Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH);

[0036] Figures 10 to 12 is a diagram for explaining an operation process of a UE and a BS according to an embodiment of the present disclosure;

[0037] Fig.13 An exemplary communication system applicable to the present disclosure is illustrated;

[0038] Fig.14 illustrates an exemplary wireless device suitable for use with the present disclosure; and

[0039] Fig.15 An exemplary vehicle or autonomous vehicle suitable for use with the present disclosure is shown. DETAILED DESCRIPTION

[0040] The following technology can be used in various wireless access systems, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Worldwide Interoperability for Microwave Access (WiMAX)), IEEE 802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA, and LTE Advanced (LTE-A) is an evolution of 3GPP LTE. 3GPP New Radio or New Radio Access Technology (NR) is an evolved version of 3GPP LTE / LTE-A.

[0041] Although the following description is given in the context of a 3GPP communication system (e.g., NR) for clarity, the technical spirit of the present disclosure is not limited to the 3GPP communication system. For background technology, the terms and abbreviations used in the present disclosure refer to technical specifications (e.g., 38.211, 38.212, 38.213, 38.214, 38.300, 38.331, etc.) published before the present disclosure.

[0042] 5G communication involving a new radio access technology (NR) system will be described below.

[0043] The three key requirement areas for 5G are (1) enhanced mobile broadband (eMBB), (2) massive machine-type communications (mMTC), and (3) ultra-reliable and low-latency communications (URLLC).

[0044] Some use cases may require optimization in multiple dimensions, while others may focus on just one key performance indicator (KPI). 5G supports this variety of use cases in a flexible and reliable manner.

[0045] eMBB goes far beyond basic mobile Internet access and covers rich interactive work, media and entertainment applications in the cloud or augmented reality (AR). Data is one of the key drivers for 5G, and in the 5G era, we may see no dedicated voice services for the first time. In 5G, it is expected that voice is simply processed as an application using the data connection provided by the communication system. The main driving force for the increased traffic is the increase in the size of the content and the number of applications that require high data rates. As more devices are connected to the Internet, streaming services (audio and video), interactive video, and mobile Internet connections will continue to be more widely used. Many of these applications require always-on connections to push real-time information and notifications to users. Cloud storage and applications for mobile communication platforms are increasing rapidly. This applies to both work and entertainment. Cloud storage is a specific use case that drives the growth of uplink data rates. 5G will also be used for remote work in the cloud, which requires much lower end-to-end latency when done using a tactile interface in order to maintain a good user experience. Entertainment (e.g., cloud gaming and video streaming) is another key driver for increased demand for mobile broadband capacity. Entertainment is very important on smartphones and tablets anywhere, including high mobility environments such as trains, cars and airplanes. Another use case is AR and information search for entertainment, which requires very low latency and large amounts of real-time data.

[0046] One of the most anticipated 5G use cases is the ability to actively connect embedded sensors in every field, i.e. mMTC. It is expected that there will be 20.4 billion potential Internet of Things (IoT) devices by 2020. In industrial IoT, 5G is one of the areas that will play a key role in enabling smart cities, asset tracking, smart utilities, agriculture, and secure infrastructure.

[0047] URLLC includes services that will transform industries utilizing ultra-reliable / available low-latency links, such as remote control of critical infrastructure and self-driving vehicles. Reliability and latency levels are critical for smart grid control, industrial automation, robotics, drone control and coordination, etc.

[0048] Now, multiple use cases in a 5G communication system including an NR system will be described in detail.

[0049] 5G can complement fiber-to-the-home (FTTH) and cable-based broadband (or cable data service interface specification (DOCSIS)) as a means of delivering streams at data rates ranging from hundreds of megabits per second to gigabits per second. Such high speeds are needed for television broadcasts with resolutions of 4K (6K, 8K, and higher) or higher, as well as virtual reality (VR) and AR. VR and AR applications mainly include immersive sports games. Specific applications may require special network configurations. For example, for VR games, gaming companies may have to integrate core servers with network operators' edge network servers in order to minimize latency.

[0050] The automotive industry is expected to become a very important new driver of 5G, where many use cases are used for mobile communications in vehicles. For example, the entertainment of passengers requires mobile broadband with both high capacity and high mobility, as future users will expect to continue their good quality connection independently of their location and speed. Other use cases in the automotive industry are AR dashboards. These displays overlay information on what the driver sees through the front window, identifying objects in the dark and telling the driver the distance and movement of objects. In the future, wireless modules will enable communication between the vehicles themselves, between the vehicle and the supporting infrastructure, and between the vehicle and other connected devices (e.g., those carried by pedestrians). Safety systems can guide drivers in alternative courses of action to allow them to drive more safely and reduce the risk of accidents. The next stage will be remote-controlled or self-driving vehicles. These require very reliable, very fast communication between different self-driving vehicles and between vehicles and infrastructure. In the future, self-driving vehicles will perform all driving activities, while the driver focuses on the elusive traffic anomalies of the vehicle itself. The technical needs of self-driving vehicles require ultra-low latency and ultra-high reliability, raising traffic safety to a level that people cannot achieve.

[0051] Smart cities and smart homes (often referred to as smart societies) will be embedded with dense wireless sensor networks. Distributed networks of smart sensors will identify conditions for cost and energy-saving maintenance in cities or homes. A similar setup can be done for each home, where temperature sensors, window and heating controls, burglar alarms, and home appliances are all wirelessly connected. Many of these sensors are typically characterized by low data rates, low power, and low cost, but for example, real-time high-definition (HD) video may be required for monitoring in certain types of equipment.

[0052] The consumption and distribution of energy (including heat or gas) is becoming highly decentralized, creating a need for automatic control of very decentralized sensor networks. Smart grids interconnect these sensors, using digital information and communication technologies to collect and act on information. This information can include information about the behavior of suppliers and consumers, allowing smart grids to improve the efficiency, reliability, economy and sustainability of the production and distribution of fuels such as electricity in an automated manner. Smart grids can be viewed as another sensor network with low latency.

[0053] The health sector has many applications that can benefit from mobile communications. Communication systems enable telemedicine that provides remote clinical health care. It helps eliminate distance barriers and can improve access to medical services that are not always available in remote rural communities. It is also used to save lives in critical care and emergency situations. Wireless sensor networks based on mobile communications can provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

[0054] Wireless and mobile communications are becoming increasingly important for industrial applications. Wires are expensive to install and maintain, and the possibility of replacing them with reconfigurable wireless links is an attractive opportunity for many industries. However, achieving this requires wireless connections to work with similar latency, reliability, and capacity as cables, and to simplify their management. Low latency and very low probability of error are new requirements that need to be addressed with 5G.

[0055] Finally, logistics and freight tracking are important use cases for mobile communications, which enable tracking of inventory and packages anytime, anywhere by using location-based information systems. Logistics and freight tracking use cases typically require lower data rates but require wide coverage and reliable location information.

[0056] Figure 1 Illustrated is a diagram of physical channels in a 3GPP system and a general signal transmission method using the physical channels.

[0057] When the UE is powered on or enters a new cell, the UE performs an initial cell search (S11). The initial cell search involves the acquisition of synchronization with the BS. To this end, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE synchronizes its timing with the BS and obtains information such as a cell identifier (ID) based on the PSS / SSS. In addition, the UE can obtain information broadcast in the cell by receiving a PBCH from the BS. During the initial cell search, the UE can also monitor the DL channel status by receiving a downlink reference signal (DL RS).

[0058] After the initial cell search, the UE may acquire more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) corresponding to the PDCCH (S12).

[0059] Subsequently, in order to complete the connection to the BS, the UE may perform a random access procedure with the BS (S13 to S16). Specifically, the UE may send a preamble on a physical random access channel (PRACH) (S13), and may receive a PDCCH and a random access response (RAR) to the preamble on a PDSCH corresponding to the PDCCH (S14). The UE may then send a physical uplink shared channel (PUSCH) (S15) by using the scheduling information in the RAR, and perform a contention resolution procedure, including receiving a PDCCH and a PDSCH signal corresponding to the PDCCH (S16).

[0060] When the random access procedure is performed in two steps, steps S13 and S15 may be performed as one step (wherein message A is transmitted by the UE), and steps S14 and S16 may be performed as one step (wherein message B is transmitted by the BS).

[0061] After the above process, in the general UL / DL signal transmission process, the UE can receive PDCCH and / or PDSCH from the BS (S17), and send a physical uplink shared channel (PUSCH) and / or a physical uplink control channel (PUCCH) to the BS (S18). The control information sent by the UE to the BS is generally referred to as uplink control information (UCI). UCI includes hybrid automatic repeat and request acknowledgment / negative acknowledgment (HARQ-ACK / NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indicator (CQI), precoding matrix index (PMI), rank indication (RI), etc. Typically, UCI is sent on PUCCH. However, if control information and data should be sent at the same time, control information and data can be sent on PUSCH. In addition, upon receiving a request / command from the network, the UE can send UCI on PUSCH irregularly.

[0062] Figure 2 The radio frame structure is shown.

[0063] In NR, UL and DL transmissions are configured in frames. Each radio frame has a length of 10 milliseconds and is divided into two half-frames of 5ms. Each half-frame is divided into five 1ms subframes. A subframe is divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 OFDM (A) symbols. When a normal CP is used, each time slot includes 14 OFDM symbols. When an extended CP is used, each time slot includes 12 OFDM symbols. Symbols may include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or discrete Fourier transform-extended OFDM (DFT-s-OFDM) symbols).

[0064] Table 1 exemplarily illustrates that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS in the normal CP case.

[0065] [Table 1]

[0066] SCS(15*2^u) <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz(u=0) 14 10 1 30KHz(u=1) 14 20 2 60KHz(u=2) 14 40 4 120KHz(u=3) 14 80 8 240KHz(u=4) 14 160 16

[0067] *N slot symb : The number of symbols in a time slot

[0068] *N frame,u slot : Number of time slots in a frame

[0069] *N subframe,u slot : Number of time slots in a subframe

[0070] Table 2 illustrates that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS in the extended CP case.

[0071] [Table 2]

[0072] SCS(15*2^u) <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0073] The frame structure is only an example, and the number of subframes, the number of time slots, and the number of symbols in the frame can be changed in various ways. In the NR system, different OFDM (A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of a time resource (e.g., a subframe, a time slot, or a transmission time interval (TTI)) consisting of the same number of symbols (for convenience, referred to as a time unit (TU)) can be configured differently between aggregated cells.

[0074] In NR, various parameter sets (or SCS) can be supported to support various fifth generation (5G) services. For example, with an SCS of 15kHz, wide areas in traditional cellular bands can be supported, while with an SCS of 30kHz or 60kHz, dense urban areas, lower latency, and wide carrier bandwidths can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25kHz can be supported to overcome phase noise.

[0075] The NR band can be defined by two types of frequency ranges (FR1 and FR2). FR1 and FR2 can be configured as described in Table 3 below. FR2 can be millimeter wave (mmW).

[0076] [Table 3]

[0077] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450MHz-7125MHz 15,30,60kHz FR2 24250MHz-52600MHz 60,120,240kHz

[0078] Figure 3 The resource grid during the duration of a time slot is illustrated. A time slot includes multiple symbols in the time domain. For example, a time slot includes 14 symbols in the normal CP case and 12 symbols in the extended CP case. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be carried out in active BWPs, and a UE can only activate one BWP. Each element in the resource grid can be called a resource element (RE) to which a complex symbol can be mapped.

[0079] Similar to Licensed Assisted Access (LAA) in the conventional 3GPP LTE system, unlicensed bands are also being considered for cellular communications in the 3GPP NR system. Unlike LAA, standalone (SA) operation is targeted in the NR cell in the unlicensed band (hereinafter referred to as NR unlicensed cell (Ucell)). For example, PUCCH, PUSCH, and PRACH transmissions can be supported in the NR Ucell.

[0080] On LAA UL, with the introduction of asynchronous HARQ process, there is no additional channel, such as Physical HARQ Indicator Channel (PHICH), for indicating HARQ-ACK information for PUSCH to the UE. Therefore, accurate HARQ-ACK information cannot be used to adjust the CW size in the UL LBT process. In the UL LBT process, when a UL grant is received in the nth subframe, the first subframe of the most recent UL transmission burst before the (n-3)th subframe has been configured as a reference subframe, and the CW size has been adjusted based on the New Data Indicator (NDI) for the HARQ process ID corresponding to the reference subframe. That is, when the BS switches the NDI for one or more transport blocks (TBs) or indicates that one or more TBs are retransmitted, a method has been introduced to increase the CW size to the next largest CW size of the currently applied CW size in the set of pre-agreed CW sizes under the assumption that the transmission of the PUSCH in the reference subframe has failed due to a collision with other signals, or to initialize the CW size to the minimum value (e.g., CW 4) under the assumption that the PUSCH in the reference subframe has been successfully transmitted without any collision with other signals. min ) method.

[0081] Figure 4 An exemplary wireless communication system supporting unlicensed bands that may be applicable to the present disclosure is shown.

[0082] In the following description, a cell operating in an authorized band (L band) is defined as an L cell, and a carrier of the L cell is defined as a (DL / UL) LCC. A cell operating in an unlicensed band (U band) is defined as a U cell, and a carrier of the U cell is defined as a (DL / UL) UCC. A carrier / carrier frequency of a cell may refer to an operating frequency (e.g., a center frequency) of the cell. A cell / carrier (e.g., CC) is generally referred to as a cell.

[0083] When the BS and UE send and receive signals on the LCC and UCC of carrier aggregation, such as Figure 4 As shown in (a), the LCC and UCC can be configured as a primary CC (PCC) and a secondary CC (SCC), respectively. The BS and the UE can send and receive signals on one UCC or on multiple carrier aggregation UCCs, such as Figure 4 (b) In other words, the BS and UE can send and receive signals only on (one or more) UCCs without using any LCC. For SA operation, PRACH, PUCCH, PUSCH and SRS transmission can be supported on UCell.

[0084] Signal transmission and reception operations in the unlicensed band as described in the present disclosure may be applied to the above-mentioned deployment scenarios (unless otherwise stated).

[0085] Unless otherwise stated, the following definitions apply to the following terms used in this disclosure.

[0086] - Channel: A carrier or a part of a carrier consisting of a set of consecutive RBs, where a channel access procedure (CAP) is performed in the shared spectrum.

[0087] - Channel Access Procedure (CAP): A procedure to evaluate channel availability based on sensing before signal transmission in order to determine whether (one or more) other communication nodes are using the channel. The basic sensing unit is a duration of T sl = 9us sensing time slot. The BS or UE senses the time slot during the sensing time slot duration. When the power detected in at least 4us within the sensing time slot duration is less than the energy detection threshold X thresh The sensing time slot duration is T sl is considered idle. Otherwise, the sensing time slot duration T sl Considered busy. CAP can also be called Listen Before Talk (LBT).

[0088] - Channel occupancy: Transmission(s) on the channel(s) from the BS / UE after the CAP.

[0089] - Channel Occupancy Time (COT): The total time that a BS / UE and any (one or more) BS / UEs sharing the channel occupancy perform (one or more) transmissions on the channel after the CAP. With respect to COT determination, if a transmission gap is less than or equal to 25us, the gap duration may be counted in the COT. The COT may be shared for transmissions between a BS and (one or more) corresponding UEs.

[0090] The COT may be shared for transmission between the BS and corresponding UE(s).

[0091] Specifically, sharing the UE-initiated COT with the BS may mean an operation in which the UE assigns to the BS a portion of a channel occupied by random backoff-based LBT (e.g., Category 3 (Cat-3) LBT or Category 4 (Cat-4) LBT), and when LBT is performed without random backoff (e.g., Category 1 (Cat-1) LBT or Category 2 (Cat-2) LBT) using a timing gap occurring before DL transmission starting from the UE's UL transmission end timing, after successfully confirming that the channel is idle through LBT, the BS performs DL transmission using the remaining COT of the UE.

[0092] Meanwhile, sharing the gNB-initiated COT with the UE may refer to an operation in which the BS assigns a portion of a channel occupied by LBT based on random backoff (e.g., Cat-3 LBT or Cat-4 LBT) to the UE, and when, after performing LBT (e.g., Cat-1 LBT or Cat-2 LBT) without random backoff using a timing gap occurring before UL transmission starting from the DL transmission end timing of the BS, the UE performs UL transmission using the remaining COT of the BS when the channel is idle after successful confirmation through LBT.

[0093] -DL transmission burst: A set of transmissions from a BS without any gaps greater than 16us. Transmissions from a BS separated by gaps greater than 16us are considered separate DL transmission bursts. The BS may perform (one or more) transmissions after a gap without sensing channel availability within a DL transmission burst.

[0094] -UL transmission burst: A set of transmissions from a UE without any gaps greater than 16us. Transmissions from a UE separated by gaps greater than 16us are considered separate UL transmission bursts. The UE may perform transmission(s) after a gap without sensing channel availability within a DL transmission burst.

[0095] -Discovery burst: A DL transmission burst including a set of (one or more) signals and / or (one or more) channels confined within a window and associated with a duty cycle. The discovery burst may include (one or more) transmissions initiated by the BS, including PSS, SSS, and cell-specific RS (CRS), and further including non-zero power CSI-RS. In an NR system, the discovery burst may include (one or more) transmissions initiated by the BS, which include at least SS / PBCH blocks and further include a CORESET of a PDCCH for scheduling a PDSCH carrying SIB1, a PDSCH carrying SIB1, and / or a non-zero power CSI-RS.

[0096] Figure 5An exemplary method of occupying resources in an unlicensed band is illustrated.

[0097] refer to Figure 5 , a communication node (e.g., BS or UE) operating in an unlicensed band should determine whether (one or more) other communication nodes are using a channel before signal transmission. To this end, the communication node may perform CAP to access (one or more) channels on which (one or more) transmissions are to be performed in the unlicensed band. CAP may be performed based on sensing. For example, a communication node may determine whether (one or more) other communication nodes are sending signals on (one or more) channels by carrier sensing (CS) before signal transmission. Determining that (one or more) other communication nodes are not transmitting signals is defined as confirming a clear channel assessment (CCA). In the presence of a CCA threshold (e.g., X) that has been predefined or configured by higher layer (e.g., RRC) signaling .... thresh ), when energy above the CCA threshold is detected in the channel, the communication node may determine that the channel is busy. Otherwise, the communication node may determine that the channel is idle. When the channel is determined to be idle, the communication node may start sending signals in the unlicensed band. CAP may be replaced by LBT.

[0098] Table 4 describes exemplary CAPs supported in NR-U.

[0099] [Table 4]

[0100]

[0101] In a wireless communication system supporting an unlicensed band, a cell (or carrier (e.g., CC)) or BWP configured for a UE may be a broadband with a larger bandwidth (BW) than conventional LTE. However, the BW of a CCA-required based on independent LBT operation may be limited according to regulations. A subband (SB) in which LBT is performed separately is defined as an LBT-SB. Then, multiple LBT-SBs may be included in one broadband cell / BWP. The RB set included in the LBT-SB may be configured by higher layer (e.g., RRC) signaling. Therefore, based on (i) the BW of the cell / BWP and (ii) the RB set allocation information, one or more LBT-SBs may be included in one cell / BWP. Multiple LBT-SBs may be included in the BWP of a cell (or carrier). The LBT-SB may be, for example, a 20-MHz band. The LBT-SB may include multiple consecutive (P)RBs in the frequency domain and may therefore be referred to as a (P)RB set.

[0102] The UE performs a Type 1 or Type 2 CAP for UL signal transmission in the unlicensed band. Typically, the UE may perform a CAP (e.g., Type 1 or Type 2) configured by the BS for UL signal transmission. For example, the CAP type indication information may be included in a UL grant (e.g., DCI format 0_0 or DCI format 0_1) that schedules PUSCH transmission.

[0103] In a Type 1 UL CAP, the length of the time period spanned by the sensing slots sensed as idle prior to the transmission(s) is random. The Type 1 UL CAP may be applied to the following transmissions.

[0104] - PUSCH / SRS transmission(s) scheduled and / or configured by the BS

[0105] - PUCCH transmission(s) scheduled and / or configured by the BS

[0106] - Transmission(s) associated with the Random Access Procedure (RAP)

[0107] Figure 6 A Type 1 CAP among CAPs for UEs applicable to UL signal transmission in an unlicensed band of the present disclosure is illustrated.

[0108] Now refer to Figure 6 UL signal transmission in the unlicensed band is described.

[0109] The UE may delay for a duration T d , senses whether the channel is idle during the sensing time slot duration in . After the counter N is decremented to 0, the UE may perform transmission (S634). According to the following process, the counter N is adjusted by sensing the channel during (one or more) additional time slot durations.

[0110] Step 1) Set N = N init , where N init is evenly distributed between 0 and CW P and go to step 4 (S620).

[0111] Step 2) If N>0 and the UE chooses to decrement the counter, N=N-1 is set (S640).

[0112] Step 3) Sense the channel during the additional time slot duration, and if the additional time slot duration is idle (Y), go to step 4. Otherwise (N), go to step 5 (S650).

[0113] Step 4) If N=0 (Y) (S630), stop CAP (S632). Otherwise (N), go to step 2.

[0114] Step 5) Sense the channel until the additional delay duration T d Busy sensing time slot or additional delay duration T d All time slots of are sensed as idle (S660).

[0115] Step 6) If the additional delay duration T d If the channel is sensed to be idle during all time slot durations (Y), go to step 4. Otherwise (N), go to step 5 (S670).

[0116] Table 5 illustrates that mp, minimum CW, maximum CW, maximum channel occupancy time (MCOT), and allowed CW size applied to CAP vary according to channel access priority level.

[0117] [Table 5]

[0118]

[0119] The deferral duration Td includes a duration Tf (16us) followed by mp consecutive time slot durations, where each time slot duration Tsl is 9us, and Tf includes a sensing time slot duration Tsl at the beginning of the 16-us duration. CWmin,p<=CWp<=CWmax,p. CWp is set to CWmin,p and may be updated (CW size update) based on an explicit / implicit reception response to a previous UL burst (e.g., PUSCH) prior to step 1. For example, CWp may be initialized to CWmin,p based on an explicit / implicit reception response to a previous UL burst, may be increased to the next higher allowed value, or may be maintained as an existing value.

[0120] In a Type 2 UL CAP, the length of the time period spanned by the sensing slots sensed as idle before (one or more) transmissions is deterministic. Type 2 UL CAPs are classified into Type 2A UL CAPs, Type 2B UL CAPs, and Type 2C UL CAPs. In a Type 2A UL CAP, the UE may send a signal immediately after the channel is sensed as idle during at least the sensing duration Tshort_dl (=25us). Tshort_dl includes a duration Tf (=16us) and an immediately following sensing slot duration. In a Type 2A UL CAP, Tf includes the sensing slot at the beginning of the duration. In a Type 2B UL CAP, the UE may send a signal immediately after the channel is sensed as idle during the sensing slot duration Tf (=16us). In a Type 2B UL CAP, Tf includes sensing slots within the last 9us of the duration. In a Type 2C UL CAP, the UE does not sense the channel before transmission.

[0121] In order to allow the UE to send UL data in the unlicensed band, the BS should succeed in the LBT operation to send the UL grant in the unlicensed band, and the UE should also succeed in the LBT operation to send the UL data. That is, the UE can attempt UL data transmission only when both the BS and the UE are successful in their LBT operations. In addition, because a delay of at least 4 milliseconds is involved between the UL grant and the scheduled UL data in the LTE system, an earlier access from another transmission node coexisting in the unlicensed band during this period can postpone the scheduled UL data transmission of the UE. In this context, a method of improving the efficiency of UL data transmission in the unlicensed band is being discussed.

[0122] In order to support UL transmission with relatively high reliability and relatively low time delay, NR also supports configured grant type 1 and configured grant type 2, in which the BS preconfigures time, frequency and code resources for the UE through higher layer signaling (e.g., RRC signaling) or both higher layer signaling and L1 signaling (e.g., DCI). In the case where no UL grant is received from the BS, the UE can perform UL transmission in resources configured with type 1 or type 2. In type 1, the periodicity of the configured grant, the offset from SFN=0, the time / frequency resource allocation, the number of repetitions, the DMRS parameters, the MCS / TB size (TBS), the power control parameters, etc. are all configured only by higher layer signaling such as RRC signaling, without L1 signaling. Type 2 is a scheme in which the periodicity and power control parameters of the configured grant are configured by higher layer signaling such as RRC signaling, and information about the remaining resources (e.g., the offset of the initial transmission timing, the time / frequency resource allocation, the DMRS parameters and the MCS / TBS) are indicated by activating DCI as L1 signaling.

[0123] The autonomous uplink (AUL) of LTE LAA and the configured grant of NR show large differences in the method of sending HARQ-ACK feedback for PUSCH that the UE has sent without receiving an UL grant, and the presence or absence of UCI sent together with PUSCH. Although the HARQ process is determined by the equation of the symbol index, symbol period, and number of HARQ processes in the configured grant of NR, explicit HARQ-ACK feedback information is sent in AUL downlink feedback information (AUL-DFI) in LTE LAA. In addition, in LTE LAA, whenever AUL PUSCH transmission is performed, UCI including information such as HARQ ID, NDI, and RV is also sent in AULUCI. In the case of the configured grant of NR, the BS identifies the UE by the time / frequency resources and DMRS resources used by the UE for PUSCH transmission, while in the case of LTE LAA, the BS identifies the UE by the UE ID explicitly included in the AUL UCI sent together with the PUSCH and DMRS resources.

[0124] Figure 7 Resource assignment for UL transmission in a shared spectrum is illustrated.

[0125] refer to Figure 7 (a), RBs in RB set #1 belonging to interlace #1 can be determined as PUSCH resources based on the resource assignment information of the PUSCH indicating {interlace #1, RB set #1}. That is, RBs corresponding to the intersection of {interlace #1, RB set #1} can be determined as PUSCH resources. Figure 7 (b), RBs belonging to interlace #2 in RB sets #1 and #2 can be determined as PUSCH resources based on the resource assignment information for PUSCH indicating {interlace #2, RB sets #1 and #2}. In this case, the guide band (GB) between RB set #1 and RB set #2 (i.e., GB #1) can also be used as a PUSCH transmission resource. That is, the RB corresponding to the intersection of {interlace #1, RB sets #1 and #2, GB #1} can be determined as a PUSCH resource. In this case, even if the GB is adjacent to RB sets #1 and #2, the GB that is not between RB set #1 and RB set #2 (i.e., GB #0) is not used as a PUSCH transmission resource.

[0126] Figure 8 An exemplary mapping of physical channels in time slots is illustrated.

[0127] DL control channel, DL or UL data and UL control channel can all be included in one time slot. For example, the first N symbols in the time slot (hereinafter referred to as the DL control area) can be used to send the DL control channel, and the last M symbols in the time slot (hereinafter referred to as the UL control area) can be used to send the UL control channel. N and M are integers equal to or greater than 0. The resource area (hereinafter referred to as the data area) between the DL control area and the UL control area can be used for DL ​​data transmission or UL data transmission. A time gap for DL ​​to UL or UL to DL switching can be defined between the control area and the data area. PDCCH can be sent in the DL control area, and PDSCH can be sent in the DL data area. Some symbols when switching from DL to UL in the time slot can be configured as time gaps.

[0128] UL channel structure

[0129] The UE transmits a relevant signal to the BS on a UL channel to be described later, and the BS receives a relevant signal from the UE through the UL channel to be described later.

[0130] (1) Physical Uplink Control Channel (PUCCH)

[0131] The PUCCH carries UCI, HARQ-ACK and / or Scheduling Request (SR), and is divided into a short PUCCH and a long PUCCH according to a PUCCH transmission length.

[0132] The UCI includes the following information.

[0133] -SR: Information used to request UL-SCH resources.

[0134] -HARQ-ACK: A response to a DL data packet (e.g., codeword) on the PDSCH. HARQ-ACK indicates whether the DL data packet has been successfully received. In response to a single codeword, a 1-bit HARQ-ACK may be sent. In response to two codewords, a 2-bit HARQ-ACK may be sent. The HARQ-ACK response includes a positive ACK (abbreviated as ACK), a negative ACK (NACK), a discontinuous transmission (DTX), or NACK / DTX. The term HARQ-ACK is used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0135] -CSI: Feedback information for DL ​​channels. Feedback information related to Multiple Input Multiple Output (MIMO) includes RI and PMI.

[0136] Table 6 illustrates an exemplary PUCCH format. Based on PUCCH transmission duration, the PUCCH format may be divided into short PUCCH (formats 0 and 2) and long PUCCH (formats 1, 3, and 4).

[0137] [Table 6]

[0138]

[0139] PUCCH format 0 conveys up to 2 bits of UCI and is mapped in a sequence-based manner for transmission. Specifically, the UE sends a specific UCI to the BS by sending one of multiple sequences on the PUCCH of PUCCH format 0. Only when the UE sends a positive SR, the UE sends the PUCCH of PUCCH format 0 in the PUCCH resources used for the corresponding SR configuration. PUCCH format 1 conveys up to 2 bits of UCI in the time domain, and spreads the modulation symbols of the UCI in the time domain with an orthogonal cover code (OCC) (which is configured differently depending on whether frequency hopping is performed). DMRS is transmitted as a symbol that does not transmit a modulation symbol (i.e., transmitted in time division multiplexing (TDM)).

[0140] PUCCH format 2 conveys more than 2 bits of UCI, and the modulation symbols of DCI are sent in frequency division multiplexing (FDM) with DMRS. DMRS are located in symbols #1, #4, #7, and #10 of a given RB with a density of 1 / 3. Pseudo-noise (PN) sequences are used for DMRS sequences. For 2-symbol PUCCH format 2, frequency hopping can be activated.

[0141] PUCCH format 3 does not support UE multiplexing in the same PRB and conveys UCI of more than 2 bits. In other words, the PUCCH resources of PUCCH format 3 do not include OCC. The modulation symbols are transmitted in TDM with DMRS.

[0142] PUCCH format 4 supports multiplexing of up to 4 UEs in the same PRB and conveys UCI of more than 2 bits. In other words, PUCCH resources of PUCCH format 3 include OCC. Modulation symbols are transmitted in TDM with DMRS.

[0143] (2) Physical Uplink Shared Channel (PUSCH)

[0144] The PUSCH carries UL data (e.g., UL shared channel transport block (UL-SCH TB)) and / or UL control information (UCI), and is transmitted based on a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, when transform precoding is not allowed (e.g., transform precoding is disabled), the UE may transmit the PUSCH based on the CP-OFDM waveform. When transform precoding is allowed (e.g., transform precoding is enabled), the UE may transmit the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. PUSCH transmission may be dynamically scheduled by a UL grant in the DCI, or may be semi-statically scheduled based on higher layer (e.g., RRC) signaling (and / or layer 1 (L1) signaling (e.g., PDCCH)) (configured grant). PUSCH transmission may be performed on a codebook basis or a non-codebook basis.

[0145] Fig. 9 It is a diagram for explaining HARQ transmission timing and PUSCH transmission timing and an assignment method.

[0146] HARQ-ACK is information indicating whether the UE has successfully received the physical DL channel. When the physical DL channel is successfully received, the UE feeds back ACK to the BS and, otherwise, the UE feeds back NACK to the BS. In NR, HARQ supports 1-bit HARQ-ACK feedback per transport block. Fig. 9 An example of HARQ-ACK timing K1 is illustrated.

[0147] exist Fig. 9 In, K0 represents the number of slots from the slot with the PDCCH carrying DL assignment (i.e., DL grant) to the slot with the corresponding PDSCH transmission, K1 represents the number of slots from the slot with the PDSCH to the slot with the corresponding HARQ-ACK transmission, and K2 represents the number of slots from the slot with the PDCCH carrying UL grant to the slot with the corresponding PUSCH transmission. That is, K0, K1, K2 can be simply summarized as listed in Table 7 below.

[0148] [Table 7]

[0149] A B K0 DL Scheduling DCI Corresponding DL data transmission K1 DL data reception Corresponding HARQ-ACK K2 UL Scheduling DCI Corresponding UL data transmission

[0150] The BS can provide HARQ-ACK feedback timing to the UE dynamically through DCI or semi-statically through RRC signaling. The NR system supports different minimum HARQ processing times for UEs. The HARQ processing time includes the delay between the DL data reception timing and the corresponding HARQ-ACK transmission timing and the delay between the UL grant reception timing and the corresponding UL data transmission timing. The UE sends information about its minimum HARQ processing time capability to the BS. From the UE's perspective, HARQ ACK / NACK feedback for multiple DL transmissions in the time domain can be sent in one UL data / control region. The timing between DL data reception and the corresponding ACK is indicated by the DCI.

[0151] Unlike LTE systems that perform transport block (TB)-based or codeword-based HARQ processes, NR systems support code block group (CBG)-based transmissions for single-bit / multi-bit HARQ-ACK feedback. TBs can be mapped to one or more code blocks (CBs) according to the size of the TB. For example, during the channel coding process, a cyclic redundancy check (CRC) code is attached to the TB. If the CRC-attached TB is not larger than a specific size, the CRC-attached TB corresponds to one CB. However, if the CRC-attached TB is larger than a specific size, the CRC-attached TB is divided into multiple CBs. In the NR system, the UE can be configured to receive CBG-based transmissions and can schedule retransmissions to carry a subset of all CBs of the TB.

[0152] refer to Fig. 9 , the UE may detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 and / or DCI format 1_1). The PDCCH indicates a DL assignment-to-PDSCH offset K0 and a PDSCH-to-HARQ-ACK reporting offset K1. For example, DCI format 1_0 and DCI format 1_1 may include the following information.

[0153] - Frequency domain resource assignment: indicates RB resources (eg, one or more (non-)contiguous RBs) assigned to the PDSCH.

[0154] - Time domain resource assignment: indicates K0 and the starting position (eg, OFDM symbol index) and length (eg, number of OFDM symbols) of the PDSCH in the time slot.

[0155] -PDSCH-to-HARQ_feedback timing indicator: indicates K1.

[0156] -HARQ process number (4 bits): indicates the HARQ process identification (ID) of the data (eg, PDSCH or TB).

[0157] - PUCCH resource indicator (PRI): indicates a PUCCH resource to be used for UCI transmission among a plurality of PUCCH resources in a PUCCH resource set.

[0158] Next, the UE can receive the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, and then send UCI on the PUCCH in time slot #(n+K1). The UCI includes a HARQ-ACK response to the PDSCH. In the case where the PDSCH is configured to carry up to one TB, the HARQ-ACK response can be configured in 1 bit. In the case where the PDSCH is configured to carry up to two TBs, if spatial bundling is not configured, the HARQ-ACK response can be configured as two bits, and if spatial bundling is configured, it can be configured as one bit. When time slot #(n+K1) is designated as the HARQ-ACK transmission timing for multiple PDSCHs, the UCI sent in time slot #(n+K1) includes HARQ-ACK responses to multiple PDSCHs.

[0159] refer to Fig. 9 , the UE may detect the PDCCH in time slot #n. The PDCCH includes UL scheduling information (eg, DCI format 0_0 and / or DCI format 0_1). DCI format 0_0 and DCI format 0_1 ​​may include the following information.

[0160] - Frequency domain resource assignment: indicates the RB set assigned to the PUSCH.

[0161] -Time domain resource assignment: indicates the slot offset K2 and the starting position (eg, symbol index) and length (eg, number of OFDM symbols) of the PUSCH in the slot. The starting symbol and length may be indicated by a start and length indication value (SLIV) or may be indicated separately.

[0162] Thereafter, the UE may transmit the PUSCH in slot #(n+k2) according to the scheduling information of slot #n. Here, the PUSCH includes the UL-SCH TB.

[0163] PUCCH resource set

[0164] In order to send UCI through PUCCH, the UE may receive a dedicated PUCCH resource configuration. This dedicated PUCCH resource configuration may include information about a PUCCH resource set. The information about the PUCCH resource set may include, for example, N PUCCH resources, a PUCCH format for each of the N PUCCH resources, a starting symbol, a PUCCH resource duration, a physical resource block (PRB) offset, and a cyclic shift (CS) set.

[0165] For example, the first PUCCH resource set of the dedicated PUCCH resource configuration may include a maximum of 32 PUCCH resources, and the remaining PUCCH resource sets of the dedicated PUCCH resource configuration may include a maximum of 8 PUCCH resources.

[0166] If interleaving is indicated for PUCCH transmission, the UE may transmit the PUCCH using frequency hopping. If interleaving is not indicated, the UE may transmit the PUCCH without frequency hopping.

[0167] Upon receiving downlink control information (DCI) scheduling PDSCH and sending HARQ-ACK through PUCCH as a response to the DCI, the UE can determine any one of the 16 PUCCH resources included in the PUCCH resource set to send HARQ-ACK through the determined PUCCH resource. For example, the UE determines the index of the PUCCH resource based on the number of control channel elements (CCEs) in the control resource set (CORESET) of the PDCCH including the DCI scheduling the PDSCH, the index of the first CCE of the PDCCH, and the value of the PUCCH resource indicator field included in the DCI scheduling the PDSCH. The UE can then send HARQ-ACK through the PUCCH resource corresponding to the determined index.

[0168] However, if the UE does not receive a dedicated PUCCH resource configuration (eg, before the BS sends a dedicated PUCCH resource configuration), the UE may acquire an index corresponding to any one of the rows of [Table 8] from pucch-ResourceCommon.

[0169] [Table 8]

[0170]

[0171] The UE may determine the index of the PRB used for PUCCH transmission based on the PRB offset of the PUCCH resource set corresponding to the acquired index of the PUCCH resource set, the index of the PUCCH resource set, the number of initial CS indexes included in the set of initial CS indexes, and the BWP size.

[0172] The UE may transmit a PUCCH through PUCCH resources according to a PUCCH format, a start symbol, and a symbol duration corresponding to the determined index of the PRB and the index of the PUCCH resource set.

[0173] In Release 15 NR PUCCH, 5 PUCCH formats (PUCCH formats 0 / 1 / 2 / 3 / 4) are defined for each purpose, taking into account payload size, coverage, and latency. In Release 16 NR in unlicensed spectrum (NR-U), a new PUCCH resource allocation method based on the interleaved RB allocation method in Release 15 PUCCH format is used to meet regulatory requirements for unlicensed bands such as occupied channel bandwidth (OCB) and power spectral density (PSD). Similarly, in Release 17, in order to support NR in high frequency bands above 52.6 GHz, it is necessary to improve the specific signal and channel design of the traditional Release 15 / 16. Taking into account the regulatory requirements of maximum output power limit and PSD limit in high frequency unlicensed bands above 52.6 GHz, the present disclosure proposes a method for enhancing the resource allocation method of the traditional PUCCH format.

[0174] NR supports multiple parameter sets (e.g., subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15kHz, wide areas in traditional cellular bands are supported. When the SCS is 30kHz or 60kHz, dense cities, lower latency, and wider BW are supported. When the SCS is higher than 60kHz, BW greater than 24.25GHz is supported to overcome phase noise.

[0175] The NR band defines two types of frequency ranges FR1 and FR2. FR1 and FR2 can be configured as shown in [Table 3] above. FR2 can represent millimeter wave (mmW).

[0176] A band higher than the frequency band mentioned above (for example, a band of 52.6 GHz to 114.25 GHz, particularly 71 GHz) is called FR 4. An area of ​​FR4 may be used as an unlicensed band.

[0177] When a particular node transmits a signal, a particular region / country may include restrictions on PSD and maximum output power in its regulations regarding unlicensed bands. For example, some bands in the FR4 region (e.g., band 75, c1) impose restrictions on transmissions that should meet a maximum output power of 40dBm and a PSD of 23dBm and 1MHz.

[0178] In order to transmit PUCCH using the maximum transmission power while meeting the proposed requirements, it is necessary to enhance the resource allocation method of the conventional PUCCH format. [Table 9] lists the total number of PRBs according to the SCS and BW defined in the FR2 region.

[0179] [Table 9]

[0180]

[0181] Based on [Table 9], the total number T of PRBs expected when the SCS is increased to 240 kHz, 480 kHz, or 960 kHz and the BW is increased to 800 MHz, 1600 MHz, and 2000 MHz is listed in [Table 10].

[0182] [Table 10]

[0183]

[0184] When the number of PRBs according to SCS and BW is defined as listed in [Table 10], it may not be easy to reuse the PUCCH format introduced in the legacy NR or NR-U. Therefore, the present disclosure proposes an enhanced PUCCH format and an enhanced initial PUCCH resource set for FR4. At the same time, the actual number of PRBs according to SCS and BW may be different from the number of PRBs in [Table 10]. However, based on the final number of PRBs, the following proposed method can be easily extended and applied.

[0185] In the FR4 area (e.g., a frequency band above 52.6 GHz), the power at which a node can send a signal to the maximum extent is limited together with the PSD rule. For example, a node may use a maximum power of 40 dBm. Therefore, the maximum power that can be sent in a PRB according to each SCS can be determined taking into account the PSD rule and the maximum power limit. The maximum number of PRBs to which power is allocated to the maximum extent according to each SCS without exceeding the maximum power limit can be calculated, as listed in [Table 11], [Table 12], and [Table 13]. [Table 11] shows a case where the PSD rule is 23 dBm / 1 MHz, and [Table 12] shows a case where the PSD rule is 13 dBm / 1 MHz.

[0186] [Table 11]

[0187]

[0188] [Table 12]

[0189]

[0190] In addition, the case where the PSD rule of each node is 38dBm / 1MHz and the maximum power limit is 55dBm can be as shown in [Table 13].

[0191] [Table 13]

[0192]

[0193] In particular, the number of PRBs (# of PRBs) is obtained identically in [Table 11] and [Table 13]. Here, the examples of [Table 11] and [Table 13] are based on the ETSI regulatory requirements in Europe. If the number of PRBs obtained by the regulatory requirements of other regions is different from those of [Table 11] and [Table 13], the number of PRBs obtained based on the regulatory requirements of other regions may be applied to the proposed method of the present disclosure.

[0194] Considering the PSD requirement and the maximum power limit, the minimum number of PRBs per SCS can be calculated. In order for the BS to allow the UE to transmit PUCCH based on the maximum power, the BS needs to allocate resources with a number of PRBs equal to or greater than those calculated in [Table 11] to [Table 13].

[0195] Therefore, in order to transmit PUCCH based on the maximum power of the UE, the following method can be proposed. In the proposed method, the proposed PRB number basically represents the number of consecutive PRBs used for PUCCH format 0 / 1 / 2 / 3 / 4 transmission, but can be extended to interleaved PRB types. Hereinafter, the present disclosure will propose an enhanced resource allocation method for each PUCCH format, a resource allocation method for PUCCH resources constituting an initial PUCCH resource set, and a PRB offset configuration method.

[0196] Each proposed method described below can be applied in combination with other proposed methods unless each proposed method conflicts with other proposed methods.

[0197] Before describing the proposed method according to the present disclosure, an overall operation procedure of a UE and a BS for implementing the proposed method according to the present disclosure will now be described.

[0198] Fig.10 The figure illustrates the overall operation process of the UE according to the proposed method of the present disclosure.

[0199] refer to Fig.10 , the UE may receive information about the number of RBs used for the PUCCH (S1001). Details about the type of information and / or the contents included in the information may be based on at least one of [Proposed Method #1] to [Proposed Method #4] or [Proposed Method #6].

[0200] The UE may determine the PUCCH resources based on the number of RBs and the PRB offset (S1003). The specific method by which the UE determines the PUCCH resources may be based on at least one of [Proposed Method #2] or [Proposed Method #5].

[0201] The UE may send the PUCCH through the determined PUCCH resource ( S1005 ).

[0202] Fig.11 The overall operation process of the BS according to the proposed method of the present disclosure is illustrated.

[0203] refer to Fig.11 , the BS may transmit information related to the number of RBs used for the PUCCH to the UE (S1101). Details on the type of information and / or contents included in the information may be based on at least one of [Proposed Method #1] to [Proposed Method #4] or [Proposed Method #6].

[0204] The BS may receive the PUCCH through the PUCCH resources (S1103). The PUCCH resources are determined based on the number of RBs and the PRB offset. The detailed method of determining the PUCCH resources may be based on at least one of [Proposed Method #2] or [Proposed Method #5].

[0205] Fig.12 The overall operation process of the network according to the proposed method of the present disclosure is illustrated.

[0206] refer to Fig.12 , the BS may transmit information related to the number of RBs used for the PUCCH to the UE (S1201). Details on the type of information and / or contents included in the information may be based on at least one of [Proposed Method #1] to [Proposed Method #4] or [Proposed Method #6].

[0207] The UE may determine the PUCCH resources based on the number of RBs and the PRB offset (S1203). The specific method by which the UE determines the PUCCH resources may be based on at least one of [Proposed Method #2] or [Proposed Method #5].

[0208] The UE may transmit a PUCCH to the BS through the determined PUCCH resource (S1205).

[0209] Now it will be based on Figures 10 to 12 The proposed method of the present disclosure is described in detail.

[0210] [Proposed Method #1]

[0211] Considering regulatory requirements such as PSD limit and maximum output power limit, the number of RBs available in the BWP, the number of resources constituting the initial PUCCH resource set, UE multiplexing, and multiplexing between other neighboring cells through PRB offset, configuration / indication of N as the number of RBs to be used for PUCCH format 0 / 1 transmission will now be described. RB method.

[0212] 1. Example #1-1

[0213] Based on the number of available RBs according to the SCS configured for the initial BWP and the BW size of the BWP, N may be configured / calculated taking into account PUCCH resource multiplexing with other neighboring cells based on PRB offsets. RB , so that the number of FDM resources in each PUCCH resource set in each cell will not be insufficient.

[0214] (1) If the BS provides information about the SCS and BW size of the initial BWP, the UE can implicitly calculate N by [Equation 1] RB In this case, the PRB offset may need to be increased by N as described in [Proposed Method #2] below. RB or k*N RB To scale the PRB offset of [Table 8]. In other words, the PRB offset can use the PRB offset of [Table 8] or by N RB or k*N RB The value obtained by scaling the PRB offset of [Table 8].

[0215] [Equation 1]

[0216]

[0217] (2) If the BS provides information about the SCS and BW size of the initial BWP, the UE can implicitly calculate N by [Equation 2] RB In [Equation 2], β is used to perform multiplexing between other neighboring cells and may be configured / indicated by the BS or defined in the specification.

[0218] [Equation 2]

[0219]

[0220] (3) Considering the multiplexing with other channels, it is possible to calculate N based on a value less than or equal to the value calculated based on (1) of Example #1-1 or (2) of Example #1-1. RB The maximum value among the values ​​2 n , use a maximum of 2 n In an embodiment, PUCCH is sent using RBs.

[0221] (4) Taking into account the initial PUCCH resource set to be used by other neighboring cells, N calculated based on (1) of embodiment #1-1 or (2) of embodiment #1-1 may be calculated with respect to all PUCCH resource set indices. RB And in the calculated N RB The minimum N among the values RBThe value may be used to send PUCCH.

[0222] Hereinafter, [Proposed Method #1] will be described in detail.

[0223] As mentioned above, the PSD limit or maximum output power limit may vary according to each region / country's regulatory requirements for a particular band.

[0224] [Proposed method #1] provides a method that takes into account the above regulatory requirements, the number of available RBs for each SCS and BW size supported in bands above 52.6 GHz, the number of resources constituting the initial PUCCH resource set, and the number of RBs multiplexed by the UE to configure / indicate the number of RBs to be used for PUCCH format 0 / 1 transmission. In the case of conventional Release 15, PUCCH format 0 / 1 is transmitted using only one RB, and if the transmission method of PUCCH format 0 / 1 of Release 15 is also applied even in the 52.6 GHz band, the output power may not be sufficient and thus the coverage may be insufficient.

[0225] However, if the number of RBs to be used for PUCCH transmission is over-configured in order to solve the coverage problem, the resources to be used for FDM between UEs in the cell may be insufficient. Therefore, there is a need for a method to configure / indicate an appropriate number of N for bands above 52.6 GHz. RB method.

[0226] For example, the minimum number of PRBs calculated in consideration of the PSD requirement and the maximum power limit for each SCS may be listed in [Table 14]. The minimum number of PRBs of Table 14 has been calculated based on the European Band 75 (cl) requirement.

[0227] [Table 14]

[0228] SCS(kHz) Minimum # of PRBs 120 35 240 18 480 9 960 5

[0229] As a method of configuring PUCCH format 0 / 1 with the number of PRBs that satisfies [Table 14], a method of configuring the sequence used for PUCCH format 0 / 1 as a long sequence having a length corresponding to the minimum number of PRBs calculated while taking into account the PSD requirement and the maximum output power limit may be considered.

[0230] For example, if the number of PRBs calculated taking into account the PSD requirement and the maximum power limit is determined as listed in [Table 14], the sequence length applicable to PUCCH format 0 / 1 may be proposed as in [Table 15]. The sequence length proposed in [Table 15] is the largest prime number among the numbers less than the total number of REs.

[0231] In the current specification, if the sequence length is 36 or less, a sequence based on a computer generated sequence (CGS) is used. If the sequence length is 36 or more, a Zadoff-Chu (ZC) sequence is also used. Therefore, in [Table 15], since all sequence lengths according to SCS are above 36, a ZC sequence can be used.

[0232] [Table 15]

[0233] SCS(kHz) Minimum # of PRBs RE's# Sequence length (ZC) 120 35 420 419 240 18 216 211 480 9 108 107 960 5 60 59

[0234] The table of initial PUCCH resource sets for NR is listed in [Table 8].

[0235] Referring to [Table 8], when the "set of initial CS indices" includes two elements (e.g., indices 0, 3, 7, and 11) in NR, since PUCCH format 0 / 1 is transmitted using a single PRB (i.e., since one PRB is one FDM resource), a total of 8 PRBs are required.

[0236] When the "initial CS index set" includes 3 elements (e.g., indexes 1 and 2), a total of 6 PRBs are required. When the "initial CS index set" includes 4 elements (e.g., indexes 4, 5, 6, 8, 9, 10, 12, 13, 14, and 15), a total of 4 PRBs are required.

[0237] In FR4, taking into account the PSD requirements and maximum power limits as described above, the minimum PRB value may be defined as listed in [Table 14]. In order to apply the minimum PRB value to the initial PUCCH resource set, the number of PRBs corresponding to one FDM resource may be configured as the minimum number of PRBs as listed in [Table 14]. As described above, when the "set of initial CS indices" of [Table 8] includes two elements (e.g., indices 0, 3, 7, and 11), a total of 8 FDM resources are required. Whether the 8 FDM resources are configurable may be indicated based on each SCS value and / or the nominal BW (carrier / BWP BW) size as listed in [Table 16].

[0238] [Table 16] Minimum number of PRBs based on [Table 14].

[0239] [Table 16]

[0240]

[0241] Referring to [Table 16], when the nominal BW (carrier / BWP BW) size is 200 MHz or 400 MHz, 8 FDM resources cannot be ensured for all SCS values.

[0242] When the "initial CS index set" of [Table 8] includes 3 elements (e.g., indexes 1 and 2), a total of 6 FDM resources are required. Whether 6 FDM resources are configurable can be indicated according to each SCS value and / or nominal BW (carrier / BWP BW) size as listed in [Table 17]. [Table 17] can be based on the minimum PRB number of [Table 14].

[0243] [Table 17]

[0244]

[0245] Referring to [Table 17], when the nominal BW (carrier / BWP BW) size is 200 MHz, 6 FDM resources cannot be secured for all SCS values.

[0246] Therefore, in FR4, if the initial PUCCH resource set of the legacy NR is applied without change, FDM resources may not be ensured as described above. To solve this problem, the following method can be adopted in FR4 when the initial PUCCH resource set is used.

[0247] For example, when the SCS of the initial BWP in [Table 16] is 120 kHz and the BW size is 400 MHz, if a PUCCH resource set (through the remaining minimum system information (RMSI)) in which the "set of initial CS indices" includes two elements (e.g., indices 0, 3, 7, and 11) is indicated, because a total of 8 FDM resources are required (i.e., 8*N are required), RB PRBs), so based on the number of available RBs in a BWP is 264, if only a single cell is considered, then N PRBs for PUCCH transmission are RB Can be set to 33.

[0248] In order to transmit the PUCCH at the maximum output power allowed by regulatory requirements, although at least 35 RBs should be used, 33 RBs, which are less than 35 RBs, are used to match the BW size of the initial BWP and the number of available FDM resources to 8.

[0249] However, in practice, because multiplexing (e.g., FDM) with the initial PUCCH resource set used by other neighboring cells should be considered, it is necessary to configure PUCCH resources using the remaining RBs except for as many RBs as the PRB offset*2 of the initial PUCCH resource set indicated by RMSI, taking into account the RBs to be used by other cells among the total number of RBs available in the initial BWP. Therefore, N should be derived by substituting the above example into [Equation 1] and / or [Equation 2]. RB =17.

[0250] In [Equation 1] of (1) of Embodiment #1-1, since the PRB offset value is expressed as N RB , so the effect of applying the PRB offset to multiplexing between other neighboring cells can be derived similarly to using β, which can be configured / indicated by the BS or defined in the specification, to replace the PRB offset value of [Equation 1], as in [Equation 2] of (2) of Example #1-1. In this case, β is a value configured independently of the PRB offset. For example, when allocating 2*N for one PUCCH resource set RB In a structure with 1 PRB, β can be set to 0.5.

[0251] Taking into account the multiplexing with other channels, when the value is less than or equal to N calculated based on (1) of Example #1-1 or (2) of Example #1-1 RB The maximum value among the values ​​2 n 2 which can be determined as used for PUCCH transmission n RBs.

[0252] For example, when the calculated N RB When the value is 33 or 22, the 2 channels smaller than 33 or 22 can be used in consideration of multiplexing with other channels. n A maximum value of 32 or 16 is used as the number of RBs for PUCCH transmission.

[0253] Considering that the initial PUCCH resource set indexes used by other neighboring cells are unknown, N calculated based on (1) of Embodiment #1-1 or (2) of Embodiment #1-1 may be calculated for all indexes. RB , regardless of the initial PUCCH resource set index indicated by the RMSI, and the calculated N RB The minimum N among the values RB The value may be used as the number of RBs used for PUCCH transmission.

[0254] In [Proposed Method #1], even if N is not configured for the UE individually RB In the case where the BS also implicitly provides information about the SCS and BW size of the initial BWP, the UE can calculate the N that makes the FDM resources sufficient based on the set of initial CS indices of the initial PUCCH resource set. RB .

[0255] In other words, according to [Proposed Method #1], there may be no increase in signaling complexity or overhead because there is no need to design a method for indicating N in the content of the existing specification. RB Additional signaling or consideration for indicating N RB The addition of bits

[0256] [Proposed Method #2]

[0257] Configuration and the number N of RBs to be used for PUCCH format 0 / 1 transmission will now be described. RB A method for PRB offset of an associated initial PUCCH resource set.

[0258] 1. Example #2-1

[0259] Based on the N calculated based on [Proposed Method #1] RB Or N configured / indicated by the BS through a higher layer signal (e.g., RRC signaling) such as a system information block (SIB) RB , by scaling the existing PRB offset by N RB to determine the PRB offset to be used in the band above 52.6 GHz.

[0260] 2. Example #2-2

[0261] Based on the N calculated based on [Proposed Method #1] RB Or N configured / indicated by the BS through a higher layer signal such as SIB (e.g., RRC signaling) RB , by scaling the existing PRB offset by k*N RB to determine the PRB offset to be used in the band above 52.6 GHz.

[0262] Here, k may be a value predefined in the specification or may be configured / indicated by the BS, and 0 <k<1。

[0263] As shown in [Table 8], the purpose of introducing PRB offset for the first time in Release 15 is FDM coexistence between cells for initial PUCCH transmission. For the same reason, if the number of RBs used for PUCCH transmission in the band above 52.6 GHz is configured / calculated as N as in [Proposed Method #1] RB , or if the number of RBs used for PUCCH transmission is indicated by RRC signaling, it may even be necessary to enhance the PRB offset.

[0264] Indexes 1 and 2 of [Table 8] consider FDM between two cells, and indexes 4, 5, 6, 8, 9, 10, 12, 13 and 14 consider FDM between three cells. In [Table 8], indexes 0, 3, 7 and 11 consider extreme channel delay scenarios such as cell edge UEs, and index 15 considers special cell deployment scenarios.

[0265] In particular, in indexes 1 and 2 of [Table 8], since three PRBs are allocated for one PUCCH resource set, two cells can be multiplexed by FDM using PRB offset = 3. In indexes 4, 5, 6, 8, 9, 10, 12, 13, and 14 of [Table 8], since two PRBs are allocated for one PUCCH resource set, three cells can be multiplexed by FDM using PRB offset = 2 or 4.

[0266] Because the PUCCH format 0 / 1 of the legacy Release 15 has been designed by targeting full FDM between two or three cells when transmitting through one PRB [Table 8], if the number of RBs to be used for PUCCH transmission in the 52.6 GHz band is increased, it is necessary to amplify the current PRB offset of 2 / 3 / 4 intervals by N as in Example #2-1. RB .

[0267] For example, if the SCS of the initial BWP is configured as 120 kHz, the BW size is configured as 200 MHz, and a PUCCH resource set including three elements of the “set of initial CS indices” is indicated (e.g., indices 1 and 2), then because a total of 6 FDM resources are required, based on the configuration / calculation of N RB = 22 RBs, the UE can use 6 available FDM resources in the initial BWP (i.e., a total of 6*22 PRBs). In this case, the PRB offset is simply enlarged by N RB , the PRB offset can be configured as 66 (=22*3).

[0268] Because N RB is the value calculated so that each initial PUCCH resource set is allocated 16 available resources from the perspective of one cell taking into account the BW size of the initial BWP. If each of all cells uses the same BWP as N RB Correspondingly, FDM may not be performed correctly due to inter-cell overlap.

[0269] Therefore, as in embodiment #2-2, the PRB offset can be configured to support coexistence between cells in the form of partial FDM instead of full FDM. For example, in the case of indexes 4, 5, 6, 8, 9, 10, 12, 13, 14 of [Table 8], if the PRB offset is configured to be other than 2*N RB or 4*N RB But 1*N RB or 2*N RB(i.e., k=0.5), although there are some overlapping resources between cells, the BS can give priority to using only non-overlapping resources. For invalid PUCCH resources due to resource overlap, the BS can add a start symbol or further consider the OCC index to ensure resources. In this case, invalid resources may occur due to inter-cell resource overlap.

[0270] In the legacy Release 15 and Release 16, since PUCCH format 0 / 1 is transmitted through one PRB, one PRB index for transmitting PUCCH format 0 / 1 has been determined based on the PRB offset.

[0271] In contrast, since one or more PRBs are required for PUCCH format 0 / 1 in bands higher than 52.6 GHz, the PRB offset scaled according to [Proposed Method #2] may be used to determine the PRB with the lowest index (or the PRB with the highest index) among the one or more PRBs.

[0272] In other words, among one or more PRBs for PUCCH format 0 / 1 in a band higher than 52.6 GHz, the lowest indexed PRB (or the highest indexed PRB) may be based on the N RB The scaled PRB offset is determined and can be allocated for PUCCH format 0 / 1 with N from the corresponding PRB RB The same number of consecutive (or non-consecutive) PRBs.

[0273] According to [Proposed Method #2], even when multiple PRBs are used for PUCCH format 0 / 1 transmission in a band higher than 52.6 GHz, overlap of PRBs between different cells by FDM can be minimized using a scaled PRB offset and efficient FDM between cells can be performed.

[0274] As described above, the PUCCH format 0 / 1 / 4 of Release 15 is a PUCCH format transmitted through one RB. However, in order to ensure sufficient reliability in the high-frequency unlicensed band above 52 GHz, transmission of PUCCH format 0 / 1 / 4 (hereinafter, enhanced PUCCH format 0 / 1 / 4) using one or more RBs may be considered within the maximum PSD limit and maximum output power limit allowed in the regulations.

[0275] The number of RBs required to achieve the specified maximum allowed output power and maximum PSD may be different for each SCS. In some cases, even if the maximum allowed output power is not fully used, it may be necessary to use fewer RBs to transmit PUCCH when considering the total number of available RBs in the BWP and multiplexing and scheduling with other signals / channels. Therefore, in the following, it is proposed to configure a maximum N for each SCS in proportion to the SCS. RB Values ​​and allowed N RB Value method.

[0276] [Proposed Method #3]

[0277] The number N of RBs configured for enhanced formats 0 / 1 / 4 using a plurality of RBs will now be described. RB method.

[0278] 1. Example #3-1

[0279] Based on the maximum N determined based on a specific SCS and specific criteria (e.g., maximum output power) among the SCSs supported in the B52 band (i.e., the band above 52.6 GHz) RB value, the maximum N of other SCS RB Values ​​can be configured as ratios or multiples.

[0280] 2. Example #3-2

[0281] Minimum N defined for each SCS RB and maximum N RB The allowed value between N RB The value can also be configured as a ratio or multiple of SCS. Here, the minimum N RB Value may mean a positive integer greater than or equal to 1.

[0282] Hereinafter, [Proposed Method #3] will be described in detail.

[0283] Taking ETSI EN 302 567 as an example, which is a regulatory document for the 60 GHz band in Europe, the maximum PSD of the SCS that may be supported in the B52 band (i.e., the band above 52.6 GHz) is 23 dBm / MHz, and the minimum number of PRBs to achieve the maximum output power (e.g., 40 dBm) can be listed in [Table 18]. The minimum number of PRBs in [Table 18] is calculated based on the European band 75 (c1) requirements.

[0284] In order to increase the coverage and reliability of PUCCH, it is advantageous to transmit PUCCH using the maximum output power allowed by regulations. Therefore, the BS can configure / indicate the number of RBs for each SCS of [Table 18] as N RBHowever, in a particular active BWP size, because the number of available RBs in the BWP may be limited, the number of RBs that may be transmitted at a power lower than the maximum output power may be configured / indicated as N only. RB .

[0285] [Table 18]

[0286] SCS(kHz) Minimum # of PRBs 120 35 480 9 960 5

[0287] In [Table 18], the maximum N used to achieve the maximum output power (e.g., 40 dBm) for each SCS is RB The value may have no correlation with the SCS. In addition, within the minimum N defined for the respective SCS RB Positive integers are allowed between the values ​​of N RB The value may not be related to SCS. However, because the number of PRBs used for PUCCH format 4 (PF4) should be configured to always satisfy a multiple of 2, 3, or 5 (e.g., DFT constraint → can be 2 a ×3 b ×5 c A number expressed in the form of , where a, b, and c are positive integers), for each SCS maximum N RB Values ​​and allowed N RB The values ​​may be configured / indicated to have a specific relationship. If the maximum N for each SCS RB Value and allowed N RB If there is a ratio or multiple relationship between the values, you can only configure / indicate the maximum N for a specific SCS value. RB Value and allowed N RB value, and the value for the remaining SCS can be calculated by the UE using a proportional or multiple relationship.

[0288] As an example of embodiment #3-1, if the maximum N based on the maximum output power in the SCS (u=3) of 120kHz RB The value is 32, then N in the 480kHz (u=5) SCS and the 960kHz (u=6) SCS RB The values ​​may be configured / indicated as 32 / 4=8 and 32 / 8=4, respectively. Alternatively, if the maximum N based on the maximum output power in the SCS of 960 kHz RB If the value is 5, the maximum N in the 120kHz SCS RB value and the maximum N in the 480kHz SCS RB The values ​​may be configured / indicated as a ratio or multiple relationship with each SCS, such as 5x8=40 and 5x2=10. The BS may configure only the maximum N of the reference SCSs. RBvalue, and the ratio or multiple relationship can be used to calculate the N of the remaining SCS RB value.

[0289] As an example of embodiment #3-2, if the minimum and maximum N in the SCS of 960kHz RB The allowed value between N RB The values ​​are configured / indicated as {1,a,b,...,z}, and the allowed N for a 120kHz SCS is RB The value can be configured / indicated as {1,8a,8b,...,8z}, and the allowed N in the SCS of 480kHz RB The value can be configured / indicated as {1,2a,2b,...,2z}. Thus, the minimum N for each SCS is RB Value and maximum N RB Allowable values ​​between values ​​may also be configured / indicated as ratios or multiples of the SCS.

[0290] According to [Proposed Method #3], since there is no separate configuration of minimum and maximum N for each SCS RB In the case of the value, the BS only needs to configure the minimum and maximum N for one SCS for the UE. RB value, the same number of configurations can always be supported, regardless of the number of SCSs supported. In other words, because the BS only needs to indicate / configure the minimum and maximum N RB For example, when four SCSs can be used in a communication environment supported by the BS and two SCSs are actually used in a communication environment of the UE, the minimum and maximum N values ​​for the four SCSs are not configured. RB In the absence of information about the value, the BS only needs to indicate / configure the minimum and maximum N for one SCS. RB value. Therefore, unnecessary configuration can be reduced. In addition, because the UE only needs to directly calculate as many SCSs as the number of SCSs that the UE may actually use, the complexity may not increase significantly.

[0291] [Proposed Method #4]

[0292] A method will now be described in which, when there is no N configured by the BS for the UE, RB When the value is set, the UE calculates / configures N for initial PUCCH resource (e.g., PUCCH format 0 / 1) transmission through [Equation 3] according to the PUCCH resource set index indicated taking into account the initial BWP size (e.g., the number of available RBs in the BW of the BWP) and the PRB offset for inter-cell FDM. RB .

[0293] [Equation 3]

[0294]

[0295] in, The maximum N defined for each SCS can be expressed as [Proposed Method #3] RB The value is taken as the number of RBs that meet the PSD and maximum output power requirements of each SCS.

[0296] In addition, M can represent the number of available RBs in the BWP, and O can represent the number of FDM resources required for each PUCCH resource hopping in the cell calculated by the number of indices in the set of initial CS indices (for example, the size of the PRB offset between cells through FDM multiplexing).

[0297] In addition, F represents the number of cells multiplexed by FDM, and the constant 2 reflects frequency hopping. The PRB offset for each PUCCH resource set index may be defined as N calculated according to [Equation 3] RB multiples of N, and N calculated based on a specific PUCCH resource set index RB can be applied to other PUCCH resource sets, so that the same N RB The value can be configured to be used.

[0298] Here, N for the initial PUCCH resource calculated and configured by [Equation 3] RB The value can be applied only to unlicensed bands. In case of licensed bands, the proposed method can be applied

[0299] Whether the corresponding cell is a cell operating in the licensed band or a cell operating in the unlicensed band may be indicated through SIB1 or PBCH. For example, the UE may identify whether the corresponding cell is a cell operating in the licensed band or a cell operating in the unlicensed band according to a 1-bit flag included in SIB1 or PBCH.

[0300] The BS may indicate / configure the N of PUCCH format 0 / 1 (PF0 / 1) to be sent through the initial PUCCH resource to / for the UE through a higher layer signal such as the RACH configuration parameter in SIB1 (or RMSI). RB Otherwise, the UE can calculate / configure the N of the initial PUCCH resource based on the PUCCH resource index indicated by SIB1 (or RMSI) and the BW size and SCS of the initial BWP using [Equation 3] RB .

[0301] For example, referring to [Table 8] and [Table 17], when the SCS and BW sizes of the initial BWP are 120 kHz and 200 MHz, respectively (the number of available RBs, M=132), index 1 or index 2 of [Table 8] is indicated by SIB1 (or RMSI), because the set of initial CS indexes includes 3 elements, the number of resources required for each hop FDM is O=3 (i.e., the size of the PRB offset is 3) and index 1 or index 2 targets FDM between 2 cells. Therefore, if F=2 is substituted into the equation, N can be calculated. RB,120 =floor{132 / (3x2x2)}=11. If the SCS of the initial BWP is 480kHz and the BW size is 400MHz (M=66), then N can be calculated. RB,480 =floor{66 / (3x2x2)}=5.

[0302] As another example, when the SCS and BW sizes of the initial BWP are 120 kHz and 200 MHz, respectively (the number of available RBs, M=132), and one of indexes 4 / 5 / 6, 8 / 9 / 10, and 12 / 13 / 14 of [Table 8] is represented by SIB1 (or RMSI), since the set of initial CS indexes includes 4 indexes, the number of resources required for each hop FDM is O=2 (i.e., the size of the PRB offset is 2) and the corresponding index targets FDM between 3 cells. Therefore, if F=3 is substituted into the equation, N can be calculated. RB,120 =floor{132 / (3x2x2)}=11.

[0303] Meanwhile, without considering the index 0 / 3 / 7 / 11 of [Table 8] and the FDM between cells, N can be calculated based on the total initial BWP. RB For example, in the case of a BWP with an SCS of 120 kHz, since the set of initial CS indices includes 2 elements, the number of resources required for each FDM hop is O=4. And the corresponding index targets FDM between 3 cells. Therefore, if F=1 corresponding to the number of FDM cells is substituted into the equation, N can be calculated. RB,120 =floor{132 / (4x1x2)}=22.

[0304] However, the N of PUCCH resource set index 0 / 3 / 7 / 11 calculated according to the above method is RB May be different from N of other PUCCH resource set indexes 1 / 2 / 4 / 5 / 6 RB , and can reduce the frequency diversity effect of the PUCCH near the center of the BWP (i.e., the PUCCH mapped to the inside of the BWP). Therefore, N calculated based on index 1 / 2 / 4 / 5 / 6 RBThe value can even be applied to N with index 0 / 3 / 7 / 11 RB value.

[0305] Index 15 is used for special cell deployment. Therefore, since the PUCCH resources are mapped based on the PRB offset corresponding to 1 / 4 of the BWP size, it is assumed that only half of the RBs in the total BWP are substantially available RBs to map the PUCCH resources. Therefore, taking the BWP of the SCS of 120kHz as an example, since the set of CS indices includes 4 indices, if the number of resources required per hop FDM, i.e., O=2, and the number of cells multiplexed by FDM, i.e., F=1, are substituted, N can be calculated. RB,120 =floor{66 / (2x1x2)}=16.

[0306] Typically, if equation [3] is used to determine N to support full FDM between 2 or 3 cells, RB (ie, 16 PUCCH resources for each PUCCH resource set are mapped without overlap). RB A value smaller than the number of RBs when the UE performs transmission at the maximum output power for each SCS may cause problems in terms of PUCCH coverage or reliability. Therefore, a specific minimum N may be configured. RB value, and the actual N RB The value can be multiplied by the minimum N using a specific multiple RB Then, even when partial or full overlap occurs between PUCCH resources, PUCCH can be sent with higher power.

[0307] Specifically, N is determined considering full FDM. RB can be determined as the minimum N RB value, and the actual N RB The value can be configured as a minimum N RB In this case, in [Table 8], if the PRB offset of a specific PUCCH resource set is K and the actual N RB The value is configured as the minimum N RB The actual PRB offset can be determined as {K xN RB} or {K x minimum N RB Then, the power consumption of the UE can be reduced while supporting full FDM in which all resources do not overlap between cells.

[0308] If the actual N RB The value is configured as the minimum N RB The actual PRB offset can be determined as {K / 2xN RB} or {K x minimum N RB}. In this case, PUCCH resources supporting partial FDM where some resources overlap between cells may be configured. In this case, the power consumption of the UE may increase slightly.

[0309] The above two FDM structures are methods for applying FDM between three cells. RB The 3 resources with the value of 6 will be distributed to the PUCCH resource set indexes 1 and 2 of the two cells. RB The value is configured as the minimum N RB When the value is twice, the number of FDM resources in the BWP can be 3 and can be configured to fully overlap.

[0310] [Proposed Method #5]

[0311] When the BS configures initial PUCCH resources to be used in the initial access procedure of the UE, a method of configuring multiple PUCCH resources with different numbers of RBs as one set and a method of selecting the initial PUCCH resources to be used for PUCCH transmission in consideration of characteristics of the UE will now be described.

[0312] Example #5-1

[0313] Taking into account the power class of the UE, the UE or BS may select / indicate a PUCCH resource having a relatively large number of RBs in a PUCCH resource set including multiple PUCCH resources having different numbers of RBs for / to a UE having a power class allowing high power / effective isotropic radiated power (EIRP).

[0314] 2. Example #5-2

[0315] If the BS configuration includes N RBs having the same number (ie, N RB =N) and the UE or BS may select / instruct RBs for / to a UE with a power class that allows high power / EIRP to use all N RBs to send PUCCH. For a UE with a power class that does not allow high power / EIRP, the UE or BS may select / instruct RBs to use only K (N>K) RBs to send PUCCH, which is a portion of the N RBs in each PUCCH resource.

[0316] As a method for the UE or BS to preselect / indicate K RBs among N RBs, the UE or BS may select K RBs in advance among the configured N RBs. RB =N,

[0317] - select / indicate K consecutive RBs from the lowest frequency RB in the high frequency direction,

[0318] - select / indicate K consecutive RBs from the highest frequency RB in the low frequency direction,

[0319] - Match the center of N RBs with the center of K RBs, or

[0320] - Determine an RB corresponding to the offset as a start RB by indicating an offset from a specific RB (lowest / highest / center RB), and select / indicate K RBs from the start RB in a high frequency direction or a low frequency direction.

[0321] Here, embodiment #5-2 can be applied only when the BS can distinguish the power class of the UE. The K value can be configured / indicated or defined separately in the specification. The ratio of K to N (e.g., 0.5) can be defined / configured.

[0322] 3. Example #5-3

[0323] When it is difficult for the BS to distinguish the power level of the UE, the BS can independently configure the PUCCH resource set according to the maximum power (for each maximum transmit power) through which the UE can perform transmission. The information used to configure the PUCCH resource set may include the number of RBs, RB positions, PUCCH formats, and PUCCH duration.

[0324] Example #5-4

[0325] The UE or the BS may select / indicate a PUCCH resource having a relatively large number of RBs to a UE located at a cell edge by estimating the location of the UE in one cell, compared to a UE located at a cell center.

[0326] (1) According to the DL reception strength when sending the initial PUCCH, the UE can select a PUCCH resource from the pre-configured PUCCH resource set.

[0327] (2) The BS may indicate one PUCCH resource within a preconfigured PUCCH resource set according to the reception strength of the UE's UL signal / channel received through the RACH process, msgB / msg2, or msg4. In this case, the DL signal corresponding to the RACH process, msgB / msg2, or msg4 may be a DCI for scheduling each of the RACH process, msgB / msg2, or msg4, or may be a message including msgB / msg2 or msg4.

[0328] Here, N for each initial PUCCH resource can be determined by applying the above [Proposed Method #4] RB .

[0329] In the following, [Proposed Method #5] will be described in detail.

[0330] Now, a method of configuring multiple PUCCH resources having different numbers of RBs as one PUCCH resource set will be described. For example, when the BS configures the initial PUCCH resources to be used in the initial access procedure of the UE, the BS may pre-configure two resources, namely, "PR1", which is a PUCCH resource where N RB = RB1, and "PR2", which is a PUCCH resource where N RB = RB2 (where RB1 < RB2), as one PUCCH resource set.

[0331] When the UE transmits the initial PUCCH based on the configured PUCCH resources, the PUCCH resource to be used may be indicated to the UE considering the characteristics of the UE, or the UE may directly select the initial PUCCH resource. For example, the power level of the UE may be considered. For example, in the case of a UE having a power level that allows high power / EIRP, it is advantageous in terms of reliability and coverage to use a PUCCH resource having a relatively large number of RBs among the configured PUCCH resources to transmit the PUCCH.

[0332] Another method is to select / indicate the PUCCH resource according to the relative position of the UE on the cell. For example, since a UE located at the cell edge is relatively far from the BS, it is advantageous in terms of reliability and coverage to use a PUCCH resource among the configured PUCCH resources that is allocated more RBs to transmit the PUCCH. Here, the position of the UE on the cell may be estimated by the UE through the DL reception strength of the UE. Alternatively, the BS may estimate the position of the UE through the reception strength of UL signals / channels such as PRACH or msgA transmitted by the UE during the RACH procedure. In this case, the BS may indicate through DCI or each message used for scheduling msgB / msg2 or msg4 which PUCCH resource with which N RB value will be used.

[0333] Therefore, in the above example, when the BS pre-configures the PUCCH resources "PR1" (N RB = RB1) and the PUCCH resource "PR2" (N RB = RB2) (where RB1 < RB2) with different N RB values, a UE having a power level that allows high power / EIRP may transmit the PUCCH by selecting PR2 having more RBs among the two PUCCH resources.

[0334] As another method, when the BS configures a PUCCH resource set including a plurality of PUCCH resources having the same number of RBs (i.e., N RBs), the UE or BS may select / indicate RBs so that a UE having a power class allowing high power / EIRP may use all the N RBs. Alternatively, the UE or BS may select / indicate RBs so that a UE having a power class allowing little power transmission may transmit a PUCCH using only K (N>K) RBs as a part of the N RBs in each PUCCH resource.

[0335] As a method of selecting K RBs from N RBs configured by the BS, the UE may select K consecutive RBs in the high frequency direction from the lowest frequency RB among the N configured RBs. Alternatively, the UE may select K consecutive RBs in the low frequency direction from the highest frequency RB. Alternatively, the positions of K RBs in N RBs may be configured / indicated by matching the center RB of N RBs with the center RB of K RBs. In addition, if the BS indicates an offset from a specific RB (lowest / highest / center RB), the UE may determine the RB corresponding to the offset as the starting RB. In addition, the UE may use K RBs in the high frequency direction or the low frequency direction from the determined starting RB. Alternatively, the UE may be instructed to use K RBs in the high frequency direction or the low frequency direction from the determined starting RB.

[0336] Here, embodiment #5-2 can be applied only when the BS can distinguish the power level of the UE. In addition, the K value can be configured / indicated or defined separately in the specification. The ratio of K to N (e.g., 0.5) can be defined / configured.

[0337] If the BS fails to identify the power class of the UE, the PUCCH resource set may be independently configured according to the maximum power (for each maximum transmission power) by which the UE can perform transmission. Information for configuring the PUCCH resource set may include the number of RBs, the location of RBs, the PUCCH format, and the PUCCH duration.

[0338] When there are UE A relatively close to the BS and UE B relatively far from the BS, one of the PUCCH resources in the configured PUCCH resource set may be selected / indicated as follows.

[0339] For initial PUCCH transmission, the UE may select a PUCCH resource in the PUCCH resource set preconfigured for the UE according to the DL reception sensitivity. For example, because UE A is located at a closer distance to the BS, the DL reception strength is likely to be greater than a specific value, and because UE B is located at a farther distance from the BS, the DL reception strength is likely to be lower than a specific value.

[0340] Therefore, UE A may select PR1 and UE B may select PR2 to transmit the PUCCH. Here, the specific threshold for determining whether the DL reception strength is high or low may be a value preconfigured / indicated by the BS or defined in the specification. Alternatively, the BS may indicate one PUCCH resource in the preconfigured PUCCH resource set to the UE according to the reception sensitivity of the UE's UL signal / channel (e.g., PRACH or msgA) received by the BS in the RACH process.

[0341] According to [Proposed Method #5], a PUCCH resource with an appropriate number of RBs that can guarantee coverage and reliability of the PUCCH according to the power class of the UE and / or the location of the UE may be selected / indicated.

[0342] [Proposed Method #6]

[0343] Configuration / indication of an initial PUCCH resource set used before dedicated PUCCH resources are configured for a UE and the number N of RBs constituting the PUCCH resources in the PUCCH resource set will be described. RB method.

[0344] Example #6-1

[0345] For each PUCCH resource set, the initial CS index (hereinafter referred to as N) of each initial PUCCH resource set may be CS ) and whether to configure RB offset X to configure N differently RB .

[0346] (1) When the BS configures / indicates N through SIB RB = K and no RB offset X is configured, all PUCCH resources in the initial PUCCH resource set may be configured as K RBs for transmission. In this case, the PRB offset value for FDM between cells may be scaled to a multiple of K. For example, the PRB offset of each initial PUCCH resource set defined in [Table 8] may be calculated based on N CS Scaled to K / 2K / 3K times.

[0347] (2) When the BS configures / indicates N through SIB RB = K and RB offset X is also configured / indicated, the PUCCH resource may be indexed according to the PUCCH resource index (hereinafter, PUCCH ) and N CS The value is configured as described in the following example. In this case, the PRB offset value for FDM between cells can be scaled to a multiple of K. For example, the PRB offset for each initial PUCCH resource set defined in [Table 8] can be calculated based on N CSScaled to K / 2K / 3K times.

[0348] A) When N CS =2,

[0349] - If r PUCCH 0 / 1 or 8 / 9: PUCCH resources are configured as 1)N RB =K+2*X,2)N RB =K-2*X,3)N RB =K+X, or 4)N RB =KX,

[0350] - If r PUCCH 2 / 3 or 10 / 11: PUCCH resources are configured as 1)N RB =K+X,2)N RB =KX,3)N RB =K+2*X, or 4)N RB =K-2*X,

[0351] - If r PUCCH 4 / 5 or 12 / 13: PUCCH resources are configured as 1)N RB =KX,2)N RB =K+X,3)N RB = K-2*X, or 4)N RB =K+2*X,

[0352] - If r PUCCH 6 / 7 or 14 / 15: PUCCH resources are configured as 1)N RB =K-2*X,2)N RB =K+2*X,3)N RB =KX, or 4)N RB =K+X.

[0353] B) When N CS =3,

[0354] - If r PUCCH 0 / 1 / 2 or 8 / 9 / 10: PUCCH resources are configured as 1)N RB =K+X or 2)N RB =KX,

[0355] - If r PUCCH 3 / 4 / 5 or 11 / 12 / 13: PUCCH resources are configured as N RB =K,

[0356] - If r PUCCH 6 / 7 or 14 / 15: PUCCH resources are configured as 1)N RB=KX or 2)N RB =K+X.

[0357] C) When N CS =4,

[0358] - If r PUCCH 0 / 1 / 2 / 3 or 8 / 9 / 10 / 11: PUCCH resources are configured as N RB =K+X or 2)N RB =KX,

[0359] - If r PUCCH 4 / 5 / 6 / 7 or 12 / 13 / 14 / 15: PUCCH resources are configured as N RB =KX or 2)N RB =K+X.

[0360] Example #6-2

[0361] For each PUCCH resource set, RBs used to send a PUCCH (hereinafter referred to as “N RB ”) may be identically fixed to K, and the 16 PUCCH resources in each PUCCH resource set may be equally divided into K as much as possible. Here, only the positive integer value that is a factor of 16 may be allowed to be N of each PUCCH resource set. CS The value of multiples of is taken as the K value. In addition, K and N determined by K RB It may be defined in the specification as a value or equation, or may be configured / indicated by the BS.

[0362] (1) For example, it is described that K=2 and N RB The types are X and Y cases.

[0363] A) When N CS =2 or N CS =4,

[0364] - If r PUCCH 0 / 1 / 2 / 3 / 4 / 5 / 6 / 7: PUCCH resources are configured as N RB =X,

[0365] - If r PUCCH Yes 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15: PUCCH resources are configured as N RB =Y.

[0366] B) When N CS =3,

[0367] - If r PUCCH 0 / 1 / 2 / 3 / 4 / 5: PUCCH resources are configured as NRB =X,

[0368] - If r PUCCH Yes 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15: PUCCH resources are configured as N RB =Y.

[0369] (2) FDM PUCCH resources having different numbers of RBs may be configured in each of the high frequency region and the low frequency region.

[0370] A) When N CS =2 or N CS =4,

[0371] -(r PUCCH mod8) is 0 / 1 / 2 / 3, the number of RBs of 8 PUCCH resources is configured as N RB =X, and the number of RBs of the remaining 8 PUCCH resources is configured as N RB =Y.

[0372] B) When N CS =3 o'clock

[0373] -(r PUCCH mod8) is 0 / 1 / 2, the number of RBs of the 6 PUCCH resources is configured as N RB =X, and the number of RBs of the remaining 10 PUCCH resources is configured as N RB =Y, and

[0374] -(r PUCCH The number of RBs of the 12 PUCCH resources with mod8) of 0 / 1 / 2 / 3 / 4 / 5 is configured as N RB =X, and the number of RBs of the remaining 4 PUCCH resources is configured as N RB =Y.

[0375] 3. Example #6-3

[0376] When the BS configures N RB When the value is , the step size for each PUCCH resource set can be configured as In addition, N for each PUCCH resource RB The value can be configured based on the Δ value according to the FDM resources required for each PUCCH resource set as follows. In this case, the BS can RB The step size Δ is configured / indicated together, or the step size for each PUCCH resource set may be predefined in the specification.

[0377] (1) By selecting the maximum N RBThe number of RBs of each hop PUCCH resource is configured by reducing or increasing the number of RBs in a step order. RB The PUCCH resource of the value may be located at the lowest frequency or the highest frequency in each hop.

[0378] For example, for a RB =12 and N CS = 2 and Δ = 2 PUCCH resource set, when r PUCCH When it is 0 / 1 or 8 / 9, N RB =12; when r PUCCH When it is 2 / 3 or 10 / 11, and N RB =12-2=10; when r PUCCH When it is 4 / 5 or 12 / 13, N RB =10-2=8; and when r PUCCH When it is 6 / 7 or 14 / 15, N RB =8-2=6.

[0379] (2) The number of RBs of each PUCCH resource hop can be configured so that half of the number of resources required for FDM in each PUCCH resource set is configured as RB The resources with the step size are reduced successively and the other half is configured as where the number of RBs is based on N RB The resources are sequentially increased in steps. For example, with a maximum of N RB The PUCCH resource of the value may be located at the lowest frequency or the highest frequency in each hop.

[0380] For example, if for N RB =12 and N CS =2, Δ = 2, when r PUCCH When N is 0 / 1, RB =12-2=10; when r PUCCH When N is 2 / 3, RB =10-2=8; when r PUCCH When N is 4 / 5, RB =8-2=6; and when r PUCCH When it is 6 / 7, N RB =6-2=4. When r PUCCH N for 8 / 9 RB =12+2=14, and when r PUCCH When it is 10 / 11, N RB =14+2=16. In addition, when r PUCCH When it is 12 / 13, N RB =16+2=18, and when r PUCCH When it is 14 / 15, NRB =18+2=20.

[0381] Here, in [Proposed Method #6], when the BS does not separately configure / indicate N for PUCCH transmission RB When N RB = 1 to transmit the PUCCH. In addition, the total number of RBs required for each PUCCH resource set may be calculated based on the sum of the numbers of RBs constituting the respective PUCCH resources included in the PUCCH resource set and applied as a PRB offset value.

[0382] Hereinafter, [Proposed Method #6] will be described in detail.

[0383] In case the UE is in a connected state after radio resource control (RRC) configuration, the BS can configure PUCCH resources with an appropriate number of RBs for each UE when configuring dedicated PUCCH resources because of the BS's ability to discern UEs such as power classes of UEs.

[0384] However, before configuring dedicated PUCCH resources, as in the case where the UE is performing an initial access procedure, the BS may not be able to discern the capabilities of the UE, such as the power class of the UE or the location of the UE on the cell.

[0385] However, if the number of RBs of the PUCCH resources included in the initial PUCCH resource set is configured differently and if the situation of the UE (e.g., the power class of the UE and / or the location of the UE on the cell) can be inferred even before the RRC connection, the coverage and PUCCH transmission success rate can be increased by configuring / indicating PUCCH resources with an appropriate number of RBs based on the inferred situation.

[0386] For example, as a method for the BS to select a PUCCH resource with an appropriate number of RBs for the UE, the situation of the UE such as the power level and / or location of the UE can be inferred based on direct information included in msg1 / msg3 (in the case of 4-step RACH) or msgA (in the case of 2-step RACH) exchanged during the initial access procedure between the UE and the BS or based on the reception sensitivity of the signal / channel received by the BS from the UE.

[0387] Even when the UE is performing the RACH procedure, if the BS recognizes the situation of the UE in advance, the BS can indicate a PUCCH resource having a specific number of RBs in the initial PUCCH resource set by scheduling a UL grant of msg4.

[0388] To this end, a first method is to configure all N equally or differently for respective PUCCH resources in a PUCCH resource set according to whether X as an RB offset is configured. RB If the BS only configures N RB = K, then all PUCCH resources in a PUCCH resource set are configured with the same number of K RBs. In this case, according to N for each PUCCH resource set CS Value, for each PUCCH resource set, the number of resources required for FDM may be different.

[0389] Therefore, regardless of whether a PRB offset is configured, the total number of PRBs of PUCCH resources to be subjected to FDM remains the same as N configured by the BS. RB The same, and the PUCCH resource groups in the PUCCH resource set can be configured with different numbers of PRBs. Here, each PUCCH resource set can have a number of PRBs for CS The corresponding N RB For example, since there are N CS = 2 requires a total of 8 FDM resources, so if the PRB offset is not configured, a total of K*8 PRBs are required.

[0390] Therefore, even when PRB offset X is configured, the respective PUCCH resource groups according to the PUCCH resource index have a different number of RBs than K+2*X / K+X / KX / K-2*X, but the total number of RBs included in the PUCCH resource set needs to be K*8, which is the same as the RBs when PRB offset X is not configured.

[0391] In (2) of Example #6-1, when the PUCCH resource index r PUCCH When r is 0 / 1 or 8 / 9, the PUCCH resource is configured to have the maximum number of RBs. Conversely, this situation can be mirrored so that when r PUCCH When the value is 6 / 7 or 14 / 15, the PUCCH resource is configured to have the maximum number of RBs. In other words, (2) of embodiment #6-1 has the following advantages: when only K and X are configured / indicated, each PUCCH resource included in the initial PUCCH resource set can be configured to have a different number of RBs. In addition, the BS can configure appropriate K and X in consideration of the size of the initial BWP and the number of available RBs.

[0392] The second method is to divide the 16 PUCCH resources included in the PUCCH resource set into K equal parts and configure the resources to have the same number of PRBs in each divided group. That is, K can be N PUCCH resources included in the PUCCH resource set. RBHere, as K, only positive integers that are factors of 16 may be allowed, which is N per PUCCH resource set. CS In addition, K and N determined by K RB The value may be defined in the specification as a value or equation, or may be configured / indicated by the BS.

[0393] In Example #6-2, when K=2 and N RB =12, there are two types of N RB , for example, X=6 and Y=12, and N CS =2, then from 0 to r PUCCH 7's first r PUCCH The 8 PUCCH resources are configured by the number of RBs, X = 6, and from r PUCCH 8 to r PUCCH The remaining PUCCH resources of 15 can be configured by the number of RBs, Y=12.

[0394] The third method is to use N RB and a step size Δ for each PUCCH resource set to configure each PUCCH resource in a PUCCH resource set to have a different number of RBs. In this case, the step size Δ may be calculated based on the equation represented in embodiment #6-3, or may be configured / indicated in advance by the BS. Alternatively, the step size may be defined for each PUCCH resource set in the specification.

[0395] Based on the configuration N RB The value is used to sequentially reduce or increase the number of RBs by Δ to configure the number of RBs for each PUCCH resource hop. The maximum number of RBs per hop has N RB , and the number of RBs for each PUCCH resource can be determined by PUCCH N RB Decrease or increase the Δ value is configured. In this case, with maximum N RB The PUCCH resource of the value may be located at the lowest frequency or the highest frequency in each hop.

[0396] Alternatively, the number of RBs of the PUCCH resources per hop may be configured such that half of the number of resources required for FDM in each PUCCH resource set is configured as where the number of RBs is based on N RB The other half is configured as a resource with a reduced step size in sequence, where the number of RBs is based on N RB The resources are incremented in steps. RB The PUCCH resource of the value may be located at the lowest frequency or the highest frequency in each hop.

[0397] In [Proposed Method #6], when the BS does not separately configure / indicate NRBs for PUCCH transmission, the PUCCH resources may be configured with N RB =1, similar to the legacy Release 15. The total number of RBs required for each PUCCH resource set may be calculated based on the sum of the number of RBs included in the respective PUCCH resources in the PUCCH resource set and may be applied as a PRB offset.

[0398] According to [Proposed Method #6], even before configuring a dedicated PUCCH resource set for the UE, the BS can infer the UE's situation such as the UE's location based on the reception sensitivity of the UL signal received from the UE, so that the number of RBs used for PUCCH resources can be appropriately configured according to the UE's situation.

[0399] The various descriptions, functions, processes, proposals, methods and / or operational flowcharts of the present disclosure described herein may be applied to, but not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0400] More specific examples will be described below with reference to the accompanying drawings. In the following drawings / descriptions, similar reference numerals represent the same or corresponding hardware blocks, software blocks or functional blocks unless otherwise specified.

[0401] Fig.13 The diagram shows a communication system 1 applied to the present disclosure.

[0402] refer to Fig.13, the communication system 1 applied to the present disclosure includes a wireless device, a BS and a network. A wireless device is a device that performs communication using a radio access technology (RAT) (e.g., 5G NR (or new RAT) or LTE), also referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, a vehicle 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an IoT device 100f, an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing vehicle-to-vehicle (V2V) communication. Here, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television (TV), a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., laptops). Home appliances may include televisions, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, the BS and the network may be implemented as wireless devices, and a specific wireless device 200a may be used as a BS / network node for other wireless devices.

[0403] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without the intervention of the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., V2V / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0404] Wireless communication / connection 150a, 150b, and 150c may be established between wireless devices 100a to 100f / BS 200 and between BSs 200. Here, wireless communication / connection may be established through various RATs (e.g., 5G NR) such as UL / DL communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication 150c (e.g., relay or integrated access backhaul (IAB). Wireless signals may be sent and received between wireless devices, between wireless devices and BSs, and between BSs through wireless communication / connection 150a, 150b, and 150c. For example, signals may be sent and received on various physical channels through wireless communication / connection 150a, 150b, and 150c. To this end, at least a portion of various configuration information configuration processes for sending / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be performed based on various suggestions of the present disclosure.

[0405] Fig.14 The diagram illustrates a wireless device suitable for use with the present disclosure.

[0406] refer to Fig.14 , the first wireless device 100 and the second wireless device 200 can transmit wireless signals through various RATs (e.g., LTE and NR). {The first wireless device 100 and the second wireless device 200} may correspond to Fig.13 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0407] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a wireless signal including the first information / signals through the transceiver 106. The processor 102 may receive a wireless signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102 and store a plurality of pieces of information related to the operation of the processor 102. For example, the memory 104 may store software code including instructions for executing part or all of the processes controlled by the processor 102 or for executing the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document. The processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and send and / or receive wireless signals through one or more 108. Each of the transceivers 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may be a communication modem / circuit / chip.

[0408] Specifically, instructions and / or operations controlled by the processor 102 of the first wireless device 100 and stored in the memory 104 of the first wireless device 100 according to an embodiment of the present disclosure will now be described.

[0409] Although the following operations are described based on the control operations of the processor 102 in terms of the processor 102, software codes for performing such operations may be stored in the memory 104. For example, in the present disclosure, at least one memory 104 may store instructions or programs as a computer-readable storage medium. When the instructions or programs are executed, at least one processor operably connected to at least one memory may perform operations related to the following operations according to an embodiment or implementation of the present disclosure.

[0410] Specifically, the processor 102 may control the transceiver 106 to receive information about the number of RBs used for the PUCCH. Details on the type of information and / or content included in the information may be based on at least one of [Proposed Method #1] to [Proposed Method #4] or [Proposed Method #6].

[0411] The processor 102 may determine the PUCCH resource based on the number of RBs and the PRB offset. A detailed method by which the processor 102 determines the PUCCH resource may be based on at least one of [Proposed Method #2] or [Proposed Method #5].

[0412] The processor 102 may control the transceiver 106 to transmit the PUCCH through the determined PUCCH resource.

[0413] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then send a wireless signal including the third information / signals through the transceiver 206. The processor 202 may receive a wireless signal including fourth information / signals through the transceiver 106, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for executing part or all of the processes controlled by the processor 202 or for executing the descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document. The processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and send and / or receive wireless signals through one or more antennas 208. Each of the transceivers 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may be a communication modem / circuit / chip.

[0414] Specifically, instructions and / or operations controlled by the processor 102 of the second wireless device 200 and stored in the memory 104 of the second wireless device 200 according to an embodiment of the present disclosure will now be described.

[0415] Although the following operations are described based on the control operations of the processor 202 in the aspect of the processor 202, software codes for performing such operations may be stored in the memory 104. For example, in the present disclosure, at least one memory 104 may store instructions or programs as a computer-readable storage medium. When the instructions or programs are executed, at least one processor operably connected to at least one memory may perform operations related to the following operations according to an embodiment or implementation of the present disclosure.

[0416] Specifically, the processor 102 may control the transceiver 106 to transmit information related to the number of RBs used for the PUCCH. Details on the type of information and / or content included in the information may be based on at least one of [Proposed Method #1] to [Proposed Method #4] or [Proposed Method #6].

[0417] The processor 202 may control the transceiver 206 to receive the PUCCH through the PUCCH resource. A detailed method of determining the PUCCH resource may be based on at least one of [Proposed Method #2] or [Proposed Method #5].

[0418] Now, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as physical (PHY), medium access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), RRC, and service data adaptation protocol (SDAP)). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document and provide the messages, control information, data, or information to one or more transceivers 106 and 206. The one or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flow charts disclosed in this document and provide the generated signal to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from the one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flow charts disclosed in this document.

[0419] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be included in one or more processors 102 and 202, or may be stored in one or more memories 104 and executed by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or instruction sets.

[0420] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 may be configured to include read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, register, cash memory, computer-readable storage medium, and / or combinations thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0421] One or more transceivers 106 and 206 may send user data, control information, and / or wireless signals / channels mentioned in the methods and / or operational flow charts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or wireless signals / channels mentioned in the description, descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202, and send and receive wireless signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 send user data, control information, or wireless signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 can receive user data, control information, or wireless signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information, and / or wireless signals / channels mentioned in the descriptions, functions, processes, and suggestions disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received wireless signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, and wireless signals / channels using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, wireless signals / channels processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0422] Fig.15 The diagram is applied to a vehicle or an autonomous vehicle of the present disclosure. The vehicle or the autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0423] refer to Fig.15 The vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110.

[0424] The communication unit 110 may send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous driving vehicle 100. The control unit 120 may include an ECU. The drive unit 140a may enable the vehicle or autonomous driving vehicle 100 to drive on a road. The drive unit 140a may include an engine, a motor, a powertrain, wheels, brakes, a steering device, and the like. The power supply unit 140b may supply power to the vehicle or autonomous driving vehicle 100, and may include a wired / wireless charging circuit, a battery, and the like. The sensor unit 140c may acquire information about vehicle status information, surrounding environment information, user information, and the like. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illumination sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane on which the vehicle is driving, a technology for automatically adjusting a speed such as an adaptive cruise control, a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path if a destination is set, and the like.

[0425] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 may obtain the latest traffic information data from the external server irregularly / irregularly, and may obtain surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c may obtain information about vehicle state information and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and driving plan based on the newly acquired data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving route, and / or driving plan to an external server. The external server may predict traffic information data based on information collected from the vehicle or autonomous driving vehicle, using AI technology, etc., and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0426] The embodiments of the present disclosure described herein below are combinations of elements and features of the present disclosure. Unless otherwise stated, these elements or features may be considered as selective. Each element or feature may be practiced without being combined with other elements or features. In addition, the embodiments of the present disclosure may be constructed by combining a part of elements and / or features. The order of operations described in the embodiments of the present disclosure may be rearranged. Some constructions of any one embodiment may be included in another embodiment and may be replaced by the corresponding constructions of another embodiment. It will be apparent to those skilled in the art that claims that are not explicitly referenced to each other in the attached claims may be presented in combination as embodiments of the present disclosure, or may be included as new claims by subsequent amendments after the application is submitted.

[0427] In the present disclosure, in some cases, a specific operation described as being performed by a BS may be performed by an upper node of the BS. That is, it is apparent that in a network consisting of a plurality of network nodes including a BS, various operations performed for communication with an MS may be performed by the BS or network nodes other than the BS. The term "BS" may be replaced with the term "fixed station", "Node B", "enhanced Node B (eNodeB or eNB)", "access point", etc.

[0428] Those skilled in the art will appreciate that the present disclosure can be performed in other specific ways different from the ways set forth herein without departing from the spirit and essential characteristics of the present disclosure. Therefore, the above embodiments are interpreted in all respects as illustrative and not restrictive. The scope of the present disclosure should be determined by the appended claims and their legal equivalents, rather than by the above description, and all changes falling within the meaning and equivalent range of the appended claims should be included therein.

[0429] Industrial Applicability

[0430] Although the above-mentioned method of transmitting and receiving a UL control channel and the apparatus thereof have been described based on an example applied to a 5G NR system, the method and apparatus are applicable to various wireless communication systems in addition to the 5G NR system.

Claims

1. A method comprising: receiving, by a user equipment (UE), information about an index of a physical uplink control channel (PUCCH) resource set for a PUCCH and a number of resource blocks (RBs) of the PUCCH resources used for transmission of the PUCCH; as well as The UE sends the PUCCH through the PUCCH resource based on a first RB offset, Wherein, based on the index of the PUCCH resource set, a second RB offset of the PUCCH resource set is obtained, and The first RB offset is obtained by multiplying the number of RBs by the second RB offset.

2. The method according to claim 1, wherein: The PUCCH is based on PUCCH format 0 or PUCCH format 1.

3. The method according to claim 1, wherein: The information is received via a System Information Block (SIB).

4. The method according to claim 1, wherein: The PUCCH resource set is an initial PUCCH resource set used before a dedicated PUCCH resource set for the UE is configured.

5. The method according to claim 1, wherein: The PUCCH is transmitted in a frequency band above 52.6 GHz.

6. The method according to claim 1, wherein: The PUCCH is transmitted through a plurality of RBs.

7. A user equipment (UE), comprising: at least one transceiver; at least one processor; as well as at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations including: receiving, by at least one transceiver, information about an index of a physical uplink control channel (PUCCH) resource set for a PUCCH and a number of resource blocks (RBs) of PUCCH resources used for transmission of the PUCCH, and transmitting, by at least one transceiver, the PUCCH through the PUCCH resource based on a first RB offset, Wherein, based on the index of the PUCCH resource set, a second RB offset of the PUCCH resource set is obtained, and The first RB offset is obtained by multiplying the number of RBs by the second RB offset.

8. The UE according to claim 7, wherein: The PUCCH is based on PUCCH format 0 or PUCCH format 1.

9. The UE according to claim 7, wherein: The information is received via a System Information Block (SIB).

10. The UE according to claim 7, wherein: The PUCCH resource set is an initial PUCCH resource set used before a dedicated PUCCH resource set for the UE is configured.

11. The UE according to claim 7, wherein: The PUCCH is transmitted in a frequency band above 52.6 GHz.

12. The UE according to claim 7, wherein: The PUCCH is transmitted through a plurality of RBs.

13. An apparatus comprising: at least one processor; as well as at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising: receiving information about an index of a physical uplink control channel (PUCCH) resource set for a PUCCH and a number of resource blocks (RBs) of PUCCH resources used for transmission of the PUCCH, and sending the PUCCH through the PUCCH resource based on a first RB offset, Wherein, based on the index of the PUCCH resource set, a second RB offset of the PUCCH resource set is obtained, and The first RB offset is obtained by multiplying the number of RBs by the second RB offset.

14. A computer-readable storage medium comprising at least one computer program, the at least one computer program causing at least one processor to perform operations comprising: receiving information about an index of a physical uplink control channel (PUCCH) resource set for a PUCCH and a number of resource blocks (RBs) of PUCCH resources used for transmission of the PUCCH; as well as sending the PUCCH through the PUCCH resource based on a first RB offset, Wherein, based on the index of the PUCCH resource set, a second RB offset of the PUCCH resource set is obtained, and The first RB offset is obtained by multiplying the number of RBs by the second RB offset.

15. A method comprising: transmitting, by a base station (BS), information on an index of a physical uplink control channel (PUCCH) resource set for a PUCCH and the number of resource blocks (RBs) of PUCCH resources used for transmission of the PUCCH, and receiving, by the BS, the PUCCH through the PUCCH resource based on a first RB offset, The index of the PUCCH resource set is used to indicate the second RB offset of the PUCCH resource set, and The first RB offset is obtained by multiplying the number of RBs by the second RB offset.

16. A base station (BS), comprising: at least one transceiver; at least one processor; as well as at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising: transmitting, by the at least one transceiver, information related to an index of a physical uplink control channel (PUCCH) resource set for a PUCCH and a number of resource blocks (RBs) of PUCCH resources used for transmission of the PUCCH, and receiving, by the at least one transceiver, the PUCCH through the PUCCH resource based on a first RB offset, The index of the PUCCH resource set is used to indicate the second RB offset of the PUCCH resource set, and The first RB offset is obtained by multiplying the number of RBs by the second RB offset.

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