Method and apparatus for capability signaling to enable maximum power uplink transmissions

Abstract

A method for operating a user equipment (UE) includes the steps of: transmitting UE capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey a maximum power; receiving configuration information for a physical uplink shared channel (PUSCH) transmission; receiving a TPMI indicating a precoding matrix and a number of layers for the PUSCH transmission; determining a PUSCH transmission based on the configuration information; determining a power level for the PUSCH transmission, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey the maximum power; and transmitting the PUSCH transmission at the determined power level.

Description

[Technical Field]

[0001] The present invention relates to wireless communication systems, and more particularly to capability signaling that enables full power uplink transmissions. [Background technology]

[0002] To meet the increased demand for wireless data traffic after the deployment of fourth-generation (4G) communication systems, efforts have been made to develop improved fifth-generation (5G) or pre-5G communication systems. 5G or Pre-5G communication systems are also referred to as "beyond 4G networks" or "post-LTE (post long term evolution) systems." 5G communication systems are expected to be implemented in higher frequency (mmWave) bands, for example, the 60 GHz band, to achieve higher data rates. To reduce radio wave propagation loss and extend transmission distances, beamforming, massive MIMO (multiple-input multiple-output), full dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antenna techniques are being discussed for 5G communication systems. Furthermore, developments are underway to improve the system network based on next-generation small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, moving networks, cooperative communications, coordinated multi-points (CoMP), and receiver interference cancellation. Hybrid frequency shift keying (FSK) is also being implemented in 5G systems. Keying), Feher's quadrature amplitude modulation (FQAM), and sliding window superposition coding (SWSC) were developed as advanced coding modulation (ACM), while filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) were developed as advanced access technologies.

[0003] The Internet, a human-centered network of connectivity where humans generate and consume information, is evolving into the Internet of Things (IoT), where distributed entities like things exchange and process information without human intervention. The Internet of Everything (IoE) has emerged, combining IoT technology and big data processing technology through connections with cloud servers. As technological elements like the Internet of Things (IoT), where technology connects humans and consume information, evolve into the Internet of Things (IoT), where cloud servers embody IoT, sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC) are being researched. This IoT environment can provide intelligent Internet technology services that create new value in human life by collecting and analyzing data generated between connected things. Through the convergence and combination of existing information technology (IT) and various industrial applications, the IoT can be applied to a variety of fields, including smart homes, smart buildings, smart cities, smart or connected vehicles, smart grids, healthcare, smart home appliances, and next-generation medical services.

[0004] Accordingly, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, MTC, and M2M communication are being implemented using beamforming, MIMO, and array antennas. The application of Cloud RAN as a big data processing technology is also seen as an example of the convergence of 5G and IoT technologies. Summary of the Invention [Means for solving the problem]

[0005] The present invention provides a method and apparatus for maximum power UL MIMO operation in a wireless communication system.

[0006] For a more complete understanding of the present invention and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals indicate like parts and in which: [Brief explanation of the drawings]

[0007] [Figure 1] 1 illustrates an exemplary wireless network in accordance with an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating an exemplary gNB according to an embodiment of the present invention. [Figure 3] 1 is a diagram illustrating an exemplary user equipment (UE) according to an embodiment of the present invention. [Figure 4A] 1 is a high-level diagram of an orthogonal frequency division multiple access transmit path according to an embodiment of the present invention. [Figure 4B] 1 is a high-level diagram of an orthogonal frequency division multiple access receive path according to an embodiment of the present invention. [Figure 5] FIG. 2 is a transmitter block diagram for a physical DL shared channel (PDSCH) in a subframe according to an embodiment of the present invention. [Figure 6] FIG. 1 is a receiver block diagram for PDSCH in a subframe according to an embodiment of the present invention. [Figure 7] FIG. 2 is a transmitter block diagram for a physical uplink shared channel (PUSCH) in a subframe according to an embodiment of the present invention. [Figure 8] FIG. 1 is a receiver block diagram for PUSCH in a subframe according to an embodiment of the present invention; [Figure 9] 1 illustrates an exemplary network configuration according to an embodiment of the present invention. [Figure 10] 1 is a diagram illustrating an exemplary multiplexing of two slices according to an embodiment of the present invention. [Figure 11]1 is a diagram illustrating an example of a beam according to an embodiment of the present invention. [Figure 12] 4 is a flowchart of a method for operating a UE according to an embodiment of the present invention. [Figure 13] 4 is a flowchart of a method of operating a BS according to an embodiment of the present invention. [Figure 14] 1 is a diagram illustrating a base station according to an embodiment of the present invention. [Figure 15] 1 is a diagram illustrating a user equipment (UE) according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] In one embodiment, a UE in a wireless communication system is provided. The UE includes a transceiver unit configured to transmit UE capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power; receive configuration information for physical uplink shared channel (PUSCH) transmission; and receive the TPMI indicating a precoding matrix and a number of layers for the PUSCH transmission. The UE further includes a processor operatively coupled to the transceiver unit. The processor is configured to determine a PUSCH transmission based on the configuration information and to determine a power level for the PUSCH transmission, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey maximum power. The transceiver unit is further configured to transmit the PUSCH transmission at the determined power level.

[0009] In another embodiment, a BS of a wireless communication system is provided. The BS includes a transceiver configured to receive user equipment (UE) capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power. The BS further includes a processor operatively coupled to the transceiver. The processor is configured to generate configuration information for physical uplink shared channel (PUSCH) transmissions and generate the TPMI indicating a precoding matrix and number of layers for the PUSCH transmission. The transceiver is further configured to transmit the configuration information for the PUSCH transmission, transmit the TPMI, and receive the PUSCH transmission transmitted at a power level, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey maximum power.

[0010] In yet another embodiment, a method of operating a UE is provided, the method including: transmitting UE capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey a maximum power; receiving configuration information for a physical uplink shared channel (PUSCH) transmission, receiving the TPMI indicating a precoding matrix and a number of layers for the PUSCH transmission, determining a PUSCH transmission based on the configuration information; determining a power level for the PUSCH transmission, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey the maximum power; and transmitting the PUSCH transmission at the determined power level.

[0011] According to one embodiment of the present invention, there is provided a UE for capability signaling enabling maximum power uplink transmission, the UE including: a transceiver configured to transmit UE capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power; receive configuration information for a physical uplink shared channel (PUSCH) transmission; and receive a TPMI indicating a precoding matrix and a number of layers for the PUSCH transmission; and a processor operatively coupled to the transceiver to determine the PUSCH transmission based on the configuration information and to determine a power level for the PUSCH transmission, where if the TPMI is included in one of the plurality of TPMI groups that convey maximum power, the power level corresponds to the maximum power; and the transceiver configured to transmit the PUSCH transmission at the determined power level.

[0012] In this embodiment, the UE capability information further includes a coherence capability of an antenna port in the UE, where the coherence capability is one of non-coherent, partial-coherent, or full-coherent.

[0013] In this embodiment, when the UE has four antenna ports and the coherence capability corresponds to non-coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, and a TPMI group relating to two antenna ports and including a non-coherent TPMI.

[0014] In this embodiment, when the UE has four antenna ports and the coherence capability corresponds to partial coherence, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0015] In this embodiment, when the UE has four antenna ports and the coherence capability corresponds to fully coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0016] According to one embodiment of the present invention, there is provided a base station for capability signaling to enable maximum power uplink transmission, the base station including: a transceiver configured to receive user equipment (UE) capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power; and a processor operatively coupled to the transceiver, the processor configured to generate configuration information for physical uplink shared channel (PUSCH) transmission and generate the TPMI indicating a precoding matrix and a number of layers for the PUSCH transmission, the transceiver further configured to transmit the configuration information for the PUSCH transmission, transmit the TPMI, and receive the PUSCH transmission transmitted at a power level, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey maximum power.

[0017] In this embodiment, the UE capability information further includes a coherence capability of an antenna port at the UE, where the coherence capability is one of non-coherent, partially coherent, or fully coherent.

[0018] In this embodiment, when the UE has four antenna ports and the coherence capability corresponds to non-coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, and a TPMI group relating to two antenna ports and including a non-coherent TPMI.

[0019] In this embodiment, when the UE has four antenna ports and the coherence capability corresponds to partial coherence, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0020] In this embodiment, when the UE has four antenna ports and the coherence capability corresponds to fully coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0021] According to one embodiment of the present invention, there is provided a method for capability signaling enabling maximum power uplink transmission, the method including: transmitting UE capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power; receiving configuration information for physical uplink shared channel (PUSCH) transmission; receiving a TPMI indicating a precoding matrix and a number of layers for the PUSCH transmission; determining a PUSCH transmission based on the configuration information; determining a power level for the PUSCH transmission, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey maximum power; and transmitting the PUSCH transmission at the determined power level.

[0022] In this embodiment, the UE capability information further includes a coherence capability of an antenna port at the UE, where the coherence capability is one of non-coherent, partially coherent, or fully coherent.

[0023] In this embodiment, when the UE has four antenna ports and the coherence capability corresponds to non-coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, and a TPMI group relating to two antenna ports and including a non-coherent TPMI.

[0024] Other technical features will be readily apparent to those of ordinary skill in the art from the following drawings, descriptions and claims.

[0025] Prior to the detailed description that follows, it is advantageous to refer to definitions of certain words and phrases used throughout this specification. The term "couple" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether they are in physical contact with one another. The terms "transmit," "receive," and "communicate," as well as their derivatives, include both direct and indirect communication. The terms "comprise" and "include," as well as their derivatives, refer to an open-ended inclusion. The term "or" is inclusive and means "and / or." The term "associated with," as well as its derivatives, refers to including, contained within, interconnected with, containing, housed within, connected to or with, coupled to or with, communicable with, cooperate with, interleave with, collocated with, adjacent to, connected to or with, having, having a characteristic of, relating to or with, etc. The term "controller" means any device, system, or portion thereof that controls at least one operation. Such a controller may be embodied in hardware, or a combination of hardware and software and / or firmware. The functionality associated with any particular controller may be local or remote, centralized or distributed. The phrase "at least one of," when used in conjunction with a list of items, means that different combinations of one or more of the listed items may be used, and that only any one item in the list is required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, A and B and C.

[0026] Additionally, the various functions described below may also be embodied or supported by one or more computer programs, each of which is formed from computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, associated data, or portions thereof suitable for implementation in suitable computer-readable program code. The term "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The term "computer-readable medium" includes any type of medium accessible by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, compact disc (CD), digital video disc (DVD), or any other type of memory. "Non-transitory" computer-readable medium excludes wired, wireless, optical, or other communication links transmitting transient electrical or other signals. Non-transitory computer-readable media include media on which data can be permanently stored and media on which data can be stored and later overwritten, such as rewritable optical disks or erasable memory devices.

[0027] Definitions for other specific words and phrases are provided throughout this specification, and one of ordinary skill in the art should understand that in many, if not most, cases, such definitions apply to previous and future uses of the words and phrases so defined.

[0028] 1-15 discussed below and the various embodiments used herein to explain the principles of the present invention are merely exemplary and should not be construed as limiting the scope of the invention in any way. Those of ordinary skill in the art will understand that the principles of the present invention may be embodied in any suitably arranged system or device.

[0029] The descriptions in the following documents and standards are incorporated by reference into the present invention as if fully set forth herein: 3GPP TS 36.211 v16.5.0, "E-UTRA, Physical channels and modulation" (REF 1 in the present invention); 3GPP TS 36.212 v16.5.0, "E-UTRA, Multiplexing and Channel coding" (REF 2 in the present invention); 3GPP TS 36.213 v16.5.0, "E-UTRA, Physical Layer Procedures" (REF 3 in the present invention); 3GPP TS 36.321 v16.4.0, "E-UTRA, Medium Access Control (MAC) protocol specification" (REF 4 in the present invention); 3GPP TS 36.331 v16.4.0, "E-UTRA, Radio Resource Control (RRC) protocol specification" (REF 5 in the present invention); 3GPP TS 38.211 v16.5.0, "NR, Physical channels and modulation" (REF 6 in the present invention); 3GPP TS 38.212 v16.5.0, "NR, Multiplexing and Channel coding" (REF 7 in the present invention); 3GPP TS 38.213 v16.4.0, "NR, Physical Layer Procedures for Control" (REF 8 in the present invention); 3GPP TS 38.214 v16.4.0, "NR, Physical Layer Procedures for Data" (REF 9 in the present invention); 3GPP TS 38.215 v16.4.0, "NR, Physical Layer Measurements" (REF 10 in the present invention); 3GPP TS 38.321 v16.4.0, "NR, Medium Access Control (MAC) protocol specification" (REF 11 in this invention); and 3GPP TS 38.331 v16.4.1, "NR, Radio Resource Control (RRC) Protocol Specification" (REF 12 in this invention).

[0030] The aspects, features, and advantages of the present invention will become readily apparent from the following detailed description, simply by illustrating several specific embodiments and implementations, including the best mode contemplated for carrying out the invention. The present invention is capable of other and different embodiments, and its many details can be modified in various obvious aspects, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not restrictive. The invention is illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings.

[0031] Hereinafter, for simplicity, both FDD and TDD will be considered as duplex methods of signaling both DL and UL.

[0032] Although the exemplary descriptions and embodiments described below assume orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA), the present invention can be extended to other OFDM-based transmit waveforms or multiple access schemes, such as filtered OFDM (F-OFDM).

[0033] 5G / NR communication systems have been developed and are currently being deployed to meet the increased demand for wireless data traffic after the deployment of 4G communication systems and to enable a variety of vertical applications. 5G / NR communication systems are being considered for implementation in higher frequency (mmWave) bands, such as the 28 GHz or 60 GHz bands, to achieve higher data rates, or in lower frequency bands such as 6 GHz to enable robust coverage and mobility support. To reduce radio wave propagation loss and extend transmission distances, beamforming, massive MIMO (multiple-input multiple-output), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antenna techniques are being discussed for 5G / NR communication systems.

[0034] In addition, in the 5G / NR communication system, developments are underway to improve the system network based on next-generation small cells, cloud RAN (radio access networks), ultra-dense networks, D2D (device-to-device) communication, wireless backhaul, moving networks, cooperative communication, CoMP (coordinated multi-points), and receiver-end interference cancellation.

[0035] Understanding and accurately estimating the UL channel between a user equipment (UE) and a gNode B (gNB) is important for efficient and effective wireless communication. To accurately estimate the UL channel conditions, the UE can transmit a reference signal, e.g., an SRS, to the gNB for UL channel measurements. Such UL channel measurements enable the gNB to select appropriate communication parameters for efficient and effective wireless data communication with the UE in the UL.

[0036] The discussion of 5G systems and their associated frequency bands is for reference only, as certain embodiments of the present invention may also be embodied in 5G systems. However, the present invention is not limited to 5G systems or their associated frequency bands, and embodiments of the present invention may be utilized in connection with any frequency band. For example, aspects of the present invention may also be applied to the deployment of 5G communication systems, 6G, or later releases capable of using terahertz (THz) bands.

[0037] The following Figures 1-4B illustrate various embodiments implemented using Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques in a wireless communication system. The descriptions in Figures 1-3 are not intended to imply physical or architectural limitations on how different embodiments may be implemented. Different embodiments of the present invention may be implemented in any suitably arranged communication system. The present invention may cover multiple components that may be used in conjunction with or in combination with each other, or may operate as standalone schemes.

[0038] Figure 1 illustrates an exemplary wireless network in accordance with an embodiment of the present invention. The embodiment of the wireless network illustrated in Figure 1 is for illustrative purposes only. Other embodiments of wireless network 100 may be used without departing from the scope of the present invention.

[0039] 1, the wireless network includes gNB 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0040] gNB 102 provides wireless broadband access to network 130 for a plurality of first user equipments (UEs) within gNB 102's coverage area 120. The plurality of first UEs includes UE 111, which may be located at a small business (SB), UE 112, which may be located at an enterprise (E), UE 113, which may be located at a Wi-Fi hotspot (HS), UE 114, which may be located at a first residence (R), UE 115, which may be located at a second residence (R), and UE 116, which may be a mobile device (M), e.g., a cell phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a plurality of second UEs within gNB 103's coverage area 125. The plurality of second UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and UEs 111-116 using 5G, LTE, LTE-A, WiMAX, Wi-Fi, or other wireless communication techniques.

[0041] Depending on the network type, the terms "base station" or "BS" refer to any component (or collection of components) configured to serve a network, e.g., a transmit point (TP), transmit-receive point (TRP), enhanced base station (eNodeB or eNB), 5G base station (gNB), macrocell, femtocell, Wi-Fi access point (AP), or other wireless-enabled device. A base station may provide wireless access via one or more wireless communication protocols, e.g., 5G 3GPP® New Radio Interface / Access (NR), long term evolution (LTE), LTE advanced (LTE-A), high speed packet access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" and "TRP" are used interchangeably herein to refer to network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, the terms "user equipment" or "UE" may refer to any component such as a "mobile station," "subscribing station," "remote terminal," "wireless terminal," "receiving point," or "user device." For convenience, the terms "user equipment" and "UE" are used herein to refer to remote wireless equipment that wirelessly accesses a BS, whether the UE is generally considered a mobile device (e.g., a mobile phone or smartphone) or a fixed device (e.g., a desktop computer or vending machine).

[0042] Dashed lines indicate the approximate extent of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, e.g., coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0043] As described in more detail below, one or more of the UEs 111 to 116 may include circuitry, programming, or a combination thereof for transmitting UE capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey a maximum power; receiving configuration information for physical uplink shared channel (PUSCH) transmission; receiving the TPMI indicating a precoding matrix and number of layers for the PUSCH transmission; determining a PUSCH transmission based on the configuration information; determining a power level for the PUSCH transmission, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey the maximum power; and transmitting the PUSCH transmission at the determined power level. At least one of the gNBs 101 to 103 receives user equipment (UE) capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power. The gNBs include circuitry, programming, or a combination thereof for receiving the UE capability information, generating configuration information for physical uplink shared channel (PUSCH) transmission, generating a TPMI that indicates a precoding matrix and number of layers for the PUSCH transmission, generating the configuration information for the PUSCH transmission, generating the TPMI, and receiving a PUSCH transmission transmitted at a power level, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey maximum power.

[0044] While Figure 1 illustrates an example wireless network, various modifications may be made to Figure 1. For example, a wireless network may include any number of gNBs and any number of UEs in any suitable arrangement. Furthermore, gNB 101 may directly communicate with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each of gNBs 102-103 may directly communicate with network 130 and provide those UEs with direct wireless broadband access to network 130. Furthermore, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0045] Figure 2 illustrates an exemplary gNB 102 according to an embodiment of the present invention. The embodiment of gNB 102 illustrated in Figure 2 is for illustrative purposes only, and gNBs 101 and 103 of Figure 1 may have the same or similar configurations. However, gNBs come in a wide variety of configurations, and Figure 2 does not limit the scope of the present invention to any particular implementation of a gNB.

[0046] 2, gNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220. gNB 102 also includes a controller / processor 225, memory 230, and a backhaul or network interface 235.

[0047] The RF transceivers 210a-210n receive incoming RF signals, such as signals transmitted by UEs in the network 100, from the antennas 205a-205n. The RF transceivers 210a-210n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are transmitted to the RX processing circuitry 220, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 220 transmits the processed baseband signals to the controller / processor 225 for further processing.

[0048] TX processing circuitry 215 receives analog or digital data (e.g., voice data, web data, email, or interactive video game data) from control unit / processor 225. TX processing circuitry 215 encodes, multiplexes, and / or digitizes outgoing baseband data and generates processed baseband or IF signals. RF transceivers 210a-210n receive the outgoing processed baseband or IF signals from TX processing circuitry 215 and upconvert the baseband or IF signals to RF signals that are transmitted via antennas 205a-205n.

[0049] The controller / processor 225 may also include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may, in accordance with well-known principles, control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functions.

[0050] For example, the controller / processor 225 may support beamforming or directional routing operations in which transmitted signals from multiple antennas 205a-205n are weighted differently to effectively steer the transmitted signals in a desired direction. Any of a wide variety of other functions may also be supported by the controller / processor 225 in the gNB 102.

[0051] Controller / processor 225 may also execute programs and other processes resident in memory 230, such as an operating system (OS). Controller / processor 225 may move data into or out of memory 230 as required by the executing processes.

[0052] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems over a backhaul connection or over a network. The interface 235 may support communication over any suitable wired or wireless connection. For example, when the gNB 102 is embodied as part of a cellular communication system (e.g., one supporting 5G, LTE, or LTE-A), the interface 235 may allow the gNB 102 to communicate with other gNBs over a wired or wireless backhaul connection. When the gNB 102 is embodied as an access point, the interface 235 may allow the gNB 102 to communicate over a wired or wireless local area network, or over a wired or wireless connection to a larger network (e.g., the Internet). The interface 235 includes any suitable structure, e.g., an Ethernet or RF transceiver, that supports communication over a wired or wireless connection.

[0053] The memory 230 is coupled to the controller / processor 225. A portion of the memory 230 includes RAM, and another portion of the memory 230 includes flash memory or other ROM.

[0054] While FIG. 2 illustrates an example of a gNB 102, various modifications may be made to FIG. 2. For example, the gNB 102 may include any number of each of the components illustrated in FIG. 2. As a particular example, an access point may include multiple interfaces 235, and the controller / processor 225 may support a routing function for routing data between different network addresses. As another particular example, while shown as including a single instance of the TX processing circuit 215 and a single instance of the RX processing circuit 220, the gNB 102 may include multiple instances of each (e.g., one per RF transceiver). Additionally, various components of FIG. 2 may be combined, further subdivided, or omitted, and additional components may be added as desired.

[0055] Figure 3 illustrates an exemplary UE 116 according to an embodiment of the present invention. The embodiment of UE 116 illustrated in Figure 3 is for illustrative purposes only, and UEs 111-115 of Figure 1 may have the same or similar configuration. However, UEs come in a wide variety of configurations, and Figure 3 does not limit the scope of the present invention to any particular implementation of a UE.

[0056] 3, the UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a TX processing circuit 315, a microphone 320, and a receive (RX) processing circuit 325. The UE 116 also includes a speaker 330, a processor 340, an input / output (I / O) interface (IF) 345, a touch screen 350, a display 355, and memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0057] The RF transceiver 310 receives incoming RF signals transmitted by gNBs in the network 100 from the antenna 305. The RF transceiver 310 downconverts the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signals are transmitted to the RX processing circuitry 325, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 325 transmits the processed baseband signals to a speaker 330 (e.g., for voice data) or to a processor 340 (e.g., for web browsing data) for further processing.

[0058] TX processing circuitry 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (e.g., web data, email, or interactive video game data) from processor 340. TX processing circuitry 315 encodes, multiplexes, and / or digitizes the outgoing baseband data and generates a processed baseband or IF signal. RF transceiver 310 receives the processed baseband or IF signal from TX processing circuitry 315 and upconverts the baseband or IF signal to an RF signal that is transmitted via antenna 305.

[0059] The processor 340 may include one or more processors or other processing devices and may execute an OS 361 stored in memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 310, the RX processing circuitry 325, and the TX processing circuitry 315 in accordance with well-known principles. In some embodiments, the processor 340 includes at least one processor or microcontroller.

[0060] The processor 340 may also execute other processes and programs resident in the memory 360, such as processes for transmitting UE capability information including a maximum power transmission capability, the maximum power transmission capability including information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey a maximum power; receiving configuration information for a physical uplink shared channel (PUSCH) transmission; receiving a TPMI indicating a precoding matrix and number of layers for the PUSCH transmission; determining a PUSCH transmission based on the configuration information; determining a power level for the PUSCH transmission, where the power level corresponds to the maximum power if the TPMI is included in one of the plurality of TPMI groups that convey a maximum power; and transmitting the PUSCH transmission at the determined power level. The processor 340 may move data in or out of the memory 360 as required by the executing processes. In some embodiments, the processor 340 is configured to execute an application 362 based on an OS 361 or in response to a signal received from the gNB or an operator. The processor 340 is also coupled to an I / O interface 345, which provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0061] Processor 340 is also coupled to a touchscreen 350 and a display 355. An operator of UE 116 can use touchscreen 350 to input data into UE 116. Display 355 can be a liquid crystal display, a light emitting diode display, or other display capable of rendering text and / or at least limited graphics, for example, from a website.

[0062] Memory 360 is coupled to processor 340. A portion of memory 360 includes random access memory (RAM), and another portion of memory 360 includes flash memory or other read-only memory (ROM).

[0063] While Figure 3 illustrates an example of a UE 116, various modifications may be made to Figure 3. For example, various components in Figure 3 may be combined, further subdivided, or omitted, and additional components may be added according to particular needs. As a particular example, the processor 340 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Also, while Figure 3 illustrates the UE 116 configured as a mobile phone or smartphone, the UE may be configured to operate as other types of mobile or stationary devices.

[0064] FIG. 4A is a high-level diagram of transmit path circuitry. For example, the transmit path circuitry may be used for orthogonal frequency division multiple access (OFDMA) communications. FIG. 4B is a high-level diagram of receive path circuitry. For example, the receive path circuitry may be used for orthogonal frequency division multiple access (OFDMA) communications. In FIGS. 4A and 4B, for downlink communications, the transmit path circuitry is embodied in a base station (gNB) 102 or a relay station, and the receive path circuitry is embodied in user equipment (e.g., user equipment 116 of FIG. 1). In another example, for uplink communications, the receive path circuitry 450 is embodied in a base station (e.g., gNB 102 of FIG. 1) or a relay station, and the transmit path circuitry is embodied in user equipment (e.g., user equipment 116 of FIG. 1).

[0065] The transmit path circuitry includes a channel coding and modulation block 405, a serial-to-parallel (S-to-P) block 410, a size-N Inverse Fast Fourier Transform (IFFT) block 415, a parallel-to-serial (P-to-S) block 420, a cyclic prefix (CP) addition block 425, and an up-converter (UC) 430. The receive path circuitry 450 includes a down-converter (DC) 455, a CP removal block 460, a serial-to-parallel (S-to-P) block 465, a size-N Fast Fourier Transform (FFT) block 470, a parallel-to-serial (P-to-S) block 475, and a channel decoding and demodulation block 480.

[0066] 4A and 4B (400 in FIG. 4A and 450 in FIG. 4B) are implemented in software, while other components may be implemented in configurable hardware or a mixture of software and configurable hardware. In particular, it is noted that the FFT and IFFT blocks described herein are implemented as configurable software algorithms, where the value of size N is modifiable depending on the implementation.

[0067] Furthermore, while the present invention is directed to embodiments implementing fast Fourier transforms and inverse fast Fourier transforms, this is merely exemplary and should not be construed as limiting the scope of the present invention. In alternative embodiments of the present invention, it may be understood that the fast Fourier transform and inverse fast Fourier transform functions are readily replaced by discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions, respectively. It may be understood that for DFT and IDFT functions, the value of the N variable may be any integer (i.e., 1, 4, 3, 4, etc.), while for FFT and IFFT functions, the value of the N variable may be any integer that is a power of 2 (i.e., 1, 2, 4, 8, 16, etc.).

[0068] In the transmit path circuitry 400, the channel coding and modulation block 405 receives a set of information bits, applies coding (e.g., LDPC coding), and modulates (e.g., quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) the input bits to generate a sequence of frequency-domain modulation symbols. The serial-to-parallel block 410 converts (i.e., demultiplexes) the serially modulated symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used by the BS 102 and the UE 116. The size-N IFFT block 415 then performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. The parallel-to-serial block 420 converts (i.e., multiplexes) the parallel time-domain output symbols from the size-N IFFT block 415 to generate a serial time-domain signal. The CP addition block 425 then inserts a CP into the time-domain signal. Finally, an up-counter 430 modulates (i.e., up-converts) the output of the CP adder block 425 to an RF frequency for transmission over a wireless channel. The signal may be baseband filtered before conversion to an RF frequency.

[0069] After passing through a wireless channel, the transmitted RF signals arrive at the UE 116, where inverse operations are performed at the gNB 102. A downconverter 455 downconverts the received signal to a baseband frequency, and a CP removal block 460 removes the CP to generate a serial time-domain baseband signal. A serial-to-parallel block 465 converts the time-domain baseband signal to a parallel time-domain signal. A size-N FFT block 470 then performs an FFT algorithm to generate N parallel frequency-domain signals. A parallel-to-serial block 475 converts the parallel frequency-domain signals into a sequence of modulated data symbols. A channel decoding and demodulation block 480 demodulates and then decodes the modulated symbols to recover the original input data stream.

[0070] Each of the gNBs 101-103 may implement a transmission path similar to transmitting to the user equipment 111-116 on the downlink, and may implement a reception path similar to receiving from the user equipment 111-116 on the uplink. Similarly, each of the user equipments 111-116 may implement a transmission path corresponding to an architecture for transmitting to the gNBs 101-103 on the uplink, and may implement a reception path corresponding to an architecture for receiving from the gNBs 101-103 on the downlink.

[0071] A communication system includes a downlink (DL) that transmits signals from a transmitting point, such as a base station (BS) or NodeB, to a user equipment (UE), and an uplink (UL) that transmits signals from the UE to a receiving point, such as a NodeB. A UE, generally referred to as a terminal or mobile station, may be fixed or mobile, and may be a cellular phone, a personal computing device, or an automated device. A fixed station, generally referred to as an eNodeB, may also be referred to as an access point or other equivalent technical term. In the case of an LTE system, a NodeB is often referred to as an eNodeB.

[0072] In communication systems such as LTE systems, DL signals include data signals carrying information content, control signals carrying DL control information (DCI), and reference signals (RS), also known as pilot signals. An eNodeB transmits data information via a physical DL shared channel (PDSCH). An eNodeB transmits DCI via a physical DL control channel (PDCCH) or an enhanced PDCCH (EPDCCH).

[0073] In response to a data transport block (TB) transmission from a UE, an eNodeB transmits acknowledgement information on a physical hybrid ARQ indicator channel (PHICH). The eNodeB transmits one or more types of RSs to the UE, including a UE common RS (CRS), a channel state information RS (CSI-RS), or a demodulation RS (DMRS). The CRS is transmitted over the DL system bandwidth (BW) and can be used by the UE to obtain channel estimates for demodulating data or control information or for making measurements. To reduce CRS overhead, the eNodeB may transmit a CSI-RS with lower density than the CRS in the time and / or frequency domain. The DMRS is transmitted only in the BW of the respective PDSCH or EPDCCH, and the UE can use the DMRS to demodulate data or control information in the PDSCH or EPDCCH, respectively. A transmission time interval for a DL channel is referred to as a subframe and may have a duration of, for example, 1 millisecond.

[0074] The DL signal also includes transmission of logical channels carrying system control information. The BCCH is mapped to either a transmission channel called a broadcast channel (BCH) when the DL signal carries a master information block (MIB) or a DL shared channel (DL-SCH) when the DL signal carries a system information block (SIB). Most system information is included in different SIBs transmitted using the DL-SCH. The presence of system information on the DL-SCH in a subframe is also indicated by the transmission of a corresponding PDCCH carrying a codeword together with the system information RNTI (SI-RNTI) and a scrambled cyclic redundancy check (CRC). Alternatively, scheduling information for SIB transmissions may be provided in a further previous SIB, and the scheduling information for the first SIB (SIB-1) may be provided by the MIB.

[0075] DL resource allocation is performed in subframe units and physical resource block (PRB) groups. The transmission BW includes frequency resource units called resource blocks (RB). Each RB is divided into N EPDCCH Each subframe includes subcarriers or resource elements (REs), for example, 12 REs. A unit of one RB per subframe is called a PRB. The UE allocates a total of 12 RBs for the PDSCH transmission BW.

number

number

[0076] UL signals also include data signals carrying data information, control signals carrying UL control information (UCI), and UL RSs. UL RSs include DMRSs and Sounding RSs (SRSs). A UE transmits DMRSs only in the BW of its respective PUSCH or PUCCH (Physical UL control channel). An eNodeB can demodulate data signals or UCI signals using DMRSs. A UE transmits SRSs to provide UL CSI to an eNodeB. A UE transmits data information or UCI via its respective Physical UL Shared Channel (PUSCH) or Physical UL Control Channel (PUCCH). If a UE needs to transmit data information and UCI in the same UL subframe, the UE can multiplex both onto the PUSCH. The UCI includes Hybrid Automatic Repeat request acknowledgment (HARQ-ACK) information indicating correct (ACK) or incorrect (NACK) detection of a data TB in the PDSCH or the absence of PDCCH detection (DTX), a scheduling request (SR) indicating whether the UE has data in its buffer, a rank indicator (RI), and channel state information (CSI) that enables the eNodeB to perform link adaptation for PDSCH transmission to the UE. HARQ-ACK information is also transmitted by the UE in response to detection of a PDCCH / EPDCCH, which indicates the release of a semi-permanently scheduled PDSCH.

[0077] An UL subframe contains two slots, each for transmitting data information, UCI, DMRS, or SRS.

number

number

number

[0078] FIG. 5 illustrates a transmitter block diagram 500 for a PDSCH in a subframe according to an embodiment of the present invention. The embodiment of transmitter block diagram 500 illustrated in FIG. 5 is for illustrative purposes only. One or more of the components shown in FIG. 5 may be embodied in specialized circuitry configured to perform the functions described, or one or more of the components may be embodied by one or more processors executing instructions to perform the functions described. FIG. 5 does not limit the scope of the present invention to any particular implementation of transmitter block diagram 500.

[0079] 5, information bits 510 are encoded by an encoder 520, e.g., a turbo encoder, and modulated by a modulator 530, e.g., using QPSK modulation. A serial-to-parallel (S / P) converter 540 generates M modulation symbols, which are subsequently provided to a mapper 550 to be mapped to REs selected by a transmit BW selection unit 555 for the assigned PDSCH transmit BW. Unit 560 applies an inverse fast Fourier transform (IFFT), the output of which is then serialized by a parallel-to-serial (P / S) converter 570 to generate a time-domain signal, filtering is applied by a filter 580, and the signal is transmitted (590). Further functions, such as data scrambling, CP insertion, time windowing, interleaving, etc., are well known in the art and are not shown for brevity.

[0080] FIG. 6 illustrates a receiver block diagram 600 for PDSCH in a subframe according to an embodiment of the present invention. The embodiment of diagram 600 illustrated in FIG. 6 is for illustrative purposes only. One or more of the components shown in FIG. 6 may be embodied in specialized circuitry configured to perform the functions described, or one or more of the components may be embodied by one or more processors executing instructions to perform the functions described. FIG. 6 does not limit the scope of the present invention to any particular implementation of diagram 600.

[0081] 6, a received signal 610 is filtered by a filter 620, an RE 630 for an allocated receive BW is selected by a BW selector 635, a unit 640 applies a fast Fourier transform (FFT), and the output is serialized by a parallel-to-serial converter 650. A demodulator 660 then coherently demodulates the data symbols by applying a channel estimate obtained from a DMRS or CRS (not shown), and a decoder 670, e.g., a turbo decoder, decodes the modulated data and provides estimates of information data bits 680. Further functionality such as time windowing, CP removal, discrambling, channel estimation, and de-interleaving are not shown for simplicity.

[0082] 7 illustrates a transmitter block diagram 700 for a PUSCH in a subframe according to an embodiment of the present invention. The embodiment of block diagram 700 illustrated in FIG. 7 is for illustrative purposes only. One or more of the components shown in FIG. 5 may be embodied in specialized circuitry configured to perform the functions described, or one or more of the components may be embodied by one or more processors executing instructions to perform the functions described. FIG. 7 does not limit the scope of the present invention to any particular implementation of block diagram 700.

[0083] 7, information data bits 710 are encoded by an encoder 720, e.g., a turbo encoder, and modulated by a modulator 730. A discrete Fourier transform (DFT) unit 740 applies a DFT to the modulated data bits, an RE 750 corresponding to the assigned PUSCH transmission BW is selected by a transmission BW selection unit 755, a unit 760 applies an IFFT, and after CP insertion (not shown), filtering is applied by a filter 770 and the signal is transmitted (780).

[0084] 8 illustrates a receiver block diagram 800 for a PUSCH in a subframe according to an embodiment of the present invention. The embodiment of block diagram 800 illustrated in FIG. 8 is for illustrative purposes only. One or more of the components shown in FIG. 8 may be embodied in specialized circuitry configured to perform the functions described, or one or more of the components may be embodied by one or more processors executing instructions to perform the functions described. FIG. 8 does not limit the scope of the present invention to any particular implementation of block diagram 800.

[0085] 8, a received signal 810 is filtered by a filter 820. Then, after the CP is removed (not shown), a unit 830 applies an FFT, an RE 840 corresponding to the assigned PUSCH receive BW is selected by a receive BW selector 845, a unit 850 applies an inverse DFT (IDFT), a demodulator 860 coherently demodulates the data symbols by applying a channel estimate obtained from a DMRS (not shown), and a decoder 870, e.g., a turbo decoder, decodes the demodulated data and provides estimates of information data bits 880.

[0086] Figure 9 illustrates an exemplary network configuration 900 according to an embodiment of the present invention. The embodiment of network configuration 900 illustrated in Figure 9 is for illustrative purposes only. Figure 9 does not limit the scope of the present invention to any particular implementation of configuration 900.

[0087] In order for 5G networks to support such diverse services with different quality of services (QoS), a scheme called network slicing has been identified in the 3GPP specifications.

[0088] As shown in Figure 9, an operator's network 910 includes multiple radio access networks (RANs) 920 associated with network devices such as gNBs 930a and 930b, small cell base stations (femto / pico gNBs or Wi-Fi access points) 935a and 935b. The network 910 can support a variety of services, where each service is represented as a slice.

[0089] In the example, URLL slice 940a serves UEs requiring URLL services, such as a car 945b, a truck 945c, a smartwatch 945a, and smart glasses 945d. Two mMTC slices 950a and 950b serve UEs requiring mMTC services, such as a power meter 955a and a temperature control box 955b. One eMBB slice 960a serves UEs requiring eMBB services, such as a cell phone 965a, a laptop 965b, and a tablet 965c. A device consisting of two slices is also possible.

[0090] Figure 10 illustrates an exemplary two-slice multiplexing 1000 according to an embodiment of the present invention. The embodiment of the two-slice multiplexing 1000 illustrated in Figure 10 is for illustrative purposes only. Figure 10 does not limit the scope of the present invention to any particular implementation of the two-slice multiplexing 1000.

[0091] Two exemplary instances of multiplexing two slices within a common subframe or frame are depicted in FIG. 10. In these exemplary embodiments, a slice may consist of one or two transmission instances, with one transmission instance including a control (CTRL) component (e.g., 1020a, 1060a, 1060b, 1020b, or 1060c) and a data component (e.g., 1030a, 1070a, 1070b, 1030b, or 1070c). In embodiment 1010, the two slices are multiplexed in the frequency domain, while in embodiment 1050, the two slices are multiplexed in the time domain. The two slices may be transmitted with different numerator / decoder sets.

[0092] The 3GPP specifications support up to 32 CSI-RS antenna ports, allowing a gNB to have a large number of antenna elements (e.g., 64 or 128), where multiple antenna elements are mapped onto one CSI-RS port. For next-generation cellular systems such as 5G, the maximum number of CSI-RS ports may remain the same or may increase.

[0093] FIG. 11 illustrates an example of a beam 1100 according to an embodiment of the present invention. The embodiment of beam 1100 illustrated in FIG. 11 is for illustrative purposes. One or more of the components illustrated in FIG. 11 may be embodied in specialized circuitry configured to perform the functions described, or one or more of the components may be embodied by one or more processors executing instructions to perform the functions described. FIG. 11 does not limit the scope of the present invention to any particular embodiment of beam 1100.

[0094] The 3GPP NR specification supports up to 32 CSI-RS antenna ports, allowing an eNB to have a large number of antenna elements (e.g., 64 or 128). In this case, multiple antenna elements are mapped onto one CSI-RS port. For mmWave bands, the number of antenna elements is even larger for a given form factor, but the number of CSI-RS ports—which corresponds to the number of digitally precoded ports—is likely limited by hardware constraints (such as the feasibility of installing a large number of ADCs / DACs at mmWave frequencies) as shown in FIG. 11. In this case, one CSI-RS port is mapped onto multiple antenna elements controllable by a bank of analog phase shifters 1101. One CSI-RS port can then correspond to one subarray 1105 that generates a narrow analog beam via analog beamforming. The analog beam can be configured to sweep over a wider angular range 1120 by varying the phase shifter bank across symbols or subframes. The number of subarrays (which is the same as the number of RF chains) is the same as the number of CSI-RS ports NCSI-PORT. A digital beamforming unit 1110 performs linear combining across the NCSI-PORT analog beams to further increase the precoding gain. While the analog beams are wideband (and therefore not frequency selective), digital precoding can be varied across frequency subbands or resource blocks.

[0095] To enable digital precoding, efficient CSI-RS design is a key factor. For this reason, Rel. 13 LTE supports three types of CSI reporting mechanisms corresponding to three types of CSI-RS measurement behavior: 1) "CLASS A" CSI reporting corresponding to non-precoded CSI-RS, 2) "CLASS B" reporting with K=1 CSI-RS resources corresponding to UE-specific beamformed CSI-RS, and 3) "CLASS B" reporting with K>1 CSI-RS resources corresponding to cell-specific beamformed CSI-RS. For non-precoded (NP) CSI-RS, a cell-specific one-to-one mapping between CSI-RS ports and TXRUs is utilized. Here, different CSI-RS ports have the same wide beamwidth and direction, thereby providing generally cell-wide coverage. In the case of beamformed CSI-RS, a beamforming operation, either cell-specific or UE-specific, is applied to non-zero-power (NZP) CSI-RS resources (consisting of multiple ports), where (at least at a given time / frequency) the CSI-RS ports have narrow beamwidths, thereby not providing cell-wide coverage, and at least some CSI-RS port-resource combinations (at least from the eNB's perspective) have distinct beam directions.

[0096] In scenarios where DL long-term channel statistics can be measured by the serving eNodeB via UL signals, UE-specific BF CSI-RS can be easily used. This is generally feasible when the UL-DL duplex distance is sufficiently small. However, if this condition does not hold, some UE feedback is required for the eNodeB to obtain an estimate of the DL long-term channel statistics (or any representation thereof). To facilitate such a procedure, a first BF CSI-RS is transmitted with a period T1 (ms) and a second NP CSI-RS is transmitted with a period T2 (ms), where T1≦T2. Such an approach is referred to as hybrid CSI-RS. The implementation of hybrid CSI-RS depends heavily on the definition of the CSI process and the NZP CSI-RS resource.

[0097] In the 3GPP LTE specification, UL SU-MIMO transmission is supported using a codebook-based transmission scheme. That is, the UL grant (including DCI format 4) includes a single PMI field (together with the RI) that indicates a single precoding vector or matrix (from a predefined codebook) that the UE will use for the scheduled UL transmission. Thus, when multiple PRBs are assigned to a UE, the single precoding matrix indicated by the PMI means that wideband UL precoding is utilized.

[0098] Despite its simplicity, it is clearly suboptimal because typical UL channels are frequency selective, and UEs are frequency scheduled to transmit using multiple PRBs. Yet another drawback of 3GPP LTE UL SU-MIMO is its lack of support for scenarios when accurate UL-CSI (which is essential for codebook-based transmission to work properly) is unavailable at the eNB. This situation can arise in scenarios with highly mobile UEs or bursty inter-cell interference in isolated, poorly performing cells.

[0099] Therefore, there is a need to design new components that enable more efficient support for UL MIMO for the following reasons: First, support for frequency-selective (or subband) precoding for UL MIMO is preferable whenever possible. Second, UL MIMO must provide competitive performance even when accurate UL-CSI is not available at the eNB. Third, the proposed UL MIMO solution must be able to take advantage of UL-DL reciprocity when CSI-RS is used by the UE to provide UL-CSI estimation for TDD scenarios.

[0100] In the LTE UL codebook, a precoder with antenna selection is supported to maintain a low peak-to-average power ratio (PAPR) and a small cubic metric (CM) for ranks greater than 1. Antenna selection provides performance improvements in some scenarios, especially for SC-FDMA-based UL in LTE. However, for 5G NR systems, it was agreed in 3GPP RAN1 that the UL will be primarily CP-OFDM-based, although SC-FDMA-based UL is also supported. It is unclear whether antenna selection will show any performance gains in the case of CP-OFDM-based UL. Regardless of whether antenna selection is considered, there are many alternatives for the UL codebook in 5G NR. Furthermore, the UL codebook design also depends on whether the UE can transmit UL data (PUSCH) using all or a subset of antenna ports. For example, a UE can transmit layers in the UL using at least one of fully coherent (all antenna ports), partially coherent (subset of antenna ports), or non-coherent UL transmission (single antenna port). The 5G NR UL codebook was designed with such UE coherence capabilities in mind. However, when UL power control similar to that in LTE is applied, there are some problems with UL power control (as described below). The present invention addresses several exemplary embodiments for UL power control to overcome these problems.

[0101] In 3GPP NR, UL transmission is configured to be either codebook-based or non-codebook-based via the upper layer parameter txConfig, with PUSCH-Config set to either 'codebook' or 'nonCodebook'.

[0102] According to the 3GPP NR specifications, the following is supported for codebook-based UL transmission: For codebook-based transmission, the UE determines its codebook subset upon reception of a higher layer parameter (ULCodebookSubset or codebookSubset) in PUSCH-Config, which can be configurable to "fullAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent" based on the TPMI and depending on the UE capabilities. The maximum transmission rank can be configured by a higher layer parameter (ULmaxRank or maxRank) in PUSCH-Config.

[0103] A UE that reports a UE capability of "partialAndNonCoherent" transmission cannot be expected to be configured with a UL Codebook Subset of "fullAndPartialAndNonCoherent".

[0104] A UE that reports its UE capability of "Non-Coherent" transmission cannot be expected to have its ULCodebookSubset set to "fullAndPartialAndNonCoherent" or "partialAndNonCoherent".

[0105] It cannot be expected that the UE will be configured with the upper layer parameter (ULCodebookSubset) set to "partialAndNonCoherent" when two antenna ports are configured.

[0106] In the present invention, "fullAndPartialAndNonCoherent", "partialAndNonCoherent" and "Non-Coherent" are referred to as three examples of coherence types / capabilities, where the term "coherence" refers to a subset of antenna ports in a UE that can be used to coherently transmit UL data of one layer.

[0107] According to the NR specification, for non-codebook-based UL transmission, the precoding matrix (W) is equal to the identity matrix. For codebook-based UL transmission, the precoding matrix (W) is given by w=1 for single-layer transmission on a single antenna port, and otherwise given by Tables 1 to 6.

[0108] The TPMI indices of the subsets for the three coherence types, where rank = r corresponds to (and is equivalent to) r hierarchies, are summarized in Tables 7 and 8.

[0109] The rank (or number of layers) and the corresponding precoding matrix (W) are indicated to the UE using the TRI and TPMI, respectively. In one example, this indication is concatenated via a "Precoding information and number of layers" field in the DCI, for example, using DCI format 0_1. In another example, this indication is via higher layer RRC signaling. In one example, the mapping between the "Precoding information and number of layers" field and the TRI / TPMI is NR.

[0110] [Table 1]

[0111] [Table 2]

[0112] [Table 3]

[0113] [Table 4]

[0114] [Table 5]

[0115] [Table 6]

[0116] [Table 7]

[0117] [Table 8]

[0118] [Table 9]

[0119] [Table 10]

[0120] The total power of the precoding matrix (W) for different ranks and coherence types is summarized in Tables 9 and 10. The following issues can be observed.

[0121] In one problem, for non-coherent TPMI and partially coherent TPMI, the total power increases as the rank increases, which means that TPMI selection is biased toward higher ranks. In particular, even for cell-edge UEs, rank 1 TPMI is not selected, which can seriously affect cell-edge performance.

[0122] Another problem is that for a given rank, the total power of the non-coherent TPMI is equal to or less than the total power of the partially coherent TPMI and equal to or less than the total power of the fully coherent TPMI. The reason for this trend is that the power of non-zero antenna ports is not changed across the three types of TPMI. This is beneficial in some scenarios, such as UE implementations for power saving. However, it is not always desirable.

[0123] The above problem is also addressed by TPMI or TPMI group signaling from the UE (as part of UE capability signaling), where the signaling indicates the TPMI or TPMI group for which the UE can achieve maximum power in UL transmission. The present invention proposes a number of embodiments for such TPMI or TPMI group signaling.

[0124] In embodiment 1, the UE reports whether maximum power UL transmission for codebook-based UL transmission is possible through UE capability signaling (e.g., UL max power mode 2). The UE may or may not report further details related to the UE capability signaling, i.e., any further details (e.g., TPMI or TPMI group signaling) are subject to the UE capability, i.e., it is also an optional feature for the UE.

[0125] When the UE reports further details related to UE capability signaling, the further details include B-bit signaling, where B-bit signaling S=b0...b B-1 indicates (reports) the TPMI or TPMI group that can be used to transmit UL transmissions at maximum power. Optionally, further details include a parameter P (indication) indicating one TPMI group among multiple TPMI groups. In one example, a TPMI group is defined as a group (set) of TPMIs in the UL codebook (indicating a precoding matrix). The number of supported TPMI groups (Z) can be fixed, configured, or reported by the UE.

[0126] When the UE has two antenna ports and the supported TPMI group includes only non-coherent TPMIs, the parameter P or the 2-bit signaling S indicates one of the supported TPMI groups G0, ..., G2 given in Table 11. In one example, the UE is a non-coherence capable UE. In one example, the UE is a non-coherence capable UE or a fully coherent (FC+PC+NC) capable UE. In one example, the UE is a non-coherence capable UE or a fully coherent (FC+PC+NC) capable UE or a partially coherent (PC+NC) capable UE. When the 2-bit signaling S=b0b1 (e.g., a bitmap) is used, bits b0 and b1 (or b1 and b0) indicate the TPMI groups G0, ..., G2, respectively.

number

[0127] [Table 11]

[0128] When the UE has four antenna ports and the supported TPMI group includes only non-coherent TPMIs, the parameter P indicates one of the supported TPMI groups G0,...,G3 given in Table 12. In one example, the UE is a non-coherent capable UE. In one example, the UE is a non-coherent capable UE or a fully coherent (FC+PC+NC) capable UE. In one example, the UE is a non-coherent capable UE or a fully coherent (FC+PC+NC) capable UE or a partially coherent (PC+NC) capable UE.

[0129] [Table 12]

[0130] When the UE has four antenna ports and the supported TPMI group includes only partially coherent and / or non-coherent TPMIs, the parameter P indicates one of the supported TPMI groups given by at least one of the following alternatives: In one example, the UE is a non-coherent capable UE. In one example, the UE is a non-coherent capable UE or a partially coherent (FC+NC) capable UE. In one example, the UE is a non-coherent capable UE or a fully coherent (FC+PC+NC) capable UE or a partially coherent (PC+NC) capable UE.

[0131] In one alternative, Alt 1-1, the supported TPMI groups are defined by G0,...,G6 as shown in Table 13.

[0132] [Table 13]

[0133] When the UE is a non-coherence capable UE with four antenna ports and the UE reports one of G4 to G6, the non-coherence TPMI can be inferred (derived) from the reported TPMI group by removing the partially coherent precoder (because the codebook for the non-coherence UE does not include a PC precoder). For example, the inferred (derived) non-coherence TPMI for an non-coherence UE is as shown in Table 14.

[0134] [Table 14]

[0135] In one example, an NC-capable UE with four antenna ports can report a TPMI group from a set S of TPMI groups, where set S includes all or a subset of G0 to G6 and is determined by at least one of the following examples, where G0 to G3 are as shown in Table 12 and G4 to G6 are inferred as shown in Table 14:

[0136] In one example, S={G0, G1, G2, G3}. In one example, S={G0, G1, G2, G4}. In one example, S={G0, G1, G2, G5}. In one example, S={G0, G1, G2, G6}. In one example, S={G0, G1, G2, G3, G4}. In one example, S={G0, G1, G2, G3, G5}. In one example, S={G0, G1, G2, G3, G6}. In one example, S={G0, G1, G2, G4, G5}. In one example, S={G0, G1, G2, G4, G6}. In one example, S={G0, G1, G2, G5, G6}. In one example, S={G0, G1, G2, G3, G4, G5}. In one example, S={G0, G1, G2, G3, G4, G6}. In one example, S={G0, G1, G2, G4, G5, G6}. In one example, S={G0, G1, G2, G3, G4, G5, G6}.

[0137] In one example, an NC-capable UE with four antenna ports can report a TPMI group from a set S of TPMI groups, where set S includes all or a subset of {G0 to G3, H1, H2} and is determined by at least one of the following examples, where {G0 to G3, H1, H2} are as shown in Table 15:

[0138] In one example, S={G0, G1, G2, G3}. In one example, S={G0, G1, G2, H1}. In one example, S={G0, G1, G2, H2}. In one example, S={G0, G1, G2, G3, H1}. In one example, S={G0, G1, G2, G3, H2}. In one example, S={G0, G1, G2, H1, H2}. In one example, S={G0, G1, G2, G3, H1, H2}.

[0139] [Table 15]

[0140] In one alternative, Alt 1-2, the supported TPMI groups are defined by G0,...,G15 as shown in Table 16.

[0141] [Table 16A] [Table 16B]

[0142] In one alternative, Alt 1-3, the supported TPMI groups are defined by G0,...,G14 as shown in Table 17.

[0143] [Table 17]

[0144] In one alternative, Alt 1-4, the supported TPMI groups are defined by G0,...,G12 as shown in Table 18.

[0145] [Table 18]

[0146] In one alternative, Alt 1-5, the supported TPMI groups are defined by G0,...,G12 as shown in Table 19.

[0147] [Table 19]

[0148] In one alternative, Alt 1-6, the supported TPMI groups are defined in Table 20.

[0149] [Table 20]

[0150] In one alternative, Alt 1-7, the supported TPMI groups are defined in Table 21.

[0151] [Table 21]

[0152] In one alternative, Alt 1-8, the supported TPMI groups are defined in Table 22.

[0153] [Table 22]

[0154] In one alternative, Alt 1-9, the supported TPMI groups are defined in Table 23.

[0155] [Table 23]

[0156] In one alternative, Alt 1-10, the supported TPMI groups are defined in Table 24.

[0157] [Table 24]

[0158] In one alternative, Alt 1-11, the supported TPMI groups include those defined in Table 21. Additionally, N TPMI groups include G7 through G12 shown in Table 25. In one example, N=1 and the additional TPMI is G7. In one example, N=2 and the additional TPMI is (G7, G8) or (G7, G10). In one example, N=3 and the additional TPMI is (G7, G8, G9) or (G7, G8, G10) or (G7, G10, G12). In one example, N=4 and the additional TPMI is (G7, G8, G9, G10) or (G7, G8, G10, G12) or (G7, G8, G10, G12). In one example, N=5 and the further TPMIs are (G7, G8, G9, G10, G11) or (G7, G8, G10, G11, G12) or (G7, G8, G9, G10, G12).

[0159] [Table 25]

[0160] In one alternative, Alt 1-12, the supported TPMI groups include those defined in Table 22. Additionally, N TPMI groups include G7 through G12 shown in Table 25. In one example, N=1 and the additional TPMI is G7. In one example, N=2 and the additional TPMI is (G7, G8) or (G7, G10). In one example, N=3 and the additional TPMI is (G7, G8, G9) or (G7, G8, G10) or (G7, G10, G12). In one example, N=4 and the additional TPMI is (G7, G8, G9, G10) or (G7, G8, G10, G12) or (G7, G8, G10, G12). In one example, N=5 and the further TPMIs are (G7, G8, G9, G10, G11) or (G7, G8, G10, G11, G12) or (G7, G8, G9, G10, G12).

[0161] In one alternative, Alt 1-13, the supported TPMI groups include those defined in Table 23. Additionally, N TPMI groups include G7 through G12 shown in Table 25. In one example, N=1 and the additional TPMI is G7. In one example, N=2 and the additional TPMI is (G7, G8) or (G7, G10). In one example, N=3 and the additional TPMI is (G7, G8, G9) or (G7, G8, G10) or (G7, G10, G12). In one example, N=4 and the additional TPMI is (G7, G8, G9, G10) or (G7, G8, G10, G12) or (G7, G8, G10, G12). In one example, N=5 and the further TPMIs are (G7, G8, G9, G10, G11) or (G7, G8, G10, G11, G12) or (G7, G8, G9, G10, G12).

[0162] In one alternative, Alt 1-14, the supported TPMI groups include those defined in Table 24. Additionally, N TPMI groups include G7 through G12 shown in Table 25. In one example, N=1 and the additional TPMI is G7. In one example, N=2 and the additional TPMI is (G7, G8) or (G7, G10). In one example, N=3 and the additional TPMI is (G7, G8, G9) or (G7, G8, G10) or (G7, G10, G12). In one example, N=4 and the additional TPMI is (G7, G8, G9, G10) or (G7, G8, G10, G12) or (G7, G8, G10, G12). In one example, N=5 and the further TPMIs are (G7, G8, G9, G10, G11) or (G7, G8, G10, G11, G12) or (G7, G8, G9, G10, G12).

[0163] In embodiment 2, a UE with two antenna ports can report only a single TPMI group from the supported TPMI groups and non-coherent TPMI groups for the two antenna ports.

[0164] A UE with four antenna ports and a non-coherent antenna can only report one of the following: (A) A single TPMI group from a supported TPMI group and a non-coherent TPMI group for four antenna ports (B) a single TPMI group from a supported TPMI group and a non-coherent TPMI group for two antenna ports; -(A) and (B) -(A) or (B) -(A), (B) or both (A) and (B)

[0165] Support for one of the above may be governed by (optional) UE capabilities.

[0166] A UE with four antenna ports and a partially coherent antenna can only report: (A) A single TPMI group from a supported TPMI group and a non-coherent TPMI group for four antenna ports (B) a single TPMI group from a supported TPMI group and a non-coherent TPMI group for two antenna ports; (C) A single TPMI group from a supported TPMI group and a non-coherent / partially coherent TPMI group for four antenna ports -(A) and (B) -(A) or (B) -(A), (B) or both (A) and (B) -(A) and (C) -(A) or (C) -(A), (C), or both (A) and (C) -(C) and (B) -(C) or (B) -(C), (B) or both (C) and (B) -(A), (B) and (C)

[0167] Support for one of the above may be governed by (optional) UE capabilities.

[0168] In embodiment 3, a UE with two antenna ports can report only a single TPMI group from the supported TPMI groups and non-coherent TPMI groups for the two antenna ports. An example of supported TPMI groups G0-G2 is shown in Table 11. In one example, the reporting is via a parameter that can take three values, one for each of G0-G2, or via a two-bit indication. In one example, the reporting is independent of the coherence capability reported by the UE. For example, the reporting is the same for both non-coherent and fully coherent UEs.

[0169] A UE with four antenna ports and non-coherent antennas (ie, a NC UE with four antenna ports) can only report one of the following: (A) A single TPMI group from a supported TPMI group and a non-coherent TPMI group for four antenna ports (B) a single TPMI group from a supported TPMI group and a non-coherent TPMI group for two antenna ports; -(A) and (B) -(A) or (B) -(A), (B) or both (A) and (B)

[0170] Support for one of the above may be governed by (optional) UE capabilities.

[0171] In one example, a UE with four antenna ports and a non-coherent antenna can report TPMI groups by (A), (B), or both (A) and (B), where an example of supported four antenna ports and non-coherent TPMI groups G0 to G3 is shown in Table 12, and an example of supported two antenna ports and non-coherent TPMI groups G0 to G2 is shown in Table 11. The payload (number of bits) for the report is as follows: If the UE reports (B), the report is via a parameter P1 which can take three values, one for each of G0 to G2, or via a 2-bit indication. If the UE reports (A), the report is via a parameter P2 which can take four values, one for each of G0 to G3, or via a 2-bit indication. If the UE reports (A) and (B), the report is via a 4-bit indication or via a parameter P=(P1,P2), where P1 can take three values, one for each of G0 to G2 (see Table 11), and P2 can take four values, one for each of G0 to G3 (see Table 12).

[0172] One of the above reports (and payload) may be governed by the (optional) UE capabilities. For example, if a UE supports multiple SRS resources in an SRS set with usage set to "Codebook" so that the number of SRS ports varies across the SRS resources, and the UE can support SRS resources with up to four SRS ports, the UE may report both (A) and (B) via a 4-bit indication or via parameter P=(P1,P2) as described above.

[0173] Otherwise, when the UE can only support the same number of SRS ports (across multiple SRS resources), the UE can report (A) or (B) via parameters P1 or P2 or via a 2-bit indication, as described above.

[0174] In one example, a UE with four antenna ports and a non-coherent antenna can report two TPMI groups by both (A) and (B), i.e., the UE needs to report a TPMI group from the two-port non-coherent TPMI group and a TPMI group from the four-port non-coherent TPMI group, where an example of supported four antenna ports and non-coherent TPMI groups G0 to G3 is shown in Table 12, and an example of supported two antenna ports and non-coherent TPMI groups G0 to G2 is shown in Table 11. The payload (number of bits) for the report is as follows: The reporting is via a 4-bit indication or via a parameter P=(P1,P2), where P1 can take three values, one for each of G0 to G2 (see Table 11), and P2 can take four values, one for each of G0 to G3 (see Table 12).

[0175] A UE with four antenna ports and a partially coherent antenna (ie, a PC UE with four antenna ports) can only report one of the following: (A) A single TPMI group from a supported TPMI group and a non-coherent TPMI group for four antenna ports (B) a single TPMI group from a supported TPMI group and a non-coherent TPMI group for two antenna ports; (C) A single TPMI group from a supported TPMI group and a non-coherent / partially coherent TPMI group for four antenna ports -(A) and (B) -(A) or (B) -(A), (B) or both (A) and (B) -(A) and (C) -(A) or (C) -(A), (C), or both (A) and (C) -(C) and (B) -(C) or (B) -(C), (B) or both (C) and (B) -(A), (B) and (C)

[0176] Support for one of the above may be governed by (optional) UE capabilities.

[0177] In one example, a UE with four antenna ports and a partially coherent antenna can report TPMI groups according to (C), (B), or both (C) and (B), where an example of supported four antenna ports and non-coherent / partially coherent TPMI groups G0 to G6 is shown in Table 13, and an example of supported two antenna ports and non-coherent TPMI groups G0 to G2 is shown in Table 11. The payload (number of bits) for the report is as follows: If the UE reports (B), the report is via a parameter P1 which can take three values, one for each of G0 to G2, or via a 2-bit indication. If the UE reports (C), the report is via parameter P2, which can take seven values, one for each of G0 to G6, or via a 3-bit (or 4-bit) indication. If the UE reports (C) and (B), the report is via a 5-bit indication or via a parameter P=(P1,P2), where P1 can take three values, one for each of G0 to G2 (see Table 11), and P2 can take seven values, one for each of G0 to G3 (see Table 13).

[0178] One of the above reports (and payload) may be governed by the (optional) UE capabilities. For example, if a UE supports multiple SRS resources in an SRS set with usage set to "Codebook" so that the number of SRS ports varies across the SRS resources, and the UE can support SRS resources with up to four SRS ports, the UE may report both (C) and (B) via a 5-bit indication or via parameter P=(P1,P2) as described above.

[0179] Otherwise, when the UE can only support the same number of SRS ports (across multiple SRS resources), the UE can report (A) or (B) via parameters P1 or P2, or via 2-bit (or 3-bit) as described above.

[0180] In one example, a UE having four antenna ports and a partially coherent antenna can report three TPMI groups according to (A), (B), and (C), i.e., the UE needs to report a TPMI group from a two-port non-coherent TPMI group, a TPMI group from a four-port non-coherent TPMI group, and a TPMI group from a four-port partially coherent TPMI group, where an example of supported four antenna ports and non-coherent TPMI groups G0 to G3 is shown in Table 12, an example of supported two antenna ports and non-coherent TPMI groups G0 to G2 is shown in Table 11, and an example of supported four antenna ports and partially coherent TPMI groups G0 to G6 is shown in Table 13. The payload (number of bits) for the report is as follows: The reporting is via a 7-bit indication or via the parameter P=(P1, P2, P3), where P1 can take three values, one for each of G0 to G2 (see Table 11), P2 can take four values, one for each of G0 to G3 (see Table 12), and P3 can take seven values, one for each of G0 to G6 (see Table 13).

[0181] In one example, a UE having four antenna ports and a partially coherent antenna can report three TPMI groups according to (A), (B), and (C), i.e., the UE needs to report a TPMI group from a two-port non-coherent TPMI group, a TPMI group from a four-port non-coherent TPMI group, and a TPMI group from a four-port partially coherent TPMI group, where an example of supported four antenna ports and non-coherent TPMI groups G0 to G3 is shown in Table 12, an example of supported two antenna ports and non-coherent TPMI groups G0 to G2 is shown in Table 11, and an example of supported four antenna ports and partially coherent TPMI groups G4 to G6 is shown in Table 13. The payload (number of bits) for the report is as follows: The reporting is via a 6-bit indication or via the parameter P=(P1, P2, P3), where P1 can take three values, one for each of G0 to G2 (see Table 11), P2 can take four values, one for each of G0 to G3 (see Table 12), and P3 can take three values, one for each of G4 to G6 (see Table 13).

[0182] In one example, a UE with four antenna ports and a partially coherent antenna can report TPMI groups according to (C), (B), or both (C) and (B), where an example of supported four antenna ports and non-coherent / partially coherent TPMI groups G0 to G6 is shown in Table 13, and an example of supported two antenna ports and non-coherent TPMI groups G0 to G2 is shown in Table 11. The payload (number of bits) for the report is as follows: If the UE reports (B), the report is via a parameter P1 which can take three values, one for each of G0 to G2, or via a 2-bit indication. If the UE reports (C), the report is via parameter P2, which can take seven values, one for each of G0 to G6, or via a 3-bit (or 4-bit) indication. - If the UE reports (C) and (B), the report is via a 4-bit indication such that P=P2 (above) or P=g1, g2, or via a parameter P, where g1, g2 can take values from set S of TPMI groups g1, g2, and g1 belongs to Y and g2 belongs to Z, where, for notation, Y = 4-port non-coherent TPMI groups G0 to G3 in Table 12, and Z = 4-port non-coherent / partially coherent TPMI groups G0 to G6 in Table 13. Therefore, the total number of states for TPMI group reporting is = 7 + x, where x is the size of set S.

[0183] The set S is according to at least one of the following examples: -S={G1,G4),(G2,G4)}, where G1, G2 and G4 are as in Table 13. -S={(G0,G4),(G0,G5),(G0,G6),(G1,G4),(G1,G5),(G1,G6),(G2,G4),(G2,G6)}, where G0 to G6 are as shown in Table 13. -S is a subset of {(G0,G4),(G0,G5),(G0,G6),(G1,G4),(G1,G5),(G1,G6),(G2,G4),(G2,G6)}, where G0 to G6 are as shown in Table 13.

[0184] In one example, for a 4-port fully coherent UE, the reporting is the same as for a 4-port partially coherent UE.

[0185] Throughout the present invention, the union of TPMI group = {Gi, Gj} is interchangeably substituted with the pair (Gi, Gj), i.e., TPMI group = pair (Gi, Gj), which is applicable to all embodiments of the present invention.

[0186] In embodiment 4, the UE reports a single TPMI group or multiple TPMI groups according to at least one of the following subembodiments.

[0187] In subembodiment 4.1, for a UE with four antenna ports, the UE must report X, where: X=one or more of the TPMI groups g1, g2 and g3, i.e. X=g1 or g2 or g3 or (g1,g2) or (g2,g3) or (g1,g3) or (g1,g2,g3), where: --g1 is a TPMI group from the set of TPMI groups (S1) for two antenna ports, --g2 is the TPMI group from the first set of TPMI groups (S2) for the four antenna ports, --g3 is a TPMI group from the second set of TPMI groups (S3) for the four antenna ports.

[0188] In one example, the report is for UEs only with partially coherent antennas. In another example, the report is for UEs with either partially coherent or fully coherent antennas. In another example, the report can be a UE antenna coherence capability report.

[0189] In subembodiment 4.2, for a UE with four antenna ports, the UE must report multiple TPMI groups (X, Y), where: X=g1 is a TPMI group from the set of TPMI groups (S1) for two antenna ports, Y=one or both of the TPMI groups g2 and g3, i.e., Y=g2 or g3 or (g2, g3), where: --g2 is the TPMI group from the first set of TPMI groups (S2) for the four antenna ports, --g3 is a TPMI group from the second set of TPMI groups (S3) for the four antenna ports.

[0190] In one example, the report is for UEs only with partially coherent antennas. In another example, the report is for UEs with either partially coherent or fully coherent antennas. In another example, the report can be a UE antenna coherence capability report.

[0191] In subembodiment 4.3, for a UE with four antenna ports, the UE must report multiple TPMI groups (X, Y, Z), where: X=g1 is a TPMI group from the set of TPMI groups (S1) for two antenna ports, Y=g2 is a TPMI group from the first set of TPMI groups (S2) for the four antenna ports; - Z=g3 is a TPMI group from the second set of TPMI groups (S3) for four antenna ports.

[0192] In one example, the report is for UEs only with partially coherent antennas. In another example, the report is for UEs with either partially coherent or fully coherent antennas. In another example, the report can be a UE antenna coherence capability report.

[0193] In subembodiment 4.4, for a UE with four antenna ports and a non-coherent antenna, the UE must report X, where: X=one or more of the TPMI groups g1, g2 and g3, i.e. X=g1 or g2 or g3 or (g1,g2) or (g2,g3) or (g1,g3) or (g1,g2,g3), where: --g1 is a TPMI group from the set of TPMI groups (S1) for two antenna ports, --g2 is the TPMI group from the first set of TPMI groups (S2) for the four antenna ports, --g3 is a TPMI group from the second set of TPMI groups (S3) for the four antenna ports.

[0194] In subembodiment 4.5, for a UE with four antenna ports and non-coherent antennas, the UE must report multiple TPMI groups (X, Y), where: X=g1 is a TPMI group from the set of TPMI groups (S1) for two antenna ports, Y=one or both of the TPMI groups g2 and g3, i.e., Y=g2 or g3 or (g2, g3), where: --g2 is the TPMI group from the first set of TPMI groups (S2) for the four antenna ports, --g3 is a TPMI group from the second set of TPMI groups (S3) for the four antenna ports.

[0195] In subembodiment 4.6, for a UE with four antenna ports and non-coherent antennas, the UE must report multiple TPMI groups (X, Y, Z), where: X=g1 is a TPMI group from the set of TPMI groups (S1) for two antenna ports, Y=g2 is a TPMI group from the first set of TPMI groups (S2) for the four antenna ports; - Z=g3 is a TPMI group from the second set of TPMI groups (S3) for four antenna ports.

[0196] In subembodiment 4.7, for a UE with two antenna ports, the UE shall report a single TPMI group (X), where: - X=g1 is a TPMI group from the set of TPMI groups (S1) for two antenna ports.

[0197] In one example, the report is for UEs with only non-coherent antennas. In another example, the report is for UEs with either non-coherent or fully coherent antennas. In another example, the report can be a UE antenna coherence capability report.

[0198] In one example, the set of TPMI groups (S1) in subembodiments 4-1 to 4-7 corresponds to {G0, G1, G2} shown in Table 11, and the TPMI group g1 can be indicated via a 2-bit bitmap (associated with TPMI=0,1). In this case, a bitmap value=00 can be used to indicate "NULL", indicating that g1 is not reported.

[0199] In one example, the first TPMI group sets (S2 and S3) in subembodiments 4-4 to 4-6 correspond to {G0, G1, G2} and {G3, G4, G5} as shown in Table 26, where the TPMI groups are the same as those in Table 15. TPMI group g2 may be indicated via a 2-bit indication. In this case, a value (e.g., 0) may be used to indicate "NULL," indicating that g2 has not been reported. Similarly, TPMI group g3 may be indicated via a 2-bit indication. In this case, a value (e.g., 0) may be used to indicate "NULL," indicating that g3 has not been reported. Alternatively, TPMI groups g2 and g3 may be jointly indicated via a 4-bit indication. In this case, a value (e.g., 0) may be used to indicate "NULL," indicating that g2 and g3 have not been reported.

[0200] In one example, the first set of TPMI groups (S2 and S3) in subembodiments 4-4 to 4-6 correspond to {G0, G1, G2, G3} and {G4, G5} as shown in Table 26. In one example, the first set of TPMI groups (S2 and S3) in subembodiments 4-4 to 4-6 correspond to {G0, G1, G2} and {G3, G4, G5, G6} as shown in Table 27.

[0201] [Table 26]

[0202] In one example, the first TPMI group sets (S2 and S3) in subembodiments 4-1 to 4-3 correspond to {G0, G1, G2} and {G3, G4, G5, G6} as shown in Table 27, where the TPMI groups are the same as those in Table 13. TPMI group g2 may be indicated via a 2-bit indication. In this case, a value (e.g., 0) may be used to indicate "NULL," indicating that g2 has not been reported. Similarly, TPMI group g3 may be indicated via a 2-bit indication. In this case, a value (e.g., 0) may be used to indicate "NULL," indicating that g3 has not been reported. Alternatively, TPMI groups g2 and g3 may be jointly indicated via a 4-bit indication. In this case, a value (e.g., 0) may be used to indicate "NULL," indicating that g2 and g3 have not been reported.

[0203] In one example, the first set of TPMI groups (S2 and S3) in subembodiments 4-1 to 4-3 corresponds to {G0, G1, G2} and {G4, G5, G6} as shown in Table 26. In one example, the first set of TPMI groups (S2 and S3) in subembodiments 4-1 to 4-3 corresponds to {G0, G1, G2, G3} and {G4, G5, G6} as shown in Table 27.

[0204] [Table 27]

[0205] Any of the above variants may be used independently or in combination with at least one other variant.

[0206] Figure 12 illustrates a flowchart of a method 1200 of operating a user equipment (UE) that may be performed by a UE, such as UE 116, in accordance with an embodiment of the present invention. The method embodiment 1200 illustrated in Figure 12 is for illustrative purposes only. Figure 12 does not limit the scope of the present invention to any particular implementation.

[0207] 12, method 1200 begins at step 1202. In step 1202, a UE (e.g., 111-116 as shown in FIG. 1) transmits UE capability information including a maximum power transmission capability, where the maximum power transmission capability includes information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power.

[0208] In step 1204, the UE receives configuration information for physical uplink shared channel (PUSCH) transmission.

[0209] In step 1206, the UE receives a TPMI indicating a precoding matrix and number of layers for PUSCH transmission.

[0210] In step 1208, the UE sends a PUSCH transmission based on the configuration information.

[0211] In step 1210, the UE determines a power level for PUSCH transmission, and if the TPMI is included in one of a plurality of TPMI groups that conveys maximum power, the power level corresponds to maximum power.

[0212] In step 1212, the UE transmits a PUSCH transmission at the determined power level.

[0213] In one embodiment, the UE capability information further includes a coherence capability of an antenna port at the UE, where the coherence capability is one of non-coherent, partially coherent, or fully coherent.

[0214] In one embodiment, when the UE has four antenna ports and the coherence capability corresponds to non-coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, and a TPMI group relating to two antenna ports and including a non-coherent TPMI.

[0215] In one embodiment, the TPMI group that involves four antenna ports and includes a non-coherent TPMI is one of TPMI groups G0, . . . , G3 given by:

[0216] [Table 28]

[0217] A TPMI group that involves two antenna ports and includes a non-coherent TPMI is indicated via a 2-bit bitmap b0b1, where bits b0 and b1 respectively represent the TPMI

number

[0218] In one embodiment, when the UE has four antenna ports and the coherence capability corresponds to partial coherence, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0219] In one embodiment, the TPMI group that involves four antenna ports and includes a non-coherent TPMI is one of TPMI groups G0, . . . , G3 given by:

[0220] [Table 29]

[0221] A TPMI group that involves two antenna ports and includes a non-coherent TPMI is indicated via a 2-bit bitmap b0b1, where bits b0 and b1 respectively represent the TPMI

number

[0222] [Table 30]

[0223] In one embodiment, when the UE has four antenna ports and the coherence capability corresponds to fully coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0224] In one embodiment, the TPMI group that involves four antenna ports and includes a non-coherent TPMI is one of TPMI groups G0, . . . , G3 given by:

[0225] [Table 31]

[0226] A TPMI group that involves two antenna ports and includes a non-coherent TPMI is indicated via a 2-bit bitmap b0b1, where bits b0 and b1 respectively represent the TPMI

number

[0227] [Table 32]

[0228] Figure 13 illustrates a flowchart of another method 1300 that may be performed by a base station (BS), such as BS 102, in accordance with an embodiment of the present invention. The method embodiment 1300 illustrated in Figure 13 is for illustrative purposes only. Figure 13 does not limit the scope of the present invention to any particular implementation.

[0229] 13, method 1300 begins at step 1302. In step 1302, a BS (e.g., 101-103 as shown in FIG. 1) receives user equipment (UE) capability information including a maximum power transmission capability, where the maximum power transmission capability includes information (I) indicating a plurality of transmit precoding matrix indicator (TPMI) groups that convey maximum power.

[0230] In step 1304, the BS generates configuration information for physical uplink shared channel (PUSCH) transmission.

[0231] In step 1306, the BS generates a TPMI indicating the number of layers and precoding matrices for PUSCH transmission.

[0232] In step 1308, the BS transmits configuration information for PUSCH transmission.

[0233] In step 1310, the BS transmits a TPMI.

[0234] In step 1312, the BS receives a PUSCH transmission transmitted at a power level that corresponds to maximum power if the TPMI is included in one of a plurality of TPMI groups that conveys maximum power.

[0235] In one embodiment, the UE capability information further includes a coherence capability of an antenna port at the UE, where the coherence capability is one of non-coherent, partially coherent, or fully coherent.

[0236] In one embodiment, when the UE has four antenna ports and the coherence capability corresponds to non-coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, and a TPMI group relating to two antenna ports and including a non-coherent TPMI.

[0237] In one embodiment, the TPMI group that involves four antenna ports and includes a non-coherent TPMI is one of TPMI groups G0, . . . , G3 given by:

[0238] [Table 33]

[0239] A TPMI group that involves two antenna ports and includes a non-coherent TPMI is indicated via a 2-bit bitmap b0b1, where bits b0 and b1 respectively represent the TPMI

number

[0240] In one embodiment, when the UE has four antenna ports and the coherence capability corresponds to partial coherence, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0241] In one embodiment, the TPMI group that involves four antenna ports and includes a non-coherent TPMI is one of TPMI groups G0, . . . , G3 given by:

[0242] [Table 34]

[0243] A TPMI group that involves two antenna ports and includes a non-coherent TPMI is indicated via a 2-bit bitmap b0b1, where bits b0 and b1 respectively represent the TPMI

number

[0244] [Table 35]

[0245] In one embodiment, when the UE has four antenna ports and the coherence capability corresponds to fully coherent, the information (I) indicates one or more of a TPMI group relating to four antenna ports and including a non-coherent TPMI, a TPMI group relating to two antenna ports and including a non-coherent TPMI, and a TPMI group relating to four antenna ports and including a partially coherent TPMI.

[0246] In one embodiment, the TPMI group that involves four antenna ports and includes a non-coherent TPMI is one of TPMI groups G0, . . . , G3 given by:

[0247] [Table 36]

[0248] A TPMI group that involves two antenna ports and includes a non-coherent TPMI is indicated via a 2-bit bitmap b0b1, where bits b0 and b1 respectively represent the TPMI

number

[0249] [Table 37]

[0250] The above flowcharts illustrate exemplary methods that can be implemented in accordance with the principles of the present invention, and various modifications may be made to the methods illustrated in the flowcharts of the present invention. For example, although illustrated as a series of steps, the various steps in each figure may overlap, occur in parallel, occur in a different order, or occur multiple times. In other examples, steps may be omitted or replaced by other steps.

[0251] FIG. 14 illustrates a base station according to an embodiment of the present invention.

[0252] Referring to Figure 14, base station 1400 also includes a processor 1410, a transceiver unit 1420, and a memory 1430. However, not all of the illustrated components are required. Base station 1400 may be implemented with more or fewer components than those illustrated in Figure 14. Furthermore, processor 1410, transceiver unit 1420, and memory 1430 may be implemented as a single chip in other embodiments.

[0253] The base station 1400 may correspond to the gNB described above. For example, the base station 1400 may correspond to the gNB 102 shown in FIG. 2.

[0254] The aforementioned components are described in detail below.

[0255] The processor 1410 includes one or more processors or other processing devices that control the functions, processes, and / or methods described herein. The operations of the base station 1400 are also embodied by the processor 1410.

[0256] The transceiver 1420 includes an RF transmitter that upconverts and amplifies signals to be transmitted and an RF receiver that downconverts the frequency of received signals, although in other embodiments, the transceiver 1420 may be implemented with more or fewer components than those shown.

[0257] The transceiver 1420 is coupled to the processor 1410 and / or can transmit and / or receive signals. The signals may include control information and data. The transceiver 1420 can also receive signals via a wireless channel and output the signals to the processor 1410. The transceiver 1420 can transmit the signals output from the processor 1410 via a wireless channel.

[0258] The memory 1430 may store control information or data included in signals acquired by the base station 1400. The memory 1430 may be coupled to the processor 1410 and may store at least one instruction, protocol, or parameter for proposed functions, processes, and / or methods. The memory 1430 may include a read-only memory (ROM), a random access memory (RAM), a hard disk, a CD-ROM, a DVD, and / or other storage devices.

[0259] FIG. 15 illustrates a user equipment (UE) according to an embodiment of the present invention.

[0260] Referring to Figure 15, UE 1500 also includes a processor 1510, a transceiver 1520, and a memory 1530. However, not all of the illustrated components are required. UE 1500 may be implemented with more or fewer components than those shown in Figure 15. Furthermore, processor 1510, transceiver 1520, and memory 1530 may be implemented as a single chip in other embodiments.

[0261] UE 1500 may correspond to the UEs described above. For example, UE 1500 may correspond to UE 116 shown in FIG.

[0262] The aforementioned components are described in detail below.

[0263] The processor 1510 may include one or more processors or other processing devices that control the functions, processes, and / or methods described herein. The operations of the UE 1500 may also be implemented by the processor 1510.

[0264] The transceiver 1520 includes an RF transmitter that upconverts and amplifies signals to be transmitted and an RF receiver that downconverts the frequency of received signals, although in other embodiments the transceiver 1520 may be implemented with more or fewer components than those shown.

[0265] The transceiver 1520 is coupled to the processor 1510 and / or can transmit and / or receive signals. The signals may include control information and data. The transceiver 1520 can also receive signals via a wireless channel and output the signals to the processor 1510. The transceiver 1520 can transmit the signals output from the processor 1510 via a wireless channel.

[0266] The memory 1530 may store control information or data included in signals acquired by the UE 1500. The memory 1530 may be coupled to the processor 1510 and may store at least one instruction, protocol, or parameter for proposed functions, processes, and / or methods. The memory 1530 may include a read-only memory (ROM), a random access memory (RAM), a hard disk, a CD-ROM, a DVD, and / or other storage devices.

[0267] Although the present invention has been described by exemplary embodiments, various changes and modifications may be suggested to those of ordinary skill in the art. The present invention is intended to include such changes and modifications that fall within the scope of the appended claims. Nothing in this application should be construed as implying that any particular element, step, or function is an essential element that must be included in the scope of the claims. The scope of the subject matter sought to be patented is defined solely by the claims. [Explanation of symbols]

[0268] 100 Wireless Networks 101, 102, 103 gNodeB (gNB) 111, 112, 113, 114, 115, 116 User Equipment (UE) 120,125 Coverage Range 130 Network 205a, 205b, 205n antennas 210a, 210b, 210n Radio frequency (RF) transceiver 215 Transmit (TX) Processing Circuit 220 Receive (RX) Processing Circuit 225 Control Unit / Processor 230 memory 235 Backhaul / Network Interface (IF) 305 Antenna 310 RF Transmitter / Receiver 315 TX processing circuit 320 microphone 325 RX processing circuit 330 Speaker 340 processor 345 Input / Output (I / O) IF 350 Touchscreen 355 Display 360 memory 361 Operating Systems 362 Applications 400 Transmission path circuit 405 Channel Coding and Modulation Block 410 Series vs. Parallel Blocks 415 size N inverse fast Fourier transform (IFFT) blocks 420 Parallel vs. Serial Blocks 425 CP (cyclic prefix) additional block 430 Up Converter (UC) 450 Receive path circuit 455 Down Converter (DC) 460 CP removal block 465 Series vs. Parallel Blocks 470 size N Fast Fourier Transform (FFT) blocks 475 Parallel vs. Series Blocks 480 Channel Decoding and Demodulation Block 500 Transmitter 510 information bits 520 Encoder 530 Modulator 540 Series to Parallel Converter 550 Resource Element (RE) Mapper 555 Transmission Bandwidth (BW) Selection Unit 560 IFFT unit 570 Parallel to Serial Converter 580 Filter 590 Transmitted Signal 600 receiver 610 Received Signal 620 Filter 630 RE Demapper 635 Receive BW Selection Unit 640 FFT units 650 Parallel to Serial Converter 660 Demodulator 670 decoder 680 information data bits 700 Transmitter 710 information data bits 720 Encoder 730 Modulator 740 Discrete Fourier Transform (DFT) Unit 750 RE Mapper 755 Transmit BW Selection Unit 760 IFFT unit 770 Filter 780 Transmitted Signal 800 receiver 810 Received Signal 820 Filter 830 FFT unit 840 RE Demapper 845 Receive BW Selection Unit 850 Inverse Discrete Fourier Transform (IDFT) Unit 860 Demodulator 870 decoder 880 information data bits 900 Network Configuration 910 Operator Network 920 Radio Access Network (RAN) 930a,930b gNB 935a, 935b Small cell base station 940a URLL slice 945a, 945b, 945c, 945d UE requesting URLL service 950a, 950b mMTC slices 955a, 955b UE requesting mMTC service 960a eMBB slice 965a, 965b, 965c UE requesting eMBB service 1400 base stations 1410 processor 1420 Transmitter / Receiver 1430 memory 1500 UE 1510 processor 1520 Transmitter / Receiver 1530 memory

Claims

1. In a user equipment (UE) in a wireless communication system, a transmitter / receiver; Memory and at least one processor coupled to the transceiver and the memory; The at least one processor transmitting UE capability information to a base station indicating at least one transmit precoding matrix indicator (TPMI) group for which the UE is capable of transmitting maximum power; The UE capability information If the UE is a dual-port UE, the TPMI group information related to dual ports is included; If the UE is a 4-port non-coherent UE, the TPMI group information includes one or more of 4-port non-coherent TPMI group information and TPMI group information related to the 2 ports; If the UE is a 4-port partially coherent UE, the TPMI group information includes one or more of 4-port partially coherent TPMI group information, the 4-port non-coherent TPMI group information, and TPMI group information related to the 2 ports; If the UE is a 4-port fully coherent UE, the UE capability information is configured the same as when the UE is a 4-port partially coherent UE; If a TPMI for a physical uplink shared channel (PUSCH) transmission is included in the at least one TPMI group indicated by the UE capability information, identifying a power level for the PUSCH transmission corresponding to the maximum power; A user equipment (UE) configured to perform the PUSCH transmission at the identified power level.

2. In a base station of a wireless communication system, a transmitter / receiver; Memory and at least one processor coupled to the transceiver and the memory; The at least one processor receiving, from a user equipment (UE), UE capability information indicating at least one transmit precoding matrix indicator (TPMI) group for which the UE is capable of transmitting maximum power; The UE capability information If the UE is a dual-port UE, the TPMI group information related to dual ports is included; If the UE is a 4-port non-coherent UE, the TPMI group information includes one or more of 4-port non-coherent TPMI group information and TPMI group information related to the 2 ports; If the UE is a 4-port partially coherent UE, the TPMI group information includes one or more of 4-port partially coherent TPMI group information, the 4-port non-coherent TPMI group information, and TPMI group information related to the 2 ports; If the UE is a 4-port fully coherent UE, the UE capability information is configured the same as when the UE is a 4-port partially coherent UE; configured to receive a physical uplink shared channel (PUSCH) transmission from the UE having a power level; A base station, wherein if the TPMI for the PUSCH transmission is included in the at least one TPMI group indicated by the UE capability information, the power level corresponds to the maximum power.

3. A method performed by a user equipment (UE) in a wireless communication system, comprising: transmitting, to a base station, UE capability information indicating at least one transmit precoding matrix indicator (TPMI) group for which the UE is capable of transmitting maximum power; The UE capability information If the UE is a dual-port UE, the TPMI group information related to dual ports is included; If the UE is a 4-port non-coherent UE, the TPMI group information includes one or more of 4-port non-coherent TPMI group information and TPMI group information related to the 2 ports; If the UE is a 4-port partially coherent UE, the TPMI group information includes one or more of 4-port partially coherent TPMI group information, the 4-port non-coherent TPMI group information, and TPMI group information related to the 2 ports; If the UE is a 4-port fully coherent UE, the UE capability information is configured the same as when the UE is a 4-port partially coherent UE; identifying a power level for transmitting a physical uplink shared channel (PUSCH) corresponding to the maximum power when a TPMI for the PUSCH transmission is included in the at least one TPMI group indicated by the UE capability information; and performing the PUSCH transmission at the identified power level.

4. A method performed by a base station in a wireless communication system, comprising: receiving, from a user equipment (UE), UE capability information indicating at least one transmit precoding matrix indicator (TPMI) group for which the UE is capable of transmitting maximum power; The UE capability information If the UE is a dual-port UE, the TPMI group information related to dual ports is included; If the UE is a 4-port non-coherent UE, the TPMI group information includes one or more of 4-port non-coherent TPMI group information and TPMI group information related to the 2 ports; If the UE is a 4-port partially coherent UE, the TPMI group information includes one or more of 4-port partially coherent TPMI group information, the 4-port non-coherent TPMI group information, and TPMI group information related to the 2 ports; If the UE is a 4-port fully coherent UE, the UE capability information is configured the same as when the UE is a 4-port partially coherent UE; receiving a physical uplink shared channel (PUSCH) transmission from the UE having a power level; A method, wherein if the TPMI for the PUSCH transmission is included in the at least one TPMI group indicated by the UE capability information, the power level corresponds to the maximum power.

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