WO2022151316A1

WO2022151316A1 - Methods, apparatus and systems for multicast or broadcast transmission

Info

Publication number: WO2022151316A1
Application number: PCT/CN2021/072034
Authority: WO
Inventors: Chenchen Zhang; Xing Liu; Xingguang WEI; Peng Hao
Original assignee: Zte Corporation
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2022-07-21
Also published as: EP4256877A1; EP4256877A4; CN116724627A

Abstract

Methods, apparatus and systems for wireless transmission under a mode of multicast or broadcast service (MBS) are disclosed. In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises: receiving, from a wireless communication node, a configuration indicating a granularity for frequency domain resource related to MBS transmission to the wireless communication device, wherein the granularity is determined based on a frequency domain resource range for the MBS transmission; and determining the frequency domain resource related to the MBS transmission based on the granularity.

Description

METHODS, APPARATUS AND SYSTEMS FOR MULTICAST OR BROADCAST TRANSMISSION

TECHNICAL FIELD

The disclosure relates generally to wireless communications and, more particularly, to methods, apparatus and systems for wireless transmission under a mode of multicast or broadcast service.

BACKGROUND

A fifth-generation (5G) new radio (NR) network will support a series of unicast features for unicast transmissions. But no feature related to multicast or broadcast service (MBS) has yet been specified for the 5G NR network to support. To realize multicast transmission for multiple user equipments (UEs) , common frequency domain resources may be configured for multiple UEs so that multicast services can be transmitted to the UEs through these common frequency domain resources. On a unicast bandwidth part (BWP) , several common physical resource blocks (PRBs) can be configured for UEs as common frequency domain resources, or dedicated MBS BWPs for multicast transmission can also be configured for UEs.

A UE can send a physical uplink control channel (PUCCH) that carries multicast transmission information to the base station. In scenarios where channel reciprocity is applicable, the UE also send a sounding reference signal (SRS) to the base station to help the base station to obtain the downlink CSI on the common frequency domain resources. But there is no existing solution on either how to enable multiple UEs receiving multicast transmissions to have the same understanding of resource allocation for MBS transmission, or how such UEs send PUCCH and SRS related to MBS transmission to a base station.

SUMMARY OF THE INVENTION

The exemplary embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, exemplary systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of the present disclosure.

In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises: receiving, from a wireless communication node, a configuration indicating a granularity for frequency domain resource related to multicast or broadcast service (MBS) transmission to the wireless communication device, wherein the granularity is determined based on a frequency domain resource range for the MBS transmission; and determining the frequency domain resource related to the MBS transmission based on the granularity.

In a further embodiment, a method performed by a wireless communication device is disclosed. The method comprises: determining, among an uplink (UL) bandwidth part (BWP) and a UL multicast or broadcast service (MBS) BWP, at least one activated bandwidth part (BWP) for uplink transmission from the wireless communication device to a wireless communication node. The at least one activated BWP is determined based on at least one of: the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when both a downlink (DL) BWP and a DL MBS BWP are activated; the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when the DL BWP is activated and the DL MBS BWP is not activated; the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated, when the DL BWP is not activated and the DL MBS BWP is activated; or the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is also activated, when both the DL BWP and the DL MBS BWP are activated.

In another embodiment, a method performed by a wireless communication device is disclosed. The method comprises: determining a type of a physical uplink control channel (PUCCH) among a plurality of PUCCH types; selecting, based on a semi-static configuration by a wireless communication node or based on a system pre-definition, one of a plurality of closed-loop power control modes according to the determined type; and transmitting, to the wireless communication node, the PUCCH based on the selected closed-loop power control mode.

In another embodiment, a method performed by a wireless communication node is disclosed. The method comprises: transmitting, to a wireless communication device, a configuration indicating a granularity for frequency domain resource related to multicast or broadcast service (MBS) transmission to the wireless communication device. The granularity is determined based on a frequency domain resource range for the MBS transmission. The frequency domain resource related to the MBS transmission is determined based on the granularity.

In yet another embodiment, a method performed by a wireless communication node is disclosed. The method comprises: configuring, for a wireless communication device, at least one activated bandwidth part (BWP) , among an uplink (UL) bandwidth part (BWP) and a UL multicast or broadcast service (MBS) BWP, for uplink transmission from the wireless communication device to the wireless communication node. The at least one activated BWP is configured based on at least one of: the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when both a downlink (DL) BWP and a DL MBS BWP are activated; the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when the DL BWP is activated and the DL MBS BWP is not activated; the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated, when the DL BWP is not activated and the DL MBS BWP is activated; or the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is also activated, when both the DL BWP and the DL MBS BWP are activated.

In still another embodiment, a method performed by a wireless communication node is disclosed. The method comprises: receiving, from a wireless communication device, a physical uplink control channel (PUCCH) based on a closed-loop power control mode. The closed-loop power control mode is selected, based on a semi-static configuration by the wireless communication node or based on a system pre-definition, from a plurality of closed-loop power control modes according to a type of the PUCCH. The type of the PUCCH is determined among a plurality of PUCCH types.

In a different embodiment, a wireless communication node configured to carry out a disclosed method in some embodiment is disclosed. In yet another embodiment, a wireless communication device configured to carry out a disclosed method in some embodiment is disclosed. In still another embodiment, a non-transitory computer-readable medium having stored thereon computer-executable instructions for carrying out a disclosed method in some embodiment is disclosed.

BRIEF DESCRIPTION OF THE DRAWINGS

Various exemplary embodiments of the present disclosure are described in detail below with reference to the following Figures. The drawings are provided for purposes of illustration only and merely depict exemplary embodiments of the present disclosure to facilitate the reader's understanding of the present disclosure. Therefore, the drawings should not be considered limiting of the breadth, scope, or applicability of the present disclosure. It should be noted that for clarity and ease of illustration these drawings are not necessarily drawn to scale.

FIG. 1 illustrates an exemplary communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure.

FIG. 2 illustrates a block diagram of a base station (BS) , in accordance with some embodiments of the present disclosure.

FIG. 3A illustrates a flow chart for a method performed by a BS for multicast or broadcast service (MBS) transmission, in accordance with some embodiments of the present disclosure.

FIG. 3B illustrates a flow chart for another method performed by a BS for power control, in accordance with some embodiments of the present disclosure.

FIG. 4 illustrates a block diagram of a user equipment (UE) , in accordance with some embodiments of the present disclosure.

FIG. 5A illustrates a flow chart for a method performed by a UE for MBS transmission, in accordance with some embodiments of the present disclosure.

FIG. 5B illustrates a flow chart for another method performed by a UE for power control, in accordance with some embodiments of the present disclosure.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Various exemplary embodiments of the present disclosure are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present disclosure. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the specific order and/or hierarchy of steps in the methods disclosed herein are merely exemplary approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present disclosure. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present disclosure is not limited to the specific order or hierarchy presented unless expressly stated otherwise.

A typical wireless communication network includes one or more base stations (typically known as a “BS” ) that each provides geographical radio coverage, and one or more wireless user equipment devices (typically known as a “UE” ) that can transmit and receive data within the radio coverage. In the wireless communication network, a BS and a UE can communicate with each other via a communication link, e.g., via a downlink (DL) radio frame from the BS to the UE or via an uplink (UL) radio frame from the UE to the BS.

The present disclosure provides methods and systems for wireless transmissions under a multicast or broadcast service (MBS) mode. Under the MBS mode, the same transmission mechanism will be used by the network node (e.g. a base station) for transmitting the same information to a group of UEs. The MBS transmission can be carried on a physical downlink shared channel (PDSCH) which is received by the group of UEs. The PDSCH carrying multicast transport blocks can be called as a group-common PDSCH or MBS PDSCH. The base station can schedule the MBS PDSCH based on either the UE-specific DCI oriented to a single UE or the group DCI oriented to a group of UEs. No matter which type of downlink control information (DCI) is used to schedule the MBS PDSCH, the frequency domain resource allocation (FDRA) field in the DCI can indicate the frequency domain resources used by the MBS PDSCH.

The base station can know the downlink CSI in the frequency domain resource range used for the MBS transmission based on a CSI report sent by the UE. The base station can also know the downlink CSI in the frequency domain resource range used for MBS transmission by receiving a sounding reference signal (SRS) sent by the UE and using the channel reciprocity. In order for the base station to know whether the MBS transmission is correctly received by the UE, the UE can send a hybrid automatic repeat request (HARQ) feedback of the corresponding MBS transmission to the base station, so as to inform the base station whether the UE has correctly received a MBS PDSCH transport block. The HARQ feedback can be in the form of acknowledgement -negative acknowledgement (ACK-NACK) feedback or NACK-only feedback. The ACK-NACK feedback means that the UE feeds back different values on the physical uplink control channel (PUCCH) resource corresponding to ACK and NACK. For example, “1” indicates that the MBS PDSCH transport block is not successfully received, i.e. NACK; and “0” indicates that the MBS PDSCH transport block is successfully received, i.e. ACK. The NACK-only feedback means that the UE sends a feedback on the PUCCH resource only when the UE fails to receive the message successfully, i.e. NACK.

The methods disclosed in the present teaching can be implemented in a wireless communication network, where a BS and a UE can communicate with each other via a communication link, e.g., via a downlink radio frame from the BS to the UE or via an uplink radio frame from the UE to the BS. In various embodiments, a BS in the present disclosure can be referred to as a network side and can include, or be implemented as, a next Generation Node B (gNB or gNodeB) , an E-UTRAN Node B (eNB or eNodeB) , a Transmission/Reception Point (TRP) , an Access Point (AP) , an AP MLD, a non-terrestrial reception point for satellite/fire balloon/unmanned aerial vehicle (UAV) communication, a radio transceiver in a vehicle of a vehicle-to-vehicle (V2V) wireless network, etc.; while a UE in the present disclosure can be referred to as a terminal and can include, or be implemented as, a mobile station (MS) , a station (STA) , a non-AP MLD, a terrestrial device for satellite/fire balloon/unmanned aerial vehicle (UAV) communication, a radio transceiver in a vehicle of a vehicle-to-vehicle (V2V) wireless network, etc.

In various embodiments of the present teaching, the two ends of a communication, e.g., a BS and a UE, may be described herein as non-limiting examples of “wireless communication node, ” and “wireless communication device” respectively, which can practice the methods disclosed herein and may be capable of wireless and/or wired communications, in accordance with various embodiments of the present disclosure.

FIG. 1 illustrates an exemplary communication network 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. As shown in FIG. 1, the exemplary communication network 100 includes a base station (BS) 101 and a plurality of UEs, UE 1 110, UE 2 120 …UE 3 130, where the BS 101 can communicate with the UEs according to wireless protocols. The BS 101 may perform a multicast or broadcast service (MBS) transmission to a group of UEs, e.g. the UE 1 110, UE 2 120, and UE 3 130, by transmitting a MBS PDSCH to the group of UEs. The present teaching provides methods to indicate frequency domain resource in MBS PDSCH scheduling, so that the group of UEs receiving this MBS PDSCH can understand the physical resource blocks (PRBs) occupied by the MBS PDSCH consistently. Based on the methods disclosed herein, the UEs can better support PUCCH and SRS transmission, so that they can know the frequency-domain locations where PUCCHs and SRSs should be sent, and can identify the transmission power of different types of PUCCHs, thus ensuring PUCCH transmission reliability.

FIG. 2 illustrates a block diagram of a base station (BS) 200, in accordance with some embodiments of the present disclosure. The BS 200 is an example of a node or device that can be configured to implement the various methods described herein. As shown in FIG. 2, the BS 200 includes a housing 240 containing a system clock 202, a processor 204, a memory 206, a transceiver 210 comprising a transmitter 212 and receiver 214, a power module 208, a downlink transmission configurator 220, a downlink control information generator 222, an active BWP configurator 224, and an uplink signal analyzer 226.

In this embodiment, the system clock 202 provides the timing signals to the processor 204 for controlling the timing of all operations of the BS 200. The processor 204 controls the general operation of the BS 200 and can include one or more processing circuits or modules such as a central processing unit (CPU) and/or any combination of general-purpose microprocessors, microcontrollers, digital signal processors (DSPs) , field programmable gate array (FPGAs) , programmable logic devices (PLDs) , controllers, state machines, gated logic, discrete hardware components, dedicated hardware finite state machines, or any other suitable circuits, devices and/or structures that can perform calculations or other manipulations of data.

The memory 206, which can include both read-only memory (ROM) and random access memory (RAM) , can provide instructions and data to the processor 204. A portion of the memory 206 can also include non-volatile random access memory (NVRAM) . The processor 204 typically performs logical and arithmetic operations based on program instructions stored within the memory 206. The instructions (a.k.a., software) stored in the memory 206 can be executed by the processor 204 to perform the methods described herein. The processor 204 and memory 206 together form a processing system that stores and executes software. As used herein, “software” means any type of instructions, whether referred to as software, firmware, middleware, microcode, etc., which can configure a machine or device to perform one or more desired functions or processes. Instructions can include code (e.g., in source code format, binary code format, executable code format, or any other suitable format of code) . The instructions, when executed by the one or more processors, cause the processing system to perform the various functions described herein.

The transceiver 210, which includes the transmitter 212 and receiver 214, allows the BS 200 to transmit and receive data to and from a remote device (e.g., a UE or another BS) . An antenna 250 is typically attached to the housing 240 and electrically coupled to the transceiver 210. In various embodiments, the BS 200 includes (not shown) multiple transmitters, multiple receivers, and multiple transceivers. In one embodiment, the antenna 250 is replaced with a multi-antenna array 250 that can form a plurality of beams each of which points in a distinct direction. The transmitter 212 can be configured to wirelessly transmit packets having different packet types or functions, such packets being generated by the processor 204. Similarly, the receiver 214 is configured to receive packets having different packet types or functions, and the processor 204 is configured to process packets of a plurality of different packet types. For example, the processor 204 can be configured to determine the type of packet and to process the packet and/or fields of the packet accordingly.

In a wireless communication, the downlink transmission configurator 220 in the BS 200 can generate a configuration indicating a granularity for frequency domain resource related to multicast or broadcast service (MBS) transmission to a group of UEs. The downlink transmission configurator 220 may determine the granularity based on a frequency domain resource range for the MBS transmission, and may determine the frequency domain resource related to the MBS transmission based on the granularity. Then, the downlink transmission configurator 220 can transmit, via the transmitter 212 to a UE in the group, the configuration indicating the granularity.

In various embodiments, the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs. The granularity for frequency domain resource corresponds to a resource block group (RBG) size, which is a second number of PRBs contained in each RBG, for scheduling a MBS physical downlink shared channel (PDSCH) for the UE. The second number is adapted according to the first number. For example, the second number increases as the first number increases. That is, a larger frequency domain resource range may correspond to a larger RBG size or a larger granularity for frequency domain resource.

In various embodiments, the downlink control information generator 222 in this example can generate a downlink control information (DCI) for scheduling the MBS PDSCH. In one embodiment, the downlink control information generator 222 generates and transmits, via the transmitter 212 to the UE, a UE-specific DCI directed specific to the UE for scheduling the MBS PDSCH. A frequency domain resource allocation (FDRA) field in the UE-specific DCI indicates, based on the RBG size corresponding to the MBS PRB set, allocation of frequency domain resources within at least one of: the MBS PRB set, or a downlink (DL) bandwidth part (BWP) comprising the MBS PRB set. In some embodiments, a RBG size corresponding to the MBS PRB set may be smaller than a RBG size corresponding to the DL BWP.

In some embodiments, the downlink control information generator 222 generates and transmits, via the transmitter 212 to the UE, a group-common DCI directed to the group of UEs including the UE. While the MBS PDSCH is scheduled by the group-common DCI, a frequency domain resource allocation (FDRA) field in the group-common DCI can indicate allocation of frequency domain resources within the MBS PRB set based on the RBG size corresponding to the MBS PRB set.

In some embodiments, while the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs, the granularity corresponds to a subband size, which is a second number of PRBs contained in each subband, for determining channel state information (CSI) on the MBS PRB set by the UE. The second number is adapted according to the first number. For example, the second number increases as the first number increases. That is, a larger frequency domain resource range may correspond to a larger subband size or a larger granularity for CSI measurement and report by the UE.

In some embodiments, the MBS PRB set is a subset of a downlink (DL) bandwidth part (BWP) configured by the BS 200 for the UE. In some embodiments, the subband size is included in a CSI report configuration transmitted from the BS 200 to the UE, and may be configured as one of at least three candidate values. The at least three candidate values include: at least two subband size values corresponding to the DL BWP, and at least one subband size value corresponding to the MBS PRB set.

In various embodiments, the subband size is configured as a subband size value corresponding to a bandwidth, which is at least one of the MBS PRB set or the DL BWP. The CSI report configuration comprises a bitmap corresponding to all subbands within the bandwidth, e.g. all subbands of the MBS PRB set or all subbands of the DL BWP. Each bit in the bitmap corresponds to a subband within the bandwidth and indicates whether the UE should report CSI with respect to the corresponding subband. The CSI report configuration may also comprise a bandwidth type indication to indicate whether the CSI report should include one CSI for the entire bandwidth or multiple CSI for multiple subbands within the entire bandwidth.

In various embodiments, the active BWP configurator 224 in this example can determine or configure, for a UE, at least one activated bandwidth part (BWP) for uplink transmission from the UE to the BS 200. The UE may be configured with one or more uplink (UL) bandwidth parts (BWPs) and a UL multicast or broadcast service (MBS) BWP. In various embodiments, the at least one activated BWP is configured based on at least one of the following manners. First, one of the UL BWPs is activated for uplink transmission of the UE and the UL MBS BWP is not activated, when both a downlink (DL) BWP and a DL MBS BWP are activated. Second, one of the UL BWPs is activated for uplink transmission of the UE and the UL MBS BWP is not activated, when the DL BWP is activated and the DL MBS BWP is not activated. Third, the UL MBS BWP is activated for uplink transmission of the UE and none of the UL BWPs is activated, when the DL BWP is not activated and the DL MBS BWP is activated. Fourth, one of the UL BWPs is activated for uplink transmission of the UE and the UL MBS BWP is also activated, when both the DL BWP and the DL MBS BWP are activated.

In some embodiments, when both the UL BWP and the UL MBS BWP are activated, for a PUCCH that carries a HARQ feedback corresponding to a PDSCH, the PUCCH is determined to be transmitted on one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the BS 200 or based on a system pre-definition, according to at least one of the following manners. First, when the PDSCH is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, the PUCCH is transmitted on the UL BWP. Second, when the PDSCH is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH, the PUCCH is transmitted on the UL MBS BWP. Third, the PUCCH is always transmitted on the UL BWP. Fourth, a PUCCH carrying a negative acknowledgement only (NACK-only) feedback is always transmitted on the UL MBS BWP.

In some embodiments, when both the UL BWP and the UL MBS BWP are activated, for a PUCCH that carries a channel state information (CSI) report, the PUCCH is determined to be transmitted on one of the UL BWP or the UL MBS BWP, according to at least one of the following manners. First, the CSI report is transmitted on the UL BWP, based on a semi-static configuration by the BS 200. Second, the CSI report is transmitted on the UL MBS BWP, based on a semi-static configuration by the BS. Third, the CSI report is always transmitted on the UL BWP, based on a system pre-definition. Fourth, the CSI report is always transmitted on the UL MBS BWP, based on a system pre-definition. Fifth, the CSI report is transmitted on the UL BWP or UL MBS BWP, depending to a type of the CSI report. For example, a first type of CSI report is transmitted on the UL BWP, and a second type of CSI report is transmitted on the UL MBS BWP.

In some embodiments, when both the UL BWP and the UL MBS BWP are activated, an aperiodic sounding reference signal (SRS) is determined to be transmitted on one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the BS 200 or based on a system pre-definition, according to at least one of the following manners: an aperiodic SRS triggered by a UL grant is transmitted on the UL BWP scheduled by the UL grant; an aperiodic SRS triggered by a first DL grant is transmitted on the UL BWP, when a PDSCH scheduled by the first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH; an aperiodic SRS triggered by a second DL grant is transmitted on the UL MBS BWP, when a PDSCH scheduled by the second DL grant is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH; an aperiodic SRS triggered by a third DL grant is transmitted on one of the UL BWP or the UL MBS BWP, according to an indication of a field in the third DL grant; an aperiodic SRS triggered by a fourth DL grant is transmitted on the UL BWP, when a PDCCH carrying the fourth DL grant is transmitted on the DL BWP or a BWP indication field in the fourth DL grant indicates DL BWP; an aperiodic SRS triggered by a fifth DL grant is transmitted on the UL MBS BWP, when a PDCCH carrying the fifth DL grant is transmitted on the DL MBS BWP or a BWP indication field in the fifth DL grant indicates DL MBS BWP; an aperiodic SRS triggered by a group-common DCI is transmitted on the UL BWP; or an aperiodic SRS triggered by a group-common DCI is transmitted on the UL MBS BWP.

In some embodiments, a UL grant means a DCI that is used for scheduling a UL transmission. In some embodiments, a DL grant means a DCI that is used for scheduling a DL transmission.

In some embodiments, the uplink signal analyzer 226 in this example can receive, via the receiver 214 from a UE, a PUCCH based on a closed-loop power control mode. The closed- loop power control mode is selected, based on a semi-static configuration by the BS 200 or based on a system pre-definition, from a plurality of closed-loop power control modes according to a type of the PUCCH. The type of the PUCCH is determined among a plurality of PUCCH types, which may be different in terms of at least one of the following manners. First, each of the plurality of PUCCH types is used to carry a HARQ feedback corresponding to a PDSCH with a different MBS priority. Second, each of the plurality of PUCCH types is used to carry a HARQ feedback corresponding to a PDSCH with a different MBS service type. Third, each of the plurality of PUCCH types is used to carry a HARQ feedback having one of a plurality of different feedback types. The plurality of different feedback types include at least one of: HARQ acknowledgement (HARQ-ACK) feedback, HARQ-ACK feedback for MBS PDSCH, HARQ-ACK feedback for unicast PDSCH, negative acknowledgement only (NACK-only) feedback, or NACK-only feedback for MBS PDSCH.

In some embodiments, the plurality of closed-loop power control modes are different in terms of at least one of the following manners: the plurality of closed-loop power control modes correspond to independent power control sets for different PUCCH types; the plurality of closed-loop power control modes correspond to different power control levels for different PUCCH types, wherein the different power control levels are elements of a same power control set; the plurality of closed-loop power control modes correspond to an absolute closed-loop power control and an accumulative closed-loop power control for different PUCCH types; or the plurality of closed-loop power control modes correspond to a closed-loop power control and a no closed-loop power control for different PUCCH types.

In some embodiments, the downlink control information generator 222 may generate and transmit, via the transmitter 212 to the UE, a group-common DCI for PUCCH closed-loop power control. The group-common DCI includes a single type-indication field indicating a PUCCH type. All transmit power control (TPC) values carried in the group-common DCI indicate power control adjustments for the PUCCH type.

In some embodiments, the downlink control information generator 222 may generate and transmit, via the transmitter 212 to the UE, a group-common DCI for PUCCH closed-loop power control, wherein the group-common DCI includes a plurality of type-indication fields. Each of the plurality of type-indication fields indicates a PUCCH type corresponding to a TPC value carried in a block, where the type-indication field is located, in the group-common DCI. When a certain block contains no type-indication field, a TPC value carried in the certain block indicates a power control adjustment for a default PUCCH type. The default PUCCH type is determined based on a semi-static configuration by the BS 200 or based on a system pre-definition.

The power module 208 can include a power source such as one or more batteries, and a power regulator, to provide regulated power to each of the above-described modules in FIG. 2. In some embodiments, if the BS 200 is coupled to a dedicated external power source (e.g., a wall electrical outlet) , the power module 208 can include a transformer and a power regulator.

The various modules discussed above are coupled together by a bus system 230. The bus system 230 can include a data bus and, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It is understood that the modules of the BS 200 can be operatively coupled to one another using any suitable techniques and mediums.

Although a number of separate modules or components are illustrated in FIG. 2, persons of ordinary skill in the art will understand that one or more of the modules can be combined or commonly implemented. For example, the processor 204 can implement not only the functionality described above with respect to the processor 204, but also implement the functionality described above with respect to the downlink transmission configurator 220. Conversely, each of the modules illustrated in FIG. 2 can be implemented using a plurality of separate components or elements.

FIG. 3A illustrates a flow chart for a method 310 performed by a BS, e.g. the BS 200 in FIG. 2, for multicast or broadcast service (MBS) transmission, in accordance with some embodiments of the present disclosure. At operation 311, the BS determines a frequency domain resource range and a granularity for frequency domain resource related to multicast or broadcast service (MBS) transmission to a UE. At operation 312, the BS generates a configuration indicating the granularity for frequency domain resource related to MBS transmission. At operation 313, the BS transmits the configuration to the UE. The order of the operations shown in FIG. 3A may be changed according to different embodiments of the present disclosure.

FIG. 3B illustrates a flow chart for another method 320 performed by a BS, e.g. the BS 200 in FIG. 2, for power control, in accordance with some embodiments of the present disclosure. At operation 321, the BS generates a semi-static configuration for a UE to select one of multiple closed-loop power control modes according to a type of a physical uplink control channel (PUCCH) . At operation 322, the BS receives, from the UE, the PUCCH based on the selected closed-loop power control mode. The order of the operations shown in FIG. 3B may be changed according to different embodiments of the present disclosure.

FIG. 4 illustrates a block diagram of a UE 400, in accordance with some embodiments of the present disclosure. The UE 400 is an example of a device that can be configured to implement the various methods described herein. As shown in FIG. 4, the UE 400 includes a housing 440 containing a system clock 402, a processor 404, a memory 406, a transceiver 410 comprising a transmitter 412 and a receiver 414, a power module 408, a resource determiner 420, a downlink control information analyzer 422, an active BWP determiner 424, and a power control mode selector 426.

In this embodiment, the system clock 402, the processor 404, the memory 406, the transceiver 410 and the power module 408 work similarly to the system clock 202, the processor 204, the memory 206, the transceiver 210 and the power module 208 in the BS 200. An antenna 450 or a multi-antenna array 450 is typically attached to the housing 440 and electrically coupled to the transceiver 410.

The resource determiner 420 in this example may receive, via the receiver 414 from a BS, a configuration indicating a granularity for frequency domain resource related to multicast or broadcast service (MBS) transmission to a group of UEs including the UE 400. The granularity is determined based on a frequency domain resource range for the MBS transmission. The resource determiner 420 may analyze the configuration to determine the frequency domain resource related to the MBS transmission based on the granularity.

In various embodiments, the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs. The granularity for frequency domain resource corresponds to a resource block group (RBG) size, which is a second number of PRBs contained in each RBG, for scheduling a MBS physical downlink shared channel (PDSCH) for the UE 400. The second number is adapted according to the first number. For example, the second number increases as the first number increases. That is, a larger frequency domain resource range may correspond to a larger RBG size or a larger granularity for frequency domain resource.

In various embodiments, the downlink control information analyzer 422 in this example can receive, via the receiver 414 from the BS, and analyze a downlink control information (DCI) for scheduling the MBS PDSCH. In one embodiment, the downlink control information analyzer 422 determines that the DCI is a UE-specific DCI directed specific to the UE 400 for scheduling the MBS PDSCH. The downlink control information analyzer 422 may parse a frequency domain resource allocation (FDRA) field in the UE-specific DCI to determine, based on the RBG size corresponding to the MBS PRB set, allocation of frequency domain resources within at least one of: the MBS PRB set, or a downlink (DL) bandwidth part (BWP) comprising the MBS PRB set. In some embodiments, a RBG size corresponding to the MBS PRB set may be smaller than a RBG size corresponding to the DL BWP.

In some embodiments, the downlink control information analyzer 422 can receive, via the receiver 414 from the BS, and analyze a group-common DCI directed to the group of UEs including the UE 400. In one embodiment, the downlink control information analyzer 422 determines that the DCI is a group-common DCI for scheduling the MBS PDSCH. The downlink control information analyzer 422 may parse a frequency domain resource allocation (FDRA) field in the group-common DCI to determine allocation of frequency domain resources within the MBS PRB set based on the RBG size corresponding to the MBS PRB set.

In some embodiments, while the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs, the granularity corresponds to a subband size, which is a second number of PRBs contained in each subband, for determining channel state information (CSI) on the MBS PRB set by the UE 400. The second number is adapted according to the first number. For example, the second number increases as the first number increases. That is, a larger frequency domain resource range may correspond to a larger subband size or a larger granularity for CSI measurement and report by the UE 400.

In some embodiments, the MBS PRB set is a subset of a downlink (DL) bandwidth part (BWP) configured by the BS for the UE 400. In some embodiments, the subband size is included in a CSI report configuration transmitted from the BS to the UE 400, and may be configured as one of at least three candidate values. The at least three candidate values include: at least two subband size values corresponding to the DL BWP, and at least one subband size value corresponding to the MBS PRB set.

In various embodiments, the subband size is configured as a subband size value corresponding to a bandwidth, which is at least one of the MBS PRB set or the DL BWP. The CSI report configuration comprises a bitmap corresponding to all subbands within the bandwidth, e.g. all subbands of the MBS PRB set or all subbands of the DL BWP. Each bit in the bitmap corresponds to a subband within the bandwidth and indicates whether the UE 400 should report CSI with respect to the corresponding subband. The CSI report configuration may also comprise a bandwidth type indication to indicate whether the CSI report should include one CSI for the entire bandwidth or multiple CSI for multiple subbands within the entire bandwidth.

In various embodiments, the active BWP determiner 424 in this example can determine at least one activated bandwidth part (BWP) for uplink transmission from the UE 400 to a BS. The UE 400 may be configured with one or more uplink (UL) bandwidth parts (BWPs) and a UL multicast or broadcast service (MBS) BWP. In various embodiments, the active BWP determiner 424 determines the at least one activated BWP based on at least one of the following manners. First, one of the UL BWPs is activated for uplink transmission of the UE 400 and the UL MBS BWP is not activated, when both a downlink (DL) BWP and a DL MBS BWP are activated. Second, one of the UL BWPs is activated for uplink transmission of the UE 400 and the UL MBS BWP is not activated, when the DL BWP is activated and the DL MBS BWP is not activated. Third, the UL MBS BWP is activated for uplink transmission of the UE 400 and none of the UL BWPs is activated, when the DL BWP is not activated and the DL MBS BWP is activated. Fourth, one of the UL BWPs is activated for uplink transmission of the UE 400 and the UL MBS BWP is also activated, when both the DL BWP and the DL MBS BWP are activated

In some embodiments, when both the UL BWP and the UL MBS BWP are activated, for a PUCCH that carries a HARQ feedback corresponding to a PDSCH, the PUCCH is determined to be transmitted on one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the BS or based on a system pre-definition, according to at least one of the following manners. First, when the PDSCH is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, the PUCCH is transmitted on the UL BWP. Second, when the PDSCH is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH, the PUCCH is transmitted on the UL MBS BWP. Third, the PUCCH is always transmitted on the UL BWP. Fourth, a PUCCH carrying a negative acknowledgement only (NACK-only) feedback is always transmitted on the UL MBS BWP.

In some embodiments, when both the UL BWP and the UL MBS BWP are activated, for a PUCCH that carries a channel state information (CSI) report, the PUCCH is determined to be transmitted on one of the UL BWP or the UL MBS BWP, according to at least one of the following manners. First, the CSI report is transmitted on the UL BWP, based on a semi-static configuration by the BS. Second, the CSI report is transmitted on the UL MBS BWP, based on a semi-static configuration by the BS. Third, the CSI report is always transmitted on the UL BWP, based on a system pre-definition. Fourth, the CSI report is always transmitted on the UL MBS BWP, based on a system pre-definition. Fifth, the CSI report is transmitted on the UL BWP or UL MBS BWP, depending to a type of the CSI report. For example, a first type of CSI report is transmitted on the UL BWP, and a second type of CSI report is transmitted on the UL MBS BWP.

In some embodiments, when both the UL BWP and the UL MBS BWP are activated, an aperiodic sounding reference signal (SRS) is determined to be transmitted on one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the BS or based on a system pre-definition, according to at least one of the following manners: an aperiodic SRS triggered by a UL grant is transmitted on the UL BWP scheduled by the UL grant; an aperiodic SRS triggered by a first DL grant is transmitted on the UL BWP, when a PDSCH scheduled by the first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH; an aperiodic SRS triggered by a second DL grant is transmitted on the UL MBS BWP, when a PDSCH scheduled by the second DL grant is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH; an aperiodic SRS triggered by a third DL grant is transmitted on one of the UL BWP or the UL MBS BWP, according to an indication of a field in the third DL grant; an aperiodic SRS triggered by a fourth DL grant is transmitted on the UL BWP, when a PDCCH carrying the fourth DL grant is transmitted on the DL BWP or a BWP indication field in the fourth DL grant indicates DL BWP; an aperiodic SRS triggered by a fifth DL grant is transmitted on the UL MBS BWP, when a PDCCH carrying the fifth DL grant is transmitted on the DL MBS BWP or a BWP indication field in the fifth DL grant indicates DL MBS BWP; an aperiodic SRS triggered by a group-common DCI is transmitted on the UL BWP; or an aperiodic SRS triggered by a group-common DCI is transmitted on the UL MBS BWP.

In some embodiments, the power control mode selector 426 in this example can determine a type of a PUCCH among a plurality of PUCCH types; select, based on a semi-static configuration by a BS or based on a system pre-definition, one of a plurality of closed-loop power control modes according to the determined type; and transmit, via the transmitter 412 to the BS, the PUCCH based on the selected closed-loop power control mode.

In some embodiments, the plurality of PUCCH types may be different in terms of at least one of the following manners. First, each of the plurality of PUCCH types is used to carry a HARQ feedback corresponding to a PDSCH with a different MBS priority. Second, each of the plurality of PUCCH types is used to carry a HARQ feedback corresponding to a PDSCH with a different MBS service type. Third, each of the plurality of PUCCH types is used to carry a HARQ feedback having one of a plurality of different feedback types. The plurality of different feedback types include at least one of: HARQ acknowledgement (HARQ-ACK) feedback, HARQ-ACK feedback for MBS PDSCH, HARQ-ACK feedback for unicast PDSCH, negative acknowledgement only (NACK-only) feedback, or NACK-only feedback for MBS PDSCH.

In some embodiments, the plurality of closed-loop power control modes may be different in terms of at least one of the following manners: the plurality of closed-loop power control modes correspond to independent power control sets for different PUCCH types; the plurality of closed-loop power control modes correspond to different power control levels for different PUCCH types, wherein the different power control levels are elements of a same power control set; the plurality of closed-loop power control modes correspond to an absolute closed-loop power control and an accumulative closed-loop power control for different PUCCH types; or the plurality of closed-loop power control modes correspond to a closed-loop power control and a no closed-loop power control for different PUCCH types.

In some embodiments, the downlink control information analyzer 422 may receive, via the receiver 414 from the BS, and analyze a group-common DCI for PUCCH closed-loop power control. The group-common DCI includes a single type-indication field indicating a PUCCH type. All transmit power control (TPC) values carried in the group-common DCI indicate power control adjustments for the PUCCH type.

In some embodiments, the downlink control information generator 222 may receive, via the receiver 414 from the BS, and analyze a group-common DCI for PUCCH closed-loop power control, wherein the group-common DCI includes a plurality of type-indication fields. Each of the plurality of type-indication fields indicates a PUCCH type corresponding to a TPC value carried in a block, where the type-indication field is located, in the group-common DCI. When a certain block contains no type-indication field, a TPC value carried in the certain block indicates a power control adjustment for a default PUCCH type. The default PUCCH type is determined based on a semi-static configuration by the BS or based on a system pre-definition.

The various modules discussed above are coupled together by a bus system 430. The bus system 430 can include a data bus and, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It is understood that the modules of the UE 400 can be operatively coupled to one another using any suitable techniques and mediums.

Although a number of separate modules or components are illustrated in FIG. 4, persons of ordinary skill in the art will understand that one or more of the modules can be combined or commonly implemented. For example, the processor 404 can implement not only the functionality described above with respect to the processor 404, but also implement the functionality described above with respect to the resource determiner 420. Conversely, each of the modules illustrated in FIG. 4 can be implemented using a plurality of separate components or elements.

FIG. 5A illustrates a flow chart for a method 510 performed by a UE, e.g. the UE 400 in FIG. 4, for MBS transmission, , in accordance with some embodiments of the present disclosure. At operation 511, the UE receives, from a BS, a configuration indicating a granularity for frequency domain resource related to MBS transmission to the UE. At operation 512, the UE determines the frequency domain resource related to the MBS transmission based on the granularity. The order of the operations shown in FIG. 5A may be changed according to different embodiments of the present disclosure.

FIG. 5B illustrates a flow chart for another method 520 performed by a UE, e.g. the UE 400 in FIG. 4, for power control, in accordance with some embodiments of the present disclosure. At operation 521, the UE determines a type of a physical uplink control channel (PUCCH) among a plurality of PUCCH types. At operation 522, the UE selects, based on a semi-static configuration by a BS or based on a system pre-definition, one of multiple closed-loop power control modes according to the determined type. At operation 523, the UE transmits, to the BS, the PUCCH based on the selected closed-loop power control mode. The order of the operations shown in FIG. 5B may be changed according to different embodiments of the present disclosure.

Different embodiments of the present disclosure will now be described in detail hereinafter. It is noted that the features of the embodiments and examples in the present disclosure may be combined with each other in any manner without conflict.

A first embodiment describes how to configure MBS RBG size. In this embodiment, the base station (BS) , e.g. the gNodeB, not only configures the frequency domain resource range (or MBS PRB set) for MBS transmission for a user equipment (UE) , but also configures the RBG size for scheduling the MBS PDSCH for the UE through RRC signaling. The RBG size is the number of PRBs contained in a RBG.

When the BS schedules MBS transmission using a UE-specific DCI, the BS will use the FDRA domain in the UE-specific DCI to indicate the allocation of frequency domain resources within the MBS PRB set or within an entire DL BWP comprising the MBS PRB set. When RBG is used as the granularity of frequency domain resource allocation, the BS will use the RBG adapted to the MBS PRB set as the granularity to construct the specific indication value of the FDRA domain. Accordingly, after receiving the UE-specific DCI, if the UE identifies that the UE-specific DCI schedules the MBS PDSCH, the UE resolves the FDRA domain in the UE-specific DCI based on the MBS PRB set. Further, if the BS instructs the UE to use RBGs as the allocation granularity of MBS PDSCH frequency domain resources, the UE may parse the FDRA domain of the UE-specific DCI using RBGs that match the MBS PRB set. For example, a larger MBS PRB set having more PRBs may correspond to a larger RBG size.

In one example, whether the allocation of frequency domain resources indicated by the UE-specific DCI is within the MBS PRB set or within the entire DL BWP depends on whether the UE-specific DCI schedules a unicast transmission or a MBS transmission. The allocation of frequency domain resources indicated by the UE-specific DCI is within the MBS PRB set when the UE-specific DCI schedules a MBS transmission; and the allocation of frequency domain resources indicated by the UE-specific DCI is within the entire DL BWP when the UE-specific DCI schedules a unicast transmission. In another example, the allocation of frequency domain resources indicated by the UE-specific DCI is always within the entire DL BWP. But in either example, the RBG sizes corresponding to the unicast transmission and the MBS transmission may be different.

When the BS schedules MBS transmission using a group-common DCI, the BS uses the FDRA domain in the group-common DCI to indicate the allocation of frequency domain resources within the MBS PRB set. If RBG is used as the granularity of frequency domain resource allocation, the BS will use the RBG adapted to MBS PRB set as the granularity to construct the specific indication value of the FDRA domain. Accordingly, after receiving the group-common DCI, if the UE identifies the group-common DCI scheduling MBS PDSCH, the UE resolves the FDRA domain in the group-common DCI based on MBS PRB set. Further, if the BS instructs the UE to use RBG as the allocation granularity of MBS PDSCH frequency domain resources, the UE may parse the FDRA domain of the group-common DCI using RBG that is adapted to MBS PRB set. For example, a RBG size adapted to the MBS PRB set may be smaller than a RBG size adapted to the entire DL BWP.

The MBS PRB set may be semi-statically configured for the UE by the BS. The MBS PRB set can include part of the PRBs on a DL BWP, or can be a complete DL BWP dedicated to MBS transmission.

A second embodiment describes how to determine CSI report sub-band by a UE. In this embodiment, the BS not only configures the frequency domain resource range (or MBS PRB set) for MBS transmission for the UE, but also configures a sub-band size (or MBS sub-band size) for CSI on the MBS PRB set for the UE, through RRC signaling. The sub-band size is the number of PRBs contained in the sub-band.

The BS configures, through RRC signaling, at least one CSI report configuration for the UE to obtain CSI on the MBS PRB set. The CSI report configuration contains a series of parameter configurations related to CSI feedback. This configuration may contain CSI report frequency domain range configuration, which may include sub-band size configuration and/or csi-ReportingBand configuration.

When the MBS PRB set is a subset of the DL BWP configured by the BS to the UE, in the CSI report configuration used for determining CSI on the MBS PRB set, a sub-band size is configured as one of at least n candidate values, where n is an integer equal to or greater than 2. For example, the n candidate values may include one or two sub-band size values corresponding to the DL BWP and a MBS sub-band size corresponding to the MBS PRB set.

When the sub-band size in the CSI report configuration configured by the BS is a MBS sub-band size corresponding to MBS PRB set, the csi-ReportingBand configuration included in the CSI report configuration is for the range of the MBS PRB set, not for the entire range of the DL BWP comprising the MBS PRB set. In one example, the csi-ReportingBand is a bitmap, where each bit of the bitmap corresponds to a MBS sub-band, indicating whether the UE is required to measure and/or feed back CSI with respect to the corresponding MBS sub-band. A broadband or sub-band indication may be contained in the CSI report configuration. When the indication indicates broadband, it indicates the UE to feed back one CSI for the entire MBS PRB set range, not for the entire DL BWP range. When the indication indicates sub-band, it indicates the UE to feed back one CSI for each MBS sub-band indicated by the bitmap for CSI feedback, within the MBS PRB set.

When the sub-band size in the CSI report configuration is a sub-band size value corresponding to the DL BWP, the csi-ReportingBand configuration included in the CSI report configuration is for the entire DL BWP range. The csi-ReportingBand is a bitmap, where each bit of the bitmap corresponds to a sub-band, indicating whether the UE is required to measure and/or feed back CSI with respect to the corresponding sub-band. A broadband or sub-band indication may be contained in the CSI report configuration. When the indication indicates broadband, it indicates the UE to feed back one CSI for the entire DL BWP range. When the indication indicates sub-band, it indicates the UE to feed back one CSI for each sub-band indicated by the bitmap for CSI feedback.

A third embodiment describes how to configure UL BWP for a UE supporting MBS transmission. According to a first mode of the embodiment, the BS configures both UL BWP and UL MBS BWP for the UE, but the UL BWP and the UL MBS BWP will not be activated at the same time. The UL BWP and a DL BWP configured for transmitting unicast PDSCH form a BWP pair. The UL MBS BWP and a DL MBS BWP configured for transmitting MBS PDSCH form another BWP pair.

In one example, when both the DL BWP and the DL MBS BWP are activated, only UL BWP is activated for UL transmission, and the UL MBS BWP is not activated UL transmission. In another example, when the DL MBS BWP is not activated and the DL BWP is activated, the UL MBS BWP is not activated for UL transmission, but the UL BWP is activated for UL transmission. In another example, when the DL MBS BWP is activated and the DL BWP is not activated, the UL MBS BWP is activated for UL transmission and the UL BWP is not activated for UL transmission.

According to a second mode of the embodiment, the BS configures both UL BWP and UL MBS BWP for the UE, and the UL BWP and the UL MBS BWP can be activated at the same time. The UL BWP and a DL BWP configured for transmitting a unicast PDSCH form a BWP pair. The UL MBS BWP and a DL MBS BWP configured for transmitting a MBS PDSCH form another BWP pair. When both UL BWP and UL MBS BWP are activated, the UE may determine whether an uplink channel or signal is transmitted on the UL BWP or the UL MBS BWP.

In one example, for a PUCCH that carries HARQ-ACK or NACK-only feedback, based on a semi-static configuration by the BS or based on a system pre-definition, the UE may determine whether the PUCCH is transmitted on the UL BWP or the UL MBS BWP based on at least one of the following methods. In one method, the UE may determine whether to transmit the PUCCH on the UL BWP or the UL MBS BWP, according to the PDSCH corresponding to HARQ-ACK or NACK-only feedback. If the PDSCH is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, the PUCCH carrying the HARQ-ACK or NACK-only feedback is transmitted on the UL BWP. If the PDSCH is transmitted on the DL MBS BWP or the PDSCH is multicast PDSCH or the PDSCH is broadcast PDSCH, the PUCCH carrying the HARQ-ACK or NACK-only feedback is transmitted on the UL MBS BWP. In another method, the PUCCH carrying the HARQ-ACK or NACK-only feedback is always transmitted on the UL BWP. In yet another method, the PUCCH carrying the NACK-only feedback is always transmitted on the UL MBS BWP.

In another example, for a PUCCH carrying a CSI report, based on a semi-static configuration by the BS or based on a system pre-definition, the UE may determine whether the PUCCH is transmitted on the UL BWP or the UL MBS BWP based on at least one of the following methods. In one method, the BS semi-statically configures that the CSI report is transmitted on which BWP, where the CSI report can be configured to be transmitted on either UL BWP or UL MBS BWP. In another method, the CSI report is always transmitted on the UL BWP, and not on the UL MBS BWP. In this example, the CSI report may be a periodic CSI report or a semi-persistent CSI report.

In yet another example, for an aperiodic SRS, based on a semi-static configuration by the BS or based on a system pre-definition, the UE may determine whether the aperiodic SRS is transmitted on the UL BWP or the UL MBS BWP based on at least one of the following cases. In one case, an aperiodic SRS triggered by a UL Grant is sent on the UL BWP scheduled by the UL Grant.

In another case, an aperiodic SRS triggered by a DL Grant is transmitted on the UL BWP or the UL MBS BWP, depending on the PDSCH scheduled by the DL Grant. If the PDSCH is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, the aperiodic SRS is transmitted on the UL BWP. If the PDSCH is transmitted on the DL MBS BWP or the PDSCH is a multicast PDSCH or the PDSCH is a broadcast PDSCH, the aperiodic SRS is transmitted on the UL MBS BWP.

In another case, an aperiodic SRS triggered by a DL Grant is transmitted on the UL BWP or the UL MBS BWP, depending on the DL Grant. A field in the DL grant may indicate whether the aperiodic SRS triggered by the DL Grant is transmitted on the UL BWP or the UL MBS BWP. The field may have a length of 1 bit to indicate two states.

In one example, an aperiodic SRS triggered by a DL grant is transmitted on the UL BWP, when a PDCCH carrying the DL grant is transmitted on the DL BWP paired with the UL BWP, or when a BWP indication field in the DL grant indicates DL BWP. In another example, an aperiodic SRS triggered by a DL grant is transmitted on the UL MBS BWP, when a PDCCH carrying the DL grant is transmitted on the DL MBS BWP paired with the UL MBS BWP, or when a BWP indication field in the DL grant indicates DL MBS BWP.

In another case, an aperiodic SRS triggered by a group-common DCI, such as the aperiodic SRS triggered by DCI format 2_3, may be transmitted on the UL BWP, not on the UL MBS BWP.

A fourth embodiment describes how to determine PUCCH power control. For a UE that supports the MBS service, multiple closed-loop power control modes can be predefined by the system or semi-statically configured for the UE by the BS. The multiple closed-loop power control modes may be applicable to different types of PUCCHs, respectively. According to different examples, the various types of PUCCHs can be used to carry a HARQ-ACK feedback corresponding to PDSCHs with different MBS priorities; the various types of PUCCHs can be used to carry a HARQ-ACK feedback corresponding to PDSCHs with different MBS service types; and the various types of PUCCHs can also be used to carry different HARQ feedback types. At least one of the following HARQ feedback types can be provided: HARQ-ACK feedback, NACK-only feedback, HARQ-ACK feedback for MBS PDSCH, HARQ-ACK feedback for a corresponding unicast PDSCH, and NACK-only feedback for MBS PDSCH. The multiple closed-loop power control modes can be designed according to at least one of the following methods.

According to one method, a terminal maintains its own closed-loop power control modes independently for different types of PUCCHs. For example, a terminal maintains L1 mode closed-loop power control for PUCCH type 1; and maintains L2 mode closed-loop power control for PUCCH type 2. The L1 power control may include a power control set of {l=0} or {l=0, 1} . The L2 power control may include a power control set of {l=0} or {l=0, 1} . The L1 power control and L2 power control are performed independently, which means different power control sets and/or different power control levels can be used for different PUCCH types. The L1 and L2 closed-loop power controls can be applied to different PUCCH resources. The PUCCH type 1 and PUCCH type 2 may be transmitted on different PUCCH resources.

According to another method, a terminal maintains a shared closed-loop power control for different types of PUCCHs. For example, the L1 mode closed-loop power control is maintained for both PUCCH type 1 and PUCCH type 2. The L1 power control may include a power control set of {l= 0, 1} or {l=0, 1, 2} or {l=0, 1, 2, 3} . When L1 power control set is {l=0, 1}, PUCCH type 1 can use power level {l=0} for power control, and PUCCH type 2 can use power level {l=1} for power control. When L1 power control set is {l=0, 1, 2} , PUCCH type 1 can use power levels {l=0, 1} for power control, and PUCCH type 2 can use power level {l=2} for power control. When L1 power control set is {l=0, 1, 2, 3} , PUCCH type 1 can use power levels {l=0, 1} for power control, and PUCCH type 2 can use power levels {l=2, 3} for power control. The PUCCH type 1 and PUCCH type 2 can be transmitted on a same PUCCH resource or on different PUCCH resources.

According to another method, PUCCH type 1 uses an absolute closed-loop power control, while PUCCH type 2 uses an accumulative closed-loop power control. For example, PUCCH type 1 may be a PUCCH that carries NACK-only feedback. Furthermore, the PUCCH resource corresponding to PUCCH type 1 uses an absolute closed-loop power control; and the PUCCH resource corresponding to PUCCH type 2 uses an accumulative closed-loop power control.

According to another method, PUCCH type 1 does not support closed-loop power control, and only PUCCH type 2 supports closed-loop power control. For example, PUCCH type 1 may be a PUCCH that carries NACK-only feedback. Furthermore, the PUCCH resource corresponding to PUCCH type 1 does not support closed-loop power control, and the terminal may ignore the transmit power control (TPC) indication when transmitting PUCCH on these PUCCH resource. The PUCCH resource corresponding to PUCCH type 2 supports closed-loop power control.

For a group-common DCI sent by the BS for PUCCH closed-loop power control, such as DCI format 2_2, the BS may add one or more type-indication fields in the group-common DCI to indicate which the PUCCH type corresponds to the PUCCH closed-loop power control adjustment indicated in the group-common DCI. In one example, if the group-common DCI includes one type-indication field, the type-indication field is valid for all TPC values carried in the group-common DCI. That is, all TPC values indicate closed-loop power control adjustments for the same PUCCH type indicated by the type-indication field. In another example, if the group-common DCI indicates multiple type-indication fields, each type-indication field is valid only for the TPC value contained in the block where the type-indication field is located. If a block does not contain a type-indication field, the TPC value contained in the block indicates a closed-loop power control adjustment for a default PUCCH type. The default PUCCH type may be predefined in the system or configured in a semi-static mode by the BS.

While various embodiments of the present disclosure have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand exemplary features and functions of the present disclosure. Such persons would understand, however, that the present disclosure is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

It is also understood that any reference to an element herein using a designation such as "first, " "second, " and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.

Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

A person of ordinary skill in the art would further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software" or a "software module) , or any combination of these techniques.

To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure. In accordance with various embodiments, a processor, device, component, circuit, structure, machine, module, etc. can be configured to perform one or more of the functions described herein. The term “configured to” or “configured for” as used herein with respect to a specified operation or function refers to a processor, device, component, circuit, structure, machine, module, etc. that is physically constructed, programmed and/or arranged to perform the specified operation or function.

Furthermore, a person of ordinary skill in the art would understand that various illustrative logical blocks, modules, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and/or transceivers to communicate with various components within the network or within the device. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.

If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

In this document, the term "module" as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according embodiments of the present disclosure.

Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present disclosure. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present disclosure. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

Various modifications to the implementations described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the implementations shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.

Claims

A method performed by a wireless communication device, the method comprising:

receiving, from a wireless communication node, a configuration indicating a granularity for frequency domain resource related to multicast or broadcast service (MBS) transmission to the wireless communication device, wherein the granularity is determined based on a frequency domain resource range for the MBS transmission; and

determining the frequency domain resource related to the MBS transmission based on the granularity.
The method of claim 1, wherein:

the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs;

the granularity for frequency domain resource corresponds to a resource block group (RBG) size, which is a second number of PRBs contained in each RBG, for scheduling a MBS physical downlink shared channel (PDSCH) for the wireless communication device; and

the second number is adapted according to the first number.
The method of claim 2, further comprising:

receiving, from the wireless communication node, a specific downlink control information (DCI) directed specific to the wireless communication device;

determining that the MBS PDSCH is scheduled by the specific DCI; and

parsing a frequency domain resource allocation (FDRA) field in the specific DCI to determine, based on the RBG size corresponding to the MBS PRB set, allocation of frequency domain resources within at least one of:

the MBS PRB set, or

a downlink (DL) bandwidth part (BWP) comprising the MBS PRB set.
The method of claim 2, further comprising:

receiving, from the wireless communication node, a group-common downlink control information (DCI) directed to a group of wireless communication devices including the wireless communication device;

determining that the MBS PDSCH is scheduled by the group-common DCI; and

parsing a frequency domain resource allocation (FDRA) field in the group-common DCI to determine allocation of frequency domain resources within the MBS PRB set based on the RBG size corresponding to the MBS PRB set.
The method of claim 1, wherein:

the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs;

the granularity corresponds to a subband size, which is a second number of PRBs contained in each subband, for determining channel state information (CSI) on the MBS PRB set by the wireless communication device; and

the second number is adapted according to the first number.
The method of claim 5, wherein:

the subband size is included in a CSI report configuration and is configured as one of at least three candidate values that include: at least two subband size values corresponding to a downlink (DL) bandwidth part (BWP) comprising the MBS PRB set, and at least one subband size value corresponding to the MBS PRB set.
The method of claim 6, wherein:

the subband size is configured as a subband size value corresponding to a bandwidth, which is at least one of the MBS PRB set or the DL BWP;

the CSI report configuration comprises a bitmap corresponding to all subbands within the bandwidth;

each bit in the bitmap corresponds to a subband within the bandwidth and indicates the wireless communication device whether to report CSI with respect to the corresponding subband; and

the CSI report configuration comprises a bandwidth type indication to indicate whether the CSI report includes one CSI for the entire bandwidth or multiple CSI for multiple subbands within the entire bandwidth.
A method performed by a wireless communication device, the method comprising:

determining, among an uplink (UL) bandwidth part (BWP) and a UL multicast or broadcast service (MBS) BWP, at least one activated bandwidth part (BWP) for uplink transmission from the wireless communication device to a wireless communication node, wherein the at least one activated BWP is determined based on at least one of:

the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when both a downlink (DL) BWP and a DL MBS BWP are activated,

the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when the DL BWP is activated and the DL MBS BWP is not activated,

the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated, when the DL BWP is not activated and the DL MBS BWP is activated, or

the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is also activated, when both the DL BWP and the DL MBS BWP are activated.
The method of claim 8, further comprising:

when both the UL BWP and the UL MBS BWP are activated, determining, for a physical uplink control channel (PUCCH) that carries a hybrid automatic repeat request (HARQ) feedback corresponding to a physical downlink shared channel (PDSCH) , that the PUCCH is transmitted on which one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the wireless communication node or based on a system pre-definition, according to at least one of the following:

when the PDSCH is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, the PUCCH is transmitted on the UL BWP,

when the PDSCH is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH, the PUCCH is transmitted on the UL MBS BWP,

the PUCCH is always transmitted on the UL BWP, or

a PUCCH carrying a negative acknowledgement only (NACK-only) feedback is always transmitted on the UL MBS BWP.
The method of claim 8, further comprising:

when both the UL BWP and the UL MBS BWP are activated, determining, for a physical uplink control channel (PUCCH) that carries a channel state information (CSI) report, that the PUCCH is transmitted on which one of the UL BWP or the UL MBS BWP, according to at least one of the following:

the CSI report is transmitted on the UL BWP, based on a semi-static configuration by the wireless communication node,

the CSI report is transmitted on the UL MBS BWP, based on a semi-static configuration by the wireless communication node,

the CSI report is always transmitted on the UL BWP, based on a system pre-definition,

the CSI report is always transmitted on the UL MBS BWP, based on a system pre-definition, or

the CSI report is transmitted on the UL BWP or UL MBS BWP, depending to a type of the CSI report.
The method of claim 8, further comprising:

when both the UL BWP and the UL MBS BWP are activated, determining that an aperiodic sounding reference signal (SRS) is transmitted on which one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the wireless communication node or based on a system pre-definition, according to at least one of the following:

an aperiodic SRS triggered by a UL grant is transmitted on the UL BWP scheduled by the UL grant,

an aperiodic SRS triggered by a first DL grant is transmitted on the UL BWP, when a physical downlink shared channel (PDSCH) scheduled by the first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH,

an aperiodic SRS triggered by a second DL grant is transmitted on the UL MBS BWP, when a PDSCH scheduled by the second DL grant is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH,

an aperiodic SRS triggered by a third DL grant is transmitted on one of the UL BWP or the UL MBS BWP, according to an indication of a field in the third DL grant;

an aperiodic SRS triggered by a fourth DL grant is transmitted on the UL BWP, when a physical downlink control channel (PDCCH) carrying the fourth DL grant is transmitted on the DL BWP or a BWP indication field in the fourth DL grant indicates DL BWP,

an aperiodic SRS triggered by a fifth DL grant is transmitted on the UL MBS BWP, when a PDCCH carrying the fifth DL grant is transmitted on the DL MBS BWP or a BWP indication field in the fifth DL grant indicates DL MBS BWP,

an aperiodic SRS triggered by a group-common DCI is transmitted on the UL BWP, or

an aperiodic SRS triggered by a group-common DCI is transmitted on the UL MBS BWP.
A method performed by a wireless communication device, the method comprising:

determining a type of a physical uplink control channel (PUCCH) among a plurality of PUCCH types;

selecting, based on a semi-static configuration by a wireless communication node or based on a system pre-definition, one of a plurality of closed-loop power control modes according to the determined type; and

transmitting, to the wireless communication node, the PUCCH based on the selected closed-loop power control mode.
The method of claim 12, wherein the plurality of PUCCH types are different in terms of at least one of the following:

each of the plurality of PUCCH types is used to carry a hybrid automatic repeat request (HARQ) feedback corresponding to a physical downlink shared channel (PDSCH) with a different multicast or broadcast service (MBS) priority;

each of the plurality of PUCCH types is used to carry a HARQ feedback corresponding to a PDSCH with a different MBS service type; or

each of the plurality of PUCCH types is used to carry a HARQ feedback having one of a plurality of different feedback types, wherein the plurality of different feedback types include at least one of: HARQ acknowledgement (HARQ-ACK) feedback, HARQ-ACK feedback for MBS PDSCH, HARQ-ACK feedback for unicast PDSCH, negative acknowledgement only (NACK-only) feedback, or NACK-only feedback for MBS PDSCH.
The method of claim 12, wherein the plurality of closed-loop power control modes are different in terms of at least one of the following:

the plurality of closed-loop power control modes correspond to independent power control sets for different PUCCH types;

the plurality of closed-loop power control modes correspond to different power control levels for different PUCCH types, wherein the different power control levels are elements of a same power control set;

the plurality of closed-loop power control modes correspond to an absolute closed-loop power control and an accumulative closed-loop power control for different PUCCH types; or

the plurality of closed-loop power control modes correspond to a closed-loop power control and a no closed-loop power control for different PUCCH types.
The method of claim 12, further comprising:

receiving, from the wireless communication node, a group-common DCI for PUCCH closed-loop power control, wherein

the group-common DCI includes a single type-indication field indicating a PUCCH type, and

all transmit power control (TPC) values carried in the group-common DCI indicate power control adjustments for the PUCCH type.
The method of claim 12, further comprising:

receiving, from the wireless communication node, a group-common DCI for PUCCH closed-loop power control, wherein

the group-common DCI includes a plurality of type-indication fields,

each of the plurality of type-indication fields indicates a PUCCH type corresponding to a transmit power control (TPC) value carried in a block, where the type-indication field is located, in the group-common DCI, and

when a certain block contains no type-indication field, a TPC value carried in the certain block indicates a power control adjustment for a default PUCCH type, wherein the default PUCCH type is determined based on a semi-static configuration by the wireless communication node or based on a system pre-definition.
A method performed by a wireless communication node, the method comprising:

transmitting, to a wireless communication device, a configuration indicating a granularity for frequency domain resource related to multicast or broadcast service (MBS) transmission to the wireless communication device,

wherein the granularity is determined based on a frequency domain resource range for the MBS transmission, and

wherein the frequency domain resource related to the MBS transmission is determined based on the granularity.
The method of claim 17, wherein:

the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs;

the granularity for frequency domain resource corresponds to a resource block group (RBG) size, which is a second number of PRBs contained in each RBG, for scheduling a MBS physical downlink shared channel (PDSCH) for the wireless communication device; and

the second number is adapted according to the first number.
The method of claim 18, further comprising:

transmitting, to the wireless communication device, a specific downlink control information (DCI) directed specific to the wireless communication device, wherein

the MBS PDSCH is scheduled by the specific DCI, and

a frequency domain resource allocation (FDRA) field in the specific DCI indicates, based on the RBG size corresponding to the MBS PRB set, allocation of frequency domain resources within at least one of: the MBS PRB set, or a downlink (DL) bandwidth part (BWP) comprising the MBS PRB set.
The method of claim 18, further comprising:

transmitting, to the wireless communication device, a group-common downlink control information (DCI) directed to a group of wireless communication devices including the wireless communication device, wherein

the MBS PDSCH is scheduled by the group-common DCI, and

a frequency domain resource allocation (FDRA) field in the group-common DCI indicates allocation of frequency domain resources within the MBS PRB set based on the RBG size corresponding to the MBS PRB set.
The method of claim 17, wherein:

the frequency domain resource range for the MBS transmission includes a MBS physical resource block (PRB) set comprising a first number of PRBs;

the granularity corresponds to a subband size, which is a second number of PRBs contained in each subband, for determining channel state information (CSI) on the MBS PRB set by the wireless communication device; and

the second number is adapted according to the first number.
The method of claim 21, wherein:

the subband size is included in a CSI report configuration and is configured as one of at least three candidate values that include: at least two subband size values corresponding to a downlink (DL) bandwidth part (BWP) comprising the MBS PRB set, and at least one subband size value corresponding to the MBS PRB set.
The method of claim 22, wherein:

the subband size is configured as a subband size value corresponding to a bandwidth, which is at least one of the MBS PRB set or the DL BWP;

the CSI report configuration comprises a bitmap corresponding to all subbands within the bandwidth;

each bit in the bitmap corresponds to a subband within the bandwidth and indicates the wireless communication device whether to report CSI with respect to the corresponding subband; and

the CSI report configuration comprises a bandwidth type indication to indicate whether the CSI report includes one CSI for the entire bandwidth or multiple CSI for multiple subbands within the entire bandwidth.
A method performed by a wireless communication node, the method comprising:

configuring, for a wireless communication device, at least one activated bandwidth part (BWP) , among an uplink (UL) bandwidth part (BWP) and a UL multicast or broadcast service (MBS) BWP, for uplink transmission from the wireless communication device to the wireless communication node, wherein the at least one activated BWP is configured based on at least one of:

the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when both a downlink (DL) BWP and a DL MBS BWP are activated,

the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated, when the DL BWP is activated and the DL MBS BWP is not activated,

the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated, when the DL BWP is not activated and the DL MBS BWP is activated, or

the UL BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is also activated, when both the DL BWP and the DL MBS BWP are activated.
The method of claim 24, wherein:

when both the UL BWP and the UL MBS BWP are activated, for a physical uplink control channel (PUCCH) that carries a hybrid automatic repeat request (HARQ) feedback corresponding to a physical downlink shared channel (PDSCH) , the PUCCH is determined to be transmitted on which one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the wireless communication node or based on a system pre-definition, according to at least one of the following:

when the PDSCH is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, the PUCCH is transmitted on the UL BWP,

when the PDSCH is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH, the PUCCH is transmitted on the UL MBS BWP,

the PUCCH is always transmitted on the UL BWP, or

a PUCCH carrying a negative acknowledgement only (NACK-only) feedback is always transmitted on the UL MBS BWP.
The method of claim 24, wherein:

when both the UL BWP and the UL MBS BWP are activated, for a physical uplink control channel (PUCCH) that carries a channel state information (CSI) report, the PUCCH is determined to be transmitted on which one of the UL BWP or the UL MBS BWP, according to at least one of the following:

the CSI report is transmitted on the UL BWP, based on a semi-static configuration by the wireless communication node,

the CSI report is transmitted on the UL MBS BWP, based on a semi-static configuration by the wireless communication node,

the CSI report is always transmitted on the UL BWP, based on a system pre-definition,

the CSI report is always transmitted on the UL MBS BWP, based on a system pre-definition, or

the CSI report is transmitted on the UL BWP or UL MBS BWP, depending to a type of the CSI report.
The method of claim 24, wherein:

when both the UL BWP and the UL MBS BWP are activated, an aperiodic sounding reference signal (SRS) is determined to be transmitted on which one of the UL BWP or the UL MBS BWP, based on a semi-static configuration by the wireless communication node or based on a system pre-definition, according to at least one of the following:

an aperiodic SRS triggered by a UL grant is transmitted on the UL BWP scheduled by the UL grant,

an aperiodic SRS triggered by a first DL grant is transmitted on the UL BWP, when a physical downlink shared channel (PDSCH) scheduled by the first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH,

an aperiodic SRS triggered by a second DL grant is transmitted on the UL MBS BWP, when a PDSCH scheduled by the second DL grant is transmitted on the DL MBS BWP or the PDSCH is a MBS PDSCH,

an aperiodic SRS triggered by a third DL grant is transmitted on one of the UL BWP or the UL MBS BWP, according to an indication of a field in the third DL grant;

an aperiodic SRS triggered by a fourth DL grant is transmitted on the UL BWP, when a physical downlink control channel (PDCCH) carrying the fourth DL grant is transmitted on the DL BWP or a BWP indication field in the fourth DL grant indicates DL BWP,

an aperiodic SRS triggered by a fifth DL grant is transmitted on the UL MBS BWP, when a PDCCH carrying the fifth DL grant is transmitted on the DL MBS BWP or a BWP indication field in the fifth DL grant indicates DL MBS BWP,

an aperiodic SRS triggered by a group-common DCI is transmitted on the UL BWP, or

an aperiodic SRS triggered by a group-common DCI is transmitted on the UL MBS BWP.
A method performed by a wireless communication node, the method comprising:

receiving, from a wireless communication device, a physical uplink control channel (PUCCH) based on a closed-loop power control mode, wherein

the closed-loop power control mode is selected, based on a semi-static configuration by the wireless communication node or based on a system pre-definition, from a plurality of closed-loop power control modes according to a type of the PUCCH, and

the type of the PUCCH is determined among a plurality of PUCCH types.
The method of claim 28, wherein the plurality of PUCCH types are different in terms of at least one of the following:

each of the plurality of PUCCH types is used to carry a hybrid automatic repeat request (HARQ) feedback corresponding to a physical downlink shared channel (PDSCH) with a different multicast or broadcast service (MBS) priority;

each of the plurality of PUCCH types is used to carry a HARQ feedback corresponding to a PDSCH with a different MBS service type; or

each of the plurality of PUCCH types is used to carry a HARQ feedback having one of a plurality of different feedback types, wherein the plurality of different feedback types include at least one of: HARQ acknowledgement (HARQ-ACK) feedback, HARQ-ACK feedback for MBS PDSCH, HARQ-ACK feedback for unicast PDSCH, negative acknowledgement only (NACK-only) feedback, or NACK-only feedback for MBS PDSCH.
The method of claim 28, wherein the plurality of closed-loop power control modes are different in terms of at least one of the following:

the plurality of closed-loop power control modes correspond to independent power control sets for different PUCCH types;

the plurality of closed-loop power control modes correspond to different power control levels for different PUCCH types, wherein the different power control levels are elements of a same power control set;

the plurality of closed-loop power control modes correspond to an absolute closed-loop power control and an accumulative closed-loop power control for different PUCCH types; or

the plurality of closed-loop power control modes correspond to a closed-loop power control and a no closed-loop power control for different PUCCH types.
The method of claim 28, further comprising:

transmitting, to the wireless communication device, a group-common DCI for PUCCH closed-loop power control, wherein

the group-common DCI includes a single type-indication field indicating a PUCCH type, and

all transmit power control (TPC) values carried in the group-common DCI indicate power control adjustments for the PUCCH type.
The method of claim 28, further comprising:

transmitting, to the wireless communication device, a group-common DCI for PUCCH closed-loop power control, wherein

the group-common DCI includes a plurality of type-indication fields,

each of the plurality of type-indication fields indicates a PUCCH type corresponding to a transmit power control (TPC) value carried in a block, where the type-indication field is located, in the group-common DCI, and

when a certain block contains no type-indication field, a TPC value carried in the certain block indicates a power control adjustment for a default PUCCH type, wherein the default PUCCH type is determined based on a semi-static configuration by the wireless communication node or based on a system pre-definition.
A wireless communication device configured to carry out the method of any one of claims 1 through 16.
A wireless communication node configured to carry out the method of any one of claims 17 through 32.
A non-transitory computer-readable medium having stored thereon computer-executable instructions for carrying out the method of any one of claims 1 through 32.