Terminal device, network device and method

Abstract

The embodiments of the present disclosure relate to a method, an apparatus, and a computer-readable medium for communication. A terminal device in which a first set and a second set of antenna ports are configured receives a DCI for scheduling uplink transmission. The DCI includes a first SRI and a second SRI. The terminal device determines a first set of antenna port indexes based on a first number of layers of uplink transmission indicated by the first SRI and an index of an SRS resource in the first set of SRS resources, and determines a second set of antenna port indexes based on an index of an SRS resource in the second set of SRS resources, a second number of layers of uplink transmission indicated by the second SRI, and a number of SRS resources in the first set of SRS resources. Then, the terminal device performs uplink transmission on antenna ports corresponding to the first and second sets of antenna port indexes. In this manner, simultaneous transmission between multiple panels is properly supported.

Description

[Technical Field]

[0001] FIELD Exemplary embodiments of the present disclosure relate generally to the field of telecommunications, and more particularly to a communication method, apparatus, and computer-readable medium for simultaneous transmission between multiple panels (STxMP). [Background technology]

[0002] Non-codebook-based (NCB-based) Physical Uplink Shared Channel (PUSCH) transmission is an uplink transmission scheme that utilizes downlink (DL)-uplink (UL) channel reciprocity. In NCB-based PUSCH transmission, the network device can transmit a channel state information-reference signal (CSI-RS) to the terminal device or indicate a UL beam, and the terminal device can determine a UL precoder based on the CSI-RS measurement or the indicated UL beam without a predefined precoding matrix.

[0003] Currently, it has been proposed to place multiple panels on a terminal device. Conventionally, even if a terminal device is equipped with multiple panels, it can only transmit on one panel at a time. To improve transmission performance, support for STxMP technology is expected. While STxMP has been discussed, there are still several open issues that need to be addressed to better support NCB-based PUSCH STxMP. Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, exemplary embodiments of the present disclosure provide a communication method, apparatus, and computer storage medium for STxMP. [Means for solving the problem]

[0005] In a first aspect, a communication method is provided. The method includes receiving downlink control information (DCI) for scheduling uplink transmissions in a terminal device configured with a first set of antenna ports, determining a first set of antenna port indexes based on a first number of layers of the uplink transmission and indexes of Sounding Reference Signal (SRS) resources in the first set of SRS resources, determining a second set of antenna port indexes based on indexes of SRS resources in the second set of SRS resources, a second number of layers of the uplink transmission, and the number of SRS resources in the first set of SRS resources, and performing the uplink transmissions on antenna ports in the first set of antenna ports corresponding to the first and second set of antenna port indexes. The DCI includes a first SRS resource indicator and a second SRS resource indicator. The first number of layers is the number of layers transmitted on the first set of antenna ports and is indicated by the first SRS resource indicator. The second number of layers is the number of layers transmitted on the second set of antenna ports and is indicated by the second SRS resource indicator.

[0006] In a second aspect, a communication method is provided. The method includes receiving, in a terminal device configured with a first set of antenna ports, DCI for scheduling uplink transmissions, determining a set of antenna port indexes based on a number of layers of the uplink transmissions, indexes of SRS resources in the first set of SRS resources, and the number of SRS resources in the first set of SRS resources, and performing the uplink transmissions on the set of antenna ports in the first set of antenna ports corresponding to the set of antenna port indexes. The DCI includes an SRS resource indicator. The number of layers is the number of layers transmitted on each of the first set of antenna ports and the second set of antenna ports, and is indicated by the SRS resource indicator.

[0007] In a third aspect, a communication method is provided, the method including: determining, in a terminal device, a default capability value set associated with a bandwidth portion (BWP) configured for the terminal device; and performing at least one of: performing an initial transmission with a network device by applying the default capability value set; or performing an uplink transmission by applying the default capability value set according to a determination that a fallback condition is satisfied.

[0008] In a fourth aspect, a communication method is provided. The method includes: transmitting, in a network device, DCI for scheduling uplink transmission to a terminal device configured with a first set of antenna ports; determining a first set of antenna port indexes based on a first number of layers of the uplink transmission and indexes of SRS resources in the first set of SRS resources; determining a second set of antenna port indexes based on indexes of SRS resources in the second set of SRS resources, a second number of layers of the uplink transmission, and the number of SRS resources in the first set of SRS resources; and performing uplink transmission on antenna ports in the first set of antenna ports corresponding to the first and second set of antenna port indexes. The DCI includes a first SRS resource indicator and a second SRS resource indicator. The first number of layers is the number of layers transmitted on the first set of antenna ports and is indicated by the first SRS resource indicator. The second number of layers is the number of layers transmitted on the second set of antenna ports and is indicated by the second SRS resource indicator.

[0009] In a fifth aspect, a communication method is provided. The method includes: transmitting, in a network device, DCI for scheduling uplink transmission to a terminal device configured with a first set of antenna ports and a second set of antenna ports; determining a set of antenna port indexes based on a number of layers of the uplink transmission, indexes of SRS resources in the first set of SRS resources, and the number of SRS resources in the first set of SRS resources; and performing the uplink transmission on a set of antenna ports in the first set of antenna ports corresponding to the set of antenna port indexes. The DCI includes an SRS resource indicator. The number of layers is the number of layers transmitted on each of the first set of antenna ports and the second set of antenna ports, and is indicated by the SRS resource indicator.

[0010] In a sixth aspect, a communication method is provided, the method including: determining, in a network device, a default capability set for a terminal device associated with a BWP configured for the terminal device; and performing at least one of: performing an initial transmission with the terminal device by applying the default capability set; or performing an uplink transmission by applying the default capability set according to a determination that a fallback condition is satisfied.

[0011] In a seventh aspect, there is provided a terminal device, the terminal device including a processor configured to cause the terminal device to execute a method according to any one of the first to third aspects of the present disclosure.

[0012] In an eighth aspect, there is provided a network device, the network device including a processor configured to cause the network device to perform a method according to any one of the fourth to sixth aspects of the present disclosure.

[0013] In a ninth aspect, there is provided a computer-readable medium having stored thereon instructions that, when executed on at least one processor, cause the at least one processor to perform a method according to any of the first to sixth aspects of the present disclosure.

[0014] It should be understood that this Summary of the Invention is not intended to identify key features or essential features of the embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will be readily apparent through the following description. [Brief explanation of the drawings]

[0015] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description of several embodiments of the present disclosure in the accompanying drawings.

[0016] [Figure 1A] 1 illustrates an exemplary communication network in which embodiments of the present disclosure may be implemented.

[0017] [Figure 1B] 1 illustrates another exemplary communication network in which embodiments of the present disclosure may be implemented.

[0018] [Figure 1C] 1 illustrates yet another exemplary communication network in which embodiments of the present disclosure may be implemented.

[0019] [Figure 2A] 1 illustrates a signaling flow for scheduling NCB-based PUSCH transmissions in which embodiments of the present disclosure can be implemented.

[0020] [Figure 2B] An example of a coherent type is shown below.

[0021] [Figure 2C] An example of full power mode is shown below.

[0022] [Figure 3A] 1 illustrates an example of a transmission mode of STxMP in which an embodiment of the present disclosure can be implemented.

[0023] [Figure 3B] 1 illustrates an example of a transmission mode of STxMP in which an embodiment of the present disclosure can be implemented.

[0024] [Figure 3C] 1 illustrates an example of a transmission mode of STxMP in which an embodiment of the present disclosure can be implemented.

[0025] [Figure 4A] An example of an antenna structure compatible with hybrid beamforming type is shown below.

[0026] [Figure 4B] An example of an antenna structure compatible with hybrid beamforming type is shown below.

[0027] [Figure 4C] An example of an antenna structure compatible with hybrid beamforming type is shown below.

[0028] [Figure 4D] An example of an antenna structure compatible with hybrid beamforming type is shown below.

[0029] [Figure 5] 1 shows a schematic diagram illustrating a communication process, according to some exemplary embodiments of the present disclosure;

[0030] [Figure 6] 1 shows a schematic diagram illustrating another communication process, according to some exemplary embodiments of the present disclosure;

[0031] [Figure 7] 10 shows a schematic diagram illustrating yet another communication process, according to some exemplary embodiments of the present disclosure;

[0032] [Figure 8] 1 illustrates a flowchart of an exemplary method performed by a terminal device, according to some embodiments of the present disclosure.

[0033] [Figure 9] 1 illustrates a flowchart of an exemplary method performed by a terminal device, according to some embodiments of the present disclosure.

[0034] [Figure 10] 1 illustrates a flowchart of an exemplary method performed by a terminal device, according to some embodiments of the present disclosure.

[0035] [Figure 11] 1 illustrates a flowchart of an exemplary method performed by a network device, according to some embodiments of the present disclosure.

[0036] [Figure 12] 1 illustrates a flowchart of an exemplary method performed by a network device, according to some embodiments of the present disclosure.

[0037] [Figure 13] 1 illustrates a flowchart of an exemplary method performed by a network device, according to some embodiments of the present disclosure.

[0038] [Figure 14] FIG. 1 is a schematic block diagram of an apparatus suitable for practicing embodiments of the present disclosure.

[0039] Throughout the drawings, the same or similar reference numbers represent the same or similar elements. DETAILED DESCRIPTION OF THE INVENTION

[0040] The principles of the present disclosure will be described with reference to several embodiments. It should be understood that these embodiments are set forth for illustrative purposes only to aid those skilled in the art in understanding and practicing the present disclosure, and do not imply any limitation on the scope of the present disclosure. The present disclosure described herein can be implemented in a variety of ways other than those described below.

[0041] In the following description and claims, unless defined otherwise, all technical and scientific terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0042] As used herein, the term "terminal device" refers to any device with wireless or wired communication capabilities. Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, mobile phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, internet of things (IoT) devices, ultra-reliable low latency communications (URLLC) devices, internet of everything (IoE) devices, machine-type communications (MTC) devices, vehicle-mounted devices for V2X communications (where X represents pedestrian, vehicle, or infrastructure / network), devices for integrated access and backhaul (IAB), small data transmission (SDT), mobility, multicast broadcast services (MBS), positioning, dynamic / flexible duplexing in commercial networks, devices for reduced capability (RedCap), high altitude platforms (HAP) including unmanned aerial systems (UAS) and spacecraft or aircraft in non-terrestrial networks (NTN) including satellites, and extended reality (XR) including different types of reality such as augmented reality (AR), mixed reality (MR), and virtual reality (VR). "Terminal Devices" include, but are not limited to, Reality (VR) devices, unmanned aerial vehicles (UAVs) that do not require a human pilot, commonly known as drones, devices on high-speed trains (HST), imaging devices such as digital cameras, sensors, gaming devices, music storage and playback devices, or internet appliances that enable wireless or wired internet access and browsing. "Terminal Devices" may also have multicast / broadcast capabilities to support public safety and mission-critical applications, V2X applications, transparent IPv4 / IPv6 multicast distribution, IPTV, smart TV, wireless services, wireless software distribution, group communications, and IoT applications. They may also incorporate one or more subscriber identity modules (SIMs), known as multi-SIMs.The term "terminal equipment" can be used interchangeably with UE, mobile station, subscriber equipment, mobile terminal, user terminal, or wireless device.

[0043] The term "network device" refers to a device capable of providing or hosting a cell or coverage area over which terminal devices can communicate. Examples of network devices include, but are not limited to, a Node B (NodeB or NB), an Evolved Node B (eNodeB or eNB), a next generation Node B (gNB), a transmit / receive point (TRP), a remote radio unit (RRU), a radio head (RH), a remote radio head (RRH), an IAB node, a low-power node such as a femto node or a pico node, a reconfigurable intelligent surface (RIS), a network-controlled repeater (NCR), etc.

[0044] A terminal device or network device may have artificial intelligence (AI) or machine learning capabilities, which generally include models that can be used to learn from a large amount of data collected for a specific function and predict some information.

[0045] The terminal device or network device may operate in multiple frequency ranges, such as FR1 (410 MHz to 7125 MHz), FR2 (24.25 GHz to 71 GHz), frequency bands above 100 GHz, and terahertz (THz). Furthermore, it can operate in licensed, unlicensed, and shared spectrum. The terminal device may have multiple connections with the network device in a multi-radio dual connectivity (MR-DC) application scenario. The terminal device or network device can operate in full duplex, flexible duplex, and cross division duplex modes.

[0046] The network device may have the function of saving network energy, self-organizing network (SON) / minimizing drive test (MDT). The terminal may have the function of power saving.

[0047] Embodiments of the present disclosure may be implemented in test equipment, such as, for example, a signal generator, a signal analyzer, a spectrum analyzer, a network analyzer, a test terminal equipment, a test network equipment, a channel emulator, and the like.

[0048] Embodiments of the present disclosure may be performed in accordance with any currently known or future developed generation of communication protocols, including, but not limited to, first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or sixth generation (6G) networks.

[0049] In one embodiment, a terminal device may be connected to a first network device and a second network device. One of the first network device and the second network device may be a master node, and the other may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device, and the second network device may be a second RAT device. In one embodiment, the first RAT device is an eNB, and the second RAT device is a gNB. Information related to different RATs may be transmitted to the terminal device from at least one of the first network device and the second network device. In one embodiment, first information may be transmitted from the first network device to the terminal device, and second information may be transmitted from the second network device directly to the terminal device or via the first network device. In one embodiment, information related to a configuration of the terminal device set by the second network device may be transmitted from the second network device via the first network device. Information related to a reconfiguration of the terminal device set by the second network device may be transmitted from the second network device to the terminal device directly or via the first network device.

[0050] As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term "comprises" and variations thereof are intended to be open-ended, meaning "including, but not limited to." The term "based on" is intended to mean "based at least in part on." The terms "one embodiment" and "embodiment" are intended to mean "at least one embodiment." The term "another embodiment" is intended to mean "at least one other embodiment." Terms such as "first," "second," etc. may refer to different objects or the same object. The following content may include other definitions, both explicit and implicit.

[0051] In some instances, values, processes, or devices are referred to as "optimum," "lowest," "highest," "minimum," "maximum," etc. It is understood that such descriptions are intended to indicate choices among multiple functional alternatives used, and that such choices are not necessarily better, smaller, higher, or more preferred than other choices.

[0052] As mentioned above, there are still some open issues to be discussed to better support NCB-based PUSCH STxMP. For example, for NCB-based PUSCH STxMP, the configuration of SRS resources or SRS resource sets, reporting of UE capabilities, indication of SRS resource indicators (SRIs), etc. need to be further developed.

[0053] In consideration of this, embodiments of the present disclosure provide a communication solution for STxMP to overcome the above and other potential problems. In one aspect, two SRS resource sets are applied together for STxMP, and two SRS resource indicators are provided in a single DCI. In another aspect, one dedicated SRS resource set is applied for STxMP, and one SRS resource indicator is provided in a single DCI. In yet another aspect, a default panel associated with BWP is proposed. In this way, PUSCH STxMP can be better supported.

[0054] The principles and implementations of the present disclosure are described in detail below with reference to the drawings.

[0055] In this disclosure, some terms may refer to the same or similar physical meaning and may be used interchangeably. Some examples are given below: The terms “port used for uplink transmission”, “port used for PUSCH transmission”, “port with non-zero PUSCH transmit power” and “port with non-zero uplink transmit power” can be used interchangeably. The terms "panel used for uplink transmission", "panel used for PUSCH transmission", "panel with non-zero PUSCH transmit power" and "panel with non-zero uplink transmit power" can be used interchangeably. The terms "transmission capability information", "UE capability information", "capability related information", "capability value set", "panel information" and "panel related information" can be used interchangeably. The terms "precoder", "precoding", "precoding matrix", "beam", "spatial relationship information", "spatial relationship info", "precoding information", "precoding information and number of layers", "precoding matrix indicator (PMI)", "precoding matrix indicator", "transmit precoding matrix indication", "precoding matrix indication", "TCI state", "transmit configuration indicator", "quasi-co-location (QCL)", "quasi-co-location", "QCL parameters", "QCL assumptions", "QCL relations" and "spatial relations" may be used interchangeably. The terms "single TRP", "single TCI state", "single TCI", "S-TCI", "single CORESET", "single control resource set pool", "S-TRP" and "S-TCI state" can be used interchangeably. The terms "multiple TRPs", "multiple TCI states", "multiple CORESETs" and "multiple control resource set pools", "multiple TRPs", "multiple TCI states", "multiple TCIs", "multiple CORESETs" and "multiple control resource set pools", "MTRPs" and "M-TCIs", "M-TPRs" can be used interchangeably. The terms "resource", "resource within a resource set", and "resource set" can be used interchangeably. The terms "group," "subset," and "set" can be used interchangeably. Furthermore, a panel as discussed herein refers to one or more antenna elements arranged in a specific area of a terminal device. A panel as discussed herein may refer to a downlink panel, an uplink panel, a panel type, a panel state, a capability value set, a reference signal (RS) resource, an RS resource set, an antenna port, an antenna port group, a beam, or a beam group. In this regard, the terms "panel," "panel type," "set of antenna ports," "antenna element," and "antenna array" (and equivalent expressions) may be used interchangeably. Additionally, panel information discussed herein may refer to UE panel index / identification (ID), downlink panel ID, uplink panel ID, panel type indication, panel state indication, capability set index, RS resource ID, RS resource set ID, antenna port ID, antenna port group ID, beam ID, and beam group ID. As used herein, the term "TRP" refers to an antenna array (having one or more antenna elements) available to a network device in a particular geographic location. While some embodiments of the present disclosure are described with reference to, for example, a multiple TRP scenario (or a single TRP scenario), these embodiments are merely for illustrative purposes and are intended to assist those skilled in the art in understanding and practicing the present disclosure, and are not intended to imply any limitation on the scope of the present disclosure. It should be understood that the present disclosure described herein can be implemented in a variety of ways other than those described below. As used herein, the term "SRS transmission" refers to the transmission of an SRS resource identified by an SRS signal resource indicator (SRI) in a DCI message for an uplink grant. Accordingly, the term "latest SRS transmission" refers to the most recent transmission of an SRS resource identified by an SRI in a DCI message for an uplink grant. As used herein, the terms "network" / "network device" refer to one or more network devices. Thus, the terms "network," "network device," and "one or more network devices" can be used interchangeably. "Low capability panel" can be used interchangeably with "high capability panel", "panel corresponding to the index of the set of low / high capability values", "most recently used panel", "[old] panel used in first access / minimum PRACH", etc. In other words, this can be any predefined rule known by both the NW and UE, or the NW / UE can signal each other by configuration / capability report / request. · 'BWP ID / index' can be used interchangeably with 'BWP / CC ID / index', 'CC identity / index', 'Cell identity / index', 'Physical cell identity / index', and 'Serving cell identity / index'. Example of communication environment

[0056] 1A illustrates an exemplary communications network 100A in which embodiments of the present disclosure can be implemented. Communications network 100A includes network device 110-1 and, optionally, network device 110-2 (collectively or individually referred to as network device 110). Network device 110 can provide services to end device 120. For purposes of discussion, network device 110-1 will be referred to as first network device 110-1, and network device 110-2 will be referred to as second network device 110-2. Furthermore, first network device 110-1 and second network device 110-1 can communicate with each other.

[0057] In the communication network 100A, a link from a network device 110 (such as the first network device 110-1 or the second network device 110-2) to a terminal device 120 is called a downlink, while a link from the terminal device 120 to a network device 110 (such as the first network device 110-1 or the second network device 110-2) is called an uplink. In the downlink, the first network device 110-1 or the second network device 120-1 is a transmitting (Tx) device (or transmitter), and the terminal device 120 is a receiving (Rx) device (or receiver). In the uplink, the terminal device 120 is a transmitting (Tx) device (or transmitter), and the first network device 110-1 or the second network device 110-2 is an Rx device (or receiver).

[0058] In some embodiments, network device 110 and terminal device 120 may communicate over a direct link / channel.

[0059] Furthermore, multiple panels may be arranged on the terminal device 120. As shown in Fig. 1A, panels 125-1 and 125-2 are arranged on the terminal device 120. Hereinafter, the panels 125-1 and 125-2 may be referred to as the first panel 125-1 and the second panel 125-2, respectively.

[0060] In some embodiments, the first panel 125-1 and the second panel 125-2 correspond to different sets of antenna ports / antenna elements / antenna arrays. As a specific example, the first panel 125-1 corresponds to a first set of antenna ports, and the second panel 125-2 corresponds to a second set of antenna ports. In some embodiments, the panels 125-1 and 125-2 may each correspond to a different set of capability values.

[0061] The communication network 100A supports NCB-based PUSCH STxMP. Specifically, the terminal device 120 may execute NCB-based PUSCH simultaneously on both the panels 125-1 and 125-2.

[0062] Additionally, the illustrative example of Figure 1A also supports multi-TRP transmission. As shown in Figure 1A, terminal device 120 may communicate with two TRPs, namely, TRPs 130-1 and 130-2 (collectively or individually referred to as TRPs 130). For purposes of discussion, TRP 130-1 will be referred to as the first TRP 130-1 and TRP 130-2 will be referred to as the second TRP 130-2.

[0063] Furthermore, to support multiple TRPs and / or panels, the network device 110 may include one or more TRPs. For example, the network device 110 may be connected to multiple TRPs in different geographic locations to achieve better coverage. In one specific exemplary embodiment, the first network device 110-1 includes a first TRP 130-1 and a second TRP 130-2. Alternatively, in another specific exemplary embodiment, the first network device 110-1 and the second network device 110-2 include a first TRP 130-1 and a second TRP 130-2, respectively.

[0064] In some embodiments, the first TRP 130-1 and the second TRP 130-2 are associated with different control resource set pools (CORESET pools), e.g., the first TRP 130-1 is associated with the first control resource set pool, while the second TRP 130-2 is associated with the second control resource set pool.

[0065] 1A supports both single-TRP mode transmission and multi-TRP transmission. Specifically, in single-TRP mode, the terminal device 120 communicates with the network via the first TRP 130-1 / second TRP 130-2. Alternatively, in multi-TRP mode, the terminal device 120 communicates with the network via both the first TRP 130-1 and the second TRP 130-2.

[0066] As a specific exemplary embodiment, during an NCB-based PUSCH STxMP, the terminal device 120 communicates with a first TRP 130-1 via panel 125-1 and simultaneously communicates with a second TRP 130-2 via panel 125-2.

[0067] Furthermore, the network device 110 may provide one or more serving cells, and the first TRP 130-1 and the second TRP 130-2 may be included in the same serving cell or different serving cells. In other words, in the example of FIG. 1A, both inter-cell and intra-cell transmissions are supported.

[0068] Figure 1B illustrates an example scenario for the communication network 100A shown in Figure 1A. In the example of Figure 1B, a first TRP 130-1 and a second TRP 130-2 are included in the same serving cell 140. In this case, multi-TRP transmission is performed as an intra-cell transmission.

[0069] Figure 1C illustrates another exemplary scenario for the communication network 100A shown in Figure 1A. In the example of Figure 1C, the first TRP 130-1 and the second TRP 130-2 are included in different serving cells 140-1, 140-2. In this case, multi-TRP transmission is performed as an inter-cell transmission.

[0070] Communications of the communication network device 100A may conform to any suitable standard, including, but not limited to, Long Term Evolution (LTE), LTE Evolution (LTE-Evolution), LTE Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), and Global System for Mobile Communications (GSM). Furthermore, communications may be performed according to any currently known or future-developed generation of communication protocols. Examples of communication protocols include, but are not limited to, first-generation (1G), second-generation (2G), 2.5G, 2.75G, third-generation (3G), fourth-generation (4G), 4.5G, fifth-generation (5G), 5.5G, 5G-Advanced, or sixth-generation (6G) communication protocols.

[0071] It should be understood that the number, connectivity, and types of elements (i.e., terminal devices 120, panels 125, network devices 110, TRPs 130, and cells 140) shown in Figures 1A-1C are for illustrative purposes only and do not imply any limitations. Communications network 100A may include any suitable number of elements suitable for implementing embodiments of the present disclosure.

[0072] 2A illustrates a signaling flow 200A for scheduling NCB-based PUSCH transmissions in which embodiments of the present disclosure can be implemented. As shown in FIG. 2A, terminal device 120 may pass 210 UE capability information to network device 110.

[0073] An example of a UE capability is the coherence type supported by the terminal device 120, which may be one of full coherence, partial coherence, and noncoherence. In a specific exemplary embodiment, the coherence type may be reported using an information element (IE) pusch-TransCoherence. Figure 2B illustrates an example coherence type 200B. Furthermore, for a particular coherence type, only a subset of precoders may be used.

[0074] Another example of a UE capability is a full power mode supported by the terminal device, which may be one of full power mode 0 (fullpower or ul-FullPwrMode), full power mode 1 (ul-FullPwrMode1 or fullpowerMode1), and full power mode 2 (ul-FullPwrMode2 or fullpowerMode2). FIG. 2C shows an example full power mode 200C. Specifically, for full power mode 0, the terminal device can provide a maximum output power of 23 dBm because the transmit power is divided evenly among the non-zero PUSCH antennas. For full power mode 1, the terminal device 110 may transmit on the PUSCH using precoder {1,1} with a total maximum output power of 23 dBm, which means that the maximum output power cannot be provided with precoders {1,0} and {0,1}. In the case of full power mode 2, terminal device 110 may transmit on the PUSCH using precoder {1,1} with a total maximum output power of 23 dBm through the precoder reporting and antenna virtualization procedures.

[0075] Additionally, the full power mode may be reported in information elements (IEs) including, but not limited to, ul-FullPwrMode-r16, ul-FullPwrMode2-MaxSRS-ResInSet-r16, ul-FullPwrMode1-r16, etc. Furthermore, for a particular full power capability, only a subset of precoders may be used.

[0076] Other UE capabilities may be the maximum number of UL layers supported by terminal device 120 and the maximum number of SRS ports supported by terminal device 120.

[0077] 2A, the network device 110 may send a radio resource control (RRC) (re)configuration message to configure the NCB-based PUSCH 220. For example, the information configured by the RRC (re)configuration message may include an SRS configuration and a PUSCH configuration.

[0078] Network device 110 may transmit 230 the CSI-RS for the SRS transmission or an indication of the UL beam for the SRS transmission to terminal device 120. The terminal device may calculate 240 an UL precoder based on measurements of the CSI-RS or based on the indicated UL beam.

[0079] Terminal device 120 may then transmit a precoded SRS based on the calculated UL precoder to network device 110 (250). In response, the network device may perform channel measurements by measuring the SRS (260). In this manner, the network device can determine the PUSCH layer and precoder.

[0080] After the above procedure, the network device 110 may transmit an UL grant (e.g., a PUSCH configuration in DCI format 0_1, 0_2, or parameters for PUSCH transmission in the configuration grant) to schedule an NCB-based PUSCH transmission (270). The terminal device 120 may perform an NCB-based PUSCH transmission to the network device 110 based on the received UL grant (280).

[0081] 3A illustrates an example 300A of a transmission mode of STxMP in which embodiments of the present disclosure can be implemented. In this example, the transmission mode is coherent joint transmission (CJT) with multiple activated panel / antenna port sets. As shown in FIG. 3A, all antenna ports may be used jointly, regardless of whether they are included in the first panel 125-1 or the second panel 125-2.

[0082] FIG. 3B illustrates an example 300B of a transmission mode of STxMP in which embodiments of the present disclosure can be implemented. In this example, the transmission mode is noncoherent joint transmission (NCJT) with multiple activated panel / antenna port sets. As shown in FIG. 3B, the first panel 125-1 and the second panel 125-2 are noncoherent, while the antenna ports within the same panel are coherent. In the specific example of FIG. 3B, both one codeword (CW) transmission or two CW transmissions are supported. In some embodiments, CW-to-layer mapping allows two CW transmissions to be sent on more than four layers, while two CWs can be supported by transmitting one TB per panel / TRP, with each of the two CWs mapped to layers #1 to #4. In the specific example of FIG. 3B, one codeword (CW), i.e., one TB, is divided into four layers (layers #1 to #4).

[0083] In some embodiments, different layers may be simultaneously transmitted by different panels. Specifically, layers (0, ..., v1-1) are transmitted by the first panel 125-1, and layers (v1, ..., v-1) are transmitted by the second panel 125-2, where v1 is the number of layers transmitted through the first panel 125-1, and v is the total number of layers of the CW transmitted through both the first and second panels 125-1. As shown in FIG. 3B, layers #1 and #2 are transmitted through the first panel 125-1, and layers #3 and #4 are transmitted through the second panel 125-2.

[0084] In some embodiments, different precoding matrices (i.e., precoders) may be used by different panels. Specifically, a first precoding matrix is used by the first panel 125-1, and a second precoding matrix is used by the second panel 125-2. As shown in FIG. 4B, precoding matrix #1 / precoder #1 is used by the first panel 125-1, and precoding matrix #2 / precoder #2 is used by the second panel 125-2.

[0085] In some embodiments, different beamforming is used by different panels. As a result, a first beam may be formed by the first panel 125-1 and presented to the first TRP 130-1, and a second beam may be formed by the second panel 125-2 and presented to the second TRP 130-2. In this manner, the first and second TRPs 130 can jointly process uplink transmissions of the received PUSCH (such as NCB-based PUSCH STxMP).

[0086] It should be understood that as a general rule, non-coherent joint transmission may be performed for different TRPs between different panels / ports / beams / layers.

[0087] 3C illustrates an example 300C transmission mode of STxMP in which embodiments of the present disclosure can be implemented. In this example, the transmission mode is PUSCH with spatial division multiplexing (SDM) repetition (referred to as SDM repetition for brevity) of the same transport block (TB) per panel / antenna port set or for different TRPs. As shown in FIG. 3C, the first panel 125-1 and the second panel 125-2 are non-coherent, while the antenna ports within the same panel are coherent.

[0088] In some embodiments, the same TB is transmitted to multiple different TRPs simultaneously via different panels. Specifically, the same number of layers is assumed for the different panels. Specifically, layers (0,...,v) are transmitted by the first panel 125-1 and the second panel 125-2, where v is the total number of layers of the CW via both the first panel 125 and the second panel 125.

[0089] In some embodiments, different precoding matrices (i.e., precoders) may be used by different panels. Specifically, a first precoding matrix is used by the first panel 125-1, and a second precoding matrix is used by the second panel 125-2. As shown in FIG. 3C, precoding matrix #1 / precoder #1 is used by the first panel 125-1, and precoding matrix #2 / precoder #2 is used by the second panel 125-2.

[0090] In some embodiments, different beamforming is used by different panels. As a result, a first beam may be formed by the first panel 125-1 and presented to the first TRP 130-1, and a second beam may be formed by the second panel 125-2 and presented to the second TRP 130-2. In this manner, the first and second TRPs 130 can process received PUSCH uplink transmissions (such as NCB-based PUSCH STxMP) jointly (by soft combining) or separately.

[0091] In some embodiments, the communication network 100A may support a hybrid beamforming type associated with a digital precoding scheme and an analog beamforming scheme. In some embodiments, the digital precoding scheme may be one of joint precoding across panels or multiple TRPs, or individual precoding per panel or per TRP (e.g., different layers / TBs per panel / TRP). In some embodiments, the analog beamforming scheme may be one of full connectivity or subarray connectivity. In the full connectivity scheme, one antenna port is connected to all antenna elements. For example, the same beam is formed by multiple panels / towards different TRPs. In the subarray connectivity scheme, one antenna port is connected to a subset of antenna elements. For example, different beams are formed by one panel / towards different TRPs.

[0092] In some embodiments, the first coherence type indicates a panel-level coherence capability, the second coherence type indicates a port-level coherence capability within the panel, the first full power mode indicates a panel-level full power capability, or the second full power mode indicates a port-level full power capability within the panel.

[0093] In some embodiments, the first full power mode is one of a first panel level full power mode, a second panel level full power mode, or a third panel level full power mode. The first panel-level full power mode indicates that full power is achieved regardless of the number of panels used for uplink transmission. That is, panel-level full power mode is supported and the terminal device 120 can provide full power even if a subset of panels is used for transmission, which can be considered as a per-UE power constraint. The second panel-level full power mode indicates that full power supply is enabled when all panels of the terminal device 120 are used for uplink transmission. That is, panel-level full power mode 1 is supported, and the terminal device 120 can transmit at full power only when all panels are used for transmission. The third panel-level full power mode indicates that full power is enabled if all panels of the terminal device 120 are used for uplink transmission or if at least one specific precoder or precoder combination is configured. That is, panel-level full power mode 2 is supported and the terminal device 120 can transmit at full power only if all panels are used for transmission, or the terminal device 120 can transmit at full power only if the reported precoder / precoder combination is indicated.

[0094] Furthermore, in some embodiments, when the first full power mode is a third panel level full power mode, the transmit capability information further includes information regarding at least one particular precoder or combination of precoders.

[0095] Furthermore, the coherence type (including the first coherence type and the second coherence type) and the full power mode (including the first full power mode and the second full power mode) depend on one or both of the supported STxMP modes (i.e., transmission modes) and UE hybrid beamforming types (i.e., hybrid beamforming types). Specifically, in some embodiments, the first coherence type, the second coherence type, the first full power mode, and the second full power mode are associated with the transmission modes. Alternatively, or in addition, in some other embodiments, the first coherence type, the second coherence type, the first full power mode, and the second full power mode are associated with a hybrid beamforming type that is associated with a digital precoding scheme and an analog beamforming scheme. Such associations are discussed with reference to FIGS. 4A-4D.

[0096] 4A shows an example 400A of an antenna structure corresponding to a hybrid beamforming type. In this example, a combination of joint precoding and full connection is supported. In the specific example of FIG. 4A, the coherence type is fully coherent, and both the first full power mode and the second full power mode can be full power mode 0, full power mode 1, or full power mode 2. Such an antenna structure is particularly suitable for uplink CJT (such as coherent STxMP PUSCH transmission).

[0097] FIG. 4B illustrates an example antenna structure 400B supporting a hybrid beamforming type. In this example, a combination of individual precoding and subarrays (i.e., individual digital precoding and subarray-connected analog beamforming) is supported. In the specific example of FIG. 4B, the transmission mode is NCJT (e.g., noncoherent STxMP PUSCH transmission), and the coherence type is partially coherent (i.e., fully coherent within the first panel / second panel and noncoherent between the first panel 130-1 and the second panel 130-2). Furthermore, in the specific example of FIG. 4B, the first full power mode is full power mode 1 or 2 (i.e., full power mode 1 or 2 between the first panel 130-1 and the second panel 130-2), and the second full power mode is full power mode 0 (i.e., full power mode 0 within the first panel / second panel). Such an antenna structure is particularly suitable for uplink NCJT or uplink simultaneous SDM repetition, where the same TB is replaced with a subset of layers.

[0098] FIG. 4C illustrates an example antenna structure 400C supporting a hybrid beamforming type. In this example, a combination of joint precoding and subarrays (i.e., joint precoding and subarray-connected analog beamforming) is supported. In the specific example of FIG. 4C, the coherence type is partially coherent (i.e., fully coherent within the first panel / second panel and noncoherent between the first panel 130-1 and the second panel 130-2). Furthermore, in the specific example of FIG. 4C, the first full power mode is full power mode 1 or 2 (i.e., full power mode 1 or 2 between the first panel 130-1 and the second panel 130-2), and the second full power mode is full power mode 0 (i.e., full power mode 0 within the first panel / second panel). Such an antenna structure is particularly suitable for uplink simultaneous SDM repetition.

[0099] 4D shows an example 400D of an antenna structure supporting a hybrid beamforming type. In this example, a combination of discrete precoding and fully connected (i.e., discrete precoding and fully connected analog beamforming) is supported. In the specific example of FIG. 4D, the coherence type is fully coherent, and both the first and second modes can be full power mode 0, full power mode 1, or full power mode 2.

[0100] To better support NCB-based PUSCH STxMP, several open issues remain regarding the configuration of SRS resources or SRS resource sets for NCB-based PUSCH STxMP, reporting of UE capabilities for NCB-based PUSCH STxMP, and SRI indication for NCB-based PUSCH STxMP. Embodiments of the present disclosure provide communication solutions for STxMP to overcome these and other potential issues. These solutions are described below with reference to Figures 5-7.

[0101] 5-7 show schematic diagrams illustrating communication processes according to some exemplary embodiments of the present disclosure. For purposes of discussion, the processes will be described with reference to FIGS. 1A-1C.

[0102] Each of the processes may involve the terminal device 120, the network device 110 (either or both of the first network device 110-1 and the second network device 110-2), and optionally the TRP 130 (including the first TRP 130-1 and the second TRP 130-2). In other words, implementation of some embodiments does not depend on the TRP 130. The terminal device 120 may be provided with a first panel 125-1 and a second panel 125-2. Furthermore, the first panel 125-1 corresponds to a first set of antenna ports, and the second panel 125-2 corresponds to a second set of antenna ports.

[0103] Furthermore, the first TRP 130-1 is connected to the first network device 110-1, while the second TRP 130-2 is connected to the first network device 110-1 / second network device 110-2. In addition, the first TRP 130-1 and the second TRP may be in the same serving cell or in different serving cells.

[0104] Although several embodiments of the present disclosure are described below with reference to two TRPs and two panels, these embodiments are merely for illustrative purposes to aid those skilled in the art in understanding and practicing the present disclosure, and are not intended to imply any limitation on the scope of the present disclosure. It should be understood that the present disclosure described herein can be embodied in a variety of ways other than those described below.

[0105] Furthermore, it should be understood that operations at the terminal device 120 and the network device 110 should be consistent. In other words, the network device 110 and the terminal device 120 should have a common understanding of settings, parameters, etc. Such a common understanding may be implemented by any suitable interaction between the network device 110 and the terminal device 120, or by both the network device 110 and the terminal device 120 applying the same rules / policies. In the following, some operations will be described from the perspective of the terminal device 120, but it should be understood that corresponding operations should be performed by the network device 110. Similarly, some operations will be described from the perspective of the network device 110, but it should be understood that corresponding operations should be performed by the terminal device 120. For the sake of brevity, some identical or similar content will be omitted herein.

[0106] Furthermore, in the following description, several interactions are performed between terminal device 120 and network device 110 (e.g., exchanging capability-related information, configuring / scheduling / activating resources / transmissions, etc.). It should be understood that the interactions may be implemented in either one single signaling / message or multiple signaling / messages, including system information, radio resource control (RRC) messages, DCI, uplink control information (UCI), medium access control (MAC) control elements (CEs), etc. The present disclosure is not limited in this respect.

[0107] In some embodiments, one or more interactions may be specific to a particular panel, TRP, capability score, control resource set (CORESET), etc. In this manner, PUSCH STxMPs can be flexibly configured / activated.

[0108] Furthermore, although features / operations may be discussed individually in specific exemplary embodiments, it should be understood that, unless expressly stated to the contrary, these features / operations described in different exemplary embodiments may be used in any suitable combination. An example implementation of STxMP with two SRS resource sets

[0109] In this embodiment, two SRS resource sets are jointly applied to STxMP, and two SRS resource indicators are provided in a single DCI.

[0110] 5 shows a schematic diagram illustrating a communication process 500 according to some exemplary embodiments of the present disclosure. For purposes of discussion, the process 500 will be described with reference to FIGS. 1A-1C. 1. SRS settings

[0111] As shown in FIG. 5, the network device 110 may transmit an SRS configuration indicating a first set of SRS resources and a second set of SRS resources to the terminal device 120 (510). In response, the terminal device 120 may receive the SRS configuration. For example, the first and second sets of SRS resources may have a parameter "usage" set to "noncodebook." Assume that one port of SRS resources is configured for the first and second sets of SRS resources. It should be understood that the number of the first and second sets of SRS resources is not limited to one and may be any other suitable number.

[0112] In some embodiments, the SRS resources in the first and second sets of SRS resources can be used for simultaneous transmission. In some exemplary embodiments, SRS resources in the same set may be transmitted simultaneously. For example, SRS resources in the same set may only be transmitted via the same UL beam. As another example, the number of SRS resources in the same set may be less than or equal to the number indicated in the UE's capabilities corresponding to that set. The number indicated in the UE's capabilities may include per-panel or single-panel values reported by the UE for at least one of the following capabilities: maxNumberSRS-Ports, maxNumberMIMO-LayersNonCB-PUSCH, maxNumberSimultaneousSRS-ResourceTx, and maxNumberSRS-ResourcePerSet. It should be understood that other suitable forms of capabilities are also possible.

[0113] In some exemplary embodiments, SRS resources in different sets may be transmitted simultaneously. For example, SRS resources in different sets may be transmitted via different UL beams. As another example, the total number of SRS resources in both the first and second sets may be less than or equal to the number indicated in the UE capabilities corresponding to the first and second sets. The number indicated in the UE capabilities may include the total or STxMP values reported by the UE for at least one of the following capabilities: maxNumberSRS-Ports, maxNumberMIMO-LayersNonCB-PUSCH, maxNumberSimultaneousSRS-ResourceTx, and maxNumberSRS-ResourcePerSet. It should be understood that other suitable forms of capabilities are also possible.

[0114] In some embodiments, the first and second sets of SRS resources are configured with the same time domain configuration, i.e., both the first and second sets are configured with the same time domain behavior, and thus the SRS configuration can be used to configure all SRS resources to transmit with the same symbols.

[0115] For example, both the first set and the second set may be configured as "periodic." As another example, both the first set and the second set may be configured as "semi-persistent." As yet another example, both the first set and the second set may be configured as "non-periodic."

[0116] In some embodiments where both the first set and the second set may be configured as aperiodic, both the first set and the second set may be configured with the same trigger value or entry in the aperiodic SRS trigger list. For example, the value of the aperiodicSRS-ResourceTrigger or entry in the AperiodicSRS-ResourceTriggerList of each SRS-ResourceSet may be the same. In some embodiments where both the first set and the second set may be configured as "periodic" or "semi-persistent," both the first set and the second set may be configured with the same periodicity and / or offset.

[0117] In some embodiments, the first and second sets of SRS resources are configured with the same UL beam configuration. In other words, the first and second sets are configured with the same UL beam configuration. In this manner, the SRS configuration can be used to configure all SRS resources to be transmitted in the same symbol. In other words, the same value of the parameter "useIndicatedTCIState" may be configured for both the first and second sets. In some exemplary embodiments, the indicated TCI state may include at least two UL beams, and the mapping relationship between the UL beams and the SRS resource sets may be configured as one-to-one, sequential order, cyclic order, etc. In some exemplary embodiments, when the parameter "associated CSI-RS" is configured, the parameter "useIndicatedTCIState" may not be configured or may not be configured as "yes." In some exemplary embodiments, when the parameter "associated CSI-RS" is configured, the UE may acquire the UL beam and / or the UL precoder by measuring the associated CSI-RS. 2. SRI in DCI

[0118] Continuing to refer to FIG. 5, the network device 110 transmits a DCI for scheduling UL transmission to the terminal device 120 (520). The DCI includes a first SRI and a second SRI. The first SRI indicates the number of layers (for convenience, also referred to herein as the first number of layers) transmitted on the first panel 125-1. The second SRI indicates the number of layers (for convenience, also referred to herein as the second number of layers) transmitted on the second panel 125-2. The number of layers corresponds to the number of SRI values indicated by the first SRI or the second SRI. The SRI value indicates an index of the SRS resource (i.e., the i-th SRS resource).

[0119] In some embodiments, the first SRI and the second SRI may be carried in a single DCI or in multiple DCIs. In some embodiments where multiple DCIs are used, each of the multiple DCIs may include both the first SRI and the second SRI. In some embodiments where multiple DCIs are used, some of the multiple DCIs may include the first SRI and some of the multiple DCIs may include the second SRI.

[0120] In some alternative embodiments, the first SRI and the second SRI may be carried in a configuration grant. 1) The first SRI associated with the first panel

[0121]

number

[0122] In some alternative embodiments, the network device 110 may determine the bit width B1 of the first SRI based on the maximum number of layers supported for UL transmission, the third number of layers associated with the second SRI, and the number of SRS resources in the first set of SRS resources. In some embodiments, the network device 110 may determine the bit width B1 in this manner when the transmission mode of the STxMP is CJT or NCJT.

[0123] In some embodiments, the third number of layers may be equal to the second number of layers indicated by the second SRI. In some embodiments, the third number of layers may be equal to a predetermined value (also referred to herein as the first predetermined value for convenience). In some embodiments, the first predetermined value may be the minimum number of layers transmitted through the second panel 125-2. For example, the first predetermined value may be 1. It should be understood that the first predetermined value may be any other suitable value known to both the network device 110 and the terminal device 120 to have a common understanding of the bit width B1.

[0124]

number

[0125]

number

[0126]

number

[0127] In some embodiments, the first set of SRS resources may be configured with more SRS resources, a larger number of supported layers, a larger minimum number of layers and resources, a lower position in the added set list, or a lower SRS resource set ID than the second set of SRS resources. 2) A second SRI associated with the second panel

[0128] In some embodiments, the network device 110 may determine the bit width (denoted as B2 for convenience) of the second SRI based on the maximum number of layers supported for UL transmission, the fourth number of layers associated with the first SRI, and the number of SRS resources in the second set of SRS resources. In some embodiments, the network device 110 may determine the bit width B2 in this manner when the transmission mode of the STxMP is CJT or NCJT.

[0129] In some embodiments, the fourth number of layers may be equal to the first number of layers indicated by the first SRI. In some embodiments, the fourth number of layers may be equal to a predetermined value (also referred to herein as the second predetermined value for convenience). In some embodiments, the second predetermined value may be the minimum number of layers transmitted through the first panel 125-1. For example, the second predetermined value may be 1. It should be understood that the second predetermined value may be any other appropriate value known to both the network device 110 and the terminal device 120 so that they have a common understanding of the bit width B2.

[0130]

number

[0131] In some alternative embodiments, network device 110 may determine the bit width (denoted as B2 for convenience) of the second SRI based on the maximum number of layers supported for UL transmission, the fourth number of layers associated with the first SRI, the maximum number of layers supported for UL transmission in the second set of antenna ports (i.e., in second panel 125-2), and the number of SRS resources in the second set of SRS resources. In some embodiments, network device 110 may determine bit width B2 in this manner when the transmission mode of STxMP is CJT or NCJT.

[0132]

number

[0133] In some alternative embodiments, the network device 110 may determine the bit width (denoted as B2 for convenience) of the second SRI based on the maximum number of layers supported for UL transmission on the second set of antenna ports (i.e., on the second panel 125-2) and the number of SRS resources in the second set of SRS resources. In some embodiments, when the transmission mode of the STxMP is CJT or NCJT, the network device 110 may determine the bit width B2 in this manner.

[0134]

number

[0135] In some embodiments where the first number of layers is equal to the second number of layers, the network device 110 may determine the bit width B2 of the second SRI based on the maximum number of layers supported for UL transmission and the number of SRS resources in the second set of SRS resources. In some embodiments, the network device 110 may determine the bit width B2 in this manner when the transmission mode of the STxMP is SDM repetition.

[0136]

number

[0137] Such a setting of the first SRI and the second SRI can reduce the number of bits used for the second SRI.

[0138]

number

[0139]

number

[0140]

number

[0141]

number

[0142] If the UE supports operation with maxMIMO-Layers and the higher layer parameter maxMIMO-Layers in the PUSCH-ServingCellConfig of the serving cell is configured, L max is given by its parameters, otherwise L max is given by the maximum number of layers of PUSCH that the UE supports for the serving cell for non-codebook based operation. 3)STxMP PUSCH instruction

[0143] In some embodiments, network device 110 may transmit an indication to terminal device 120 that the UL transmission is at least one of a CJT transmission, an NCJT transmission, or an SDM repetition. In some embodiments, the indication may be carried in the RRC configuration, for example, by an STxMP enabler.

[0144] In some embodiments, the indication may be carried in the DCI. In this way, dynamic switching between the STxMP mode and other modes such as a single panel PUSCH, a single TRP PUSCH, or MTRP PUSCH repetition can be performed. Meanwhile, a specific codepoint for the STxMP mode may be configured.

[0145] In some embodiments, the indication may indicate different STxMP modes, including CJT transmission, NCJT transmission, or SDM repetition, for example, with more RRC configuration enablers and / or more specific codepoints configured for each different mode.

[0146] In some embodiments in which the indication may indicate multiple STxMP modes, the network device 110 may determine a bit width of a first SRI for each of the multiple STxMP modes and determine the largest bit width of the multiple STxMP modes as the final bit width of the first SRI. Similarly, the network device 110 may determine a bit width of a second SRI for each of the multiple STxMP modes and determine the largest bit width of the multiple STxMP modes as the final bit width of the second SRI. In this manner, the determination of the first and second SRIs can accommodate all possible STxMP modes. 3. Determine the port

[0147] Continuing with reference to FIG. 5, upon receiving the DCI, terminal device 120 determines (530) a first set of indices for antenna ports (e.g., PUSCH ports) associated with first panel 125-1. In some embodiments, terminal device 120 may determine (531) a first SRI from the DCI based on a bit width B1 of the first SRI. Terminal device 120 may determine bit width B1 in a manner similar to that done by network device 110, and details thereof are omitted here for brevity. Based on the determined first SRI and the received SRS configuration, terminal device 120 determines (532) a first set of antenna port indices.

[0148] In some embodiments, terminal device 120 may determine a first set of antenna port indexes based on the first number of layers indicated by the first SRI and the indexes of the SRS resources in the first set of SRS resources. For example, in the case of an STxMP PUSCH, terminal device 120 may transmit the PUSCH using the same antenna ports as the SRS ports of the SRS resources indicated by both SRS resource indicators. For example, the first set of antenna port indexes may be determined by the following equation (9): p i = 1000 + i (9) where p i represents the (i+1)th antenna port index in the first set of antenna port indexes, where i represents the index of the SRS resource in the first set of SRS resources, ranging from 1 to the first number of layers. It should be understood that Equation (9) is just an example, and other suitable methods are also possible.

[0149] Continuing to refer to FIG. 5, terminal device 120 further determines 540 a second set of antenna port indexes associated with second panel 125-2. In some embodiments, terminal device 120 determines 540 a second set of antenna port indexes associated with second panel 125-2 based on the bit width B2 of the second SRI. 、 Terminal device 120 may determine a second SRI from the DCI (541). Terminal device 120 may determine bit width B2 in a manner similar to that done by network device 110, and details thereof are omitted here for brevity. Based on the second SRI and the SRS configuration, terminal device 120 determines a second set of antenna port indexes (542).

[0150]

number

[0151]

number

[0152] In some embodiments, the PUSCH shares the same UL beam and / or precoder as the SRS resource corresponding to the indicated SRI.

[0153]

number

[0154] 5, once the first and second sets of antenna port indexes are determined, the terminal device 120 performs UL transmission (e.g., PUSCH transmission) on antenna ports (e.g., PUSCH ports) corresponding to the first and second sets of antenna port indexes in the first and second sets of antenna ports (550). Correspondingly, the network device 110 also determines the first set of antenna port indexes (560) and the second set of antenna port indexes (570) in a manner similar to that performed by the terminal device 120. Thereafter, the network device 110 can receive UL transmission on the antenna ports corresponding to the first and second sets of antenna port indexes.

[0155] Process 500 can better support NCB-based PUSCH STxMP. Example Implementation of STxMP with One SRS Resource Set

[0156] In this embodiment, one SRS resource set is applied to the STxMP, and one SRS resource indicator is provided in a single DCI.

[0157] 6 shows a schematic diagram illustrating a communication process 600, according to some exemplary embodiments of the present disclosure. For purposes of discussion, process 600 will be described with reference to FIGS. 1A-1C. 1. SRS settings

[0158] As shown in FIG. 6, the network device 110 may transmit an SRS configuration indicating a first set of SRS resources and a second set of SRS resources to the terminal device 120 (610). In response, the terminal device 120 may receive the SRS configuration. For example, the first set of SRS resources may be configured with a parameter "usage" set to "noncodebook" for STxMP, and the second set of SRS resources may be configured for non-STxMP. Assume that one port's SRS resource is configured for the first set and the second set of SRS resources. It should be understood that the number of the first set and the second set of SRS resources is not limited to one and may be any other suitable number.

[0159] In some embodiments, the SRS resources in the first set of SRS resources can be used for simultaneous transmission. For example, the SRS resources in the first set can be transmitted via different UL beams. For example, the maximum number of different UL beams associated with the first set can be two. It should be understood that any other suitable number is also possible.

[0160] As another example, the number of SRS resources in the same set may be less than or equal to the number indicated in the UE's capabilities corresponding to that set. The number indicated in the UE's capabilities may include the total or STxMP values reported by the UE for at least one of maxNumberSRS-Ports, maxNumberMIMO-LayersNonCB-PUSCH, maxNumberSimultaneousSRS-ResourceTx, and maxNumberSRS-ResourcePerSet. It should be understood that other suitable forms of capabilities are also possible.

[0161] In yet another example, the SRS resources in the first set may be divided into two subsets, one of which may correspond to a first panel and the other of which may correspond to a second panel.

[0162] In some embodiments, the first set of SRS resources and the second set of SRS resources cannot be used for simultaneous transmission, in other words, the first set of SRS resources and the second set of SRS resources cannot be transmitted simultaneously.

[0163] In some embodiments, the parameter "useIndicatedTCIState" is set for the first set of SRS resources. In some exemplary embodiments, the indicated TCI state may include at least two UL beam information, and the mapping relationship between the UL beam and the SRS resource set may be set to one-to-one, sequential order, cyclic order, etc. In some exemplary embodiments, when the parameter "associated CSI-RS" is set, the parameter "useIndicatedTCIState" may not be set or may be set to "yes." In some exemplary embodiments, when the parameter "associated CSI-RS" is set, the UE may obtain the UL beam and / or the UL precoder by measuring the associated CSI-RS. For example, the associated CSI-RS may be measured simultaneously via two UE panels. As another example, the associated CSI-RS may refer to two different CSI-RS resources that are transmitted simultaneously. 2. SRI in DCI

[0164] Continuing to refer to FIG. 6, the network device 110 transmits a DCI for scheduling UL transmission to the terminal device 120 (620). The DCI includes an SRI indicating the number of layers (for convenience, also referred to herein as the first number of layers) to be transmitted on each of the first panel 125-1 and the second panel 125-2. The number of layers corresponds to the number of SRI values indicated by the SRI. The SRI value indicates the index of the SRS resource (i.e., the i-th SRS resource).

[0165] In some embodiments, the SRI may be carried in a single DCI or in multiple DCIs. In some embodiments where multiple DCIs are used, the multiple DCIs may contain the same or different SRIs.

[0166] In some alternative embodiments, the SRI may be carried in a configuration grant.

[0167]

number

[0168]

number

[0169]

number

[0170]

number

[0171]

number

[0172] In some embodiments, network device 110 may transmit an indication to terminal device 120 that the UL transmission is at least one of a CJT transmission, an NCJT transmission, or an SDM repetition. In some embodiments, the indication may be carried in the RRC configuration, for example, by an STxMP enabler.

[0173] In some embodiments, the indication may be carried in the DCI. In this way, dynamic switching between the STxMP mode and other modes such as a single panel PUSCH, a single TRP PUSCH, or MTRP PUSCH repetition can be performed. Meanwhile, a specific codepoint for the STxMP mode may be configured.

[0174] In some embodiments, the indication may indicate different STxMP modes, including CJT transmission, NCJT transmission, or SDM repetition, for example, with more RRC configuration enablers and / or more specific codepoints configured for each different mode.

[0175] In some embodiments where the indication may indicate multiple STxMP modes, the network device 110 may determine the bit width of the SRI for each of the multiple STxMP modes and determine the maximum bit width of the multiple STxMP modes as the final bit width of the SRI. In this way, the SRI determination can accommodate all possible STxMP modes.

[0176]

number

[0177]

number

[0178] If the UE supports operation with maxMIMO-Layers and the higher layer parameter maxMIMO-Layers in the PUSCH-ServingCellConfig of the serving cell is configured, L max is given by its parameters, otherwise L max is given by the maximum number of layers of PUSCH that the UE supports for the serving cell for non-codebook based operation. 3. Determine the port

[0179] Continuing with reference to FIG. 6, upon receiving the DCI, terminal device 120 determines (630) a set of antenna port indexes associated with first panel 125-1 and second panel 125-2. In some embodiments, terminal device 120 determines (630) a set of antenna port indexes associated with first panel 125-1 and second panel 125-2 based on the bit width B3 of the SRI. 、 Terminal device 120 may determine an SRI from the DCI (631). Terminal device 120 may determine bit width B3 in a manner similar to that done by network device 110, and details thereof are omitted here for brevity. Based on the determined SRI and the received SRS configuration, terminal device 120 determines a set of antenna port indexes (632).

[0180]

number

[0181] For example, if SRS resources 0 and 1 are associated with the first panel and SRS resources 2 and 3 are associated with the second panel, the SRS ports of the second and third SRS resources are indexed as 1000 and 1001. If the first set includes four SRS resources, the corresponding SRS ports are indexed as 1000 and 1001. If the first SRS resource indicator indicates the SRI as "1,2" (for example, as in Tables 4 and 5), the corresponding PUSCH ports are 1000 and 1001. The terminal device transmits the same 1-layer PUSCH simultaneously on both panels, in which case port 1001 is used with the first panel and port 1000 is used with the second panel.

[0182]

number

[0183]

number

[0184] 6, once the set of antenna port indexes is determined, the terminal device 120 performs UL transmission on the set of antenna ports corresponding to the set of antenna port indexes in the first and second sets of antenna ports (640). Correspondingly, the network device 110 also determines the set of antenna port indexes in the same manner as the terminal device 120 (650). Thereafter, the network device 110 can receive UL transmission on the set of antenna ports corresponding to the first and second sets of antenna port indexes.

[0185] The process 600 also allows for better support of NCB-based PUSCH STxMP. Example implementation of STxMP with default panel

[0186] In this embodiment, a default panel is defined for the STxMP. The default panel is associated with the BWP configured for the terminal device 120. The default panel may also be referred to as a default capability value set. In other words, the default panel corresponds to a set of capability values, i.e., a default capability value set.

[0187] 7 shows a schematic diagram illustrating a communication process 700 according to some exemplary embodiments of the present disclosure. For purposes of discussion, process 700 will be described with reference to FIGS. 1A-1C.

[0188] 7, the terminal device 120 determines (710) a default capability set associated with the BWP configured for the terminal device 120. In some embodiments, a panel with lower capabilities may be determined as the default panel. In some alternative embodiments, a panel with higher capabilities may be determined as the default panel. It should be understood that any other suitable method is also possible.

[0189] In some embodiments, a default BWP may be associated with a panel with lower capabilities. In other words, a BWP associated with a panel with lower capabilities is the default BWP. For example, a BWP with a particular ID may be considered the default BWP.

[0190] Furthermore, assuming a default panel means that the UE is not expected (or "the UE is not expected" or "the UE may not expect") to transmit beyond the UE's default panel capabilities, and this applies to at least SRS / PUCCH / PUSCH transmission, UL BWP selection, and UL beam selection. For example, if a UE reports two capability values or capability sets, namely, a 2-port SRS for capability value or capability set 1 and a 4-port SRS for capability value or capability set 2, then initially, PUSCH transmissions with more than two layers are not supported.

[0191] A "less capable panel" may refer to a lower capability value or set of capability values that includes at least lower values of maxNumberSRS-Ports, maxNumberMIMO-LayersNonCB-PUSCH, maxNumberSimultaneousSRS-ResourceTx, maxNumberSRS-ResourcePerSet. Where single panel and STxMP are specified, the less capable panel may be associated with single panel transmission.

[0192] 7, terminal device 120 performs UL transmission based on a default capability value set (720). In some embodiments, terminal device 120 performs initial transmission with network device 110 by applying the default capability value set (721).

[0193] In some embodiments, terminal device 120 determines whether a fallback condition is met (722). If the fallback condition is met, terminal device 120 may perform UL transmission by applying a default capability value set or by falling back to the default capability value set (723). Correspondingly, network device 110 may also determine a default capability value set configured for terminal device 120 (730) and receive UL transmission based on the default capability value set.

[0194] In some embodiments, scenarios requiring a fallback to a default capability set may include at least one of the following: an initial transmission during the period between reporting a capability set and transmitting the first communication report; During initial or random access During the period following reset, initial access, or random access During periods of link failure or poor link condition, e.g., when BLER / RSRP / SINR is worse than the threshold. When scheduled by a specific DCI format, e.g., a fallback DCI format, more specifically DCI format 0_0 If you do not receive a confirmation message for a communication report after sending the communication report for a certain period of time. If the default BWP / CC is activated When default TCI states, spatial relationships, or QCL assumptions are applied

[0195] When using the default panel associated with the BWP, the BWP switching indication may be used to indicate switching between UE panels, which can avoid mismatches in UE UL panel assumptions in special scenarios.

[0196] It should be appreciated that the default panel may apply to any suitable UL transmission, e.g., NCB-based or CB-based PUSCH transmission, STxMP or non-STxMP, and this disclosure is not limited in this respect. Example Implementation of UE Capability Reporting

[0197] Embodiments of the present disclosure also provide a solution for reporting UE capabilities, in which terminal device 120 may transmit or report to network device 110 at least one of a first set of terminal device 120 capability values associated with a first set of antenna ports, a second set of terminal device 120 capability values associated with a second set of antenna ports, or a third set of terminal device capability values associated with the first and second sets of antenna ports.

[0198] In other words, terminal device 120 may report a value for each panel and a total value for a UE capability type, or may report a single panel and STxMP value for a UE capability type.

[0199] The UE capability types may include at least one of the following: supportedSRS-Resources Defines support for SRS resources. Capability signaling includes the following indications: - maxNumberAperiodicSRS-PerBWP indicates the supported maximum number of aperiodic SRS resources that can be configured for the UE per BWP. - maxNumberAperiodicSRS-PerBWP-PerSlot indicates the maximum supported number of aperiodic SRS resources per slot within a BWP. - maxNumberPeriodicSRS-PerBWP indicates the maximum supported number of periodic SRS resources per BWP. - maxNumberPeriodicSRS-PerBWP-PerSlot indicates the maximum supported number of periodic SRS resources per slot within a BWP. - maxNumberSemiPersistentSRS-PerBWP indicates the supported maximum number of semi-persistent SRS resources that can be configured for a UE per BWP. - maxNumberSemiPersistentSRS-PerBWP-PerSlot indicates the maximum supported number of semi-persistent SRS resources per slot in a BWP. - maxNumberSRS-Ports-PerResource indicates the maximum supported number of SRS antenna ports per SRS resource. If this field is not included, the UE supports one periodic SRS resource, one aperiodic SRS resource per BWP, and no semi-persistent SRS resources; one periodic SRS resource, one aperiodic SRS resource per slot and per BWP, and no semi-persistent SRS resources; and one SRS antenna port per SRS resource. srs-AssocCSI-RS Parameters for the computation of the precoder for SRS transmission based on channel measurements using the associated NZP CSI-RS resource (srs-AssocCSI-RS). A UE that supports this feature must also indicate support for non-codebook-based PUSCH transmission. This capability signaling includes the following list of parameters: - maxNumberTxPortsPerResource indicates the maximum number of Tx ports in the resource. - maxNumberResourceSTxMP indicates the maximum number of resources for simultaneous transmission between multiple UE panels. - maxNumberResourcesPerBand indicates the maximum number of resources that may exist simultaneously on all CCs in a band. - totalNumberTxPortsPerBand indicates the total number of Tx ports that exist simultaneously on all CCs in the band. · maxNumberMIMO-LayersNonCB-PUSCH Defines the maximum supported number of MIMO layers at a UE for PUSCH transmission with non-codebook precoding. This feature is not supported for SUL. A UE that supports non-codebook-based PUSCH transmission must also indicate support for maxNumberMIMO-LayersNonCB-PUSCH, maxNumberSRS-ResourcePerSet, and maxNumberSimultaneousSRS-ResourceTx. · maxNumberSimultaneousSRS-ResourceTx For the UE, this defines the maximum number of SRS resources transmitted simultaneously in one symbol for non-codebook based transmission. This feature is not supported for SUL. · maxNumberSRS-ResourcePerSet Defines the maximum number of SRS resources per SRS resource set configured for codebook-based or non-codebook-based transmission for the UE. This feature is not supported for SUL. Exemplary implementation of relaxed restrictions

[0200] To support UEs that can simultaneously use multiple panels with different panel capabilities, at least the following restrictions must be removed:

[0201] For example, if two SRS resource sets are configured in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 and the upper layer parameter "usage" of SRS-ResourceSet is set to "nonCodebook," it is not expected that the UE will be configured with different numbers of SRS resources in the two SRS resource sets. If STxMP is supported, this restriction may be removed. In other words, if STxMP is supported, different numbers of SRS resources can be configured in the two SRS resource sets.

[0202] As another example, if configured, only one NZP CSI-RS resource can be configured in a UE for an SRS resource set whose upper layer parameter "usage" of SRS-ResourceSet is set to "nonCodebook". If STxMP is supported, this restriction may be removed. In other words, if STxMP is supported, multiple NZP CSI-RS resources can be configured. Furthermore, multiple NZP CSI-RS resources can be transmitted simultaneously. Exemplary implementation of the method

[0203] In response to the above, embodiments of the present disclosure provide communication methods implemented in a terminal device and a network device, which are described below with reference to FIGS.

[0204] 8 illustrates an exemplary communication method 800 implemented in a terminal device according to some embodiments of the present disclosure. For example, method 800 may be performed in terminal device 120 such as that shown in FIGS. 1A-1C. For purposes of discussion, method 800 will be described with reference to FIGS. 1A-1C. It should be understood that method 800 may include additional blocks not shown and / or omit some blocks shown, and that the scope of the present disclosure is not limited in this respect.

[0205] At block 810, terminal device 120 receives DCI for scheduling uplink transmissions, the DCI including a first SRS resource indicator and a second SRS resource indicator.

[0206] In block 820, terminal device 120 determines a first set of antenna port indexes based on a first number of layers of the uplink transmission and the indexes of the SRS resources within the first set of SRS resources, where the first number of layers is the number of layers transmitted on the first set of antenna ports and is indicated by the first SRS resource indicator.

[0207] In block 830, terminal device 120 determines a second set of antenna port indexes based on the indices of the SRS resources in the second set of SRS resources, the second number of layers of the uplink transmission, and the number of SRS resources in the first set of SRS resources, where the second number of layers is the number of layers transmitted on the second set of antenna ports and is indicated by a second SRS resource indicator.

[0208] At block 840, terminal device 120 performs uplink transmission on antenna ports in the first and second sets of antenna ports corresponding to the first and second sets of antenna port indexes.

[0209] In some embodiments, terminal device 120 may receive an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, the SRS resources in the first set and the second set of SRS resources being usable for simultaneous transmission, the first set and the second set of SRS resources being configured with the same time domain configuration and the same uplink beam configuration.

[0210] In some embodiments, terminal device 120 may determine the first SRS resource indicator from the DCI by determining a bit width of the first SRS resource indicator based on the maximum number of layers supported for uplink transmission, the third number of layers associated with the second SRS resource indicator, and the number of SRS resources in the first set of SRS resources, or by determining a bit width of the first SRS resource indicator based on the maximum number of layers supported for uplink transmission on the first set of antenna ports and the number of SRS resources in the first set of SRS resources. In some embodiments, the third number of layers is equal to the second number of layers or the first predetermined value.

[0211] In some embodiments, terminal device 120 may determine the second SRS resource indicator from the DIC by: determining a bit width of the second SRS resource indicator based on the maximum number of layers supported for uplink transmission, the fourth number of layers associated with the first SRS resource indicator, and the number of SRS resources in the second set of SRS resources; determining a bit width of the second SRS resource indicator based on the maximum number of layers supported for uplink transmission, the fourth number of layers associated with the first SRS resource indicator, the maximum number of layers supported for uplink transmission on the second set of antenna ports, and the number of SRS resources in the second set of SRS resources; or determining a second bit width of the second SRS resource indicator based on the maximum number of layers supported for uplink transmission on the second set of antenna ports and the number of SRS resources in the second set of SRS resources. In some embodiments, the fourth number of layers is equal to the first number of layers or a second predetermined value.

[0212] In some embodiments, terminal device 120 may receive an indication that the uplink transmission is a CJT transmission or an NCJT transmission.

[0213] In some embodiments, terminal device 120 may transmit at least one of a first set of terminal device capability values associated with a first set of antenna ports, a second set of terminal device capability values associated with a second set of antenna ports, or a third set of terminal device capability values associated with the first and second sets of antenna ports.

[0214] In some embodiments, the first set of antenna ports corresponds to a first panel, the second set of antenna ports corresponds to a second panel, and the uplink transmission is an NCB-based PUSCH and is performed over multiple TRPs.

[0215] 9 illustrates another exemplary communication method 900 implemented in a terminal device, according to some embodiments of the present disclosure. For example, method 900 may be performed in terminal device 120, such as that shown in FIGS. 1A-1C. For purposes of discussion, method 900 will be described with reference to FIGS. 1A-1C. It should be understood that method 900 may include additional blocks not shown and / or omit some blocks shown, and that the scope of the present disclosure is not limited in this respect.

[0216] At block 910, terminal device 120 receives DCI for scheduling uplink transmissions, the DCI including an SRS resource indicator.

[0217] In block 920, terminal device 120 determines a set of antenna port indexes based on the number of layers of the uplink transmission, the indexes of the SRS resources in the first set of SRS resources, and the number of SRS resources in the first set of SRS resources, where the number of layers is the number of layers transmitted on each of the first and second sets of antenna ports and is indicated by the SRS resource indicator.

[0218] At block 930, terminal device 120 performs uplink transmission on a set of antenna ports corresponding to the set of antenna port indices in the first and second sets of antenna ports.

[0219] In some embodiments, terminal device 120 may receive an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, where the SRS resources in the first set of SRS resources can be used for simultaneous transmission, and the first and second sets of SRS resources cannot be used for simultaneous transmission.

[0220] In some embodiments, terminal device 120 may determine the SRS resource indicator from the DCI by determining the bit width of the SRS resource indicator based on the maximum number of layers supported for uplink transmission and half the number of SRS resources in the first set of SRS resources.

[0221] In some embodiments, terminal device 120 may receive an indication that the uplink transmission is an SDM repetition.

[0222] In some embodiments, terminal device 120 may transmit at least one of a first set of terminal device capability values associated with a first set of antenna ports, a second set of terminal device capability values associated with a second set of antenna ports, or a third set of terminal device capability values associated with the first and second sets of antenna ports.

[0223] In some embodiments, the first set of antenna ports corresponds to a first panel, the second set of antenna ports corresponds to a second panel, and the uplink transmission is an NCB-based PUSCH and is performed over multiple TRPs.

[0224] 10 illustrates yet another exemplary communication method 1000 implemented in a terminal device, according to some embodiments of the present disclosure. For example, method 1000 may be performed in a terminal device 120 such as those illustrated in FIGS. 1A-1C. For purposes of discussion, method 1000 will be described with reference to FIGS. 1A-1C. It should be understood that method 1000 may include additional blocks not shown and / or omit some blocks shown, and that the scope of the present disclosure is not limited in this respect.

[0225] In block 1010, terminal device 120 determines the default capability set associated with the BWP configured for the terminal device.

[0226] In block 1020, the terminal device 120 performs at least one of performing an initial transmission with the network device by applying a default capability value set, or performing an uplink transmission by applying a default capability value set in accordance with a determination that a fallback condition is met.

[0227] 11 illustrates an exemplary communication method 1100 implemented in a network device according to some embodiments of the present disclosure. For example, method 1100 may be performed in a network device 110 (network device 110-1 or 110-2) such as those illustrated in FIGS. 1A-1C. For purposes of discussion, method 1100 will be described with reference to FIGS. 1A-1C. It should be understood that method 1100 may include additional blocks not shown and / or omit some of the blocks shown, and that the scope of the present disclosure is not limited in this respect.

[0228] At block 1110, the network device 110 transmits DCI for scheduling an uplink transmission, the DCI including a first SRS resource indicator and a second SRS resource indicator.

[0229] At block 1120, the network device 110 determines a first set of antenna port indexes based on a first number of layers of the uplink transmission and indexes of SRS resources within the first set of SRS resources, where the first number of layers is the number of layers transmitted on the first set of antenna ports and is indicated by the first SRS resource indicator.

[0230] At block 1130, the network device 110 determines a second set of antenna port indexes based on the indexes of the SRS resources in the second set of SRS resources, the second number of layers of the uplink transmission, and the number of SRS resources in the first set of SRS resources, where the second number of layers is the number of layers transmitted on the second set of antenna ports and is indicated by a second SRS resource indicator.

[0231] At block 1140, the network device 110 performs uplink transmissions on antenna ports in the first and second sets of antenna ports corresponding to the first and second set of antenna port indexes.

[0232] In some embodiments, the network device 110 may transmit an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, where the SRS resources in the first set and the second set of SRS resources can be used for simultaneous transmission, and the first set and the second set of SRS resources are configured with the same time domain configuration and the same uplink beam configuration.

[0233] In some embodiments, network device 110 may determine the first SRS resource indicator by determining a bit width of the first SRS resource indicator based on the maximum number of layers supported for uplink transmission, the third number of layers associated with the second SRS resource indicator, and the number of SRS resources in the first set of SRS resources, or by determining a bit width of the first SRS resource indicator based on the maximum number of layers supported for uplink transmission on the first set of antenna ports and the number of SRS resources in the first set of SRS resources. In some embodiments, the third number of layers is equal to the second number of layers or the first predetermined value.

[0234] In some embodiments, network device 110 may determine the second SRS resource indicator by: determining a bit width of the second SRS resource indicator based on the maximum number of layers supported for uplink transmission, the fourth number of layers associated with the first SRS resource indicator, and the number of SRS resources in the second set of SRS resources; determining a bit width of the second SRS resource indicator based on the maximum number of layers supported for uplink transmission, the fourth number of layers associated with the first SRS resource indicator, the maximum number of layers supported for uplink transmission on the second set of antenna ports, and the number of SRS resources in the second set of SRS resources; or determining a second bit width of the second SRS resource indicator based on the maximum number of layers supported for uplink transmission on the second set of antenna ports and the number of SRS resources in the second set of SRS resources. In some embodiments, the fourth number of layers is equal to the first number of layers or a second predetermined value.

[0235] In some embodiments, the network device 110 may transmit an indication that the uplink transmission is a CJT transmission or an NCJT transmission.

[0236] In some embodiments, the network device 110 may receive at least one of a first set of capability values for a terminal device associated with a first set of antenna ports, a second set of capability values for a terminal device associated with a second set of antenna ports, or a third set of capability values for a terminal device associated with the first and second sets of antenna ports.

[0237] In some embodiments, the first set of antenna ports corresponds to a first panel, the second set of antenna ports corresponds to a second panel, and the uplink transmission is an NCB-based PUSCH and is performed over multiple TRPs.

[0238] 12 illustrates another exemplary communication method 1200 implemented in a network device according to some embodiments of the present disclosure. For example, method 1200 may be performed in a network device 110 (network device 110-1 or 110-2) as shown in FIGS. 1A-1C. For purposes of discussion, method 1200 will be described with reference to FIGS. 1A-1C. It should be understood that method 1200 may include additional blocks not shown and / or omit some blocks shown, and that the scope of the present disclosure is not limited in this respect.

[0239] At block 1210, the network device 110 transmits DCI for scheduling an uplink transmission. The DCI includes an SRS resource indicator.

[0240] At block 1220, the network device 110 determines a set of antenna port indexes based on the number of layers of the uplink transmission, the indexes of the SRS resources in the first set of SRS resources, and the number of SRS resources in the first set of SRS resources, where the number of layers is the number of layers transmitted on each of the first and second sets of antenna ports and is indicated by the SRS resource indicator.

[0241] At block 1230, the network device 110 performs uplink transmission on a set of antenna ports corresponding to the set of antenna port indices in the first and second set of antenna ports.

[0242] In some embodiments, network device 110 may transmit an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, where the SRS resources in the first set of SRS resources can be used for simultaneous transmission, and the first set and the second set of SRS resources cannot be used for simultaneous transmission.

[0243] In some embodiments, the network device 110 may determine the SRS resource indicator from the DCI by determining the bit width of the SRS resource indicator based on the maximum number of layers supported for uplink transmission and half the number of SRS resources in the first set of SRS resources.

[0244] In some embodiments, the network device 110 may transmit an indication that the uplink transmission is an SDM repetition.

[0245] In some embodiments, the network device 110 may receive at least one of a first set of capability values for a terminal device associated with a first set of antenna ports, a second set of capability values for a terminal device associated with a second set of antenna ports, or a third set of capability values for a terminal device associated with the first and second sets of antenna ports.

[0246] In some embodiments, the first set of antenna ports corresponds to a first panel, the second set of antenna ports corresponds to a second panel, and the uplink transmission is an NCB-based PUSCH and is performed over multiple TRPs.

[0247] 13 illustrates yet another exemplary communication method 1300 implemented in a network device, according to some embodiments of the present disclosure. For example, method 1300 may be performed in a network device 110 (network device 110-1 or 110-2) as shown in FIGS. 1A-1C. For purposes of discussion, method 1300 will be described with reference to FIGS. 1A-1C. It should be understood that method 1300 may include additional blocks not shown and / or omit some blocks shown, and that the scope of the present disclosure is not limited in this respect.

[0248] In block 1310, the network device 110 determines a default capability set for the terminal device 120 associated with the BWP configured for the terminal device.

[0249] In block 1320, the network device 110 performs at least one of performing an initial transmission with the terminal device 120 by applying a default capability value set, or performing an uplink transmission by applying a default capability value set in accordance with a determination that a fallback condition is met.

[0250] 14 is a schematic block diagram of an apparatus 1400 suitable for implementing embodiments of the present disclosure. The apparatus 1400 may be considered a further exemplary implementation of the terminal device 120 and the network devices 110-1 and 110-2 shown in FIGS. 1A-1C. Thus, the apparatus 1400 may be implemented in, or at least as part of, the terminal device 120 and the network devices 110-1 and 110-2.

[0251] As shown, the apparatus 1400 includes a processor 1410, a memory 1420 coupled to the processor 1410, a suitable transmitter (TX) and receiver (RX) 1440 coupled to the processor 1410, and a communication interface coupled to the TX / RX 1440. The memory 1410 stores at least a portion of a program 1430. The TX / RX 1440 is for bidirectional communication. The TX / RX 1440 has at least one antenna to facilitate communication, although in practice, the access nodes described herein may have multiple antennas. The communication interface may represent any interface required for communication with other network elements, such as an X2 interface for bidirectional communication between eNBs, an S1 interface for communication between a Mobility Management Entity (MME) / Serving Gateway (S-GW) and an eNB, a Un interface for communication between an eNB and a Relay Node (RN), or a Uu interface for communication between an eNB and a terminal device.

[0252] The program 1430 may be considered to include program instructions that, when executed by an associated processor 1410, enable the device 1400 to operate in accordance with embodiments of the present disclosure, as discussed herein with reference to FIGS. 1A-13. The embodiments herein may be implemented by computer software, hardware, or a combination of software and hardware executable by the processor 1410 of the device 1400. The processor 1410 may be configured to implement various embodiments of the present disclosure. Additionally, the combination of the processor 1410 and the memory 1420 may constitute a processing means 1450 suitable for implementing various embodiments of the present disclosure.

[0253] Memory 1420 may be of any type suitable for the local technology network and may be implemented using any suitable data storage technology (e.g., but not limited to, computer-readable non-transitory storage media, semiconductor-based storage devices, magnetic storage devices and systems, optical storage devices and systems, fixed and removable memory, etc.). Although only one memory 1420 is shown in device 1400, device 1400 may include multiple physically distinct memory modules. Processor 1410 may be of any type suitable for the local technology network and may include, by way of example and not limitation, one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor configuration. Device 1400 may have multiple processors, e.g., application-specific integrated circuit chips time-slaved to a clock synchronized with a master processor.

[0254] In some embodiments, a terminal device configured with a first set of antenna ports and a second set of antenna ports includes circuitry configured to receive a DCI for scheduling uplink transmissions, determine a first set of antenna port indexes based on a first number of layers of the uplink transmission and indexes of SRS resources in the first set of SRS resources, determine a second set of antenna port indexes based on indexes of SRS resources in the second set of SRS resources, a second number of layers of the uplink transmission, and the number of SRS resources in the first set of SRS resources, and perform the uplink transmissions on antenna ports in the first and second sets of antenna ports corresponding to the first and second set of antenna port indexes. The DCI includes a first SRS resource indicator and a second SRS resource indicator. The first number of layers is the number of layers transmitted on the first set of antenna ports and is indicated by the first SRS resource indicator. The second number of layers is the number of layers transmitted on the second set of antenna ports and is indicated by the second SRS resource indicator.

[0255] In some embodiments, the circuitry may be further configured to receive an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, wherein the SRS resources in the first set and the second set of SRS resources can be used for simultaneous transmission, and the first set and the second set of SRS resources are configured with the same time domain configuration and the same uplink beam configuration.

[0256] In some embodiments, the circuitry may be further configured to determine the first SRS resource indicator from the DCI by determining a bit-width of the first SRS resource indicator based on a maximum number of layers supported for uplink transmission, a third number of layers associated with the second SRS resource indicator, and the number of SRS resources in the first set of SRS resources, or by determining a bit-width of the first SRS resource indicator based on a maximum number of layers supported for uplink transmission on the first set of antenna ports and the number of SRS resources in the first set of SRS resources. In some embodiments, the third number of layers is equal to the second number of layers or the first predetermined value.

[0257] In some embodiments, the circuitry may be further configured to determine the second SRS resource indicator from the DIC by: determining a bit-width of the second SRS resource indicator based on a maximum number of layers supported for uplink transmission, a fourth number of layers associated with the first SRS resource indicator, and the number of SRS resources in the second set of SRS resources; determining a bit-width of the second SRS resource indicator based on a maximum number of layers supported for uplink transmission, the fourth number of layers associated with the first SRS resource indicator, the maximum number of layers supported for uplink transmission on the second set of antenna ports, and the number of SRS resources in the second set of SRS resources; or determining a second bit-width of the second SRS resource indicator based on a maximum number of layers supported for uplink transmission on the second set of antenna ports and the number of SRS resources in the second set of SRS resources. In some embodiments, the fourth number of layers is equal to the first number of layers or a second predetermined value.

[0258] In some embodiments, the circuitry may be further configured to receive an indication indicating that the uplink transmission is a CJT transmission or an NCJT transmission.

[0259] In some embodiments, the circuitry may be further configured to transmit at least one of a first set of capability values of a terminal device associated with the first set of antenna ports, a second set of capability values of a terminal device associated with the second set of antenna ports, or a third set of capability values of a terminal device associated with the first and second sets of antenna ports.

[0260] In some embodiments, the first set of antenna ports corresponds to a first panel, the second set of antenna ports corresponds to a second panel, and the uplink transmission is an NCB-based PUSCH and is performed over multiple TRPs.

[0261] In some embodiments, a terminal device configured with a first set and a second set of antenna ports includes circuitry configured to receive DCI for scheduling uplink transmission, determine a set of antenna port indexes based on a number of layers of the uplink transmission, an index of an SRS resource in the first set of SRS resources, and the number of SRS resources in the first set of SRS resources, and perform the uplink transmission on the set of antenna ports in the first set and the second set of antenna ports corresponding to the set of antenna port indexes. The DCI includes an SRS resource indicator. The number of layers is the number of layers to be transmitted on each of the first set and the second set of antenna ports and is indicated by the SRS resource indicator.

[0262] In some embodiments, the circuitry may be further configured to receive an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, wherein SRS resources in the first set of SRS resources can be used for simultaneous transmissions, and the first set and second set of SRS resources cannot be used for simultaneous transmissions.

[0263] In some embodiments, the circuitry may be further configured to determine the SRS resource indicator from the DCI by determining a bit width of the SRS resource indicator based on a maximum number of layers supported for uplink transmission and half the number of SRS resources in the first set of SRS resources.

[0264] In some embodiments, the circuitry may be further configured to receive an indication indicating that the uplink transmission is an SDM repetition.

[0265] In some embodiments, the circuitry may be further configured to transmit at least one of a first set of capability values of a terminal device associated with the first set of antenna ports, a second set of capability values of a terminal device associated with the second set of antenna ports, or a third set of capability values of a terminal device associated with the first and second sets of antenna ports.

[0266] In some embodiments, the first set of antenna ports corresponds to a first panel, the second set of antenna ports corresponds to a second panel, and the uplink transmission is an NCB-based PUSCH and is performed over multiple TRPs.

[0267] In some embodiments, a terminal device in which the first and second sets of antenna ports are configured includes circuitry configured to perform at least one of: determining a default capability value set associated with a BWP configured for the terminal device and performing an initial transmission with the network device by applying the default capability value set; or, following a determination that a fallback condition is met, performing an uplink transmission by applying the default capability value set.

[0268] In some embodiments, the network device includes circuitry configured to: send DCI for scheduling uplink transmission to a terminal device configured with a first set of antenna ports; determine a first set of antenna port indexes based on a first number of layers of the uplink transmission and indexes of SRS resources in the first set of SRS resources; determine a second set of antenna port indexes based on indexes of SRS resources in the second set of SRS resources, a second number of layers of the uplink transmission, and the number of SRS resources in the first set of SRS resources; and perform the uplink transmission on antenna ports in the first and second sets of antenna ports corresponding to the first and second set of antenna port indexes. The DCI includes a first SRS resource indicator and a second SRS resource indicator. The first number of layers is the number of layers transmitted on the first set of antenna ports and is indicated by the first SRS resource indicator. The second number of layers is the number of layers transmitted on the second set of antenna ports and is indicated by the second SRS resource indicator.

[0269] In some embodiments, the circuitry may be further configured to transmit an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, wherein the SRS resources in the first set and the second set of SRS resources can be used for simultaneous transmission, and the first set and the second set of SRS resources are configured with the same time domain configuration and the same uplink beam configuration.

[0270] In some embodiments, the circuitry may be further configured to determine the first SRS resource indicator by: determining a bit-width of the first SRS resource indicator based on a maximum number of layers supported for uplink transmission, a third number of layers associated with the second SRS resource indicator, and the number of SRS resources in the first set of SRS resources; or by determining a bit-width of the first SRS resource indicator based on a maximum number of layers supported for uplink transmission on the first set of antenna ports and the number of SRS resources in the first set of SRS resources. In some embodiments, the third number of layers is equal to the second number of layers or the first predetermined value.

[0271] In some embodiments, the circuitry may be further configured to determine the second SRS resource indicator by: determining a bit-width of the second SRS resource indicator based on a maximum number of layers supported for uplink transmission, a fourth number of layers associated with the first SRS resource indicator, and the number of SRS resources in the second set of SRS resources; determining a bit-width of the second SRS resource indicator based on a maximum number of layers supported for uplink transmission, the fourth number of layers associated with the first SRS resource indicator, the maximum number of layers supported for uplink transmission on the second set of antenna ports, and the number of SRS resources in the second set of SRS resources; or determining a second bit-width of the second SRS resource indicator based on a maximum number of layers supported for uplink transmission on the second set of antenna ports and the number of SRS resources in the second set of SRS resources. In some embodiments, the fourth number of layers is equal to the first number of layers or a second predetermined value.

[0272] In some embodiments, the circuitry may be further configured to transmit an indication that the uplink transmission is a CJT transmission or an NCJT transmission.

[0273] In some embodiments, the network device includes circuitry configured to: send DCI for scheduling uplink transmission to a terminal device configured with the first and second sets of antenna ports; determine a set of antenna port indexes based on a number of layers of the uplink transmission, an index of an SRS resource in the first set of SRS resources, and the number of SRS resources in the first set of SRS resources; and perform the uplink transmission on the set of antenna ports in the first and second sets of antenna ports corresponding to the set of antenna port indexes. The DCI includes an SRS resource indicator. The number of layers is the number of layers to be transmitted on each of the first and second sets of antenna ports and is indicated by the SRS resource indicator.

[0274] In some embodiments, the circuitry may be further configured to transmit an SRS configuration indicating a first set of SRS resources and a second set of SRS resources, wherein SRS resources in the first set of SRS resources can be used for simultaneous transmission, and the first set and second set of SRS resources cannot be used for simultaneous transmission.

[0275] In some embodiments, the circuitry may be further configured to determine the SRS resource indicator by determining a bit width of the SRS resource indicator based on a maximum number of layers supported for uplink transmission and half the number of SRS resources in the first set of SRS resources.

[0276] In some embodiments, the circuitry may be further configured to transmit an indication that the uplink transmission is an SDM repetition.

[0277] In some embodiments, the circuitry may be further configured to receive at least one of a first set of capability values of a terminal device associated with a first set of antenna ports, a second set of capability values of a terminal device associated with a second set of antenna ports, or a third set of capability values of a terminal device associated with the first and second sets of antenna ports.

[0278] In some embodiments, the first set of antenna ports corresponds to a first panel, the second set of antenna ports corresponds to a second panel, and the uplink transmission is an NCB-based PUSCH and is performed over multiple TRPs.

[0279] In some embodiments, the network device includes circuitry configured to perform at least one of: determining a default capability value set for the terminal device associated with a BWP configured for the terminal device; and performing an initial transmission with the terminal device by applying the default capability value set; or, pursuant to a determination that a fallback condition is satisfied, performing an uplink transmission by applying the default capability value set.

[0280] As used herein, the term "circuit" may refer to a hardware circuit and / or a combination of a hardware circuit and software. For example, a circuit may be a combination of analog and / or digital hardware circuitry with software / firmware. As a further example, a circuit may be any portion of a hardware processor with software, such as a digital signal processor, software, and memory that cooperate to perform various functions in a device, such as a terminal device or network device. In yet another example, a circuit may be a hardware circuit and / or processor, such as a microprocessor or portion of a microprocessor, that requires software / firmware for operation but may be absent when not required for operation. As used herein, the term circuit also encompasses a simple hardware circuit or processor, or portion of a hardware circuit or processor, and its (or their) accompanying software and / or firmware implementation.

[0281] Generally, various embodiments of the present disclosure may be implemented by hardware or special purpose circuits, software, logic, or any combination thereof. Some aspects may be implemented by hardware, while other aspects may be implemented by firmware or software that may be executed by a controller, microprocessor, or other computing device. Various aspects of the embodiments of the present disclosure have been shown and described as block diagrams, flowcharts, or illustrated by some other pictorial representation, and it will be understood that the blocks, apparatus, systems, techniques, or methods described herein may be implemented by, for example, but not limited to, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing device, or combinations thereof.

[0282] The present disclosure further provides at least one computer program product tangibly stored on a computer-readable, non-transitory storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules. The instructions execute on a target real or virtual processor device to perform, for example, the processes or methods described above with reference to FIGS. 1A-13. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various embodiments, the functionality of the program modules may be combined or split between program modules as desired. The machine-readable instructions of the program modules may be executed in local or distributed devices. In distributed devices, program modules may be located in both local and remote storage media.

[0283] Program code for carrying out the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, and when executed by the processor or controller, the functions / operations specified in the flowcharts and / or block diagrams are performed. The program code may run entirely on the machine, partially on the machine, as a separate software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0284] The above-described program code may be embodied on a machine-readable medium, which may be any tangible medium that contains or stores a program used by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0285] Although operations have been described in a particular order, it should not be understood that performing these operations in the particular order or sequence shown, or performing all of the operations shown, is required to achieve desired results. In some situations, multitasking and parallel processing may be advantageous. Similarly, while the above discussion includes several specific implementation details, these should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features that may be specific to particular embodiments. Some features that are described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination.

[0286] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure, as defined by the appended claims, is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A terminal device having a plurality of panels, means for receiving downlink control information (DCI) comprising a first sounding reference signal (SRS) resource indicator associated with a first SRS resource set and a second SRS resource indicator associated with a second SRS resource set; means for transmitting an uplink transmission based on the DCI to a network device; Equipped with When the uplink transmission is set to a first simultaneous multiple panel transmission method, a bit width of the first SRS resource indicator is determined based on a number of SRS resources in the first SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; a bit width of the second SRS resource indicator is determined based on a number of SRS resources in the second SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; the maximum number of layers for the first simultaneous multiple panel transmission scheme is for each panel of the plurality of panels; When the uplink transmission is set to a second simultaneous multiple panel transmission method, the bit width of the first SRS resource indicator is determined based on the number of the SRS resources in the first SRS resource set and a maximum number of layers for the second simultaneous multiple panel transmission scheme of the uplink transmission; the bit width of the second SRS resource indicator is determined based on the number of the SRS resources in the second SRS resource set and the maximum number of layers for the second simultaneous multiple-panel transmission scheme of the uplink transmission; the number of layers corresponding to the second SRS resource indicator is the same as the number of layers indicated by the first SRS resource indicator. Terminal device.

2. When the uplink transmission is configured to the first simultaneous multiple-panel transmission mode, the bit width of the first SRS resource indicator is determined by the following Equation (1): [Equation 1] In the equation (1), B1 represents the bit width of the first SRS resource indicator, [Equation 2] represents the number of SRS resources in the first SRS resource set, [Equation 3] is determined by the maximum number of layers in each panel of the uplink transmission; The terminal device according to claim 1 .

3. When the uplink transmission is configured to the first simultaneous multiple-panel transmission mode, the bit width of the second SRS resource indicator is determined by the following Equation (2): [Equation 4] In the equation (2), B2 represents the bit width of the second SRS resource indicator; [Equation 5] represents the number of SRS resources in the second SRS resource set; [Equation 6] is determined by the maximum number of layers for the first simultaneous multiple panel transmission scheme of the uplink transmission; The terminal device according to claim 1 .

4. the number of SRS resources in the first SRS resource set is equal to the number of SRS resources in the second SRS resource set; The terminal device according to claim 1 .

5. The uplink transmission is configured to the first simultaneous multiple panel transmission method or the second simultaneous multiple panel transmission method by a radio resource control (RRC) configuration. The terminal device according to claim 1 .

6. the SRS resource indicated by the first SRS resource indicator and the SRS resource indicated by the second SRS resource indicator correspond to different antenna ports; The terminal device according to claim 1 .

7. The first SRS resource set and the second SRS resource set are configured with application parameters set in a non-codebook. The terminal device according to claim 1 .

8. When the uplink transmission is set to the first simultaneous multiple panel transmission method, Layer Set {0 , v1-1} is associated with a first resource set corresponding to the first SRS resource indicator, and a layer set {v1, . . . , v1+v2-1} is associated with a second resource set corresponding to the second SRS resource indicator, where v1 is the number of layers indicated by the first SRS resource indicator and v2 is the number of layers indicated by the second SRS resource indicator. The terminal device according to claim 1 .

9. When the uplink transmission is set to the second simultaneous multiple panel transmission method, Layer Set {0 , . . . , v} is associated with a first resource set corresponding to the first SRS resource indicator, and layer set {0 , ..., v} is associated with a second resource set corresponding to the second SRS resource indicator, and v is the number of layers of the uplink transmission corresponding to the first SRS resource indicator and the second SRS resource indicator, respectively. The terminal device according to claim 1 .

10. A network device, means for transmitting downlink control information (DCI) comprising a first sounding reference signal (SRS) resource indicator associated with a first SRS resource set and a second SRS resource indicator associated with a second SRS resource set; means for receiving an uplink transmission based on the DCI from a terminal device having a plurality of panels; Equipped with When the uplink transmission is set to a first simultaneous multiple panel transmission method, a bit width of the first SRS resource indicator is determined based on a number of SRS resources in the first SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; a bit width of the second SRS resource indicator is determined based on a number of SRS resources in the second SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; the maximum number of layers for the first simultaneous multiple panel transmission scheme is for each panel of the plurality of panels; When the uplink transmission is set to a second simultaneous multiple panel transmission method, the bit width of the first SRS resource indicator is determined based on the number of the SRS resources in the first SRS resource set and a maximum number of layers for the second simultaneous multiple panel transmission scheme of the uplink transmission; the bit width of the second SRS resource indicator is determined based on the number of the SRS resources in the second SRS resource set and the maximum number of layers for the second simultaneous multiple-panel transmission scheme of the uplink transmission; the number of layers corresponding to the second SRS resource indicator is the same as the number of layers indicated by the first SRS resource indicator. Network equipment.

11. The first SRS resource set and the second SRS resource set are configured with application parameters set in a non-codebook. The network device of claim 10.

12. When the uplink transmission is set to the first simultaneous multiple panel transmission method, Layer Set {0 , v1-1} is associated with a first resource set corresponding to the first SRS resource indicator, and a layer set {v1, . . . , v1+v2-1} is associated with a second resource set corresponding to the second SRS resource indicator, where v1 is the number of layers indicated by the first SRS resource indicator and v2 is the number of layers indicated by the second SRS resource indicator. The network device of claim 10.

13. When the uplink transmission is set to the second simultaneous multiple panel transmission method, Layer Set {0 , . . . , v} is associated with a first resource set corresponding to the first SRS resource indicator, and layer set {0 , ..., v} is associated with a second resource set corresponding to the second SRS resource indicator, and v is the number of layers of the uplink transmission corresponding to the first SRS resource indicator and the second SRS resource indicator, respectively. The network device of claim 10.

14. 1. A method performed by a terminal device having a plurality of panels, comprising: receiving downlink control information (DCI) comprising a first sounding reference signal (SRS) resource indicator associated with a first SRS resource set and a second SRS resource indicator associated with a second SRS resource set; transmitting an uplink transmission based on the DCI to a network device; Including, When the uplink transmission is set to a first simultaneous multiple panel transmission method, a bit width of the first SRS resource indicator is determined based on a number of SRS resources in the first SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; a bit width of the second SRS resource indicator is determined based on a number of SRS resources in the second SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; the maximum number of layers for the first simultaneous multiple panel transmission scheme is for each panel of the plurality of panels; When the uplink transmission is set to a second simultaneous multiple panel transmission method, the bit width of the first SRS resource indicator is determined based on the number of the SRS resources in the first SRS resource set and a maximum number of layers for the second simultaneous multiple panel transmission scheme of the uplink transmission; the bit width of the second SRS resource indicator is determined based on the number of the SRS resources in the second SRS resource set and the maximum number of layers for the second simultaneous multiple-panel transmission scheme of the uplink transmission; the number of layers corresponding to the second SRS resource indicator is the same as the number of layers indicated by the first SRS resource indicator. method.

15. 1. A method performed by a network device, comprising: transmitting downlink control information (DCI) comprising a first sounding reference signal (SRS) resource indicator associated with a first SRS resource set and a second SRS resource indicator associated with a second SRS resource set; receiving an uplink transmission based on the DCI from a terminal device having a plurality of panels; Including, When the uplink transmission is set to a first simultaneous multiple panel transmission method, a bit width of the first SRS resource indicator is determined based on a number of SRS resources in the first SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; a bit width of the second SRS resource indicator is determined based on a number of SRS resources in the second SRS resource set and a maximum number of layers for the first simultaneous multiple-panel transmission scheme of the uplink transmission; the maximum number of layers for the first simultaneous multiple panel transmission scheme is for each panel of the plurality of panels; When the uplink transmission is set to a second simultaneous multiple panel transmission method, the bit width of the first SRS resource indicator is determined based on the number of the SRS resources in the first SRS resource set and a maximum number of layers for the second simultaneous multiple panel transmission scheme of the uplink transmission; the bit width of the second SRS resource indicator is determined based on the number of the SRS resources in the second SRS resource set and the maximum number of layers for the second simultaneous multiple-panel transmission scheme of the uplink transmission; the number of layers corresponding to the second SRS resource indicator is the same as the number of layers indicated by the first SRS resource indicator. method.

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