Srs conflict handling

Abstract

The present disclosure relates to SRS collision handling. Apparatuses, systems, and methods for SRS collision handling. A wireless device can determine whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that the simultaneous transmission of the at least two SRSs is allowed, then the at least two SRSs are simultaneously transmitted; and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, then one of the at least two SRSs is transmitted and the other of the at least two SRSs is dropped.

Description

TECHNICAL FIELD

[0001] The present application relates generally to wireless communication systems, including apparatuses, systems, and methods for sounding reference signal (SRS) collision handling. BACKGROUND

[0002] Wireless mobile communication technology uses various standards and protocols to transmit data between base stations and wireless communication devices. Wireless communication system standards and protocols can include, for example, the Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) (such as 4G), 3GPP New Radio (NR) (such as 5G), and IEEE 802.11 standards (commonly referred to as Wi-Fi® within the industry organization) for wireless local area networks (WLANs).

[0003] As contemplated by 3GPP, different wireless communication system standards and protocols can use various radio access networks (RANs) to enable base stations of the RAN (which can also be referred to at times as a RAN node, network node, or simply a node) to communicate with wireless communication devices referred to as user equipment (UE). 3GPP RANs can 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 can 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 (which is sometimes simply referred to as LTE), and NG-RAN implements NR RAT (which is sometimes also referred to herein as 5G RAT, 5G NR RAT, or simply NR). In certain deployments, E-UTRAN can also implement NR RAT. In certain deployments, NG-RAN can also implement LTE RAT.

[0005] A base station used by a RAN can correspond to that RAN. One example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly denoted as an Evolved Node B, Enhanced Node B, eNodeB, or eNB). One example of an NG-RAN base station is a Next Generation Node B (sometimes also referred to as a g Node B or gNB).

[0006] ​The RAN, through its connection with a core network (CN), together with the core network (CN), provides the communication service for external entities. For example, an E-UTRAN can utilize an Evolved Packet Core (EPC), while a NG-RAN can utilize a 5G Core (5GC).

[0007] The frequency bands of 5G NR can be split into two or more different frequency ranges. For example, frequency range 1 (FR1) can include frequency bands below 6 GHz that can be used by previous standards and can potentially be extended to cover 410 MHz to 7125 MHz of new spectrum product. Frequency range 2 (FR2) can include frequency bands from 24.25 GHz to 52.6 GHz. The frequency bands in the millimeter wave (mmWave) range of FR2 can have a smaller range than the bands in FR1 but potentially a higher available bandwidth. The skilled person will recognize that these frequency ranges provided by way of example can change over time or region. SUMMARY

[0008] The present disclosure provides apparatuses, systems, and methods for sounding reference signal (SRS) collision handling.

[0009] Embodiments disclosed herein include a wireless device comprising: at least one antenna; and a processor; wherein the wireless device is configured to: determine whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that the simultaneous transmission of the at least two SRSs is allowed, simultaneously transmit the at least two SRSs; and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, transmit one of the at least two SRSs and drop the other of the at least two SRSs.

[0010] Embodiments disclosed herein include a network device comprising: at least one antenna; and a processor; wherein the network device is configured to: transmit control signaling to a wireless device; and receive one of at least two SRSs from the wireless device, wherein the other of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap.

[0011] Embodiments disclosed herein include a method performed by a wireless device, the method comprising: determining whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that the simultaneous transmission of the at least two SRSs is allowed, simultaneously transmitting the at least two SRSs; and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, transmitting one of the at least two SRSs and dropping the other of the at least two SRSs.

[0012] Embodiments disclosed herein include a method performed by a network device, the method comprising: transmitting control signaling to a wireless device; and receiving one of at least two SRSs from the wireless device, wherein another of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap.

[0013] Embodiments disclosed herein include a non-transitory computer-readable storage medium having stored thereon instructions that, when executed by a processor, cause a wireless device to: determine whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmit the at least two SRSs; and if it is determined that simultaneous transmission of the at least two SRSs is not allowed, then transmit one of the at least two SRSs and drop another of the at least two SRSs.

[0014] Embodiments disclosed herein include a non-transitory computer-readable storage medium having stored thereon instructions that, when executed by a processor, cause a network device to: transmit control signaling to a wireless device; and receive one of at least two SRSs from the wireless device, wherein another of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap.

[0015] Embodiments disclosed herein include a computer program product comprising instructions stored thereon that, when executed by a processor, cause a wireless device to: determine whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmit the at least two SRSs; and if it is determined that simultaneous transmission of the at least two SRSs is not allowed, then transmit one of the at least two SRSs and drop another of the at least two SRSs.

[0016] Embodiments disclosed herein include a computer program product comprising instructions stored thereon that, when executed by a processor, cause a network device to: transmit control signaling to a wireless device; and receive one of at least two SRSs from the wireless device, where another of the at least two SRSs is dropped by the wireless device, where the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap. BRIEF DESCRIPTION OF DRAWINGS

[0017] To facilitate an understanding of this description, a number of terms are defined below. Terminology used throughout this description shall include all grades of significance, from the most specific to the most general, of the identified terms.

[0018] Figure 1 An exemplary architecture of a wireless communication system in accordance with embodiments disclosed herein is shown.

[0019] Figure 2 A system for performing signaling between a wireless device and a network device in accordance with embodiments disclosed herein is shown.

[0020] Figure 3 An exemplary structure of a SRS resource set in accordance with embodiments disclosed herein is shown.

[0021] Figure 4 An exemplary process of SRS collision handling performed by a wireless device in accordance with embodiments disclosed herein is shown.

[0022] Figure 5 An exemplary dropping of a SRS with lower priority in accordance with embodiments disclosed herein is shown.

[0023] Figure 6A , Figure 6B and Figure 6C An exemplary scaling of a SRS in accordance with embodiments disclosed herein is shown.

[0024] Figure 7 An exemplary communication process between a wireless device and a network device in accordance with embodiments disclosed herein is shown.

[0025] Figure 8 An exemplary communication process between a wireless device and a network device in accordance with embodiments disclosed herein is shown. DETAILED DESCRIPTION

[0026] The embodiments are described with respect to UEs. However, the reference to UEs is provided for illustrative purposes only. The example embodiments can be used with any electronic component that can establish a connection with a network and is configured with hardware, software, and / or firmware to exchange information and data with the network. Thus, the UEs as described herein are used to represent any appropriate electronic component.

[0027] Figure 1 An example architecture of a wireless communication system 100 is shown in accordance with the embodiments disclosed herein. The description provided below is directed to an example wireless communication system 100 that operates in conjunction with the LTE system standards and / or 5G or NR system standards provided by 3GPP Technical Specifications.

[0028] As Figure 1 shown, the wireless communication system 100 includes UE 102 and UE 104 (although any number of UEs can be used). In this example, the UEs 102 and 104 are shown as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks) but can also include any mobile or non-mobile computing device configured for wireless communication.

[0029] The UEs 102 and 104 can be configured to wirelessly couple with a RAN 106. In embodiments, the RAN 106 can be an NG-RAN, an E-UTRAN, etc. The UEs 102 and 104 utilize connections (or channels) 108 and 110, respectively, with the RAN 106 via

[0030] In this example, the connections 108 and 110 are air interfaces that enable

[0031] In some embodiments, the UEs 102 and 104 can also be configured to directly exchange communication data via a sidelink interface 116. The UE 104 is shown to be configured to access an access point (shown as AP 118) via connection 120. In turn, the AP 118 can access a carrier network (e.g., a In this example, the AP 118 can not necessarily be connected to another network (e.g., the Internet) through the CN 124.

[0032] In embodiments, the UEs 102 and 104 can be configured to communicate using orthogonal frequency division multiplexing (OFDM) communication signals with each other or with the base stations 112 and / or the base stations 114 over a multicarrier communication channel in accordance with various communication techniques, such as, but not limited to, an orthogonal frequency division multiple access (OFDMA) communication technique (e.g., for downlink communications) or a single carrier frequency division multiple access (SC-FDMA) communication technique (e.g., for uplink and ProSe or sidelink communications), although the scope of the embodiments is not limited in this respect. The OFDM signals can comprise a plurality of orthogonal subcarriers.

[0033] In some embodiments, all or a portion of base station 112 or base station 114 can be implemented as one or more software entities running on a server computer as part of a virtual network. Additionally, or in other embodiments, base station 112 or base station 114 can be configured to communicate with each other via interface 122. In embodiments where wireless communication system 100 is an LTE system (e.g., when CN 124 is an EPC), interface 122 can be an X2 interface. The X2 interface can be defined between two or more base stations connected to a EPC, such as between two or more eNBs, and / or between two eNBs connected to a EPC. In embodiments where wireless communication system 100 is a NR system (e.g., when CN 124 is a 5GC), interface 122 can be an Xn interface. The Xn interface can be defined between two or more base stations connected to a 5GC, such as between two or more gNBs, between a base station 112 (e.g., gNB) and an eNB connected to a 5GC, and / or between two eNBs connected to a 5GC (e.g., CN 124).

[0034] The RAN 106 is shown to be communicatively coupled to a CN 124. The CN 124 can include one or more network elements 126, which are configured to provide various data and telecommunications services to customers / subscribers (e.g., users of UEs 102 and 104) who are connected to the CN 124 via the RAN 106. The components of the CN 124 can be implemented in one physical device or separate physical devices, including components to read and execute instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium).

[0035] In embodiments, the CN 124 can be an EPC and the RAN 106 can interface with the CN 124 via an S1 interface 128. In embodiments, the S1 interface 128 can be split into two parts, an S1 user plane (S1-U) interface, which carries traffic data between the base stations 112 or base stations 114 and a serving gateway (S-GW), and an S1-MME interface, which is a signaling interface between the base stations 112 or base stations 114 and a mobility management entity (MME).

[0036] In embodiments, the CN 124 can be a 5GC, and the RAN 106 can be connected with the CN 124 via an NG interface 128. In embodiments, the NG interface 128 can be split into two parts: an NG user plane (NG-U) interface, which carries traffic data between the base stations 112 or 114 and user plane functions (UPFs); and an SI control plane (NG-C) interface, which is a signaling interface between the base stations 112 or 114 and access and mobility management functions (AMFs).

[0037] Generally, the application server 130 can be an element of an application that utilizes the CN 124 to provide resources using Internet Protocol (IP) bearing resources (e.g., packet switched data services). The application server 130 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for UEs 102 and 104 via the CN 124. The application server 130 can communicate with the CN 124 over an IP communications interface 132.

[0038] Figure 2 A system 200 for performing signaling 234 between a wireless device 202 and a network device 218 is shown, in accordance with embodiments disclosed herein. The system 200 can be part of a wireless communication system as described herein. The wireless device 202 can be, for example, a UE of the wireless communication system. The network device 218 can be, for example, a base station (e.g., an eNB or gNB) of the wireless communication system.

[0039] The wireless device 202 can include one or more processors 204. The processors 204 can execute instructions to cause performance of various operations of the wireless device 202 as described herein. The processors 204 can 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.

[0040] The wireless device 202 can include a memory 206. The memory 206 can be a non-transitory computer-readable storage medium that stores instructions 208 (which can include, for example, instructions executed by the processors 204). The instructions 208 can also be referred to as program code or computer programs. The memory 206 can also store data used by the processors 204 and results of operations performed by the processors.

[0041] Wireless device 202 may include one or more transceivers 210, which may include radio frequency (RF) transmitter and / or receiver circuitry that uses the antenna 212 of wireless device 202 to facilitate signaling to and / or from wireless device 202 with other devices (e.g., network device 218) according to the corresponding RAT (e.g., signaling 234).

[0042] Wireless device 202 may include one or more antennas 212 (e.g., one, two, four or more). In embodiments with multiple antennas 212, 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 and frequency resources. This practice may be referred to, for example, as a multiple-input multiple-output (MIMO) practice (referring to multiple antennas used separately on the transmitting and receiving sides to implement this aspect). MIMO transmissions performed by wireless device 202 may be achieved according to precoding (or digital beamforming) applied at wireless device 202, which multiplexes the data streams through antennas 212 based on known or assumed channel characteristics, such that each data stream is received with 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). Some implementations may use a single-user MIMO (SU-MIMO) method (where the entire data stream is directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) method (where individual data streams may be directed to individual (different) receivers at different locations in the airspace).

[0043] In some implementations with multiple antennas, the wireless device 202 may implement analog beamforming techniques, thereby relatively adjusting the phase of the signal transmitted by the antenna 212 so that the (joint) transmission of the antenna 212 can be guided (this is sometimes referred to as beam steering).

[0044] Wireless device 202 may include one or more interfaces 214. Interfaces 214 can be used to provide input to or output to wireless device 202. For example, wireless device 202 as a UE may include interfaces 214, such as microphones, speakers, touchscreens, buttons, etc., to allow users of the UE to input to and / or output to the UE. Other interfaces of such a UE may consist of transmitters, receivers, and other circuitry (e.g., in addition to the transceiver 210 / antenna 212 already described) that allow the UE to communicate with other devices, and may be based on known protocols (e.g., (etc.) to perform the operation.

[0045] The wireless device 202 can include an SRS collision handling module 216. The SRS collision handling module 216 can be implemented via hardware, software, or a combination thereof. For example, the SRS collision handling module 216 can be implemented as a processor, circuit, and / or instructions 208 stored in the memory 206 and executed by the processor 204. In some examples, the SRS collision handling module 216 can be integrated within the processor 204 and / or the transceiver 210. For example, the SRS collision handling module 216 can be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuitry) within the processor 204 or the transceiver 210.

[0046] The SRS collision handling module 216 can be used for various aspects of the present disclosure, for example, aspects of the method 1000 of FIG. 10. The SRS collision handling module 216 is configured to determine whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed, transmit the at least two SRSs simultaneously if it is determined that the simultaneous transmission of the at least two SRSs is allowed, and transmit one of the at least two SRSs and drop the other of the at least two SRSs if it is determined that the simultaneous transmission of the at least two SRSs is not allowed. Figures 4 to 8

[0047] The network device 218 can include one or more processors 220. The processor(s) 220 can execute instructions to perform various operations of the network device 218 as described herein. The processor(s) 204 can include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, a FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0048] The network device 218 can include a memory 222. The memory 222 can be a non-transitory computer-readable storage medium that stores instructions 224 (which can include, for example, instructions for execution by the processor(s) 220). The instructions 224 can also be referred to as program code or computer programs. The memory 222 can also store data used by the processor(s) 220 and results produced by the processor(s).

[0049] The network device 218 can include one or more transceivers 226 that can include RF transmitter and / or receiver circuitry that uses the antenna(s) 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., the wireless device 202) in accordance with the corresponding RAT.

[0050] ​The network device 218 can include one or more antennas 228 (e.g., one, two, four, or more). In embodiments with multiple antennas 228, the network device 218 can perform MIMO, digital beamforming, analog beamforming, beam steering, etc., as has been described.

[0051] The network device 218 can include one or more interfaces 230. The interfaces 230 can be used to provide input to or output from the network device 218. For example, the network device 218 as a base station can include interfaces 230 consisting of transmitters, receivers, and other circuitry (e.g., in addition to the transceivers 226 / antennas 228 already described) that enable the base station to communicate with other equipment in the core network and / or to communicate with external networks, computers, databases, etc. for the purposes of operating, managing, and maintaining the base station or other equipment operably connected thereto.

[0052] The network device 218 can include an SRS collision handling module 232. The SRS collision handling module 232 can be implemented via hardware, software, or a combination thereof. For example, the SRS collision handling module 232 can be implemented as instructions 224 stored in the memory 222 and executed by the processor 220, circuitry, or a combination thereof. In some examples, the SRS collision handling module 232 can be integrated within the processor 220 and / or the transceiver 226. For example, the SRS collision handling module 232 can be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuitry) within the processor 220 or the transceiver 226.

[0053] The SRS collision handling module 232 can be used for various aspects of the present disclosure, for example, aspects of Figures 7 to 8 The SRS collision handling module 232 is configured to transmit first control signaling to a wireless device; and receive one of at least two SRSs from the wireless device, where another of the at least two SRSs is dropped by the wireless device, where the control signaling indicates whether to drop all symbols of the other of the at least two SRSs or only overlapping symbols if SRS resources of the at least two SRSs partially overlap.

[0054] In Rel-15, a UE can be configured with multiple SRS resource sets with different usage, e.g., codebook (CB), non-codebook (NCB), beam management (BM), and antenna switching (AS). Each SRS resource set can include 1 or more than 1 SRS resource. Each SRS resource can be transmitted in 1, 2, or 4 symbols. In the frequency domain, different comb structures (e.g., comb2 or comb4) configured by RRC signaling can be used. If a comb2 comb structure is used, SRS is mapped to every two subcarriers in the frequency domain. If a comb4 comb structure is used, SRS is mapped to every four subcarriers in the frequency domain. Figure 3 An example structure of SRS resource sets is shown in accordance with embodiments disclosed herein. As shown, SRS resource set 1 includes SRS resources 1, 2, and 3. SRS resource 3 is configured with 4 symbols in the time domain and a comb2 comb structure in the frequency domain. Figure 3

[0055] For CB or NCB SRS, only 1 SRS resource set can be configured for a bandwidth part (BWP) in Rel-15. For SRS for antenna switching (AS), the number of SRS resources should support xTyR behavior in Rel-15, where x indicates the number of ports per SRS resource and y indicates the number of receive antennas. The number of SRS resources for antenna switching (AS) should be equal to y / x. For SRS for beam management (BM), a UE can report its capability of the maximum number of SRS resource sets it can support, and a base station will not configure more than the maximum number of SRS resource sets for a UE. A UE can support simultaneous transmission of SRS resources in different sets, where the time domain behavior of SRS resource sets should be the same, i.e., periodic / semi-persistent / a-periodic, as defined in 38.214. As defined in 38.214, when the higher layer parameter usage is set to “beamManagement”, only one SRS resource in each of the multiple SRS resource sets can be transmitted at a given time, but SRS resources in different SRS resource sets with the same time domain behavior in the same BWP can be transmitted simultaneously.

[0056] For carrier aggregation (CA) mode, simultaneous transmission of CB / NCB / BM SRS and CB / NCB / BM SRS in different component carriers (CCs) is supported, while simultaneous transmission of AS SRS and CB / NCB / BM / AS SRS is subject to UE capability.

[0057] ​In Rel-17, to support multi-TRP PUSCH transmission, in a BWP, 2 SRS resource sets of CB and 2 SRS resource sets of NCB are supported. Thus, the following SRS collision cases can occur:

[0058] - Case 1: SRS from resource set 1 of CB + SRS from resource set 2 of CB;

[0059] - Case 2: SRS from resource set 3 of NCB + SRS from resource set 4 of NCB;

[0060] - Case 3: SRS from resource set 1 & 2 & 3 & 4 of CB / NCB + other type of SRS.

[0061] The above cases can be for SRS within the same component carrier (CC) or within different CCs.

[0062] Simultaneous transmission of two SRS resource sets of CB / NCB and other type of SRS (i.e., SRS collision) can be an issue. If simultaneous transmission is not supported, how to define UE behavior when collision occurs. If simultaneous transmission is supported, how to define power adjustment.

[0063] The present disclosure provides one or more solutions for resolving SRS collision. However, the number of SRS in SRS collision is not limited to 2, and there can be more than 2 SRS in collision.

[0064] Figure 4 An example process 400 of SRS collision handling performed by a wireless device according to embodiments disclosed herein is shown. At step S402, the wireless device determines whether simultaneous transmission of at least two sounding reference signals (SRS) is allowed. If it is determined that simultaneous transmission of at least two SRS is allowed, then at step S404, the wireless device simultaneously transmits the at least two SRS. If it is determined that simultaneous transmission of at least two SRS is not allowed, then at step S406, the wireless device transmits one of the at least two SRS and drops the other of the at least two SRS.

[0065] In some embodiments of the present disclosure, the wireless device determines that simultaneous transmission of at least two SRS is not allowed based on a scheduling restriction. The scheduling restriction indicates that simultaneous transmission of SRS is not allowed.

[0066] In some embodiments of the present disclosure, simultaneous transmission of at least two SRS is not allowed, and the wireless device determines a priority of each of the at least two SRS. The wireless device transmits one of the at least two SRS having a higher priority and drops the other of the at least two SRS having a lower priority.

[0067] Figure 5 Example dropping of SRS with lower priority is shown in accordance with embodiments disclosed herein. In Figure 5 In the example, the priority of SRS 1 is determined to be higher than the priority of SRS 2. Therefore, SRS 1 is transmitted and SRS 2 is dropped.

[0068] The priority can be determined by one or more of time domain behavior, usage, SRS resource set ID / SRS resource ID, or serving cell ID.

[0069] In some embodiments of the disclosure, the priority is determined by time domain behavior of each of the at least two SRSs. The time domain behavior is selected from a group comprising at least aperiodic, semi-persistent, and periodic. For example, the priority of aperiodic SRS is higher than the priority of semi-persistent SRS, and the priority of semi-persistent SRS is higher than the priority of periodic SRS, i.e., aperiodic SRS > semi-persistent SRS > periodic SRS.

[0070] In some embodiments of the disclosure, the priority is determined by usage / type of each of the at least two SRSs. The usage / type is selected from a group comprising at least codebook (CB), non-codebook (NCB), beam management (BM), and antenna switching (AS). For example, the priority of CB or NCB SRS is higher than the priority of AS SRS, and the priority of AS SRS is higher than the priority of BM SRS, i.e., CB / NCB SRS > AS SRS > BM SRS.

[0071] In some embodiments of the disclosure, the priority is determined by SRS resource set ID or SRS resource ID associated with each of the at least two SRSs. For example, the priority of SRS associated with lower SRS resource set ID or lower SRS resource ID is higher than the priority of SRS associated with higher SRS resource set ID or higher SRS resource ID, i.e., lower SRS resource set ID > higher SRS resource set ID and lower SRS resource ID > higher SRS resource ID.

[0072] In some embodiments of the disclosure, the priority is determined by serving cell ID associated with each of the at least two SRSs. For example, the priority of SRS associated with lower serving cell ID is higher than the priority of SRS associated with higher serving cell ID, i.e., lower serving cell ID > higher serving cell ID. In one example, the priority determination based on serving cell ID is applied to CA case.

[0073] The SRS resources of the at least two SRSs can partially overlap. Therefore, all symbols or only overlapping symbols of the SRSs can be dropped to avoid SRS collision. For example, the wireless device can drop all symbols or only overlapping symbols of the SRS with lower priority.

[0074] In some embodiments of the disclosure, the wireless device receives control signaling from the network device. The control signaling can indicate whether all symbols or only overlapping symbols of the SRSs are dropped if the SRS resources of the SRSs partially overlap. The control signaling can be higher layer signaling, e.g., RRC.

[0075] In some embodiments of the disclosure, the wireless device can determine whether all symbols or only overlapping symbols of the SRSs are dropped based on the usage or type of the SRSs. In one example, the wireless device drops all symbols of the SRSs of AS / CB / NCB because partial dropping can have an impact on channel estimation performance. In another example, the wireless device drops only overlapping symbols of the SRSs of BM because the gNB can apply a beam sweeping operation to receive different symbols, and the gNB can still attempt some gNB beams based on the remaining symbols.

[0076] In some embodiments of the disclosure, the wireless device configures different time domain behaviors for SRSs of codebook (CB) and non-codebook (NCB) based on scheduling restrictions. The scheduling restrictions can indicate that SRSs of codebook (CB) and non-codebook (NCB) should be configured with different time domain behaviors. When collision occurs, the priority can be determined by the time domain behavior, e.g., aperiodic SRS > semi-persistent SRS > periodic SRS.

[0077] In some embodiments of the disclosure, simultaneous transmission of at least two SRSs is allowed. However, the total transmission power of the at least two SRSs can exceed the maximum transmission power. If the total transmission power of the at least two SRSs exceeds the maximum transmission power, the wireless device scales the transmission power of the at least two SRSs such that the total transmission power does not exceed the maximum transmission power.

[0078] In some embodiments of the disclosure, the transmission power of each of the SRSs is scaled to the same transmission power. That is, the maximum transmission power is equally divided for all SRSs. In one example, if the maximum transmission power is 23 dBm, the SRS resources of each of the two SRSs can occupy up to 20 dBm.

[0079] In some embodiments of the present disclosure, the transmission power of each SRS is adjusted by a common adjustment factor. In one example, the transmission power of the resource elements of the SRS is adjusted by Pcmax / Ptx_total, where Pcmax is the maximum transmission power and Ptx_total represents the sum of the planned transmission powers of the SRS resources based on uplink power control.

[0080] In some embodiments of the present disclosure, priority rules can be introduced, where the wireless device only adjusts down SRSs with lower priority. The priority can be determined by one or more of the time domain behavior of the SRS, the usage / type of the SRS, the SRS resource set ID / SRS resource ID, or the serving cell ID (only applicable for CA case). For the time domain behavior of the SRS, the priority is, for example, aperiodic SRS > semi-persistent SRS > periodic SRS. For the type or usage of the SRS, the priority is, for example, CB / NCB SRS > AS SRS > BM SRS. For the SRS resource set ID / SRS resource ID, the priority is, for example, lower SRS resource set ID > higher SRS resource set ID or lower SRS resource ID > higher SRS resource ID. For the serving cell ID, the priority is, for example, lower serving cell ID > higher serving cell ID.

[0081] Figure 6A 、 Figure 6B and Figure 6C Example power adjustments of SRSs according to embodiments disclosed herein are shown. In these figures, Pcmax is the maximum transmission power, P_tx1 represents the planned transmission power of the SRS resources of SRS 1 based on uplink power control, and P_tx2 represents the planned transmission power of the SRS resources of SRS 2 based on uplink power control. In Figure 6A , the transmission power of each of SRS 1 and SRS 2 is adjusted to the same transmission power, i.e., 0.5*Pcmax. In Figure 6B , the transmission power of each of the at least two SRSs is adjusted by a common adjustment factor, i.e., Pcmax / (P_tx1+P_tx2). In Figure 6C , the transmission power of SRS 1 with higher priority is not adjusted, while the transmission power of SRS 2 with lower priority is adjusted by (Pcmax-P_tx1) / P_tx2.

[0082] In some embodiments of the disclosure, a wireless device reports whether simultaneous transmission is supported. For example, a wireless device transmits capability information of the wireless device to a network device regarding simultaneous transmission of SRSs for different cases, respectively. For example, a wireless device can report separate wireless device capabilities regarding simultaneous transmission of SRSs in the same CC or different CCs within a frequency band or a frequency band combination. The wireless device can also report capabilities for different cases (e.g., cases 1 / 2 / 3), respectively. For case 3, for antenna switching, the wireless device can report simultaneous transmission of SRSs of an AS with other SRSs to configure xTyR (x < y) and xTxR, respectively. The wireless device can report whether it supports simultaneous transmission of SRS resource sets of CB / NCB and other SRSs.

[0083] In some embodiments of the disclosure, a wireless device transmits capability information regarding simultaneous transmission of at least two SRSs to a network device via a MAC control element (CE) or uplink control information (UCI). For example, a wireless device can report whether it can support simultaneous transmission of cases 1 / 2 / 3 by MAC CE or UCI. For a wireless device that can support simultaneous multi-panel transmission, the wireless device can support simultaneous transmission of signals in different CCs from different panels. Since panels can change during communication, the wireless device can dynamically report whether some signals can be transmitted simultaneously by MAC CE or UCI. Alternatively, simultaneous transmission can be determined by a panel entity index of a corresponding signal reported by the wireless device via MAC CE or UCI.

[0084] A network device can configure a wireless device based on received capability information of the wireless device. For example, if a wireless device does not allow simultaneous transmission, a network device will not configure SRS resources for the wireless device for simultaneous transmission. If a wireless device allows simultaneous transmission, a network device can configure SRS resources for the wireless device for simultaneous transmission.

[0085] In some embodiments of the disclosure, the wireless device determines whether simultaneous transmission of SRSs is supported based on the configuration of the SRSs. For example, if one or more of the following configurations of SRSs are the same, simultaneous transmission of SRSs is allowed: spatial relation; usage / type; or time domain behavior. In one example, whether SRS resources from two sets can be transmitted simultaneously is determined by the spatial relation configuration (e.g., beam). If no spatial relation is provided or the same spatial relation is provided, the two SRS resources can be transmitted simultaneously. In another example, whether SRS resources from two sets of CB / NCB can be transmitted simultaneously is determined by the usage / type of the SRSs. If the usage / type of the two SRS resource sets are the same, the two SRS resource sets can be transmitted simultaneously. In yet another example, whether SRS resources from two SRS resource sets of CB / NCB can be transmitted simultaneously is determined by the time domain behavior of the SRSs. If the time domain behavior of the two SRS resource sets are the same, the two SRS resource sets can be transmitted simultaneously. The spatial relation, usage / type, and time domain behavior can be combined to define simultaneous transmission based on multiple conditions.

[0086] Figure 7 An example communication procedure 700 between a wireless device and a network device according to embodiments disclosed herein is shown. At step S702, the network device transmits control signaling to the wireless device. The control signaling indicates whether to drop all symbols of another SRS of at least two SRSs or only drop overlapping symbols if SRS resource of the at least two SRSs partially overlap. At step S702, the wireless device transmits one SRS of the at least two SRSs and drops another SRS of the at least two SRSs according to the control signaling.

[0087] Figure 8 An example communication procedure 800 between a wireless device and a network device according to embodiments disclosed herein is shown. At step S802, the wireless device transmits capability information to the network device. The capability information can indicate whether the wireless device allows simultaneous transmission of SRSs. At step S804, the network device configures the wireless device based on the received capability information. For example, if the wireless device does not allow simultaneous transmission, the network device does not configure SRS resources for the wireless device for simultaneous transmission. If the wireless device allows simultaneous transmission, the network device can configure SRS resources for the wireless device for simultaneous transmission.

[0088] Embodiments contemplated herein include a wireless device comprising: at least one antenna; and a processor; wherein the wireless device is configured to: determine whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that the simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmit the at least two SRSs; and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, then transmit one of the at least two SRSs and drop the other of the at least two SRSs.

[0089] In some embodiments of the disclosure, the wireless device is further configured to determine that the simultaneous transmission of the at least two SRSs is not allowed based on a scheduling restriction.

[0090] In some embodiments of the disclosure, the simultaneous transmission of the at least two SRSs is not allowed and the wireless device is further configured to determine a priority of each of the at least two SRSs, wherein one of the at least two SRSs having a higher priority is transmitted and the other of the at least two SRSs having a lower priority is dropped.

[0091] In some embodiments of the disclosure, the priority is determined by a time domain behavior of each of the at least two SRSs, wherein the time domain behavior is selected from a group comprising at least aperiodic, semi-persistent, and periodic, and wherein a priority of an aperiodic SRS is higher than a priority of a semi-persistent SRS, and a priority of a semi-persistent SRS is higher than a priority of a periodic SRS.

[0092] In some embodiments of the disclosure, the priority is determined by a usage of each of the at least two SRSs, wherein the usage is selected from a group comprising at least codebook (CB), non-codebook (NCB), beam management (BM), and antenna switching (AS), wherein a priority of a CB or NCB SRS is higher than a priority of an AS SRS, and a priority of an AS SRS is higher than a priority of a BM SRS.

[0093] In some embodiments of the disclosure, the priority is determined by a SRS resource set ID or a SRS resource ID associated with each of the at least two SRSs, wherein a priority of a SRS associated with a lower SRS resource set ID or a lower SRS resource ID is higher than a priority of a SRS associated with a higher SRS resource set ID or a higher SRS resource ID.

[0094] In some embodiments of the disclosure, the priority is determined by a serving cell ID associated with each of the at least two SRSs, wherein a priority of an SRS associated with a lower serving cell ID is higher than a priority of an SRS associated with a higher serving cell ID.

[0095] In some embodiments of the disclosure, if SRS resources of the at least two SRSs partially overlap, all symbols of an SRS with a lower priority are dropped.

[0096] In some embodiments of the disclosure, if SRS resources of the at least two SRSs partially overlap, only overlapping symbols of an SRS with a lower priority are dropped.

[0097] In some embodiments of the disclosure, the wireless device is further configured to receive control signaling from a network device, wherein the control signaling indicates whether all symbols of an SRS or only overlapping symbols are dropped if SRS resources of the SRS partially overlap.

[0098] In some embodiments of the disclosure, an SRS with a lower priority is used for one of codebook (CB), non-codebook (NCB), and antenna switching (AS).

[0099] In some embodiments of the disclosure, an SRS with a lower priority is used for beam management (BM).

[0100] In some embodiments of the disclosure, the wireless device is further configured to configure different time domain behaviors for codebook (CB) and non-codebook (NCB) SRSs based on a scheduling restriction.

[0101] In some embodiments of the disclosure, simultaneous transmission of the at least two SRSs is allowed, and the wireless device is further configured to adjust transmission power of the at least two SRSs if a total transmission power of the at least two SRSs exceeds a maximum transmission power, such that the total transmission power does not exceed the maximum transmission power.

[0102] In some embodiments of the disclosure, transmission power of each of the at least two SRSs is adjusted to a same transmission power.

[0103] In some embodiments of the disclosure, transmission power of each of the at least two SRSs is adjusted by a common adjustment factor.

[0104] In some embodiments of the disclosure, transmission power of an SRS with a lower priority of the at least two SRSs is reduced.

[0105] In some embodiments of the disclosure, the wireless device is further configured to transmit, to the network device, capability information of the wireless device regarding simultaneous transmission of SRSs for different cases, respectively.

[0106] In some embodiments of the disclosure, the wireless device is further configured to transmit, to the network device, capability information regarding simultaneous transmission of the at least two SRSs via a MAC control element (CE) or uplink control information (UCI).

[0107] In some embodiments of the disclosure, simultaneous transmission of the at least two SRSs is allowed if one or more of the following configurations of the at least two SRSs are the same: spatial relation; usage; or time domain behavior.

[0108] Embodiments contemplated herein include an apparatus comprising means for performing one or more elements of a method comprising: determining whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmitting the at least two SRSs; and if it is determined that simultaneous transmission of the at least two SRSs is not allowed, then transmitting one of the at least two SRSs and dropping the other of the at least two SRSs. The apparatus can be, for example, an apparatus of a UE (such as wireless device 202 as a UE, as described herein).

[0109] Embodiments contemplated herein include one or more non-transitory computer- readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of a method comprising: determining whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmitting the at least two SRSs; and if it is determined that simultaneous transmission of the at least two SRSs is not allowed, then transmitting one of the at least two SRSs and dropping the other of the at least two SRSs. The non-transitory computer-readable medium can be, for example, a memory of a UE (such as memory 206 of wireless device 202 as a UE, as described herein).

[0110] Embodiments contemplated herein include an apparatus comprising logic, means, or circuitry for performing one or more elements of a method comprising determining whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed, if it is determined that the simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmitting the at least two SRSs, and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, then transmitting one of the at least two SRSs and dropping the other of the at least two SRSs. The apparatus can be, for example, an apparatus of a UE (such as wireless device 202 as a UE, as described herein).

[0111] Embodiments contemplated herein include an apparatus comprising: one or more processors and 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 a method comprising determining whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed, if it is determined that the simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmitting the at least two SRSs, and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, then transmitting one of the at least two SRSs and dropping the other of the at least two SRSs. The apparatus can be, for example, an apparatus of a UE (such as wireless device 202 as a UE, as described herein).

[0112] Embodiments contemplated herein include a signal as described in or related to one or more elements of a method comprising determining whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed, if it is determined that the simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmitting the at least two SRSs, and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, then transmitting one of the at least two SRSs and dropping the other of the at least two SRSs.

[0113] Embodiments contemplated herein include a computer program or computer program product comprising instructions, where execution of the program by a processor is to cause the processor to perform one or more elements of the method comprising: determining whether simultaneous transmission of at least two sounding reference signals (SRSs) is allowed; if it is determined that the simultaneous transmission of the at least two SRSs is allowed, then simultaneously transmitting the at least two SRSs; and if it is determined that the simultaneous transmission of the at least two SRSs is not allowed, then transmitting one of the at least two SRSs and dropping the other of the at least two SRSs. The processor can 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, for example, be located in the processor of the UE and / or on a memory (such as the memory 206 of the wireless device 202 as a UE, as described herein).

[0114] Embodiments contemplated herein include a network device comprising: at least one antenna; and a processor; wherein the network device is configured to: transmit control signaling to a wireless device; and receive one of at least two SRSs from the wireless device, wherein the other of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap.

[0115] In some embodiments of the disclosure, the network device receives, from the wireless device, capability information of the wireless device regarding simultaneous transmission of SRSs for different cases, respectively.

[0116] Embodiments contemplated herein include an apparatus comprising means for performing one or more elements of the method comprising: transmitting control signaling to a wireless device; and receiving one of at least two SRSs from the wireless device, wherein the other of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap. The apparatus can be, for example, an apparatus of a base station (such as the network device 218 as a base station, as described herein).

[0117] Embodiments contemplated herein include one or more non-transitory computer- readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of a method comprising: transmitting control signaling to a wireless device; and receiving one of at least two SRSs from the wireless device, wherein another of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap. The non-transitory computer-readable medium can be, for example, a memory of a base station, such as the memory 222 of the network device 218 as a base station, as described herein.

[0118] Embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry to perform one or more elements of a method comprising: transmitting control signaling to a wireless device, wherein the scheduling restriction indicates that simultaneous transmission of sounding reference signals (SRSs) at the wireless device is not allowed; and receiving one of at least two SRSs from the wireless device, wherein another of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap. The apparatus can be, for example, an apparatus of a base station, such as the network device 218 as a base station, as described herein.

[0119] Embodiments contemplated herein include an apparatus comprising: one or more processors and 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 a method comprising: transmitting control signaling to a wireless device; and receiving one of at least two SRSs from the wireless device, wherein another of the at least two SRSs is dropped by the wireless device, wherein the control signaling indicates whether all symbols of the other of the at least two SRSs are dropped or only overlapping symbols are dropped if SRS resources of the at least two SRSs partially overlap. The apparatus can be, for example, an apparatus of a base station, such as the network device 218 as a base station, as described herein.

[0120] An embodiment contemplated herein includes a signal as described in or associated with one or more elements of the method, the method comprising: transmitting control signaling to a wireless device; and receiving from the wireless device one of at least two SRSs, wherein the other of the at least two SRSs is discarded by the wireless device, wherein the control signaling indicates whether to discard all symbols of the other of the at least two SRSs or only discard overlapping symbols if the SRS resources of the at least two SRSs partially overlap.

[0121] The embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution of the program by a processing element will cause the processing element to perform one or more elements of the method, the method comprising: transmitting control signaling to a wireless device; and receiving from the wireless device one of at least two SRSs, wherein the other of the at least two SRSs is discarded by the wireless device, wherein the control signaling indicates whether to discard all symbols of the other of the at least two SRSs or only discard overlapping symbols if the SRS resources of the at least two SRSs partially overlap. 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, for example, reside in the processor and / or memory of the UE (such as memory 222 of network device 218 as a base station, as described herein).

[0122] For one or more embodiments, at least one of the components shown in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, the baseband processor described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more examples of the examples described herein. Similarly, the circuitry associated with the UE, base station, network element, etc., described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more examples of the examples shown herein.

[0123] 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 embodiments 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 teachings above, modifications and variations are possible, or modifications and variations may be derived from practice of various embodiments.

[0124] Embodiments and implementations of the systems and methods described herein can include various operations, which can be reflected in machine-executable instructions to be executed by a computer system. The computer system can include one or more general- or special-purpose computers (or other electronic devices). The computer system can include hardware components that include specific logic for performing the operations, or can include a combination of hardware, software, and / or firmware.

[0125] It should be recognized that the systems described herein include descriptions of specific embodiments. These embodiments can be combined into a single system, incorporated into other systems, divided into multiple systems, or otherwise divided or combined. Further, it is contemplated that parameters, attributes, aspects, etc. of one embodiment can be used in another embodiment. For clarity, these parameters, attributes, aspects, etc. are only described in one or more embodiments, and it should be recognized that these parameters, attributes, aspects, etc. can be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment unless specifically stated otherwise herein.

[0126] It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled in a way that minimizes risks to the privacy of the users and is used only for authorized purposes.

[0127] While the foregoing has been described in some detail for purposes of clarity, it will be apparent that certain changes and modifications can be made without departing from the principles thereof. It should be noted that there are many alternative ways of implementing both the processes and apparatuses described herein. Accordingly, embodiments of the present application are to be considered as illustrative and not restrictive, and the description is not to be limited to the details given herein, but can be modified within the scope and equivalents of the appended claims.

Claims

1. A wireless device, the wireless device comprising: At least one antenna; and processor; The wireless device is configured as follows: Determine whether simultaneous transmission of at least two sounding reference signals (SRS) is permitted; If it is determined that simultaneous transmission of the at least two SRSs is permitted, then the at least two SRSs are transmitted simultaneously. as well as If it is determined that simultaneous transmission of the at least two SRSs is not permitted, then: Determine the priority of each of the at least two SRSs; as well as Transmit the SRS with the higher priority among the at least two SRSs, and discard the other SRS with the lower priority among the at least two SRSs. If the SRS resources of the at least two SRSs partially overlap, the determination is made based on the use of the other SRS with the lower priority: whether to discard all symbols of the other SRS with the lower priority or only discard the overlapping symbols of the other SRS with the lower priority.

2. The wireless device according to claim 1, wherein the wireless device is further configured to: The scheduling constraints determine that simultaneous transmission of at least two SRSs is not permitted.

3. The wireless device of claim 1, wherein the priority is determined by the temporal behavior of each of the at least two SRSs, wherein the temporal behavior is selected from at least the group comprising aperiodic, semi-persistent, and periodic, and wherein the priority of the aperiodic SRS is higher than the priority of the semi-persistent SRS, and the priority of the semi-persistent SRS is higher than the priority of the periodic SRS.

4. The wireless device of claim 1, wherein the priority is determined by the purpose of each of the at least two SRSs, wherein the purpose is selected from the group comprising at least codebook (CB), non-codebook (NCB), beam management (BM), and antenna switching (AS), wherein the SRS used for CB or NCB has a higher priority than the SRS used for AS, and the SRS used for AS has a higher priority than the SRS used for BM.

5. The wireless device of claim 1, wherein the priority is determined by an SRS resource set ID or SRS resource ID associated with each of the at least two SRSs, wherein the SRS associated with a lower SRS resource set ID or lower SRS resource ID has a higher priority than the SRS associated with a higher SRS resource set ID or higher SRS resource ID.

6. The wireless device of claim 1, wherein the priority is determined by the serving cell ID associated with each of the at least two SRSs, wherein the SRS associated with the lower serving cell ID has a higher priority than the SRS associated with the higher serving cell ID.

7. The wireless device according to claim 1, wherein the wireless device is further configured to: Receive control signaling from the network device, wherein the control signaling indicates whether to discard all symbols of the SRS or only the overlapping symbols if the SRS resources partially overlap.

8. The wireless device of claim 1, wherein if the purpose of the other SRS having a lower priority is one of codebook (CB), non-codebook (NCB), and antenna switching (AS), then all symbols of the other SRS having a lower priority are discarded.

9. The wireless device of claim 1, wherein if the purpose of the other SRS with lower priority is beam management (BM), then only the overlapping symbols of the other SRS with lower priority are discarded.

10. The wireless device of claim 3, wherein the wireless device is further configured to: Different time-domain behaviors are configured for SRS used for codebook (CB) and non-codebook (NCB) based on scheduling constraints.

11. The wireless device of claim 1, wherein simultaneous transmission of the at least two SRSs is permitted, and the wireless device is further configured to: If the total transmission power of the at least two SRSs exceeds the maximum transmission power, the transmission power of the at least two SRSs is adjusted so that the total transmission power does not exceed the maximum transmission power.

12. The wireless device of claim 11, wherein the transmission power of each of the at least two SRSs is adjusted to the same transmission power.

13. The wireless device of claim 11, wherein the transmission power of each of the at least two SRSs is adjusted by a common adjustment factor.

14. The wireless device of claim 11, wherein the transmission power of the SRS having the lower priority among the at least two SRSs is reduced.

15. The wireless device of claim 1, wherein the wireless device is further configured to: Transmit to the network device information about the wireless device's ability to simultaneously transmit SRS for different situations.

16. The wireless device of claim 1, wherein the wireless device is further configured to: Information regarding the ability to transmit the at least two SRSs simultaneously is transmitted to the network device via a MAC control element (CE) or uplink control information (UCI).

17. The wireless device of claim 1, wherein simultaneous transmission of the at least two SRSs is permitted if one or more of the following configurations of the at least two SRSs are identical: Spatial relationships; Purpose; or Temporal behavior.

18. A method performed by a wireless device, the method comprising: Determine whether simultaneous transmission of at least two sounding reference signals (SRS) is permitted; If it is determined that simultaneous transmission of the at least two SRSs is permitted, then the at least two SRSs are transmitted simultaneously. as well as If it is determined that simultaneous transmission of the at least two SRSs is not permitted, then: Determine the priority of each of the at least two SRSs; as well as Transmit the SRS with the higher priority among the at least two SRSs, and discard the other SRS with the lower priority among the at least two SRSs. If the SRS resources of the at least two SRSs partially overlap, the determination is made based on the use of the other SRS with the lower priority: whether to discard all symbols of the other SRS with the lower priority or only discard the overlapping symbols of the other SRS with the lower priority.

19. A non-transitory computer-readable storage medium having instructions stored thereon, the instructions causing a wireless device to: Determine whether simultaneous transmission of at least two sounding reference signals (SRS) is permitted; If it is determined that simultaneous transmission of the at least two SRSs is permitted, then the at least two SRSs are transmitted simultaneously. as well as If it is determined that simultaneous transmission of the at least two SRSs is not permitted, then: Determine the priority of each of the at least two SRSs; as well as Transmit the SRS with the higher priority among the at least two SRSs, and discard the other SRS with the lower priority among the at least two SRSs. If the SRS resources of the at least two SRSs partially overlap, the determination is made based on the use of the other SRS with the lower priority: whether to discard all symbols of the other SRS with the lower priority or only discard the overlapping symbols of the other SRS with the lower priority.

20. A computer program product comprising instructions stored thereon, the instructions causing a wireless device, when executed by a processor: Determine whether simultaneous transmission of at least two sounding reference signals (SRS) is permitted; If it is determined that simultaneous transmission of the at least two SRSs is permitted, then the at least two SRSs are transmitted simultaneously. as well as If it is determined that simultaneous transmission of the at least two SRSs is not permitted, then: Determine the priority of each of the at least two SRSs; as well as Transmit the SRS with the higher priority among the at least two SRSs, and discard the other SRS with the lower priority among the at least two SRSs. If the SRS resources of the at least two SRSs partially overlap, the determination is made based on the use of the other SRS with the lower priority: whether to discard all symbols of the other SRS with the lower priority or only discard the overlapping symbols of the other SRS with the lower priority.

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