Time division multiplexing sounding reference signal port

Abstract

The present disclosure relates to techniques for a time division multiplexed sounding reference signal port in a wireless communication system. A wireless link may be established between a wireless device and a cellular base station. A wireless device may be configured to perform sounding reference signal transmission using a time division multiplexed sounding reference signal port. A maximum transmit power for a wireless device for sounding reference signal transmission may be determined based at least in part on a time division multiplexed sounding reference signal port. A transmit power for sounding reference signal transmission may be selected based at least in part on a maximum transmit power of a wireless device for sounding reference signal transmission. The sounding reference signal transmission may be performed using the selected transmission power.

Description

Technical Field

[0001] This application relates to wireless communication, and more specifically to systems, apparatus, and methods for using time-division multiplexing probe reference signal ports in wireless communication systems. Related technical descriptions

[0002] The use of wireless communication systems is growing rapidly. In recent years, wireless devices, such as smartphones and tablets, have become increasingly sophisticated. In addition to supporting telephone calls, many mobile devices (i.e., user equipment or UE) now offer access to the internet, email, text messaging, and navigation using the Global Positioning System (GPS), and are capable of operating complex applications that utilize these functionalities. Additionally, many different wireless communication technologies and standards exist. Some examples of wireless communication standards include GSM, UMTS (e.g., associated with WCDMA or TD-SCDMA air interfaces), LTE, LTE-A (LTE-Advanced), NR, HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), IEEE 802.11 (WLAN or Wi-Fi), and Bluetooth. ™ wait.

[0003] The increasing number of features and functionalities introduced into wireless communication devices has created a continuous demand for improvements in both wireless communication and the devices themselves. Specifically, it is crucial to ensure the accuracy of signals transmitted and received by user equipment (UE) devices, such as wireless devices like cellular phones, base stations, and relay stations used in wireless cellular communications. Furthermore, increasing the functionality of UE devices can significantly strain their battery life. Therefore, it is equally important to reduce the power requirements in UE device design while allowing them to maintain good transmit and receive capabilities for improved communication. Thus, improvements are expected in this area. Summary of the Invention

[0004] This article presents implementation schemes for apparatus, systems, and methods for supporting time-division multiplexing probe reference signal ports in wireless communication systems.

[0005] This paper describes techniques for determining the transmit power for probe reference signal transmissions utilizing time-division multiplexing probe reference signal ports. These techniques take into account the possibility that, for example, the maximum transmit power of the wireless device may be reduced for such transmissions due to the use of only a subset of the wireless device's antenna ports in each symbol of the probe reference signal transmission, depending on the wireless device architecture, the type of probe reference signal transmission, and / or any of various other possible considerations.

[0006] This paper also describes techniques for implementing certain constraints on probe reference signal transmission using time-division multiplexing probe reference signal ports, such as to support efficient and effective operation. Furthermore, this paper describes various possible probe reference signal collision handling techniques, and techniques for configuring wireless devices using one of these possible techniques.

[0007] It should be noted that the technologies described herein can be implemented in and / or used in a variety of different types of devices, including but not limited to base stations, access points, cellular phones, portable media players, tablet computers, wearable devices, unmanned aerial vehicles, unmanned flight controllers, automobiles and / or motor vehicles, and various other computing devices.

[0008] The present invention is intended to provide a brief overview of some of the subjects described in this document. Therefore, it should be understood that the above features are merely illustrative and should not be construed as narrowing the scope or substance of the subjects described herein in any way. Other features, aspects, and advantages of the subjects described herein will become apparent from the following detailed description, drawings, and claims. Attached Figure Description

[0009] A better understanding of the subject matter can be obtained by considering the following detailed description of various embodiments in conjunction with the accompanying drawings, in which:

[0010] Figure 1 Exemplary (and simplified) wireless communication systems according to some implementation schemes are illustrated;

[0011] Figure 2 An exemplary base station communicating with an exemplary wireless user equipment (UE) device according to some implementation schemes is illustrated;

[0012] Figure 3 Exemplary block diagrams of a UE according to some implementation schemes are shown;

[0013] Figure 4 Exemplary block diagrams of base stations according to some implementation schemes are shown;

[0014] Figure 5 This is a flowchart illustrating various aspects of exemplary possible methods for time-division multiplexing probe reference signal ports in wireless communication systems, according to some implementation schemes;

[0015] Figure 6 Example aspects of possible comb-like structures with a comb tooth value of 4 according to some implementation schemes are illustrated;

[0016] Figure 7An example aspect of a possible time-division multiplexed probe reference signal port configuration according to some implementation schemes is illustrated; and

[0017] Figure 8 Examples of various possible conflict handling options are illustrated according to some implementation schemes when the probe reference signal port is time-division multiplexed.

[0018] While the features described herein are susceptible to various modifications and alternatives, specific embodiments thereof are illustrated by way of example in the accompanying drawings and described in detail herein. However, it should be understood that the drawings and their detailed description are not intended to limit one to the specific forms disclosed, but rather to cover all modifications, equivalents, and alternatives falling within the substance and scope of the subject matter as defined by the appended claims. Detailed Implementation

[0019] acronym

[0020] Various acronyms are used throughout this disclosure. Definitions of the most frequently used acronyms that may appear throughout this disclosure are provided below:

[0021] •UE: User Equipment

[0022] •RF: Radio Frequency

[0023] •BS: Base Station

[0024] •GSM: Global System for Mobile Communications

[0025] • UMTS: Universal Mobile Telecommunication System

[0026] •LTE: Long Term Evolution

[0027] •NR: New Radio

[0028] •TX: Send

[0029] •RX: Receive

[0030] •RAT: Radio Access Technology

[0031] •TRP: Transmitter / Receiver Point

[0032] the term

[0033] The following is a glossary of terms that may appear in this disclosure:

[0034] memory media—Any of various types of nontransitory memory devices or storage devices. The term "memory medium" is intended to include mounting media, such as CD-ROMs, floppy disks, or magnetic tape devices; computer system memory or random access memory, such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-volatile memory, such as flash memory; magnetic media, such as hard disk drives or optical storage devices; registers or other similar types of memory elements, etc. Memory media may also include other types of nontransitory memory or combinations thereof. Furthermore, the memory medium may reside in a first computer system executing a program, or it may reside in a different second computer system connected to the first computer system via a network such as the Internet. In the latter case, the second computer system may provide program instructions to the first computer system for execution. The term "memory medium" may include two or more memory media, which may reside in different locations in different computer systems connected via, for example, a network. The memory medium may store program instructions (e.g., embodied in a computer program) that can be executed by one or more processors.

[0035] carrier medium —Memory media as described above, and physical transmission media, such as buses, networks and / or other physical transmission media for transmitting signals (such as electrical signals, electromagnetic signals or digital signals).

[0036] Computer system (or computer) —Any of any type of computing or processing system, including personal computer systems (PCs), mainframe computer systems, workstations, network appliances, internet-connected appliances, personal digital assistants (PDAs), television systems, grid computing systems, or other devices or combinations thereof. Generally speaking, the term "computer system" can be broadly defined as any device (or combination of devices) that includes at least one processor that executes instructions from a memory medium.

[0037] User Equipment (UE) (or "UE device") —Any of various types of computer systems or devices that are mobile or portable and perform wireless communication. Examples of UE devices include mobile phones or smartphones (e.g., iPhone). ™ Based on Android ™ Telephones), tablet computers (e.g., iPads) ™ Samsung Galaxy ™ ), portable gaming devices (e.g., Nintendo DS) ™ PlayStation Portable ™ Gameboy Advance ™ iPhone™ Wearable devices (e.g., smartwatches, smart glasses), laptops, PDAs, portable internet devices, music players, data storage devices, other handheld devices, automobiles and / or motor vehicles, unmanned aerial vehicles (UAVs) (e.g., drones), UAV controllers (UACs), etc. Generally speaking, the term "UE" or "UE device" can be broadly defined to encompass any electronic device, computing device, and / or telecommunications device (or a combination of these devices) that is easily transportable by the user and capable of wireless communication.

[0038] wireless devices —Any of various types of computer systems or devices that perform wireless communication. Wireless devices can be portable (or mobile), or they can be stationary or fixed in a location. UE is an example of a wireless device.

[0039] Communication equipment —Any of various types of computer systems or devices that perform communication, where the communication can be wired or wireless. The communication device can be portable (or mobile), or it can be stationary or fixed in a location. A wireless device is one example of a communication device. A UE is another example of a communication device.

[0040] Base station (BS) The term “base station” has the full range of its usual meaning and includes at least a wireless communication station that is installed in a fixed location and used for communication as part of a wireless telephone system or radio system.

[0041] Processing element (or processor) —Refers to various elements or combinations of elements capable of performing the functions in a device (e.g., user equipment equipment or cellular network equipment). Processing elements may include, for example: processors and associated memory, portions or circuitry of individual processor cores, entire processor cores, processor arrays, circuitry (such as ASICs (Application-Specific Integrated Circuits)), programmable hardware elements (such as field-programmable gate arrays (FPGAs)), and any combination of the various combinations described above.

[0042] Wi-Fi The term "Wi-Fi" has the full range of its usual meaning and includes at least a wireless communication network or RAT that is served by and provides connectivity to the Internet through wireless LAN (WLAN) access points. Most modern Wi-Fi networks (or WLAN networks) are based on the IEEE 802.11 standard and are marketed under the name "Wi-Fi". Wi-Fi (WLAN) networks are different from cellular networks.

[0043] AutomaticallyAutomatic means that an action or operation is performed automatically by a computer system (e.g., software executed by the computer system) or device (e.g., circuits, programmable hardware elements, ASICs, etc.) without requiring direct specification or execution of the action or operation through user input. Therefore, the term "automatically" is the opposite of an operation performed or specified manually by a user, where the user provides input to directly perform the operation. An automatic process can be initiated by user-provided input, but the subsequent actions performed "automatically" are not specified by the user; that is, they are not performed "manually," where the user specifies each action to be performed. For example, a user filling out a form by selecting each field and providing input specifying information (e.g., by typing information, selecting a checkbox, radio selection, etc.) is considered manually filling out the form, even though the computer system must update the form in response to the user's actions. The form can be automatically filled out by a computer system (e.g., software executed on the computer system) which analyzes the fields of the form and fills it out without any user input specifying answers for the fields. As indicated above, the user can invoke the automatic filling of the form but does not participate in the actual filling of the form (e.g., the user does not manually specify answers for the fields, but they are completed automatically). This manual provides various examples of operations that can be performed automatically in response to actions taken by the user.

[0044] Configured as —Various components can be described as being “configured” to perform one or more tasks. In this context, “configured” is a broad expression generally meaning “having” a “structure” that performs one or more tasks during operation. Therefore, a component can be configured to perform a task even when it is not currently performing one (e.g., a set of electrical conductors can be configured to electrically connect one module to another, even when the two modules are not connected). In some contexts, “configured” can be a broad expression generally meaning a structure that “has” a “circuit” that performs one or more tasks during operation. Therefore, a component can be configured to perform a task even when it is not currently powered on. Generally, the circuit forming the structure corresponding to “configured” can include hardware circuitry.

[0045] For ease of description, various components may be described as performing one or more tasks. Such descriptions should be interpreted as including the phrase "configured to". Statements describing a component as configured to perform one or more tasks are expressly intended not to invoke the interpretation of 35 U.S.C., 112(6).

[0046] Figure 1 and Figure 2 —Exemplary Communication System

[0047] Figure 1 Exemplary (and simplified) wireless communication systems that implement various aspects of this disclosure according to some embodiments are illustrated. It should be noted that... Figure 1The system described is merely one example of a possible system, and this implementation can be carried out in any system of various types as needed.

[0048] As shown in the figure, this exemplary wireless communication system includes a base station 102 that communicates with one or more (e.g., any number) user equipments 106A, 106B, etc., to 106N via a transmission medium. Each user equipment may be referred to herein as a “user equipment” (UE) or a UE device. Therefore, user equipment 106 is referred to as a UE or a UE device.

[0049] Base station 102 may be a transceiver base station (BTS) or a cell site, and may include hardware and / or software for enabling wireless communication with UEs 106A to 106N. If base station 102 is implemented in the context of LTE, it may alternatively be referred to as an "eNodeB" or "eNB". If base station 102 is implemented in the context of 5G NR, it may alternatively be referred to as a "gNodeB" or "gNB". Base station 102 may also be equipped to communicate with network 100 (e.g., the core network of a cellular service provider, telecommunications networks such as the Public Switched Telephone Network (PSTN), and / or the Internet, and various other possibilities). Therefore, base station 102 facilitates communication between user equipments and / or between user equipments and network 100. The communication area (or coverage area) of a base station may be referred to as a "cell". Also as used herein, in relation to a UE, a base station may sometimes be considered to represent the network, taking into account both uplink and downlink communication of the UE. Therefore, a UE communicating with one or more base stations in the network may also be understood as a UE communicating with the network.

[0050] It should be noted that, at least in some 3GPP NR contexts, base station (gNB) functionality can be split between centralized unit (CU) and distributed unit (DU). At least according to some implementations, in such network deployment contexts, the illustrated base station 102 may support the functionality of either or both of the CU or DU. In some cases, base station 102 may be configured to act as an Integrated Access and Backhaul (IAB) donor (e.g., including IAB donor CU and / or IAB donor DU functionality). In some cases, base station 102 may be configured to act as an IAB node (e.g., including IAB mobile terminal (MT) and IAB-DU functionality). Other specific implementations are also possible.

[0051] Base station 102 and user equipment can be configured to communicate via a transmission medium using any of a variety of radio access technologies (RATs), also known as wireless communication technologies or telecommunications standards, such as GSM, UMTS (WCDMA), LTE, LTE-A Advanced, LAA / LTE-U, 5G NR, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), Wi-Fi, etc.

[0052] Base station 102 and other similar base stations operating according to the same or different cellular communication standards may thus provide, as one or more cell networks, continuous or near-continuous overlapping services to UE 106 and similar devices over a geographic area via one or more cellular communication standards.

[0053] It should be noted that UE 106 may be capable of communicating using multiple wireless communication standards. For example, UE 106 may be configured to communicate using either or both of the 3GPP cellular communication standards or the 3GPP2 cellular communication standards. In some implementations, UE 106 may be configured to perform techniques such as time-division multiplexing probe reference signal ports for wireless communication systems, according to the various methods described herein. UE 106 may also be configured, or alternatively configured, to use WLAN, Bluetooth, etc. ™ It can communicate with one or more Global Navigation Satellite Systems (GNSS, such as GPS or GLONASS), one and / or more mobile television broadcasting standards (e.g., ATSC-M / H), etc. Other combinations of wireless communication standards (including more than two wireless communication standards) are also possible.

[0054] Figure 2Exemplary user equipment 106 (e.g., one of devices 106A to 106N) communicating with base station 102 according to some embodiments is illustrated. UE 106 can be a device with wireless network connectivity, such as a mobile phone, handheld device, wearable device, computer or tablet computer, unmanned aerial vehicle (UAV), unmanned aerial controller (UAC), automobile, or virtually any type of wireless device. UE 106 may include a processor (processing element) configured to execute program instructions stored in memory. UE 106 can perform any method embodiment of the method embodiments described herein by executing such stored instructions. Alternatively or additionally, UE 106 may include programmable hardware elements, such as field-programmable gate arrays (FPGAs), integrated circuits, and / or any of a variety of other possible hardware components configured to (e.g., individually or in combination) perform any method embodiment of the method embodiments described herein or any part thereof. UE 106 may be configured to communicate using any of a plurality of wireless communication protocols. For example, UE 106 can be configured to communicate using two or more of CDMA2000, LTE, LTE-A, 5G NR, WLAN, or GNSS. Other combinations of wireless communication standards are also possible.

[0055] UE 106 may include one or more antennas communicating using one or more wireless communication protocols according to one or more RAT standards. In some embodiments, UE 106 may share one or more portions of the receive chain and / or transmit chain among multiple wireless communication standards. Shared radio components may include a single antenna, or may include multiple antennas (e.g., for a multiple-input multiple-output or "MIMO" antenna system) for performing wireless communication. Generally, radio components may include any combination of baseband processors, analog RF signal processing circuitry (e.g., including filters, mixers, oscillators, amplifiers, etc.) or digital processing circuitry (e.g., for digital modulation and other digital processing). Similarly, radio components may use the aforementioned hardware to implement one or more receive chains and transmit chains. For example, UE 106 may share one or more portions of the receive chain and / or transmit chain among multiple wireless communication technologies (such as those discussed above).

[0056] In some implementations, UE 106 may include any number of antennas and may be configured to use the antennas to transmit and / or receive directional radio signals (e.g., beams). Similarly, BS 102 may also include any number of antennas and may be configured to use the antennas to transmit and / or receive directional radio signals (e.g., beams). To receive and / or transmit such directional signals, the antennas of UE 106 and / or BS 102 may be configured to apply different “weights” to different antennas. The process of applying these different weights may be referred to as “pre-decoding”.

[0057] In some implementations, UE 106 may include independent transmit and / or receive chains (e.g., including independent antennas and other radio components) for each wireless communication protocol configured to communicate therewith. As another possibility, UE 106 may include one or more radio components shared among multiple wireless communication protocols, as well as one or more radio components uniquely used by a single wireless communication protocol. For example, UE 106 may include shared radio components for communication using either LTE or CDMA2000 1xRTT (or LTE or NR, or LTE or GSM), and for communication using Wi-Fi and Bluetooth. ™ Each component communicates independently. Other configurations are also possible.

[0058] Figure 3 — Block diagram of an exemplary UE device

[0059] Figure 3 A block diagram of an exemplary UE 106 according to some embodiments is illustrated. As shown, UE 106 may include a system-on-chip (SOC) 300, which may include portions for various purposes. Some or all of the various illustrated components (and / or other device components not illustrated, e.g., in variants and alternative arrangements) may be “communically coupled” or “operationally coupled”, terms which may be used herein to refer to components that can communicate directly or indirectly when the device is in operation.

[0060] As shown in the figure, SOC 300 may include display circuitry 304 and one or more processors 302. The display circuitry performs graphics processing and provides display signals to a display 360, while the processors execute program instructions for UE 106. SOC 300 may also include sensor circuitry 370, which may include components for sensing or measuring any of a variety of possible characteristics or parameters of UE 106. For example, sensor circuitry 370 may include motion sensing circuitry configured to detect motion of UE 106, for example, using a gyroscope, accelerometer, and / or any of a variety of other motion sensing components. As another possibility, sensor circuitry 370 may include one or more temperature sensing components, for example, for measuring the temperature of each of one or more antenna panels and / or other components of UE 106. As needed, any of a variety of other possible types of sensor circuitry may also or alternatively be included in UE 106. Processor 302 may also be coupled to memory management unit (MMU) 340, which may be configured to receive addresses from processor 302 and translate those addresses into locations in memory (e.g., memory 306, read-only memory (ROM) 350, NAND flash memory 310) and / or other circuitry or devices, such as display circuitry 304, radio components 330, connector I / F 320, and / or display 360. MMU 340 may be configured to perform memory protection and page table translation or setup. In some embodiments, MMU 340 may be included as part of processor 302.

[0061] As shown in the figure, the SOC 300 can be coupled to various other circuits of the UE 106. For example, the UE 106 may include various types of memory (e.g., including NAND flash memory 310), connector interface 320 (e.g., for coupling to computer systems, docking stations, charging stations, etc.), display 360, and wireless communication circuitry 330 (e.g., for LTE, LTE-A, NR, CDMA2000, Bluetooth). ™(e.g., Wi-Fi, GPS, etc.). UE device 106 may include or be coupled to at least one antenna (e.g., 335a), and may include multiple antennas (e.g., illustrated by antennas 335a and 335b) for performing wireless communication with a base station and / or other devices. Antennas 335a and 335b are shown by way of example, and UE device 106 may include fewer or more antennas. In general, one or more antennas are collectively referred to as antenna 335. For example, UE device 106 may use antenna 335 to perform wireless communication via radio circuitry 330. The communication circuitry may include multiple receive chains and / or multiple transmit chains for receiving and / or transmitting multiple spatial streams, such as in a multiple-input multiple-output (MIMO) configuration. As indicated above, in some embodiments, the UE may be configured to perform wireless communication using multiple wireless communication standards.

[0062] UE 106 may include hardware and software components, such as those described further herein, for implementing methods for UE 106 to perform time-division multiplexing probe reference signal ports in a wireless communication system. The processor 302 of UE device 106 may be configured to implement some or all of the methods described herein, for example, by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). In other embodiments, processor 302 may be configured as a programmable hardware element, such as a FPGA (Field-Programmable Gate Array), or as an ASIC (Application-Specific Integrated Circuit). Furthermore, processor 302 may be coupled to, for example, Figure 3 The other components shown and / or interoperable with other components can perform techniques for time-division multiplexing probe reference signal ports in wireless communication systems, according to the various embodiments disclosed herein. Processor 302 can also implement various other applications and / or end-user applications running on UE 106.

[0063] In some implementations, radio component 330 may include a separate controller dedicated to controlling communications for various corresponding RAT standards. For example, such as Figure 3 As shown, the radio component 330 may include a Wi-Fi controller 352, a cellular controller (e.g., an LTE and / or LTE-A controller) 354, and Bluetooth. ™ Controller 356, and in at least some embodiments, one or more of these controllers may be implemented as corresponding integrated circuits (referred to as ICs or chips), which communicate with each other and with the SOC 300 (and more specifically, with the processor 302). For example, the Wi-Fi controller 352 may communicate with the cellular controller 354 via a cell-ISM link or a WCI interface, and / or Bluetooth. ™Controller 356 can communicate with cellular controller 354 via a cell-ISM link or the like. Although three independent controllers are illustrated within radio component 330, other implementations with fewer or more similar controllers for various different RATs can be implemented in UE device 106.

[0064] Furthermore, implementations in which the controller can perform functionality associated with a variety of radio access technologies are envisioned. For example, according to some implementations, in addition to hardware and / or software components for performing cellular communications, the cellular controller 354 may also include hardware and / or software components for performing one or more activities associated with Wi-Fi, such as Wi-Fi preamble detection, and / or the generation and transmission of Wi-Fi physical layer preamble signals.

[0065] Figure 4 — Block diagram of an exemplary base station

[0066] Figure 4 A block diagram of an exemplary base station 102 according to some implementation schemes is shown. It should be noted that... Figure 4 The base station shown is merely one example of a possible base station. As illustrated, base station 102 may include processor 404, which executes program instructions for base station 102. Processor 404 may also be coupled to memory management unit (MMU) 440, which may be configured to receive addresses from processor 404 and translate these addresses into locations in memory (e.g., memory 460 and read-only memory (ROM) 450) or to other circuitry or devices.

[0067] Base station 102 may include at least one network port 470. Network port 470 may be configured to couple to a telephone network and provide access to multiple devices, such as UE device 106, as described above. Figure 1 and Figure 2 Access to the telephone network described herein. Network port 470 (or an additional network port) may also be configured, or alternatively configured, to be coupled to a cellular network, such as the core network of a cellular service provider. The core network may provide mobility-related services and / or other services to multiple devices, such as UE device 106. In some cases, network port 470 may be coupled to the telephone network via the core network, and / or the core network may provide the telephone network (e.g., in other UE devices served by a cellular service provider).

[0068] In some implementations, base station 102 may be a next-generation base station, such as a 5G New Radio (5G NR) base station, or a “gNB”. In such implementations, base station 102 may be connected to a legacy evolved packet core (EPC) network and / or to an NR core (NRC) network. Furthermore, base station 102 may be considered a 5G NR cell and may include one or more transmit and receive points (TRPs). Additionally, UEs capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.

[0069] Base station 102 may include at least one antenna 434, and may include multiple antennas. Antenna 434 may be configured to operate as a wireless transceiver and may also be configured to communicate with UE device 106 via radio component 430. Antenna 434 communicates with radio component 430 via communication link 432. Communication link 432 may be a receive link, a transmit link, or both. Radio component 430 may be designed to communicate via various wireless telecommunications standards, including but not limited to 5G NR, 5G NR SAT, LTE, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, etc.

[0070] Base station 102 can be configured to perform wireless communication using multiple wireless communication standards. In some instances, base station 102 may include multiple radio components that enable base station 102 to communicate according to multiple wireless communication technologies. For example, as one possibility, base station 102 may include an LTE radio component for performing communication according to LTE and a 5G NR radio component for performing communication according to 5G NR. In this case, base station 102 may be able to operate as both an LTE base station and a 5G NR base station. As another possibility, base station 102 may include a multimode radio component capable of performing communication according to any of multiple wireless communication technologies (e.g., 5G NR and Wi-Fi, 5G NR SAT and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.).

[0071] As further described herein, BS 102 may include hardware and software components for implementing or supporting specific implementations of the features described herein. The processor 404 of base station 102 may be configured, for example, to implement and / or support some or all of the specific implementations of the methods described herein by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively, processor 404 may be configured as a programmable hardware element such as a FPGA (Field-Programmable Gate Array), or as an ASIC (Application-Specific Integrated Circuit), or a combination thereof. In the case of certain RATs (e.g., Wi-Fi), base station 102 may be designed as an access point (AP), in which case network port 470 may be implemented to provide access to a wide area network and / or one or more local area networks; for example, it may include at least one Ethernet port, and radio component 430 may be designed to communicate according to the Wi-Fi standard.

[0072] Furthermore, as described herein, processor 404 may include one or more processing elements. Therefore, processor 404 may include one or more integrated circuits (ICs) configured to perform the functions of processor 404. Additionally, each integrated circuit may include circuitry (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of processor 404.

[0073] Furthermore, as described herein, radio component 430 may include one or more processing elements. Therefore, radio component 430 may include one or more integrated circuits (ICs) configured to perform the functions of radio component 430. Additionally, each integrated circuit may include circuitry (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of radio component 430.

[0074] Figure 5 -Time-division multiplexed probe reference signal port

[0075] With the expansion of Sound Reference Signal (SRS) design options in recent 3GPP releases, several possibilities exist regarding both the number of SRS ports configured for SRS transmission and the number of SRS symbols. In some (e.g., existing) configurations, it is possible to carry all SRS ports configured for SRS transmission on each SRS symbol in the SRS transmission. However, at least for some SRS configurations, there may be benefits in supporting Time Division Multiplexing (TDM) for SRS ports used for SRS transmission, for example, enabling the transmission of different SRS ports on different SRS symbols in the SRS transmission.

[0076] When operating using TDM SRS ports, there may be some considerations that differ from those when operating using all SRS ports in each SRS symbol. Therefore, at least in some cases, specifying the technology used to support the TDM SRS ports used for SRS transmission may be beneficial. To illustrate one such set of technologies, Figure 5 This is a flowchart illustrating, according to at least some embodiments, a method for time-division multiplexing probe reference signal port in a wireless communication system.

[0077] Figure 5 The aspects of the method can be implemented by a wireless device, for example, in conjunction with one or more cellular base stations (such as UE 106 and BS 102 shown and described with respect to the various figures herein), or more generally, in conjunction as needed with any of the computer circuits, systems, devices, elements, or components shown in the aforementioned figures. For example, the processor (and / or other hardware) of such a device can be configured to cause the device to perform any combination of the illustrated method elements and / or other method elements.

[0078] It should be noted that, although described in a manner involving the use of communication technologies and / or features associated with 3GPP and / or NR specification documents Figure 5 The method incorporates at least some elements, but this description is not intended to limit the scope of this disclosure and can be used in any suitable wireless communication system as needed. Figure 5 The method encompasses various aspects. In various implementation schemes, some elements of the method shown may be executed simultaneously in a different order than those shown, may be replaced by other method elements, or may be omitted. Additional method elements may also be executed as needed. As shown in the figure, Figure 5 The method can be operated as follows.

[0079] Wireless devices can establish wireless links with cellular base stations. According to some implementations, the wireless link may include a 5G NR-based cellular link. For example, the wireless device may establish a session with an AMF entity of the cellular network via one or more gNBs that provide radio access to the cellular network. Alternatively, the wireless link may include an LTE-based cellular link. For example, the wireless device may establish a session with a mobility management entity of the cellular network via an eNB that provides radio access to the cellular network. Other types of cellular links are also possible according to various implementations, and the cellular network may also, or alternatively, operate according to another cellular communication technology.

[0080] Establishing a radio link may include, at least according to some implementation schemes, establishing an RRC connection with a serving cellular base station. Establishing a first RRC connection may include configuring various parameters for communication between the radio device and the cellular base station, establishing environmental information for the radio device, and / or any of various other possible characteristics, such as establishing an air interface for the radio device to communicate with a cellular network associated with the cellular base station. After establishing an RRC connection, the radio device may operate in an RRC connected state. In some cases, the RRC connection may also be released (e.g., after a period of inactivity relative to data communication), in which case the radio device may operate in an RRC idle state or an RRC inactive state. In some cases, such as due to radio device mobility, changed radio medium conditions, and / or any other possible reasons, the radio device may perform a handover (e.g., when in RRC connected mode) or cell reselection (e.g., when in RRC idle mode or RRC inactive mode) to a new serving cell.

[0081] According to at least some implementations, a wireless device can establish multiple wireless links with multiple TRPs in a cellular network, for example, based on a multi-TRP configuration. In such scenarios, the wireless device can be configured (e.g., via RRC signaling) to have one or more Transmission Control Indicators (TCIs), which may correspond to various beams available for communication with the TRPs. Furthermore, it is possible that the state of one or more configured TCIs can be activated at a specific time by the wireless device's Media Access Control (MAC) control element (CE).

[0082] In at least some instances, establishing a wireless link may include the wireless device providing information about its capabilities. This capability information may include information related to any one of several types of wireless device capabilities.

[0083] In section 502, the wireless device can receive information configuring SRS transmission using a TDM SRS port. SRS transmission can be multi-port SRS transmission, such as 8-port SRS transmission. According to various implementations, SRS transmission can be scheduled by the cellular base station using any configuration signaling of various types of configuration signaling, and can be periodic, semi-persistent, or aperiodic SRS transmission. For example, in some implementations, RRC signaling can be used to provide at least some of the information configuring SRS transmission.

[0084] The configuration of a TDM SRS port used for SRS transmission can include an indication of the TDM factor used for SRS transmission, which may represent the number of SRS symbols on which the SRS port is time-division multiplexed for SRS transmission. Therefore, for an n-port SRS transmission with a TDM factor of s, it is possible that each SRS symbol in the SRS transmission carries n / s SRS ports, where different SRS ports are used for each SRS symbol in the set of s SRS symbols. For example, for an 8-port SRS transmission with a TDM factor of 2, each SRS symbol could use 4 ports. In some cases, instead of signaling the TDM factor, it is possible that, for example, in situations where only one value (e.g., 2) is supported as a possible TDM factor, the network can provide a yes / no type indication (e.g., a 1-bit flag) of whether a TDM SRS port is enabled.

[0085] In some implementations, SRS transmission may include repetition and possible frequency hopping. Configuration of such operation may include providing one or more of a repetition factor R or the number m of SRS symbols configured for SRS transmission. The repetition factor may indicate the number of repetitions of the set of s SRS symbols transmitted at a given frequency before frequency hopping. In at least some cases, it may be required that the total number of SRS symbols configured for SRS transmission be an integer multiple of the TDM factor multiplied by the repetition factor (e.g., m may be an integer multiple of sR). At least according to some implementations, this ensures that the complete set of s SRS symbols can be transmitted in an SRS transmission. It should be noted that in some scenarios (e.g., without a repetition factor), it may be possible that only m is required to be an integer multiple of s, or there may be no such requirement.

[0086] It is possible that SRS transmission is performed for any of a variety of possible purposes (e.g., codebook, non-codebook, antenna switching, beam management, among others), which may affect the selection of which SRS ports are used in each SRS symbol of an SRS transmission utilizing TDM SRS ports. For example, for codebook-based SRS transmission utilizing partially coherent operation, SRS transmission may be performed such that SRS ports from the same coherent SRS port group are used in each symbol of the SRS transmission. In other words, the wireless device may avoid using SRS ports from different coherent SRS port groups for transmission in any given symbol of the SRS transmission. At least according to some implementations, this can help provide more useful information for configuring future codebook-based uplink transmissions utilizing partially coherent operation, and / or may allow for more power-efficient operation (e.g., by avoiding opening the same antenna panel in different SRS symbols in the set of SRS symbols for TDM SRS ports, among other possibilities).

[0087] In section 504, the wireless device may determine the maximum transmit power of the wireless device used for SRS transmission. The maximum transmit power of the wireless device used for SRS transmission may be determined at least in part based on the TDM SRS port configuration used for SRS transmission. For example, if fewer SRS ports than the total number of antenna ports of the wireless device are used in each SRS symbol of the SRS transmission, it is possible that the maximum transmit power of the wireless device used for SRS transmission is less than the maximum transmit power if all antenna ports of the wireless device were used. This may also depend on other wireless device design considerations, such as the number and / or configuration arrangement of the wireless device's power amplifiers (PAs).

[0088] Since the maximum transmit power of a wireless device used for SRS transmission can depend at least in part on wireless device design considerations, it is possible for the wireless device to provide the cellular base station with wireless device capability information that can be used to determine the maximum transmit power of the wireless device used for SRS transmission. For example, the wireless device can provide the cellular base station with one or more incremental maximum transmit power values ​​for a TDM SRS port as wireless device capability information, which can indicate the difference between the basic maximum transmit power for the wireless device (e.g., which may also be explicitly or implicitly indicated in the wireless device capability information) and the maximum transmit power for the wireless device when performing SRS transmission using one or more possible TDM SRS port configurations. As another example, the wireless device can provide wireless device power level information from which the cellular base station can infer one or more maximum transmit power values ​​for the wireless device when performing SRS transmission using one or more possible TDM SRS port configurations.

[0089] In some implementations, it is possible to determine / indicate a single maximum transmit power increment value for a TDM SRS port to cover all SRS transmission scenarios utilizing the TDM SRS port. Alternatively, it is possible to determine / indicate multiple maximum transmit power increment values ​​for a TDM SRS port, which can be applied to different scenarios. For example, it is possible to determine and indicate different maximum transmit power increment values ​​for a TDM SRS port for different SRS resource set uses (such as for SRS transmissions for codebook or antenna switching purposes), for example, because for at least some wireless device architectures / designs, the maximum transmit power increment value for a TDM SRS port may differ for these different uses. As another example, it is possible to determine and indicate different maximum transmit power increment values ​​for a TDM SRS port for different numbers of SRS ports and / or TDM factors, for example, because for at least some wireless device designs, the maximum transmit power increment value for a TDM SRS port may differ depending on how many antenna elements of the wireless device are used for transmission in each SRS symbol of the SRS transmission.

[0090] In some implementations, the cellular base station may receive radio device capability information, determine one or more maximum transmit power values ​​for the radio device used for SRS transmissions utilizing the TDM SRS port, and provide configuration information to the radio device indicating one or more maximum transmit power values ​​for the radio device used for SRS transmissions utilizing the TDM SRS port. In some cases, if the radio device provides multiple maximum transmit power increment values ​​for the TDM SRS port, the cellular base station may determine and indicate a corresponding number of maximum transmit power values ​​for the radio device used for SRS transmissions utilizing the TDM SRS port. It should be noted that other configuration methods are also possible. Such configuration can help ensure that the radio device and the cellular base station determine the transmit power used by the radio device for SRS transmissions in the same way, which may be important for more accurate and efficient use of SRS transmissions to configure subsequent uplink transmissions. Alternatively, it is possible that such explicit configuration is not performed, for example, if the behavior of the cellular base station and the radio device in determining the maximum transmit power values ​​for the radio device used for SRS transmissions utilizing the TDM SRS port is sufficiently explicitly specified (e.g., as a possibility in 3GPP technical specifications).

[0091] In 506, the wireless device may select the SRS transmit power for SRS transmission based at least in part on the maximum transmit power of the wireless device used for SRS transmission. In some embodiments, the SRS transmit power selection may be based on several considerations, which may also include open-loop power control calculations and closed-loop power control commands. For example, it is possible that the wireless device determines a possible transmit power value based on open-loop power control calculations and closed-loop power control commands, and uses that value as the transmit power for SRS transmission as long as it is less than or equal to the maximum transmit power of the wireless device used for SRS transmission. However, if the value is greater than the maximum transmit power of the wireless device used for SRS transmission, the wireless device may use the maximum transmit power of the wireless device used for SRS transmission as the transmit power for SRS transmission.

[0092] It should be noted that the cellular base station may also be able to determine the maximum transmit power of the radio device used for SRS transmission (e.g., based on radio device capability information and TDM SRS port configuration), and determine the SRS transmission power used for SRS transmission based at least in part on the maximum transmit power of the radio device used for SRS transmission.

[0093] In 508, the wireless device can perform SRS transmission using a selected SRS transmit power. This can include transmission on each SRS symbol configured for SRS transmission, where different SRS antenna ports are used for different SRS symbols in each set of SRS symbols configured for TDM SRS ports. The SRS transmission from the wireless device can be received by the cellular base station. Note that, at least according to some embodiments, the selected SRS transmit power can be linearly divided across the configured antenna ports of each SRS symbol used for SRS transmission. At least as a possibility, the SRS transmission can be used to determine the characteristics of the uplink channel between the wireless device and the cellular base station, which can then be used to configure future uplink transmissions from the wireless device to the cellular base station.

[0094] It should be noted that it is possible for one or more SRS symbols transmitted to experience transmission conflicts or preemption. For example, after configuring SRS transmission, a cellular base station may determine that one or more symbols allocated for SRS transmission will be used instead for different purposes, such as high-priority / low-latency uplink transmission, and may accordingly provide a transmission preemption indication to the radio device. At least according to some implementations, the indication can be provided sufficiently in advance to meet the minimum processing time requirements of the radio device, for example, to ensure that the radio device can identify that a given symbol for SRS transmission is being preempted.

[0095] In this scenario, there may be multiple ways to handle SRS transmissions that include preempted SRS symbols. As one possibility, the wireless device may omit the first SRS symbol with a transmission conflict or preemption, as well as all subsequent SRS symbols in the SRS transmission. As another possibility, the wireless device may omit only the SRS symbols in the SRS transmission that have a transmission conflict or preemption. As yet another possibility, the wireless device may omit the first set of SRS symbols for the TDM SRS port with a transmission conflict or preemption, as well as all subsequent SRS symbols in the SRS transmission. As yet yet another possibility, the wireless device may omit only the set of SRS symbols for the TDM SRS port with a transmission conflict or preemption. It should be noted that for each of these possible methods, at least according to some implementations, when determining the minimum processing time requirement for omitting SRS transmissions, the beginning of the earliest SRS symbol among all SRS symbols omitted in the same time slot is used.

[0096] It should be noted that it is also possible for cellular base stations to effectively implement the latter two methods in a way that is transparent to wireless devices, for example, at least in some cases, by signaling SRS transmission omissions starting from the first SRS symbol in the set of SRS symbols for the TDM SRS port, and including at least the complete set of SRS transmission omissions for the TDM SRS port.

[0097] It is possible that a wireless device can use, for example, wireless device capability information to signal whether it supports one or more such methods. In some cases, one or more of these possible methods (e.g., a first method, as a possibility) may need to be supported by a wireless device that supports a TDM SRS port for SRS transmission, while one or more other such methods (e.g., a second, third, and fourth method, as a possibility) may be optional to be supported by a wireless device that supports a TDM SRS port for SRS transmission. In some cases, the cellular base station can select an SRS collision handling method for the wireless device (e.g., from those methods supported by the wireless device, as indicated in the wireless device capability information) (e.g., specifically for SRS transmission, or generally for SRS transmission), and can provide the wireless device with an indication of the selected SRS collision handling method. The wireless device can then use the indicated method when performing SRS collision handling.

[0098] Therefore, at least according to some implementation schemes, Figure 5The method can be used to provide a framework under which wireless devices can be configured to perform SRS transmissions using TDM SRS ports. This can increase SRS scheduling options and flexibility for cellular networks, which can, in at least some cases, improve network operational efficiency, provide improved wireless device performance and / or reduce wireless device power consumption, among various other potential benefits.

[0099] Figures 6 to 8 and additional information

[0100] Figures 6 to 8 Examples are shown that can be used with, if needed. Figure 5 This method is used in combination with other aspects. However, it should be noted that in Figures 6 to 8 The exemplary details illustrated and described with respect to these figures are not intended to limit this disclosure in their entirety: many variations and alternatives to the details provided herein are possible and should be considered within the scope of this disclosure.

[0101] Various Sound Reference Signal (SRS) designs have been introduced and used in various 3GPP releases. In 3GPP NR Release 15, some SRS design considerations could include the SRS being transmitted only in the last 6 symbols of a time slot, the SRS repeating up to 4 symbols, and SRS support for comb teeth 2 or 4. 3GPP NR Release 16 SRS design considerations could include the SRS being transmitted in any symbol of a time slot, support for SRS repeating with 8 or 12 symbols, and SRS support for comb teeth 8 with 1 or 2 SRS ports. 3GPP NR Release 17 could include further enhancements to SRS coverage and capabilities, such as support for Resource Block (RB) level Partial Frequency Probe (RPFS). For RFPS, start physical RB (PRB) position hopping could be supported. Additionally, SRS repeating with 10 or 14 symbols could be supported, and for comb teeth 8, up to 6 cyclic shifts and 4 SRS ports could be supported.

[0102] Therefore, in the current NR, at least according to some implementations, multiple SRS symbols can be used for repetition to improve coverage, wherein the candidate number of SRS symbols for repetition potentially includes {n1, n2, n4, n8, n10, n12, n14}, and when multiple SRS ports are configured, each SRS symbol can carry the same number of ports.

[0103] As a possible extension of this design, supporting Time Division Multiplexing (TDM) for SRS ports may be beneficial. Therefore, when multiple SRS symbols are used for 8-port SRS transmission, the 8 SRS ports can be time-division multiplexed, allowing different SRS ports to transmit on different SRS symbols. In this disclosure, various possible design details for supporting TDM SRS ports are described, according to at least some embodiments. These design details include those related to SRS power control, TDM SRS port limitations, and SRS collision handling.

[0104] In some implementations, the SRS sequence length supported in NR SRS can include {6, 12, 18, 24, any sequence ≥ 36}. The SRS sequence can be mapped to frequency domain resources (e.g., resource elements (REs)) with a specific comb structure. NRSRS can support comb structures with comb tooth values ​​of 2, 4, or 8. The comb tooth N (e.g., N = 2 / 4 / 8) can be subsampled with a factor N on the RE; different comb teeth can be orthogonal because they can be non-overlapping in frequency. Figure 6 The RE mapping with various possible comb offsets (e.g., 0 / 1 / 2 / 3) with a comb factor of 4 is illustrated as an example.

[0105] In some implementations, multiple cyclic shift sequences (e.g., discrete Fourier transforms for creating orthogonal tones) can be applied over the same SRS sequence. In some cases, a cyclic shift sequence of length M can have M orthogonal sequences. This can be achieved by using the same SRS comb offset to create M orthogonal SRS sequences. In some implementations (e.g., in 3GPP TS 38.211 v.17.5.0), the cyclic shift sequence length M can be a function of the comb size N; as a possibility, comb 2 can have up to 8 cyclic shifts, comb 4 can have up to 12 cyclic shifts, and comb 8 can have up to 6 cyclic shifts.

[0106] SRS power control in 3GPP TS 38.213 v.17.6.0 can specify that, for SRS, the UE equally allocates transmit power across the active uplink (UL) bandwidth portion (BWP) b of the carrier f of the serving cell c for SRS using the configured antenna ports. linear value If the UE uses the SRS power control adjustment state with index l to transmit SRS on the active UL BWP b of carrier f in serving cell c based on the SRS-ResourceSet configuration, then the UE can determine the SRS transmission power in SRS transmission timing i as follows:

[0107]

[0108] When SRS ports are time-division multiplexed, since the UE is not using all SRS ports for a given SRS symbol, it is possible (e.g., depending on the UE design) that the UE cannot use... send.

[0109] For multi-port (e.g., 8-port) SRS, when configuring TDM SRS ports, if the UE cannot use the port number per SRS symbol due to the reduced number of ports... If transmitting, it is possible that the UE can do so for each SRS symbol. The maximum power transmission, for example, where .

[0110] To account for this scenario, it is possible to update the equation in Clause 7.3.1 of 3GPP TS 38.213 v.17.6.0 so that... Replaced with ,in This is the maximum transmit power that the UE can use for the TDM SRS port. Alternatively, it is possible that the 3GPP technical specifications have not been updated in this way, and... The calculation can be left to the UE to implement based on the reduced number of ports.

[0111] For multi-port (e.g., 8-port) SRS, when configuring TDM SRS ports, if the UE cannot... Send and in the equation in Clause 7.3.1 of 3GPP TS 38.213 v.17.6.0 Replaced with ,At once In other words, it is possible that the UE can report increments to the network (e.g., As part of the UE capability report, which includes:

[0112]

[0113] It can be {0dB, 3dB}, etc.

[0114] In some implementation schemes, The UE power level can be additionally or alternatively determined by the network based on the UE power level and TDM SRS port configuration. The UE power level can be reported as a UE capability.

[0115] Note further that the UE needs to report to the network. Or power level to determine for UE In various implementation schemes, the same value can be reported for both SRS resource sets with the purpose of "codebook" and "antenna switching", or different values ​​can be reported for SRS resource sets with the purpose of "codebook" and "antenna switching".

[0116] In some cases, the UE needs to report to the network. Or power level to determine for UE In the scenario, used The calculated maximum transmit power can be configured by the network via Radio Resource Control (RRC) signaling. It should be noted that the maximum transmit power configured by RRC may not be allowed to exceed the UE's reported capacity; otherwise, the UE's reported capacity could be used... calculate.

[0117] It should be noted that, depending on the implementation plan, if used for The calculated final maximum transmit power can be configured by the network via RRC. It is possible that the same maximum transmit power is configured by the network for both the "codebook" and "antenna switching" SRS resource sets, or different maximum transmit powers can be configured by the network for both the "codebook" and "antenna switching" SRS resource sets.

[0118] In some cases, it is possible that SRS port time-division multiplexing can be configured on different numbers of symbols; for example, for an 8-port SRS configuration, s={2,4,8} might be a possible value for the number of SRS symbols for the TDM SRS port, which could affect the maximum possible transmit power for a given UE. Therefore, in some implementations, among other considerations or as an alternative, it is possible that the UE-reported... The value depends at least in part on the s parameter of the configuration for the SRS port TDM configuration, and / or may vary. The value can be reported by the UE for different s values. As an example, the UE can therefore report:

[0119] For s=2, =0dB

[0120] For s=2, =3dB

[0121] For s=8, =6dB

[0122] Many other reporting options are also possible.

[0123] Figure 7An example aspect of a possible time-division multiplexed probe reference signal port configuration according to some implementations is illustrated. Configuration parameters used in the illustrated configuration may include m, the number of SRS symbols in the time slot (e.g., nrofSymbol configured in SRS-Resource), s, the number of SRS symbols for the TDM SRS port, and R, the number of repeating s symbols for frequency hopping (e.g., repetitionFactor configured in SRS-Resource). In the illustrated scenario, s=2, R=2, and m=8.

[0124] Given such a configuration framework, it may be useful, at least according to some implementations, to impose certain restrictions on parameter values, for example, to facilitate efficient operation in 3GPP NR communication systems. As an example, when configuring TDM SRS ports (e.g., for 8-port SRS), it is possible that m must be an integer multiple of sR. As another possibility, when configuring TDM SRS ports, for codebook-based SRS transmission, for partially coherent operation, it is possible that the UE is not expected to transmit SRS ports from the same coherent SRS port group in different symbols within a given set of s SRS symbols. Therefore, in some implementations, when the number of coherent SRS port groups is 2 (N... g When the number of coherent SRS port groups is 4 (N=2), each of these coherent SRS port groups has 4 SRS ports (e.g., for an 8-port SRS). It's possible that SRS ports {1000, 1001, 1004, 1005} must be transmitted in the same symbol, and SRS ports {1002, 1003, 1006, 1007} ​​must also be transmitted in the same symbol. Using a similar framework, when the number of coherent SRS port groups is 4 (N=2), g When =4), where each of these SRS port groups has 2 SRS ports (e.g., for an 8-port SRS), it is possible that SRS ports {1000,1004} must be sent in the same symbol, {1001,1005} must be sent in the same symbol, {1002,1006} must be sent in the same symbol, and {1003,1007} ​​must be sent in the same symbol.

[0125] When configuring a TDM SRS port, if one or more SRS symbols experience a transmit conflict / preemption, there may be multiple options for handling such transmit conflicts / preemption. Figure 8Example aspects of various possible conflict handling options according to some implementation schemes are illustrated. As shown, in the illustrated scenario, SRS TDM parameters s=2 and m=8 can be configured, and SRS symbol 3 may have a transmission conflict / preemption. As an option, it is possible to omit the first SRS symbol with a transmission conflict / preemption, as well as all subsequent SRS symbols. Therefore, in the illustrated scenario (shown as "Option 1"), SRS symbols 3 to 7 can be omitted. As another option, only the SRS symbols with transmission conflicts / preemption can be omitted. Therefore, in the illustrated scenario (shown as "Option 2"), SRS symbol 3 can be omitted. As yet another option, the first subset of s SRS symbols with transmission conflicts / preemption, as well as all subsequent SRS symbols, can be omitted. Therefore, in the illustrated scenario (shown as "Option 3"), SRS symbols 2 to 7 can be omitted. As yet another option, only the subset of s SRS symbols with transmission conflicts / preemption can be omitted. Therefore, in the illustrated scenario (shown as "Option 4"), SRS symbols 2 to 3 can be omitted.

[0126] In some implementations, to determine the minimum processing time required for SRS transmission omission in such scenarios, it is possible that the earliest SRS symbol among all SRS symbols omitted in the same time slot is used to determine the minimum processing time requirement. Therefore, in such implementations, at least in some cases, the described third and fourth options may require earlier timing for SRS transmission omission compared to the described first and second options.

[0127] In some implementations, support for one or more conflict resolution options when a TDM SRS port is configured and one or more SRS symbols in the SRS symbols experience a transmission collision / preemption can be considered a basic or required UE feature, while other such conflict resolution options can be considered optional UE features. For example, it's possible that "Option 1" (e.g., the first SRS symbol with a transmission collision / preemption and all subsequent SRS symbols are omitted) is a basic UE feature, while Option 2 (e.g., only the SRS symbol with a transmission collision / preemption is omitted), Option 3 (e.g., a first subset of s SRS symbols with a transmission collision / preemption and all subsequent SRS symbols are omitted), and Option 4 (e.g., only a subset of s SRS symbols with a transmission collision / preemption are omitted) are optional UE features. In this scenario, even for a UE supporting a TDM SRS port, it's possible that the UE does not need to support Options 2, 3, or 4. After the UE reports its capabilities in this regard, the network can configure the options to be used for SRS collisions. It's possible that such configuration does not exceed the UE's capabilities (e.g., options not supported by the UE are not configured).

[0128] Further exemplary implementations are provided below.

[0129] One set of implementations may include a method comprising: a wireless device receiving information configured to transmit an SRS using a Time Division Multiplexing (TDM) Sounding Reference Signal (SRS) port; determining, at least in part, a maximum transmit power of the wireless device for the SRS transmission based on the TDM SRS port; selecting an SRS transmission power for the SRS transmission based at least in part on the maximum transmit power of the wireless device for the SRS transmission; and performing the SRS transmission using the selected SRS transmission power.

[0130] According to some implementations, the method further includes: providing wireless device capability information to a cellular base station, wherein the maximum transmit power of the wireless device used for SRS transmission is determined at least in part based on the wireless device capability information provided to the cellular base station.

[0131] According to some implementations, the wireless device capability information indicates one or more of the following: one or more maximum transmit power increment values ​​for a TDM SRS port, wherein the one or more maximum transmit power increment values ​​for a TDM SRS port are used to calculate the maximum transmit power of the wireless device for SRS transmission from the baseline maximum transmit power of the wireless device; or wireless device power level information for the wireless device.

[0132] According to some implementations, the wireless device capability information indicates a value for determining the maximum transmit power of the wireless device for SRS transmission for each of a plurality of different SRS resource set uses.

[0133] According to some implementations, the wireless device capability information indicates a value for determining the maximum transmit power of the wireless device used for SRS transmission, the maximum transmit power being applied to multiple different SRS resource sets.

[0134] According to some implementations, the maximum transmit power of the wireless device used for the SRS transmission is further determined at least in part based on the number of SRS symbols configured for the TDM SRS port for the SRS transmission.

[0135] Another set of embodiments may include an apparatus comprising: a processor configured to cause a wireless device to: receive information configuring SRS transmission using a Time Division Multiplexing (TDM) Sounding Reference Signal (SRS) port; select an SRS transmission power for the SRS transmission based at least in part on the TDM SRS port; and perform the SRS transmission using the selected SRS transmission power.

[0136] According to some implementations, the processor is further configured to cause the wireless device to: provide wireless device capability information to a cellular base station; and receive configuration information from the cellular base station, the configuration information indicating the maximum transmit power of the wireless device for SRS transmission using a TDM SRS port, wherein the maximum transmit power of the wireless device for SRS transmission using a TDM SRS port is determined at least in part based on the wireless device capability information, wherein the SRS transmission power for SRS transmission is determined at least in part based on the maximum transmit power of the wireless device for SRS transmission using a TDM SRS port.

[0137] According to some implementations, the configuration information received from the cellular base station indicates the maximum transmit power of the wireless device for SRS transmission using the TDM SRS port for each of a plurality of different SRS resource set uses.

[0138] According to some implementations, the configuration information received from the cellular base station indicates the maximum transmit power of the wireless device for SRS transmission using the TDM SRS port, the maximum transmit power being applied to multiple different SRS resource sets.

[0139] According to some implementation schemes, the information indication configured for the SRS transmission includes: the number of SRS symbols configured for the TDM SRS port for SRS transmission: "s"; the number of repeating sets of s SRS symbols configured for frequency hopping for the SRS transmission: "R"; and the number of SRS symbols in the time slot configured for the SRS transmission: m, where m is an integer multiple of sR.

[0140] According to some implementation schemes, the SRS transmission is a codebook-based SRS transmission using partially coherent operations, wherein in each SRS symbol of the SRS transmission, the SRS transmission is performed using an SRS port in the same coherent SRS port group.

[0141] According to some implementations, the processor is further configured to enable the wireless device to determine an SRS conflict resolution method for the SRS transmission in the event that one or more SRS symbols transmitted by the SRS experience a transmission conflict or preemption.

[0142] According to some implementations, the SRS conflict resolution method includes one of the following: omitting a first SRS symbol with a transmission conflict or preemption and all subsequent SRS symbols transmitted by the SRS; omitting only the SRS symbols transmitted by the SRS with a transmission conflict or preemption; omitting a first set of SRS symbols with a transmission conflict or preemption for a TDM SRS port and all subsequent SRS symbols transmitted by the SRS; or omitting only the set of SRS symbols transmitted by the SRS with a transmission conflict or preemption for a TDM SRS port.

[0143] According to some implementation schemes, the start of the earliest SRS symbol among all SRS symbols omitted in the same time slot is taken into account for the minimum processing time requirement for SRS transmission omission.

[0144] Another set of embodiments may include a cellular base station comprising: an antenna; a radio component operatively coupled to the antenna; and a processor operatively coupled to the radio component; wherein the cellular base station is configured to: provide information to a wireless device, the information being configured to utilize SRS transmission via a Time Division Multiplexing (TDM) Sounding Reference Signal (SRS) port; and receive the SRS transmission from the wireless device at an SRS transmission power, wherein the SRS transmission power is determined at least in part based on a maximum transmission power of the wireless device for the SRS transmission, and wherein the maximum transmission power is determined at least in part based on the TDM SRS port.

[0145] According to some implementations, the cellular base station is further configured to: receive wireless device capability information from the wireless device; determine one or more maximum transmit power values ​​of the wireless device for SRS transmission using a TDM SRS port, at least in part based on the wireless device capability information; and send configuration information to the wireless device, the configuration information indicating the one or more maximum transmit power values ​​of the wireless device for SRS transmission using a TDM SRS port.

[0146] According to some implementations, the wireless device capability information includes the maximum transmit power increment value of the wireless device for SRS transmission using a TDM SRS port for one or more of the following: one or more SRS resource set uses; or one or more SRS symbols for a TDM SRS port.

[0147] According to some implementations, the information configured for SRS transmission indicates one or more of the following: the number of SRS symbols configured for SRS transmission for a TDM SRS port: “s”; the number of repeating sets of s SRS symbols configured for frequency hopping in the SRS transmission: “R”; and the number of SRS symbols in a time slot configured for SRS transmission: m, where m is an integer multiple of sR.

[0148] According to some implementation schemes, the cellular base station is further configured to: receive wireless device capability information indicating whether the wireless device supports one or more SRS conflict resolution methods; select an SRS conflict resolution method for the wireless device based at least in part on the wireless device capability information indicating whether the wireless device supports one or more SRS conflict resolution methods; and send an indication to the wireless device of the selected SRS conflict resolution method.

[0149] Another exemplary implementation may include a method comprising: performing any or all of the foregoing examples by a wireless device.

[0150] Another exemplary embodiment may include a device comprising: an antenna; a radio component coupled to the antenna; and a processing element operatively coupled to the radio component, wherein the device is configured to implement any or all of the foregoing examples.

[0151] Another set of exemplary embodiments may include a non-transitory computer-accessible memory medium that includes program instructions that, when executed at the device, cause the device to implement any or all of the foregoing examples.

[0152] Another set of exemplary embodiments may include a computer program that includes instructions for performing any or all portions of any of the examples in the foregoing examples.

[0153] Another set of exemplary embodiments may include an apparatus comprising components for performing any or all of the elements of any of the examples in the foregoing examples.

[0154] Another set of exemplary embodiments may include an apparatus comprising a processor configured to cause a wireless device to perform any or all elements of any of the foregoing examples.

[0155] As is widely recognized, the use of personally identifiable information should comply with privacy policies and measures that are generally accepted to meet or exceed industry or governmental requirements for protecting 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 authorized use should be clearly explained to users.

[0156] By interpreting each message / signal X received by the user equipment (UE) in the downlink as a message / signal X sent by the base station, and interpreting each message / signal Y sent by the UE in the uplink as a message / signal Y received by the base station, any of the methods described herein for operating the UE can serve as the basis for a corresponding method for operating the base station.

[0157] Embodiments of this disclosure may be implemented in any of a variety of forms. For example, in some embodiments, the subject matter may be implemented as a computer-implemented method, a computer-readable storage medium, or a computer system. In other embodiments, the subject matter may be implemented using one or more custom-designed hardware devices such as ASICs. In still other embodiments, the subject matter may be implemented using one or more programmable hardware elements such as FPGAs.

[0158] In some implementations, a non-transitory computer-readable storage medium (e.g., a non-transitory memory element) may be configured to store program instructions and / or data, wherein if these program instructions are executed by a computer system, the computer system performs a method, such as any method implementation of the method implementations described herein, or any combination of method implementations described herein, or any subset of any method implementations described herein, or any combination of such subsets.

[0159] In some implementations, the device (e.g., UE) may be configured to include a processor (or a set of processors) and a memory medium (or memory element), wherein the memory medium stores program instructions, and the processor is configured to read from and execute the program instructions from the memory medium, wherein the program instructions are executable to implement any method implementation (or any combination of method implementations described herein, or any subset of any method implementations described herein, or any combination of such subsets) of the various method implementations described herein. The device may be implemented in any of the various forms.

[0160] Although the above embodiments have been described in considerable detail, many variations and modifications will become apparent to those skilled in the art once the above disclosure is fully understood. It is intended that the following claims be construed as encompassing all such variations and modifications.

Claims

1. A method comprising: by a wireless device: receiving information configuring sounding reference signal (SRS) transmission with time division multiplexing (TDM) SRS ports; determining a maximum transmit power of the wireless device for the SRS transmission based at least in part on the TDM SRS ports; selecting an SRS transmit power for the SRS transmission based at least in part on the maximum transmit power of the wireless device for the SRS transmission; and performing the SRS transmission using the selected SRS transmit power.

2. The method of claim 1, wherein the method further comprises: providing wireless device capability information to a cellular base station, wherein the maximum transmit power of the wireless device for the SRS transmission is determined based at least in part on the wireless device capability information provided to the cellular base station.

3. The method of claim 2, wherein the wireless device capability information indicates one or more of: one or more maximum transmit power delta values for TDM SRS ports, wherein the one or more maximum transmit power delta values for TDM SRS ports are used to calculate a maximum transmit power of the wireless device for SRS transmission from a baseline maximum transmit power of the wireless device; or wireless device power class information for the wireless device.

4. The method of claim 2, wherein the wireless device capability information indicates values for determining a maximum transmit power of the wireless device for SRS transmission for each of a plurality of different SRS resource set usages.

5. The method of claim 2, wherein the wireless device capability information indicates values for determining a maximum transmit power of the wireless device for SRS transmission, the maximum transmit power applying to a plurality of different SRS resource set usages.

6. The method of claim 1, wherein the maximum transmit power of the wireless device for the SRS transmission is further determined based at least in part on a number of SRS symbols for TDM SRS ports configured for the SRS transmission.

7. An apparatus comprising: a processor configured to cause a wireless device to: receive information configuring sounding reference signal (SRS) transmission with time division multiplexing (TDM) SRS ports; select an SRS transmit power for the SRS transmission based at least in part on the TDM SRS ports; and perform the SRS transmission using the selected SRS transmit power.

8. The apparatus of claim 7, wherein the processor is further configured to cause the wireless device to: provide wireless device capability information to a cellular base station; and ​ receive configuration information from the cellular base station, the configuration information indicating a maximum transmit power of the wireless device for SRS transmissions with TDM SRS ports, wherein the maximum transmit power of the wireless device for SRS transmissions with TDM SRS ports is determined based at least in part on the wireless device capability information, wherein the SRS transmit power for the SRS transmissions is determined based at least in part on the maximum transmit power of the wireless device for SRS transmissions with TDM SRS ports.

9. The apparatus of claim 8, wherein the configuration information received from the cellular base station indicates a maximum transmit power of the wireless device for SRS transmissions with TDM SRS ports for each of a plurality of different SRS resource set uses.

10. The apparatus of claim 8, wherein the configuration information received from the cellular base station indicates a maximum transmit power of the wireless device for SRS transmissions with TDM SRS ports, the maximum transmit power applying to a plurality of different SRS resource set uses.

11. The apparatus of claim 7, wherein the information configuring the SRS transmissions indicates: a number of SRS symbols for TDM SRS ports configured for the SRS transmissions: “s”; a number of repeating sets of s SRS symbols for frequency hopping configured for the SRS transmissions: “R”; and a number of SRS symbols in a slot configured for the SRS transmissions: m, wherein m is an integer multiple of sR.

12. The apparatus of claim 7, wherein the SRS transmissions are codebook-based SRS transmissions with partial coherence operation, wherein in each SRS symbol of the SRS transmissions, the SRS transmissions are performed using SRS ports in a same coherent SRS port group.

13. The apparatus of claim 7, wherein the processor is further configured to cause the wireless device to: determine a SRS collision handling method for the SRS transmissions in a case that one or more SRS symbols of the SRS transmissions experience a transmission collision or pre-emption.

14. The apparatus of claim 13, wherein the SRS collision handling method comprises one of: omitting a first SRS symbol with a transmission collision or pre-emption and all subsequent SRS symbols of the SRS transmissions; omitting only SRS symbols of the SRS transmissions with a transmission collision or pre-emption; omitting a first set of SRS symbols for TDM SRS ports with a transmission collision or pre-emption and all subsequent SRS symbols of the SRS transmissions; omitting only a set of SRS symbols for TDM SRS ports of the SRS transmissions with a transmission collision or pre-emption.

15. The apparatus of claim 14, wherein a start of an earliest SRS symbol among all SRS symbols omitted in a same slot is used for a minimum processing time requirement consideration for SRS transmission omission.

16. A cellular base station, the cellular base station comprising: an antenna; a radio operably coupled to the antenna; and a processor operably coupled to the radio; wherein the cellular base station is configured to: provide information to a wireless device configuring sounding reference signal (SRS) transmissions utilizing time division multiplexed (TDM) SRS ports; and receive the SRS transmissions from the wireless device at an SRS transmission power, wherein the SRS transmission power is determined based at least in part on a maximum transmission power of the wireless device for the SRS transmissions, and wherein the maximum transmission power is determined based at least in part on the TDM SRS ports.

17. The cellular base station of claim 16, wherein the cellular base station is further configured to: receive wireless device capability information from the wireless device; determine one or more maximum transmission power values of the wireless device for SRS transmissions utilizing TDM SRS ports based at least in part on the wireless device capability information; and transmit configuration information to the wireless device indicating the one or more maximum transmission power values of the wireless device for SRS transmissions utilizing TDM SRS ports.

18. The cellular base station of claim 17, wherein the wireless device capability information comprises a maximum transmission power increment value of the wireless device for SRS transmissions utilizing TDM SRS ports for each of one or more of: one or more SRS resource set usages; or one or more quantities of SRS symbols for TDM SRS ports.

19. The cellular base station of claim 16, wherein the information configuring the SRS transmissions indicates one or more of: a quantity of SRS symbols for TDM SRS ports configured for the SRS transmissions: “s”; a quantity of repeating sets of s SRS symbols for frequency hopping configured for the SRS transmissions: “R”; and a quantity of SRS symbols in a slot configured for the SRS transmissions: m, wherein m is an integer multiple of sR.

20. The cellular base station of claim 16, wherein the cellular base station is further configured to: receive wireless device capability information indicating whether the wireless device supports one or more SRS collision handling methods; select a SRS collision handling method for the wireless device based at least in part on the wireless device capability information indicating whether the wireless device supports one or more SRS collision handling methods; and transmit an indication of the selected SRS collision handling method to the wireless device. ​

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