SRS enhancements supporting non-codebook-based uplink transmissions of more than 4 layers

Abstract

The invention relates to SRS enhancement supporting non-codebook-based uplink transmissions of more than four layers. In one aspect, a wireless device may include at least one antenna; at least one radio component, the at least one radio component being coupled to the at least one antenna; and a processor coupled to the at least one radio; wherein the processor is configured to: receive, via the at least one radio component, at least one radio resource control (RRC) signaling from a cellular base station, where the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for a non-codebook, Ngt; 4, and each SRS resource is configured with a port; and transmitting, via the at least one radio, SRS to the cellular base station on the configured set of SRS resources, wherein each SRS is transmitted on one SRS resource of the configured set of SRS resources.

Description

Technical Field

[0001] The present application as a whole relates to wireless communication systems, including wireless devices, cellular base stations, methods, and apparatuses for supporting sounding reference signal (SRS) enhancement for non-codebook based uplink transmission of more than 4 layers. Background Art

[0002] Wireless mobile communication technologies use various standards and protocols to send data between base stations and wireless communication devices. Wireless communication system standards and protocols may include, for example, the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) (e.g., 4G), 3GPP New Radio (NR) (e.g., 5G), and the IEEE 802.11 standard for wireless local area networks (WLANs) (often referred to by industry groups as WLANs). ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols may use various radio access networks (RANs) to communicate between base stations of the RAN (which may also be often sometimes referred to as RAN nodes, network nodes, or simply nodes) and wireless communication devices called user equipment (UE). 3GPP RANs may include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN may use one or more radio access technologies (RATs) for communication between base stations and UEs. For example, GERAN implements GSM and / or EDGE RAT, UTRAN implements Universal Mobile Telecommunications System (UMTS) RAT or other 3GPP RAT, E-UTRAN implements LTE RAT (sometimes referred to as LTE), and NG-RAN implements NR RAT (sometimes referred to as 5G RAT, 5G NR RAT, or simply NR in this document). In some deployments, E-UTRAN may also implement NR RAT. In some deployments, NG-RAN may also implement LTE RAT.

[0005] The base stations used by the RAN may correspond to the RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also often denoted as an evolved Node B, enhanced Node B, eNodeB, or eNB). An example of an NG-RAN base station is a Next Generation Node B (also sometimes referred to as a gNodeB or gNB).

[0006] The RAN provides its communication services together with external entities through its connection with the Core Network (CN). For example, E-UTRAN may utilize the Evolved Packet Core (EPC) while NG-RAN may utilize the 5G Core Network (5GC). Summary of the invention

[0007] Embodiments relate to apparatus, methods, devices, computer-readable storage media, and computer program products for wireless communications.

[0008] According to one aspect, a wireless device is provided, comprising: at least one antenna; at least one radio component, the at least one radio component coupled to the at least one antenna; and a processor, the processor coupled to the at least one radio component; wherein the processor is configured to: receive at least one radio resource control (RRC) signaling from a cellular base station via the at least one radio component, wherein the at least one RRC signaling configures at least one group of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with a port; and send SRS to the cellular base station via the at least one radio component on the configured group of SRS resources, wherein each SRS is sent on one SRS resource in the configured group of SRS resources.

[0009] According to another aspect, a cellular base station is provided, comprising: at least one antenna; at least one radio component, the at least one radio component coupled to the at least one antenna; and a processor, the processor coupled to the at least one radio component; wherein the processor is configured to: send at least one radio resource control (RRC) signaling to a wireless device via the at least one radio component, wherein the at least one RRC signaling configures at least one group of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with a port; and receive SRS from the wireless device on the configured group of SRS resources via the at least one radio component, wherein each SRS is received on one SRS resource in the configured group of SRS resources.

[0010] According to another aspect, a method for a wireless device is provided, the method comprising: receiving at least one radio resource control (RRC) signaling from a cellular base station, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with a port; and sending an SRS to the cellular base station on the configured set of SRS resources, wherein each SRS is sent on one SRS resource in the configured set of SRS resources.

[0011] According to another aspect, a method for a cellular base station is provided, the method comprising: sending at least one radio resource control (RRC) signaling to a wireless device, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with a port; and receiving an SRS from the wireless device on the configured set of SRS resources, wherein each SRS is received on one SRS resource in the configured set of SRS resources.

[0012] According to another aspect, an apparatus is provided, comprising: a processor configured to cause a wireless device to: receive at least one radio resource control (RRC) signaling from a cellular base station via the at least one radio component, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with a port; and send an SRS to the cellular base station via the at least one radio component on the configured set of SRS resources, wherein each SRS is sent on one SRS resource in the configured set of SRS resources.

[0013] According to another aspect, a computer-readable storage medium storing program instructions is provided, wherein the program instructions, when executed by a computer system, cause the computer system to perform the method according to any one of the above aspects.

[0014] According to another aspect, a computer program product is provided. The computer program product comprises program instructions. When the program instructions are executed by a computer, the computer is caused to perform the method according to any one of the above aspects.

[0015] The techniques described herein may be implemented in and / or used with a number of different types of devices, including, but not limited to, any of cellular telephones, tablet computers, wearable computing devices, portable media players, and a variety of other computing devices.

[0016] This disclosure is intended to provide a brief overview of some of the topics described in this document. Therefore, it should be understood that the above features are only examples and should not be construed as narrowing the scope or essence of the topics described herein in any way. Other features, aspects, and advantages of the topics described herein will become apparent through the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To easily identify the discussion of any particular element or action, the most significant digit(s) in a reference number refers to the drawing number that first introduces the element.

[0018] Figure 1 An example architecture of a wireless communication system according to embodiments disclosed herein is illustrated.

[0019] Figure 2 A system for performing signaling between a wireless device and a network device according to embodiments disclosed herein is illustrated.

[0020] Figure 3 A general flow chart according to the present disclosure is illustrated.

[0021] Figure 4A An example of an SRS resource configuration in which each SRS resource occupies a separate symbol is illustrated.

[0022] Figure 4B An example of a non-codebook SRS resource configuration in which two SRS resources occupy the same symbol is illustrated.

[0023] Figure 5 An example of non-codebook SRS resource configuration for aperiodic SRS transmission is illustrated.

[0024] Fig. 6A An example assignment of SRS resource sets and identifiers of SRS resources is illustrated.

[0025] Figure 6B An example of identifiers of SRS resources corresponding to a general order of identifiers based on an SRS resource set is illustrated.

[0026] Figure 7 An example of non-codebook SRS resource configuration for non-periodic SRS transmission in a scenario where two TRP operations are enabled is illustrated.

[0027] Fig. 8A An example of non-codebook SRS resource configuration that enables a UE to determine the mapping between SRI / QCL / spatial relationship and a specific SRS resource set is illustrated.

[0028] Figure 8B Another example of non-codebook SRS resource configuration that enables a UE to determine the mapping between SRI / QCL / spatial relationship and a specific SRS resource set is illustrated. DETAILED DESCRIPTION

[0029] Various embodiments are described with reference to UE. However, reference to UE is provided for illustrative purposes only. The example embodiments may be used with any electronic component that can establish a connection with a network and is configured with hardware, software and / or firmware for exchanging information and data with the network. Therefore, UE as described herein is used to represent any suitable electronic component.

[0030] Figure 1 An example architecture of a wireless communication system 100 according to embodiments disclosed herein is illustrated. The description provided below is for an example wireless communication system 100 operating in conjunction with the LTE system standard and / or the 5G or NR system standard provided in the 3GPP technical specifications.

[0031] like Figure 1 As shown, wireless communication system 100 includes UE 102 and UE 104 (although any number of UEs may be used). In this example, UE 102 and UE 104 are illustrated as smartphones (e.g., handheld touch screen mobile computing devices capable of connecting to one or more cellular networks), but may also include any mobile or non-mobile computing device configured for wireless communication.

[0032] UE 102 and UE 104 may be configured to be communicatively coupled to RAN 106. In an embodiment, RAN 106 may be NG-RAN, E-UTRAN, etc. UE 102 and UE 104 utilize connections (or channels) (shown as connection 108 and connection 110, respectively) with RAN 106, where each connection (or channel) includes a physical communication interface. RAN 106 may include one or more base stations, such as base station 112 and base station 114, to implement connection 108 and connection 110.

[0033] In this example, connection 108 and connection 110 are air interfaces that enable such communicative coupling and may conform to the RAT used by RAN 106 , such as, for example, LTE and / or NR.

[0034] In some embodiments, UE 102 and UE 104 may also directly exchange communication data via side link interface 116. UE 104 is shown as being configured to access an access point (shown as AP 118) via connection 120. By way of example, connection 120 may include a local wireless connection, such as a connection conforming to any IEEE 802.11 protocol, wherein AP 118 may include In this example, AP 118 may be connected to another network (eg, the Internet) without going through CN 124.

[0035] In an embodiment, UE 102 and UE 104 may be configured to communicate with each other or with base station 112 and / or base station 114 over a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals according to various communication techniques, such as but not limited to orthogonal frequency division multiple access (OFDMA) communication techniques (e.g., for downlink communication) or single carrier frequency division multiple access (SC-FDMA) communication techniques (e.g., for uplink and ProSe or sidelink communication), although the scope of the embodiment is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0036] In some embodiments, all or part of base station 112 or base station 114 may be implemented as one or more software entities running on a server computer as part of a virtual network. In addition, or in other embodiments, base station 112 or base station 114 may be configured to communicate with each other via interface 122. In an embodiment where wireless communication system 100 is an LTE system (e.g., when CN124 is EPC), interface 122 may be an X2 interface. The X2 interface may be defined between two or more base stations (e.g., two or more eNBs, etc.) connected to EPC and / or between two eNBs connected to EPC. In an embodiment where wireless communication system 100 is an NR system (e.g., when CN 124 is 5GC), interface 122 may be an Xn interface. The Xn interface is defined between two or more base stations (e.g., two or more gNBs, etc.) connected to 5GC, between base station 112 (e.g., gNB) and eNB connected to 5GC, and / or between two eNBs connected to 5GC (e.g., CN 124).

[0037] The RAN 106 is shown as being communicatively coupled to the CN 124. The CN 124 may include one or more network elements 126 configured to provide various data and telecommunication services to customers / subscribers (e.g., UE 102 and users of UE 104) connected to the CN 124 via the RAN 106. The components of the CN 124 may be implemented in one physical device or separate physical devices including components for reading and executing instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium).

[0038] In an embodiment, CN 124 may be an EPC, and RAN 106 may be connected to CN 124 via an S1 interface 128. In an embodiment, S1 interface 128 may be divided into two parts: an S1 user plane (S1-U) interface that carries traffic data between base station 112 or base station 114 and a serving gateway (S-GW); and an S1-MME interface that is a signaling interface between base station 112 or base station 114 and a mobility management entity (MME).

[0039] In an embodiment, CN 124 may be a 5GC, and RAN 106 may be connected to CN 124 via an NG interface 128. In an embodiment, NG interface 128 may be divided into two parts: an NG user plane (NG-U) interface that carries service data between base station 112 or base station 114 and a user plane function (UPF); and an S1 control plane (NG-C) interface that is a signaling interface between base station 112 or base station 114 and an access and mobility management function (AMF).

[0040] Generally speaking, application server 130 may be an element that provides applications (e.g., packet-switched data services) that use Internet Protocol (IP) bearer resources with CN 124. Application server 130 may also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for UE 102 and UE 104 via CN 124. Application server 130 may communicate with CN 124 via IP communication interface 132.

[0041] Figure 2 A system 200 for performing signaling 234 between a wireless device 202 and a network device 218 according to embodiments disclosed herein is illustrated. The system 200 may be part of a wireless communication system as described herein. The wireless device 202 may be, for example, a UE of a wireless communication system. The network device 218 may be, for example, a base station (e.g., an eNB or a gNB) of a wireless communication system.

[0042] The wireless device 202 may include one or more processors 204. The processor 204 may execute instructions to perform various operations of the wireless device 202, as described herein. The processor 204 may include one or more baseband processors implemented using, for example, a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0043] The wireless device 202 may include a memory 206. The memory 206 may be a non-transitory computer-readable storage medium that stores instructions 208 (which may include, for example, instructions executed by the processor 204). The instructions 208 may also be referred to as program code or a computer program. The memory 206 may also store data used by the processor 204 and results calculated by the processor.

[0044] The wireless device 202 may include one or more transceivers 210 that may use radio frequency (RF) transmitter and / or receiver circuitry that uses an antenna 212 of the wireless device 202 to facilitate signaling (e.g., signaling 234) to and / or from the wireless device 202 with other devices (e.g., network device 218) according to a corresponding RAT.

[0045] The wireless device 202 may include one or more antennas 212 (e.g., one, two, four, or more). For embodiments with multiple antennas 212, the wireless device 202 may utilize the spatial diversity of such multiple antennas 212 to transmit and / or receive multiple different data streams on the same time-frequency resource. This behavior may be referred to as, for example, multiple-input multiple-output (MIMO) behavior (referring to the multiple antennas used at each of the transmitting device and the receiving device to implement this aspect). MIMO transmission by the wireless device 202 may be implemented based on precoding (or digital beamforming) applied at the wireless device 202, which multiplexes the data streams across the antennas 212 based on known or assumed channel characteristics, so that each data stream is received at an appropriate signal strength relative to the other streams and at a desired location in the spatial domain (e.g., the location of the receiver associated with the data stream). Certain embodiments may use a single-user MIMO (SU-MIMO) approach (where the data streams are all directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) approach (where separate data streams may be directed to separate (different) receivers in different locations in the spatial domain).

[0046] In certain embodiments with multiple antennas, the wireless device 202 may implement analog beamforming techniques whereby the phases of signals transmitted by the antennas 212 are relatively adjusted so that the (joint) transmissions of the antennas 212 can be directed (this is sometimes referred to as beam steering).

[0047] The wireless device 202 may include one or more interfaces 214. The interfaces 214 may be used to provide input to the wireless device 202 or output from the wireless device. For example, a wireless device 202 that is a UE may include an interface 214, such as a microphone, a speaker, a touch screen, buttons, etc., to allow a user of the UE to input and / or output to the UE. Other interfaces of such a UE may be composed of transmitters, receivers, and other circuit systems that allow communication between the UE and other devices (e.g., in addition to the transceiver 210 / antenna 212 described above), and may be based on known protocols (e.g., etc.) to perform the operation.

[0048] The network device 218 may include one or more processors 220. The processor 220 may execute instructions to perform various operations of the network device 218, as described herein. The processor 204 may include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0049] The network device 218 may include a memory 222. The memory 222 may be a non-transitory computer-readable storage medium that stores instructions 224 (which may include, for example, instructions executed by the processor 220). The instructions 224 may also be referred to as program code or a computer program. The memory 222 may also store data used by the processor 220 and results calculated by the processor.

[0050] The network device 218 may include one or more transceivers 226, which may include RF transmitter and / or receiver circuitry that uses an antenna 228 of the network device 218 to facilitate signaling (e.g., signaling 234) to and / or from the network device 218 with other devices (e.g., wireless device 202) according to a corresponding RAT.

[0051] The network device 218 may include one or more antennas 228 (eg, one, two, four, or more). In embodiments with multiple antennas 228, the network device 218 may perform MIMO, digital beamforming, analog beamforming, beamsteering, etc. as described.

[0052] The network device 218 may include one or more interfaces 230. The interface 230 may be used to provide input to or output from the network device 218. For example, the network device 218 as a base station may include an interface 230 composed of a transmitter, a receiver, and other circuit systems (e.g., in addition to the transceiver 226 / antenna 228 described above), which enables the base station to communicate with other equipment in the core network and / or enables the base station to communicate with an external network, computer, database, etc., in order to achieve the purpose of performing operations, management, and maintenance of the base station or other equipment operably connected to the base station.

[0053] The following description will take 5G NR as an example to illustrate the concepts of the present disclosure, but it should be understood that the solutions of the present disclosure are applicable to any appropriate mobile communication technology (for example, 6G or any applicable advanced mobile communication technology).

[0054] In the following description, gNB is sometimes used to represent a control device at the base station side in a wireless communication network. It should be understood that this is for illustrative purposes only and is not restrictive. Base stations based on any appropriate mobile communication technology are applicable.

[0055] In 5G NR, there are roughly three different types of uplink (UL) transmission schemes: unconfigured, codebook-based, and non-codebook-based. In the context of the present disclosure, a codebook may refer to a precoder set (i.e., a precoding matrix set). The present disclosure mainly relates to non-codebook-based UL transmission. In the following, for simplicity, unless otherwise explicitly defined, UL transmission refers to non-codebook-based UL transmission. In non-codebook-based transmission, the UE will estimate the UL channel based on the received channel state information reference signal (CSI-RS) based on the assumption of channel reciprocity, and determine the precoding information for uplink transmission on the UE side (e.g., create a precoding matrix). In other words, under non-codebook-based transmission, the UE will calculate the precoder for uplink transmission based on the CSI-RS received on the UE side.

[0056] As wireless devices develop, the capabilities of wireless devices in uplink transmission are improving. For example, as the computing and communication capabilities of wireless devices develop, UE will support sending more data streams to a base station at the same time, where each data stream is precoded using a corresponding precoder, especially for non-codebook based uplink transmission. The number of data streams sent simultaneously may correspond to the number of layers.

[0057] Although current communication mechanisms support non-codebook based uplink transmission of multiple layers, the number of supported layers is too small to meet the requirements for increased uplink data rates.

[0058] Therefore, there is a need to provide a solution to support more layers (preferably more than 4 layers) for non-codebook based uplink transmission in order to increase the uplink data rate.

[0059] In general, to support non-codebook based uplink transmission of multiple layers, the UE will first send multiple SRSs to the gNB on multiple SRS resources configured by the gNB, where each SRS is sent on the corresponding SRS resource using a corresponding precoder. Upon receiving the SRS, the gNB will select at least one of the SRSs based on, for example, signal reception quality, and indicate the selected SRS (i.e., the corresponding SRS resource) by sending downlink control information (DCI) to the UE, so as to instruct the UE to use the same precoder for uplink data as the precoder used to send the selected SRS. After being instructed by the gNB, the UE may simultaneously send uplink data using the selected precoders, respectively.

[0060] Therefore, in order to support more layers (preferably more than 4 layers) for non-codebook based uplink transmission, the gNB needs to configure more than 4 SRS resources for non-codebook for sending SRS. For simplicity, unless otherwise explicitly defined, the SRS resources described in this document refer to SRS resources for non-codebook.

[0061] Figure 3 is a general flow chart according to the present disclosure.

[0062] like Figure 3 As illustrated, according to the present disclosure, a base station (hereinafter referred to as BS) may provide at least one RRC signaling to a wireless device (hereinafter referred to as UE). The at least one RRC signaling may configure at least one group of SRS resources for non-codebook, each group including N SRS resources, N>4 and an integer, and each SRS resource is configured with one port (e.g., one channel in terms of a combination of time resources, frequency resources, and orthogonal codes).

[0063] As is known in the art, SRS may be transmitted periodically, aperiodically (i.e., triggered by DCI), or semi-persistently (i.e., periodically during an activity window). In practice, for example, the BS may configure three groups of SRS resources for non-codebook transmission for periodic SRS transmission, semi-persistent SRS transmission, and aperiodic SRS transmission, respectively. For example, each group may include the same number of SRS resources, such as more than four SRS transmission resources. Alternatively, each group does not necessarily include the same number of SRS resources. For example, any one of the multiple groups of SRS resources configured for periodic / semi-persistent / aperiodic SRS transmission may include more than four SRS resources, while any one of the remaining groups of SRS resources may include less than four SRS resources.

[0064] According to the present disclosure, a UE may send an SRS to a base station on a configured set of SRS resources, wherein each SRS is sent on one SRS in the configured set of SRS resources. The UE may simultaneously send the SRS on all SRS resources configured in a group using different precoders for each SRS, so that a relatively large number of SRSs may be detected on the BS side, which enables the BS to select more precoders for the UE to simultaneously send uplink data streams. For example, Figure 4A and Figure 4B As shown (note that for simplicity, Figure 4A and Figure 4B The SRS 1 to 8 shown actually refer to SRS resources 1 to 8), and a group of 8 SRS resources can be configured. In this case, the UE can send 8 SRSs on all 8 SRS resources configured in the group using different precoders for each SRS. Therefore, the BS can select up to 8 SRSs. In turn, the UE can send up to 8 data streams simultaneously. In other words, non-codebook-based UL transmission of up to 8 layers can be supported.

[0065] According to the present disclosure, the number of SRS resources included in a group may be determined based on the capability of the UE. For example, the number of SRS resources included in a group may correspond to the maximum number of layers supported by the UE, that is, the maximum number supported for simultaneous UL data stream transmission. The UE may provide the BS with its capability ( Figure 3 not shown).

[0066] The detailed features of the present disclosure will be described in detail below.

[0067] According to the implementation scheme, the UE may be configured to simultaneously send multiple SRSs in the same symbol. For a UE with such a feature, the BS may configure N SRS resources in a group so that at least two of the N SRS resources occupy the same symbol. This configuration will advantageously reduce latency.

[0068] For example, the UE may let the BS know whether it supports simultaneous transmission of multiple SRS for non-codebook in the same symbol and / or the maximum number of simultaneous SRS transmissions in one symbol supported. For example, the UE may send capability information to the BS, indicating whether the UE supports simultaneous transmission of multiple SRS for non-codebook in the same symbol, and if the UE does support such a feature, indicating the maximum number of simultaneous SRS transmissions in one symbol supported. Alternatively, the UE may only send capability information indicating the maximum number of simultaneous SRS transmissions in one symbol supported, without explicitly indicating whether the UE supports simultaneous SRS transmission. In this case, if the maximum number is equal to one, the capability information implies that the UE does not support simultaneous SRS transmission, and if the maximum number is greater than one, the capability information implies that the UE supports simultaneous SRS transmission.

[0069] According to the present disclosure, the BS may determine how many SRS resources can occupy the same symbol based on the UE capability. For example, the BS may configure N SRS resources in a group so that each K (K <= N and is an integer) of the N SRS resources occupy the same symbol, where K is equal to the maximum number of SRSs supported by the UE for simultaneous transmission. It should be noted that in the case where the UE supports simultaneous SRS transmission, the BS does not have to configure more than one SRS resource for the same symbol, for example, in a scenario where the requirements on latency are not strict. For another example, in the case where the UE supports simultaneous transmission of K SRSs in one symbol, the BS may configure N SRS resources in a group, in which each of L (an integer) sets of K SRS resources occupies the same symbol, and the remaining SRS resources (i.e., (NL×K) SRS resources) each occupy a symbol.

[0070] Figure 4A A set of SRS resources is illustrated in which each SRS resource occupies a separate symbol. Figure 4B A group of SRS resources is illustrated in which every two SRS resources occupy the same symbol. Figure 4B In the example, SRS resource 1 and SRS resource 2 occupy the same symbol, SRS resource 3 and SRS resource 4 occupy the same symbol, SRS resource 5 and SRS resource 6 occupy the same symbol, and SRS resource 7 and SRS resource 8 occupy the same symbol. Figure 4A and Figure 4B It can be understood that if some of the SRS resources occupy the same symbol, the total time used for SRS transmission can be reduced.

[0071] According to an embodiment, the N SRS resources in a group may be configured so that at least two of the N SRS resources occupy the same physical resource block (PRB). This configuration will advantageously reduce the occupation of frequency resources. Preferably, the N SRS resources in a group may be configured so that at least two SRS resources occupy the same symbol and the same PRB. In other words, at least two SRS resources may be configured with corresponding ports that share the same time resource and the same frequency resource but have different orthogonal codes.

[0072] Some aspects of the present disclosure have been described above. It should be noted that the aspects explained in detail above are applicable to any of periodic / semi-persistent / aperiodic SRS transmission.

[0073] According to the present disclosure, the set of N SRS resources can be configured by configuring one or more SRS resource sets, and each SRS resource set can be composed of multiple SRS resources. Based on relevant standards (e.g., 3GPP standards), only some symbols (e.g., the last four symbols) in a time slot can be used for SRS resources. As described above, SRS can be sent periodically, aperiodically, or semi-persistently. For periodic and semi-persistent SRS transmission, it is allowed to configure an SRS resource set across several time slots (e.g., using available symbols in each time slot). Therefore, according to the present disclosure, the BS can configure an SRS resource set containing a set of N (N>4) SRS resources for periodic or semi-persistent SRS transmission to support non-codebook-based UL transmission of more than 4 layers.

[0074] For non-periodic SRS transmission, based on relevant standards (e.g., 3GPP standards), one SRS resource set must be configured in the same time slot. Therefore, one SRS resource set may not be able to contain the required number of SRS resources. In view of this, the present disclosure assumes that multiple SRS resource sets for non-periodic SRS transmission that together contain N (N>4) SRS resources can be configured together as a group of N SRS resources to support non-codebook-based UL transmission of more than 4 layers. It should be noted that although for periodic or semi-persistent SRS transmission, the group of N SRS resources can be configured in one SRS set, the group of N SRS resources can alternatively be configured in multiple SRS resource sets. In the latter case, the aspects described below for non-periodic SRS transmission also apply to periodic or semi-persistent SRS transmission.

[0075] As described above, the number of SRS resource sets may depend on the number of available symbols in a time slot, the number of SRS repetitions, and the number of simultaneous SRS transmissions in a symbol. For example, for non-periodic SRS transmission, assuming the following: (1) the BS configures SRS resources to support 8 layers of non-codebook-based UL transmission; (2) only the last four symbols in a time slot are available for SRS resources; (3) SRS is transmitted without repetition; and (4) the UE does not support simultaneous SRS transmission in a symbol, two SRS resource sets each including four SRS resources may be configured. Figure 5 The SRS resource configuration under the above assumptions is illustrated. Figure 5 In FIG. 1 , SRS resources 1 to 8 are represented as SRS1 to 8. For example, Figure 5 As shown, SRS resources 1 to 4 may be configured in the first SRS resource set in time slot n, and SRS resources 5 to 8 may be configured in the second SRS resource set in time slot n+1. SRS resources 1 to 8 together constitute the set of SRSs for aperiodic SRS transmission.

[0076] According to the present disclosure, N (N>4) SRS resources may be uniformly configured in more than one SRS resource set for aperiodic SRS transmission. In other words, each SRS resource set in the SRS resource set for aperiodic SRS transmission is configured with the same number of SRS resources. Figure 5 This configuration advantageously simplifies the specific implementation on the UE side.

[0077] Alternatively and preferably, N (N>4) SRS resources may be configured in any combination in more than one SRS resource set for non-periodic SRS transmission. In other words, any suitable number of SRS resource sets, each containing any suitable number of SRS resources, may be configured, as long as the total number of SRS resources is N. This configuration will bring greater flexibility, especially because the available symbols for SRS resources may vary from time slot to time slot. For example, assuming that the BS configures SRS resources to support 8 layers of non-codebook-based UL transmission, and only three symbols are available for SRS resources in time slot n, and five symbols are available for SRS resources in time slot n+1, the BS may configure a first SRS resource set with three SRS resources, and may configure a second SRS resource set with five SRS resources.

[0078] According to the present disclosure, for aperiodic SRS transmission, if more than one SRS resource set is configured as a group of N (N>4) SRS resources, some restrictions may need to be ensured.

[0079] For example, as described above, the UE will calculate the precoder for the SRS based on the CSI-RS. The BS can only compare the channel quality of the received SRS when the calculation is performed based on the same downlink channel (e.g., a channel associated with a specific non-zero power (NZP) CSI-RS resource). In at least one RRC signaling indicating the SRS resource configuration, the SRS resource set to be configured will be associated with the corresponding NZP-CSI-RS resource. In the case where more than one SRS resource set is configured as a set of N (N>4) SRS resources for non-periodic SRS transmission, in order to keep calculating the precoder corresponding to the configured SRS resource based on the same downlink channel, more than one SRS resource set may need to be associated with the same NZP CSI-RS resource.

[0080] As another example, in order to keep the BS comparing the channel quality of the received SRS on the same power control basis, it may be necessary to configure the same power control parameters for more than one SRS resource set as a group of N (N>4) SRS resources for non-periodic transmission. For example, the power control parameters may include at least one or more of the following: α (i.e., target received power energy on the base station side), p0 (i.e., ratio of partial path loss compensation), pathlossReferenceRS (i.e., reference signal for path loss estimation), and srs-PowerControlAdjustmentStates (i.e., power control adjustment state for SRS transmission).

[0081] As another example, in the RRC signaling for SRS resource configuration, each SRS resource set used for aperiodic transmission will be associated with at least one trigger state (e.g., via parameter aperiodicSRS-REsourceTrigger, or in the case where several trigger states can be associated with aperiodic SRS resource sets, via parameter aperiodicSRS-ResourceTriggerList). For aperiodic SRS transmission, the SRS transmission will be triggered by a DCI containing a field indicating the trigger state (e.g., SRS request), so that the SRS resource set with the indicated trigger state will be triggered, in other words, the SRS transmission on the SRS resources in the SRS resource set with the indicated trigger state will be triggered. In the case where more than one SRS resource set is configured as a group of N (N>4) SRS resources for aperiodic SRS transmission, in order to ensure that all more than one SRS resource sets will be triggered together as a group, it may be necessary to configure more than one SRS resource set with the same SRS trigger state. That is, whenever aperiodic SRS transmission needs to be triggered, either all or none of the SRS resource sets are triggered. Specifically, for example, more than one SRS resource set may need to be configured with the same value of the parameter aperiodicSRS-ResourceTrigger or the same value of the parameter AperiodicSRS-ResourceTriggerList.

[0082] The UE will send an SRS precoded using the corresponding precoder. As described above, in non-codebook based transmission, the UE will calculate the precoder for uplink transmission based on the CSI-RS received on the UE side. Therefore, a timeline relaxation is required between the non-periodic SRS transmission and the reception of the CSI-RS on the associated NZP-CSI-RS resource to ensure a time period that is at least sufficient for the UE to calculate the precoder. According to the present disclosure, such timeline relaxation may be defined by a gap from the last symbol received of the NZP-CSI-RS resource associated with the set of N SRS resources configured for non-periodic SRS transmission to the first symbol of the non-periodic SRS transmission. For example, the unit of such a gap may be a symbol. For example, if the gap is less than M (an integer) orthogonal frequency division multiplexing (OFDM) symbols, the UE may not update the SRS precoding information (e.g., the previously calculated precoder).

[0083] In order to support non-codebook-based UL transmission of more than 4 layers, more than 4 SRS resources can be configured as a group. In view of this, compared with solutions that support fewer layers, SRS will be sent on more SRS resources, and the UE needs a longer time period to calculate the corresponding precoder for non-periodic SRS transmission. Therefore, the number M of OFDM symbols in the gap can take a relatively large value. For example, M may be greater than 42, that is, M>42, that is, the gap may contain more than 42 symbols. It should be noted that the time length of the symbol varies according to the subcarrier spacing (SCS) in 5G NR. The smaller the SCS, the longer the symbol occupies. Since in 5GNR, the downlink and uplink can take different SCS values, the time length of the symbol can be calculated based on the minimum SCS, so that the timeline between the non-periodic SRS transmission and the reception of the CSI-RS on the associated NZP-CSI-RS resource can be relaxed and calculated to a larger value to ensure that the UE has enough time to calculate the precoder. For example, the time length of a symbol (and the time length of M OFDM symbols) may be based on the minimum of the SCS of the NZP-CSI-RS and the SCS of the SRS to be aperiodically transmitted.

[0084] According to the present disclosure, the number M of OFDM symbols in the gap from the last symbol received of the NZP-CSI-RS resource associated with the set of N SRS resources configured for aperiodic SRS transmission to the first symbol of aperiodic SRS transmission can be reported from the UE to the BS as part of the UE capability. This can bring some flexibility, and the most appropriate value of M can be determined based on the capabilities of each specific UE (e.g., capabilities regarding calculations). Alternatively, the number M of OFDM symbols can also be defined as a fixed value in advance. For example, the value of M can be hard-coded in the specifications of the relevant standard.

[0085] When configuring SRS resources, each SRS resource set will be assigned an identifier (eg, ID), and each SRS resource will be assigned an identifier (eg, ID) within each SRS resource set. In other words, SRS resources belonging to different SRS resource sets are ordered separately and can share the same identifier. Fig. 6A The assignment of SRS resource sets and SRS resource identifiers is illustrated. Fig. 6A As shown, for two SRS resource sets, i.e., an SRS resource set with ID 0 and an SRS resource set with ID 1, even if the two sets are configured as a group for aperiodic SRS transmission, the SRS resources in each set are assigned corresponding IDs based on separate sorting. For example, the SRS resources in the SRS resource set with ID 0 are assigned IDs 0, 1, 2, and 3, respectively, and the SRS resources in the SRS resource set with ID 1 are also assigned IDs 0, 1, 2, and 3, respectively.

[0086] As described above, when receiving an SRS transmitted on a configured set of SRS resources, the BS will transmit a DCI including a field indicating an ID of the selected SRS (e.g., an SRS indicator (SRI)) to the UE, so as to instruct the UE to use precoding information corresponding to the indicated SRS for uplink data (e.g., the same precoder as the precoder used to transmit the indicated SRS). According to the present disclosure, since there may be more than one SRS resource set configured as a set of SRS resources for non-periodic SRS transmission, it is necessary to make the UE understand which SRS resource in which SRS resource set the indicated ID corresponds to.

[0087] According to the present disclosure, N SRS resources configured as a group in more than one SRS resource set may be sorted according to the identifier of the SRS resource set. For example, SRS resources within an SRS resource set with a smaller ID may have a smaller order, and SRS resources within an SRS resource set with a larger ID may have a larger order. For example, SRS resources within an SRS resource set with a smaller ID may have a larger order, and SRS resources within an SRS resource set with a larger ID may have a smaller order. In the DCI, instead of indicating an initial identifier of each SRS resource assigned in at least one RRC signaling for configuring the SRS resource, an identifier corresponding to a general order may be indicated. As Figure 6B As shown, for example, in the SRI field of the DCI, identifiers for SRS resources 0 to 3 in the SRS resource set 0 may be 0 to 3, and identifiers for SRS resources 0 to 3 in the SRS resource set 1 may be 4 to 7. For example, if the BS selects SRS resource 0 in the SRS resource set 0 and SRS resource 1 and SRS resource 3 in the SRS resource set 1, the BS may indicate identifiers 0, 5, and 7 in the SRI field of the DCI in order to instruct the UE to transmit uplink data using precoding information corresponding to the indicated SRS.

[0088] There are scenarios where communication between a wireless device and more than one transmit and receive point (TRP) of a BS is implemented. For example, multiple TRPs of a BS may perform joint transmission. Under such multi-TRP operation, some specific configurations may be required to support non-codebook based UL transmission for more than 4 layers. Note that the above features also apply to multi-TRP operation.

[0089] According to the present disclosure, assuming that the UE supports at most N layers for non-codebook based uplink transmission, for each TRP, the BS may configure a set of at most N SRS resources for non-codebook, and the total number of SRS resources configured for all TRPs of the BS is no greater than N. For example, the BS may decide how many SRS resources to configure for each TRP, for example, based on the average communication quality between the UE and the corresponding TRP and the capabilities of the TRP, as long as the total number of all SRS resources configured for all TRPs of the BS is equal to or less than the number of layers supported by the UE.

[0090] Specifically, as described above, configuring a set of SRS resources for non-periodic SRS transmission (or in some cases, for periodic / semi-persistent SRS transmission) may require multiple SRS resource sets. Still assuming that the UE supports up to N layers for non-codebook based uplink transmission, for each TRP, the BS may configure a set of up to N SRS resources for non-codebook in at least one SRS resource set for non-periodic SRS transmission, and the total number of SRS resources configured for all TRPs of the BS is no greater than N.

[0091] Figure 7 An example of SRS resource configuration for aperiodic SRS transmission for non-codebook based UL transmission is illustrated.

[0092] exist Figure 7 In the example of , it is assumed that the UE supports up to 16 layers for non-codebook based uplink transmission, and the scenario implements communication between two TRPs of the UE and the BS. In the illustrated example, the BS configures 8 SRS resources for each TRP, and configures each group of 8 SRS resources in two SRS resource sets for the corresponding TRP. Specifically, the SRS resource sets with ID 0 and ID 1 are configured for the first TRP, and the SRS resource sets with ID 2 and ID 3 are configured for the second TRP. After detecting the uplink channel, the BS can use two separate SRSs in two separate DCIs (e.g., Figure 7 The first SRI and the second SRI in the SRS resource set are used to indicate to the UE the precoder to be used for uplink data transmission. Similar to the above description, SRS resources configured as a group in more than one SRS resource set for each TRP can be sorted according to the identifier of the SRS resource set, and the identifier corresponding to the general order can be indicated in the corresponding SRI for each TRP.

[0093] Note that although Figure 7 The example shows that SRS resources are uniformly configured for each TRP, but the number of SRS resources used for each TRP can be arbitrarily configured according to actual conditions. Figure 7Under the same assumptions (i.e., 2TRP operation and 16 layers), the first TRP may be configured with 10 SRS resources and the second TRP may be configured with 6 SRS resources. For example, the number of SRS resources configured for each TRP may be determined based on multiple factors (e.g., the capabilities of the TRP, the average communication quality between the TRP and the UE, etc.).

[0094] like Figure 7 As illustrated, in the SRI, only an identifier corresponding to the general order of SRS resources for the corresponding TRP is indicated, without explicitly indicating which group of SRS resources (i.e., the SRS resource set configured as the group for the TRP) the indicated SRS resource belongs to. Therefore, the UE needs to be able to know the mapping between the SRI and the corresponding SRS resource group (i.e., the corresponding SRS resource set for non-periodic SRS transmission constituting the group) so as to be able to know which SRS resource indicated in the SRI refers to, for example Figure 7 Similarly, the UE also needs to be able to know the mapping between the quasi co-location (QCL) / spatial relationship and the corresponding SRS resource group (ie, the corresponding SRS resource set constituting the group).

[0095] There may be several ways to make the UE aware of this mapping.

[0096] For example, the group of SRS resource sets configured for the TRP may be associated with the same SRS trigger state, and different groups of SRS resource sets configured for different TRPs may be associated with different SRS trigger states, so that the mapping between the SRI / QCL / spatial relationship and a corresponding group of SRS resource sets may be determined based on the SRS trigger state. Specifically, take the mapping between SRI and a corresponding group of SRS resource sets as an example. Since the UE knows the mapping between the DCI and the TRP, the UE is able to know the mapping between the SRI contained in the DCI and the TRP. Therefore, when receiving the SRI, the UE can understand which SRS resource sets are associated with the corresponding TRP based on the value of the SRS trigger state.

[0097] like Fig. 8A As illustrated, SRS resource sets with ID 1 and ID 2 for aperiodic (AP) SRS transmission are configured for TRP 1, and AP SRS resource sets with ID 3 and ID 4 are configured for TRP 2. An SRS triggering state with a value of 1 is associated with AP SRS resource set 1 and AP SRS resource set 2, while an SRS triggering state with a value of 2 is associated with AP SRS resource set 3 and AP SRS resource set 4.

[0098] Under this solution, the BS needs to send several DCIs, each with a different SRS triggering state corresponding to a TPR, in order to trigger SRS transmission towards these TRPs.

[0099] As another example, different groups of SRS resource sets configured for different TRPs may be associated with the same SRS triggering state, and the mapping between the SRI / QCL / spatial relationship and a corresponding group of SRS resource sets may be determined based on a predetermined rule. For example, for two TRPs, the predetermined rule may be that the first k sets with smaller IDs correspond to TRP 1, and the remaining l sets with larger IDs correspond to TRP 2. Specifically, take the mapping between SRI and a corresponding group of SRS resource sets as an example. Since the UE knows the mapping between DCI and TRP, the UE is able to know the mapping between SRI contained in the DCI and TRP. In addition, since the SRS resource set will be associated with the NZP-CSI-RS during the SRS resource configuration, and each NZP-CSI-RS is associated with a specific TRP. Therefore, when receiving the SRI, the UE can determine which SRS resource sets are associated with the corresponding TRP.

[0100] like Figure 8B As illustrated, SRS resource sets with ID 1 and ID 2 for aperiodic (AP) SRS transmission are configured for TRP 1, and AP SRS resource sets with ID 3 and ID 4 are configured for TRP 2, and an SRS triggering state with a value of 1 is associated with all AP SRS resource sets 1 to 4. In addition, the NZP-CSI-RS for AP SRS resource sets 1 to 2 and AP SRS resource sets 3 to 4 are different.

[0101] Under this solution, the BS can trigger SRS transmission toward multiple TRPs by sending only one DCI, which can reduce overhead compared to the solution of assigning different SRS triggering states to SRS resource sets for different TRPs.

[0102] Various aspects of the present disclosure have been described above. The present disclosure can be implemented in various embodiments.

[0103] Embodiments contemplated herein include an apparatus comprising means for performing one or more elements of the methods described above. The apparatus may be, for example, an apparatus of a UE (such as the wireless device 202 as a UE, as described herein).

[0104] Embodiments contemplated herein include one or more non-transitory computer-readable media that include instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of the method described above. The non-transitory computer-readable medium may be, for example, a memory of a UE (such as the memory 206 of the wireless device 202 as a UE, as described herein).

[0105] Embodiments contemplated herein include an apparatus including logic, modules, or circuitry for performing one or more elements of the method described above. The apparatus may be, for example, an apparatus of a UE (such as a wireless device 202 as a UE, as described herein).

[0106] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media, the one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of the method described above. The apparatus may be, for example, an apparatus of a UE (such as a wireless device 202 as a UE, as described herein).

[0107] Embodiments contemplated herein include a signal as described in or associated with one or more elements of a method as described above.

[0108] The embodiments contemplated herein include a computer program or computer program product including instructions, wherein execution of the program by a processor causes the processor to perform one or more elements of the method described above. The processor may be a processor of a UE (such as the processor 204 of the wireless device 202 as a UE, as described herein). These instructions may be located, for example, in a processor and / or on a memory of a UE (such as the memory 206 of the wireless device 202 as a UE, as described herein).

[0109] Embodiments contemplated herein include an apparatus comprising means for performing one or more elements of the methods described above. The apparatus may be, for example, an apparatus of a base station (such as network device 218 as a base station, as described herein).

[0110] Embodiments contemplated herein include one or more non-transitory computer-readable media that include instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of the method described above. The non-transitory computer-readable medium may be, for example, a memory of a base station (such as memory 222 of network device 218 as a base station, as described herein).

[0111] Embodiments contemplated herein include an apparatus including logic, modules, or circuitry for executing one or more elements of the method described above. The apparatus may be, for example, an apparatus of a base station (such as network device 218 as a base station, as described herein).

[0112] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media, the one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of the method described above. The apparatus may be, for example, an apparatus of a base station (such as network device 218 as a base station, as described herein).

[0113] Embodiments contemplated herein include a signal as described in or associated with one or more elements of a method as described above.

[0114] Embodiments contemplated herein include a computer program or computer program product including instructions, wherein execution of the program by a processing element causes the processing element to perform one or more elements of the method as described above. The processor may be a processor of a base station (such as processor 220 of network device 218 as a base station, as described herein). These instructions may be located, for example, in a processor and / or in a memory of a UE (such as memory 222 of network device 218 as a base station, as described herein).

[0115] For one or more embodiments, at least one of the components set forth in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes and / or methods as set forth herein. For example, a baseband processor as described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein. For another example, a circuit system associated with a UE, a base station, a network element, etc. as described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein.

[0116] Unless otherwise expressly stated, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form disclosed. In view of the above teachings, modifications and variations are possible, or can be obtained from the practice of various embodiments.

[0117] Embodiments and implementations of the systems and methods described herein may include various operations that may be embodied in machine executable instructions to be executed by a computer system. A computer system may include one or more general or special purpose computers (or other electronic devices). A computer system may include hardware components that include specific logic for performing operations; or may include a combination of hardware, software, and / or firmware.

[0118] It should be appreciated that the systems described herein include descriptions of specific embodiments. These embodiments may be combined into a single system, partially combined into other systems, separated into multiple systems, or otherwise divided or combined. In addition, it is contemplated that parameters, attributes, aspects, etc. of another embodiment may be used in one embodiment. For clarity, these parameters, attributes, aspects, etc. are described only in one or more embodiments, and it should be appreciated that these parameters, attributes, aspects, etc. may be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment unless expressly stated herein.

[0119] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

[0120] Although the foregoing has been described in considerable detail for the sake of clarity, it will be apparent that certain changes and modifications may be made without departing from the principles of the invention. It should be noted that there are many alternative ways of implementing both the processes and the apparatus described herein. Therefore, the embodiments of the present invention should be regarded as illustrative rather than restrictive, and the specification is not limited to the details given herein, but may be modified within the scope and equivalents of the appended claims.

[0121] The SRS enhancement supporting non-codebook based uplink transmission of more than 4 layers has been described in detail above. In addition, the present disclosure may also have any one of the following configurations.

[0122] (1) A wireless device, the wireless device comprising:

[0123] at least one antenna;

[0124] at least one radio coupled to the at least one antenna; and

[0125] a processor coupled to the at least one radio;

[0126] The processor is configured as follows:

[0127] receiving at least one radio resource control (RRC) signaling from a cellular base station via the at least one radio component, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook,

[0128] N>4, and each SRS resource is configured with a port; and transmitting the SRS to the cellular base station via the at least one radio component on a configured set of SRS resources, wherein each SRS is transmitted on one SRS resource in the configured set of SRS resources.

[0129] (2) The wireless device according to (1), wherein

[0130] The processor is further configured to send capability information to the cellular base station via the at least one radio component, the capability information indicating whether the wireless device supports simultaneous transmission of multiple SRSs for non-codebook in the same symbol and / or a maximum number of SRSs for non-codebook that are supported to be simultaneously transmitted in one symbol; and

[0131] In the case that the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

[0132] (3) The wireless device according to (1) or (2), wherein

[0133] At least two SRS resources among the N SRS resources occupy the same physical resource block (PRB).

[0134] (4) The wireless device according to (1) or (2), wherein

[0135] A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

[0136] (5) The wireless device according to (1) or (2), wherein

[0137] A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

[0138] (6) The wireless device according to (5), wherein

[0139] configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or

[0140] The N SRS resources are uniformly configured in the more than one SRS resource set used for aperiodic SRS transmission.

[0141] (7) The wireless device according to (5), wherein for the more than one SRS resource sets,

[0142] One or more of the following:

[0143] The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information.

[0144] associated with a CSI-RS resource;

[0145] The more than one SRS resource sets are configured with the same power control parameter; and

[0146] The more than one SRS resource sets are configured with the same SRS triggering state.

[0147] (8) The wireless device according to (5), wherein

[0148] The processor is further configured to receive, via the at least one radio component, downlink control information (DCI) from the cellular base station triggering aperiodic SRS transmission, and wherein

[0149] The processor is further configured to: if a gap from the last symbol received of the non-zero power (NZP) channel state information reference signal (CSI-RS) resource associated with the second group of N SRS resources to the first symbol sent by the aperiodic SRS is less than M orthogonal frequency division multiplexing (OFDM) symbols, then not update the SRS precoding information, where M>42, and the time length of the M symbols is based on the NZP-CSI-RS

[0150] It is calculated based on the minimum of the subcarrier spacing (SCS) of the SRS and the SCS of the SRS to be sent non-periodically.

[0151] (9) The wireless device according to (8), wherein

[0152] The processor is further configured to send capability information indicating a value of M to the cellular base station via the at least one radio component, or

[0153] This value of M is defined in advance as a fixed value.

[0154] (10) The wireless device according to (5), wherein

[0155] The N SRS resources configured in the more than one SRS resource sets are ordered according to an identifier of the SRS resource set.

[0156] (11) The wireless device according to (10), wherein the processor is further configured to:

[0157] receiving, via the at least one radio component, downlink control information (DCI) from the cellular base station, the downlink control information (DCI) indicating at least one SRS resource from the N SRS resources by indicating at least one identifier, the at least one identifier being based on an order corresponding to the at least one SRS resource, and

[0158] In response to the DCI, uplink data is transmitted via the at least one radio component using precoding information corresponding to the at least one SRS resource.

[0159] (12) The wireless device according to (1) or (2), wherein for a scenario in which communication between the wireless device and more than one transmission and reception point (TRP) of the cellular base station is implemented:

[0160] For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and

[0161] The total number of SRS resources configured for all TRPs of the cellular base station is not greater than N,

[0162] Where N represents the maximum number of layers supported by the wireless device for uplink transmission.

[0163] (13) The wireless device according to (12), wherein the wireless device is connected to the cellular base station.

[0164] The scenario of communication between more than one TRP of a station:

[0165] SRS resource sets configured for a TRP are associated with the same SRS triggering state, and SRS resource sets configured for different TRPs are associated with different SRS triggering states, and a mapping between an SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on the SRS triggering state; or

[0166] SRS resource sets configured for different TRPs are associated with the same SRS triggering state, and the mapping between SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on a predetermined rule.

[0167] (14) A cellular base station, the cellular base station comprising:

[0168] at least one antenna;

[0169] at least one radio component coupled to the at least

[0170] an antenna; and

[0171] a processor coupled to the at least one radio;

[0172] The processor is configured as follows:

[0173] Sending at least one radio resource control (RRC) signaling to a wireless device via the at least one radio component, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and

[0174] An SRS is received from the wireless device via the at least one radio component on a configured set of SRS resources, wherein each SRS is received on one SRS resource of the configured set of SRS resources.

[0175] (15) The cellular base station according to (14), wherein

[0176] The processor is further configured to receive capability information from the wireless device via the at least one radio component, the capability information indicating whether the wireless device supports simultaneous transmission of multiple SRSs for non-codebook in the same symbol and / or a maximum number of SRSs for non-codebook that are supported to be simultaneously transmitted in one symbol; and

[0177] In the case that the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

[0178] (16) The cellular base station according to (14) or (15), wherein

[0179] At least two SRS resources among the N SRS resources occupy the same physical resource block (PRB).

[0180] (17) The cellular base station according to (14) or (15), wherein

[0181] A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

[0182] (18) The cellular base station according to (14) or (15), wherein

[0183] A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

[0184] (19) The cellular base station according to (18), wherein

[0185] configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or

[0186] The N SRS resources are uniformly configured in the more than one SRS resource set used for aperiodic SRS transmission.

[0187] (20) The cellular base station according to (18), wherein for the more than one SRS resource sets,

[0188] Set one or more of the following:

[0189] The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information.

[0190] associated with a CSI-RS resource;

[0191] The more than one SRS resource sets are configured with the same power control parameter; and

[0192] The more than one SRS resource sets are configured with the same SRS triggering state.

[0193] (21) The cellular base station according to (18), wherein

[0194] The N SRS resources configured in the more than one SRS resource sets are ordered according to an identifier of the SRS resource set.

[0195] (22) The cellular base station according to (21), wherein the processor is further configured to

[0196] transmitting, via the at least one radio component, downlink control information (DCI) to the wireless device, the downlink control information (DCI) indicating at least one SRS resource from the N SRS resources by indicating at least one identifier, the at least one identifier being based on an order corresponding to the at least one SRS resource, and

[0197] In response to the DCI, uplink data is received via the at least one radio component using precoding information corresponding to the at least one SRS resource.

[0198] (23) The cellular base station according to (14) or (15), wherein for a scenario in which communication between the wireless device and more than one transmission and reception point (TRP) of the cellular base station is implemented:

[0199] For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and

[0200] The total number of SRS resources configured for all TRPs of the cellular base station is not greater than N,

[0201] Where N represents the maximum number of layers supported by the wireless device for uplink transmission.

[0202] (24) The cellular base station according to (23), wherein for implementing the wireless device and the cellular base station

[0203] The scenario of communication between more than one TRP of a station:

[0204] SRS resource sets configured for a TRP are associated with the same SRS triggering state, and SRS resource sets configured for different TRPs are associated with different SRS triggering states, and a mapping between an SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on the SRS triggering state; or

[0205] SRS resource sets configured for different TRPs are associated with the same SRS triggering state, and the mapping between SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on a predetermined rule.

[0206] (25) A method for a wireless device, the method comprising:

[0207] Receiving at least one radio resource control (RRC) signaling from a cellular base station, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and

[0208] The SRS is sent to the cellular base station on a set of configured SRS resources, wherein each

[0209] The SRS is sent on one SRS resource in a configured set of SRS resources. (26) The method according to (25), wherein

[0210] The method further includes: sending capability information to the cellular base station, the capability information indicating whether the wireless device supports simultaneous transmission of multiple non-codebook SRSs in the same symbol and / or a maximum number of non-codebook SRSs supported to be simultaneously transmitted in one symbol; and

[0211] In the case that the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

[0212] (27) The method according to (25) or (26), wherein

[0213] A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

[0214] (28) The method according to (25) or (26), wherein

[0215] A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

[0216] (29) The method according to (28), wherein

[0217] configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or

[0218] The N SRS resources are uniformly configured in the more than one SRS resource set used for aperiodic SRS transmission.

[0219] (30) The method according to (28), wherein for the more than one SRS resource sets, the configuration is

[0220] One or more of the following:

[0221] The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information.

[0222] associated with a CSI-RS resource;

[0223] The more than one SRS resource sets are configured with the same power control parameter; and

[0224] The more than one SRS resource sets are configured with the same SRS triggering state.

[0225] (31) The method according to (28), wherein

[0226] The method further includes: receiving downlink control information (DCI) triggering aperiodic SRS transmission from the cellular base station, and wherein

[0227] The method also includes: if the gap from the last received symbol of the non-zero power (NZP) channel state information reference signal (CSI-RS) resource associated with the second group of N SRS resources to the first symbol of the non-periodic SRS transmission is less than M orthogonal frequency division multiplexing (OFDM) symbols, the SRS precoding information is not updated, where M>42, and the time length of the M symbols is calculated based on the minimum of the subcarrier spacing (SCS) of the NZP-CSI-RS and the SCS of the SRS to be sent non-periodically.

[0228] (32) The method according to (31), wherein

[0229] The value of M is sent by the wireless device to the cellular base station, or

[0230] This value of M is defined in advance as a fixed value.

[0231] (33) The method according to (28), wherein

[0232] The N SRS resources configured in the more than one SRS resource sets are ordered according to an identifier of the SRS resource set.

[0233] (34) The method of (25) or (26), wherein for a scenario in which communication between the wireless device and more than one transmit and receive point (TRP) of the cellular base station is implemented:

[0234] For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and

[0235] The total number of SRS resources configured for all TRPs of the cellular base station is not greater than N, and

[0236] SRS resource sets configured for different TRPs are associated with the same SRS triggering state or different SRS triggering states.

[0237] Where N represents the maximum number of layers supported by the wireless device for uplink transmission.

[0238] (35) A method for a cellular base station, the method comprising:

[0239] Sending at least one radio resource control (RRC) signaling to a wireless device, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and

[0240] An SRS is received from the wireless device on a configured set of SRS resources, wherein each

[0241] The SRS is received on one SRS resource in a configured set of SRS resources. (36) The method according to (35), wherein

[0242] The method further includes: receiving capability information from the wireless device, the capability information indicating whether the wireless device supports simultaneous transmission of multiple SRSs for non-codebook in the same symbol and / or a maximum number of SRSs for non-codebook that are supported to be simultaneously transmitted in one symbol; and

[0243] In the case that the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

[0244] (37) The method according to (35) or (36), wherein

[0245] A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

[0246] (38) The method according to (35) or (36), wherein

[0247] A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

[0248] (39) The method according to (38), wherein

[0249] configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or

[0250] The N SRS resources are uniformly configured in the more than one SRS resource set used for aperiodic SRS transmission.

[0251] (40) The method according to (38), wherein for the more than one SRS resource sets,

[0252] One or more of the following:

[0253] The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information.

[0254] associated with a CSI-RS resource;

[0255] The more than one SRS resource sets are configured with the same power control parameter; and

[0256] The more than one SRS resource sets are configured with the same SRS triggering state.

[0257] (41) The method according to (38), wherein

[0258] The N SRS resources configured in the more than one SRS resource sets are ordered according to an identifier of the SRS resource set.

[0259] (42) The method of (35) or (36), wherein for a scenario in which communication between the wireless device and more than one transmit and receive point (TRP) of the cellular base station is implemented:

[0260] For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and

[0261] The total number of SRS resources configured for all TRPs of the cellular base station is not greater than N, and

[0262] SRS resource sets configured for different TRPs are associated with the same SRS triggering state or different SRS triggering states.

[0263] Where N represents the maximum number of layers supported by the wireless device for uplink transmission.

[0264] (43) A device comprising:

[0265] A processor configured to cause the wireless device to:

[0266] receiving at least one radio resource control (RRC) signaling from a cellular base station via the at least one radio component, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and

[0267] An SRS is transmitted to the cellular base station via the at least one radio component on a configured set of SRS resources, wherein each SRS is transmitted on one SRS resource in the configured set of SRS resources.

[0268] (44) A computer-readable storage medium storing program instructions, wherein the program instructions, when executed by a computer system, cause the computer system to perform any of the steps described in (25) to (34).

[0269] The method described.

[0270] (45) A computer-readable storage medium storing program instructions, wherein the program instructions, when executed by a computer system, cause the computer system to perform any of the steps described in (35) to (42).

[0271] The method described.

[0272] (46) A computer program product comprising program instructions which, when executed by a computer, cause the computer to perform any of the methods described in (25) to (34).

[0273] (47) A computer program product comprising program instructions which, when executed by a computer, cause the computer to perform any of the methods described in (35) to (42).

Claims

1. A wireless device, comprising: at least one antenna; at least one radio component coupled to the at least one antenna; and a processor coupled to the at least one radio; The processor is configured to: receiving at least one radio resource control (RRC) signaling from a cellular base station via the at least one radio component, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and An SRS is transmitted to the cellular base station via the at least one radio component on a configured set of SRS resources, wherein each SRS is transmitted on one SRS resource in the configured set of SRS resources.

2. The wireless device of claim 1, wherein The processor is further configured to send capability information to the cellular base station via the at least one radio component, the capability information indicating whether the wireless device supports simultaneous transmission of multiple SRSs for non-codebook in the same symbol and / or a maximum number of SRSs for non-codebook that are supported to be simultaneously transmitted in one symbol; and In a case where the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

3. The wireless device according to claim 1 or 2, wherein At least two SRS resources among the N SRS resources occupy the same physical resource block (PRB).

4. The wireless device according to claim 1 or 2, wherein A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

5. The wireless device according to claim 1 or 2, wherein A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

6. The wireless device of claim 5, wherein configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or The N SRS resources are uniformly configured in the more than one SRS resource sets used for aperiodic SRS transmission.

7. The wireless device of claim 5, wherein for the more than one SRS resource sets, one or more of the following are configured: The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information reference signal (CSI-RS) resource; The more than one SRS resource sets are configured with the same power control parameter; and The more than one SRS resource sets are configured with the same SRS triggering state.

8. The wireless device of claim 5, wherein The processor is further configured to receive, via the at least one radio component, downlink control information (DCI) triggering aperiodic SRS transmission from the cellular base station, and wherein The processor is also configured to not update the SRS precoding information if the gap from the last received symbol of the non-zero power (NZP) channel state information reference signal (CSI-RS) resource associated with the second group of N SRS resources to the first symbol of the non-periodic SRS transmission is less than M orthogonal frequency division multiplexing (OFDM) symbols, where M>42, and the time length of the M symbols is calculated based on the minimum of the subcarrier spacing (SCS) of the NZP-CSI-RS and the SCS of the SRS to be sent non-periodically.

9. The wireless device of claim 8, wherein The processor is further configured to send capability information indicating a value of M to the cellular base station via the at least one radio component, or The value of M is defined in advance as a fixed value.

10. The wireless device of claim 5, wherein The N SRS resources configured in the more than one SRS resource sets are ordered according to identifiers of the SRS resource sets.

11. The wireless device of claim 10, wherein the processor is further configured to receive downlink control information (DCI) from the cellular base station via the at least one radio component, the downlink control information (DCI) indicating at least one SRS resource from the N SRS resources by indicating at least one identifier, the at least one identifier being based on an order corresponding to the at least one SRS resource, and In response to the DCI, uplink data is transmitted via the at least one radio component using precoding information corresponding to the at least one SRS resource.

12. The wireless device according to claim 1 or 2, wherein for a scenario in which communication between the wireless device and more than one transmit and receive point (TRP) of the cellular base station is implemented: For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and The total number of the SRS resources configured for all TRPs of the cellular base station is not greater than N, Wherein N represents the maximum number of layers supported by the wireless device for uplink transmission.

13. The wireless device of claim 12, wherein for the scenario of enabling communication between the wireless device and the more than one TRP of the cellular base station: SRS resource sets configured for a TRP are associated with the same SRS triggering state, and SRS resource sets configured for different TRPs are associated with different SRS triggering states, and a mapping between an SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on the SRS triggering state; or SRS resource sets configured for different TRPs are associated with the same SRS triggering state, and the mapping between SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on a predetermined rule.

14. A cellular base station, comprising: at least one antenna; at least one radio component coupled to the at least one antenna; and a processor coupled to the at least one radio; The processor is configured to: sending at least one radio resource control (RRC) signaling to a wireless device via the at least one radio component, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, And each SRS resource is configured with a port; and An SRS is received from the wireless device via the at least one radio component on a configured set of SRS resources, wherein each SRS is received on one SRS resource in the configured set of SRS resources.

15. The cellular base station according to claim 14, wherein The processor is further configured to receive capability information from the wireless device via the at least one radio component, the capability information indicating whether the wireless device supports simultaneous transmission of multiple SRSs for non-codebook in the same symbol and / or a maximum number of SRSs for non-codebook that are supported to be simultaneously transmitted in one symbol; and In a case where the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

16. The cellular base station according to claim 14 or 15, wherein At least two SRS resources among the N SRS resources occupy the same physical resource block (PRB).

17. The cellular base station according to claim 14 or 15, wherein A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

18. The cellular base station according to claim 14 or 15, wherein A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

19. The cellular base station according to claim 18, wherein configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or The N SRS resources are uniformly configured in the more than one SRS resource sets used for aperiodic SRS transmission.

20. The cellular base station according to claim 18, wherein for the more than one SRS resource sets, one or more of the following are configured: The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information reference signal (CSI-RS) resource; The more than one SRS resource sets are configured with the same power control parameter; and The more than one SRS resource sets are configured with the same SRS triggering state.

21. The cellular base station according to claim 18, wherein The N SRS resources configured in the more than one SRS resource sets are ordered according to identifiers of the SRS resource sets.

22. The cellular base station of claim 21 , wherein the processor is further configured to send downlink control information (DCI) to the wireless device via the at least one radio component, the downlink control information (DCI) indicating at least one SRS resource from the N SRS resources by indicating at least one identifier, the at least one identifier being based on an order corresponding to the at least one SRS resource, and In response to the DCI, uplink data is received via the at least one radio component using precoding information corresponding to the at least one SRS resource.

23. The cellular base station of claim 14 or 15, wherein for a scenario in which communication between the wireless device and more than one transmit and receive point (TRP) of the cellular base station is implemented: For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and The total number of the SRS resources configured for all TRPs of the cellular base station is not greater than N, Wherein N represents the maximum number of layers supported by the wireless device for uplink transmission.

24. The cellular base station of claim 23, wherein for the scenario of enabling communication between the wireless device and more than one TRP of the cellular base station: SRS resource sets configured for a TRP are associated with the same SRS triggering state, and SRS resource sets configured for different TRPs are associated with different SRS triggering states, and a mapping between an SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on the SRS triggering state; or SRS resource sets configured for different TRPs are associated with the same SRS triggering state, and the mapping between SRS resource indicator (SRI) / quasi co-location (QCL) / spatial relationship and a specific SRS resource set is determined based on a predetermined rule.

25. A method for a wireless device, the method comprising: Receive at least one radio resource control (RRC) signaling from a cellular base station, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and An SRS is transmitted to the cellular base station on a configured set of SRS resources, wherein each SRS is transmitted on one SRS resource in the configured set of SRS resources.

26. The method of claim 25, wherein The method further comprises: Sending capability information to the cellular base station, the capability information indicating whether the wireless device supports simultaneous transmission of multiple non-codebook SRSs in the same symbol and / or a maximum number of non-codebook SRSs supported to be simultaneously transmitted in one symbol; and In a case where the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

27. The method according to claim 25 or 26, wherein A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

28. The method according to claim 25 or 26, wherein A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

29. The method according to claim 28, wherein configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or The N SRS resources are uniformly configured in the more than one SRS resource sets used for aperiodic SRS transmission.

30. The method of claim 28, wherein for the more than one SRS resource sets, one or more of the following are configured: The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information reference signal (CSI-RS) resource; The more than one SRS resource sets are configured with the same power control parameter; and The more than one SRS resource sets are configured with the same SRS triggering state.

31. The method of claim 28, wherein The method further comprises: receiving downlink control information (DCI) triggering aperiodic SRS transmission from the cellular base station, and wherein The method also includes: if the gap from the last received symbol of the non-zero power (NZP) channel state information reference signal (CSI-RS) resource associated with the second group of N SRS resources to the first symbol of the non-periodic SRS transmission is less than M orthogonal frequency division multiplexing (OFDM) symbols, the SRS precoding information is not updated, where M>42, and the time length of the M symbols is calculated based on the minimum of the subcarrier spacing (SCS) of the NZP-CSI-RS and the SCS of the SRS to be sent non-periodically.

32. The method of claim 31, wherein The value of M is sent by the wireless device to the cellular base station, or The value of M is defined in advance as a fixed value.

33. The method of claim 28, wherein The N SRS resources configured in the more than one SRS resource sets are ordered according to identifiers of the SRS resource sets.

34. The method of claim 25 or 26, wherein for a scenario in which communication between the wireless device and more than one transmit and receive point (TRP) of the cellular base station is implemented: For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and The total number of the SRS resources configured for all TRPs of the cellular base station is not greater than N, and SRS resource sets configured for different TRPs are associated with the same SRS triggering state or different SRS triggering states. Wherein N represents the maximum number of layers supported by the wireless device for uplink transmission.

35. A method for a cellular base station, the method comprising Sending at least one radio resource control (RRC) signaling to a wireless device, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and An SRS is received from the wireless device on a configured set of SRS resources, wherein each SRS is received on one SRS resource in the configured set of SRS resources.

36. The method of claim 35, wherein The method further comprises: receiving capability information from the wireless device, the capability information indicating whether the wireless device supports simultaneous transmission of multiple SRSs for non-codebook in the same symbol and / or a maximum number of SRSs for non-codebook that are supported to be simultaneously transmitted in one symbol; and In a case where the wireless device supports simultaneously transmitting a plurality of SRSs for non-codebook in the same symbol, at least two SRS resources among the N SRS resources occupy the same symbol.

37. The method according to claim 35 or 36, wherein A first group of N SRS resources is configured in one SRS resource set for periodic or semi-persistent SRS transmission.

38. The method according to claim 35 or 36, wherein A second group of N SRS resources is configured in more than one SRS resource set for aperiodic SRS transmission.

39. The method of claim 38, wherein configuring the N SRS resources in any combination in the more than one SRS resource sets used for aperiodic SRS transmission; or The N SRS resources are uniformly configured in the more than one SRS resource sets used for aperiodic SRS transmission.

40. The method of claim 38, wherein for the more than one SRS resource sets, one or more of the following are configured: The more than one SRS resource sets are associated with the same non-zero power (NZP) channel state information reference signal (CSI-RS) resource; The more than one SRS resource sets are configured with the same power control parameter; and The more than one SRS resource sets are configured with the same SRS triggering state.

41. The method of claim 38, wherein The N SRS resources configured in the more than one SRS resource sets are ordered according to identifiers of the SRS resource sets.

42. The method of claim 35 or 36, wherein for a scenario in which communication between the wireless device and more than one transmit and receive point (TRP) of the cellular base station is implemented: For each TRP, a third group of at most N SRS resources for non-codebook is configured in at least one SRS resource set for non-periodic SRS transmission, and The total number of the SRS resources configured for all TRPs of the cellular base station is not greater than N, and SRS resource sets configured for different TRPs are associated with the same SRS triggering state or different SRS triggering states. Wherein N represents the maximum number of layers supported by the wireless device for uplink transmission.

43. An apparatus, comprising: A processor configured to cause the wireless device to: receiving at least one radio resource control (RRC) signaling from a cellular base station via the at least one radio component, wherein the at least one RRC signaling configures at least one set of N sounding reference signal (SRS) resources for non-codebook, N>4, and each SRS resource is configured with one port; and An SRS is transmitted to the cellular base station via the at least one radio component on a configured set of SRS resources, wherein each SRS is transmitted on one SRS resource in the configured set of SRS resources.

44. A computer-readable storage medium storing program instructions, wherein the program instructions, when executed by a computer system, cause the computer system to perform any of the methods according to claims 25 to 34.

45. A computer-readable storage medium storing program instructions, wherein the program instructions, when executed by a computer system, cause the computer system to perform any of the methods according to claims 35 to 42.

46. ​​A computer program product comprising program instructions which, when executed by a computer, cause the computer to perform any of the methods of claims 25 to 34.

47. A computer program product comprising program instructions which, when executed by a computer, cause the computer to perform any of the methods of claims 35 to 42.

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