WO2022133709A1

WO2022133709A1 - Method and apparatus for physical uplink shared channel (pusch) transmission

Info

Publication number: WO2022133709A1
Application number: PCT/CN2020/138244
Authority: WO
Inventors: Wei Ling; Chenxi Zhu; Bingchao LIU; Yi Zhang; Lingling Xiao
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2022-06-30
Anticipated expiration: 2023-06-22

Abstract

Embodiments of the present application are related to a method and apparatus for physical uplink shared channel (PUSCH) transmission. An exemplary method of the present application includes: receiving downlink control information (DCI) scheduling a PUSCH; and transmitting the PUSCH with a uplink (UL) transmit spatial filter according to a pathloss reference reference signal (RS) when a common UL transmit spatial filter is applicable for UL transmission, wherein the UL transmit spatial filter and the pathloss reference RS are associated with one of the DCI and the common UL transmit spatial filter.

Description

METHOD AND APPARATUS FOR PHYSICAL UPLINK SHARED CHANNEL (PUSCH) TRANSMISSION

TECHNICAL FIELD

Embodiments of the present application generally relate to wireless communication technology, especially to a method and an apparatus for physical uplink shared channel (PUSCH) transmission.

BACKGROUND

Regarding enhancements on multiple-input multiple-output (MIMO) for new radio (NR) , a work item description (WID) approved in NR R17 includes enhancement on multi-beam operation, mainly targeting frequency range (FR) 2 while also applicable to FR1. Wherein, a research topic is to identify and specify features to facilitate more efficient (lower latency and overhead) downlink/uplink (DL/UL) beam management to support higher intra-band and L1/L2-centric inter-cell mobility and/or a larger number of configured transmission configuration indication (TCI) states, including common beam for data and control transmission/reception for DL and UL, especially for intra-band carrier aggregation (CA) .

In addition, it has been agreed that downlink control information (DCI) format 1_1 and DCI format 1_2 can be used for DL and UL joint common beam indication, and it has been proposed that DCI format 1_1 and DCI format 1_2 can be used for UL only common beam indication in RAN1 #103e. However, legacy UL DCI can indicate beam and pathloss reference reference signal (RS) for PUSCH transmission by using the sounding reference signal (SRS) indicator (SRI) field in R15. When a user equipment (UE) receives legacy DCI indicating beam and pathloss reference RS for PUSCH transmission while a common beam is also applicable for the PUSCH transmission, how to determine the beam and pathloss reference RS for PUSCH transmission should be solved.

SUMMARY OF THE APPLICATION

One objective of the embodiments of the present application is to provide a technical solution for PUSCH transmission, e.g., determination of UL transmit spatial filter and pathloss reference RS for PUSCH transmission.

According to an embodiment of the present application, a method may include: receiving DCI scheduling a PUSCH; and transmitting the PUSCH with a UL transmit spatial filter according to a pathloss reference RS when a common UL transmit spatial filter is applicable for UL transmission, wherein the UL transmit spatial filter and the pathloss reference RS are associated with one of the DCI and the common UL transmit spatial filter.

According to another embodiment of the present application, a method includes: transmitting DCI scheduling a PUSCH; and receiving the PUSCH when a common UL transmit spatial filter is applicable for UL transmission, wherein the PUSCH is transmitted according to a UL transmit spatial filter and a pathloss reference RS, and the UL transmit spatial filter and the pathloss reference RS are associated are associated with one of the DCI and the common UL transmit spatial filter.

In some embodiments of the present application, the UL transmit spatial filter is the common UL transmit spatial filter. In some other embodiments of the present application, when there is an SRI field in the DCI indicating at least one SRS resource configured with spatial relation information, the UL transmit spatial filter is determined by the spatial relation information. When there is no SRI field in the DCI or all SRS resource (s) indicated by an SRI field in the DCI is not configured with spatial relation information, the UL transmit spatial filter is the common UL transmit spatial filter.

In some embodiments of the present application, the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter. In some other embodiments of the present application, when a SRI value is indicated in the DCI and SRI-PUSCH-PowerControl is configured by a radio resource control (RRC) signaling, the pathloss reference RS is a pathloss reference RS indicated by mapping the SRI value to the SRI-PUSCH-PowerControl. When no SRI value is indicated in the DCI or no SRI-PUSCH-PowerControl is configured by a RRC signaling, the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter.

In some embodiments of the present application, the DCI is DCI with DCI format 0_1 or DCI format 0_2.

Some embodiments of the present application also provide an apparatus, including: at least one non-transitory computer-readable medium having computer executable instructions stored therein, at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry and the at least one transmitting circuitry. The computer executable instructions are programmed to implement any method as stated above with the at least one receiving circuitry, the at least one transmitting circuitry and the at least one processor.

Embodiments of the present application provide a technical solution for PUSCH transmission, especially for determination of UL transmit spatial filter and pathloss reference RS for PUSCH transmission scheduled by legacy DCI while a common UL transmit spatial filter is also applicable for UL transmission, and thus can facilitate and improve the implementation of 5G NR.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the manner in which advantages and features of the application can be obtained, a description of the application is rendered by reference to specific embodiments thereof, which are illustrated in the appended drawings. These drawings depict only example embodiments of the application and are not therefore to be considered limiting of its scope.

FIG. 1 is a schematic diagram illustrating an exemplary wireless communication system according to an embodiment of the present application;

FIG. 2 is a flow chart illustrating a method for PUSCH transmission according to some embodiments of the present application; and

FIG. 3 is illustrates a block diagram of an apparatus for PUSCH transmission according to some embodiments of the present application.

DETAILED DESCRIPTION

The detailed description of the appended drawings is intended as a description of preferred embodiments of the present application, and is not intended to represent the only form in which the present application may be practiced. It should be understood that the same or equivalent functions may be accomplished by different embodiments that are intended to be encompassed within the spirit and scope of the present application.

Reference will now be made in detail to some embodiments of the present application, examples of which are illustrated in the accompanying drawings. To facilitate understanding, embodiments are provided under specific network architecture and new service scenarios, such as 3rd generation partnership project (3GPP) 5G, 3GPP long term evolution (LTE) R8 and so on. Persons skilled in the art know very well that, with the development of network architecture and new service scenarios, the embodiments in the present application are also applicable to similar technical problems.

FIG. 1 illustrates a schematic diagram of an exemplary wireless communication system 100 according to some embodiments of the present application.

Specifically, as shown in FIG. 1, the exemplary wireless communication system 100 includes a base station (BS) 101, and a UE 103. Although only one BS 101 and one UE 103 are shown for simplicity, it should be noted that the wireless communication system 100 may further include more BSs 101 and UEs 103. The wireless communication system 100 is compatible with any type of network that is capable of sending and receiving wireless communication signals. For example, the wireless communication system 100 is compatible with a wireless communication network, a cellular telephone network, a time division multiple access (TDMA) -based network, a code division multiple access (CDMA) -based network, an orthogonal frequency division multiple access (OFDMA) -based network, an LTE network, a 3GPP-based network, a 3GPP 5G network, a satellite communications network, a high altitude platform network, and/or other communications networks.

The BS 101 may be distributed over a geographic region, and generally be a part of a radio access network (RAN) that may include one or more controllers communicably coupled to one or more corresponding BSs 101. In some embodiments of the present application, the BS 101 may also be referred to as an access point, an access terminal, a base, a macro cell, a Node-B, an evolved Node B (eNB) , a transmission receiver point (TRP) , a gNB, a Home Node-B, a relay node, a device, or described using other terminology used in the art.

The UE 103 may be or include a computing device, such as a desktop computer, a laptop computer, a personal digital assistant (PDA) , a tablet computer, a smart television (e.g., a television connected to the Internet) , a set-top box, a game console, a security system (including a security camera) , a vehicle on-board computer, a network device (e.g., a router, a switch, or a modem) , or the like. According to some other embodiments of the present application, the UE 103 may be or include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiver, or any other device that is capable of sending and receiving communication signals on a wireless network. In addition, the UE 103 may also be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or described using other terminology used in the art. Different UEs 103 may be with the same device type or different device types.

According to the latest 3GPP specification, the beam and pathloss reference RS of PUSCH scheduled by legacy DCI with DCI format 0_1 and DCI format 0_2 can be indicated by the SRI field of the legacy DCI. Meanwhile, according to NR R17, to enhance MIMO for NR, common beam for data and control transmission/reception for DL and UL will be used, especially for intra-band CA. A common pathloss reference RS may be also defined, which is associated with a UL common beam. Herein (through the specification) , legacy DCI is for distinguishing from DCI for indicating a common (DL and/or UL) beam in a clear and concise manner, that is, legacy DCI just means DCI not being used to indicate a common beam. Similarly, DCI for indicating a common (DL and/or UL) beam may also be referred to as dedicated DCI to distinguish from DCI not being used to indicate a common beam in a clear and concise manner. The terminology "beam" can be represented by spatial relation information or TCI state etc. For example, a UL beam may be a RS resource which determines the UL transmit spatial filter in some scenarios.

Given the above, for a PUSCH scheduled by legacy DCI in a UE, if the legacy DCI has a SRI field where the SRS resource associated the PUSCH is configured with spatial relation information while a previously indicated UL common beam is still applicable for UL transmission, the UE has to determine the UL beam to transmit the PUSCH. Meanwhile, since a common pathloss reference RS can be indicated associated with the UL common beam, the UE also needs to determine the pathloss reference RS for the PUSCH transmission when the SRI field is present in the legacy DCI and SRI-PUSCH-PowerControl is configured.

At least for solving the above technical problems, embodiments of the present application provide a technical solution for PUSCH transmission, especially for determination of beam and pathloss reference RS for PUSCH transmission.

FIG. 2 illustrates a flow chart of a method for PUSCH transmission according to some embodiments of the present application. Although the method is illustrated in a system level by a UE in a remote side (or UE side) and a BS in a network side (or BS side) , persons skilled in the art can understand that the method implemented in the remote side and that implemented in the network side can be separately implemented and incorporated by other apparatus with the like functions.

In the exemplary method shown in FIG. 2, in step 202, the network side, e.g., a BS 101 as shown in FIG. 1 may transmit DCI scheduling a PUSCH, to the remote side, e.g., a UE 103 as shown in FIG. 1. Accordingly, in the remote side, in step 203, the UE receives the DCI scheduling the PUSCH. In some embodiments of the present application, the DCI scheduling the PUSCH may be DCI with DCI format 0_1 or DCI format 0_2, which can be configured for PUSCH transmission in various manners according to 3GPP specification (s) .

For example, there may be an SRI field in the DCI. The SRI field may indicate at least one SRS resource configured with spatial relation information in some embodiments of the present application, which may be used for determining the beam (or UL transmit spatial filter) for the PUSCH transmission. In some embodiments of the present application, the SRI field may indicate an SRI value, which may be used for determining the pathloss reference RS for the PUSCH transmission with a configured parameter SRI-PUSCH-PowerControl or the like.

Besides the DCI scheduling the PUSCH, the network side may also configure other information for the PUSCH transmission in the UE. For example, the network side may configure the parameter SRI-PUSCH-PowerControl via a RRC signaling, which may be used for determining the pathloss reference RS for the PUSCH transmission with the SRI value as stated above. When a common beam indication scheme is applied, the BS 101 may transmit dedicated DCI indicating a common UL transmit spatial filter for UL transmission, which may also be applicable for the UL transmission of the UE. In some embodiments of present application, the dedicated DCI may be transmitted before transmitting the DCI scheduling the PUSCH. The BS may also configure a higher layer parameter txConfig in pusch-Config to indicate the transmission scheme to be codebook based transmission or non-codebook based transmission.

In step 205, the UE may transmit the PUSCH scheduled by the DCI with a UL transmit spatial filter according to a pathloss reference RS, e.g., when the common UL transmit spatial filter is applicable for UL transmission. Accordingly, in the network side, in step 204, the BS may receive the PUSCH transmitted by the UE with the UL transmit spatial filter according to the pathloss reference RS, e.g., when the common UL transmit spatial filter is applicable for UL transmission.

Specifically, in some scenarios, when the UE is to transmit the PUSCH scheduled by the DCI, the common UL transmit spatial filter may be still is applicable for UL transmission in the UE. That means that the UE has to determine the beam and pathloss RS for the PUSCH transmission. Embodiments of the present application propose a technical solution to solve that. For example, when the common UL transmit spatial filter may be still is applicable for UL transmission, the UL transmit spatial filter and the pathloss reference RS are associated with one of the DCI and the common UL transmit spatial filter. Several specific schemes may be developed based on this basic technical solution. The network side may configure a RRC signaling to indicate the UE which specific scheme is applied.

According to a first scheme for beam determination, regardless the DCI scheduling the PUSCH, only if the common UL transmit spatial filter is applicable for UL transmission, the UL transmit spatial filter is the common UL transmit spatial filter according to some embodiments of the present application. That is, whether the SRS resource (s) indicated by the SRI in the legacy DCI is configured with spatial relation information does not matter. The PUSCH scheduled by legacy DCI with DCI format 0_1 or DCI format 0_2 is always transmitted by using the applicable UL common beam.

According to a second scheme for beam determination, related information indicated in the DCI will be considered. In some embodiments of the present application, when there is an SRI field in the DCI indicating at least one SRS resource configured with spatial relation information, the UL transmit spatial filter is determined by the spatial relation information. In this situation, the UE can transmit the PUSCH with the UL transmit spatial filter in the same way as the PUSCH scheduled by legacy DCI. For example, according to TS 38.214 in R15/R16, two transmission schemes are supported for PUSCH transmission, i.e., codebook based transmission and non-codebook based transmission. Some related contents are as following:

"AUE is configured with codebook based transmission when the higher layer parameter txConfig in pusch-Config is set to "codebook, " and the UE is configured non-codebook based transmission when the higher layer parameter txConfig is set to "nonCodebook. " If the higher layer parameter txConfig is not configured, the UE is not expected to be scheduled by DCI format 0_1 or 0_2. If PUSCH is scheduled by DCI format 0_0, the PUSCH transmission is based on a single antenna port. Except if the higher layer parameter enableDefaultBeamPL-ForPUSCH0-r16 is set "enabled, " the UE shall not expect PUSCH scheduled by DCI format 0_0 in a bandwidth part (BWP) without configured physical uplink control channel (PUCCH) resource with PUCCH-SpatialRelationInfo in FR 2 in RRC connected mode. In both the two transmission schemes, the indicated SRI in slot n is associated with the most recent transmission of SRS resource identified by the SRI, where the SRS resource is prior to the physical downlink control channel (PDCCH) carrying the SRI. In codebook based transmission scheme, the UE shall transmit PUSCH using the same antenna port (s) as the SRS port (s) in the SRS resource indicated by the DCI format 0_1 or 0_2 or by configuredGrantConfig according to clause 6.1.2.3. In non-codebook based transmission, the UE shall transmit PUSCH using the same antenna ports as the SRS port (s) in the SRS resource (s) indicated by SRI (s) given by DCI format 0_1 or by configuredGrantConfig according to clause 6.1.2.3, where the SRS port in (i+1) -th SRS resource in the SRS resource set is indexed as p _i=1000+i. "

In some other embodiments of the present application, when there is no SRI field in the DCI or all SRS resource (s) indicated by an SRI field in the DCI is not configured with spatial relation information, the UL transmit spatial filter is the common UL transmit spatial filter. Thus, a dedicated UL beam other than the applicable UL common beam can be indicated for a single PUSCH even though the UL common beam is applicable in the second scheme for beam determination.

Regarding the pathloss reference RS determination, there are also two specific schemes.

In some embodiments of the present application, according to a first scheme for pathloss reference RS determination, only if the common UL transmit spatial filter is applicable, the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter. That is, regardless whether a SRI value is indicated in the DCI and SRI-PUSCH-PowerControl is configured, the PUSCH scheduled by legacy DCI is always transmitted according to a pathloss reference RS associated with the common UL transmit spatial filter.

According to a second scheme for pathloss reference RS determination, in some embodiments of the present application, when a SRI value is indicated in the DCI and SRI-PUSCH-PowerControl is configured by a RRC signaling, the pathloss reference RS is a pathloss reference RS indicated by mapping the SRI value to the SRI-PUSCH-PowerControl. In this situation, the UE can transmit the PUSCH according to the pathloss reference RS in the same way as the PUSCH scheduled by legacy DCI. For example, according to TS 38.213 7.1.1 in R15/R16, "if the UE is provided SRI-PUSCH-PowerControl and more than one values of PUSCH-PathlossReferenceRS-Id, the UE obtains a mapping from sri-PUSCH-PowerControlId in SRI-PUSCH-PowerControl between a set of values for the SRI field in a DCI format scheduling the PUSCH transmission and a set of PUSCH-PathlossReferenceRS-Id values and determines the RS resource index q _d from the value of PUSCH-PathlossReferenceRS-Id that is mapped to the SRI field value where the RS resource is either on serving cell c or, if provided, on a serving cell indicated by a value of pathlossReferenceLinking. "

In some other embodiments of the present application, when no SRI value is indicated in the DCI or no SRI-PUSCH-PowerControl is configured, the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter. Thus, a dedicated pathloss reference RS other than the common pathloss reference RS can be indicated for a single PUSCH even though the common pathloss reference RS associated with the UL common beam is applicable in the second scheme for pathloss reference RS determination.

The schemes for beam determination and schemes for pathloss reference RS determination are separated from each other. In some embodiments of the present application, they may be separated determined according to separate RRC signalings. For example, the RRC signalings may respectively configure the scheme for beam determination is the first scheme, while the scheme for pathloss reference RS determination is the first scheme or the second scheme. In some embodiments of the present application, a RRC signaling may indicate both the scheme for beam determination and scheme for pathloss reference RS determination.

In addition, embodiments of the present application also propose an apparatus for PUSCH transmission. For example, FIG. 3 illustrates a block diagram of an apparatus 300 for PUSCH transmission according to some embodiments of the present application.

As shown in FIG. 3, the apparatus 300 may include at least one non-transitory computer-readable medium 301, at least one receiving circuitry 302, at least one transmitting circuitry 304, and at least one processor 306 coupled to the non-transitory computer-readable medium 301, the receiving circuitry 302 and the transmitting circuitry 304. The apparatus 300 may be a network side apparatus (e.g., a BS) configured to perform a method illustrated in FIG. 2 and the like, or a remote unit (e.g., a UE) configured to perform a method illustrated in FIG. 2 or the like.

Although in this figure, elements such as the at least one processor 306, transmitting circuitry 304, and receiving circuitry 302 are described in the singular, the plural is contemplated unless a limitation to the singular is explicitly stated. In some embodiments of the present application, the receiving circuitry 302 and the transmitting circuitry 304 can be combined into a single device, such as a transceiver. In certain embodiments of the present application, the apparatus 300 may further include an input device, a memory, and/or other components.

For example, in some embodiments of the present application, the non-transitory computer-readable medium 301 may have stored thereon computer-executable instructions to cause a processor to implement the method with respect to the UE as described above. For example, the computer-executable instructions, when executed, cause the processor 306 interacting with receiving circuitry 302 and transmitting circuitry 304, so as to perform the steps with respect to the UE depicted in FIG. 2.

In some embodiments of the present application, the non-transitory computer-readable medium 301 may have stored thereon computer-executable instructions to cause a processor to implement the method with respect to the BS as described above. For example, the computer-executable instructions, when executed, cause the processor 306 interacting with receiving circuitry 302 and transmitting circuitry 304, so as to perform the steps with respect to the BS depicted in FIG. 2.

The method according to embodiments of the present application can also be implemented on a programmed processor. However, the controllers, flowcharts, and modules may also be implemented on a general purpose or special purpose computer, a programmed microprocessor or microcontroller and peripheral integrated circuit elements, an integrated circuit, a hardware electronic or logic circuit such as a discrete element circuit, a programmable logic device, or the like. In general, any device on which resides a finite state machine capable of implementing the flowcharts shown in the figures may be used to implement the processor functions of this application. For example, an embodiment of the present application provides an apparatus including a processor and a memory. Computer programmable instructions for implementing a method stored in the memory, and the processor is configured to perform the computer programmable instructions to implement the method. The method may be a method as stated above or other method according to an embodiment of the present application.

An alternative embodiment preferably implements the methods according to embodiments of the present application in a non-transitory, computer-readable storage medium storing computer programmable instructions. The instructions are preferably executed by computer-executable components preferably integrated with a network security system. The non-transitory, computer-readable storage medium may be stored on any suitable computer readable media such as RAMs, ROMs, flash memory, EEPROMs, optical storage devices (CD or DVD) , hard drives, floppy drives, or any suitable device. The computer-executable component is preferably a processor but the instructions may alternatively or additionally be executed by any suitable dedicated hardware device. For example, an embodiment of the present application provides a non-transitory, computer-readable storage medium having computer programmable instructions stored therein. The computer programmable instructions are configured to implement a method as stated above or other method according to an embodiment of the present application.

While this application has been described with specific embodiments thereof, it is evident that many alternatives, modifications, and variations may be apparent to those skilled in the art. For example, various components of the embodiments may be interchanged, added, or substituted in the other embodiments. Also, all of the elements of each figure are not necessary for operation of the disclosed embodiments. For example, one of ordinary skill in the art of the disclosed embodiments would be enabled to make and use the teachings of the application by simply employing the elements of the independent claims. Accordingly, embodiments of the application as set forth herein are intended to be illustrative, not limiting. Various changes may be made without departing from the spirit and scope of the application.

Claims

A method, comprising:

receiving downlink control information (DCI) scheduling a physical uplink shared control channel (PUSCH) ; and

transmitting the PUSCH with a uplink (UL) transmit spatial filter according to a pathloss reference reference signal (RS) when a common UL transmit spatial filter is applicable for UL transmission, wherein the UL transmit spatial filter and the pathloss reference RS are associated with one of the DCI and the common UL transmit spatial filter.
The method of Claim 1, wherein the UL transmit spatial filter is the common UL transmit spatial filter.
The method of Claim 1, wherein when there is a sounding reference signal (SRS) indicator (SRI) field in the DCI indicating at least one SRS resource configured with spatial relation information, the UL transmit spatial filter is determined by the spatial relation information.
The method of Claim 3, wherein when there is no SRI field in the DCI or all SRS resource (s) indicated by an SRI field in the DCI is not configured with spatial relation information, the UL transmit spatial filter is the common UL transmit spatial filter.
The method of Claim 1, wherein the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter.
The method of Claim 1, wherein when a sounding reference signal (SRS) indicator (SRI) value is indicated in the DCI and SRI-PUSCH-PowerControl is configured by a radio resource control (RRC) signaling, the pathloss reference RS is a pathloss reference RS indicated by mapping the SRI value to the SRI-PUSCH-PowerControl; and when no SRI value is indicated in the DCI or no SRI-PUSCH-PowerControl is configured by a RRC signaling, the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter.
The method of Claim 1, wherein the DCI is DCI with DCI format 0_1 or DCI format 0_2.
A method, comprising:

transmitting downlink control information (DCI) scheduling a physical uplink shared control channel (PUSCH) ; and

receiving the PUSCH when a common uplink (UL) transmit spatial filter is applicable for UL transmission, wherein the PUSCH is transmitted according to a UL transmit spatial filter and a pathloss reference RS, and the UL transmit spatial filter and the pathloss reference RS are associated with one of the DCI and the common UL transmit spatial filter.
The method of Claim 8, wherein the UL transmit spatial filter is the common UL transmit spatial filter.
The method of Claim 8, wherein when there is a sounding reference signal (SRS) indicator (SRI) field in the DCI indicating at least one SRS resource configured with spatial relation information, the UL transmit spatial filter is determined by the spatial relation information.
The method of Claim 10, wherein when there is no SRI field in the DCI or all SRS resource (s) indicated by an SRI field in the DCI is not configured with spatial relation information, the UL transmit spatial filter is the common UL transmit spatial filter.
The method of Claim 8, wherein the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter.
The method of Claim 8, wherein when a sounding reference signal (SRS) indicator (SRI) value is indicated in the DCI and SRI-PUSCH-PowerControl is configured by a radio resource control (RRC) signaling, the pathloss reference RS is a pathloss reference RS indicated by mapping the SRI value to the SRI-PUSCH-PowerControl; and when no SRI value is indicated in the DCI or no SRI-PUSCH-PowerControl is configured by a RRC signaling, the pathloss reference RS is a pathloss reference RS associated with the common UL transmit spatial filter.
The method of Claim 8, wherein the DCI is DCI with DCI format 0_1 or DCI format 0_2.
An apparatus, comprising:

at least one non-transitory computer-readable medium having stored thereon computer-executable instructions;

at least one receiving circuitry;

at least one transmitting circuitry; and

at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry and the at least one transmitting circuitry,

wherein the computer-executable instructions cause the at least one processor to implement the method of any of Claims 1-14 with the at least one receiving circuitry and the at least one transmitting circuitry.