CN116724627A - Method, apparatus and system for multicast or broadcast transmission - Google Patents

Method, apparatus and system for multicast or broadcast transmission Download PDF

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Publication number
CN116724627A
CN116724627A CN202180090726.7A CN202180090726A CN116724627A CN 116724627 A CN116724627 A CN 116724627A CN 202180090726 A CN202180090726 A CN 202180090726A CN 116724627 A CN116724627 A CN 116724627A
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China
Prior art keywords
bwp
mbs
pucch
wireless communication
pdsch
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CN202180090726.7A
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Chinese (zh)
Inventor
张晨晨
刘星
魏兴光
郝鹏
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

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

Description

Method, apparatus and system for multicast or broadcast transmission
Technical Field
The present disclosure relates generally to wireless communications, and more particularly, to methods, apparatus, and systems for wireless transmission in a multicast or broadcast service mode.
Background
The fifth generation (5G) new air interface (NR) network will support a series of unicast functions for unicast transmissions. But no supported multicast or broadcast service (MBS) -related functions have been specified for the 5G NR network. In order to enable multicast transmission for a plurality of User Equipments (UEs), a common frequency domain resource may be configured for the plurality of UEs to transmit a multicast service to the UEs through the common frequency domain resource. On a unicast bandwidth part (BWP), several common Physical Resource Blocks (PRBs) may be configured for the UE as common frequency domain resources, or a dedicated MBS BWP for multicast transmission may also be configured for the UE.
The UE may send a Physical Uplink Control Channel (PUCCH) carrying multicast transmission information to the base station. Under the condition that channel reciprocity is applicable, the UE also transmits a Sounding Reference Signal (SRS) to the base station, so that the base station is assisted to acquire downlink CSI on the public frequency domain resource. However, there is no existing solution as to how to have multiple UEs receiving multicast transmissions have the same understanding of resource allocation for MBS transmissions or how these UEs send PUCCH and SRS related to MBS transmissions to a base station.
Disclosure of Invention
The exemplary embodiments disclosed herein are directed to solving problems associated with one or more of the problems occurring in the prior art, and to providing additional functions which will become apparent upon reference to the following detailed description when taken in conjunction with the drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and that various modifications of the disclosed embodiments may be made while remaining within the scope of the disclosure, as will be apparent to those of ordinary skill in the art from reading the disclosure.
In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises the following steps: receiving a configuration from a wireless communication node, the configuration indicating a granularity of frequency domain resources related to a multicast or broadcast service (MBS) transmission to the wireless communication device, wherein the granularity is determined based on a frequency domain resource range of the MBS transmission; and determining the frequency domain resource associated with the MBS transmission based on the granularity.
In a further embodiment, a method performed by a wireless communication device is disclosed. The method comprises the following steps: at least one active bandwidth part (BWP) for uplink transmission from the wireless communication device to the wireless communication node is determined in an Uplink (UL) bandwidth part (BWP) and UL multicast or broadcast service (MBS) BWP. The at least one activated BWP is determined based on at least one of: when both Downlink (DL) BWP and 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 BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated; when the DL BWP is not activated and the DL MBS BWP is activated, the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated; or when both the DL BWP and the DL MBS BWP are activated, the UL BWP is activated for uplink transmission of the wireless communication device, and the UL MBS BWP is also activated.
In another embodiment, a method performed by a wireless communication device is disclosed. The method comprises the following steps: determining one Physical Uplink Control Channel (PUCCH) type among a plurality of PUCCH types; selecting one of a plurality of closed loop power control modes according to the determined type based on a semi-static configuration of the wireless communication node or based on system predefining; and transmitting the PUCCH to the wireless communication node 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 the following steps: a configuration is sent to a wireless communication device indicating a granularity of frequency domain resources related to a multicast or broadcast service (MBS) transmission to the wireless communication device. The granularity is determined based on a frequency domain resource range of the MBS transmission. The frequency domain resources associated with the MBS transmission are determined based on the granularity.
In yet another embodiment, a method performed by a wireless communication node is disclosed. The method comprises the following steps: at least one of an Uplink (UL) bandwidth part (BWP) and an UL multicast or broadcast service (MBS) BWP is configured for the wireless communication device to activate the bandwidth part (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: when both Downlink (DL) BWP and 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 BWP is activated for uplink transmission of the wireless communication device and the UL MBS BWP is not activated; when the DL BWP is not activated and the DL MBS BWP is activated, the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated; or when both the DL BWP and the DL MBS BWP are activated, the UL BWP is activated for uplink transmission of the wireless communication device, and the UL MBS BWP is also activated.
In yet another embodiment, a method performed by a wireless communication node is disclosed. The method comprises the following steps: a Physical Uplink Control Channel (PUCCH) based on a closed loop power control mode is received from a wireless communication device. The closed loop power control mode is selected from a plurality of closed loop power control modes according to the type of the PUCCH based on a semi-static configuration of the wireless communication node or based on a system pre-definition. The type of the PUCCH is determined among a plurality of PUCCH types.
In various embodiments, a wireless communication node configured to perform the method disclosed in some embodiments is disclosed. In yet another embodiment, a wireless communication device configured to perform the method disclosed in some embodiments is disclosed. In yet another embodiment, a non-transitory computer-readable medium having stored thereon computer-executable instructions for performing the methods disclosed in some embodiments is disclosed.
Drawings
Various exemplary embodiments of the present disclosure are described in detail below with reference to the following drawings. The drawings are for purposes of illustration only and depict only exemplary embodiments of the disclosure to facilitate the reader's understanding of the disclosure. Accordingly, the drawings should not be taken as limiting the breadth, scope, or applicability of the present disclosure. It should be noted that for clarity and ease of illustration, the drawings are not necessarily made to scale.
Fig. 1 illustrates an exemplary communication network in which the 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) according to some embodiments of the present disclosure.
Fig. 3A illustrates a flowchart of a method performed by a BS for multicast or broadcast service (MBS) transmission according to some embodiments of the present disclosure.
Fig. 3B illustrates a flowchart of another method performed by a BS for power control, according to some embodiments of the present disclosure.
Fig. 4 illustrates a block diagram of a User Equipment (UE) according to some embodiments of the present disclosure.
Fig. 5A illustrates a flowchart of a method performed by a UE for MBS transmission, according to some embodiments of the present disclosure.
Fig. 5B illustrates a flowchart of another method performed by a UE for power control, according to some embodiments of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure are described below with reference to the drawings to enable one of ordinary skill in the art to make and use the present disclosure. It will be apparent to those of ordinary skill in the art after reading this disclosure that various changes or modifications can be made to the examples described herein without departing from the scope of the disclosure. Thus, the disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the particular order and/or hierarchy of steps in the methods disclosed herein is merely exemplary. Based on design preferences, the specific order or hierarchy of steps in the disclosed methods or processes may be rearranged while remaining within the scope of the present disclosure. Accordingly, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in an example order, and that the present disclosure is not limited to the particular order or hierarchy presented, unless specifically stated otherwise.
A typical wireless communication network includes one or more base stations (often referred to as "BSs") that each provide geographic wireless coverage and one or more wireless user equipment (often referred to as "UEs") that can transmit and receive data within the wireless coverage. In a wireless communication network, a BS and a UE may 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 transmission in multicast or broadcast service (MBS) mode. In MBS mode, a network node (e.g., a base station) will use the same transmission mechanism to send the same information to a group of UEs. MBS transmissions may be made on a Physical Downlink Shared Channel (PDSCH) received by the group of UEs. PDSCH carrying multicast transport blocks may be referred to as group common PDSCH or MBS PDSCH. The base station may schedule the MBS PDSCH based on UE-specific DCI for a single UE or group DCI for a group of UEs. Regardless of which type of Downlink Control Information (DCI) is used to schedule the MBS PDSCH, a Frequency Domain Resource Allocation (FDRA) field in the DCI may indicate the frequency domain resources used by the MBS PDSCH.
The base station may know downlink CSI within the frequency domain resource range for MBS transmission based on the CSI report sent by the UE. The base station may also know downlink CSI within the frequency domain resource range for MBS transmission by receiving a Sounding Reference Signal (SRS) transmitted by the UE and using channel reciprocity. In order for the base station to know whether the UE correctly receives the MBS transmission, the UE may send hybrid automatic repeat request (HARQ) feedback corresponding to the MBS transmission to the base station to inform the base station of whether the UE correctly receives the MBS PDSCH transport block. The HARQ feedback may be in the form of acknowledgement-negative acknowledgement (ACK-NACK) feedback or negative acknowledgement only (NACK-only) feedback. ACK-NACK feedback means that the UE feeds back different values on Physical Uplink Control Channel (PUCCH) resources corresponding to ACK and NACK. For example, "1" indicates that the MBS PDSCH transport block was not successfully received, i.e., NACK; "0" indicates that the MBS PDSCH transport block was successfully received, i.e., an ACK. NACK-only feedback means that the UE transmits feedback, i.e. NACK, on PUCCH resources only if the UE fails to receive the message.
The methods disclosed in the present teachings may be implemented in a wireless communication network in which a BS and a UE may 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, BSs in the present disclosure may be referred to as network sides and may include or be implemented as next generation node BS (gNB or gndeb), E-UTRAN node BS (eNB or eNodeB), transmission/reception points (TRP), access Points (AP), AP MLD, non-terrestrial reception points for satellite/hot air balloon/Unmanned Aerial Vehicle (UAV) communications, wireless transceivers in vehicles of a vehicle-to-vehicle (V2V) wireless network, and the like; while a UE in the present disclosure may be referred to as a terminal and may include or be implemented as a Mobile Station (MS), a Station (STA), a non-AP MLD, a ground equipment for satellite/hot air balloon/Unmanned Aerial Vehicle (UAV) communication, a wireless transceiver in a vehicle of a vehicle-to-vehicle (V2V) wireless network, and so on.
In various embodiments of the present teachings, both ends of the communication, e.g., BS and UE, may be described herein as non-limiting examples of "wireless communication node" and "wireless communication device", respectively, which may practice the methods disclosed herein and enable wireless and/or wired communication in accordance with various embodiments of the present disclosure.
Fig. 1 illustrates an exemplary communication network 100 in which the techniques disclosed herein may be implemented, according to an embodiment of the present disclosure. As shown in fig. 1, an exemplary communication network 100 includes a Base Station (BS) 101 and a plurality of UEs, UE 1 110, UE 2 120 … UE 3 130, wherein the BS 101 may communicate with the UEs according to a wireless protocol. BS 101 may perform multicast or broadcast service (MBS) transmission to a group of UEs (e.g., UE 1 110, UE 2 120, and UE 3 130) by transmitting an MBS PDSCH to the group of UEs. The present teachings provide a method of indicating frequency domain resources in MBS PDSCH scheduling such that the group of UEs receiving the MBS PDSCH can consistently understand the Physical Resource Blocks (PRBs) occupied by the MBS PDSCH. Based on the method disclosed herein, the UE can better support PUCCH and SRS transmission, so that the frequency domain positions where the PUCCH and SRS should be transmitted can be known, and the transmission power of different types of PUCCHs can be identified, so that the reliability of PUCCH transmission is ensured.
Fig. 2 illustrates a block diagram of a Base Station (BS) 200, according to some embodiments of the present disclosure. BS 200 is an example of a node or device that may be configured to implement the various methods described herein. As shown in fig. 2, BS 200 includes a housing 240 in which system clock 202, processor 204, memory 206, transceiver 210 including transmitter 212 and receiver 214, power module 208, downlink transmission configurator 220, downlink control information generator 222, active BWP configurator 224, and uplink signal analyzer 226 are housed.
In this embodiment, system clock 202 provides timing signals to processor 204 for controlling the timing of all operations of BS 200. Processor 204 controls the general operation of BS 200 and may 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 Arrays (FPGAs), programmable Logic Devices (PLDs), controllers, state machines, gating logic, discrete hardware components, dedicated hardware finite state machines, or any other suitable circuit, device, and/or structure that can perform the computation or other operation of data.
Memory 206, which may include both Read Only Memory (ROM) and Random Access Memory (RAM), may provide instructions and data to processor 204. A portion of the memory 206 may also include non-volatile random access memory (NVRAM). The processor 204 typically performs logical and arithmetic operations based on program instructions stored in the memory 206. Instructions (also referred to as software) stored in memory 206 may be executed by processor 204 to perform the methods described herein. Together, processor 204 and memory 206 form a processing system that stores and executes software. As used herein, "software" refers to any type of instruction, whether referred to as software, firmware, middleware, microcode, etc., that can configure the machine or device to perform one or more desired functions or procedures. The instructions may include code (e.g., source code format, binary code format, executable code format, or any other suitable code format). The instructions, when executed by one or more processors, cause the processing system to perform the various functions described herein.
Transceiver 210, including transmitter 212 and receiver 214, allows BS 200 to transmit data to and receive data 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, 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 multiple beams (each beam pointing in a different direction). The transmitter 212 may 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 may be configured to determine the type of packet and process the packet and/or fields of the packet accordingly.
In wireless communication, downlink transmission configurator 220 in BS 200 may generate a configuration indicating granularity of frequency domain resources related to multicast or broadcast service (MBS) transmissions to a group of UEs. The downlink transmission configurator 220 may determine the granularity based on the frequency domain resource range of the MBS transmission and may determine the frequency domain resource related to the MBS transmission based on the granularity. The downlink transmission configurator 220 may then send a configuration indicating granularity to the UEs in the group via the transmitter 212.
In various embodiments, the frequency domain resource range for the MBS transmission includes a set of MBS Physical Resource Blocks (PRBs), the set including a first number of PRBs. The granularity of the frequency domain resources corresponds to a Resource Block Group (RBG) size, which is a second number of PRBs contained in each RBG, for scheduling an MBS Physical Downlink Shared Channel (PDSCH) for the UE. The second number is adjusted according to the first number. For example, the second number increases with the first number. That is, a larger frequency domain resource range may correspond to a larger RBG size or a larger frequency domain resource granularity.
In various embodiments, the downlink control information generator 222 in this example may generate Downlink Control Information (DCI) for scheduling the MBS PDSCH. In an embodiment, the downlink control information generator 222 generates and transmits UE-specific DCI specific to the UE for scheduling the MBS PDSCH via the transmitter 212. A Frequency Domain Resource Allocation (FDRA) field in the UE-specific DCI indicates allocation of frequency domain resources in at least one of: the MBS PRB set, or a Downlink (DL) bandwidth part (BWP) including the MBS PRB set. In some embodiments, the RBG size corresponding to the MBS PRB set may be smaller than the RBG size corresponding to the DL BWP.
In some embodiments, the downlink control information generator 222 generates and transmits, via the transmitter 212, group common DCI directed to a UE group including the UE to the UE. When an MBS PDSCH is scheduled by a group common DCI, a Frequency Domain Resource Allocation (FDRA) field in the group common DCI may 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, the frequency domain resource range for the MBS transmission includes a set of MBS Physical Resource Blocks (PRBs), the set including a first number of PRBs, and the granularity corresponds to a subband size, the subband size being 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 adjusted according to the first number. For example, the second number increases with the first number. That is, a larger frequency domain resource range may correspond to a larger subband size or a larger granularity for CSI measurement and reporting for the UE.
In some embodiments, the MBS PRB set is a subset of a Downlink (DL) bandwidth portion (BWP) configured by BS 200 for the UE. In some embodiments, the subband size is included in a CSI reporting configuration sent from 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 to a subband size value corresponding to a bandwidth that is at least one of the MBS PRB set or the DL BWP. The CSI reporting configuration includes 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 for the corresponding subband. The CSI reporting configuration may also include 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 may determine or configure at least one active bandwidth part (BWP) for uplink transmission from the UE to the BS 200 for the UE. The UE may be configured with one or more Uplink (UL) bandwidth parts (BWP) and UL multicast or broadcast service (MBS) BWP. In various embodiments, the at least one active BWP is configured based on at least one of the following. First, when both Downlink (DL) BWP and DL MBS BWP are activated, one of the UL BWP is activated for uplink transmission of the UE, and the UL MBS BWP is not activated. Second, when the DL BWP is activated and the DL MBS BWP is not activated, one of the UL BWP is activated for uplink transmission of the UE and the UL MBS BWP is not activated. Third, when the DL BWP is not activated and the DL MBS BWP is activated, the UL MBS BWP is activated for uplink transmission of the UE and no UL BWP is activated. Fourth, when both the DL BWP and the DL MBS BWP are activated, one of the UL BWP is activated for uplink transmission of the UE, and the UL MBS BWP is also activated.
In some embodiments, when both the UL BWP and the UL MBS BWP are activated, for a PUCCH carrying HARQ feedback corresponding to the PDSCH, 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, based on a semi-static configuration of BS 200 or based on system predefining. 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 an MBS PDSCH, the PUCCH is transmitted on the UL MBS BWP. Third, the PUCCH is always transmitted on the UL BWP. Fourth, PUCCH carrying 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 carrying 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: first, the CSI report is transmitted on the UL BWP based on the semi-static configuration of the BS 200. Second, the CSI report is transmitted on the UL MBS BWP based on the semi-static configuration of the BS. Third, the CSI report is always transmitted on the UL BWP based on system predefining. Fourth, the CSI report is always transmitted on the UL MBS BWP based on system predefining. Fifth, the CSI report is transmitted on the UL BWP or UL MBS BWP depending on the 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, based on a semi-static configuration of BS 200 or based on system predefining, the transmission of aperiodic Sounding Reference Signals (SRS) on one of the UL BWP or the UL MBS BWP is determined according to at least one of: transmitting an aperiodic SRS triggered by an UL grant on the UL BWP scheduled by the UL grant; transmitting an aperiodic SRS triggered by a first DL grant on the UL BWP when the PDSCH scheduled by the first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH; transmitting an aperiodic SRS triggered by a second DL grant on the UL MBS BWP when the PDSCH scheduled by the second DL grant is transmitted on the DL MBS BWP or the PDSCH is an MBS PDSCH; transmitting an aperiodic SRS triggered by a third DL grant on one of the UL BWP or the UL MBS BWP according to an indication of a field in the third DL grant; transmitting an aperiodic SRS triggered by a fourth DL grant on the UL BWP when a PDCCH carrying the fourth DL grant or a BWP indication field in the fourth DL grant indicates DL BWP on the DL BWP; when a PDCCH carrying a fifth DL grant or a BWP indication field in the fifth DL grant indicates DL MBS BWP on the DL MBS BWP, transmitting an aperiodic SRS triggered by the fifth DL grant on the UL MBS BWP; transmitting an aperiodic SRS triggered by the group common DCI on the UL BWP; or transmits an aperiodic SRS triggered by the group common DCI on the UL MBS BWP.
In some embodiments, the UL grant refers to DCI for scheduling UL transmissions. In some embodiments, the DL grant refers to DCI for scheduling DL transmission.
In some embodiments, the uplink signal analyzer 226 in this example may receive the PUCCH from the UE via the receiver 214 based on a closed loop power control mode. The closed loop power control mode is selected from a plurality of closed loop power control modes according to the type of the PUCCH based on a semi-static configuration of BS 200 or based on system predefining. The type of the PUCCH is determined among a plurality of PUCCH types, which may be different in at least one of the following aspects. First, each of the plurality of PUCCH types is used to carry HARQ feedback corresponding to PDSCH with different MBS priority. Second, each of the plurality of PUCCH types is used to carry HARQ feedback corresponding to PDSCH with a different MBS service type. Third, each of the plurality of PUCCH types is for carrying HARQ feedback having one of a plurality of different feedback types. The plurality of different feedback types includes 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 at least one of: the plurality of closed-loop power control modes corresponds 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 corresponds to absolute closed loop power control and cumulative closed loop power control for different PUCCH types; or the plurality of closed loop power control modes corresponds to closed loop power control and non-closed loop power control for different PUCCH types.
In some embodiments, the downlink control information generator 222 may generate and transmit a group common DCI for PUCCH closed-loop power control to the UE via the transmitter 212. The set of common DCIs includes a single type indication field indicating a PUCCH type. All Transmit Power Control (TPC) values carried in the set of common DCI indicate the power control adjustment for that PUCCH type.
In some embodiments, the downlink control information generator 222 may generate and transmit a set of common DCI for PUCCH closed-loop power control to the UE via the transmitter 212, wherein the set of 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 in which the type indication field is located in the set of common DCI. When a particular block does not contain a type indication field, the TPC value carried in that particular block indicates a power control adjustment for the default PUCCH type. The default PUCCH type is determined based on a semi-static configuration of BS 200 or based on system pre-definition.
The power module 208 may 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 BS 200 is coupled to a dedicated external power source (e.g., a wall outlet), power module 208 may include a transformer and a power regulator.
The various modules discussed above are coupled together by a bus system 230. The bus system 230 may include a data bus and may include, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It should be appreciated that the modules of BS 200 may be operatively coupled to each other using any suitable techniques and mediums.
Although a number of individual modules or components are shown in fig. 2, one of ordinary skill in the art will appreciate that one or more modules may be combined or implemented together. For example, the processor 204 may implement not only the functions described above with respect to the processor 204, but also the functions described above with respect to the downstream transport configurator 220. Rather, each module shown in fig. 2 may be implemented using a plurality of separate components or elements.
Fig. 3A illustrates a flow chart of a method 310 performed by a BS (e.g., BS 200 in fig. 2) for multicast or broadcast service (MBS) transmission according to some embodiments of the present disclosure. In operation 311, the BS determines a frequency domain resource range and granularity of frequency domain resources related to multicast or broadcast service (MBS) transmission to the UE. In operation 312, the BS generates a configuration indicating granularity of frequency domain resources related to MBS transmission. In 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 flowchart of another method 320 for power control performed by a BS (e.g., BS 200 in fig. 2) in accordance with some embodiments of the present disclosure. In operation 321, the BS generates a semi-static configuration for the UE to select one of a plurality of closed loop power control modes according to a type of a Physical Uplink Control Channel (PUCCH). In operation 322, the BS receives the PUCCH from the UE 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. UE 400 is an example of a device that may be configured to implement the various methods described herein. As shown in fig. 4, the UE 400 includes a housing 440 in which the system clock 402, the processor 404, the memory 406, the transceiver 410 including the transmitter 412 and the receiver 414, the power module 408, the resource determiner 420, the downlink control information analyzer 422, the active BWP determiner 424, and the power control mode selector 426 are accommodated.
In this embodiment, system clock 402, processor 404, memory 406, transceiver 410, and power module 408 operate similarly to system clock 202, processor 204, memory 206, transceiver 210, and power module 208 in BS 200. An antenna 450 or multiple antenna array 450 is typically attached to the housing 440 and electrically coupled to the transceiver 410.
In this example, the resource determiner 420 may receive, via the receiver 414, a configuration from the BS indicating a granularity of frequency domain resources related to a 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 of the MBS transmission. The resource determiner 420 may analyze the configuration to determine frequency domain resources related to the MBS transmission based on the granularity.
In various embodiments, the frequency domain resource range for the MBS transmission includes a set of MBS Physical Resource Blocks (PRBs), the set including a first number of PRBs. The granularity of the frequency domain resources corresponds to a Resource Block Group (RBG) size, which is a second number of PRBs contained in each RBG, for scheduling an MBS Physical Downlink Shared Channel (PDSCH) for the UE 400. The second number is adjusted according to the first number. For example, the second number increases with the first number. That is, a larger frequency domain resource range may correspond to a larger RBG size or a larger frequency domain resource granularity.
In various embodiments, the downlink control information analyzer 422 in this example may receive and analyze Downlink Control Information (DCI) for scheduling the MBS PDSCH from the BS via the receiver 414. In an embodiment, the downlink control information analyzer 422 determines that the DCI is UE-specific DCI 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 an allocation of frequency domain resources in at least one of: the MBS PRB set, or a Downlink (DL) bandwidth part (BWP) including the MBS PRB set. In some embodiments, the RBG size corresponding to the MBS PRB set may be smaller than the RBG size corresponding to the DL BWP.
In some embodiments, the downlink control information analyzer 422 may receive and analyze group common DCI directed to a UE group including the UE 400 from the BS via the receiver 414. In an 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 set of common DCIs to determine an allocation of frequency domain resources within the MBS PRB set based on the RBG size corresponding to the MBS PRB set.
In some embodiments, the frequency domain resource range for the MBS transmission includes a set of MBS Physical Resource Blocks (PRBs), the set including a first number of PRBs, and the granularity corresponds to a subband size that 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 adjusted according to the first number. For example, the second number increases with the first number. That is, a larger frequency domain resource range may correspond to a larger subband size or a larger granularity for CSI measurement and reporting for UE 400.
In some embodiments, the MBS PRB set is a subset of a Downlink (DL) bandwidth portion (BWP) configured by the BS for the UE 400. In some embodiments, the subband size is included in a CSI reporting configuration sent 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 to a subband size value corresponding to a bandwidth that is at least one of the MBS PRB set or the DL BWP. The CSI reporting configuration includes 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 for the corresponding subband. The CSI reporting configuration may also include 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 may determine at least one active bandwidth part (BWP) for uplink transmission from the UE 400 to the BS. UE 400 may be configured with one or more Uplink (UL) bandwidth parts (BWP) and UL multicast or broadcast service (MBS) BWP. In various embodiments, the active BWP determiner 424 determines at least one active BWP based on at least one of the following. First, when both Downlink (DL) BWP and DL MBS BWP are activated, one of the UL BWP is activated for uplink transmission of the UE 400, and the UL MBS BWP is not activated. Second, when the DL BWP is activated and the DL MBS BWP is not activated, one of the UL BWP is activated for uplink transmission of the UE 400 and the UL MBS BWP is not activated. Third, when the DL BWP is not activated and the DL MBS BWP is activated, the UL MBS BWP is activated for uplink transmission of the UE 400 and no UL BWP is activated. Fourth, when both the DL BWP and the DL MBS BWP are activated, one of the UL BWP is activated for uplink transmission of the UE 400, and the UL MBS BWP is also activated.
In some embodiments, when both the UL BWP and the UL MBS BWP are activated, for a PUCCH carrying HARQ feedback corresponding to PDSCH, 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, based on a semi-static configuration of the BS or based on system predefining. 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 an MBS PDSCH, the PUCCH is transmitted on the UL MBS BWP. Third, the PUCCH is always transmitted on the UL BWP. Fourth, PUCCH carrying 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 carrying 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: first, the CSI report is transmitted on the UL BWP based on the semi-static configuration of the BS. Second, the CSI report is transmitted on the UL MBS BWP based on the semi-static configuration of the BS. Third, the CSI report is always transmitted on the UL BWP based on system predefining. Fourth, the CSI report is always transmitted on the UL MBS BWP based on system predefining. Fifth, the CSI report is transmitted on the UL BWP or UL MBS BWP depending on the 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, based on a semi-static configuration of the BS or based on system predefining, the transmission of aperiodic Sounding Reference Signals (SRS) on one of the UL BWP or the UL MBS BWP is determined according to at least one of: transmitting an aperiodic SRS triggered by an UL grant on the UL BWP scheduled by the UL grant; transmitting an aperiodic SRS triggered by a first DL grant on the UL BWP when the PDSCH scheduled by the first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH; transmitting an aperiodic SRS triggered by a second DL grant on the UL MBS BWP when the PDSCH scheduled by the second DL grant is transmitted on the DL MBS BWP or the PDSCH is an MBS PDSCH; transmitting an aperiodic SRS triggered by a third DL grant on one of the UL BWP or the UL MBS BWP according to an indication of a field in the third DL grant; transmitting an aperiodic SRS triggered by a fourth DL grant on the UL BWP when a PDCCH carrying the fourth DL grant or a BWP indication field in the fourth DL grant indicates DL BWP on the DL BWP; when a PDCCH carrying a fifth DL grant or a BWP indication field in the fifth DL grant indicates DL MBS BWP on the DL MBS BWP, transmitting an aperiodic SRS triggered by the fifth DL grant on the UL MBS BWP; transmitting an aperiodic SRS triggered by the group common DCI on the UL BWP; or transmits an aperiodic SRS triggered by the group common DCI on the UL MBS BWP.
In some embodiments, in this example, the power control mode selector 426 may determine a type of PUCCH from among a plurality of PUCCH types; selecting one of a plurality of closed loop power control modes according to the determined type based on a semi-static configuration of the BS or based on system predefining; and transmitting the PUCCH to the BS via transmitter 412 based on the selected closed loop power control mode.
In some embodiments, the plurality of PUCCH types may be different in at least one of the following. First, each of the plurality of PUCCH types is used to carry HARQ feedback corresponding to PDSCH with different MBS priority. Second, each of the plurality of PUCCH types is used to carry HARQ feedback corresponding to PDSCH with a different MBS service type. Third, each of the plurality of PUCCH types is for carrying HARQ feedback having one of a plurality of different feedback types. The plurality of different feedback types includes 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 at least one of: the plurality of closed-loop power control modes corresponds 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 corresponds to absolute closed loop power control and cumulative closed loop power control for different PUCCH types; or the plurality of closed loop power control modes corresponds to closed loop power control and non-closed loop power control for different PUCCH types.
In some embodiments, the downlink control information analyzer 422 may receive and analyze a group common DCI for PUCCH closed-loop power control from the BS via the receiver 414. The set of common DCIs includes a single type indication field indicating a PUCCH type. All Transmit Power Control (TPC) values carried in the set of common DCI indicate the power control adjustment for that PUCCH type.
In some embodiments, the downlink control information generator 222 may receive and analyze a set of common DCI for PUCCH closed-loop power control from the BS via the receiver 414, wherein the set of 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 in which the type indication field is located in the set of common DCI. When a particular block does not contain a type indication field, the TPC value carried in that particular block indicates a power control adjustment for the default PUCCH type. The default PUCCH type is determined based on semi-static configuration of the BS or based on system pre-definition.
The various modules discussed above are coupled together by a bus system 430. The bus system 430 may include a data bus and may include, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It should be appreciated that the modules of the UE 400 may be operatively coupled to each other using any suitable techniques and media.
Although a number of individual modules or components are shown in fig. 4, one of ordinary skill in the art will appreciate that one or more modules may be combined or implemented together. For example, the processor 404 may implement not only the functions described above with respect to the processor 404, but also the functions described above with respect to the resource determiner 420. Rather, each module shown in fig. 4 may be implemented using a plurality of separate components or elements.
Fig. 5A illustrates a flowchart of a method 510 for MBS transmission performed by a UE (e.g., UE 400 in fig. 4) according to some embodiments of the present disclosure. In operation 511, the UE receives a configuration from the BS, the configuration indicating granularity of frequency domain resources related to MBS transmission to the UE. In operation 512, the UE determines the frequency domain resources 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 flowchart of another method 520 for power control performed by a UE (e.g., UE 400 in fig. 4) according to some embodiments of the present disclosure. In operation 521, the UE determines one Physical Uplink Control Channel (PUCCH) type among a plurality of PUCCH types. In operation 522, the UE selects one of a plurality of closed loop power control modes according to the determined type based on semi-static configuration of the BS or based on system predefining. In operation 523, the UE transmits the PUCCH to the BS 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.
Various embodiments of the present disclosure will now be described in detail below. Note that features of the embodiments and examples in this disclosure may be combined with each other in any manner without conflict.
The first embodiment describes how MBS RBG sizes are configured. In this embodiment, a Base Station (BS) (e.g., a gmodeb) configures not only a frequency domain resource range (or MBS PRB set) for MBS transmission of a User Equipment (UE) but also an RBG size for scheduling an MBS PDSCH for the UE through RRC signaling. The RBG size is the number of PRBs contained in the RBG.
When the BS schedules MBS transmissions using the UE-specific DCI, the BS will use the FDRA field in the UE-specific DCI to indicate the allocation of frequency domain resources within the MBS PRB set or within the entire DL BWP comprising the MBS PRB set. When using RBGs as granularity of frequency domain resource allocation, the BS will construct a specific indication value of the FDRA domain using RBGs adapted to the MBS PRB set as granularity. Thus, after receiving the UE-specific DCI, if the UE recognizes the UE-specific DCI scheduling MBS PDSCH, the UE parses 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 allocation granularity of MBS PDSCH frequency domain resources, the UE may parse the FDRA domain of the UE-specific DCI using RBGs matching the MBS PRB set. For example, a larger set of MBS PRBs with 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 an MBS PRB set or within the entire DL BWP depends on whether the UE-specific DCI schedules a unicast transmission or an MBS transmission. When the UE-specific DCI schedules MBS transmissions, the frequency domain resource allocation indicated by the UE-specific DCI is within an MBS PRB set; and when the UE-specific DCI schedules unicast transmission, the allocation of frequency domain resources indicated by the UE-specific DCI is within the entire DL BWP. In another example, the allocation of frequency domain resources indicated by the UE-specific DCI is always within the entire DL BWP. In either example, however, the RBG sizes corresponding to unicast transmissions and MBS transmissions may be different.
When the BS schedules MBS transmissions using the group common DCI, the BS indicates allocation of frequency domain resources within the MBS PRB set using the FDRA domain in the group common DCI. If RBGs are used as granularity for frequency domain resource allocation, the BS will construct a specific indication value of the FDRA domain using RBGs adapted to the MBS PRB set as granularity. Thus, after receiving the set of common DCI, if the UE recognizes the set of common DCI scheduling MBS PDSCH, the UE parses the FDRA domain in the set of common DCI based on the MBS PRB set. Further, if the BS instructs the UE to use the RBGs as allocation granularity of MBS PDSCH frequency domain resources, the UE may parse the FDRA domain of the set of common DCIs using the RBGs adapted to the MBS PRB set. For example, the RBG size adapted to the MBS PRB set may be smaller than the RBG size adapted to the entire DL BWP.
The MBS PRB set may be semi-statically configured by the BS for the UE. The MBS PRB set may include a portion of PRBs on DL BWP or may be full DL BWP dedicated to MBS transmission.
The second embodiment describes how the CSI reporting subbands are determined by the UE. In this embodiment, the BS configures not only a frequency domain resource range (or MBS PRB set) for MBS transmission of the UE, but also a subband size (or MBS subband size) of CSI for the MBS PRB set of the UE through RRC signaling. The subband size is the number of PRBs contained in a subband.
The BS configures at least one CSI report configuration for the UE through RRC signaling to obtain CSI on the MBS PRB set. The CSI reporting configuration comprises a series of parameter configurations related to CSI feedback. The configuration may include a CSI report frequency domain range configuration, which may include a subband size configuration and/or a CSI-reporting band configuration.
When the MBS PRB set is a subset of DL BWP configured by the BS to the UE, in a CSI reporting configuration for determining CSI on the MBS PRB set, the subband size is configured to be 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 subband size values corresponding to DL BWP and MBS subband size corresponding to MBS PRB set.
When the subband size in the CSI reporting configuration configured by the BS is the MBS subband size corresponding to the MBS PRB set, the CSI-reporting band configuration included in the CSI reporting configuration is for the range of the MBS PRB set, not for the entire range of DL BWP including the MBS PRB set. In one example, the CSI-reporting band is a bitmap, where each bit of the bitmap corresponds to an MBS subband, indicating whether the UE needs to measure and/or feedback CSI for the corresponding MBS subband. The wideband or subband indications may be included in a CSI reporting configuration. When the indication indicates wideband, it indicates that the UE feeds back one CSI for the entire MBS PRB set range, instead of one CSI for the entire DL BWP range. When the indication indicates subbands, it indicates that the UE feeds back one CSI for each MBS subband indicated by the CSI feedback bitmap in the MBS PRB set.
When the subband size in the CSI reporting configuration is a subband size value corresponding to DL BWP, the CSI-ReportingBand configuration included in the CSI reporting configuration is used for the entire DL BWP range. The CSI-reporting band is a bitmap, where each bit of the bitmap corresponds to a subband, indicating whether the UE needs to measure and/or feedback CSI for the corresponding subband. The wideband or subband indications may be included in a CSI reporting configuration. When the indication indicates wideband, it indicates that the UE feeds back one CSI for the entire DL BWP range. When the indication indicates a subband, it indicates that the UE feeds back one CSI for each subband indicated by the CSI feedback bitmap.
The third embodiment describes how UL BWP is configured for a UE supporting MBS transmission. According to the first mode of the present embodiment, the BS configures UL BWP and UL MBS BWP for the UE, but the UL BWP and UL MBS BWP are not activated at the same time. UL BWP and DL BWP configured for transmitting unicast PDSCH form a BWP pair. UL MBS BWP and DL MBS BWP configured for transmitting MBS PDSCH form another BWP pair.
In one example, when both DL BWP and DL MBS BWP are activated, only UL BWP is activated for UL transmission and UL MBS BWP is not activated for UL transmission. In another example, when DL MBS BWP is not activated and DL BWP is activated, UL MBS BWP is not activated for UL transmission, but UL BWP is activated for UL transmission. In another example, when DL MBS BWP is activated and DL BWP is not activated, UL MBS BWP is activated for UL transmission and UL BWP is not activated for UL transmission.
According to the second mode of the present embodiment, the BS configures UL BWP and UL MBS BWP for the UE, and the UL BWP and UL MBS BWP may be activated at the same time. UL BWP and DL BWP configured for transmitting unicast PDSCH form a BWP pair. UL MBS BWP and DL MBS BWP configured for transmitting MBS PDSCH form another BWP pair. When both UL BWP and UL MBS BWP are activated, the UE may determine whether to transmit an uplink channel or signal on UL BWP or UL MBS BWP.
In one example, for PUCCH carrying HARQ-ACK or NACK-only feedback, the UE may determine whether to transmit PUCCH on UL BWP or UL MBS BWP based on semi-static configuration of BS or based on system pre-definition based on at least one of the following methods. In one method, the UE may determine whether to transmit the PUCCH on UL BWP or UL MBS BWP according to the PDSCH corresponding to HARQ-ACK or NACK-only feedback. If the PDSCH is transmitted on DL BWP or the PDSCH is a unicast PDSCH, PUCCH carrying HARQ-ACK or NACK-only feedback is transmitted on UL BWP. If the PDSCH or PDSCH is a multicast PDSCH or PDSCH is a broadcast PDSCH is transmitted on DL MBS BWP, a PUCCH carrying HARQ-ACK or NACK-only feedback is transmitted on UL MBS BWP. In another method, the PUCCH carrying HARQ-ACK or NACK-only feedback is always sent on UL BWP. In another approach, the PUCCH carrying NACK-only feedback is always sent on UL MBS BWP.
In another example, for PUCCH carrying CSI reports, the UE may determine whether to transmit PUCCH on UL BWP or UL MBS BWP based on semi-static configuration of BS or based on system predefining based on at least one of the following methods. In one approach, the BS semi-statically configures on which BWP the CSI report is sent, where the CSI report may be configured to be sent on UL BWP or UL MBS BWP. In another approach, CSI reports are always sent on UL BWP, but not on 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 aperiodic SRS, the UE may determine whether to transmit the aperiodic SRS on UL BWP or UL MBS BWP based on at least one of a semi-static configuration of BS or based on system predefining. In one case, the aperiodic SRS triggered by the UL grant is transmitted on the UL BWP scheduled by the UL grant.
In another case, the aperiodic SRS triggered by the DL grant is transmitted on UL BWP or 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 or the PDSCH is a multicast PDSCH or the PDSCH is a broadcast PDSCH on the DL MBS BWP, the aperiodic SRS is transmitted on the UL MBS BWP.
In another case, the aperiodic SRS triggered by the DL grant is transmitted on UL BWP or 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 UL BWP or UL MBS BWP. This field may have a length of 1 bit to indicate both states.
In one example, when a PDCCH carrying a DL grant is transmitted on a DL BWP paired with an UL BWP, or when a BWP indication field in the DL grant indicates a DL BWP, an aperiodic SRS triggered by the DL grant is transmitted on the UL BWP. In another example, when a PDCCH carrying a DL grant is transmitted on a DL MBS BWP paired with a UL MBS BWP, or when a BWP indication field in the DL grant indicates the DL MBS BWP, an aperiodic SRS triggered by the DL grant is transmitted on the UL MBS BWP.
In another case, the aperiodic SRS triggered by the group common DCI, e.g., the aperiodic SRS triggered by DCI format 2_3, may be transmitted on UL BWP instead of UL MBS BWP.
The fourth embodiment describes how PUCCH power control is determined. For UEs supporting MBS services, multiple closed loop power control modes may be predefined by the system or semi-statically configured for the UE by the BS. The plurality of closed loop power control modes may be respectively applicable to different types of PUCCHs. According to different examples, various types of PUCCHs may be used to carry HARQ-ACK feedback corresponding to PDSCH with different MBS priorities; various types of PUCCHs may be used to carry HARQ-ACK feedback corresponding to PDSCH with different MBS service types; and various types of PUCCHs may also be used to carry different HARQ feedback types. At least one of the following HARQ feedback types may be provided: HARQ-ACK feedback, NACK-only feedback, HARQ-ACK feedback of MBS PDSCH, HARQ-ACK feedback of corresponding unicast PDSCH, and NACK-only feedback of MBS PDSCH. The plurality of closed loop power control modes may be designed according to at least one of the following methods.
According to one approach, a terminal independently maintains its own closed loop power control mode for different types of PUCCHs. For example, the terminal maintains L1 mode closed loop power control for PUCCH type 1; and maintains L2 mode closed loop power control for PUCCH type 2. L1 power control may include a set of power controls of { l=0 } or { l=0, 1 }. L2 power control may include a set of power controls of { l=0 } or { l=0, 1 }. L1 power control and L2 power control are performed independently, meaning that different sets of power control and/or different power control levels may be used for different PUCCH types. L1 and L2 closed loop power control may be applied to different PUCCH resources. PUCCH type 1 and PUCCH type 2 may be transmitted on different PUCCH resources.
According to another approach, the terminal maintains shared closed loop power control for different types of PUCCHs. For example, for PUCCH type 1 and PUCCH type 2, L1 mode closed loop power control is maintained. L1 power control may include a set of power controls of { l=0, 1} or { l=0, 1,2,3 }. When the L1 power control set is { l=0, 1}, PUCCH type 1 may perform power control using the power level { l=0 }, and PUCCH type 2 may perform power control using the power level { l=1 }. When the L1 power control set is { l=0, 1,2}, PUCCH type 1 may be power controlled using the power level { l=0, 1}, and PUCCH type 2 may be power controlled using the power level { l=2 }. When the L1 power control set is { l=0, 1,2,3}, PUCCH type 1 may be power controlled using the power level { l=0, 1}, and PUCCH type 2 may be power controlled using the power level { l=2, 3 }. PUCCH type 1 and PUCCH type 2 may be transmitted on the same PUCCH resource or different PUCCH resources.
According to another approach, PUCCH type 1 uses absolute closed loop power control, while PUCCH type 2 uses cumulative closed loop power control. For example, PUCCH type 1 may be PUCCH carrying NACK-only feedback. Also, PUCCH resources corresponding to PUCCH type 1 use absolute closed loop power control; and PUCCH resources corresponding to PUCCH type 2 use accumulated 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 PUCCH carrying NACK-only feedback. Further, PUCCH resources corresponding to PUCCH type 1 do not support closed loop power control, and a terminal may ignore Transmit Power Control (TPC) indications when transmitting PUCCH on these PUCCH resources. PUCCH resources corresponding to PUCCH type 2 support closed loop power control.
For a group common DCI transmitted by a BS for PUCCH closed loop power control, e.g., DCI format 2_2, the BS may add one or more type indication fields in the group common DCI to indicate which 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 adjustment of the same PUCCH type indicated by the type indication field. In another example, if the group common DCI indicates a plurality of type indication fields, each type indication field is valid only for TPC values contained in a block in which the type indication field is located. If the block does not contain a type indication field, the TPC value contained in the block indicates a closed loop power control adjustment for the default PUCCH type. The default PUCCH type may be predefined in the system or configured by the BS in semi-static mode.
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 limitation. Likewise, the various figures may depict exemplary architectures or configurations provided to enable those of ordinary skill in the art to understand the exemplary features and functions of the present disclosure. However, those skilled in the art will appreciate that the present disclosure is not limited to the example architectures or configurations shown, but may be implemented using a variety of alternative architectures and configurations. Furthermore, as will be appreciated by one of ordinary skill in the art, one or more features of one embodiment may 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 will be further understood that any reference herein to elements using designations such as "first," "second," etc. generally does not limit the number or order of such elements. Rather, these reference names may be used herein as a convenient means of distinguishing between two or more elements or multiple instances of an element. Thus, references to first and second elements do not mean that only two elements can be used or that the first element must somehow precede the second element.
Furthermore, those of ordinary skill in the art would understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, and symbols that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof, for example.
Those of ordinary skill in the art will further appreciate that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in connection with the aspects disclosed herein may be implemented with electronic hardware (e.g., digital, analog, or a combination of both), firmware, various forms of program or design code incorporating instructions (which may be referred to herein as "software" or "software modules" for convenience), 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 as a combination of such techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, modules, etc. may be configured to perform one or more of the functions described herein. The term "configured" 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.
Moreover, those of ordinary skill in the art will appreciate that the various illustrative logical blocks, units, devices, components, and circuits described herein may be implemented within or performed by an Integrated Circuit (IC) that may comprise 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. Logic blocks, modules, and circuits may also include antennas and/or transceivers to communicate with various components within the network or within the device. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, or state machine. A processor may 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, these functions may be stored on a computer-readable medium as one or more instructions or code. Thus, the steps of a method or algorithm disclosed herein may be embodied as software stored on a computer readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can transfer a computer program or code from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise 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. In addition, for purposes of discussion, the various modules are described as discrete modules; however, as will 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 in accordance with embodiments of the disclosure.
Additionally, memory or other storage and communication components may be used in embodiments of the present disclosure. It should be appreciated that for clarity, the above description has described embodiments of the disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality may be applied between different functional units, processing logic elements, or domains without departing from the present disclosure. For example, functions illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Thus, references to specific functional units are only references to suitable means for providing the functionality, and do not represent strict logical or physical structures 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 may be applied to other implementations without departing from the scope of this disclosure. Thus, the present disclosure is not limited to the implementations shown herein but is to be accorded the widest scope consistent with the novel features and principles disclosed herein as described in the following claims.

Claims (35)

1. A method performed by a wireless communication device, the method comprising:
receiving a configuration from a wireless communication node, the configuration indicating a granularity of frequency domain resources related to a multicast or broadcast service, MBS, transmission to the wireless communication device, wherein the granularity is determined based on a range of frequency domain resources of the MBS transmission; and
the frequency domain resources associated with the MBS transmission are determined based on the granularity.
2. The method according to claim 1, wherein:
the frequency domain resource range for the MBS transmission comprises an MBS physical resource block, PRB, set, the set comprising a first number of PRBs;
the granularity of the frequency domain resources corresponds to a resource block group, RBG, size, which is a second number of PRBs contained in each RBG, for scheduling an MBS physical downlink shared channel, PDSCH, for the wireless communication device; and
The second number is adjusted according to the first number.
3. The method of claim 2, further comprising:
receiving specific Downlink Control Information (DCI) specific to the wireless communication device from the wireless communication node;
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 an allocation of frequency domain resources in at least one of:
the MBS PRB set, or
And the downlink DL bandwidth part BWP of the MBS PRB set is included.
4. The method of claim 2, further comprising:
receiving, from the wireless communication node, set common downlink control information DCI directed to a set of wireless communication devices including the wireless communication device;
determining that the MBS PDSCH is scheduled by the set of common DCI; and
the frequency domain resource allocation, FDRA, field in the set of common DCIs is parsed to determine an allocation of frequency domain resources within the MBS PRB set based on the RBG size corresponding to the MBS PRB set.
5. The method according to claim 1, wherein:
the frequency domain resource range for the MBS transmission comprises an MBS physical resource block, PRB, set, the set comprising a first number of PRBs;
The granularity corresponds to a subband size, the subband size being a second number of PRBs contained in each subband, for determining, by the wireless communication device, channel state information CSI over the set of MBS PRBs; and
the second number is adjusted according to the first number.
6. The method according to claim 5, wherein:
the subband size is included in a CSI reporting configuration and is configured as one of at least three candidate values, including: at least two subband size values corresponding to downlink DL bandwidth portions BWP comprising the MBS PRB set, and at least one subband size value corresponding to the MBS PRB set.
7. The method according to claim 6, wherein:
the subband size is configured to a subband size value corresponding to a bandwidth that is at least one of the MBS PRB set or the DL BWP;
the CSI reporting configuration includes a bitmap corresponding to all subbands within the bandwidth;
each bit in the bitmap corresponds to a subband within a bandwidth and indicates whether the wireless communication device is reporting CSI for the corresponding subband; and
the CSI reporting configuration includes 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.
8. A method performed by a wireless communication device, the method comprising:
determining at least one active bandwidth portion BWP for uplink transmission from the wireless communication device to a wireless communication node in an uplink UL bandwidth portion BWP and UL multicast or broadcast service MBSBWP, wherein the at least one active BWP is determined based on at least one of the following:
when both downlink DL BWP and 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 BWP is activated for uplink transmission of the wireless communication device, and the UL MBS BWP is not activated,
when the DL BWP is not activated and the DL MBS BWP is activated, the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated, or
When both the DL BWP and the DL MBS BWP are activated, the UL BWP is activated for uplink transmission of the wireless communication device, and the UL MBS BWP is also activated.
9. The method of claim 8, further comprising:
When both the UL BWP and the UL MBS BWP are activated, for a physical uplink control channel, PUCCH, carrying hybrid automatic repeat request, HARQ, feedback corresponding to a physical downlink shared channel, PDSCH, the PUCCH is transmitted on one of the UL BWP or the UL MBS BWP, based on a semi-static configuration of the wireless communication node or based on system predefining, according to at least one of:
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 an 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 NACK-only feedback is always sent on the UL MBS BWP.
10. The method of claim 8, further comprising:
when both the UL BWP and the UL MBS BWP are activated, for a physical uplink control channel, PUCCH, carrying 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:
based on the semi-static configuration of the wireless communication node, the CSI report is sent on the UL BWP,
Based on the semi-static configuration of the wireless communication node, transmitting the CSI report on the UL MBS BWP,
based on system predefined, the CSI report is always sent on the UL BWP,
based on system pre-definition, the CSI report is always sent on the UL MBS BWP, or
The CSI report is transmitted on the UL BWP or UL MBS BWP depending on the type of the CSI report.
11. The method of claim 8, further comprising:
when both the UL BWP and the UL MBS BWP are activated, based on a semi-static configuration of the wireless communication node or based on system predefining, determining to transmit an aperiodic sounding reference signal, SRS, on one of the UL BWP or the UL MBS BWP according to at least one of:
an aperiodic SRS triggered by an UL grant is transmitted on the UL BWP scheduled by the UL grant,
when a physical downlink shared channel PDSCH scheduled by a first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, an aperiodic SRS triggered by the first DL grant is transmitted on the UL BWP,
when a PDSCH scheduled by a second DL grant is transmitted on the DL MBS BWP or the PDSCH is an MBS PDSCH, an aperiodic SRS triggered by the second DL grant is transmitted on the UL MBS BWP,
Transmitting an aperiodic SRS triggered by a third DL grant on one of the UL BWP or the UL MBS BWP according to an indication of a field in the third DL grant,
when a physical downlink control channel PDCCH carrying a fourth DL grant or a BWP indication field in the fourth DL grant is transmitted on the DL BWP, indicating DL BWP, an aperiodic SRS triggered by the fourth DL grant is transmitted on the UL BWP,
when a PDCCH carrying a fifth DL grant or a BWP indication field in the fifth DL grant indicates DL MBS BWP on the DL MBS BWP, an aperiodic SRS triggered by the fifth DL grant is transmitted on the UL MBS BWP,
transmitting aperiodic SRS triggered by group common DCI on the UL BWP, or
And sending the aperiodic SRS triggered by the group public DCI on the UL MBS BWP.
12. A method performed by a wireless communication device, the method comprising:
determining one PUCCH type in a plurality of Physical Uplink Control Channel (PUCCH) types;
selecting one of a plurality of closed loop power control modes according to the determined type based on a semi-static configuration of the wireless communication node or based on system predefining; and
the PUCCH is transmitted to the wireless communication node based on the selected closed loop power control mode.
13. The method of claim 12, wherein the plurality of PUCCH types are different in at least one of:
each of the plurality of PUCCH types is configured to carry HARQ feedback corresponding to a PDSCH of a physical downlink shared channel having a different MBS priority;
each of the plurality of PUCCH types is used to carry HARQ feedback corresponding to PDSCH with a different MBS service type; or alternatively
Each of the plurality of PUCCH types is for carrying HARQ feedback having one of a plurality of different feedback types, wherein the plurality of different feedback types includes at least one of: HARQ acknowledgement HARQ-ACK feedback, HARQ-ACK feedback of MBS PDSCH, HARQ-ACK feedback of unicast PDSCH, negative acknowledgement only NACK-only feedback, or NACK-only feedback of MBS PDSCH.
14. The method of claim 12, wherein the plurality of closed loop power control modes are different in at least one of:
the plurality of closed-loop power control modes corresponds 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 corresponds to absolute closed loop power control and cumulative closed loop power control for different PUCCH types; or alternatively
The plurality of closed loop power control modes corresponds to closed loop power control and non-closed loop power control for different PUCCH types.
15. The method of claim 12, further comprising:
receiving a group common DCI for PUCCH closed-loop power control from the wireless communication node, 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 the power control adjustment of the PUCCH type.
16. The method of claim 12, further comprising:
receiving a group common DCI for PUCCH closed-loop power control from the wireless communication node, 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 in which the type indication field is located in the group common DCI, and
when a particular block does not contain a type indication field, the TPC value carried in the particular block indicates a power control adjustment for a default PUCCH type, wherein the default PUCCH type is determined based on a semi-static configuration of the wireless communication node or based on system predefining.
17. A method performed by a wireless communication node, the method comprising:
transmitting a configuration to a wireless communication device, the configuration indicating a granularity of frequency domain resources related to a multicast or broadcast service MBS transmission to the wireless communication device,
wherein the granularity is determined based on a frequency domain resource range of the MBS transmission, and
wherein the frequency domain resources associated with the MBS transmission are determined based on the granularity.
18. The method according to claim 17, wherein:
the frequency domain resource range for the MBS transmission comprises an MBS physical resource block, PRB, set, the set comprising a first number of PRBs;
the granularity of the frequency domain resources corresponds to a resource block group, RBG, size, which is a second number of PRBs contained in each RBG, for scheduling an MBS physical downlink shared channel, PDSCH, for the wireless communication device; and
the second number is adjusted according to the first number.
19. The method of claim 18, further comprising:
transmitting specific Downlink Control Information (DCI) 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 allocation of frequency domain resources in at least one of: the MBS PRB set or a downlink DL bandwidth part BWP comprising the MBS PRB set.
20. The method of claim 18, further comprising:
transmitting to the wireless communication device a set of common downlink control information DCI directed to a set of wireless communication devices including the wireless communication device, wherein,
the MBS PDSCH is scheduled by the group public DCI, and
a frequency domain resource allocation, FDRA, field in the set of common DCIs indicates an allocation of frequency domain resources within the MBS PRB set based on the RBG size corresponding to the MBS PRB set.
21. The method according to claim 17, wherein:
the frequency domain resource range for the MBS transmission comprises an MBS physical resource block, PRB, set, the set comprising a first number of PRBs;
the granularity corresponds to a subband size, the subband size being a second number of PRBs contained in each subband, for determining, by the wireless communication device, channel state information CSI over the set of MBS PRBs; and
The second number is adjusted according to the first number.
22. The method according to claim 21, wherein:
the subband size is included in a CSI reporting configuration and is configured as one of at least three candidate values, including: at least two subband size values corresponding to downlink DL bandwidth portions BWP comprising the MBS PRB set, and at least one subband size value corresponding to the MBS PRB set.
23. The method according to claim 22, wherein:
the subband size is configured to a subband size value corresponding to a bandwidth that is at least one of the MBS PRB set or the DL BWP;
the CSI reporting configuration includes a bitmap corresponding to all subbands within the bandwidth;
each bit in the bitmap corresponds to a subband within a bandwidth and indicates whether the wireless communication device is reporting CSI for the corresponding subband; and
the CSI reporting configuration includes 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.
24. A method performed by a wireless communication node, the method comprising:
Configuring a wireless communication device with at least one of an uplink UL bandwidth part BWP and a UL multicast or broadcast service, MBSBWP, 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:
when both downlink DLBWP and 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 BWP is activated for uplink transmission of the wireless communication device, and the UL MBS BWP is not activated,
when the DL BWP is not activated and the DL MBS BWP is activated, the UL MBS BWP is activated for uplink transmission of the wireless communication device and the UL BWP is not activated, or
When both the DL BWP and the DL MBS BWP are activated, the UL BWP is activated for uplink transmission of the wireless communication device, and the UL MBS BWP is also activated.
25. The method according to claim 24, wherein:
when both the UL BWP and the UL MBS BWP are activated, for a physical uplink control channel, PUCCH, carrying hybrid automatic repeat request, HARQ, feedback corresponding to a physical downlink shared channel, PDSCH, the PUCCH is transmitted on one of the UL BWP or the UL MBS BWP, based on a semi-static configuration of the wireless communication node or based on system predefining, according to at least one of:
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 an 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 NACK-only feedback is always sent on the UL MBS BWP.
26. The method according to claim 24, wherein:
when both the UL BWP and the UL MBS BWP are activated, for a physical uplink control channel, PUCCH, carrying 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:
based on the semi-static configuration of the wireless communication node, the CSI report is sent on the UL BWP,
based on the semi-static configuration of the wireless communication node, transmitting the CSI report on the UL MBS BWP,
based on system predefined, the CSI report is always sent on the UL BWP,
based on system pre-definition, the CSI report is always sent on the UL MBS BWP, or
The CSI report is transmitted on the UL BWP or UL MBS BWP depending on the type of the CSI report.
27. The method according to claim 24, wherein:
when both the UL BWP and the UL MBS BWP are activated, based on a semi-static configuration of the wireless communication node or based on system predefining, determining to transmit an aperiodic sounding reference signal, SRS, on one of the UL BWP or the UL MBS BWP according to at least one of:
an aperiodic SRS triggered by an UL grant is transmitted on the UL BWP scheduled by the UL grant,
when a physical downlink shared channel PDSCH scheduled by a first DL grant is transmitted on the DL BWP or the PDSCH is a unicast PDSCH, an aperiodic SRS triggered by the first DL grant is transmitted on the UL BWP,
when a PDSCH scheduled by a second DL grant is transmitted on the DL MBS BWP or the PDSCH is an MBS PDSCH, an aperiodic SRS triggered by the second DL grant is transmitted on the UL MBS BWP,
transmitting an aperiodic SRS triggered by a third DL grant on one of the UL BWP or the UL MBS BWP according to an indication of a field in the third DL grant,
when a physical downlink control channel PDCCH carrying a fourth DL grant or a BWP indication field in the fourth DL grant is transmitted on the DL BWP, indicating DL BWP, an aperiodic SRS triggered by the fourth DL grant is transmitted on the UL BWP,
When a PDCCH carrying a fifth DL grant or a BWP indication field in the fifth DL grant indicates DL MBS BWP on the DL MBS BWP, an aperiodic SRS triggered by the fifth DL grant is transmitted on the UL MBS BWP,
transmitting aperiodic SRS triggered by group common DCI on the UL BWP, or
And sending the aperiodic SRS triggered by the group public DCI on the UL MBS BWP.
28. A method performed by a wireless communication node, the method comprising:
a physical uplink control channel, PUCCH, based on a closed loop power control mode is received from a wireless communication device, wherein,
selecting the closed loop power control mode from a plurality of closed loop power control modes according to the type of the PUCCH based on a semi-static configuration of the wireless communication node or based on system predefining, and
the type of the PUCCH is determined among a plurality of PUCCH types.
29. The method of claim 28, wherein the plurality of PUCCH types are different in at least one of:
each of the plurality of PUCCH types is configured to carry HARQ feedback corresponding to a PDSCH of a physical downlink shared channel having a different MBS priority;
Each of the plurality of PUCCH types is used to carry HARQ feedback corresponding to PDSCH with a different MBS service type; or alternatively
Each of the plurality of PUCCH types is for carrying HARQ feedback having one of a plurality of different feedback types, wherein the plurality of different feedback types includes at least one of: HARQ acknowledgement HARQ-ACK feedback, HARQ-ACK feedback of MBS PDSCH, HARQ-ACK feedback of unicast PDSCH, negative acknowledgement only NACK-only feedback, or NACK-only feedback of MBS PDSCH.
30. The method of claim 28, wherein the plurality of closed loop power control modes are different in at least one of:
the plurality of closed-loop power control modes corresponds 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 corresponds to absolute closed loop power control and cumulative closed loop power control for different PUCCH types; or alternatively
The plurality of closed loop power control modes corresponds to closed loop power control and non-closed loop power control for different PUCCH types.
31. The method of claim 28, further comprising:
transmitting a group common DCI for PUCCH closed-loop power control to the wireless communication device, 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 the power control adjustment of the PUCCH type.
32. The method of claim 28, further comprising:
transmitting a group common DCI for PUCCH closed-loop power control to the wireless communication device, 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 in which the type indication field is located in the group common DCI, and
when a particular block does not contain a type indication field, the TPC value carried in the particular block indicates a power control adjustment for a default PUCCH type, wherein the default PUCCH type is determined based on a semi-static configuration of the wireless communication node or based on system predefining.
33. A wireless communication device configured to perform the method of any of claims 1 to 16.
34. A wireless communication node configured to perform the method of any of claims 17 to 32.
35. A non-transitory computer readable medium storing computer executable instructions for performing the method of any one of claims 1 to 32.
CN202180090726.7A 2021-01-15 2021-01-15 Method, apparatus and system for multicast or broadcast transmission Pending CN116724627A (en)

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