SYSTEM AND METHOD FOR DETERMINING DOWNLINK CONTROL INFORMATION - Patent application

Abstract

A system and method for determining downlink control information is presented. A wireless communication device can receive downlink signaling from a wireless communication node, the downlink signaling including a first indication field and a second indication field. The wireless communication device can simultaneously transmit a first Physical Uplink Shared Channel (PUSCH) transmission and a second PUSCH transmission. The first PUSCH transmission can be indicated by the first indication field. The second PUSCH transmission can be indicated by one of the first indication field or the second indication field.

Description

[Technical Field]

[0001] Technical Field The present disclosure relates generally to wireless communications, including, but not limited to, systems and methods for determining downlink control information for simultaneous physical uplink shared channel (PUSCH) transmissions in multi-transmit / receive point (TRP) operation. [Background technology]

[0002] background The 3rd Generation Partnership Project (3GPP®), a standards organization, is currently specifying a new air interface called 5G New Radio (5G NR) and the Next Generation Packet Core Network (NG-CN or NGC). 5G NR will have three main components: the 5G Access Network (5G-AN), the 5G Core Network (5GC), and the User Equipment (UE). To facilitate the enablement of different data services and requirements, the elements of the 5GC, also called network functions, have been simplified; some of them are software-based and some are hardware-based, so that they can be adapted as needed. Summary of the Invention [Means for solving the problem]

[0003] overview The exemplary embodiments disclosed herein are directed to solving problems associated with one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent from a review of the following detailed description in conjunction with the accompanying drawings. In accordance with various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. It will be understood, however, that these embodiments are presented by way of example, and not limitation, and that various modifications to the disclosed embodiments can be made while remaining within the scope of the present disclosure, as will be apparent to those skilled in the art upon reading this disclosure.

[0004] At least one aspect is directed to a system, method, apparatus, or computer-readable medium. A wireless communication device may receive downlink signaling from a wireless communication node, the downlink signaling including a first indication field and a second indication field. The wireless communication device may simultaneously transmit a first Physical Uplink Shared Channel (PUSCH) transmission and a second PUSCH transmission. The first PUSCH transmission may be indicated by the first indication field. The second PUSCH transmission may be indicated by one of the first indication field or the second indication field.

[0005] In some embodiments, the first PUSCH transmission and the second PUSCH transmission may be associated with different transmission layers. The first PUSCH transmission and the second PUSCH transmission may fully or partially overlap each other in at least one of the frequency domain or the time domain. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective beam state or a respective spatial relationship. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective sounding reference signal (SRS) resource set.

[0006] In some embodiments, the first PUSCH transmission and the second PUSCH transmission may be associated with one or more identical transmission layers or demodulation reference signal (DMRS) ports. The first PUSCH transmission and the second PUSCH transmission may fully or partially overlap each other in at least one of the frequency domain or the time domain. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective beam state or a respective spatial relationship. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective sounding reference signal (SRS) resource set.

[0007] In some embodiments, each of the first PUSCH transmission and the second PUSCH transmission can be configured as a codebook-based PUSCH transmission. The first indication field can be a first transmit precoding matrix indication (TPMI) field indicating a precoder and transmission layer for the first PUSCH transmission. The second indication field can be a second TPMI field indicating a precoder and transmission layer for the second PUSCH transmission.

[0008] In some embodiments, the bit width of the first TPMI field may be determined based on at least one of the following: a maximum transmission rank of the first PUSCH transmission, a number of antenna ports for the first PUSCH transmission, a mode of uplink full power transmission for the first PUSCH transmission, or a maximum coherence of antenna ports for the first PUSCH transmission. The bit width of the second TPMI field may be determined based on at least one of the following: a maximum transmission rank of the second PUSCH transmission, a number of antenna ports for the second PUSCH transmission, a mode of uplink full power transmission for the second PUSCH transmission, or a maximum coherence of antenna ports for the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to “0” may be inserted into the first TPMI field or the second TPMI field.

[0009] In some embodiments, the first indication field may be a first SRS resource indicator (SRI) field indicating for the first PUSCH transmission. The second indication field may be a second SRI field indicating for the second PUSCH transmission. A bit width of the first SRI field may be determined based on the number of SRS resources configured for the first PUSCH transmission. A bit width of the second SRI field may be determined based on the number of SRS resources configured for the second PUSCH transmission.

[0010] In some embodiments, each of the first PUSCH transmission and the second PUSCH transmission may be configured as a non-codebook-based PUSCH transmission. The first indication field may be a first SRS resource indicator (SRI) field indicating for the first PUSCH transmission. The second indication field may be a second SRI field indicating for the second PUSCH transmission. A bit width of the first SRI field may be determined based on at least one of the number of SRS resources or the maximum number of transmission layers configured for the first PUSCH transmission. A bit width of the second SRI field may be determined based on at least one of the number of SRS resources or the maximum number of transmission layers configured for the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to '0' may be inserted into the first SRI field or the second SRI field.

[0011] In some embodiments, the first indication field may be a first transmit precoding matrix indication (TPMI) field indicating a precoder and transmission layer for the first PUSCH transmission or the second PUSCH transmission. The second indication field may be a second TPMI field indicating a precoder and transmission layer for the second PUSCH transmission. The bit width of the first TPMI field may be determined based on at least one of a maximum transmission rank of the first PUSCH transmission or the second PUSCH transmission, a number of antenna ports for the first PUSCH transmission or the second PUSCH transmission, a mode of uplink full power transmission for the first PUSCH transmission or the second PUSCH transmission, or a maximum coherence of antenna ports for the first PUSCH transmission or the second PUSCH transmission. The bit width of the second TPMI field may be determined based on at least one of the following: a maximum transmission rank of the second PUSCH transmission or the second PUSCH transmission, a number of antenna ports for the second PUSCH transmission or the second PUSCH transmission, a mode of uplink full power transmission for the second PUSCH transmission or the second PUSCH transmission, or a maximum coherence of antenna ports for the second PUSCH transmission or the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to “0” may be inserted into the first TPMI field or the second TPMI field.

[0012] In some embodiments, the first indication field may be a first SRS resource indicator (SRI) field configured for the first PUSCH transmission or the second PUSCH transmission. The second indication field may be a second SRI field configured for the second PUSCH transmission. A bit width of the first SRI field may be determined based on the number of SRS resources configured for the first PUSCH transmission or the second PUSCH transmission. A bit width of the second SRI field may be determined based on the number of SRS resources configured for the second PUSCH transmission.

[0013] In some embodiments, the first indication field may be a first SRS resource indicator (SRI) field indicating regarding the first PUSCH transmission or the second PUSCH transmission. The second indication field may be a second SRI field indicating regarding the second PUSCH transmission. A bit width of the first SRI field may be determined based on the number of SRS resources configured for the first PUSCH transmission or the second PUSCH transmission. A bit width of the second SRI field may be determined based on the number of SRS resources configured for the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to '0' may be inserted into the first SRI field or the second SRI field. [Brief explanation of the drawings]

[0014] BRIEF DESCRIPTION OF THE DRAWINGS Various exemplary embodiments of the present solution will be described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and merely depict exemplary embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered to limit the breadth, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.

[0015] [Figure 1] FIG. 1 illustrates an exemplary cellular communication network in which the techniques disclosed herein may be implemented, according to embodiments of the present disclosure.

[0016] [Figure 2] FIG. 2 illustrates a block diagram of an exemplary base station and user equipment device in accordance with some embodiments of the present disclosure.

[0017] [Figure 3] FIG. 3 illustrates an example implementation of simultaneous PUSCH transmissions scheduled by a single DCI based on a spatial domain modulation (SDM) scheme, in accordance with some embodiments of the present disclosure.

[0018] [Figure 4] FIG. 4 illustrates an example implementation of simultaneous PUSCH transmissions scheduled by a single DCI based on a single frequency network (SFN) scheme, in accordance with some embodiments of the present disclosure.

[0019] [Figure 5] FIG. 5 illustrates a flow diagram of an example method for determining downlink control information, according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0020] Detailed Description 1. Mobile communication technology and environment 1 illustrates an exemplary wireless communication network and / or system 100 in which the techniques disclosed herein may be implemented, according to embodiments of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of Things (NB-IoT) network, and is referred to herein as “network 100.” Such exemplary network 100 includes a base station 102 (hereinafter “BS 102,” also referred to as a wireless communication node) and a user equipment device 104 (hereinafter “UE 104,” also referred to as a wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel), and a cluster of cells 126, 130, 132, 134, 136, 138, and 140 that overlap a geographic region 101. In FIG. 1, the BS 102 and the UE 104 are contained within the respective geographic boundaries of the cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station operating in its assigned bandwidth to provide adequate radio coverage to intended users.

[0021] For example, the BS 102 may operate within an assigned channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via a downlink radio frame 118 and an uplink radio frame 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127, which may include data symbols 122 / 128. In this disclosure, the BS 102 and the UE 104 are generally described herein as non-limiting examples of “communication nodes” capable of implementing the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communication in accordance with various embodiments of the present solution.

[0022] 2 illustrates a block diagram of an exemplary wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) in accordance with some embodiments of the present solution. System 200 may include components and elements configured to support known or conventional operational features that need not be described in detail herein. In one exemplary embodiment, system 200 may be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment, such as wireless communication environment 100 of FIG. 1, as described above.

[0023] The system 200 generally includes a base station 202 (hereinafter "BS 202") and a user equipment device 204 (hereinafter "UE 204"). The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each of which is coupled and interconnected as needed via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each of which is coupled and interconnected as needed via a data communication bus 240. The BS 202 communicates with the UE 204 over a communication channel 250, which may be any wireless channel or other medium suitable for the transmission of data as described herein.

[0024] As will be appreciated by those skilled in the art, system 200 may further include any number of modules other than those shown in FIG. 2 . Those skilled in the art will appreciate that the various exemplary blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this compatibility and adaptability of hardware, firmware, and software, the various exemplary components, blocks, modules, circuits, and steps have been described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software may depend on the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a manner suitable for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.

[0025] According to some embodiments, the UE transceiver 230 may be referred to herein as an “uplink” transceiver 230 that includes a radio frequency (RF) transmitter and an RF receiver, each with circuitry coupled to an antenna 232. Alternatively, a duplexing switch (not shown) may couple the uplink transmitter or receiver to the uplink antenna in a time-duplexed manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred to herein as a “downlink” transceiver 210 that includes an RF transmitter and an RF receiver, each with circuitry coupled to an antenna 212. Alternatively, a downlink duplexing switch may couple the downlink transmitter or receiver to the downlink antenna 212 in a time-duplexed manner. The operation of the two transceiver modules 210 and 230 may be coordinated in time such that the downlink transmitter is coupled to the downlink antenna 212 while the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250. Conversely, the operation of the two transceivers 210 and 230 may be coordinated in time such that the uplink transmitter is coupled to the uplink antenna 232 at the same time that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250. In some embodiments, there is strict time synchronization with a minimum guard time between changes in duplex direction.

[0026] The UE transceiver 230 and the base station transceiver 210 are configured to communicate over a wireless data communication link 250 and cooperate with appropriately configured RF antenna apparatus 212 / 232 capable of supporting a particular wireless communication protocol and modulation scheme. In some exemplary embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as Long Term Evolution (LTE) and emerging 5G standards. However, it will be understood that the present disclosure is not necessarily limited in application to a particular standard and associated protocol. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternative or additional wireless data communication protocols, including future standards or variants thereof.

[0027] According to various embodiments, the BS 202 may be, for example, an evolved node B (eNB), a serving eNB, a target eNB, a femto station, or a pico station. In some embodiments, the UE 204 may be embodied in various types of user devices, such as a mobile phone, a smartphone, a personal digital assistant (PDA), a tablet, a laptop computer, a wearable computing device, etc. The processor modules 214 and 236 may be implemented or realized using a general-purpose processor, an associative memory, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. As such, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, etc. A processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a digital signal processor core, or any other such configuration.

[0028] Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, firmware, a software module executed by processor modules 214 and 236, respectively, or any practical combination thereof. Memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to processor modules 210 and 230, respectively, such that processor modules 210 and 230 can read information from and write information to memory modules 216 and 234, respectively. Memory modules 216 and 234 may also be integrated into respective processor modules 210 and 230. In some embodiments, memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions executed by processor modules 210 and 230, respectively.

[0029] The network communications module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bidirectional communications between the base station transceiver 210 and other network components and communications nodes configured to communicate with the base station 202. For example, the network communications module 218 may be configured to support Internet or WiMAX traffic. In a typical deployment, without limitation, the network communications module 218 provides an 802.3 Ethernet interface to enable the base station transceiver 210 to communicate with conventional Ethernet-based computer networks. As such, the network communications module 218 may include a physical interface for connecting to a computer network (e.g., a mobile switching center (MSC)). As used herein with respect to a specified operation or function, the terms “configured for,” “configured to,” and conjugations thereof refer to devices, components, circuits, structures, machines, signals, etc. that are physically constructed, programmed, formatted, and / or arranged to perform the specified operation or function.

[0030] The Open Systems Interconnection (OSI) model (referred to herein as the "Open Systems Interconnection Model") is a conceptual and logical layout that defines network communications used by systems (e.g., wireless communication devices, wireless communication nodes) that are open to interconnection and communication with other systems. The model is divided into seven subcomponents or layers, each of which represents a conceptual collection of services provided to its higher and lower layers. The OSI model also defines logical networks and effectively describes computer packet transfers through the use of different layer protocols. The OSI model may also be referred to as the seven-layer OSI model or seven-layer model. In some embodiments, layer 1 may be the physical layer. In some embodiments, layer 2 may be the medium access control (MAC) layer. In some embodiments, layer 3 may be the radio link control (RLC) layer. In some embodiments, layer 4 may be the packet data convergence protocol (PDCP) layer. In some embodiments, layer 5 may be the radio resource control (RRC) layer. In some embodiments, layer 6 may be a non-access stratum (NAS) layer or an Internet Protocol (IP) layer, and layer 7 is some other layer.

[0031] To enable those skilled in the art to make and use the present solution, various exemplary embodiments of the present solution are described below with reference to the accompanying drawings. As will be apparent to those skilled in the art, after reading this disclosure, various changes or modifications can be made to the examples described herein without departing from the scope of the present solution. Thus, the present solution is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, any specific order or hierarchy of steps in the methods disclosed herein is merely an example approach. Based on design preferences, the specific order or hierarchy of steps in a disclosed method or process can be rearranged while remaining within the scope of the present solution. Thus, those skilled in the art will appreciate that the methods and techniques disclosed herein present various steps or operations in a sample order, and the present solution is not limited to the specific order or hierarchy presented, unless otherwise specified.

[0032] 2. SYSTEM AND METHOD FOR DETERMINING DOWNLINK CONTROL INFORMATION FOR SIMULTANEOUS PUSCH TRANSMISSIONS IN MULTI-TRP OPERATION In a 5G NR system, in addition to single transmit / receive point (STRP) operation, several transmission schemes of multi-transmit / receive point (MTRP) operation for uplink (UL) transmission may be supported to improve the reliability and throughput of the UL channel or signal. However, due to current UE capability constraints, even if a UE is equipped with more than one panel, multiple uplink transmissions can only be performed as non-overlapping in the time domain, which may become a bottleneck for the reliability and throughput of the entire system, given that multi-TRP-based uplink transmissions may be supported.

[0033] With the evolution of mobile communication technology, a UE equipped with multiple panels can support more than one uplink transmission simultaneously. On the other hand, due to different channel conditions of the links between the multiple panels of a UE and multiple TRPs during MTRP operation, some transmission parameters (e.g., transmission precoders or spatial relationship indications) may be dedicated between the panels and TRPs for better performance. Furthermore, for scheduling flexibility, support for dynamic switching between a single TRP and MTRP can be considered. Furthermore, the bit size of the indication field in the DCI may vary depending on different cases, as it is determined by the radio resource control (RRC) configuration and UE capability report. This can result in dynamically changing but avoidable DCI overhead.

[0034] Based on the above discussion, it may be necessary to address some specific issues in the case of simultaneous uplink transmissions towards different TRPs across multiple UE panels, including (i) how to determine the maximum bit size of the indication field in the DCI for simultaneous physical uplink shared channel (PUSCH) transmissions based on the subscriber data management (SDM) scheme in MTRP operation, or (ii) how to determine the maximum bit size of the indication field in the DCI for simultaneous system frame number (SFN) scheme-based PUSCH transmissions in MTRP operation.

[0035] Because a PUSCH transmission is intended for only a single TRP, the UE can use the same indicated information for repeated transmissions across multiple slots, which means that each of these transmissions can use the same spatial relationship and transmit precoder. Both codebook-based and non-codebook-based PUSCH transmissions can be supported.

[0036] For codebook-based PUSCH transmission, the PUSCH can be scheduled by downlink control information (DCI) (e.g., DCI format 0_0, DCI format 0_1, or DCI format 0_2) or radio resource control (RRC) signaling (e.g., higher-layer parameter ConfiguredGrantConfig). The UE can determine its PUSCH transmit precoder based on a sounding reference signal (SRS) resource indicator (SRI), a transmit precoding matrix indicator (TPMI), and / or a transmission rank. The SRI, TPMI, and / or transmission rank can be provided by several fields in the DCI (e.g., an SRS resource indicator field, a second SRS resource indicator field, a second precoding information and number of layers field, or a precoding information and number of layers field) or by several higher-layer parameters in the RRC signaling (e.g., srs-ResourceIndicator, srs-ResourceIndicator2, precodingAndNumberOfLayers, or precodingAndNumberOfLayers2).

[0037] For non-codebook-based PUSCH transmission, in contrast to codebook-based schemes, a UE can determine its precoder and transmission rank based on the SRI when multiple sounding reference signal (SRS) resources are configured in an SRS resource set. The SRI may be provided by an SRS resource indicator in the DCI. Specifically, the UE may use one or more SRS resources for SRS transmission within an SRS resource set. The maximum number of SRS resources and the maximum number of SRS resources that a UE can be configured for simultaneous transmission within the same symbol may be a UE capability. Simultaneously transmitted SRS resources may occupy the same RB. In some embodiments, only one SRS port may be configured for each SRS resource. In some embodiments, only one SRS resource set may be configured using the higher layer parameter SRS-ResourceSet set to "nonCodebook." The maximum number of SRS resources in one SRS resource set that can be configured for non-codebook-based PUSCH transmission may be four. The indicated SRI in slot n may be associated with the most recent transmission on the SRS resource(s) identified by the SRI. The SRS transmission can occur before the PDCCH carries the SRI. The UE can then calculate the precoder to be used for the SRS transmission based on measurements of the associated non-zero power (NZP) channel status information reference signal (CSI-RS) resource. The UE's selection of the precoder (and number of layers) for each scheduled PUSCH can be modified by the network (if multiple SRS resources are configured). The UE can transmit the PUSCH using the same antenna port as the SRS port(s) in the SRS resource(s) indicated by the SRI given by the DCI.

[0038] 5G NR can include several multiple-input / multiple-output (MIMO) features that facilitate the use of multiple antenna elements at base stations for both the sub-6 GHz (frequency range 1, FR1) and above-6 GHz (frequency range 2, FR2) frequency bands, as well as one MIMO feature that supports multi-TRP operation. The key point of this feature may be cooperation with multiple TRPs to transmit or receive data by a UE to improve transmission performance. As NR is in the process of commercialization, various aspects that require further refinement from real-world deployment scenarios may be recognized. In some embodiments, simultaneous uplink transmission can be supported and implemented by a multi-panel UE in multi-TRP (MTRP) operation, which may be beneficial for improving the throughput of uplink transmissions.

[0039] Furthermore, simultaneous physical uplink shared channel (PUSCH) transmissions scheduled by a single downlink control information (DCI) based on spatial domain modulation (SDM) in MTRP operation can be introduced and implemented in 5G NR (as shown in Figure 3). During MTRP operation (e.g., both T1 and T2 are closed), different layers of the PUSCH are transmitted on different TRPs and associated with different SRS resource sets. The precoder, rank, and / or selected SRS resource(s) of the PUSCH transmitted from each panel can be indicated by the first and second TPMI / SRI fields, respectively. When the UE switches to STRP operation (e.g., either T1 or T2 is closed), the PUSCH transmitted from one panel can be associated with one SRS resource set. The precoder, rank, and / or selected SRS resource(s) for the PUSCH transmitted from one panel may be indicated by the first or second transmit precoding matrix index (TPMI) / SRI field.

[0040] Furthermore, simultaneous PUSCH transmissions scheduled by a single DCI based on a single frequency network (SFM) scheme during MTRP operation can be introduced and implemented in 5G NR (as shown in Figure 4). During MTRP operation (e.g., both T1 and T2 are closed), all the same layer / DMRS ports of one PUSCH can be transmitted simultaneously from different UE panels toward different TRPs. Furthermore, these PUSCH transmissions can be associated with different SRS resource sets. The precoder, rank, and / or selected SRS resource(s) for each PUSCH transmission from each panel can be indicated by the first and second TPMI / SRI fields, respectively. When the UE switches to STRP operation (e.g., either T1 or T2 is closed), PUSCH transmissions can be from one panel and associated with one SRS resource set. The precoder, rank, and / or selected SRS resource(s) for the PUSCH transmitted from one panel may be indicated by the first or second TPMI / SRI field.

[0041] In some embodiments, a "simultaneous uplink transmission scheme" can equate to multiple uplink transmissions that can fully or partially overlap in the time domain. The simultaneous uplink transmissions can be associated with different panel / TRP IDs. These simultaneous uplink transmissions can be scheduled by a single DCI or multiple DCIs. Alternatively, whether the UE supports the "simultaneous uplink transmission scheme" can be reported as a UE optional capability.

[0042] In some embodiments, a "TRP" may correspond to at least one of an SRS resource set, a spatial relationship, a power control parameter set, a transmission configuration indicator (TCI) state, a CORESET, a CORESETPoolIndex, a physical cell index (PCI), a subarray, a code division multiplexing (CDM) group of DMRS ports, a group of CSI-RS resources, or a channel measurement resource (CMR) set.

[0043] In some embodiments, a "UE panel" may correspond to at least one of a UE capability value set, an antenna group, an antenna port group, a beam group, a subarray, an SRS resource set, a spatial relationship, a group of DMRS ports, a CDM group, or a panel mode.

[0044] In some embodiments, the definition of a “beam state” may correspond to at least one of a quasi-collocation (QCL) state, a transmission configuration indicator (TCI) state, a spatial relationship (or spatial relationship information), a reference signal (RS), a spatial filter, and / or precoding. Furthermore, a “beam state” may also be referred to as a “beam.”

[0045] The definition of "Tx beam" may correspond to at least one of a QCL state, a TCI state, a spatial relationship state, a DL reference signal, a UL reference signal, a Tx spatial filter, or a Tx precoding. The definition of "Rx beam" may correspond to at least one of a QCL state, a TCI state, a spatial relationship state, a spatial filter, an Rx spatial filter, or a Rx precoding. The definition of "beam ID" may correspond to at least one of a QCL state index, a TCI state index, a spatial relationship state index, a reference signal index, a spatial filter index, or a precoding index.

[0046] The spatial filter may be either on the UE side or on the gNB side. The spatial filter may also be referred to as a spatial domain filter. The "spatial relationship" may include one or more reference RSs used to represent the same or quasi-identical "spatial relationship" between the target "RS or channel" and one or more reference RSs. The "spatial relationship" may refer to at least one of a beam, a spatial parameter, or a spatial domain filter.

[0047] A "QCL state" may include one or more reference RSs and their corresponding QCL type parameters. The QCL type parameters may include at least one of the following aspects or combinations: [1] Doppler spread, [2] Doppler shift, [3] delay spread, [4] average delay, [5] average gain, and [6] spatial parameters (also referred to as spatial Rx parameters). A "TCI state" may be equivalent to a "QCL state." The following definitions may exist for "QCL-TypeA," "QCL-TypeB," "QCL-TypeC," and "QCL-TypeD."

[0048] "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0049] "QCL-TypeB": {Doppler shift, Doppler spread}

[0050] "QCL-TypeC": {Doppler shift, average delay}

[0051] "QCL-TypeD": {Spatial Rx parameters}

[0052] In some embodiments, the RS may comprise / include a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal Block (SSB) (also referred to as SS / PBCH), a Demodulation Reference Signal (DMRS), a Sounding Reference Signal (SRS), and a Physical Random Access Channel (PRACH). Additionally, the RS may include / comprise at least a DL reference signal and / or an UL reference signaling.

[0053] The DL RS may include / comprise at least CSI-RS, SSB, and / or DMRS (e.g., DL DMRS). The UL RS may include / comprise at least SRS, DMRS (e.g., UL DMRS), and / or PRACH. The "UL signal" may be PUCCH, PUSCH, or SRS. The "DL signal" may be PDCCH, PDSCH, or CSI-RS.

[0054] The first SRS resource set and the second SRS resource set may have a lower srs-ResourceSetId and a higher srs-ResourceSetId, respectively, of two SRS resource sets configured by the higher layer parameter srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, and may be associated with an upper layer parameter use of the value “non-codebook” when txConfig=nonCodebook or “codebook” when txConfig=codebook. The PUSCH transmission may correspond to a PUSCH transmission opportunity. The TPMI field in the DCI may correspond to at least one of a precoding information and layer number field of the DCI or a second precoding information field of the DCI. The SRI field in the DCI may correspond to at least one of an SRS resource indicator field in the DCI or a second SRS resource indicator field in the DCI. The DCI may correspond to at least one of DCI format 0_1, DCI format 0_2, or DCI format 0_0.

[0055] Example 1-1: Determination of first and second TPMI fields in DCI for SDM-based simultaneous PUSCH transmission in MTRP operation under CB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0056] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use a different transmission layer. In some embodiments, a first PUSCH transmission may be associated with a first set of transmission layers. A second PUSCH transmission may be associated with a second set of transmission layers. In some embodiments, these PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. The PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. These PUSCH transmissions may be transmitted in the same or different RVs.

[0057] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship.

[0058] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0059] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0060] The UE may acquire / obtain one or more indications of the precoder and transmission layer to apply to these PUSCH transmissions based on the received DCI information. In some embodiments, a first indication of the precoder and transmission layer may be provided by a first TPMI field of the DCI.

[0061] The bit width of the first TPMI field may be determined according to at least one of the maximum transmission rank for the first PUSCH, the number of antenna ports for the second first PUSCH, the mode of UL full power transmission for the first PUSCH, or the maximum coherence of the antenna ports for the first PUSCH.

[0062] The maximum transmission rank may be configured by the higher layer parameter maxRank in pusch-Config for the first PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the first PUSCH scheduled with DCI format 0_2.

[0063] For the STRP transmission mode, the maximum transmission rank value can be configured to 1, 2, 3, or 4. For the SFN SDM transmission mode, the maximum transmission rank value can be configured to 1 or 2.

[0064] In some embodiments, the bit width of the first TPMI field is determined by the maximum value configured for the maximum transmission rank. In some embodiments, the value of the maximum transmission rank may be different for the STRP transmission mode and the SDM transmission mode. In some embodiments, the value of the maximum transmission rank of the SRS resource(s) in the SRS resource set may be different. Each or a set of SRS resources in the SRS resource set may be dedicated to the STRP transmission mode or the SFN SDM transmission mode. If the maximum transmission rank is dedicated to each transmission mode and the maximum transmission rank of a transmission mode is lower than the maximum transmission rank of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first TPMI field. If the maximum transmission rank is the same for different transmission modes, the value of the maximum transmission rank may be subject to UE capability reporting for the STRP transmission mode and the SDM transmission mode.

[0065] In some embodiments, the number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The number of antenna ports for SRS resources in one SRS resource set may be different when in STRP transmission mode or SDM transmission mode. The bit width of the first TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the first SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the first SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits with values ​​set to "0" may be inserted in the first TPMI field.

[0066] In some embodiments, the UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower," "fullpowerMode1," or "fullpowerMode2." The bit width of the first TPMI field can be determined by whether the UL full power mode is configured as "fullpowerMode1." The UL full power transmission mode can be configured with different values ​​for the STRP transmission mode and the SDM transmission mode. The STRP transmission mode and the SDM transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the UL full power transmission mode is configured as "fullpowerMode1" for only the STRP transmission mode or only the SDM transmission mode, some most significant bits with values ​​set to "0" can be inserted in the first TPMI field.

[0067] In some embodiments, the maximum coherence of an antenna port may depend on the UE capability report and may be configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of an antenna port may be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the first TPMI field may be determined by the configured value of the antenna port coherence. The maximum coherence of an antenna port may be configured with different values ​​for the STRP transmission mode and the SDM transmission mode. The STRP transmission mode and the SDM transmission mode may be indicated by an SRS resource set indicator field in the DCI. If the maximum coherence of an antenna port of a transmission mode is higher than the maximum coherence of an antenna port of another transmission mode, some most significant bits with values ​​set to "0" may be inserted in the first TPMI field.

[0068] In some embodiments, the second indication of the precoder and transmission layer can be provided by a second TPMI field of the DCI. The second indication of the precoder and transmission layer can be used for a second PUSCH associated with the second SRS resource set under the STRP transmission mode and the SDM transmission mode. The bit width of the second TPMI field can be determined according to at least one of a maximum transmission rank for the second PUSCH, a number of antenna ports for the second PUSCH, a mode of UL full power transmission for the second PUSCH, or a maximum coherence of antenna ports for the second PUSCH.

[0069] In some embodiments, the presence of the second TPMI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of a second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second TPMI field may not be present. If the second SRS resource set is not configured, the second TPMI field may not be present.

[0070] In some embodiments, the maximum transmission rank may be configured by the higher layer parameter maxRank in pusch-Config for the second PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the second PUSCH scheduled with DCI format 0_2.

[0071] For the STRP transmission mode, the value of the maximum transmission rank may be configured to be 1, 2, 3, or 4. For the SFN transmission mode, the value of the maximum transmission rank may be configured to be 1 or 2. The bit width of the second TPMI field may be determined by the maximum value configured for the maximum transmission rank. The value of the maximum transmission rank may be different for the STRP transmission mode and the SDM transmission mode. The values ​​of the maximum transmission rank of the SRS resource(s) in an SRS resource set may be different.

[0072] Each or a set of SRS resources in the SRS resource set can be dedicated to the STRP transmission mode or the SFN transmission mode. If a maximum transmission rank is dedicated to each transmission mode and the maximum transmission rank of a transmission mode is lower than the maximum transmission rank of another transmission mode, some most significant bits with a value set to "0" can be inserted into the first TPMI field. If the maximum transmission rank is the same for different transmission modes, the maximum transmission rank value can be subject to UE capability reporting for the STRP transmission mode and the SDM transmission mode.

[0073] In some embodiments, the number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The number of antenna ports for SRS resources in one SRS resource set may be different in STRP transmission mode and SDM transmission mode. The bit width of the second TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the second SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the second SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits with values ​​set to "0" may be inserted in the second TPMI field.

[0074] In some embodiments, the UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower," "fullpowerMode1," or "fullpowerMode2." The bit width of the first TPMI field can be determined by whether the UL full power mode is configured as "fullpowerMode1." The UL full power transmission mode can be configured with different values ​​for the STRP transmission mode and the SDM transmission mode. The STRP transmission mode and the SDM transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the UL full power transmission mode is configured as "fullpowerMode1" for only the STRP transmission mode or only the SDM transmission mode, some most significant bits with values ​​set to "0" can be inserted into the second TPMI field.

[0075] In some embodiments, the maximum coherence of an antenna port may depend on the UE capability report and be configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of an antenna port may be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the second TPMI field may be determined by the configured value of the antenna port coherence. The maximum coherence of an antenna port may be configured with different values ​​for the STRP transmission mode and the SDM transmission mode. The STRP transmission mode and the SDM transmission mode may be indicated by an SRS resource set indicator field in the DCI. If the maximum coherence of an antenna port of a transmission mode is higher than the maximum coherence of an antenna port of another transmission mode, some most significant bits with values ​​set to "0" may be inserted in the first TPMI field.

[0076] Example 1-2: Determination of first and second SRI fields in DCI for SDM-based simultaneous PUSCH transmission in MTRP operation under CB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0077] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use a different transmission layer. In some embodiments, a first PUSCH transmission may be associated with a first set of transmission layers. A second PUSCH transmission may be associated with a second set of transmission layers. In some embodiments, these PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. The PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. These PUSCH transmissions may be transmitted in the same or different RVs.

[0078] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship.

[0079] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0080] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0081] The UE may acquire / obtain one or more indications of SRI (SRS resource indicators) based on the received DCI information and apply them to these PUSCH transmissions. In some embodiments, the first indication of SRI may be given by a first SRI field in the DCI.

[0082] The first indication of the SRI can be used for the first PUSCH associated with the first SRS resource set in the STRP transmission mode and the SDM transmission mode. The bit width of the first SRI field can be determined according to the number of SRS resources configured in the first SRS resource set. The number of SRS resources configured in the first SRS resource set can be configured by the upper layer parameter srs-ResourceIdList in SRS-Config for the first PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the first SRI field can be determined according to the number of SRS resources configured in the first SRS resource set. [ka] can be made equal to N SRS is the number of SRS resources configured in the first SRS resource set. The number of SRS resources configured in the first SRS resource set may be different for the STRP transmission mode and the SDM transmission mode. If the number of SRS resources configured in the first SRS resource set is dedicated to each transmission mode and the number of configured SRS resources for a transmission mode is less than the number of SRS resources for another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first TPMI field.

[0083] In some embodiments, the second indication of SRI may be provided by a second SRI field in the DCI. The second indication of SRI may be used for a second PUSCH associated with the second SRS resource set under the STRP transmission mode and the SDM transmission mode. The bit width of the second SRI field may be determined according to the number of SRS resources configured in the second SRS resource set. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present. If the second SRS resource set is not configured, the second SRI field may not be present.

[0084] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] is equal to N SRS is the number of SRS resources configured in the second SRS resource set. The number of SRS resources configured in the second SRS resource set may differ under the STRP transmission mode and the SDM transmission mode. If the number of SRS resources configured in the second SRS resource set is dedicated to each transmission mode and the number of configured SRS resources of a transmission mode is less than the number of SRS resources of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first SRI field.

[0085] Example 1-3: Determination of first and second SRI fields in DCI for SDM-based simultaneous PUSCH transmission in MTRP operation under NCB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0086] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use a different transmission layer. A first PUSCH transmission may be associated with a first set of transmission layers. A second PUSCH transmission may be associated with a second set of transmission layers. In some embodiments, these PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. The PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. These PUSCH transmissions may be transmitted in the same or different RVs.

[0087] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship.

[0088] A UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "noncodebook". Each PUSCH transmission may be associated with one SRS resource set.

[0089] For a non-codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0090] Based on the received DCI information, the UE may acquire / obtain one or more indications of SRI (SRS resource indicators) and apply them to these PUSCH transmissions. The first indication of SRI may be provided by a first SRI field in the DCI. The first indication of SRI may be used for the first PUSCH associated with the first SRS resource set under the STRP transmission mode and the SDM transmission mode. The bit width of the first SRI field may be determined according to at least one of the number of SRS resources configured in the first SRS resource set or the maximum number of transmission layers for the first PUSCH. The number of SRS resources configured in the first SRS resource set may be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the first PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2.

[0091] The bit width of the first SRI field is [ka] can be equal to N SRSwhere L is the number of SRS resources configured in the first SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH. The number of SRS resources configured in the first SRS resource set may be different for the STRP transmission mode and the SDM transmission mode. If the number of SRS resources configured in the first SRS resource set is dedicated to each transmission mode and the number of configured SRS resources for a transmission mode is less than the number of SRS resources for another transmission mode, some most significant bits with a value set to '0' may be inserted in the first SRI field. The maximum number of transmission layers for the first PUSCH may be configured by the upper layer parameter maxMIMO-Layers in PUSCH-ServingCellConfig, or depends on the maximum number of layers for the PUSCH supported by the UE for non-codebook-based operation. The maximum number of transmission layers for the first PUSCH may be dedicated to the STRP transmission mode and the SDM transmission mode. If the maximum number of transmission layers for a transmission is lower than the maximum number of transmission layers of another transmission mode, some most significant bits with values ​​set to "0" may be inserted in the first SRI field.

[0092] The second indication of SRI may be provided by a second SRI field in the DCI. The second indication of SRI may be used for a second PUSCH associated with the second SRS resource set under the STRP transmission mode and the SDM transmission mode. The bit width of the second SRI field may be determined according to at least one of the number of SRS resources configured in the second SRS resource set or the maximum number of transmission layers for the second PUSCH. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present. If the second SRS resource set is not configured, the second SRI field may not be present.

[0093] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] can be equal to N SRS where L is the number of SRS resources configured in the first SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH. The number of SRS resources configured in the second SRS resource set may differ under the STRP transmission mode and the SDM transmission mode. If the number of SRS resources configured in the second SRS resource set is dedicated to each transmission mode, and the number of configured SRS resources of a transmission mode is less than the number of SRS resources of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first SRI field.

[0094] The maximum number of transmission layers for the second PUSCH may be configurable by the higher layer parameter maxMIMO-Layers in PUSCH-ServingCellConfig or may depend on the maximum number of layers for PUSCH supported by the UE for non-codebook-based operation. The maximum number of transmission layers for the second PUSCH may be dedicated to the STRP transmission mode or the SDM transmission mode. If the maximum number of transmission layers for a transmission is lower than the maximum number of transmission layers of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first SRI field.

[0095] Example 1-4: Determination of first and second TPMI fields in DCI for SDM-based simultaneous PUSCH transmission in MTRP operation under CB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0096] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use a different transmission layer. The first PUSCH transmission may be associated with a first set of transmission layers. The second PUSCH transmission may be associated with a second set of transmission layers. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. The PUSCH transmissions may be at least one of inter-slot-based or intra-slot-based PUSCH transmissions. These PUSCH transmissions may be transmitted in the same or different RVs.

[0097] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship.

[0098] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0099] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0100] The UE may acquire / obtain one or more indications of a precoder and a transmission layer based on the received DCI information and apply them to these PUSCH transmissions. The first indication of the precoder and the transmission layer may be provided by a first TPMI field of the DCI. In the STRP transmission mode, the first indication of the precoder and the transmission layer may be used for the first or second PUSCH associated with the first or second SRS resource set, respectively. In the SDM scheme, the first indication of the precoder and the transmission layer may be used for the first PUSCH associated with only the first SRS resource set.

[0101] The bit width of the first TPMI field may be determined according to at least one of the maximum transmission rank for the first PUSCH, the number of antenna ports for the second PUSCH, the mode of UL full power transmission for the first PUSCH, or the maximum coherence of the antenna ports for the first PUSCH.

[0102] The maximum transmission rank may be configured by the higher layer parameter maxRank in pusch-Config for the first PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the first PUSCH scheduled with DCI format 0_2.

[0103] For the STRP transmission mode, the maximum transmission rank value can be configured to 1, 2, 3, or 4. For the SDM transmission mode, the maximum transmission rank value can be configured to 1 or 2.

[0104] The bit width of the first TPMI field may be determined by the maximum value configured for the maximum transmission rank. The value of the maximum transmission rank may differ under the STRP transmission mode and the SDM transmission mode. If necessary, under the STRP transmission mode, the value of the maximum transmission rank may differ between the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the maximum transmission rank of the first PUSCH is dedicated to the STRP transmission mode and the SDM transmission mode, or if the maximum transmission rank of a transmission mode is lower than the maximum transmission rank of another transmission mode, some most significant bits having a value set to '0' may be inserted into the first TPMI field. If the maximum transmission rank of the first PUSCH is shared by both the STRP transmission mode and the SDM transmission mode and the maximum transmission rank of an SRS resource set is lower than the maximum transmission rank of another SRS resource set, some most significant bits having a value set to '0' may be inserted into the first TPMI field. If the maximum transmission rank of the first PUSCH is the same for different transmission modes, the value of the maximum transmission rank may be subject to UE capability reporting for the STRP transmission mode and the SDM transmission mode.

[0105] The number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The number of antenna ports for SRS resources in one SRS resource set may be different in STRP transmission mode or SDM transmission mode. The number of antenna ports for SRS resources for the first SRS resource set or the second SRS resource set may be different. The bit width of the first TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the first SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the first SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits set to "0" may be inserted in the first TPMI field.

[0106] The UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower", "fullpowerMode1", or "fullpowerMode2". The bit width of the first TPMI field can be determined by whether the UL full power mode is configured as "fullpowerMode1". The UL full power transmission mode can be configured with different values ​​for the STRP transmission mode and the SDM transmission mode. The STRP transmission mode and the SDM transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the UL full power transmission mode is configured as "fullpowerMode1" for only the STRP transmission mode or only the SDM transmission mode, some most significant bits with values ​​set to "0" can be inserted in the first TPMI field.

[0107] The maximum coherence of an antenna port may depend on the UE capability report and is configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of an antenna port can be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the first TPMI field can be determined by the configured value of the antenna port coherence. The maximum coherence of an antenna port can be configured with different values ​​for the STRP transmission mode and the SDM transmission mode. The STRP transmission mode and the SDM transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the maximum coherence of an antenna port for a transmission mode is higher than the maximum coherence of an antenna port for another transmission mode, some most significant bits with a value set to "0" can be inserted into the first TPMI field.

[0108] The second indication of the precoder and transmission layer may be provided by a second TPMI field of the DCI. The second indication of the precoder and transmission layer may be used for a second PUSCH associated with a second SRS resource set when only in an SDM transmission mode. The bit width of the second TPMI field may be determined according to at least one of the maximum transmission rank for the second PUSCH, the number of antenna ports for the second PUSCH, the UL full power transmission mode for the second PUSCH, or the maximum coherence of antenna ports for the second PUSCH. The presence of the second TPMI field depends on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second TPMI field may not be present. If the second SRS resource set is not configured, the second TPMI field may not be present.

[0109] The maximum transmission rank may be configured by the upper layer parameter maxRank in pusch-Config for the second PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the second PUSCH scheduled with DCI format 0_2. For the STRP transmission mode, the value of the maximum transmission rank may be configured to be 1, 2, 3, or 4. For the SDM transmission mode, the value of the maximum transmission rank may be configured to be 1 or 2. The bit width of the second TPMI field may be determined by the maximum value configured for the maximum transmission rank.

[0110] The number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The bit width of the second TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the second SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the second SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits with values ​​set to "0" may be inserted in the second TPMI field.

[0111] The UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower", "fullpowerMode1", or "fullpowerMode2". The bit width of the first TPMI field can be determined by whether the UL full power mode is configured as "fullpowerMode1".

[0112] The maximum coherence of the antenna port may depend on the UE capability report and is configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of the antenna port can be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the second TPMI field can be determined by the configured value of the antenna port coherence.

[0113] Example 1-5: Determination of first and second SRI fields in DCI for SDM-based simultaneous PUSCH transmission in MTRP operation when using CB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0114] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use a different transmission layer. A first PUSCH transmission may be associated with a first set of transmission layers. A second PUSCH transmission may be associated with a second set of transmission layers. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. The PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. These PUSCH transmissions may be transmitted in the same or different RVs. If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship.

[0115] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0116] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0117] The UE may acquire / obtain one or more indications of SRI (SRS resource indicators) based on the received DCI information and apply them to these PUSCH transmissions. The first indication of SRI may be provided by a first SRI field in the DCI. In the STRP transmission mode, the first indication of SRI is used for the first or second PUSCH associated with the first or second SRS resource set, respectively. In the SDM transmission mode, the first indication of SRI is used for the first PUSCH associated with only the first SRS resource set.

[0118] The bit width of the first SRI field may be determined according to the number of SRS resources configured in the SRS resource set. The number of SRS resources configured in the SRS resource set is configured by the upper layer parameter srs-ResourceIdList in SRS-Config for the PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the first SRI field is [ka] is equal to N SRSwhere TPMI_number is the number of SRS resources configured in the SRS resource set. The number of SRS resources configured in the first SRS resource set may differ between the STRP transmission mode and the SDM transmission mode. If necessary, under the STRP transmission mode, the number of SRS resources configured in the SRS resource set may differ for the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the number of SRS resources configured in the first SRS resource set is dedicated to the STRP transmission mode and the SDM transmission mode, or if the number of SRS resources configured in the SRS resource set is less than the number of SRS resources of another transmission mode, some most significant bits having values ​​set to '0' may be inserted in the first TPMI field. If the number of SRS resources configured in the first SRS resource set is shared for both the STRP transmission mode and the SDM transmission mode, and the number of SRS resources configured in the SRS resource set is less than the number of SRS resources in another SRS resource set, some most significant bits with values ​​set to '0' may be inserted in the first TPMI field. If the number of SRS resources configured in the first SRS resource set is the same for different transmission modes, the number of SRS resources configured in the SRS resource set may be subject to UE capability reporting for the STRP transmission mode and the SDM transmission mode.

[0119] The second indication of SRI may be provided by a second SRI field in the DCI. The second indication of SRI may be used for a second PUSCH associated with the second SRS resource set when in SDM transmission mode only. The bit width of the second SRI field may be determined according to the number of SRS resources configured in the second SRS resource set. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present. If the second SRS resource set is not configured, the second SRI field may not be present.

[0120] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] is equal to N SRS is the number of SRS resources configured in the second SRS resource set.

[0121] Example 1-6: Determination of first and second SRI fields in DCI for SDM-based simultaneous PUSCH transmission in MTRP operation when using NCB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0122] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use a different transmission layer. A first PUSCH transmission may be associated with a first set of transmission layers. A second PUSCH transmission may be associated with a second set of transmission layers. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0123] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship.

[0124] A UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "noncodebook". Each PUSCH transmission may be associated with one SRS resource set.

[0125] For a non-codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0126] Based on the received DCI information, the UE may acquire / obtain one or more indications of SRI (SRS resource indicators) and apply them to these PUSCH transmissions. The first indication of SRI may be given by a first SRI field in the DCI. In the STRP transmission mode, the first indication of SRI may be used for the first or second PUSCH associated with the first or second SRS resource set, respectively. In the SDM transmission mode, the first indication of SRI may be used for the first PUSCH associated with only the first SRS resource set.

[0127] The bit width of the first SRI field may be determined according to at least one of the number of SRS resources configured in the first SRS resource set or the maximum number of transmission layers for the first PUSCH. The number of SRS resources configured in the first SRS resource set may be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. ... [ka] is equal to N SRSwhere L is the number of SRS resources configured in the SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH. The number of SRS resources configured in the first SRS resource set may be different between the STRP transmission mode and the SDM transmission mode. If necessary, under the STRP transmission mode, the number of SRS resources configured in the SRS resource set may be different for the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the number of SRS resources configured in the first SRS resource set is dedicated to the STRP transmission mode and the SDM transmission mode and the number of SRS resources configured in the SRS resource set is less than the number of SRS resources in another transmission mode, some most significant bits having values ​​set to '0' may be inserted in the first TPMI field.

[0128] If the number of SRS resources configured in the first SRS resource set is shared for both the STRP transmission mode and the SDM transmission mode, and the number of SRS resources configured in the SRS resource set is less than the number of SRS resources in another SRS resource set, some most significant bits with values ​​set to “0” may be inserted in the first TPMI field.

[0129] If the number of SRS resources configured in the first SRS resource set is the same for different transmission modes, the number of SRS resources configured in the SRS resource set may be subject to UE capability reporting for the STRP transmission mode and the SDM transmission mode.

[0130] The maximum number of transmission layers for the first PUSCH may be configurable by the higher layer parameter maxMIMO-Layers in PUSCH-ServingCellConfig or may depend on the maximum number of layers for PUSCH supported by the UE for non-codebook-based operation. The maximum number of transmission layers for PUSCH may be different for STRP transmission mode and SDM transmission mode. If necessary, under STRP transmission mode, the maximum number of transmission layers for PUSCH may be different for the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the maximum number of transmission layers for the first PUSCH is dedicated to STRP transmission mode and SDM transmission mode, or if the maximum number of transmission layers for PUSCH is lower than the maximum number of transmission layers for another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first TPMI field.

[0131] If the maximum number of transmission layers of the first PUSCH is shared by both the STRP transmission mode and the SDM transmission mode, and the maximum number of transmission layers of a PUSCH is lower than the maximum number of transmission layers of another PUSCH, some most significant bits with values ​​set to "0" may be inserted into the first TPMI field.

[0132] If the maximum number of transmission layers of the first PUSCH is the same for different transmission modes, the maximum number of transmission layers of the PUSCH may be subject to UE capability reporting for the STRP transmission mode and the SDM transmission mode.

[0133] The second indication of SRI may be provided by a second SRI field in the DCI. The second indication of SRI may be used for a second PUSCH associated with the second SRS resource set when in SDM transmission mode only. The bit width of the second SRI field may be determined according to the number of SRS resources configured in the second SRS resource set. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present. If the second SRS resource set is not configured, the second SRI field may not be present.

[0134] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] is equal to N SRS is the number of SRS resources configured in the SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH.

[0135] Example 1-7: Determination of first and second TPC fields in DCI for SDM-based simultaneous PUSCH transmission in MTRP operation under CB or NCB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0136] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use a different transmission layer. A first PUSCH transmission may be associated with a first set of transmission layers. A second PUSCH transmission may be associated with a second set of transmission layers. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0137] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship.

[0138] A UE can be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter Use in SRS-ResourceSet set to "codebook" or "nonCodebook". Each PUSCH transmission can be associated with one SRS resource set.

[0139] For codebook or non-codebook based transmission schemes, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0140] The UE may acquire / obtain one or more values ​​of TPC (Transmit Power Control) commands based on the received DCI information and apply them to these PUSCH transmissions. The first TPC value may be given by a first TPC command field in the DCI. The first TPC value may be used for the first PUSCH associated with a "closedLoopIndex" value=0 under STRP transmission mode or SDM transmission mode.

[0141] The second TPC value may be provided by a second TPC command field in the DCI. The second TPC value may be used for the second PUSCH associated with a "closedLoopIndex" value = 1 when in STRP or SDM transmission mode. The presence of the second TPC field depends on the higher layer parameter secondTPCFieldDCI-0-1-r17 or secondTPCFieldDCI-0-2-r17 in PUSCH-Config. The presence of the second TPC field may be exclusive to STRP or SDM transmission mode.

[0142] Example 2-1: Determination of first and second TPMI fields in DCI for SFN-based simultaneous PUSCH transmission in MTRP operation under CB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0143] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship. A first PUSCH transmission may be associated with a first beam state or spatial relationship. A second PUSCH transmission may be associated with a second beam state or spatial relationship. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0144] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use the same transmission layer or DMRS port.

[0145] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0146] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0147] The UE may acquire / obtain one or more indications of a precoder and a transmission layer based on the received DCI information and apply them to these PUSCH transmissions. The first indication of the precoder and the transmission layer may be provided by a first TPMI field of the DCI. The first indication of the precoder and the transmission layer may be used for the first PUSCH associated with the first SRS resource set under the STRP transmission mode and the SFN transmission mode. The bit width of the first TPMI field may be determined according to at least one of the maximum transmission rank for the first PUSCH, the number of antenna ports for the second PUSCH, the mode of UL full power transmission for the first PUSCH, or the maximum coherence of the antenna ports for the first PUSCH. The maximum transmission rank may be configured by the upper layer parameter maxRank in pusch-Config for the first PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the first PUSCH scheduled with DCI format 0_2. For the STRP transmission mode, the value of the maximum transmission rank may be configured to be 1, 2, 3, or 4. For the SFN transmission mode, the value of the maximum transmission rank may be configured to be 1 or 2. The bit width of the first TPMI field may be determined by the maximum value configured for the maximum transmission rank. The value of the maximum transmission rank may be different for the STRP transmission mode and the SFN transmission mode. The values ​​of the maximum transmission rank of the SRS resource(s) in the SRS resource set may be different. Each or a set of SRS resources in the SRS resource set may be dedicated to the STRP transmission mode or the SFN transmission mode. If the maximum transmission rank is dedicated to each transmission mode and the maximum transmission rank of a transmission mode is lower than the maximum transmission rank of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first TPMI field. If the maximum transmission rank is the same for different transmission modes, the value of the maximum transmission rank may be subject to UE capability reporting for the STRP transmission mode and the SFN transmission mode.

[0148] The number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The number of antenna ports for SRS resources in one SRS resource set may differ between the STRP transmission mode and the SFN transmission mode. The bit width of the first TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the first SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the first SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits set to "0" may be inserted in the first TPMI field.

[0149] The UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower", "fullpowerMode1", or "fullpowerMode2". The bit width of the first TPMI field can be determined depending on whether the UL full power mode is configured as "fullpowerMode1". The UL full power transmission mode can be configured with different values ​​for the STRP transmission mode and the SFN transmission mode. The STRP transmission mode and the SFN transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the UL full power transmission mode is configured as "fullpowerMode1" under only the STRP transmission mode or only the SFN transmission mode, some most significant bits with values ​​set to "0" can be inserted in the first TPMI field.

[0150] The maximum coherence of an antenna port may depend on the UE capability report and is configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of an antenna port can be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the first TPMI field can be determined by the configured value of the antenna port coherence. The maximum coherence of an antenna port can be configured with different values ​​under the STRP transmission mode and the SFN transmission mode. The STRP transmission mode and the SFN transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the maximum coherence of an antenna port for a transmission mode is higher than the maximum coherence of an antenna port for another transmission mode, some most significant bits with a value set to "0" can be inserted into the first TPMI field.

[0151] The second indication of the precoder and transmission layer may be provided by a second TPMI field of the DCI. The second indication of the precoder and transmission layer may be used for a second PUSCH associated with the second SRS resource set in the STRP transmission mode and the SFN transmission mode. The bit width of the second TPMI field may be determined according to at least one of a maximum transmission rank for the second PUSCH, the number of antenna ports for the second PUSCH, a mode of UL full power transmission for the second PUSCH, or a maximum coherence of antenna ports for the second PUSCH.

[0152] The presence of the second TPMI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second TPMI field may not be present.

[0153] If a second SRS resource set is not configured, the second TPMI field may not be present.

[0154] The maximum transmission rank may be configured by the upper layer parameter maxRank in pusch-Config for the second PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the second PUSCH scheduled with DCI format 0_2. For the STRP transmission mode, the value of the maximum transmission rank may be configured to 1, 2, 3, or 4. For the SFN transmission mode, the value of the maximum transmission rank may be configured to 1 or 2. The bit width of the second TPMI field may be determined by the maximum value configured for the maximum transmission rank. The value of the maximum transmission rank may differ between the STRP transmission mode and the SFN transmission mode. The values ​​of the maximum transmission rank of the SRS resource(s) in the SRS resource set may differ. The maximum transmission rank is dedicated to each transmission mode, and if the maximum transmission rank of a transmission mode is lower than the maximum transmission rank of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first TPMI field. The transmission mode may be at least one of the STRP transmission mode or the SFN transmission mode. If the maximum transmission rank is the same for different transmission modes, the value of the maximum transmission rank may be subject to UE capability reporting for the STRP transmission mode and the SFN transmission mode.

[0155] The number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The number of antenna ports for SRS resources in one SRS resource set may differ for the STRP transmission mode and the SFN transmission mode. The bit width of the second TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the second SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the second SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits with values ​​set to "0" may be inserted in the second TPMI field.

[0156] The UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower", "fullpowerMode1", or "fullpowerMode2". The bit width of the first TPMI field can be determined by whether the UL full power mode is configured as "fullpowerMode1". The UL full power transmission mode can be configured with different values ​​for the STRP transmission mode and the SFN transmission mode. The STRP transmission mode and the SFN transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the UL full power transmission mode is configured as "fullpowerMode1" for only the STRP transmission mode or only the SFN transmission mode, some most significant bits with values ​​set to "0" can be inserted into the second TPMI field.

[0157] The maximum coherence of an antenna port may depend on the UE capability report and is configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of an antenna port can be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the second TPMI field can be determined by the configured value of the antenna port coherence. The maximum coherence of an antenna port can be configured with different values ​​for the STRP transmission mode and the SFN transmission mode. The STRP transmission mode and the SFN transmission mode can be indicated by the SRS Resource Set Indicator field in the DCI. If the maximum coherence of an antenna port for a transmission mode is higher than the maximum coherence of an antenna port for another transmission mode, some most significant bits with a value set to "0" can be inserted into the first TPMI field.

[0158] Example 2-2: Determination of First and Second SRI Fields in DCI for SFN-Based Simultaneous PUSCH Transmission in MTRP Operation under CB Scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0159] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship. A first PUSCH transmission may be associated with a first beam state or spatial relationship. A second PUSCH transmission may be associated with a second beam state or spatial relationship. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0160] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use the same transmission layer or DMRS port.

[0161] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0162] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0163] The UE may acquire / obtain one or more indications of SRI (SRS resource indicators) based on the received DCI information and apply them to these PUSCH transmissions. The first indication of SRI may be provided by a first SRI field in the DCI. The first indication of SRI may be used for a first PUSCH associated with a first SRS resource set under the STRP transmission mode and the SFN transmission mode. The bit width of the first SRI field may be determined according to the number of SRS resources configured in the first SRS resource set. The number of SRS resources configured in the first SRS resource set may be configured by an upper layer parameter srs-ResourceIdList in SRS-Config for a first PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the first SRI field may be determined according to the number of SRS resources configured in the first SRS resource set. The number of SRS resources configured in the first SRS resource set may be configured by an upper layer parameter srs-ResourceIdList in SRS-Config for a first PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. [ka] is equal to N SRS is the number of SRS resources configured in the first SRS resource set. The number of SRS resources configured in the first SRS resource set may be different under the STRP transmission mode and the SFN transmission mode. If the number of SRS resources configured in the first SRS resource set is dedicated to each transmission mode and the number of configured SRS resources of a transmission mode is less than the number of SRS resources of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first TPMI field.

[0164] The second indication of the SRI may be provided by a second SRI field in the DCI. The second indication of the SRI may be used for a second PUSCH associated with the second SRS resource set in the STRP transmission mode and the SFN transmission mode. The bit width of the second SRI field may be determined according to the number of SRS resources configured in the second SRS resource set. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present.

[0165] If a second SRS resource set is not configured, the second SRI field may not be present.

[0166] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] is equal to N SRS is the number of SRS resources configured in the second SRS resource set.

[0167] The number of SRS resources configured in the second SRS resource set may be different for the STRP transmission mode and the SFN transmission mode. If the number of SRS resources configured in the second SRS resource set is dedicated to each transmission mode and the number of configured SRS resources for a transmission mode is less than the number of SRS resources for another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first SRI field.

[0168] Example 2-3: Determination of first and second SRI fields in DCI for SFN-based simultaneous PUSCH transmission in MTRP operation under NCB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0169] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship. A first PUSCH transmission may be associated with a first beam state or spatial relationship. A second PUSCH transmission may be associated with a second beam state or spatial relationship. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted on the same or different RVs. If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use the same transmission layer or DMRS port.

[0170] A UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "noncodebook". Each PUSCH transmission may be associated with one SRS resource set.

[0171] For a non-codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0172] The UE may acquire / obtain one or more indications of SRI (SRS resource indicators) based on the received DCI information and apply them to these PUSCH transmissions. The first indication of SRI may be provided by a first SRI field in the DCI. The first indication of SRI may be used for the first PUSCH associated with the first SRS resource set under the STRP transmission mode and the SFN transmission mode. The bit width of the first SRI field may be determined according to at least one of the number of SRS resources configured in the first SRS resource set or the maximum number of transmission layers for the first PUSCH. The number of SRS resources configured in the first SRS resource set may be configured by an upper layer parameter srs-ResourceIdList in SRS-Config for the first PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the first SRI field may be determined according to at least one of the number of SRS resources configured in the first SRS resource set or the maximum number of transmission layers for the first PUSCH. The number of SRS resources configured in the first SRS resource set may be configured by an upper layer parameter srs-ResourceIdList in SRS-Config for the first PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. [ka] can be equal to N SRS is the number of SRS resources configured in the first SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH.

[0173] The number of SRS resources configured in the first SRS resource set may be different for the STRP transmission mode and the SFN transmission mode. If the number of SRS resources configured in the first SRS resource set is dedicated to each transmission mode and the number of configured SRS resources for a transmission mode is less than the number of SRS resources for another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first SRI field.

[0174] The maximum number of transmission layers for the first PUSCH may be configurable by the higher layer parameter maxMIMO-Layers in PUSCH-ServingCellConfig or may depend on the maximum number of layers for PUSCH supported by the UE for non-codebook-based operation. The maximum number of transmission layers for the first PUSCH may be dedicated to the STRP transmission mode or the SFN transmission mode. If the maximum number of transmission layers for a transmission is lower than the maximum number of transmission layers of another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first SRI field.

[0175] The second indication of the SRI may be provided by a second SRI field in the DCI. The second indication of the SRI may be used for a second PUSCH associated with the second SRS resource set in the STRP transmission mode and the SFN transmission mode. The bit width of the second SRI field may be determined according to at least one of the number of SRS resources configured in the second SRS resource set or the maximum number of transmission layers for the second PUSCH. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present. If the second SRS resource set is not configured, the second SRI field may not be present.

[0176] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] is equal to NSRS is the number of SRS resources configured in the first SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH.

[0177] The number of SRS resources configured in the second SRS resource set may be different for the STRP transmission mode and the SFN transmission mode. If the number of SRS resources configured in the second SRS resource set is dedicated to each transmission mode and the number of configured SRS resources for a transmission mode is less than the number of SRS resources for another transmission mode, some most significant bits with values ​​set to '0' may be inserted in the first SRI field.

[0178] The maximum number of transmission layers for the second PUSCH can be configured by the higher layer parameter maxMIMO-Layers in PUSCH-ServingCellConfig or depends on the maximum number of layers for PUSCH supported by the UE for non-codebook-based operation. The maximum number of transmission layers for the second PUSCH can be dedicated to the STRP transmission mode or the SFN transmission mode. If the maximum number of transmission layers for a transmission is lower than the maximum number of transmission layers of another transmission mode, some most significant bits with values ​​set to '0' can be inserted in the first SRI field.

[0179] Example 2-4: Determination of first and second TPMI fields in DCI for SFN-based simultaneous PUSCH transmission in MTRP operation under CB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0180] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship. A first PUSCH transmission may be associated with a first beam state or spatial relationship. A second PUSCH transmission may be associated with a second beam state or spatial relationship. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0181] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use the same transmission layer or DMRS port.

[0182] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0183] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0184] The UE may acquire / obtain one or more indications of a precoder and a transmission layer based on the received DCI information and apply them to these PUSCH transmissions. The first indication of the precoder and the transmission layer may be provided by a first TPMI field of the DCI. In the STRP transmission mode, the first indication of the precoder and the transmission layer may be used for the first or second PUSCH associated with the first or second SRS resource set, respectively. In the SFN scheme, the first indication of the precoder and the transmission layer may be used for the first PUSCH associated with only the first SRS resource set.

[0185] The bit width of the first TPMI field may be determined according to at least one of the maximum transmission rank for the first PUSCH, the number of antenna ports for the second PUSCH, the mode of UL full power transmission for the first PUSCH, or the maximum coherence of the antenna ports for the first PUSCH.

[0186] The maximum transmission rank may be configured by the higher layer parameter maxRank in pusch-Config for the first PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the first PUSCH scheduled with DCI format 0_2.

[0187] For the STRP transmission mode, the value of the maximum transmission rank can be configured to be 1, 2, 3, or 4. For the SFN transmission mode, the value of the maximum transmission rank can be configured to be 1 or 2. The bit width of the first TPMI field may be determined by the maximum value configured for the maximum transmission rank. The value of the maximum transmission rank may differ between the STRP transmission mode and the SFN transmission mode. Optionally, under the STRP transmission mode, the value of the maximum transmission rank may differ between the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the maximum transmission rank of the first PUSCH is dedicated to the STRP transmission mode and the SFN transmission mode, or if the maximum transmission rank of a transmission mode is lower than the maximum transmission rank of another transmission mode, some most significant bits having a value set to '0' may be inserted in the first TPMI field. If the maximum transmission rank of the first PUSCH is shared by both the STRP transmission mode and the SFN transmission mode, and the maximum transmission rank of an SRS resource set is lower than the maximum transmission rank of another SRS resource set, some most significant bits with a value set to '0' may be inserted into the first TPMI field. If the maximum transmission rank of the first PUSCH is the same for different transmission modes, the value of the maximum transmission rank may be subject to UE capability reporting for the STRP transmission mode and the SFN transmission mode.

[0188] The number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The number of antenna ports for SRS resources in one SRS resource set may be different in STRP transmission mode or SFN transmission mode. The number of antenna ports for SRS resources for the first SRS resource set or the second SRS resource set may be different. The bit width of the first TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the first SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the first SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits set to "0" may be inserted in the first TPMI field.

[0189] The UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower", "fullpowerMode1", or "fullpowerMode2". The bit width of the first TPMI field can be determined depending on whether the UL full power mode is configured as "fullpowerMode1". The UL full power transmission mode can be configured with different values ​​for the STRP transmission mode and the SFN transmission mode. The STRP transmission mode and the SFN transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the UL full power transmission mode is configured as "fullpowerMode1" under only the STRP transmission mode or only the SFN transmission mode, some most significant bits with values ​​set to "0" can be inserted in the first TPMI field.

[0190] The maximum coherence of an antenna port may depend on the UE capability report and is configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of an antenna port can be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the first TPMI field can be determined by the configured value of the antenna port coherence. The maximum coherence of an antenna port can be configured with different values ​​under the STRP transmission mode and the SFN transmission mode. The STRP transmission mode and the SFN transmission mode can be indicated by the SRS resource set indicator field in the DCI. If the maximum coherence of an antenna port for a transmission mode is higher than the maximum coherence of an antenna port for another transmission mode, some most significant bits with a value set to "0" can be inserted into the first TPMI field.

[0191] The second indication of the precoder and transmission layer may be provided by a second TPMI field of the DCI. The second indication of the precoder and transmission layer may be used for a second PUSCH associated with a second SRS resource set only under the SFN transmission mode. The bit width of the second TPMI field may be determined according to at least one of the maximum transmission rank for the second PUSCH, the number of antenna ports for the second PUSCH, the UL full power transmission mode for the second PUSCH, or the maximum coherence of the antenna ports for the second PUSCH. The presence of the second TPMI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second TPMI field may not be present. If the second SRS resource set is not configured, the second TPMI field may not be present.

[0192] The maximum transmission rank may be configured by the higher layer parameter maxRank in pusch-Config for the second PUSCH scheduled with DCI format 0_1 ​​and by maxRankDCI-0-2 for the second PUSCH scheduled with DCI format 0_2. The value of the maximum transmission rank may be configured to be 1, 2, 3, or 4. The bit width of the second TPMI field may be determined by the maximum value configured for the maximum transmission rank.

[0193] The number of antenna ports may be configured by the higher layer parameter nrofSRS-Port in SRS-Config. The number of antenna ports may be configured to 1, 2, or 4. The bit width of the second TPMI field may be determined by the maximum number of ports in SRS resources among the configured SRS resources in the second SRS resource set that have a usage set in the "codebook." If the number of antenna ports for the configured SRS resources in the second SRS resource set is less than the maximum number of antenna ports in SRS resources among all configured SRS resources, some most significant bits with values ​​set to "0" may be inserted in the second TPMI field.

[0194] The UL full power transmission mode can be configured by the upper layer parameter ul-FullPowerTransmission. The UL full power transmission mode can be configured as "fullpower", "fullpowerMode1", or "fullpowerMode2". The bit width of the first TPMI field can be determined by whether the UL full power mode is configured as "fullpowerMode1".

[0195] The maximum coherence of the antenna port may depend on the UE capability report and is configured by the higher layer parameters codebookSubset in the pusch-Config for the PUSCH associated with DCI format 0_1 ​​and codebookSubsetDCI-0-2 in the pusch-Config for the PUSCH associated with DCI format 0_2. The maximum coherence of the antenna port can be configured as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent". The bit width of the second TPMI field is determined by the configured value of the antenna port coherence.

[0196] Example 2-5: Determination of first and second SRI fields in DCI for SFN-based simultaneous PUSCH transmission in MTRP operation under CB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0197] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship. A first PUSCH transmission may be associated with a first beam state or spatial relationship. A second PUSCH transmission may be associated with a second beam state or spatial relationship. These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0198] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use the same transmission layer or DMRS port.

[0199] The UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "codebook". Each PUSCH transmission may be associated with one SRS resource set.

[0200] For the codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0201] The UE may acquire / obtain one or more indications of SRI (SRS resource indicators) based on the received DCI information and apply them to these PUSCH transmissions. The first indication of SRI may be provided by a first SRI field in the DCI. In the STRP transmission mode, the first indication of SRI may be used for the first or second PUSCH associated with the first or second SRS resource set, respectively. In the SFN transmission mode, the first indication of SRI may be used for the first PUSCH associated with only the first SRS resource set.

[0202] The bit width of the first SRI field may be determined according to the number of SRS resources configured in the SRS resource set. The number of SRS resources configured in the SRS resource set may be configured by the upper layer parameter srs-ResourceIdList in SRS-Config for a PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the first SRI field is [ka] can be equal to N SRS is the number of SRS resources configured in the SRS resource set.

[0203] The number of SRS resources configured in the first SRS resource set may differ between the STRP transmission mode and the SFN transmission mode. If necessary, under the STRP transmission mode, the number of SRS resources configured in the SRS resource set may differ for the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the number of SRS resources configured in the first SRS resource set is dedicated to the STRP transmission mode and the SFN transmission mode, or if the number of SRS resources configured in the SRS resource set is less than the number of SRS resources in another transmission mode, some most significant bits having a value set to '0' may be inserted in the first TPMI field. If the number of SRS resources configured in the first SRS resource set is shared between the STRP transmission mode and the SFN transmission mode and the number of SRS resources configured in the SRS resource set is less than the number of SRS resources in another SRS resource set, some most significant bits having a value set to '0' may be inserted in the first TPMI field. If the number of SRS resources configured in the first SRS resource set is the same for different transmission modes, the number of SRS resources configured in the SRS resource set may be subject to UE capability reporting for the STRP transmission mode and the SFN transmission mode.

[0204] The second indication of SRI may be provided by a second SRI field in the DCI. The second indication of SRI may be used for a second PUSCH associated with a second SRS resource set when in SFN transmission mode only. The bit width of the second SRI field may be determined according to the number of SRS resources configured in the second SRS resource set. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present. If the second SRS resource set is not configured, the second SRI field may not be present.

[0205] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] is equal to N SRS is the number of SRS resources configured in the second SRS resource set.

[0206] Example 2-6: Determination of first and second SRI fields in DCI for SFN-based simultaneous PUSCH transmission in MTRP operation under NCB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0207] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship. A first PUSCH transmission may be associated with a first beam state or spatial relationship. A second PUSCH transmission may be associated with a second beam state or spatial relationship.

[0208] These PUSCH transmissions may fully or partially overlap each other in the time and / or frequency domain. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0209] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use the same transmission layer or DMRS port.

[0210] A UE may be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter use in SRS-ResourceSet set to "noncodebook". Each PUSCH transmission may be associated with one SRS resource set.

[0211] For a non-codebook-based transmission scheme, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0212] The UE may acquire / obtain one or more indications of SRI (SRS resource indicators) based on the received DCI information and apply them to these PUSCH transmissions. The first indication of SRI may be provided by a first SRI field in the DCI. In the STRP transmission mode, the first indication of SRI may be used for the first or second PUSCH associated with the first or second SRS resource set, respectively. In the SFN transmission mode, the first indication of SRI may be used for the first PUSCH associated only with the first SRS resource set. The bit width of the first SRI field may be determined according to at least one of the number of SRS resources configured in the first SRS resource set or the maximum number of transmission layers for the first PUSCH.

[0213] The number of SRS resources configured in the first SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the first SRI field is [ka] can be equal to N SRS is the number of SRS resources configured in the SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH.

[0214] The number of SRS resources configured in the first SRS resource set may be different between the STRP transmission mode and the SFN transmission mode. If necessary, under the STRP transmission mode, the number of SRS resources configured in the SRS resource set may be different for the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the number of SRS resources configured in the first SRS resource set is dedicated to the STRP transmission mode and the SFN transmission mode and the number of SRS resources configured in the SRS resource set is less than the number of SRS resources in another transmission mode, some most significant bits having a value set to '0' may be inserted in the first TPMI field. If the number of SRS resources configured in the first SRS resource set is shared between the STRP transmission mode and the SFN transmission mode and the number of SRS resources configured in the SRS resource set is less than the number of SRS resources in another SRS resource set, some most significant bits having a value set to '0' may be inserted in the first TPMI field. If the number of SRS resources configured in the first SRS resource set is the same for different transmission modes, the number of SRS resources configured in the SRS resource set may be subject to UE capability reporting for the STRP transmission mode and the SFN transmission mode.

[0215] The maximum number of transmission layers for the first PUSCH may be configurable by the higher layer parameter maxMIMO-Layers in PUSCH-ServingCellConfig or may depend on the maximum number of layers for PUSCH supported by the UE for non-codebook-based operation. The maximum number of transmission layers for PUSCH may be different for STRP transmission mode and SFN transmission mode. If necessary, under STRP transmission mode, the maximum number of transmission layers for PUSCH may be different for the first PUSCH and the second PUSCH associated with the first SRS resource set and the second SRS resource set, respectively. If the maximum number of transmission layers for the first PUSCH is dedicated to STRP transmission mode and SFN transmission mode, or if the maximum number of transmission layers for PUSCH is lower than the maximum number of transmission layers for another transmission mode, some most significant bits with a value set to '0' may be inserted in the first TPMI field.

[0216] If the maximum number of transmission layers of the first PUSCH is shared by both the STRP transmission mode and the SFN transmission mode, and the maximum number of transmission layers of a PUSCH is lower than the maximum number of transmission layers of another PUSCH, some most significant bits with values ​​set to "0" may be inserted into the first TPMI field.

[0217] If the maximum number of transmission layers of the first PUSCH is the same for different transmission modes, the maximum number of transmission layers of the PUSCH may be subject to UE capability reporting for the STRP transmission mode and the SFN transmission mode.

[0218] The second indication of SRI may be provided by a second SRI field in the DCI. The second indication of SRI may be used for a second PUSCH associated with a second SRS resource set when in SFN transmission mode only. The bit width of the second SRI field may be determined according to the number of SRS resources configured in the second SRS resource set. The presence of the second SRI field may depend on the presence of an SRS resource set indicator field in the DCI or the configuration of the second SRS resource set. If the SRS resource set indicator field is not present in the DCI, the second SRI field may not be present. If the second SRS resource set is not configured, the second SRI field may not be present.

[0219] The number of SRS resources configured in the second SRS resource set can be configured by the higher layer parameter srs-ResourceIdList in SRS-Config for the second PUSCH scheduled in DCI format 0_1 ​​or DCI format 0_2. The bit width of the second SRI field is [ka] can be equal to N SRS is the number of SRS resources configured in the SRS resource set, and Lmax is the maximum number of transmission layers for the PUSCH.

[0220] Example 2-7: Determination of first and second TPC fields in DCI for SFN-based simultaneous PUSCH transmission in MTRP operation under CB or NCB scheme A UE may be scheduled to transmit at least one PUSCH transmission within one transmission opportunity.

[0221] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may be associated with one beam state or spatial relationship. A first PUSCH transmission may be associated with a first beam state or spatial relationship. A second PUSCH transmission may be associated with a second beam state or spatial relationship.

[0222] These PUSCH transmissions may overlap each other completely or partially in the time and / or frequency domains. Furthermore, the PUSCH transmissions may be at least one of inter-slot-based PUSCH transmissions or intra-slot-based PUSCH transmissions. Furthermore, these PUSCH transmissions may be transmitted in the same or different RVs.

[0223] If a UE is scheduled to transmit more than one PUSCH transmission, each of these PUSCH transmissions may use the same transmission layer or DMRS port.

[0224] A UE can be configured with two SRS resource sets, configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 with the higher layer parameter Use in SRS-ResourceSet set to "codebook" or "nonCodebook". Each PUSCH transmission can be associated with one SRS resource set.

[0225] For codebook or non-codebook based transmission schemes, PUSCH transmission can be scheduled by DCI format 0_1 ​​or DCI format 0_2.

[0226] The UE may acquire / obtain one or more values ​​of TPC (Transmit Power Control) commands based on the received DCI information and apply them to these PUSCH transmissions. The first TPC value may be given by a first TPC command field in the DCI. The first TPC value may be used for the first PUSCH associated with a "closedLoopIndex" value=0 under STRP transmission mode or SDM transmission mode.

[0227] The second TPC value may be provided by a second TPC command field in the DCI. The second TPC value may be used for a second PUSCH associated with a "closedLoopIndex" value=1 under STRP or SDM transmission mode. The presence of the second TPC field may depend on the higher layer parameter secondTPCFieldDCI-0-1-r17 or secondTPCFieldDCI-0-2-r17 in PUSCH-Config. The presence of the second TPC field may be exclusive to STRP or SDM transmission mode.

[0228] It should be understood that one or more features from the above implementation examples are not limited to a particular implementation example and may be combined in any manner (e.g., in any priority and / or order, simultaneously or otherwise).

[0229] 5 shows a flow diagram of a method 500 for determining downlink control information. Method 500 may be implemented using any one or more of the components and devices detailed herein in connection with FIGS. 1-4. In summary, method 500 may, in some embodiments, be performed by a wireless communication device (e.g., a UE). Depending on the embodiment, additional, fewer, or different operations may be performed in method 500. At least one aspect of these operations is directed to a system, method, apparatus, or computer-readable medium.

[0230] A wireless communication device may receive downlink signaling from a wireless communication node, the downlink signaling including a first indication field and a second indication field. The wireless communication device may simultaneously transmit a first Physical Uplink Shared Channel (PUSCH) transmission and a second PUSCH transmission. The first PUSCH transmission may be indicated by the first indication field. The second PUSCH transmission may be indicated by one of the first indication field or the second indication field.

[0231] In some embodiments, the first PUSCH transmission and the second PUSCH transmission may be associated with different transmission layers. The first PUSCH transmission and the second PUSCH transmission may fully or partially overlap each other in at least one of the frequency domain or the time domain. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective beam state or a respective spatial relationship. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective sounding reference signal (SRS) resource set.

[0232] In some embodiments, the first PUSCH transmission and the second PUSCH transmission may be associated with one or more identical transmission layers or demodulation reference signal (DMRS) ports. The first PUSCH transmission and the second PUSCH transmission may fully or partially overlap each other in at least one of the frequency domain or the time domain. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective beam state or a respective spatial relationship. Each of the first PUSCH transmission and the second PUSCH transmission may be associated with a respective sounding reference signal (SRS) resource set.

[0233] In some embodiments, each of the first PUSCH transmission and the second PUSCH transmission can be configured as a codebook-based PUSCH transmission. The first indication field can be a first transmit precoding matrix indication (TPMI) field indicating a precoder and transmission layer for the first PUSCH transmission. The second indication field can be a second TPMI field indicating a precoder and transmission layer for the second PUSCH transmission.

[0234] In some embodiments, the bit width of the first TPMI field may be determined based on at least one of the following: a maximum transmission rank of the first PUSCH transmission, a number of antenna ports for the first PUSCH transmission, a mode of uplink full power transmission for the first PUSCH transmission, or a maximum coherence of antenna ports for the first PUSCH transmission. The bit width of the second TPMI field may be determined based on at least one of the following: a maximum transmission rank of the second PUSCH transmission, a number of antenna ports for the second PUSCH transmission, a mode of uplink full power transmission for the second PUSCH transmission, or a maximum coherence of antenna ports for the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to “0” may be inserted into the first TPMI field or the second TPMI field.

[0235] In some embodiments, the first indication field may be a first SRS resource indicator (SRI) field indicating for the first PUSCH transmission. The second indication field may be a second SRI field indicating for the second PUSCH transmission. A bit width of the first SRI field may be determined based on the number of SRS resources configured for the first PUSCH transmission. A bit width of the second SRI field may be determined based on the number of SRS resources configured for the second PUSCH transmission.

[0236] In some embodiments, each of the first PUSCH transmission and the second PUSCH transmission may be configured as a non-codebook-based PUSCH transmission. The first indication field may be a first SRS resource indicator (SRI) field indicating for the first PUSCH transmission. The second indication field may be a second SRI field indicating for the second PUSCH transmission. A bit width of the first SRI field may be determined based on at least one of the number of SRS resources or the maximum number of transmission layers configured for the first PUSCH transmission. A bit width of the second SRI field may be determined based on at least one of the number of SRS resources or the maximum number of transmission layers configured for the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to '0' may be inserted into the first SRI field or the second SRI field.

[0237] In some embodiments, the first indication field may be a first transmit precoding matrix indication (TPMI) field indicating a precoder and transmission layer for the first PUSCH transmission or the second PUSCH transmission. The second indication field may be a second TPMI field indicating a precoder and transmission layer for the second PUSCH transmission. The bit width of the first TPMI field may be determined based on at least one of a maximum transmission rank of the first PUSCH transmission or the second PUSCH transmission, a number of antenna ports for the first PUSCH transmission or the second PUSCH transmission, a mode of uplink full power transmission for the first PUSCH transmission or the second PUSCH transmission, or a maximum coherence of antenna ports for the first PUSCH transmission or the second PUSCH transmission. The bit width of the second TPMI field may be determined based on at least one of the following: a maximum transmission rank of the second PUSCH transmission or the second PUSCH transmission, a number of antenna ports for the second PUSCH transmission or the second PUSCH transmission, a mode of uplink full power transmission for the second PUSCH transmission or the second PUSCH transmission, or a maximum coherence of antenna ports for the second PUSCH transmission or the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to “0” may be inserted into the first TPMI field or the second TPMI field.

[0238] In some embodiments, the first indication field may be a first SRS resource indicator (SRI) field configured for the first PUSCH transmission or the second PUSCH transmission. The second indication field may be a second SRI field configured for the second PUSCH transmission. A bit width of the first SRI field may be determined based on the number of SRS resources configured for the first PUSCH transmission or the second PUSCH transmission. A bit width of the second SRI field may be determined based on the number of SRS resources configured for the second PUSCH transmission.

[0239] In some embodiments, the first indication field may be a first SRS resource indicator (SRI) field indicating regarding the first PUSCH transmission or the second PUSCH transmission. The second indication field may be a second SRI field indicating regarding the second PUSCH transmission. A bit width of the first SRI field may be determined based on the number of SRS resources configured for the first PUSCH transmission or the second PUSCH transmission. A bit width of the second SRI field may be determined based on the number of SRS resources configured for the second PUSCH transmission. If at least one of the determining factors for the first PUSCH transmission is different from the determining factor for the second PUSCH transmission, some most significant bits having a value set to '0' may be inserted into the first SRI field or the second SRI field.

[0240] While various embodiments of the present solution have been described above, it should be understood that they are presented by way of example only, and not by way of limitation. Similarly, various diagrams may depict example architectures or configurations, which are provided to enable those skilled in the art to understand example features and functionality of the present solution. However, such skilled artisans will understand that the present solution is not limited to the illustrated example architectures or configurations, but can be implemented using various alternative architectures and configurations. Moreover, as will be understood by those skilled in the art, one or more features of one embodiment can also 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 example embodiments described above.

[0241] It is also understood that any reference herein to an element using a designation such as "first," "second," etc., does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first and a second element does not imply that only two elements can be used or that the first element must precede the second element in any way.

[0242] Additionally, those skilled in the art will understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, and symbols that may be referred to in the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0243] Those skilled in the art will further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods, and functions described in connection with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementations, analog implementations, or a combination of the two), firmware, various forms of programs or design code incorporating instructions (which may be conveniently referred to herein as “software” or “software modules”), or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware, and software, the various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these techniques, depends on the particular application and design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in various ways for each particular application, and such implementation decisions do not cause a departure from the scope of the present disclosure.

[0244] Furthermore, those skilled in the art will understand that the various example logic blocks, modules, devices, components, and circuits described herein can be implemented in or by an integrated circuit (IC), which can include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logic blocks, modules, and circuits can further include an antenna and / or transceiver for communicating with various components within a network or device. A general-purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration for performing the functions described herein.

[0245] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media, including any medium that can be enabled to transfer a computer program or code from one place to another. A storage medium can be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0246] As used herein, the term "module" refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, while for purposes of discussion, various modules are described as individual modules, those skilled in the art will appreciate that two or more modules may be combined to form a single module that performs associated functions according to embodiments of the present solution.

[0247] Additionally, memory or other storage, as well as communication components, may be used in embodiments of the solution. It will be appreciated that, for clarity, the above description describes embodiments of the solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements, or domains may be used without detracting from the solution. For example, functionality illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. References to specific functional units therefore do not refer to a strict logical or physical structure or organization, but merely to suitable means for providing the described functionality.

[0248] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the novel features and principles disclosed herein as set forth in the following claims.

Claims

1. 1. A wireless communication method, comprising: receiving, by a wireless communication device, downlink signaling from a wireless communication node, the downlink signaling including a first indication field and a second indication field; the wireless communication device simultaneously transmitting a first physical uplink shared channel (PUSCH) transmission and a second PUSCH transmission; Including, 10. The wireless communication method, wherein the first PUSCH transmission is indicated by the first indication field and the second PUSCH transmission is indicated by one of the first indication field or the second indication field.

2. 2. The wireless communication method of claim 1, wherein the first PUSCH transmission and the second PUSCH transmission are each associated with a different transmission layer, the first PUSCH transmission and the second PUSCH transmission may fully or partially overlap each other in at least one of a frequency domain or a time domain, and each of the first PUSCH transmission and the second PUSCH transmission is associated with a respective beam state or a respective spatial relationship, or each of the first PUSCH transmission and the second PUSCH transmission is associated with a respective sounding reference signal (SRS) resource set.

3. 2. The wireless communication method of claim 1, wherein the first PUSCH transmission and the second PUSCH transmission are associated with one or more identical transmission layers or demodulation reference signal (DMRS) ports, the first PUSCH transmission and the second PUSCH transmission may fully or partially overlap each other in at least one of a frequency domain or a time domain, each of the first PUSCH transmission and the second PUSCH transmission is associated with a respective beam state or a respective spatial relationship, and each of the first PUSCH transmission and the second PUSCH transmission is associated with a respective sounding reference signal (SRS) resource set.

4. 4. The wireless communication method of claim 2 or 3, wherein each of the first PUSCH transmission and the second PUSCH transmission is configured as a codebook-based PUSCH transmission.

5. 5. The wireless communication method of claim 4, wherein the first indication field is a first transmit precoding matrix indication (TPMI) field that indicates a precoder and a transmission layer for the first PUSCH transmission, and the second indication field is a second TPMI field that indicates a precoder and a transmission layer for the second PUSCH transmission.

6. 6. The wireless communication method of claim 5, wherein a bit width of the first TPMI field is determined based on at least one of a maximum transmission rank of the first PUSCH transmission, a number of antenna ports for the first PUSCH transmission, a mode of uplink full power transmission for the first PUSCH transmission, or a maximum coherence of antenna ports for the first PUSCH transmission, and a bit width of the second TPMI field is determined based on at least one of a maximum transmission rank of the second PUSCH transmission, a number of antenna ports for the second PUSCH transmission, a mode of uplink full power transmission for the second PUSCH transmission, or a maximum coherence of antenna ports for the second PUSCH transmission.

7. 7. The wireless communication method of claim 6, wherein if at least one of the determinants for the first PUSCH transmission is different from a determinant for the second PUSCH transmission, then a number of most significant bits having a value set to '0' are inserted into the first TPMI field or the second TPMI field.

8. 5. The wireless communication method of claim 4, wherein the first indication field is a first SRS resource indicator (SRI) field indicating regarding the first PUSCH transmission, and the second indication field is a second SRI field indicating regarding the second PUSCH transmission.

9. 9. The wireless communication method of claim 8, wherein a bit width of the first SRI field is determined based on a number of SRS resources configured for the first PUSCH transmission, and a bit width of the second SRI field is determined based on a number of SRS resources configured for the second PUSCH transmission.

10. 4. The wireless communication method of claim 2 or 3, wherein each of the first PUSCH transmission and the second PUSCH transmission is configured as a non-codebook-based PUSCH transmission.

11. 11. The wireless communication method of claim 10, wherein the first indication field is a first SRS resource indicator (SRI) field indicating for the first PUSCH transmission, and the second indication field is a second SRI field indicating for the second PUSCH transmission.

12. 12. The wireless communication method of claim 11, wherein a bit width of the first SRI field is determined based on at least one of a number of SRS resources or a maximum number of transmission layers configured for the first PUSCH transmission, and a bit width of the second SRI field is determined based on at least one of a number of SRS resources or a maximum number of transmission layers configured for the second PUSCH transmission.

13. 13. The wireless communication method of claim 9 or 12, wherein if at least one of the determinants for the first PUSCH transmission is different from a determinant for the second PUSCH transmission, a number of most significant bits having a value set to '0' are inserted into the first SRI field or the second SRI field.

14. 5. The wireless communication method of claim 4, wherein the first indication field is a first transmit precoding matrix indication (TPMI) field that indicates a precoder and a transmission layer for the first PUSCH transmission or the second PUSCH transmission, and the second indication field is a second TPMI field that indicates a precoder and a transmission layer for the second PUSCH transmission.

15. 15. The wireless communication method of claim 14, wherein a bit width of the first TPMI field is determined based on at least one of a maximum transmission rank for the first PUSCH transmission or the second PUSCH transmission, a number of antenna ports for the first PUSCH transmission or the second PUSCH transmission, a mode of uplink full power transmission for the first PUSCH transmission or the second PUSCH transmission, or a maximum coherence of antenna ports for the first PUSCH transmission or the second PUSCH transmission, and a bit width of the second TPMI field is determined based on at least one of a maximum transmission rank for the second PUSCH transmission or the second PUSCH transmission, a number of antenna ports for the second PUSCH transmission or the second PUSCH transmission, a mode of uplink full power transmission for the second PUSCH transmission or the second PUSCH transmission, or a maximum coherence of antenna ports for the second PUSCH transmission or the second PUSCH transmission.

16. 16. The wireless communication method of claim 15, wherein if at least one of the determinants for the first PUSCH transmission is different from a determinant for the second PUSCH transmission, then a number of most significant bits having a value set to '0' are inserted into the first TPMI field or the second TPMI field.

17. 5. The wireless communication method of claim 4, wherein the first indication field is a first SRS resource indicator (SRI) field configuring for the first PUSCH transmission or the second PUSCH transmission, and the second indication field is a second SRI field configuring for the second PUSCH transmission.

18. 18. The wireless communication method of claim 17, wherein a bit width of the first SRI field is determined based on a number of SRS resources configured for the first PUSCH transmission or the second PUSCH transmission, and a bit width of the second SRI field is determined based on the number of SRS resources configured for the second PUSCH transmission.

19. 11. The wireless communication method of claim 10, wherein the first indication field is a first SRS resource indicator (SRI) field indicating for the first PUSCH transmission or the second PUSCH transmission, and the second indication field is a second SRI field indicating for the second PUSCH transmission.

20. 20. The wireless communication method of claim 19, wherein a bit width of the first SRI field is determined based on a number of SRS resources configured for the first PUSCH transmission or the second PUSCH transmission, and a bit width of the second SRI field is determined based on the number of SRS resources configured for the second PUSCH transmission.

21. 21. The wireless communication method of claim 18 or 20, wherein if at least one of the determinants for the first PUSCH transmission is different from a determinant for the second PUSCH transmission, a number of most significant bits having a value set to '0' are inserted into the first SRI field or the second SRI field.

22. 22. A wireless communications device comprising a processor and a memory, the processor configured to read code from the memory to perform a method according to any of claims 1 to 21.

23. 22. A computer program product, the computer program product comprising computer readable program medium code stored on the computer program product, the code, when executed by a processor, causing the processor to perform the method of any of claims 1 to 21.

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