Transmission power

Abstract

One disclosure of the present disclosure provides a UE that performs communication. The UE comprises: at least one processor; and at least one memory storing instructions and operatively and electrically connectable to the at least one processor. An operation performed by at least one processor based on execution of the instruction includes the steps of: determining a transmit power; and transmitting the uplink signal based on the transmission power.

Description

Technical Field

[0001] This specification relates to radio communications. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a technology for implementing high-speed packet communications. Many schemes have been proposed for the LTE goals, including those aimed at reducing user and supplier costs, improving service quality, and expanding and improving coverage and system capacity. 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of frequency bands, simple structure, open interfaces, and sufficient power consumption of terminals as upper layer requirements.

[0003] Development of requirements and specifications for New Radio (NR) systems has begun in the International Telecommunication Union (ITU) and 3GPP. 3GPP must identify and develop technical components for successful standardization of new RATs that will meet both immediate market needs and longer-term requirements set forth by the ITU Radiocommunication Sector (ITU-R) International Mobile Telecommunications (IMT)-2020 process in a timely manner. In addition, NR should be able to use any spectrum band in the range of at least up to 100 GHz that can be used for wireless communications even in the more distant future.

[0004] The goal of NR is a single technology framework that addresses all use cases, requirements and deployment scenarios, including enhanced mobile broadband (eMBB), massive machine type communications (mMTC), ultra-reliable and low latency communications (URLLC), etc. NR should be inherently forward compatible.

[0005] According to the conventional technology, there is a problem in that a 29 dBm high power terminal is not supported in a single carrier of FR2 (Frequency Range 2). Summary of the invention

[0006] Technical Solution

[0007] In one aspect, a UE is provided. The UE includes: at least one transceiver; at least one processor; and at least one memory, the at least one memory storing instructions and being electrically connected to the at least one processor in operation. The operations performed by the at least one processor based on the command may include: determining a transmit power; and transmitting an uplink signal based on the transmit power.

[0008] In another aspect, a method performed by a UE is provided.

[0009] In one aspect, a UE is provided. The UE includes: at least one transceiver; at least one processor; and at least one memory, the at least one memory storing instructions and being electrically connected to the at least one processor in operation. The operations performed by the at least one processor based on the command may include: determining a transmit power for a PRACH; and transmitting a PRACH signal including a random access preamble based on the transmit power.

[0010] In another aspect, a method for execution by a device is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0012] Figure 2 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0013] Figure 3 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0014] Figure 4 An example of a radio frame structure of NR to which an implementation of the present disclosure is applied is shown.

[0015] Figure 5 An example of a time slot structure of an NR frame to which an implementation of the present disclosure is applied is shown.

[0016] Figure 6 An example of a 1Tx terminal according to an embodiment of the present specification is illustrated.

[0017] Figures 7a to 7c An example of a 2Tx terminal supporting UL-MIMO according to an embodiment of this specification is illustrated.

[0018] Figure 8 An example of a 2Tx terminal supporting Tx diversity according to an embodiment of this specification is illustrated.

[0019] Fig. 9 An example of a precoding matrix for single-layer transmission using two antenna ports according to an embodiment of the present specification is shown.

[0020] Fig.10 An example of a precoding matrix for two-layer transmission using two antenna ports according to an embodiment of the present specification is shown.

[0021] Figures 11a to 11c An example of a structure for transmitting a 4Tx terminal according to an embodiment of the present specification is illustrated.

[0022] Fig.12 An example of a precoding matrix for layer 1 transmission using four antenna ports according to an embodiment of the present specification is shown.

[0023] Fig.13 An example of a precoding matrix for two-layer transmission using four antenna ports according to an embodiment of the present specification is shown.

[0024] Fig.14 An example of a precoding matrix for 3-layer transmission using four antenna ports according to an embodiment of the present specification is shown.

[0025] Fig.15 An example of a precoding matrix for 4-layer transmission using four antenna ports according to an embodiment of the present specification is shown.

[0026] Fig.16 is an example of reverse IMD for 2Tx according to an embodiment of the present specification.

[0027] Fig.17 is an example of a PSD used to derive an MSD value according to an embodiment of the present specification.

[0028] Fig.18 An example of a structure for transmitting a 4Tx terminal according to an embodiment of the present specification is illustrated.

[0029] Figures 19a to 19g is an example of using TPMI in 4Tx1 layer UL-MIMO in Case 1 according to an embodiment of the present disclosure.

[0030] Figures 20a to 20h is an example of using TPMI in 4Tx1 layer UL-MIMO in Case 2 according to an embodiment of the present disclosure.

[0031] Figures 21a to 21g is an example of using TPMI in 4Tx1 layer UL-MIMO in Case 3 according to an embodiment of the present disclosure.

[0032] Fig. 22 An example of operation according to an embodiment of the present specification is illustrated. DETAILED DESCRIPTION

[0033] The following techniques, devices and systems can be applied to various wireless multiple access systems. Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and multi-carrier frequency division multiple access (MC-FDMA) systems. CDMA can be implemented by radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), or Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented by radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or Evolved UTRA (E-UTRA). 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. 3GPP LTE adopts OFDMA in DL and SC-FDMA in UL. The evolutions of 3GPP LTE include LTE-A (Advanced), LTE-A Pro and / or 5G NR (New Radio).

[0034] For ease of description, the implementation of the present disclosure is mainly described with respect to a 3GPP-based wireless communication system. However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to a 3GPP-based wireless communication system, aspects of the present disclosure that are not limited to a 3GPP-based wireless communication system are applicable to other mobile communication systems.

[0035] For terms and techniques not specifically described among the terms and techniques used in the present disclosure, reference may be made to wireless communication standard documents published prior to the present disclosure.

[0036] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, "A or B" in the present disclosure may be interpreted as "A and / or B". For example, "A, B, or C" in the present disclosure may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0037] In the present disclosure, a slash ( / ) or a comma (,) may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0038] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, the expression "at least one of A or B" or "at least one of A and / or B" in the present disclosure may be interpreted as being the same as "at least one of A and B".

[0039] In addition, in the present disclosure, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "at least one of A, B, or C" or "at least one of A, B and / or C" may mean "at least one of A, B, and C".

[0040] In addition, the brackets used in the present disclosure may mean "for example". Specifically, when it is shown as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information". In other words, the "control information" in the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". In addition, even when it is shown as "control information (ie, PDCCH)", "PDCCH" may be proposed as an example of "control information".

[0041] The technical features described separately in one drawing of the present disclosure may be implemented separately or simultaneously.

[0042] Although not limited thereto, the various descriptions, functions, processes, suggestions, methods and / or operational flowcharts of the present disclosure disclosed herein may be applied to various fields requiring wireless communication and / or connection between devices (e.g., 5G).

[0043] Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings. Unless otherwise specified, the same reference numerals in the following drawings and / or descriptions may refer to the same and / or corresponding hardware blocks, software blocks and / or functional blocks.

[0044] Although a user equipment (UE) is illustrated by way of example in the drawings, the illustrated UE may be referred to as a terminal, a mobile equipment (ME), etc. In addition, the UE may be a portable device such as a notebook computer, a mobile phone, a PDA, a smart phone, and a multimedia device, or may be a non-portable device such as a PC or a vehicle-mounted device.

[0045] In the following, UE is used as an example of a wireless communication device (or wireless device or wireless equipment) capable of wireless communication. The operation performed by the UE may be performed by a wireless communication device. The wireless communication device may also be referred to as a wireless device, a wireless equipment, etc. In the following, AMF may refer to an AMF node, SMF may refer to an SMF node, and UPF may refer to a UPF node.

[0046] The base station used below generally refers to a fixed station that communicates with wireless devices, and may also be referred to as an evolved NodeB (eNodeB), an evolved NodeB (eNB), a base transceiver system (BTS), an access point, and a next-generation NodeB (gNB).

[0047] Figure 1 An example of a communication system to which an implementation of the present disclosure is applied is shown.

[0048] Figure 1 The 5G usage scenarios shown in are only exemplary, and the technical features of the present disclosure can be applied to Figure 1 Other 5G usage scenarios not shown.

[0049] The three main requirement categories for 5G include (1) enhanced mobile broadband (eMBB) category, (2) massive machine type communication (mMTC) category, and (3) ultra-reliable and low-latency communication (URLLC) category.

[0050] Some use cases may require multiple categories for optimization, and others may focus only on key performance indicators (KPIs). 5G supports these various use cases with a flexible and reliable approach.

[0051] eMBB goes far beyond basic mobile Internet access and covers a large number of two-way operations in the cloud and augmented reality as well as media and entertainment applications. Data is one of the core driving forces of 5G, and in the 5G era, dedicated voice services may not be provided for the first time. In 5G, it is expected that the data connection provided by the communication system will be used as an application to simply process voice. The main reason for the increase in traffic is due to the increase in content size and the increase in the number of applications that require high data transmission rates. As more devices are connected to the Internet, streaming services (audio and video), conversational video, and mobile Internet access will be more widely used. These many applications require connectivity in an always-on state to push real-time information and alerts to users. Cloud storage and applications are rapidly increasing in mobile communication platforms and can be applied to both operations and entertainment. Cloud storage is a special use case that accelerates the growth of uplink data transmission rates. 5G is also used for remote cloud operations. When using a tactile interface, 5G requires lower end-to-end latency to maintain a good experience for users. Entertainment (e.g., cloud games and video streaming) is another core element that increases the demand for mobile broadband capabilities. Entertainment is essential for smartphones and tablets anywhere, including in high mobility environments such as trains, vehicles and airplanes. Other use cases are augmented reality for entertainment and information search. In this case, augmented reality requires very low latency and instantaneous data volume.

[0052] Additionally, one of the most anticipated 5G use cases involves the ability to smoothly connect embedded sensors in all fields (i.e., mMTC). The number of potential Internet of Things (IoT) devices is expected to reach 20.4 billion by 2020. Industrial IoT is one of the categories that plays a major role in enabling smart cities, asset tracking, smart utilities, agriculture, and security infrastructure through 5G.

[0053] URLLC includes new services that will transform industries (e.g., autonomous vehicles) through remote control of key infrastructure and ultra-reliable / available low-latency links. To control smart grids, automate industry, enable robotics, and control and regulate drones, the level of reliability and latency is critical.

[0054] 5G is a means of providing streaming services estimated at a few hundred megabits per second to a gigabit per second, and can complement fiber to the home (FTTH) and cable-based broadband (or DOCSIS). Such fast speeds are needed to deliver 4K or higher (6K, 8K and higher) resolution TV as well as virtual reality and augmented reality. Virtual reality (VR) and augmented reality (AR) applications include virtually immersive sports games. Specific applications may require special network configurations. For example, for VR games, gaming companies need to merge core servers into network operators' edge network servers to minimize latency.

[0055] Along with many use cases for mobile communications for vehicles, it is expected that cars will become a new important driving force in 5G. For example, the entertainment of passengers requires high simultaneous capacity and mobile broadband with high mobility. This is because future users continue to expect high-quality connections regardless of their location and speed. Another use case in the automotive field is the AR dashboard. The AR dashboard enables the driver to identify objects in the dark in addition to the objects seen from the front window, and displays the distance to the object and the movement of the object by overlapping the information told to the driver. In the future, wireless modules will enable communication between vehicles, information exchange between vehicles and supporting infrastructure, and information exchange between cars and other connected devices (e.g., devices attached to pedestrians). The safety system guides alternative behavior processes so that drivers can drive more safely, thereby reducing the risk of accidents. The next stage will be remote control or autonomous vehicles. This requires very high reliability and very fast communication between different autonomous vehicles and between vehicles and infrastructure. In the future, autonomous vehicles will perform all driving activities, and drivers will only focus on abnormal traffic that cannot be recognized by the vehicle. The technical requirements of autonomous vehicles require ultra-low latency and ultra-high reliability to increase traffic safety to a level that humans cannot reach.

[0056] Smart cities and smart homes / buildings, known as smart societies, will be embedded in high-density wireless sensor networks. Distributed networks of smart sensors will identify conditions for cost and energy-saving maintenance in cities or homes. Similar configurations can be performed for individual homes. Temperature sensors, window and heating controllers, burglar alarms, and home appliances are all wirelessly connected. Many of these sensors typically have low data transfer rates, power, and costs. However, certain types of devices may require real-time HD video to perform monitoring.

[0057] The consumption and distribution of energy, including heat or gas, is distributed at a higher level, requiring automatic control of a distributed sensor network. Smart grids collect information and use digital information and communication technologies to connect sensors to each other to act according to the collected information. Since this information can include the behavior of power supply companies and consumers, smart grids can improve the distribution of fuels such as electricity by methods with efficiency, reliability, economic viability, production sustainability and automation. Smart grids can also be considered as another sensor network with low latency.

[0058] Mission-critical applications (e.g., e-health) are one of the 5G use cases. The health segment contains many applications that can enjoy the benefits of mobile communications. The communication system can support telemedicine that provides clinical treatment in distant places. Telemedicine can help reduce distance barriers and improve access to medical services that are not continuously available in remote rural areas. Telemedicine is also used to perform important treatments and save lives in emergency situations. Wireless sensor networks based on mobile communications can provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

[0059] Wireless and mobile communications are becoming increasingly important in the field of industrial applications. Cabling is expensive to install and maintain. Therefore, the possibility of replacing cables with reconfigurable wireless links is an attractive opportunity in many industrial fields. However, in order to achieve this replacement, wireless connections need to be established with latency, reliability and capacity similar to cables, and the management of wireless connections needs to be simplified. When it comes to connecting to 5G, low latency and very low error probability are new requirements.

[0060] Logistics and freight tracking are important use cases for mobile communications, which allow inventory and packages to be tracked anywhere using location-based information systems. Logistics and freight use cases typically require low data rates, but require location information with wide range and reliability.

[0061] Reference Figure 1 , the communication system 1 includes wireless devices 100a to 100f, a base station (BS) 200, and a network 300. Figure 1A 5G network is shown as an example of a network of the communication system 1, but implementations of the present disclosure are not limited to the 5G system and may be applied to future communication systems other than the 5G system.

[0062] The BS 200 and the network 300 may be implemented as wireless devices, and a specific wireless device may operate as a BS / network node relative to other wireless devices.

[0063] The wireless devices 100a to 100f represent devices that perform communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or LTE), and may be referred to as communication / radio / 5G devices. The wireless devices may include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing communication between vehicles. A vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an AR / VR / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, 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., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters.

[0064] In the present disclosure, the wireless devices 100a to 100f may be referred to as user equipment (UE). The UE may include, for example, a cellular phone, a smart phone, a laptop computer, a digital broadcast terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, a tablet personal computer (PC), a tablet PC, an ultrabook, a vehicle, a vehicle with an autonomous driving function, a connected car, a UAV, an AI module, a robot, an AR device, a VR device, an MR device, a holographic device, a public safety device, an MTC device, an IoT device, a medical device, a FinTech device (or a financial device), a security device, a weather / environmental device, a device related to 5G services, or a device related to the field of the fourth industrial revolution.

[0065] A UAV may be, for example, an aircraft that is flown by wireless control signals without humans on board.

[0066] VR devices may include, for example, devices for realizing objects or backgrounds of a virtual world. AR devices may include, for example, devices realized by connecting objects or backgrounds of a virtual world to objects or backgrounds of a real world. MR devices may include, for example, devices realized by merging objects or backgrounds of a virtual world into objects or backgrounds of a real world. Holographic devices may include, for example, devices for realizing 360-degree stereoscopic images by recording and reproducing stereoscopic information using an interference phenomenon of light generated when two lasers meet, called holography.

[0067] Public safety devices may include, for example, image relay devices or image devices wearable on a user's body.

[0068] MTC devices and IoT devices may be devices that do not require direct human intervention or manipulation, for example. For example, MTC devices and IoT devices may include smart meters, vending machines, thermometers, smart light bulbs, door locks, or various sensors.

[0069] For example, a medical device may be a device for the purpose of diagnosing, treating, alleviating, curing or preventing a disease. For example, a medical device may be a device for the purpose of diagnosing, treating, alleviating or correcting an injury or disorder. For example, a medical device may be a device for the purpose of inspecting, replacing or modifying a structure or function. For example, a medical device may be a device for the purpose of regulating pregnancy. For example, a medical device may include a device for treatment, a device for surgery, a device for (in vitro) diagnosis, a hearing aid or a device for surgery.

[0070] For example, a safety device may be a device installed to prevent possible danger and maintain safety. For example, a safety device may be a camera, a closed-circuit television (CCTV), a recorder, or a black box.

[0071] For example, a FinTech device may be a device that can provide financial services such as mobile payment. For example, a FinTech device may include a payment device or a point of sale (POS) system.

[0072] Weather / environmental devices may include, for example, devices for monitoring or predicting weather / environmental conditions.

[0073] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The 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, a 5G (e.g., NR) network, and a super 5G 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 passing through the BS 200 / network 300. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (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.

[0074] Wireless communication / connection 150a, 150b, and 150c may be established between wireless devices 100a to 100f and / or between wireless devices 100a to 100f and BS 200 and / or between BS 200. In this document, wireless communication / connection may be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication (or device-to-device (D2D) communication) 150b, inter-base station communication 150c (e.g., relay, integrated access and backhaul (IAB)), etc. The wireless devices 100a to 100f and BS 200 / wireless devices 100a to 100f may send / receive radio signals to each other through wireless communication / connection 150a, 150b, and 150c. For example, wireless communication / connection 150a, 150b, and 150c may send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of a resource allocation process may be performed based on various proposals of the present disclosure.

[0075] AI means the field that studies artificial intelligence or methods that can create it, and machine learning refers to the field that defines the various problems addressed in the field of AI and methods to solve them. Machine learning is also defined as an algorithm that improves the performance of a task through steady experience with the task.

[0076] A robot means a machine that automatically processes or operates a given task by its own ability. Specifically, a robot that has the ability to recognize the environment and make self-determination to perform actions can be called an intelligent robot. According to the purpose or field of use, robots can be classified into industrial, medical, household, military, etc. The robot can perform various physical operations such as moving the robot joints using actuators or motors. The movable robot also includes wheels, brakes, propellers, etc. on the drive, allowing it to drive on the ground or fly in the air.

[0077] Autonomous driving means the technology of self-driving, and autonomous vehicles mean vehicles that are driven without user control or with minimal user control. For example, autonomous driving may include keeping lane movement, automatically adjusting speed (e.g., adaptive cruise control), automatically driving along a set route, and automatically setting a route when a destination is set. Vehicles include vehicles equipped with internal combustion engines, hybrid vehicles equipped with internal combustion engines and electric motors, and electric vehicles equipped with electric motors, and may include trains, motorcycles, etc. as well as cars. Autonomous vehicles can be regarded as robots with autonomous driving capabilities.

[0078] Extended reality is collectively referred to as VR, AR, and MR. VR technology only provides objects and backgrounds of the real world through computer graphics (CG) images. AR technology provides virtual CG images on top of real object images. MR technology is a CG technology that combines virtual objects into the real world. MR technology is similar to AR technology in that they show real objects and virtual objects together. However, the difference is that in AR technology, virtual objects are used as a complementary form of real objects, while in MR technology, virtual objects and real objects are used as the same characteristics.

[0079] NR supports multiple parameter sets (and / or multiple subcarrier spacing (SCS)) to support various 5G services. For example, if the SCS is 15kHz, wide areas can be supported in traditional cellular bands, and if the SCS is 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. If the SCS is 60kHz or higher, bandwidths greater than 24.25GHz can be supported to overcome phase noise.

[0080] The NR frequency band may be defined as two types of frequency ranges, namely, FR1 and FR2. The numerical values ​​of the frequency ranges may vary. For example, the two types of frequency ranges (FR1 and FR2) may be as shown in Table 1. For ease of explanation, in the frequency ranges used in the NR system, FR1 may mean "below 6 GHz range", FR2 may mean "above 6 GHz range", and may be referred to as millimeter wave (mmW). FR2 may include FR 2-1 and FR 2-2 as shown in the examples of Tables 1 and 2.

[0081] [Table 1]

[0082]

[0083] As described above, the numerical value of the frequency range of the NR system can be changed. For example, FR1 may include a frequency band of 410 MHz to 7125 MHz as shown in Table 2 below. That is, FR1 may include a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed frequency band. The unlicensed frequency band can be used for various purposes (e.g., for communication of vehicles (e.g., autonomous driving)).

[0084] [Table 2]

[0085]

[0086] Here, the radio communication technology implemented in the wireless device in the present disclosure may include narrowband Internet of Things (NB-IoT) technology for low-power communication as well as LTE, NR and 6G. For example, NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology, which may be implemented in specifications such as LTE Cat NB1 and / or LTE Cat NB2, and may not be limited to the above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the present disclosure may communicate based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology, and may be referred to as various names such as enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented in at least one of various specifications such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and may not be limited to the above names. Additionally and / or alternatively, the radio communication technology implemented in the wireless device in the present disclosure may include at least one of ZigBee, Bluetooth, and / or LPWAN considering low-power communication, and may not be limited to the above names. For example, ZigBee technology may generate a personal area network (PAN) associated with low-power / low-power digital communication based on various specifications such as IEEE 802.15.4, and may be referred to as various names.

[0087] Figure 2 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0088] Reference Figure 2 , the first wireless device 100 and the second wireless device 200 may transmit / receive radio signals to / from an external device through various RATs (eg, LTE and NR).

[0089] exist Figure 2 In the example, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 1 At least one of {wireless devices 100a to 100f and BS200}, {wireless devices 100a to 100f and wireless devices 100a to 100f} and / or {BS200 and BS200}.

[0090] The first wireless device 100 may include at least one transceiver (eg, transceiver 106 ), at least one processing chip (eg, processing chip 101 ), and / or one or more antennas 108 .

[0091] The processing chip 101 may include at least one processor (eg, processor 102 ) and at least one memory (eg, memory 104 ). Figure 2 It is exemplarily shown that the memory 104 is included in the processing chip 101. Additionally and / or alternatively, the memory 104 may be placed outside the processing chip 101.

[0092] The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operational flow charts described in the present disclosure. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then send a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104.

[0093] The memory 104 may be operatively connected to the processor 102. The memory 104 may store various types of information and / or instructions. The memory 104 may store software code 105 implementing instructions that, when executed by the processor 102, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the software code 105 may implement instructions that, when executed by the processor 102, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the software code 105 may control the processor 102 to execute one or more protocols. For example, the software code 105 may control the processor 102 to execute one or more layers of a radio interface protocol.

[0094] 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 transmit and / or receive radio signals through one or more antennas 108. Each transceiver 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, the first wireless device 100 may represent a communication modem / circuit / chip.

[0095] The second wireless device 200 may include at least one transceiver (eg, transceiver 206 ), at least one processing chip (eg, processing chip 201 ), and / or one or more antennas 208 .

[0096] The processing chip 201 may include at least one processor (eg, processor 202 ) and at least one memory (eg, memory 204 ). Figure 2 It is exemplarily shown that the memory 204 is included in the processing chip 201. Additionally and / or alternatively, the memory 204 may be placed outside the processing chip 201.

[0097] The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operational flow charts described in the present disclosure. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then send a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 106, and then store information obtained by processing the fourth information / signals in the memory 204.

[0098] The memory 204 may be operatively connected to the processor 202. The memory 204 may store various types of information and / or instructions. The memory 204 may store software code 205 implementing instructions that, when executed by the processor 202, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the software code 205 may implement instructions that, when executed by the processor 202, perform the descriptions, functions, processes, suggestions, methods, and / or operational flow charts disclosed in the present disclosure. For example, the software code 205 may control the processor 202 to execute one or more protocols. For example, the software code 205 may control the processor 202 to execute one or more layers of a radio interface protocol.

[0099] 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 transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, the second wireless device 200 may represent a communication modem / circuit / chip.

[0100] Hereinafter, 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 a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). 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 description, function, process, suggestion, method, and / or operation flowchart disclosed in the present disclosure. One or more processors 102 and 202 may generate messages, control information, data, or information according to the description, function, process, suggestion, method, and / or operation flowchart disclosed in the present disclosure. 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, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 according to the description, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in the present disclosure, and obtain the PDU, SDU, message, control information, data, or information.

[0101] 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. As an 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, suggestions, methods, and / or operational flow charts disclosed in the present disclosure 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, suggestions, methods, and / or operational flow charts disclosed in the present disclosure may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 so as to be driven by one or more processors 102 and 202. The descriptions, functions, processes, suggestions, methods and / or operational flow charts disclosed in this disclosure may be implemented using software or firmware in the form of codes, commands and / or command sets.

[0102] 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 by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, register, flash memory, computer-readable storage medium, and / or a combination 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 by various technologies such as wired or wireless connections.

[0103] One or more transceivers 106 and 206 can send user data, control information and / or radio signals / channels mentioned in the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure to one or more other devices. One or more transceivers 106 and 206 can receive user data, control information and / or radio signals / channels mentioned in the description, function, process, suggestion, method and / or operation flow chart disclosed in the present disclosure from one or more other devices. For example, one or more transceivers 106 and 206 can be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can receive user data, control information or radio signals from one or more other devices.

[0104] 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 transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, suggestions, methods, and / or operation flow charts disclosed in the present disclosure through one or more antennas 108 and 208. In the present disclosure, one or more antennas 108 and 208 may be multiple physical antennas or multiple logical antennas (e.g., antenna ports).

[0105] One or more transceivers 106 and 206 may convert received user data, control information, radio signals / channels, etc. from RF band signals into baseband signals so as to process the received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals into RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters. For example, one or more transceivers 106 and 206 may up-convert OFDM baseband signals into OFDM signals through their (analog) oscillators and / or filters under the control of one or more processors 102 and 202, and transmit the up-converted OFDM signals at a carrier frequency. One or more transceivers 106 and 206 may receive the OFDM signal at a carrier frequency and down-convert the OFDM signal to an OFDM baseband signal through its (analog) oscillator and / or filter under the control of one or more processors 102 and 202 .

[0106] In an implementation of the present disclosure, a UE may operate as a transmitting device in an uplink (UL) and as a receiving device in a downlink (DL). Within an implementation of the present disclosure, a BS may operate as a receiving device in the UL and as a transmitting device in the DL. In the following, for ease of description, it is mainly assumed that the first wireless device 100 acts as a UE and the second wireless device 200 acts as a BS. For example, a processor 102 connected to, installed on, or started in the first wireless device 100 may be configured to perform UE behavior according to an implementation of the present disclosure, or to control a transceiver 106 to perform UE behavior according to an implementation of the present disclosure. A processor 202 connected to, installed on, or started in the second wireless device 200 may be configured to perform BS behavior according to an implementation of the present disclosure, or to control a transceiver 206 to perform BS behavior according to an implementation of the present disclosure.

[0107] In this disclosure, a BS is also referred to as a Node B (NB), an eNodeB (eNB), or a gNB.

[0108] Figure 3 An example of a wireless device to which an implementation of the present disclosure is applied is shown.

[0109] Can be based on use cases / services (see Figure 1 ) Wireless devices are implemented in various forms.

[0110] Reference Figure 3, the wireless devices 100 and 200 may correspond to Figure 2 The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 2 One or more processors 102 and 202 and / or Figure 2 One or more memories 104 and 204. For example, the transceiver 114 may include Figure 2 One or more transceivers 106 and 206 and / or Figure 2 The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of each of the wireless devices 100 and 200. For example, the control unit 120 may control the electrical / mechanical operation of each of the wireless devices 100 and 200 based on the program / code / command / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) through a wireless / wired interface via the communication unit 110, or store information received from the outside (e.g., other communication devices) through a wireless / wired interface via the communication unit 110 in the memory unit 130.

[0111] The additional component 140 may be variously configured according to the type of the wireless devices 100 and 200. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit (e.g., an audio I / O port, a video I / O port), a driving unit, and a computing unit. The wireless devices 100 and 200 may be in the form of (but not limited to) a robot ( Figure 1 100a), vehicles ( Figure 1 100b-1 and 100b-2), XR devices ( Figure 1 100c), handheld device ( Figure 1 100d), household appliances ( Figure 1 100e), IoT devices ( Figure 1 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, FinTech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 1 400), BS( Figure 1in the form of wireless devices 100 and 200), network nodes, etc. The wireless devices 100 and 200 can be used in mobile or fixed positions according to usage examples / services.

[0112] In Figure 3 , various elements, components, units / parts, and / or modules in the wireless devices 100 and 200 can be connected to each other through a wired interface, or at least a part of them can be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 can be wired-connected, and the control unit 120 and the first units (e.g., 130 and 140) can be wirelessly connected through the communication unit 110. Each element, component, unit / part, and / or module within the wireless devices 100 and 200 can also include one or more elements. For example, the control unit 120 can be configured by a set of one or more processors. As an example, the control unit 120 can be configured by a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphics processing unit, and a memory control processor. As another example, the memory unit 130 can be configured by RAM, DRAM, ROM, flash memory, volatile memory, non-volatile memory, and / or their combination.

[0113] <NR's operating frequency band>

[0114] The operating frequency bands in NR are as follows.

[0115] The operating frequency bands in Table 3 below are the operating frequency bands converted (refarmed) from the operating frequency bands of LTE / LTE-A. This can be referred to as the FR1 band.

[0116] [Table 3]

[0117]

[0118] The following table shows the NR operating frequency bands defined at high frequencies. This is called the FR2 band.

[0119] [Table 4]

[0120]

[0121] <Overview of 6G systems>

[0122] The 6G (wireless communication) system has purposes such as (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-free IoT devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The conception of the 6G system may include four aspects such as "intelligent connectivity", "deep connectivity", "holographic connectivity", and "universal connectivity", and the 6G system may meet the requirements shown in Table 5 below. That is, Table 5 shows the requirements of the 6G system.

[0123] [Table 5]

[0124] Peak data rate per device 1Tbps E2E Latency 1ms Maximum spectral efficiency 100bps / Hz Mobility support Up to 1000km / hr Satellite Integration completely AI completely Autonomous Vehicles completely XR completely Tactile communication completely

[0125] The 6G system may have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), massive machine type communications (mMTC), AI integrated communications, tactile Internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0126] Figure 4 is a diagram showing an example of a communication structure that can be provided in a 6G system.

[0127] The 6G system will have 50 times higher simultaneous wireless communication connectivity than the 5G wireless communication system. In 6G communication, URLLC (a key feature of 5G) will become a more important technology by providing an end-to-end delay of less than 1ms. At this time, unlike the frequently used regional spectrum efficiency, the 6G system can have much better volumetric spectrum efficiency (volumetricspectrum efficiency). The 6G system can provide advanced battery technology for energy collection and very long battery life. Therefore, in the 6G system, mobile devices may not need to be charged separately. In addition, in 6G, new network features may be as follows.

[0128] -Satellite integrated network: To provide global mobile groups, 6G will be integrated with satellites. Integrating ground waves, satellites, and public networks into one wireless communication system may be very important for 6G.

[0129] -Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary, and wireless evolution can be updated from "connecting things" to "connected intelligence." AI can be applied to every step of the communication process (or every step of the signal processing process described below).

[0130] - Seamless integration of wireless information and energy transfer: 6G wireless networks can deliver power to charge the batteries of devices such as smartphones and sensors. Therefore, wireless information and energy transfer (WIET) will be integrated.

[0131] -Ubiquitous super 3-dimemtion connectivity: Access to networks and core network functions from drones and very low earth orbit satellites will establish super 3D connectivity ubiquitously in 6G.

[0132] Among the new network features of 6G, several general requirements can be as follows

[0133] -Small cell network: The idea of ​​small cell network is introduced to improve the throughput, energy efficiency and spectrum efficiency in cellular systems to improve the quality of received signals. Therefore, small cell network is a basic feature for 5G and beyond 5G (5GB) communication systems. Therefore, 6G communication systems will also adopt the characteristics of small cell network.

[0134] -Ultra-dense heterogeneous network: Ultra-dense heterogeneous network will be another important feature of 6G communication system. Multi-layer network composed of heterogeneous networks will improve the overall QoS and reduce costs.

[0135] - High Capacity Backhaul: Backhaul connections are characterized by a high capacity backhaul network in order to support high capacity traffic. High speed optical fiber and Free Space Optics (FSO) systems may be possible solutions to this problem.

[0136] - Radar technology integrated with mobile technology: High-precision positioning (or location-based services) through communication is one of the functions of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0137] -Software and virtualization: Software and virtualization are two important features that are the basis of the design process in 5GB networks to ensure flexibility, reconfigurability and programmability. In addition, shared physical infrastructure can share billions of devices.

[0138] <Core Implementation Technology of 6G System>

[0139] AI

[0140] The most important and latest technology to be introduced in the 6G system is AI. The 4G system does not involve AI. The 5G system will support partial or very limited AI. However, the 6G system will support AI for full automation. In 6G, advances in machine learning will create smarter networks for real-time communications. In the case where AI is introduced into communications, real-time data transmission can be simplified and improved. AI can use many analyses to determine ways to perform complex target operations. That is, AI can improve efficiency and reduce processing delays.

[0141] Time-consuming tasks such as switching, network selection, and resource scheduling can be performed instantly by using AI. AI can even play an important role in M2M, machine-to-man, and man-to-machine communications. In addition, AI can be a fast communication in brain-computer interfaces (BCI). AI-based communication systems can be supported by metamaterials, smart structures, smart networks, smart devices, smart cognitive radios, self-maintaining wireless networks, and machine learning.

[0142] Recently, attempts have been made to integrate AI with wireless communication systems in the application layer or network layer, but deep learning has been concentrated in the field of wireless resource management and allocation. However, this research has gradually developed to the MAC layer and the physical layer, and specifically, attempts have begun to combine deep learning in the physical layer with wireless transmission. AI-based physical layer transmission refers to the application of AI-driven signal processing and communication mechanisms instead of traditional communication frameworks in basic signal processing and communication mechanisms. For example, it may include deep learning-based channel coding and decoding, deep learning-based signal estimation and detection, deep learning-based multiple-input multiple-output (MIMO) mechanisms, AI-based resource scheduling and allocation, etc.

[0143] Machine learning can be used for channel estimation and channel tracking, and can be used for power allocation, interference cancellation, etc. in the physical layer of DL. In addition, machine learning can be used for antenna selection, power control, symbol detection, etc. in MIMO systems.

[0144] Machine learning refers to a series of operations to train a machine in order to create a machine that can perform tasks that cannot be performed by humans or are difficult to perform by humans. Machine learning requires data and a learning model. In machine learning, data learning methods can be roughly divided into three methods, that is, supervised learning, unsupervised learning, and reinforcement learning.

[0145] Neural network learning is to minimize the output error. Neural network learning refers to the process of repeatedly inputting training data into the neural network, calculating the error between the output of the neural network and the target for the training data, backpropagating the error of the neural network from the output layer of the neural network to the input layer in order to reduce the error and update the weight of each node of the neural network.

[0146] Supervised learning can use training data marked with the correct answer, and unsupervised learning can use training data that is not marked with the correct answer. That is, for example, in the case of supervised learning for data classification, the training data can be marked with categories. The marked training data can be input to the neural network, and the output (category) of the neural network can be compared with the label of the training data to calculate the error. The calculated error is back-propagated from the neural network backward (that is, from the output layer to the input layer), and the connection weights of each node of each layer of the neural network can be updated according to the back-propagation. The change in the updated connection weight of each node can be determined according to the learning rate. The calculation of the neural network for the input data and the back-propagation of the error can configure the learning cycle (epoch). The learning data is applied differently according to the number of repetitions of the learning cycle of the neural network. For example, in the early stages of learning of the neural network, a high learning rate can be used to improve efficiency so that the neural network quickly ensures a certain level of performance, and in the later stages of learning, a low learning rate can be used to improve accuracy.

[0147] The learning method can vary depending on the characteristics of the data. For example, in order to accurately predict the data sent from the transmitter in the receiver in the communication system, supervised learning can be used instead of unsupervised learning or reinforcement learning to perform learning.

[0148] The learning model corresponds to the human brain and can be regarded as the most basic linear model. However, the paradigm of machine learning using a neural network structure with high complexity (such as an artificial neural network) as a learning model is called deep learning.

[0149] The neural network core used as the learning method can generally include a deep neural network (DNN) method, a convolutional deep neural network (CNN) method, a recurrent Boltzmann machine (RNN) method, and a spiking neural network (SNN). Such a learning model is applicable.

[0150] THz (Terahertz) Communication

[0151] The data rate can be increased by increasing the bandwidth. This can be achieved by using (sub-THz) sub-THz communications with wide bandwidth and applying advanced massive MIMO technology. THz waves (also called submillimeter radiation) generally indicate a frequency band between 0.1THz and 10THz, where the corresponding wavelength is in the range of 0.03mm to 3mm. The 100GHz to 300GHz band range (sub-THz band) is considered to be the main part of the THz band for cellular communications. With the addition of the sub-THz band to the millimeter wave band, the 6G cellular communication capacity is increased. 300GHz to 3THz in the defined THz band is in the far infrared (IR) band. The band from 300GHz to 3THz is part of the optical band, but it is on the boundary of the optical band and just behind the RF band. Therefore, the band from 300GHz to 3THz has similarities with RF.

[0152] Figure 5 An example of the electromagnetic spectrum is shown.

[0153] The main characteristics of THz communications include (i) widely available bandwidth supporting very high data rates, and (ii) high path loss occurring at high frequencies (highly directional antennas are indispensable). The narrow beamwidth generated in highly directional antennas reduces interference. The small wavelength of THz signals allows a larger number of antenna elements to be integrated with devices and BSs operating in this frequency band. Therefore, advanced adaptive deployment techniques that can overcome range limitations can be used.

[0154] Massive MIMO

[0155] One of the core technologies for improving spectrum efficiency is MIMO technology. When MIMO technology improves, spectrum efficiency also improves. Therefore, large-scale MIMO technology will be important in 6G systems. Since MIMO technology uses multiple paths, multiplexing technology and beamforming and management technology suitable for THz bands should be considered to enable data signals to be sent through one or more paths.

[0156] Holographic Beamforming

[0157] Beamforming is a signal processing process that adjusts an antenna array to send a radio signal in a specific direction. This is a subset of smart antennas or advanced antenna systems. Beamforming technology has multiple advantages such as high signal-to-noise ratio, interference prevention and suppression, and high network efficiency. Holographic beamforming (HBF) is a new beamforming method that is significantly different from MIMO systems because this uses software-defined antennas. HBF will be a very effective method for efficiently and flexibly sending and receiving signals in multi-antenna communication devices in 6G.

[0158] Optical Wireless Technology

[0159] Optical wireless communication (OWC) is a form of optical communication that uses visible light, infrared light (IR), or ultraviolet light (UV) to carry signals. OWC that operates in the visible light band (e.g., 390nm to 750nm) is often referred to as visible light communication (VLC). VLC implementations can utilize light emitting diodes (LEDs). VLC can be used in a variety of applications, including wireless local area networks, wireless personal area networks, and vehicle-mounted networks.

[0160] VLC has multiple advantages over RF-based technologies. First, the spectrum occupied by VLC is idle / licensed and can provide a wide bandwidth (THz level bandwidth). Second, VLC rarely causes significant interference to other electromagnetic devices; therefore, VLC can be applied to sensitive electromagnetic interference applications, such as airplanes and hospitals. Third, VLC has advantages in communication security and privacy. The transmission medium (i.e., visible light) of VLC-based networks cannot pass through walls and other opaque obstacles. Therefore, the transmission range of VLC can be limited to indoors, which can protect the privacy and sensitive information of users. Fourth, VLC can use any light source as a base station, thereby eliminating the need for expensive base stations.

[0161] Free space optics (FSO) is an optical communication technology that uses light propagating in free space (such as air), external space, and vacuum to send data wirelessly for telecommunications or computer networks. FSO can be used as a point-to-point OWC system on the ground. FSO can operate at near infrared frequencies (750nm-1600nm). Laser transmitters can be used in FSO implementations, and FSO can provide high data rates (e.g., 10Gbit / s), providing a potential solution to the backhaul bottleneck.

[0162] In addition to RF-based communications for all possible devices to access networks, these OWC technologies are also planned to be used for 6G communications. These networks will connect access networks to backhaul / fronthaul networks. OWC technologies have been in use since 4G communication systems, but will be more widely used to meet the needs of 6G communication systems. OWC technologies such as optical fidelity, visible light communication, optical camera communication, and FSO communication based on optical bands are already well-known technologies. Communications based on optical wireless technology can provide extremely high data rates, low latency, and secure communications.

[0163] Light Detection and Ranging (LiDAR) is also based on optical bands and can be used for ultra-high-resolution 3D mapping in 6G communications. LiDAR is a remote sensing method that uses near-infrared, visible, and ultraviolet light to illuminate an object and the reflected light is detected by a light sensor to measure the distance. LiDAR can be used for fully autonomous driving of cars.

[0164] FSO Backhaul Network

[0165] The characteristics of the transmitter and receiver of the FSO system are similar to those of the optical fiber network. Therefore, the data transmission of the FSO system is similar to that of the optical fiber system. Therefore, FSO can be a good technology for providing backhaul connection in 6G system together with the optical fiber network. When using FSO, even very long-distance communication is possible at a distance of 10,000 km or more. FSO supports a large number of backhaul connections for remote and non-remote areas such as oceans, space, underwater, and isolated islands. FSO also supports cellular base station connections.

[0166] Non-terrestrial network (NTN)

[0167] 6G systems will integrate terrestrial and aerial networks to support vertically extended user communications. 3D BS will be delivered via low-orbit satellites and UAVs. Adding new dimensions in terms of altitude and associated degrees of freedom makes 3D connectivity quite different from traditional 2D networks. NR sees non-terrestrial networks (NTNs) as a way to achieve this. NTNs are networks or network segments that use RF resources on satellites (or UAS platforms). For NTNs that provide access to user devices, there are two common scenarios: transparent payloads and regenerative payloads. The following are the basic elements of NTNs.

[0168] - One or more sat gateways connecting the NTN to the public data network.

[0169] -GEO satellites are fed by one or more satellite gateways deployed across the satellite target range (e.g., regional or continental coverage). We assume that a UE in a cell is served by only one sat gateway.

[0170] - Non-GEO satellites that are continuously served by one or more satellite gateways at a time. The system ensures service and feeder link continuity between the continuously served satellite gateways for a duration sufficient to allow mobility anchoring and handoff.

[0171] -Feeder link or radio link between the satellite gateway and the satellite (or UAS platform).

[0172] - A service link or radio link between the user equipment and the satellite (or UAS platform).

[0173] - Satellites (or UAS platforms) that can implement transparent payloads or regenerative (with onboard processing) payloads. Beams generated by satellites (or UAS platforms) typically generate multiple beams for a given service area, depending on the field of view. The footprint of the beam is typically elliptical. The field of view of a satellite (or UAS platform) depends on the onboard antenna pattern and the minimum angle of attack.

[0174] - Transparent Payload: RF filtering, frequency conversion and amplification so the waveform signal repeated by the payload remains unchanged.

[0175] - Regenerative payload: RF filtering, frequency conversion and amplification, demodulation / decryption, switching and / or routing, and coding / modulation. This is effectively the same as having all or part of the base station functionality (e.g., gNB) on a satellite (or UAS platform).

[0176] - For satellite deployment, optionally, an Inter-Satellite Link (ISL). This requires a regenerative payload on the satellite. The ISL can operate at RF frequencies or in the optical band.

[0177] - User equipment is served by a satellite (or UAS platform) within the target coverage area.

[0178] Typically, GEO satellites and UAS are used to provide continental, regional or local services.

[0179] Typically, constellations in LEO and MEO are used to provide coverage in both the northern and southern hemispheres. In some cases, constellations can also provide global coverage, including polar regions. The latter requires appropriate orbital inclination, sufficient beam generation, and links between satellites.

[0180] Quantum communication

[0181] Quantum communication is the next generation of communication technology, which can overcome the limitations of traditional communication (such as security and high-speed computing, etc.) by applying quantum mechanical properties to the field of information and communication. Quantum communication provides a means of generating, sending, processing and storing information that cannot be expressed in the form of 0 and 1 according to the binary bit information used in existing communication technology. In conventional communication technology, wavelength or amplitude is used to send information between the transmitter and the receiver, but in quantum communication, photons as the smallest light unit are used to send information between the transmitter and the receiver. Specifically, in the case of quantum communication, quantum uncertainty and quantum irreversibility can be used for polarization or phase difference of photons (light), so quantum communication has the characteristic of being able to communicate with perfect security. In addition, quantum communication can also use quantum entanglement under certain conditions to achieve ultra-high-speed communication.

[0182] No cell communication

[0183] The tight integration of multiple frequencies and heterogeneous communication technologies is key in 6G systems. As a result, users can move seamlessly from one network to another without having to create any manual configuration on their devices. The best network is automatically selected from the available communication technologies. This will destroy the limitations of the cell concept in wireless communications. Currently, user movement from one cell to another causes too many handovers in dense networks, resulting in handover failures, handover delays, data loss, and ping-pong effects. 6G cell-free communication will overcome all of this and provide better QoS.

[0184] Cell-free communication is defined as "a system in which a large number of geographically distributed antennas (APs) cooperate to serve a small number of terminals using the same time / frequency resources with the help of a fronthaul network and CPU". A single terminal is served by a collection of multiple APs (called an AP cluster). There are many ways to form an AP cluster, among which the method of configuring an AP cluster to significantly help improve the reception performance of a terminal is called a terminal-centric clustering method, and when using this method, the configuration is dynamically updated as the terminal moves. By adopting this device-centric AP clustering technology, the device is always at the center of the AP cluster, so there is no inter-cluster interference that may occur when the device is located at the boundary of the AP cluster. This cell-free communication will be achieved through multi-connectivity and multi-layer hybrid technologies as well as different heterogeneous radios in the device.

[0185] Integration of Wireless Information and Energy Transfer (WIET)

[0186] WIET uses the same field and waves as wireless communication systems. Specifically, sensors and smartphones will be charged using wireless power transfer during communication. WIET is a promising technology for extending the life of battery charging wireless systems. Therefore, devices without batteries will be supported in 6G communications.

[0187] Integration of wireless communications and sensing

[0188] Autonomous wireless networks are the ability to continuously detect dynamically changing environmental states and exchange information between different nodes. In 6G, sensing will be tightly integrated with communications to support autonomous systems.

[0189] Integrated access and backhaul networks

[0190] In 6G, the density of access networks will be huge. Each access network is connected by optical fiber and backhaul connections (such as FSO networks). In order to cope with a very large number of access networks, there will be tight integration between the access network and the backhaul network.

[0191] Big Data Analysis

[0192] Big data analytics is a complex process used to analyze various large data sets or big data. The process finds information such as hidden data, unknown correlations, and customer dispositions to ensure complete data management. Big data is collected from various sources such as videos, social networks, images, and sensors. This technology is widely used in 6G systems to process massive amounts of data.

[0193] Reconfigurable smart surfaces

[0194] There is a large body of research that considers the radio environment as a variable to be optimized along with the transmitter and receiver. The radio environment created by this approach is called a smart radio environment (SRE) or intelligent radio environment (IRE) to highlight its fundamental difference from past design and optimization criteria. Various terms have been proposed for SRE-enabled reconfigurable smart antenna (or intelligent reconfigurable antenna technology) technology, including reconfigurable metasurfaces, smart large smart surfaces (SLIS), large smart surfaces (LIS), reconfigurable smart surfaces (RIS), and intelligent reflective surfaces (IRS).

[0195] In the case of THz band signals, there are many shadow areas caused by obstacles due to the strong nature of the signal, and RIS technology is important for expanding the communication area by installing RIS near these shadow areas to enhance communication stability and realize additional value-added services. RIS is an artificial surface made of electromagnetic materials that can change the propagation of incoming and outgoing radio waves. Although RIS can be regarded as an extension of massive MIMO, it has an array structure and working mechanism different from massive MIMO. RIS also has the advantage of lower power consumption because it works as a reconfigurable reflector with passive elements, which means that it only passively reflects signals without using active RF chains. In addition, each of the passive reflectors in RIS must independently adjust the phase shift of the incident signal, which may be advantageous for wireless communication channels. By appropriately adjusting the phase shift with the help of the RIS controller, the reflected signal can be collected at the target receiver to increase the received signal power.

[0196] In addition to reflecting radio signals, there are RIS that can adjust transmission characteristics and refraction characteristics, and these RIS are mainly used for O2I (outdoor to indoor). Recently, STAR-RIS (simultaneous transmission and reflection RIS) that provides transmission while reflecting has also been actively studied.

[0197] metaverse

[0198] Metaverse is a portmanteau of the words "meta" meaning virtual, transcendent, and "universe" meaning space. Generally speaking, the metaverse is a three-dimensional virtual space where the same social and economic activities as in the real world are common.

[0199] Extended Reality (XR), a key technology to enable the Metaverse, is the fusion of virtual and real, which can extend the reality experience and provide a unique sense of immersion. The high bandwidth and low latency of 6G networks will enable users to experience more immersive virtual reality (VR) and augmented reality (AR) experiences.

[0200] Autonomous driving, self-driving

[0201] For perfect autonomous driving, vehicles must communicate with each other to notify each other of dangerous situations, or communicate with infrastructure such as parking lots and traffic lights to check information such as parking location information and signal change time. Vehicle-to-Everything (V2X), a key element in building autonomous driving infrastructure, is a technology that enables vehicles to communicate with various elements on the road and share information, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I), for autonomous driving.

[0202] In order to maximize the performance of autonomous driving and ensure high safety, fast transmission speeds and low latency technologies are necessary. In addition, in the future, autonomous driving will go beyond delivering warning or guidance messages to the driver to actively intervene in vehicle operations and directly control the vehicle in dangerous situations, and the amount of information that needs to be sent and received will be large, so 6G is expected to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0203] Unmanned Aerial Vehicles (UAV)

[0204] Unmanned aerial vehicles (UAVs) or drones will be an important factor in 6G wireless communications. In most cases, UAV technology is used to provide high-speed data wireless connections. The base station entity is installed in the UAV to provide cellular connectivity. UAV has specific features not found in fixed base station infrastructure, such as easy deployment, strong line of sight links, and freedom of controlled mobility. During emergencies such as natural disasters, the deployment of terrestrial telecommunication infrastructure is economically unfeasible and sometimes cannot provide services in volatile environments. UAVs can easily handle this situation. UAVs will be a new paradigm in the field of wireless communications. This technology contributes to three basic requirements of wireless networks, such as eMBB, URLLC, and mMTC. UAVs can also serve many purposes, such as improved network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, and accident monitoring. Therefore, UAV technology is considered to be one of the most important technologies for 6G communications.

[0205] Blockchain

[0206] Blockchain will be an important technology for managing large amounts of data in future communication systems. Blockchain is a form of distributed ledger technology, and a distributed ledger is a database distributed across numerous nodes or computing devices. Each node replicates and stores the same copy of the ledger. Blockchain is managed through a peer-to-peer (P2P) network. This can exist without being managed by a centralized agency or server. Blockchain data is collected together and organized into blocks. Blocks are connected to each other and protected using encryption. Blockchain fully complements large-scale IoT through improved interoperability, security, privacy, stability and scalability. Therefore, blockchain technology provides multiple functions, such as interoperability between devices, high-capacity data traceability, autonomous interaction of different IoT systems, and large-scale connection stability of 6G communication systems.

[0207] <Disclosure of this specification>

[0208] 1. The first disclosure of this specification

[0209] Conventionally, in a single carrier in the FR1 band, a 29dBm high power terminal based on 4Tx is not supported. It is necessary to support a 29dBm high power terminal based on 4Tx.

[0210] To this end, a UE Tx radio frequency (RF) standard performance standard related to a 29dBm high power terminal based on 4Tx should be defined. For example, for a 29dBm high power terminal based on 4Tx, a Tx RF performance standard, maximum power reduction (MPR), may be defined.

[0211] In the disclosure of this specification, the transmission performance requirement standard for a terminal supporting 4Tx FR1 terminal will be described. For example, MPR is proposed. In addition, in the disclosure of this specification, related standards including uplink multiple input multiple output (UL-MIMO) will be described.

[0212] 1-1. Existing FR1 terminal transmission requirements

[0213] First, the existing FR1 terminal transmission requirements will be described. The FR1 terminal transmission requirements may include, for example, FR1 power level, UL-MIMO (2 layers), and MPR for UL-MIMO (2 layers).

[0214] The FR1 power level is described.

[0215] The transmission requirements for a conventional FR1 terminal are determined by considering up to 2Tx (ie, two transmit antennas).

[0216] Based on the output power at the antenna connector, the power class (PC) of the terminal is defined as follows: Here, in the case of two transmit antennas, the power class is defined as the sum of the total power output of each antenna to the terminal.

[0217] - Power level 3 (PC3) = 23dBm

[0218] - Power level 2 (PC2) = 26dBm

[0219] - Power level 1.5 (PC1.5) = 29dBm

[0220] Supports PC3, PC2 and PC1.5 based on the following power amplifier (PA).

[0221] -PC3(23dBm):

[0222] 1Tx(1PA):23dBm

[0223] 2Tx(2PA): 23dBm+23dB. In this case, (3-3)+(23-3)dBm, 3dB power backoff is performed for each 23dBm PA.

[0224] -PC2(26dBm):

[0225] 1Tx(1PA):26dBm

[0226] 2Tx(2PA): 23dBm+23dBm→FullPwrMode1.

[0227] 2Tx(2PA): 23dBm+26dBm->FullPwrMode2. In this case, 3dB power backoff is performed for 23+(26-3)dBm, 26dBm PA.

[0228] -2Tx(2PA): 26dBm+26dBm->FullPwrMode. In this case, (36-3)+(26-3)dBm, 3dB power backoff is performed for each 26dBm PA.

[0229] -PC1.5(29dBm)

[0230] 2Tx(2PA): 26dBm+26dBm

[0231] Here, FullPwrMode, FullPwrMode1, and FullPwrMode2 will be described as follows.

[0232] The uplink full power transmission mode can be set for a terminal supporting UL-MIMO. The uplink full power transmission mode includes 'FullPwrMode1', 'FullPwrMode2', and 'FullPwrMode'.

[0233] A FullPwrMode1 terminal may be a terminal in which the sum of the transmit powers of the entire antenna connectors of UL-MIMO satisfies the corresponding 'ue_PowerClass'. A FullPwrMode2 terminal may be a terminal in which the transmit power of one antenna connection among the entire antenna connections of UL-MIMO satisfies the corresponding 'ue_PowerClass'. A FullPwrMode terminal may be a terminal in which the transmit power of each antenna connector of UL-MIMO satisfies the corresponding 'ue_PowerClass'. For example, the terminal may send capability information including information about its uplink full-power transmission mode to the base station.

[0234] An example of full power transmission can be found in Figures 7a to 7c (B-1), (B-2) and (B-3).

[0235] UL-MIMO (2 layers) is described.

[0236] The PC3 terminal standard, PC2 terminal standard, and PC1 terminal standard supporting two-layer UL-MIMO may be as follows. Fig.10 The transmit precoding matrix indicator One SRS resource and two SRS antenna ports, a PC3 terminal standard, a PC2 terminal standard, and a PC1 terminal standard may be defined.

[0237] Methods for implementing 2PA of 2Tx terminals include 23dBm+23dBm, 23dBm+26dBm, 26dBm+26dBm, etc. For example, if the 2PA implementation of the 2Tx terminal is 23dBm+26dBm, it can be indicated that the maximum output of one of the two PAs of the terminal is 23dBm and the maximum output of the other PA is 26dBm. The terminal can support the power corresponding to the signaling 'ul-Power Class' sent to the base station using the uplink full power transmission mode (FullPwrMode1, FullPwrMode2, and FullPwrMode). The terminal can notify the network of the capability including information about the uplink full power transmission mode.

[0238] In the case of PC3 terminals supporting two layers of UL-MIMO, they can be designated as PC3 based on the 'ue_PowerClass' signal information. If these terminals transmit to two antenna ports, the total transmit power at the two antenna connectors must meet 23dBm for the following two cases:

[0239] -When 2-layer UL-MIMO is set to the terminal

[0240] -When 1-layer UL-MIMO is set to the terminal

[0241] In case of 1-layer UL-MIMO, the transmit power at one antenna connector should meet 23dBm in the following TPMI:

[0242] -TPMI = 0 or 1 (corresponding to Fig. 9 In )

[0243] The terminal can transmit by switching from two antenna ports to one antenna port. In this case, the transmit power at one antenna connector of the terminal must meet 23dBm:

[0244] -For non-UL-MIMO setup

[0245] For reference, it is assumed that the uplink full power transmission mode is not applied to the PC3 terminal. This is because the PC3 terminal basically uses a 23dBm PA. When the uplink full power transmission mode is set in the PC3 terminal, it can be assumed that 'FullPwrMode' is set.

[0246] In the case of PC2 terminals supporting two layers of UL-MIMO, they can be designated as PC2 based on the 'ue_PowerClass' signal information. If these terminals transmit to two antenna ports, the total transmit power at the two antenna connectors shall meet 26dBm for the following two cases:

[0247] -When 2-layer UL-MIMO is set to the terminal

[0248] -When 1-layer UL-MIMO is set to the terminal

[0249] For Layer 1 UL-MIMO, if uplink full power transmission mode is supported,

[0250] -FullPwrMode1: Based on ( Fig. 9 ), meeting the total transmit power of 26dBm at the two antenna connectors. It is applied to 23dBm+23dBm PA terminals.

[0251] -FullPwrMode2: TPMI = 0 or 1 (in Fig. 9 Corresponding to ), which meets the transmission power of 26dBm at one antenna connector. It is applied to 23dBm+26dBM PA terminals.

[0252] -FullPwrMode2: TPMI = 0 or 1 (in Fig. 9 Corresponding to ), which meets the transmission power of 26dBm at one antenna connector. It is applied to 23dBm+26dBM PA terminals.

[0253] When such a terminal switches to one antenna port and transmits (without UL-MIMO), the following may apply depending on whether 'txDiversity-r16' is supported:

[0254] - If 'txDiversity-r16' is not specified, a transmit power of 26dBm at one antenna connector is satisfied.

[0255] - When 'txDiversity-r16' is specified, the sum of the transmit powers at the two antenna connectors is 26dBm.

[0256] In the case of a PC1.5 terminal that supports 2-layer UL-MIMO, it is designated as PC1.5 based on the 'ue_PowerClass' signal information. When such a terminal transmits through two antenna ports, the total transmit power of the two antenna connectors must meet 29dBm for the following two cases:

[0257] -When 2-layer UL-MIMO is configured;

[0258] - When 1-layer UL-MIMO is set. In this case, TPMI=2, 3, 4, or 5 is applied (in Fig. 9 In, corresponding to ). TPMI = 0 and 1 are not applicable.

[0259] For PC1.5 terminals supporting two-layer UL-MIMO, the uplink full power transmission mode may not be applied (29dBm PA is not considered, and only 26dBm+26dBm is considered). When the terminal switches to one antenna port and transmits it (no UL-MIMO), it is assumed that 'txDiversity-r16' is supported. In this case, 'txDiversity-r16' can be specified. For example, the sum of the transmit power at the two antenna connectors must be 29dBm.

[0260] The following Figures 6 to 8 Examples of 1Tx, 2Tx supporting UL-MIMO, and 2Tx supporting Tx diversity are shown.

[0261] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0262] Figure 6 An example of a 1Tx terminal according to an embodiment of the present specification is illustrated. Figures 7a to 7c An example of a 2Tx terminal supporting UL-MIMO according to an embodiment of this specification is illustrated. Figure 8 An example of a 2Tx terminal supporting Tx diversity according to an embodiment of this specification is illustrated.

[0263] Figures 6 to 8 The example of exemplifies examples of a 1Tx terminal based on one antenna port, a 2Tx terminal supporting UL-MIMO based on two antenna ports, and a 2Tx terminal supporting Tx diversity based on one antenna port.

[0264] exist Figures 6 to 8 In the example of FIG. 1 , the position of the antenna port and the position of the antenna end are illustrated. In addition, the position where the maximum power (MOP) is measured and the position where the maximum power reduction (MPR) is measured are shown. For example, the sum of the transmit power and the MPR is measured at the antenna end position. Figures 6 to 8 The example of exemplifies 1Tx and 2Tx (UL-MIMO and Tx diversity) examples. For reference, in the present disclosure, an antenna terminal may refer to an antenna connector.

[0265] For reference, in Figures 6 to 8 , Figures 11a to 11c and Figures 18 to 21a to Figure 21g, the right triangle represents the PA. The dotted lines, various circles, and the "+" sign shown in the circles shown in the figure are all shown for conceptual illustration. These figures are shown in the accompanying drawings to help understand from a hardware perspective and may not actually be implemented in hardware. For example, the number of layers may represent the number of rows before TPMI is applied. The number of antenna ports may be applied after TPMI is applied. The number of antenna terminals may be applied after the PA. The "+" sign shown in the circle may represent measuring the sum of the outputs of the four PAs. Located to the right of the "+" shown in the circle, the nearest circle represents measuring the MOP as the sum of the transmit powers. The following circle may represent measuring the MPR.

[0266] Figures 6 to 8 An example can be described as follows.

[0267] Figure 6 The example shows an example of a 1Tx terminal:

[0268] -(A-1): 23dBm(PC3)

[0269] -(A-2): 26dBm(PC2)

[0270] Figures 7a to 7c The example describes an example of a 2Tx (UL-MIMO) terminal:

[0271] -For (B-1), 1) 26dBm (PC2): FullPwrMode, 2) 29dBm (PC1.5): FullPwrMode1

[0272] -(B-2):26dBm(PC2):FullPwrMode1

[0273] -(B-3):26dBm(PC2):FullPwrMode2

[0274] Figure 8 The example describes an example of a 2Tx (Tx diversity) terminal:

[0275] -For (C-1), 1) 26dBm (PC2) 2) 29dBm (PC1.5)

[0276] Regarding the above UL-MIMO, according to Layer 1 and Layer 2, based on Fig. 9 and Fig.10 The table definition shown in the example of TPMI.

[0277] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0278] Fig. 9 An example of a precoding matrix for single-layer transmission using two antenna ports according to an embodiment of the present specification is shown. Fig.10 An example of a precoding matrix for two-layer transmission using two antenna ports according to an embodiment of the present specification is shown.

[0279] Fig. 9 The example of φ shows an example of the precoding matrix W for single layer transmission when the UE uses two antenna ports. Fig.10 The example of φ shows an example of a precoding matrix W for two-layer transmission when the UE uses two antenna ports.

[0280] exist Fig. 9 and Fig.10 In the example of , the leftmost TMPI index is the index corresponding to 0 which is the smallest value. It is arranged in ascending order from left to right.

[0281] The MPR of a terminal supporting two-layer UL-MIMO will be described.

[0282] MPR (Maximum Power Reduction) requirements are defined for PC3 terminals, PC2 terminals, and PC1 terminals supporting 2-layer UL-MIMO.

[0283] The MPR of a PC3 terminal supporting two-layer UL-MIMO will be described.

[0284] In case a PC3 terminal supports two-layer UL-MIMO, it may be designated as PC3 in the 'ue_PowerClass' signal information.

[0285] A PC3 terminal can transmit to two antenna ports. In this case, as in the following two examples, an MPR for the sum of the total transmit power in the two antenna connectors is applied. For example, for 2-layer UL-MIMO and 1-layer UL-MIMO, the existing 1Tx PC3 MPR is applied as is:

[0286] - In case of PC3 2-layer UL-MIMO, MPR = PC3_1Tx MPR

[0287] - In case of PC3 1-layer UL-MIMO, MPR = PC3_1Tx MPR

[0288] In case of 1-layer UL-MIMO, the MPR for transmit power at one antenna connector also applies to the existing 1Tx PC3 MPR in the following TPMI:

[0289] -TPMI = 0 or 1 (in Fig. 9 Corresponding to )

[0290] The UE can transmit a signal by switching to one antenna port. In this case, the existing 1Tx PC3 MPR is applied as the MPR for the transmit power in one antenna connector.

[0291] For reference, 1Tx PC3 MPR is defined as shown in Table 6 below.

[0292] [Table 6]

[0293]

[0294] The example of Table 6 shows an example of MPR applied to a UE of 1Tx PC3. For example, for Table 6, see Table 6.2.2-1TS38.101-1V17.6.0 for maximum power reduction (MPR) for power level 3. For reference, in the disclosure of this specification, DFT-s-OFDM may represent discrete Fourier transform spread OFDM (orthogonal frequency division multiplexing). CP-OFDM may represent cyclic prefix OFDM. Pi / 2BPSK may represent Pi / 2 binary phase shift keying. QPSK may represent quadrature phase shift keying. QAM may represent quadrature amplitude modulation.

[0295] In the example of Table 6, Note 1 and Note 2 represent the following.

[0296] Note 1: If the UE indicates that the UE supports the UE feature powerBoosting-pi2BPSK, then IEpowerBoostPi2BPSK is configured to 1 and less than 40% of the time slots of the radio frame are used for UL transmission in bands n40, n41, n77, n78 and n79, it applies to UEs operating in TDD mode with Pi / 2BPSK modulation. The reference power for 0dB MPR is 26dBm.

[0297] Note 2: If IE powerBoostPi2BPSK is set to 0 and more than 40% of the time slots in the radio frame are used for UL transmission in bands n40, n41, n77, n78 and n79, it can be applied to UEs operating in TDD mode in bands other than n40, n41, n77, n78 and n79.

[0298] The MPR of the PC2 terminal supporting two-layer UL-MIMO will be described.

[0299] In case a PC2 terminal supports two-layer UL-MIMO, it is designated as PC2 in the 'ue_PowerClass' signal information.

[0300] The PC2 terminal can transmit to both antenna ports. In this case, as in the following two examples, the MPR for the sum of the total transmit power in the two antenna connectors is applied. For example, for 2-layer UL-MIMO and 1-layer UL-MIMO, the MPR is defined as follows:

[0301] - In case of PC2 2-layer UL-MIMO, MPR = PC2_2Tx_MPR

[0302] - In case of PC2 1-layer UL-MIMO, MPR = PC2_2Tx_MPR

[0303] The PC2 terminal supporting 2-layer UL-MIMO can support FullPwrMode1 in the uplink full power transmission mode.

[0304] In this case, depending on whether 'Tx diversity' is supported, it is defined that the PC2 terminal must satisfy the following MPRs:

[0305] - If 'Tx diversity' is specified, then MPR = PC2_2Tx_MPR

[0306] - If "Tx diversity" is not specified, MPR = PC2_1Tx_MPR

[0307] If 'Tx diversity' is not specified, the terminal must include at least one 26dBm PA to support 26dBm'ue_PowerClass'. For example, the terminal has two PAs (e.g., 26dBm PA+23dBm PA) and can support 'FullPwrMode1' by applying 3dB power backoff to the 26dBm PA. For another example, the terminal has two PAs (e.g., 26dBm PA+26dBm PA) and can support 'FullPwrMode1' by applying 3dB power backoff to each of the two 26dBm PAs.

[0308] If the PC2 terminal supports two-layer UL-MIMO during uplink full power transmission mode, support 'FullPwrMode' or 'FullPwrMode2', then PC2_1Tx_MPR must be satisfied.

[0309] If the PC2 terminal supports two-layer UL-MIMO switching to one antenna port and transmits a signal, 'FullPwrMode' or 'FullPwrMode2' may be specified. In this case, the existing 1Tx PC2 MPR should be applied as is to the MPR for the transmit power of at least one antenna connector.

[0310] -MPR = PC2_1Tx_MPR

[0311] In Table 7, the MPR for 1Tx PC2 terminal is defined as an example, and in Table 8, the MPR for 2Tx PC2 terminal is defined as an example.

[0312] [Table 7]

[0313]

[0314] The example of Table 7 shows an example of MPR applied to UE of 1Tx PC2. For example, for Table 7, see Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 in TS 38.101-1 V17.6.0

[0315] [Table 8]

[0316]

[0317] The example of Table 8 shows an example of MPR applied to UE of 2Tx PC2. For example, for Table 8, see Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx in TS 38.101-1 V17.6.0.

[0318] The MPR of a PC1.5 terminal supporting two-layer UL-MIMO will be described.

[0319] In the case of a PC1.5 terminal supporting two-layer UL-MIMO, it is designated as PC1.5 in the signal information of ue_PowerClass.

[0320] The terminal can transmit to two antenna ports. In this case, as in the following two examples, the MPR for the sum of the total transmit power in the two antenna connectors is applied. For example, for 2-layer UL-MIMO and 1-layer UL-MIMO, 2Tx (26dBm+26dBm) is assumed, and the MPR is defined as follows:

[0321] - In the case of PC1.5 terminals supporting 2-layer UL-MIMO, MPR = PC1.5_2Tx_MPR

[0322] - When PC1.5 terminal supports 1 layer UL-MIMO, MPR = PC1.5_2Tx_MPR

[0323] In case the terminal switches to one antenna port and transmits the antenna port, it has not been taken into account until now.

[0324] Here, 2Tx PC1.5 MPR is defined as an example in Table 9 and Table 10 according to the antenna isolation value.

[0325] The example in Table 9 is an example of MPR considering an antenna isolation of 10 dB. Table 10 is an example of MPR considering an antenna isolation of 20 dB or more. Generally, an antenna isolation of 10 dB is assumed for handheld UEs and vehicle UEs, and an antenna isolation of 20 dB or more is assumed for fixed wireless access (FWA) / customer premises equipment (CPE).

[0326] [Table 9]

[0327]

[0328] The example of Table 9 is an example of MPR for 2Tx PC1.5 UE based on 10dB antenna isolation. For example, for Table 9, see Table 6.2D.2-2 Maximum Power Reduction (MPR) for Power Level 1.5 with Dual Tx in TS38.101-1V17.6.0.

[0329] [Table 10]

[0330]

[0331] The example in Table 10 is an example of MPR for 2Tx PC1.5 UE based on antenna isolation of 20dB or greater. For example, for Table 10, see Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx in TS38.101-1V17.6.0.

[0332] 1-2. Transmission requirements of FR1 4Tx terminals

[0333] The transmission requirements (eg, RF requirements related to transmission) of the FR1 4Tx terminal will be described. For example, the transmission requirements of the FR1 4Tx terminal may include MPR.

[0334] In order to further improve the uplink coverage compared to the uplink coverage of the existing 2Tx terminal, a terminal with four transmit antennas will be introduced.

[0335] Regarding 4Tx, the transmission PA structure of the terminal may be as shown in the following cases 1 to 3. For example, based on the 23dBm PA and 26dBm PA considered for the current implementation, the following combination may be used as the terminal transmission PA structure for 4Tx:

[0336] - Case 1: 23dBm+23dBm+23dBm+23dBm

[0337] - Case 2: 26dBm+26dBm+23dBm+23dBm

[0338] - Case 3: 26dBm+26dBm+26dBm+26dBm

[0339] Figures 11a to 11c The example shows the PA structure of the terminal for case 1, case 2 and case 3.

[0340] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0341] Figures 11a to 11c An example of a structure for transmitting a 4Tx terminal according to an embodiment of the present specification is illustrated.

[0342] Figures 11a to 11c This is an example of a structure for transmission of 4Tx terminals.

[0343] As described above, Case 1 is an example of a case where all four PAs are 23dBm PAs. Case 2 is an example of a case where two PAs are 26dBm PAs and two PAs are 23dBm PAs. In Case 2, the first two PAs are 26dBm PAs. The structure where the 26dBm PAs and the 23dBm PAs are arranged is only an example, and the positions where the respective PAs are arranged may be different from Figures 11a to 11c Case 3 is an example of a case where all four PAs are 26dBm PAs.

[0344] Examples of terminal output power levels that can be supported by the example of case 1, the example of case 2, and the example of case 3 are as follows:

[0345] The PCs that can be supported by Case 1 may include, for example, PCs based on 23dBm, 26dBm, and 29dBm:

[0346] -23dBm(PC3)=(23-6)+(23-6)+(23-6)+(23-6)dBm. Here, the UE can perform 6dB power backoff for each 23dBm PA;

[0347] -26dBm(PC2)=(23-3)+(23-3)+(23-3)+(23-3)dBm. Here, the UE can perform 3dB power backoff for each 23dBm PA;

[0348] -29dBm(PC1.5)=23+23+23+23dBm Here, the UE does not apply power backoff for each 23dBm PA.

[0349] The PCs that can be supported by case 2 may include, for example, PCs based on 23dBm, 26dBm, and 29dBm:

[0350] -23dBm(PC3)=(23-6)+(23-6)+(26-9)+(26-9)dBm. Here, the UE can perform 6dB power backoff for each of the 23dBm PAs and 9dB power backoff for each of the 26dBm PAs;

[0351] -26dBm(PC2)=(23-3)+(23-3)+(26-6)+(26-6)dBm. Here, the UE can perform 3dB power backoff for each of the 23dBm PAs and 6dB power backoff for each of the 26dBm PAs;

[0352] -29dBm(PC1.5)=(23-0)+(23-0)+(26-3)+(26-3)dBm. Here, the UE can perform 3dB power backoff for each of the 26dBm PAs, but not perform power backoff for each of the 23dBm PAs;

[0353] -30.8dBm=(23-0)+(23-0)+(26-0)+(26-0)dBm. Here, the UE may not perform power backoff for the 23dBm PA and the 26dBm PA. For an output of 30.8dBm, the existing PC1 (31dBm) may be applied, or a new PC (eg, PC1.1) may be defined.

[0354] The PCs that can be supported by case 3 (e.g., 4x26 dBm) may include, for example, PCs based on 23dBm, 26dBm, and 29dBm:

[0355] -23dBm(PC3)=(26-9)+(26-9)+(26-9)+(26-9)dBm. Here, the UE can perform 9dB power backoff for each of the 26dBm PAs;

[0356] -26dBm(PC2)=(26-6)+(26-6)+(26-6)+(26-6)dBm. Here, the UE can perform 6dB power backoff for each of the 26dBm PAs;

[0357] -29dBm(PC1.5)=(26-3)+(26-3)+(26-3)+(26-3)dBm. Here, the UE can perform 3dB power backoff for each of the 26dBm PAs;

[0358] -32dBm = (26-0) + (26-0) + (26-0) + (26-0) dBm. Here, the UE does not perform power backoff for all 26dBm PAs. For 32dBm output, a new PC may be defined. For example, PC0.9 may be defined.

[0359] As described in the examples of Case 1 to Case 3, the terminal may or may not perform fallback for PA based on the structure of the terminal and the PC to be supported. Therefore, the terminal may support 'ul_PowerClass' corresponding to each PC. The terminal may report 'ul_PowerClass' to the network.

[0360] Examples of the precoding matrix W corresponding to the TPMI index and the TMPI indexes corresponding to the 1st layer, 2nd layer, 3rd layer and 4th layer for 4 antenna ports are as follows: Figures 12 to 15 as shown in the example.

[0361] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0362] Fig.12 An example of a precoding matrix for layer 1 transmission using four antenna ports according to an embodiment of the present specification is shown.

[0363] Fig.13 An example of a precoding matrix for two-layer transmission using four antenna ports according to an embodiment of the present specification is shown.

[0364] Fig.14 An example of a precoding matrix for 3-layer transmission using four antenna ports according to an embodiment of the present specification is shown.

[0365] Fig.15 An example of a precoding matrix for 4-layer transmission using four antenna ports according to an embodiment of the present specification is shown.

[0366] Fig.12 The example of φ shows an example of the precoding matrix W for 1-layer transmission when the UE uses four antenna ports. Fig.13 The example of φ shows an example of the precoding matrix W for two-layer transmission when the UE uses four antenna ports. Fig.14 The example of φ shows an example of the precoding matrix W for 3-layer transmission when the UE uses four antenna ports. Fig.15 The example of φ shows an example of the precoding matrix W for 4-layer transmission when the UE uses four antenna ports.

[0367] exist Figures 12 to 15 In the example of , the leftmost TMPI index is the index corresponding to 0 which is the smallest value. It is arranged in ascending order from left to right.

[0368] A 4Tx terminal may support UL-MIMO. In this case, the uplink full power transmission mode may be configured for the UE. For example, 'FullPwrMode1', 'FullPwrMode2' or 'FullPwrMode' may be set for the terminal. Based on a 4Tx terminal, the following may be applied:

[0369] - 'FullPwrMode' terminal: In the case of 4Tx terminal, the 'FullPwrMode' terminal is a terminal in which the transmit power of each antenna connector meets the corresponding 'ue_PowerClass';

[0370] - 'FullPwrMode1' terminal: In the case of 4Tx terminal, the 'FullPwrMode1' terminal is a terminal in which the sum of the transmit powers of all antenna connectors satisfies the corresponding 'ue_PowerClass';

[0371] - 'FullPwrMode2' terminal: In the case of 4Tx terminal, the 'FullPwrMode2' terminal is a terminal in which the transmit power of one antenna in all antenna connections meets the corresponding 'ue_PowerClass';

[0372] - 'FullPwrMode3' terminal: In the case of 4Tx terminal, the 'FullPwrMode3' terminal is a terminal in which the sum of the transmit powers of the two antenna connectors satisfies the corresponding 'ue_PowerClass'.

[0373] - 'FullPwrMode4' terminal: In the case of 4Tx terminal, a 'FullPwrMode4' terminal is a terminal in which the sum of the transmit powers of the two antenna connectors in two pairs satisfies the corresponding 'ue_PowerClass'.

[0374] MPR and UL-MIMO in a case where FR1 4Tx UE supports PC3 (23dBm) will be described.

[0375] For each of the examples of Case 1 to Case 3, MPR and UL-MIMO when the UE supports PC3 (23 dBm) will be described.

[0376] In case 1 (PA1, PA2, PA3, PA4 are all 23dBm PAs), PC3 (23dBm) UE can be designated as PC3 in the 'ue_PowerClass' signal information.

[0377] When the UE transmits through 4 antenna ports, the MPR can be applied to the sum of the total transmit power in the 4 antenna connectors. In this case, for 4 / 3 / 2 / 1 layer UL-MIMO, it is recommended to apply the same MPR as the existing 1Tx PC3 MPR:

[0378] - If PC3 UE supports 4 / 3 / 2 / 1 layer UL-MIMO, the MPR may be the regular PC3_1 Tx MPR (e.g., Maximum Power Reduction (MPR) for Power Class 3 of Table 6.2.2-1 [TS38.101-1 V17.6.0]).

[0379] For UE, UL-MIMO UE full power mode can be configured. In this case, the following interpretation can be applied:

[0380] - In the case of 'FullPwrMode' or 'FullPwrMode2', for a 4Tx terminal, the transmit power of 1 antenna connector may be 'ue_PowerClass' = PC3. In this case, as the MPR for the UE, the existing 1Tx PC3 MPR may be applied as is. For example, the MPR may be the same as the conventional PC3_1Tx MPR (e.g., Table 6.2.2-1 Maximum Power Reduction (MPR) for Power Class 3 [TS38.101-1 V17.6.0]).

[0381] - In the case of 'FullPwrMode3' or 'FullPwrMode4', for a 4Tx terminal, the sum of the transmit powers of the two antenna connections may be 'ue_PowerClass' = PC3. In this case, the existing 1Tx PC3 MPR may be applied as the MPR for the terminal. For example, the MPR may be the same as the conventional PC3_1Tx MPR (e.g., Table 6.2.2-1 Maximum Power Reduction (MPR) for Power Class 3 [TS38.101-1 V17.6.0]).

[0382] - In the case of 'FullPwrMode1', for a 4Tx terminal, the sum of the transmit powers of the four antenna connections may be 'ue_PowerClass' = PC3. In this case, the existing 1Tx PC3 MPR may be applied as the MPR for the terminal as is. For example, the MPR may be the same as the conventional PC3_1Tx MPR (e.g., Table 6.2.2-1 Maximum Power Reduction (MPR) for Power Class 3 [TS38.101-1 V17.6.0]).

[0383] A FR1 4Tx UE supporting PC3 (23dBm) and UL-MIMO can switch to one antenna port to transmit the signal. In this case, the following examples can be applied:

[0384] - If the UE specifies 'txDiversity-r16', the sum of the transmit powers at the two antenna connection ends may be 'ue_PowerClass' = PC3. In this case, the MPR may be the same as the existing 1Tx PC3_1Tx MPR (e.g., Table 6.2.2-1 Maximum Power Reduction (MPR) for Power Class 3 [TS38.101-1V17.6.0]). For reference, in the disclosure of this specification, the object specifying 'txDiversity-r16' may be the UE.

[0385] - If 'txDiversity-r16' is not specified, the transmit power at one antenna connector may be 'ue_PowerClass' = PC3. In this case, the MPR for it may be the same as the existing 1Tx PC3_1Tx MPR (e.g., Table 6.2.2-1 Maximum Power Reduction (MPR) for Power Class 3 [TS38.101-1 V17.6.0]).

[0386] In case 2 (PA1 and PA2 are 26dBm PAs, and PA3 and PA4 are 23dBm PAs), the MPR may be defined in the same manner as in case 1.

[0387] In case 3 (PA1, PA2, PA3 and PA4 are all 26dBm PAs), the MPR can be defined in the same way as in case 1.

[0388] MPR and UL-MIMO for FR1 4Tx UE supporting PC2 (26dBm) will be described.

[0389] For each example of Case 1 to Case 3, MPR and UL-MIMO when the UE supports PC2 (26 dBm) are described.

[0390] In case 1 (PA1, PA2, PA3, PA4 all 23dBm), PC2 (26dBm) UE can be designated as PC2 in the 'ue_PowerClass' signal information.

[0391] When the UE transmits signals based on four antenna ports, the MPR can be applied to the sum of the total transmit powers at the four antenna connectors. In this case, for 4 / 3 / 2 / 1 layer UL-MIMO, the existing 2Tx PC2 MPR can be used as the MPR. This is because the existing 2Tx PC2 MPR is standardized based on 23dBm+23dBm, and the 4Tx case 1PC2 can be assumed to be (20dBm+20dBm)+(20dBm+20dBm)=23dBm+23dBm. For reference, in the case of existing 2Tx PC3 UL-MIMO, it is assumed that (23dBm-3dB power backoff)+(23dBm-3dB power backoff)=(20dBm+20dBm)=23dBm, and PC3_1Tx MPR is applied. The following description applies:

[0392] - If PC2 UE supports 4 / 3 / 2 / 1 layer UL-MIMO, the MPR may be the same as the regular PC2_2Tx MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0393] When setting UL-MIMOue full power mode, the following description may apply:

[0394] - In the case of 'FullPwrMode3' or 'FullPwrMode4', for a 4Tx terminal, the sum of the transmit powers of the two antenna connections may be 'ue_PowerClass' = PC2. In this case, the existing 2Tx PC2 MPR may be applied as is to the MPR for the terminal. For example, the MPR may be the same as the conventional PC2_2Tx MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0395] - In the case of 'FullPwrMode1', for a 4Tx terminal, the sum of the transmit powers of the four antenna connections may be 'ue_PowerClass' = PC2. In this case, the existing 2Tx PC2 MPR may be applied as is to the MPR for the terminal. For example, the MPR may be the same as the conventional PC2_2Tx MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0396] In case 1, a FR1 4Tx UE supporting PC2 (26dBm) and UL-MIMO can switch to one antenna port to transmit the signal. In this case, the following examples can be applied:

[0397] - If 'txDiversity-r16' is specified, the sum of the transmit powers at both antenna connections may be 'ue_PowerClass' = PC2. In this case, the MPR may be the same as the existing 2Tx PC2 MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0398] Alternatively, a terminal capability for the number of antennas supporting tx diversity may be added. For example, the capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[0399] -'txDiversity-r18' = 2, 3, 4; or

[0400] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0401] If 'txDiversity-r18' is newly defined, the following description may apply. If the terminal switches to one antenna port and transmits (without UL-MIMO), the following description may apply according to the following 'txDiversity-r18' capability of the terminal:

[0402] - In the case of 'txDiversity-r18'=2 (or 'txDiversity2-r18'), the sum of the transmit powers at the two antenna connectors may satisfy the corresponding 'ue_PowerClass';

[0403] - In case of 'txDiversity-r18'=3 (or 'txDiversity3-r18'), the sum of the transmit powers at the three antenna connectors may satisfy the corresponding 'ue_PowerClass'; or

[0404] - In the case of 'txDiversity-r18'=4 (or 'txDiversity4-r18'), the sum of the transmit powers at the four antenna connectors may satisfy the corresponding 'ue_PowerClass'.

[0405] The terminal may specify 'txDiversity-r18=4'. In this case, the sum of the transmit powers at the four antenna connectors may be 'ue_PowerClass'=PC2. For reference, in the disclosure of this specification, both the antenna end and the antenna connector may represent the antenna connector. In this case, the MPR may be the same as the existing 2Tx PC2 MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1V17.6.0]).

[0406] In case 2 (PA1, PA2 are 26dBm PAs, PA3, PA4 are 23dBm), PC2 (26dBm) UE can be designated as PC2 in the 'ue_PowerClass' signal information.

[0407] When the UE transmits through 4 antenna ports, the MPR may be applied to the sum of the total transmit power in the 4 antenna connectors. In this case, for 4 / 3 / 2 / 1 layer UL-MIMO, it is proposed to apply the existing 2Tx PC2 MPR as is. The following interpretation applies:

[0408] - If PC2 UE supports 4 / 3 / 2 / 1 layer UL-MIMO, the MPR may be the same as the regular PC2_2Tx MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0409] For UE, when UL-MIMO UE full power mode is configured, the following description can be applied:

[0410] - In the case of 'FullPwrMode2', for a 4Tx terminal, the transmit power of one antenna connector may be 'ue_PowerClass' = PC2. In this case, as the MPR, the existing 1Tx PC2 MPR may be applied as is. For example, the MPR may be the same as the conventional PC2_1Tx MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1 V17.6.0]).

[0411] - In the case of 'FullPwrMode3' or 'FullPwrMode4', for a 4Tx terminal, the sum of the transmit powers of the two antenna connectors may be 'ue_PowerClass' = PC2. In this case, as the MPR, the existing 2Tx PC2 MPR may be applied as is. For example, the MPR may be the same as the conventional PC2_2Tx MPR ((e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0412] - In the case of 'FullPwrMode1', for a 4Tx terminal, the sum of the transmit powers of the 4 antenna connectors may be 'ue_PowerClass' = PC2. In this case, as the MPR, the existing 2Tx PC2 MPR may be applied as is. For example, the MPR may be the same as the conventional PC2_2Tx MPR ((e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0413] In case 2, a FR1 4Tx UE supporting PC2 (26dBm) and UL-MIMO can switch to one antenna port and transmit a signal. In this case, the following examples can be applied:

[0414] - If 'txDiversity-r16' is specified, the sum of the transmit powers at the two antenna connectors may be 'ue_PowerClass' = PC2. In this case, the MPR may be the same as the existing 2Tx PC2 MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0415] - If 'txDiversity-r16' is not specified, the transmit power of one antenna connector may be 'ue_PowerClass' = PC2. In this case, the MPR may be the same as the existing 1Tx PC2 MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1 V17.6.0]).

[0416] Alternatively, a terminal capability for the number of antennas supporting tx diversity may be added. For example, the capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[0417] -'txDiversity-r18' = 2, 3, 4; or

[0418] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0419] If 'txDiversity-r18' is newly defined, the following description may apply. If the terminal switches to one antenna port and transmits (without UL-MIMO), the following description may apply according to the following 'txDiversity-r18' capability of the terminal:

[0420] - In the case of 'txDiversity-r18'=2 (or 'txDiversity2-r18'), the sum of the transmit powers at the two antenna connectors may satisfy the corresponding 'ue_PowerClass';

[0421] - In case of 'txDiversity-r18'=3 (or 'txDiversity3-r18'), the sum of the transmit powers at the three antenna connectors may satisfy the corresponding 'ue_PowerClass'; or

[0422] - In the case of 'txDiversity-r18'=4 (or 'txDiversity4-r18'), the sum of the transmit powers at the four antenna connectors may satisfy the corresponding 'ue_PowerClass'.

[0423] The terminal may specify 'txDiversity-r18=4'. In this case, the sum of the transmit powers at the four antenna connectors may be 'ue_PowerClass'=PC2. In this case, the MPR may be the same as the existing 2Tx PC2 MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0424] The terminal may not specify 'txDiversity-r18=4'. In this case, the sum of the transmit power at one antenna connector may be 'ue_PowerClass'=PC2. In this case, the MPR may be the same as the existing 1Tx PC2 MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1V17.6.0]).

[0425] In case 3 (PA1, PA2, PA3, PA4 are all 26dBm PAs), PC2 (26dBm) UE can be designated as PC2 in the 'ue_PowerClass' signal information.

[0426] When the UE transmits through 4 antenna ports, the MPR may be applied to the sum of the total transmit power in the 4 antenna connectors. In this case, for 4 / 3 / 2 / 1 layer UL-MIMO, it is proposed to apply the existing 2Tx PC2 MPR as is. The following interpretation applies:

[0427] - If PC2 UE supports 4 / 3 / 2 / 1 layer UL-MIMO, the MPR may be the same as the regular PC2_2Tx MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0428] For UE, when UL-MIMO UE full power mode is configured, the following description can be applied:

[0429] - In the case of 'FullPwrMode' or 'FullPwrMode2', for a 4Tx terminal, the transmit power of one antenna connector may be 'ue_PowerClass' = PC2. In this case, as the MPR, the existing 1TxPC2 MPR may be applied as is. For example, the MPR may be the same as the conventional PC2_1Tx MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1V17.6.0]).

[0430] - In the case of 'FullPwrMode3' or 'FullPwrMode3', for a 4Tx terminal, the sum of the transmit powers of the two antenna connectors may be 'ue_PowerClass' = PC2. In this case, as the MPR, the existing 2Tx PC2 MPR may be applied as is. For example, the MPR may be the same as the conventional PC2_2Tx MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0431] - In the case of 'FullPwrMode1', the sum of the transmit powers of the 4 antenna connectors for a 4Tx terminal may be 'ue_PowerClass' = PC2. In this case, as the MPR, the existing 2Tx PC2 MPR may be applied as is. For example, the MPR may be the same as the conventional PC2_2Tx MPR ((e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0432] In case 3, a FR1 4Tx UE supporting PC2 (26dBm) and UL-MIMO can switch to one antenna port and transmit a signal. In this case, the following examples can be applied:

[0433] - If 'txDiversity-r16' is specified, the sum of the transmit powers at the two antenna connectors may be 'ue_PowerClass' = PC2. In this case, the MPR may be the same as the existing 2Tx PC2 MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0434] - If 'txDiversity-r16' is not specified, the transmit power of one antenna connector may be 'ue_PowerClass' = PC2. In this case, the MPR may be the same as the existing 1Tx PC2 MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1 V17.6.0]).

[0435] Alternatively, a new UE capability for the number of antennas supporting tx diversity may be added. As an example, this capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[0436] -'txDiversity-r18' = 2, 3, 4; or

[0437] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0438] If 'txDiversity-r18' is newly defined, the following description may apply. If the terminal switches to one antenna port and transmits (without UL-MIMO), the following description may apply according to the following 'txDiversity-r18' capability of the terminal:

[0439] - In the case of 'txDiversity-r18'=2 (or 'txDiversity2-r18'), the sum of the transmit powers at the two antenna connectors may satisfy the corresponding 'ue_PowerClass';

[0440] - In case of 'txDiversity-r18'=3 (or 'txDiversity3-r18'), the sum of the transmit powers at the three antenna connectors may satisfy the corresponding 'ue_PowerClass'; or

[0441] - In the case of 'txDiversity-r18'=4 (or 'txDiversity4-r18'), the sum of the transmit powers at the four antenna connectors may satisfy the corresponding 'ue_PowerClass'.

[0442] The terminal may specify 'txDiversity-r18=4'. In this case, the sum of the transmit powers at the four antenna connectors may be 'ue_PowerClass'=PC2. In this case, the MPR may be the same as the existing 2Tx PC2 MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0443] The terminal may not specify 'txDiversity-r18=4'. In this case, the sum of the transmit power at one antenna connector may be 'ue_PowerClass'=PC2. In this case, the MPR may be the same as the existing 1Tx PC2 MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1V17.6.0]).

[0444] MPR and UL-MIMO when FR1 4Tx UE supports PC1.5 (29dBm) will be described.

[0445] For each of the examples of Case 1 to Case 3, MPR and UL-MIMO when the UE supports PC1.5 (29 dBm) will be described.

[0446] In case 1 (PA1, PA2, PA3, PA4 all 23dBm), PC1.5 (29dBm) UE can be designated as PC1.5 in the 'ue_PowerClass' signal information.

[0447] When the UE transmits through 4 antenna ports, the MPR can be applied to the sum of the total transmit power in the 4 antenna connectors. In this case, for 4 / 3 / 2 / 1 layer UL-MIMO, the following description applies:

[0448] i) For MPR, the existing 2Tx PC1.5 MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Level 1.5 with Dual Tx [TS38.101-1V17.6.0]) can be applied as is. This is because the existing 2Tx PC1.5 MPR is standardized based on 26dBm+26dBm, and the 4Tx case 1PC1.5 can be assumed to be (23dBm+23dBm)+(23dBm+23dBm)=26dBm+26dBm; or

[0449] ii) For MPR, it is recommended to apply the new 4Tx PC1.5 MPR (eg, Table 11 and Table 12). Specific MPR values ​​can refer to the examples in Table 11 and Table 12 below.

[0450] -If the PC1.5 UE supports 4 / 3 / 2 / 1 layer UL-MIMO, the MPR is the same as the conventional PC1.5_2Tx MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]), or the MPR is the PC1.5_4Tx MPR described in the examples of Tables 11 and 12 below.

[0451] PC1.5_4Tx MPR may be the same as the examples in Table 11 and Table 12. For example, in the case of a 23dBm+23dBm+23dBm+23dBm PA structure, Table 11 or Table 12 may be applied according to the antenna isolation. For example, in the case of a terminal with an antenna isolation of 10dB, the MPR based on Table 11 may be applied. For a terminal with an antenna isolation of 20dB or more, the MPR based on Table 12 may be applied.

[0452] [Table 11]

[0453]

[0454] The example of Table 11 is an example of MPR for 4Tx PC1.5 UE. When the antenna isolation is 10dB, the example of Table 11 can be applied. For example, when the power level of the 4Tx terminal is 1.5 and the antenna isolation is 10dB, the MPR value according to the example of Table 11 can be applied.

[0455] [Table 12]

[0456]

[0457] The example of Table 12 is an example of MPR for 4Tx PC1.5 UE. When the antenna isolation is 20dB or higher, the example of Table 12 can be applied. For example, when the power level of the 4Tx terminal is 1.5 and the antenna isolation is 20dB, the MPR value according to the example of Table 12 can be applied.

[0458] In addition, in Tables 11 and 12, MPR considering an additional implementation margin α may be proposed. Here, α may be ±0 to ±3.0. As an example, in α=±0, ±0.5, ±1.0, ±1.5, ±2.0, ±2.5, ±3.0, Tables 11 and 12 correspond to the case of α=0.

[0459] For reference, the MPR of Table 11 and the MPR of Table 12 are defined according to the simulation performed in the following example. For example, in the simulation results, the MPR of Table 11 and the MPR of Table 12 are derived by considering the realization margin of the maximum MPR value in each edge, inner, and outer parts. Here, the simulation can be based on Fig.16 Examples of Fig.17 Examples and simulations of Tables 13 to 17.

[0460] For example, when the antenna isolation is 10 dB, Table 14 may be the MPR based on CP-OFDM, and Table 15 may be the MPR based on DFT-s-OFDM.

[0461] When the antenna isolation is 20 dB or greater, Table 15 may be the MPR based on CP-OFDM, and Table 17 may be the MPR based on DFT-s-OFDM.

[0462] In the simulations to derive the MPR, the simulation parameters assumed were:

[0463] - Channel bandwidth = 20MHz

[0464] - Subcarrier spacing (SCS) = 15kHz

[0465] - Antenna isolation = 10dB, 20dB

[0466] - Front End Path Loss (FEPL) (= Post-PA Loss) = 4dB

[0467] -RB_start: The starting position of the allocated resource block (RB) (see Table 14, Table 15, Table 16, Table 17)

[0468] -L_CRB: Number of allocated RBs (see Table 14, Table 15, Table 16, Table 17)

[0469] Tables 14, 15, 16, and 17 are examples of MPR values ​​derived by considering the effects of antenna isolation and FEPL on reverse intermodulation (IMD). RIMD affects the error vector magnitude (EVM), and a larger MPR may be required for 2Tx MPR compared to 1Tx MPR. For example, when antenna isolation = 10dB and FEPL = 4dB, the reverse IMD applied from PA1 to PA2 is Fig.16 The same example.

[0470] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0471] Fig.16 is an example of reverse IMD for 2Tx according to an embodiment of the present specification.

[0472] Fig.16 is an example of reverse IMD for 2Tx when the antenna isolation is 10dB. Fig.16 In the example of FIG. 1 , an example of reverse IMD applied from PA1 to PA2 is shown. The reverse IMD applied from PA2 to PA1 can also be Fig.16 The same happens in the example. Fig.16 The inverse IMD of the example can be expressed by the following formula:

[0473] -Reverse IMD = X-Antenna_Isolation-2*FEPL (dBm) = 23-10-2*4 = 5 (dBm)

[0474] Fig.16 The example of is an example of reverse IMD in the case of 2Tx. The reverse IMD in the case of 4Tx is as follows.

[0475] In the case of 4Tx (PA1=PA2=PA3=PA4=X(dBm)), the maximum outputs of PA1 to PA4 can all be equal to X dBm. In this case, the reverse IMD applied from {PA2, PA3, PA4} to PA1 is as follows. The reverse IMD applied to PA2, PA3, and PA4 can also be the same as the reverse IMD applied to PA1.

[0476] Reverse IMD = X-Antenna_Isolation-2*FEPL+10*log10(3)(dBm)=23-10-2*4+4.77=9.77(dBm)

[0477] The reverse IMD of 4Tx is larger compared to the reverse IMD of 2Tx. Therefore, a larger EVM is applied and thus a larger MPR may be required.

[0478] As an example, EVM according to total output power (total Tx power) by reverse IMD may be assumed as shown in the example of the following Table 13. Here, among the reverse IMDs, the 3rd order RIMD may be the most important value (eg, the RIMD value having the greatest influence).

[0479] [Table 13]

[0480]

[0481] An example of Table 15 may be the EVM contribution due to third order RIMD versus output power and antenna isolation versus output power and antenna isolation.

[0482] [Table 14]

[0483]

[0484] The example of Table 14 may represent an MPR result value based on CP-OFDM. For example, when the antenna isolation is 10 dB, CP-OFDM is used, and the UE is a 4Tx PC1.5 UE, the MPR value may be derived based on the MPR result of Table 14.

[0485] In the example of Table 14, edge, inner, and outer indicate the positions to which RBs are allocated. In the example of Table 14, the maximum value is derived according to the combination of the position of the allocated RB (e.g., edge, inner, outer), the start time of the RB, the length of the continuous RB, the LCRB, and the modulation (e.g., QPSK, 16QAM, 64QAM, 256QAM). The derived maximum value is highlighted in the example of Table 14. The derived maximum value is the MPR result value based on CP-OFDM. These values ​​can be used to define the MPR value according to the above Table 11.

[0486] [Table 15]

[0487]

[0488] The example in Table 15 may represent an MPR result value based on DFT-s-OFDM. For example, when the antenna isolation is 10 dB, DFT-s-OFDM is used, and the UE is a 4Tx PC1.5 UE, the MPR value may be derived based on the MPR result in Table 15.

[0489] In the example of Table 15, edge, inner, and outer represent the positions to which RBs are allocated. In the example of Table 15, the maximum value is derived based on the combination of the position of the allocated RB (e.g., edge, inner, outer), the start time of the RB, the length of the continuous RB, the LCRB, and the modulation (e.g., QPSK, 16QAM, 64QAM, 256QAM). The derived maximum value is highlighted in the example in Table 15. The derived maximum value is the MPR result value based on DFT-s-OFDM. These values ​​can be used to define the MPR value according to the above Table 11.

[0490] [Table 16]

[0491]

[0492] The example of Table 16 may represent an MPR result value based on CP-OFDM. For example, when the antenna isolation is 20 dB or greater, CP-OFDM is used, and the UE is a 4Tx PC1.5 UE, the MPR value may be derived based on the MPR result of Table 16.

[0493] In the example of Table 16, edge, inner, and outer indicate the positions to which RBs are allocated. In the example of Table 16, the maximum value is derived according to the combination of the position of the allocated RB (e.g., edge, inner, outer), the start time of the RB, the length of the continuous RB, the LCRB, and the modulation (e.g., QPSK, 16QAM, 64QAM, 256QAM). The derived maximum value is highlighted in the example of Table 16. The derived maximum value is the MPR result value based on CP-OFDM. These values ​​can be used to define the MPR value according to the above Table 12.

[0494] [Table 17]

[0495]

[0496] The example of Table 17 may represent an MPR result value based on DFT-s-OFDM. For example, when the antenna isolation is 20 dB or greater, DFT-s-OFDM is used, and the UE is a 4Tx PC1.5 UE, the MPR value may be derived based on the MPR result of Table 17.

[0497] In the example of Table 17, edge, inner, and outer indicate the positions to which RBs are allocated. In the example of Table 17, the maximum value is derived according to the combination of the position of the allocated RB (e.g., edge, inner, outer), the start time of the RB, the length of the continuous RB, the LCRB, and the modulation (e.g., QPSK, 16QAM, 64QAM, 256QAM). The derived maximum value is highlighted in the example of Table 17. The derived maximum value is the MPR result value based on DFT-s-OFDM. These values ​​can be used to define the MPR value according to the above Table 11.

[0498] For reference, in the examples of Tables 12 to 17, Edge indicates edge RB allocation, External indicates external RB allocation, and Internal indicates internal RB allocation.

[0499] For edge, internal and external, please refer to 38.101-1V17.6.0.

[0500] The following parameters can be defined to specify the valid RB allocation range for external RB allocation and internal RB allocation:

[0501] N RB N represents the maximum number of RBs for a given channel bandwidth and SCS. N can be defined as shown in Table 18 below RB .

[0502] [Table 18]

[0503]

[0504] The example of Table 18 includes N according to SCS of 15 kHz, 30 kHz, and 60 kHz and channel bandwidth of 5 MHz to 100 MHz. RB .

[0505] RB Start,Low It can be defined as follows. RB Start,Low =max(1, floor(L CRB / 2)). Here, L CRB It may be a transmission bandwidth indicating the length of continuous resource block allocation indicated in resource block units. max() represents the maximum term among all parameters, and floor(x) represents the maximum integer less than or equal to x.

[0506] RB Start,High It can be defined as follows. RB Start,High =N RB -RB Start,Low -L CRB .

[0507] An RB assignment is an internal RB assignment if the following two conditions are met:

[0508] RB Start,Low ≤RB Start ≤RB Start,High , and L CRB ≤ceil(N RB / 2)

[0509] where ceil(x) is the smallest integer greater than or equal to x.

[0510] Edge RB allocation means allocating RBs as 2 RBs or less. CRB Assigned to the lowest or highest edge of the channel.

[0511] All other allocations except inner RB assignments or edge RB assignments are outer RB assignments.

[0512] The MPR according to the examples of Tables 14, 15, 15 and 17 are error vector magnitude (EVM), adjacent channel leakage ratio (ACLR), spectrum emission mask (SEM), spurious emission (SE), in-band emission (IBE)) are values ​​corresponding to meeting all power back-offs.

[0513] For example, Fig.17 is an example of power spectral density (PSD) for the case where RB_start=9 and L_CRB=20 for 16QAM.

[0514] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0515] Fig.17 is an example of a PSD used to derive an MSD value according to an embodiment of the present specification.

[0516] Fig.17 The example of shows the power spectral density (PSD) for the case of RB_start=9 and L_CRB=20 for 16QAM. Fig.17 In the example of , PSD is compared with SEM, SE, and IBE. Fig.17 The example is an example when DFT-s-OFDM is used.

[0517] Fig.17 The example in shows an example of a PSD that meets the ACLR requirement with a margin of 3.95 dB compared to the standard, meets the SEM requirement with a margin of 4.1 dB compared to the standard, meets the SE requirement with a margin of 3.01 dB compared to the standard, and meets the IBE requirement with a margin of 7.51 dB compared to the standard.

[0518] As described above, the MPR of Table 11 and the MPR of Table 12 are defined as simulated as shown in the following example. For example, in the simulation results, the MPR in Table 11 and the MPR in Table 12 are derived considering the realization margin of the maximum MPR value in each edge, inner, and outer parts. The simulation can be based on Fig.16 Examples of Fig.17 Examples and simulations of Tables 13 to 17.

[0519] The MPR value according to Table 11 and Table 12 is a value corresponding to the power backoff that satisfies EVM, ACLR, SEM, SE and IBE, such as Fig.17 For reference, Fig.17 The example is only illustrated in the case of RB_start=9 and L_CRB=20 of 16QAM, but this is only an example. In order to derive the MPR value according to the MPR of Table 11 and Table 12, the power backoff is derived, where the PSD according to all RB allocations and all modulation combinations satisfies EVM, ACLR, SEM, SE and IBE.

[0520] For UE, when UL-MIMO UE full power mode is configured, the following description can be applied:

[0521] - In the case of 'FullPwrMode1', the sum of the transmit powers of the four antenna connections for a 4Tx terminal may be 'ue_PowerClass' = PC1.5. In this case, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied. For example, the MPR may be applied as shown in the following example:

[0522] -For UEs supporting 10 dB antenna isolation (e.g., handheld UE / vehicle UE / industrial device), PC1.5_4Tx MPR according to the example in Table 11 may be applied;

[0523] -For UEs supporting antenna isolation of 20 dB or greater (e.g., FWA / CPE / industrial devices), PC1.5_4Tx MPR according to the example in Table 12 can be applied.

[0524] An FR1 4Tx UE supporting PC1.5 (29dBm) and UL-MIMO can switch to one antenna port to transmit the signal.

[0525] In this case, the following examples can be applied:

[0526] - If 'txDiversity-r16' is specified, the sum of the transmit powers at the four antenna connection ends may be 'ue_PowerClass' = PC1.5. In this case, the 4Tx PC1.5 MPR of Table 11 or the 4TxPC1.5 MPR of Table 12 may be applied. For example, the MPR may be applied as shown in the following example:

[0527] -For UEs supporting 10 dB antenna isolation (e.g., handheld UE / vehicle UE / industrial device), PC1.5_4Tx MPR according to the example in Table 11 may be applied;

[0528] -UE with 20dB or greater antenna isolation (e.g., FWA / CPE / industrial devices)

[0529] Alternatively, a new UE capability for the number of antennas supporting tx diversity may be added. As an example, this capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[0530] -'txDiversity-r18' = 2, 3, 4; or

[0531] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0532] For example, the terminal may switch to one antenna port and transmit it (without UL-MIMO). In this case, the terminal may specify 'txDivergence-r18=4'. In this case, the sum of the transmit powers at the four antenna connectors may be 'ue_PowerClass'=PC1.5. In this case, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied. For example, the MPR may be applied as shown in the following example:

[0533] -For UEs supporting 10 dB antenna isolation (e.g., handheld UE / vehicle UE / industrial device), PC1.5_4Tx MPR according to the example in Table 11 may be applied;

[0534] -For UEs supporting antenna isolation of 20 dB or greater (e.g., FWA / CPE / industrial devices), PC1.5_4Tx MPR according to the example in Table 12 can be applied.

[0535] In case 2 (PA1 and PA2 are 26dBm PAs, and PA3 and PA4 are 23dBm PAs), a PC1.5 (29dBm) UE may be designated as PC1.5 in the 'ue_PowerClass' signal information.

[0536] When the UE transmits through 4 antenna ports, the MPR may be applied to the sum of the total transmit power in the 4 antenna connectors. In this case, for 4 / 3 / 2 / 1 layer UL-MIMO, the following applies:

[0537] i) For MPR, the existing 2Tx PC1.5 MPR (e.g., Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx in Table 6.2D.2-2 and Table 6.2D.2-3 [TS38.101-1V17.6.0]) may be applied as is; or

[0538] ii) For MPR, it is recommended to apply the new 4Tx PC1.5 MPR (e.g., Table 11 and Table 12). For a specific MPR value, the examples of Table 11 and Table 12 can be applied according to the antenna isolation.

[0539] For case 2 (e.g., 26dBm+26dBm+23dBm PA structure) and case 1 (23dBm+23dBm+23dBm), PC1.5_4Tx MPR may have the same MPR value. For example, a terminal with an antenna isolation of 10dB may apply an MPR value based on Table 11. For example, when the antenna isolation is 20dB or 20dB or greater, the terminal may apply an MPR value based on Table 12.

[0540] For UE, when UL-MIMO UE full power mode is configured, the following description can be applied:

[0541] - In the case of 'FullPwrMode3', for a 4Tx terminal, the sum of the transmit powers of the two antenna connections may be 'ue_PowerClass' = PC1.5. In this case, the MPR may be the same as the existing 2Tx PC1.5 MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 have the maximum power reduction (MPR) for power class 1.5 for dual Tx [TS38.101-1V17.6.0]). Alternatively, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied.

[0542] - In the case of 'FullPwrMode1', for a 4Tx terminal, the sum of the transmit powers of the four antenna connections may be 'ue_PowerClass' = PC1.5. In this case, the terminal may apply the 4Tx PC1.5 MPR according to Tables 11 and 12 based on antenna isolation. It is proposed to apply it.

[0543] An FR1 4Tx UE supporting PC1.5 (29dBm) and UL-MIMO can switch to one antenna port to transmit the signal.

[0544] In this case, the following examples can be applied:

[0545] -When 'txDiversity-r16' is specified, the sum of the transmit powers at the two antenna connectors of the FR1 4Tx UE may be 'ue_PowerClass' = PC1.5. In this case, the MPR may be the same as the existing PC1.5_2Tx MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]). Alternatively, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied.

[0546] Alternatively, since 'txDiversity-r16' is usually applied to 2Tx, in order to support 4Tx diversity, a UE capability for the number of antennas supporting tx diversity may be added. As an example, the capability may be defined as 'txDiversity-r18'. If there is a UE capability for the number of antennas supporting tx diversity, it may be defined in the following form:

[0547] -'txDiversity-r18' = 2, 3, 4; or

[0548] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0549] In this case, the terminal may specify 'txDivergence-r18=4' or 'txDiversity4-r18'. In this case, the sum of the transmit powers at the four antenna connectors may be 'ue_PowerClass'=PC1.5. In this case, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied depending on the antenna isolation.

[0550] In case 3 (PA1, PA2, PA3 and PA4 are all 26dBm PA), PC1.5 (29dBm) UE can be designated as PC1.5 in the 'ue_PowerClass' signal information.

[0551] When the UE transmits through 4 antenna ports, the MPR can be applied to the sum of the total transmit power in the 4 antenna connectors. In this case, for 4 / 3 / 2 / 1 layer UL-MIMO, the following description applies:

[0552] i) For MPR, the existing 2Tx PC1.5 MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]) may be applied verbatim; or

[0553] ii) For MPR, it is recommended to apply the new 4Tx PC1.5 MPR (e.g., Table 11 and Table 12). For a specific MPR value, the examples of Table 11 and Table 12 can be applied according to the antenna isolation.

[0554] For case 3 (e.g., 26dBm+26dBm+26dBm+26dBm PA structure), PC1.5_4Tx MPR can be equally applied to case 1 (23dBm+23dBm+23dBm+23dBm). For example, a terminal with an antenna isolation of 10dB can apply an MPR value based on Table 11. For example, if the antenna isolation is 20dB or greater, the terminal can apply an MPR value based on Table 12.

[0555] For UE, when UL-MIMO UE full power mode is configured, the following description can be applied:

[0556] - In the case of 'FullPwrMode3' or 'FullPwrMode4', for a 4Tx terminal, the sum of the transmit powers of the two antenna connectors may be 'ue_PowerClass' = PC1.5. In this case, the MPR may be the same as the existing 2TxPC1.5 MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 have the maximum power reduction (MPR) for power class 1.5 in the case of dual Tx [TS38.101-1V17.6.0]). Alternatively, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied.

[0557] - In case of 'FullPwrMode1', for a 4Tx terminal, the sum of the transmit powers of the 4 antenna connectors may be 'ue_PowerClass' = PC1.5. In this case, the UE may apply the 4Tx PC1.5 MPR according to Table 11 and Table 12 based on antenna isolation.

[0558] A FR1 4Tx UE supporting PC1.5 (29dBm) and UL-MIMO can transmit signals by switching to one antenna port. In this case, the following examples can be applied:

[0559] -When 'txDiversity-r16' is specified, the sum of the transmit powers at the two antenna connectors of the FR1 4Tx UE may be 'ue_PowerClass' = PC1.5. In this case, the MPR may be the same as the existing PC1.5_2Tx MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]). Alternatively, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied.

[0560] Alternatively, since 'txDiversity-r16' is usually applied to 2Tx, in order to support 4Tx diversity, a UE capability for the number of antennas supporting tx diversity may be added. As an example, the capability may be defined as 'txDiversity-r18'. If there is a UE capability for the number of antennas supporting tx diversity, it may be defined in the following form:

[0561] -'txDiversity-r18' = 2, 3, 4; or

[0562] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0563] In this case, the terminal may specify 'txDivergence-r18=4' or 'txDiversity4-r18'. In this case, the sum of the transmit powers at the four antenna connectors may be 'ue_PowerClass'=PC1.5. In this case, the 4Tx PC1.5 MPR of Table 11 or the 4Tx PC1.5 MPR of Table 12 may be applied depending on the antenna isolation.

[0564] When the UE supports PC1.5 (29dBm) and UL-MIMO, MPR may be applied as shown in the following example.

[0565] For example, if the antenna isolation is 10 dB, the 4Tx PC1.5 (29 dBm) UE can apply the MPR of Table 11 to all cases 1, 2, and 3. If the antenna isolation is 20 dB or greater, the 4Tx PC1.5 (29 dBm) UE can apply the MPR of Table 12 to all cases 1, 2, and 3.

[0566] For another example, in the case of UL-MIMO, depending on the full power transmission mode, the UE may also apply 4Tx PC1.5 MPR (Table 11, Table 12) or 2Tx PC1.5 MPR (e.g., Table 6.2D.2-2 and Table 6.2D.2-3 with maximum power reduction (MPR) for power level 1.5 with dual Tx [TS38.101-1V17.6.0]).

[0567] For another example, if the Tx diversity supported by the UE is 2Tx, the UE may apply 2Tx PC1.5 MPR (e.g., Maximum Power Reduction (MPR) for Power Level 1.5 with Dual Tx in Table 6.2D.2-2 and Table 6.2D.2-3 [TS38.101-1V17.6.0]). When the Tx diversity supported by the UE is 4Tx, the UE may apply 4Tx PC1.5 MPR (e.g., MPR in Table 11 and Table 12).

[0568] 1-3. Example of applying MPR

[0569] An example of applying MPR is described.

[0570] i) Example of a device supporting Tx diversity

[0571] When the terminal supports Tx diversity, MPR may be applied as shown in the following example.

[0572] The UE may send the UE's power level information and txDiversity capability information to the network (e.g., a base station). Then, when scheduling, the network may assume that the terminal applies an MPR suitable for the corresponding power level and txDiverity capability to the Tx power. Depending on the terminal type, the antenna isolation value may be different. Therefore, when the terminal supports txDiversity, the terminal may apply different MPR values ​​to the Tx power according to the terminal type or according to the antenna isolation value:

[0573] - If the UE is a power class 3 UE and does not support txDiversity, the UE may apply MPR (e.g., Table 6.2.2-1 Maximum Power Reduction (MPR) for power class 3 [TS38.101-1 V17.6.0]).

[0574] - If the terminal is a power class 2 UE and does not support txDiversity, the terminal may apply MPR (eg, Maximum Power Reduction (MPR) for power class 2 [TS38.101-1 V17.6.0] of Table 6.2.2-2).

[0575] - If the terminal is a power class 2 UE and supports txDiversity=2, the terminal may apply MPR (eg, Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0576] -If the terminal is a power class 1.5 UE and supports txDiversity=2, and the terminal type is a terminal type with antenna isolation of 10dB or greater and less than 20dB, the terminal can apply MPR (for example, Table 6.2D.2-2 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]).

[0577] -If the terminal is a power class 1.5 UE, supports txDiversity=2, and the terminal type is a terminal type with antenna isolation greater than 20dB, the terminal can apply MPR (for example, Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]).

[0578] - If the terminal is a power class 1.5 UE, supports txDiversity=4, and the terminal type is a terminal type with antenna isolation of 10 dB or more and less than 20 dB, the terminal may apply the MPR according to the example in Table 11.

[0579] - If the terminal supports power class 1.5 and txDiversity=4, and the terminal type is a terminal type with antenna isolation of 20 dB or more, the terminal may apply the MPR according to the example in Table 12.

[0580] ii) When the terminal supports UL-MIMO

[0581] The terminal can send its power level information, antenna port number information and UL full power mode information to the network (base station). Then, when the network performs scheduling related to UL-MIMO, the network can assume that the terminal applies the MPR suitable for the corresponding power level and antenna port number to the Tx power.

[0582] Here, the UL full power mode is as follows:

[0583] -UL Full Power Mode 'Full' = Power level supported by all 1 antenna connector power

[0584] -UL Full Power Mode '2' = Power level supported by a specific antenna connector

[0585] -UL Full Power Mode '1' = power level supported by the sum of the powers at all antenna connectors

[0586] Depending on the terminal type, the antenna isolation value can be different. Therefore, when supporting UL-MIMO, the terminal can apply different MPRs to the Tx power according to the terminal type or antenna isolation value:

[0587] - If the terminal is a power class 3 UE and supports UL-MIMO with antenna ports = 2, the terminal may apply MPR (eg, Maximum Power Reduction (MPR) for power class 3 in Table 6.2.2-1 [TS38.101-1 V17.6.0]).

[0588] - If the terminal is a power class 2 UE, supports UL-MIMO with antenna port = 2, and is in UL full power mode 'Full' or '2', the terminal may apply MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1 V17.6.0]).

[0589] - If the UE is a power class 2 UE, supports UL-MIMO with antenna port = 2, and is in UL full power mode '1', the UE supports MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0590] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 2, is in UL full power mode '1', and the terminal type is a terminal type with antenna isolation of 10 dB (or greater than or equal to 10 dB and less than 20 dB), the UE can apply MPR (for example, Table 6.2D.2-2 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]).

[0591] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 2, is in UL full power mode '1', and the terminal type has antenna isolation greater than or equal to 20dB, the terminal can use MPR (for example, Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]).

[0592] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 4, is in UL full power mode '1', and the terminal type is a terminal type with antenna isolation of 10 dB (or antenna isolation of 10 dB or greater and less than 20 dB), the terminal can apply MPR (for example, MPR according to the example of Table 11).

[0593] - If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 4, UL full power mode '1', and the terminal type is a terminal type with antenna isolation of 20dB or greater, the terminal can apply MPR (for example, MPR according to the example of Table 12).

[0594] iii) When the terminal supports Tx diversity and UL-MIMO

[0595] The terminal may send information about the power level of the terminal, information about the txDiversity capability, and information about the number of antenna ports of the terminal to the network (base station). Then, when performing UL-MIMO scheduling, the network may assume that the terminal applies an MPR suitable for the corresponding power level, txDiversity capability, and number of antenna ports to the Tx power.

[0596] The terminal may send information about the power level of the terminal, information about the txDiversity capability of the terminal, information about the number of antenna ports of the terminal, and information about the UL full power mode of the terminal to the network (base station). Then, when the network performs UL-MIMO scheduling, the terminal may consider applying an MPR suitable for the corresponding power level, txDiversity capability, and number of antenna ports to the Tx power.

[0597] Here, the UL full power mode is as follows:

[0598] -UL Full Power Mode 'Full' = Power level supported by all 1 antenna connector power

[0599] -UL Full Power Mode '2' = Power level supported by a specific antenna connector

[0600] -UL Full Power Mode '1' = power level supported by the sum of the powers at all antenna connectors

[0601] Depending on the terminal type, the antenna isolation value can be different. Therefore, when supporting UL-MIMO, the terminal can apply different MPRs to the Tx power according to the terminal type or antenna isolation value:

[0602] - If the terminal is a power class 3 UE and supports UL-MIMO with antenna ports = 2, the terminal may apply MPR (eg, Maximum Power Reduction (MPR) for power class 3 in Table 6.2.2-1 [TS38.101-1 V17.6.0]).

[0603] - If the terminal is a power class 2 UE, supports UL-MIMO with antenna port = 2, and is in UL full power mode 'Full' or '2', the terminal may apply MPR (e.g., Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1 V17.6.0]).

[0604] - If the UE is a power class 2 UE, supports UL-MIMO with antenna port = 2, and is in UL full power mode '1', the UE supports MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1 V17.6.0]).

[0605] -If the terminal is a power class 2 UE, supports UL-MIMO with antenna port = 1, and supports UL full power mode '1', and txDiversity = 2, the terminal can apply MPR (e.g., Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1V17.6.0]).

[0606] - If the terminal is a power class 2 UE, supports UL-MIMO with antenna port = 1, is in UL full power mode '1', and does not support txDiversity, the terminal may apply MPR (e.g., Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1 V17.6.0] in Table 6.2.2-2).

[0607] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 2, and the terminal type is UL full power mode '1', and the terminal type is an antenna isolation of 10 dB or greater (and less than 20 dB), the terminal can apply MPR (for example, Table 6.2D.2-2 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]).

[0608] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 2, and the terminal type is UL full power mode '1', and the terminal type is an antenna isolation of 20dB or greater, the terminal can apply MPR (for example, Table 6.2D.2-3 Maximum Power Reduction (MPR) for Power Class 1.5 with Dual Tx [TS38.101-1V17.6.0]).

[0609] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 1, supports UL full power mode '1', supports txDiversity = 2, and the terminal type is a terminal type with antenna isolation of 10 dB or greater (and less than 20 dB), the terminal can apply MPR (for example, Table 6.2D.2-1 Maximum Power Reduction (MPR) for Power Class 2 with Dual Tx [TS38.101-1V17.6.0]).

[0610] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 1, UL full power mode '1', supports txDiversity = 2, and the terminal type is a terminal type with antenna isolation of 20 dB or greater, the terminal can apply MPR (for example, Table 6.2.2-2 Maximum Power Reduction (MPR) for Power Class 2 [TS38.101-1V17.6.0]).

[0611] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 4, is UL full power mode '1', and the terminal type is a terminal type with antenna isolation of 10 dB (or antenna isolation greater than or equal to 10 dB and less than 20 dB), the UE can apply MPR (for example, MPR according to the example of Table 11).

[0612] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 4, UL full power mode '1', and the terminal type is a terminal type with antenna isolation of 20dB or greater, the terminal can apply MPR (for example, MPR according to the example in Table 12).

[0613] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 1, UL full power mode '1', supports txDiversity = 4, and the terminal type is a terminal type with an antenna isolation of 10 dB (alternatively, if the antenna isolation is greater than or equal to 10 dB and less than 20 dB), the terminal can apply MPR (for example, the MPR according to the example of Table 11).

[0614] -If the terminal is a power class 1.5 UE, supports UL-MIMO with antenna port = 1, UL full power mode '1', supports txDiversity = 4, and the terminal type is a terminal type with antenna isolation of 20dB or greater, the UE can apply MPR (for example, MPR according to the example of Table 12).

[0615] 2. Second disclosure of this specification

[0616] In the disclosure of this specification, the transmission performance requirements for UEs supporting FR1 UEs of 4Tx will be described. For example, the relevant requirements including UL-MIMO will be described.

[0617] 2-1. Existing FR1 terminal transmission requirements

[0618] The description of the existing FR1 terminal requirement standard may be the same as “1-1. Existing FR1 terminal transmission requirements”.

[0619] 2-2. Transmission requirements for FR1 4Tx terminals

[0620] The transmission requirements (eg, RF requirements related to transmission) of the FR1 4Tx terminal will be described. For example, the transmission requirements of the FR1 4Tx terminal may include MPR.

[0621] In order to further improve the uplink coverage compared to the uplink coverage of the existing 2Tx terminal, a terminal with four transmit antennas will be introduced.

[0622] Regarding 4Tx, the transmission PA structure of the terminal may be as shown in the following cases 1 to 3. For example, based on the 23dBm PA and 26dBm PA considered for the current implementation, the following combination may be used as the terminal transmission PA structure for 4Tx:

[0623] - Case 1: 4*23dBm (i.e., 23dBm+23dBm+23dBm+23dBm)

[0624] - Case 2: 2*23dBm+2*26dBm (e.g., 26dBm+26dBm+23dBm+23dBm)

[0625] - Case 3: 4*26dBm (i.e., 26dBm+26dBm+26dBm+26dBm)

[0626] The terminal output power that can be supported by the above cases 1, 2 and 3 can be determined by applying power backoff, as in the following example:

[0627] The PCs that can be supported by Case 1 may include, for example, PCs based on 23dBm, 26dBm, and 29dBm:

[0628] -23dBm(PC3)=(23-6)+(23-6)+(23-6)+(23-6)dBm. Here, the UE can perform 6dB power backoff for each 23dBm PA;

[0629] -26dBm(PC2)=(23-3)+(23-3)+(23-3)+(23-3)dBm. Here, the UE can perform 3dB power backoff for each 23dBm PA;

[0630] -29dBm(PC1.5)=23+23+23+23dBm Here, the UE does not apply power backoff for each 23dBm PA.

[0631] The PCs that can be supported by case 2 may include, for example, PCs based on 23dBm, 26dBm, and 29dBm:

[0632] -23dBm(PC3)=(23-6)+(23-6)+(26-9)+(26-9)dBm. Here, the UE can perform 6dB power backoff for each of the 23dBm PAs and 9dB power backoff for each of the 26dBm PAs;

[0633] -26dBm(PC2)=(23-3)+(23-3)+(26-6)+(26-6)dBm. Here, the UE can perform 3dB power backoff for each of the 23dBm PAs and 6dB power backoff for each of the 26dBm PAs;

[0634] -29dBm(PC1.5)=(23-0)+(23-0)+(26-3)+(26-3)dBm. Here, the UE can perform 3dB power backoff for each of the 26dBm PAs, but not perform power backoff for each of the 23dBm PAs;

[0635] -30.8dBm = (23-0) + (23-0) + (26-0) + (26-0) dBm. Here, the UE may not perform power backoff for the 23dBm PA and the 26dBm PA. For 30.8dBm output, the existing PC1 (31dBm) may be applied, or a new PC (eg, PC1.1) may be defined.

[0636] The PCs that can be supported by case 3 (e.g., 4x26 dBm) may include, for example, PCs based on 23dBm, 26dBm, and 29dBm:

[0637] -23dBm(PC3)=(26-9)+(26-9)+(26-9)+(26-9)dBm. Here, the UE can perform 9dB power backoff for each of the 26dBm PAs;

[0638] -26dBm(PC2)=(26-6)+(26-6)+(26-6)+(26-6)dBm. Here, the UE can perform 6dB power backoff for each of the 26dBm PAs;

[0639] -29dBm(PC1.5)=(26-3)+(26-3)+(26-3)+(26-3)dBm. Here, the UE can perform 3dB power backoff for each of the 26dBm PAs;

[0640] -32dBm = (26-0) + (26-0) + (26-0) + (26-0) dBm. Here, the UE does not perform power backoff for all 26dBm PAs. For 32dBm output, a new PC may be defined. For example, PC0.9 may be defined.

[0641] As described in the examples of Cases 1 to 3, the terminal may or may not perform fallback for PA based on the structure of the terminal and the PC to be supported. Therefore, the terminal may support "ul_PowerClass" corresponding to each PC. The terminal may report "ul_PowerClass" to the network.

[0642] Describe in detail the UE's 4Tx RF requirements.

[0643] For each of the examples of Case 1 to Case 3, the 4Tx RF standard of the UE will be described.

[0644] In case 1, the UE may support 4-layer UL-MIMO (eg, 23dBm+23dBm+23dBm+23dBm). In this case, the 4Tx RF requirements of the UE will be described.

[0645] In this case, the 4Tx RF standard for PC3, PC2 and PC1.5 terminals supporting 4-layer UL-MIMO can be defined based on the following assumptions. For example, the RF standard for such terminals assumes that TPMI (transmit precoding matrix indicator) = 0, and the corresponding W (e.g., corresponding to Fig.15 4Tx RF standard with TMPI 0W), 1SRS resource and 4SRS antenna ports.

[0646] Examples of the precoding matrix W corresponding to the TPMI index for 4 antenna ports and the TMPI indexes corresponding to 1 layer, 2 layers, 3 layers, and 4 layers are the same as those described in the first disclosure of this specification. Figures 12 to 15 The same example.

[0647] Fig.18 The number of layers, the number of antenna ports, and the number of antenna connectors for 4Tx UL-MIMO are illustrated.

[0648] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0649] Fig.18 An example of a structure for transmitting a 4Tx terminal according to an embodiment of the present specification is illustrated.

[0650] Fig.18 is an example of a structure for transmission of a 4Tx terminal. For reference, Fig.18 The example can be compared with Figures 11a to 11c Same as case 1 in the above example.

[0651] Figures 19a to 19g The example of is an example of TPMI used in full power mode transmission applied to 4Tx 1 layer UL-MIMO corresponding to Case 1.

[0652] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0653] Figures 19a to 19g is an example of using TPMI in 4Tx1 layer UL-MIMO in Case 1 according to an embodiment of the present disclosure.

[0654] Figures 19a to 19g The example is based on Fig.12The example TPMI of the example is applied to the example of 4Tx1 layer UL-MIMO. For example, a precoding matrix W corresponding to the TPMI index (such as the following example) is applied:

[0655] a ==TPMI index '0'

[0656] b ==TPMI index '1'

[0657] c == TPMI index '2'

[0658] d == TPMI index '3'

[0659] e == TPMI index '12'

[0660] f == TPMI index '4'

[0661] g == TPMI index '8'

[0662] Describes the 4Tx RF requirements for PC3 based on Case 1. For PC3 terminals supporting 4-layer UL-MIMO (for example, when PA1, PA2, PA3, and PA4 are all 23dBm PAs according to Case 1), PC3 can be specified in the 'ue_PowerClass' signal information of the terminal. The terminal can transmit based on 4 antenna ports. In this case, it is recommended that the total transmit power of the four antenna connectors should meet 23dBm. The following is an example.

[0663] - In case of PC3 4-layer UL-MIMO, the UE may apply Fig.15 The terminal can apply PA power backoff as follows:

[0664] PA1: 6dB power back-off (17dBm = 23dB-6dB)

[0665] PA2: 6dB power back-off (17dBm = 23dB-6dB)

[0666] PA3: 6dB power back-off (17dBm = 23dB-6dB)

[0667] PA4: 6dB power back-off (17dBm = 23dB-6dB)

[0668] - In case of PC3 3-layer UL-MIMO, the UE may apply Fig.14 The terminal can apply PA power backoff as follows:

[0669] PA1: 6dB power back-off (17dBm = 23dB-6dB)

[0670] PA2: 6dB power back-off (17dBm = 23dB-6dB)

[0671] PA3: 3dB power back-off (20dBm = 23dBm - 3dB)

[0672] PA4: No power back-off (23dBm)

[0673] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0674] - In case of PC3 2-layer UL-MIMO, the UE may apply Fig.13 The TPMI of the UE is 0 / 1 / 2 / 3 / 4 / 5 W. And the terminal can apply PA power backoff as follows:

[0675] PA1: 3dB power back-off (20dBm = 23dBm - 3dB)

[0676] PA2: 3dB power back-off (20dBm = 23dBm - 3dB)

[0677] PA3: 3dB power back-off (20dBm = 23dBm - 3dB)

[0678] PA4: 3dB power back-off (20dBm = 23dBm - 3dB)

[0679] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0680] - In case of PC3 1-layer UL-MIMO, the UE may apply Fig.12 The TPMI of the UE is W of 0 / 1 / 2 / 3. And the terminal can apply PA power backoff as follows:

[0681] PA1: No power backoff (23dBm);

[0682] PA2: no power back-off (23dBm);

[0683] PA3: No power backoff (23dBm);

[0684] PA4: No power back-off (23dBm).

[0685] When the PC3 terminal supporting 4-layer UL-MIMO is case 1 (for example, PA1, PA2, PA3 and PA4 are all 23dBm PAs), the uplink full power transmission mode can be set. In the case of layer 1, TPMI can be assumed as follows, and based on the following assumptions, the UE 23dBm output power can be met.

[0686] -'FullPwrMode': The output power at each connector of the terminal's antenna can meet 23dBm respectively. Alternatively, the UE can apply the corresponding Fig.12 TPMI = 0, 1, 2, 3 W (see, for example, Figures 19a to 19g a to d). And the terminal can apply PA power backoff as follows:

[0687] PA1: No power fallback

[0688] PA2: No power fallback

[0689] PA3: No power fallback

[0690] PA4: No power fallback

[0691] -'FullPwrMode2': The output power from one antenna connector of the terminal can meet 23dBm respectively. Alternatively, the UE can apply the corresponding Fig.12 TPMI = 0 or 1 or 2 or 3 W (see, for example, Figures 19a to 19g a to d). And the terminal can apply PA power backoff as follows:

[0692] PA1: No power fallback

[0693] PA2: No power fallback

[0694] PA3: No power fallback

[0695] PA4: No power fallback

[0696] -'FullPwrMode1': The sum of the output powers from the four antenna connectors of the terminal can meet 23dBm. Alternatively, the terminal can apply Fig.12 TPMI = 12 (see, for example, Figures 19a to 19g (e)). And the terminal can apply PA power backoff as follows:

[0697] PA1: 6dB power back-off

[0698] PA2: 6dB power back-off

[0699] PA3: 6dB power back-off

[0700] PA4: 6dB power back-off

[0701] -'FullPwrMode3': The sum of the output powers at the terminal of the two antennas connected to the terminal can meet 23dBm. Alternatively, the UE can apply the corresponding Fig.12 TPMI = 4 or 8 W (see, for example, Figures 19a to 19g(f)). And the terminal can apply PA power backoff as follows:

[0702] PA1: 3dB power back-off

[0703] PA2: 3dB power back-off

[0704] PA3: 3dB power back-off

[0705] PA4: 3dB power back-off

[0706] -'FullPwrMode4': The sum of the output power of the terminal connected to the two pairs of antennas can each meet 23dBm. Alternatively, the UE can apply the corresponding Fig.12 TPMI = W of {4,8} (see, for example, Figures 19a to 19g (f) and (g) of FIG. 11 ). And the terminal may apply PA power backoff as follows:

[0707] PA1: 3dB power back-off

[0708] PA2: 3dB power back-off

[0709] PA3: 3dB power back-off

[0710] PA4: 3dB power back-off

[0711] Here, in order to meet the output power of 23 dBm, the power back-off applied to each PA may also be considered.

[0712] Here, new uplink full power transmission modes 'FullPwrMode3' and 'FullPwrMode4' are proposed:

[0713] - If the 'FullPwrMode3' terminal is a 4Tx terminal, the terminal may be a terminal in which the sum of the transmission powers of the two antenna connectors of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[0714] - If the 'FullPwrMode4' terminal is a 4Tx terminal, the terminal may be a terminal in which the sum of the transmission powers of two pairs of 2 antenna connectors of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[0715] Here, 'FullPwrMode3' and 'FullPwrMode4' are not applicable to 2Tx terminal.

[0716] Even if the UE switches to one antenna port and transmits it, it is recommended that the transmit power at one antenna connector meets the corresponding 'ue_PowerClass'. (ie, if UL-MIMO is not set)

[0717] The 4TxRF specification of PC2 based on case 1 is described. A PC2 terminal supporting 4-layer UL-MIMO (for example, when PA1, PA2, PA3, and PA4 are all 23dBm PAs according to case 1) can be designated as PC2 in the 'ue_PowerClass' signal information. In this case, the terminal can transmit based on 4 antenna ports. In this case, it is proposed that the sum of the total transmit power in the four antenna connectors should meet 26dBm. The following is an example.

[0718] - In case of PC2 4-layer UL-MIMO, the terminal may apply Fig.15 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0719] PA1: 3dB power back-off (20dBm = 23dBm - 3dB)

[0720] PA2: 3dB power back-off (20dBm = 23dBm - 3dB)

[0721] PA3: 3dB power back-off (20dBm = 23dBm - 3dB)

[0722] PA4: 3dB power back-off (20dBm = 23dBm - 3dB)

[0723] - In case of PC2 3-layer UL-MIMO, the terminal may apply Fig.14 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0724] PA1: 3dB power back-off (20dBm = 23dBm - 3dB)

[0725] PA2: 3dB power back-off (20dBm = 23dBm - 3dB)

[0726] PA3: No power back-off (23dBm)

[0727] PA4: No power back-off (23dBm)

[0728] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0729] - In case of PC2 2-layer UL-MIMO, the terminal may apply Fig.13 TPMI = 0 / 1 / 2 / 3 / 4 / 5 of W.

[0730] In addition, the terminal can apply PA power backoff as follows:

[0731] PA1: No power back-off (23dBm)

[0732] PA2: No power back-off (23dBm)

[0733] PA3: No power back-off (23dBm)

[0734] PA4: No power back-off (23dBm)

[0735] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0736] - In case of PC2 2-layer UL-MIMO, the terminal may apply Fig.13 TPMI = 0 / 1 / 2 / 3 / 4 / 5 of W.

[0737] In addition, the terminal can apply PA power backoff as follows:

[0738] PA1: No power back-off (23dBm)

[0739] PA2: No power back-off (23dBm)

[0740] PA3: No power back-off (23dBm)

[0741] PA4: No power back-off (23dBm)

[0742] For PC2 terminals supporting 4-layer UL-MIMO (for example, according to case 1, when PA1, PA2, PA3 and PA4 are all 23dBm PAs), the uplink full power transmission mode can be set. In the case of layer 1, TPMI can be assumed as follows, and based on the following assumptions, the output power of the UE can be met.

[0743] -'FullPwrMode': The sum of the output powers at the four antenna connectors of the terminal can meet 26dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Figures 19a to 19g (e)). In addition, the terminal may apply PA power backoff as follows:

[0744] PA1: 3dBm power back-off

[0745] PA2: 3dBm power back-off

[0746] PA3: 3dBm power back-off

[0747] PA4: 3dBm power back-off

[0748] -'FullPwrMode3': The sum of the output powers at the two antenna connectors of the terminal can meet 26dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 4 or 8 W (e.g., Figures 19a to 19g (f)). In addition, the terminal can apply PA power backoff as follows:

[0749] PA1: No power fallback

[0750] PA2: No power fallback

[0751] PA3: No power fallback

[0752] PA4: No power fallback

[0753] -'FullPwrMode4': The sum of the output powers at the two pairs of antenna connectors of the terminal can meet 26dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of {4,8} (see, for example, Figures 19a to 19g f and g). In addition, the terminal may apply PA power backoff as follows:

[0754] PA1: No power fallback

[0755] PA2: No power fallback

[0756] PA3: No power fallback

[0757] PA4: No power fallback

[0758] Here, new uplink full power transmission modes 'FullPwrMode3' and 'FullPwrMode4' are proposed:

[0759] - If the 'FullPwrMode3' terminal is a 4Tx terminal, in the case of a 4Tx terminal, the sum of the transmit powers of the two antenna connections of UL-MIMO satisfies the corresponding 'ue_PowerClass'

[0760] - If the 'FullPwrMode4' terminal is a 4Tx terminal, in the case of a 4Tx terminal, the sum of the transmit power of the two pairs of antenna connections of UL-MIMO satisfies the corresponding 'ue_PowerClass'

[0761] Here, 'FullPwrMode3' and 'FullPwrMode4' are not applied to 2Tx termination.

[0762] When the terminal switches to one antenna port and transmits (ie, when UL-MIMO is not set), the terminal may specify 'txDiversity-r16' support. For example, the following example may apply:

[0763] Propose to meet the sum of 26dBm of transmit power at both antenna connectors; or

[0764] Meet a combined transmit power of 26dBm at the three antenna connectors; or,

[0765] The total of 26dBm of transmit power at the four antenna connectors is met.

[0766] Alternatively, a new UE capability for the number of antennas supporting tx diversity may be added. As an example, this capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[0767] -'txDiversity-r18' = 2, 3, 4; or

[0768] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0769] If 'txDiversity-r18' is newly defined, the following description may apply. If the terminal switches to one antenna port and transmits (without UL-MIMO), the following description may apply according to the following 'txDiversity-r18' capability of the terminal:

[0770] - In the case of 'txDiversity-r18'=2 (or 'txDiversity2-r18'), the sum of the transmit powers at the two antenna connectors may satisfy the corresponding 'ue_PowerClass';

[0771] - In case of 'txDiversity-r18'=3 (or 'txDiversity3-r18'), the sum of the transmit powers at the three antenna connectors may satisfy the corresponding 'ue_PowerClass'; or

[0772] - In the case of 'txDiversity-r18'=4 (or 'txDiversity4-r18'), the sum of the transmit powers at the four antenna connectors may satisfy the corresponding 'ue_PowerClass'.

[0773] The terminal can transmit by switching to one antenna port (i.e., when UL-MIMO is not configured). In this case, a terminal that does not specify the 'txDiversity-r16' or 'txDiversity-r18' capability cannot support PC2. Therefore, it is proposed that the terminal informs the network of power level information specified as a power level lower than PC2, that is, a PC3 terminal. As an example, in this case, the UE can be a UE whose uplink full power transmission mode is 'FullPwrMode1', 'FullPwrMode3', or 'FullPwrMode4'.

[0774] The 4Tx RF requirements of PC1.5 based on Case 1 will be described. In the case of a PC1.5 terminal supporting 4-layer UL-MIMO (for example, according to Case 1, when PA1, PA2, PA3, and PA4 are all 23dBm PAs), the 'ue_PowerClass' signal information can be specified as PC1.5. In this case, the terminal can transmit through 4 antenna ports. In this case, the sum of the total transmit power of the four antenna connectors of the terminal must meet 29dBm. The following is an example.

[0775] - In case of PC1.5 4-layer UL-MIMO, the UE may apply Fig.15 The terminal can apply PA power backoff as follows:

[0776] PA1: No power back-off (23dBm)

[0777] PA2: No power back-off (23dBm)

[0778] PA3: No power back-off (23dBm)

[0779] PA4: No power back-off (23dBm)

[0780] - In case of PC1.5 3-layer UL-MIMO, the UE may apply Fig.14 The TPMI of 1 and 2 is W. And the terminal can apply PA power backoff as follows:

[0781] PA1: No power back-off (23dBm)

[0782] PA2: No power back-off (23dBm)

[0783] PA3: No power back-off (23dBm)

[0784] PA4: No power back-off (23dBm)

[0785] - In case of PC1.5 2-layer UL-MIMO, the UE may apply Fig.13 The TPMI of the UE is 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 W. And the terminal can apply PA power backoff as follows:

[0786] PA1: No power back-off (23dBm)

[0787] PA2: No power back-off (23dBm)

[0788] PA3: No power back-off (23dBm)

[0789] PA4: No power back-off (23dBm)

[0790] - In case of PC1.5 1-layer UL-MIMO, the UE may apply Fig.12 The TPMI of 12 W. And the terminal can apply PA power backoff as follows:

[0791] PA1: No power back-off (23dBm)

[0792] PA2: No power back-off (23dBm)

[0793] PA3: No power back-off (23dBm)

[0794] PA4: No power back-off (23dBm)

[0795] For PC1.5 terminals supporting 4-layer UL-MIMO (for example, when PA1, PA2, PA3 and PA4 are all 23dBm PAs), the uplink full power transmission mode can be configured. In the case of layer 1, TPMI can be assumed as follows, and the UE's output power of 29dBm can be met based on the following assumptions.

[0796] -'FullPwrMode1': The sum of the output powers of the four antenna connectors from the terminal can meet 29dBm. Alternatively, the UE can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Figures 19a to 19g (e)). And the terminal can apply PA power backoff as follows:

[0797] PA1: No power fallback

[0798] PA2: No power fallback

[0799] PA3: No power fallback

[0800] PA4: No power fallback

[0801] When the terminal switches to one antenna port and transmits (ie, when UL-MIMO is not set), the terminal may specify 'txDiversity-r16' support. For example, the following example may apply:

[0802] It is proposed to meet the total transmission power of 29dBm in the four antenna connectors.

[0803] Alternatively, a new UE capability for the number of antennas supporting tx diversity may be added. As an example, this capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[0804] -'txDiversity-r18' = 2, 3, 4; or

[0805] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0806] If 'txDiversity-r18' is newly defined, the following description may apply. If the terminal switches to one antenna port and transmits (without UL-MIMO), the following description may apply according to the following 'txDiversity-r18' capability of the terminal:

[0807] - In the case of 'txDiversity-r18'=4 (or 'txDiversity4-r18'), the sum of the transmit powers at the four antenna connectors may satisfy the corresponding 'ue_PowerClass'.

[0808] The terminal can switch to one antenna port and send a signal (that is, when UL-MIMO is not set). In this case, the terminal that does not specify the 'txDiversity-r16' or 'txDiversity-r18' capability cannot support PC1.5ue_PowerClass. Therefore, the terminal can notify the network of the power class information specified as a PC3 terminal and the power class information lower than PC1.5. For example, in this case, the terminal can be a terminal with an uplink full power transmission mode of 'FullPwrMode1'.

[0809] The terminal can support 4-layer UL-MIMO (eg, 26dBm+26dBm+23dBm) of Case 2. In this case, 4Tx RF requirements of the UE will be described.

[0810] In this case, the 4Tx RF standard for PC3, PC2, and PC1.5 terminals supporting 4-layer UL-MIMO may be defined based on the following assumptions. For example, the RF standard for such terminals assumes that TPMI (transmit precoding matrix indicator) = 0, and the corresponding W (e.g., corresponding to Fig.15 4Tx RF standard with TMPI 0W), 1SRS resource and 4SRS antenna ports.

[0811] Figures 20a to 20h The example of is an example of TPMI used in full power mode transmission applied to 4Tx1 layer UL-MIMO corresponding to Case 2.

[0812] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0813] Figures 20a to 20h is an example of using TPMI in 4Tx1 layer UL-MIMO in Case 2 according to an embodiment of the present disclosure.

[0814] Figures 20a to 20h The example is based on Fig.12 The example TPMI is applied to the example of 4Tx1 layer UL-MIMO.

[0815] The 4Tx RF requirements for PC3 based on case 2 are described. In the case of a PC3 terminal supporting 4-layer UL-MIMO (for example, PA1, PA2 are 26dB PAs, PA3, PA4 are 23dBm PAs), the terminal can specify the 'ue_PowerClass' signal information of the terminal as PC3. The terminal can transmit based on four antenna ports. In this case, it is proposed that the sum of the total transmit power in the four antenna connectors should meet 23dBm. The following is an example.

[0816] - In case of PC3 4-layer UL-MIMO, the terminal may apply Fig.15 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0817] PA1: 9dB power backoff (17dBm = 26dB-9dB)

[0818] PA2: 9dB power back-off (17dBm = 26dB-9dB)

[0819] PA3: 6dB power back-off (17dBm = 23dB-6dB)

[0820] PA4: 6dB power back-off (17dBm = 23dB-6dB)

[0821] - In case of PC3 4-layer UL-MIMO, the terminal may apply Fig.15 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0822] PA1: 9dB power backoff (17dBm = 26dB-9dB)

[0823] PA2: 9dB power back-off (17dBm = 26dB-9dB)

[0824] PA3: 3dB power back-off (20dBm = 23dBm - 3dB)

[0825] PA4: No power back-off (23dBm)

[0826] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0827] - In case of PC3 2-layer UL-MIMO, the terminal may apply Fig.13 TPMI = 0 / 1 / 2 / 3 / 4 / 5 of W.

[0828] In addition, the terminal can apply PA power backoff as follows:

[0829] PA1: 6dB power back-off (20dBm = 26dB-6dB)

[0830] PA2: 6dB power back-off (20dBm = 26dBm - 6dB)

[0831] PA3: 3dB power back-off (20dBm = 23dBm - 3dB)

[0832] PA4: 3dB power back-off (20dBm = 23dBm - 3dB)

[0833] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0834] - In case of PC3 1-layer UL-MIMO, the terminal may apply Fig.12 TPMI = W of 0 / 1 / 2 / 3. In addition, the terminal can apply PA power backoff as follows:

[0835] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0836] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0837] PA3: No power back-off (23dBm)

[0838] PA4: No power back-off (23dBm)

[0839] When the PC3 terminal supporting 4-layer UL-MIMO is case 2 (for example, PA1, PA2 are 26dBm, and PA3, PA4 are 23dBm), the uplink full power transmission mode can be set. In the case of 1 layer, TPMI can be assumed as follows, and based on the following assumptions, the UE output power of 23dBm can be met.

[0840] -'FullPwrMode': The output power at each connector of the terminal's antenna can meet 23dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 0, 1, 2, 3 W (see, for example, Figures 20a to 20d ). In addition, the terminal can apply PA power backoff as follows:

[0841] PA1: 3dB power back-off

[0842] PA2: 3dB power back-off

[0843] PA3: No power fallback

[0844] PA4: No power fallback

[0845] -'FullPwrMode2': The output power at one antenna connector of the terminal can meet 23dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 0 or 1 or 2 or 3 W (see, for example, Figures 20a to 20d ). In addition, the terminal can apply PA power backoff as follows:

[0846] PA1: 3dB power back-off

[0847] PA2: 3dB power back-off

[0848] PA3: No power fallback

[0849] PA4: No power fallback

[0850] -'FullPwrMode1': The sum of the output powers at the four antenna connectors of the terminal can meet 23dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Fig.20e ). In addition, the terminal can apply PA power backoff as follows:

[0851] PA1: 9dB power back-off

[0852] PA2: 9dB power back-off

[0853] PA3: 6dB power back-off

[0854] PA4: 6dB power back-off

[0855] -'FullPwrMode3': The sum of the output powers at the two antenna connectors of the terminal can meet 23dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 4 or 8 W (see, for example, Fig.20f ):

[0856] PA1: 6dB power back-off

[0857] PA2: 6dB power back-off

[0858] PA3: 3dB power back-off

[0859] PA4: 3dB power back-off

[0860] -'FullPwrMode4': The sum of the output powers at the two pairs of antenna connectors of the terminal can meet 23dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of {4,8} (see, for example, Fig.20f , Figure 20g ):

[0861] PA1: 6dB power back-off

[0862] PA2: 6dB power back-off

[0863] PA3: 3dB power back-off

[0864] PA4: 3dB power back-off

[0865] Here, in order to meet the output power of 23 dBm, the power back-off applied to each PA may also be considered.

[0866] Here, new uplink full power transmission modes 'FullPwrMode3' and 'FullPwrMode4' are proposed:

[0867] - If the 'FullPwrMode3' terminal is a 4Tx terminal, the terminal may be a terminal in which the sum of the transmission powers of the two antenna connectors of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[0868] - If the 'FullPwrMode4' terminal is a 4Tx terminal, the terminal may be a terminal in which the sum of the transmission powers of two pairs of 2 antenna connectors of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[0869] Here, 'FullPwrMode3' and 'FullPwrMode4' are not applicable to 2Tx terminal.

[0870] Even if the UE switches to one antenna port and transmits it, it is recommended that the transmit power at one antenna connector meets the corresponding 'ue_PowerClass'. (ie, if UL-MIMO is not set)

[0871] The 4Tx RF specification of PC2 based on Case 2 is described. In the case of a PC2 terminal supporting 4-layer UL-MIMO (for example, according to Case 2, when PA1, PA2 are 26dBm, PA3 and PA4 are 23dBm), the terminal specifies the PC2 information in the 'ue_PowerClass' signal information as PC2. In this case, the terminal can transmit to four antenna ports. In this case, it is proposed that the sum of the total transmit power in the four antenna connectors should meet 26dBm. The following is an example.

[0872] - In case of PC2 4-layer UL-MIMO, the terminal may apply Fig.15 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0873] PA1: 6dB power back-off (20dBm = 26dB-6dB)

[0874] A2: 6dB power back-off (20dBm = 26dBm - 6dB)

[0875] PA3: 3dB power back-off (20dBm = 23dBm - 3dB)

[0876] PA4: 3dB power back-off (20dBm = 23dBm - 3dB)

[0877] - In case of PC2 3-layer UL-MIMO, the terminal may apply Fig.14 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0878] PA1: 6dB power back-off (20dBm = 26dB-6dB)

[0879] PA2: 6dB power back-off (20dBm = 26dBm - 6dB)

[0880] PA3: No power back-off (23dBm)

[0881] PA4: No power back-off (23dBm)

[0882] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0883] - In case of PC2 2-layer UL-MIMO, the terminal may apply Fig.13 TPMI = 0 / 1 / 2 / 3 / 4 / 5 of W.

[0884] In addition, the terminal can apply PA power backoff as follows:

[0885] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0886] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0887] PA3: No power back-off (23dBm)

[0888] PA4: No power back-off (23dBm)

[0889] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0890] - In case of PC2 1-layer UL-MIMO, the terminal may apply Fig.12 For reference, when PA3=PA4=26dBm and PA1=PA2=23dBm, TPMI=2 / 3 can be applied. In addition, the terminal can apply PA power backoff as follows:

[0891] PA1: No power backoff (26dBm)

[0892] PA2: No power back-off (26dBm)

[0893] PA3: No power back-off (23dBm)

[0894] PA4: No power back-off (23dBm)

[0895] For PC2 terminals supporting 4-layer UL-MIMO (for example, according to case 2, when PA1, PA2 are 26dBm, PA3 and PA4 are 23dBm), the uplink full power transmission mode can be set. In the case of 1 layer, TPMI can be assumed as follows, and the output power of the UE can be satisfied based on the following assumptions.

[0896] -'FullPwrMode2': The output power at one antenna connector of the terminal can meet 26dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 0 or 1 W (see, for example, Fig.20a , Fig.20b ). In addition, the terminal can apply PA power backoff as follows:

[0897] PA1: No power fallback

[0898] PA2: No power fallback

[0899] PA3: No power fallback

[0900] PA4: No power fallback

[0901] -'FullPwrMode1': The sum of the output powers at the four antenna connectors of the terminal can meet 26dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Fig.20e ). In addition, the terminal can apply PA power backoff as follows:

[0902] PA1: 6dB power back-off

[0903] PA2: 6dB power back-off

[0904] PA3: 3dB power back-off

[0905] PA4: 3dB power back-off

[0906] -'FullPwrMode3': The sum of the output powers at the two antenna connectors of the terminal can meet 26dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 4 or 8 W (see, for example, Fig.20f ). In addition, the terminal can apply PA power backoff as follows:

[0907] PA1: 3dB power back-off

[0908] PA2: 3dB power back-off

[0909] PA3: No power fallback

[0910] PA4: No power fallback

[0911] -'FullPwrMode4': The sum of the output powers at the two antenna connectors of a pair can meet 26dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = {4,8} W (e.g., Figure 20gIn addition, the terminal can apply PA power backoff as follows:

[0912] PA1: 3dB power back-off

[0913] PA2: 3dB power back-off

[0914] PA3: No power fallback

[0915] PA4: No power fallback

[0916] Here, new uplink full power transmission modes 'FullPwrMode3' and 'FullPwrMode4' are proposed:

[0917] - If the 'FullPwrMode3' terminal is a 4Tx terminal, in the case of a 4Tx terminal, the sum of the transmission powers of two antenna connections of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[0918] - If the 'FullPwrMode4' terminal is a 4Tx terminal, in the case of a 4Tx terminal, the sum of the transmission power of two pairs of antenna connections of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[0919] Here, 'FullPwrMode3' and 'FullPwrMode4' are not applied to 2Tx termination.

[0920] The terminal can transmit by switching to one antenna port (ie, when UL-MIMO is not configured). In this case, the transmit power of one antenna connector of the terminal can meet the corresponding 'ue_PowerClass' (if UL-MIMO is not configured).

[0921] The 4Tx RF standard of PC1.5 based on Case 2 will be described. In the case of a PC1.5 terminal supporting 4-layer UL-MIMO (for example, according to Case 2, when PA1 and PA2 are 26dBm and PA3 and PA4 are 23dBm), the 'ue_PowerClass' signal information can be specified as PC1.5. In this case, the terminal can transmit based on 4 antenna ports. In this case, the sum of the total transmit power of the four antenna connectors of the terminal must meet 29dBm. The following is an example.

[0922] - In the case of PC1.5 4-layer UL-MIMO, the terminal can apply the corresponding Fig.15 The terminal can apply PA power backoff as follows:

[0923] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0924] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0925] PA3: No power back-off (23dBm)

[0926] PA4: No power back-off (23dBm)

[0927] - In the case of PC1.5 3-layer UL-MIMO, the terminal may apply the corresponding Fig.14 TPMI=1,2 in W. And the terminal can apply PA power backoff as follows:

[0928] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0929] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0930] PA3: No power back-off (23dBm)

[0931] PA4: No power back-off (23dBm)

[0932] - In the case of PC1.5 2-layer UL-MIMO, the terminal may apply the corresponding Fig.13 The TPMI of the UE is 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 W. And the terminal can apply PA power backoff as follows:

[0933] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0934] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0935] PA3: No power back-off (23dBm)

[0936] PA4: No power back-off (23dBm)

[0937] - In the case of PC1.5 1-layer UL-MIMO, the terminal may apply the corresponding Fig.12 The TPMI of 12 W. And the terminal can apply PA power backoff as follows:

[0938] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0939] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0940] PA3: No power back-off (23dBm)

[0941] PA4: No power back-off (23dBm)

[0942] For PC1.5 terminals supporting 4-layer UL-MIMO (for example, according to case 2, when PA1, PA2 are 26dBm, PA3 and PA4 are 23dBm), the uplink full power transmission mode can be set. In the case of 1 layer, TPMI can be assumed as follows, and the output power of the UE can be satisfied based on the following assumptions.

[0943] -'FullPwrMode1': The sum of the output powers at the four antenna connectors of the terminal can meet 29dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Fig.20e ). In addition, the terminal can apply PA power backoff as follows:

[0944] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0945] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0946] PA3: No power back-off (23dBm)

[0947] PA4: No power back-off (23dBm)

[0948] -'FullPwrMode3': The sum of the output powers at the two antenna connectors of the terminal can meet 29dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 4 or 8 W (see, for example, Figure 20h ). In addition, the terminal can apply PA power backoff as follows:

[0949] PA1: No power fallback

[0950] PA2: No power fallback

[0951] PA3: No power fallback

[0952] PA4: No power fallback

[0953] When the terminal switches to one antenna port and transmits (ie, when UL-MIMO is not set), the terminal may specify 'txDiversity-r16' support. For example, the following example may apply:

[0954] It is proposed that the sum of the transmit powers in the four antenna connectors satisfies the corresponding 'ue_PowerClass'.

[0955] Alternatively, a new UE capability for the number of antennas supporting tx diversity may be added. As an example, this capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[0956] -'txDiversity-r18' = 2, 3, 4; or

[0957] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[0958] If 'txDiversity-r18' is newly defined, the following description may apply. If the terminal switches to one antenna port and transmits (without UL-MIMO), the following description may apply according to the following 'txDiversity-r18' capability of the terminal:

[0959] - In the case of 'txDiversity-r18'=2 (or 'txDiversity2-r18'), the sum of the transmit powers at the two antenna connectors may satisfy the corresponding 'ue_PowerClass';

[0960] - In case of 'txDiversity-r18'=3 (or 'txDiversity3-r18'), the sum of the transmit powers at the three antenna connectors may satisfy the corresponding 'ue_PowerClass'; or

[0961] - In the case of 'txDiversity-r18'=4 (or 'txDiversity4-r18'), the sum of the transmit powers at the four antenna connectors may satisfy the corresponding 'ue_PowerClass'.

[0962] The terminal can switch to one antenna port and send a signal (that is, when UL-MIMO is not set). In this case, the terminal that does not specify the 'txDiversity-r16' or 'txDiversity-r18' capability cannot support PC1.5ue_PowerClass. Therefore, the terminal can notify the network of the power class information specified as a PC3 terminal and the power class information lower than PC1.5. For example, in this case, the terminal can be a terminal with an uplink full power transmission mode of 'FullPwrMode1' or 'FullPwrMode2'.

[0963] The terminal can support 4-layer UL-MIMO (eg, 26dBm+26dBm+26dBm+26dBm) of Case 3. In this case, 4Tx RF requirements of the UE will be described.

[0964] In this case, the 4Tx RF standard for PC3, PC2, and PC1.5 terminals supporting 4-layer UL-MIMO may be defined based on the following assumptions. For example, the RF standard for such terminals assumes that TPMI (transmit precoding matrix indicator) = 0, and the corresponding W (e.g., corresponding to Fig.15 4Tx RF standard with TMPI 0W), 1SRS resource and 4SRS antenna ports.

[0965] Figures 21a to 21g The example of is an example of TPMI used in full power mode transmission applied to 4Tx1 layer UL-MIMO corresponding to Case 3.

[0966] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[0967] Figures 21a to 21g is an example of using TPMI in 4Tx1 layer UL-MIMO in Case 3 according to an embodiment of the present disclosure.

[0968] Figures 21a to 21g The example is based on Fig.12 The TPMI of the example is applied to the example of 4Tx1 layer UL-MIMO. For example, a precoding matrix W corresponding to the TPMI (such as the following example) is applied:

[0969] a ==TPMI index '0'

[0970] b ==TPMI index '1'

[0971] c == TPMI index '2'

[0972] d == TPMI index '3'

[0973] e == TPMI index '12'

[0974] f == TPMI index '4'

[0975] g == TPMI index '8'

[0976] The 4Tx RF requirements for PC3 based on Case 3 are described. In the case of a PC3 terminal supporting 4-layer UL-MIMO (for example, PA1, PA2, PA3, and PA4 are all 26dBm PAs according to Case 3), the 'ue_PowerClass' signal information of the terminal can be specified as PC3. The terminal can transmit based on four antenna ports. In this case, it is proposed that the sum of the total transmit power in the four antenna connectors should meet 23dBm. The following is an example.

[0977] - In case of PC3 4-layer UL-MIMO, the terminal may apply Fig.15 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0978] PA1: 9dB power backoff (17dBm = 26dB-9dB)

[0979] PA2: 9dB power back-off (17dBm = 26dB-9dB)

[0980] PA3: 9dB power back-off (17dBm = 26dB-9dB)

[0981] PA4: 9dB power back-off (17dBm = 26dB-9dB)

[0982] - In case of PC3 3-layer UL-MIMO, the terminal may apply Fig.14 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[0983] PA1: 9dB power backoff (17dBm = 26dB-9dB)

[0984] PA2: 9dB power back-off (17dBm = 26dB-9dB)

[0985] PA3: 6dB power back-off (20dBm = 26dB-6dB)

[0986] PA4: No power back-off (26dBm)

[0987] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0988] - In case of PC3 2-layer UL-MIMO, the terminal may apply Fig.13 In addition, the terminal may apply PA power backoff as follows:

[0989] PA1: 6dB power back-off (20dBm = 26dB-6dB)

[0990] PA2: 6dB power back-off (20dBm = 26dBm - 6dB)

[0991] PA3: 6dB power back-off (20dBm = 26dB-6dB)

[0992] PA4: 6dB power back-off (20dBm = 26dB-6dB)

[0993] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[0994] - In case of PC3 1-layer UL-MIMO, the terminal may apply Fig.12 TPMI = W of 0 / 1 / 2 / 3. In addition, the terminal can apply PA power backoff as follows:

[0995] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[0996] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[0997] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[0998] PA4: 3dB power back-off (23dBm = 26dBm - 3dB)

[0999] If the PC3 terminal supporting 4-layer UL-MIMO is case 2 (for example, PA1, PA2, PA3, PA4 are all 26dBm), the uplink full power transmission mode can be set. In the case of 1 layer, TPMI can be assumed as follows, and based on the following assumptions, the UE output power of 23dBm can be met.

[1000] -'FullPwrMode': The output power at each connector of the terminal's antenna can meet 23dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 0, 1, 2, 3 W (see, for example, Figures 21a to 21d ). In addition, the terminal can apply PA power backoff as follows:

[1001] PA1: 3dB power back-off

[1002] PA2: 3dB power back-off

[1003] PA3: 3dB power back-off

[1004] PA4: 3dB power back-off

[1005] -'FullPwrMode2': The output power of one antenna connector of the terminal can meet 23dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 0 or 1 or 2 or 3 W (see, for example, Figures 21a to 21d ). In addition, the terminal can apply PA power backoff as follows:

[1006] PA1: 3dB power back-off

[1007] PA2: 3dB power back-off

[1008] PA3: 3dB power back-off

[1009] PA4: 3dB power back-off

[1010] -'FullPwrMode1': The sum of the output powers at the four antenna connectors of the terminal can meet 23dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Fig.21e ). In addition, the terminal can apply PA power backoff as follows:

[1011] PA1: 9dB power back-off

[1012] PA2: 9dB power back-off

[1013] PA3: 9dB power back-off

[1014] PA4: 9dB power back-off

[1015] -'FullPwrMode3': The sum of the output powers at the two antenna connectors of the terminal can meet 23dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 4 or 8 W (see, for example, Fig.21f ). The terminal can apply PA power backoff as follows:

[1016] PA1: 6dB power back-off

[1017] PA2: 6dB power back-off

[1018] PA3: 6dB power back-off

[1019] PA4: 6dB power back-off

[1020] -'FullPwrMode4': The sum of the output powers at the two pairs of antenna connectors of the terminal can meet 23dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = {4,8} W (see Fig.21f , Figure 21g ). The terminal can apply PA power backoff as follows:

[1021] PA1: 6dB power back-off

[1022] PA2: 6dB power back-off

[1023] PA3: 6dB power back-off

[1024] PA4: 6dB power back-off

[1025] Here, in order to meet the output power of 23 dBm, the power back-off applied to each PA may also be considered.

[1026] Here, new uplink full power transmission modes 'FullPwrMode3' and 'FullPwrMode4' are proposed:

[1027] - If the 'FullPwrMode3' terminal is a 4Tx terminal, the terminal may be a terminal in which the sum of the transmission powers of the two antenna connectors of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[1028] - If the 'FullPwrMode4' terminal is a 4Tx terminal, the terminal may be a terminal in which the sum of the transmission powers of two pairs of 2 antenna connectors of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[1029] Here, 'FullPwrMode3' and 'FullPwrMode4' are not applicable to 2Tx terminal.

[1030] Even if the UE switches to one antenna port and transmits it, it is recommended that the transmit power at one antenna connector meets the corresponding 'ue_PowerClass'. (ie, if UL-MIMO is not set)

[1031] The 4Tx RF specification of PC2 based on Case 3 is described. In the case of a PC2 terminal supporting 4-layer UL-MIMO (for example, according to Case 3, when PA1, PA2, PA3, and PA4 are all 26dB PAs), the terminal can specify the 'ue_PowerClass' signal information as PC2. In this case, the terminal can transmit based on 4 antenna ports. In this case, it is proposed that the sum of the total transmit power in the four antenna connectors should meet 26dBm. The following is an example.

[1032] - In case of PC2 4-layer UL-MIMO, the terminal may apply Fig.15TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[1033] PA1: 6dB power back-off (20dBm = 26dB-6dB)

[1034] PA2: 6dB power back-off (20dBm = 26dBm - 6dB)

[1035] PA3: 6dB power back-off (20dBm = 26dB-6dB)

[1036] PA4: 6dB power back-off (20dBm = 26dB-6dB)

[1037] - In case of PC2 3-layer UL-MIMO, the terminal may apply Fig.14 TPMI = 0 W. In addition, the terminal can apply PA power backoff as follows:

[1038] PA1: 6dB power back-off (20dBm = 26dB-6dB)

[1039] PA2: 6dB power back-off (20dBm = 26dBm - 6dB)

[1040] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[1041] PA4: No power back-off (23dBm)

[1042] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[1043] - In case of PC2 2-layer UL-MIMO, the terminal may apply Fig.13 TPMI = 0 / 1 / 2 / 3 / 4 / 5 of W.

[1044] In addition, the terminal can apply PA power backoff as follows:

[1045] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[1046] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[1047] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[1048] PA4: 3dB power back-off (23dBm = 26dBm - 3dB)

[1049] Assume that W of the above TPMI is applied in the order of PA1 / PA2 / PA3 / PA4.

[1050] - In case of PC2 1-layer UL-MIMO, the terminal may apply Fig.12 TPMI = W of 0 / 1 / 2 / 3. In addition, the terminal can apply PA power backoff as follows:

[1051] PA1: No power backoff (26dBm)

[1052] PA2: No power back-off (26dBm)

[1053] PA3: No power back-off (26dBm)

[1054] PA4: No power back-off (26dBm)

[1055] For PC2 terminals supporting 4-layer UL-MIMO (for example, according to case 3, when PA1, PA2, PA3 and PA4 are 26dB), the uplink full power transmission mode can be set. In the case of 1 layer, TPMI can be assumed as follows, and the output power of the UE can be met based on the following assumptions.

[1056] -'FullPwrMode': The output power at each connector of the terminal's antenna can meet 26dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 0, 1, 2 and 3 W (see, for example, Fig.12 a. Fig.12 b. Fig.12 c and Fig.12 d). In addition, the terminal can apply PA power backoff as follows:

[1057] PA1: No power fallback

[1058] PA2: No power fallback

[1059] PA3: No power fallback

[1060] PA4: No power fallback

[1061] -'FullPwrMode2': The output power at one antenna connector of the terminal can meet 26dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 0 or 1 or 2 or 3 W (see, for example, Fig.12 a. Fig.12 b. Fig.12 c and Fig.12 d). In addition, the terminal can apply PA power backoff as follows:

[1062] PA1: No power fallback

[1063] PA2: No power fallback

[1064] PA3: No power fallback

[1065] PA4: No power fallback

[1066] -'FullPwrMode1': The sum of the output powers at the four antenna connectors of the terminal can meet 26dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Fig.12 e). In addition, the terminal may apply PA power backoff as follows:

[1067] PA1: 6dB power back-off

[1068] PA2: 6dB power back-off

[1069] PA3: 6dB power back-off

[1070] PA4: 6dB power back-off

[1071] -'FullPwrMode3': The sum of the output powers at the two antenna connectors of the terminal can meet 26dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 4 or 8 W (see, for example, Fig.12 f). In addition, the terminal may apply PA power backoff as follows:

[1072] PA1: 3dB power back-off

[1073] PA2: 3dB power back-off

[1074] PA3: 3dB power back-off

[1075] PA4: 3dB power back-off

[1076] -'FullPwrMode4': The sum of the output powers at the two pairs of antenna connectors of the terminal can meet 26dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of {4 and 8} (see, for example, Fig.12 f. Fig.12 g). In addition, the terminal may apply PA power backoff as follows:

[1077] PA1: 3dB power back-off

[1078] PA2: 3dB power back-off

[1079] PA3: 3dB power back-off

[1080] PA4: 3dB power back-off

[1081] Here, new uplink full power transmission modes 'FullPwrMode3' and 'FullPwrMode4' are proposed:

[1082] - If the 'FullPwrMode3' terminal is a 4Tx terminal, in the case of a 4Tx terminal, the sum of the transmission powers of two antenna connections of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[1083] - If the 'FullPwrMode4' terminal is a 4Tx terminal, in the case of a 4Tx terminal, the sum of the transmission power of two pairs of antenna connections of UL-MIMO satisfies the corresponding 'ue_PowerClass'.

[1084] Here, 'FullPwrMode3' and 'FullPwrMode4' are not applied to 2Tx termination.

[1085] The terminal can transmit by switching to one antenna port (ie, when UL-MIMO is not configured). In this case, the transmit power of one antenna connector of the terminal can meet the corresponding 'ue_PowerClass' (if UL-MIMO is not configured).

[1086] The 4Tx RF standard of PC1.5 based on case 3 will be described. In the case of a PC1.5 terminal supporting 4-layer UL-MIMO (for example, according to case 3, when PA1, PA2, PA3, and PA4 are 26dB), the 'ue_PowerClass' signal information can be specified as PC1.5. In this case, the terminal can transmit based on four antenna ports. In this case, the sum of the total transmit power of the four antenna connectors of the terminal must meet 29dBm. The following is an example.

[1087] - In case of PC1.5 4-layer UL-MIMO, the UE may apply Fig.15 The terminal can apply PA power backoff as follows:

[1088] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[1089] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[1090] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[1091] PA4: 3dB power back-off (23dBm = 26dBm - 3dB)

[1092] - In the case of PC1.5 3-layer UL-MIMO, the terminal may apply the corresponding Fig.14 TPMI=1,2 in W. And the terminal can apply PA power backoff as follows:

[1093] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[1094] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[1095] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[1096] PA4: 3dB power back-off (23dBm = 26dBm - 3dB)

[1097] - In case of PC1.5 2-layer UL-MIMO, the UE may apply Fig.13 The TPMI of the UE is 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 W. And the terminal can apply PA power backoff as follows:

[1098] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[1099] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[1100] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[1101] PA4: 3dB power back-off (23dBm = 26dBm - 3dB)

[1102] - In case of PC1.5 1-layer UL-MIMO, the UE may apply Fig.12 The TPMI of 12 W. And the terminal can apply PA power backoff as follows:

[1103] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[1104] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[1105] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[1106] PA4: 3dB power back-off (23dBm = 26dBm - 3dB)

[1107] For PC1.5 terminals supporting 4-layer UL-MIMO (for example, according to case 3, when PA1, PA2, PA3 and PA4 are 26dB), the uplink full power transmission mode can be set. In the case of 1 layer, TPMI can be assumed as follows, and the output power of the UE can be satisfied based on the following assumptions.

[1108] -'FullPwrMode1': The sum of the output powers at the four antenna connectors of the terminal can meet 29dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of 12 (see, for example, Fig.21e ). In addition, the terminal can apply PA power backoff as follows:

[1109] PA1: 3dB power back-off (23dBm = 26dBm - 3dB)

[1110] PA2: 3dB power back-off (23dBm = 26dBm - 3dB)

[1111] PA3: 3dB power back-off (23dBm = 26dBm - 3dB)

[1112] PA4: 3dB power back-off (23dBm = 26dBm - 3dB)

[1113] -'FullPwrMode3': The sum of the output powers at the two antenna connectors of the terminal can meet 29dBm. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = 4 or 8 W (see, for example, Fig.21f ). In addition, the terminal can apply PA power backoff as follows:

[1114] PA1: No power fallback

[1115] PA2: No power fallback

[1116] PA3: No power fallback

[1117] PA4: No power fallback

[1118] -'FullPwrMode4': The sum of the output powers at the two pairs of antenna connectors of the terminal can meet 29dBm respectively. Alternatively, the terminal can apply the corresponding Fig.12 TPMI = W of {4 and 8} (see, for example, Fig.12 f. Fig.12 g). In addition, the terminal may apply PA power backoff as follows:

[1119] PA1: No power fallback

[1120] PA2: No power fallback

[1121] PA3: No power fallback

[1122] PA4: No power fallback

[1123] When the terminal switches to one antenna port and transmits (ie, when UL-MIMO is not set), the terminal may specify 'txDiversity-r16' support. For example, the following example may apply:

[1124] Propose to meet the sum of 26dBm transmit power at both antenna connectors; or

[1125] It is proposed to meet the total transmission power of 26dBm in the four antenna connectors.

[1126] Alternatively, a new UE capability for the number of antennas supporting tx diversity may be added. As an example, this capability may be defined as 'txDiversity-r18'. For example, it may be defined in the following form:

[1127] -'txDiversity-r18' = 2, 3, 4; or

[1128] -'txDiversity2-r18', 'txDiversity3-r18', 'txDiversity4-r18'.

[1129] If 'txDiversity-r18' is newly defined, the following description may apply. If the terminal switches to one antenna port and transmits (without UL-MIMO), the following description may apply according to the following 'txDiversity-r18' capability of the terminal:

[1130] - In the case of 'txDiversity-r18'=2 (or 'txDiversity2-r18'), the sum of the transmit powers at the two antenna connectors may satisfy the corresponding 'ue_PowerClass';

[1131] - In case of 'txDiversity-r18'=3 (or 'txDiversity3-r18'), the sum of the transmit powers at the three antenna connectors may satisfy the corresponding 'ue_PowerClass'; or

[1132] - In the case of 'txDiversity-r18'=4 (or 'txDiversity4-r18'), the sum of the transmit powers at the four antenna connectors may satisfy the corresponding 'ue_PowerClass'.

[1133] The terminal can switch to one antenna port and send a signal (that is, when UL-MIMO is not set). In this case, the terminal that does not specify the 'txDiversity-r16' or 'txDiversity-r18' capability cannot support PC1.5ue_PowerClass. Therefore, it is recommended that the terminal notify the network of the power class information specified as a PC2 terminal and the power class information lower than PC1.5. For example, in this case, the terminal can be a terminal with an uplink full power transmission mode of 'FullPwrMode1', 'FullPwrMode3' or 'FullPwrMode4'.

[1134] The following figures are intended to illustrate specific embodiments of the present disclosure. The designation of specific devices or specific signals / messages / fields shown in the figures is for illustrative purposes only, and the technical features of this specification are not limited to the specific designations used in the following figures.

[1135] Fig. 22 An example of operation according to an embodiment of the present specification is illustrated.

[1136] in addition, Fig. 22 The operations of the UE and the base station shown in the example are only examples. The operations of the UE are not limited to Fig. 22 examples, and the UE and the base station can perform the operations described in various examples of this specification.

[1137] In step S2201, the UE may set the power for transmitting an uplink signal. For example, the UE may determine the transmit power based on the UE's power class, MPR, Tx diversity, antenna isolation, etc. For example, the UE may apply the MPR according to the example of Table 11 or the example of Table 12. One or more MPRs among the MPRs according to the example of Table 11 or the example of Table 12 may be selectively applied.

[1138] For example, the transmit power may be determined based on a set MPR-based maximum output power. The power level of the UE may be power level 1.5. In this case, the MPR value may be determined based on a UE supporting 4Tx-based Tx diversity, and the antenna isolation for power level 1.5 and 4Tx is i) 10 dB or ii) 20 dB or greater.

[1139] For example, according to the examples in Tables 11 and 12, the MPR value may be determined based on whether DFT-s-OFDM or CP OFDM is used and whether Pi / 2BPSK, QPSK, 16QAM, 64QAM or 256QAM is used. For example, based on the use of DFT-s-OFDM, for edge RB allocation, the MPR value may be less than or equal to 8.0, 8.5, or 9.5. For example, the MPR value is based on the use of DFT-s-OFDM, for outer RB allocation: based on the use of Pi / 2BPSK, the MPR value may be equal to or less than 3.0 dB; based on the use of QPSK, the MPR value may be equal to or less than 3.5 dB; and based on the use of 16QAM, the MPR value may be equal to or less than 4.0 dB; and based on the use of 256QAM, the MPR value may be equal to or less than 7.0 dB. For example, the MPR value is based on the DFT-s-OFDM used, for inner RB allocation: based on using Pi / 2BPSK, the MPR value is less than 2.0dB, based on using QPSK, the MPR value is less than 2.0dB, based on using 16QAM, the MPR value is less than 2.5dB, and based on using 256QAM, the MPR value can be less than 7.0dB. For example, the MPR value can be: based on using CP-OFDM, for edge RB allocation, 9.5 or less. For example, based on using CP-OFDM, for outer RB allocation, the MPR value can be equal to or less than one of 5.0dB, 7.0dB, and 9.5dB. For example, based on which CP-OFDM is used, for inner RB allocation, the MPR value can be one of 3.5B, 4.0dB, 7.0dB, or 9.5dB or less.

[1140] For example, according to the examples in Tables 11 and 12, the MPR value may be determined based on whether DFT-s-OFDM or CP OFDM is used and whether Pi / 2BPSK, QPSK, 16QAM, 64QAM or 256QAM is used. For example, based on the use of DFT-s-OFDM, for edge RB allocation, the MPR value may be one of 8.0, 8.5, and 9.5 or less. For example, the above MPR values ​​are based on the use of the above DFT-s-OFDM, for inner RB allocation: based on the use of Pi / 2BPSK, the MPR value may be or less than 0.5dB, based on the use of QPSK, the MPR value may be 0.5dB or less, and based on the use of 16QAM, the MPR value may be 1.5dB or less. For example, based on the above CP-OFDM, the MPR value can be used for edge RB allocation: based on the use of QPSK, the MPR value is 8.0dB or less, based on the use of 16QAM, the above MPR value is 8.0dB or less, and based on the use of 64QAM, the MPR value can be 8.0dB or less. For example, based on the use of CP-OFDM, based on the use of 64QAM, for outer RB allocation, the MPR value can be less than or equal to one of 5.0dB. For example, based on the above CP-OFDM, the above MPR values ​​are used for inner RB allocation: based on the use of QPSK, the MPR value is 2.0dB or less, based on the use of 16QAM, the above MPR value should be 2.5dB or less, and based on the use of 64QAM, the above MPR value can be 5.0dB or less.

[1141] For example, the UE may configure the maximum output power P for carrier f of serving cell c in each time slot. CMAX，f，c . Configured maximum output power P CMAX，f，c Can be set in the following range:

[1142] P CMAX_L，f，c ≤P CMAX，f，c ≤P CMAX_H，f，c in,

[1143] P CMAX_L，f，c =MIN{P EMAX，c -T C，c , (P PowerClass -ΔP PowerClass -MAX(MAX(MPR c +MPR c , A-MPR c )+ΔT IB，c +T C，c +T RxSRs , P-MPR c )}

[1144] P CMAX_H，f，c =MIN{PEMAX，c , P PowerClass -ΔP PowerClass}

[1145] Here, MPR c MPR value according to an example of the present disclosure may be represented. Other parameters may be defined by 3GPP TS 38.101-1 V17.6.0.

[1146] For example, the UE may determine the transmit power (eg, P) for a physical random access channel (PRACH). PRACH，b，f，c (i)). Based on the downlink reference signal (DL-RS) of the serving cell c in the transmission normal i, the transmit power of the PRACH on the active UL BWP (bandwidth part) b of the carrier f of the serving cell c (e.g., P PRACH，b，f，c (i)) can be determined as follows:

[1147] P PRACHb，f，c (i) = min{P CMAX，f，c (i), P PRACH，target，f，c +PL b，f，c}[dBm],

[1148] Here, as mentioned above, P CMAX，f，c (i) may be the maximum output power set by the UE for carrier f of serving cell c at transmission opportunity i. PRACH，target，f，c is the PRACH target received power PRAMABLE_RECEIVED_TARGET_POWER provided at upper layers for the active UL BWP b of carrier f of serving cell c. b，f，c is the path loss of the active UL BWP b of carrier f based on the DL RS associated with the PRACH transmission in the active DLBWP of the serving cell, and PL b，f，c It is a value calculated by the UE in dBm based on RSRP (Reference Signal Power) filtered by an upper layer.

[1149] In step S2202, the UE may send a signal to the base station. For example, the UE may send an uplink signal to the base station based on the transmit power. For example, the UE may send a PRACH signal including a random access preamble to the base station based on the determined transmit power.

[1150] For reference, based on the MPR value according to an embodiment of the present specification, the UE may perform a random access procedure. For example, in one embodiment of the disclosure of the present specification, if RF requirements (e.g., Tx RF performance requirements and / or Rx RF performance requirements) are described, the UE may meet these RF requirements. For example, according to an embodiment of the disclosure of the present specification, the UE may be tested to meet the RF requirements (e.g., Tx RF performance requirements and / or Rx Rf performance requirements). In an embodiment of the present specification, a UE that meets such RF requirements may perform a RACH procedure. When the UE sends a message, data, signal, etc. to the gNB, the UE meets the Tx RF performance requirements described in one embodiment of the disclosure of the present specification. When the UE receives a message, data, signal, etc. from the gNB, the UE meets the Rx RF performance requirements described in one embodiment of the disclosure of the present specification.

[1151] In order to connect the UE to the 5G network, the UE and the 5G network must be synchronized in uplink and downlink. Downlink synchronization is performed when the UE successfully decodes the SSB sent by the gNB. In order to establish uplink synchronization and RRC connection, the UE can perform a RACH random access procedure.

[1152] The UE may send MSG1 (message 1) to the gNB based on the PRACH including the random access preamble. For example, the UE may determine the transmit power of the PRACH. For example, the UE may configure the maximum output power configured based on the MPR value according to the implementation of the disclosure of this specification, and determine the transmit power of the PRACH based on the configured maximum output power. After the UE sends MSG1, the UE may monitor the response of the network within the configured window. The UE may receive a random access response MSG2 from the gNB. The UE may then send MSG3 using the UL grant scheduled by the response message. In addition, the UE may monitor contention resolution. If contention resolution is not successful even after MSG3 (re)transmission, the UE performs MSG1 transmission again.

[1153] According to the embodiments of this specification, an MPR for 4Tx PC1.5 UE is proposed.

[1154] For example, an MPR according to the example in Table 11 is proposed. When the antenna isolation is 10 dB, the MPR according to the example in Table 11 may be applied. For example, a device having an antenna isolation of 10 dB may include a handheld UE / vehicle-mounted UE / industrial device.

[1155] For example, an MPR according to the example in Table 12 is proposed. When the antenna isolation is 20 dB or more, the MPR according to the example in Table 12 may be applied. For example, a device having an antenna isolation of 20 dB or more may include a FWA / CPE / industrial device.

[1156] For example, in addition to the MPR according to the example in Table 11 and the MPR according to the example in Table 12, an MPR considering the implementation margin may also be proposed.

[1157] According to the implementation of this specification, the terminal capability for a 4Tx UL-MIMO supporting terminal may be proposed. For example, the PA of the terminal may be configured as follows:

[1158] -23dBm+23dBm+23dBm+23dBm(Case 1)

[1159] -26dBm+26dBm+23dBm+23dBm(Case 2)

[1160] -26dBm+26dBm+26dBm+26dBm(Case 3)

[1161] According to an embodiment of the present specification, an MPR according to a PA configuration method and a UL-MIMO full power transmission mode may be proposed. For example, based on a UL-MIMO full power transmission mode (e.g., 'FullPwrMode', 'FullPwrMode1', 'FullPwrMode2', 'FullPwrMode3', and 'FullPwrMode4'), an MPR may be applied. According to a PA configuration method, a support mode may be set.

[1162] According to the implementation of the present specification, a Tx diversity support mode may be proposed. For example, 'txDiversity-r18'=2, 3, 4. For example, 2, 3, and 4 represent: 2Tx, 3Tx, and 4Tx, respectively.

[1163] According to an embodiment of the present specification, when a UL-MIMO supporting terminal transmits a signal to one antenna port, an MPR according to a Tx diversity supporting mode may be proposed. For example, the MPR may be applied as shown in the following example:

[1164] -When the terminal supports 2Tx as Tx diversity, an MPR value based on antenna isolation of 10 dB may be applied. For example, devices with antenna isolation of 10 dB may include handheld UE / vehicle UE / industrial devices. When the terminal supports 2Tx with Tx diversity, an MPR value based on a case where antenna isolation is 20 dB or greater may be applied. For example, devices with antenna isolation of 20 dB or greater may include FWA / CPE / industrial devices.

[1165] -When the terminal supports 4Tx as Tx diversity, an MPR value based on antenna isolation of 10dB may be applied. For example, devices with antenna isolation of 10dB may include handheld UE / vehicle UE / industrial devices. When the terminal supports 4Tx with Tx diversity, an MPR value based on a case where antenna isolation is 20dB or greater may be applied. For example, devices with antenna isolation of 20dB or greater may include FWA / CPE / industrial devices.

[1166] -When the terminal does not support Tx diversity, MPR can be applied.

[1167] According to an embodiment of the present specification, the terminal may apply MPR as shown in the following examples. For example, when the terminal supports Tx diversity, MPR may be applied. For example, MPR when the terminal supports UL-MIMO may be applied. For example, when the terminal supports both Tx diversity and UL-MIMO, MPR may be applied.

[1168] According to an implementation of the present specification, when a 4Tx UL-MIMO supporting terminal transmits 1Tx, the terminal power level may be defined according to the present specification.

[1169] The terminal can switch to one antenna port and transmit the signal (that is, when UL-MIMO is not set). In this case, the terminal that does not specify the 'txDiversity-r16' or 'txDiversity-r18' capability cannot support the corresponding ue_PowerClass. Therefore, it is recommended that the terminal notify the network of the power level information by switching its power level to a power level lower than its power level.

[1170] This description can have various effects.

[1171] For example, by defining RF performance standards for high-power terminals supporting the FR1 band (e.g., 29dBm high-power terminals based on 4Tx), communication between the network and the terminal can be ensured. In addition, 29dBm high-power terminals can be commercialized based on 4Tx.

[1172] The effects that can be obtained from the specific examples of the present disclosure are not limited to the effects listed above. For example, there may be various technical effects that a person of ordinary skill in the relevant art can understand or infer from the present disclosure. Therefore, the specific effects of the present disclosure are not limited to those effects explicitly set forth herein, but may include various effects that can be understood or inferred from the technical features of the present disclosure.

[1173] For reference, the operation of the terminal (eg, UE) described in the disclosure of this specification can be performed by Figures 1 to 3For example, a terminal (eg, UE) may be Figure 1 The first device 100 or the second device 200 of the present invention may be a first device 100 or a second device 200. For example, the operation of the terminal (e.g., UE) described in the disclosure of this specification may be processed by one or more processors 102 or 202. The operation of the terminal described in the disclosure of this specification may be stored in one or more memories 104 or 204 in the form of instructions / programs (e.g., instructions and executable codes) that can be executed by one or more processors 102 or 202. The one or more processors 102 or 202 may control the one or more memories 104 or 204 and the one or more transceivers 105 or 206 and execute the instructions / programs stored in the one or more memories 104 or 204 to perform the operation of the terminal (e.g., UE) described in the disclosure of this specification.

[1174] In addition, instructions for performing the operations of the terminal (e.g., UE) described in the disclosure of this specification may be stored in a non-volatile computer-readable storage medium. The storage medium may be included in one or more memories 104 or 204. In addition, the instructions recorded in the storage medium may be executed by one or more processors 102 or 202 to perform the operations of the terminal (e.g., UE) described in the disclosure of this specification.

[1175] For reference, the operations of the network nodes or base stations (eg, NG-RAN, gNB, eNB, etc.) described in the disclosure of this specification may be described below. Figures 1 to 3 For example, a network node or base station may be Figure 1 The first device 100a or the second device 100b of the present invention may be a first device 100a or a second device 100b. For example, the operation of the network node or base station described in the disclosure of this specification may be processed by one or more processors 102 or 202. The operation of the network node or base station described in the disclosure of this specification may be stored in one or more memories 104 or 204 in the form of instructions / programs (e.g., instructions and executable codes) that can be executed by one or more processors 102 or 202. The one or more processors 102 or 202 may control the one or more memories 104 or 204 and the one or more transceivers 106 or 206 and execute the instructions / programs stored in the one or more memories 104 or 204 to perform the operation of the network node or base station described in the disclosure of this specification.

[1176] In addition, instructions for executing the operations of the NTN network described in the disclosure of this specification may be stored in a non-volatile (or non-transitory) computer-readable storage medium. The storage medium may be included in one or more memories 104 or 204. In addition, the instructions recorded in the storage medium may be executed by one or more processors 102 or 202 to execute the operations of the NTN network described in the disclosure of this specification.

[1177] Although the preferred embodiment has been described above, the disclosure of this specification is not limited to such specific embodiment and thus may be modified, changed or improved in various ways within the spirit of the disclosure of this specification and the scope of the claims.

[1178] Although the method is described as a series of steps or blocks based on the flowchart in the exemplary system described above, they are not limited to the order of the steps described, and some steps may occur in a different order or simultaneously with other steps described above. In addition, those skilled in the art will understand that the steps shown in the flowchart are not exclusive, and other steps may be included or one or more steps of the flowchart may be deleted without affecting the scope of authority.

[1179] The claims described herein may be combined in various ways. For example, the technical features of the method claims of the disclosure of this specification may be combined and implemented as a device, and the technical features of the device claims of the disclosure of this specification may be combined and implemented as a method. In addition, the technical features of the method claims of the disclosure of this specification and the technical features of the device claims may be combined and implemented as a device, and the technical features of the method claims of the disclosure and the technical features of the device claims may be combined and implemented as a method. Other implementations are within the scope of the attached claims.

Claims

1. A user equipment (UE) configured to operate in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; as well as at least one memory storing instructions and being operatively connected to the at least one processor, The operations performed by the at least one processor based on the instruction include: determining a transmit power; and transmitting an uplink signal based on the transmit power, wherein the transmit power is determined based on a maximum output power configured according to a maximum power reduction MPR, The power level of the UE is power level 1.

5. The UE supports Tx diversity based on 4 Tx transmissions, and The MPR value is determined based on the power level 1.5 and based on the antenna isolation for the 4Tx being i) 10 dB or ii) 20 dB or greater.

2. The UE according to claim 1, Based on the antenna isolation of 10dB, in, The MPR value is determined based on whether discrete Fourier transform spread orthogonal frequency division multiplexing OFDM DFT-s-OFDM or cyclic prefix OFDM CP OFDM is used, and whether Pi / 2 binary phase shift keying BPSK, quadrature phase shift keying QPSK, 16 quadrature amplitude modulation QAM, 64QAM or 256QAM is used.

3. The UE according to claim 2, in, Based on using the DFT-s-OFDM, for edge RB allocation, the MPR value is equal to or less than one of 8.0 dB, 8.5 dB, and 9.5 dB.

4. The UE according to claim 2, Based on using the DFT-s-OFDM, for outer RB allocation, where, The MPR value: Based on the use of the Pi / 2BPSK, equal to or less than 3.0dB, Based on the use of the QPSK, equal to or less than 3.5dB, Based on the use of the 16QAM, equal to or less than 4.0dB, and Based on the use of the 256QAM, equal to or less than 7.0 dB.

5. The UE according to claim 2, Based on using the DFT-s-OFDM, for inner RB allocation, where, The MPR value: Based on the use of the Pi / 2BPSK, equal to or less than 2.0dB, Based on the use of the QPSK, equal to or less than 2.0dB, Based on the use of the 16QAM, equal to or less than 2.5dB, and Based on the use of the 256QAM, equal to or less than 7.0 dB.

6. The UE according to claim 2, wherein: Based on using the CP-OFDM, for edge RB allocation, the MPR value is equal to or less than 9.5 dB.

7. The UE according to claim 2, wherein: Based on using the CP-OFDM, for outer RB allocation, the MPR value is equal to or less than one of 5.0 dB, 7.0 dB, and 9.5 dB.

8. The UE according to claim 2, in, Based on using the CP-OFDM, for inner RB allocation, the MPR value is equal to or less than one of 3.5 dB, 4.0 dB, 7.0 dB, or 9.5 dB.

9. The UE according to claim 1, Based on the antenna isolation being equal to or greater than 20 dB, in, The MPR value is determined based on whether DFT-s-OFDM or CP OFDM is used and whether Pi / 2BPSK, QPSK, 16QAM, 64QAM or 256QAM is used.

10. The UE according to claim 9, in, Based on using the DFT-s-OFDM, for edge RB allocation, the MPR value is equal to or less than one of 8.0 dB, 8.5 dB, and 9.5 dB.

11. The UE according to claim 9, Based on using the DFT-s-OFDM, for inner RB allocation, where, The MPR value: Based on the use of the Pi / 2BPSK, equal to or less than 0.5dB, Based on the use of the QPSK, equal to or less than 0.5 dB, and Based on the use of the 16QAM, equal to or less than 1.5dB.

12. The UE according to claim 9, Based on the use of the CP-OFDM, for edge RB allocation, where, The MPR value: Based on the use of the QPSK, equal to or less than 8.0dB, Based on the use of the 16QAM, equal to or less than 8.0 dB, and Based on using the 64QAM, equal to or less than 8.0 dB.

13. The UE according to claim 12, Based on using the CP-OFDM, for outer RB allocation, where, Based on using the CP-OFDM, the MPR value is equal to or less than 5.0 dB.

14. The UE according to claim 9, Based on using the CP-OFDM, for inner RB allocation, where, The MPR value: Based on the use of the QPSK, equal to or less than 2.0dB, Based on the use of the 16QAM, equal to or less than 2.5dB, and Based on using the 64QAM, equal to or less than 5.0dB.

15. A method for performing communication, the method being performed by a user equipment UE and comprising the following steps: Determine the transmit power; as well as transmitting an uplink signal based on the transmit power, wherein the transmit power is determined based on a maximum output power configured according to a maximum power reduction MPR, The power level of the UE is power level 1.

5. The UE supports Tx diversity based on 4 Tx transmissions, and The MPR value is determined based on the power level 1.5 and based on the antenna isolation for the 4Tx being i) 10 dB or ii) 20 dB or greater.

16. A device in a wireless communication system, the device comprising: Determine the transmit power; as well as transmitting an uplink signal based on the transmit power, wherein the transmit power is determined based on a maximum output power configured according to a maximum power reduction MPR, Wherein, the power level of the device is power level 1.5, The device supports Tx diversity based on 4-transmission Tx, and The MPR value is determined based on the power level 1.5 and based on the antenna isolation for the 4Tx being i) 10 dB or ii) 20 dB or greater.

17. A non-transitory computer readable medium (CRM) storing instructions, the instructions being executed by at least one processor to perform operations, the operations comprising: Determine the transmit power; as well as transmitting an uplink signal based on the transmit power, wherein the transmit power is determined based on a maximum output power configured according to a maximum power reduction MPR, Among them, the power level of the device is power level 1.5, The device supports Tx diversity based on 4-transmission Tx, and The MPR value is determined based on the power level 1.5 and based on the antenna isolation for the 4Tx being i) 10 dB or ii) 20 dB or greater.

18. A user equipment (UE) configured to operate in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; as well as at least one memory storing instructions and being operatively connected to the at least one processor, The operations performed by the at least one processor based on the instruction include: determining a transmit power for a physical random access channel PRACH; and transmitting a PRACH signal including a random access preamble based on the transmit power, wherein the transmit power is determined based on a maximum output power configured according to a maximum power reduction MPR, The power level of the UE is power level 1.

5. The UE supports Tx diversity based on 4 Tx transmissions, and The MPR value is determined based on the power level 1.5 and based on the antenna isolation for the 4Tx being i) 10 dB or ii) 20 dB or greater.

19. A method performed by a user equipment UE, the method comprising the following steps: determining a transmit power for a physical random access channel PRACH; and transmitting a PRACH signal including a random access preamble based on the transmit power, wherein the transmit power is determined based on a maximum output power configured according to a maximum power reduction MPR, The power level of the UE is power level 1.

5. The UE supports Tx diversity based on 4 Tx transmissions, and The MPR value is determined based on the power level 1.5 and based on the antenna isolation for the 4Tx being i) 10 dB or ii) 20 dB or greater.

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