Sounding reference signal power control for multiple-input multiple-output wireless system

Abstract

To provide a method for performing sounding reference signal power control for a multiple-input multiple-output wireless system.SOLUTION: The method includes: selecting, by a user device independently for each of sounding reference signal resources, an uplink data channel power control parameter set for an uplink data channel beam pair to be used to adjust a sounding reference signal transmission power for a sounding reference signal beam pair; adjusting, by the user device for each sounding reference signal resource on the basis of a selected uplink data channel power control parameter set, a sounding reference signal transmission power for a sounding reference signal, and transmitting, by the user device, each of power-adjusted sounding reference signals via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] This specification relates to communications.

Background Art

[0002] A communication system is a facility that enables communication between two or more nodes or devices, such as a fixed communication device or a mobile communication device. Signals can be carried on a wired or wireless carrier.

[0003] As an example of a cellular communication system, there is an architecture standardized by the 3rd Generation Partnership Project (3GPP). Recent developments in this field are often referred to as the Long Term Evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio access technology. E-UTRA (Evolved UMTS Terrestrial Radio Access) is the air interface of the 3GPP Long Term Evolution (LTE) upgrade path for mobile networks. In LTE, a base station or access point (AP) called an evolved Node B (eNB) provides wireless access within a coverage area or cell. In LTE, a mobile device or mobile station is called a user equipment (UE). LTE has received many improvements or developments.

[0004] Facing a global bandwidth shortage, wireless carriers have been encouraged to consider, for example, millimeter waves (mmWaves) that have not been utilized, for future broadband cellular communication networks. Millimeter waves (or extremely high frequencies) can include, for example, a frequency range of 30 to 300 gigahertz (GHz). Radio waves within this band have, for example, wavelengths of 10 to 1 millimeter and are called the millimeter band or millimeter waves. The amount of wireless data is expected to increase significantly in the coming years. To address this issue, various techniques have been used, including obtaining additional spectrum, reducing cell size, and using improved technologies that enable more bits / s / Hz. One element that can be used to obtain additional spectrum is to shift to higher frequencies above 6 GHz. In the fifth-generation wireless system (5G), an access architecture has been proposed for deploying cellular wireless devices that employ the millimeter-wave wireless spectrum. Other spectrum examples such as the centimeter-wave wireless spectrum (3 to 30 GHz) can also be used.

[0005] MIMO (Multiple-Input Multiple-Output) is a wireless communication antenna technology that uses multiple antennas at both the source (transmitter) and the destination (receiver) for error reduction and / or data speed improvement. SUMMARY OF THE INVENTION MEANS FOR SOLVING THE PROBLEM

[0006] According to an embodiment example, a method includes: a base station determining an uplink data channel power control parameter set for an uplink data channel beam pair; the base station determining a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; the base station selecting, based on the uplink data channel beam pair that matches the sounding reference signal beam pair, an uplink data channel power control parameter set that a user equipment should use to adjust the sounding reference signal transmission power; and the base station receiving, via the sounding reference signal resource and the sounding reference signal beam pair, a sounding reference signal from the user equipment at the sounding reference signal transmission power set based on the uplink data channel power control parameter set.

[0007] According to an embodiment example, an apparatus includes at least one processor and at least one memory including computer instructions, and when the computer instructions are executed by the at least one processor, the apparatus is caused to: have the base station determine an uplink data channel power control parameter set for an uplink data channel beam pair; have the base station determine a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; have the base station select, based on the uplink data channel beam pair that matches the sounding reference signal beam pair, an uplink data channel power control parameter set that a user equipment should use to adjust the sounding reference signal transmission power; and have the base station receive, via the sounding reference signal resource and the sounding reference signal beam pair, a sounding reference signal from the user equipment at the sounding reference signal transmission power set based on the uplink data channel power control parameter set.

[0008] According to an embodiment, an apparatus includes means for a base station to determine an uplink data channel power control parameter set for an uplink data channel beam pair; means for the base station to determine a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; means for the base station to select an uplink data channel power control parameter set to be used by a user equipment to adjust a sounding reference signal transmission power based on an uplink data channel beam pair that matches the sounding reference signal beam pair; and means for the base station to receive, from the user equipment via a sounding reference signal resource and the sounding reference signal beam pair, a sounding reference signal at a sounding reference signal transmission power set based on the uplink data channel power control parameter set.

[0009] According to an embodiment, a computer program product includes a computer-readable storage medium storing executable code that, when executed by at least one data processing device, causes the at least one data processing device to perform a method including: a base station determining an uplink data channel power control parameter set for an uplink data channel beam pair; the base station determining a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; the base station selecting an uplink data channel power control parameter set to be used by a user equipment to adjust a sounding reference signal transmission power based on an uplink data channel beam pair that matches the sounding reference signal beam pair; and the base station receiving, from the user equipment via a sounding reference signal resource and the sounding reference signal beam pair, a sounding reference signal at a sounding reference signal transmission power set based on the uplink data channel power control parameter set.

[0010] According to an embodiment example, a method may include: a user equipment receiving, from a base station, a set of uplink data channel power control parameters for an uplink data channel beam pair; the user equipment determining a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; the user equipment selecting a set of uplink data channel power control parameters for adjusting a sounding reference signal transmission power; the user equipment adjusting, based on the set of uplink data channel power control parameters, a sounding reference signal transmission power of a sounding reference signal to be transmitted via a sounding reference signal resource; and the user equipment transmitting, via the sounding reference signal resource and the sounding reference signal beam pair, the power-adjusted sounding reference signal.

[0011] According to an embodiment example, an apparatus includes at least one processor and at least one memory including computer instructions, which, when executed by the at least one processor, cause the apparatus to: cause a user equipment to receive, from a base station, a set of uplink data channel power control parameters for an uplink data channel beam pair; cause the user equipment to determine a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; cause the user equipment to select a set of uplink data channel power control parameters for adjusting a sounding reference signal transmission power; cause the user equipment to adjust, based on the set of uplink data channel power control parameters, a sounding reference signal transmission power of a sounding reference signal to be transmitted via a sounding reference signal resource; and cause the user equipment to transmit, via the sounding reference signal resource and the sounding reference signal beam pair, the power-adjusted sounding reference signal.

[0012] According to an embodiment, a device includes means for a user equipment to receive from a base station an uplink data channel power control parameter set for an uplink data channel beam pair; means for the user equipment to determine a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; means for the user equipment to select an uplink data channel power control parameter set for adjusting the sounding reference signal transmission power; means for the user equipment to adjust the sounding reference signal transmission power of the sounding reference signal to be transmitted via the sounding reference signal resource based on the uplink data channel power control parameter set; and means for the user equipment to transmit the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0013] According to an embodiment, a computer program product includes a computer-readable storage medium and stores executable code. When the executable code is executed by at least one data processing device, the at least one data processing device is caused to perform a method including steps of: a user equipment receiving from a base station an uplink data channel power control parameter set for an uplink data channel beam pair; the user equipment determining a sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam for a sounding reference signal resource; the user equipment selecting an uplink data channel power control parameter set for adjusting the sounding reference signal transmission power; the user equipment adjusting the sounding reference signal transmission power of the sounding reference signal to be transmitted via the sounding reference signal resource based on the uplink data channel power control parameter set; and the user equipment transmitting the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0014] According to an example embodiment, a method may include a user equipment separately selecting, for each of a plurality of sounding reference signal resources, a set of uplink data channel power control parameters for an uplink data channel beam pair to be used to adjust the sounding reference signal transmission power of a sounding reference signal beam pair; the user equipment adjusting, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power of the sounding reference signal based on the selected set of uplink data channel power control parameters; and the user equipment transmitting each of the plurality of power-adjusted sounding reference signals via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair.

[0015] According to an example embodiment, an apparatus may include at least one processor and at least one memory including computer instructions that, when executed by the at least one processor, cause the apparatus to cause a user equipment to separately select, for each of a plurality of sounding reference signal resources, a set of uplink data channel power control parameters for an uplink data channel beam pair to be used to adjust the sounding reference signal transmission power of a sounding reference signal beam pair; cause the user equipment to adjust, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power of the sounding reference signal based on the selected set of uplink data channel power control parameters; and cause the user equipment to transmit each of the plurality of power-adjusted sounding reference signals via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair.

[0016] According to an embodiment example, a device includes at least one processor and at least one memory including computer instructions, and when the computer instructions are executed by the at least one processor, the device is caused to perform the following operations: means for the user equipment to individually select, for each of a plurality of sounding reference signal resources, an uplink data channel power control parameter set for an uplink data channel beam pair to be used for adjusting the sounding reference signal transmission power of a sounding reference signal beam pair; means for the user equipment to adjust, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power of the sounding reference signal based on the selected uplink data channel power control parameter set; and means for the user equipment to transmit each of the plurality of power-adjusted sounding reference signals via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair.

[0017] According to an embodiment example, a computer program product includes a computer-readable storage medium and stores executable code, and when the executable code is executed by at least one data processing device, the at least one data processing device is caused to perform the following steps: the user equipment individually selects, for each of a plurality of sounding reference signal resources, an uplink data channel power control parameter set for an uplink data channel beam pair to be used for adjusting the sounding reference signal transmission power of a sounding reference signal beam pair; the user equipment adjusts, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power of the sounding reference signal based on the selected uplink data channel power control parameter set; and the user equipment transmits each of the plurality of power-adjusted sounding reference signals via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair, so as to execute a method including these steps.

[0018] The accompanying drawings and the following description disclose details of one or more embodiments. Other features will become apparent from the description, the drawings, and the claims.

Brief Description of the Drawings

[0019]

Figure 1

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Figure 10

Modes for Carrying Out the Invention

[0020] FIG. 1 is a block diagram of a wireless network 130 according to an exemplary embodiment. In the wireless network 130 of FIG. 1, user devices 131, 132, 133, and 135, which may also be referred to as mobile stations (MS) or user equipment (UE), can be connected (and communicate) to a base station (BS) 134, which may also be referred to as an access point (AP), an enhanced Node B (eNB), or a network node. At least some of the functions of the access point (AP), base station (BS), or (e)Node B (eNB) can also be performed by any node, server, or host that can be operably coupled to a transceiver such as a remote radio head. The BS (or AP) 134 provides wireless coverage within a cell 136 that includes user devices 131, 132, 133, and 135. Although only four user devices are shown as being connected or coupled to the BS 134, any number of user devices may be provided. The BS 134 is also connected to a core network 150 via an S1 interface 151. This is only one simple example of a wireless network, and others may be used.

[0021] The user device (user terminal, user equipment (UE)) can be meant to be a portable computer device that includes a wireless mobile communication device that operates regardless of the presence or absence of a subscriber identity module (SIM). By way of example and not limitation, it can include devices of types such as a mobile station (MS), a mobile phone, a cellular mobile phone, a smartphone, a personal digital assistant (PDA), a handset, a device using a wireless modem (such as an alarm device or a measuring device), a laptop and / or a touch screen computer, a tablet, a phablet, a game console, a notebook, and a multimedia device. It should be understood that the user device can also be an almost uplink-only device, such as a camera or a video camera that loads an image or a video clip onto the network.

[0022] As an example, in LTE, a core network 150, sometimes referred to as an evolved packet core (EPC), can include a mobility management entity (MME) that can handle or assist in the mobility / handover of user equipment between multiple BSs, one or more gateways that can transfer data and control signals between the BS and a packet data network or the Internet, and other control functions or control blocks.

[0023] Various embodiments can be applied to various wireless technologies or wireless networks such as LTE, LTE-A, 5G, centimeter and / or millimeter wave band networks, or any other wireless network. LTE, 5G, centimeter and millimeter wave band networks are shown as an example, and various embodiments can be applied to any wireless technology / wireless network.

[0024] Various embodiments can relate to, for example, a 5G wireless access system (or other system) that supports massive MIMO (multiple input multiple output) according to an embodiment for illustration and is optimized to operate at a high carrier frequency such as a centimeter wave frequency (e.g., 3 GHz or higher) or a millimeter wave frequency. Typically, these exemplary systems are characterized by the need for high antenna gain to compensate for increased path loss and the need for high capacity and high spectral efficiency to handle the continuously increasing wireless traffic. According to one embodiment, the increased attenuation at high carrier frequencies can be compensated by introducing, for example, a massive (multi-element) antenna array and corresponding antenna gain via beamforming at the access point (AP) / base station (BS) and / or user equipment. Typically, spectral efficiency can be improved by the number of spatial streams that the system can support and thus the number of antenna ports of the BS. According to one embodiment, spatial multiplexing may include a transmission technique in MIMO wireless communication that transmits independent individually encoded data signals, so-called streams, from each of a plurality of transmit antennas.

[0025] For example, typically, in a massive multiple-input multiple-output (M-MIMO) system, a large number of antenna elements can be used in a transmitter and / or a receiver (e.g., a base station / access point or other network node). Typically, M-MIMO can have more spatial links / layers and can provide more spatial degrees of freedom. In one example, an MIMO or M-MIMO transmitter can generate relatively narrow beams with excellent spatial separation using well-designed antenna weighting. Thus, such a transmitter can achieve high beamforming gain, reduce spatial interference regions, and obtain high multi-user spatial multiplexing gain. Typically, an MIMO or M-MIMO system can have excellent performance in terms of data rate and link reliability compared to other systems.

[0026] For example, as shown in FIG. 1, usually, to cover a cell, a plurality of beams such as beam 1, beam 2, beam 3, and up to N beams are used. However, in many cases, only a part of the beams can be activated simultaneously, for example, to reduce cost and complexity. Therefore, beam sweeping may be utilized to transmit signals over a plurality of periods via each of the plurality of beams or a plurality of sets of beams. Beam sweeping may include activating each beam or a set of a plurality of beams over a plurality of periods. Also, the user equipment may measure the reference signal of each beam and then transmit a beam report to the BS to identify one or more preferred beams (for example, identifying the beam with the highest received power or received signal strength or other channel quality measurement values as one or more preferred or best downlink transmission beams). Therefore, for example, beam sweeping may be performed to generate or activate each of a plurality of sets of beams in the time domain, transmit signals across a cell, or receive signals via different beams. For example, depending on the implementation, at a certain time, only one beam may be activated, or a set of beams (for example, 3 beams, 4 beams, 6 beams, or other numbers of beams) may be activated. For example, the user equipment or the BS may transmit or receive various control signals such as a reference signal (RS) for only one beam at a certain time or for only one set of beams at a certain time.

[0027] Transmission between the user equipment and the BS can be performed via a beam pair, and the beam pair may include the beam applied by the BS and the beam applied by the user equipment. For example, in an uplink transmission from the user equipment to the BS, the beam pair may include the transmission beam applied by the user equipment and the reception beam applied by the BS. Similarly, in a downlink transmission, a beam pair including the transmission beam applied by the BS and the reception beam applied by the user equipment can be used.

[0028] According to an example embodiment, one or more user equipments can transmit uplink data to a BS via an uplink data channel such as a Physical Uplink Shared Channel (PUSCH) channel. According to an example embodiment, a user equipment can perform power control using an uplink data channel (e.g., PUSCH) power control parameter set, and can adjust the transmission power of data (or other signals) transmitted, for example, via the uplink data channel (e.g., via the PUSCH channel). For each of a plurality of beam pairs, different (or beam-specific) uplink data channel (e.g., PUSCH) power control parameter sets can be selected or determined (e.g., different power control parameter sets for each of a plurality of uplink data channel beam pairs or PUSCH beam pairs). For example, each different uplink data channel (or PUSCH) power control parameter set can include at least one parameter having a different value from other (one or more, or all) uplink data channel power control parameter sets.

[0029] Therefore, for example, different (or beam-specific) PUSCH power control parameter sets can be determined or obtained for each of a plurality of PUSCH beam pairs, so that a user equipment can adjust the transmission power for transmitting data on a PUSCH channel via a corresponding beam pair. As described above, in an uplink transmission (from a user equipment to a BS), a beam pair can include a transmission beam of the user equipment (or applied by the user equipment) and a reception beam of the BS (or applied by the BS). For example, a user equipment can perform power control using a PUSCH power control parameter set of a beam pair (or each of a plurality of beam pairs), and can adjust the transmission (or transmission) power of uplink data transmitted uplink via the PUSCH (or uplink data channel). Generally, power control for signal transmission can help, for example, avoid unnecessary interference and reduce power consumption.

[0030] According to an embodiment example, the user equipment can transmit a (uplink) sounding reference signal (SRS) to the BS. For example, the user equipment can transmit a sounding reference signal (SRS) to the BS so that the BS can estimate the uplink channel state at different frequencies. According to an embodiment example, for example, the BS scheduler uses the channel state estimate value to allocate a resource block with good channel quality for uplink PUSCH transmission (for example, uplink channel-dependent scheduling), and can select different transmission parameters (such as data rate, etc.) and different parameters related to uplink multi-antenna transmission. For example, the SRS signal can include a periodic SRS signal transmitted at equal intervals or at a fixed period and an aperiodic SRS signal that is not periodic (for example, not transmitted at equal intervals).

[0031] According to an embodiment example, the SRS signal can be transmitted via a plurality of different time-frequency resources. Since the channel state changes over time and / or frequency, different beam pairs can be determined for each SRS resource. Therefore, for example, each SRS signal transmitted via different SRS resources can have different beam pairs (including, for example, the uplink beam of the user equipment or the receiving beam of the BS) or can be transmitted via different beam pairs. Therefore, in this regard, different beam pairs can exist for each SRS resource.

[0032] Also, power control may be applied for each SRS signal. For example, the transmission power of each SRS signal may be adjusted. According to an embodiment, the user equipment may individually determine for each of a plurality of SRS resources a set of uplink data channel (e.g., PUSCH) channel power control parameters to be used for adjusting the transmission power of the SRS signal. Thus, for example, the set of PUSCH power control parameters selected for use in adjusting the sounding reference signal transmission power may be selected for each SRS resource (or for each SRS signal). The set of PUSCH power control parameters selected for use in the power control of the SRS signal provides a link (correlation) or relationship between the PUSCH transmission power and the SRS signal transmission power, and thus can be referred to as, for example, a linked PUSCH power control parameter set. Since different or independent beam pairs can be provided for each different SRS resource (for each SRS signal transmitted via a different SRS resource), different and / or independent sets of PUSCH power control parameters may be selected or determined to be used for the power control of each SRS resource / SRS signal.

[0033] According to an embodiment, when the PUSCH beam pair and the SRS beam pair match, the set of linked PUSCH power control parameters for the PUSCH beam pair may be selected for use in performing the power control of the SRS signal / SRS signal resource. Therefore, for example, the beam pair of the SRS signal or SRS resource and the PUSCH beam pair may be made to match (e.g., having the same transmission beam and reception beam). And the set of PUSCH power control parameters for this matching PUSCH beam pair may be selected as the set of linked PUSCH power control parameters used by the user equipment when adjusting the SRS signal transmission power of the SRS resource.

[0034] According to an example embodiment, the user equipment may select or determine a set of linked PUSCH power control parameters for a certain SRS resource using different techniques. For example, the user equipment may: 1) determine that the PUSCH (i.e., uplink data channel) beam pair matches the SRS beam pair, and then 2) select a set of PUSCH power control parameters for the PUSCH (i.e., uplink data channel) beam pair having an SRS beam pair that matches the PUSCH beam pair for adjusting the SRS transmission power (for the SRS resource) of the SRS signal having the SRS beam pair that matches the PUSCH beam pair, thereby implicitly determining (e.g., based on the matching beam pair between the PUSCH beam pair and the SRS beam pair) a set of linked PUSCH power control parameters for a certain SRS resource (or each SRS resource). Alternatively, the user equipment may: 1) receive from the BS control information indicating a set of PUSCH power control parameters to be used for adjusting the SRS transmission power for each of a plurality of SRS resources, and 2) select, based on the control information for each of the plurality of received SRS resources, a set of linked PUSCH (i.e., uplink data channel) power control parameters to be used for power control of each of the plurality of SRS signals or SRS resources, thereby explicitly determining (e.g., based on the control information received from the BS) the set of linked PUSCH power control parameters.

[0035] According to an example embodiment, control information from the BS indicating a set of linked PUSCH power control parameters for each of a plurality of SRS signals / SRS resources can be transmitted to the user equipment via a higher layer signal (e.g., via radio resource control (RRC) signaling) for periodic SRS signals and via a lower layer signaling (e.g., via downlink control information (DCI) of a physical downlink control channel (PDCCH)) for aperiodic SRS signals.

[0036] Also, the user equipment can receive from the BS information for identifying the numerology for SRS transmission (e.g., used for power control of the SRS signal). For example, for different numerologies, there may be different sets of PUSCH power control parameters with links. Also, the set of PUSCH power control parameters for a PUSCH beam pair and the set of PUSCH power control parameters with links for an SRS resource / SRS beam pair may have the same numerology. For example, the numerology includes information on different amounts, lengths, or intervals related to one or more transmission characteristics or communication characteristics. Therefore, for example, as an example, the numerology includes subcarrier spacing, subframe (or slot) length, OFDM symbol period, or other time / frequency characteristics. Therefore, for example, in at least some examples, since a 5G BS or user equipment may have backward compatibility with LTE / 4G or other standards, a 5G radio / network device may support different numerologies (e.g., 5G numerology and 4G numerology).

[0037] Also, the user equipment may receive a channel state information-reference signal (CSI-RS) to measure or obtain path loss, for example, obtain path loss for each of a plurality of beam pairs. The user equipment may receive from the BS an indication of an SRS power offset (e.g., related to the transmission power of the PUSCH power signal) that can be used when setting or adjusting the SRS transmission power. Therefore, in one example embodiment, the user equipment may adjust or set the transmission power of a certain SRS signal (or each SRS signal) based on, for example, a set of PUSCH power control parameters with links for the SRS signal / SRS resource, the numerology of the SRS signal / SRS resource, the power offset (e.g., SRS power offset), and the path loss (e.g., path loss for or corresponding to the SRS beam pair).

[0038] Also, as described above, the user equipment can also perform beam sweeping for beam management, for example, to report the latest preferred (or best) beam information to the BS (e.g., in this case, the user equipment can receive and measure signals of different beams / beam pairs, and select or report one or more preferred or best beam pairs or the best / preferred downlink transmission beam to the BS). When setting the SRS transmission power for beam sweeping for beam management, the user equipment can select / use one set of link-associated PUSCH power control parameters for all (or a plurality of) SRS beam pairs (instead of using different or beam-specific PUSCH power control parameter sets). For example, during beam sweeping for beam management, the user equipment may select / use the set of PUSCH power control parameters that was most recently used to transmit data via the PUSCH channel as the set of link-associated PUSCH power control parameters for all (or at least a plurality of) SRS signals / SRS resources. The reason for this is that, for example, during beam management, the user equipment may not recognize the best or preferred (single or multiple) beam pairs for different resources. According to another example, the user equipment may select the set of link-associated PUSCH power control parameters signaled or indicated by the BS to the user equipment.

[0039] Example 1: FIG. 2 is a flowchart showing the operation of a base station according to an embodiment. Operation 210 includes the step of the base station determining an uplink data channel power control parameter set for an uplink data channel beam pair. Operation 220 includes the step of the base station determining a sounding reference signal beam pair including a base station reception beam and a user equipment transmission beam for a sounding reference signal resource. Operation 230 includes the step of the base station selecting an uplink data channel power control parameter set to be used by the user equipment to adjust the sounding reference signal transmission power based on the uplink data channel beam pair that matches the sounding reference signal beam pair. Further, operation 240 includes the step of the base station receiving from the user equipment via the sounding reference signal resource and the sounding reference signal beam pair a sounding reference signal having a sounding reference signal transmission power set based on the uplink data channel power control parameter set.

[0040] Example 2: In the embodiment of Example 1, the step of determining the uplink data channel power control parameter set includes determining a first uplink data channel power control parameter set for a first uplink data channel beam pair and a second uplink data channel power control parameter set for a second uplink data channel beam pair, and includes the step of determining an uplink data channel power control parameter set for each of a plurality of uplink data channel beam pairs; the step of determining the sounding reference signal beam pair of the sounding reference signal resource includes determining a first sounding reference signal beam pair for a first sounding reference signal resource and a second sounding reference signal beam pair for a second sounding reference signal resource, and includes the step of determining a sounding reference signal beam pair for each of a plurality of sounding reference signal resources; the step of selecting includes selecting a first uplink data channel power control parameter set for a first uplink data channel beam pair that the user equipment should use to adjust the sounding reference signal transmission power for the first sounding reference signal resource based on the match between the first uplink data channel beam pair and the first sounding reference signal beam pair, and selecting a second uplink data channel power control parameter set for a second uplink data channel beam pair that the user equipment should use to adjust the sounding reference signal transmission power for the second sounding reference signal resource based on the match between the second uplink data channel beam pair and the second sounding reference signal beam pair.

[0041] Example 3: In the embodiment of Example 1 or 2, the uplink data channel power control parameter set for the uplink data channel beam pair includes a physical uplink shared channel (PUSCH) power control parameter set for the PUSCH beam pair.

[0042] Example 4: In any of the embodiments of Examples 1 to 3, the method further includes a step in which a base station transmits control information for identifying an uplink data channel power control parameter set to be used for adjusting the transmission power of a sounding reference signal to a user equipment.

[0043] Example 5: In any of the embodiments of Examples 1 to 4, the control information is transmitted via upper layer signaling for a periodic sounding reference signal, and the control information is transmitted via lower layer signaling for an aperiodic sounding reference signal.

[0044] Example 6: In any of the embodiments of Examples 1 to 5, the control information is transmitted via radio resource control (RRC) signaling for a periodic sounding reference signal, and the control information is transmitted via physical downlink control channel (PDCCH) downlink control information (DCI) for an aperiodic sounding reference signal.

[0045] Example 7: In any of the embodiments of Examples 1 to 6, the control information is provided via physical downlink control channel (PDCCH) downlink control information (DCI), and includes control information for identifying 1) a sounding reference signal parameter set to be used for transmitting a sounding reference signal, which is configured by upper layer signaling, and 2) an uplink data channel power control parameter set to be used for adjusting the transmission power of the sounding reference signal.

[0046] Example 8: In any of the embodiments of Examples 1 to 3, the method further includes a step in which a base station transmits information for identifying a numerology to be used by a user equipment for sounding reference signal transmission to the user equipment.

[0047] Example 9: In any of the embodiments of Examples 1 to 8, the method further includes a step in which a base station transmits information for identifying a power offset of the transmission power of a sounding reference signal related to an uplink data channel to a user equipment.

[0048] Example 10: In any of the embodiments of Examples 1 to 9, the base station further includes a step of transmitting channel state information-reference signals to the user equipment so that the user equipment can identify the path loss of one or more beam pairs.

[0049] Example 11: According to an embodiment, an apparatus includes at least one processor and at least one memory including computer instructions, and when the computer instructions are executed by the at least one processor, causes the apparatus to execute any of the methods of Examples 1 to 10.

[0050] Example 12: An apparatus includes means for executing any of the methods of Examples 1 to 10.

[0051] Example 13: An apparatus includes a computer program product including a non-transitory computer-readable storage medium storing executable code, and when the executable code is executed by at least one data processing device, is configured to cause the at least one data processing device to execute any of the methods of Examples 1 to 10.

[0052] Example 14: FIG. 3 is a flowchart showing the operation of a user device according to an embodiment. Operation 310 includes the step of the user device receiving an uplink data channel power control parameter set for an uplink data channel beam pair from a base station. Operation 320 includes the step of the user device determining a sounding reference signal beam pair including a base station receiving beam and a user device transmitting beam for a sounding reference signal resource. Operation 330 includes the step of the user device selecting an uplink data channel power control parameter set to adjust the sounding reference signal transmission power. Operation 340 includes the step of the user device adjusting the sounding reference signal transmission power for the sounding reference signal transmitted via the sounding reference signal resource based on the uplink data channel power control parameter set. Operation 350 includes the step of the user device transmitting the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0053] Example 15: In the embodiment of Example 14, the step of receiving the uplink data channel power control parameter set includes the step of receiving a first uplink data channel power control parameter set for a first uplink data channel beam pair and the step of receiving a second uplink data channel power control parameter set for a second uplink data channel beam pair, and includes the step of receiving an uplink data channel power control parameter set for each of a plurality of uplink data channel beam pairs; the step of determining the sounding reference signal beam pair includes the step of determining a first sounding reference signal beam pair for a first sounding reference signal resource and the step of determining a second sounding reference signal beam pair for a second sounding reference signal resource, and includes the step of determining a sounding reference signal beam pair for each of a plurality of sounding reference signal resources; the step of selecting includes the step of selecting a first uplink data channel power control parameter set for adjusting the sounding reference signal transmission power of the first sounding reference signal resource and a second uplink data channel power control parameter set for adjusting the sounding reference signal transmission power of the second sounding reference signal resource.

[0054] Example 16: In the embodiment of Example 14 or 15, the step of selecting includes the step of the user equipment determining that the uplink data channel beam pair matches the sounding reference signal beam pair, and the step of the user equipment selecting an uplink data channel power control parameter set for adjusting the sounding reference signal transmission power based on the uplink data channel beam pair matching the sounding reference signal beam pair.

[0055] Example 17: In any of the embodiments of Examples 14 to 16, the selecting step includes: the user equipment receiving control information from the base station indicating that the user equipment should use an uplink data channel power control parameter set to adjust the sounding reference signal transmission power; and the user equipment selecting an uplink data channel power control parameter set for adjusting the sounding reference signal transmission power based on the received control information.

[0056] Example 18: In any of the embodiments of Examples 14 to 17, the uplink data channel power control parameter set for an uplink data channel beam pair includes a physical uplink shared channel (PUSCH) power control parameter set for a PUSCH beam pair.

[0057] Example 19: In any of the embodiments of Examples 14 to 18, the control information is received via upper layer signaling for periodic sounding reference signals, and the control information is received via lower layer signaling for aperiodic sounding reference signals.

[0058] Example 20: In any of the embodiments of Examples 14 to 19, the control information is received via radio resource control (RRC) signaling for periodic sounding reference signals, and the control information is received via physical downlink control channel (PDCCH) downlink control information (DCI) for aperiodic sounding reference signals.

[0059] Example 21: In any of the embodiments of Examples 14 to 20, the control information includes control information for identifying, via physical downlink control channel (PDCCH) downlink control information (DCI), 1) a sounding reference signal parameter set to be used for transmitting a sounding reference signal configured by upper layer signaling, and 2) an uplink data channel power control parameter set to be used for adjusting the sounding reference signal transmission power.

[0060] Example 22: In any of the embodiments of Examples 14 to 21, the step of the user equipment receiving information for identifying the numerology to be used by the user equipment for transmitting the sounding reference signal, the step of the user equipment receiving information for identifying the power offset of the sounding reference signal transmission power for the uplink data channel, the step of the user equipment receiving the channel state information-reference signal for enabling the user equipment to determine the path loss corresponding to the sounding reference signal beam pair, and the step of identifying the path loss corresponding to the sounding reference signal beam pair based on the channel state information-reference signal, and the adjusting step includes the step of the user equipment adjusting the sounding reference signal transmission power based on the uplink data channel power control parameter set, numerology, power offset, and path loss.

[0061] Example 23: In any of the embodiments of Examples 14 to 22, the method further includes the step of the user equipment receiving information for identifying the numerology to be used by the user equipment for transmitting the sounding reference signal, and the sounding reference signal and the uplink data channel using the same beam pair have the same numerology.

[0062] Example 24: In any of the embodiments of Examples 14 to 23, when performing beam sweeping for beam management, the method further includes the step of adjusting the sounding reference signal transmission power of each of a plurality of sounding reference signal beams using one uplink data channel power control parameter set.

[0063] Example 25: In any of the embodiments of Examples 14 to 24, one uplink data channel power control parameter set includes the uplink data channel power control parameter set used for transmitting uplink data to the base station via the uplink data channel.

[0064] Example 26: The apparatus includes at least one processor and at least one memory including computer instructions, and when the computer instructions are executed by the at least one processor, causes the apparatus to perform any of the methods of Examples 14 - 25.

[0065] Example 27: The apparatus includes means for performing any of the methods of Examples 14 - 25.

[0066] Example 28: FIG. 4 is a flowchart showing the operation of a user device according to another embodiment. Operation 410 includes the step of the user device independently selecting, for each of a plurality of sounding reference signal resources, an uplink data channel power control parameter set for an uplink data channel beam pair used to adjust the sounding reference signal transmission power of a sounding reference signal beam pair. Operation 420 includes the step of the user device adjusting, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power of the sounding reference signal based on the selected uplink data channel power control parameter set. Operation 430 includes the step of the user device transmitting each of the plurality of power - adjusted sounding reference signals via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair.

[0067] Example 29: In the embodiment of Example 28, the selecting step includes, for each of the plurality of sounding reference signal resources, independently determining that an uplink data channel beam pair matches a sounding reference signal beam pair, and the user device, based on the uplink data channel beam pair matching the sounding reference signal beam pair, selecting an uplink data channel power control parameter set for the uplink data channel beam pair to adjust the sounding reference signal transmission power of the sounding reference signal having the sounding reference signal beam pair that matches the uplink data channel beam pair.

[0068] Example 30: In the embodiment of Example 28 or 29, the selection step includes: the user equipment receiving, from the base station, control information indicating, for each of a plurality of sounding reference signal resources, an uplink data channel power control parameter set to be used for adjusting the sounding reference signal transmission power; and the user equipment selecting, based on the control information for each of the plurality of received sounding reference signal resources, an uplink data channel power control parameter set for adjusting the sounding reference signal transmission power.

[0069] Example 31: In any of the embodiments of Examples 28 to 30, the uplink data channel power control parameter set for each uplink data channel beam pair includes a physical uplink shared channel (PUSCH) power control parameter set for the PUSCH beam pair.

[0070] Example 32: The apparatus includes at least one processor and at least one memory including computer instructions that, when executed by the at least one processor, cause the apparatus to perform any of the methods of Examples 28 to 31.

[0071] Example 33: The apparatus includes means for performing any of the methods of Examples 28 to 31.

[0072] Various embodiments relate to wireless systems that support massive MIMO (m-MIMO) (e.g., 5G). These systems are characterized by a larger number of antennas, better beamforming, and higher antenna gain. Specifically, it relates to an enhanced sounding reference signal (SRS) power control scheme based on flexible beam switching on both the transmitter side and / or the receiver side. In an improved or more accurate SRS power control mechanism, interference from adjacent cells is reduced, so the SRS capacity can be increased. Also, the power consumption of the UE can be reduced.

[0073] In one example embodiment, the power control of the SRS signal is generally linked (associated) to the power control of the PUSCH signal by one offset value. Specifically, the SRS power control can be described as follows, or at least based on the following equation.

[0074]

Equation

[0075] The unit is [dBm]. Here, P CMAX,c (i) is the maximum allowable transmit power set for a specific cell c, and M SRS,c (i) is the number of uplink PRBs (physical resource blocks) for SRS transmission, and P of (each UE) O_PUSCH,c (j) is the quasi-static nominal power of the PUSCH, PLc is the downlink path loss in dB of the serving cell c estimated at the UE (each beam may have its own path loss), αc(j) is a cell-specific path loss correction factor for balancing the cell average throughput and the cell edge throughput, fc(i) is the PUSCH closed-loop power adjustment unit of the serving cell c, and P SRS_OFFSET,c (m) is an offset value for power adjustment related to PUSCH power control that is set quasi-statically by the upper layer (e.g., by RRC signaling). Two independent offset values may be used for periodic and aperiodic SRS.

[0076] As an example, the PUSCH power control parameter set that may include one or more parameters that can be used to determine the transmit power of the PUSCH signal includes M SRS,c (i), PL cOne or two or more including αc(j) and / or fc(i), or all may be included (additional parameters may be included). As will be described in more detail herein, the linked PUSCH power control parameter set may be selected for use in adjusting the sounding reference signal transmission power of each of one or more SRS signals / SRS resources, for example, based on the beam pair used by the PUSCH signal and the SRS signal / SRS resource.

[0077] There may be a plurality (or a large number) of PUSCH power control parameter sets including the PUSCH power control parameter set for each PUSCH beam pair and the linked PUSCH power control parameter set for the SRS beam pair. This can enable or provide an independent relationship between the SRS power and the PUSCH power for different beam pairs. Different situations may exist for the plurality of power control parameter sets, and in all or a plurality of power control parameter sets, one or two or more of the parameters may be different and / or one or two or more parameters may be common. The following are some exemplary cases.

[0078] Case 1: The PUSCH power control parameter set includes an independent path loss, and other parameters (P0_PUSCH, alpha) may be common to all parameter sets or beam pairs. There may be one process for determining fc for all parameter sets / beam pairs, and the power offset value may be the same or different for different parameter sets.

[0079] Case 2: The parameter set includes p0, alpha, path loss, and fc, offset. All parameters are independent for different beam pairs / parameter sets, and each parameter set may be for one beam pair or associated with one beam pair. Therefore, situation 2 relates to the most general situation where each parameter set includes a plurality of parameters that are independent for all parameters.

[0080] Case 3: The parameter set may include independent path loss and fc, P0_PUSCH and alpha are common to all parameter sets, and the power offset values may be the same or different for different parameter sets. Various embodiments of an SRS power control scheme extended by flexible uplink / downlink beams for SRS transmission will be described.

[0081] According to an embodiment, both the transmission beam and / or the reception beam may be flexibly changed, for example, according to network requirements and channel transmission conditions. For example, in a UE, the beam pair (transmission beam and / or reception beam) for PUSCH may be different from the beam pair for SRS (e.g., may be different within the same type of network). Therefore, for example, the beam pair for SRS may not be the same as the beam (beam pair) used for the latest uplink transmission of PUSCH (uplink data channel). Rather, according to an embodiment, the beam pair for PUSCH and the beam pair for SRS may change independently.

[0082] FIG. 5 is a diagram showing different beam pairs for PUSCH and SRS according to an embodiment. Scenario 1: When multiple UEs are multiplexed for transmission, the requirements for beam reception may not be the same. For some UEs, a quasi-optimal gNB (5G BS) reception beam may be selected to ensure (or provide) multiplexing with other UEs. As an example shown in FIG. 5, even though the link with beam 1 has better channel quality, UE1 may need to change the PUSCH transmission beam from beam 1 to beam 2 to perform (or correspond to) multiplexing with UE2 within one subframe. If an SRS is triggered to obtain CSI (channel state information) for the link with beam 2, the beam for SRS transmission will be different from the beam for previous PUSCH transmissions such as beam 1 (since the BS can use only one RX / reception beam at a time).

[0083] FIG. 6 is a diagram showing different beam pairs for PUSCH and SRS signals in a heterogeneous network. Scenario 2: As shown in FIG. 6, when the gNB (5G BS) determines that the link quality of beam 1 is not so good, it may search for or desire to obtain CSI of other beams. In this case, the gNB / BS may trigger SRS transmission using a desired beam that may be different from the beam used in the most recent PUSCH transmission. In this example, different transmission powers may be used in a heterogeneous network (including, for example, different transmit / receive points, different BSs), whereby different transmission powers for PUSCH and SRS, and thus different beams, may result. In a heterogeneous (multiple transmit points such as each UE) network, the transmit beam and / or receive beam for PUSCH and SRS may be different. For example, by utilizing channel reciprocity, SRS can be used to obtain downlink CSI. Since the transmission power can be different at different transmit points, the downlink beam and the uplink beam may be different. As shown in FIG. 6, SRS is used to obtain downlink CSI and is linked to a downlink beam that is not the same as the uplink beam of PUSCH. Thus, for example, SRS must be TX (transmitted) with a higher transmission power DL (downlink) and the same beam as the DL data, and for example, the BS may obtain DL CSI using the SRS signal based on channel reciprocity. Thus, for example, different beam pairs (or at least independent beam pairs) may be used for PUSCH and SRS or different beam pairs may be required.

[0084] Impact of Multiple SRS Resources According to an embodiment example, according to the capabilities of the UE, a plurality of SRS resources (K>1) (a plurality of time-frequency SRS resources for transmitting SRS signals) may be configured for one UE. Different SRS resources can be used to realize different functions such as uplink and downlink CSI acquisition, uplink beam management (selection and reporting methods of uplink and downlink beam pairs). For example, since there are multiple functions and requirements, beamforming (beam pairs) or precoding on different SRS resources may also be different. Different precoding may be used for the precoded SRS for uplink CSI that can be transmitted to the same or different transmission points and thus received by the same or different Rx beams at the gNB. Also, for example, multiple beam sweeps may be used for beam management - signals may be applied to a set of multiple beams and swept through each beam or beam set. Therefore, the beamforming gain (which means different beams) may be different for different SRS resources. Therefore, according to an embodiment example, a flexible relationship can be provided between the PUSCH power control parameter set used for PUSCH power control and SRS power control. For example, based on the correspondence between the PUSCH beam pair and the SRS beam pair, the PUSCH power control parameter set can be linked to the SRS signal for SRS power control.

[0085] According to an embodiment example, a more accurate SRS power control scheme that can be particularly advantageous for operations using flexible beamforming for, for example, an m-MIMO system is provided or described. According to an embodiment example, the relationship of the power control parameter set between PUSCH and SRS can be determined using explicit signaling (control information from the BS indicating a link-attached PUSCH power control parameter set for the SRS signal / SRS resource), or an implicit determination of the link-attached PUSCH power control parameter set for the SRS signal by the UE / user equipment. In this way, the change in the beamforming gain (different beam pairs) of SRS can be corrected by an appropriately selected link-attached PUSCH power control parameter set (used in the adjustment of SRS transmission power). When configuring a plurality of SRS resources, the link of the power control parameter set between PUSCH and SRS can be determined for each SRS resource due to flexible beamforming on different SRS resources. In beam management SRS, one PUSCH power control parameter set can be used for the link of all or a plurality of SRS signals / SRS resources. For example, since the information of all sweeping beams is limited, for example, the latest PUSCH power control parameter set or the default PUSCH power control parameter set can be used for SRS power control.

[0086] Relationship of the power control parameter set between SRS and PUSCH According to an embodiment example, the UE can use different parameter sets for SRS power control, and the BS may indicate (may signal to the UE) which power control parameter set is used for SRS power control. Each parameter can have different values for one or more parameters of the power control parameter set, such as P0, (alpha), path loss and / or closed-loop related parameters, fc, etc.

[0087] Therefore, for example, in order to support flexible beamforming for data transmission, different PUSCH power control parameter sets can be used for PUSCHs with different beam pairs, and these can be used to adjust the power of the PUSCH signal. For example, different parameter sets (UL TX / transmission beam at the UE and UL RX / reception beam at the BS) can be used for each PUSCH beam pair. One case: each beam pair may require a different parameter set. One PUSCH power control parameter set associated with a link defines the relationship (i.e., the correlation) between the SRS power and the PUSCH power. For multiple PUSCH power control parameter sets, at least one of the multiple PUSCH power control parameter sets, which may include open-loop related parameters, P0, (alpha), path loss, and / or closed-loop related parameters, fc, etc., can be different.

[0088] According to an embodiment, a PUSCH power control parameter set associated with a link (one of the multiple PUSCH power control parameter sets) can be selected and used, for example, for SRS power control for each SRS resource or for one or more SRS resources. The selection of the PUSCH power control parameter set (the PUSCH power control parameter set associated with a link) for the SRS may include, or be accompanied by, one or more of the following.

[0089] 1) Determine multiple PUSCH power control parameter sets (one parameter set for each PUSCH beam pair) for PUSCH power control.

[0090] 2) Determine the beam pair for each SRS resource (or one or more SRS resources).

[0091] 3) Based on the matching between the beam pair for PUSCH and the beam pair for SRS, determine, for each SRS resource, a set of link - associated PUSCH power control parameters used to determine the power of the SRS signal (for SRS power control). For example, for a given SRS beam pair, select a set of PUSCH parameters having a beam pair that matches the SRS beam pair.

[0092] 4) Explicit option: Then, the BS transmits to the UE an index that identifies the set of PUSCH power control parameters to be used (for the SRS beam pair).

[0093] A) For example, the index for the set of PUSCH power control parameters may be indicated by 2 bits - explicit dynamic signaling (e.g., signaling this index using DCI within the PDCC).

[0094] B) Refer to Table 1 - combination of upper - layer (e.g., RRC) signaling and dynamic signaling: The SRS parameter set is reported via upper - layer signaling (e.g., RRC signaling) and lower - layer signaling, and the link - associated PUSCH power control parameter set can be reported using, for example, PDCCH DCI.

[0095] C) High - level signaling such as RRC may be slow in indicating this index (not as fast as PDCCH DCI), and since the periodic SRS beam is pre - configured by the BS, high - level signaling can be used to report the set of link - associated PUSCH power control parameters for periodic SRS. Therefore, the BS may transmit to the UE the set of link - associated PUSCH power control parameters before SRS transmission for use with that beam. For reporting the set of link - associated PUSCH power control parameters for aperiodic SRS, PDCCH may be used.

[0096] 5) Implicit Option: The beam pair may be included in the PUSCH parameter set and the SRS parameter set. Therefore, when the BS (and UE) recognizes its beam and the PUSCH parameter set for PUSCH transmission, it also recognizes the linked PUSCH parameter set for SRS with the same beam pair. Therefore, the UE and BS both recognize the beam pair for PUSCH and SRS (e.g., based on the coincidence of the beam pair for SRS and the beam pair for PUSCH), and both recognize the linked PUSCH power control parameter set for SRS power control. Therefore, the UE can implicitly determine the linked PUSCH power control parameter set for SRS with the same beam pair. Therefore, in this case, it is not necessary to signal the index of the linked PUSCH power control parameter set for each SRS / SRS resource.

[0097] FIG. 7 is a diagram showing explicit dynamic signaling according to an embodiment example. Explicit dynamic signaling instructions for association. For example, in order to ensure sufficiently flexible beamforming for both SRS and PUSCH, dynamic signaling may be used to indicate a set of link-based PUSCH power control parameters (which may include P0, alpha, path loss, etc.) for determining the SRS transmission power. An example of dynamic signaling is shown in FIG. 7. The dynamic signaling indicates to the UE a set of link-based PUSCH power control parameters 1 to be used for SRS power control according to beam pair 1 used for the SRS transmission link. There may be one specific offset value for each set of power control parameters between the SRS and the linked PUSCH. Since this scheme has sufficient flexibility, it can be used for power control of aperiodic SRS. In the example shown in FIG. 7, for example, based on the match between the PUSCH beam pair (TX beam 1 / Rx beam 1) and the SRS beam pair (TX / transmission beam 1, Rx / reception beam 1), dynamic explicit signaling may be used to signal to the UE the use of the set of PUSCH power control parameters 1 corresponding to the PUSCH transmission beam 1 and reception beam 1.

[0098] To trigger aperiodic SRS transmission, this dynamic signaling may be used, for example, via PDCCH DCI. To provide a good trade-off between the overhead of dynamic signaling and the flexibility of SRS transmission, upper layer signaling (e.g., RRC / Radio Resource Control signaling) may be used in combination with the dynamic signaling of the lower layer (e.g., PDCCH DCI). For example, the dynamic signaling may indicate an SRS transmission parameter set corresponding to one state. For example, 2-bit dynamic signaling can be used to indicate three states (e.g., referring to Table 1) (the fourth state is not triggered). The SRS transmission parameters are configured (communicated to the UE) for each state by upper layer (e.g., RRC) signaling. For example, the SRS transmission parameters communicated to the UE via upper layer signaling include, for example, transmission comb, start physical resource block allocation, srs-ConfigIndex, SRS bandwidth, frequency hopping bandwidth, cyclic shift, and number of antenna ports. As shown in Table 1, according to an exemplary embodiment, an index or value of the SRS request field may be used to indicate to the UE 1) an SRS transmission parameter set, 2) a linked PUSCH power control parameter set, and 3) the numerology for the SRS resource. For example, SRS and the linked PUSCH having the same power control parameter set may typically have the same numerology.

[0099]

Table 1

[0100] Table 1 - SRS request field / index for identifying the linked PUSCH power control parameter set for the SRS signal (e.g., for dynamic explicit signaling such as aperiodic SRS). The index or SRS request field can also indicate an SRS transmission parameter set, numerology, etc.

[0101] When a pair of transmission and reception beams is predefined for SRS transmission, the index of the PUSCH power control parameter set associated with the link can be indicated using upper layer signaling. For example, periodic SRS can be used to obtain CSI of different beam pairs determined by beam management. The gNB can determine the index of the PUSCH power control parameter set by the same beam pair based on the beam pair of the PUSCH and SRS used.

[0102] For example, when the UE cannot obtain the reception beamforming information, signaling (indicating the link) may be required to indicate the PUSCH power control parameter set associated with the link for the SRS signal. Also, for example, when all beam pair information is included in the transmission parameters of the PUSCH and SRS, the UE may implicitly determine the PUSCH power control parameter set used for determining the SRS transmission power according to the principle of the same beam pair between the PUSCH and SRS.

[0103] Power control of multiple SRS resources. Since different beamforming (different beam pairs) may be used for different SRSs, the relevance with the PUSCH power control parameter sets for different SRS resources may be (or should be) defined. This relevance can be determined according to the beam pair of each SRS resource used to perform accurate power control of the SRS. Therefore, the relevance of the PUSCH power control parameter sets for SRS power control (of the SRS signal) can be determined for each SRS resource. This relevance can be obtained for each resource, for example, by explicit signaling (control information indicating the linked PUSCH power control parameter sets for each SRS resource / SRS signal transmitted by the BS), or by implicit determination (based on, for example, the SRS beam pair that matches the PUSCH beam pair). When different numerologies are used on different SRS resources, it can be defined that the same numerology is used for the SRS and the linked PUSCH having the same power control parameter set for each SRS resource configuration. For example, when transmitting SRS within one OFDM (Orthogonal Frequency Division Multiplexing) symbol on multiple resources having different frequency bands, the same link (the same linked PUSCH power control parameter set for each SRS) can be assumed by ensuring good PAPR (Peak-to-Average Power Ratio) characteristics when using SC-FDMA (Single Carrier Frequency Division Multiple Access) for a power-limited user equipment. That is, for example, a UE having SC-FDMA can receive the same signaling for the link of the PUSCH power control parameter set within different SRS resources (or for different SRS resources).

[0104] FIG. 8 is a diagram showing the relevance (or selection) of PUSCH power control parameter sets for a plurality of SRS resources according to an exemplary embodiment. In beam management SRS, beam sweeping can be used for beam selection (e.g., subframe 1 uses beam 1, subframe 2 uses beam 2, or multiple beams can be activated for each subframe). In this case, for both the gNB / BS and the UE, beam quality cannot be utilized. Furthermore, it is not easy to obtain the corresponding PUSCH power control parameter sets for all beams. Therefore, according to an exemplary embodiment, even if different beams / beam pairs are used for different SRS resources, the same PUSCH power control parameter set may be used for this type of SRS (for all or a plurality of SRS signals). For example, since the point of beam management is to determine the latest preferred (single or multiple) beams for UL (UE TX beam and BS RX beam), the UE and the BS do not necessarily recognize which beam is the best or preferred. For simplicity, the PUSCH power control parameter set (used for the SRS signal) can be associated with the most recently correctly transmitted PUSCH (the UE already recognizes the PUSCH power control parameter set for previously successfully used UL data transmissions, e.g., implicitly recognized by both the UE and the BS during a previous time instance), or one default PUSCH power control parameter set, or the BS can signal one indicated PUSCH power control parameter set to the UE via RRC signaling, etc. In an example of the default PUSCH power control parameter set, it can be associated with a wide beam for robust transmission. Here, only one SRS resource for beam management is assumed.

[0105] Various exemplary features or exemplary embodiments may include, as an example, one or more of the following.

[0106] 1) The BS and the UE may determine a set of link-based PUSCH power control parameters for determining the SRS transmission power according to different configurations, for example, based on the SRS beam pair that matches the PUSCH beam pair.

[0107] A) Dynamic explicit signaling by PDCCH DCI to indicate the index of the set of link-based PUSCH power control parameters.

[0108] B) An implicit principle / decision for the UE to determine the link relationship of the SRS or the set of link-based PUSCH power control parameters based on the matching of the PUSCH beam pair and the RS beam pair.

[0109] 2) The relevance between multiple sets of PUSCH power control parameters for SRS and PUSCH is determined for each SRS resource, for example, based on the SRS beam pair that matches the PUSCH beam pair.

[0110] 3) The same set of PUSCH power control parameters may be used for beam management SRS using beam sweeping. The UE may use one set of link-based PUSCH power control parameters for multiple SRS beam pairs, for example, for SRS beam pairs 1 to 4, use the set of PUSCH parameters for PUSCH beam 1.

[0111] (A) Use the set of PUSCH power control parameters used for previous or the latest PUSCH data transmission (recognized by both the BS and the UE) for multiple SRS resources / SRS beam pairs.

[0112] B) Use the signaled set of PUSCH power control parameters (indicated by the BS to the UE) for multiple SRS resources / SRS beam pairs.

[0113] C) Use a default PUSCH power control parameter set (recognized by both the BS and the UE) for multiple SRS resource / SRS beam pairs.

[0114] 4) Additional signaling may be used to indicate (from the BS to the UE) the numerology for SRS transmission. SRS and the linked PUSCH having the same power control parameter set should have the same numerology. Different numerologies may have different link / linked PUSCH parameter sets (Numerology includes, for example, subcarrier spacing, subframe length (time), time domain (OFDM symbol period), and frequency domain (subcarrier spacing), transmission power, different beam widths). Numerology may include basic time / frequency characteristics. Multiple SRS resources for numerology 1 and multiple SRS resources for numerology 2. For SRS transmission, multiple SRS resources for two different numerologies, such as different beams / beam widths, different possible transmission powers, etc., may need to be included. The BS may indicate the numerology to the UE, for example, via high-level / RRC signaling within the SRS transmission parameter set. The BS may indicate the association (the linked PUSCH power control parameter set for the SRS signal) and the numerology to which the association applies.

[0115] FIG. 9 is a diagram showing the operations of a base station and a user equipment (UE) according to another exemplary embodiment. From the BS side, the BS transmits power control related information to enable the UE to transmit the SRS with an appropriate SRS transmission power. From the UE side, the UE performs measurements and sets / adjusts the SRS transmission power according to the instructions of the gNB / BS, including, for example, dynamic and quasi-static signaling.

[0116] At 910, the gNB (BS) transmits / sends a reference signal such as a beam reference signal (BRS) or a channel state information-reference signal (CSI-RS) for UE path loss measurement via one or two or more beams / beam pairs. Next, the UE performs path loss (PL) measurements, for example, for each of a plurality of beam pairs. For example, the UE performs RSRP (reference signal received power) measurement based on the received CSI-RS and obtains the path loss for each PUSCH beam pair and each PUSCH power control parameter set.

[0117] At 920, the gNB / BS determines a plurality of PUSCH power control parameter sets (values of each parameter, each parameter set) including an open-loop part, P0, α, and a closed-loop part fc for PUSCH having different transmit and receive beam pairs, and transmits them via RRC, and transmits these parameters to the UE by upper layer (the open-loop part is transmitted via RRC) and physical or lower layer signaling (for example, fc may be transmitted via PDCCH / DCI). The UE receives the signaling of the plurality of PUSCH power control parameter sets and the related offset values.

[0118] At 930, for each PUSCH power control parameter set, the gNB / BS configures one power offset (for example, SRS power offset) value between the SRS and the linked PUSCH by upper layer signaling (for example, via RRC signaling), for example, shares one offset value for all PUSCH power control parameter sets, or can have different offset values for different PUSCH power control parameter sets. At 930, the UE determines the transmit power of each SRS resource based on, for example, the signaling of the gNb and the path loss measurement result according to the following formula (for parameter set k, the linked PUSCH power control parameter set can be explicitly signaled or implicitly determined).

[0119]

Number

[0120] The unit is [dBm]. Here, P O_PUSCH,c,k (j), α c、k (j) is indicated by RRC signaling, and PL c、k is obtained by UE measurement, and f c、k (i) is derived by TPC (transmission point) signaling. These parameters are obtained from the PUSCH parameter set k. Regarding the power control parameter set index, the gNb / BS can indicate this information using dynamic (lower layer, e.g., PDCCH DCI) or upper layer signaling (e.g., RRC signaling). Note: In beam management SRS, multiple scanned beams can be used for SRS transmission, but the SRS transmission power may be determined using only one linked PUSCH parameter set. It can be, for example, one default PUSCH power control parameter set, or the most recently used parameter set for correctly transmitted PUSCH.

[0121] At 940, the gNB / BS transmits signaling for each SRS resource indicating the linked PUSCH power control parameter set for determining the SRS transmission power according to the beam pair (transmission and reception beams) used by the UE for SRS transmission that matches the PUSCH beam pair. For aperiodic SRS, the index of the linked PUSCH power control parameter set may be indicated using dynamic signaling (PDCCH / DCI). The index of the linked PUSCH power control parameter set can be included together with the indication of the SRS transmission parameter set for each state indicated by dynamic signaling. For periodic SRS, the index of the PUSCH power control parameter set can be indicated using quasi-static signaling (RRC). Non-explicit option - Signaling for this is not necessary, and the UE determines the association (linked PUSCH power control parameter set for SRS) based on the matching PUSCH beam pair and SRS beam pair.

[0122] At 950, for example, based on a selected / linked PUSCH power control parameter set, the UE transmits each SRS signal via the corresponding SRS resource and at the determined SRS transmission power.

[0123] Various embodiments can have one or more advantages such as performing accurate power control for SRS, for example, to reduce power consumption and inter-cell interference, providing compatibility with flexible SRS configurations, supporting more users using limited SRS resources, and the like.

[0124] FIG. 10 is a block diagram of a wireless station (e.g., an AP or a user device) 1000 according to an embodiment. For example, the wireless station 1000 may include one or two RF (radio frequency) or wireless transceivers 1002A, 1002B, and each transceiver includes a transmitter for transmitting signals and a receiver for receiving signals. The wireless station further includes a processor or control device / entity (controller) 1004 that executes instructions or software to control the transmission and reception of signals, and a memory 1006 that stores data and / or instructions.

[0125] Processor 1004 can make decisions or judgments, generate frames, packets, or messages to be transmitted, decrypt received frames or messages for further processing, and perform other tasks or functions described herein. For example, a processor 1004 such as a baseband processor can generate messages, packets, frames, or other signals to be transmitted via the wireless transceiver 1002 (1002A or 1002B). Processor 1004 can control the transmission of signals or messages via a wireless network and can also control the reception of signals or messages (such as those down-converted by the wireless transceiver 1002) via a wireless network. Processor 1004 is programmable and can execute software or other instructions stored in memory or other computer media to perform various tasks and functions described above, such as one or more of the tasks or methods described above. For example, processor 504 can be (or include) a programmable processor that executes hardware, programmable logic, software, or firmware, and / or any combination thereof. For example, in other words, processor 1004 and transceiver 1002 can be considered an integrated wireless transmitter / receiver system.

[0126] Also, referring to FIG. 10, the controller (or processor) 1008 can execute software and instructions, can perform overall control of station 1000, can control other systems not shown in FIG. 10 such as input / output devices (e.g., a display, a keypad), and / or can execute software of one or more applications that can be provided to the wireless station 1000, such as an email program, an audio / video application, a word processor, a Voice over IP application, or other applications or software.

[0127] Also, when executed by a controller or a processor, a storage medium storing instructions that cause the processor 1004, or another controller or processor, to execute one or more of the above-described functions or tasks can be provided.

[0128] According to another exemplary embodiment, the RF or wireless transceiver 1002A / 1002B can receive signals or data and / or transmit or send signals or data. The processor 1004 (and optionally the transceiver 1002A / 1002B) can control the RF or wireless transceiver 1002A or 1002B to receive, transmit, broadcast, or send signals or data.

[0129] However, the embodiments are not limited to the systems shown as examples, and those skilled in the art can also apply this solution to other communication systems. Another example of a suitable communication system is the 5G concept. The 5G network architecture is assumed to become very similar to the architecture of LTE-Advanced. 5G uses multiple-input multiple-output (MIMO) antennas, far more base stations or nodes than LTE, includes macro sites that cooperate with small cells, and will likely also utilize various radio technologies for improved coverage and enhanced data rates (the so-called small cell concept).

[0130] It should be understood that the future network has a very high possibility of utilizing Network Function Virtualization (NFV), which is a network architecture concept that proposes virtualizing network node functions into "building blocks (basic components)" or entities that can be operably connected or linked to each other to provide services. The virtualized network function (VNF) may include one or more virtual machines that execute computer program code using standard or general-purpose types of servers instead of customized hardware. Cloud computing or data storage can also be utilized. In wireless communication, this may mean that node operations can be at least partially executed at a server, host, or node operably coupled to a remote radio head. Node operations can also be distributed among multiple servers, nodes, or hosts. It should be understood that the distribution of work between core network operations and base station operations may be different from that of LTE or may not exist at all.

[0131] The implementation of the various technologies described herein can be performed in digital electronic circuits or in computer hardware, firmware, software, or combinations thereof. The implementation can also be performed as a computer program product, i.e., a computer program tangibly embodied in an information carrier such as a machine-readable storage device or a propagated signal for execution by, or to control the operation of, a data processing apparatus such as a programmable processor, a computer, or multiple computers. The implementation can also be performed on a computer-readable medium or a computer-readable storage medium, which may be a non-transitory medium. The implementation of the various technologies can include an implementation performed via a transient signal or medium and / or an implementation in a program and / or software that can be downloaded via the Internet or other (single or multiple) networks, regardless of whether it is a wired network and / or a wireless network. The implementation can also be performed via Machine-Type Communication (MTC) or the Internet of Things (IoT).

[0132] A computer program may be in source code form, object code form, or some intermediate form, and may be stored in any kind of carrier, distribution medium, or computer-readable medium that can hold the program, such as any entity or device. For example, such carriers include recording media, computer memories, read-only memories, optoelectronic and / or electrical carrier signals, electrical communication signals, and software distribution packages. The computer program may be executed on a single electronic digital computer or distributed among multiple computers according to the required processing power.

[0133] Furthermore, for the implementation of various technologies described in this specification, a cyber-physical system (CPS) (a system of collaborative computing elements that control physical entities) may be used. CPS can enable the implementation and utilization of a huge amount of interconnected ICT devices (sensors, actuators, processors, microcontrollers, etc.) embedded in physical objects at different locations. A mobile cyber-physical system where the target physical system has inherent mobility is a subcategory of the cyber-physical system. Examples of mobile physical systems include mobile robotics and electronic devices carried by humans or animals. Interest in the field of mobile cyber-physical systems has increased due to the growing popularity of smartphones. Therefore, various implementations of the technologies described in this specification can be carried out through one or more of these technologies.

[0134] The computer programs such as the above-mentioned (single or multiple) computer programs can be written in any form of programming language including compiler-type languages or interpreter-type languages, and can be deployed in any form including the form of a stand-alone program or in the form of a module, component, subroutine, or other unit suitable for use in a computer environment or a part thereof. The computer program can be deployed to be executed on one computer or can also be deployed to be executed on one site or on multiple computers interconnected by a communication network and distributed over multiple sites.

[0135] The method steps can be executed by one or more programmable processors that execute a computer program or a portion of a computer program that functions by acting on input data to generate an output. The method steps can be executed by a dedicated logic circuit such as an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit), and the device can also be implemented as such a dedicated logic circuit.

[0136] As an example, processors suitable for the execution of a computer program include any one or more of general-purpose and special-purpose microprocessors, and any type of digital computer, chip or chip set. Generally, a processor receives instructions and data from a read-only memory or a random access memory, or both. The elements of a computer can include at least one processor for executing instructions and one or more storage devices for storing instructions and data. Generally, a computer includes one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks or optical disks, or can be operatively coupled to receive or transfer data to or from these, or both. Information carriers suitable for embodying computer program instructions and data include, as an example, semiconductor storage devices such as EPROM, EEPROM and flash memory devices, magnetic disks such as internal hard disks or removable disks, magneto-optical disks, and all forms of non-volatile memory including CD ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, dedicated logic circuitry.

[0137] To provide interaction with a user, the implementation can be performed on a computer having a display device for displaying information to the user, such as a cathode ray tube (CRT) or a liquid crystal display (LCD) monitor, a keyboard that enables the user to provide input to the computer, and a user interface such as a pointing device such as a mouse or a trackball. Other types of devices can also be used to provide interaction with the user. For example, the feedback provided to the user can be any form of sensory feedback such as visual feedback, auditory feedback or tactile feedback, and the input received from the user can be in any form including acoustic input, voice input or tactile input.

[0138] The implementation can be carried out in a computer system including, for example, a backend component as a data server, or a middleware component such as an application server, or a frontend component such as a client computer having a graphical user interface or a web browser that enables a user to interact with the implementation, or any combination of such backend, middleware or frontend components. The components can be interconnected by any form or medium of digital data communication such as a communication network. Examples of communication networks include local area networks (LANs) and wide area networks (WANs) such as the Internet.

[0139] In this specification, some features of the described embodiments have been illustrated and described, but many modifications, substitutions, changes and equivalents will occur to those skilled in the art. Accordingly, it must be understood that the appended claims are intended to cover all modifications and changes that fall within the true spirit of the various embodiments.

Claims

1. a base station determining an uplink data channel power control parameter set for an uplink data channel beam pair; the base station determining a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receive beam and a user equipment transmit beam; the base station selecting, based on the uplink data channel beam pair that matches the sounding reference signal beam pair, the uplink data channel power control parameter set to be used by the user equipment to adjust the sounding reference signal transmission power; receiving, by the base station, a sounding reference signal from the user equipment via the sounding reference signal resource and the sounding reference signal beam pair, the sounding reference signal having a sounding reference signal transmission power set based on the uplink data channel power control parameter set; The method according to claim 1, further comprising:

2. the step of determining an uplink data channel power control parameter set includes determining an uplink data channel power control parameter set for each of a plurality of uplink data channel beam pairs, including determining a first uplink data channel power control parameter set for a first uplink data channel beam pair and a second uplink data channel power control parameter set for a second uplink data channel beam pair; The step of determining a sounding reference signal beam pair of a sounding reference signal resource comprises: determining a first sounding reference signal beam pair for a first sounding reference signal resource; determining a second sounding reference signal beam pair for a second sounding reference signal resource; determining a sounding reference signal beam pair for each of a plurality of sounding reference signal resources, The selecting step includes: selecting, based on a match between the first uplink data channel beam pair and the first sounding reference signal beam pair, the first uplink data channel power control parameter set for the first uplink data channel beam pair to be used by the user equipment to adjust a sounding reference signal transmission power for the first sounding reference signal resource; selecting, based on a match between the second uplink data channel beam pair and the second sounding reference signal beam pair, a second uplink data channel power control parameter set for the second uplink data channel beam pair to be used by the user equipment to adjust a sounding reference signal transmission power for the second sounding reference signal resource; Including, The method of claim 1.

3. the uplink data channel power control parameter set for an uplink data channel beam pair includes a physical uplink shared channel (PUSCH) power control parameter set for a PUSCH beam pair; The method according to claim 1 or 2.

4. and transmitting, to the user equipment, control information identifying the uplink data channel power control parameter set to be used for adjusting the sounding reference signal transmit power, by the base station. The method according to claim 1 or 2.

5. the control information is transmitted via higher layer signaling for a periodic sounding reference signal; the control information is transmitted via lower layer signaling for an aperiodic sounding reference signal. The method according to claim 4.

6. the control information is transmitted via Radio Resource Control (RRC) signaling for a periodic sounding reference signal; The control information is transmitted via a Physical Downlink Control Channel (PDCCH) Downlink Control Information (DCI) for a non-periodic sounding reference signal. The method according to claim 4.

7. the control information includes control information provided via a physical downlink control channel (PDCCH) downlink control information (DCI) that identifies: 1) a sounding reference signal parameter set to be used for transmitting the sounding reference signal, configured by higher layer signaling; and 2) the uplink data channel power control parameter set to be used for adjusting the sounding reference signal transmit power. The method according to claim 4.

8. The method further comprises the step of the base station transmitting to the user equipment information identifying a numerology used by the user equipment for sounding reference signal transmission. The method according to any one of claims 1 to 7.

9. and transmitting, by the base station, information to the user equipment identifying a power offset of the sounding reference signal transmit power for the uplink data channel.

9. The method according to any one of claims 1 to 8.

10. The base station further comprises transmitting a channel state information-reference signal to the user equipment to enable the user equipment to determine a path loss of one or more beam pairs.

10. The method according to any one of claims 1 to 9.

11. An apparatus comprising at least one processor and at least one memory containing computer instructions, which, when executed by said at least one processor, cause said apparatus to perform a method according to any one of claims 1 to 10. An apparatus comprising:

12. Means for carrying out the method according to any one of claims 1 to 10, An apparatus comprising:

13. 11. An apparatus including a computer program product including a non-transitory computer readable storage medium and storing executable code, the executable code being configured, when executed by at least one data processing device, to cause the at least one data processing device to perform a method according to any one of claims 1 to 10.

14. receiving, by a user equipment, from a base station, an uplink data channel power control parameter set for an uplink data channel beam pair; the user equipment determining a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receive beam and a user equipment transmit beam; selecting, by the user equipment, the uplink data channel power control parameter set for adjusting a sounding reference signal transmission power; adjusting a sounding reference signal transmit power for a sounding reference signal transmitted by the user equipment via the sounding reference signal resource based on the uplink data channel power control parameter set; transmitting the power adjusted sounding reference signal by the user equipment via the sounding reference signal resource and the sounding reference signal beam pair; The method according to claim 1, further comprising:

15. The step of receiving an uplink data channel power control parameter set comprises: receiving a first set of uplink data channel power control parameters for a first uplink data channel beam pair; receiving a second set of uplink data channel power control parameters for a second uplink data channel beam pair; receiving an uplink data channel power control parameter set for each of a plurality of uplink data channel beam pairs, the uplink data channel power control parameter set including: The step of determining a sounding reference signal beam pair comprises: determining a first sounding reference signal beam pair for a first sounding reference signal resource; determining a second sounding reference signal beam pair for a second sounding reference signal resource; determining a sounding reference signal beam pair for each of a plurality of sounding reference signal resources, the selecting step includes selecting the first uplink data channel power control parameter set for adjusting a sounding reference signal transmission power of the first sounding reference signal resource and the second uplink data channel power control parameter set for adjusting a sounding reference signal transmission power of the second sounding reference signal resource. The method of claim 14.

16. The selecting step includes: the user equipment determining that the uplink data channel beam pair matches the sounding reference signal beam pair; selecting, by the user equipment, the uplink data channel power control parameter set for adjusting a sounding reference signal transmission power based on the correspondence of the uplink data channel beam pair to the sounding reference signal beam pair; 15. The method of claim 14, comprising:

17. The selecting step includes: receiving control information from the base station indicating that the user equipment should use the uplink data channel power control parameter set to adjust a sounding reference signal transmit power; selecting, by the user equipment, the uplink data channel power control parameter set for adjusting a sounding reference signal transmission power based on the received control information; 15. The method of claim 14, comprising:

18. the uplink data channel power control parameter set for an uplink data channel beam pair includes a physical uplink shared channel (PUSCH) power control parameter set for a PUSCH beam pair; 18. The method according to any one of claims 14 to 17.

19. the control information is received via higher layer signaling for a periodic sounding reference signal; the control information is received via lower layer signaling for an aperiodic sounding reference signal; 20. The method of claim 17.

20. The control information is received via Radio Resource Control (RRC) signaling for a periodic sounding reference signal; The control information is received via a Physical Downlink Control Channel (PDCCH) Downlink Control Information (DCI) for an aperiodic sounding reference signal.

20. The method of claim 17.

21. the control information includes control information provided via a physical downlink control channel (PDCCH) downlink control information (DCI) that identifies: 1) a sounding reference signal parameter set to be used for transmitting the sounding reference signal, configured by higher layer signaling; and 2) the uplink data channel power control parameter set to be used for adjusting the sounding reference signal transmit power.

20. The method of claim 17.

22. receiving, by the user equipment, information identifying a numerology that the user equipment should use for sounding reference signal transmission; receiving, by the user equipment, information identifying a power offset of the sounding reference signal transmit power for the uplink data channel; receiving, by the user equipment, a channel state information-reference signal for enabling the user equipment to determine a path loss corresponding to the sounding reference signal beam pair; determining a path loss corresponding to the sounding reference signal beam pair based on the channel state information-reference signal; Further comprising: The adjusting step includes the user equipment adjusting a sounding reference signal transmission power based on the uplink data channel power control parameter set, the numerology, the power offset and the path loss.

22. The method of any one of claims 14 to 21.

23. The method further includes receiving information by the user equipment identifying a numerology to be used by the user equipment for sounding reference signal transmission, the sounding reference signal and the uplink data channel using the same beam pair having the same numerology.

23. The method of any one of claims 14 to 22.

24. and adjusting a sounding reference signal transmission power of each of the plurality of sounding reference signal beams using one uplink data channel power control parameter set when performing beam sweeping for beam management.

24. The method according to any one of claims 14 to 23.

25. The one uplink data channel power control parameter set includes an uplink data channel power control parameter set used for transmitting uplink data to the base station via the uplink data channel.

25. The method of claim 24.

26. An apparatus comprising at least one processor and at least one memory containing computer instructions, the instructions, when executed by said at least one processor, causing said apparatus to perform a method according to any of claims 14-25.

27. Means for carrying out the method according to any one of claims 14 to 25, An apparatus comprising:

28. selecting, by the user equipment, for each of a plurality of sounding reference signal resources, an uplink data channel power control parameter set for the uplink data channel beam pair to be used for adjusting a sounding reference signal transmission power of the sounding reference signal beam pair; adjusting, by the user equipment, a sounding reference signal transmission power of a sounding reference signal for each of a plurality of sounding reference signal resources based on a selected uplink data channel power control parameter set; transmitting, by the user equipment, each of a plurality of power adjusted sounding reference signals via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair; The method according to claim 1, further comprising:

29. The selecting step includes: independently determining, for each of a plurality of sounding reference signal resources, that an uplink data channel beam pair corresponds to the sounding reference signal beam pair; the user equipment selecting, based on the uplink data channel beam pair being matched to the sounding reference signal beam pair, the uplink data channel power control parameter set for the uplink data channel beam pair to adjust a sounding reference signal transmission power of a sounding reference signal having the sounding reference signal beam pair that is matched to the uplink data channel beam pair; 30. The method of claim 28, comprising:

30. The selecting step includes: receiving, by the user equipment, control information from the base station indicating, for each of a plurality of sounding reference signal resources, a set of uplink data channel power control parameters to be used to adjust a sounding reference signal transmission power; selecting, by the user equipment, the uplink data channel power control parameter set for adjusting a sounding reference signal transmission power based on the received control information for each of the plurality of sounding reference signal resources; 30. The method of claim 28 or 29, comprising:

31. the uplink data channel power control parameter set for each uplink data channel beam pair includes a physical uplink shared channel (PUSCH) power control parameter set for the PUSCH beam pair; 31. The method of any one of claims 28 to 30.

32. An apparatus comprising at least one processor and at least one memory containing computer instructions, which, when executed by said at least one processor, cause said apparatus to perform a method according to any one of claims 28 to 31. An apparatus comprising:

33. Means for carrying out the method according to any one of claims 28 to 31, An apparatus comprising:

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