Sounding Reference Signal Power Control for MIMO Wireless Systems

Abstract

Embodiments of the present disclosure relate to sounding reference signal power control of a multiple-input multiple-output wireless system. The technology includes: independently selecting an uplink data channel power control parameter set of an uplink data channel beam pair for each sounding reference signal resource in a plurality of sounding reference signal resources by a user device, and the uplink data channel power control parameter set will be used to adjust the sounding reference signal transmission power for the sounding reference signal beam pair; adjusting the sounding reference signal transmission power for the sounding reference signal for each sounding reference signal resource based on the selected uplink data channel power control parameter set by the user device; and transmitting each of the plurality of sounding reference signals with power adjusted via the corresponding sounding reference signal resource and the corresponding sounding reference signal beam pair by the user device.

Description

[0001] This divisional application is a divisional application of Chinese Patent Application No. 201780086655.7, titled "Sounding Reference Signal Power Control for Multi-Input Multi-Output Wireless Systems", filed on January 4, 2017. Technical Field

[0002] This specification relates to communications. Background Art

[0003] A communication system can be a facility that supports communication between two or more nodes or devices (such as fixed or mobile communication devices). Signals can be carried on wired or wireless carriers.

[0004] An example of a cellular communication system is an architecture standardized by the 3rd Generation Partnership Project (3GPP). The latest developments in this field are generally 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 for 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 includes many improvements or developments.

[0005] For example, the global bandwidth shortage faced by wireless carriers has driven the consideration of the underutilized millimeter wave (mmWave) spectrum for future broadband cellular communication networks. For example, millimeter wave (mmWave) (or extremely high frequency) can include a frequency range between 30 and 300 gigahertz (GHz). Radio waves in this frequency band can have a wavelength of, for example, 10 millimeters to 1 millimeter, thus naming it the millimeter band or millimeter wave. In the next few years, the amount of wireless data is likely to increase significantly. Various technologies have been used to try to address this challenge, including obtaining more spectrum, having smaller cell sizes, and using improved technologies that support greater bits / s / Hz. One element that can be used to obtain more spectrum is to move to higher frequencies above 6 GHz. For the fifth-generation wireless system (5G), an access architecture for deploying cellular radio devices using the mmWave radio spectrum has been proposed. Other example spectrums can also be used, such as the centimeter wave (cmWave) radio spectrum (3 to 30 GHz).

[0006] MIMO (Multi-Input Multi-Output) is an antenna technology for wireless communication, where multiple antennas are used at both the source (transmitter) and the destination (receiver) in order to reduce errors and / or increase data speed. Summary of the Invention

[0007] Implementing according to the example, the method may include: determining, by a base station, a set of uplink data channel power control parameters for an uplink data channel beam pair; determining, by the base station, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; selecting, by the base station, a set of uplink data channel power control parameters, the set of uplink data channel power control parameters to be used by the user equipment to adjust the sounding reference signal transmission power, the selection being performed based on the uplink data channel beam pair matching the sounding reference signal beam pair; and 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 set of uplink data channel power control parameters.

[0008] Implementing according to the example, the apparatus includes at least one processor and at least one memory, the at least one memory including computer instructions that, when executed by the at least one processor, cause the apparatus to: determine, by a base station, a set of uplink data channel power control parameters for an uplink data channel beam pair; determine, by the base station, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; select, by the base station, a set of uplink data channel power control parameters, the set of uplink data channel power control parameters to be used by the user equipment to adjust the sounding reference signal transmission power, the selection being performed based on the uplink data channel beam pair matching the sounding reference signal beam pair; and receive, 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 set of uplink data channel power control parameters.

[0009] Implementing according to the example, the apparatus includes: means for determining, by a base station, a set of uplink data channel power control parameters for an uplink data channel beam pair; means for determining, by the base station, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; means for selecting, by the base station, a set of uplink data channel power control parameters, the set of uplink data channel power control parameters to be used by the user equipment to adjust the sounding reference signal transmission power, the selection being performed based on the uplink data channel beam pair matching the sounding reference signal beam pair; and means for 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 set of uplink data channel power control parameters.

[0010] Implementing according to an example, a computer program product includes a computer-readable storage medium and stores executable code that, when executed by at least one data processing device, is configured to cause the at least one data processing device to execute a method that includes: determining, by a base station, an uplink data channel power control parameter set for an uplink data channel beam pair; determining, by the base station, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; selecting, by the base station, an uplink data channel power control parameter set that will be used by the user equipment to adjust the sounding reference signal transmission power, the selection being performed based on the uplink data channel beam pair matching the sounding reference signal beam pair; and 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.

[0011] Implementing according to an example, the method may include: receiving, by a user equipment, an uplink data channel power control parameter set for an uplink data channel beam pair from a base station; determining, by the user equipment, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; selecting, by the user equipment, an uplink data channel power control parameter set to adjust the sounding reference signal transmission power; adjusting, by the user equipment, the sounding reference signal transmission power for the sounding reference signal based on the uplink data channel power control parameter set, the sounding reference signal being transmitted via the sounding reference signal resource; and transmitting, by the user equipment, the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0012] Implementing according to an example, a device includes at least one processor and at least one memory, the at least one memory including computer instructions that, when executed by the at least one processor, cause the device to: receive, by a user equipment, an uplink data channel power control parameter set for an uplink data channel beam pair from a base station; determine, by the user equipment, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; select, by the user equipment, an uplink data channel power control parameter set to adjust the sounding reference signal transmission power; adjust, by the user equipment, the sounding reference signal transmission power for the sounding reference signal based on the uplink data channel power control parameter set, the sounding reference signal transmission power being transmitted via the sounding reference signal resource; and transmit, by the user equipment, the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0013] Implementing according to the example, the apparatus includes: components for receiving, by a user equipment, a set of uplink data channel power control parameters for an uplink data channel beam pair from a base station; components for determining, by the user equipment, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; components for selecting, by the user equipment, a set of uplink data channel power control parameters to adjust the sounding reference signal transmission power; components for adjusting, by the user equipment and based on the set of uplink data channel power control parameters, the sounding reference signal transmission power for the sounding reference signal, the sounding reference signal to be transmitted via the sounding reference signal resource; and components for transmitting, by the user equipment, the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0014] Implementing according to the example, the computer program product includes a computer-readable storage medium and stores 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 execute a method, the method including: receiving, by a user equipment, a set of uplink data channel power control parameters for an uplink data channel beam pair from a base station; determining, by the user equipment, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam; selecting, by the user equipment, a set of uplink data channel power control parameters to adjust the sounding reference signal transmission power; adjusting, by the user equipment and based on the set of uplink data channel power control parameters, the sounding reference signal transmission power for the sounding reference signal, the sounding reference signal to be transmitted via the sounding reference signal resource; and transmitting, by the user equipment, the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0015] Implementing according to the example, the method may include: independently selecting, by a user equipment, 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, the set of uplink data channel power control parameters to be used to adjust the sounding reference signal transmission power for a sounding reference signal beam pair; adjusting, by the user equipment and based on the selected set of uplink data channel power control parameters, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power for the sounding reference signal; and transmitting, by the user equipment, 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 example implementation, the apparatus includes at least one processor and at least one memory, the at least one memory including computer instructions which, when executed by the at least one processor, cause the apparatus to: independently select, by a user equipment, 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, the set of uplink data channel power control parameters to be used to adjust the sounding reference signal transmission power for a sounding reference signal beam pair; adjust, by the user equipment, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power for the sounding reference signal based on the selected set of uplink data channel power control parameters; and transmit, 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.

[0017] According to an example implementation, the apparatus includes: means for independently selecting, by a user equipment, 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, the set of uplink data channel power control parameters to be used to adjust the sounding reference signal transmission power for a sounding reference signal beam pair; means for adjusting, by the user equipment, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power for the sounding reference signal based on the selected set of uplink data channel power control parameters; and means for 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.

[0018] According to an example implementation, a computer program product includes a computer-readable storage medium and stores executable code which, when executed by at least one data processing device, is configured to cause the at least one data processing device to perform a method, the method including: independently selecting, by a user equipment, 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, the set of uplink data channel power control parameters to be used to adjust the sounding reference signal transmission power for a sounding reference signal beam pair; adjusting, by the user equipment, for each of the plurality of sounding reference signal resources, the sounding reference signal transmission power for the sounding reference signal based on the selected set of uplink data channel power control parameters; and 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.

[0019] Details of one or more examples of the implementation are set forth in the following drawings and the description. Other features will become apparent from the description, the drawings, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a block diagram of a wireless network implemented according to an example.

[0021] Figure 2 is a flowchart illustrating the operation of a base station implemented according to an example.

[0022] Figure 3 is a flowchart illustrating the operation of a user equipment implemented according to an example.

[0023] Figure 4 is a flowchart illustrating the operation of a user equipment implemented according to another example.

[0024] Figure 5 is a diagram illustrating different beam pairs for PUSCH and SRS implemented according to an example.

[0025] Figure 6 is a diagram illustrating different beam pairs for PUSCH and SRS signals in a heterogeneous network.

[0026] Figure 7 is a diagram illustrating explicit dynamic signaling implemented according to an example.

[0027] Figure 8 is a diagram illustrating the linking (or selection) of PUSCH power control parameter sets for multiple SRS resources implemented according to an example.

[0028] Figure 9 is a diagram illustrating the operation of a base station and a user equipment (UE) implemented according to another example.

[0029] Figure 10 is a block diagram of a node or a wireless station (e.g., a base station / access point or a mobile station / user equipment) implemented according to an example. DETAILED DESCRIPTION

[0030] Figure 1 is a block diagram of a wireless network 130 implemented according to an example. In Figure 1In the wireless network 130, user devices 131, 132, 133, and 135 (which may also be referred to as mobile stations (MS) or user equipment (UE)) can be connected (or communicate) with a base station (BS) 134 (which may also be referred to as an access point (AP), evolved Node B (eNB), or network node). At least a part of the functions of an 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, including providing wireless coverage to user devices 131, 132, 133, and 135. Although only four user devices are shown as being connected or attached to the BS 134, any number of user devices can be provided. The BS 134 is also connected to the core network 150 via an S1 interface 151. This is only a simple example of a wireless network, and other wireless networks can be used.

[0031] A user equipment (user terminal, user equipment (UE)) can refer to a portable computing device that includes a wireless mobile communication device that operates with or without a subscriber identity module (SIM), including but not limited to the following types of devices: By way of example, a mobile station (MS), mobile phone, cellular phone, smart phone, personal digital assistant (PDA), earphone, a device using a wireless modem (such as an alarm or a measuring device, etc.), a laptop and / or touch screen computer, a tablet computer, a phablet, a gaming console, a notebook computer, and a multimedia device. It should be understood that the user equipment can also be an almost exclusively uplink device, an example of which is a camera or video camera that uploads images or video clips to the network.

[0032] In LTE (by way of example), the core network 150 can be referred to as an evolved packet core (EPC), which can include a mobility management entity (MME) that can handle or assist the mobility / handover of user equipment between BSs, one or more gateways that can forward data and control the signaling between the BS and a packet data network or the Internet, and other control functions or blocks.

[0033] Various example implementations can be applied to various wireless technologies or wireless networks, such as LTE, LTE-A, 5G, cmWave, and / or mmWave band networks, or any other wireless network. LTE, 5G, cmWave, and mmWave band networks are only provided as illustrative examples, and various example implementations can be applied to any wireless technology / wireless network.

[0034] As an example, implemented according to illustrative examples, various example implementations can involve, for example, a 5G radio access system (or other system) that supports massive MIMO (multiple-input multiple-output) and is optimized for operation at high carrier frequencies such as cmWave frequencies (e.g., starting from 3 GHz) or mmWave frequencies (as an example). A typical characteristic of these illustrative examples is the need for high antenna gain to compensate for increased path loss and the need for high capacity and high spectral efficiency to respond to increasing wireless traffic. According to an example implementation, for example, a large-scale (multi-element) antenna array and corresponding antenna gain can be introduced via beamforming at an access point (AP) / base station (BS) and / or user equipment to compensate for increased attenuation at higher carrier frequencies. Spectral efficiency can generally increase as the number of spatial streams that the system can support and thus as the number of antenna ports at the BS increases. According to an example implementation, spatial multiplexing can include a transmission technique in MIMO wireless communication to transmit independent and separately encoded data signals, i.e., so-called streams, from each of multiple transmit antennas.

[0035] For example, for a massive multiple-input multiple-output (M-MIMO) system, a large number of antenna elements can typically be used at a transmitter and / or receiver (e.g., at a base station / access point or other network node). M-MIMO can typically have more spatial links / layers and provide more spatial degrees of freedom. In an illustrative example, with well-designed antenna weights, an MIMO or M-MIMO transmitter can generate relatively narrow beams with good spatial separation. Thus, such a transmitter can achieve a greater beamforming gain, reduce the spatial interference range, and obtain a greater multi-user spatial multiplexing gain. Compared with other systems, MIMO or M-MIMO systems can generally have better performance in terms of data rate and link reliability.

[0036] For example, as Figure 1As shown, in order to cover a cell, multiple beams are typically used, such as, for example, Beam 1, Beam 2, Beam 3 up to N beams. However, in many cases, only a subset of the beams can be active at the same time, for example, to reduce cost and complexity. Therefore, beam scanning can be used to transmit signals over multiple time periods through each beam or beam set among multiple beams or beam sets. Beam scanning can include activating each beam or beam set over multiple time periods. Moreover, a user equipment can perform beam management (or beam tracking), where the user equipment can measure reference signals for each beam and then can send a beam report to the BS identifying one or more preferred beams (e.g., identifying one or more preferred or best downlink transmission beams, e.g., which can be the beam with the highest received power or received signal strength or other channel quality measurement). Thus, beam scanning can be performed, for example, to generate or activate each beam set among multiple beam sets in the time domain in order to transmit signals across the campus or receive signals via different beams. For example, only one beam can be active at a time, or only one beam set (e.g., 3 beams, 4 beams, 6 beams or some other number of beams) can be active, depending on the implementation. For example, various control signals such as reference signals (RS) can be transmitted or received by the user equipment or the BS typically for only one beam at a time or for only one beam set at a time.

[0037] Transmissions between the user equipment and the BS can communicate via a beam pair, which can include a beam applied by the BS and a beam applied by the user equipment. For example, for an uplink transmission from the user equipment to the BS, the beam pair can include a transmission beam applied by the user equipment and a receiving beam applied by the BS. Similarly, for a downlink transmission, a beam pair including a transmission beam applied by the BS and a receiving beam applied by the user equipment can be used.

[0038] According to an example implementation, one or more user equipments may transmit uplink data to a BS via an uplink data channel (such as, for example, via a Physical Uplink Shared Channel (PUSCH) channel). According to an example implementation, a set of uplink data channel (such as, for example, PUSCH) power control parameters may be used by a user equipment to perform power control, for example, to adjust the transmit power of data (or other signals) transmitted by the user equipment via the uplink data channel (such as, for example, via the PUSCH channel). Different (or beam-specific) sets of uplink data channel (such as, for example, PUSCH) power control parameters may be selected or determined for each of a plurality of beam pairs (for example, different sets of power control parameters for each of a plurality of uplink data channel beam pairs or PUSCH beam pairs). For example, each different set of uplink data channel (or PUSCH) power control parameters may include at least one parameter that is a value different from (one or more or all) other uplink data channel power control parameter sets.

[0039] Thus, for example, different (or beam-specific) sets of PUSCH power control parameters may be determined or obtained for each of a plurality of PUSCH beam pairs, for example, to allow a user equipment to adjust the transmit power for transmitting data via a PUSCH channel through a corresponding beam pair. As mentioned, for an uplink transmission (from a user equipment to a BS), a beam pair may include a transmission beam for the user equipment (or applied by it) and a reception beam for the BS (or applied by it). For example, a set of PUSCH power control parameters for a beam pair (or for each of a plurality of beam pairs) may be used by a user equipment to perform power control, for example, to adjust the transmission (or transmit) power of uplink data transmitted via PUSCH (or an uplink data channel) in an uplink transmission. Generally, for example, power control for signal transmission may be used to avoid unnecessary interference and reduce power consumption.

[0040] According to an example implementation, a user equipment may transmit a (uplink) sounding reference signal (SRS) to a BS. For example, a user equipment may transmit a sounding reference signal (SRS) to a BS to allow the BS to estimate the uplink channel state at different frequencies. According to an example implementation, for example, a BS scheduler may use the channel state estimate to assign resource blocks with good channel quality for uplink PUSCH transmission (such as, for example, uplink channel-related scheduling) and select different transmission parameters (such as, for example, data rate and different parameters related to uplink multi-antenna transmission). For example, an SRS signal may include a periodic SRS signal that may be transmitted at regular intervals or for a specific time period and an aperiodic SRS signal that is not periodic (such as, for example, not transmitted at regular intervals).

[0041] According to an example implementation, SRS signals can be transmitted via multiple different time-frequency resources. Due to time-varying and / or frequency-varying channel conditions, different beam pairs can be determined for each SRS resource. Thus, for example, each SRS signal transmitted via a different SRS resource can have a different beam pair or be transmitted via a different beam pair (e.g., including an uplink beam for a user equipment and a receive-link beam for a BS). Thus, in this regard, different beam pairs can exist for each SRS resource.

[0042] Additionally, power control can also be applied to each SRS signal. For example, the transmit power for each SRS signal can be adjusted. According to an example implementation, a user equipment can independently determine a set of PUSCH channel power control parameters for each SRS resource among multiple SRS resources, and this set of PUSCH channel power control parameters will be used to adjust the power for the transmission of the SRS signal. Thus, for example, a set of PUSCH power control parameters selected by the user equipment to adjust the sounding reference signal transmit power can be selected for each SRS resource (or for each SRS signal). For example, the set of PUSCH power control parameters selected for power control of the SRS signal can be referred to as a linked PUSCH power control parameter set, for example, because this set of PUSCH power control parameters provides a link or relationship between the PUSCH transmission power and the SRS signal transmission power. Since separate or independent beam pairs can be provided for each different SRS resource (for SRS signals transmitted via different SRS resources), different and / or independent sets of PUSCH power control parameters can be selected or determined for power control for each SRS resource / SRS signal.

[0043] According to an example implementation, in a case where there is a match between a PUSCH beam pair and an SRS beam pair, a linked PUSCH power control parameter set for the PUSCH beam pair can be selected to perform power control for the SRS signal / SRS signal resource. Thus, for example, the beam pair of the SRS signal or SRS resource can be matched with the PUSCH beam pair (e.g., having the same transmission beam and receive beam). Then, the set of PUSCH power control parameters for the matched PUSCH beam pair can be selected as the linked PUSCH power control parameter set for the user equipment to use to adjust the SRS signal transmit power of the SRS resource.

[0044] According to an example implementation, a user equipment may use different techniques to select or determine a set of link PUSCH power control parameters for SRS resources. For example, the user equipment may implicitly determine (e.g., based on a matching beam pair between a PUSCH beam pair and an SRS beam pair) the set of link PUSCH power control parameters for (or for each of) the SRS resources by: 1) determining that a PUSCH (or uplink data channel) beam pair matches the SRS beam pair, and then 2) selecting the set of PUSCH power control parameters for the PUSCH (or uplink data channel) beam pair to adjust the SRS transmission power of the SRS signal (of the SRS resource) having the SRS beam pair that matches the PUSCH beam pair. Alternatively, the user equipment may explicitly determine (e.g., based on control information received from the BS) the set of link PUSCH (or uplink data channel) power control parameters by: 1) receiving control information from the BS that indicates, for each of a plurality of SRS resources, the set of PUSCH power control parameters that will be used to adjust the SRS transmission power, and 2) based on the received control information for each of the plurality of SRS resources, selecting the set of link PUSCH power control parameters that will be used for power control of each of the plurality of SRS signals or SRS resources.

[0045] According to an example implementation, control information from the BS indicating the set of link PUSCH power control parameters for each of a plurality of SRS signals / SRS resources may be transmitted via a higher layer signal for periodic SRS signals (e.g., via radio resource control (RRC) signaling), and may be transmitted to the user equipment via a lower layer signaling for aperiodic SRS signals (e.g., via physical downlink control channel (PDCCH) downlink control information (DCI)).

[0046] Additionally, the user equipment can receive from the BS information identifying the numerology to be used for SRS transmission (e.g., to be used for SRS signal power control). For example, for different numerologies, there may be different sets of link PUSCH power control parameters. Also, the set of PUSCH power control parameters for the PUSCH beam pair and the set of link PUSCH power control parameters for the SRS resource / SRS beam pair can have the same numerology. For example, the numerology can include different quantity, length, or interval information for one or more transmission or conveyance characteristics. Thus, for example, as an illustrative example, the numerology can include subcarrier spacing, subframe (or time slot) length, OFDM symbol time period, or other time / frequency characteristics. Thus, for example, at least in some cases, since 5G BS or user equipment can also be backward compatible with LTE / 4G or other standards, 5G / network equipment can support different numerologies (e.g., 5G numerology and 4G numerology).

[0047] Additionally, the user equipment can receive a channel state information reference signal (CSI-RS), and the user equipment can measure or determine the path loss, e.g., determine the path loss for each of the plurality of beam pairs. The user equipment can also receive from the BS an indication of the SRS power offset that can be used to set or adjust the SRS transmission power (e.g., with respect to the PUSCH signal transmission power). Thus, in an example implementation, the user equipment can adjust or set (or each of) the transmission power for the SRS signal based on, for example, the set of link PUSCH power control parameters for the SRS signal / SRS resource, the numerology for the SRS signal / SRS resource, the power offset (e.g., SRS power offset), and the path loss (e.g., the path loss for or corresponding to the SRS beam pair).

[0048] Moreover, as mentioned above, the user equipment may perform beam scanning for beam management (e.g., where the user equipment receives and measures signals of different beams / beam pairs and may select or report to the BS one or more preferred or best beam pairs or the best / preferred downlink transmission beam), e.g., in order to report updated preferred (or best) beam information to the BS. When setting the SRS transmission power for beam scanning for beam management, the user equipment may select / use one set of linked PUSCH power control parameters for all (or multiple) SRS beam pairs (instead of using different or beam-specific PUSCH power control parameter sets). For example, during beam scanning for beam management, the user equipment may select / use the PUSCH power control parameter set that was most recently used for data transmission via the PUSCH channel as the set of linked PUSCH power control parameters for all (or at least multiple) SRS signals / SRS resources. This is because, during beam management for example, the user equipment may not know the (multiple) best or preferred beam pairs for different resources. According to another example, the user equipment may select the set of linked PUSCH power control parameters that has been signaled or indicated to the user equipment by a BS signal.

[0049] Example 1: Figure 2 is a flowchart illustrating the operation of a base station implemented according to an example. Operation 210 includes: determining, by the base station, a set of uplink data channel power control parameters for an uplink data channel beam pair. Operation 220 includes: determining, by the base station, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station reception beam and a user equipment transmission beam. Operation 230 includes: selecting, by the base station, the set of uplink data channel power control parameters that will be used by the user equipment to adjust the sounding reference signal transmission power, the selection being performed based on the uplink data channel beam pair matching the sounding reference signal beam pair. And, operation 240 includes: receiving, by the base station, 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 set of uplink data channel power control parameters.

[0050] Example 2: According to the example implementation of Example 1, determining the uplink data channel power control parameter set includes: determining the uplink data channel power control parameter set for each of the multiple uplink data channel beam pairs, including determining the first uplink data channel power control parameter set for the first uplink data channel beam pair and the second uplink data channel power control parameter set for the second uplink data channel beam pair; determining the sounding reference signal beam pair for the sounding reference signal resource includes determining the sounding reference signal beam pair for each of the multiple sounding reference signal resources, including: determining the first sounding reference signal beam pair for the first sounding reference signal resource; and determining the second sounding reference signal beam pair for the second sounding reference signal resource; and the selection includes: based on the match between the first uplink data channel beam pair and the first sounding reference signal beam pair, selecting the first uplink data channel power control parameter set for the first uplink data channel beam pair, and the first uplink data channel power control parameter set will be used by the user equipment to adjust the sounding reference signal transmission power for the first sounding reference signal resource; and based on the match between the second uplink data channel beam pair and the second sounding reference signal beam pair, selecting the second uplink data channel power control parameter set for the second uplink data channel beam pair, and the second uplink data channel power control parameter set will be used by the user equipment to adjust the sounding reference signal transmission power for the second sounding reference signal resource.

[0051] Example 3: According to the example implementation of any one of Examples 1 to 2, the uplink data channel power control parameter set for the uplink data channel beam pair includes: the PUSCH power control parameter set for the physical uplink shared channel (PUSCH) beam pair.

[0052] Example 4: According to the example implementation of any one of Examples 1 to 3, the method further includes: sending control information from the base station to the user equipment, and the control information identifies the uplink data channel power control parameter set that will be used to adjust the sounding reference signal transmission power.

[0053] Example 5: According to the example implementation of any one of Examples 1 to 4, the control information is sent via higher layer signaling for periodic sounding reference signals; and the control information is sent via lower layer signaling for aperiodic sounding reference signals.

[0054] Example 6: In the example implementation according to any one of Examples 1 to 5, control information is sent via radio resource control (RRC) signaling for periodic sounding reference signals; and control information is sent via physical downlink control channel (PDCCH) downlink control information (DCI) for aperiodic sounding reference signals.

[0055] Example 7: In the example implementation according to any one of Examples 1 to 6, control information includes control information provided via physical downlink control channel (PDCCH) downlink control information (DCI), and the control information identifies: 1) a sounding reference signal parameter set configured by higher layer signaling and to be used for transmitting sounding reference signals, and 2) an uplink data channel power control parameter set to be used for adjusting the transmission power of sounding reference signals.

[0056] Example 8: In the example implementation according to any one of Examples 1 to 3, the method further includes: sending, by a base station to a user equipment, information that identifies a digital basic configuration to be used by the user equipment for sounding reference signal transmission.

[0057] Example 9: In the example implementation according to any one of Examples 1 to 8, and further includes: sending, by a base station to a user equipment, information that identifies a power offset for the transmission power of sounding reference signals for an uplink data channel.

[0058] Example 10: In the example implementation according to any one of Examples 1 to 9, and further includes: sending, by a base station to a user equipment, a channel state information reference signal to allow the user equipment to determine path loss for one or more beam pairs.

[0059] Example 11: In the example implementation, the apparatus includes at least one processor and at least one memory, the at least one memory includes computer instructions, and when executed by the at least one processor, the computer instructions cause the apparatus to perform the method according to any one of Examples 1 to 10.

[0060] Example 12: The apparatus includes components for performing the method according to any one of Examples 1 to 10.

[0061] Example 13: The apparatus includes a computer program product, the computer program product includes a non-transitory computer-readable storage medium and stores executable code, and when executed by at least one data processing device, the executable code is configured to cause the at least one data processing device to perform the method according to any one of Examples 1 to 10.

[0062] Example 14: Figure 3is a flowchart illustrating operations of a user equipment according to an example implementation. Operation 310 includes: receiving, by the user equipment, a set of uplink data channel power control parameters for an uplink data channel beam pair from a base station. Operation 320 includes: determining, by the user equipment, a sounding reference signal beam pair for a sounding reference signal resource, the sounding reference signal beam pair including a base station receiving beam and a user equipment transmitting beam. Operation 330 includes: selecting, by the user equipment, a set of uplink data channel power control parameters to adjust a sounding reference signal transmission power. Operation 340 includes: adjusting, by the user equipment, based on the set of uplink data channel power control parameters, a sounding reference signal transmission power for the sounding reference signal that is to be transmitted via the sounding reference signal resource. And operation 350 includes: transmitting, by the user equipment, the power-adjusted sounding reference signal via the sounding reference signal resource and the sounding reference signal beam pair.

[0063] Example 15: According to the example implementation of Example 14, receiving the set of uplink data channel power control parameters includes: receiving a set of uplink data channel power control parameters for each uplink data channel beam pair among a plurality of uplink data channel beam pairs, including: receiving a first set of uplink data channel power control parameters for a first uplink data channel beam pair; and receiving a second set of uplink data channel power control parameters for a second uplink data channel beam pair; determining the sounding reference signal beam pair includes: determining a sounding reference signal beam pair for each sounding reference signal resource among a plurality of sounding reference signal resources, including: determining a first sounding reference signal beam pair for a first sounding reference signal resource; and determining a second sounding reference signal beam pair for a second sounding reference signal resource; wherein the selection includes selecting the first set of uplink data channel power control parameters to adjust the sounding reference signal transmission power of the first sounding reference signal resource, and selecting the second set of uplink data channel power control parameters to adjust the sounding reference signal transmission power of the second sounding reference signal resource.

[0064] Example 16: According to the example implementation of any one of Examples 14 to 15, the selection includes: determining, by the user equipment, that the uplink data channel beam pair matches the sounding reference signal beam pair; and selecting, by the user equipment, based on the uplink data channel beam pair matching the sounding reference signal beam pair, a set of uplink data channel power control parameters to adjust the sounding reference signal transmission power.

[0065] Example 17: In the example implementation according to any one of Examples 14 to 16, the selection includes: receiving, by a user equipment, control information from a base station, the control information indicating that a set of uplink data channel power control parameters should be used to adjust the sounding reference signal transmission power; and selecting, by the user equipment, a set of uplink data channel power control parameters based on the received control information to adjust the sounding reference signal transmission power.

[0066] Example 18: In the example implementation according to any one of Examples 14 to 17, the set of uplink data channel power control parameters for an uplink data channel beam pair includes: a set of PUSCH power control parameters for a physical uplink shared channel (PUSCH) beam pair.

[0067] Example 19: In the example implementation according to any one of Examples 14 to 18, the control information is received via higher layer signaling for periodic sounding reference signals; and the control information is received via lower layer signaling for aperiodic sounding reference signals.

[0068] Example 20: In the example implementation according to any one 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.

[0069] Example 21: In the example implementation according to any one of Examples 14 to 20, the control information includes control information provided via physical downlink control channel (PDCCH) downlink control information (DCI), the control information identifying: 1) a set of sounding reference signal parameters configured by higher layer signaling and to be used for transmitting sounding reference signals, and 2) a set of uplink data channel power control parameters to be used for adjusting the sounding reference signal transmission power.

[0070] Example 22: In the example implementation according to any one of Examples 14 to 21, and further including: receiving, by a user equipment, information that identifies a digital basic configuration to be used by the user equipment for sounding reference signal transmission; receiving, by the user equipment, information that identifies a power offset with respect to the sounding reference signal transmission power of the uplink data channel; and receiving, by the user equipment, a channel state information reference signal to allow the user equipment to determine a path loss corresponding to a sounding reference signal beam pair; determining, based on the channel state information reference signal, a path loss corresponding to the sounding reference signal beam pair; and wherein the adjustment includes adjusting, by the user equipment, the sounding reference signal transmission power based on the set of uplink data channel power control parameters, the digital basic configuration, the power offset, and the path loss.

[0071] Example 23: Implement according to the example of any one of Examples 14 to 22, and further include: receiving, by a user equipment, information that identifies a digital basic configuration to be used by the user equipment for sounding reference signal transmission, wherein the sounding reference signal and the uplink data channel using the same beam pair have the same digital basic configuration.

[0072] Example 24: Implement according to the example of any one of Examples 14 to 23, and further include: when performing beam scanning for beam management, using one set of uplink data channel power control parameters to adjust the sounding reference signal transmission power for each of a plurality of sounding reference signal beams.

[0073] Example 25: Implement according to the example of any one of Examples 14 to 24, and one set of uplink data channel power control parameters includes a set of uplink data channel power control parameters used to transmit uplink data to a base station via an uplink data channel.

[0074] Example 26: An apparatus includes at least one processor and at least one memory, the at least one memory including computer instructions that, when executed by the at least one processor, cause the apparatus to perform the method according to any one of Examples 14 to 25.

[0075] Example 27: An apparatus includes components for performing the method according to any one of Examples 14 to 25.

[0076] Example 28. Figure 4 is a flowchart illustrating the operation of a user equipment according to another example implementation. Operation 410 includes: independently selecting, by the user equipment, for each of a plurality of sounding reference signal resources, a set of uplink data channel power control parameters of an uplink data channel beam pair for sounding reference signal transmission power, the set of uplink data channel power control parameters to be used to adjust the sounding reference signal transmission power for the sounding reference signal beam pair. Operation 420 includes: adjusting, by the user equipment, the sounding reference signal transmission power for the sounding reference signal for each of a plurality of sounding reference signal resources based on the selected set of uplink data channel power control parameters. Operation 430 includes: transmitting, by the user equipment, each of a plurality of power-adjusted sounding references via a corresponding sounding reference signal resource and a corresponding sounding reference signal beam pair.

[0077] Example 29: Based on the example of Example 28, the selection includes: independently determining, for each sounding reference signal resource among a plurality of sounding reference signal resources, that an uplink data channel beam pair matches a sounding reference signal beam pair; and, by a user equipment, 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 transmission power of the sounding reference signal that has a sounding reference signal beam pair matching the uplink data channel beam pair.

[0078] Example 30: Based on the implementation of any one of Examples 28 to 29, the selection includes: receiving, by a user equipment from a base station, control information that indicates, for each sounding reference signal resource among a plurality of sounding reference signal resources, an uplink data channel power control parameter set to be used to adjust the transmission power of the sounding reference signal; and, by the user equipment, based on the received control information, selecting, for each sounding reference signal resource among the plurality of sounding reference signal resources, an uplink data channel power control parameter set to adjust the transmission power of the sounding reference signal.

[0079] Example 31: Based on the implementation of any one of Examples 28 to 30, the uplink data channel power control parameter set for each uplink data channel beam pair includes: a PUSCH power control parameter set for a physical uplink shared channel (PUSCH) beam pair.

[0080] Example 32: The apparatus includes at least one processor and at least one memory, the at least one memory including computer instructions that, when executed by the at least one processor, cause the apparatus to perform the method described in any one of Examples 28 to 31.

[0081] Example 33: The apparatus includes components for performing the method described in any one of Examples 28 to 31.

[0082] Various example implementations are related to (e.g., 5G) wireless systems that support massive MIMO (m-MIMO). These systems are characterized by having a larger number of antennas, finer beamforming, and higher antenna gain. Specifically, it relates to an enhanced SRS (sounding reference signal) power control scheme based on flexible beam switching on both the transmit and / or receive sides. By using an improved or more precise SRS power control mechanism, the SRS capacity can be increased due to less interference from neighboring cells. Moreover, the power consumption of the UE can be reduced.

[0083] In an example implementation, the power control for SRS signals and the power control for PUSCH signals are typically linked by an offset value. Specifically, the SRS power control can be specified as or at least based on the following equation:

[0084] P SRS,c (i) = min{P CMAX,c (i), P SRS_OFFSET,c (m) + 10 log 10 (M SRS,c ) + P O_PUSCH,c (j) + α c (j) · PL c + f c (i)}

[0085] [dBm], where P CMAX,c (i) is the configured maximum allowable transmit power for a specific cell c; M SRS,c (i) is the number of uplink PRBs (physical resource blocks) for SRS transmission; P O_PUSCH,c (j) (for each UE) is the semi-static nominal power for PUSCH; PL c is the estimated downlink path loss in dB for the UE in serving cell c (each beam can have a specific path loss); α c (j) is the cell-specific path loss compensation factor to achieve a balance between cell-average and cell-edge throughput; f c (i) is the PUSCH closed-loop power adjustment part for serving cell c; P SRS_OFFSET,c (m) is the offset value of the power adjustment relative to the PUSCH power control, which is semi-statically configured by a higher layer (e.g., by RRC signaling). Two independent offset values can be used for periodic and aperiodic SRS.

[0086] By way of illustrative example, a PUSCH power control parameter set that can include one or more parameters that can be used to determine the transmit power of a PUSCH signal can include one or more, or even all, of the parameters (and can include additional parameters), including: M SRS,c (i), PL c , α c (j) and / or f c (i). As described in more detail herein, the PUSCH power control parameter set can be selected to be linked for use in adjusting the sounding reference signal transmit power for each SRS signal / SRS resource in one or more SRS signals / SRS resources, e.g., based on the beam pair used by the PUSCH signal and the SRS signal / SRS resource.

[0087] There can be multiple (or a plurality of) PUSCH power control parameter sets, which have PUSCH power control parameter sets for each PUSCH beam pair, and linked PUSCH power control parameter sets for SRS beam pairs. This can allow or provide independent relationships between SRS power and PUSCH power for different beam pairs. There can be different scenarios for the power control parameter sets, where one or more parameters can be different and / or one or more parameters can be common among all or a plurality of the power control parameter sets. The following are several illustrative example scenarios.

[0088] Scenario 1: The PUSCH power control parameter set includes: independent path loss; and other parameters (P0_PUSCH, alpha) can be common for all parameter sets or beam pairs; and, there can be a process to determine fc for all parameter sets / beam pairs; and, the power offset value can be the same or different for different parameter sets.

[0089] Scenario 2: The parameter set includes: p0, alpha, path loss, fc, and offset, where all parameters are independent for different beam pairs / parameter sets, and each parameter set can be used for or associated with one beam pair; thus, Scenario 2 involves the most general case where each parameter set includes independent parameters for all parameters in the parameter.

[0090] Scenario 3: The parameter set can include independent path loss and fc; and P0_PUSCH and alpha are common for all parameter sets; and the power offset value can be the same or different for different parameter sets. Considering the flexible uplink / downlink beams for SRS transmission, various example implementations are described for an enhanced SRS power control scheme.

[0091] According to an example implementation, for example, the transmission and / or reception beams can vary flexibly according to network requirements and channel transmission conditions. For example, for a UE, the beam pair (transmission beam and / or reception beam) for PUSCH and the beam pair for SRS can be different (e.g., can be different in a heterogeneous network). Thus, for example, the beam pair for SRS may be different from the beam (beam pair) of the most recent uplink transmission for PUSCH (uplink data channel). In contrast, according to an example implementation, the beam pairs for PUSCH and SRS can vary independently.

[0092] Figure 5 is a diagram illustrating different beam pairs for PUSCH and SRS according to an example implementation. Scenario 1: When multiple UEs are multiplexed for transmission, their requirements for the reception beam may not be aligned. For some UEs, a sub-optimal gNB (5G BS) reception beam can be selected to ensure (or provide) multiplexing with other UEs. AsFigure 5 In an example as shown, UE1 may need to change the PUSCH transmission beam from beam 1 to beam 2 to multiplex with UE2 in a subframe (or accommodate UE2 in a subframe), even though the link using beam 1 has better channel quality. If SRS is triggered to obtain the CSI (Channel State Information) of the link using beam 2, the beam used for SRS transmission will be different from the beam used for the previous PUSCH transmission, e.g., beam 1 (e.g., because the BS can only use 1 RX / receiving beam at a time).

[0093] Figure 6 is a diagram illustrating different beam pairs for PUSCH and SRS signals in a heterogeneous network. Scenario 2: As Figure 6 shown, when the gNB (5G BS) finds that the link quality of beam 1 is not very good, the gNB may seek or want to obtain the CSI of other beams. In this case, the gNB / BS can then trigger the SRS transmission using the desired beam, which can be different from the beam used by the most recent PUSCH transmission. In this example, different transmission powers (e.g., including different transmit / receive points, different BSs) that can be used in a heterogeneous network can cause different transmit powers and thus different beams for PUSCH and SRS. The transmission beam and / or receive beam for PUSCH and SRS can be different in a heterogeneous network (multiple transmission points, e.g., for each UE). For example, SRS can be used to obtain the downlink CSI by leveraging channel reciprocity. Since the transmit power can be different for different transmission points, the beams for the downlink and uplink can be different. As Figure 6 shown, SRS is used to obtain the downlink CSI and is linked to the downlink beam, which is different from the uplink beam used for PUSCH. Thus, for example, a higher transmit power DL (downlink); SRS must be TX (transmitted) using the same beam as the DL data; for example, the SRS signal can be used by the BS to obtain the DLCSI based on channel reciprocity. Thus, for example, different beam pairs (or at least independent beam pairs) may be used or required for PUSCH and SRS.

[0094] Impact of multiple SRS resources

[0095] According to the example implementation, multiple SRS resources (K>1) (multiple time-frequency SRS resources for transmitting SRS signals) can be configured for one UE according to the UE capabilities. Different SRS resources can be used to implement different functions, such as obtaining uplink and downlink CSI, uplink beam management (how to select and report uplink and downlink beam pairs). For example, considering multiple functions and requirements, beamforming (beam pairs) or precoding on different SRS resources can be different. Different precodings can be used for precoding SRS for uplink CSI, which 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 scans can be used for beam management - applying the signal to a set of beams and scanning through each beam or beam set. Thus, the beamforming gain (meaning different beams) can be different on different SRS resources. Therefore, for example, according to the example implementation, a flexible link can be provided between the PUSCH power control parameter sets for PUSCH power control and SRS power control. For example, where, for example, based on the matching 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.

[0096] According to the example implementation, a more accurate SRS power control scheme is provided or described, which is particularly advantageous, for example, for operating in the case of flexible beamforming for m-MIMO systems. According to the example implementation, it can be used to determine the link between the power control parameter sets for PUSCH and SRS through explicit signaling (control information from the BS to indicate the linked PUSCH power control parameter set for the SRS signal / SRS resource) or implicit determination by the UE / user equipment for the SRS signal. In this way, the change in the beamforming gain (different beam pairs) for SRS (for use in adjusting the SRS transmit power) can be compensated by an appropriately selected linked PUSCH power control parameter set. When multiple SRS resources are configured, the flexible beamforming on different SRS resources can be considered and the link between the power control parameter sets for PUSCH and SRS can be determined for each SRS resource. For beam management SRS, one PUSCH power control parameter set can be used for the link of all or multiple SRS signals / SRS resources. For example, the most recent PUSCH power control parameter set or the default PUSCH power control parameter set can be used for SRS power control, for example, due to limited information for all scanned beams.

[0097] Link to the power control parameter set between SRS and PUSCH. According to an example implementation, different parameter sets can be used by the UE for SRS power control, and the BS can indicate (signal to the UE) which power control parameter set will be used for SRS power control. Each parameter can have different values for one or more parameters in the power control parameter set, such as, P0, (alpha), path loss, and / or closed-loop related parameters, fc, etc.

[0098] Thus, for example, to support flexible beamforming for data transmission, different PUSCH power control parameter sets are used for PUSCH with different beam pairs - this can be used to adjust the power of the PUSCH signal, e.g., different parameter sets for each PUSCH beam pair. (UL TX / transmission beam for the UE and UL RX / reception beam for the BS). One scenario: Each beam pair may require a different parameter set. PUSCH A links the PUSCH power control parameter set to define the link (or relationship) between SRS power and PUSCH power. For multiple PUSCH power control parameter sets, at least one parameter in the PUSCH power control parameters can be different, which can include open-loop related parameters, P0, (alpha), path loss, and / or closed-loop related parameters, fc, etc.

[0099] According to an example implementation, a PUSCH power control parameter set (one parameter set among multiple PUSCH power control parameter sets) can be selected for SRS power control, e.g., for each SRS resource or for one or more SRS resources. Selecting the PUSCH power control parameter set for SRS (which is the linked PUSCH power control parameter set) can include or can involve one or more of the following:

[0100] 1) Determine multiple PUSCH parameter sets for PUSCH power control, with one parameter set for each PUSCH beam pair

[0101] 2) Determine the beam pair for each SRS resource (or for one or more SRS resources)

[0102] 3) For each SRS resource, determine the linked PUSCH power control parameter set, which will be used (for SRS power control) to determine the power of the SRS signal based on the beam pair for PUSCH and the beam pair matching for SRS. For example, for a given SRS beam pair, select the PUSCH parameter set with a beam pair that matches the SRS beam pair.

[0103] 4) Explicit option: The BS then sends to the UE an index identifying the PUSCH power control parameter set that will be used (for the SRS beam pair).

[0104] A) For example, 2 bits can indicate an index for a PUSCH power control parameter set - explicit dynamic signaling (e.g., using DCI in PDCC to signal the index).

[0105] B) See Table 1 - combined higher layer (e.g., RRC) signaling plus dynamic signaling: Report the SRS parameter set via a higher layer (e.g., RRC signaling), and lower layer signaling, e.g., PDCCH DCI, can be used to report the linked PUSCH power control parameter set.

[0106] C) Higher layer signaling may be, for example, slower RRC to indicate the index (not as fast as PDCCH DCI), and can be used to report the linked PUSCH power control parameter set for periodic SRS. Since the periodic SRS beam is pre - configured by the BS, the BS can send the linked PUSCH power control parameter set to be used for the beam to the UE before SRS transmission. PDCCH can be used to report the linked PUSCH power control parameter set for aperiodic SRS.

[0107] 5) Implicit option: Beam pairs can be included in the PUSCH parameter set and the SRS parameter set. Thus, when the BS (and UE) knows the beam and the PUSCH parameter set for PUSCH transmission, the BS now also knows the linked PUSCH parameter set for SRS using the same beam pair. Thus, both the UE and the BS know the beam pair for PUSCH and SRS (e.g., based on the matching of the beam pairs for SRS and PUSCH), and both the UE and the BS know the linked PUSCH power control parameter set for SRS power control. Thus, the UE can implicitly determine the linked PUSCH power control parameter set for SRS with the same beam pair. Thus, in this case, it may not be necessary to signal the index of the linked PUSCH power control parameter set for each SRS / SRS resource.

[0108] Figure 7 is a diagram illustrating explicit dynamic signaling according to an example implementation. Explicit dynamic signaling for the link indication. For example, to ensure sufficient flexible beamforming for both SRS and PUSCH, dynamic signaling can be used to indicate the linked PUSCH parameter set for determining the SRS transmit power (which can include P0, alpha, path loss, etc.). Figure 7Illustrates an example of dynamic signaling. According to beam pair 1 used for the SRS transmission link, the dynamic signaling indicates to the UE a set of link PUSCH power control parameters 1 that will be used for SRS power control. For each set of power control parameters, there may be a specific offset value between the SRS and the link PUSCH. Considering sufficient flexibility, this scheme can be used for the power control of aperiodic SRS. In Figure 7 In the example shown, for example, based on the matching 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 can be used to signal to the UE to use the set of PUSCH power control parameters 1 corresponding to the PUSCH transmission beam 1 and reception beam 1.

[0109] To trigger an aperiodic SRS transmission, dynamic signaling can be used, for example, via PDCCH DCI. To provide a good trade-off between signaling overhead and the flexibility of SRS transmission, higher layer signaling (e.g., RRC / radio resource control signaling) can be used in combination with lower layer (e.g., PDCCH DCI) dynamic signaling. For example, the dynamic signaling can indicate a set of SRS transmission parameters corresponding to a state. For example, 2-bit dynamic signaling can be used (e.g., see Table 1) to indicate 3 states (the fourth state is not triggered). For each state, the SRS transmission parameters are configured (sent to the UE) by higher layer (e.g., RRC) signaling. For example, the SRS transmission parameters sent to the UE via higher layer signaling may include, for example, transmission comb, start physical resource block assignment, srs-ConfigIndex, SRS bandwidth, hopping bandwidth, cyclic shift, number of antenna ports. As shown in Table 1, according to the example implementation, the index or value of the SRS request field can be used to indicate to the UE: 1) a set of SRS transmission parameters, 2) a set of link PUSCH power control parameters, and 3) the digital basic configuration for the SRS resource. For example, the SRS and the link PUSCH with the same set of power control parameters usually have the same digital basic configuration.

[0110]

[0111] Table 1 - SRS request field / index identifying the set of link PUSCH power control parameters for the SRS signal (e.g., for dynamic explicit signaling, such as for aperiodic SRS). The index or SRS request field can also indicate a set of SRS transmission parameters, digital basic configuration, etc.

[0112] If the transmit and receive beam pairs are pre-defined for SRS transmission, higher layer signaling can be used to indicate the index of the set of PUSCH power control parameters for the link. For example, periodic SRS can be used to obtain CSI for different beam pairs, which is determined by beam management. Based on the beam pairs used for PUSCH and SRS, the gNB can determine the index of the set of PUSCH power control parameters for the link through the same beam pair.

[0113] For example, when the receive beamforming information is not available at the UE side, the signaling (indicating the link) may need to indicate the set of PUSCH power control parameters for the SRS signal. Also, for example, when all beam pair information is included in the PUSCH and SRS transmission parameters, the set of PUSCH power control parameters used to determine the SRS transmit power can be implicitly determined by the UE based on the principle of the same beam pair between PUSCH and SRS.

[0114] Power control for multiple SRS resources. Since different beamforming (different beam pairs) can be used for different SRSs, the link with the set of PUSCH power control parameters for different SRS resources can be specified (or should be specified). To perform accurate power control for SRS, the link can be determined according to the beam pairs used for each SRS resource. Thus, each SRS resource can determine the link of the set of PUSCH power control parameters for SRS power control (for the SRS signal). For each resource, the link can be obtained, for example, through explicit signaling (control information sent by the BS to indicate the set of PUSCH power control parameters for the link of each SRS resource / SRS signal) or through implicit determination (e.g., based on the SRS beam pair matching the PUSCH beam pair). If different digital basic configurations are used on different SRS resources, it can be assumed in this SRS resource configuration manner that the same digital basic configuration is used for the SRS and the linked PUSCH with the same set of power control parameters. For example, when SRS is transmitted on multiple resources with different frequency bands in one OFDM (Orthogonal Frequency Division Multiplexing) symbol, if SC-FDMA (Single Carrier Frequency Division Multiple Access) is used for power-constrained user equipment, the same link (the same set of PUSCH power control parameters for each SRS) can be assumed considering to ensure good PAPR (Peak-to-Average Power Ratio) properties. This means that, for example, a UE with SC-FDMA can receive the same signaling for the link of the set of PUSCH power control parameters in different SRS resources.

[0115] Figure 8FIG. is a diagram illustrating a link (or selection) of PUSCH power control parameter sets for multiple SRS resources according to an example implementation. For beam management SRS, beam scanning can be used for beam selection. (For example, beam 1 is used in subframe 1; beam 2 is used in subframe 2, or multiple beams can be activated per subframe). In this case, beam quality is not available to both the gNB / BS and the UE. In addition, it is not easy to obtain the corresponding PUSCH power control parameter sets for all beams. Therefore, according to the example implementation, the same PUSCH power control parameter set can be used for such SRSs (for all or multiple SRS signals), even with different beams / beam pairs for different SRS resources. For example, the UE and the BS do not necessarily know which beam is the best or preferred because the perspective of beam management is to determine the (multiple) updated preferred beams for UL (UE TX beam and BS RX beam). For simplicity, the PUSCH power control parameter set (for the SRS signal) can be linked to the most recently correctly transmitted PUSCH (the UE already knows the previously successfully used PUSCH power control parameter set for UL data transmission, e.g., during a previous time instance - both the UE and the BS implicitly know), or a default PUSCH power control parameter set that can be linked, or for example, the BS signals an indicated PUSCH power control parameter set to the UE via RRC signaling. For the example default PUSCH power control parameter set, it can be linked to a wide beam for robust transmission. Here, it is assumed that only one SRS resource is used for beam management.

[0116] As (multiple) illustrative examples, various illustrative features or example implementations may include one or more of the following:

[0117] 1) The BS and the UE can determine the (multiple) linked PUSCH power control parameter sets for determining the SRS transmission power according to the used transmission and reception beams for PUSCH and SRS; (e.g., based on the SRS beam pair matching the PUSCH beam pair); different configurations.

[0118] A) Dynamic explicit signaling via PDCCH DCI to indicate the index of the linked PUSCH power control parameter set

[0119] B) The UE's implicit principle / determination is based on the matching of the PUSCH and SRS beam pairs to determine the SRS link relationship or the linked PUSCH power control parameter set.

[0120] 2) Determine the link between the PUSCH power control parameters for SRS and PUSCH for each SRS resource (e.g., based on the SRS beam pair matching the PUSCH beam pair);

[0121] 3) The same set of PUSCH power control parameters can be used for beam management SRS with beam scanning. The UE can use one linked PUSCH power control parameter set for multiple SRS beam pairs (e.g., for SRS beam pairs 1 to 4, using the PUSCH parameter set for PUSCH beam 1).

[0122] A) Use the PUSCH power control parameter set of the previous or most recent PUSCH data transmission (known to the BS and UE) used for multiple SRS resources / SRS beam pairs.

[0123] B) Use the signaled (indicated by the BS to the UE) PUSCH power control parameter set for multiple SRS resources / SRS beam pairs.

[0124] C) Use the default (known to the BS and UE) PUSCH power control parameter set for multiple SRS resources / SRS beam pairs.

[0125] 4) Additional signaling can be used to indicate (from the BS to the UE) the digital basic configuration for SRS transmission. SRS and the linked PUSCH with the same power control parameter set have (should have) the same digital basic configuration. Different digital basic configurations can have different linked / linked PUSCH parameter sets (where the digital basic configuration can include, for example, subcarrier spacing, subframe length (time), time domain (OFDM symbol time period), and frequency domain (subcarrier spacing), transmission power, different beam widths). The digital basic configuration can include basic time / frequency characteristics. Multiple SRS resources are for parameter set 1, and multiple SRS resources are for parameter set 2. For SRS transmission, it may be necessary to include SRS resources for two different digital basic configurations, such as, for example, different beams / beam widths, different transmission powers, etc. The BS can indicate the digital basic configuration to the UE via higher layer / RRC signaling, e.g., within the SRS transmission parameter set. The BS can indicate the link (the linked PUSCH power control parameter set for the SRS signal) and the digital basic configuration to which the link applies.

[0126] Figure 9 is a diagram illustrating the operations of a base station and a user equipment (UE) implemented according to another example. From the BS side, the BS sends power control related information to allow the UE to transmit SRS with appropriate SRS transmit power. From the UE side, the UE measures and sets / adjusts the SRS transmit power, for example, according to gNB / BS indications (including dynamic and semi-static signaling).

[0127] At 910, for UE path loss measurement, the gNB (BS) transmits / sends a reference signal via one or more beams / beam pairs, e.g., such as a beam reference signal (BRS) or a channel state information reference signal (CSI-RS). For example, the UE then performs path loss (PL) measurement for each of the multiple beam pairs. For example, the UE can perform RSRP (reference signal received power) measurement based on the received CSI-RS and obtain the path loss for each PUSCH beam pair and each PUSCH power control parameter set.

[0128] At 920, the gNB / BS determines and sends multiple PUSCH power control parameter sets (values for each parameter, for each parameter set), including the open-loop part P0, α, and the closed-loop part α, for PUSCH with different transmit and receive beam pairs via RRC, and sends these parameters to the UE via higher layers (sending the open-loop part via RRC) and physical signaling or lower layer signaling (e.g., fc can be sent via PDCCH / DCI). The UE receives signaling for multiple PUSCH power control parameter sets and related offset values.

[0129] At 930, for each PUSCH power control parameter set, the gNB / BS configures a power offset (e.g., SRS power offset) value between the SRS and the linked PUSCH via higher layer signaling (e.g., via RRC signaling); for example, 1 offset value can be shared for all PUSCH power control parameter sets, or different offset values can be used for different PUSCH power control parameter sets. At 930, for example, the UE determines the transmit power of each SRS resource based on the gNb's signaling and the path loss measurement result according to the following formula: (the linked PUSCH power control parameter set can be signaled explicitly or can be determined implicitly - for parameter set k):

[0130] P SRS,c (i) = min{P CMAX,c (i), P SRS_OFFSET,c,k (m) + 10log 10 (M SRS,c ) + P O_PUSCH,c,k (j) + α c,k (j)·PL c,k + f c,k (i)}

[0131] [dBm]

[0132] where P O_PUSCH,c,k (j), α c,k (j) are indicated by RRC signaling, PL c,k is obtained by UE measurement, f c,k(i) Derived from TPC (Transmission Point) signaling. These parameters are obtained from the PUSCH parameter set k. For the power control parameter set index, this information can be indicated by the gNb / BS using dynamic (lower layer, e.g., PDCCH DCI) or higher layer signaling (e.g., RRC signaling). Note: For beam management SRS, only one linked PUSCH parameter set can be used to determine the SRS transmission power, although scanned beams can be used for SRS transmission. For example, it can be a default PUSCH power control parameter set for the PUSCH for correct transmission or the most recently used parameter set.

[0133] At 940, for each SRS resource, the gNB / BS sends signaling to indicate the linked PUSCH power control parameter set for the UE to determine the SRS transmission power according to the used beam pair (transmit and receive beams) that matches the PUSCH beam pair for SRS transmission. For aperiodic SRS, dynamic signaling (PDCCH / DCI) can be used to indicate the index of the linked PUSCH power control parameter set. The index of the linked PUSCH power control parameter set and the indication of the SRS transmission parameter set for each state indicated by the dynamic signaling can be included. For periodic SRS, semi-static signaling (RRC) can be used to indicate the index of the PUSCH power control parameter set. Implicit option - For this, no signaling is necessary, but the UE determines the link (the linked PUSCH power control parameter set for SRS) based on the matching PUSCH beam pair and SRS beam pair.

[0134] At 950, the UE transmits each SRS signal at the determined SRS transmission power via the corresponding SRS resource, e.g., based on the selected / linked PUSCH power control parameter set.

[0135] Various example implementations can have one or more advantages, such as, for example: performing accurate power control for SRS and reducing power consumption and inter-cell interference; can provide compatibility with flexible configurations for SRS; support more users with limited SRS resources;

[0136] Figure 10 It is a block diagram of a wireless station (e.g., AP or user equipment) 1000 according to an example implementation. For example, the wireless station 1000 can include one or two RF (Radio Frequency) or wireless transceivers 1002A, 1002B, where each wireless transceiver includes a transmitter for transmitting signals and a receiver for receiving signals. The wireless station also includes a processor or control unit / entity (controller) 1004 to execute instructions or software and control the transmission and reception of signals, and a memory 1006 to store data and / or instructions.

[0137] The processor 1004 can also make decisions or determinations, generate frames, packets, or messages for transmission, decode received frames or messages for further processing, and perform other tasks or functions described herein. For example, the processor 1004, which can be a baseband processor, can generate messages, packets, frames, or other signals for transmission via the wireless transceiver 1002 (1002A or 1002B). The processor 1004 can control the transmission of signals or messages over the wireless network and can control the reception of signals or messages via the wireless network (e.g., after being downconverted by, for example, the wireless transceiver 1002). The processor 1004 can be programmable and capable of executing software or other instructions stored in a memory or other computer medium to perform the various tasks and functions described above, such as one or more of the tasks or methods described above. For example, the processor 504 can be (or can include) hardware, programmable logic, a programmable processor that executes software or firmware, and / or any combination of these. For example, using other terms, the processor 1004 and the transceiver 1002 can be considered together as a wireless transmitter / receiver system.

[0138] In addition, referring to Figure 10 , the controller (or processor) 1008 can execute software and instructions and can provide overall control of the station 1000 and can provide control of Figure 10 other systems not shown, such as controlling input / output devices (e.g., a display, a keyboard), and / or can execute software for one or more applications that can be provided on the wireless station 1000, such as, for example, an email program, an audio / video application, a word processor, an IP voice application, or other applications or software.

[0139] In addition, a storage medium including stored instructions can be provided, and when executed by the controller or processor, the instructions can cause the processor 1004 or other controller or processor to perform one or more of the above functions or tasks.

[0140] According to another example implementation, the RF or wireless transceiver(s) 1002A / 1002B can receive signals or data and / or transmit or send signals or data. The processor 1004 (and possibly the transceiver 1002A / 1002B) can control the RF or wireless transceiver 1002A or 1002B to receive, send, broadcast, or transmit signals or data.

[0141] However, the embodiments are not limited to the systems given as examples, but those skilled in the art can apply the solution to other communication systems. Another example of a suitable communication system is the 5G concept. It is assumed that the network architecture in 5G will be very similar to that of advanced LTE. 5G may use multiple-input multiple-output (MIMO) antennas, more base stations or nodes than LTE (the so-called small cell concept), including macro sites operating in cooperation with smaller stations, and may also adopt various radio technologies to obtain better coverage and higher data rates.

[0142] It should be understood that future networks will most likely use network function virtualization (NFV), which is a network architecture concept that proposes virtualizing network node functions into "building blocks" or entities that can be operably connected or linked together to provide services. Virtualized network functions (VNFs) can include one or more virtual machines that run computer program code using standard or general types of servers instead of custom hardware. Cloud computing or data storage can also be used. In radio communication, this may mean that node operations can be performed at least partially in a server, host, or node operably coupled to a remote radio head. It is also possible that node operations will be distributed among multiple servers, nodes, or hosts. It should also be understood that the labor distribution between core network operations and base station operations can be different from LTE or may not even exist.

[0143] Implementations of the various techniques described herein can be implemented in digital electronic circuitry or in computer hardware, firmware, software, or in combinations thereof. The implementation can be implemented as a computer program product, i.e., a computer program tangibly embodied as an information carrier (e.g., tangibly embodied as a machine-readable storage device or a propagated signal) for use in a data processing apparatus (e.g., a programmable processor, a computer, or multiple computers) to perform or control the operation of the data processing apparatus. The implementation can also be provided on a computer-readable medium or a computer-readable storage medium (which can be a non-transitory medium). Implementations of the various techniques can also include implementations provided via transient signals or media and / or programs and / or software implementations that can be downloaded via the Internet or other networks, wired networks, and / or wireless networks. Additionally, the implementation can be provided via machine-type communication (MTC) and can also be provided via the Internet of Things (IoT).

[0144] A computer program can be in source code form, object code form, or some intermediate form, and it can be stored in some carrier, distribution medium, or computer-readable medium (which can be any entity or device capable of carrying the program). For example, such carriers include recording media, computer memories, read-only memories, optoelectronic and / or electrical carrier signals, telecommunication signals, and software distribution packages. Depending on the required processing power, the computer program can be executed in a single electronic digital computer, or it can be distributed among multiple computers.

[0145] In addition, the implementation of the various techniques described herein can use Cyber-Physical Systems (CPS) (systems of collaborative computing elements that control physical entities). CPS can enable the implementation and development of a large number of interconnected ICT devices (sensors, actuators, processors, microcontrollers, …) embedded in physical objects at different locations. Mobile Cyber-Physical Systems, where the physical systems under discussion have inherent mobility, are a subcategory of Cyber-Physical Systems. Examples of mobile physical systems include mobile robots and electronic products transported by humans or animals. The popularity of smartphones has increased people's interest in the field of Mobile Cyber-Physical Systems. Thus, various implementations of the techniques described herein can be provided via one or more of these techniques.

[0146] A computer program (such as the above-mentioned (multiple) computer programs) can be written in any form of programming language (including: compiled language or interpreted language), and can be deployed in any form (including: as a stand-alone program or module, component, subroutine, or other unit or part suitable for a computing environment). The computer program can be deployed to execute on one computer or on multiple computers located at one site or distributed across multiple sites and interconnected by a communication network.

[0147] Method steps can be executed by one or more programmable processors that execute a computer program or a part of a computer program to perform a function by operating on input data and generating output. Method steps can also be executed by dedicated logic circuitry (e.g., FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit)), and the apparatus can be implemented as such dedicated logic circuitry.

[0148] Processors suitable for executing computer programs include, for example, general and special purpose microprocessors, and any one or more processors of any kind of digital computer, chip, or chipset. In general, a processor will receive instructions and data from a read only memory or a random access memory or both. Elements of a computer may include at least one processor for executing instructions, and one or more memory devices for storing instructions and data. In general, a computer may also include or be operatively coupled to one or more mass storage devices for storing data from which it can receive data or to which it can transfer data or both, such as, magnetic disks, magneto-optical disks, or optical disks. Information carriers suitable for embodying computer program instructions and data include all forms of non-volatile memory, including, for example, semiconductor memory devices (such as, EPROM, EEPROM, and flash memory devices), magnetic disks (such as, internal hard disks or removable disks), magneto-optical disks, and CD-ROM and DVD-ROM disks. The processor and the memory may be supplemented by, or incorporated in, special purpose logic circuitry.

[0149] For providing interaction with a user, an implementation can be implemented 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; and a user interface, such as, a keyboard and a pointing device, such as, a mouse or a trackball, by which the user can provide input to the computer. Other kinds of devices may also be used to provide interaction with the user; for example, feedback provided to the user may be any form of sensory feedback, such as, visual feedback, auditory feedback, or tactile feedback; and input received from the user may be in any form (including acoustic input, voice input, or tactile input).

[0150] An implementation can be implemented in a computing system including backend components (such as, a data server), or a computing system including middleware components (such as, an application server), or a computing system including frontend components (such as, a client computer having a graphical user interface or a web browser through which the user can interact with the implementation), or in a computing system including any combination of such backend, middleware, or frontend components. Components may 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.

[0151] Although certain features of the described implementations are illustrated as described herein, many modifications, substitutions, changes, and equivalents will now occur to those skilled in the art. Accordingly, it is to be understood that the appended claims are intended to cover all such modifications and changes that fall within the true spirit of the various embodiments.

Claims

1. A method for operating a user equipment, wherein the user equipment is configured to perform uplink data channel transmission via an uplink data channel beam pair including a user equipment transmission beam and a base station reception beam, and perform sounding reference signal transmission via a sounding reference signal beam pair including a user equipment transmission beam and a base station reception beam, the method comprising: receiving (310) control information from a base station (134) by the user equipment (131, ..., 135), the control information indicating that an uplink data channel power control parameter for an uplink data channel beam should be used to adjust a sounding reference signal transmission power, the uplink data channel beam being a transmission beam of the user equipment included in the uplink data channel beam pair; Determining, by the user equipment (131, ..., 135) based on the received control information, a specific uplink data channel power control parameter set to adjust the sounding reference signal transmission power; adjusting (340), by the user equipment (131, ..., 135), the sounding reference signal transmission power of a sounding reference signal beam based on the determined specific uplink data channel power control parameter set, the sounding reference signal beam being the user equipment transmission beam included in the sounding reference signal beam pair, wherein the sounding reference signal beam matches the uplink data channel beam; as well as A sounding reference signal is transmitted (350) by the user equipment (131, ..., 135) via a sounding reference signal resource and the sounding reference signal beam with the adjusted sounding reference signal transmission power.

2. The method according to claim 1, wherein: The uplink data channel power control parameter set of the uplink data channel beam includes a physical uplink shared channel (PUSCH) power control parameter set of a PUSCH beam.

3. A method according to any one of the preceding claims, wherein: The uplink data channel power control parameter set includes a plurality of uplink physical resource blocks for sounding reference signal transmission, and The sounding reference signal transmission power is adjusted by the user equipment (131, ..., 135) based on the number of uplink physical resource blocks used for sounding reference signal transmission.

4. The method according to claim 1 or 2, further comprising: Receiving a channel state information reference signal by the user equipment (131, ..., 135); The user equipment (131, ..., 135) estimates a downlink path loss based on a channel state information reference signal; and Wherein, the user equipment (131, ..., 135) adjusts the sounding reference signal transmission power based on the estimated downlink path loss.

5. The method according to claim 1 or 2, wherein The uplink data channel power control parameter set includes a closed-loop power adjustment parameter, and The user equipment (131, ..., 135) adjusts the sounding reference signal transmission power based on the closed-loop power adjustment parameter.

6. The method according to claim 1 or 2, further comprising: Receiving, by the user equipment (131, ..., 135), information identifying a digital basic configuration to be used by the user equipment for transmission of a sounding reference signal; The user equipment (131, ..., 135) adjusts the sounding reference signal transmission power based on the digital basic configuration.

7. The method according to claim 6, wherein The uplink data channel and the sounding reference signal with the same power control parameter set have the same digital basic configuration, and / or For sounding reference signal transmission, there are multiple sounding reference signal resources for different digital basis configurations.

8. A user equipment, the user equipment being configured to perform uplink data channel transmission via an uplink data channel beam pair including a user equipment transmission beam and a base station reception beam, and to perform sounding reference signal transmission via a sounding reference signal beam pair including a user equipment transmission beam and a base station reception beam, comprising: means adapted to receive control information indicating that an uplink data channel power control parameter for an uplink data channel beam, said uplink data channel beam being said user equipment transmission beam comprised in said uplink data channel beam pair, should be used to adjust a sounding reference signal transmission power; means adapted to determine a specific uplink data channel power control parameter set based on the received control information to adjust the sounding reference signal transmission power; means adapted to adjust (340) the sounding reference signal transmission power of a sounding reference signal beam, the sounding reference signal beam being the user equipment transmission beam included in the sounding reference signal beam pair, based on the determined set of power control parameters for the specific uplink data channel, wherein the sounding reference signal beam matches the uplink data channel beam; as well as Means adapted to transmit (350) a sounding reference signal via a sounding reference signal resource and said sounding reference signal beam with said adjusted sounding reference signal transmission power.

9. The user equipment according to claim 8, wherein: The uplink data channel power control parameter set includes a physical uplink shared channel (PUSCH) power control parameter set for a PUSCH beam.

10. The user equipment according to any one of claims 8 and 9, wherein The uplink data channel power control parameter set includes a plurality of uplink physical resource blocks for sounding reference signal transmission, and The means for adjusting are adapted to adjust the sounding reference signal transmission power based on a number of uplink physical resource blocks used for sounding reference signal transmission.

11. The user equipment according to any one of claims 8 and 9, further comprising: means adapted to receive a channel state information reference signal; means adapted to estimate downlink path loss based on a channel state information reference signal; and Therein, the means for adjusting is adapted to adjust the sounding reference signal transmission power based on the estimated downlink path loss.

12. The user equipment according to any one of claims 8 and 9, wherein The uplink data channel power control parameter set includes a closed-loop power adjustment parameter, and The means for adjusting is adapted to adjust the sounding reference signal transmission power based on the closed loop power adjustment parameter.

13. The user equipment according to any one of claims 8 and 9, further comprising: means for receiving information identifying a digital basic configuration to be used by the user equipment for transmission of a sounding reference signal; Therein, the component adapted to adjust is adapted to adjust the sounding reference signal transmission power based on the digital basic configuration.

14. The user equipment according to claim 13, wherein The uplink data channel and the sounding reference signal with the same power control parameter set have the same digital basic configuration, and / or For sounding reference signal transmission, there are multiple sounding reference signal resources for different digital basis configurations.

15. A computer program product comprising a non-transitory computer-readable storage medium and storing executable code, which, when executed by at least one data processing device, is configured to cause the at least one data processing device to perform the method according to any one of claims 1 to 7.

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